1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2013 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
36 #include "tree-iterator.h"
37 #include "tree-inline.h"
44 #include "c-family/c-common.h"
45 #include "c-family/c-objc.h"
46 #include "c-family/c-pragma.h"
47 #include "diagnostic.h"
51 #include "pointer-set.h"
52 #include "splay-tree.h"
56 /* Possible cases of bad specifiers type used by bad_specifiers. */
58 BSP_VAR
, /* variable */
59 BSP_PARM
, /* parameter */
64 static tree
grokparms (tree parmlist
, tree
*);
65 static const char *redeclaration_error_message (tree
, tree
);
67 static int decl_jump_unsafe (tree
);
68 static void require_complete_types_for_parms (tree
);
69 static int ambi_op_p (enum tree_code
);
70 static int unary_op_p (enum tree_code
);
71 static void push_local_name (tree
);
72 static tree
grok_reference_init (tree
, tree
, tree
, int);
73 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
75 static int check_static_variable_definition (tree
, tree
);
76 static void record_unknown_type (tree
, const char *);
77 static tree
builtin_function_1 (tree
, tree
, bool);
78 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
79 static int member_function_or_else (tree
, tree
, enum overload_flags
);
80 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
82 static void check_for_uninitialized_const_var (tree
);
83 static hashval_t
typename_hash (const void *);
84 static int typename_compare (const void *, const void *);
85 static tree
local_variable_p_walkfn (tree
*, int *, void *);
86 static tree
record_builtin_java_type (const char *, int);
87 static const char *tag_name (enum tag_types
);
88 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
89 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
90 static void maybe_deduce_size_from_array_init (tree
, tree
);
91 static void layout_var_decl (tree
);
92 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
93 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
94 static void save_function_data (tree
);
95 static void copy_type_enum (tree
, tree
);
96 static void check_function_type (tree
, tree
);
97 static void finish_constructor_body (void);
98 static void begin_destructor_body (void);
99 static void finish_destructor_body (void);
100 static void record_key_method_defined (tree
);
101 static tree
create_array_type_for_decl (tree
, tree
, tree
);
102 static tree
get_atexit_node (void);
103 static tree
get_dso_handle_node (void);
104 static tree
start_cleanup_fn (void);
105 static void end_cleanup_fn (void);
106 static tree
cp_make_fname_decl (location_t
, tree
, int);
107 static void initialize_predefined_identifiers (void);
108 static tree check_special_function_return_type
109 (special_function_kind
, tree
, tree
);
110 static tree
push_cp_library_fn (enum tree_code
, tree
);
111 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
112 static void store_parm_decls (tree
);
113 static void initialize_local_var (tree
, tree
);
114 static void expand_static_init (tree
, tree
);
116 /* The following symbols are subsumed in the cp_global_trees array, and
117 listed here individually for documentation purposes.
120 tree wchar_decl_node;
122 tree vtable_entry_type;
123 tree delta_type_node;
124 tree __t_desc_type_node;
126 tree class_type_node;
127 tree unknown_type_node;
129 Array type `vtable_entry_type[]'
132 tree vtbl_ptr_type_node;
139 A FUNCTION_DECL which can call `abort'. Not necessarily the
140 one that the user will declare, but sufficient to be called
141 by routines that want to abort the program.
145 The FUNCTION_DECL for the default `::operator delete'.
147 tree global_delete_fndecl;
150 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
151 tree tinfo_var_id; */
153 tree cp_global_trees
[CPTI_MAX
];
155 /* Indicates that there is a type value in some namespace, although
156 that is not necessarily in scope at the moment. */
158 tree global_type_node
;
160 /* The node that holds the "name" of the global scope. */
161 tree global_scope_name
;
163 #define local_names cp_function_chain->x_local_names
165 /* A list of objects which have constructors or destructors
166 which reside in the global scope. The decl is stored in
167 the TREE_VALUE slot and the initializer is stored
168 in the TREE_PURPOSE slot. */
169 tree static_aggregates
;
171 /* Like static_aggregates, but for thread_local variables. */
176 /* A node for the integer constant 2. */
178 tree integer_two_node
;
180 /* Used only for jumps to as-yet undefined labels, since jumps to
181 defined labels can have their validity checked immediately. */
183 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
184 struct named_label_use_entry
*next
;
185 /* The binding level to which this entry is *currently* attached.
186 This is initially the binding level in which the goto appeared,
187 but is modified as scopes are closed. */
188 cp_binding_level
*binding_level
;
189 /* The head of the names list that was current when the goto appeared,
190 or the inner scope popped. These are the decls that will *not* be
191 skipped when jumping to the label. */
193 /* The location of the goto, for error reporting. */
194 location_t o_goto_locus
;
195 /* True if an OpenMP structured block scope has been closed since
196 the goto appeared. This means that the branch from the label will
197 illegally exit an OpenMP scope. */
201 /* A list of all LABEL_DECLs in the function that have names. Here so
202 we can clear out their names' definitions at the end of the
203 function, and so we can check the validity of jumps to these labels. */
205 struct GTY(()) named_label_entry
{
206 /* The decl itself. */
209 /* The binding level to which the label is *currently* attached.
210 This is initially set to the binding level in which the label
211 is defined, but is modified as scopes are closed. */
212 cp_binding_level
*binding_level
;
213 /* The head of the names list that was current when the label was
214 defined, or the inner scope popped. These are the decls that will
215 be skipped when jumping to the label. */
217 /* A vector of all decls from all binding levels that would be
218 crossed by a backward branch to the label. */
219 vec
<tree
, va_gc
> *bad_decls
;
221 /* A list of uses of the label, before the label is defined. */
222 struct named_label_use_entry
*uses
;
224 /* The following bits are set after the label is defined, and are
225 updated as scopes are popped. They indicate that a backward jump
226 to the label will illegally enter a scope of the given flavor. */
232 #define named_labels cp_function_chain->x_named_labels
234 /* The number of function bodies which we are currently processing.
235 (Zero if we are at namespace scope, one inside the body of a
236 function, two inside the body of a function in a local class, etc.) */
239 /* To avoid unwanted recursion, finish_function defers all mark_used calls
240 encountered during its execution until it finishes. */
241 bool defer_mark_used_calls
;
242 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
244 /* States indicating how grokdeclarator() should handle declspecs marked
245 with __attribute__((deprecated)). An object declared as
246 __attribute__((deprecated)) suppresses warnings of uses of other
248 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
251 /* A list of VAR_DECLs whose type was incomplete at the time the
252 variable was declared. */
254 typedef struct GTY(()) incomplete_var_d
{
256 tree incomplete_type
;
260 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
262 /* Returns the kind of template specialization we are currently
263 processing, given that it's declaration contained N_CLASS_SCOPES
264 explicit scope qualifications. */
267 current_tmpl_spec_kind (int n_class_scopes
)
269 int n_template_parm_scopes
= 0;
270 int seen_specialization_p
= 0;
271 int innermost_specialization_p
= 0;
274 /* Scan through the template parameter scopes. */
275 for (b
= current_binding_level
;
276 b
->kind
== sk_template_parms
;
279 /* If we see a specialization scope inside a parameter scope,
280 then something is wrong. That corresponds to a declaration
283 template <class T> template <> ...
285 which is always invalid since [temp.expl.spec] forbids the
286 specialization of a class member template if the enclosing
287 class templates are not explicitly specialized as well. */
288 if (b
->explicit_spec_p
)
290 if (n_template_parm_scopes
== 0)
291 innermost_specialization_p
= 1;
293 seen_specialization_p
= 1;
295 else if (seen_specialization_p
== 1)
296 return tsk_invalid_member_spec
;
298 ++n_template_parm_scopes
;
301 /* Handle explicit instantiations. */
302 if (processing_explicit_instantiation
)
304 if (n_template_parm_scopes
!= 0)
305 /* We've seen a template parameter list during an explicit
306 instantiation. For example:
308 template <class T> template void f(int);
310 This is erroneous. */
311 return tsk_invalid_expl_inst
;
313 return tsk_expl_inst
;
316 if (n_template_parm_scopes
< n_class_scopes
)
317 /* We've not seen enough template headers to match all the
318 specialized classes present. For example:
320 template <class T> void R<T>::S<T>::f(int);
322 This is invalid; there needs to be one set of template
323 parameters for each class. */
324 return tsk_insufficient_parms
;
325 else if (n_template_parm_scopes
== n_class_scopes
)
326 /* We're processing a non-template declaration (even though it may
327 be a member of a template class.) For example:
329 template <class T> void S<T>::f(int);
331 The `class T' matches the `S<T>', leaving no template headers
332 corresponding to the `f'. */
334 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
335 /* We've got too many template headers. For example:
337 template <> template <class T> void f (T);
339 There need to be more enclosing classes. */
340 return tsk_excessive_parms
;
342 /* This must be a template. It's of the form:
344 template <class T> template <class U> void S<T>::f(U);
346 This is a specialization if the innermost level was a
347 specialization; otherwise it's just a definition of the
349 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
352 /* Exit the current scope. */
360 /* When a label goes out of scope, check to see if that label was used
361 in a valid manner, and issue any appropriate warnings or errors. */
364 pop_label (tree label
, tree old_value
)
366 if (!processing_template_decl
)
368 if (DECL_INITIAL (label
) == NULL_TREE
)
372 error ("label %q+D used but not defined", label
);
373 location
= input_location
; /* FIXME want (input_filename, (line)0) */
374 /* Avoid crashing later. */
375 define_label (location
, DECL_NAME (label
));
378 warn_for_unused_label (label
);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels_1 (void **slot
, void *data
)
391 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
392 tree block
= (tree
) data
;
394 pop_label (ent
->label_decl
, NULL_TREE
);
396 /* Put the labels into the "variables" of the top-level block,
397 so debugger can see them. */
398 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
399 BLOCK_VARS (block
) = ent
->label_decl
;
401 htab_clear_slot (named_labels
, slot
);
407 pop_labels (tree block
)
411 htab_traverse (named_labels
, pop_labels_1
, block
);
416 /* At the end of a block with local labels, restore the outer definition. */
419 pop_local_label (tree label
, tree old_value
)
421 struct named_label_entry dummy
;
424 pop_label (label
, old_value
);
426 dummy
.label_decl
= label
;
427 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
428 htab_clear_slot (named_labels
, slot
);
431 /* The following two routines are used to interface to Objective-C++.
432 The binding level is purposely treated as an opaque type. */
435 objc_get_current_scope (void)
437 return current_binding_level
;
440 /* The following routine is used by the NeXT-style SJLJ exceptions;
441 variables get marked 'volatile' so as to not be clobbered by
442 _setjmp()/_longjmp() calls. All variables in the current scope,
443 as well as parent scopes up to (but not including) ENCLOSING_BLK
444 shall be thusly marked. */
447 objc_mark_locals_volatile (void *enclosing_blk
)
449 cp_binding_level
*scope
;
451 for (scope
= current_binding_level
;
452 scope
&& scope
!= enclosing_blk
;
453 scope
= scope
->level_chain
)
457 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
458 objc_volatilize_decl (decl
);
460 /* Do not climb up past the current function. */
461 if (scope
->kind
== sk_function_parms
)
466 /* Update data for defined and undefined labels when leaving a scope. */
469 poplevel_named_label_1 (void **slot
, void *data
)
471 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
472 cp_binding_level
*bl
= (cp_binding_level
*) data
;
473 cp_binding_level
*obl
= bl
->level_chain
;
475 if (ent
->binding_level
== bl
)
479 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
480 TREE_LISTs representing OVERLOADs, so be careful. */
481 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
483 : TREE_CHAIN (decl
)))
484 if (decl_jump_unsafe (decl
))
485 vec_safe_push (ent
->bad_decls
, decl
);
487 ent
->binding_level
= obl
;
488 ent
->names_in_scope
= obl
->names
;
492 ent
->in_try_scope
= true;
495 ent
->in_catch_scope
= true;
498 ent
->in_omp_scope
= true;
506 struct named_label_use_entry
*use
;
508 for (use
= ent
->uses
; use
; use
= use
->next
)
509 if (use
->binding_level
== bl
)
511 use
->binding_level
= obl
;
512 use
->names_in_scope
= obl
->names
;
513 if (bl
->kind
== sk_omp
)
514 use
->in_omp_scope
= true;
521 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
522 when errors were reported, except for -Werror-unused-but-set-*. */
523 static int unused_but_set_errorcount
;
525 /* Exit a binding level.
