1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
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"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
47 #include "c-family/c-common.h"
48 #include "c-family/c-objc.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "pointer-set.h"
55 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR
, /* variable */
61 BSP_PARM
, /* parameter */
66 static tree
grokparms (tree parmlist
, tree
*);
67 static const char *redeclaration_error_message (tree
, tree
);
69 static int decl_jump_unsafe (tree
);
70 static void require_complete_types_for_parms (tree
);
71 static int ambi_op_p (enum tree_code
);
72 static int unary_op_p (enum tree_code
);
73 static void push_local_name (tree
);
74 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
75 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
77 static int check_static_variable_definition (tree
, tree
);
78 static void record_unknown_type (tree
, const char *);
79 static tree
builtin_function_1 (tree
, tree
, bool);
80 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
81 static int member_function_or_else (tree
, tree
, enum overload_flags
);
82 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
84 static void check_for_uninitialized_const_var (tree
);
85 static hashval_t
typename_hash (const void *);
86 static int typename_compare (const void *, const void *);
87 static tree
local_variable_p_walkfn (tree
*, int *, void *);
88 static tree
record_builtin_java_type (const char *, int);
89 static const char *tag_name (enum tag_types
);
90 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
91 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
92 static void maybe_deduce_size_from_array_init (tree
, tree
);
93 static void layout_var_decl (tree
);
94 static tree
check_initializer (tree
, tree
, int, tree
*);
95 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
96 static void save_function_data (tree
);
97 static void copy_type_enum (tree
, tree
);
98 static void check_function_type (tree
, tree
);
99 static void finish_constructor_body (void);
100 static void begin_destructor_body (void);
101 static void finish_destructor_body (void);
102 static void record_key_method_defined (tree
);
103 static tree
create_array_type_for_decl (tree
, tree
, tree
);
104 static tree
get_atexit_node (void);
105 static tree
get_dso_handle_node (void);
106 static tree
start_cleanup_fn (void);
107 static void end_cleanup_fn (void);
108 static tree
cp_make_fname_decl (location_t
, tree
, int);
109 static void initialize_predefined_identifiers (void);
110 static tree check_special_function_return_type
111 (special_function_kind
, tree
, tree
);
112 static tree
push_cp_library_fn (enum tree_code
, tree
);
113 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
114 static void store_parm_decls (tree
);
115 static void initialize_local_var (tree
, tree
);
116 static void expand_static_init (tree
, tree
);
118 /* The following symbols are subsumed in the cp_global_trees array, and
119 listed here individually for documentation purposes.
122 tree wchar_decl_node;
124 tree vtable_entry_type;
125 tree delta_type_node;
126 tree __t_desc_type_node;
128 tree class_type_node;
129 tree unknown_type_node;
131 Array type `vtable_entry_type[]'
134 tree vtbl_ptr_type_node;
141 A FUNCTION_DECL which can call `abort'. Not necessarily the
142 one that the user will declare, but sufficient to be called
143 by routines that want to abort the program.
147 The FUNCTION_DECL for the default `::operator delete'.
149 tree global_delete_fndecl;
152 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
153 tree tinfo_var_id; */
155 tree cp_global_trees
[CPTI_MAX
];
157 /* Indicates that there is a type value in some namespace, although
158 that is not necessarily in scope at the moment. */
160 tree global_type_node
;
162 /* The node that holds the "name" of the global scope. */
163 tree global_scope_name
;
165 #define local_names cp_function_chain->x_local_names
167 /* A list of objects which have constructors or destructors
168 which reside in the global scope. The decl is stored in
169 the TREE_VALUE slot and the initializer is stored
170 in the TREE_PURPOSE slot. */
171 tree static_aggregates
;
175 /* A node for the integer constant 2. */
177 tree integer_two_node
;
179 /* Used only for jumps to as-yet undefined labels, since jumps to
180 defined labels can have their validity checked immediately. */
182 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
183 struct named_label_use_entry
*next
;
184 /* The binding level to which this entry is *currently* attached.
185 This is initially the binding level in which the goto appeared,
186 but is modified as scopes are closed. */
187 struct cp_binding_level
*binding_level
;
188 /* The head of the names list that was current when the goto appeared,
189 or the inner scope popped. These are the decls that will *not* be
190 skipped when jumping to the label. */
192 /* The location of the goto, for error reporting. */
193 location_t o_goto_locus
;
194 /* True if an OpenMP structured block scope has been closed since
195 the goto appeared. This means that the branch from the label will
196 illegally exit an OpenMP scope. */
200 /* A list of all LABEL_DECLs in the function that have names. Here so
201 we can clear out their names' definitions at the end of the
202 function, and so we can check the validity of jumps to these labels. */
204 struct GTY(()) named_label_entry
{
205 /* The decl itself. */
208 /* The binding level to which the label is *currently* attached.
209 This is initially set to the binding level in which the label
210 is defined, but is modified as scopes are closed. */
211 struct cp_binding_level
*binding_level
;
212 /* The head of the names list that was current when the label was
213 defined, or the inner scope popped. These are the decls that will
214 be skipped when jumping to the label. */
216 /* A vector of all decls from all binding levels that would be
217 crossed by a backward branch to the label. */
218 VEC(tree
,gc
) *bad_decls
;
220 /* A list of uses of the label, before the label is defined. */
221 struct named_label_use_entry
*uses
;
223 /* The following bits are set after the label is defined, and are
224 updated as scopes are popped. They indicate that a backward jump
225 to the label will illegally enter a scope of the given flavor. */
231 #define named_labels cp_function_chain->x_named_labels
233 /* The number of function bodies which we are currently processing.
234 (Zero if we are at namespace scope, one inside the body of a
235 function, two inside the body of a function in a local class, etc.) */
238 /* To avoid unwanted recursion, finish_function defers all mark_used calls
239 encountered during its execution until it finishes. */
240 bool defer_mark_used_calls
;
241 VEC(tree
, gc
) *deferred_mark_used_calls
;
243 /* States indicating how grokdeclarator() should handle declspecs marked
244 with __attribute__((deprecated)). An object declared as
245 __attribute__((deprecated)) suppresses warnings of uses of other
247 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
250 /* A list of VAR_DECLs whose type was incomplete at the time the
251 variable was declared. */
253 typedef struct GTY(()) incomplete_var_d
{
255 tree incomplete_type
;
258 DEF_VEC_O(incomplete_var
);
259 DEF_VEC_ALLOC_O(incomplete_var
,gc
);
261 static GTY(()) VEC(incomplete_var
,gc
) *incomplete_vars
;
263 /* Returns the kind of template specialization we are currently
264 processing, given that it's declaration contained N_CLASS_SCOPES
265 explicit scope qualifications. */
268 current_tmpl_spec_kind (int n_class_scopes
)
270 int n_template_parm_scopes
= 0;
271 int seen_specialization_p
= 0;
272 int innermost_specialization_p
= 0;
273 struct cp_binding_level
*b
;
275 /* Scan through the template parameter scopes. */
276 for (b
= current_binding_level
;
277 b
->kind
== sk_template_parms
;
280 /* If we see a specialization scope inside a parameter scope,
281 then something is wrong. That corresponds to a declaration
284 template <class T> template <> ...
286 which is always invalid since [temp.expl.spec] forbids the
287 specialization of a class member template if the enclosing
288 class templates are not explicitly specialized as well. */
289 if (b
->explicit_spec_p
)
291 if (n_template_parm_scopes
== 0)
292 innermost_specialization_p
= 1;
294 seen_specialization_p
= 1;
296 else if (seen_specialization_p
== 1)
297 return tsk_invalid_member_spec
;
299 ++n_template_parm_scopes
;
302 /* Handle explicit instantiations. */
303 if (processing_explicit_instantiation
)
305 if (n_template_parm_scopes
!= 0)
306 /* We've seen a template parameter list during an explicit
307 instantiation. For example:
309 template <class T> template void f(int);
311 This is erroneous. */
312 return tsk_invalid_expl_inst
;
314 return tsk_expl_inst
;
317 if (n_template_parm_scopes
< n_class_scopes
)
318 /* We've not seen enough template headers to match all the
319 specialized classes present. For example:
321 template <class T> void R<T>::S<T>::f(int);
323 This is invalid; there needs to be one set of template
324 parameters for each class. */
325 return tsk_insufficient_parms
;
326 else if (n_template_parm_scopes
== n_class_scopes
)
327 /* We're processing a non-template declaration (even though it may
328 be a member of a template class.) For example:
330 template <class T> void S<T>::f(int);
332 The `class T' matches the `S<T>', leaving no template headers
333 corresponding to the `f'. */
335 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
336 /* We've got too many template headers. For example:
338 template <> template <class T> void f (T);
340 There need to be more enclosing classes. */
341 return tsk_excessive_parms
;
343 /* This must be a template. It's of the form:
345 template <class T> template <class U> void S<T>::f(U);
347 This is a specialization if the innermost level was a
348 specialization; otherwise it's just a definition of the
350 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
353 /* Exit the current scope. */
361 /* When a label goes out of scope, check to see if that label was used
362 in a valid manner, and issue any appropriate warnings or errors. */
365 pop_label (tree label
, tree old_value
)
367 if (!processing_template_decl
)
369 if (DECL_INITIAL (label
) == NULL_TREE
)
373 error ("label %q+D used but not defined", label
);
374 location
= input_location
; /* FIXME want (input_filename, (line)0) */
375 /* Avoid crashing later. */
376 define_label (location
, DECL_NAME (label
));
379 warn_for_unused_label (label
);
382 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
385 /* At the end of a function, all labels declared within the function
386 go out of scope. BLOCK is the top-level block for the
390 pop_labels_1 (void **slot
, void *data
)
392 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
393 tree block
= (tree
) data
;
395 pop_label (ent
->label_decl
, NULL_TREE
);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
400 BLOCK_VARS (block
) = ent
->label_decl
;
402 htab_clear_slot (named_labels
, slot
);
408 pop_labels (tree block
)
412 htab_traverse (named_labels
, pop_labels_1
, block
);
417 /* At the end of a block with local labels, restore the outer definition. */
420 pop_local_label (tree label
, tree old_value
)
422 struct named_label_entry dummy
;
425 pop_label (label
, old_value
);
427 dummy
.label_decl
= label
;
428 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
429 htab_clear_slot (named_labels
, slot
);
432 /* The following two routines are used to interface to Objective-C++.
433 The binding level is purposely treated as an opaque type. */
436 objc_get_current_scope (void)
438 return current_binding_level
;
441 /* The following routine is used by the NeXT-style SJLJ exceptions;
442 variables get marked 'volatile' so as to not be clobbered by
443 _setjmp()/_longjmp() calls. All variables in the current scope,
444 as well as parent scopes up to (but not including) ENCLOSING_BLK
445 shall be thusly marked. */
448 objc_mark_locals_volatile (void *enclosing_blk
)
450 struct cp_binding_level
*scope
;
452 for (scope
= current_binding_level
;
453 scope
&& scope
!= enclosing_blk
;
454 scope
= scope
->level_chain
)
458 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
459 objc_volatilize_decl (decl
);
461 /* Do not climb up past the current function. */
462 if (scope
->kind
== sk_function_parms
)
467 /* Update data for defined and undefined labels when leaving a scope. */
470 poplevel_named_label_1 (void **slot
, void *data
)
472 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
473 struct cp_binding_level
*bl
= (struct cp_binding_level
*) data
;
474 struct cp_binding_level
*obl
= bl
->level_chain
;
476 if (ent
->binding_level
== bl
)
480 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
481 TREE_LISTs representing OVERLOADs, so be careful. */
482 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
484 : TREE_CHAIN (decl
)))
485 if (decl_jump_unsafe (decl
))
486 VEC_safe_push (tree
, gc
, ent
->bad_decls
, decl
);
488 ent
->binding_level
= obl
;
489 ent
->names_in_scope
= obl
->names
;
493 ent
->in_try_scope
= true;
496 ent
->in_catch_scope
= true;
499 ent
->in_omp_scope
= true;
507 struct named_label_use_entry
*use
;
509 for (use
= ent
->uses
; use
; use
= use
->next
)
510 if (use
->binding_level
== bl
)
512 use
->binding_level
= obl
;
513 use
->names_in_scope
= obl
->names
;
514 if (bl
->kind
== sk_omp
)
515 use
->in_omp_scope
= true;
522 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
523 when errors were reported, except for -Werror-unused-but-set-*. */
524 static int unused_but_set_errorcount
;
526 /* Exit a binding level.
527 Pop the level off, and restore the state of the identifier-decl mappings
528 that were in effect when this level was entered.
530 If KEEP == 1, this level had explicit declarations, so
531 and create a "block" (a BLOCK node) for the level
532 to record its declarations and subblocks for symbol table output.
534 If FUNCTIONBODY is nonzero, this level is the body of a function,
535 so create a block as if KEEP were set and also clear out all
538 If REVERSE is nonzero, reverse the order of decls before putting
539 them into the BLOCK. */
542 poplevel (int keep
, int reverse
, int functionbody
)
545 /* The chain of decls was accumulated in reverse order.
546 Put it into forward order, just for cleanliness. */
551 int leaving_for_scope
;
554 cp_label_binding
*label_bind
;
556 timevar_start (TV_NAME_LOOKUP
);
561 gcc_assert (current_binding_level
->kind
!= sk_class
);
563 if (current_binding_level
->kind
== sk_cleanup
)
565 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
567 gcc_assert (!VEC_length(cp_class_binding
,
568 current_binding_level
->class_shadowed
));
570 /* We used to use KEEP == 2 to indicate that the new block should go
571 at the beginning of the list of blocks at this binding level,
572 rather than the end. This hack is no longer used. */
573 gcc_assert (keep
== 0 || keep
== 1);
575 if (current_binding_level
->keep
)
578 /* Any uses of undefined labels, and any defined labels, now operate
579 under constraints of next binding contour. */
580 if (cfun
&& !functionbody
&& named_labels
)
581 htab_traverse (named_labels
, poplevel_named_label_1
,
582 current_binding_level
);
584 /* Get the decls in the order they were written.
585 Usually current_binding_level->names is in reverse order.
586 But parameter decls were previously put in forward order. */
589 current_binding_level
->names
590 = decls
= nreverse (current_binding_level
->names
);
592 decls
= current_binding_level
->names
;
594 /* If there were any declarations or structure tags in that level,
595 or if this level is a function body,
596 create a BLOCK to record them for the life of this function. */
598 if (keep
== 1 || functionbody
)
599 block
= make_node (BLOCK
);
600 if (block
!= NULL_TREE
)
602 BLOCK_VARS (block
) = decls
;
603 BLOCK_SUBBLOCKS (block
) = subblocks
;
606 /* In each subblock, record that this is its superior. */
608 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
609 BLOCK_SUPERCONTEXT (link
) = block
;
611 /* We still support the old for-scope rules, whereby the variables
612 in a for-init statement were in scope after the for-statement
613 ended. We only use the new rules if flag_new_for_scope is
616 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
618 /* Before we remove the declarations first check for unused variables. */
619 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
620 && !processing_template_decl
)
621 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
622 if (TREE_CODE (decl
) == VAR_DECL
623 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
624 && ! DECL_IN_SYSTEM_HEADER (decl
)
625 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
627 if (! TREE_USED (decl
))
628 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
629 else if (DECL_CONTEXT (decl
) == current_function_decl
630 && TREE_TYPE (decl
) != error_mark_node
631 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
632 && errorcount
== unused_but_set_errorcount
633 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
634 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
636 warning (OPT_Wunused_but_set_variable
,
637 "variable %q+D set but not used", decl
);
638 unused_but_set_errorcount
= errorcount
;
642 /* Remove declarations for all the DECLs in this level. */
643 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
645 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
648 tree name
= DECL_NAME (link
);
652 ob
= outer_binding (name
,
653 IDENTIFIER_BINDING (name
),
656 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
658 ns_binding
= NULL_TREE
;
660 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
661 /* We have something like:
666 and we are leaving the `for' scope. There's no reason to
667 keep the binding of the inner `i' in this case. */
668 pop_binding (name
, link
);
669 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
670 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
671 /* Here, we have something like:
679 We must pop the for-scope binding so we know what's a
680 type and what isn't. */
681 pop_binding (name
, link
);
684 /* Mark this VAR_DECL as dead so that we can tell we left it
685 there only for backward compatibility. */
686 DECL_DEAD_FOR_LOCAL (link
) = 1;
688 /* Keep track of what should have happened when we
689 popped the binding. */
692 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
693 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
696 /* Add it to the list of dead variables in the next
697 outermost binding to that we can remove these when we
698 leave that binding. */
699 VEC_safe_push (tree
, gc
,
700 current_binding_level
->level_chain
->dead_vars_from_for
,
703 /* Although we don't pop the cxx_binding, we do clear
704 its SCOPE since the scope is going away now. */
705 IDENTIFIER_BINDING (name
)->scope
706 = current_binding_level
->level_chain
;
713 /* Remove the binding. */
716 if (TREE_CODE (decl
) == TREE_LIST
)
717 decl
= TREE_VALUE (decl
);
720 if (TREE_CODE (name
) == OVERLOAD
)
721 name
= OVL_FUNCTION (name
);
723 gcc_assert (DECL_P (name
));
724 pop_binding (DECL_NAME (name
), decl
);
728 /* Remove declarations for any `for' variables from inner scopes
729 that we kept around. */
730 FOR_EACH_VEC_ELT_REVERSE (tree
, current_binding_level
->dead_vars_from_for
,
732 pop_binding (DECL_NAME (decl
), decl
);
734 /* Restore the IDENTIFIER_TYPE_VALUEs. */
735 for (link
= current_binding_level
->type_shadowed
;
736 link
; link
= TREE_CHAIN (link
))
737 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
739 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
740 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding
,
741 current_binding_level
->shadowed_labels
,
743 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
745 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
746 list if a `using' declaration put them there. The debugging
747 back ends won't understand OVERLOAD, so we remove them here.
748 Because the BLOCK_VARS are (temporarily) shared with
749 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
750 popped all the bindings. */
755 for (d
= &BLOCK_VARS (block
); *d
; )
757 if (TREE_CODE (*d
) == TREE_LIST
)
758 *d
= TREE_CHAIN (*d
);
760 d
= &DECL_CHAIN (*d
);
764 /* If the level being exited is the top level of a function,
765 check over all the labels. */
768 /* Since this is the top level block of a function, the vars are
769 the function's parameters. Don't leave them in the BLOCK
770 because they are found in the FUNCTION_DECL instead. */
771 BLOCK_VARS (block
) = 0;
775 kind
= current_binding_level
->kind
;
776 if (kind
== sk_cleanup
)
780 /* If this is a temporary binding created for a cleanup, then we'll
781 have pushed a statement list level. Pop that, create a new
782 BIND_EXPR for the block, and insert it into the stream. */
783 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
784 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
791 /* The current function is being defined, so its DECL_INITIAL
792 should be error_mark_node. */
793 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
794 DECL_INITIAL (current_function_decl
) = block
;
797 current_binding_level
->blocks
798 = block_chainon (current_binding_level
->blocks
, block
);
800 /* If we did not make a block for the level just exited,
801 any blocks made for inner levels
802 (since they cannot be recorded as subblocks in that level)
803 must be carried forward so they will later become subblocks
804 of something else. */
806 current_binding_level
->blocks
807 = block_chainon (current_binding_level
->blocks
, subblocks
);
809 /* Each and every BLOCK node created here in `poplevel' is important
810 (e.g. for proper debugging information) so if we created one
811 earlier, mark it as "used". */
813 TREE_USED (block
) = 1;
815 /* All temporary bindings created for cleanups are popped silently. */
816 if (kind
== sk_cleanup
)
819 timevar_stop (TV_NAME_LOOKUP
);
823 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
824 itself, calling F for each. The DATA is passed to F as well. */
827 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
830 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
832 result
|= (*f
) (name_space
, data
);
834 for (; current
; current
= DECL_CHAIN (current
))
835 result
|= walk_namespaces_r (current
, f
, data
);
840 /* Walk all the namespaces, calling F for each. The DATA is passed to
844 walk_namespaces (walk_namespaces_fn f
, void* data
)
846 return walk_namespaces_r (global_namespace
, f
, data
);
849 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
850 DATA is non-NULL, this is the last time we will call
851 wrapup_global_declarations for this NAMESPACE. */
854 wrapup_globals_for_namespace (tree name_space
, void* data
)
856 struct cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
857 VEC(tree
,gc
) *statics
= level
->static_decls
;
858 tree
*vec
= VEC_address (tree
, statics
);
859 int len
= VEC_length (tree
, statics
);
860 int last_time
= (data
!= 0);
864 check_global_declarations (vec
, len
);
865 emit_debug_global_declarations (vec
, len
);
869 /* Write out any globals that need to be output. */
870 return wrapup_global_declarations (vec
, len
);
874 /* In C++, you don't have to write `struct S' to refer to `S'; you
875 can just use `S'. We accomplish this by creating a TYPE_DECL as
876 if the user had written `typedef struct S S'. Create and return
877 the TYPE_DECL for TYPE. */
880 create_implicit_typedef (tree name
, tree type
)
884 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
885 DECL_ARTIFICIAL (decl
) = 1;
886 /* There are other implicit type declarations, like the one *within*
887 a class that allows you to write `S::S'. We must distinguish
889 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
890 TYPE_NAME (type
) = decl
;
891 TYPE_STUB_DECL (type
) = decl
;
896 /* Remember a local name for name-mangling purposes. */
899 push_local_name (tree decl
)
904 timevar_start (TV_NAME_LOOKUP
);
906 name
= DECL_NAME (decl
);
908 nelts
= VEC_length (tree
, local_names
);
909 for (i
= 0; i
< nelts
; i
++)
911 t
= VEC_index (tree
, local_names
, i
);
912 if (DECL_NAME (t
) == name
)
914 if (!DECL_LANG_SPECIFIC (decl
))
915 retrofit_lang_decl (decl
);
916 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
917 if (DECL_LANG_SPECIFIC (t
))
918 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
920 DECL_DISCRIMINATOR (decl
) = 1;
922 VEC_replace (tree
, local_names
, i
, decl
);
923 timevar_stop (TV_NAME_LOOKUP
);
928 VEC_safe_push (tree
, gc
, local_names
, decl
);
929 timevar_stop (TV_NAME_LOOKUP
);
932 /* Subroutine of duplicate_decls: return truthvalue of whether
933 or not types of these decls match.
935 For C++, we must compare the parameter list so that `int' can match
936 `int&' in a parameter position, but `int&' is not confused with
940 decls_match (tree newdecl
, tree olddecl
)
944 if (newdecl
== olddecl
)
947 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
948 /* If the two DECLs are not even the same kind of thing, we're not
949 interested in their types. */
952 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
954 tree f1
= TREE_TYPE (newdecl
);
955 tree f2
= TREE_TYPE (olddecl
);
956 tree p1
= TYPE_ARG_TYPES (f1
);
957 tree p2
= TYPE_ARG_TYPES (f2
);
959 /* Specializations of different templates are different functions
960 even if they have the same type. */
961 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
962 ? DECL_TI_TEMPLATE (newdecl
)
964 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
965 ? DECL_TI_TEMPLATE (olddecl
)
970 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
971 && ! (DECL_EXTERN_C_P (newdecl
)
972 && DECL_EXTERN_C_P (olddecl
)))
975 #ifdef NO_IMPLICIT_EXTERN_C
976 /* A new declaration doesn't match a built-in one unless it
977 is also extern "C". */
978 if (DECL_IS_BUILTIN (olddecl
)
979 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
983 if (TREE_CODE (f1
) != TREE_CODE (f2
))
986 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
988 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
989 && (DECL_BUILT_IN (olddecl
)
990 #ifndef NO_IMPLICIT_EXTERN_C
991 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
992 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
996 types_match
= self_promoting_args_p (p1
);
997 if (p1
== void_list_node
)
998 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1000 #ifndef NO_IMPLICIT_EXTERN_C
1001 else if (!prototype_p (f1
)
1002 && (DECL_EXTERN_C_P (olddecl
)
1003 && DECL_IN_SYSTEM_HEADER (olddecl
)
1004 && !DECL_CLASS_SCOPE_P (olddecl
))
1005 && (DECL_EXTERN_C_P (newdecl
)
1006 && DECL_IN_SYSTEM_HEADER (newdecl
)
1007 && !DECL_CLASS_SCOPE_P (newdecl
)))
1009 types_match
= self_promoting_args_p (p2
);
1010 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1016 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1017 || comp_type_attributes (TREE_TYPE (newdecl
),
1018 TREE_TYPE (olddecl
)) != 0);
1023 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1025 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1026 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1029 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1030 DECL_TEMPLATE_PARMS (olddecl
)))
1033 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1034 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1035 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1037 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1038 DECL_TEMPLATE_RESULT (newdecl
));
1042 /* Need to check scope for variable declaration (VAR_DECL).
1043 For typedef (TYPE_DECL), scope is ignored. */
1044 if (TREE_CODE (newdecl
) == VAR_DECL
1045 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1047 Two declarations for an object with C language linkage
1048 with the same name (ignoring the namespace that qualify
1049 it) that appear in different namespace scopes refer to
1051 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1054 if (TREE_TYPE (newdecl
) == error_mark_node
)
1055 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1056 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1057 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1058 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1061 types_match
= comptypes (TREE_TYPE (newdecl
),
1062 TREE_TYPE (olddecl
),
1063 COMPARE_REDECLARATION
);
1069 /* If NEWDECL is `static' and an `extern' was seen previously,
1070 warn about it. OLDDECL is the previous declaration.
1072 Note that this does not apply to the C++ case of declaring
1073 a variable `extern const' and then later `const'.
1075 Don't complain about built-in functions, since they are beyond
1076 the user's control. */
1079 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1081 if (TREE_CODE (newdecl
) == TYPE_DECL
1082 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1083 || TREE_CODE (newdecl
) == CONST_DECL
1084 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1087 /* Don't get confused by static member functions; that's a different
1089 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1090 && DECL_STATIC_FUNCTION_P (newdecl
))
1093 /* If the old declaration was `static', or the new one isn't, then
1094 everything is OK. */
1095 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1098 /* It's OK to declare a builtin function as `static'. */
1099 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1100 && DECL_ARTIFICIAL (olddecl
))
1103 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1104 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1107 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1108 function templates. If their exception specifications do not
1109 match, issue a diagnostic. */
1112 check_redeclaration_exception_specification (tree new_decl
,
1117 tree new_exceptions
;
1118 tree old_exceptions
;
1120 new_type
= TREE_TYPE (new_decl
);
1121 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1122 old_type
= TREE_TYPE (old_decl
);
1123 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1127 If any declaration of a function has an exception-specification,
1128 all declarations, including the definition and an explicit
1129 specialization, of that function shall have an
1130 exception-specification with the same set of type-ids. */
1131 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1132 && ! DECL_IS_BUILTIN (old_decl
)
1134 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1136 error ("declaration of %qF has a different exception specifier",
1138 error ("from previous declaration %q+F", old_decl
);
1142 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1143 Otherwise issue diagnostics. */
1146 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1148 old_decl
= STRIP_TEMPLATE (old_decl
);
1149 new_decl
= STRIP_TEMPLATE (new_decl
);
1150 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1151 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1153 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1154 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1156 if (TREE_CODE (old_decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (old_decl
))
1158 /* Hide a built-in declaration. */
1159 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1160 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1163 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1164 error ("from previous declaration %q+D", old_decl
);
1168 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1169 && lookup_attribute ("gnu_inline", \
1170 DECL_ATTRIBUTES (fn)))
1172 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1173 If the redeclaration is invalid, a diagnostic is issued, and the
1174 error_mark_node is returned. Otherwise, OLDDECL is returned.
1176 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1179 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1182 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1184 unsigned olddecl_uid
= DECL_UID (olddecl
);
1185 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1186 int new_defines_function
= 0;
1187 tree new_template_info
;
1189 if (newdecl
== olddecl
)
1192 types_match
= decls_match (newdecl
, olddecl
);
1194 /* If either the type of the new decl or the type of the old decl is an
1195 error_mark_node, then that implies that we have already issued an
1196 error (earlier) for some bogus type specification, and in that case,
1197 it is rather pointless to harass the user with yet more error message
1198 about the same declaration, so just pretend the types match here. */
1199 if (TREE_TYPE (newdecl
) == error_mark_node
1200 || TREE_TYPE (olddecl
) == error_mark_node
)
1201 return error_mark_node
;
1203 if (DECL_P (olddecl
)
1204 && TREE_CODE (newdecl
) == FUNCTION_DECL
1205 && TREE_CODE (olddecl
) == FUNCTION_DECL
1206 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1208 if (DECL_DECLARED_INLINE_P (newdecl
)
1209 && DECL_UNINLINABLE (newdecl
)
1210 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1211 /* Already warned elsewhere. */;
1212 else if (DECL_DECLARED_INLINE_P (olddecl
)
1213 && DECL_UNINLINABLE (olddecl
)
1214 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1215 /* Already warned. */;
1216 else if (DECL_DECLARED_INLINE_P (newdecl
)
1217 && DECL_UNINLINABLE (olddecl
)
1218 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1220 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1222 warning (OPT_Wattributes
, "previous declaration of %q+D "
1223 "with attribute noinline", olddecl
);
1225 else if (DECL_DECLARED_INLINE_P (olddecl
)
1226 && DECL_UNINLINABLE (newdecl
)
1227 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1229 warning (OPT_Wattributes
, "function %q+D redeclared with "
1230 "attribute noinline", newdecl
);
1231 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1236 /* Check for redeclaration and other discrepancies. */
1237 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1238 && DECL_ARTIFICIAL (olddecl
))
1240 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1241 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1243 /* Avoid warnings redeclaring built-ins which have not been
1244 explicitly declared. */
1245 if (DECL_ANTICIPATED (olddecl
))
1248 /* If you declare a built-in or predefined function name as static,
1249 the old definition is overridden, but optionally warn this was a
1250 bad choice of name. */
1251 if (! TREE_PUBLIC (newdecl
))
1253 warning (OPT_Wshadow
,
1254 DECL_BUILT_IN (olddecl
)
1255 ? G_("shadowing built-in function %q#D")
1256 : G_("shadowing library function %q#D"), olddecl
);
1257 /* Discard the old built-in function. */
1260 /* If the built-in is not ansi, then programs can override
1261 it even globally without an error. */
1262 else if (! DECL_BUILT_IN (olddecl
))
1263 warning (0, "library function %q#D redeclared as non-function %q#D",
1267 error ("declaration of %q#D", newdecl
);
1268 error ("conflicts with built-in declaration %q#D",
1273 else if (!types_match
)
1275 /* Avoid warnings redeclaring built-ins which have not been
1276 explicitly declared. */
1277 if (DECL_ANTICIPATED (olddecl
))
1279 /* Deal with fileptr_type_node. FILE type is not known
1280 at the time we create the builtins. */
1283 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1284 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1286 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1289 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1291 tree t
= TREE_VALUE (t1
);
1293 if (TREE_CODE (t
) == POINTER_TYPE
1294 && TYPE_NAME (TREE_TYPE (t
))
1295 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1296 == get_identifier ("FILE")
1297 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1299 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1301 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1302 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1303 types_match
= decls_match (newdecl
, olddecl
);
1305 return duplicate_decls (newdecl
, olddecl
,
1307 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1310 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1313 else if ((DECL_EXTERN_C_P (newdecl
)
1314 && DECL_EXTERN_C_P (olddecl
))
1315 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1316 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1318 /* A near match; override the builtin. */
1320 if (TREE_PUBLIC (newdecl
))
1322 warning (0, "new declaration %q#D", newdecl
);
1323 warning (0, "ambiguates built-in declaration %q#D",
1327 warning (OPT_Wshadow
,
1328 DECL_BUILT_IN (olddecl
)
1329 ? G_("shadowing built-in function %q#D")
1330 : G_("shadowing library function %q#D"), olddecl
);
1333 /* Discard the old built-in function. */
1336 /* Replace the old RTL to avoid problems with inlining. */
1337 COPY_DECL_RTL (newdecl
, olddecl
);
1339 /* Even if the types match, prefer the new declarations type for
1340 built-ins which have not been explicitly declared, for
1341 exception lists, etc... */
1342 else if (DECL_IS_BUILTIN (olddecl
))
1344 tree type
= TREE_TYPE (newdecl
);
1345 tree attribs
= (*targetm
.merge_type_attributes
)
1346 (TREE_TYPE (olddecl
), type
);
1348 type
= cp_build_type_attribute_variant (type
, attribs
);
1349 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1352 /* If a function is explicitly declared "throw ()", propagate that to
1353 the corresponding builtin. */
1354 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1355 && DECL_ANTICIPATED (olddecl
)
1356 && TREE_NOTHROW (newdecl
)
1357 && !TREE_NOTHROW (olddecl
)
1358 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != NULL_TREE
1359 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != olddecl
1361 TREE_NOTHROW (built_in_decls
[DECL_FUNCTION_CODE (olddecl
)]) = 1;
1363 /* Whether or not the builtin can throw exceptions has no
1364 bearing on this declarator. */
1365 TREE_NOTHROW (olddecl
) = 0;
1367 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1369 /* If a builtin function is redeclared as `static', merge
1370 the declarations, but make the original one static. */
1371 DECL_THIS_STATIC (olddecl
) = 1;
1372 TREE_PUBLIC (olddecl
) = 0;
1374 /* Make the old declaration consistent with the new one so
1375 that all remnants of the builtin-ness of this function
1376 will be banished. */
1377 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1378 COPY_DECL_RTL (newdecl
, olddecl
);
1381 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1383 /* C++ Standard, 3.3, clause 4:
1384 "[Note: a namespace name or a class template name must be unique
1385 in its declarative region (7.3.2, clause 14). ]" */
1386 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1387 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1388 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1389 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1390 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1391 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1393 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1394 && TREE_CODE (newdecl
) != TYPE_DECL
)
1395 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1396 && TREE_CODE (olddecl
) != TYPE_DECL
))
1398 /* We do nothing special here, because C++ does such nasty
1399 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1400 get shadowed, and know that if we need to find a TYPE_DECL
1401 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1402 slot of the identifier. */
1406 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1407 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1408 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1409 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1413 error ("%q#D redeclared as different kind of symbol", newdecl
);
1414 if (TREE_CODE (olddecl
) == TREE_LIST
)
1415 olddecl
= TREE_VALUE (olddecl
);
1416 error ("previous declaration of %q+#D", olddecl
);
1418 return error_mark_node
;
1420 else if (!types_match
)
1422 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1423 /* These are certainly not duplicate declarations; they're
1424 from different scopes. */
1427 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1429 /* The name of a class template may not be declared to refer to
1430 any other template, class, function, object, namespace, value,
1431 or type in the same scope. */
1432 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1433 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1435 error ("declaration of template %q#D", newdecl
);
1436 error ("conflicts with previous declaration %q+#D", olddecl
);
1438 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1439 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1440 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1441 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1442 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1443 DECL_TEMPLATE_PARMS (olddecl
))
1444 /* Template functions can be disambiguated by
1446 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1447 TREE_TYPE (TREE_TYPE (olddecl
))))
1449 error ("new declaration %q#D", newdecl
);
1450 error ("ambiguates old declaration %q+#D", olddecl
);
1454 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1456 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1458 error ("declaration of C function %q#D conflicts with",
1460 error ("previous declaration %q+#D here", olddecl
);
1463 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1464 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1466 error ("new declaration %q#D", newdecl
);
1467 error ("ambiguates old declaration %q+#D", olddecl
);
1468 return error_mark_node
;
1475 error ("conflicting declaration %q#D", newdecl
);
1476 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1477 return error_mark_node
;
1480 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1481 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1482 && (!DECL_TEMPLATE_INFO (newdecl
)
1483 || (DECL_TI_TEMPLATE (newdecl
)
1484 != DECL_TI_TEMPLATE (olddecl
))))
1485 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1486 && (!DECL_TEMPLATE_INFO (olddecl
)
1487 || (DECL_TI_TEMPLATE (olddecl
)
1488 != DECL_TI_TEMPLATE (newdecl
))))))
1489 /* It's OK to have a template specialization and a non-template
1490 with the same type, or to have specializations of two
1491 different templates with the same type. Note that if one is a
1492 specialization, and the other is an instantiation of the same
1493 template, that we do not exit at this point. That situation
1494 can occur if we instantiate a template class, and then
1495 specialize one of its methods. This situation is valid, but
1496 the declarations must be merged in the usual way. */
1498 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1499 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1500 && !DECL_USE_TEMPLATE (newdecl
))
1501 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1502 && !DECL_USE_TEMPLATE (olddecl
))))
1503 /* One of the declarations is a template instantiation, and the
1504 other is not a template at all. That's OK. */
1506 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1508 /* In [namespace.alias] we have:
1510 In a declarative region, a namespace-alias-definition can be
1511 used to redefine a namespace-alias declared in that declarative
1512 region to refer only to the namespace to which it already
1515 Therefore, if we encounter a second alias directive for the same
1516 alias, we can just ignore the second directive. */
1517 if (DECL_NAMESPACE_ALIAS (newdecl
)
1518 && (DECL_NAMESPACE_ALIAS (newdecl
)
1519 == DECL_NAMESPACE_ALIAS (olddecl
)))
1521 /* [namespace.alias]
1523 A namespace-name or namespace-alias shall not be declared as
1524 the name of any other entity in the same declarative region.
1525 A namespace-name defined at global scope shall not be
1526 declared as the name of any other entity in any global scope
1528 error ("declaration of namespace %qD conflicts with", newdecl
);
1529 error ("previous declaration of namespace %q+D here", olddecl
);
1530 return error_mark_node
;
1534 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1537 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1538 if (DECL_NAME (olddecl
) != NULL_TREE
)
1539 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1540 ? "%q+#D previously defined here"
1541 : "%q+#D previously declared here", olddecl
);
1542 return error_mark_node
;
1544 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1545 && DECL_INITIAL (olddecl
) != NULL_TREE
1546 && !prototype_p (TREE_TYPE (olddecl
))
1547 && prototype_p (TREE_TYPE (newdecl
)))
1549 /* Prototype decl follows defn w/o prototype. */
1550 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1551 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1552 "follows non-prototype definition here");
1554 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1555 || TREE_CODE (olddecl
) == VAR_DECL
)
1556 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1559 If two declarations of the same function or object
1560 specify different linkage-specifications ..., the program
1561 is ill-formed.... Except for functions with C++ linkage,
1562 a function declaration without a linkage specification
1563 shall not precede the first linkage specification for
1564 that function. A function can be declared without a
1565 linkage specification after an explicit linkage
1566 specification has been seen; the linkage explicitly
1567 specified in the earlier declaration is not affected by
1568 such a function declaration.
1570 DR 563 raises the question why the restrictions on
1571 functions should not also apply to objects. Older
1572 versions of G++ silently ignore the linkage-specification
1580 which is clearly wrong. Therefore, we now treat objects
1582 if (current_lang_depth () == 0)
1584 /* There is no explicit linkage-specification, so we use
1585 the linkage from the previous declaration. */
1586 if (!DECL_LANG_SPECIFIC (newdecl
))
1587 retrofit_lang_decl (newdecl
);
1588 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1592 error ("previous declaration of %q+#D with %qL linkage",
1593 olddecl
, DECL_LANGUAGE (olddecl
));
1594 error ("conflicts with new declaration with %qL linkage",
1595 DECL_LANGUAGE (newdecl
));
1599 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1601 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1603 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1604 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1607 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1608 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1610 for (; t1
&& t1
!= void_list_node
;
1611 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1612 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1614 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1617 permerror (input_location
, "default argument given for parameter %d of %q#D",
1619 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1623 error ("default argument given for parameter %d of %q#D",
1625 error ("after previous specification in %q+#D",
1632 /* Do not merge an implicit typedef with an explicit one. In:
1636 typedef class A A __attribute__ ((foo));
1638 the attribute should apply only to the typedef. */
1639 if (TREE_CODE (olddecl
) == TYPE_DECL
1640 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1641 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1644 /* If new decl is `static' and an `extern' was seen previously,
1646 warn_extern_redeclared_static (newdecl
, olddecl
);
1648 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1649 return error_mark_node
;
1651 /* We have committed to returning 1 at this point. */
1652 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1654 /* Now that functions must hold information normally held
1655 by field decls, there is extra work to do so that
1656 declaration information does not get destroyed during
1658 if (DECL_VINDEX (olddecl
))
1659 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1660 if (DECL_CONTEXT (olddecl
))
1661 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1662 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1663 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1664 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1665 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1666 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1667 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1668 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1669 SET_OVERLOADED_OPERATOR_CODE
1670 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1671 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1673 /* Optionally warn about more than one declaration for the same
1674 name, but don't warn about a function declaration followed by a
1676 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1677 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1678 /* Don't warn about extern decl followed by definition. */
1679 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1680 /* Don't warn about friends, let add_friend take care of it. */
1681 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
)))
1683 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1684 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1687 if (DECL_DELETED_FN (newdecl
))
1689 error ("deleted definition of %qD", newdecl
);
1690 error ("after previous declaration %q+D", olddecl
);
1692 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1695 /* Deal with C++: must preserve virtual function table size. */
1696 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1698 tree newtype
= TREE_TYPE (newdecl
);
1699 tree oldtype
= TREE_TYPE (olddecl
);
1701 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1702 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1703 CLASSTYPE_FRIEND_CLASSES (newtype
)
1704 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1706 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1709 /* Copy all the DECL_... slots specified in the new decl
1710 except for any that we copy here from the old type. */
1711 DECL_ATTRIBUTES (newdecl
)
1712 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1714 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1718 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1719 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1720 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1721 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1722 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1723 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1725 DECL_ATTRIBUTES (old_result
)
1726 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1728 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1730 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1731 && DECL_INITIAL (new_result
))
1733 if (DECL_INITIAL (old_result
))
1734 DECL_UNINLINABLE (old_result
) = 1;
1736 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1737 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1738 DECL_NOT_REALLY_EXTERN (old_result
)
1739 = DECL_NOT_REALLY_EXTERN (new_result
);
1740 DECL_INTERFACE_KNOWN (old_result
)
1741 = DECL_INTERFACE_KNOWN (new_result
);
1742 DECL_DECLARED_INLINE_P (old_result
)
1743 = DECL_DECLARED_INLINE_P (new_result
);
1744 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1745 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1750 DECL_DECLARED_INLINE_P (old_result
)
1751 |= DECL_DECLARED_INLINE_P (new_result
);
1752 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1753 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1754 check_redeclaration_exception_specification (newdecl
, olddecl
);
1758 /* If the new declaration is a definition, update the file and
1759 line information on the declaration, and also make
1760 the old declaration the same definition. */
1761 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1763 DECL_SOURCE_LOCATION (olddecl
)
1764 = DECL_SOURCE_LOCATION (old_result
)
1765 = DECL_SOURCE_LOCATION (newdecl
);
1766 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1767 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1770 DECL_ARGUMENTS (old_result
)
1771 = DECL_ARGUMENTS (new_result
);
1772 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1773 parm
= DECL_CHAIN (parm
))
1774 DECL_CONTEXT (parm
) = old_result
;
1783 /* Automatically handles default parameters. */
1784 tree oldtype
= TREE_TYPE (olddecl
);
1787 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1788 maybe_instantiate_noexcept (olddecl
);
1790 /* Merge the data types specified in the two decls. */
1791 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1793 /* If merge_types produces a non-typedef type, just use the old type. */
1794 if (TREE_CODE (newdecl
) == TYPE_DECL
1795 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1798 if (TREE_CODE (newdecl
) == VAR_DECL
)
1800 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1801 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1802 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1803 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1804 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1805 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1807 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1808 if (DECL_LANG_SPECIFIC (olddecl
)
1809 && CP_DECL_THREADPRIVATE_P (olddecl
))
1811 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1812 if (!DECL_LANG_SPECIFIC (newdecl
))
1813 retrofit_lang_decl (newdecl
);
1815 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1816 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1820 /* Do this after calling `merge_types' so that default
1821 parameters don't confuse us. */
1822 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1823 check_redeclaration_exception_specification (newdecl
, olddecl
);
1824 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1826 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1827 check_default_args (newdecl
);
1829 /* Lay the type out, unless already done. */
1830 if (! same_type_p (newtype
, oldtype
)
1831 && TREE_TYPE (newdecl
) != error_mark_node
1832 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1833 layout_type (TREE_TYPE (newdecl
));
1835 if ((TREE_CODE (newdecl
) == VAR_DECL
1836 || TREE_CODE (newdecl
) == PARM_DECL
1837 || TREE_CODE (newdecl
) == RESULT_DECL
1838 || TREE_CODE (newdecl
) == FIELD_DECL
1839 || TREE_CODE (newdecl
) == TYPE_DECL
)
1840 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1841 layout_decl (newdecl
, 0);
1843 /* Merge the type qualifiers. */
1844 if (TREE_READONLY (newdecl
))
1845 TREE_READONLY (olddecl
) = 1;
1846 if (TREE_THIS_VOLATILE (newdecl
))
1847 TREE_THIS_VOLATILE (olddecl
) = 1;
1848 if (TREE_NOTHROW (newdecl
))
1849 TREE_NOTHROW (olddecl
) = 1;
1851 /* Merge deprecatedness. */
1852 if (TREE_DEPRECATED (newdecl
))
1853 TREE_DEPRECATED (olddecl
) = 1;
1855 /* Preserve function specific target and optimization options */
1856 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1858 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1859 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1860 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1861 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1863 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1864 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1865 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1866 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1869 /* Merge the initialization information. */
1870 if (DECL_INITIAL (newdecl
) == NULL_TREE
1871 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1873 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1874 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1875 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1877 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1878 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1882 /* Merge the section attribute.
1883 We want to issue an error if the sections conflict but that must be
1884 done later in decl_attributes since we are called before attributes
1886 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1887 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1889 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1891 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1892 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1893 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1894 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1895 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1896 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1897 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1898 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1899 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1900 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1901 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1902 /* Keep the old RTL. */
1903 COPY_DECL_RTL (olddecl
, newdecl
);
1905 else if (TREE_CODE (newdecl
) == VAR_DECL
1906 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1908 /* Keep the old RTL. We cannot keep the old RTL if the old
1909 declaration was for an incomplete object and the new
1910 declaration is not since many attributes of the RTL will
1912 COPY_DECL_RTL (olddecl
, newdecl
);
1915 /* If cannot merge, then use the new type and qualifiers,
1916 and don't preserve the old rtl. */
1919 /* Clean out any memory we had of the old declaration. */
1920 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1922 TREE_VALUE (oldstatic
) = error_mark_node
;
1924 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1925 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1926 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1927 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1930 /* Merge the storage class information. */
1931 merge_weak (newdecl
, olddecl
);
1933 if (DECL_ONE_ONLY (olddecl
))
1934 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
1936 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1937 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1938 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1939 if (! DECL_EXTERNAL (olddecl
))
1940 DECL_EXTERNAL (newdecl
) = 0;
1942 new_template_info
= NULL_TREE
;
1943 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1945 bool new_redefines_gnu_inline
= false;
1947 if (new_defines_function
1948 && ((DECL_INTERFACE_KNOWN (olddecl
)
1949 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1950 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1951 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1952 == FUNCTION_DECL
))))
1956 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1957 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1959 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1962 if (!new_redefines_gnu_inline
)
1964 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1965 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1966 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1968 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1969 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1970 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
1972 /* If the OLDDECL is an instantiation and/or specialization,
1973 then the NEWDECL must be too. But, it may not yet be marked
1974 as such if the caller has created NEWDECL, but has not yet
1975 figured out that it is a redeclaration. */
1976 if (!DECL_USE_TEMPLATE (newdecl
))
1977 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
1979 /* Don't really know how much of the language-specific
1980 values we should copy from old to new. */
1981 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1982 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1983 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1984 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1986 if (LANG_DECL_HAS_MIN (newdecl
))
1988 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
1989 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
1990 if (DECL_TEMPLATE_INFO (newdecl
))
1991 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
1992 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1994 /* Only functions have these fields. */
1995 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1996 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1998 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1999 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2000 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2001 && DECL_HIDDEN_FRIEND_P (olddecl
)
2002 && newdecl_is_friend
);
2003 DECL_BEFRIENDING_CLASSES (newdecl
)
2004 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2005 DECL_BEFRIENDING_CLASSES (olddecl
));
2006 /* DECL_THUNKS is only valid for virtual functions,
2007 otherwise it is a DECL_FRIEND_CONTEXT. */
2008 if (DECL_VIRTUAL_P (newdecl
))
2009 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
2011 /* Only variables have this field. */
2012 else if (TREE_CODE (newdecl
) == VAR_DECL
2013 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2014 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2017 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2021 /* Merge parameter attributes. */
2022 tree oldarg
, newarg
;
2023 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2024 newarg
= DECL_ARGUMENTS(newdecl
);
2026 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2027 DECL_ATTRIBUTES (newarg
)
2028 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2029 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2032 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2033 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2035 /* If newdecl is not a specialization, then it is not a
2036 template-related function at all. And that means that we
2037 should have exited above, returning 0. */
2038 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2040 if (DECL_ODR_USED (olddecl
))
2041 /* From [temp.expl.spec]:
2043 If a template, a member template or the member of a class
2044 template is explicitly specialized then that
2045 specialization shall be declared before the first use of
2046 that specialization that would cause an implicit
2047 instantiation to take place, in every translation unit in
2048 which such a use occurs. */
2049 error ("explicit specialization of %qD after first use",
2052 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2054 /* Don't propagate visibility from the template to the
2055 specialization here. We'll do that in determine_visibility if
2057 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2059 /* [temp.expl.spec/14] We don't inline explicit specialization
2060 just because the primary template says so. */
2062 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2063 the always_inline attribute. */
2064 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2065 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2067 if (DECL_DECLARED_INLINE_P (newdecl
))
2068 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2070 DECL_ATTRIBUTES (newdecl
)
2071 = remove_attribute ("always_inline",
2072 DECL_ATTRIBUTES (newdecl
));
2075 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2077 /* Never inline re-defined extern inline functions.
2078 FIXME: this could be better handled by keeping both
2079 function as separate declarations. */
2080 DECL_UNINLINABLE (newdecl
) = 1;
2084 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2085 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2087 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2089 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2090 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2092 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2093 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2094 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2095 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2098 /* Preserve abstractness on cloned [cd]tors. */
2099 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2101 /* Update newdecl's parms to point at olddecl. */
2102 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2103 parm
= DECL_CHAIN (parm
))
2104 DECL_CONTEXT (parm
) = olddecl
;
2108 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2109 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2110 COPY_DECL_RTL (newdecl
, olddecl
);
2112 if (! types_match
|| new_defines_function
)
2114 /* These need to be copied so that the names are available.
2115 Note that if the types do match, we'll preserve inline
2116 info and other bits, but if not, we won't. */
2117 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2118 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2120 if (new_defines_function
)
2121 /* If defining a function declared with other language
2122 linkage, use the previously declared language linkage. */
2123 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2124 else if (types_match
)
2126 /* If redeclaring a builtin function, and not a definition,
2127 it stays built in. */
2128 if (DECL_BUILT_IN (olddecl
))
2130 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2131 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2132 /* If we're keeping the built-in definition, keep the rtl,
2133 regardless of declaration matches. */
2134 COPY_DECL_RTL (olddecl
, newdecl
);
2137 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2138 /* Don't clear out the arguments if we're just redeclaring a
2140 if (DECL_ARGUMENTS (olddecl
))
2141 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2144 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2145 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2147 /* Now preserve various other info from the definition. */
2148 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2149 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2150 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2151 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2153 /* Warn about conflicting visibility specifications. */
2154 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2155 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2156 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2158 warning_at (input_location
, OPT_Wattributes
,
2159 "%q+D: visibility attribute ignored because it", newdecl
);
2160 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2161 "conflicts with previous declaration here");
2163 /* Choose the declaration which specified visibility. */
2164 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2166 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2167 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2169 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2170 so keep this behavior. */
2171 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2173 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2174 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2176 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2177 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2178 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2179 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2181 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2182 with that from NEWDECL below. */
2183 if (DECL_LANG_SPECIFIC (olddecl
))
2185 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2186 != DECL_LANG_SPECIFIC (newdecl
));
2187 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2190 /* Merge the USED information. */
2191 if (TREE_USED (olddecl
))
2192 TREE_USED (newdecl
) = 1;
2193 else if (TREE_USED (newdecl
))
2194 TREE_USED (olddecl
) = 1;
2195 if (TREE_CODE (newdecl
) == VAR_DECL
)
2197 if (DECL_READ_P (olddecl
))
2198 DECL_READ_P (newdecl
) = 1;
2199 else if (DECL_READ_P (newdecl
))
2200 DECL_READ_P (olddecl
) = 1;
2202 if (DECL_PRESERVE_P (olddecl
))
2203 DECL_PRESERVE_P (newdecl
) = 1;
2204 else if (DECL_PRESERVE_P (newdecl
))
2205 DECL_PRESERVE_P (olddecl
) = 1;
2207 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2211 function_size
= sizeof (struct tree_decl_common
);
2213 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2214 (char *) newdecl
+ sizeof (struct tree_common
),
2215 function_size
- sizeof (struct tree_common
));
2217 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2218 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2219 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2220 if (new_template_info
)
2221 /* If newdecl is a template instantiation, it is possible that
2222 the following sequence of events has occurred:
2224 o A friend function was declared in a class template. The
2225 class template was instantiated.
2227 o The instantiation of the friend declaration was
2228 recorded on the instantiation list, and is newdecl.
2230 o Later, however, instantiate_class_template called pushdecl
2231 on the newdecl to perform name injection. But, pushdecl in
2232 turn called duplicate_decls when it discovered that another
2233 declaration of a global function with the same name already
2236 o Here, in duplicate_decls, we decided to clobber newdecl.
2238 If we're going to do that, we'd better make sure that
2239 olddecl, and not newdecl, is on the list of
2240 instantiations so that if we try to do the instantiation
2241 again we won't get the clobbered declaration. */
2242 reregister_specialization (newdecl
,
2248 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2249 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2250 (char *) newdecl
+ sizeof (struct tree_common
),
2251 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2252 switch (TREE_CODE (olddecl
))
2262 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2263 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2264 size
- sizeof (struct tree_decl_common
)
2265 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2269 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2270 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2271 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2272 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2276 DECL_UID (olddecl
) = olddecl_uid
;
2278 DECL_FRIEND_P (olddecl
) = 1;
2281 DECL_ANTICIPATED (olddecl
) = 1;
2282 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2285 /* NEWDECL contains the merged attribute lists.
2286 Update OLDDECL to be the same. */
2287 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2289 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2290 so that encode_section_info has a chance to look at the new decl
2291 flags and attributes. */
2292 if (DECL_RTL_SET_P (olddecl
)
2293 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2294 || (TREE_CODE (olddecl
) == VAR_DECL
2295 && TREE_STATIC (olddecl
))))
2296 make_decl_rtl (olddecl
);
2298 /* The NEWDECL will no longer be needed. Because every out-of-class
2299 declaration of a member results in a call to duplicate_decls,
2300 freeing these nodes represents in a significant savings. */
2306 /* Return zero if the declaration NEWDECL is valid
2307 when the declaration OLDDECL (assumed to be for the same name)
2308 has already been seen.
2309 Otherwise return an error message format string with a %s
2310 where the identifier should go. */
2313 redeclaration_error_message (tree newdecl
, tree olddecl
)
2315 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2317 /* Because C++ can put things into name space for free,
2318 constructs like "typedef struct foo { ... } foo"
2319 would look like an erroneous redeclaration. */
2320 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2323 return G_("redefinition of %q#D");
2325 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2327 /* If this is a pure function, its olddecl will actually be
2328 the original initialization to `0' (which we force to call
2329 abort()). Don't complain about redefinition in this case. */
2330 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2331 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2334 /* If both functions come from different namespaces, this is not
2335 a redeclaration - this is a conflict with a used function. */
2336 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2337 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2338 && ! decls_match (olddecl
, newdecl
))
2339 return G_("%qD conflicts with used function");
2341 /* We'll complain about linkage mismatches in
2342 warn_extern_redeclared_static. */
2344 /* Defining the same name twice is no good. */
2345 if (DECL_INITIAL (olddecl
) != NULL_TREE
2346 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2348 if (DECL_NAME (olddecl
) == NULL_TREE
)
2349 return G_("%q#D not declared in class");
2350 else if (!GNU_INLINE_P (olddecl
)
2351 || GNU_INLINE_P (newdecl
))
2352 return G_("redefinition of %q#D");
2355 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2357 bool olda
= GNU_INLINE_P (olddecl
);
2358 bool newa
= GNU_INLINE_P (newdecl
);
2363 return G_("%q+D redeclared inline with "
2364 "%<gnu_inline%> attribute");
2366 return G_("%q+D redeclared inline without "
2367 "%<gnu_inline%> attribute");
2373 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2377 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2379 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2380 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2381 return G_("redefinition of %q#D");
2385 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2386 || (DECL_TEMPLATE_RESULT (newdecl
)
2387 == DECL_TEMPLATE_RESULT (olddecl
)))
2390 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2391 if (DECL_TEMPLATE_INFO (nt
))
2392 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2393 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2394 if (DECL_TEMPLATE_INFO (ot
))
2395 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2396 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2397 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2398 return G_("redefinition of %q#D");
2400 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2402 bool olda
= GNU_INLINE_P (ot
);
2403 bool newa
= GNU_INLINE_P (nt
);
2408 return G_("%q+D redeclared inline with "
2409 "%<gnu_inline%> attribute");
2411 return G_("%q+D redeclared inline without "
2412 "%<gnu_inline%> attribute");
2416 /* Core issue #226 (C++0x):
2418 If a friend function template declaration specifies a
2419 default template-argument, that declaration shall be a
2420 definition and shall be the only declaration of the
2421 function template in the translation unit. */
2422 if ((cxx_dialect
!= cxx98
)
2423 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2424 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2425 /*is_primary=*/1, /*is_partial=*/0,
2426 /*is_friend_decl=*/2))
2427 return G_("redeclaration of friend %q#D "
2428 "may not have default template arguments");
2432 else if (TREE_CODE (newdecl
) == VAR_DECL
2433 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2434 && (! DECL_LANG_SPECIFIC (olddecl
)
2435 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2436 || DECL_THREAD_LOCAL_P (newdecl
)))
2438 /* Only variables can be thread-local, and all declarations must
2439 agree on this property. */
2440 if (DECL_THREAD_LOCAL_P (newdecl
))
2441 return G_("thread-local declaration of %q#D follows "
2442 "non-thread-local declaration");
2444 return G_("non-thread-local declaration of %q#D follows "
2445 "thread-local declaration");
2447 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2449 /* The objects have been declared at namespace scope. If either
2450 is a member of an anonymous union, then this is an invalid
2451 redeclaration. For example:
2457 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2458 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2459 return G_("redeclaration of %q#D");
2460 /* If at least one declaration is a reference, there is no
2461 conflict. For example:
2467 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2469 /* Reject two definitions. */
2470 return G_("redefinition of %q#D");
2474 /* Objects declared with block scope: */
2475 /* Reject two definitions, and reject a definition
2476 together with an external reference. */
2477 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2478 return G_("redeclaration of %q#D");
2483 /* Hash and equality functions for the named_label table. */
2486 named_label_entry_hash (const void *data
)
2488 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2489 return DECL_UID (ent
->label_decl
);
2493 named_label_entry_eq (const void *a
, const void *b
)
2495 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2496 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2497 return ent_a
->label_decl
== ent_b
->label_decl
;
2500 /* Create a new label, named ID. */
2503 make_label_decl (tree id
, int local_p
)
2505 struct named_label_entry
*ent
;
2509 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2511 DECL_CONTEXT (decl
) = current_function_decl
;
2512 DECL_MODE (decl
) = VOIDmode
;
2513 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2515 /* Say where one reference is to the label, for the sake of the
2516 error if it is not defined. */
2517 DECL_SOURCE_LOCATION (decl
) = input_location
;
2519 /* Record the fact that this identifier is bound to this label. */
2520 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2522 /* Create the label htab for the function on demand. */
2524 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2525 named_label_entry_eq
, NULL
);
2527 /* Record this label on the list of labels used in this function.
2528 We do this before calling make_label_decl so that we get the
2529 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2530 ent
= ggc_alloc_cleared_named_label_entry ();
2531 ent
->label_decl
= decl
;
2533 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2534 gcc_assert (*slot
== NULL
);
2540 /* Look for a label named ID in the current function. If one cannot
2541 be found, create one. (We keep track of used, but undefined,
2542 labels, and complain about them at the end of a function.) */
2545 lookup_label_1 (tree id
)
2549 /* You can't use labels at global scope. */
2550 if (current_function_decl
== NULL_TREE
)
2552 error ("label %qE referenced outside of any function", id
);
2556 /* See if we've already got this label. */
2557 decl
= IDENTIFIER_LABEL_VALUE (id
);
2558 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2561 decl
= make_label_decl (id
, /*local_p=*/0);
2565 /* Wrapper for lookup_label_1. */
2568 lookup_label (tree id
)
2571 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2572 ret
= lookup_label_1 (id
);
2573 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2577 /* Declare a local label named ID. */
2580 declare_local_label (tree id
)
2583 cp_label_binding
*bind
;
2585 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2586 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2587 bind
= VEC_safe_push (cp_label_binding
, gc
,
2588 current_binding_level
->shadowed_labels
, NULL
);
2589 bind
->prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2591 decl
= make_label_decl (id
, /*local_p=*/1);
2597 /* Returns nonzero if it is ill-formed to jump past the declaration of
2598 DECL. Returns 2 if it's also a real problem. */
2601 decl_jump_unsafe (tree decl
)
2603 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2604 with automatic storage duration is not in scope to a point where it is
2605 in scope is ill-formed unless the variable has scalar type, class type
2606 with a trivial default constructor and a trivial destructor, a
2607 cv-qualified version of one of these types, or an array of one of the
2608 preceding types and is declared without an initializer (8.5). */
2609 tree type
= TREE_TYPE (decl
);
2611 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2612 || type
== error_mark_node
)
2615 type
= strip_array_types (type
);
2617 if (type_has_nontrivial_default_init (TREE_TYPE (decl
))
2618 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2621 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2627 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2630 identify_goto (tree decl
, const location_t
*locus
)
2633 permerror (input_location
, "jump to label %qD", decl
);
2635 permerror (input_location
, "jump to case label");
2637 permerror (*locus
, " from here");
2640 /* Check that a single previously seen jump to a newly defined label
2641 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2642 the jump context; NAMES are the names in scope in LEVEL at the jump
2643 context; LOCUS is the source position of the jump or 0. Returns
2644 true if all is well. */
2647 check_previous_goto_1 (tree decl
, struct cp_binding_level
* level
, tree names
,
2648 bool exited_omp
, const location_t
*locus
)
2650 struct cp_binding_level
*b
;
2651 bool identified
= false, saw_eh
= false, saw_omp
= false;
2655 identify_goto (decl
, locus
);
2656 error (" exits OpenMP structured block");
2657 identified
= saw_omp
= true;
2660 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2662 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2664 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2665 new_decls
= DECL_CHAIN (new_decls
))
2667 int problem
= decl_jump_unsafe (new_decls
);
2673 identify_goto (decl
, locus
);
2677 error (" crosses initialization of %q+#D", new_decls
);
2679 permerror (input_location
, " enters scope of %q+#D which has "
2680 "non-trivial destructor", new_decls
);
2685 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2689 identify_goto (decl
, locus
);
2692 if (b
->kind
== sk_try
)
2693 error (" enters try block");
2695 error (" enters catch block");
2698 if (b
->kind
== sk_omp
&& !saw_omp
)
2702 identify_goto (decl
, locus
);
2705 error (" enters OpenMP structured block");
2714 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2716 check_previous_goto_1 (decl
, use
->binding_level
,
2717 use
->names_in_scope
, use
->in_omp_scope
,
2718 &use
->o_goto_locus
);
2722 check_switch_goto (struct cp_binding_level
* level
)
2724 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2727 /* Check that a new jump to a label DECL is OK. Called by
2728 finish_goto_stmt. */
2731 check_goto (tree decl
)
2733 struct named_label_entry
*ent
, dummy
;
2734 bool saw_catch
= false, identified
= false;
2738 /* We can't know where a computed goto is jumping.
2739 So we assume that it's OK. */
2740 if (TREE_CODE (decl
) != LABEL_DECL
)
2743 /* We didn't record any information about this label when we created it,
2744 and there's not much point since it's trivial to analyze as a return. */
2745 if (decl
== cdtor_label
)
2748 dummy
.label_decl
= decl
;
2749 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2750 gcc_assert (ent
!= NULL
);
2752 /* If the label hasn't been defined yet, defer checking. */
2753 if (! DECL_INITIAL (decl
))
2755 struct named_label_use_entry
*new_use
;
2757 /* Don't bother creating another use if the last goto had the
2758 same data, and will therefore create the same set of errors. */
2760 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2763 new_use
= ggc_alloc_named_label_use_entry ();
2764 new_use
->binding_level
= current_binding_level
;
2765 new_use
->names_in_scope
= current_binding_level
->names
;
2766 new_use
->o_goto_locus
= input_location
;
2767 new_use
->in_omp_scope
= false;
2769 new_use
->next
= ent
->uses
;
2770 ent
->uses
= new_use
;
2774 if (ent
->in_try_scope
|| ent
->in_catch_scope
2775 || ent
->in_omp_scope
|| !VEC_empty (tree
, ent
->bad_decls
))
2777 permerror (input_location
, "jump to label %q+D", decl
);
2778 permerror (input_location
, " from here");
2782 FOR_EACH_VEC_ELT (tree
, ent
->bad_decls
, ix
, bad
)
2784 int u
= decl_jump_unsafe (bad
);
2786 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2788 /* Can't skip init of __exception_info. */
2789 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2793 error (" skips initialization of %q+#D", bad
);
2795 permerror (input_location
, " enters scope of %q+#D which has "
2796 "non-trivial destructor", bad
);
2799 if (ent
->in_try_scope
)
2800 error (" enters try block");
2801 else if (ent
->in_catch_scope
&& !saw_catch
)
2802 error (" enters catch block");
2804 if (ent
->in_omp_scope
)
2805 error (" enters OpenMP structured block");
2806 else if (flag_openmp
)
2808 struct cp_binding_level
*b
;
2809 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2811 if (b
== ent
->binding_level
)
2813 if (b
->kind
== sk_omp
)
2817 permerror (input_location
, "jump to label %q+D", decl
);
2818 permerror (input_location
, " from here");
2821 error (" exits OpenMP structured block");
2828 /* Check that a return is ok wrt OpenMP structured blocks.
2829 Called by finish_return_stmt. Returns true if all is well. */
2832 check_omp_return (void)
2834 struct cp_binding_level
*b
;
2835 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2836 if (b
->kind
== sk_omp
)
2838 error ("invalid exit from OpenMP structured block");
2841 else if (b
->kind
== sk_function_parms
)
2846 /* Define a label, specifying the location in the source file.
2847 Return the LABEL_DECL node for the label. */
2850 define_label_1 (location_t location
, tree name
)
2852 struct named_label_entry
*ent
, dummy
;
2853 struct cp_binding_level
*p
;
2856 decl
= lookup_label (name
);
2858 dummy
.label_decl
= decl
;
2859 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2860 gcc_assert (ent
!= NULL
);
2862 /* After labels, make any new cleanups in the function go into their
2863 own new (temporary) binding contour. */
2864 for (p
= current_binding_level
;
2865 p
->kind
!= sk_function_parms
;
2867 p
->more_cleanups_ok
= 0;
2869 if (name
== get_identifier ("wchar_t"))
2870 permerror (input_location
, "label named wchar_t");
2872 if (DECL_INITIAL (decl
) != NULL_TREE
)
2874 error ("duplicate label %qD", decl
);
2875 return error_mark_node
;
2879 struct named_label_use_entry
*use
;
2881 /* Mark label as having been defined. */
2882 DECL_INITIAL (decl
) = error_mark_node
;
2883 /* Say where in the source. */
2884 DECL_SOURCE_LOCATION (decl
) = location
;
2886 ent
->binding_level
= current_binding_level
;
2887 ent
->names_in_scope
= current_binding_level
->names
;
2889 for (use
= ent
->uses
; use
; use
= use
->next
)
2890 check_previous_goto (decl
, use
);
2897 /* Wrapper for define_label_1. */
2900 define_label (location_t location
, tree name
)
2903 timevar_start (TV_NAME_LOOKUP
);
2904 ret
= define_label_1 (location
, name
);
2905 timevar_stop (TV_NAME_LOOKUP
);
2912 struct cp_binding_level
*level
;
2913 struct cp_switch
*next
;
2914 /* The SWITCH_STMT being built. */
2916 /* A splay-tree mapping the low element of a case range to the high
2917 element, or NULL_TREE if there is no high element. Used to
2918 determine whether or not a new case label duplicates an old case
2919 label. We need a tree, rather than simply a hash table, because
2920 of the GNU case range extension. */
2924 /* A stack of the currently active switch statements. The innermost
2925 switch statement is on the top of the stack. There is no need to
2926 mark the stack for garbage collection because it is only active
2927 during the processing of the body of a function, and we never
2928 collect at that point. */
2930 static struct cp_switch
*switch_stack
;
2932 /* Called right after a switch-statement condition is parsed.
2933 SWITCH_STMT is the switch statement being parsed. */
2936 push_switch (tree switch_stmt
)
2938 struct cp_switch
*p
= XNEW (struct cp_switch
);
2939 p
->level
= current_binding_level
;
2940 p
->next
= switch_stack
;
2941 p
->switch_stmt
= switch_stmt
;
2942 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2949 struct cp_switch
*cs
= switch_stack
;
2950 location_t switch_location
;
2952 /* Emit warnings as needed. */
2953 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
2954 if (!processing_template_decl
)
2955 c_do_switch_warnings (cs
->cases
, switch_location
,
2956 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2957 SWITCH_STMT_COND (cs
->switch_stmt
));
2959 splay_tree_delete (cs
->cases
);
2960 switch_stack
= switch_stack
->next
;
2964 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
2965 condition. Note that if TYPE and VALUE are already integral we don't
2966 really do the conversion because the language-independent
2967 warning/optimization code will work better that way. */
2970 case_conversion (tree type
, tree value
)
2972 if (value
== NULL_TREE
)
2975 if (cxx_dialect
>= cxx0x
2976 && (SCOPED_ENUM_P (type
)
2977 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
2979 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
2980 type
= type_promotes_to (type
);
2981 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
2983 return cxx_constant_value (value
);
2986 /* Note that we've seen a definition of a case label, and complain if this
2987 is a bad place for one. */
2990 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
2993 struct cp_binding_level
*p
;
2996 if (processing_template_decl
)
3000 /* For templates, just add the case label; we'll do semantic
3001 analysis at instantiation-time. */
3002 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3003 return add_stmt (build_case_label (low_value
, high_value
, label
));
3006 /* Find the condition on which this switch statement depends. */
3007 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3008 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3009 cond
= TREE_VALUE (cond
);
3011 if (!check_switch_goto (switch_stack
->level
))
3012 return error_mark_node
;
3014 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3016 low_value
= case_conversion (type
, low_value
);
3017 high_value
= case_conversion (type
, high_value
);
3019 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3020 low_value
, high_value
);
3022 /* After labels, make any new cleanups in the function go into their
3023 own new (temporary) binding contour. */
3024 for (p
= current_binding_level
;
3025 p
->kind
!= sk_function_parms
;
3027 p
->more_cleanups_ok
= 0;
3032 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3035 typename_hash (const void* k
)
3038 const_tree
const t
= (const_tree
) k
;
3040 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3041 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3046 typedef struct typename_info
{
3054 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3055 really of type `typename_info*' */
3058 typename_compare (const void * k1
, const void * k2
)
3060 const_tree
const t1
= (const_tree
) k1
;
3061 const typename_info
*const t2
= (const typename_info
*) k2
;
3063 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3064 && TYPE_CONTEXT (t1
) == t2
->scope
3065 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3066 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3067 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3070 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3071 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3073 Returns the new TYPENAME_TYPE. */
3075 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3078 build_typename_type (tree context
, tree name
, tree fullname
,
3079 enum tag_types tag_type
)
3087 if (typename_htab
== NULL
)
3088 typename_htab
= htab_create_ggc (61, &typename_hash
,
3089 &typename_compare
, NULL
);
3091 ti
.scope
= FROB_CONTEXT (context
);
3093 ti
.template_id
= fullname
;
3094 ti
.enum_p
= tag_type
== enum_type
;
3095 ti
.class_p
= (tag_type
== class_type
3096 || tag_type
== record_type
3097 || tag_type
== union_type
);
3098 hash
= (htab_hash_pointer (ti
.scope
)
3099 ^ htab_hash_pointer (ti
.name
));
3101 /* See if we already have this type. */
3102 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3107 /* Build the TYPENAME_TYPE. */
3108 t
= cxx_make_type (TYPENAME_TYPE
);
3109 TYPE_CONTEXT (t
) = ti
.scope
;
3110 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3111 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3112 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3114 /* Build the corresponding TYPE_DECL. */
3115 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3116 TYPE_NAME (TREE_TYPE (d
)) = d
;
3117 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3118 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3119 DECL_ARTIFICIAL (d
) = 1;
3121 /* Store it in the hash table. */
3124 /* TYPENAME_TYPEs must always be compared structurally, because
3125 they may or may not resolve down to another type depending on
3126 the currently open classes. */
3127 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3133 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3134 provided to name the type. Returns an appropriate type, unless an
3135 error occurs, in which case error_mark_node is returned. If we
3136 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3137 return that, rather than the _TYPE it corresponds to, in other
3138 cases we look through the type decl. If TF_ERROR is set, complain
3139 about errors, otherwise be quiet. */
3142 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3143 tsubst_flags_t complain
)
3149 if (name
== error_mark_node
3150 || context
== NULL_TREE
3151 || context
== error_mark_node
)
3152 return error_mark_node
;
3156 if (!(TYPE_LANG_SPECIFIC (name
)
3157 && (CLASSTYPE_IS_TEMPLATE (name
)
3158 || CLASSTYPE_USE_TEMPLATE (name
))))
3159 name
= TYPE_IDENTIFIER (name
);
3161 /* Create a TEMPLATE_ID_EXPR for the type. */
3162 name
= build_nt (TEMPLATE_ID_EXPR
,
3163 CLASSTYPE_TI_TEMPLATE (name
),
3164 CLASSTYPE_TI_ARGS (name
));
3166 else if (TREE_CODE (name
) == TYPE_DECL
)
3167 name
= DECL_NAME (name
);
3171 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3173 name
= TREE_OPERAND (name
, 0);
3174 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3175 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3176 else if (TREE_CODE (name
) == OVERLOAD
)
3178 error ("%qD is not a type", name
);
3179 return error_mark_node
;
3182 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3184 error ("%qD used without template parameters", name
);
3185 return error_mark_node
;
3187 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3188 gcc_assert (TYPE_P (context
));
3190 if (!MAYBE_CLASS_TYPE_P (context
))
3192 if (complain
& tf_error
)
3193 error ("%q#T is not a class", context
);
3194 return error_mark_node
;
3197 /* When the CONTEXT is a dependent type, NAME could refer to a
3198 dependent base class of CONTEXT. But look inside it anyway
3199 if CONTEXT is a currently open scope, in case it refers to a
3200 member of the current instantiation or a non-dependent base;
3201 lookup will stop when we hit a dependent base. */
3202 if (!dependent_scope_p (context
))
3203 /* We should only set WANT_TYPE when we're a nested typename type.
3204 Then we can give better diagnostics if we find a non-type. */
3205 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3209 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3210 return build_typename_type (context
, name
, fullname
, tag_type
);
3212 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3216 if (complain
& tf_error
)
3217 error (want_template
? "no class template named %q#T in %q#T"
3218 : "no type named %q#T in %q#T", name
, context
);
3219 return error_mark_node
;
3222 /* Pull out the template from an injected-class-name (or multiple). */
3224 t
= maybe_get_template_decl_from_type_decl (t
);
3226 if (TREE_CODE (t
) == TREE_LIST
)
3228 if (complain
& tf_error
)
3230 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3231 print_candidates (t
);
3233 return error_mark_node
;
3236 if (want_template
&& !DECL_CLASS_TEMPLATE_P (t
))
3238 if (complain
& tf_error
)
3239 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3241 return error_mark_node
;
3243 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3245 if (complain
& tf_error
)
3246 error ("%<typename %T::%D%> names %q#T, which is not a type",
3248 return error_mark_node
;
3251 if (complain
& tf_error
)
3252 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3254 /* If we are currently parsing a template and if T is a typedef accessed
3255 through CONTEXT then we need to remember and check access of T at
3256 template instantiation time. */
3257 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3260 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3262 /*entering_scope=*/0,
3263 tf_warning_or_error
| tf_user
);
3265 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3271 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3272 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3273 in which case error_mark_node is returned.
3275 If PARM_LIST is non-NULL, also make sure that the template parameter
3276 list of TEMPLATE_DECL matches.
3278 If COMPLAIN zero, don't complain about any errors that occur. */
3281 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3282 tsubst_flags_t complain
)
3288 name
= TYPE_IDENTIFIER (name
);
3289 else if (DECL_P (name
))
3290 name
= DECL_NAME (name
);
3291 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3293 if (!dependent_type_p (context
)
3294 || currently_open_class (context
))
3296 tree tmpl
= NULL_TREE
;
3298 if (MAYBE_CLASS_TYPE_P (context
))
3299 tmpl
= lookup_field (context
, name
, 0, false);
3301 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3302 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3304 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
3306 if (complain
& tf_error
)
3307 error ("no class template named %q#T in %q#T", name
, context
);
3308 return error_mark_node
;
3312 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3314 if (complain
& tf_error
)
3316 error ("template parameters do not match template");
3317 error ("%q+D declared here", tmpl
);
3319 return error_mark_node
;
3322 if (complain
& tf_error
)
3323 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3328 /* Build the UNBOUND_CLASS_TEMPLATE. */
3329 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3330 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3331 TREE_TYPE (t
) = NULL_TREE
;
3332 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3334 /* Build the corresponding TEMPLATE_DECL. */
3335 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3336 TYPE_NAME (TREE_TYPE (d
)) = d
;
3337 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3338 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3339 DECL_ARTIFICIAL (d
) = 1;
3340 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3347 /* Push the declarations of builtin types into the namespace.
3348 RID_INDEX is the index of the builtin type in the array
3349 RID_POINTERS. NAME is the name used when looking up the builtin
3350 type. TYPE is the _TYPE node for the builtin type. */
3353 record_builtin_type (enum rid rid_index
,
3357 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3358 tree tdecl
= NULL_TREE
;
3360 if ((int) rid_index
< (int) RID_MAX
)
3361 rname
= ridpointers
[(int) rid_index
];
3363 tname
= get_identifier (name
);
3365 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3366 eliminated. Built-in types should not be looked up name; their
3367 names are keywords that the parser can recognize. However, there
3368 is code in c-common.c that uses identifier_global_value to look
3369 up built-in types by name. */
3372 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3373 DECL_ARTIFICIAL (tdecl
) = 1;
3374 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3380 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3381 DECL_ARTIFICIAL (tdecl
) = 1;
3383 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3386 if (!TYPE_NAME (type
))
3387 TYPE_NAME (type
) = tdecl
;
3390 debug_hooks
->type_decl (tdecl
, 0);
3393 /* Record one of the standard Java types.
3394 * Declare it as having the given NAME.
3395 * If SIZE > 0, it is the size of one of the integral types;
3396 * otherwise it is the negative of the size of one of the other types. */
3399 record_builtin_java_type (const char* name
, int size
)
3404 type
= build_nonstandard_integer_type (size
, 0);
3405 type
= build_distinct_type_copy (type
);
3407 else if (size
> -32)
3410 /* "__java_char" or ""__java_boolean". */
3411 type
= build_nonstandard_integer_type (-size
, 1);
3412 type
= build_distinct_type_copy (type
);
3413 /* Get the signed type cached and attached to the unsigned type,
3414 so it doesn't get garbage-collected at "random" times,
3415 causing potential codegen differences out of different UIDs
3416 and different alias set numbers. */
3417 stype
= build_nonstandard_integer_type (-size
, 0);
3418 stype
= build_distinct_type_copy (stype
);
3419 TREE_CHAIN (type
) = stype
;
3420 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3423 { /* "__java_float" or ""__java_double". */
3424 type
= make_node (REAL_TYPE
);
3425 TYPE_PRECISION (type
) = - size
;
3428 record_builtin_type (RID_MAX
, name
, type
);
3429 decl
= TYPE_NAME (type
);
3431 /* Suppress generate debug symbol entries for these types,
3432 since for normal C++ they are just clutter.
3433 However, push_lang_context undoes this if extern "Java" is seen. */
3434 DECL_IGNORED_P (decl
) = 1;
3436 TYPE_FOR_JAVA (type
) = 1;
3440 /* Push a type into the namespace so that the back ends ignore it. */
3443 record_unknown_type (tree type
, const char* name
)
3445 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3446 TYPE_DECL
, get_identifier (name
), type
));
3447 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3448 DECL_IGNORED_P (decl
) = 1;
3449 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3450 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3451 TYPE_ALIGN (type
) = 1;
3452 TYPE_USER_ALIGN (type
) = 0;
3453 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3456 /* A string for which we should create an IDENTIFIER_NODE at
3459 typedef struct predefined_identifier
3461 /* The name of the identifier. */
3462 const char *const name
;
3463 /* The place where the IDENTIFIER_NODE should be stored. */
3465 /* Nonzero if this is the name of a constructor or destructor. */
3466 const int ctor_or_dtor_p
;
3467 } predefined_identifier
;
3469 /* Create all the predefined identifiers. */
3472 initialize_predefined_identifiers (void)
3474 const predefined_identifier
*pid
;
3476 /* A table of identifiers to create at startup. */
3477 static const predefined_identifier predefined_identifiers
[] = {
3478 { "C++", &lang_name_cplusplus
, 0 },
3479 { "C", &lang_name_c
, 0 },
3480 { "Java", &lang_name_java
, 0 },
3481 /* Some of these names have a trailing space so that it is
3482 impossible for them to conflict with names written by users. */
3483 { "__ct ", &ctor_identifier
, 1 },
3484 { "__base_ctor ", &base_ctor_identifier
, 1 },
3485 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3486 { "__dt ", &dtor_identifier
, 1 },
3487 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3488 { "__base_dtor ", &base_dtor_identifier
, 1 },
3489 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3490 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3491 { "nelts", &nelts_identifier
, 0 },
3492 { THIS_NAME
, &this_identifier
, 0 },
3493 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3494 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3495 { "_vptr", &vptr_identifier
, 0 },
3496 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3497 { "::", &global_scope_name
, 0 },
3498 { "std", &std_identifier
, 0 },
3502 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3504 *pid
->node
= get_identifier (pid
->name
);
3505 if (pid
->ctor_or_dtor_p
)
3506 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3510 /* Create the predefined scalar types of C,
3511 and some nodes representing standard constants (0, 1, (void *)0).