526 Pop the level off, and restore the state of the identifier-decl mappings
527 that were in effect when this level was entered.
529 If KEEP == 1, this level had explicit declarations, so
530 and create a "block" (a BLOCK node) for the level
531 to record its declarations and subblocks for symbol table output.
533 If FUNCTIONBODY is nonzero, this level is the body of a function,
534 so create a block as if KEEP were set and also clear out all
537 If REVERSE is nonzero, reverse the order of decls before putting
538 them into the BLOCK. */
541 poplevel (int keep
, int reverse
, int functionbody
)
544 /* The chain of decls was accumulated in reverse order.
545 Put it into forward order, just for cleanliness. */
550 int leaving_for_scope
;
553 cp_label_binding
*label_bind
;
555 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
560 gcc_assert (current_binding_level
->kind
!= sk_class
);
562 if (current_binding_level
->kind
== sk_cleanup
)
564 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
566 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
568 /* We used to use KEEP == 2 to indicate that the new block should go
569 at the beginning of the list of blocks at this binding level,
570 rather than the end. This hack is no longer used. */
571 gcc_assert (keep
== 0 || keep
== 1);
573 if (current_binding_level
->keep
)
576 /* Any uses of undefined labels, and any defined labels, now operate
577 under constraints of next binding contour. */
578 if (cfun
&& !functionbody
&& named_labels
)
579 htab_traverse (named_labels
, poplevel_named_label_1
,
580 current_binding_level
);
582 /* Get the decls in the order they were written.
583 Usually current_binding_level->names is in reverse order.
584 But parameter decls were previously put in forward order. */
587 current_binding_level
->names
588 = decls
= nreverse (current_binding_level
->names
);
590 decls
= current_binding_level
->names
;
592 /* If there were any declarations or structure tags in that level,
593 or if this level is a function body,
594 create a BLOCK to record them for the life of this function. */
596 if (keep
== 1 || functionbody
)
597 block
= make_node (BLOCK
);
598 if (block
!= NULL_TREE
)
600 BLOCK_VARS (block
) = decls
;
601 BLOCK_SUBBLOCKS (block
) = subblocks
;
604 /* In each subblock, record that this is its superior. */
606 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
607 BLOCK_SUPERCONTEXT (link
) = block
;
609 /* We still support the old for-scope rules, whereby the variables
610 in a for-init statement were in scope after the for-statement
611 ended. We only use the new rules if flag_new_for_scope is
614 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
616 /* Before we remove the declarations first check for unused variables. */
617 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
618 && !processing_template_decl
)
619 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
621 /* There are cases where D itself is a TREE_LIST. See in
622 push_local_binding where the list of decls returned by
623 getdecls is built. */
624 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
625 // See through references for improved -Wunused-variable (PR 38958).
626 tree type
= non_reference (TREE_TYPE (decl
));
628 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
629 && ! DECL_IN_SYSTEM_HEADER (decl
)
630 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
631 && type
!= error_mark_node
632 && (!CLASS_TYPE_P (type
)
633 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)))
635 if (! TREE_USED (decl
))
636 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
637 else if (DECL_CONTEXT (decl
) == current_function_decl
638 // For -Wunused-but-set-variable leave references alone.
639 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
640 && errorcount
== unused_but_set_errorcount
)
642 warning (OPT_Wunused_but_set_variable
,
643 "variable %q+D set but not used", decl
);
644 unused_but_set_errorcount
= errorcount
;
649 /* Remove declarations for all the DECLs in this level. */
650 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
652 if (leaving_for_scope
&& VAR_P (link
)
653 /* It's hard to make this ARM compatibility hack play nicely with
654 lambdas, and it really isn't necessary in C++11 mode. */
655 && cxx_dialect
< cxx11
658 tree name
= DECL_NAME (link
);
662 ob
= outer_binding (name
,
663 IDENTIFIER_BINDING (name
),
666 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
668 ns_binding
= NULL_TREE
;
670 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
671 /* We have something like:
676 and we are leaving the `for' scope. There's no reason to
677 keep the binding of the inner `i' in this case. */
678 pop_binding (name
, link
);
679 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
680 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
681 /* Here, we have something like:
689 We must pop the for-scope binding so we know what's a
690 type and what isn't. */
691 pop_binding (name
, link
);
694 /* Mark this VAR_DECL as dead so that we can tell we left it
695 there only for backward compatibility. */
696 DECL_DEAD_FOR_LOCAL (link
) = 1;
698 /* Keep track of what should have happened when we
699 popped the binding. */
702 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
703 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
706 /* Add it to the list of dead variables in the next
707 outermost binding to that we can remove these when we
708 leave that binding. */
710 current_binding_level
->level_chain
->dead_vars_from_for
,
713 /* Although we don't pop the cxx_binding, we do clear
714 its SCOPE since the scope is going away now. */
715 IDENTIFIER_BINDING (name
)->scope
716 = current_binding_level
->level_chain
;
723 /* Remove the binding. */
726 if (TREE_CODE (decl
) == TREE_LIST
)
727 decl
= TREE_VALUE (decl
);
730 if (TREE_CODE (name
) == OVERLOAD
)
731 name
= OVL_FUNCTION (name
);
733 gcc_assert (DECL_P (name
));
734 pop_binding (DECL_NAME (name
), decl
);
738 /* Remove declarations for any `for' variables from inner scopes
739 that we kept around. */
740 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
742 pop_binding (DECL_NAME (decl
), decl
);
744 /* Restore the IDENTIFIER_TYPE_VALUEs. */
745 for (link
= current_binding_level
->type_shadowed
;
746 link
; link
= TREE_CHAIN (link
))
747 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
749 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
750 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
752 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
754 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
755 list if a `using' declaration put them there. The debugging
756 back ends won't understand OVERLOAD, so we remove them here.
757 Because the BLOCK_VARS are (temporarily) shared with
758 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
759 popped all the bindings. */
764 for (d
= &BLOCK_VARS (block
); *d
; )
766 if (TREE_CODE (*d
) == TREE_LIST
)
767 *d
= TREE_CHAIN (*d
);
769 d
= &DECL_CHAIN (*d
);
773 /* If the level being exited is the top level of a function,
774 check over all the labels. */
777 /* Since this is the top level block of a function, the vars are
778 the function's parameters. Don't leave them in the BLOCK
779 because they are found in the FUNCTION_DECL instead. */
780 BLOCK_VARS (block
) = 0;
784 kind
= current_binding_level
->kind
;
785 if (kind
== sk_cleanup
)
789 /* If this is a temporary binding created for a cleanup, then we'll
790 have pushed a statement list level. Pop that, create a new
791 BIND_EXPR for the block, and insert it into the stream. */
792 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
793 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
800 /* The current function is being defined, so its DECL_INITIAL
801 should be error_mark_node. */
802 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
803 DECL_INITIAL (current_function_decl
) = block
;
806 current_binding_level
->blocks
807 = block_chainon (current_binding_level
->blocks
, block
);
809 /* If we did not make a block for the level just exited,
810 any blocks made for inner levels
811 (since they cannot be recorded as subblocks in that level)
812 must be carried forward so they will later become subblocks
813 of something else. */
815 current_binding_level
->blocks
816 = block_chainon (current_binding_level
->blocks
, subblocks
);
818 /* Each and every BLOCK node created here in `poplevel' is important
819 (e.g. for proper debugging information) so if we created one
820 earlier, mark it as "used". */
822 TREE_USED (block
) = 1;
824 /* All temporary bindings created for cleanups are popped silently. */
825 if (kind
== sk_cleanup
)
828 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
832 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
833 itself, calling F for each. The DATA is passed to F as well. */
836 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
839 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
841 result
|= (*f
) (name_space
, data
);
843 for (; current
; current
= DECL_CHAIN (current
))
844 result
|= walk_namespaces_r (current
, f
, data
);
849 /* Walk all the namespaces, calling F for each. The DATA is passed to
853 walk_namespaces (walk_namespaces_fn f
, void* data
)
855 return walk_namespaces_r (global_namespace
, f
, data
);
858 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
859 DATA is non-NULL, this is the last time we will call
860 wrapup_global_declarations for this NAMESPACE. */
863 wrapup_globals_for_namespace (tree name_space
, void* data
)
865 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
866 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
867 tree
*vec
= statics
->address ();
868 int len
= statics
->length ();
869 int last_time
= (data
!= 0);
873 check_global_declarations (vec
, len
);
874 emit_debug_global_declarations (vec
, len
);
878 /* Write out any globals that need to be output. */
879 return wrapup_global_declarations (vec
, len
);
883 /* In C++, you don't have to write `struct S' to refer to `S'; you
884 can just use `S'. We accomplish this by creating a TYPE_DECL as
885 if the user had written `typedef struct S S'. Create and return
886 the TYPE_DECL for TYPE. */
889 create_implicit_typedef (tree name
, tree type
)
893 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
894 DECL_ARTIFICIAL (decl
) = 1;
895 /* There are other implicit type declarations, like the one *within*
896 a class that allows you to write `S::S'. We must distinguish
898 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
899 TYPE_NAME (type
) = decl
;
900 TYPE_STUB_DECL (type
) = decl
;
905 /* Remember a local name for name-mangling purposes. */
908 push_local_name (tree decl
)
913 timevar_start (TV_NAME_LOOKUP
);
915 name
= DECL_NAME (decl
);
917 nelts
= vec_safe_length (local_names
);
918 for (i
= 0; i
< nelts
; i
++)
920 t
= (*local_names
)[i
];
921 if (DECL_NAME (t
) == name
)
923 if (!DECL_LANG_SPECIFIC (decl
))
924 retrofit_lang_decl (decl
);
925 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
926 if (DECL_DISCRIMINATOR_SET_P (t
))
927 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
929 DECL_DISCRIMINATOR (decl
) = 1;
931 (*local_names
)[i
] = decl
;
932 timevar_stop (TV_NAME_LOOKUP
);
937 vec_safe_push (local_names
, decl
);
938 timevar_stop (TV_NAME_LOOKUP
);
941 /* Subroutine of duplicate_decls: return truthvalue of whether
942 or not types of these decls match.