3512 Initialize the global binding level.
3513 Make definitions for built-in primitive functions. */
3516 cxx_init_decl_processing (void)
3519 tree void_ftype_ptr
;
3521 /* Create all the identifiers we need. */
3522 initialize_predefined_identifiers ();
3524 /* Create the global variables. */
3525 push_to_top_level ();
3527 current_function_decl
= NULL_TREE
;
3528 current_binding_level
= NULL
;
3529 /* Enter the global namespace. */
3530 gcc_assert (global_namespace
== NULL_TREE
);
3531 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3533 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3534 TREE_PUBLIC (global_namespace
) = 1;
3535 begin_scope (sk_namespace
, global_namespace
);
3537 if (flag_visibility_ms_compat
)
3538 default_visibility
= VISIBILITY_HIDDEN
;
3541 current_lang_name
= lang_name_c
;
3543 /* Create the `std' namespace. */
3544 push_namespace (std_identifier
);
3545 std_node
= current_namespace
;
3548 c_common_nodes_and_builtins ();
3550 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3551 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3552 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3553 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3554 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3555 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3556 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3557 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3559 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3561 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3562 truthvalue_type_node
= boolean_type_node
;
3563 truthvalue_false_node
= boolean_false_node
;
3564 truthvalue_true_node
= boolean_true_node
;
3566 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3567 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3568 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3571 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3574 delta_type_node
= ptrdiff_type_node
;
3575 vtable_index_type
= ptrdiff_type_node
;
3577 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3578 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3579 void_ftype_ptr
= build_function_type_list (void_type_node
,
3580 ptr_type_node
, NULL_TREE
);
3582 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3584 /* C++ extensions */
3586 unknown_type_node
= make_node (LANG_TYPE
);
3587 record_unknown_type (unknown_type_node
, "unknown type");
3589 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3590 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3592 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3594 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3595 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3597 init_list_type_node
= make_node (LANG_TYPE
);
3598 record_unknown_type (init_list_type_node
, "init list");
3601 /* Make sure we get a unique function type, so we can give
3602 its pointer type a name. (This wins for gdb.) */
3603 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3604 TREE_TYPE (vfunc_type
) = integer_type_node
;
3605 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3606 layout_type (vfunc_type
);
3608 vtable_entry_type
= build_pointer_type (vfunc_type
);
3610 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3613 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3614 layout_type (vtbl_type_node
);
3615 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3616 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3617 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3618 layout_type (vtbl_ptr_type_node
);
3619 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3621 push_namespace (get_identifier ("__cxxabiv1"));
3622 abi_node
= current_namespace
;
3625 global_type_node
= make_node (LANG_TYPE
);
3626 record_unknown_type (global_type_node
, "global type");
3629 current_lang_name
= lang_name_cplusplus
;
3632 tree newtype
, deltype
;
3633 tree ptr_ftype_sizetype
;
3637 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3638 if (cxx_dialect
== cxx98
)
3641 tree bad_alloc_type_node
;
3642 tree bad_alloc_decl
;
3644 push_namespace (std_identifier
);
3645 bad_alloc_id
= get_identifier ("bad_alloc");
3646 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3647 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3649 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3650 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3654 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3657 new_eh_spec
= noexcept_false_spec
;
3659 newtype
= build_exception_variant (ptr_ftype_sizetype
, new_eh_spec
);
3660 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3661 push_cp_library_fn (NEW_EXPR
, newtype
);
3662 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3663 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3664 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3666 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3667 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3668 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3669 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3670 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3671 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3672 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3673 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3677 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3679 /* Perform other language dependent initializations. */
3680 init_class_processing ();
3681 init_rtti_processing ();
3682 init_template_processing ();
3684 if (flag_exceptions
)
3685 init_exception_processing ();
3687 if (! supports_one_only ())
3690 make_fname_decl
= cp_make_fname_decl
;
3691 start_fname_decls ();
3693 /* Show we use EH for cleanups. */
3694 if (flag_exceptions
)
3695 using_eh_for_cleanups ();
3698 /* Generate an initializer for a function naming variable from
3699 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3700 filled in with the type of the init. */
3703 cp_fname_init (const char* name
, tree
*type_p
)
3705 tree domain
= NULL_TREE
;
3707 tree init
= NULL_TREE
;
3712 length
= strlen (name
);
3713 domain
= build_index_type (size_int (length
));
3714 init
= build_string (length
+ 1, name
);
3717 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3718 type
= build_cplus_array_type (type
, domain
);
3723 TREE_TYPE (init
) = type
;
3725 init
= error_mark_node
;
3730 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3731 the decl, LOC is the location to give the decl, NAME is the
3732 initialization string and TYPE_DEP indicates whether NAME depended
3733 on the type of the function. We make use of that to detect
3734 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3735 at the point of first use, so we mustn't push the decl now. */
3738 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3740 const char *const name
= (type_dep
&& processing_template_decl
3741 ? NULL
: fname_as_string (type_dep
));
3743 tree init
= cp_fname_init (name
, &type
);
3744 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3747 free (CONST_CAST (char *, name
));
3749 /* As we're using pushdecl_with_scope, we must set the context. */
3750 DECL_CONTEXT (decl
) = current_function_decl
;
3751 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3753 TREE_STATIC (decl
) = 1;
3754 TREE_READONLY (decl
) = 1;
3755 DECL_ARTIFICIAL (decl
) = 1;
3757 TREE_USED (decl
) = 1;
3759 if (current_function_decl
)
3761 struct cp_binding_level
*b
= current_binding_level
;
3762 if (b
->kind
== sk_function_parms
)
3763 return error_mark_node
;
3764 while (b
->level_chain
->kind
!= sk_function_parms
)
3766 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3767 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3768 LOOKUP_ONLYCONVERTING
);
3772 DECL_THIS_STATIC (decl
) = true;
3773 pushdecl_top_level_and_finish (decl
, init
);
3780 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3782 tree id
= DECL_NAME (decl
);
3783 const char *name
= IDENTIFIER_POINTER (id
);
3785 retrofit_lang_decl (decl
);
3787 DECL_ARTIFICIAL (decl
) = 1;
3788 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3789 SET_DECL_LANGUAGE (decl
, lang_c
);
3790 /* Runtime library routines are, by definition, available in an
3791 external shared object. */
3792 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3793 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3795 DECL_CONTEXT (decl
) = context
;
3798 pushdecl_top_level (decl
);
3802 /* A function in the user's namespace should have an explicit
3803 declaration before it is used. Mark the built-in function as
3804 anticipated but not actually declared. */
3805 if (name
[0] != '_' || name
[1] != '_')
3806 DECL_ANTICIPATED (decl
) = 1;
3807 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3809 size_t len
= strlen (name
);
3811 /* Treat __*_chk fortification functions as anticipated as well,
3812 unless they are __builtin_*. */
3813 if (len
> strlen ("___chk")
3814 && memcmp (name
+ len
- strlen ("_chk"),
3815 "_chk", strlen ("_chk") + 1) == 0)
3816 DECL_ANTICIPATED (decl
) = 1;
3823 cxx_builtin_function (tree decl
)
3825 tree id
= DECL_NAME (decl
);
3826 const char *name
= IDENTIFIER_POINTER (id
);
3827 /* All builtins that don't begin with an '_' should additionally
3828 go in the 'std' namespace. */
3831 tree decl2
= copy_node(decl
);
3832 push_namespace (std_identifier
);
3833 builtin_function_1 (decl2
, std_node
, false);
3837 return builtin_function_1 (decl
, NULL_TREE
, false);
3840 /* Like cxx_builtin_function, but guarantee the function is added to the global
3841 scope. This is to allow function specific options to add new machine
3842 dependent builtins when the target ISA changes via attribute((target(...)))
3843 which saves space on program startup if the program does not use non-generic
3847 cxx_builtin_function_ext_scope (tree decl
)
3850 tree id
= DECL_NAME (decl
);
3851 const char *name
= IDENTIFIER_POINTER (id
);
3852 /* All builtins that don't begin with an '_' should additionally
3853 go in the 'std' namespace. */
3856 tree decl2
= copy_node(decl
);
3857 push_namespace (std_identifier
);
3858 builtin_function_1 (decl2
, std_node
, true);
3862 return builtin_function_1 (decl
, NULL_TREE
, true);
3865 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3866 function. Not called directly. */
3869 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3871 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3872 DECL_EXTERNAL (fn
) = 1;
3873 TREE_PUBLIC (fn
) = 1;
3874 DECL_ARTIFICIAL (fn
) = 1;
3875 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3876 SET_DECL_LANGUAGE (fn
, lang_c
);
3877 /* Runtime library routines are, by definition, available in an
3878 external shared object. */
3879 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3880 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3884 /* Returns the _DECL for a library function with C linkage.
3885 We assume that such functions never throw; if this is incorrect,
3886 callers should unset TREE_NOTHROW. */
3889 build_library_fn (tree name
, tree type
)
3891 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3892 TREE_NOTHROW (fn
) = 1;
3896 /* Returns the _DECL for a library function with C++ linkage. */
3899 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3901 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3902 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3903 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3904 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3908 /* Like build_library_fn, but takes a C string instead of an
3912 build_library_fn_ptr (const char* name
, tree type
)
3914 return build_library_fn (get_identifier (name
), type
);
3917 /* Like build_cp_library_fn, but takes a C string instead of an
3921 build_cp_library_fn_ptr (const char* name
, tree type
)
3923 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3926 /* Like build_library_fn, but also pushes the function so that we will
3927 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3928 may throw exceptions listed in RAISES. */
3931 push_library_fn (tree name
, tree type
, tree raises
)
3936 type
= build_exception_variant (type
, raises
);
3938 fn
= build_library_fn (name
, type
);
3939 pushdecl_top_level (fn
);
3943 /* Like build_cp_library_fn, but also pushes the function so that it
3944 will be found by normal lookup. */
3947 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3949 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3956 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3960 push_void_library_fn (tree name
, tree parmtypes
)
3962 tree type
= build_function_type (void_type_node
, parmtypes
);
3963 return push_library_fn (name
, type
, NULL_TREE
);
3966 /* Like push_library_fn, but also note that this function throws
3967 and does not return. Used for __throw_foo and the like. */
3970 push_throw_library_fn (tree name
, tree type
)
3972 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
3973 TREE_THIS_VOLATILE (fn
) = 1;
3974 TREE_NOTHROW (fn
) = 0;
3978 /* When we call finish_struct for an anonymous union, we create
3979 default copy constructors and such. But, an anonymous union
3980 shouldn't have such things; this function undoes the damage to the
3981 anonymous union type T.
3983 (The reason that we create the synthesized methods is that we don't
3984 distinguish `union { int i; }' from `typedef union { int i; } U'.
3985 The first is an anonymous union; the second is just an ordinary
3989 fixup_anonymous_aggr (tree t
)
3993 /* Wipe out memory of synthesized methods. */
3994 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
3995 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3996 TYPE_HAS_COPY_CTOR (t
) = 0;
3997 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
3998 TYPE_HAS_COPY_ASSIGN (t
) = 0;
3999 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4001 /* Splice the implicitly generated functions out of the TYPE_METHODS
4003 q
= &TYPE_METHODS (t
);
4006 if (DECL_ARTIFICIAL (*q
))
4007 *q
= TREE_CHAIN (*q
);
4009 q
= &DECL_CHAIN (*q
);
4012 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4013 if (TYPE_METHODS (t
))
4015 tree decl
= TYPE_MAIN_DECL (t
);
4017 if (TREE_CODE (t
) != UNION_TYPE
)
4018 error_at (DECL_SOURCE_LOCATION (decl
),
4019 "an anonymous struct cannot have function members");
4021 error_at (DECL_SOURCE_LOCATION (decl
),
4022 "an anonymous union cannot have function members");
4025 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4026 assignment operators (because they cannot have these methods themselves).
4027 For anonymous unions this is already checked because they are not allowed
4028 in any union, otherwise we have to check it. */
4029 if (TREE_CODE (t
) != UNION_TYPE
)
4033 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4034 if (TREE_CODE (field
) == FIELD_DECL
)
4036 type
= TREE_TYPE (field
);
4037 if (CLASS_TYPE_P (type
))
4039 if (TYPE_NEEDS_CONSTRUCTING (type
))
4040 error ("member %q+#D with constructor not allowed "
4041 "in anonymous aggregate", field
);
4042 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4043 error ("member %q+#D with destructor not allowed "
4044 "in anonymous aggregate", field
);
4045 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4046 error ("member %q+#D with copy assignment operator "
4047 "not allowed in anonymous aggregate", field
);
4053 /* Make sure that a declaration with no declarator is well-formed, i.e.
4054 just declares a tagged type or anonymous union.
4056 Returns the type declared; or NULL_TREE if none. */
4059 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
4061 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
4062 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
4063 /* If a class, struct, or enum type is declared by the DECLSPECS
4064 (i.e, if a class-specifier, enum-specifier, or non-typename
4065 elaborated-type-specifier appears in the DECLSPECS),
4066 DECLARED_TYPE is set to the corresponding type. */
4067 tree declared_type
= NULL_TREE
;
4068 bool error_p
= false;
4070 if (declspecs
->multiple_types_p
)
4071 error ("multiple types in one declaration");
4072 else if (declspecs
->redefined_builtin_type
)
4074 if (!in_system_header
)
4075 permerror (input_location
, "redeclaration of C++ built-in type %qT",
4076 declspecs
->redefined_builtin_type
);
4081 && TYPE_P (declspecs
->type
)
4082 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4083 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4084 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4085 declared_type
= declspecs
->type
;
4086 else if (declspecs
->type
== error_mark_node
)
4088 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4089 permerror (input_location
, "declaration does not declare anything");
4090 /* Check for an anonymous union. */
4091 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4092 && TYPE_ANONYMOUS_P (declared_type
))
4094 /* 7/3 In a simple-declaration, the optional init-declarator-list
4095 can be omitted only when declaring a class (clause 9) or
4096 enumeration (7.2), that is, when the decl-specifier-seq contains
4097 either a class-specifier, an elaborated-type-specifier with
4098 a class-key (9.1), or an enum-specifier. In these cases and
4099 whenever a class-specifier or enum-specifier is present in the
4100 decl-specifier-seq, the identifiers in these specifiers are among
4101 the names being declared by the declaration (as class-name,
4102 enum-names, or enumerators, depending on the syntax). In such
4103 cases, and except for the declaration of an unnamed bit-field (9.6),
4104 the decl-specifier-seq shall introduce one or more names into the
4105 program, or shall redeclare a name introduced by a previous
4106 declaration. [Example:
4107 enum { }; // ill-formed
4108 typedef class { }; // ill-formed
4112 error ("missing type-name in typedef-declaration");
4115 /* Anonymous unions are objects, so they can have specifiers. */;
4116 SET_ANON_AGGR_TYPE_P (declared_type
);
4118 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4119 pedwarn (input_location
, OPT_pedantic
, "ISO C++ prohibits anonymous structs");
4124 if (declspecs
->specs
[(int)ds_inline
]
4125 || declspecs
->specs
[(int)ds_virtual
])
4126 error ("%qs can only be specified for functions",
4127 declspecs
->specs
[(int)ds_inline
]
4128 ? "inline" : "virtual");
4130 && (!current_class_type
4131 || current_scope () != current_class_type
))
4132 error ("%<friend%> can only be specified inside a class");
4133 else if (declspecs
->specs
[(int)ds_explicit
])
4134 error ("%<explicit%> can only be specified for constructors");
4135 else if (declspecs
->storage_class
)
4136 error ("a storage class can only be specified for objects "
4138 else if (declspecs
->specs
[(int)ds_const
]
4139 || declspecs
->specs
[(int)ds_volatile
]
4140 || declspecs
->specs
[(int)ds_restrict
]
4141 || declspecs
->specs
[(int)ds_thread
])
4142 error ("qualifiers can only be specified for objects "
4144 else if (saw_typedef
)
4145 warning (0, "%<typedef%> was ignored in this declaration");
4146 else if (declspecs
->specs
[(int) ds_constexpr
])
4147 error ("%<constexpr%> cannot be used for type declarations");
4150 return declared_type
;
4153 /* Called when a declaration is seen that contains no names to declare.
4154 If its type is a reference to a structure, union or enum inherited
4155 from a containing scope, shadow that tag name for the current scope
4156 with a forward reference.
4157 If its type defines a new named structure or union
4158 or defines an enum, it is valid but we need not do anything here.
4159 Otherwise, it is an error.
4161 C++: may have to grok the declspecs to learn about static,
4162 complain for anonymous unions.
4164 Returns the TYPE declared -- or NULL_TREE if none. */
4167 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4169 tree t
= check_tag_decl (declspecs
);
4174 if (declspecs
->attributes
)
4176 warning (0, "attribute ignored in declaration of %q+#T", t
);
4177 warning (0, "attribute for %q+#T must follow the %qs keyword",
4178 t
, class_key_or_enum_as_string (t
));
4182 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4185 /* This is where the variables in an anonymous union are
4186 declared. An anonymous union declaration looks like:
4188 because there is no declarator after the union, the parser
4189 sends that declaration here. */
4190 if (ANON_AGGR_TYPE_P (t
))
4192 fixup_anonymous_aggr (t
);
4194 if (TYPE_FIELDS (t
))
4196 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4197 declspecs
, NORMAL
, 0, NULL
);
4198 finish_anon_union (decl
);
4205 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4208 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4209 const cp_declarator
*declarator
,
4210 bool is_template_arg
)
4214 enum decl_context context
4215 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4216 attrs
= type_specifiers
->attributes
;
4217 type_specifiers
->attributes
= NULL_TREE
;
4218 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4219 if (attrs
&& type
!= error_mark_node
)
4221 if (CLASS_TYPE_P (type
))
4222 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4223 "outside of definition", type
);
4224 else if (MAYBE_CLASS_TYPE_P (type
))
4225 /* A template type parameter or other dependent type. */
4226 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4227 "type %qT without an associated declaration", type
);
4229 cplus_decl_attributes (&type
, attrs
, 0);
4234 /* Process a DECLARATOR for a function-scope variable declaration,
4235 namespace-scope variable declaration, or function declaration.
4236 (Function definitions go through start_function; class member
4237 declarations appearing in the body of the class go through
4238 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4239 If an error occurs, the error_mark_node is returned instead.
4241 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4242 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4243 for an explicitly defaulted function, or SD_DELETED for an explicitly
4244 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4245 implicitly initialized via a default constructor. ATTRIBUTES and
4246 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4247 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4248 set, the caller is responsible for calling pop_scope. */
4251 start_decl (const cp_declarator
*declarator
,
4252 cp_decl_specifier_seq
*declspecs
,
4255 tree prefix_attributes
,
4256 tree
*pushed_scope_p
)
4264 *pushed_scope_p
= NULL_TREE
;
4266 /* An object declared as __attribute__((deprecated)) suppresses
4267 warnings of uses of other deprecated items. */
4268 if (lookup_attribute ("deprecated", attributes
))
4269 deprecated_state
= DEPRECATED_SUPPRESS
;
4271 attributes
= chainon (attributes
, prefix_attributes
);
4273 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4276 deprecated_state
= DEPRECATED_NORMAL
;
4278 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4279 || decl
== error_mark_node
)
4280 return error_mark_node
;
4282 context
= CP_DECL_CONTEXT (decl
);
4283 if (context
!= global_namespace
)
4284 *pushed_scope_p
= push_scope (context
);
4287 /* Is it valid for this decl to have an initializer at all?
4288 If not, set INITIALIZED to zero, which will indirectly
4289 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4290 switch (TREE_CODE (decl
))
4293 error ("typedef %qD is initialized (use decltype instead)", decl
);
4294 return error_mark_node
;
4297 if (initialized
== SD_DELETED
)
4298 /* We'll handle the rest of the semantics later, but we need to
4299 set this now so it's visible to duplicate_decls. */
4300 DECL_DELETED_FN (decl
) = 1;
4309 if (! toplevel_bindings_p ()
4310 && DECL_EXTERNAL (decl
))
4311 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4313 DECL_EXTERNAL (decl
) = 0;
4314 if (toplevel_bindings_p ())
4315 TREE_STATIC (decl
) = 1;
4317 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4319 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4320 record_key_method_defined (decl
);
4322 /* If this is a typedef that names the class for linkage purposes
4323 (7.1.3p8), apply any attributes directly to the type. */
4324 if (TREE_CODE (decl
) == TYPE_DECL
4325 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4326 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4327 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4331 /* Set attributes here so if duplicate decl, will have proper attributes. */
4332 cplus_decl_attributes (&decl
, attributes
, flags
);
4334 /* Dllimported symbols cannot be defined. Static data members (which
4335 can be initialized in-class and dllimported) go through grokfield,
4336 not here, so we don't need to exclude those decls when checking for
4338 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4340 error ("definition of %q#D is marked %<dllimport%>", decl
);
4341 DECL_DLLIMPORT_P (decl
) = 0;
4344 /* If #pragma weak was used, mark the decl weak now. */
4345 maybe_apply_pragma_weak (decl
);
4347 if (TREE_CODE (decl
) == FUNCTION_DECL
4348 && DECL_DECLARED_INLINE_P (decl
)
4349 && DECL_UNINLINABLE (decl
)
4350 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4351 warning (0, "inline function %q+D given attribute noinline", decl
);
4353 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4355 if (TREE_CODE (decl
) == VAR_DECL
)
4357 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4358 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4359 error ("%q#D is not a static member of %q#T", decl
, context
);
4362 if (DECL_CONTEXT (field
) != context
)
4364 if (!same_type_p (DECL_CONTEXT (field
), context
))
4365 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4366 "to be defined as %<%T::%D%>",
4367 DECL_CONTEXT (field
), DECL_NAME (decl
),
4368 context
, DECL_NAME (decl
));
4369 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4371 if (processing_specialization
4372 && template_class_depth (context
) == 0
4373 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4374 error ("template header not allowed in member definition "
4375 "of explicitly specialized class");
4376 /* Static data member are tricky; an in-class initialization
4377 still doesn't provide a definition, so the in-class
4378 declaration will have DECL_EXTERNAL set, but will have an
4379 initialization. Thus, duplicate_decls won't warn
4380 about this situation, and so we check here. */
4381 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4382 error ("duplicate initialization of %qD", decl
);
4383 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4385 if (declspecs
->specs
[(int) ds_constexpr
]
4386 && !DECL_DECLARED_CONSTEXPR_P (field
))
4387 error ("%qD declared %<constexpr%> outside its class", field
);
4392 tree field
= check_classfn (context
, decl
,
4393 (processing_template_decl
4394 > template_class_depth (context
))
4395 ? current_template_parms
4397 if (field
&& field
!= error_mark_node
4398 && duplicate_decls (decl
, field
,
4399 /*newdecl_is_friend=*/false))
4403 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4404 DECL_IN_AGGR_P (decl
) = 0;
4405 /* Do not mark DECL as an explicit specialization if it was not
4406 already marked as an instantiation; a declaration should
4407 never be marked as a specialization unless we know what
4408 template is being specialized. */
4409 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4411 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4413 /* [temp.expl.spec] An explicit specialization of a static data
4414 member of a template is a definition if the declaration
4415 includes an initializer; otherwise, it is a declaration.
4417 We check for processing_specialization so this only applies
4418 to the new specialization syntax. */
4419 if (!initialized
&& processing_specialization
)
4420 DECL_EXTERNAL (decl
) = 1;
4423 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4424 /* Aliases are definitions. */
4426 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4430 was_public
= TREE_PUBLIC (decl
);
4432 /* Enter this declaration into the symbol table. */
4433 decl
= maybe_push_decl (decl
);
4435 if (processing_template_decl
)
4436 decl
= push_template_decl (decl
);
4437 if (decl
== error_mark_node
)
4438 return error_mark_node
;
4440 /* Tell the back end to use or not use .common as appropriate. If we say
4441 -fconserve-space, we want this to save .data space, at the expense of
4442 wrong semantics. If we say -fno-conserve-space, we want this to
4443 produce errors about redefs; to do this we force variables into the
4445 if (flag_conserve_space
4446 && TREE_CODE (decl
) == VAR_DECL
4447 && TREE_PUBLIC (decl
)
4448 && !DECL_THREAD_LOCAL_P (decl
)
4449 && !have_global_bss_p ())
4450 DECL_COMMON (decl
) = 1;
4452 if (TREE_CODE (decl
) == VAR_DECL
4453 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4454 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4456 /* This is a const variable with implicit 'static'. Set
4457 DECL_THIS_STATIC so we can tell it from variables that are
4458 !TREE_PUBLIC because of the anonymous namespace. */
4459 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4460 DECL_THIS_STATIC (decl
) = 1;
4463 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4464 start_decl_1 (decl
, initialized
);
4469 /* Process the declaration of a variable DECL. INITIALIZED is true
4470 iff DECL is explicitly initialized. (INITIALIZED is false if the
4471 variable is initialized via an implicitly-called constructor.)
4472 This function must be called for ordinary variables (including, for
4473 example, implicit instantiations of templates), but must not be
4474 called for template declarations. */
4477 start_decl_1 (tree decl
, bool initialized
)
4481 bool aggregate_definition_p
;
4483 gcc_assert (!processing_template_decl
);
4485 if (error_operand_p (decl
))
4488 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4490 type
= TREE_TYPE (decl
);
4491 complete_p
= COMPLETE_TYPE_P (type
);
4492 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4494 /* If an explicit initializer is present, or if this is a definition
4495 of an aggregate, then we need a complete type at this point.
4496 (Scalars are always complete types, so there is nothing to
4497 check.) This code just sets COMPLETE_P; errors (if necessary)
4498 are issued below. */
4499 if ((initialized
|| aggregate_definition_p
)
4501 && COMPLETE_TYPE_P (complete_type (type
)))
4504 /* We will not yet have set TREE_READONLY on DECL if the type
4505 was "const", but incomplete, before this point. But, now, we
4506 have a complete type, so we can try again. */
4507 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4511 /* Is it valid for this decl to have an initializer at all? */
4513 /* Don't allow initializations for incomplete types except for
4514 arrays which might be completed by the initialization. */
4516 ; /* A complete type is ok. */
4517 else if (type_uses_auto (type
))
4518 ; /* An auto type is ok. */
4519 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4521 error ("variable %q#D has initializer but incomplete type", decl
);
4522 type
= TREE_TYPE (decl
) = error_mark_node
;
4524 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4526 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4527 error ("elements of array %q#D have incomplete type", decl
);
4528 /* else we already gave an error in start_decl. */
4531 else if (aggregate_definition_p
&& !complete_p
)
4533 if (type_uses_auto (type
))
4534 error ("declaration of %q#D has no initializer", decl
);
4536 error ("aggregate %q#D has incomplete type and cannot be defined",
4538 /* Change the type so that assemble_variable will give
4539 DECL an rtl we can live with: (mem (const_int 0)). */
4540 type
= TREE_TYPE (decl
) = error_mark_node
;
4543 /* Create a new scope to hold this declaration if necessary.
4544 Whether or not a new scope is necessary cannot be determined
4545 until after the type has been completed; if the type is a
4546 specialization of a class template it is not until after
4547 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4548 will be set correctly. */
4549 maybe_push_cleanup_level (type
);
4552 /* Handle initialization of references. DECL, TYPE, and INIT have the
4553 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4554 but will be set to a new CLEANUP_STMT if a temporary is created
4555 that must be destroyed subsequently.
4557 Returns an initializer expression to use to initialize DECL, or
4558 NULL if the initialization can be performed statically.
4560 Quotes on semantics can be found in ARM 8.4.3. */
4563 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4567 if (init
== NULL_TREE
)
4569 if ((DECL_LANG_SPECIFIC (decl
) == 0
4570 || DECL_IN_AGGR_P (decl
) == 0)
4571 && ! DECL_THIS_EXTERN (decl
))
4572 error ("%qD declared as reference but not initialized", decl
);
4576 if (TREE_CODE (init
) == TREE_LIST
)
4577 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4578 tf_warning_or_error
);
4580 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4581 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4582 /* Note: default conversion is only called in very special cases. */
4583 init
= decay_conversion (init
);
4585 /* Convert INIT to the reference type TYPE. This may involve the
4586 creation of a temporary, whose lifetime must be the same as that
4587 of the reference. If so, a DECL_EXPR for the temporary will be
4588 added just after the DECL_EXPR for DECL. That's why we don't set
4589 DECL_INITIAL for local references (instead assigning to them
4590 explicitly); we need to allow the temporary to be initialized
4592 tmp
= initialize_reference (type
, init
, decl
, cleanup
, tf_warning_or_error
);
4594 if (tmp
== error_mark_node
)
4596 else if (tmp
== NULL_TREE
)
4598 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
4602 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
4605 DECL_INITIAL (decl
) = tmp
;
4610 /* Subroutine of check_initializer. We're initializing a DECL of
4611 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4612 extend the lifetime of the underlying array to match that of the decl,
4613 just like for reference initialization. CLEANUP is as for
4614 grok_reference_init. */
4617 build_init_list_var_init (tree decl
, tree type
, tree init
, tree
*array_init
,
4620 tree aggr_init
, array
, arrtype
;
4621 init
= perform_implicit_conversion (type
, init
, tf_warning_or_error
);
4622 if (error_operand_p (init
))
4623 return error_mark_node
;
4625 aggr_init
= TARGET_EXPR_INITIAL (init
);
4626 array
= CONSTRUCTOR_ELT (aggr_init
, 0)->value
;
4627 arrtype
= TREE_TYPE (array
);
4629 gcc_assert (TREE_CODE (array
) == ADDR_EXPR
);
4630 array
= TREE_OPERAND (array
, 0);
4631 /* If the array is constant, finish_compound_literal already made it a
4632 static variable and we don't need to do anything here. */
4633 if (decl
&& TREE_CODE (array
) == TARGET_EXPR
)
4635 tree var
= set_up_extended_ref_temp (decl
, array
, cleanup
, array_init
);
4636 var
= build_address (var
);
4637 var
= convert (arrtype
, var
);
4638 CONSTRUCTOR_ELT (aggr_init
, 0)->value
= var
;
4643 /* Designated initializers in arrays are not supported in GNU C++.
4644 The parser cannot detect this error since it does not know whether
4645 a given brace-enclosed initializer is for a class type or for an
4646 array. This function checks that CE does not use a designated
4647 initializer. If it does, an error is issued. Returns true if CE
4648 is valid, i.e., does not have a designated initializer. */
4651 check_array_designated_initializer (const constructor_elt
*ce
)
4653 /* Designated initializers for array elements are not supported. */
4656 /* The parser only allows identifiers as designated
4658 if (ce
->index
== error_mark_node
)
4659 error ("name used in a GNU-style designated "
4660 "initializer for an array");
4661 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4662 /* An index added by reshape_init. */
4666 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4667 error ("name %qD used in a GNU-style designated "
4668 "initializer for an array", ce
->index
);
4676 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4677 array until we finish parsing the initializer. If that's the
4678 situation we're in, update DECL accordingly. */
4681 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4683 tree type
= TREE_TYPE (decl
);
4685 if (TREE_CODE (type
) == ARRAY_TYPE
4686 && TYPE_DOMAIN (type
) == NULL_TREE
4687 && TREE_CODE (decl
) != TYPE_DECL
)
4689 /* do_default is really a C-ism to deal with tentative definitions.
4690 But let's leave it here to ease the eventual merge. */
4691 int do_default
= !DECL_EXTERNAL (decl
);
4692 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4695 /* Check that there are no designated initializers in INIT, as
4696 those are not supported in GNU C++, and as the middle-end
4697 will crash if presented with a non-numeric designated
4699 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4701 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4702 constructor_elt
*ce
;
4704 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4705 if (!check_array_designated_initializer (ce
))
4711 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4715 error ("initializer fails to determine size of %qD", decl
);
4716 TREE_TYPE (decl
) = error_mark_node
;
4718 else if (failure
== 2)
4722 error ("array size missing in %qD", decl
);
4723 TREE_TYPE (decl
) = error_mark_node
;
4725 /* If a `static' var's size isn't known, make it extern as
4726 well as static, so it does not get allocated. If it's not
4727 `static', then don't mark it extern; finish_incomplete_decl
4728 will give it a default size and it will get allocated. */
4729 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4730 DECL_EXTERNAL (decl
) = 1;
4732 else if (failure
== 3)
4734 error ("zero-size array %qD", decl
);
4735 TREE_TYPE (decl
) = error_mark_node
;
4739 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4741 relayout_decl (decl
);
4745 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4746 any appropriate error messages regarding the layout. */
4749 layout_var_decl (tree decl
)
4753 type
= TREE_TYPE (decl
);
4754 if (type
== error_mark_node
)
4757 /* If we haven't already layed out this declaration, do so now.
4758 Note that we must not call complete type for an external object
4759 because it's type might involve templates that we are not
4760 supposed to instantiate yet. (And it's perfectly valid to say
4761 `extern X x' for some incomplete type `X'.) */
4762 if (!DECL_EXTERNAL (decl
))
4763 complete_type (type
);
4764 if (!DECL_SIZE (decl
)
4765 && TREE_TYPE (decl
) != error_mark_node
4766 && (COMPLETE_TYPE_P (type
)
4767 || (TREE_CODE (type
) == ARRAY_TYPE
4768 && !TYPE_DOMAIN (type
)
4769 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4770 layout_decl (decl
, 0);
4772 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4774 /* An automatic variable with an incomplete type: that is an error.
4775 Don't talk about array types here, since we took care of that
4776 message in grokdeclarator. */
4777 error ("storage size of %qD isn%'t known", decl
);
4778 TREE_TYPE (decl
) = error_mark_node
;
4781 /* Keep this code around in case we later want to control debug info
4782 based on whether a type is "used". (jason 1999-11-11) */
4784 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4785 /* Let debugger know it should output info for this type. */
4786 note_debug_info_needed (ttype
);
4788 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4789 note_debug_info_needed (DECL_CONTEXT (decl
));
4792 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4793 && DECL_SIZE (decl
) != NULL_TREE
4794 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4796 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4797 constant_expression_warning (DECL_SIZE (decl
));
4800 error ("storage size of %qD isn%'t constant", decl
);
4801 TREE_TYPE (decl
) = error_mark_node
;
4806 /* If a local static variable is declared in an inline function, or if
4807 we have a weak definition, we must endeavor to create only one
4808 instance of the variable at link-time. */
4811 maybe_commonize_var (tree decl
)
4813 /* Static data in a function with comdat linkage also has comdat
4815 if (TREE_STATIC (decl
)
4816 /* Don't mess with __FUNCTION__. */
4817 && ! DECL_ARTIFICIAL (decl
)
4818 && DECL_FUNCTION_SCOPE_P (decl
)
4819 && vague_linkage_p (DECL_CONTEXT (decl
)))
4823 /* With weak symbols, we simply make the variable COMDAT;
4824 that will cause copies in multiple translations units to
4826 comdat_linkage (decl
);
4830 if (DECL_INITIAL (decl
) == NULL_TREE
4831 || DECL_INITIAL (decl
) == error_mark_node
)
4833 /* Without weak symbols, we can use COMMON to merge
4834 uninitialized variables. */
4835 TREE_PUBLIC (decl
) = 1;
4836 DECL_COMMON (decl
) = 1;
4840 /* While for initialized variables, we must use internal
4841 linkage -- which means that multiple copies will not
4843 TREE_PUBLIC (decl
) = 0;
4844 DECL_COMMON (decl
) = 0;
4845 warning_at (input_location
, 0,
4846 "sorry: semantics of inline function static "
4847 "data %q+#D are wrong (you%'ll wind up "
4848 "with multiple copies)", decl
);
4849 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4850 " you can work around this by removing "
4855 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4856 /* Set it up again; we might have set DECL_INITIAL since the last
4858 comdat_linkage (decl
);
4861 /* Issue an error message if DECL is an uninitialized const variable. */
4864 check_for_uninitialized_const_var (tree decl
)
4866 tree type
= strip_array_types (TREE_TYPE (decl
));
4868 /* ``Unless explicitly declared extern, a const object does not have
4869 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4871 if (TREE_CODE (decl
) == VAR_DECL
4872 && TREE_CODE (type
) != REFERENCE_TYPE
4873 && CP_TYPE_CONST_P (type
)
4874 && (!TYPE_NEEDS_CONSTRUCTING (type
)
4875 || !type_has_user_provided_default_constructor (type
))
4876 && !DECL_INITIAL (decl
))
4878 permerror (DECL_SOURCE_LOCATION (decl
),
4879 "uninitialized const %qD", decl
);
4881 if (CLASS_TYPE_P (type
)
4882 && !type_has_user_provided_default_constructor (type
))
4884 tree defaulted_ctor
;
4886 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4887 "%q#T has no user-provided default constructor", type
);
4888 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4890 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4891 "constructor is not user-provided because it is "
4892 "explicitly defaulted in the class body");
4897 /* Structure holding the current initializer being processed by reshape_init.
4898 CUR is a pointer to the current element being processed, END is a pointer
4899 after the last element present in the initializer. */
4900 typedef struct reshape_iterator_t
4902 constructor_elt
*cur
;
4903 constructor_elt
*end
;
4906 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
4908 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4909 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4910 initialized. If there are no more such fields, the return value
4914 next_initializable_field (tree field
)
4917 && (TREE_CODE (field
) != FIELD_DECL
4918 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4919 || DECL_ARTIFICIAL (field
)))
4920 field
= DECL_CHAIN (field
);
4925 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4926 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4927 INTEGER_CST representing the size of the array minus one (the maximum index),
4928 or NULL_TREE if the array was declared without specifying the size. D is
4929 the iterator within the constructor. */
4932 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
4933 tsubst_flags_t complain
)
4936 bool sized_array_p
= (max_index
!= NULL_TREE
);
4937 unsigned HOST_WIDE_INT max_index_cst
= 0;
4938 unsigned HOST_WIDE_INT index
;
4940 /* The initializer for an array is always a CONSTRUCTOR. */
4941 new_init
= build_constructor (init_list_type_node
, NULL
);
4945 /* Minus 1 is used for zero sized arrays. */
4946 if (integer_all_onesp (max_index
))
4949 if (host_integerp (max_index
, 1))
4950 max_index_cst
= tree_low_cst (max_index
, 1);
4951 /* sizetype is sign extended, not zero extended. */
4953 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4957 /* Loop until there are no more initializers. */
4959 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4964 check_array_designated_initializer (d
->cur
);
4965 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
4967 if (elt_init
== error_mark_node
)
4968 return error_mark_node
;
4969 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
4970 size_int (index
), elt_init
);
4971 if (!TREE_CONSTANT (elt_init
))
4972 TREE_CONSTANT (new_init
) = false;
4978 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4979 Parameters are the same of reshape_init_r. */
4982 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
4984 tree max_index
= NULL_TREE
;
4986 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
4988 if (TYPE_DOMAIN (type
))
4989 max_index
= array_type_nelts (type
);
4991 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
4994 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4995 Parameters are the same of reshape_init_r. */
4998 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5000 tree max_index
= NULL_TREE
;
5002 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5004 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5006 tree value
= d
->cur
->value
;
5007 if (!same_type_p (TREE_TYPE (value
), type
))
5009 if (complain
& tf_error
)
5010 error ("invalid type %qT as initializer for a vector of type %qT",
5011 TREE_TYPE (d
->cur
->value
), type
);
5012 value
= error_mark_node
;
5018 /* For a vector, we initialize it as an array of the appropriate size. */
5019 if (TREE_CODE (type
) == VECTOR_TYPE
)
5020 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5022 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5025 /* Subroutine of reshape_init_r, processes the initializers for classes
5026 or union. Parameters are the same of reshape_init_r. */
5029 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5030 tsubst_flags_t complain
)
5035 gcc_assert (CLASS_TYPE_P (type
));
5037 /* The initializer for a class is always a CONSTRUCTOR. */
5038 new_init
= build_constructor (init_list_type_node
, NULL
);
5039 field
= next_initializable_field (TYPE_FIELDS (type
));
5045 An initializer for an aggregate member that is an
5046 empty class shall have the form of an empty
5047 initializer-list {}. */
5048 if (!first_initializer_p
)
5050 if (complain
& tf_error
)
5051 error ("initializer for %qT must be brace-enclosed", type
);
5052 return error_mark_node
;
5057 /* Loop through the initializable fields, gathering initializers. */
5058 while (d
->cur
!= d
->end
)
5062 /* Handle designated initializers, as an extension. */
5065 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5067 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5069 if (complain
& tf_error
)
5070 error ("%qT has no non-static data member named %qD", type
,
5072 return error_mark_node
;
5076 /* If we processed all the member of the class, we are done. */
5080 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5081 /*first_initializer_p=*/false, complain
);
5082 if (field_init
== error_mark_node
)
5083 return error_mark_node
;
5085 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5089 When a union is initialized with a brace-enclosed
5090 initializer, the braces shall only contain an
5091 initializer for the first member of the union. */
5092 if (TREE_CODE (type
) == UNION_TYPE
)
5095 field
= next_initializable_field (DECL_CHAIN (field
));
5101 /* Subroutine of reshape_init, which processes a single initializer (part of
5102 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5103 iterator within the CONSTRUCTOR which points to the initializer to process.
5104 FIRST_INITIALIZER_P is true if this is the first initializer of the
5105 outermost CONSTRUCTOR node. */
5108 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5109 tsubst_flags_t complain
)
5111 tree init
= d
->cur
->value
;
5113 if (error_operand_p (init
))
5114 return error_mark_node
;
5116 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5118 /* A complex type can be initialized from one or two initializers,
5119 but braces are not elided. */
5121 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5123 if (CONSTRUCTOR_NELTS (init
) > 2)
5125 if (complain
& tf_error
)
5126 error ("too many initializers for %qT", type
);
5128 return error_mark_node
;
5131 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5133 VEC(constructor_elt
, gc
) *v
= 0;
5134 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5135 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5137 init
= build_constructor (init_list_type_node
, v
);
5142 /* A non-aggregate type is always initialized with a single
5144 if (!CP_AGGREGATE_TYPE_P (type
))
5146 /* It is invalid to initialize a non-aggregate type with a
5147 brace-enclosed initializer before C++0x.
5148 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5149 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5150 a CONSTRUCTOR (with a record type). */
5151 if (TREE_CODE (init
) == CONSTRUCTOR
5152 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5154 if (SCALAR_TYPE_P (type
))
5156 if (complain
& tf_error
)
5157 error ("braces around scalar initializer for type %qT", type
);
5158 init
= error_mark_node
;
5161 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5170 All implicit type conversions (clause _conv_) are considered when
5171 initializing the aggregate member with an initializer from an
5172 initializer-list. If the initializer can initialize a member,
5173 the member is initialized. Otherwise, if the member is itself a
5174 non-empty subaggregate, brace elision is assumed and the
5175 initializer is considered for the initialization of the first
5176 member of the subaggregate. */
5177 if (TREE_CODE (init
) != CONSTRUCTOR
5178 /* But don't try this for the first initializer, since that would be
5179 looking through the outermost braces; A a2 = { a1 }; is not a
5180 valid aggregate initialization. */
5181 && !first_initializer_p
5182 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5183 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5189 /* [dcl.init.string]
5191 A char array (whether plain char, signed char, or unsigned char)
5192 can be initialized by a string-literal (optionally enclosed in
5193 braces); a wchar_t array can be initialized by a wide
5194 string-literal (optionally enclosed in braces). */
5195 if (TREE_CODE (type
) == ARRAY_TYPE
5196 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5198 tree str_init
= init
;
5200 /* Strip one level of braces if and only if they enclose a single
5201 element (as allowed by [dcl.init.string]). */
5202 if (!first_initializer_p
5203 && TREE_CODE (str_init
) == CONSTRUCTOR
5204 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5206 str_init
= VEC_index (constructor_elt
,
5207 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5210 /* If it's a string literal, then it's the initializer for the array
5211 as a whole. Otherwise, continue with normal initialization for
5212 array types (one value per array element). */
5213 if (TREE_CODE (str_init
) == STRING_CST
)
5220 /* The following cases are about aggregates. If we are not within a full
5221 initializer already, and there is not a CONSTRUCTOR, it means that there
5222 is a missing set of braces (that is, we are processing the case for
5223 which reshape_init exists). */
5224 if (!first_initializer_p
)
5226 if (TREE_CODE (init
) == CONSTRUCTOR
)
5228 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5229 /* There is no need to reshape pointer-to-member function
5230 initializers, as they are always constructed correctly
5231 by the front end. */
5233 else if (COMPOUND_LITERAL_P (init
))
5234 /* For a nested compound literal, there is no need to reshape since
5235 brace elision is not allowed. Even if we decided to allow it,
5236 we should add a call to reshape_init in finish_compound_literal,
5237 before calling digest_init, so changing this code would still
5238 not be necessary. */
5239 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5243 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5244 return reshape_init (type
, init
, complain
);
5248 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5252 /* Dispatch to specialized routines. */
5253 if (CLASS_TYPE_P (type
))
5254 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5255 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5256 return reshape_init_array (type
, d
, complain
);
5257 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5258 return reshape_init_vector (type
, d
, complain
);
5263 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5264 brace-enclosed aggregate initializer.
5266 INIT is the CONSTRUCTOR containing the list of initializers describing
5267 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5268 It may not presently match the shape of the TYPE; for example:
5270 struct S { int a; int b; };
5271 struct S a[] = { 1, 2, 3, 4 };
5273 Here INIT will hold a VEC of four elements, rather than a
5274 VEC of two elements, each itself a VEC of two elements. This
5275 routine transforms INIT from the former form into the latter. The
5276 revised CONSTRUCTOR node is returned. */
5279 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5281 VEC(constructor_elt
, gc
) *v
;
5285 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5287 v
= CONSTRUCTOR_ELTS (init
);
5289 /* An empty constructor does not need reshaping, and it is always a valid
5291 if (VEC_empty (constructor_elt
, v
))
5294 /* Recurse on this CONSTRUCTOR. */
5295 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5296 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5298 new_init
= reshape_init_r (type
, &d
, true, complain
);
5299 if (new_init
== error_mark_node
)
5300 return error_mark_node
;
5302 /* Make sure all the element of the constructor were used. Otherwise,
5303 issue an error about exceeding initializers. */
5306 if (complain
& tf_error
)
5307 error ("too many initializers for %qT", type
);
5309 return error_mark_node
;
5315 /* Verify array initializer. Returns true if errors have been reported. */
5318 check_array_initializer (tree decl
, tree type
, tree init
)
5320 tree element_type
= TREE_TYPE (type
);
5322 /* The array type itself need not be complete, because the
5323 initializer may tell us how many elements are in the array.
5324 But, the elements of the array must be complete. */
5325 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5328 error ("elements of array %q#D have incomplete type", decl
);
5330 error ("elements of array %q#T have incomplete type", type
);
5333 /* It is not valid to initialize a VLA. */
5335 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5336 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5339 error ("variable-sized object %qD may not be initialized", decl
);
5341 error ("variable-sized compound literal");
5347 /* Subroutine of check_initializer; args are passed down from that function.
5348 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5351 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5354 int saved_stmts_are_full_exprs_p
= 0;
5355 if (building_stmt_list_p ())
5357 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5358 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5360 init
= build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5361 if (building_stmt_list_p ())
5362 current_stmt_tree ()->stmts_are_full_exprs_p
=
5363 saved_stmts_are_full_exprs_p
;
5367 /* Verify INIT (the initializer for DECL), and record the
5368 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5369 grok_reference_init.
5371 If the return value is non-NULL, it is an expression that must be
5372 evaluated dynamically to initialize DECL. */
5375 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
5377 tree type
= TREE_TYPE (decl
);
5378 tree init_code
= NULL
;
5379 tree extra_init
= NULL_TREE
;
5382 /* Things that are going to be initialized need to have complete
5384 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5386 if (DECL_HAS_VALUE_EXPR_P (decl
))
5388 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5389 it doesn't have storage to be initialized. */
5390 gcc_assert (init
== NULL_TREE
);
5394 if (type
== error_mark_node
)
5395 /* We will have already complained. */
5398 if (TREE_CODE (type
) == ARRAY_TYPE
)
5400 if (check_array_initializer (decl
, type
, init
))
5403 else if (!COMPLETE_TYPE_P (type
))
5405 error ("%qD has incomplete type", decl
);
5406 TREE_TYPE (decl
) = error_mark_node
;
5410 /* There is no way to make a variable-sized class type in GNU C++. */
5411 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5413 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5415 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5416 if (SCALAR_TYPE_P (type
))
5420 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5421 init
= build_zero_init (type
, NULL_TREE
, false);
5423 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5425 error ("scalar object %qD requires one element in initializer",
5427 TREE_TYPE (decl
) = error_mark_node
;
5433 if (TREE_CODE (decl
) == CONST_DECL
)
5435 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5437 DECL_INITIAL (decl
) = init
;
5439 gcc_assert (init
!= NULL_TREE
);
5442 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5444 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
5445 init
= grok_reference_init (decl
, type
, init
, cleanup
);
5446 else if (init
|| type_build_ctor_call (type
))
5449 check_for_uninitialized_const_var (decl
);
5450 /* Do not reshape constructors of vectors (they don't need to be
5452 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5454 if (is_std_init_list (type
))
5455 init
= build_init_list_var_init (decl
, type
, init
,
5456 &extra_init
, cleanup
);
5457 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5459 /* Don't reshape if the class has constructors. */
5460 if (cxx_dialect
== cxx98
)
5461 error ("in C++98 %qD must be initialized by constructor, "
5465 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5467 error ("opaque vector types cannot be initialized");
5468 init
= error_mark_node
;
5472 init
= reshape_init (type
, init
, tf_warning_or_error
);
5473 if (cxx_dialect
>= cxx0x
&& SCALAR_TYPE_P (type
))
5474 check_narrowing (type
, init
);
5478 /* If DECL has an array type without a specific bound, deduce the
5479 array size from the initializer. */
5480 maybe_deduce_size_from_array_init (decl
, init
);
5481 type
= TREE_TYPE (decl
);
5482 if (type
== error_mark_node
)
5485 if (type_build_ctor_call (type
)
5486 || (CLASS_TYPE_P (type
)
5487 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))))
5489 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5491 /* If this is a constexpr initializer, expand_default_init will
5492 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5493 case, pull the initializer back out and pass it down into
5494 store_init_value. */
5495 while (TREE_CODE (init_code
) == EXPR_STMT
5496 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5497 init_code
= TREE_OPERAND (init_code
, 0);
5498 if (TREE_CODE (init_code
) == INIT_EXPR
)
5500 init
= TREE_OPERAND (init_code
, 1);
5501 init_code
= NULL_TREE
;
5502 /* Don't call digest_init; it's unnecessary and will complain
5503 about aggregate initialization of non-aggregate classes. */
5504 flags
|= LOOKUP_ALREADY_DIGESTED
;
5506 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5508 /* Declared constexpr, but no suitable initializer; massage
5509 init appropriately so we can pass it into store_init_value
5511 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5512 init
= finish_compound_literal (type
, init
,
5513 tf_warning_or_error
);
5514 else if (CLASS_TYPE_P (type
)
5515 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5517 init
= build_functional_cast (type
, init
, tf_none
);
5518 if (init
!= error_mark_node
)
5519 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5521 init_code
= NULL_TREE
;
5527 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5529 init_code
= store_init_value (decl
, init
, flags
);
5530 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5531 && DECL_INITIAL (decl
)
5532 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5533 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5534 warning (0, "array %qD initialized by parenthesized string literal %qE",
5535 decl
, DECL_INITIAL (decl
));
5541 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5542 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5543 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5544 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5547 check_for_uninitialized_const_var (decl
);
5550 if (init
&& init
!= error_mark_node
)
5551 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5554 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5556 if (init_code
&& DECL_IN_AGGR_P (decl
))
5558 static int explained
= 0;
5560 if (cxx_dialect
< cxx0x
)
5561 error ("initializer invalid for static member with constructor");
5563 error ("non-constant in-class initialization invalid for static "
5564 "member %qD", decl
);
5567 error ("(an out of class initialization is required)");
5575 /* If DECL is not a local variable, give it RTL. */
5578 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5580 int toplev
= toplevel_bindings_p ();
5582 const char *filename
;
5584 /* Set the DECL_ASSEMBLER_NAME for the object. */
5587 /* The `register' keyword, when used together with an
5588 asm-specification, indicates that the variable should be
5589 placed in a particular register. */
5590 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5592 set_user_assembler_name (decl
, asmspec
);
5593 DECL_HARD_REGISTER (decl
) = 1;
5597 if (TREE_CODE (decl
) == FUNCTION_DECL
5598 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5599 set_builtin_user_assembler_name (decl
, asmspec
);
5600 set_user_assembler_name (decl
, asmspec
);
5604 /* Handle non-variables up front. */
5605 if (TREE_CODE (decl
) != VAR_DECL
)
5607 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5611 /* If we see a class member here, it should be a static data
5613 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5615 gcc_assert (TREE_STATIC (decl
));
5616 /* An in-class declaration of a static data member should be
5617 external; it is only a declaration, and not a definition. */
5618 if (init
== NULL_TREE
)
5619 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5622 /* We don't create any RTL for local variables. */
5623 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5626 /* We defer emission of local statics until the corresponding
5627 DECL_EXPR is expanded. */
5628 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5630 /* We try to defer namespace-scope static constants so that they are
5631 not emitted into the object file unnecessarily. */
5632 filename
= input_filename
;
5633 if (!DECL_VIRTUAL_P (decl
)
5634 && TREE_READONLY (decl
)
5635 && DECL_INITIAL (decl
) != NULL_TREE
5636 && DECL_INITIAL (decl
) != error_mark_node
5638 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5640 && !TREE_PUBLIC (decl
))
5642 /* Fool with the linkage of static consts according to #pragma
5644 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5645 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5647 TREE_PUBLIC (decl
) = 1;
5648 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5653 /* Likewise for template instantiations. */
5654 else if (DECL_LANG_SPECIFIC (decl
)
5655 && DECL_IMPLICIT_INSTANTIATION (decl
))
5658 /* If we're not deferring, go ahead and assemble the variable. */
5660 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5663 /* walk_tree helper for wrap_temporary_cleanups, below. */
5666 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5668 if (TYPE_P (*stmt_p
))
5674 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5676 tree guard
= (tree
)data
;
5677 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5679 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5680 /* Tell honor_protect_cleanup_actions to handle this as a separate
5682 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5684 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5690 /* We're initializing a local variable which has a cleanup GUARD. If there
5691 are any temporaries used in the initializer INIT of this variable, we
5692 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5693 variable will be cleaned up properly if one of them throws.
5695 Unfortunately, there's no way to express this properly in terms of
5696 nesting, as the regions for the temporaries overlap the region for the
5697 variable itself; if there are two temporaries, the variable needs to be
5698 the first thing destroyed if either of them throws. However, we only
5699 want to run the variable's cleanup if it actually got constructed. So
5700 we need to guard the temporary cleanups with the variable's cleanup if
5701 they are run on the normal path, but not if they are run on the
5702 exceptional path. We implement this by telling
5703 honor_protect_cleanup_actions to strip the variable cleanup from the
5704 exceptional path. */
5707 wrap_temporary_cleanups (tree init
, tree guard
)
5709 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5712 /* Generate code to initialize DECL (a local variable). */
5715 initialize_local_var (tree decl
, tree init
)
5717 tree type
= TREE_TYPE (decl
);
5721 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5722 || TREE_CODE (decl
) == RESULT_DECL
);
5723 gcc_assert (!TREE_STATIC (decl
));
5725 if (DECL_SIZE (decl
) == NULL_TREE
)
5727 /* If we used it already as memory, it must stay in memory. */
5728 DECL_INITIAL (decl
) = NULL_TREE
;
5729 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5733 if (type
== error_mark_node
)
5736 /* Compute and store the initial value. */
5737 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5738 if (TREE_USED (type
))
5739 DECL_READ_P (decl
) = 1;
5741 /* Generate a cleanup, if necessary. */
5742 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5744 /* Perform the initialization. */
5747 if (TREE_CODE (init
) == INIT_EXPR
5748 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5750 /* Stick simple initializers in DECL_INITIAL so that
5751 -Wno-init-self works (c++/34772). */
5752 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5753 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5757 int saved_stmts_are_full_exprs_p
;
5759 /* If we're only initializing a single object, guard the
5760 destructors of any temporaries used in its initializer with
5761 its destructor. This isn't right for arrays because each
5762 element initialization is a full-expression. */
5763 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5764 wrap_temporary_cleanups (init
, cleanup
);
5766 gcc_assert (building_stmt_list_p ());
5767 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5768 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5769 finish_expr_stmt (init
);
5770 current_stmt_tree ()->stmts_are_full_exprs_p
=
5771 saved_stmts_are_full_exprs_p
;
5775 /* Set this to 0 so we can tell whether an aggregate which was
5776 initialized was ever used. Don't do this if it has a
5777 destructor, so we don't complain about the 'resource
5778 allocation is initialization' idiom. Now set
5779 attribute((unused)) on types so decls of that type will be
5780 marked used. (see TREE_USED, above.) */
5781 if (TYPE_NEEDS_CONSTRUCTING (type
)
5783 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5784 && DECL_NAME (decl
))
5785 TREE_USED (decl
) = 0;
5786 else if (already_used
)
5787 TREE_USED (decl
) = 1;
5790 finish_decl_cleanup (decl
, cleanup
);
5793 /* DECL is a VAR_DECL for a compiler-generated variable with static
5794 storage duration (like a virtual table) whose initializer is a
5795 compile-time constant. Initialize the variable and provide it to the
5799 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5802 gcc_assert (DECL_ARTIFICIAL (decl
));
5803 init
= build_constructor (TREE_TYPE (decl
), v
);
5804 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5805 DECL_INITIAL (decl
) = init
;
5806 DECL_INITIALIZED_P (decl
) = 1;
5807 determine_visibility (decl
);
5808 layout_var_decl (decl
);
5809 maybe_commonize_var (decl
);
5810 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5813 /* INIT is the initializer for a variable, as represented by the
5814 parser. Returns true iff INIT is type-dependent. */
5817 type_dependent_init_p (tree init
)
5819 if (TREE_CODE (init
) == TREE_LIST
)
5820 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5821 return any_type_dependent_elements_p (init
);
5822 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5823 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5825 VEC(constructor_elt
, gc
) *elts
;
5829 elts
= CONSTRUCTOR_ELTS (init
);
5830 nelts
= VEC_length (constructor_elt
, elts
);
5831 for (i
= 0; i
< nelts
; ++i
)
5832 if (type_dependent_init_p (VEC_index (constructor_elt
,
5837 /* It must be a simple expression, e.g., int i = 3; */
5838 return type_dependent_expression_p (init
);
5843 /* INIT is the initializer for a variable, as represented by the
5844 parser. Returns true iff INIT is value-dependent. */
5847 value_dependent_init_p (tree init
)
5849 if (TREE_CODE (init
) == TREE_LIST
)
5850 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5851 return any_value_dependent_elements_p (init
);
5852 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5853 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5855 VEC(constructor_elt
, gc
) *elts
;
5859 elts
= CONSTRUCTOR_ELTS (init
);
5860 nelts
= VEC_length (constructor_elt
, elts
);
5861 for (i
= 0; i
< nelts
; ++i
)
5862 if (value_dependent_init_p (VEC_index (constructor_elt
,
5867 /* It must be a simple expression, e.g., int i = 3; */
5868 return value_dependent_expression_p (init
);
5873 /* Finish processing of a declaration;
5874 install its line number and initial value.
5875 If the length of an array type is not known before,
5876 it must be determined now, from the initial value, or it is an error.
5878 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5879 true, then INIT is an integral constant expression.
5881 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5882 if the (init) syntax was used. */
5885 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5886 tree asmspec_tree
, int flags
)
5890 const char *asmspec
= NULL
;
5891 int was_readonly
= 0;
5892 bool var_definition_p
= false;
5895 if (decl
== error_mark_node
)
5900 error ("assignment (not initialization) in declaration");
5904 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5905 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5906 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5908 type
= TREE_TYPE (decl
);
5909 if (type
== error_mark_node
)
5912 /* Assume no cleanup is required. */
5913 cleanup
= NULL_TREE
;
5915 /* If a name was specified, get the string. */
5916 if (global_scope_p (current_binding_level
))
5917 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5918 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5919 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5921 if (current_class_type
5922 && CP_DECL_CONTEXT (decl
) == current_class_type
5923 && TYPE_BEING_DEFINED (current_class_type
)
5924 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
5925 && (DECL_INITIAL (decl
) || init
))
5926 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5928 auto_node
= type_uses_auto (type
);
5932 if (init
== NULL_TREE
)
5934 error ("declaration of %q#D has no initializer", decl
);
5935 TREE_TYPE (decl
) = error_mark_node
;
5939 if (TREE_CODE (d_init
) == TREE_LIST
)
5940 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
5941 tf_warning_or_error
);
5942 d_init
= resolve_nondeduced_context (d_init
);
5943 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
5945 if (type
== error_mark_node
)
5949 if (!ensure_literal_type_for_constexpr_object (decl
))
5950 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
5952 if (TREE_CODE (decl
) == VAR_DECL
5953 && DECL_CLASS_SCOPE_P (decl
)
5954 && DECL_INITIALIZED_IN_CLASS_P (decl
))
5955 check_static_variable_definition (decl
, type
);
5957 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
5960 if (init
== ridpointers
[(int)RID_DELETE
])
5962 /* FIXME check this is 1st decl. */
5963 DECL_DELETED_FN (decl
) = 1;
5964 DECL_DECLARED_INLINE_P (decl
) = 1;
5965 DECL_INITIAL (decl
) = error_mark_node
;
5966 FOR_EACH_CLONE (clone
, decl
)
5968 DECL_DELETED_FN (clone
) = 1;
5969 DECL_DECLARED_INLINE_P (clone
) = 1;
5970 DECL_INITIAL (clone
) = error_mark_node
;
5974 else if (init
== ridpointers
[(int)RID_DEFAULT
])
5976 if (defaultable_fn_check (decl
))
5977 DECL_DEFAULTED_FN (decl
) = 1;
5979 DECL_INITIAL (decl
) = NULL_TREE
;
5983 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
5985 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
5986 /* If DECL is a reference, then we want to know whether init is a
5987 reference constant; init_const_expr_p as passed tells us whether
5988 it's an rvalue constant. */
5989 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5990 init_const_expr_p
= potential_constant_expression (init
);
5991 if (init_const_expr_p
)
5993 /* Set these flags now for templates. We'll update the flags in
5994 store_init_value for instantiations. */
5995 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5996 if (decl_maybe_constant_var_p (decl
))
5997 TREE_CONSTANT (decl
) = 1;
6001 if (processing_template_decl
)
6003 bool type_dependent_p
;
6005 /* Add this declaration to the statement-tree. */
6006 if (at_function_scope_p ())
6007 add_decl_expr (decl
);
6009 type_dependent_p
= dependent_type_p (type
);
6011 if (check_for_bare_parameter_packs (init
))
6014 DECL_INITIAL (decl
) = NULL_TREE
;
6017 /* Generally, initializers in templates are expanded when the
6018 template is instantiated. But, if DECL is a variable constant
6019 then it can be used in future constant expressions, so its value
6020 must be available. */
6022 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6023 /* We can't do anything if the decl has dependent type. */;
6025 && init_const_expr_p
6026 && !type_dependent_p
6027 && decl_maybe_constant_var_p (decl
)
6028 && !type_dependent_init_p (init
)
6029 && !value_dependent_init_p (init
))
6031 /* This variable seems to be a non-dependent constant, so process
6032 its initializer. If check_initializer returns non-null the
6033 initialization wasn't constant after all. */
6034 tree init_code
= check_initializer (decl
, init
, flags
, &cleanup
);
6035 if (init_code
== NULL_TREE
)
6038 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6039 /* Deduce array size even if the initializer is dependent. */
6040 maybe_deduce_size_from_array_init (decl
, init
);
6043 DECL_INITIAL (decl
) = init
;
6047 /* Take care of TYPE_DECLs up front. */
6048 if (TREE_CODE (decl
) == TYPE_DECL
)
6050 if (type
!= error_mark_node
6051 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6053 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6054 warning (0, "shadowing previous type declaration of %q#D", decl
);
6055 set_identifier_type_value (DECL_NAME (decl
), decl
);
6058 /* If we have installed this as the canonical typedef for this
6059 type, and that type has not been defined yet, delay emitting
6060 the debug information for it, as we will emit it later. */
6061 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6062 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6063 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6065 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6070 /* A reference will be modified here, as it is initialized. */
6071 if (! DECL_EXTERNAL (decl
)
6072 && TREE_READONLY (decl
)
6073 && TREE_CODE (type
) == REFERENCE_TYPE
)
6076 TREE_READONLY (decl
) = 0;
6079 if (TREE_CODE (decl
) == VAR_DECL
)
6081 /* Only variables with trivial initialization and destruction can
6082 have thread-local storage. */
6083 if (DECL_THREAD_LOCAL_P (decl
)
6084 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
6085 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
6086 error ("%qD cannot be thread-local because it has non-trivial "
6087 "type %qT", decl
, TREE_TYPE (decl
));
6088 /* If this is a local variable that will need a mangled name,
6089 register it now. We must do this before processing the
6090 initializer for the variable, since the initialization might
6091 require a guard variable, and since the mangled name of the
6092 guard variable will depend on the mangled name of this
6094 if (DECL_FUNCTION_SCOPE_P (decl
)
6095 && TREE_STATIC (decl
)
6096 && !DECL_ARTIFICIAL (decl
))
6098 push_local_name (decl
);
6099 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6100 || DECL_DESTRUCTOR_P (current_function_decl
))
6101 /* Normally local_decls is populated during GIMPLE lowering,
6102 but [cd]tors are never actually compiled directly. We need
6103 to put statics on the list so we can deal with the label
6104 address extension. */
6105 add_local_decl (cfun
, decl
);
6108 /* Convert the initializer to the type of DECL, if we have not
6109 already initialized DECL. */
6110 if (!DECL_INITIALIZED_P (decl
)
6111 /* If !DECL_EXTERNAL then DECL is being defined. In the
6112 case of a static data member initialized inside the
6113 class-specifier, there can be an initializer even if DECL
6114 is *not* defined. */
6115 && (!DECL_EXTERNAL (decl
) || init
))
6117 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6120 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6121 /* Allow libjava/prims.cc define primitive classes. */
6122 if (init
!= NULL_TREE
6123 || jclass
== NULL_TREE
6124 || TREE_CODE (jclass
) != TYPE_DECL
6125 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6126 || !same_type_ignoring_top_level_qualifiers_p
6127 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6128 error ("Java object %qD not allocated with %<new%>", decl
);
6131 init
= check_initializer (decl
, init
, flags
, &cleanup
);
6132 /* Thread-local storage cannot be dynamically initialized. */
6133 if (DECL_THREAD_LOCAL_P (decl
) && init
)
6135 error ("%qD is thread-local and so cannot be dynamically "
6136 "initialized", decl
);
6140 /* Check that the initializer for a static data member was a
6141 constant. Although we check in the parser that the
6142 initializer is an integral constant expression, we do not
6143 simplify division-by-zero at the point at which it
6144 occurs. Therefore, in:
6146 struct S { static const int i = 7 / 0; };
6148 we issue an error at this point. It would
6149 probably be better to forbid division by zero in
6150 integral constant expressions. */
6151 if (DECL_EXTERNAL (decl
) && init
)
6153 error ("%qD cannot be initialized by a non-constant expression"
6154 " when being declared", decl
);
6155 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6163 The memory occupied by any object of static storage
6164 duration is zero-initialized at program startup before
6165 any other initialization takes place.
6167 We cannot create an appropriate initializer until after
6168 the type of DECL is finalized. If DECL_INITIAL is set,
6169 then the DECL is statically initialized, and any
6170 necessary zero-initialization has already been performed. */
6171 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6172 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6173 /*nelts=*/NULL_TREE
,
6174 /*static_storage_p=*/true);
6175 /* Remember that the initialization for this variable has
6177 DECL_INITIALIZED_P (decl
) = 1;
6178 /* This declaration is the definition of this variable,
6179 unless we are initializing a static data member within
6180 the class specifier. */
6181 if (!DECL_EXTERNAL (decl
))
6182 var_definition_p
= true;
6184 /* If the variable has an array type, lay out the type, even if
6185 there is no initializer. It is valid to index through the
6186 array, and we must get TYPE_ALIGN set correctly on the array
6188 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6191 if (TREE_STATIC (decl
)
6192 && !at_function_scope_p ()
6193 && current_function_decl
== NULL
)
6194 /* So decl is a global variable or a static member of a
6195 non local class. Record the types it uses
6196 so that we can decide later to emit debug info for them. */
6197 record_types_used_by_current_var_decl (decl
);
6199 else if (TREE_CODE (decl
) == FIELD_DECL
6200 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6201 error ("non-static data member %qD has Java class type", decl
);
6203 /* Add this declaration to the statement-tree. This needs to happen
6204 after the call to check_initializer so that the DECL_EXPR for a
6205 reference temp is added before the DECL_EXPR for the reference itself. */
6206 if (DECL_FUNCTION_SCOPE_P (decl
))
6207 add_decl_expr (decl
);
6209 /* Let the middle end know about variables and functions -- but not
6210 static data members in uninstantiated class templates. */
6211 if (TREE_CODE (decl
) == VAR_DECL
6212 || TREE_CODE (decl
) == FUNCTION_DECL
)
6214 if (TREE_CODE (decl
) == VAR_DECL
)
6216 layout_var_decl (decl
);
6217 maybe_commonize_var (decl
);
6220 /* This needs to happen after the linkage is set. */
6221 determine_visibility (decl
);
6223 if (var_definition_p
&& TREE_STATIC (decl
))
6225 /* If a TREE_READONLY variable needs initialization
6226 at runtime, it is no longer readonly and we need to
6227 avoid MEM_READONLY_P being set on RTL created for it. */
6230 if (TREE_READONLY (decl
))
6231 TREE_READONLY (decl
) = 0;
6234 else if (was_readonly
)
6235 TREE_READONLY (decl
) = 1;
6238 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6240 /* Check for abstractness of the type. Notice that there is no
6241 need to strip array types here since the check for those types
6242 is already done within create_array_type_for_decl. */
6243 if (TREE_CODE (type
) == FUNCTION_TYPE
6244 || TREE_CODE (type
) == METHOD_TYPE
)
6245 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6247 abstract_virtuals_error (decl
, type
);
6249 if (TREE_TYPE (decl
) == error_mark_node
)
6250 /* No initialization required. */
6252 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6256 if (init
== ridpointers
[(int)RID_DEFAULT
])
6258 /* An out-of-class default definition is defined at
6259 the point where it is explicitly defaulted. */
6260 if (DECL_DELETED_FN (decl
))
6261 maybe_explain_implicit_delete (decl
);
6262 else if (DECL_INITIAL (decl
) == error_mark_node
)
6263 synthesize_method (decl
);
6266 error ("function %q#D is initialized like a variable", decl
);
6268 /* else no initialization required. */
6270 else if (DECL_EXTERNAL (decl
)
6271 && ! (DECL_LANG_SPECIFIC (decl
)
6272 && DECL_NOT_REALLY_EXTERN (decl
)))
6275 DECL_INITIAL (decl
) = init
;
6277 /* A variable definition. */
6278 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6279 /* Initialize the local variable. */
6280 initialize_local_var (decl
, init
);
6282 /* If a variable is defined, and then a subsequent
6283 definition with external linkage is encountered, we will
6284 get here twice for the same variable. We want to avoid
6285 calling expand_static_init more than once. For variables
6286 that are not static data members, we can call
6287 expand_static_init only when we actually process the
6288 initializer. It is not legal to redeclare a static data
6289 member, so this issue does not arise in that case. */
6290 else if (var_definition_p
&& TREE_STATIC (decl
))
6291 expand_static_init (decl
, init
);
6294 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6295 reference, insert it in the statement-tree now. */
6297 push_cleanup (decl
, cleanup
, false);
6300 TREE_READONLY (decl
) = 1;
6303 /* Returns a declaration for a VAR_DECL as if:
6305 extern "C" TYPE NAME;
6307 had been seen. Used to create compiler-generated global
6311 declare_global_var (tree name
, tree type
)
6315 push_to_top_level ();
6316 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6317 TREE_PUBLIC (decl
) = 1;
6318 DECL_EXTERNAL (decl
) = 1;
6319 DECL_ARTIFICIAL (decl
) = 1;
6320 /* If the user has explicitly declared this variable (perhaps
6321 because the code we are compiling is part of a low-level runtime
6322 library), then it is possible that our declaration will be merged
6323 with theirs by pushdecl. */
6324 decl
= pushdecl (decl
);
6325 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6326 pop_from_top_level ();
6331 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6332 if "__cxa_atexit" is not being used) corresponding to the function
6333 to be called when the program exits. */
6336 get_atexit_fn_ptr_type (void)
6340 if (!atexit_fn_ptr_type_node
)
6343 if (flag_use_cxa_atexit
6344 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6345 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6346 arg_type
= ptr_type_node
;
6348 /* The parameter to "atexit" is "void (*)(void)". */
6349 arg_type
= NULL_TREE
;
6351 fn_type
= build_function_type_list (void_type_node
,
6352 arg_type
, NULL_TREE
);
6353 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6356 return atexit_fn_ptr_type_node
;
6359 /* Returns a pointer to the `atexit' function. Note that if
6360 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6361 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6364 get_atexit_node (void)
6370 bool use_aeabi_atexit
;
6375 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6377 /* The declaration for `__cxa_atexit' is:
6379 int __cxa_atexit (void (*)(void *), void *, void *)
6381 We build up the argument types and then the function type
6383 tree argtype0
, argtype1
, argtype2
;
6385 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6386 /* First, build the pointer-to-function type for the first
6388 fn_ptr_type
= get_atexit_fn_ptr_type ();
6389 /* Then, build the rest of the argument types. */
6390 argtype2
= ptr_type_node
;
6391 if (use_aeabi_atexit
)
6393 argtype1
= fn_ptr_type
;
6394 argtype0
= ptr_type_node
;
6398 argtype1
= ptr_type_node
;
6399 argtype0
= fn_ptr_type
;
6401 /* And the final __cxa_atexit type. */
6402 fn_type
= build_function_type_list (integer_type_node
,
6403 argtype0
, argtype1
, argtype2
,
6405 fn_ptr_type
= build_pointer_type (fn_type
);
6406 if (use_aeabi_atexit
)
6407 name
= "__aeabi_atexit";
6409 name
= "__cxa_atexit";
6413 /* The declaration for `atexit' is:
6415 int atexit (void (*)());
6417 We build up the argument types and then the function type
6419 fn_ptr_type
= get_atexit_fn_ptr_type ();
6420 /* Build the final atexit type. */
6421 fn_type
= build_function_type_list (integer_type_node
,
6422 fn_ptr_type
, NULL_TREE
);
6426 /* Now, build the function declaration. */
6427 push_lang_context (lang_name_c
);
6428 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6429 mark_used (atexit_fndecl
);
6430 pop_lang_context ();
6431 atexit_node
= decay_conversion (atexit_fndecl
);
6436 /* Returns the __dso_handle VAR_DECL. */
6439 get_dso_handle_node (void)
6441 if (dso_handle_node
)
6442 return dso_handle_node
;
6444 /* Declare the variable. */
6445 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6448 #ifdef HAVE_GAS_HIDDEN
6449 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6450 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6453 return dso_handle_node
;
6456 /* Begin a new function with internal linkage whose job will be simply
6457 to destroy some particular variable. */
6459 static GTY(()) int start_cleanup_cnt
;
6462 start_cleanup_fn (void)
6467 bool use_cxa_atexit
= flag_use_cxa_atexit
6468 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6470 push_to_top_level ();
6472 /* No need to mangle this. */
6473 push_lang_context (lang_name_c
);
6475 /* Build the name of the function. */
6476 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6477 /* Build the function declaration. */
6478 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6479 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6480 /* It's a function with internal linkage, generated by the
6482 TREE_PUBLIC (fndecl
) = 0;
6483 DECL_ARTIFICIAL (fndecl
) = 1;
6484 /* Make the function `inline' so that it is only emitted if it is
6485 actually needed. It is unlikely that it will be inlined, since
6486 it is only called via a function pointer, but we avoid unnecessary
6487 emissions this way. */
6488 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6489 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6490 /* Build the parameter. */
6495 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6496 DECL_CONTEXT (parmdecl
) = fndecl
;
6497 TREE_USED (parmdecl
) = 1;
6498 DECL_READ_P (parmdecl
) = 1;
6499 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6503 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6505 pop_lang_context ();
6507 return current_function_decl
;
6510 /* Finish the cleanup function begun by start_cleanup_fn. */
6513 end_cleanup_fn (void)
6515 expand_or_defer_fn (finish_function (0));
6517 pop_from_top_level ();
6520 /* Generate code to handle the destruction of DECL, an object with
6521 static storage duration. */
6524 register_dtor_fn (tree decl
)
6531 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6533 type
= TREE_TYPE (decl
);
6534 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6535 return void_zero_node
;
6537 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6538 a class object, we can just pass the destructor to
6539 "__cxa_atexit"; we don't have to build a temporary function to do
6541 use_dtor
= (flag_use_cxa_atexit
6542 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6543 && CLASS_TYPE_P (type
));
6548 /* Find the destructor. */
6549 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6550 gcc_assert (idx
>= 0);
6551 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6552 /* Make sure it is accessible. */
6553 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6557 /* Call build_cleanup before we enter the anonymous function so
6558 that any access checks will be done relative to the current
6559 scope, rather than the scope of the anonymous function. */
6560 build_cleanup (decl
);
6562 /* Now start the function. */
6563 cleanup
= start_cleanup_fn ();
6565 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6566 to the original function, rather than the anonymous one. That
6567 will make the back end think that nested functions are in use,
6568 which causes confusion. */
6569 push_deferring_access_checks (dk_no_check
);
6570 fcall
= build_cleanup (decl
);
6571 pop_deferring_access_checks ();
6573 /* Create the body of the anonymous function. */
6574 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6575 finish_expr_stmt (fcall
);
6576 finish_compound_stmt (compound_stmt
);
6580 /* Call atexit with the cleanup function. */
6581 mark_used (cleanup
);
6582 cleanup
= build_address (cleanup
);
6583 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6589 /* We must convert CLEANUP to the type that "__cxa_atexit"
6591 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6592 /* "__cxa_atexit" will pass the address of DECL to the
6593 cleanup function. */
6595 addr
= build_address (decl
);
6596 /* The declared type of the parameter to "__cxa_atexit" is
6597 "void *". For plain "T*", we could just let the
6598 machinery in cp_build_function_call convert it -- but if the
6599 type is "cv-qualified T *", then we need to convert it
6600 before passing it in, to avoid spurious errors. */
6601 addr
= build_nop (ptr_type_node
, addr
);
6604 /* Since the cleanup functions we build ignore the address
6605 they're given, there's no reason to pass the actual address
6606 in, and, in general, it's cheaper to pass NULL than any
6608 addr
= null_pointer_node
;
6609 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6610 tf_warning_or_error
);
6611 if (targetm
.cxx
.use_aeabi_atexit ())
6624 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6625 arg0
, arg1
, arg2
, NULL_TREE
);
6628 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6629 is its initializer. Generate code to handle the construction
6630 and destruction of DECL. */
6633 expand_static_init (tree decl
, tree init
)
6635 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6636 gcc_assert (TREE_STATIC (decl
));
6638 /* Some variables require no dynamic initialization. */
6640 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6643 if (DECL_FUNCTION_SCOPE_P (decl
))
6645 /* Emit code to perform this initialization but once. */
6646 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6647 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6648 tree guard
, guard_addr
;
6651 /* Emit code to perform this initialization but once. This code
6654 static <type> guard;
6655 if (!guard.first_byte) {
6656 if (__cxa_guard_acquire (&guard)) {
6659 // Do initialization.
6660 flag = true; __cxa_guard_release (&guard);
6661 // Register variable for destruction at end of program.
6663 if (!flag) __cxa_guard_abort (&guard);
6667 Note that the `flag' variable is only set to 1 *after* the
6668 initialization is complete. This ensures that an exception,
6669 thrown during the construction, will cause the variable to
6670 reinitialized when we pass through this code again, as per:
6674 If the initialization exits by throwing an exception, the
6675 initialization is not complete, so it will be tried again
6676 the next time control enters the declaration.
6678 This process should be thread-safe, too; multiple threads
6679 should not be able to initialize the variable more than
6682 /* Create the guard variable. */
6683 guard
= get_guard (decl
);
6685 /* This optimization isn't safe on targets with relaxed memory
6686 consistency. On such targets we force synchronization in
6687 __cxa_guard_acquire. */
6688 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6690 /* Begin the conditional initialization. */
6691 if_stmt
= begin_if_stmt ();
6692 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6693 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6696 if (flag_threadsafe_statics
)
6698 tree vfntype
= NULL_TREE
;
6699 tree acquire_name
, release_name
, abort_name
;
6700 tree acquire_fn
, release_fn
, abort_fn
;
6701 guard_addr
= build_address (guard
);
6703 acquire_name
= get_identifier ("__cxa_guard_acquire");
6704 release_name
= get_identifier ("__cxa_guard_release");
6705 abort_name
= get_identifier ("__cxa_guard_abort");
6706 acquire_fn
= identifier_global_value (acquire_name
);
6707 release_fn
= identifier_global_value (release_name
);
6708 abort_fn
= identifier_global_value (abort_name
);
6710 acquire_fn
= push_library_fn
6711 (acquire_name
, build_function_type_list (integer_type_node
,
6712 TREE_TYPE (guard_addr
),
6715 if (!release_fn
|| !abort_fn
)
6716 vfntype
= build_function_type_list (void_type_node
,
6717 TREE_TYPE (guard_addr
),
6720 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6722 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6724 inner_if_stmt
= begin_if_stmt ();
6725 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6728 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6729 begin
= get_target_expr (boolean_false_node
);
6730 flag
= TARGET_EXPR_SLOT (begin
);
6732 TARGET_EXPR_CLEANUP (begin
)
6733 = build3 (COND_EXPR
, void_type_node
, flag
,
6735 build_call_n (abort_fn
, 1, guard_addr
));
6736 CLEANUP_EH_ONLY (begin
) = 1;
6738 /* Do the initialization itself. */
6739 init
= add_stmt_to_compound (begin
, init
);
6740 init
= add_stmt_to_compound
6741 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6742 init
= add_stmt_to_compound
6743 (init
, build_call_n (release_fn
, 1, guard_addr
));
6746 init
= add_stmt_to_compound (init
, set_guard (guard
));
6748 /* Use atexit to register a function for destroying this static
6750 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6752 finish_expr_stmt (init
);
6754 if (flag_threadsafe_statics
)
6756 finish_compound_stmt (inner_then_clause
);
6757 finish_then_clause (inner_if_stmt
);
6758 finish_if_stmt (inner_if_stmt
);
6761 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6763 finish_compound_stmt (then_clause
);
6764 finish_then_clause (if_stmt
);
6765 finish_if_stmt (if_stmt
);
6769 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6773 /* Make TYPE a complete type based on INITIAL_VALUE.
6774 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6775 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6776 3 if the initializer list is empty (in pedantic mode). */
6779 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6782 tree type
, elt_type
;
6786 unsigned HOST_WIDE_INT i
;
6789 /* An array of character type can be initialized from a
6790 brace-enclosed string constant.
6792 FIXME: this code is duplicated from reshape_init. Probably
6793 we should just call reshape_init here? */
6794 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6795 && TREE_CODE (initial_value
) == CONSTRUCTOR
6796 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6798 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6799 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6801 if (TREE_CODE (value
) == STRING_CST
6802 && VEC_length (constructor_elt
, v
) == 1)
6803 initial_value
= value
;
6806 /* If any of the elements are parameter packs, we can't actually
6807 complete this type now because the array size is dependent. */
6808 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6810 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6813 if (PACK_EXPANSION_P (value
))
6819 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6821 /* We can create the array before the element type is complete, which
6822 means that we didn't have these two bits set in the original type
6823 either. In completing the type, we are expected to propagate these
6824 bits. See also complete_type which does the same thing for arrays
6827 if (TYPE_DOMAIN (type
))
6829 elt_type
= TREE_TYPE (type
);
6830 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6831 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6832 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6838 /* As above, but either give an error or reject zero-size arrays, depending
6842 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
6843 bool do_default
, tsubst_flags_t complain
)
6846 bool sfinae
= !(complain
& tf_error
);
6847 /* In SFINAE context we can't be lenient about zero-size arrays. */
6850 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
6856 /* Not an error. */;
6857 else if (failure
== 1)
6858 error ("initializer fails to determine size of %qT", *ptype
);
6859 else if (failure
== 2)
6862 error ("array size missing in %qT", *ptype
);
6864 else if (failure
== 3)
6865 error ("zero-size array %qT", *ptype
);
6866 *ptype
= error_mark_node
;
6871 /* Return zero if something is declared to be a member of type
6872 CTYPE when in the context of CUR_TYPE. STRING is the error
6873 message to print in that case. Otherwise, quietly return 1. */
6876 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6878 if (ctype
&& ctype
!= cur_type
)
6880 if (flags
== DTOR_FLAG
)
6881 error ("destructor for alien class %qT cannot be a member", ctype
);
6883 error ("constructor for alien class %qT cannot be a member", ctype
);
6889 /* Subroutine of `grokdeclarator'. */
6891 /* Generate errors possibly applicable for a given set of specifiers.
6892 This is for ARM $7.1.2. */
6895 bad_specifiers (tree object
,
6896 enum bad_spec_place type
,
6907 error ("%qD declared as a %<virtual%> variable", object
);
6909 error ("%qD declared as an %<inline%> variable", object
);
6911 error ("%<const%> and %<volatile%> function specifiers on "
6912 "%qD invalid in variable declaration", object
);
6916 error ("%qD declared as a %<virtual%> parameter", object
);
6918 error ("%qD declared as an %<inline%> parameter", object
);
6920 error ("%<const%> and %<volatile%> function specifiers on "
6921 "%qD invalid in parameter declaration", object
);
6925 error ("%qD declared as a %<virtual%> type", object
);
6927 error ("%qD declared as an %<inline%> type", object
);
6929 error ("%<const%> and %<volatile%> function specifiers on "
6930 "%qD invalid in type declaration", object
);
6934 error ("%qD declared as a %<virtual%> field", object
);
6936 error ("%qD declared as an %<inline%> field", object
);
6938 error ("%<const%> and %<volatile%> function specifiers on "
6939 "%qD invalid in field declaration", object
);
6945 error ("%q+D declared as a friend", object
);
6947 && (TREE_CODE (object
) == TYPE_DECL
6948 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
6949 && !TYPE_REFFN_P (TREE_TYPE (object
))
6950 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
6951 error ("%q+D declared with an exception specification", object
);
6954 /* DECL is a member function or static data member and is presently
6955 being defined. Check that the definition is taking place in a
6959 check_class_member_definition_namespace (tree decl
)
6961 /* These checks only apply to member functions and static data
6963 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
6964 || TREE_CODE (decl
) == VAR_DECL
);
6965 /* We check for problems with specializations in pt.c in
6966 check_specialization_namespace, where we can issue better
6968 if (processing_specialization
)
6970 /* There are no restrictions on the placement of
6971 explicit instantiations. */
6972 if (processing_explicit_instantiation
)
6976 A member function definition that appears outside of the
6977 class definition shall appear in a namespace scope enclosing
6978 the class definition.