944 For C++, we must compare the parameter list so that `int' can match
945 `int&' in a parameter position, but `int&' is not confused with
949 decls_match (tree newdecl
, tree olddecl
)
953 if (newdecl
== olddecl
)
956 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
957 /* If the two DECLs are not even the same kind of thing, we're not
958 interested in their types. */
961 gcc_assert (DECL_P (newdecl
));
963 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
965 tree f1
= TREE_TYPE (newdecl
);
966 tree f2
= TREE_TYPE (olddecl
);
967 tree p1
= TYPE_ARG_TYPES (f1
);
968 tree p2
= TYPE_ARG_TYPES (f2
);
971 /* Specializations of different templates are different functions
972 even if they have the same type. */
973 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
974 ? DECL_TI_TEMPLATE (newdecl
)
976 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
977 ? DECL_TI_TEMPLATE (olddecl
)
982 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
983 && ! (DECL_EXTERN_C_P (newdecl
)
984 && DECL_EXTERN_C_P (olddecl
)))
987 /* A new declaration doesn't match a built-in one unless it
988 is also extern "C". */
989 if (DECL_IS_BUILTIN (olddecl
)
990 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
993 if (TREE_CODE (f1
) != TREE_CODE (f2
))
996 /* A declaration with deduced return type should use its pre-deduction
997 type for declaration matching. */
998 r2
= fndecl_declared_return_type (olddecl
);
1000 if (same_type_p (TREE_TYPE (f1
), r2
))
1002 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1003 && (DECL_BUILT_IN (olddecl
)
1004 #ifndef NO_IMPLICIT_EXTERN_C
1005 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1006 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1010 types_match
= self_promoting_args_p (p1
);
1011 if (p1
== void_list_node
)
1012 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1014 #ifndef NO_IMPLICIT_EXTERN_C
1015 else if (!prototype_p (f1
)
1016 && (DECL_EXTERN_C_P (olddecl
)
1017 && DECL_IN_SYSTEM_HEADER (olddecl
)
1018 && !DECL_CLASS_SCOPE_P (olddecl
))
1019 && (DECL_EXTERN_C_P (newdecl
)
1020 && DECL_IN_SYSTEM_HEADER (newdecl
)
1021 && !DECL_CLASS_SCOPE_P (newdecl
)))
1023 types_match
= self_promoting_args_p (p2
);
1024 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1030 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1031 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1032 || comp_type_attributes (TREE_TYPE (newdecl
),
1033 TREE_TYPE (olddecl
)) != 0);
1038 /* The decls dont match if they correspond to two different versions
1039 of the same function. Disallow extern "C" functions to be
1040 versions for now. */
1042 && !DECL_EXTERN_C_P (newdecl
)
1043 && !DECL_EXTERN_C_P (olddecl
)
1044 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1046 /* Mark functions as versions if necessary. Modify the mangled decl
1047 name if necessary. */
1048 if (DECL_FUNCTION_VERSIONED (newdecl
)
1049 && DECL_FUNCTION_VERSIONED (olddecl
))
1051 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1053 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1054 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1055 mangle_decl (newdecl
);
1057 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1059 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1060 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1061 mangle_decl (olddecl
);
1063 record_function_versions (olddecl
, newdecl
);
1067 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1069 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1070 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1073 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1074 DECL_TEMPLATE_PARMS (olddecl
)))
1077 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1078 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1079 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1081 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1082 DECL_TEMPLATE_RESULT (newdecl
));
1086 /* Need to check scope for variable declaration (VAR_DECL).
1087 For typedef (TYPE_DECL), scope is ignored. */
1089 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1091 Two declarations for an object with C language linkage
1092 with the same name (ignoring the namespace that qualify
1093 it) that appear in different namespace scopes refer to
1095 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1098 if (TREE_TYPE (newdecl
) == error_mark_node
)
1099 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1100 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1101 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1102 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1105 types_match
= comptypes (TREE_TYPE (newdecl
),
1106 TREE_TYPE (olddecl
),
1107 COMPARE_REDECLARATION
);
1113 /* If NEWDECL is `static' and an `extern' was seen previously,
1114 warn about it. OLDDECL is the previous declaration.
1116 Note that this does not apply to the C++ case of declaring
1117 a variable `extern const' and then later `const'.
1119 Don't complain about built-in functions, since they are beyond
1120 the user's control. */
1123 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1125 if (TREE_CODE (newdecl
) == TYPE_DECL
1126 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1127 || TREE_CODE (newdecl
) == CONST_DECL
1128 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1131 /* Don't get confused by static member functions; that's a different
1133 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1134 && DECL_STATIC_FUNCTION_P (newdecl
))
1137 /* If the old declaration was `static', or the new one isn't, then
1138 everything is OK. */
1139 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1142 /* It's OK to declare a builtin function as `static'. */
1143 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1144 && DECL_ARTIFICIAL (olddecl
))
1147 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1148 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1151 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1152 function templates. If their exception specifications do not
1153 match, issue a diagnostic. */
1156 check_redeclaration_exception_specification (tree new_decl
,
1161 tree new_exceptions
;
1162 tree old_exceptions
;
1164 new_type
= TREE_TYPE (new_decl
);
1165 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1166 old_type
= TREE_TYPE (old_decl
);
1167 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1171 If any declaration of a function has an exception-specification,
1172 all declarations, including the definition and an explicit
1173 specialization, of that function shall have an
1174 exception-specification with the same set of type-ids. */
1175 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1176 && ! DECL_IS_BUILTIN (old_decl
)
1178 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1180 error ("declaration of %qF has a different exception specifier",
1182 error ("from previous declaration %q+F", old_decl
);
1186 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1187 Otherwise issue diagnostics. */
1190 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1192 old_decl
= STRIP_TEMPLATE (old_decl
);
1193 new_decl
= STRIP_TEMPLATE (new_decl
);
1194 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1195 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1197 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1198 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1200 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1202 if (DECL_BUILT_IN (old_decl
))
1204 /* Hide a built-in declaration. */
1205 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1206 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1209 /* 7.1.5 [dcl.constexpr]
1210 Note: An explicit specialization can differ from the template
1211 declaration with respect to the constexpr specifier. */
1212 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1213 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1216 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1217 error ("from previous declaration %q+D", old_decl
);
1221 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1222 && lookup_attribute ("gnu_inline", \
1223 DECL_ATTRIBUTES (fn)))
1225 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1226 If the redeclaration is invalid, a diagnostic is issued, and the
1227 error_mark_node is returned. Otherwise, OLDDECL is returned.
1229 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1232 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1235 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1237 unsigned olddecl_uid
= DECL_UID (olddecl
);
1238 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1239 int new_defines_function
= 0;
1240 tree new_template_info
;
1242 if (newdecl
== olddecl
)
1245 types_match
= decls_match (newdecl
, olddecl
);
1247 /* If either the type of the new decl or the type of the old decl is an
1248 error_mark_node, then that implies that we have already issued an
1249 error (earlier) for some bogus type specification, and in that case,
1250 it is rather pointless to harass the user with yet more error message
1251 about the same declaration, so just pretend the types match here. */
1252 if (TREE_TYPE (newdecl
) == error_mark_node
1253 || TREE_TYPE (olddecl
) == error_mark_node
)
1254 return error_mark_node
;
1256 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1257 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1259 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1260 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1261 && check_raw_literal_operator (olddecl
))
1262 error ("literal operator template %q+D conflicts with"
1263 " raw literal operator %qD", newdecl
, olddecl
);
1264 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1265 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1266 && check_raw_literal_operator (newdecl
))
1267 error ("raw literal operator %q+D conflicts with"
1268 " literal operator template %qD", newdecl
, olddecl
);
1271 if (DECL_P (olddecl
)
1272 && TREE_CODE (newdecl
) == FUNCTION_DECL
1273 && TREE_CODE (olddecl
) == FUNCTION_DECL
1274 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1276 if (DECL_DECLARED_INLINE_P (newdecl
)
1277 && DECL_UNINLINABLE (newdecl
)
1278 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1279 /* Already warned elsewhere. */;
1280 else if (DECL_DECLARED_INLINE_P (olddecl
)
1281 && DECL_UNINLINABLE (olddecl
)
1282 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1283 /* Already warned. */;
1284 else if (DECL_DECLARED_INLINE_P (newdecl
)
1285 && DECL_UNINLINABLE (olddecl
)
1286 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1288 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1290 warning (OPT_Wattributes
, "previous declaration of %q+D "
1291 "with attribute noinline", olddecl
);
1293 else if (DECL_DECLARED_INLINE_P (olddecl
)
1294 && DECL_UNINLINABLE (newdecl
)
1295 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1297 warning (OPT_Wattributes
, "function %q+D redeclared with "
1298 "attribute noinline", newdecl
);
1299 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1304 /* Check for redeclaration and other discrepancies. */
1305 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1306 && DECL_ARTIFICIAL (olddecl
))
1308 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1309 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1311 /* Avoid warnings redeclaring built-ins which have not been
1312 explicitly declared. */
1313 if (DECL_ANTICIPATED (olddecl
))
1316 /* If you declare a built-in or predefined function name as static,
1317 the old definition is overridden, but optionally warn this was a
1318 bad choice of name. */
1319 if (! TREE_PUBLIC (newdecl
))
1321 warning (OPT_Wshadow
,
1322 DECL_BUILT_IN (olddecl
)
1323 ? G_("shadowing built-in function %q#D")
1324 : G_("shadowing library function %q#D"), olddecl
);
1325 /* Discard the old built-in function. */
1328 /* If the built-in is not ansi, then programs can override
1329 it even globally without an error. */
1330 else if (! DECL_BUILT_IN (olddecl
))
1331 warning (0, "library function %q#D redeclared as non-function %q#D",
1335 error ("declaration of %q#D", newdecl
);
1336 error ("conflicts with built-in declaration %q#D",
1341 else if (!types_match
)
1343 /* Avoid warnings redeclaring built-ins which have not been
1344 explicitly declared. */
1345 if (DECL_ANTICIPATED (olddecl
))
1347 /* Deal with fileptr_type_node. FILE type is not known
1348 at the time we create the builtins. */
1351 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1352 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1354 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1357 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1359 tree t
= TREE_VALUE (t1
);
1362 && TYPE_NAME (TREE_TYPE (t
))
1363 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1364 == get_identifier ("FILE")
1365 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1367 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1369 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1370 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1371 types_match
= decls_match (newdecl
, olddecl
);
1373 return duplicate_decls (newdecl
, olddecl
,
1375 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1378 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1381 else if ((DECL_EXTERN_C_P (newdecl
)
1382 && DECL_EXTERN_C_P (olddecl
))
1383 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1384 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1386 /* A near match; override the builtin. */
1388 if (TREE_PUBLIC (newdecl
))
1390 warning (0, "new declaration %q#D", newdecl
);
1391 warning (0, "ambiguates built-in declaration %q#D",
1395 warning (OPT_Wshadow
,
1396 DECL_BUILT_IN (olddecl
)
1397 ? G_("shadowing built-in function %q#D")
1398 : G_("shadowing library function %q#D"), olddecl
);
1401 /* Discard the old built-in function. */
1404 /* Replace the old RTL to avoid problems with inlining. */
1405 COPY_DECL_RTL (newdecl
, olddecl
);
1407 /* Even if the types match, prefer the new declarations type for
1408 built-ins which have not been explicitly declared, for
1409 exception lists, etc... */
1410 else if (DECL_IS_BUILTIN (olddecl
))
1412 tree type
= TREE_TYPE (newdecl
);
1413 tree attribs
= (*targetm
.merge_type_attributes
)
1414 (TREE_TYPE (olddecl
), type
);
1416 type
= cp_build_type_attribute_variant (type
, attribs
);
1417 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1420 /* If a function is explicitly declared "throw ()", propagate that to
1421 the corresponding builtin. */
1422 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1423 && DECL_ANTICIPATED (olddecl
)
1424 && TREE_NOTHROW (newdecl
)
1425 && !TREE_NOTHROW (olddecl
))
1427 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1428 tree tmpdecl
= builtin_decl_explicit (fncode
);
1429 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1430 TREE_NOTHROW (tmpdecl
) = 1;
1433 /* Whether or not the builtin can throw exceptions has no
1434 bearing on this declarator. */
1435 TREE_NOTHROW (olddecl
) = 0;
1437 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1439 /* If a builtin function is redeclared as `static', merge
1440 the declarations, but make the original one static. */
1441 DECL_THIS_STATIC (olddecl
) = 1;
1442 TREE_PUBLIC (olddecl
) = 0;
1444 /* Make the old declaration consistent with the new one so
1445 that all remnants of the builtin-ness of this function
1446 will be banished. */
1447 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1448 COPY_DECL_RTL (newdecl
, olddecl
);
1451 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1453 /* C++ Standard, 3.3, clause 4:
1454 "[Note: a namespace name or a class template name must be unique
1455 in its declarative region (7.3.2, clause 14). ]" */
1456 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1457 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1458 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1459 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1460 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1461 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1463 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1464 && TREE_CODE (newdecl
) != TYPE_DECL
)
1465 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1466 && TREE_CODE (olddecl
) != TYPE_DECL
))
1468 /* We do nothing special here, because C++ does such nasty
1469 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1470 get shadowed, and know that if we need to find a TYPE_DECL
1471 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1472 slot of the identifier. */
1476 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1477 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1478 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1479 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1483 error ("%q#D redeclared as different kind of symbol", newdecl