6982 The definition for a static data member shall appear in a
6983 namespace scope enclosing the member's class definition. */
6984 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
6985 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
6986 decl
, DECL_CONTEXT (decl
));
6989 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6990 METHOD_TYPE for a non-static member function; QUALS are the
6991 cv-qualifiers that apply to the function. */
6994 build_this_parm (tree type
, cp_cv_quals quals
)
6999 cp_cv_quals this_quals
;
7001 if (CLASS_TYPE_P (type
))
7004 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7005 this_type
= build_pointer_type (this_type
);
7008 this_type
= type_of_this_parm (type
);
7009 /* The `this' parameter is implicitly `const'; it cannot be
7011 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7012 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7013 parm
= build_artificial_parm (this_identifier
, qual_type
);
7014 cp_apply_type_quals_to_decl (this_quals
, parm
);
7018 /* DECL is a static member function. Complain if it was declared
7019 with function-cv-quals. */
7022 check_static_quals (tree decl
, cp_cv_quals quals
)
7024 if (quals
!= TYPE_UNQUALIFIED
)
7025 error ("static member function %q#D declared with type qualifiers",
7029 /* CTYPE is class type, or null if non-class.
7030 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7032 DECLARATOR is the function's name.
7033 PARMS is a chain of PARM_DECLs for the function.
7034 VIRTUALP is truthvalue of whether the function is virtual or not.
7035 FLAGS are to be passed through to `grokclassfn'.
7036 QUALS are qualifiers indicating whether the function is `const'
7038 RAISES is a list of exceptions that this function can raise.
7039 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7040 not look, and -1 if we should not call `grokclassfn' at all.
7042 SFK is the kind of special function (if any) for the new function.
7044 Returns `NULL_TREE' if something goes wrong, after issuing
7045 applicable error messages. */
7048 grokfndecl (tree ctype
,
7052 tree orig_declarator
,
7054 enum overload_flags flags
,
7061 special_function_kind sfk
,
7066 location_t location
)
7069 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7073 type
= build_exception_variant (type
, raises
);
7075 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7077 /* If we have an explicit location, use it, otherwise use whatever
7078 build_lang_decl used (probably input_location). */
7079 if (location
!= UNKNOWN_LOCATION
)
7080 DECL_SOURCE_LOCATION (decl
) = location
;
7082 if (TREE_CODE (type
) == METHOD_TYPE
)
7085 parm
= build_this_parm (type
, quals
);
7086 DECL_CHAIN (parm
) = parms
;
7089 DECL_ARGUMENTS (decl
) = parms
;
7090 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7091 DECL_CONTEXT (t
) = decl
;
7092 /* Propagate volatile out from type to decl. */
7093 if (TYPE_VOLATILE (type
))
7094 TREE_THIS_VOLATILE (decl
) = 1;
7096 /* Setup decl according to sfk. */
7099 case sfk_constructor
:
7100 case sfk_copy_constructor
:
7101 case sfk_move_constructor
:
7102 DECL_CONSTRUCTOR_P (decl
) = 1;
7104 case sfk_destructor
:
7105 DECL_DESTRUCTOR_P (decl
) = 1;
7111 /* If pointers to member functions use the least significant bit to
7112 indicate whether a function is virtual, ensure a pointer
7113 to this function will have that bit clear. */
7114 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7115 && TREE_CODE (type
) == METHOD_TYPE
7116 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7117 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7120 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7124 ("defining explicit specialization %qD in friend declaration",
7128 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7129 tree args
= TREE_OPERAND (orig_declarator
, 1);
7131 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7133 /* Something like `template <class T> friend void f<T>()'. */
7134 error ("invalid use of template-id %qD in declaration "
7135 "of primary template",
7141 /* A friend declaration of the form friend void f<>(). Record
7142 the information in the TEMPLATE_ID_EXPR. */
7143 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7145 if (TREE_CODE (fns
) == COMPONENT_REF
)
7147 /* Due to bison parser ickiness, we will have already looked
7148 up an operator_name or PFUNCNAME within the current class
7149 (see template_id in parse.y). If the current class contains
7150 such a name, we'll get a COMPONENT_REF here. Undo that. */
7152 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7153 == current_class_type
);
7154 fns
= TREE_OPERAND (fns
, 1);
7156 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7157 || TREE_CODE (fns
) == OVERLOAD
);
7158 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7160 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7161 if (TREE_PURPOSE (t
)
7162 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7164 error ("default arguments are not allowed in declaration "
7165 "of friend template specialization %qD",
7172 error ("%<inline%> is not allowed in declaration of friend "
7173 "template specialization %qD",
7180 /* If this decl has namespace scope, set that up. */
7182 set_decl_namespace (decl
, in_namespace
, friendp
);
7184 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7186 /* `main' and builtins have implicit 'C' linkage. */
7187 if ((MAIN_NAME_P (declarator
)
7188 || (IDENTIFIER_LENGTH (declarator
) > 10
7189 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7190 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7191 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7192 && current_lang_name
== lang_name_cplusplus
7193 && ctype
== NULL_TREE
7194 && DECL_FILE_SCOPE_P (decl
))
7195 SET_DECL_LANGUAGE (decl
, lang_c
);
7197 /* Should probably propagate const out from type to decl I bet (mrs). */
7200 DECL_STATIC_FUNCTION_P (decl
) = 1;
7201 DECL_CONTEXT (decl
) = ctype
;
7206 DECL_CONTEXT (decl
) = ctype
;
7208 check_class_member_definition_namespace (decl
);
7211 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7213 if (processing_template_decl
)
7214 error ("cannot declare %<::main%> to be a template");
7216 error ("cannot declare %<::main%> to be inline");
7218 error ("cannot declare %<::main%> to be static");
7223 /* Members of anonymous types and local classes have no linkage; make
7224 them internal. If a typedef is made later, this will be changed. */
7225 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7226 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7229 if (publicp
&& cxx_dialect
== cxx98
)
7231 /* [basic.link]: A name with no linkage (notably, the name of a class
7232 or enumeration declared in a local scope) shall not be used to
7233 declare an entity with linkage.
7235 DR 757 relaxes this restriction for C++0x. */
7236 t
= no_linkage_check (TREE_TYPE (decl
),
7237 /*relaxed_p=*/false);
7240 if (TYPE_ANONYMOUS_P (t
))
7242 if (DECL_EXTERN_C_P (decl
))
7243 /* Allow this; it's pretty common in C. */;
7246 permerror (input_location
, "anonymous type with no linkage "
7247 "used to declare function %q#D with linkage",
7249 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7250 permerror (input_location
, "%q+#D does not refer to the unqualified "
7251 "type, so it is not used for linkage",
7256 permerror (input_location
, "type %qT with no linkage used to "
7257 "declare function %q#D with linkage", t
, decl
);
7261 TREE_PUBLIC (decl
) = publicp
;
7264 DECL_INTERFACE_KNOWN (decl
) = 1;
7265 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7268 /* If the declaration was declared inline, mark it as such. */
7270 DECL_DECLARED_INLINE_P (decl
) = 1;
7272 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7274 DECL_EXTERNAL (decl
) = 1;
7275 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7278 ? G_("static member function %qD cannot have cv-qualifier")
7279 : G_("non-member function %qD cannot have cv-qualifier"),
7281 quals
= TYPE_UNQUALIFIED
;
7284 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7285 && !grok_op_properties (decl
, /*complain=*/true))
7289 /* Make the init_value nonzero so pushdecl knows this is not
7290 tentative. error_mark_node is replaced later with the BLOCK. */
7291 DECL_INITIAL (decl
) = error_mark_node
;
7293 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7294 TREE_NOTHROW (decl
) = 1;
7296 /* Caller will do the rest of this. */
7300 if (ctype
!= NULL_TREE
)
7301 grokclassfn (ctype
, decl
, flags
);
7303 decl
= check_explicit_specialization (orig_declarator
, decl
,
7306 4 * (friendp
!= 0));
7307 if (decl
== error_mark_node
)
7310 if (DECL_STATIC_FUNCTION_P (decl
))
7311 check_static_quals (decl
, quals
);
7315 cplus_decl_attributes (&decl
, *attrlist
, 0);
7316 *attrlist
= NULL_TREE
;
7319 /* Check main's type after attributes have been applied. */
7320 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7322 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7325 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7327 error ("%<::main%> must return %<int%>");
7328 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7329 TREE_TYPE (decl
) = newtype
;
7332 check_main_parameter_types (decl
);
7335 if (ctype
!= NULL_TREE
7336 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7339 tree old_decl
= check_classfn (ctype
, decl
,
7340 (processing_template_decl
7341 > template_class_depth (ctype
))
7342 ? current_template_parms
7345 if (old_decl
== error_mark_node
)
7353 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7354 /* Because grokfndecl is always supposed to return a
7355 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7356 here. We depend on our callers to figure out that its
7357 really a template that's being returned. */
7358 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7360 if (DECL_STATIC_FUNCTION_P (old_decl
)
7361 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7363 /* Remove the `this' parm added by grokclassfn. */
7364 revert_static_member_fn (decl
);
7365 check_static_quals (decl
, quals
);
7367 if (DECL_ARTIFICIAL (old_decl
))
7369 error ("definition of implicitly-declared %qD", old_decl
);
7373 /* Since we've smashed OLD_DECL to its
7374 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7375 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7376 decl
= DECL_TEMPLATE_RESULT (decl
);
7378 /* Attempt to merge the declarations. This can fail, in
7379 the case of some invalid specialization declarations. */
7380 pushed_scope
= push_scope (ctype
);
7381 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7383 pop_scope (pushed_scope
);
7386 error ("no %q#D member function declared in class %qT",
7394 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7397 if (ctype
== NULL_TREE
|| check
)
7401 DECL_VIRTUAL_P (decl
) = 1;
7406 /* decl is a FUNCTION_DECL.
7407 specifiers are the parsed virt-specifiers.
7409 Set flags to reflect the virt-specifiers.
7414 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7416 if (decl
== NULL_TREE
)
7418 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7419 DECL_OVERRIDE_P (decl
) = 1;
7420 if (specifiers
& VIRT_SPEC_FINAL
)
7421 DECL_FINAL_P (decl
) = 1;
7425 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7426 the linkage that DECL will receive in the object file. */
7429 set_linkage_for_static_data_member (tree decl
)
7431 /* A static data member always has static storage duration and
7432 external linkage. Note that static data members are forbidden in
7433 local classes -- the only situation in which a class has
7434 non-external linkage. */
7435 TREE_PUBLIC (decl
) = 1;
7436 TREE_STATIC (decl
) = 1;
7437 /* For non-template classes, static data members are always put
7438 out in exactly those files where they are defined, just as
7439 with ordinary namespace-scope variables. */
7440 if (!processing_template_decl
)
7441 DECL_INTERFACE_KNOWN (decl
) = 1;
7444 /* Create a VAR_DECL named NAME with the indicated TYPE.
7446 If SCOPE is non-NULL, it is the class type or namespace containing
7447 the variable. If SCOPE is NULL, the variable should is created in
7448 the innermost enclosings scope. */
7451 grokvardecl (tree type
,
7453 const cp_decl_specifier_seq
*declspecs
,
7459 tree explicit_scope
;
7461 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7463 /* Compute the scope in which to place the variable, but remember
7464 whether or not that scope was explicitly specified by the user. */
7465 explicit_scope
= scope
;
7468 /* An explicit "extern" specifier indicates a namespace-scope
7470 if (declspecs
->storage_class
== sc_extern
)
7471 scope
= current_decl_namespace ();
7472 else if (!at_function_scope_p ())
7473 scope
= current_scope ();
7477 && (/* If the variable is a namespace-scope variable declared in a
7478 template, we need DECL_LANG_SPECIFIC. */
7479 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7480 /* Similarly for namespace-scope variables with language linkage
7482 || (TREE_CODE (scope
) == NAMESPACE_DECL
7483 && current_lang_name
!= lang_name_cplusplus
)
7484 /* Similarly for static data members. */
7486 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7488 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7490 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7491 set_decl_namespace (decl
, explicit_scope
, 0);
7493 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7495 if (declspecs
->storage_class
== sc_extern
)
7497 DECL_THIS_EXTERN (decl
) = 1;
7498 DECL_EXTERNAL (decl
) = !initialized
;
7501 if (DECL_CLASS_SCOPE_P (decl
))
7503 set_linkage_for_static_data_member (decl
);
7504 /* This function is only called with out-of-class definitions. */
7505 DECL_EXTERNAL (decl
) = 0;
7506 check_class_member_definition_namespace (decl
);
7508 /* At top level, either `static' or no s.c. makes a definition
7509 (perhaps tentative), and absence of `static' makes it public. */
7510 else if (toplevel_bindings_p ())
7512 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7513 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7514 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7516 /* Not at top level, only `static' makes a static definition. */
7519 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7520 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7523 if (declspecs
->specs
[(int)ds_thread
])
7524 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7526 /* If the type of the decl has no linkage, make sure that we'll
7527 notice that in mark_used. */
7528 if (cxx_dialect
> cxx98
7529 && decl_linkage (decl
) != lk_none
7530 && DECL_LANG_SPECIFIC (decl
) == NULL
7531 && !DECL_EXTERN_C_P (decl
)
7532 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7533 retrofit_lang_decl (decl
);
7535 if (TREE_PUBLIC (decl
))
7537 /* [basic.link]: A name with no linkage (notably, the name of a class
7538 or enumeration declared in a local scope) shall not be used to
7539 declare an entity with linkage.
7541 DR 757 relaxes this restriction for C++0x. */
7542 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7543 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7546 if (TYPE_ANONYMOUS_P (t
))
7548 if (DECL_EXTERN_C_P (decl
))
7549 /* Allow this; it's pretty common in C. */
7553 /* DRs 132, 319 and 389 seem to indicate types with
7554 no linkage can only be used to declare extern "C"
7555 entities. Since it's not always an error in the
7556 ISO C++ 90 Standard, we only issue a warning. */
7557 warning (0, "anonymous type with no linkage used to declare "
7558 "variable %q#D with linkage", decl
);
7559 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7560 warning (0, "%q+#D does not refer to the unqualified "
7561 "type, so it is not used for linkage",
7566 warning (0, "type %qT with no linkage used to declare variable "
7567 "%q#D with linkage", t
, decl
);
7571 DECL_INTERFACE_KNOWN (decl
) = 1;
7576 /* Create and return a canonical pointer to member function type, for
7577 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7580 build_ptrmemfunc_type (tree type
)
7584 tree unqualified_variant
= NULL_TREE
;
7586 if (type
== error_mark_node
)
7589 /* If a canonical type already exists for this type, use it. We use
7590 this method instead of type_hash_canon, because it only does a
7591 simple equality check on the list of field members. */
7593 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7596 /* Make sure that we always have the unqualified pointer-to-member
7598 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7600 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7602 t
= make_class_type (RECORD_TYPE
);
7603 xref_basetypes (t
, NULL_TREE
);
7605 /* Let the front end know this is a pointer to member function... */
7606 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7607 /* ... and not really a class type. */
7608 SET_CLASS_TYPE_P (t
, 0);
7610 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7613 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7615 DECL_CHAIN (field
) = fields
;
7618 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7620 /* Zap out the name so that the back end will give us the debugging
7621 information for this anonymous RECORD_TYPE. */
7622 TYPE_NAME (t
) = NULL_TREE
;
7624 /* If this is not the unqualified form of this pointer-to-member
7625 type, set the TYPE_MAIN_VARIANT for this type to be the
7626 unqualified type. Since they are actually RECORD_TYPEs that are
7627 not variants of each other, we must do this manually.
7628 As we just built a new type there is no need to do yet another copy. */
7629 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7631 int type_quals
= cp_type_quals (type
);
7632 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7633 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7634 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7635 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7636 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7637 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7638 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7641 /* Cache this pointer-to-member type so that we can find it again
7643 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7645 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7646 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7647 else if (TYPE_CANONICAL (type
) != type
)
7648 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7653 /* Create and return a pointer to data member type. */
7656 build_ptrmem_type (tree class_type
, tree member_type
)
7658 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7660 cp_cv_quals quals
= type_memfn_quals (member_type
);
7661 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7662 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7666 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7667 return build_offset_type (class_type
, member_type
);
7671 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7672 Check to see that the definition is valid. Issue appropriate error
7673 messages. Return 1 if the definition is particularly bad, or 0
7677 check_static_variable_definition (tree decl
, tree type
)
7679 /* Can't check yet if we don't know the type. */
7680 if (dependent_type_p (type
))
7682 /* If DECL is declared constexpr, we'll do the appropriate checks
7683 in check_initializer. */
7684 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
7686 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7688 if (literal_type_p (type
))
7689 error ("%<constexpr%> needed for in-class initialization of static "
7690 "data member %q#D of non-integral type", decl
);
7692 error ("in-class initialization of static data member %q#D of "
7693 "non-literal type", decl
);
7697 /* Motion 10 at San Diego: If a static const integral data member is
7698 initialized with an integral constant expression, the initializer
7699 may appear either in the declaration (within the class), or in
7700 the definition, but not both. If it appears in the class, the
7701 member is a member constant. The file-scope definition is always
7703 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7705 error ("invalid in-class initialization of static data member "
7706 "of non-integral type %qT",
7710 else if (!CP_TYPE_CONST_P (type
))
7711 error ("ISO C++ forbids in-class initialization of non-const "
7712 "static member %qD",
7714 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7715 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7716 "%qD of non-integral type %qT", decl
, type
);
7721 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7722 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7723 expressions out into temporary variables so that walk_tree doesn't
7724 step into them (c++/15764). */
7727 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
7729 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
7730 tree expr
= *expr_p
;
7731 if (TREE_CODE (expr
) == SAVE_EXPR
)
7733 tree op
= TREE_OPERAND (expr
, 0);
7734 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
7735 if (TREE_SIDE_EFFECTS (op
))
7736 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
7739 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
7744 /* Entry point for the above. */
7747 stabilize_vla_size (tree size
)
7749 struct pointer_set_t
*pset
= pointer_set_create ();
7750 /* Break out any function calls into temporary variables. */
7751 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
7754 /* Given the SIZE (i.e., number of elements) in an array, compute an
7755 appropriate index type for the array. If non-NULL, NAME is the
7756 name of the thing being declared. */
7759 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
7764 tree abi_1_itype
= NULL_TREE
;
7766 if (error_operand_p (size
))
7767 return error_mark_node
;
7769 type
= TREE_TYPE (size
);
7770 /* type_dependent_expression_p? */
7771 if (!dependent_type_p (type
))
7773 mark_rvalue_use (size
);
7775 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
7776 && TREE_SIDE_EFFECTS (size
))
7777 /* In C++98, we mark a non-constant array bound with a magic
7778 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7781 size
= fold_non_dependent_expr (size
);
7783 if (CLASS_TYPE_P (type
)
7784 && CLASSTYPE_LITERAL_P (type
))
7786 size
= build_expr_type_conversion (WANT_INT
, size
, true);
7789 if (!(complain
& tf_error
))
7790 return error_mark_node
;
7792 error ("size of array %qD has non-integral type %qT",
7795 error ("size of array has non-integral type %qT", type
);
7796 size
= integer_one_node
;
7798 if (size
== error_mark_node
)
7799 return error_mark_node
;
7800 type
= TREE_TYPE (size
);
7801 /* We didn't support this case in GCC 3.2, so don't bother
7802 trying to model it now in ABI v1. */
7803 abi_1_itype
= error_mark_node
;
7806 size
= maybe_constant_value (size
);
7807 if (!TREE_CONSTANT (size
))
7811 if (error_operand_p (size
))
7812 return error_mark_node
;
7814 /* The array bound must be an integer type. */
7815 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7817 if (!(complain
& tf_error
))
7818 return error_mark_node
;
7820 error ("size of array %qD has non-integral type %qT", name
, type
);
7822 error ("size of array has non-integral type %qT", type
);
7823 size
= integer_one_node
;
7824 type
= TREE_TYPE (size
);
7828 /* A type is dependent if it is...an array type constructed from any
7829 dependent type or whose size is specified by a constant expression
7830 that is value-dependent. */
7831 /* We can only call value_dependent_expression_p on integral constant
7832 expressions; treat non-constant expressions as dependent, too. */
7833 if (processing_template_decl
7834 && (dependent_type_p (type
)
7835 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
7837 /* We cannot do any checking for a SIZE that isn't known to be
7838 constant. Just build the index type and mark that it requires
7839 structural equality checks. */
7840 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7841 size
, integer_one_node
));
7842 TYPE_DEPENDENT_P (itype
) = 1;
7843 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7844 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7848 if (!abi_version_at_least (2) && processing_template_decl
7849 && abi_1_itype
== NULL_TREE
)
7850 /* For abi-1, we handled all instances in templates the same way,
7851 even when they were non-dependent. This affects the manglings
7852 produced. So, we do the normal checking for non-dependent
7853 sizes, but at the end we'll return the same type that abi-1
7854 would have, but with TYPE_CANONICAL set to the "right"
7855 value that the current ABI would provide. */
7856 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7857 osize
, integer_one_node
));
7859 /* Normally, the array-bound will be a constant. */
7860 if (TREE_CODE (size
) == INTEGER_CST
)
7862 /* Check to see if the array bound overflowed. Make that an
7863 error, no matter how generous we're being. */
7864 constant_expression_error (size
);
7866 /* An array must have a positive number of elements. */
7867 if (INT_CST_LT (size
, integer_zero_node
))
7869 if (!(complain
& tf_error
))
7870 return error_mark_node
;
7872 error ("size of array %qD is negative", name
);
7874 error ("size of array is negative");
7875 size
= integer_one_node
;
7877 /* As an extension we allow zero-sized arrays. */
7878 else if (integer_zerop (size
))
7880 if (!(complain
& tf_error
))
7881 /* We must fail if performing argument deduction (as
7882 indicated by the state of complain), so that
7883 another substitution can be found. */
7884 return error_mark_node
;
7885 else if (in_system_header
)
7886 /* Allow them in system headers because glibc uses them. */;
7888 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
7890 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
7893 else if (TREE_CONSTANT (size
)
7894 /* We don't allow VLAs at non-function scopes, or during
7895 tentative template substitution. */
7896 || !at_function_scope_p () || !(complain
& tf_error
))
7898 if (!(complain
& tf_error
))
7899 return error_mark_node
;
7900 /* `(int) &fn' is not a valid array bound. */
7902 error ("size of array %qD is not an integral constant-expression",
7905 error ("size of array is not an integral constant-expression");
7906 size
= integer_one_node
;
7908 else if (pedantic
&& warn_vla
!= 0)
7911 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
7913 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
7915 else if (warn_vla
> 0)
7919 "variable length array %qD is used", name
);
7922 "variable length array is used");
7925 if (processing_template_decl
&& !TREE_CONSTANT (size
))
7926 /* A variable sized array. */
7927 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
7930 HOST_WIDE_INT saved_processing_template_decl
;
7932 /* Compute the index of the largest element in the array. It is
7933 one less than the number of elements in the array. We save
7934 and restore PROCESSING_TEMPLATE_DECL so that computations in
7935 cp_build_binary_op will be appropriately folded. */
7936 saved_processing_template_decl
= processing_template_decl
;
7937 processing_template_decl
= 0;
7938 itype
= cp_build_binary_op (input_location
,
7940 cp_convert (ssizetype
, size
),
7941 cp_convert (ssizetype
, integer_one_node
),
7942 tf_warning_or_error
);
7943 itype
= fold (itype
);
7944 processing_template_decl
= saved_processing_template_decl
;
7946 if (!TREE_CONSTANT (itype
))
7947 /* A variable sized array. */
7948 itype
= variable_size (itype
);
7949 /* Make sure that there was no overflow when creating to a signed
7950 index type. (For example, on a 32-bit machine, an array with
7951 size 2^32 - 1 is too big.) */
7952 else if (TREE_CODE (itype
) == INTEGER_CST
7953 && TREE_OVERFLOW (itype
))
7955 if (!(complain
& tf_error
))
7956 return error_mark_node
;
7957 error ("overflow in array dimension");
7958 TREE_OVERFLOW (itype
) = 0;
7962 /* Create and return the appropriate index type. */
7963 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
7965 tree t
= build_index_type (itype
);
7966 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
7967 itype
= abi_1_itype
;
7970 itype
= build_index_type (itype
);
7972 /* If the index type were dependent, we would have returned early, so
7973 remember that it isn't. */
7974 TYPE_DEPENDENT_P (itype
) = 0;
7975 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7979 /* Returns the scope (if any) in which the entity declared by
7980 DECLARATOR will be located. If the entity was declared with an
7981 unqualified name, NULL_TREE is returned. */
7984 get_scope_of_declarator (const cp_declarator
*declarator
)
7986 while (declarator
&& declarator
->kind
!= cdk_id
)
7987 declarator
= declarator
->declarator
;
7989 /* If the declarator-id is a SCOPE_REF, the scope in which the
7990 declaration occurs is the first operand. */
7992 && declarator
->u
.id
.qualifying_scope
)
7993 return declarator
->u
.id
.qualifying_scope
;
7995 /* Otherwise, the declarator is not a qualified name; the entity will
7996 be declared in the current scope. */
8000 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8001 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8005 create_array_type_for_decl (tree name
, tree type
, tree size
)
8007 tree itype
= NULL_TREE
;
8009 /* If things have already gone awry, bail now. */
8010 if (type
== error_mark_node
|| size
== error_mark_node
)
8011 return error_mark_node
;
8013 /* 8.3.4/1: If the type of the identifier of D contains the auto
8014 type-specifier, the program is ill-formed. */
8015 if (pedantic
&& type_uses_auto (type
))
8016 pedwarn (input_location
, OPT_pedantic
,
8017 "declaration of %qD as array of %<auto%>", name
);
8019 /* If there are some types which cannot be array elements,
8020 issue an error-message and return. */
8021 switch (TREE_CODE (type
))
8025 error ("declaration of %qD as array of void", name
);
8027 error ("creating array of void");
8028 return error_mark_node
;
8032 error ("declaration of %qD as array of functions", name
);
8034 error ("creating array of functions");
8035 return error_mark_node
;
8037 case REFERENCE_TYPE
:
8039 error ("declaration of %qD as array of references", name
);
8041 error ("creating array of references");
8042 return error_mark_node
;
8046 error ("declaration of %qD as array of function members", name
);
8048 error ("creating array of function members");
8049 return error_mark_node
;
8057 The constant expressions that specify the bounds of the arrays
8058 can be omitted only for the first member of the sequence. */
8059 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8062 error ("declaration of %qD as multidimensional array must "
8063 "have bounds for all dimensions except the first",
8066 error ("multidimensional array must have bounds for all "
8067 "dimensions except the first");
8069 return error_mark_node
;
8072 /* Figure out the index type for the array. */
8074 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8077 T is called the array element type; this type shall not be [...] an
8078 abstract class type. */
8079 abstract_virtuals_error (name
, type
);
8081 return build_cplus_array_type (type
, itype
);
8084 /* Check that it's OK to declare a function with the indicated TYPE.
8085 SFK indicates the kind of special function (if any) that this
8086 function is. OPTYPE is the type given in a conversion operator
8087 declaration, or the class type for a constructor/destructor.
8088 Returns the actual return type of the function; that
8089 may be different than TYPE if an error occurs, or for certain
8090 special functions. */
8093 check_special_function_return_type (special_function_kind sfk
,
8099 case sfk_constructor
:
8101 error ("return type specification for constructor invalid");
8103 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8104 type
= build_pointer_type (optype
);
8106 type
= void_type_node
;
8109 case sfk_destructor
:
8111 error ("return type specification for destructor invalid");
8112 /* We can't use the proper return type here because we run into
8113 problems with ambiguous bases and covariant returns.
8114 Java classes are left unchanged because (void *) isn't a valid
8115 Java type, and we don't want to change the Java ABI. */
8116 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8117 type
= build_pointer_type (void_type_node
);
8119 type
= void_type_node
;
8122 case sfk_conversion
:
8124 error ("return type specified for %<operator %T%>", optype
);
8135 /* A variable or data member (whose unqualified name is IDENTIFIER)
8136 has been declared with the indicated TYPE. If the TYPE is not
8137 acceptable, issue an error message and return a type to use for
8138 error-recovery purposes. */
8141 check_var_type (tree identifier
, tree type
)
8143 if (VOID_TYPE_P (type
))
8146 error ("unnamed variable or field declared void");
8147 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8149 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8150 error ("variable or field %qE declared void", identifier
);
8153 error ("variable or field declared void");
8154 type
= error_mark_node
;
8160 /* Given declspecs and a declarator (abstract or otherwise), determine
8161 the name and type of the object declared and construct a DECL node
8164 DECLSPECS points to the representation of declaration-specifier
8165 sequence that precedes declarator.
8167 DECL_CONTEXT says which syntactic context this declaration is in:
8168 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8169 FUNCDEF for a function definition. Like NORMAL but a few different
8170 error messages in each case. Return value may be zero meaning
8171 this definition is too screwy to try to parse.
8172 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8173 handle member functions (which have FIELD context).
8174 Return value may be zero meaning this definition is too screwy to
8176 PARM for a parameter declaration (either within a function prototype
8177 or before a function body). Make a PARM_DECL, or return void_type_node.
8178 TPARM for a template parameter declaration.
8179 CATCHPARM for a parameter declaration before a catch clause.
8180 TYPENAME if for a typename (in a cast or sizeof).
8181 Don't make a DECL node; just return the ..._TYPE node.
8182 FIELD for a struct or union field; make a FIELD_DECL.
8183 BITFIELD for a field with specified width.
8185 INITIALIZED is as for start_decl.
8187 ATTRLIST is a pointer to the list of attributes, which may be NULL
8188 if there are none; *ATTRLIST may be modified if attributes from inside
8189 the declarator should be applied to the declaration.
8191 When this function is called, scoping variables (such as
8192 CURRENT_CLASS_TYPE) should reflect the scope in which the
8193 declaration occurs, not the scope in which the new declaration will
8194 be placed. For example, on:
8198 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8201 Returns a DECL (if a declarator is present), a TYPE (if there is no
8202 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8206 grokdeclarator (const cp_declarator
*declarator
,
8207 const cp_decl_specifier_seq
*declspecs
,
8208 enum decl_context decl_context
,
8212 tree type
= NULL_TREE
;
8214 int explicit_int128
= 0;
8215 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8216 int explicit_int
= 0;
8217 int explicit_char
= 0;
8218 int defaulted_int
= 0;
8219 tree dependent_name
= NULL_TREE
;
8221 tree typedef_decl
= NULL_TREE
;
8222 const char *name
= NULL
;
8223 tree typedef_type
= NULL_TREE
;
8224 /* True if this declarator is a function definition. */
8225 bool funcdef_flag
= false;
8226 cp_declarator_kind innermost_code
= cdk_error
;
8229 /* See the code below that used this. */
8230 tree decl_attr
= NULL_TREE
;
8233 /* Keep track of what sort of function is being processed
8234 so that we can warn about default return values, or explicit
8235 return values which do not match prescribed defaults. */
8236 special_function_kind sfk
= sfk_none
;
8238 tree dname
= NULL_TREE
;
8239 tree ctor_return_type
= NULL_TREE
;
8240 enum overload_flags flags
= NO_SPECIAL
;
8241 /* cv-qualifiers that apply to the declarator, for a declaration of
8242 a member function. */
8243 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8244 /* virt-specifiers that apply to the declarator, for a declaration of
8245 a member function. */
8246 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8247 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8249 tree raises
= NULL_TREE
;
8250 int template_count
= 0;
8251 tree returned_attrs
= NULL_TREE
;
8252 tree parms
= NULL_TREE
;
8253 const cp_declarator
*id_declarator
;
8254 /* The unqualified name of the declarator; either an
8255 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8256 tree unqualified_id
;
8257 /* The class type, if any, in which this entity is located,
8258 or NULL_TREE if none. Note that this value may be different from
8259 the current class type; for example if an attempt is made to declare
8260 "A::f" inside "B", this value will be "A". */
8261 tree ctype
= current_class_type
;
8262 /* The NAMESPACE_DECL for the namespace in which this entity is
8263 located. If an unqualified name is used to declare the entity,
8264 this value will be NULL_TREE, even if the entity is located at
8266 tree in_namespace
= NULL_TREE
;
8267 cp_storage_class storage_class
;
8268 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8269 bool type_was_error_mark_node
= false;
8270 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8271 bool template_type_arg
= false;
8272 bool template_parm_flag
= false;
8273 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
8276 signed_p
= declspecs
->specs
[(int)ds_signed
];
8277 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
8278 short_p
= declspecs
->specs
[(int)ds_short
];
8279 long_p
= declspecs
->specs
[(int)ds_long
];
8280 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
8281 explicit_int128
= declspecs
->explicit_int128_p
;
8282 thread_p
= declspecs
->specs
[(int)ds_thread
];
8284 if (decl_context
== FUNCDEF
)
8285 funcdef_flag
= true, decl_context
= NORMAL
;
8286 else if (decl_context
== MEMFUNCDEF
)
8287 funcdef_flag
= true, decl_context
= FIELD
;
8288 else if (decl_context
== BITFIELD
)
8289 bitfield
= 1, decl_context
= FIELD
;
8290 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8291 template_type_arg
= true, decl_context
= TYPENAME
;
8292 else if (decl_context
== TPARM
)
8293 template_parm_flag
= true, decl_context
= PARM
;
8295 if (initialized
> 1)
8296 funcdef_flag
= true;
8298 /* Look inside a declarator for the name being declared
8299 and get it as a string, for an error message. */
8300 for (id_declarator
= declarator
;
8302 id_declarator
= id_declarator
->declarator
)
8304 if (id_declarator
->kind
!= cdk_id
)
8305 innermost_code
= id_declarator
->kind
;
8307 switch (id_declarator
->kind
)
8310 if (id_declarator
->declarator
8311 && id_declarator
->declarator
->kind
== cdk_id
)
8313 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8314 if (sfk
== sfk_destructor
)
8321 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8322 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8325 if (qualifying_scope
)
8327 if (at_function_scope_p ())
8331 A declarator-id shall not be qualified except
8334 None of the cases are permitted in block
8336 if (qualifying_scope
== global_namespace
)
8337 error ("invalid use of qualified-name %<::%D%>",
8339 else if (TYPE_P (qualifying_scope
))
8340 error ("invalid use of qualified-name %<%T::%D%>",
8341 qualifying_scope
, decl
);
8343 error ("invalid use of qualified-name %<%D::%D%>",
8344 qualifying_scope
, decl
);
8345 return error_mark_node
;
8347 else if (TYPE_P (qualifying_scope
))
8349 ctype
= qualifying_scope
;
8350 if (!MAYBE_CLASS_TYPE_P (ctype
))
8352 error ("%q#T is not a class or a namespace", ctype
);
8355 else if (innermost_code
!= cdk_function
8356 && current_class_type
8357 && !UNIQUELY_DERIVED_FROM_P (ctype
,
8358 current_class_type
))
8360 error ("type %qT is not derived from type %qT",
8361 ctype
, current_class_type
);
8362 return error_mark_node
;
8365 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8366 in_namespace
= qualifying_scope
;
8368 switch (TREE_CODE (decl
))
8374 if (innermost_code
!= cdk_function
)
8376 error ("declaration of %qD as non-function", decl
);
8377 return error_mark_node
;
8379 else if (!qualifying_scope
8380 && !(current_class_type
&& at_class_scope_p ()))
8382 error ("declaration of %qD as non-member", decl
);
8383 return error_mark_node
;
8386 type
= TREE_OPERAND (decl
, 0);
8388 type
= constructor_name (type
);
8389 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8394 case TEMPLATE_ID_EXPR
:
8396 tree fns
= TREE_OPERAND (decl
, 0);
8399 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8401 gcc_assert (is_overloaded_fn (dname
));
8402 dname
= DECL_NAME (get_first_fn (dname
));
8407 case IDENTIFIER_NODE
:
8408 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8411 if (C_IS_RESERVED_WORD (dname
))
8413 error ("declarator-id missing; using reserved word %qD",
8415 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8417 else if (!IDENTIFIER_TYPENAME_P (dname
))
8418 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8421 gcc_assert (flags
== NO_SPECIAL
);
8422 flags
= TYPENAME_FLAG
;
8423 ctor_return_type
= TREE_TYPE (dname
);
8424 sfk
= sfk_conversion
;
8425 if (is_typename_at_global_scope (dname
))
8426 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8428 name
= "<invalid operator>";
8445 return error_mark_node
;
8450 if (id_declarator
->kind
== cdk_id
)
8456 The declarator in a function-definition shall have the form
8457 D1 ( parameter-declaration-clause) ... */
8458 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8460 error ("function definition does not declare parameters");
8461 return error_mark_node
;
8464 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8465 && innermost_code
!= cdk_function
8466 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8468 error ("declaration of %qD as non-function", dname
);
8469 return error_mark_node
;
8472 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8474 if (declspecs
->specs
[(int)ds_typedef
])
8476 error ("declaration of %qD as %<typedef%>", dname
);
8477 return error_mark_node
;
8479 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8481 error ("declaration of %qD as parameter", dname
);
8482 return error_mark_node
;
8486 /* Anything declared one level down from the top level
8487 must be one of the parameters of a function
8488 (because the body is at least two levels down). */
8490 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8491 by not allowing C++ class definitions to specify their parameters
8492 with xdecls (must be spec.d in the parmlist).
8494 Since we now wait to push a class scope until we are sure that
8495 we are in a legitimate method context, we must set oldcname
8496 explicitly (since current_class_name is not yet alive).
8498 We also want to avoid calling this a PARM if it is in a namespace. */
8500 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8502 struct cp_binding_level
*b
= current_binding_level
;
8503 current_binding_level
= b
->level_chain
;
8504 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8505 decl_context
= PARM
;
8506 current_binding_level
= b
;
8510 name
= decl_context
== PARM
? "parameter" : "type name";
8512 if (constexpr_p
&& declspecs
->specs
[(int)ds_typedef
])
8514 error ("%<constexpr%> cannot appear in a typedef declaration");
8515 return error_mark_node
;
8518 /* If there were multiple types specified in the decl-specifier-seq,
8519 issue an error message. */
8520 if (declspecs
->multiple_types_p
)
8522 error ("two or more data types in declaration of %qs", name
);
8523 return error_mark_node
;
8526 if (declspecs
->conflicting_specifiers_p
)
8528 error ("conflicting specifiers in declaration of %qs", name
);
8529 return error_mark_node
;
8532 /* Extract the basic type from the decl-specifier-seq. */
8533 type
= declspecs
->type
;
8534 if (type
== error_mark_node
)
8537 type_was_error_mark_node
= true;
8539 /* If the entire declaration is itself tagged as deprecated then
8540 suppress reports of deprecated items. */
8541 if (type
&& TREE_DEPRECATED (type
)
8542 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8543 warn_deprecated_use (type
, NULL_TREE
);
8544 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8546 typedef_decl
= type
;
8547 type
= TREE_TYPE (typedef_decl
);
8548 if (TREE_DEPRECATED (type
)
8549 && DECL_ARTIFICIAL (typedef_decl
)
8550 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8551 warn_deprecated_use (type
, NULL_TREE
);
8553 /* No type at all: default to `int', and set DEFAULTED_INT
8554 because it was not a user-defined typedef. */
8555 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8557 /* These imply 'int'. */
8558 type
= integer_type_node
;
8562 explicit_int
= declspecs
->explicit_int_p
;
8563 explicit_char
= declspecs
->explicit_char_p
;
8566 /* See the code below that used this. */
8568 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8570 typedef_type
= type
;
8573 if (sfk
!= sfk_conversion
)
8574 ctor_return_type
= ctype
;
8576 if (sfk
!= sfk_none
)
8577 type
= check_special_function_return_type (sfk
, type
,
8579 else if (type
== NULL_TREE
)
8585 /* We handle `main' specially here, because 'main () { }' is so
8586 common. With no options, it is allowed. With -Wreturn-type,
8587 it is a warning. It is only an error with -pedantic-errors. */
8588 is_main
= (funcdef_flag
8589 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8590 && MAIN_NAME_P (dname
)
8591 && ctype
== NULL_TREE
8592 && in_namespace
== NULL_TREE
8593 && current_namespace
== global_namespace
);
8595 if (type_was_error_mark_node
)
8596 /* We've already issued an error, don't complain more. */;
8597 else if (in_system_header
|| flag_ms_extensions
)
8598 /* Allow it, sigh. */;
8600 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8602 pedwarn (input_location
, OPT_pedantic
,
8603 "ISO C++ forbids declaration of %qs with no type", name
);
8605 warning (OPT_Wreturn_type
,
8606 "ISO C++ forbids declaration of %qs with no type", name
);
8608 type
= integer_type_node
;
8613 /* Now process the modifiers that were specified
8614 and check for invalid combinations. */
8616 /* Long double is a special combination. */
8617 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8620 type
= cp_build_qualified_type (long_double_type_node
,
8621 cp_type_quals (type
));
8624 /* Check all other uses of type modifiers. */
8626 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8630 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8631 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8632 else if (signed_p
&& unsigned_p
)
8633 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8634 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8635 error ("%<long long%> invalid for %qs", name
);
8636 else if (explicit_int128
&& TREE_CODE (type
) != INTEGER_TYPE
)
8637 error ("%<__int128%> invalid for %qs", name
);
8638 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8639 error ("%<long%> invalid for %qs", name
);
8640 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8641 error ("%<short%> invalid for %qs", name
);
8642 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8643 error ("%<long%> or %<short%> invalid for %qs", name
);
8644 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8645 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8646 else if ((long_p
|| short_p
) && explicit_char
)
8647 error ("%<long%> or %<short%> specified with char for %qs", name
);
8648 else if (long_p
&& short_p
)
8649 error ("%<long%> and %<short%> specified together for %qs", name
);
8650 else if (type
== char16_type_node
|| type
== char32_type_node
)
8652 if (signed_p
|| unsigned_p
)
8653 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8654 else if (short_p
|| long_p
)
8655 error ("%<short%> or %<long%> invalid for %qs", name
);
8660 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8662 pedwarn (input_location
, OPT_pedantic
,
8663 "long, short, signed or unsigned used invalidly for %qs",
8665 if (flag_pedantic_errors
)
8668 if (explicit_int128
)
8670 if (int128_integer_type_node
== NULL_TREE
)
8672 error ("%<__int128%> is not supported by this target");
8677 pedwarn (input_location
, OPT_pedantic
,
8678 "ISO C++ does not support %<__int128%> for %qs",
8680 if (flag_pedantic_errors
)
8686 /* Discard the type modifiers if they are invalid. */
8694 explicit_int128
= false;
8698 /* Decide whether an integer type is signed or not.
8699 Optionally treat bitfields as signed by default. */
8703 It is implementation-defined whether a plain (neither
8704 explicitly signed or unsigned) char, short, int, or long
8705 bit-field is signed or unsigned.