);
1484 if (TREE_CODE (olddecl
) == TREE_LIST
)
1485 olddecl
= TREE_VALUE (olddecl
);
1486 error ("previous declaration of %q+#D", olddecl
);
1488 return error_mark_node
;
1490 else if (!types_match
)
1492 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1493 /* These are certainly not duplicate declarations; they're
1494 from different scopes. */
1497 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1499 /* The name of a class template may not be declared to refer to
1500 any other template, class, function, object, namespace, value,
1501 or type in the same scope. */
1502 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1503 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1505 error ("declaration of template %q#D", newdecl
);
1506 error ("conflicts with previous declaration %q+#D", olddecl
);
1507 return error_mark_node
;
1509 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1510 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1511 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1512 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1513 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1514 DECL_TEMPLATE_PARMS (olddecl
))
1515 /* Template functions can be disambiguated by
1517 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1518 TREE_TYPE (TREE_TYPE (olddecl
))))
1520 error ("new declaration %q#D", newdecl
);
1521 error ("ambiguates old declaration %q+#D", olddecl
);
1525 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1527 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1529 error ("declaration of C function %q#D conflicts with",
1531 error ("previous declaration %q+#D here", olddecl
);
1534 /* For function versions, params and types match, but they
1535 are not ambiguous. */
1536 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1537 && !DECL_FUNCTION_VERSIONED (olddecl
))
1538 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1539 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1541 error ("new declaration %q#D", newdecl
);
1542 error ("ambiguates old declaration %q+#D", olddecl
);
1543 return error_mark_node
;
1550 error ("conflicting declaration %q#D", newdecl
);
1551 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1552 return error_mark_node
;
1555 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1556 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1557 && (!DECL_TEMPLATE_INFO (newdecl
)
1558 || (DECL_TI_TEMPLATE (newdecl
)
1559 != DECL_TI_TEMPLATE (olddecl
))))
1560 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1561 && (!DECL_TEMPLATE_INFO (olddecl
)
1562 || (DECL_TI_TEMPLATE (olddecl
)
1563 != DECL_TI_TEMPLATE (newdecl
))))))
1564 /* It's OK to have a template specialization and a non-template
1565 with the same type, or to have specializations of two
1566 different templates with the same type. Note that if one is a
1567 specialization, and the other is an instantiation of the same
1568 template, that we do not exit at this point. That situation
1569 can occur if we instantiate a template class, and then
1570 specialize one of its methods. This situation is valid, but
1571 the declarations must be merged in the usual way. */
1573 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1574 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1575 && !DECL_USE_TEMPLATE (newdecl
))
1576 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1577 && !DECL_USE_TEMPLATE (olddecl
))))
1578 /* One of the declarations is a template instantiation, and the
1579 other is not a template at all. That's OK. */
1581 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1583 /* In [namespace.alias] we have:
1585 In a declarative region, a namespace-alias-definition can be
1586 used to redefine a namespace-alias declared in that declarative
1587 region to refer only to the namespace to which it already
1590 Therefore, if we encounter a second alias directive for the same
1591 alias, we can just ignore the second directive. */
1592 if (DECL_NAMESPACE_ALIAS (newdecl
)
1593 && (DECL_NAMESPACE_ALIAS (newdecl
)
1594 == DECL_NAMESPACE_ALIAS (olddecl
)))
1596 /* [namespace.alias]
1598 A namespace-name or namespace-alias shall not be declared as
1599 the name of any other entity in the same declarative region.
1600 A namespace-name defined at global scope shall not be
1601 declared as the name of any other entity in any global scope
1603 error ("declaration of namespace %qD conflicts with", newdecl
);
1604 error ("previous declaration of namespace %q+D here", olddecl
);
1605 return error_mark_node
;
1609 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1612 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1613 if (DECL_NAME (olddecl
) != NULL_TREE
)
1614 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1615 ? G_("%q+#D previously defined here")
1616 : G_("%q+#D previously declared here"), olddecl
);
1617 return error_mark_node
;
1619 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1620 && DECL_INITIAL (olddecl
) != NULL_TREE
1621 && !prototype_p (TREE_TYPE (olddecl
))
1622 && prototype_p (TREE_TYPE (newdecl
)))
1624 /* Prototype decl follows defn w/o prototype. */
1625 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1626 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1627 "follows non-prototype definition here");
1629 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1630 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1633 If two declarations of the same function or object
1634 specify different linkage-specifications ..., the program
1635 is ill-formed.... Except for functions with C++ linkage,
1636 a function declaration without a linkage specification
1637 shall not precede the first linkage specification for
1638 that function. A function can be declared without a
1639 linkage specification after an explicit linkage
1640 specification has been seen; the linkage explicitly
1641 specified in the earlier declaration is not affected by
1642 such a function declaration.
1644 DR 563 raises the question why the restrictions on
1645 functions should not also apply to objects. Older
1646 versions of G++ silently ignore the linkage-specification
1654 which is clearly wrong. Therefore, we now treat objects
1656 if (current_lang_depth () == 0)
1658 /* There is no explicit linkage-specification, so we use
1659 the linkage from the previous declaration. */
1660 if (!DECL_LANG_SPECIFIC (newdecl
))
1661 retrofit_lang_decl (newdecl
);
1662 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1666 error ("previous declaration of %q+#D with %qL linkage",
1667 olddecl
, DECL_LANGUAGE (olddecl
));
1668 error ("conflicts with new declaration with %qL linkage",
1669 DECL_LANGUAGE (newdecl
));
1673 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1675 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1677 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1678 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1681 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1682 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1684 for (; t1
&& t1
!= void_list_node
;
1685 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1686 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1688 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1691 permerror (input_location
, "default argument given for parameter %d of %q#D",
1693 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1697 error ("default argument given for parameter %d of %q#D",
1699 error ("after previous specification in %q+#D",
1706 /* Do not merge an implicit typedef with an explicit one. In:
1710 typedef class A A __attribute__ ((foo));
1712 the attribute should apply only to the typedef. */
1713 if (TREE_CODE (olddecl
) == TYPE_DECL
1714 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1715 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1718 /* If new decl is `static' and an `extern' was seen previously,
1720 warn_extern_redeclared_static (newdecl
, olddecl
);
1722 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1723 return error_mark_node
;
1725 /* We have committed to returning 1 at this point. */
1726 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1728 /* Now that functions must hold information normally held
1729 by field decls, there is extra work to do so that
1730 declaration information does not get destroyed during
1732 if (DECL_VINDEX (olddecl
))
1733 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1734 if (DECL_CONTEXT (olddecl
))
1735 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1736 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1737 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1738 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1739 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1740 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1741 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1742 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1743 SET_OVERLOADED_OPERATOR_CODE
1744 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1745 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1747 /* Optionally warn about more than one declaration for the same
1748 name, but don't warn about a function declaration followed by a
1750 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1751 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1752 /* Don't warn about extern decl followed by definition. */
1753 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1754 /* Don't warn about friends, let add_friend take care of it. */
1755 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1756 /* Don't warn about declaration followed by specialization. */
1757 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1758 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1760 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1761 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1764 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1765 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1767 if (DECL_DELETED_FN (newdecl
))
1769 error ("deleted definition of %qD", newdecl
);
1770 error ("after previous declaration %q+D", olddecl
);
1772 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1776 /* Deal with C++: must preserve virtual function table size. */
1777 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1779 tree newtype
= TREE_TYPE (newdecl
);
1780 tree oldtype
= TREE_TYPE (olddecl
);
1782 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1783 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1784 CLASSTYPE_FRIEND_CLASSES (newtype
)
1785 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1787 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1790 /* Copy all the DECL_... slots specified in the new decl
1791 except for any that we copy here from the old type. */
1792 DECL_ATTRIBUTES (newdecl
)
1793 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1795 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1799 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1800 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1801 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1802 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1803 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1804 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1806 DECL_ATTRIBUTES (old_result
)
1807 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1809 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1811 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1812 && DECL_INITIAL (new_result
))
1814 if (DECL_INITIAL (old_result
))
1815 DECL_UNINLINABLE (old_result
) = 1;
1817 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1818 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1819 DECL_NOT_REALLY_EXTERN (old_result
)
1820 = DECL_NOT_REALLY_EXTERN (new_result
);
1821 DECL_INTERFACE_KNOWN (old_result
)
1822 = DECL_INTERFACE_KNOWN (new_result
);
1823 DECL_DECLARED_INLINE_P (old_result
)
1824 = DECL_DECLARED_INLINE_P (new_result
);
1825 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1826 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1831 DECL_DECLARED_INLINE_P (old_result
)
1832 |= DECL_DECLARED_INLINE_P (new_result
);
1833 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1834 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1835 check_redeclaration_exception_specification (newdecl
, olddecl
);
1839 /* If the new declaration is a definition, update the file and
1840 line information on the declaration, and also make
1841 the old declaration the same definition. */
1842 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1844 DECL_SOURCE_LOCATION (olddecl
)
1845 = DECL_SOURCE_LOCATION (old_result
)
1846 = DECL_SOURCE_LOCATION (newdecl
);
1847 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1848 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1851 DECL_ARGUMENTS (old_result
)
1852 = DECL_ARGUMENTS (new_result
);
1853 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1854 parm
= DECL_CHAIN (parm
))
1855 DECL_CONTEXT (parm
) = old_result
;
1864 /* Automatically handles default parameters. */
1865 tree oldtype
= TREE_TYPE (olddecl
);
1868 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1869 maybe_instantiate_noexcept (olddecl
);
1871 /* Merge the data types specified in the two decls. */
1872 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1874 /* If merge_types produces a non-typedef type, just use the old type. */
1875 if (TREE_CODE (newdecl
) == TYPE_DECL
1876 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1879 if (VAR_P (newdecl
))
1881 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1882 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1883 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1884 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1885 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1886 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1888 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1889 if (DECL_LANG_SPECIFIC (olddecl
)
1890 && CP_DECL_THREADPRIVATE_P (olddecl
))
1892 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1893 if (!DECL_LANG_SPECIFIC (newdecl
))
1894 retrofit_lang_decl (newdecl
);
1896 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1897 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1901 /* Do this after calling `merge_types' so that default
1902 parameters don't confuse us. */
1903 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1904 check_redeclaration_exception_specification (newdecl
, olddecl
);
1905 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1907 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1908 check_default_args (newdecl
);
1910 /* Lay the type out, unless already done. */
1911 if (! same_type_p (newtype
, oldtype
)
1912 && TREE_TYPE (newdecl
) != error_mark_node
1913 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1914 layout_type (TREE_TYPE (newdecl
));
1916 if ((VAR_P (newdecl
)
1917 || TREE_CODE (newdecl
) == PARM_DECL
1918 || TREE_CODE (newdecl
) == RESULT_DECL
1919 || TREE_CODE (newdecl
) == FIELD_DECL
1920 || TREE_CODE (newdecl
) == TYPE_DECL
)
1921 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1922 layout_decl (newdecl
, 0);
1924 /* Merge the type qualifiers. */
1925 if (TREE_READONLY (newdecl
))
1926 TREE_READONLY (olddecl
) = 1;
1927 if (TREE_THIS_VOLATILE (newdecl
))
1928 TREE_THIS_VOLATILE (olddecl
) = 1;
1929 if (TREE_NOTHROW (newdecl
))
1930 TREE_NOTHROW (olddecl
) = 1;
1932 /* Merge deprecatedness. */
1933 if (TREE_DEPRECATED (newdecl
))
1934 TREE_DEPRECATED (olddecl
) = 1;
1936 /* Preserve function specific target and optimization options */
1937 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1939 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1940 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1941 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1942 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1944 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1945 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1946 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1947 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1950 /* Merge the initialization information. */
1951 if (DECL_INITIAL (newdecl
) == NULL_TREE
1952 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1954 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1955 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1956 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1958 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1959 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1963 /* Merge the section attribute.
1964 We want to issue an error if the sections conflict but that must be
1965 done later in decl_attributes since we are called before attributes
1967 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1968 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1970 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1972 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1973 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1974 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1975 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1976 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1977 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1978 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1979 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1980 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1981 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1982 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1983 /* Keep the old RTL. */
1984 COPY_DECL_RTL (olddecl
, newdecl
);
1986 else if (VAR_P (newdecl
)
1987 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1989 /* Keep the old RTL. We cannot keep the old RTL if the old
1990 declaration was for an incomplete object and the new
1991 declaration is not since many attributes of the RTL will
1993 COPY_DECL_RTL (olddecl
, newdecl
);
1996 /* If cannot merge, then use the new type and qualifiers,
1997 and don't preserve the old rtl. */
2000 /* Clean out any memory we had of the old declaration. */
2001 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2003 TREE_VALUE (oldstatic
) = error_mark_node
;
2005 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2006 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2007 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2008 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2011 /* Merge the storage class information. */
2012 merge_weak (newdecl
, olddecl
);
2014 if (DECL_ONE_ONLY (olddecl
))
2015 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2017 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2018 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2019 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2020 if (! DECL_EXTERNAL (olddecl
))
2021 DECL_EXTERNAL (newdecl
) = 0;
2023 new_template_info
= NULL_TREE
;
2024 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2026 bool new_redefines_gnu_inline
= false;
2028 if (new_defines_function
2029 && ((DECL_INTERFACE_KNOWN (olddecl
)
2030 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2031 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2032 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2033 == FUNCTION_DECL
))))
2037 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2038 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2040 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2043 if (!new_redefines_gnu_inline
)
2045 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2046 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2047 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2049 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2050 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2051 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2053 /* If the OLDDECL is an instantiation and/or specialization,
2054 then the NEWDECL must be too. But, it may not yet be marked
2055 as such if the caller has created NEWDECL, but has not yet
2056 figured out that it is a redeclaration. */
2057 if (!DECL_USE_TEMPLATE (newdecl
))
2058 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2060 /* Don't really know how much of the language-specific
2061 values we should copy from old to new. */
2062 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2063 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2064 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2065 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2067 if (LANG_DECL_HAS_MIN (newdecl
))
2069 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2070 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2071 if (DECL_TEMPLATE_INFO (newdecl
))
2072 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2073 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2075 /* Only functions have these fields. */
2076 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2078 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2079 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2080 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2081 && DECL_HIDDEN_FRIEND_P (olddecl
)
2082 && newdecl_is_friend
);
2083 DECL_BEFRIENDING_CLASSES (newdecl
)
2084 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2085 DECL_BEFRIENDING_CLASSES (olddecl
));
2086 /* DECL_THUNKS is only valid for virtual functions,
2087 otherwise it is a DECL_FRIEND_CONTEXT. */
2088 if (DECL_VIRTUAL_P (newdecl
))
2089 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2091 /* Only variables have this field. */
2092 else if (VAR_P (newdecl
)
2093 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2094 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2097 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2101 /* Merge parameter attributes. */
2102 tree oldarg
, newarg
;
2103 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2104 newarg
= DECL_ARGUMENTS(newdecl
);
2106 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2107 DECL_ATTRIBUTES (newarg
)
2108 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2109 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2112 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2113 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2115 /* If newdecl is not a specialization, then it is not a
2116 template-related function at all. And that means that we
2117 should have exited above, returning 0. */
2118 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2120 if (DECL_ODR_USED (olddecl
))
2121 /* From [temp.expl.spec]:
2123 If a template, a member template or the member of a class
2124 template is explicitly specialized then that
2125 specialization shall be declared before the first use of
2126 that specialization that would cause an implicit
2127 instantiation to take place, in every translation unit in
2128 which such a use occurs. */
2129 error ("explicit specialization of %qD after first use",
2132 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2134 /* Don't propagate visibility from the template to the
2135 specialization here. We'll do that in determine_visibility if
2137 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2139 /* [temp.expl.spec/14] We don't inline explicit specialization
2140 just because the primary template says so. */
2142 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2143 the always_inline attribute. */
2144 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2145 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2147 if (DECL_DECLARED_INLINE_P (newdecl
))
2148 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2150 DECL_ATTRIBUTES (newdecl
)
2151 = remove_attribute ("always_inline",
2152 DECL_ATTRIBUTES (newdecl
));
2155 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2157 /* Never inline re-defined extern inline functions.
2158 FIXME: this could be better handled by keeping both
2159 function as separate declarations. */
2160 DECL_UNINLINABLE (newdecl
) = 1;
2164 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2165 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2167 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2169 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2170 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2172 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2173 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2174 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2175 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2178 /* Preserve abstractness on cloned [cd]tors. */
2179 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2181 /* Update newdecl's parms to point at olddecl. */
2182 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2183 parm
= DECL_CHAIN (parm
))
2184 DECL_CONTEXT (parm
) = olddecl
;
2188 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2189 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2190 COPY_DECL_RTL (newdecl
, olddecl
);
2192 if (! types_match
|| new_defines_function
)
2194 /* These need to be copied so that the names are available.
2195 Note that if the types do match, we'll preserve inline
2196 info and other bits, but if not, we won't. */
2197 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2198 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2200 /* If redeclaring a builtin function, it stays built in
2201 if newdecl is a gnu_inline definition, or if newdecl is just
2203 if (DECL_BUILT_IN (olddecl
)
2204 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2206 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2207 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2208 /* If we're keeping the built-in definition, keep the rtl,
2209 regardless of declaration matches. */
2210 COPY_DECL_RTL (olddecl
, newdecl
);
2211 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2213 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2216 /* If a compatible prototype of these builtin functions
2217 is seen, assume the runtime implements it with the
2218 expected semantics. */
2219 case BUILT_IN_STPCPY
:
2220 if (builtin_decl_explicit_p (fncode
))
2221 set_builtin_decl_implicit_p (fncode
, true);
2228 if (new_defines_function
)
2229 /* If defining a function declared with other language
2230 linkage, use the previously declared language linkage. */
2231 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2232 else if (types_match
)
2234 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2235 /* Don't clear out the arguments if we're just redeclaring a
2237 if (DECL_ARGUMENTS (olddecl
))
2238 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2241 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2242 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2244 /* Now preserve various other info from the definition. */
2245 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2246 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2247 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2248 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2250 /* Warn about conflicting visibility specifications. */
2251 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2252 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2253 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2255 warning_at (input_location
, OPT_Wattributes
,
2256 "%q+D: visibility attribute ignored because it", newdecl
);
2257 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2258 "conflicts with previous declaration here");
2260 /* Choose the declaration which specified visibility. */
2261 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2263 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2264 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2266 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2267 so keep this behavior. */
2268 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2270 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2271 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2273 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2274 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2276 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2277 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2279 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2280 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2281 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2283 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2284 with that from NEWDECL below. */
2285 if (DECL_LANG_SPECIFIC (olddecl
))
2287 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2288 != DECL_LANG_SPECIFIC (newdecl
));
2289 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2292 /* Merge the USED information. */
2293 if (TREE_USED (olddecl
))
2294 TREE_USED (newdecl
) = 1;
2295 else if (TREE_USED (newdecl
))
2296 TREE_USED (olddecl
) = 1;
2297 if (VAR_P (newdecl
))
2299 if (DECL_READ_P (olddecl
))
2300 DECL_READ_P (newdecl
) = 1;
2301 else if (DECL_READ_P (newdecl
))
2302 DECL_READ_P (olddecl
) = 1;
2304 if (DECL_PRESERVE_P (olddecl
))
2305 DECL_PRESERVE_P (newdecl
) = 1;
2306 else if (DECL_PRESERVE_P (newdecl
))
2307 DECL_PRESERVE_P (olddecl
) = 1;
2309 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2310 to olddecl and deleted. */
2311 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2312 && DECL_FUNCTION_VERSIONED (olddecl
))
2314 /* Set the flag for newdecl so that it gets copied to olddecl. */
2315 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2316 /* newdecl will be purged after copying to olddecl and is no longer
2318 delete_function_version (newdecl
);
2321 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2325 function_size
= sizeof (struct tree_decl_common
);
2327 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2328 (char *) newdecl
+ sizeof (struct tree_common
),
2329 function_size
- sizeof (struct tree_common
));
2331 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2332 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2333 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2334 if (new_template_info
)
2335 /* If newdecl is a template instantiation, it is possible that
2336 the following sequence of events has occurred:
2338 o A friend function was declared in a class template. The
2339 class template was instantiated.
2341 o The instantiation of the friend declaration was
2342 recorded on the instantiation list, and is newdecl.
2344 o Later, however, instantiate_class_template called pushdecl
2345 on the newdecl to perform name injection. But, pushdecl in
2346 turn called duplicate_decls when it discovered that another
2347 declaration of a global function with the same name already
2350 o Here, in duplicate_decls, we decided to clobber newdecl.
2352 If we're going to do that, we'd better make sure that
2353 olddecl, and not newdecl, is on the list of
2354 instantiations so that if we try to do the instantiation
2355 again we won't get the clobbered declaration. */
2356 reregister_specialization (newdecl
,
2362 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2363 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2364 (char *) newdecl
+ sizeof (struct tree_common
),
2365 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2366 switch (TREE_CODE (olddecl
))
2376 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2377 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2378 size
- sizeof (struct tree_decl_common
)
2379 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2383 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2384 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2385 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2386 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2390 DECL_UID (olddecl
) = olddecl_uid
;
2392 DECL_FRIEND_P (olddecl
) = 1;
2395 DECL_ANTICIPATED (olddecl
) = 1;
2396 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2399 /* NEWDECL contains the merged attribute lists.
2400 Update OLDDECL to be the same. */
2401 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2403 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2404 so that encode_section_info has a chance to look at the new decl
2405 flags and attributes. */
2406 if (DECL_RTL_SET_P (olddecl
)
2407 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2409 && TREE_STATIC (olddecl
))))
2410 make_decl_rtl (olddecl
);
2412 /* The NEWDECL will no longer be needed. Because every out-of-class
2413 declaration of a member results in a call to duplicate_decls,
2414 freeing these nodes represents in a significant savings. */
2420 /* Return zero if the declaration NEWDECL is valid
2421 when the declaration OLDDECL (assumed to be for the same name)
2422 has already been seen.