8707 Naturally, we extend this to long long as well. Note that
8708 this does not include wchar_t. */
8709 || (bitfield
&& !flag_signed_bitfields
8711 /* A typedef for plain `int' without `signed' can be
8712 controlled just like plain `int', but a typedef for
8713 `signed int' cannot be so controlled. */
8715 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8716 && TREE_CODE (type
) == INTEGER_TYPE
8717 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8719 if (explicit_int128
)
8720 type
= int128_unsigned_type_node
;
8722 type
= long_long_unsigned_type_node
;
8724 type
= long_unsigned_type_node
;
8726 type
= short_unsigned_type_node
;
8727 else if (type
== char_type_node
)
8728 type
= unsigned_char_type_node
;
8729 else if (typedef_decl
)
8730 type
= unsigned_type_for (type
);
8732 type
= unsigned_type_node
;
8734 else if (signed_p
&& type
== char_type_node
)
8735 type
= signed_char_type_node
;
8736 else if (explicit_int128
)
8737 type
= int128_integer_type_node
;
8739 type
= long_long_integer_type_node
;
8741 type
= long_integer_type_node
;
8743 type
= short_integer_type_node
;
8745 if (declspecs
->specs
[(int)ds_complex
])
8747 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8748 error ("complex invalid for %qs", name
);
8749 /* If we just have "complex", it is equivalent to
8750 "complex double", but if any modifiers at all are specified it is
8751 the complex form of TYPE. E.g, "complex short" is
8752 "complex short int". */
8753 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8754 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8755 type
= complex_double_type_node
;
8756 else if (type
== integer_type_node
)
8757 type
= complex_integer_type_node
;
8758 else if (type
== float_type_node
)
8759 type
= complex_float_type_node
;
8760 else if (type
== double_type_node
)
8761 type
= complex_double_type_node
;
8762 else if (type
== long_double_type_node
)
8763 type
= complex_long_double_type_node
;
8765 type
= build_complex_type (type
);
8768 type_quals
= TYPE_UNQUALIFIED
;
8769 if (declspecs
->specs
[(int)ds_const
])
8770 type_quals
|= TYPE_QUAL_CONST
;
8771 if (declspecs
->specs
[(int)ds_volatile
])
8772 type_quals
|= TYPE_QUAL_VOLATILE
;
8773 if (declspecs
->specs
[(int)ds_restrict
])
8774 type_quals
|= TYPE_QUAL_RESTRICT
;
8775 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8776 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8779 type_quals
|= cp_type_quals (type
);
8780 type
= cp_build_qualified_type_real
8781 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8782 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8783 /* We might have ignored or rejected some of the qualifiers. */
8784 type_quals
= cp_type_quals (type
);
8787 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8788 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8789 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8791 storage_class
= declspecs
->storage_class
;
8792 if (storage_class
== sc_static
)
8793 staticp
= 1 + (decl_context
== FIELD
);
8795 if (virtualp
&& staticp
== 2)
8797 error ("member %qD cannot be declared both virtual and static", dname
);
8798 storage_class
= sc_none
;
8801 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8803 if (dependent_name
&& !friendp
)
8805 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8806 return error_mark_node
;
8809 /* Issue errors about use of storage classes for parameters. */
8810 if (decl_context
== PARM
)
8812 if (declspecs
->specs
[(int)ds_typedef
])
8814 error ("typedef declaration invalid in parameter declaration");
8815 return error_mark_node
;
8817 else if (template_parm_flag
&& storage_class
!= sc_none
)
8819 error ("storage class specified for template parameter %qs", name
);
8820 return error_mark_node
;
8822 else if (storage_class
== sc_static
8823 || storage_class
== sc_extern
8825 error ("storage class specifiers invalid in parameter declarations");
8827 /* Function parameters cannot be constexpr. If we saw one, moan
8828 and pretend it wasn't there. */
8831 error ("a parameter cannot be declared %<constexpr%>");
8836 /* Give error if `virtual' is used outside of class declaration. */
8838 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8840 error ("%<virtual%> outside class declaration");
8844 /* Static anonymous unions are dealt with here. */
8845 if (staticp
&& decl_context
== TYPENAME
8847 && ANON_AGGR_TYPE_P (declspecs
->type
))
8848 decl_context
= FIELD
;
8850 /* Warn about storage classes that are invalid for certain
8851 kinds of declarations (parameters, typenames, etc.). */
8854 && storage_class
!= sc_extern
8855 && storage_class
!= sc_static
)
8856 || declspecs
->specs
[(int)ds_typedef
]))
8858 error ("multiple storage classes in declaration of %qs", name
);
8861 if (decl_context
!= NORMAL
8862 && ((storage_class
!= sc_none
8863 && storage_class
!= sc_mutable
)
8866 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
8867 && (storage_class
== sc_register
8868 || storage_class
== sc_auto
))
8870 else if (declspecs
->specs
[(int)ds_typedef
])
8872 else if (decl_context
== FIELD
8873 /* C++ allows static class elements. */
8874 && storage_class
== sc_static
)
8875 /* C++ also allows inlines and signed and unsigned elements,
8876 but in those cases we don't come in here. */
8880 if (decl_context
== FIELD
)
8881 error ("storage class specified for %qs", name
);
8884 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8885 error ("storage class specified for parameter %qs", name
);
8887 error ("storage class specified for typename");
8889 if (storage_class
== sc_register
8890 || storage_class
== sc_auto
8891 || storage_class
== sc_extern
8893 storage_class
= sc_none
;
8896 else if (storage_class
== sc_extern
&& funcdef_flag
8897 && ! toplevel_bindings_p ())
8898 error ("nested function %qs declared %<extern%>", name
);
8899 else if (toplevel_bindings_p ())
8901 if (storage_class
== sc_auto
)
8902 error ("top-level declaration of %qs specifies %<auto%>", name
);
8905 && storage_class
!= sc_extern
8906 && storage_class
!= sc_static
)
8908 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8913 if (storage_class
&& friendp
)
8915 error ("storage class specifiers invalid in friend function declarations");
8916 storage_class
= sc_none
;
8921 unqualified_id
= NULL_TREE
;
8924 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
8925 switch (TREE_CODE (unqualified_id
))
8928 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
8929 if (TYPE_P (unqualified_id
))
8930 unqualified_id
= constructor_name (unqualified_id
);
8933 case IDENTIFIER_NODE
:
8934 case TEMPLATE_ID_EXPR
:
8942 /* Determine the type of the entity declared by recurring on the
8944 for (; declarator
; declarator
= declarator
->declarator
)
8946 const cp_declarator
*inner_declarator
;
8949 if (type
== error_mark_node
)
8950 return error_mark_node
;
8952 attrs
= declarator
->attributes
;
8958 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
8959 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
8960 if (declarator
->kind
== cdk_function
)
8961 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
8962 if (declarator
->kind
== cdk_array
)
8963 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
8964 returned_attrs
= decl_attributes (&type
,
8965 chainon (returned_attrs
, attrs
),
8969 if (declarator
->kind
== cdk_id
)
8972 inner_declarator
= declarator
->declarator
;
8974 switch (declarator
->kind
)
8977 type
= create_array_type_for_decl (dname
, type
,
8978 declarator
->u
.array
.bounds
);
8986 /* Declaring a function type.
8987 Make sure we have a valid type for the function to return. */
8989 if (type_quals
!= TYPE_UNQUALIFIED
)
8991 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
8992 warning (OPT_Wignored_qualifiers
,
8993 "type qualifiers ignored on function return type");
8994 /* We now know that the TYPE_QUALS don't apply to the
8995 decl, but to its return type. */
8996 type_quals
= TYPE_UNQUALIFIED
;
8998 errmsg
= targetm
.invalid_return_type (type
);
9002 type
= integer_type_node
;
9005 /* Error about some types functions can't return. */
9007 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9009 error ("%qs declared as function returning a function", name
);
9010 return error_mark_node
;
9012 if (TREE_CODE (type
) == ARRAY_TYPE
)
9014 error ("%qs declared as function returning an array", name
);
9015 return error_mark_node
;
9018 /* Pick up type qualifiers which should be applied to `this'. */
9019 memfn_quals
= declarator
->u
.function
.qualifiers
;
9020 /* Pick up virt-specifiers. */
9021 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9022 /* Pick up the exception specifications. */
9023 raises
= declarator
->u
.function
.exception_specification
;
9025 /* Say it's a definition only for the CALL_EXPR
9026 closest to the identifier. */
9027 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9029 /* Handle a late-specified return type. */
9032 if (type_uses_auto (type
))
9034 if (!declarator
->u
.function
.late_return_type
)
9036 error ("%qs function uses %<auto%> type specifier without"
9037 " late return type", name
);
9038 return error_mark_node
;
9040 else if (!is_auto (type
))
9042 error ("%qs function with late return type has"
9043 " %qT as its type rather than plain %<auto%>",
9045 return error_mark_node
;
9048 else if (declarator
->u
.function
.late_return_type
)
9050 error ("%qs function with late return type not declared"
9051 " with %<auto%> type specifier", name
);
9052 return error_mark_node
;
9055 type
= splice_late_return_type
9056 (type
, declarator
->u
.function
.late_return_type
);
9057 if (type
== error_mark_node
)
9058 return error_mark_node
;
9060 if (ctype
== NULL_TREE
9061 && decl_context
== FIELD
9063 && (friendp
== 0 || dname
== current_class_name
))
9064 ctype
= current_class_type
;
9066 if (ctype
&& (sfk
== sfk_constructor
9067 || sfk
== sfk_destructor
))
9069 /* We are within a class's scope. If our declarator name
9070 is the same as the class name, and we are defining
9071 a function, then it is a constructor/destructor, and
9072 therefore returns a void type. */
9074 /* ISO C++ 12.4/2. A destructor may not be declared
9075 const or volatile. A destructor may not be
9078 ISO C++ 12.1. A constructor may not be declared
9079 const or volatile. A constructor may not be
9080 virtual. A constructor may not be static. */
9082 error ((flags
== DTOR_FLAG
)
9083 ? "destructor cannot be static member function"
9084 : "constructor cannot be static member function");
9087 error ((flags
== DTOR_FLAG
)
9088 ? "destructors may not be cv-qualified"
9089 : "constructors may not be cv-qualified");
9090 memfn_quals
= TYPE_UNQUALIFIED
;
9093 if (decl_context
== FIELD
9094 && !member_function_or_else (ctype
,
9097 return error_mark_node
;
9099 if (flags
!= DTOR_FLAG
)
9101 /* It's a constructor. */
9106 permerror (input_location
, "constructors cannot be declared virtual");
9109 if (decl_context
== FIELD
9110 && sfk
!= sfk_constructor
)
9111 return error_mark_node
;
9113 if (decl_context
== FIELD
)
9119 error ("can%'t initialize friend function %qs", name
);
9122 /* Cannot be both friend and virtual. */
9123 error ("virtual functions cannot be friends");
9126 if (decl_context
== NORMAL
)
9127 error ("friend declaration not in class definition");
9128 if (current_function_decl
&& funcdef_flag
)
9129 error ("can%'t define friend function %qs in a local "
9133 else if (ctype
&& sfk
== sfk_conversion
)
9137 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9142 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9145 if (inner_declarator
9146 && inner_declarator
->kind
== cdk_id
9147 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9148 && arg_types
!= void_list_node
)
9150 error ("destructors may not have parameters");
9151 arg_types
= void_list_node
;
9155 type
= build_function_type (type
, arg_types
);
9162 /* Filter out pointers-to-references and references-to-references.
9163 We can get these if a TYPE_DECL is used. */
9165 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9167 if (declarator
->kind
!= cdk_reference
)
9169 error ("cannot declare pointer to %q#T", type
);
9170 type
= TREE_TYPE (type
);
9173 /* In C++0x, we allow reference to reference declarations
9174 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9175 and template type arguments [14.3.1/4 temp.arg.type]. The
9176 check for direct reference to reference declarations, which
9177 are still forbidden, occurs below. Reasoning behind the change
9178 can be found in DR106, DR540, and the rvalue reference
9180 else if (cxx_dialect
== cxx98
)
9182 error ("cannot declare reference to %q#T", type
);
9183 type
= TREE_TYPE (type
);
9186 else if (VOID_TYPE_P (type
))
9188 if (declarator
->kind
== cdk_reference
)
9189 error ("cannot declare reference to %q#T", type
);
9190 else if (declarator
->kind
== cdk_ptrmem
)
9191 error ("cannot declare pointer to %q#T member", type
);
9194 /* We now know that the TYPE_QUALS don't apply to the decl,
9195 but to the target of the pointer. */
9196 type_quals
= TYPE_UNQUALIFIED
;
9198 if (declarator
->kind
== cdk_ptrmem
9199 && (TREE_CODE (type
) == FUNCTION_TYPE
9200 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9202 memfn_quals
|= type_memfn_quals (type
);
9203 type
= build_memfn_type (type
,
9204 declarator
->u
.pointer
.class_type
,
9206 if (type
== error_mark_node
)
9207 return error_mark_node
;
9208 memfn_quals
= TYPE_UNQUALIFIED
;
9211 if (TREE_CODE (type
) == FUNCTION_TYPE
9212 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9213 error (declarator
->kind
== cdk_reference
9214 ? G_("cannot declare reference to qualified function type %qT")
9215 : G_("cannot declare pointer to qualified function type %qT"),
9218 /* When the pointed-to type involves components of variable size,
9219 care must be taken to ensure that the size evaluation code is
9220 emitted early enough to dominate all the possible later uses
9221 and late enough for the variables on which it depends to have
9224 This is expected to happen automatically when the pointed-to
9225 type has a name/declaration of it's own, but special attention
9226 is required if the type is anonymous.
9228 We handle the NORMAL and FIELD contexts here by inserting a
9229 dummy statement that just evaluates the size at a safe point
9230 and ensures it is not deferred until e.g. within a deeper
9231 conditional context (c++/43555).
9233 We expect nothing to be needed here for PARM or TYPENAME.
9234 Evaluating the size at this point for TYPENAME would
9235 actually be incorrect, as we might be in the middle of an
9236 expression with side effects on the pointed-to type size
9237 "arguments" prior to the pointer declaration point and the
9238 size evaluation could end up prior to the side effects. */
9240 if (!TYPE_NAME (type
)
9241 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9242 && at_function_scope_p ()
9243 && variably_modified_type_p (type
, NULL_TREE
))
9245 /* First break out any side-effects. */
9246 stabilize_vla_size (TYPE_SIZE (type
));
9247 /* And then force evaluation of the SAVE_EXPR. */
9248 finish_expr_stmt (TYPE_SIZE (type
));
9251 if (declarator
->kind
== cdk_reference
)
9253 /* In C++0x, the type we are creating a reference to might be
9254 a typedef which is itself a reference type. In that case,
9255 we follow the reference collapsing rules in
9256 [7.1.3/8 dcl.typedef] to create the final reference type:
9258 "If a typedef TD names a type that is a reference to a type
9259 T, an attempt to create the type 'lvalue reference to cv TD'
9260 creates the type 'lvalue reference to T,' while an attempt
9261 to create the type "rvalue reference to cv TD' creates the
9264 if (VOID_TYPE_P (type
))
9265 /* We already gave an error. */;
9266 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9268 if (declarator
->u
.reference
.rvalue_ref
)
9269 /* Leave type alone. */;
9271 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9274 type
= cp_build_reference_type
9275 (type
, declarator
->u
.reference
.rvalue_ref
);
9277 /* In C++0x, we need this check for direct reference to
9278 reference declarations, which are forbidden by
9279 [8.3.2/5 dcl.ref]. Reference to reference declarations
9280 are only allowed indirectly through typedefs and template
9281 type arguments. Example:
9283 void foo(int & &); // invalid ref-to-ref decl
9285 typedef int & int_ref;
9286 void foo(int_ref &); // valid ref-to-ref decl
9288 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9289 error ("cannot declare reference to %q#T, which is not "
9290 "a typedef or a template type argument", type
);
9292 else if (TREE_CODE (type
) == METHOD_TYPE
)
9293 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9294 else if (declarator
->kind
== cdk_ptrmem
)
9296 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9298 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9299 /* We will already have complained. */
9300 type
= error_mark_node
;
9302 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9306 type
= build_pointer_type (type
);
9308 /* Process a list of type modifier keywords (such as
9309 const or volatile) that were given inside the `*' or `&'. */
9311 if (declarator
->u
.pointer
.qualifiers
)
9314 = cp_build_qualified_type (type
,
9315 declarator
->u
.pointer
.qualifiers
);
9316 type_quals
= cp_type_quals (type
);
9329 /* We need to stabilize side-effects in VLA sizes for regular array
9330 declarations too, not just pointers to arrays. */
9331 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9332 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9333 && at_function_scope_p ()
9334 && variably_modified_type_p (type
, NULL_TREE
))
9335 stabilize_vla_size (TYPE_SIZE (type
));
9337 /* A `constexpr' specifier used in an object declaration declares
9338 the object as `const'. */
9339 if (constexpr_p
&& innermost_code
!= cdk_function
)
9341 if (type_quals
& TYPE_QUAL_CONST
)
9342 error ("both %<const%> and %<constexpr%> cannot be used here");
9343 if (type_quals
& TYPE_QUAL_VOLATILE
)
9344 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9345 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9347 type_quals
|= TYPE_QUAL_CONST
;
9348 type
= cp_build_qualified_type (type
, type_quals
);
9352 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9353 && TREE_CODE (type
) != FUNCTION_TYPE
9354 && TREE_CODE (type
) != METHOD_TYPE
)
9356 error ("template-id %qD used as a declarator",
9358 unqualified_id
= dname
;
9361 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9362 qualified with a class-name, turn it into a METHOD_TYPE, unless
9363 we know that the function is static. We take advantage of this
9364 opportunity to do other processing that pertains to entities
9365 explicitly declared to be class members. Note that if DECLARATOR
9366 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9367 would not have exited the loop above. */
9369 && declarator
->u
.id
.qualifying_scope
9370 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9374 ctype
= declarator
->u
.id
.qualifying_scope
;
9375 ctype
= TYPE_MAIN_VARIANT (ctype
);
9377 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
9379 /* You're supposed to have one `template <...>' for every
9380 template class, but you don't need one for a full
9381 specialization. For example:
9383 template <class T> struct S{};
9384 template <> struct S<int> { void f(); };
9385 void S<int>::f () {}
9387 is correct; there shouldn't be a `template <>' for the
9388 definition of `S<int>::f'. */
9389 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
9390 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
9391 /* T is an explicit (not partial) specialization. All
9392 containing classes must therefore also be explicitly
9395 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
9396 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
9397 template_count
+= 1;
9399 t
= TYPE_MAIN_DECL (t
);
9400 t
= DECL_CONTEXT (t
);
9403 if (ctype
== current_class_type
)
9407 permerror (input_location
, "member functions are implicitly friends of their class");
9411 permerror (declarator
->id_loc
,
9412 "extra qualification %<%T::%> on member %qs",
9415 else if (/* If the qualifying type is already complete, then we
9416 can skip the following checks. */
9417 !COMPLETE_TYPE_P (ctype
)
9418 && (/* If the function is being defined, then
9419 qualifying type must certainly be complete. */
9421 /* A friend declaration of "T::f" is OK, even if
9422 "T" is a template parameter. But, if this
9423 function is not a friend, the qualifying type
9425 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9426 /* For a declaration, the type need not be
9427 complete, if either it is dependent (since there
9428 is no meaningful definition of complete in that
9429 case) or the qualifying class is currently being
9431 || !(dependent_type_p (ctype
)
9432 || currently_open_class (ctype
)))
9433 /* Check that the qualifying type is complete. */
9434 && !complete_type_or_else (ctype
, NULL_TREE
))
9435 return error_mark_node
;
9436 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9438 if (current_class_type
9439 && (!friendp
|| funcdef_flag
))
9442 ? "cannot define member function %<%T::%s%> within %<%T%>"
9443 : "cannot declare member function %<%T::%s%> within %<%T%>",
9444 ctype
, name
, current_class_type
);
9445 return error_mark_node
;
9448 else if (declspecs
->specs
[(int)ds_typedef
]
9449 && current_class_type
)
9451 error ("cannot declare member %<%T::%s%> within %qT",
9452 ctype
, name
, current_class_type
);
9453 return error_mark_node
;
9457 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9458 ctype
= current_class_type
;
9460 /* Now TYPE has the actual type. */
9465 *attrlist
= chainon (returned_attrs
, *attrlist
);
9467 attrlist
= &returned_attrs
;
9470 /* Handle parameter packs. */
9471 if (parameter_pack_p
)
9473 if (decl_context
== PARM
)
9474 /* Turn the type into a pack expansion.*/
9475 type
= make_pack_expansion (type
);
9477 error ("non-parameter %qs cannot be a parameter pack", name
);
9480 /* Did array size calculations overflow? */
9482 if (TREE_CODE (type
) == ARRAY_TYPE
9483 && COMPLETE_TYPE_P (type
)
9484 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9485 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
9487 error ("size of array %qs is too large", name
);
9488 /* If we proceed with the array type as it is, we'll eventually
9489 crash in tree_low_cst(). */
9490 type
= error_mark_node
;
9493 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9494 && !processing_template_decl
9495 && variably_modified_type_p (type
, NULL_TREE
))
9497 if (decl_context
== FIELD
)
9498 error ("data member may not have variably modified type %qT", type
);
9500 error ("parameter may not have variably modified type %qT", type
);
9501 type
= error_mark_node
;
9504 if (explicitp
== 1 || (explicitp
&& friendp
))
9506 /* [dcl.fct.spec] The explicit specifier shall only be used in
9507 declarations of constructors within a class definition. */
9508 error ("only declarations of constructors can be %<explicit%>");
9512 if (storage_class
== sc_mutable
)
9514 if (decl_context
!= FIELD
|| friendp
)
9516 error ("non-member %qs cannot be declared %<mutable%>", name
);
9517 storage_class
= sc_none
;
9519 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9521 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9522 storage_class
= sc_none
;
9524 else if (TREE_CODE (type
) == FUNCTION_TYPE
9525 || TREE_CODE (type
) == METHOD_TYPE
)
9527 error ("function %qs cannot be declared %<mutable%>", name
);
9528 storage_class
= sc_none
;
9532 error ("static %qs cannot be declared %<mutable%>", name
);
9533 storage_class
= sc_none
;
9535 else if (type_quals
& TYPE_QUAL_CONST
)
9537 error ("const %qs cannot be declared %<mutable%>", name
);
9538 storage_class
= sc_none
;
9540 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9542 permerror (input_location
, "reference %qs cannot be declared "
9543 "%<mutable%>", name
);
9544 storage_class
= sc_none
;
9548 /* If this is declaring a typedef name, return a TYPE_DECL. */
9549 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9553 /* Note that the grammar rejects storage classes
9554 in typenames, fields or parameters. */
9555 if (current_lang_name
== lang_name_java
)
9556 TYPE_FOR_JAVA (type
) = 1;
9558 /* This declaration:
9560 typedef void f(int) const;
9562 declares a function type which is not a member of any
9563 particular class, but which is cv-qualified; for
9564 example "f S::*" declares a pointer to a const-qualified
9565 member function of S. We record the cv-qualification in the
9567 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9569 type
= apply_memfn_quals (type
, memfn_quals
);
9571 /* We have now dealt with these qualifiers. */
9572 memfn_quals
= TYPE_UNQUALIFIED
;
9575 if (type_uses_auto (type
))
9577 error ("typedef declared %<auto%>");
9578 type
= error_mark_node
;
9581 if (decl_context
== FIELD
)
9582 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9584 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9585 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9586 error_at (DECL_SOURCE_LOCATION (decl
),
9587 "typedef name may not be a nested-name-specifier");
9588 TREE_TYPE (decl
) = error_mark_node
;
9591 if (decl_context
!= FIELD
)
9593 if (!current_function_decl
)
9594 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9595 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9596 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9597 (current_function_decl
)))
9598 /* The TYPE_DECL is "abstract" because there will be
9599 clones of this constructor/destructor, and there will
9600 be copies of this TYPE_DECL generated in those
9602 DECL_ABSTRACT (decl
) = 1;
9604 else if (constructor_name_p (unqualified_id
, current_class_type
))
9605 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9606 "as enclosing class",
9609 /* If the user declares "typedef struct {...} foo" then the
9610 struct will have an anonymous name. Fill that name in now.
9611 Nothing can refer to it, so nothing needs know about the name
9613 if (type
!= error_mark_node
9616 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9617 && TYPE_ANONYMOUS_P (type
)
9618 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9622 /* Replace the anonymous name with the real name everywhere. */
9623 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9625 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9626 /* We do not rename the debug info representing the
9627 anonymous tagged type because the standard says in
9628 [dcl.typedef] that the naming applies only for
9629 linkage purposes. */
9630 /*debug_hooks->set_name (t, decl);*/
9631 TYPE_NAME (t
) = decl
;
9634 if (TYPE_LANG_SPECIFIC (type
))
9635 TYPE_WAS_ANONYMOUS (type
) = 1;
9637 /* If this is a typedef within a template class, the nested
9638 type is a (non-primary) template. The name for the
9639 template needs updating as well. */
9640 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9641 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9642 = TYPE_IDENTIFIER (type
);
9644 /* Adjust linkage now that we aren't anonymous anymore. */
9645 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9646 determine_visibility (TYPE_MAIN_DECL (type
));
9648 /* FIXME remangle member functions; member functions of a
9649 type with external linkage have external linkage. */
9653 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9654 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9656 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
9657 memfn_quals
!= TYPE_UNQUALIFIED
,
9658 inlinep
, friendp
, raises
!= NULL_TREE
);
9663 /* Detect the case of an array type of unspecified size
9664 which came, as such, direct from a typedef name.
9665 We must copy the type, so that the array's domain can be
9666 individually set by the object's initializer. */
9668 if (type
&& typedef_type
9669 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9670 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9671 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9673 /* Detect where we're using a typedef of function type to declare a
9674 function. PARMS will not be set, so we must create it now. */
9676 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9678 tree decls
= NULL_TREE
;
9681 for (args
= TYPE_ARG_TYPES (type
);
9682 args
&& args
!= void_list_node
;
9683 args
= TREE_CHAIN (args
))
9685 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9687 DECL_CHAIN (decl
) = decls
;
9691 parms
= nreverse (decls
);
9693 if (decl_context
!= TYPENAME
)
9695 /* A cv-qualifier-seq shall only be part of the function type
9696 for a non-static member function. [8.3.5/4 dcl.fct] */
9697 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9698 && (current_class_type
== NULL_TREE
|| staticp
) )
9701 ? G_("qualified function types cannot be used to "
9702 "declare static member functions")
9703 : G_("qualified function types cannot be used to "
9704 "declare free functions"));
9705 type
= TYPE_MAIN_VARIANT (type
);
9708 /* The qualifiers on the function type become the qualifiers on
9709 the non-static member function. */
9710 memfn_quals
|= type_memfn_quals (type
);
9711 type_quals
= TYPE_UNQUALIFIED
;
9715 /* If this is a type name (such as, in a cast or sizeof),
9716 compute the type and return it now. */
9718 if (decl_context
== TYPENAME
)
9720 /* Note that the grammar rejects storage classes
9721 in typenames, fields or parameters. */
9722 if (type_quals
!= TYPE_UNQUALIFIED
)
9723 type_quals
= TYPE_UNQUALIFIED
;
9725 /* Special case: "friend class foo" looks like a TYPENAME context. */
9728 if (type_quals
!= TYPE_UNQUALIFIED
)
9730 error ("type qualifiers specified for friend class declaration");
9731 type_quals
= TYPE_UNQUALIFIED
;
9735 error ("%<inline%> specified for friend class declaration");
9741 /* Don't allow friend declaration without a class-key. */
9742 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9743 permerror (input_location
, "template parameters cannot be friends");
9744 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9745 permerror (input_location
, "friend declaration requires class-key, "
9746 "i.e. %<friend class %T::%D%>",
9747 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9749 permerror (input_location
, "friend declaration requires class-key, "
9750 "i.e. %<friend %#T%>",
9754 /* Only try to do this stuff if we didn't already give up. */
9755 if (type
!= integer_type_node
)
9757 /* A friendly class? */
9758 if (current_class_type
)
9759 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9762 error ("trying to make class %qT a friend of global scope",
9765 type
= void_type_node
;
9768 else if (memfn_quals
)
9770 if (ctype
== NULL_TREE
9771 && TREE_CODE (type
) == METHOD_TYPE
)
9772 ctype
= TYPE_METHOD_BASETYPE (type
);
9775 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9776 /* Core issue #547: need to allow this in template type args. */
9777 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9778 type
= apply_memfn_quals (type
, memfn_quals
);
9780 error ("invalid qualifiers on non-member function type");
9785 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9786 && decl_context
!= CATCHPARM
9787 && TREE_CODE (type
) != UNION_TYPE
9790 error ("abstract declarator %qT used as declaration", type
);
9791 return error_mark_node
;
9794 /* Only functions may be declared using an operator-function-id. */
9796 && IDENTIFIER_OPNAME_P (unqualified_id
)
9797 && TREE_CODE (type
) != FUNCTION_TYPE
9798 && TREE_CODE (type
) != METHOD_TYPE
)
9800 error ("declaration of %qD as non-function", unqualified_id
);
9801 return error_mark_node
;
9804 /* We don't check parameter types here because we can emit a better
9805 error message later. */
9806 if (decl_context
!= PARM
)
9808 type
= check_var_type (unqualified_id
, type
);
9809 if (type
== error_mark_node
)
9810 return error_mark_node
;
9813 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9814 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9816 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9818 if (ctype
|| in_namespace
)
9819 error ("cannot use %<::%> in parameter declaration");
9821 if (type_uses_auto (type
))
9823 error ("parameter declared %<auto%>");
9824 type
= error_mark_node
;
9827 /* A parameter declared as an array of T is really a pointer to T.
9828 One declared as a function is really a pointer to a function.
9829 One declared as a member is really a pointer to member. */
9831 if (TREE_CODE (type
) == ARRAY_TYPE
)
9833 /* Transfer const-ness of array into that of type pointed to. */
9834 type
= build_pointer_type (TREE_TYPE (type
));
9835 type_quals
= TYPE_UNQUALIFIED
;
9837 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9838 type
= build_pointer_type (type
);
9841 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
9842 && !NEW_DELETE_OPNAME_P (unqualified_id
))
9844 cp_cv_quals real_quals
= memfn_quals
;
9845 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
9846 real_quals
|= TYPE_QUAL_CONST
;
9847 type
= build_memfn_type (type
, ctype
, real_quals
);
9853 if (decl_context
== PARM
)
9855 decl
= cp_build_parm_decl (unqualified_id
, type
);
9857 bad_specifiers (decl
, BSP_PARM
, virtualp
,
9858 memfn_quals
!= TYPE_UNQUALIFIED
,
9859 inlinep
, friendp
, raises
!= NULL_TREE
);
9861 else if (decl_context
== FIELD
)
9863 /* The C99 flexible array extension. */
9864 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
9865 && TYPE_DOMAIN (type
) == NULL_TREE
)
9867 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
9868 tf_warning_or_error
);
9869 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
9872 if (type
== error_mark_node
)
9874 /* Happens when declaring arrays of sizes which
9875 are error_mark_node, for example. */
9878 else if (in_namespace
&& !friendp
)
9880 /* Something like struct S { int N::j; }; */
9881 error ("invalid use of %<::%>");
9882 return error_mark_node
;
9884 else if (TREE_CODE (type
) == FUNCTION_TYPE
9885 || TREE_CODE (type
) == METHOD_TYPE
)
9888 tree function_context
;
9892 /* This should never happen in pure C++ (the check
9893 could be an assert). It could happen in
9894 Objective-C++ if someone writes invalid code that
9895 uses a function declaration for an instance
9896 variable or property (instance variables and
9897 properties are parsed as FIELD_DECLs, but they are
9898 part of an Objective-C class, not a C++ class).
9899 That code is invalid and is caught by this
9903 error ("declaration of function %qD in invalid context",
9905 return error_mark_node
;
9908 /* ``A union may [ ... ] not [ have ] virtual functions.''
9910 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
9912 error ("function %qD declared virtual inside a union",
9914 return error_mark_node
;
9917 if (NEW_DELETE_OPNAME_P (unqualified_id
))
9921 error ("%qD cannot be declared virtual, since it "
9929 /* Check that the name used for a destructor makes sense. */
9930 if (sfk
== sfk_destructor
)
9932 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
9936 gcc_assert (friendp
);
9937 error ("expected qualified name in friend declaration "
9938 "for destructor %qD", uqname
);
9939 return error_mark_node
;
9942 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
9944 error ("declaration of %qD as member of %qT",
9946 return error_mark_node
;
9950 error ("a destructor cannot be %<constexpr%>");
9951 return error_mark_node
;
9954 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
9956 error ("expected qualified name in friend declaration "
9957 "for constructor %qD",
9958 id_declarator
->u
.id
.unqualified_name
);
9959 return error_mark_node
;
9962 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9963 function_context
= (ctype
!= NULL_TREE
) ?
9964 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
9965 publicp
= (! friendp
|| ! staticp
)
9966 && function_context
== NULL_TREE
;
9967 decl
= grokfndecl (ctype
, type
,
9968 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
9969 ? unqualified_id
: dname
,
9972 virtualp
, flags
, memfn_quals
, raises
,
9973 friendp
? -1 : 0, friendp
, publicp
,
9974 inlinep
| (2 * constexpr_p
),
9976 funcdef_flag
, template_count
, in_namespace
,
9977 attrlist
, declarator
->id_loc
);
9978 decl
= set_virt_specifiers (decl
, virt_specifiers
);
9979 if (decl
== NULL_TREE
)
9980 return error_mark_node
;
9982 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9983 /* The decl and setting of decl_attr is also turned off. */
9984 decl
= build_decl_attribute_variant (decl
, decl_attr
);
9987 /* [class.conv.ctor]
9989 A constructor declared without the function-specifier
9990 explicit that can be called with a single parameter
9991 specifies a conversion from the type of its first
9992 parameter to the type of its class. Such a constructor
9993 is called a converting constructor. */
9995 DECL_NONCONVERTING_P (decl
) = 1;
9997 else if (!staticp
&& !dependent_type_p (type
)
9998 && !COMPLETE_TYPE_P (complete_type (type
))
9999 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10001 if (unqualified_id
)
10002 error ("field %qD has incomplete type", unqualified_id
);
10004 error ("name %qT has incomplete type", type
);
10006 /* If we're instantiating a template, tell them which
10007 instantiation made the field's type be incomplete. */
10008 if (current_class_type
10009 && TYPE_NAME (current_class_type
)
10010 && IDENTIFIER_TEMPLATE (current_class_name
)
10012 && declspecs
->type
== type
)
10013 error (" in instantiation of template %qT",
10014 current_class_type
);
10016 return error_mark_node
;
10022 error ("%qE is neither function nor member function; "
10023 "cannot be declared friend", unqualified_id
);
10031 /* Friends are treated specially. */
10032 if (ctype
== current_class_type
)
10033 ; /* We already issued a permerror. */
10034 else if (decl
&& DECL_NAME (decl
))
10036 if (template_class_depth (current_class_type
) == 0)
10038 decl
= check_explicit_specialization
10039 (unqualified_id
, decl
, template_count
,
10040 2 * funcdef_flag
+ 4);
10041 if (decl
== error_mark_node
)
10042 return error_mark_node
;
10045 decl
= do_friend (ctype
, unqualified_id
, decl
,
10051 return error_mark_node
;
10054 /* Structure field. It may not be a function, except for C++. */
10056 if (decl
== NULL_TREE
)
10062 /* An attempt is being made to initialize a non-static
10063 member. But, from [class.mem]:
10065 4 A member-declarator can contain a
10066 constant-initializer only if it declares a static
10067 member (_class.static_) of integral or enumeration
10068 type, see _class.static.data_.
10070 This used to be relatively common practice, but
10071 the rest of the compiler does not correctly
10072 handle the initialization unless the member is
10073 static so we make it static below. */
10074 if (cxx_dialect
>= cxx0x
)
10076 sorry ("non-static data member initializers");
10080 permerror (input_location
, "ISO C++ forbids initialization of member %qD",
10082 permerror (input_location
, "making %qD static", unqualified_id
);
10090 /* C++ allows static class members. All other work
10091 for this is done by grokfield. */
10092 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
10093 set_linkage_for_static_data_member (decl
);
10094 /* Even if there is an in-class initialization, DECL
10095 is considered undefined until an out-of-class
10096 definition is provided. */
10097 DECL_EXTERNAL (decl
) = 1;
10100 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10102 if (constexpr_p
&& !initialized
)
10104 error ("constexpr static data member %qD must have an "
10105 "initializer", decl
);
10106 constexpr_p
= false;
10113 error ("non-static data member %qE declared %<constexpr%>",
10115 constexpr_p
= false;
10117 decl
= build_decl (input_location
,
10118 FIELD_DECL
, unqualified_id
, type
);
10119 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10120 if (bitfield
&& !unqualified_id
)
10121 TREE_NO_WARNING (decl
) = 1;
10123 if (storage_class
== sc_mutable
)
10125 DECL_MUTABLE_P (decl
) = 1;
10126 storage_class
= sc_none
;
10130 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10131 memfn_quals
!= TYPE_UNQUALIFIED
,
10132 inlinep
, friendp
, raises
!= NULL_TREE
);
10135 else if (TREE_CODE (type
) == FUNCTION_TYPE
10136 || TREE_CODE (type
) == METHOD_TYPE
)
10138 tree original_name
;
10141 if (!unqualified_id
)
10142 return error_mark_node
;
10144 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10145 original_name
= dname
;
10147 original_name
= unqualified_id
;
10149 if (storage_class
== sc_auto
)
10150 error ("storage class %<auto%> invalid for function %qs", name
);
10151 else if (storage_class
== sc_register
)
10152 error ("storage class %<register%> invalid for function %qs", name
);
10154 error ("storage class %<__thread%> invalid for function %qs", name
);
10156 if (virt_specifiers
)
10157 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10158 /* Function declaration not at top level.
10159 Storage classes other than `extern' are not allowed
10160 and `extern' makes no difference. */
10161 if (! toplevel_bindings_p ()
10162 && (storage_class
== sc_static
10163 || declspecs
->specs
[(int)ds_inline
])
10166 if (storage_class
== sc_static
)
10167 pedwarn (input_location
, OPT_pedantic
,
10168 "%<static%> specified invalid for function %qs "
10169 "declared out of global scope", name
);
10171 pedwarn (input_location
, OPT_pedantic
,
10172 "%<inline%> specifier invalid for function %qs "
10173 "declared out of global scope", name
);
10176 if (ctype
== NULL_TREE
)
10180 error ("virtual non-class function %qs", name
);
10183 else if (sfk
== sfk_constructor
10184 || sfk
== sfk_destructor
)
10186 error (funcdef_flag
10187 ? "%qs defined in a non-class scope"
10188 : "%qs declared in a non-class scope", name
);
10193 /* Record presence of `static'. */
10194 publicp
= (ctype
!= NULL_TREE
10195 || storage_class
== sc_extern
10196 || storage_class
!= sc_static
);
10198 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10199 virtualp
, flags
, memfn_quals
, raises
,
10201 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10203 template_count
, in_namespace
, attrlist
,
10204 declarator
->id_loc
);
10205 if (decl
== NULL_TREE
)
10206 return error_mark_node
;
10210 int invalid_static
= 0;
10212 /* Don't allow a static member function in a class, and forbid
10213 declaring main to be static. */
10214 if (TREE_CODE (type
) == METHOD_TYPE
)
10216 permerror (input_location
, "cannot declare member function %qD to have "
10217 "static linkage", decl
);
10218 invalid_static
= 1;
10220 else if (current_function_decl
)
10222 /* FIXME need arm citation */
10223 error ("cannot declare static function inside another function");
10224 invalid_static
= 1;
10227 if (invalid_static
)
10230 storage_class
= sc_none
;
10236 /* It's a variable. */
10238 /* An uninitialized decl with `extern' is a reference. */
10239 decl
= grokvardecl (type
, unqualified_id
,
10242 (type_quals
& TYPE_QUAL_CONST
) != 0,
10243 ctype
? ctype
: in_namespace
);
10244 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10245 memfn_quals
!= TYPE_UNQUALIFIED
,
10246 inlinep
, friendp
, raises
!= NULL_TREE
);
10250 DECL_CONTEXT (decl
) = ctype
;
10253 permerror (input_location
, "%<static%> may not be used when defining "
10254 "(as opposed to declaring) a static data member");
10256 storage_class
= sc_none
;
10258 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10260 error ("static member %qD declared %<register%>", decl
);
10261 storage_class
= sc_none
;
10263 if (storage_class
== sc_extern
&& pedantic
)
10265 pedwarn (input_location
, OPT_pedantic
,
10266 "cannot explicitly declare member %q#D to have "
10267 "extern linkage", decl
);
10268 storage_class
= sc_none
;
10271 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10273 error ("declaration of constexpr variable %qD is not a definition",
10275 constexpr_p
= false;
10279 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10281 if (toplevel_bindings_p ())
10283 /* It's common practice (and completely valid) to have a const
10284 be initialized and declared extern. */
10285 if (!(type_quals
& TYPE_QUAL_CONST
))
10286 warning (0, "%qs initialized and declared %<extern%>", name
);
10290 error ("%qs has both %<extern%> and initializer", name
);
10291 return error_mark_node
;
10295 /* Record `register' declaration for warnings on &
10296 and in case doing stupid register allocation. */
10298 if (storage_class
== sc_register
)
10299 DECL_REGISTER (decl
) = 1;
10300 else if (storage_class
== sc_extern
)
10301 DECL_THIS_EXTERN (decl
) = 1;
10302 else if (storage_class
== sc_static
)
10303 DECL_THIS_STATIC (decl
) = 1;
10305 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10306 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10307 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10309 /* Record constancy and volatility on the DECL itself . There's
10310 no need to do this when processing a template; we'll do this
10311 for the instantiated declaration based on the type of DECL. */
10312 if (!processing_template_decl
)
10313 cp_apply_type_quals_to_decl (type_quals
, decl
);
10319 /* Subroutine of start_function. Ensure that each of the parameter
10320 types (as listed in PARMS) is complete, as is required for a
10321 function definition. */
10324 require_complete_types_for_parms (tree parms
)
10326 for (; parms
; parms
= DECL_CHAIN (parms
))
10328 if (dependent_type_p (TREE_TYPE (parms
)))
10330 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10331 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10333 relayout_decl (parms
);
10334 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10337 /* grokparms or complete_type_or_else will have already issued
10339 TREE_TYPE (parms
) = error_mark_node
;
10343 /* Returns nonzero if T is a local variable. */
10346 local_variable_p (const_tree t
)
10348 if ((TREE_CODE (t
) == VAR_DECL
10349 /* A VAR_DECL with a context that is a _TYPE is a static data
10351 && !TYPE_P (CP_DECL_CONTEXT (t
))
10352 /* Any other non-local variable must be at namespace scope. */
10353 && !DECL_NAMESPACE_SCOPE_P (t
))
10354 || (TREE_CODE (t
) == PARM_DECL
))
10360 /* Like local_variable_p, but suitable for use as a tree-walking
10364 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10365 void *data ATTRIBUTE_UNUSED
)
10367 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
10369 else if (TYPE_P (*tp
))
10370 *walk_subtrees
= 0;
10376 /* Check that ARG, which is a default-argument expression for a
10377 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10378 something goes wrong. DECL may also be a _TYPE node, rather than a
10379 DECL, if there is no DECL available. */
10382 check_default_argument (tree decl
, tree arg
)
10387 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10388 /* We get a DEFAULT_ARG when looking at an in-class declaration
10389 with a default argument. Ignore the argument for now; we'll
10390 deal with it after the class is complete. */
10399 decl_type
= TREE_TYPE (decl
);
10401 if (arg
== error_mark_node
10402 || decl
== error_mark_node
10403 || TREE_TYPE (arg
) == error_mark_node
10404 || decl_type
== error_mark_node
)
10405 /* Something already went wrong. There's no need to check
10407 return error_mark_node
;
10409 /* [dcl.fct.default]
10411 A default argument expression is implicitly converted to the
10413 if (!TREE_TYPE (arg
)
10414 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
10417 error ("default argument for %q#D has type %qT",
10418 decl
, TREE_TYPE (arg
));
10420 error ("default argument for parameter of type %qT has type %qT",
10421 decl_type
, TREE_TYPE (arg
));
10423 return error_mark_node
;
10426 /* [dcl.fct.default]
10428 Local variables shall not be used in default argument
10431 The keyword `this' shall not be used in a default argument of a
10432 member function. */
10433 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10436 error ("default argument %qE uses local variable %qD", arg
, var
);
10437 return error_mark_node
;
10444 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10447 type_is_deprecated (tree type
)
10449 enum tree_code code
;
10450 if (TREE_DEPRECATED (type
))
10452 if (TYPE_NAME (type
)
10453 && TREE_DEPRECATED (TYPE_NAME (type
)))
10456 /* Do warn about using typedefs to a deprecated class. */
10457 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10458 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10460 code
= TREE_CODE (type
);
10462 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10463 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10464 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10465 return type_is_deprecated (TREE_TYPE (type
));
10467 if (TYPE_PTRMEMFUNC_P (type
))
10468 return type_is_deprecated
10469 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10474 /* Decode the list of parameter types for a function type.
10475 Given the list of things declared inside the parens,
10476 return a list of types.
10478 If this parameter does not end with an ellipsis, we append
10481 *PARMS is set to the chain of PARM_DECLs created. */
10484 grokparms (tree parmlist
, tree
*parms
)
10486 tree result
= NULL_TREE
;
10487 tree decls
= NULL_TREE
;
10491 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10493 tree type
= NULL_TREE
;
10494 tree init
= TREE_PURPOSE (parm
);
10495 tree decl
= TREE_VALUE (parm
);
10496 const char *errmsg
;
10498 if (parm
== void_list_node
)
10501 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10504 type
= TREE_TYPE (decl
);
10505 if (VOID_TYPE_P (type
))
10507 if (same_type_p (type
, void_type_node
)
10508 && DECL_SELF_REFERENCE_P (type
)
10509 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10510 /* this is a parmlist of `(void)', which is ok. */
10512 cxx_incomplete_type_error (decl
, type
);
10513 /* It's not a good idea to actually create parameters of
10514 type `void'; other parts of the compiler assume that a
10515 void type terminates the parameter list. */
10516 type
= error_mark_node
;
10517 TREE_TYPE (decl
) = error_mark_node
;
10520 if (type
!= error_mark_node
10521 && TYPE_FOR_JAVA (type
)
10522 && MAYBE_CLASS_TYPE_P (type
))
10524 error ("parameter %qD has Java class type", decl
);
10525 type
= error_mark_node
;
10526 TREE_TYPE (decl
) = error_mark_node
;
10530 if (type
!= error_mark_node
10531 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10534 type
= error_mark_node
;
10535 TREE_TYPE (decl
) = error_mark_node
;
10538 if (type
!= error_mark_node
)
10540 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10542 tree deptype
= type_is_deprecated (type
);
10544 warn_deprecated_use (deptype
, NULL_TREE
);
10547 /* Top-level qualifiers on the parameters are
10548 ignored for function types. */
10549 type
= cp_build_qualified_type (type
, 0);
10550 if (TREE_CODE (type
) == METHOD_TYPE
)
10552 error ("parameter %qD invalidly declared method type", decl
);
10553 type
= build_pointer_type (type
);
10554 TREE_TYPE (decl
) = type
;
10556 else if (abstract_virtuals_error (decl
, type
))
10557 any_error
= 1; /* Seems like a good idea. */
10558 else if (POINTER_TYPE_P (type
))
10560 /* [dcl.fct]/6, parameter types cannot contain pointers
10561 (references) to arrays of unknown bound. */
10562 tree t
= TREE_TYPE (type
);
10563 int ptr
= TYPE_PTR_P (type
);
10567 if (TYPE_PTR_P (t
))
10569 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10571 else if (!TYPE_DOMAIN (t
))
10575 if (TREE_CODE (t
) == ARRAY_TYPE
)
10577 ? G_("parameter %qD includes pointer to array of "
10578 "unknown bound %qT")
10579 : G_("parameter %qD includes reference to array of "
10580 "unknown bound %qT"),
10586 else if (init
&& !processing_template_decl
)
10587 init
= check_default_argument (decl
, init
);
10590 DECL_CHAIN (decl
) = decls
;
10592 result
= tree_cons (init
, type
, result
);
10594 decls
= nreverse (decls
);
10595 result
= nreverse (result
);
10597 result
= chainon (result
, void_list_node
);
10604 /* D is a constructor or overloaded `operator='.
10606 Let T be the class in which D is declared. Then, this function
10609 -1 if D's is an ill-formed constructor or copy assignment operator
10610 whose first parameter is of type `T'.
10611 0 if D is not a copy constructor or copy assignment
10613 1 if D is a copy constructor or copy assignment operator whose
10614 first parameter is a reference to non-const qualified T.
10615 2 if D is a copy constructor or copy assignment operator whose
10616 first parameter is a reference to const qualified T.
10618 This function can be used as a predicate. Positive values indicate
10619 a copy constructor and nonzero values indicate a copy assignment
10623 copy_fn_p (const_tree d
)
10629 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10631 if (TREE_CODE (d
) == TEMPLATE_DECL
10632 || (DECL_TEMPLATE_INFO (d
)
10633 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10634 /* Instantiations of template member functions are never copy
10635 functions. Note that member functions of templated classes are
10636 represented as template functions internally, and we must
10637 accept those as copy functions. */
10640 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10644 arg_type
= TREE_VALUE (args
);
10645 if (arg_type
== error_mark_node
)
10648 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10650 /* Pass by value copy assignment operator. */
10653 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10654 && !TYPE_REF_IS_RVALUE (arg_type
)
10655 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10657 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10663 args
= TREE_CHAIN (args
);
10665 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10666 /* There are more non-optional args. */
10672 /* D is a constructor or overloaded `operator='.
10674 Let T be the class in which D is declared. Then, this function
10675 returns true when D is a move constructor or move assignment
10676 operator, false otherwise. */
10679 move_fn_p (const_tree d
)
10683 bool result
= false;
10685 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10687 if (cxx_dialect
== cxx98
)
10688 /* There are no move constructors if we are in C++98 mode. */
10691 if (TREE_CODE (d
) == TEMPLATE_DECL
10692 || (DECL_TEMPLATE_INFO (d
)
10693 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10694 /* Instantiations of template member functions are never copy
10695 functions. Note that member functions of templated classes are
10696 represented as template functions internally, and we must
10697 accept those as copy functions. */
10700 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10704 arg_type
= TREE_VALUE (args
);
10705 if (arg_type
== error_mark_node
)
10708 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10709 && TYPE_REF_IS_RVALUE (arg_type
)
10710 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10714 args
= TREE_CHAIN (args
);
10716 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10717 /* There are more non-optional args. */
10723 /* Remember any special properties of member function DECL. */
10726 grok_special_member_properties (tree decl
)
10730 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10733 class_type
= DECL_CONTEXT (decl
);
10734 if (DECL_CONSTRUCTOR_P (decl
))
10736 int ctor
= copy_fn_p (decl
);
10738 if (!DECL_ARTIFICIAL (decl
))
10739 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10745 A non-template constructor for class X is a copy
10746 constructor if its first parameter is of type X&, const
10747 X&, volatile X& or const volatile X&, and either there
10748 are no other parameters or else all other parameters have
10749 default arguments. */
10750 TYPE_HAS_COPY_CTOR (class_type
) = 1;
10751 if (user_provided_p (decl
))
10752 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
10754 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
10756 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10758 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10759 if (user_provided_p (decl
))
10760 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10762 else if (move_fn_p (decl
) && user_provided_p (decl
))
10763 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
10764 else if (is_list_ctor (decl
))
10765 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10767 if (DECL_DECLARED_CONSTEXPR_P (decl
)
10768 && !copy_fn_p (decl
) && !move_fn_p (decl
))
10769 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
10771 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10775 A non-template assignment operator for class X is a copy
10776 assignment operator if its parameter is of type X, X&, const
10777 X&, volatile X& or const volatile X&. */
10779 int assop
= copy_fn_p (decl
);
10783 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
10784 if (user_provided_p (decl
))
10785 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
10787 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
10789 else if (move_fn_p (decl
) && user_provided_p (decl
))
10790 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
10792 /* Destructors are handled in check_methods. */
10795 /* Check a constructor DECL has the correct form. Complains
10796 if the class has a constructor of the form X(X). */
10799 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10801 int ctor_parm
= copy_fn_p (decl
);
10807 A declaration of a constructor for a class X is ill-formed if
10808 its first parameter is of type (optionally cv-qualified) X
10809 and either there are no other parameters or else all other
10810 parameters have default arguments.
10812 We *don't* complain about member template instantiations that
10813 have this form, though; they can occur as we try to decide
10814 what constructor to use during overload resolution. Since
10815 overload resolution will never prefer such a constructor to
10816 the non-template copy constructor (which is either explicitly
10817 or implicitly defined), there's no need to worry about their
10818 existence. Theoretically, they should never even be
10819 instantiated, but that's hard to forestall. */
10820 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10828 /* An operator with this code is unary, but can also be binary. */
10831 ambi_op_p (enum tree_code code
)
10833 return (code
== INDIRECT_REF
10834 || code
== ADDR_EXPR
10835 || code
== UNARY_PLUS_EXPR
10836 || code
== NEGATE_EXPR
10837 || code
== PREINCREMENT_EXPR
10838 || code
== PREDECREMENT_EXPR
);
10841 /* An operator with this name can only be unary. */
10844 unary_op_p (enum tree_code code
)
10846 return (code
== TRUTH_NOT_EXPR
10847 || code
== BIT_NOT_EXPR
10848 || code
== COMPONENT_REF
10849 || code
== TYPE_EXPR
);
10852 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10853 errors are issued for invalid declarations. */
10856 grok_op_properties (tree decl
, bool complain
)
10858 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
10860 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
10861 tree name
= DECL_NAME (decl
);
10862 enum tree_code operator_code
;
10867 /* Count the number of arguments and check for ellipsis. */
10868 for (argtype
= argtypes
, arity
= 0;
10869 argtype
&& argtype
!= void_list_node
;
10870 argtype
= TREE_CHAIN (argtype
))
10872 ellipsis_p
= !argtype
;
10874 class_type
= DECL_CONTEXT (decl
);
10875 if (class_type
&& !CLASS_TYPE_P (class_type
))
10876 class_type
= NULL_TREE
;
10878 if (DECL_CONV_FN_P (decl
))
10879 operator_code
= TYPE_EXPR
;
10883 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10884 if (ansi_opname (CODE) == name) \
10886 operator_code = (CODE); \
10889 else if (ansi_assopname (CODE) == name) \
10891 operator_code = (CODE); \
10892 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10896 #include "operators.def"
10897 #undef DEF_OPERATOR
10899 gcc_unreachable ();
10902 gcc_assert (operator_code
!= MAX_TREE_CODES
);
10903 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
10906 switch (operator_code
)
10909 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
10913 TYPE_GETS_DELETE (class_type
) |= 1;
10917 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
10920 case VEC_DELETE_EXPR
:
10921 TYPE_GETS_DELETE (class_type
) |= 2;
10928 /* [basic.std.dynamic.allocation]/1:
10930 A program is ill-formed if an allocation function is declared
10931 in a namespace scope other than global scope or declared static
10934 The same also holds true for deallocation functions. */
10935 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
10936 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
10938 if (DECL_NAMESPACE_SCOPE_P (decl
))
10940 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
10942 error ("%qD may not be declared within a namespace", decl
);
10945 else if (!TREE_PUBLIC (decl
))
10947 error ("%qD may not be declared as static", decl
);
10953 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
10955 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
10956 DECL_IS_OPERATOR_NEW (decl
) = 1;
10958 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
10959 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
10962 /* An operator function must either be a non-static member function
10963 or have at least one parameter of a class, a reference to a class,
10964 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10965 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
10967 if (operator_code
== TYPE_EXPR
10968 || operator_code
== CALL_EXPR
10969 || operator_code
== COMPONENT_REF
10970 || operator_code
== ARRAY_REF
10971 || operator_code
== NOP_EXPR
)
10973 error ("%qD must be a nonstatic member function", decl
);
10980 if (DECL_STATIC_FUNCTION_P (decl
))
10982 error ("%qD must be either a non-static member "
10983 "function or a non-member function", decl
);
10987 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
10989 tree arg
= non_reference (TREE_VALUE (p
));
10990 if (arg
== error_mark_node
)
10993 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10994 because these checks are performed even on
10995 template functions. */
10996 if (MAYBE_CLASS_TYPE_P (arg
)
10997 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11001 if (!p
|| p
== void_list_node
)
11004 error ("%qD must have an argument of class or "
11005 "enumerated type", decl
);
11011 /* There are no restrictions on the arguments to an overloaded
11013 if (operator_code
== CALL_EXPR
)
11016 /* Warn about conversion operators that will never be used. */
11017 if (IDENTIFIER_TYPENAME_P (name
)
11018 && ! DECL_TEMPLATE_INFO (decl
)
11020 /* Warn only declaring the function; there is no need to
11021 warn again about out-of-class definitions. */
11022 && class_type
== current_class_type
)
11024 tree t
= TREE_TYPE (name
);
11025 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11028 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11030 if (TREE_CODE (t
) == VOID_TYPE
)
11031 warning (OPT_Wconversion
,
11033 ? G_("conversion to a reference to void "
11034 "will never use a type conversion operator")
11035 : G_("conversion to void "
11036 "will never use a type conversion operator"));
11037 else if (class_type
)
11039 if (t
== class_type
)
11040 warning (OPT_Wconversion
,
11042 ? G_("conversion to a reference to the same type "
11043 "will never use a type conversion operator")
11044 : G_("conversion to the same type "
11045 "will never use a type conversion operator"));
11046 /* Don't force t to be complete here. */
11047 else if (MAYBE_CLASS_TYPE_P (t
)
11048 && COMPLETE_TYPE_P (t
)
11049 && DERIVED_FROM_P (t
, class_type
))
11050 warning (OPT_Wconversion
,
11052 ? G_("conversion to a reference to a base class "
11053 "will never use a type conversion operator")
11054 : G_("conversion to a base class "
11055 "will never use a type conversion operator"));
11060 if (operator_code
== COND_EXPR
)
11063 error ("ISO C++ prohibits overloading operator ?:");
11066 else if (ellipsis_p
)
11068 error ("%qD must not have variable number of arguments", decl
);
11071 else if (ambi_op_p (operator_code
))
11074 /* We pick the one-argument operator codes by default, so
11075 we don't have to change anything. */
11077 else if (arity
== 2)
11079 /* If we thought this was a unary operator, we now know
11080 it to be a binary operator. */
11081 switch (operator_code
)
11084 operator_code
= MULT_EXPR
;
11088 operator_code
= BIT_AND_EXPR
;
11091 case UNARY_PLUS_EXPR
:
11092 operator_code
= PLUS_EXPR
;
11096 operator_code
= MINUS_EXPR
;
11099 case PREINCREMENT_EXPR
:
11100 operator_code
= POSTINCREMENT_EXPR
;
11103 case PREDECREMENT_EXPR
:
11104 operator_code
= POSTDECREMENT_EXPR
;
11108 gcc_unreachable ();
11111 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11113 if ((operator_code
== POSTINCREMENT_EXPR
11114 || operator_code
== POSTDECREMENT_EXPR
)
11115 && ! processing_template_decl
11116 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11119 error ("postfix %qD must take %<int%> as its argument",
11122 error ("postfix %qD must take %<int%> as its second "
11130 error ("%qD must take either zero or one argument", decl
);
11132 error ("%qD must take either one or two arguments", decl
);
11136 /* More Effective C++ rule 6. */
11138 && (operator_code
== POSTINCREMENT_EXPR
11139 || operator_code
== POSTDECREMENT_EXPR
11140 || operator_code
== PREINCREMENT_EXPR
11141 || operator_code
== PREDECREMENT_EXPR
))
11143 tree arg
= TREE_VALUE (argtypes
);
11144 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11145 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11146 arg
= TREE_TYPE (arg
);
11147 arg
= TYPE_MAIN_VARIANT (arg
);
11148 if (operator_code
== PREINCREMENT_EXPR
11149 || operator_code
== PREDECREMENT_EXPR
)
11151 if (TREE_CODE (ret
) != REFERENCE_TYPE
11152 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11154 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11155 build_reference_type (arg
));
11159 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11160 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11164 else if (unary_op_p (operator_code
))
11169 error ("%qD must take %<void%>", decl
);
11171 error ("%qD must take exactly one argument", decl
);
11175 else /* if (binary_op_p (operator_code)) */
11180 error ("%qD must take exactly one argument", decl
);
11182 error ("%qD must take exactly two arguments", decl
);
11186 /* More Effective C++ rule 7. */
11188 && (operator_code
== TRUTH_ANDIF_EXPR
11189 || operator_code
== TRUTH_ORIF_EXPR
11190 || operator_code
== COMPOUND_EXPR
))
11191 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11195 /* Effective C++ rule 23. */
11198 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11199 && (operator_code
== PLUS_EXPR
11200 || operator_code
== MINUS_EXPR
11201 || operator_code
== TRUNC_DIV_EXPR
11202 || operator_code
== MULT_EXPR
11203 || operator_code
== TRUNC_MOD_EXPR
)
11204 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11205 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11207 /* [over.oper]/8 */
11208 for (; argtypes
&& argtypes
!= void_list_node
;
11209 argtypes
= TREE_CHAIN (argtypes
))
11210 if (TREE_PURPOSE (argtypes
))
11212 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11213 if (operator_code
== POSTINCREMENT_EXPR
11214 || operator_code
== POSTDECREMENT_EXPR
)
11216 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
11221 error ("%qD cannot have default arguments", decl
);
11229 /* Return a string giving the keyword associate with CODE. */
11231 static const char *
11232 tag_name (enum tag_types code
)
11244 case typename_type
:
11247 gcc_unreachable ();
11251 /* Name lookup in an elaborated-type-specifier (after the keyword
11252 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11253 elaborated-type-specifier is invalid, issue a diagnostic and return
11254 error_mark_node; otherwise, return the *_TYPE to which it referred.
11255 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11258 check_elaborated_type_specifier (enum tag_types tag_code
,
11260 bool allow_template_p
)
11266 struct S { struct S *p; };
11268 name lookup will find the TYPE_DECL for the implicit "S::S"
11269 typedef. Adjust for that here. */
11270 if (DECL_SELF_REFERENCE_P (decl
))
11271 decl
= TYPE_NAME (TREE_TYPE (decl
));
11273 type
= TREE_TYPE (decl
);
11275 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11276 is false for this case as well. */
11277 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11279 error ("using template type parameter %qT after %qs",
11280 type
, tag_name (tag_code
));
11281 return error_mark_node
;
11285 If the identifier resolves to a typedef-name or a template
11286 type-parameter, the elaborated-type-specifier is ill-formed.
11288 In other words, the only legitimate declaration to use in the
11289 elaborated type specifier is the implicit typedef created when
11290 the type is declared. */
11291 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11292 && !DECL_SELF_REFERENCE_P (decl
)
11293 && tag_code
!= typename_type
)
11295 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11296 error ("%q+D has a previous declaration here", decl
);
11297 return error_mark_node
;
11299 else if (TREE_CODE (type
) != RECORD_TYPE
11300 && TREE_CODE (type
) != UNION_TYPE
11301 && tag_code
!= enum_type
11302 && tag_code
!= typename_type
)
11304 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11305 error ("%q+T has a previous declaration here", type
);
11306 return error_mark_node
;
11308 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11309 && tag_code
== enum_type
)
11311 error ("%qT referred to as enum", type
);
11312 error ("%q+T has a previous declaration here", type
);
11313 return error_mark_node
;
11315 else if (!allow_template_p
11316 && TREE_CODE (type
) == RECORD_TYPE
11317 && CLASSTYPE_IS_TEMPLATE (type
))
11319 /* If a class template appears as elaborated type specifier
11320 without a template header such as:
11322 template <class T> class C {};
11323 void f(class C); // No template header here
11325 then the required template argument is missing. */
11326 error ("template argument required for %<%s %T%>",
11327 tag_name (tag_code
),
11328 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11329 return error_mark_node
;
11335 /* Lookup NAME in elaborate type specifier in scope according to
11336 SCOPE and issue diagnostics if necessary.
11337 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11338 found, and ERROR_MARK_NODE for type error. */
11341 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11342 tag_scope scope
, bool template_header_p
)
11346 if (scope
== ts_global
)
11348 /* First try ordinary name lookup, ignoring hidden class name
11349 injected via friend declaration. */
11350 decl
= lookup_name_prefer_type (name
, 2);
11351 /* If that fails, the name will be placed in the smallest
11352 non-class, non-function-prototype scope according to 3.3.1/5.
11353 We may already have a hidden name declared as friend in this
11354 scope. So lookup again but not ignoring hidden names.
11355 If we find one, that name will be made visible rather than
11356 creating a new tag. */
11358 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11361 decl
= lookup_type_scope (name
, scope
);
11363 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
11364 decl
= DECL_TEMPLATE_RESULT (decl
);
11366 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11368 /* Look for invalid nested type:
11372 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11374 error ("%qD has the same name as the class in which it is "
11377 return error_mark_node
;
11380 /* Two cases we need to consider when deciding if a class
11381 template is allowed as an elaborated type specifier:
11382 1. It is a self reference to its own class.
11383 2. It comes with a template header.
11387 template <class T> class C {
11388 class C *c1; // DECL_SELF_REFERENCE_P is true
11391 template <class U> class C; // template_header_p is true
11392 template <class T> class C<T>::D {
11393 class C *c2; // DECL_SELF_REFERENCE_P is true
11396 t
= check_elaborated_type_specifier (tag_code
,
11399 | DECL_SELF_REFERENCE_P (decl
));
11402 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11404 error ("reference to %qD is ambiguous", name
);
11405 print_candidates (decl
);
11406 return error_mark_node
;
11412 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11413 Define the tag as a forward-reference if it is not defined.
11415 If a declaration is given, process it here, and report an error if
11416 multiple declarations are not identical.
11418 SCOPE is TS_CURRENT when this is also a definition. Only look in
11419 the current frame for the name (since C++ allows new names in any
11420 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11421 declaration. Only look beginning from the current scope outward up
11422 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11424 TEMPLATE_HEADER_P is true when this declaration is preceded by
11425 a set of template parameters. */
11428 xref_tag_1 (enum tag_types tag_code
, tree name
,
11429 tag_scope scope
, bool template_header_p
)
11431 enum tree_code code
;
11433 tree context
= NULL_TREE
;
11435 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11441 code
= RECORD_TYPE
;
11447 code
= ENUMERAL_TYPE
;
11450 gcc_unreachable ();
11453 /* In case of anonymous name, xref_tag is only called to
11454 make type node and push name. Name lookup is not required. */
11455 if (ANON_AGGRNAME_P (name
))
11458 t
= lookup_and_check_tag (tag_code
, name
,
11459 scope
, template_header_p
);
11461 if (t
== error_mark_node
)
11462 return error_mark_node
;
11464 if (scope
!= ts_current
&& t
&& current_class_type
11465 && template_class_depth (current_class_type
)
11466 && template_header_p
)
11468 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11469 definition of this tag. Since, in addition, we are currently
11470 processing a (member) template declaration of a template
11471 class, we must be very careful; consider:
11478 { template <class V>
11479 friend struct S1; };
11481 Here, the S2::S1 declaration should not be confused with the
11482 outer declaration. In particular, the inner version should
11483 have a template parameter of level 2, not level 1. This
11484 would be particularly important if the member declaration
11487 template <class V = U> friend struct S1;
11489 say, when we should tsubst into `U' when instantiating
11490 S2. On the other hand, when presented with:
11500 we must find the inner binding eventually. We
11501 accomplish this by making sure that the new type we
11502 create to represent this declaration has the right
11504 context
= TYPE_CONTEXT (t
);
11510 /* If no such tag is yet defined, create a forward-reference node
11511 and record it as the "definition".
11512 When a real declaration of this type is found,
11513 the forward-reference will be altered into a real type. */
11514 if (code
== ENUMERAL_TYPE
)
11516 error ("use of enum %q#D without previous declaration", name
);
11517 return error_mark_node
;
11521 t
= make_class_type (code
);
11522 TYPE_CONTEXT (t
) = context
;
11523 t
= pushtag (name
, t
, scope
);
11528 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11530 if (!redeclare_class_template (t
, current_template_parms
))
11531 return error_mark_node
;
11533 else if (!processing_template_decl
11534 && CLASS_TYPE_P (t
)
11535 && CLASSTYPE_IS_TEMPLATE (t
))
11537 error ("redeclaration of %qT as a non-template", t
);
11538 error ("previous declaration %q+D", t
);
11539 return error_mark_node
;
11542 /* Make injected friend class visible. */
11543 if (scope
!= ts_within_enclosing_non_class
11544 && hidden_name_p (TYPE_NAME (t
)))
11546 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11547 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11549 if (TYPE_TEMPLATE_INFO (t
))
11551 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11552 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11560 /* Wrapper for xref_tag_1. */
11563 xref_tag (enum tag_types tag_code
, tree name
,
11564 tag_scope scope
, bool template_header_p
)
11567 timevar_start (TV_NAME_LOOKUP
);
11568 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
11569 timevar_stop (TV_NAME_LOOKUP
);
11575 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11577 enum tag_types tag_kind
;
11579 if (TREE_CODE (old
) == RECORD_TYPE
)
11580 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11582 tag_kind
= union_type
;
11584 if (id
== NULL_TREE
)
11585 id
= TYPE_IDENTIFIER (old
);
11587 return xref_tag (tag_kind
, id
, scope
, false);
11590 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11591 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11592 access_* node, and the TREE_VALUE is the type of the base-class.
11593 Non-NULL TREE_TYPE indicates virtual inheritance.
11595 Returns true if the binfo hierarchy was successfully created,
11596 false if an error was detected. */
11599 xref_basetypes (tree ref
, tree base_list
)
11602 tree binfo
, base_binfo
;
11603 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11604 unsigned max_bases
= 0; /* Maximum direct bases. */
11606 tree default_access
;
11607 tree igo_prev
; /* Track Inheritance Graph Order. */
11609 if (ref
== error_mark_node
)
11612 /* The base of a derived class is private by default, all others are
11614 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11615 && CLASSTYPE_DECLARED_CLASS (ref
)
11616 ? access_private_node
: access_public_node
);
11618 /* First, make sure that any templates in base-classes are
11619 instantiated. This ensures that if we call ourselves recursively
11620 we do not get confused about which classes are marked and which
11622 basep
= &base_list
;
11625 tree basetype
= TREE_VALUE (*basep
);
11627 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11628 && !complete_type_or_else (basetype
, NULL
))
11629 /* An incomplete type. Remove it from the list. */
11630 *basep
= TREE_CHAIN (*basep
);
11634 if (TREE_TYPE (*basep
))
11636 if (CLASS_TYPE_P (basetype
))
11637 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11638 basep
= &TREE_CHAIN (*basep
);
11642 TYPE_MARKED_P (ref
) = 1;
11644 /* The binfo slot should be empty, unless this is an (ill-formed)
11646 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11648 error ("redefinition of %q#T", ref
);
11652 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11654 binfo
= make_tree_binfo (max_bases
);
11656 TYPE_BINFO (ref
) = binfo
;
11657 BINFO_OFFSET (binfo
) = size_zero_node
;
11658 BINFO_TYPE (binfo
) = ref
;
11660 /* Apply base-class info set up to the variants of this type. */
11661 fixup_type_variants (ref
);
11665 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11666 /* An aggregate cannot have baseclasses. */
11667 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11669 if (TREE_CODE (ref
) == UNION_TYPE
)
11671 error ("derived union %qT invalid", ref
);
11678 if (TYPE_FOR_JAVA (ref
))
11680 error ("Java class %qT cannot have multiple bases", ref
);
11687 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11689 if (TYPE_FOR_JAVA (ref
))
11691 error ("Java class %qT cannot have virtual bases", ref
);
11696 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11698 tree access
= TREE_PURPOSE (base_list
);
11699 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11700 tree basetype
= TREE_VALUE (base_list
);
11702 if (access
== access_default_node
)
11703 access
= default_access
;
11705 if (PACK_EXPANSION_P (basetype
))
11706 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11707 if (TREE_CODE (basetype
) == TYPE_DECL
)
11708 basetype
= TREE_TYPE (basetype
);
11709 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11711 error ("base type %qT fails to be a struct or class type",
11716 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11717 TYPE_FOR_JAVA (ref
) = 1;
11719 base_binfo
= NULL_TREE
;
11720 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
11722 base_binfo
= TYPE_BINFO (basetype
);
11723 /* The original basetype could have been a typedef'd type. */
11724 basetype
= BINFO_TYPE (base_binfo
);
11726 /* Inherit flags from the base. */
11727 TYPE_HAS_NEW_OPERATOR (ref
)
11728 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11729 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11730 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11731 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11732 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11733 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11734 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11735 CLASSTYPE_REPEATED_BASE_P (ref
)
11736 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11739 /* We must do this test after we've seen through a typedef
11741 if (TYPE_MARKED_P (basetype
))
11743 if (basetype
== ref
)
11744 error ("recursive type %qT undefined", basetype
);
11746 error ("duplicate base type %qT invalid", basetype
);
11750 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11751 /* Regenerate the pack expansion for the bases. */
11752 basetype
= make_pack_expansion (basetype
);
11754 TYPE_MARKED_P (basetype
) = 1;
11756 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11757 &igo_prev
, via_virtual
);
11758 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11759 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11761 BINFO_BASE_APPEND (binfo
, base_binfo
);
11762 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11765 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
11766 /* If we have space in the vbase vector, we must have shared at
11767 least one of them, and are therefore diamond shaped. */
11768 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11770 /* Unmark all the types. */
11771 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11772 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11773 TYPE_MARKED_P (ref
) = 0;
11775 /* Now see if we have a repeated base type. */
11776 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11778 for (base_binfo
= binfo
; base_binfo
;
11779 base_binfo
= TREE_CHAIN (base_binfo
))
11781 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11783 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11786 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11788 for (base_binfo
= binfo
; base_binfo
;
11789 base_binfo
= TREE_CHAIN (base_binfo
))
11790 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11791 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11800 /* Copies the enum-related properties from type SRC to type DST.
11801 Used with the underlying type of an enum and the enum itself. */
11803 copy_type_enum (tree dst
, tree src
)
11805 TYPE_MIN_VALUE (dst
) = TYPE_MIN_VALUE (src
);
11806 TYPE_MAX_VALUE (dst
) = TYPE_MAX_VALUE (src
);
11807 TYPE_SIZE (dst
) = TYPE_SIZE (src
);
11808 TYPE_SIZE_UNIT (dst
) = TYPE_SIZE_UNIT (src
);
11809 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
11810 TYPE_PRECISION (dst
) = TYPE_PRECISION (src
);
11811 TYPE_ALIGN (dst
) = TYPE_ALIGN (src
);
11812 TYPE_USER_ALIGN (dst
) = TYPE_USER_ALIGN (src
);
11813 TYPE_UNSIGNED (dst
) = TYPE_UNSIGNED (src
);
11816 /* Begin compiling the definition of an enumeration type.
11819 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11821 UNDERLYING_TYPE is the type that will be used as the storage for
11822 the enumeration type. This should be NULL_TREE if no storage type
11825 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11827 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11829 Returns the type object, as yet incomplete.
11830 Also records info about it so that build_enumerator
11831 may be used to declare the individual values as they are read. */
11834 start_enum (tree name
, tree enumtype
, tree underlying_type
,
11835 bool scoped_enum_p
, bool *is_new
)
11837 tree prevtype
= NULL_TREE
;
11838 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11842 /* [C++0x dcl.enum]p5:
11844 If not explicitly specified, the underlying type of a scoped
11845 enumeration type is int. */
11846 if (!underlying_type
&& scoped_enum_p
)
11847 underlying_type
= integer_type_node
;
11849 if (underlying_type
)
11850 underlying_type
= cv_unqualified (underlying_type
);
11852 /* If this is the real definition for a previous forward reference,
11853 fill in the contents in the same object that used to be the
11854 forward reference. */
11856 enumtype
= lookup_and_check_tag (enum_type
, name
,
11857 /*tag_scope=*/ts_current
,
11858 /*template_header_p=*/false);
11860 /* In case of a template_decl, the only check that should be deferred
11861 to instantiation time is the comparison of underlying types. */
11862 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
11864 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
11866 error_at (input_location
, "scoped/unscoped mismatch "
11867 "in enum %q#T", enumtype
);
11868 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
11869 "previous definition here");
11870 enumtype
= error_mark_node
;
11872 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
11874 error_at (input_location
, "underlying type mismatch "
11875 "in enum %q#T", enumtype
);
11876 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
11877 "previous definition here");
11878 enumtype
= error_mark_node
;
11880 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
11881 && !dependent_type_p (underlying_type
)
11882 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
11883 && !same_type_p (underlying_type
,
11884 ENUM_UNDERLYING_TYPE (enumtype
)))
11886 error_at (input_location
, "different underlying type "
11887 "in enum %q#T", enumtype
);
11888 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
11889 "previous definition here");
11890 underlying_type
= NULL_TREE
;
11894 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
11895 || processing_template_decl
)
11897 /* In case of error, make a dummy enum to allow parsing to
11899 if (enumtype
== error_mark_node
)
11901 name
= make_anon_name ();
11902 enumtype
= NULL_TREE
;
11905 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11906 of an opaque enum, or an opaque enum of an already defined
11907 enumeration (C++0x only).
11908 In any other case, it'll be NULL_TREE. */
11914 prevtype
= enumtype
;
11915 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
11916 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
11917 if (enumtype
== error_mark_node
)
11918 return error_mark_node
;
11920 /* The enum is considered opaque until the opening '{' of the
11921 enumerator list. */
11922 SET_OPAQUE_ENUM_P (enumtype
, true);
11923 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
11926 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
11928 if (underlying_type
)
11930 if (CP_INTEGRAL_TYPE_P (underlying_type
))
11932 copy_type_enum (enumtype
, underlying_type
);
11933 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
11935 else if (dependent_type_p (underlying_type
))
11936 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
11938 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11939 underlying_type
, enumtype
);
11942 /* If into a template class, the returned enum is always the first
11943 declaration (opaque or not) seen. This way all the references to
11944 this type will be to the same declaration. The following ones are used
11945 only to check for definition errors. */
11946 if (prevtype
&& processing_template_decl
)
11952 /* After processing and defining all the values of an enumeration type,
11953 install their decls in the enumeration type.
11954 ENUMTYPE is the type object. */
11957 finish_enum_value_list (tree enumtype
)
11960 tree underlying_type
;
11963 tree minnode
, maxnode
;
11966 bool fixed_underlying_type_p
11967 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
11969 /* We built up the VALUES in reverse order. */
11970 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
11972 /* For an enum defined in a template, just set the type of the values;
11973 all further processing is postponed until the template is
11974 instantiated. We need to set the type so that tsubst of a CONST_DECL
11976 if (processing_template_decl
)
11978 for (values
= TYPE_VALUES (enumtype
);
11980 values
= TREE_CHAIN (values
))
11981 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
11985 /* Determine the minimum and maximum values of the enumerators. */
11986 if (TYPE_VALUES (enumtype
))
11988 minnode
= maxnode
= NULL_TREE
;
11990 for (values
= TYPE_VALUES (enumtype
);
11992 values
= TREE_CHAIN (values
))
11994 decl
= TREE_VALUE (values
);
11996 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11997 each enumerator has the type of its enumeration. Prior to the
11998 closing brace, the type of each enumerator is the type of its
11999 initializing value. */
12000 TREE_TYPE (decl
) = enumtype
;
12002 /* Update the minimum and maximum values, if appropriate. */
12003 value
= DECL_INITIAL (decl
);
12004 if (value
== error_mark_node
)
12005 value
= integer_zero_node
;
12006 /* Figure out what the minimum and maximum values of the
12007 enumerators are. */
12009 minnode
= maxnode
= value
;
12010 else if (tree_int_cst_lt (maxnode
, value
))
12012 else if (tree_int_cst_lt (value
, minnode
))
12019 If the enumerator-list is empty, the underlying type is as if
12020 the enumeration had a single enumerator with value 0. */
12021 minnode
= maxnode
= integer_zero_node
;
12023 if (!fixed_underlying_type_p
)
12025 /* Compute the number of bits require to represent all values of the
12026 enumeration. We must do this before the type of MINNODE and
12027 MAXNODE are transformed, since tree_int_cst_min_precision relies
12028 on the TREE_TYPE of the value it is passed. */
12029 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12030 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12031 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12032 int precision
= MAX (lowprec
, highprec
);
12034 bool use_short_enum
;
12036 /* Determine the underlying type of the enumeration.
12040 The underlying type of an enumeration is an integral type that
12041 can represent all the enumerator values defined in the
12042 enumeration. It is implementation-defined which integral type is
12043 used as the underlying type for an enumeration except that the
12044 underlying type shall not be larger than int unless the value of
12045 an enumerator cannot fit in an int or unsigned int.
12047 We use "int" or an "unsigned int" as the underlying type, even if
12048 a smaller integral type would work, unless the user has
12049 explicitly requested that we use the smallest possible type. The
12050 user can request that for all enumerations with a command line
12051 flag, or for just one enumeration with an attribute. */
12053 use_short_enum
= flag_short_enums
12054 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12056 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12060 underlying_type
= integer_types
[itk
];
12061 if (underlying_type
!= NULL_TREE
12062 && TYPE_PRECISION (underlying_type
) >= precision
12063 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12066 if (itk
== itk_none
)
12070 IF no integral type can represent all the enumerator values, the
12071 enumeration is ill-formed. */
12072 error ("no integral type can represent all of the enumerator values "
12073 "for %qT", enumtype
);
12074 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12075 underlying_type
= integer_types
[itk_unsigned_long_long
];
12080 The value of sizeof() applied to an enumeration type, an object
12081 of an enumeration type, or an enumerator, is the value of sizeof()
12082 applied to the underlying type. */
12083 copy_type_enum (enumtype
, underlying_type
);
12085 /* Compute the minimum and maximum values for the type.
12089 For an enumeration where emin is the smallest enumerator and emax
12090 is the largest, the values of the enumeration are the values of the
12091 underlying type in the range bmin to bmax, where bmin and bmax are,
12092 respectively, the smallest and largest values of the smallest bit-
12093 field that can store emin and emax. */
12095 /* The middle-end currently assumes that types with TYPE_PRECISION
12096 narrower than their underlying type are suitably zero or sign
12097 extended to fill their mode. Similarly, it assumes that the front
12098 end assures that a value of a particular type must be within
12099 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12101 We used to set these fields based on bmin and bmax, but that led
12102 to invalid assumptions like optimizing away bounds checking. So
12103 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12104 TYPE_MAX_VALUE to the values for the mode above and only restrict
12105 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12106 ENUM_UNDERLYING_TYPE (enumtype
)
12107 = build_distinct_type_copy (underlying_type
);
12108 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12109 set_min_and_max_values_for_integral_type
12110 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12112 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12113 if (flag_strict_enums
)
12114 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12118 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12120 /* Convert each of the enumerators to the type of the underlying
12121 type of the enumeration. */
12122 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12124 location_t saved_location
;
12126 decl
= TREE_VALUE (values
);
12127 saved_location
= input_location
;
12128 input_location
= DECL_SOURCE_LOCATION (decl
);
12129 if (fixed_underlying_type_p
)
12130 /* If the enumeration type has a fixed underlying type, we
12131 already checked all of the enumerator values. */
12132 value
= DECL_INITIAL (decl
);
12134 value
= perform_implicit_conversion (underlying_type
,
12135 DECL_INITIAL (decl
),
12136 tf_warning_or_error
);
12137 input_location
= saved_location
;
12139 /* Do not clobber shared ints. */
12140 value
= copy_node (value
);
12142 TREE_TYPE (value
) = enumtype
;
12143 DECL_INITIAL (decl
) = value
;
12146 /* Fix up all variant types of this enum type. */
12147 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12148 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12150 /* Finish debugging output for this type. */
12151 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12154 /* Finishes the enum type. This is called only the first time an
12155 enumeration is seen, be it opaque or odinary.
12156 ENUMTYPE is the type object. */
12159 finish_enum (tree enumtype
)
12161 if (processing_template_decl
)
12163 if (at_function_scope_p ())
12164 add_stmt (build_min (TAG_DEFN
, enumtype
));
12168 /* Here there should not be any variants of this type. */
12169 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12170 && !TYPE_NEXT_VARIANT (enumtype
));
12173 /* Build and install a CONST_DECL for an enumeration constant of the
12174 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12175 LOC is the location of NAME.