2423 Otherwise return an error message format string with a %s
2424 where the identifier should go. */
2427 redeclaration_error_message (tree newdecl
, tree olddecl
)
2429 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2431 /* Because C++ can put things into name space for free,
2432 constructs like "typedef struct foo { ... } foo"
2433 would look like an erroneous redeclaration. */
2434 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2437 return G_("redefinition of %q#D");
2439 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2441 /* If this is a pure function, its olddecl will actually be
2442 the original initialization to `0' (which we force to call
2443 abort()). Don't complain about redefinition in this case. */
2444 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2445 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2448 /* If both functions come from different namespaces, this is not
2449 a redeclaration - this is a conflict with a used function. */
2450 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2451 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2452 && ! decls_match (olddecl
, newdecl
))
2453 return G_("%qD conflicts with used function");
2455 /* We'll complain about linkage mismatches in
2456 warn_extern_redeclared_static. */
2458 /* Defining the same name twice is no good. */
2459 if (DECL_INITIAL (olddecl
) != NULL_TREE
2460 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2462 if (DECL_NAME (olddecl
) == NULL_TREE
)
2463 return G_("%q#D not declared in class");
2464 else if (!GNU_INLINE_P (olddecl
)
2465 || GNU_INLINE_P (newdecl
))
2466 return G_("redefinition of %q#D");
2469 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2471 bool olda
= GNU_INLINE_P (olddecl
);
2472 bool newa
= GNU_INLINE_P (newdecl
);
2477 return G_("%q+D redeclared inline with "
2478 "%<gnu_inline%> attribute");
2480 return G_("%q+D redeclared inline without "
2481 "%<gnu_inline%> attribute");
2485 check_abi_tag_redeclaration
2486 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2487 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2491 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2495 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2497 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2498 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2499 return G_("redefinition of %q#D");
2503 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2504 || (DECL_TEMPLATE_RESULT (newdecl
)
2505 == DECL_TEMPLATE_RESULT (olddecl
)))
2508 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2509 if (DECL_TEMPLATE_INFO (nt
))
2510 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2511 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2512 if (DECL_TEMPLATE_INFO (ot
))
2513 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2514 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2515 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2516 return G_("redefinition of %q#D");
2518 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2520 bool olda
= GNU_INLINE_P (ot
);
2521 bool newa
= GNU_INLINE_P (nt
);
2526 return G_("%q+D redeclared inline with "
2527 "%<gnu_inline%> attribute");
2529 return G_("%q+D redeclared inline without "
2530 "%<gnu_inline%> attribute");
2534 /* Core issue #226 (C++0x):
2536 If a friend function template declaration specifies a
2537 default template-argument, that declaration shall be a
2538 definition and shall be the only declaration of the
2539 function template in the translation unit. */
2540 if ((cxx_dialect
!= cxx98
)
2541 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2542 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2543 /*is_primary=*/true,
2544 /*is_partial=*/false,
2545 /*is_friend_decl=*/2))
2546 return G_("redeclaration of friend %q#D "
2547 "may not have default template arguments");
2551 else if (VAR_P (newdecl
)
2552 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2553 && (! DECL_LANG_SPECIFIC (olddecl
)
2554 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2555 || DECL_THREAD_LOCAL_P (newdecl
)))
2557 /* Only variables can be thread-local, and all declarations must
2558 agree on this property. */
2559 if (DECL_THREAD_LOCAL_P (newdecl
))
2560 return G_("thread-local declaration of %q#D follows "
2561 "non-thread-local declaration");
2563 return G_("non-thread-local declaration of %q#D follows "
2564 "thread-local declaration");
2566 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2568 /* The objects have been declared at namespace scope. If either
2569 is a member of an anonymous union, then this is an invalid
2570 redeclaration. For example:
2576 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2577 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2578 return G_("redeclaration of %q#D");
2579 /* If at least one declaration is a reference, there is no
2580 conflict. For example:
2586 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2588 /* Reject two definitions. */
2589 return G_("redefinition of %q#D");
2593 /* Objects declared with block scope: */
2594 /* Reject two definitions, and reject a definition
2595 together with an external reference. */
2596 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2597 return G_("redeclaration of %q#D");
2602 /* Hash and equality functions for the named_label table. */
2605 named_label_entry_hash (const void *data
)
2607 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2608 return DECL_UID (ent
->label_decl
);
2612 named_label_entry_eq (const void *a
, const void *b
)
2614 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2615 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2616 return ent_a
->label_decl
== ent_b
->label_decl
;
2619 /* Create a new label, named ID. */
2622 make_label_decl (tree id
, int local_p
)
2624 struct named_label_entry
*ent
;
2628 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2630 DECL_CONTEXT (decl
) = current_function_decl
;
2631 DECL_MODE (decl
) = VOIDmode
;
2632 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2634 /* Say where one reference is to the label, for the sake of the
2635 error if it is not defined. */
2636 DECL_SOURCE_LOCATION (decl
) = input_location
;
2638 /* Record the fact that this identifier is bound to this label. */
2639 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2641 /* Create the label htab for the function on demand. */
2643 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2644 named_label_entry_eq
, NULL
);
2646 /* Record this label on the list of labels used in this function.
2647 We do this before calling make_label_decl so that we get the
2648 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2649 ent
= ggc_alloc_cleared_named_label_entry ();
2650 ent
->label_decl
= decl
;
2652 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2653 gcc_assert (*slot
== NULL
);
2659 /* Look for a label named ID in the current function. If one cannot
2660 be found, create one. (We keep track of used, but undefined,
2661 labels, and complain about them at the end of a function.) */
2664 lookup_label_1 (tree id
)
2668 /* You can't use labels at global scope. */
2669 if (current_function_decl
== NULL_TREE
)
2671 error ("label %qE referenced outside of any function", id
);
2675 /* See if we've already got this label. */
2676 decl
= IDENTIFIER_LABEL_VALUE (id
);
2677 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2680 decl
= make_label_decl (id
, /*local_p=*/0);
2684 /* Wrapper for lookup_label_1. */
2687 lookup_label (tree id
)
2690 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2691 ret
= lookup_label_1 (id
);
2692 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2696 /* Declare a local label named ID. */
2699 declare_local_label (tree id
)
2702 cp_label_binding bind
;
2704 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2705 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2706 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2708 decl
= make_label_decl (id
, /*local_p=*/1);
2710 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2715 /* Returns nonzero if it is ill-formed to jump past the declaration of
2716 DECL. Returns 2 if it's also a real problem. */
2719 decl_jump_unsafe (tree decl
)
2721 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2722 with automatic storage duration is not in scope to a point where it is
2723 in scope is ill-formed unless the variable has scalar type, class type
2724 with a trivial default constructor and a trivial destructor, a
2725 cv-qualified version of one of these types, or an array of one of the
2726 preceding types and is declared without an initializer (8.5). */
2727 tree type
= TREE_TYPE (decl
);
2729 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2730 || type
== error_mark_node
)
2733 type
= strip_array_types (type
);
2735 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2738 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2744 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2747 identify_goto (tree decl
, const location_t
*locus
)
2750 permerror (input_location
, "jump to label %qD", decl
);
2752 permerror (input_location
, "jump to case label");
2754 permerror (*locus
, " from here");
2757 /* Check that a single previously seen jump to a newly defined label
2758 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2759 the jump context; NAMES are the names in scope in LEVEL at the jump
2760 context; LOCUS is the source position of the jump or 0. Returns
2761 true if all is well. */
2764 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2765 bool exited_omp
, const location_t
*locus
)
2767 cp_binding_level
*b
;
2768 bool identified
= false, saw_eh
= false, saw_omp
= false;
2772 identify_goto (decl
, locus
);
2773 error (" exits OpenMP structured block");
2774 identified
= saw_omp
= true;
2777 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2779 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2781 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2782 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2783 : TREE_CHAIN (new_decls
)))
2785 int problem
= decl_jump_unsafe (new_decls
);
2791 identify_goto (decl
, locus
);
2795 error (" crosses initialization of %q+#D", new_decls
);
2797 permerror (input_location
, " enters scope of %q+#D which has "
2798 "non-trivial destructor", new_decls
);
2803 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2807 identify_goto (decl
, locus
);
2810 if (b
->kind
== sk_try
)
2811 error (" enters try block");
2813 error (" enters catch block");
2816 if (b
->kind
== sk_omp
&& !saw_omp
)
2820 identify_goto (decl
, locus
);
2823 error (" enters OpenMP structured block");
2832 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2834 check_previous_goto_1 (decl
, use
->binding_level
,
2835 use
->names_in_scope
, use
->in_omp_scope
,
2836 &use
->o_goto_locus
);
2840 check_switch_goto (cp_binding_level
* level
)
2842 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2845 /* Check that a new jump to a label DECL is OK. Called by
2846 finish_goto_stmt. */
2849 check_goto (tree decl
)
2851 struct named_label_entry
*ent
, dummy
;
2852 bool saw_catch
= false, identified
= false;
2856 /* We can't know where a computed goto is jumping.
2857 So we assume that it's OK. */
2858 if (TREE_CODE (decl
) != LABEL_DECL
)
2861 /* We didn't record any information about this label when we created it,
2862 and there's not much point since it's trivial to analyze as a return. */
2863 if (decl
== cdtor_label
)
2866 dummy
.label_decl
= decl
;
2867 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2868 gcc_assert (ent
!= NULL
);
2870 /* If the label hasn't been defined yet, defer checking. */
2871 if (! DECL_INITIAL (decl
))
2873 struct named_label_use_entry
*new_use
;
2875 /* Don't bother creating another use if the last goto had the
2876 same data, and will therefore create the same set of errors. */
2878 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2881 new_use
= ggc_alloc_named_label_use_entry ();
2882 new_use
->binding_level
= current_binding_level
;
2883 new_use
->names_in_scope
= current_binding_level
->names
;
2884 new_use
->o_goto_locus
= input_location
;
2885 new_use
->in_omp_scope
= false;
2887 new_use
->next
= ent
->uses
;
2888 ent
->uses
= new_use
;
2892 if (ent
->in_try_scope
|| ent
->in_catch_scope
2893 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2895 permerror (input_location
, "jump to label %q+D", decl
);
2896 permerror (input_location
, " from here");
2900 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2902 int u
= decl_jump_unsafe (bad
);
2904 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2906 /* Can't skip init of __exception_info. */
2907 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2911 error (" skips initialization of %q+#D", bad
);
2913 permerror (input_location
, " enters scope of %q+#D which has "
2914 "non-trivial destructor", bad
);
2917 if (ent
->in_try_scope
)
2918 error (" enters try block");
2919 else if (ent
->in_catch_scope
&& !saw_catch
)
2920 error (" enters catch block");
2922 if (ent
->in_omp_scope
)
2923 error (" enters OpenMP structured block");
2924 else if (flag_openmp
)
2926 cp_binding_level
*b
;
2927 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2929 if (b
== ent
->binding_level
)
2931 if (b
->kind
== sk_omp
)
2935 permerror (input_location
, "jump to label %q+D", decl
);
2936 permerror (input_location
, " from here");
2939 error (" exits OpenMP structured block");
2946 /* Check that a return is ok wrt OpenMP structured blocks.
2947 Called by finish_return_stmt. Returns true if all is well. */
2950 check_omp_return (void)
2952 cp_binding_level
*b
;
2953 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2954 if (b
->kind
== sk_omp
)
2956 error ("invalid exit from OpenMP structured block");
2959 else if (b
->kind
== sk_function_parms
)
2964 /* Define a label, specifying the location in the source file.