12176 Assignment of sequential values by default is handled here. */
12179 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12185 /* If the VALUE was erroneous, pretend it wasn't there; that will
12186 result in the enum being assigned the next value in sequence. */
12187 if (value
== error_mark_node
)
12190 /* Remove no-op casts from the value. */
12192 STRIP_TYPE_NOPS (value
);
12194 if (! processing_template_decl
)
12196 /* Validate and default VALUE. */
12197 if (value
!= NULL_TREE
)
12199 value
= cxx_constant_value (value
);
12201 if (TREE_CODE (value
) == INTEGER_CST
12202 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12204 value
= perform_integral_promotions (value
);
12208 error ("enumerator value for %qD is not an integer constant", name
);
12213 /* Default based on previous value. */
12214 if (value
== NULL_TREE
)
12216 if (TYPE_VALUES (enumtype
))
12219 unsigned HOST_WIDE_INT lo
;
12223 /* C++03 7.2/4: If no initializer is specified for the first
12224 enumerator, the type is an unspecified integral
12225 type. Otherwise the type is the same as the type of the
12226 initializing value of the preceding enumerator unless the
12227 incremented value is not representable in that type, in
12228 which case the type is an unspecified integral type
12229 sufficient to contain the incremented value. */
12230 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12231 if (error_operand_p (prev_value
))
12232 value
= error_mark_node
;
12235 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
12236 TREE_INT_CST_HIGH (prev_value
),
12241 tree type
= TREE_TYPE (prev_value
);
12242 bool pos
= (TYPE_UNSIGNED (type
) || hi
>= 0);
12243 di
.low
= lo
; di
.high
= hi
;
12244 if (!double_int_fits_to_tree_p (type
, di
))
12247 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12249 type
= integer_types
[itk
];
12250 if (type
!= NULL_TREE
12251 && (pos
|| !TYPE_UNSIGNED (type
))
12252 && double_int_fits_to_tree_p (type
, di
))
12255 if (type
&& cxx_dialect
< cxx0x
12256 && itk
> itk_unsigned_long
)
12257 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12258 incremented enumerator value is too large for %<unsigned long%>" : "\
12259 incremented enumerator value is too large for %<long%>");
12261 if (type
== NULL_TREE
)
12264 value
= double_int_to_tree (type
, di
);
12269 error ("overflow in enumeration values at %qD", name
);
12270 value
= error_mark_node
;
12275 value
= integer_zero_node
;
12278 /* Remove no-op casts from the value. */
12279 STRIP_TYPE_NOPS (value
);
12281 /* If the underlying type of the enum is fixed, check whether
12282 the enumerator values fits in the underlying type. If it
12283 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12284 if (ENUM_UNDERLYING_TYPE (enumtype
)
12286 && TREE_CODE (value
) == INTEGER_CST
12287 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12289 error ("enumerator value %E is too large for underlying type %<%T%>",
12290 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12292 /* Silently convert the value so that we can continue. */
12293 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12298 /* C++ associates enums with global, function, or class declarations. */
12299 context
= current_scope ();
12301 /* Build the actual enumeration constant. Note that the enumeration
12302 constants have the underlying type of the enum (if it is fixed)
12303 or the type of their initializer (if the underlying type of the
12304 enum is not fixed):
12308 If the underlying type is fixed, the type of each enumerator
12309 prior to the closing brace is the underlying type; if the
12310 initializing value of an enumerator cannot be represented by
12311 the underlying type, the program is ill-formed. If the
12312 underlying type is not fixed, the type of each enumerator is
12313 the type of its initializing value.
12315 If the underlying type is not fixed, it will be computed by
12316 finish_enum and we will reset the type of this enumerator. Of
12317 course, if we're processing a template, there may be no value. */
12318 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12320 if (context
&& context
== current_class_type
)
12321 /* This enum declaration is local to the class. We need the full
12322 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12323 decl
= build_lang_decl_loc (loc
, CONST_DECL
, name
, type
);
12325 /* It's a global enum, or it's local to a function. (Note local to
12326 a function could mean local to a class method. */
12327 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12329 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12330 TREE_CONSTANT (decl
) = 1;
12331 TREE_READONLY (decl
) = 1;
12332 DECL_INITIAL (decl
) = value
;
12334 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12335 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12336 on the TYPE_FIELDS list for `S'. (That's so that you can say
12337 things like `S::i' later.) */
12338 finish_member_declaration (decl
);
12342 /* Add this enumeration constant to the list for this type. */
12343 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12346 /* Look for an enumerator with the given NAME within the enumeration
12347 type ENUMTYPE. This routine is used primarily for qualified name
12348 lookup into an enumerator in C++0x, e.g.,
12350 enum class Color { Red, Green, Blue };
12352 Color color = Color::Red;
12354 Returns the value corresponding to the enumerator, or
12355 NULL_TREE if no such enumerator was found. */
12357 lookup_enumerator (tree enumtype
, tree name
)
12360 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12362 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12363 return e
? TREE_VALUE (e
) : NULL_TREE
;
12367 /* We're defining DECL. Make sure that its type is OK. */
12370 check_function_type (tree decl
, tree current_function_parms
)
12372 tree fntype
= TREE_TYPE (decl
);
12373 tree return_type
= complete_type (TREE_TYPE (fntype
));
12375 /* In a function definition, arg types must be complete. */
12376 require_complete_types_for_parms (current_function_parms
);
12378 if (dependent_type_p (return_type
))
12380 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12381 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12383 tree args
= TYPE_ARG_TYPES (fntype
);
12385 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12386 error ("return type %q#T is incomplete", return_type
);
12388 error ("return type has Java class type %q#T", return_type
);
12390 /* Make it return void instead. */
12391 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12392 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12394 TREE_CHAIN (args
));
12396 fntype
= build_function_type (void_type_node
, args
);
12398 = build_exception_variant (fntype
,
12399 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12400 fntype
= (cp_build_type_attribute_variant
12401 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12402 TREE_TYPE (decl
) = fntype
;
12405 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12408 /* Create the FUNCTION_DECL for a function definition.
12409 DECLSPECS and DECLARATOR are the parts of the declaration;
12410 they describe the function's name and the type it returns,
12411 but twisted together in a fashion that parallels the syntax of C.
12413 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12414 DECLARATOR is really the DECL for the function we are about to
12415 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12416 indicating that the function is an inline defined in-class.
12418 This function creates a binding context for the function body
12419 as well as setting up the FUNCTION_DECL in current_function_decl.
12421 For C++, we must first check whether that datum makes any sense.
12422 For example, "class A local_a(1,2);" means that variable local_a
12423 is an aggregate of type A, which should have a constructor
12424 applied to it with the argument list [1, 2].
12426 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12427 or may be a BLOCK if the function has been defined previously
12428 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12429 error_mark_node if the function has never been defined, or
12430 a BLOCK if the function has been defined somewhere. */
12433 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12435 tree ctype
= NULL_TREE
;
12438 int doing_friend
= 0;
12439 struct cp_binding_level
*bl
;
12440 tree current_function_parms
;
12441 struct c_fileinfo
*finfo
12442 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12443 bool honor_interface
;
12445 /* Sanity check. */
12446 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12447 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12449 fntype
= TREE_TYPE (decl1
);
12450 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12451 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12453 /* ISO C++ 11.4/5. A friend function defined in a class is in
12454 the (lexical) scope of the class in which it is defined. */
12455 if (!ctype
&& DECL_FRIEND_P (decl1
))
12457 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12459 /* CTYPE could be null here if we're dealing with a template;
12460 for example, `inline friend float foo()' inside a template
12461 will have no CTYPE set. */
12462 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12468 if (DECL_DECLARED_INLINE_P (decl1
)
12469 && lookup_attribute ("noinline", attrs
))
12470 warning (0, "inline function %q+D given attribute noinline", decl1
);
12472 /* Handle gnu_inline attribute. */
12473 if (GNU_INLINE_P (decl1
))
12475 DECL_EXTERNAL (decl1
) = 1;
12476 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12477 DECL_INTERFACE_KNOWN (decl1
) = 1;
12478 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12481 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12482 /* This is a constructor, we must ensure that any default args
12483 introduced by this definition are propagated to the clones
12484 now. The clones are used directly in overload resolution. */
12485 adjust_clone_args (decl1
);
12487 /* Sometimes we don't notice that a function is a static member, and
12488 build a METHOD_TYPE for it. Fix that up now. */
12489 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12490 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12492 /* Set up current_class_type, and enter the scope of the class, if
12495 push_nested_class (ctype
);
12496 else if (DECL_STATIC_FUNCTION_P (decl1
))
12497 push_nested_class (DECL_CONTEXT (decl1
));
12499 /* Now that we have entered the scope of the class, we must restore
12500 the bindings for any template parameters surrounding DECL1, if it
12501 is an inline member template. (Order is important; consider the
12502 case where a template parameter has the same name as a field of
12503 the class.) It is not until after this point that
12504 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12505 if (flags
& SF_INCLASS_INLINE
)
12506 maybe_begin_member_template_processing (decl1
);
12508 /* Effective C++ rule 15. */
12510 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12511 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12512 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
12514 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12515 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12516 if (!DECL_INITIAL (decl1
))
12517 DECL_INITIAL (decl1
) = error_mark_node
;
12519 /* This function exists in static storage.
12520 (This does not mean `static' in the C sense!) */
12521 TREE_STATIC (decl1
) = 1;
12523 /* We must call push_template_decl after current_class_type is set
12524 up. (If we are processing inline definitions after exiting a
12525 class scope, current_class_type will be NULL_TREE until set above
12526 by push_nested_class.) */
12527 if (processing_template_decl
)
12529 /* FIXME: Handle error_mark_node more gracefully. */
12530 tree newdecl1
= push_template_decl (decl1
);
12531 if (newdecl1
!= error_mark_node
)
12535 /* We are now in the scope of the function being defined. */
12536 current_function_decl
= decl1
;
12538 /* Save the parm names or decls from this function's declarator
12539 where store_parm_decls will find them. */
12540 current_function_parms
= DECL_ARGUMENTS (decl1
);
12542 /* Make sure the parameter and return types are reasonable. When
12543 you declare a function, these types can be incomplete, but they
12544 must be complete when you define the function. */
12545 check_function_type (decl1
, current_function_parms
);
12547 /* Build the return declaration for the function. */
12548 restype
= TREE_TYPE (fntype
);
12549 if (DECL_RESULT (decl1
) == NULL_TREE
)
12553 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
12554 DECL_ARTIFICIAL (resdecl
) = 1;
12555 DECL_IGNORED_P (resdecl
) = 1;
12556 DECL_RESULT (decl1
) = resdecl
;
12558 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
12561 /* Let the user know we're compiling this function. */
12562 announce_function (decl1
);
12564 /* Record the decl so that the function name is defined.
12565 If we already have a decl for this name, and it is a FUNCTION_DECL,
12566 use the old decl. */
12567 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12569 /* A specialization is not used to guide overload resolution. */
12570 if (!DECL_FUNCTION_MEMBER_P (decl1
)
12571 && !(DECL_USE_TEMPLATE (decl1
) &&
12572 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
12574 tree olddecl
= pushdecl (decl1
);
12576 if (olddecl
== error_mark_node
)
12577 /* If something went wrong when registering the declaration,
12578 use DECL1; we have to have a FUNCTION_DECL to use when
12579 parsing the body of the function. */
12583 /* Otherwise, OLDDECL is either a previous declaration
12584 of the same function or DECL1 itself. */
12586 if (warn_missing_declarations
12587 && olddecl
== decl1
12588 && !DECL_MAIN_P (decl1
)
12589 && TREE_PUBLIC (decl1
)
12590 && !DECL_DECLARED_INLINE_P (decl1
))
12594 /* Check whether DECL1 is in an anonymous
12596 for (context
= DECL_CONTEXT (decl1
);
12598 context
= DECL_CONTEXT (context
))
12600 if (TREE_CODE (context
) == NAMESPACE_DECL
12601 && DECL_NAME (context
) == NULL_TREE
)
12605 if (context
== NULL
)
12606 warning (OPT_Wmissing_declarations
,
12607 "no previous declaration for %q+D", decl1
);
12615 /* We need to set the DECL_CONTEXT. */
12616 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12617 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12619 fntype
= TREE_TYPE (decl1
);
12621 /* If #pragma weak applies, mark the decl appropriately now.
12622 The pragma only applies to global functions. Because
12623 determining whether or not the #pragma applies involves
12624 computing the mangled name for the declaration, we cannot
12625 apply the pragma until after we have merged this declaration
12626 with any previous declarations; if the original declaration
12627 has a linkage specification, that specification applies to
12628 the definition as well, and may affect the mangled name. */
12629 if (DECL_FILE_SCOPE_P (decl1
))
12630 maybe_apply_pragma_weak (decl1
);
12633 /* constexpr functions must have literal argument types and
12634 literal return type. */
12635 validate_constexpr_fundecl (decl1
);
12637 /* Reset this in case the call to pushdecl changed it. */
12638 current_function_decl
= decl1
;
12640 gcc_assert (DECL_INITIAL (decl1
));
12642 /* This function may already have been parsed, in which case just
12643 return; our caller will skip over the body without parsing. */
12644 if (DECL_INITIAL (decl1
) != error_mark_node
)
12647 /* Initialize RTL machinery. We cannot do this until
12648 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12649 even when processing a template; this is how we get
12650 CFUN set up, and our per-function variables initialized.
12651 FIXME factor out the non-RTL stuff. */
12652 bl
= current_binding_level
;
12653 allocate_struct_function (decl1
, processing_template_decl
);
12655 /* Initialize the language data structures. Whenever we start
12656 a new function, we destroy temporaries in the usual way. */
12657 cfun
->language
= ggc_alloc_cleared_language_function ();
12658 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12659 current_binding_level
= bl
;
12661 /* Start the statement-tree, start the tree now. */
12662 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12664 /* If we are (erroneously) defining a function that we have already
12665 defined before, wipe out what we knew before. */
12666 if (!DECL_PENDING_INLINE_P (decl1
))
12667 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12669 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12671 /* We know that this was set up by `grokclassfn'. We do not
12672 wait until `store_parm_decls', since evil parse errors may
12673 never get us to that point. Here we keep the consistency
12674 between `current_class_type' and `current_class_ptr'. */
12675 tree t
= DECL_ARGUMENTS (decl1
);
12677 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12678 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12680 cp_function_chain
->x_current_class_ref
12681 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12682 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12683 cp_function_chain
->x_current_class_ptr
= t
;
12685 /* Constructors and destructors need to know whether they're "in
12686 charge" of initializing virtual base classes. */
12687 t
= DECL_CHAIN (t
);
12688 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12690 current_in_charge_parm
= t
;
12691 t
= DECL_CHAIN (t
);
12693 if (DECL_HAS_VTT_PARM_P (decl1
))
12695 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12696 current_vtt_parm
= t
;
12700 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12701 /* Implicitly-defined methods (like the
12702 destructor for a class in which no destructor
12703 is explicitly declared) must not be defined
12704 until their definition is needed. So, we
12705 ignore interface specifications for
12706 compiler-generated functions. */
12707 && !DECL_ARTIFICIAL (decl1
));
12709 if (processing_template_decl
)
12710 /* Don't mess with interface flags. */;
12711 else if (DECL_INTERFACE_KNOWN (decl1
))
12713 tree ctx
= decl_function_context (decl1
);
12715 if (DECL_NOT_REALLY_EXTERN (decl1
))
12716 DECL_EXTERNAL (decl1
) = 0;
12718 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12719 && TREE_PUBLIC (ctx
))
12720 /* This is a function in a local class in an extern inline
12722 comdat_linkage (decl1
);
12724 /* If this function belongs to an interface, it is public.
12725 If it belongs to someone else's interface, it is also external.
12726 This only affects inlines and template instantiations. */
12727 else if (!finfo
->interface_unknown
&& honor_interface
)
12729 if (DECL_DECLARED_INLINE_P (decl1
)
12730 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12732 DECL_EXTERNAL (decl1
)
12733 = (finfo
->interface_only
12734 || (DECL_DECLARED_INLINE_P (decl1
)
12735 && ! flag_implement_inlines
12736 && !DECL_VINDEX (decl1
)));
12738 /* For WIN32 we also want to put these in linkonce sections. */
12739 maybe_make_one_only (decl1
);
12742 DECL_EXTERNAL (decl1
) = 0;
12743 DECL_INTERFACE_KNOWN (decl1
) = 1;
12744 /* If this function is in an interface implemented in this file,
12745 make sure that the back end knows to emit this function
12747 if (!DECL_EXTERNAL (decl1
))
12748 mark_needed (decl1
);
12750 else if (finfo
->interface_unknown
&& finfo
->interface_only
12751 && honor_interface
)
12753 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12754 interface, we will have both finfo->interface_unknown and
12755 finfo->interface_only set. In that case, we don't want to
12756 use the normal heuristics because someone will supply a
12757 #pragma implementation elsewhere, and deducing it here would
12758 produce a conflict. */
12759 comdat_linkage (decl1
);
12760 DECL_EXTERNAL (decl1
) = 0;
12761 DECL_INTERFACE_KNOWN (decl1
) = 1;
12762 DECL_DEFER_OUTPUT (decl1
) = 1;
12766 /* This is a definition, not a reference.
12767 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12768 if (!GNU_INLINE_P (decl1
))
12769 DECL_EXTERNAL (decl1
) = 0;
12771 if ((DECL_DECLARED_INLINE_P (decl1
)
12772 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12773 && ! DECL_INTERFACE_KNOWN (decl1
))
12774 DECL_DEFER_OUTPUT (decl1
) = 1;
12776 DECL_INTERFACE_KNOWN (decl1
) = 1;
12779 /* Determine the ELF visibility attribute for the function. We must not
12780 do this before calling "pushdecl", as we must allow "duplicate_decls"
12781 to merge any attributes appropriately. We also need to wait until
12783 if (!DECL_CLONED_FUNCTION_P (decl1
))
12784 determine_visibility (decl1
);
12786 begin_scope (sk_function_parms
, decl1
);
12790 if (DECL_DESTRUCTOR_P (decl1
)
12791 || (DECL_CONSTRUCTOR_P (decl1
)
12792 && targetm
.cxx
.cdtor_returns_this ()))
12794 cdtor_label
= build_decl (input_location
,
12795 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12796 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12799 start_fname_decls ();
12801 store_parm_decls (current_function_parms
);
12805 /* Like start_preparsed_function, except that instead of a
12806 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12808 Returns 1 on success. If the DECLARATOR is not suitable for a function
12809 (it defines a datum instead), we return 0, which tells
12810 yyparse to report a parse error. */
12813 start_function (cp_decl_specifier_seq
*declspecs
,
12814 const cp_declarator
*declarator
,
12819 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
12820 if (decl1
== error_mark_node
)
12822 /* If the declarator is not suitable for a function definition,
12823 cause a syntax error. */
12824 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
12826 error ("invalid function declaration");
12830 if (DECL_MAIN_P (decl1
))
12831 /* main must return int. grokfndecl should have corrected it
12832 (and issued a diagnostic) if the user got it wrong. */
12833 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
12834 integer_type_node
));
12836 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
12841 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12845 use_eh_spec_block (tree fn
)
12847 return (flag_exceptions
&& flag_enforce_eh_specs
12848 && !processing_template_decl
12849 && !type_throw_all_p (TREE_TYPE (fn
))
12850 /* We insert the EH_SPEC_BLOCK only in the original
12851 function; then, it is copied automatically to the
12853 && !DECL_CLONED_FUNCTION_P (fn
)
12854 /* Implicitly-generated constructors and destructors have
12855 exception specifications. However, those specifications
12856 are the union of the possible exceptions specified by the
12857 constructors/destructors for bases and members, so no
12858 unallowed exception will ever reach this function. By
12859 not creating the EH_SPEC_BLOCK we save a little memory,
12860 and we avoid spurious warnings about unreachable
12862 && !DECL_DEFAULTED_FN (fn
));
12865 /* Store the parameter declarations into the current function declaration.
12866 This is called after parsing the parameter declarations, before
12867 digesting the body of the function.
12869 Also install to binding contour return value identifier, if any. */
12872 store_parm_decls (tree current_function_parms
)
12874 tree fndecl
= current_function_decl
;
12877 /* This is a chain of any other decls that came in among the parm
12878 declarations. If a parm is declared with enum {foo, bar} x;
12879 then CONST_DECLs for foo and bar are put here. */
12880 tree nonparms
= NULL_TREE
;
12882 if (current_function_parms
)
12884 /* This case is when the function was defined with an ANSI prototype.
12885 The parms already have decls, so we need not do anything here
12886 except record them as in effect
12887 and complain if any redundant old-style parm decls were written. */
12889 tree specparms
= current_function_parms
;
12892 /* Must clear this because it might contain TYPE_DECLs declared
12894 current_binding_level
->names
= NULL
;
12896 /* If we're doing semantic analysis, then we'll call pushdecl
12897 for each of these. We must do them in reverse order so that
12898 they end in the correct forward order. */
12899 specparms
= nreverse (specparms
);
12901 for (parm
= specparms
; parm
; parm
= next
)
12903 next
= DECL_CHAIN (parm
);
12904 if (TREE_CODE (parm
) == PARM_DECL
)
12906 if (DECL_NAME (parm
) == NULL_TREE
12907 || TREE_CODE (parm
) != VOID_TYPE
)
12910 error ("parameter %qD declared void", parm
);
12914 /* If we find an enum constant or a type tag,
12915 put it aside for the moment. */
12916 TREE_CHAIN (parm
) = NULL_TREE
;
12917 nonparms
= chainon (nonparms
, parm
);
12921 /* Get the decls in their original chain order and record in the
12922 function. This is all and only the PARM_DECLs that were
12923 pushed into scope by the loop above. */
12924 DECL_ARGUMENTS (fndecl
) = getdecls ();
12927 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
12929 /* Now store the final chain of decls for the arguments
12930 as the decl-chain of the current lexical scope.
12931 Put the enumerators in as well, at the front so that
12932 DECL_ARGUMENTS is not modified. */
12933 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
12935 if (use_eh_spec_block (current_function_decl
))
12936 current_eh_spec_block
= begin_eh_spec_block ();
12940 /* We have finished doing semantic analysis on DECL, but have not yet
12941 generated RTL for its body. Save away our current state, so that
12942 when we want to generate RTL later we know what to do. */
12945 save_function_data (tree decl
)
12947 struct language_function
*f
;
12949 /* Save the language-specific per-function data so that we can
12950 get it back when we really expand this function. */
12951 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
12954 f
= ggc_alloc_language_function ();
12955 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
12956 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
12958 /* Clear out the bits we don't need. */
12959 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
12960 f
->bindings
= NULL
;
12961 f
->x_local_names
= NULL
;
12965 /* Set the return value of the constructor (if present). */
12968 finish_constructor_body (void)
12973 if (targetm
.cxx
.cdtor_returns_this ()
12974 && (! TYPE_FOR_JAVA (current_class_type
)))
12976 /* Any return from a constructor will end up here. */
12977 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
12979 val
= DECL_ARGUMENTS (current_function_decl
);
12980 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
12981 DECL_RESULT (current_function_decl
), val
);
12982 /* Return the address of the object. */
12983 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
12984 add_stmt (exprstmt
);
12988 /* Do all the processing for the beginning of a destructor; set up the
12989 vtable pointers and cleanups for bases and members. */
12992 begin_destructor_body (void)
12994 tree compound_stmt
;
12996 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12997 issued an error message. We still want to try to process the
12998 body of the function, but initialize_vtbl_ptrs will crash if
12999 TYPE_BINFO is NULL. */
13000 if (COMPLETE_TYPE_P (current_class_type
))
13002 compound_stmt
= begin_compound_stmt (0);
13003 /* Make all virtual function table pointers in non-virtual base
13004 classes point to CURRENT_CLASS_TYPE's virtual function
13006 initialize_vtbl_ptrs (current_class_ptr
);
13007 finish_compound_stmt (compound_stmt
);
13009 /* And insert cleanups for our bases and members so that they
13010 will be properly destroyed if we throw. */
13011 push_base_cleanups ();
13015 /* At the end of every destructor we generate code to delete the object if
13016 necessary. Do that now. */
13019 finish_destructor_body (void)
13023 /* Any return from a destructor will end up here; that way all base
13024 and member cleanups will be run when the function returns. */
13025 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13027 /* In a virtual destructor, we must call delete. */
13028 if (DECL_VIRTUAL_P (current_function_decl
))
13031 tree virtual_size
= cxx_sizeof (current_class_type
);
13035 At the point of definition of a virtual destructor (including
13036 an implicit definition), non-placement operator delete shall
13037 be looked up in the scope of the destructor's class and if
13038 found shall be accessible and unambiguous. */
13039 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
13041 /*global_p=*/false,
13042 /*placement=*/NULL_TREE
,
13043 /*alloc_fn=*/NULL_TREE
);
13045 if_stmt
= begin_if_stmt ();
13046 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13047 current_in_charge_parm
,
13050 finish_expr_stmt (exprstmt
);
13051 finish_then_clause (if_stmt
);
13052 finish_if_stmt (if_stmt
);
13055 if (targetm
.cxx
.cdtor_returns_this ())
13059 val
= DECL_ARGUMENTS (current_function_decl
);
13060 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13061 DECL_RESULT (current_function_decl
), val
);
13062 /* Return the address of the object. */
13063 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13064 add_stmt (exprstmt
);
13068 /* Do the necessary processing for the beginning of a function body, which
13069 in this case includes member-initializers, but not the catch clauses of
13070 a function-try-block. Currently, this means opening a binding level
13071 for the member-initializers (in a ctor), member cleanups (in a dtor),
13072 and capture proxies (in a lambda operator()). */
13075 begin_function_body (void)
13079 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13082 if (processing_template_decl
)
13083 /* Do nothing now. */;
13085 /* Always keep the BLOCK node associated with the outermost pair of
13086 curly braces of a function. These are needed for correct
13087 operation of dwarfout.c. */
13088 keep_next_level (true);
13090 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13092 if (processing_template_decl
)
13093 /* Do nothing now. */;
13094 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13095 begin_destructor_body ();
13100 /* Do the processing for the end of a function body. Currently, this means
13101 closing out the cleanups for fully-constructed bases and members, and in
13102 the case of the destructor, deleting the object if desired. Again, this
13103 is only meaningful for [cd]tors, since they are the only functions where
13104 there is a significant distinction between the main body and any
13105 function catch clauses. Handling, say, main() return semantics here
13106 would be wrong, as flowing off the end of a function catch clause for
13107 main() would also need to return 0. */
13110 finish_function_body (tree compstmt
)
13112 if (compstmt
== NULL_TREE
)
13115 /* Close the block. */
13116 finish_compound_stmt (compstmt
);
13118 if (processing_template_decl
)
13119 /* Do nothing now. */;
13120 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13121 finish_constructor_body ();
13122 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13123 finish_destructor_body ();
13126 /* Given a function, returns the BLOCK corresponding to the outermost level
13127 of curly braces, skipping the artificial block created for constructor
13131 outer_curly_brace_block (tree fndecl
)
13133 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13134 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13135 /* Skip the artificial function body block. */
13136 block
= BLOCK_SUBBLOCKS (block
);
13140 /* If FNDECL is a class's key method, add the class to the list of
13141 keyed classes that should be emitted. */
13144 record_key_method_defined (tree fndecl
)
13146 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13147 && DECL_VIRTUAL_P (fndecl
)
13148 && !processing_template_decl
)
13150 tree fnclass
= DECL_CONTEXT (fndecl
);
13151 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13152 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13156 /* Subroutine of finish_function.
13157 Save the body of constexpr functions for possible
13158 future compile time evaluation. */
13161 maybe_save_function_definition (tree fun
)
13163 if (!processing_template_decl
13164 && DECL_DECLARED_CONSTEXPR_P (fun
)
13165 && !DECL_CLONED_FUNCTION_P (fun
))
13166 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13169 /* Finish up a function declaration and compile that function
13170 all the way to assembler language output. The free the storage
13171 for the function definition.
13173 FLAGS is a bitwise or of the following values:
13175 We just finished processing the body of an in-class inline
13176 function definition. (This processing will have taken place
13177 after the class definition is complete.) */
13180 finish_function (int flags
)
13182 tree fndecl
= current_function_decl
;
13183 tree fntype
, ctype
= NULL_TREE
;
13184 int inclass_inline
= (flags
& 2) != 0;
13186 /* When we get some parse errors, we can end up without a
13187 current_function_decl, so cope. */
13188 if (fndecl
== NULL_TREE
)
13189 return error_mark_node
;
13191 if (c_dialect_objc ())
13192 objc_finish_function ();
13194 gcc_assert (!defer_mark_used_calls
);
13195 defer_mark_used_calls
= true;
13197 record_key_method_defined (fndecl
);
13199 fntype
= TREE_TYPE (fndecl
);
13201 /* TREE_READONLY (fndecl) = 1;
13202 This caused &foo to be of type ptr-to-const-function
13203 which then got a warning when stored in a ptr-to-function variable. */
13205 gcc_assert (building_stmt_list_p ());
13206 /* The current function is being defined, so its DECL_INITIAL should
13207 be set, and unless there's a multiple definition, it should be
13208 error_mark_node. */
13209 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13211 /* For a cloned function, we've already got all the code we need;
13212 there's no need to add any extra bits. */
13213 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13215 if (DECL_MAIN_P (current_function_decl
))
13219 /* Make it so that `main' always returns 0 by default (or
13222 stmt
= finish_return_stmt (integer_one_node
);
13224 stmt
= finish_return_stmt (integer_zero_node
);
13226 /* Hack. We don't want the middle-end to warn that this
13227 return is unreachable, so put the statement on the
13230 location_t linezero
= linemap_line_start (line_table
, 0, 1);
13231 SET_EXPR_LOCATION (stmt
, linezero
);
13235 if (use_eh_spec_block (current_function_decl
))
13236 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13237 (TREE_TYPE (current_function_decl
)),
13238 current_eh_spec_block
);
13241 /* If we're saving up tree structure, tie off the function now. */
13242 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13244 finish_fname_decls ();
13246 /* If this function can't throw any exceptions, remember that. */
13247 if (!processing_template_decl
13248 && !cp_function_chain
->can_throw
13249 && !flag_non_call_exceptions
13250 && !decl_replaceable_p (fndecl
))
13251 TREE_NOTHROW (fndecl
) = 1;
13253 /* This must come after expand_function_end because cleanups might
13254 have declarations (from inline functions) that need to go into
13255 this function's blocks. */
13257 /* If the current binding level isn't the outermost binding level
13258 for this function, either there is a bug, or we have experienced
13259 syntax errors and the statement tree is malformed. */
13260 if (current_binding_level
->kind
!= sk_function_parms
)
13262 /* Make sure we have already experienced errors. */
13263 gcc_assert (errorcount
);
13265 /* Throw away the broken statement tree and extra binding
13267 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13269 while (current_binding_level
->kind
!= sk_function_parms
)
13271 if (current_binding_level
->kind
== sk_class
)
13272 pop_nested_class ();
13274 poplevel (0, 0, 0);
13277 poplevel (1, 0, 1);
13279 /* Statements should always be full-expressions at the outermost set
13280 of curly braces for a function. */
13281 gcc_assert (stmts_are_full_exprs_p ());
13283 /* Save constexpr function body before it gets munged by
13284 the NRV transformation. */
13285 maybe_save_function_definition (fndecl
);
13287 /* Set up the named return value optimization, if we can. Candidate
13288 variables are selected in check_return_expr. */
13289 if (current_function_return_value
)
13291 tree r
= current_function_return_value
;
13294 if (r
!= error_mark_node
13295 /* This is only worth doing for fns that return in memory--and
13296 simpler, since we don't have to worry about promoted modes. */
13297 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13298 /* Only allow this for variables declared in the outer scope of
13299 the function so we know that their lifetime always ends with a
13300 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13301 we were to do this optimization in tree-ssa. */
13302 && (outer
= outer_curly_brace_block (fndecl
))
13303 && chain_member (r
, BLOCK_VARS (outer
)))
13304 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13306 current_function_return_value
= NULL_TREE
;
13309 /* Remember that we were in class scope. */
13310 if (current_class_name
)
13311 ctype
= current_class_type
;
13313 /* Must mark the RESULT_DECL as being in this function. */
13314 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13316 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13317 to the FUNCTION_DECL node itself. */
13318 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13320 /* Save away current state, if appropriate. */
13321 if (!processing_template_decl
)
13322 save_function_data (fndecl
);
13324 /* Complain if there's just no return statement. */
13325 if (warn_return_type
13326 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13327 && !dependent_type_p (TREE_TYPE (fntype
))
13328 && !current_function_returns_value
&& !current_function_returns_null
13329 /* Don't complain if we abort or throw. */
13330 && !current_function_returns_abnormally
13331 /* Don't complain if we are declared noreturn. */
13332 && !TREE_THIS_VOLATILE (fndecl
)
13333 && !DECL_NAME (DECL_RESULT (fndecl
))
13334 && !TREE_NO_WARNING (fndecl
)
13335 /* Structor return values (if any) are set by the compiler. */
13336 && !DECL_CONSTRUCTOR_P (fndecl
)
13337 && !DECL_DESTRUCTOR_P (fndecl
))
13339 warning (OPT_Wreturn_type
,
13340 "no return statement in function returning non-void");
13341 TREE_NO_WARNING (fndecl
) = 1;
13344 /* Store the end of the function, so that we get good line number
13345 info for the epilogue. */
13346 cfun
->function_end_locus
= input_location
;
13348 /* Complain about parameters that are only set, but never otherwise used. */
13349 if (warn_unused_but_set_parameter
13350 && !processing_template_decl
13351 && errorcount
== unused_but_set_errorcount
13352 && !DECL_CLONED_FUNCTION_P (fndecl
))
13356 for (decl
= DECL_ARGUMENTS (fndecl
);
13358 decl
= DECL_CHAIN (decl
))
13359 if (TREE_USED (decl
)
13360 && TREE_CODE (decl
) == PARM_DECL
13361 && !DECL_READ_P (decl
)
13362 && DECL_NAME (decl
)
13363 && !DECL_ARTIFICIAL (decl
)
13364 && !TREE_NO_WARNING (decl
)
13365 && !DECL_IN_SYSTEM_HEADER (decl
)
13366 && TREE_TYPE (decl
) != error_mark_node
13367 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13368 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13369 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13370 warning (OPT_Wunused_but_set_parameter
,
13371 "parameter %q+D set but not used", decl
);
13372 unused_but_set_errorcount
= errorcount
;
13375 /* Genericize before inlining. */
13376 if (!processing_template_decl
)
13378 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13379 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13380 cp_genericize (fndecl
);
13381 /* Clear out the bits we don't need. */
13382 f
->x_current_class_ptr
= NULL
;
13383 f
->x_current_class_ref
= NULL
;
13384 f
->x_eh_spec_block
= NULL
;
13385 f
->x_in_charge_parm
= NULL
;
13386 f
->x_vtt_parm
= NULL
;
13387 f
->x_return_value
= NULL
;
13388 f
->bindings
= NULL
;
13389 f
->extern_decl_map
= NULL
;
13391 /* Clear out the bits we don't need. */
13392 local_names
= NULL
;
13394 /* We're leaving the context of this function, so zap cfun. It's still in
13395 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13397 current_function_decl
= NULL
;
13399 /* If this is an in-class inline definition, we may have to pop the
13400 bindings for the template parameters that we added in
13401 maybe_begin_member_template_processing when start_function was
13403 if (inclass_inline
)
13404 maybe_end_member_template_processing ();
13406 /* Leave the scope of the class. */
13408 pop_nested_class ();
13413 current_function_decl
= NULL_TREE
;
13415 defer_mark_used_calls
= false;
13416 if (deferred_mark_used_calls
)
13421 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13423 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13429 /* Create the FUNCTION_DECL for a function definition.
13430 DECLSPECS and DECLARATOR are the parts of the declaration;
13431 they describe the return type and the name of the function,
13432 but twisted together in a fashion that parallels the syntax of C.
13434 This function creates a binding context for the function body
13435 as well as setting up the FUNCTION_DECL in current_function_decl.
13437 Returns a FUNCTION_DECL on success.
13439 If the DECLARATOR is not suitable for a function (it defines a datum
13440 instead), we return 0, which tells yyparse to report a parse error.
13442 May return void_type_node indicating that this method is actually
13443 a friend. See grokfield for more details.
13445 Came here with a `.pushlevel' .
13447 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13448 CHANGES TO CODE IN `grokfield'. */
13451 grokmethod (cp_decl_specifier_seq
*declspecs
,
13452 const cp_declarator
*declarator
, tree attrlist
)
13454 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13457 if (fndecl
== error_mark_node
)
13458 return error_mark_node
;
13460 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13462 error ("invalid member function declaration");
13463 return error_mark_node
;
13467 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13469 /* Pass friends other than inline friend functions back. */
13470 if (fndecl
== void_type_node
)
13473 if (DECL_IN_AGGR_P (fndecl
))
13475 if (DECL_CLASS_SCOPE_P (fndecl
))
13476 error ("%qD is already defined in class %qT", fndecl
,
13477 DECL_CONTEXT (fndecl
));
13478 return error_mark_node
;
13481 check_template_shadow (fndecl
);
13483 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13484 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13486 /* We process method specializations in finish_struct_1. */
13487 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13489 fndecl
= push_template_decl (fndecl
);
13490 if (fndecl
== error_mark_node
)
13494 if (! DECL_FRIEND_P (fndecl
))
13496 if (DECL_CHAIN (fndecl
))
13498 fndecl
= copy_node (fndecl
);
13499 TREE_CHAIN (fndecl
) = NULL_TREE
;
13503 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
13505 DECL_IN_AGGR_P (fndecl
) = 1;
13510 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13511 we can lay it out later, when and if its type becomes complete. */
13514 maybe_register_incomplete_var (tree var
)
13516 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
13518 /* Keep track of variables with incomplete types. */
13519 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
13520 && DECL_EXTERNAL (var
))
13522 tree inner_type
= TREE_TYPE (var
);
13524 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
13525 inner_type
= TREE_TYPE (inner_type
);
13526 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
13528 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
13529 /* RTTI TD entries are created while defining the type_info. */
13530 || (TYPE_LANG_SPECIFIC (inner_type
)
13531 && TYPE_BEING_DEFINED (inner_type
)))
13534 = VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, NULL
);
13536 iv
->incomplete_type
= inner_type
;
13541 /* Called when a class type (given by TYPE) is defined. If there are
13542 any existing VAR_DECLs whose type has been completed by this
13543 declaration, update them now. */
13546 complete_vars (tree type
)
13549 incomplete_var
*iv
;
13551 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
13553 if (same_type_p (type
, iv
->incomplete_type
))
13555 tree var
= iv
->decl
;
13556 tree type
= TREE_TYPE (var
);
13557 /* Complete the type of the variable. The VAR_DECL itself
13558 will be laid out in expand_expr. */
13559 complete_type (type
);
13560 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
13561 /* Remove this entry from the list. */
13562 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
13568 /* Check for pending declarations which may have abstract type. */
13569 complete_type_check_abstract (type
);
13572 /* If DECL is of a type which needs a cleanup, build and return an
13573 expression to perform that cleanup here. Return NULL_TREE if no
13574 cleanup need be done. */
13577 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
13583 /* Assume no cleanup is required. */
13584 cleanup
= NULL_TREE
;
13586 if (error_operand_p (decl
))
13589 /* Handle "__attribute__((cleanup))". We run the cleanup function
13590 before the destructor since the destructor is what actually
13591 terminates the lifetime of the object. */
13592 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
13599 /* Get the name specified by the user for the cleanup function. */
13600 id
= TREE_VALUE (TREE_VALUE (attr
));
13601 /* Look up the name to find the cleanup function to call. It is
13602 important to use lookup_name here because that is what is
13603 used in c-common.c:handle_cleanup_attribute when performing
13604 initial checks on the attribute. Note that those checks
13605 include ensuring that the function found is not an overloaded
13606 function, or an object with an overloaded call operator,
13607 etc.; we can rely on the fact that the function found is an
13608 ordinary FUNCTION_DECL. */
13609 fn
= lookup_name (id
);
13610 arg
= build_address (decl
);
13612 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
13613 if (cleanup
== error_mark_node
)
13614 return error_mark_node
;
13616 /* Handle ordinary C++ destructors. */
13617 type
= TREE_TYPE (decl
);
13618 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
13620 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
13621 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
13622 && CLASSTYPE_VBASECLASSES (type
));
13626 if (TREE_CODE (type
) == ARRAY_TYPE
)
13629 addr
= build_address (decl
);
13631 /* Optimize for space over speed here. */
13632 if (!has_vbases
|| flag_expensive_optimizations
)
13633 flags
|= LOOKUP_NONVIRTUAL
;
13635 call
= build_delete (TREE_TYPE (addr
), addr
,
13636 sfk_complete_destructor
, flags
, 0, complain
);
13637 if (call
== error_mark_node
)
13638 cleanup
= error_mark_node
;
13640 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
13648 /* When a stmt has been parsed, this function is called. */
13655 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13656 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13657 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13660 static_fn_type (tree memfntype
)
13665 if (TYPE_PTRMEMFUNC_P (memfntype
))
13666 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13667 if (POINTER_TYPE_P (memfntype
)
13668 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13669 memfntype
= TREE_TYPE (memfntype
);
13670 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13672 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13673 args
= TYPE_ARG_TYPES (memfntype
);
13674 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13675 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13676 fntype
= (cp_build_type_attribute_variant
13677 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13678 fntype
= (build_exception_variant
13679 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13683 /* DECL was originally constructed as a non-static member function,
13684 but turned out to be static. Update it accordingly. */
13687 revert_static_member_fn (tree decl
)
13689 tree stype
= static_fn_type (decl
);
13690 cp_cv_quals quals
= type_memfn_quals (stype
);
13692 if (quals
!= TYPE_UNQUALIFIED
)
13693 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
13695 TREE_TYPE (decl
) = stype
;
13697 if (DECL_ARGUMENTS (decl
))
13698 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
13699 DECL_STATIC_FUNCTION_P (decl
) = 1;
13702 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13703 one of the language-independent trees. */
13705 enum cp_tree_node_structure_enum
13706 cp_tree_node_structure (union lang_tree_node
* t
)
13708 switch (TREE_CODE (&t
->generic
))
13710 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13711 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
13712 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13713 case OVERLOAD
: return TS_CP_OVERLOAD
;
13714 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13715 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13716 case BASELINK
: return TS_CP_BASELINK
;
13717 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13718 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13719 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13720 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13721 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13722 default: return TS_CP_GENERIC
;
13726 /* Build the void_list_node (void_type_node having been created). */
13728 build_void_list_node (void)
13730 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13735 cp_missing_noreturn_ok_p (tree decl
)
13737 /* A missing noreturn is ok for the `main' function. */
13738 return DECL_MAIN_P (decl
);
13741 /* Return the COMDAT group into which DECL should be placed. */
13744 cxx_comdat_group (tree decl
)
13748 /* Virtual tables, construction virtual tables, and virtual table
13749 tables all go in a single COMDAT group, named after the primary
13751 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13752 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
13753 /* For all other DECLs, the COMDAT group is the mangled name of the
13754 declaration itself. */
13757 while (DECL_THUNK_P (decl
))
13759 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13760 into the same section as the target function. In that case
13761 we must return target's name. */
13762 tree target
= THUNK_TARGET (decl
);
13763 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
13764 && DECL_SECTION_NAME (target
) != NULL
13765 && DECL_ONE_ONLY (target
))
13770 name
= DECL_ASSEMBLER_NAME (decl
);
13776 #include "gt-cp-decl.h"