2965 Return the LABEL_DECL node for the label. */
2968 define_label_1 (location_t location
, tree name
)
2970 struct named_label_entry
*ent
, dummy
;
2971 cp_binding_level
*p
;
2974 decl
= lookup_label (name
);
2976 dummy
.label_decl
= decl
;
2977 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2978 gcc_assert (ent
!= NULL
);
2980 /* After labels, make any new cleanups in the function go into their
2981 own new (temporary) binding contour. */
2982 for (p
= current_binding_level
;
2983 p
->kind
!= sk_function_parms
;
2985 p
->more_cleanups_ok
= 0;
2987 if (name
== get_identifier ("wchar_t"))
2988 permerror (input_location
, "label named wchar_t");
2990 if (DECL_INITIAL (decl
) != NULL_TREE
)
2992 error ("duplicate label %qD", decl
);
2993 return error_mark_node
;
2997 struct named_label_use_entry
*use
;
2999 /* Mark label as having been defined. */
3000 DECL_INITIAL (decl
) = error_mark_node
;
3001 /* Say where in the source. */
3002 DECL_SOURCE_LOCATION (decl
) = location
;
3004 ent
->binding_level
= current_binding_level
;
3005 ent
->names_in_scope
= current_binding_level
->names
;
3007 for (use
= ent
->uses
; use
; use
= use
->next
)
3008 check_previous_goto (decl
, use
);
3015 /* Wrapper for define_label_1. */
3018 define_label (location_t location
, tree name
)
3021 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3022 ret
= define_label_1 (location
, name
);
3023 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3030 cp_binding_level
*level
;
3031 struct cp_switch
*next
;
3032 /* The SWITCH_STMT being built. */
3034 /* A splay-tree mapping the low element of a case range to the high
3035 element, or NULL_TREE if there is no high element. Used to
3036 determine whether or not a new case label duplicates an old case
3037 label. We need a tree, rather than simply a hash table, because
3038 of the GNU case range extension. */
3042 /* A stack of the currently active switch statements. The innermost
3043 switch statement is on the top of the stack. There is no need to
3044 mark the stack for garbage collection because it is only active
3045 during the processing of the body of a function, and we never
3046 collect at that point. */
3048 static struct cp_switch
*switch_stack
;
3050 /* Called right after a switch-statement condition is parsed.
3051 SWITCH_STMT is the switch statement being parsed. */
3054 push_switch (tree switch_stmt
)
3056 struct cp_switch
*p
= XNEW (struct cp_switch
);
3057 p
->level
= current_binding_level
;
3058 p
->next
= switch_stack
;
3059 p
->switch_stmt
= switch_stmt
;
3060 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3067 struct cp_switch
*cs
= switch_stack
;
3068 location_t switch_location
;
3070 /* Emit warnings as needed. */
3071 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3072 if (!processing_template_decl
)
3073 c_do_switch_warnings (cs
->cases
, switch_location
,
3074 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3075 SWITCH_STMT_COND (cs
->switch_stmt
));
3077 splay_tree_delete (cs
->cases
);
3078 switch_stack
= switch_stack
->next
;
3082 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3083 condition. Note that if TYPE and VALUE are already integral we don't
3084 really do the conversion because the language-independent
3085 warning/optimization code will work better that way. */
3088 case_conversion (tree type
, tree value
)
3090 if (value
== NULL_TREE
)
3093 if (cxx_dialect
>= cxx11
3094 && (SCOPED_ENUM_P (type
)
3095 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3097 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3098 type
= type_promotes_to (type
);
3099 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3101 return cxx_constant_value (value
);
3104 /* Note that we've seen a definition of a case label, and complain if this
3105 is a bad place for one. */
3108 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3111 cp_binding_level
*p
;
3114 if (processing_template_decl
)
3118 /* For templates, just add the case label; we'll do semantic
3119 analysis at instantiation-time. */
3120 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3121 return add_stmt (build_case_label (low_value
, high_value
, label
));
3124 /* Find the condition on which this switch statement depends. */
3125 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3126 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3127 cond
= TREE_VALUE (cond
);
3129 if (!check_switch_goto (switch_stack
->level
))
3130 return error_mark_node
;
3132 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3134 low_value
= case_conversion (type
, low_value
);
3135 high_value
= case_conversion (type
, high_value
);
3137 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3138 low_value
, high_value
);
3140 /* After labels, make any new cleanups in the function go into their
3141 own new (temporary) binding contour. */
3142 for (p
= current_binding_level
;
3143 p
->kind
!= sk_function_parms
;
3145 p
->more_cleanups_ok
= 0;
3150 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3153 typename_hash (const void* k
)
3156 const_tree
const t
= (const_tree
) k
;
3158 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3159 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3164 typedef struct typename_info
{
3172 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3173 really of type `typename_info*' */
3176 typename_compare (const void * k1
, const void * k2
)
3178 const_tree
const t1
= (const_tree
) k1
;
3179 const typename_info
*const t2
= (const typename_info
*) k2
;
3181 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3182 && TYPE_CONTEXT (t1
) == t2
->scope
3183 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3184 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3185 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3188 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3189 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3191 Returns the new TYPENAME_TYPE. */
3193 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3196 build_typename_type (tree context
, tree name
, tree fullname
,
3197 enum tag_types tag_type
)
3205 if (typename_htab
== NULL
)
3206 typename_htab
= htab_create_ggc (61, &typename_hash
,
3207 &typename_compare
, NULL
);
3209 ti
.scope
= FROB_CONTEXT (context
);
3211 ti
.template_id
= fullname
;
3212 ti
.enum_p
= tag_type
== enum_type
;
3213 ti
.class_p
= (tag_type
== class_type
3214 || tag_type
== record_type
3215 || tag_type
== union_type
);
3216 hash
= (htab_hash_pointer (ti
.scope
)
3217 ^ htab_hash_pointer (ti
.name
));
3219 /* See if we already have this type. */
3220 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3225 /* Build the TYPENAME_TYPE. */
3226 t
= cxx_make_type (TYPENAME_TYPE
);
3227 TYPE_CONTEXT (t
) = ti
.scope
;
3228 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3229 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3230 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3232 /* Build the corresponding TYPE_DECL. */
3233 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3234 TYPE_NAME (TREE_TYPE (d
)) = d
;
3235 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3236 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3237 DECL_ARTIFICIAL (d
) = 1;
3239 /* Store it in the hash table. */
3242 /* TYPENAME_TYPEs must always be compared structurally, because
3243 they may or may not resolve down to another type depending on
3244 the currently open classes. */
3245 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3251 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3252 provided to name the type. Returns an appropriate type, unless an
3253 error occurs, in which case error_mark_node is returned. If we
3254 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3255 return that, rather than the _TYPE it corresponds to, in other
3256 cases we look through the type decl. If TF_ERROR is set, complain
3257 about errors, otherwise be quiet. */
3260 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3261 tsubst_flags_t complain
)
3267 if (name
== error_mark_node
3268 || context
== NULL_TREE
3269 || context
== error_mark_node
)
3270 return error_mark_node
;
3274 if (!(TYPE_LANG_SPECIFIC (name
)
3275 && (CLASSTYPE_IS_TEMPLATE (name
)
3276 || CLASSTYPE_USE_TEMPLATE (name
))))
3277 name
= TYPE_IDENTIFIER (name
);
3279 /* Create a TEMPLATE_ID_EXPR for the type. */
3280 name
= build_nt (TEMPLATE_ID_EXPR
,
3281 CLASSTYPE_TI_TEMPLATE (name
),
3282 CLASSTYPE_TI_ARGS (name
));
3284 else if (TREE_CODE (name
) == TYPE_DECL
)
3285 name
= DECL_NAME (name
);
3289 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3291 name
= TREE_OPERAND (name
, 0);
3292 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3293 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3294 else if (TREE_CODE (name
) == OVERLOAD
)
3296 if (complain
& tf_error
)
3297 error ("%qD is not a type", name
);
3298 return error_mark_node
;
3301 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3303 if (complain
& tf_error
)
3304 error ("%qD used without template parameters", name
);
3305 return error_mark_node
;
3307 gcc_assert (identifier_p (name
));
3308 gcc_assert (TYPE_P (context
));
3310 if (!MAYBE_CLASS_TYPE_P (context
))
3312 if (complain
& tf_error
)
3313 error ("%q#T is not a class", context
);
3314 return error_mark_node
;
3317 /* When the CONTEXT is a dependent type, NAME could refer to a
3318 dependent base class of CONTEXT. But look inside it anyway
3319 if CONTEXT is a currently open scope, in case it refers to a
3320 member of the current instantiation or a non-dependent base;
3321 lookup will stop when we hit a dependent base. */
3322 if (!dependent_scope_p (context
))
3323 /* We should only set WANT_TYPE when we're a nested typename type.
3324 Then we can give better diagnostics if we find a non-type. */
3325 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3329 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3330 return build_typename_type (context
, name
, fullname
, tag_type
);
3332 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3336 if (complain
& tf_error
)
3337 error (want_template
? G_("no class template named %q#T in %q#T")
3338 : G_("no type named %q#T in %q#T"), name
, context
);
3339 return error_mark_node
;
3342 /* Pull out the template from an injected-class-name (or multiple). */
3344 t
= maybe_get_template_decl_from_type_decl (t
);
3346 if (TREE_CODE (t
) == TREE_LIST
)
3348 if (complain
& tf_error
)
3350 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3351 print_candidates (t
);
3353 return error_mark_node
;
3356 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3358 if (complain
& tf_error
)
3359 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3361 return error_mark_node
;
3363 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3365 if (complain
& tf_error
)
3366 error ("%<typename %T::%D%> names %q#T, which is not a type",
3368 return error_mark_node
;
3371 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3372 return error_mark_node
;
3374 /* If we are currently parsing a template and if T is a typedef accessed
3375 through CONTEXT then we need to remember and check access of T at
3376 template instantiation time. */
3377 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3380 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3382 /*entering_scope=*/0,
3383 tf_warning_or_error
| tf_user
);
3385 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3388 maybe_record_typedef_use (t
);
3393 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3394 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3395 in which case error_mark_node is returned.
3397 If PARM_LIST is non-NULL, also make sure that the template parameter
3398 list of TEMPLATE_DECL matches.
3400 If COMPLAIN zero, don't complain about any errors that occur. */
3403 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3404 tsubst_flags_t complain
)
3410 name
= TYPE_IDENTIFIER (name
);
3411 else if (DECL_P (name
))
3412 name
= DECL_NAME (name
);
3413 gcc_assert (identifier_p (name
));
3415 if (!dependent_type_p (context
)
3416 || currently_open_class (context
))
3418 tree tmpl
= NULL_TREE
;
3420 if (MAYBE_CLASS_TYPE_P (context
))
3421 tmpl
= lookup_field (context
, name
, 0, false);
3423 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3424 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3426 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3428 if (complain
& tf_error
)
3429 error ("no class template named %q#T in %q#T", name
, context
);
3430 return error_mark_node
;
3434 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3436 if (complain
& tf_error
)
3438 error ("template parameters do not match template");
3439 error ("%q+D declared here", tmpl
);
3441 return error_mark_node
;
3444 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3446 return error_mark_node
;
3451 /* Build the UNBOUND_CLASS_TEMPLATE. */
3452 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3453 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3454 TREE_TYPE (t
) = NULL_TREE
;
3455 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3457 /* Build the corresponding TEMPLATE_DECL. */
3458 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3459 TYPE_NAME (TREE_TYPE (d
)) = d
;
3460 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3461 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3462 DECL_ARTIFICIAL (d
) = 1;
3463 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3470 /* Push the declarations of builtin types into the namespace.
3471 RID_INDEX is the index of the builtin type in the array
3472 RID_POINTERS. NAME is the name used when looking up the builtin
3473 type. TYPE is the _TYPE node for the builtin type. */
3476 record_builtin_type (enum rid rid_index
,
3480 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3481 tree tdecl
= NULL_TREE
;
3483 if ((int) rid_index
< (int) RID_MAX
)
3484 rname
= ridpointers
[(int) rid_index
];
3486 tname
= get_identifier (name
);
3488 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3489 eliminated. Built-in types should not be looked up name; their
3490 names are keywords that the parser can recognize. However, there
3491 is code in c-common.c that uses identifier_global_value to look
3492 up built-in types by name. */
3495 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3496 DECL_ARTIFICIAL (tdecl
) = 1;
3497 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3503 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3504 DECL_ARTIFICIAL (tdecl
) = 1;
3506 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3509 if (!TYPE_NAME (type
))
3510 TYPE_NAME (type
) = tdecl
;
3513 debug_hooks
->type_decl (tdecl
, 0);
3516 /* Record one of the standard Java types.
3517 * Declare it as having the given NAME.
3518 * If SIZE > 0, it is the size of one of the integral types;
3519 * otherwise it is the negative of the size of one of the other types. */
3522 record_builtin_java_type (const char* name
, int size
)
3527 type
= build_nonstandard_integer_type (size
, 0);
3528 type
= build_distinct_type_copy (type
);
3530 else if (size
> -32)
3533 /* "__java_char" or ""__java_boolean". */
3534 type
= build_nonstandard_integer_type (-size
, 1);
3535 type
= build_distinct_type_copy (type
);
3536 /* Get the signed type cached and attached to the unsigned type,
3537 so it doesn't get garbage-collected at "random" times,
3538 causing potential codegen differences out of different UIDs
3539 and different alias set numbers. */
3540 stype
= build_nonstandard_integer_type (-size
, 0);
3541 stype
= build_distinct_type_copy (stype
);
3542 TREE_CHAIN (type
) = stype
;
3543 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3546 { /* "__java_float" or ""__java_double". */
3547 type
= make_node (REAL_TYPE
);
3548 TYPE_PRECISION (type
) = - size
;
3551 record_builtin_type (RID_MAX
, name
, type
);
3552 decl
= TYPE_NAME (type
);
3554 /* Suppress generate debug symbol entries for these types,
3555 since for normal C++ they are just clutter.
3556 However, push_lang_context undoes this if extern "Java" is seen. */
3557 DECL_IGNORED_P (decl
) = 1;
3559 TYPE_FOR_JAVA (type
) = 1;
3563 /* Push a type into the namespace so that the back ends ignore it. */
3566 record_unknown_type (tree type
, const char* name
)
3568 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3569 TYPE_DECL
, get_identifier (name
), type
));
3570 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3571 DECL_IGNORED_P (decl
) = 1;
3572 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3573 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3574 TYPE_ALIGN (type
) = 1;
3575 TYPE_USER_ALIGN (type
) = 0;
3576 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3579 /* A string for which we should create an IDENTIFIER_NODE at
3582 typedef struct predefined_identifier
3584 /* The name of the identifier. */
3585 const char *const name
;
3586 /* The place where the IDENTIFIER_NODE should be stored. */
3588 /* Nonzero if this is the name of a constructor or destructor. */
3589 const int ctor_or_dtor_p
;
3590 } predefined_identifier
;
3592 /* Create all the predefined identifiers. */
3595 initialize_predefined_identifiers (void)
3597 const predefined_identifier
*pid
;
3599 /* A table of identifiers to create at startup. */
3600 static const predefined_identifier predefined_identifiers
[] = {
3601 { "C++", &lang_name_cplusplus
, 0 },
3602 { "C", &lang_name_c
, 0 },
3603 { "Java", &lang_name_java
, 0 },
3604 /* Some of these names have a trailing space so that it is
3605 impossible for them to conflict with names written by users. */
3606 { "__ct ", &ctor_identifier
, 1 },
3607 { "__base_ctor ", &base_ctor_identifier
, 1 },
3608 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3609 { "__dt ", &dtor_identifier
, 1 },
3610 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3611 { "__base_dtor ", &base_dtor_identifier
, 1 },
3612 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3613 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3614 { "nelts", &nelts_identifier
, 0 },
3615 { THIS_NAME
, &this_identifier
, 0 },
3616 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3617 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3618 { "_vptr", &vptr_identifier
, 0 },
3619 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3620 { "::", &global_scope_name
, 0 },
3621 { "std", &std_identifier
, 0 },
3625 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3627 *pid
->node
= get_identifier (pid
->name
);
3628 if (pid
->ctor_or_dtor_p
)
3629 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3633 /* Create the predefined scalar types of C,
3634 and some nodes representing standard constants (0, 1, (void *)0).
3635 Initialize the global binding level.
3636 Make definitions for built-in primitive functions. */
3639 cxx_init_decl_processing (void)
3642 tree void_ftype_ptr
;
3644 /* Create all the identifiers we need. */
3645 initialize_predefined_identifiers ();
3647 /* Create the global variables. */
3648 push_to_top_level ();
3650 current_function_decl
= NULL_TREE
;
3651 current_binding_level
= NULL
;
3652 /* Enter the global namespace. */
3653 gcc_assert (global_namespace
== NULL_TREE
);
3654 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3656 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3657 TREE_PUBLIC (global_namespace
) = 1;
3658 begin_scope (sk_namespace
, global_namespace
);
3660 if (flag_visibility_ms_compat
)
3661 default_visibility
= VISIBILITY_HIDDEN
;
3664 current_lang_name
= lang_name_c
;
3666 /* Create the `std' namespace. */
3667 push_namespace (std_identifier
);
3668 std_node
= current_namespace
;
3671 c_common_nodes_and_builtins ();
3673 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3674 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3675 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3676 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3677 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3678 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3679 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3680 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3682 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3684 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3685 truthvalue_type_node
= boolean_type_node
;
3686 truthvalue_false_node
= boolean_false_node
;
3687 truthvalue_true_node
= boolean_true_node
;
3689 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3690 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3691 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3694 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3697 delta_type_node
= ptrdiff_type_node
;
3698 vtable_index_type
= ptrdiff_type_node
;
3700 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3701 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3702 void_ftype_ptr
= build_function_type_list (void_type_node
,
3703 ptr_type_node
, NULL_TREE
);
3705 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3707 /* C++ extensions */
3709 unknown_type_node
= make_node (LANG_TYPE
);
3710 record_unknown_type (unknown_type_node
, "unknown type");
3712 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3713 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3715 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3717 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3718 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3720 init_list_type_node
= make_node (LANG_TYPE
);
3721 record_unknown_type (init_list_type_node
, "init list");
3724 /* Make sure we get a unique function type, so we can give
3725 its pointer type a name. (This wins for gdb.) */
3726 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3727 TREE_TYPE (vfunc_type
) = integer_type_node
;
3728 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3729 layout_type (vfunc_type
);
3731 vtable_entry_type
= build_pointer_type (vfunc_type
);
3733 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3736 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3737 layout_type (vtbl_type_node
);
3738 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3739 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3740 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3741 layout_type (vtbl_ptr_type_node
);
3742 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3744 push_namespace (get_identifier ("__cxxabiv1"));
3745 abi_node
= current_namespace
;
3748 global_type_node
= make_node (LANG_TYPE
);
3749 record_unknown_type (global_type_node
, "global type");
3752 current_lang_name
= lang_name_cplusplus
;
3755 tree newattrs
, extvisattr
;
3756 tree newtype
, deltype
;
3757 tree ptr_ftype_sizetype
;
3761 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3762 if (cxx_dialect
== cxx98
)
3765 tree bad_alloc_type_node
;
3766 tree bad_alloc_decl
;
3768 push_namespace (std_identifier
);
3769 bad_alloc_id
= get_identifier ("bad_alloc");
3770 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3771 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3773 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3774 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3778 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3781 new_eh_spec
= noexcept_false_spec
;
3783 /* Ensure attribs.c is initialized. */
3785 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3787 newattrs
= tree_cons (get_identifier ("alloc_size"),
3788 build_tree_list (NULL_TREE
, integer_one_node
),
3790 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3791 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3792 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3793 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3794 push_cp_library_fn (NEW_EXPR
, newtype
);
3795 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3796 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3797 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3799 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3800 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3801 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3802 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3803 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3804 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3805 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3806 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3810 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3812 /* Perform other language dependent initializations. */
3813 init_class_processing ();
3814 init_rtti_processing ();
3815 init_template_processing ();
3817 if (flag_exceptions
)
3818 init_exception_processing ();
3820 if (! supports_one_only ())
3823 make_fname_decl
= cp_make_fname_decl
;
3824 start_fname_decls ();
3826 /* Show we use EH for cleanups. */
3827 if (flag_exceptions
)
3828 using_eh_for_cleanups ();
3831 /* Generate an initializer for a function naming variable from
3832 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3833 filled in with the type of the init. */
3836 cp_fname_init (const char* name
, tree
*type_p
)
3838 tree domain
= NULL_TREE
;
3840 tree init
= NULL_TREE
;
3845 length
= strlen (name
);
3846 domain
= build_index_type (size_int (length
));
3847 init
= build_string (length
+ 1, name
);
3850 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3851 type
= build_cplus_array_type (type
, domain
);
3856 TREE_TYPE (init
) = type
;
3858 init
= error_mark_node
;
3863 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3864 the decl, LOC is the location to give the decl, NAME is the
3865 initialization string and TYPE_DEP indicates whether NAME depended
3866 on the type of the function. We make use of that to detect
3867 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3868 at the point of first use, so we mustn't push the decl now. */
3871 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3873 const char *const name
= (type_dep
&& processing_template_decl
3874 ? NULL
: fname_as_string (type_dep
));
3876 tree init
= cp_fname_init (name
, &type
);
3877 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3880 free (CONST_CAST (char *, name
));
3882 /* As we're using pushdecl_with_scope, we must set the context. */
3883 DECL_CONTEXT (decl
) = current_function_decl
;
3885 TREE_STATIC (decl
) = 1;
3886 TREE_READONLY (decl
) = 1;
3887 DECL_ARTIFICIAL (decl
) = 1;
3889 TREE_USED (decl
) = 1;
3891 if (current_function_decl
)
3893 cp_binding_level
*b
= current_binding_level
;
3894 if (b
->kind
== sk_function_parms
)
3895 return error_mark_node
;
3896 while (b
->level_chain
->kind
!= sk_function_parms
)
3898 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3899 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3900 LOOKUP_ONLYCONVERTING
);
3904 DECL_THIS_STATIC (decl
) = true;
3905 pushdecl_top_level_and_finish (decl
, init
);
3912 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3914 tree id
= DECL_NAME (decl
);
3915 const char *name
= IDENTIFIER_POINTER (id
);
3917 retrofit_lang_decl (decl
);
3919 DECL_ARTIFICIAL (decl
) = 1;
3920 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3921 SET_DECL_LANGUAGE (decl
, lang_c
);
3922 /* Runtime library routines are, by definition, available in an
3923 external shared object. */
3924 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3925 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3927 DECL_CONTEXT (decl
) = context
;
3930 pushdecl_top_level (decl
);
3934 /* A function in the user's namespace should have an explicit
3935 declaration before it is used. Mark the built-in function as
3936 anticipated but not actually declared. */
3937 if (name
[0] != '_' || name
[1] != '_')
3938 DECL_ANTICIPATED (decl
) = 1;
3939 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3941 size_t len
= strlen (name
);
3943 /* Treat __*_chk fortification functions as anticipated as well,
3944 unless they are __builtin_*. */
3945 if (len
> strlen ("___chk")
3946 && memcmp (name
+ len
- strlen ("_chk"),
3947 "_chk", strlen ("_chk") + 1) == 0)
3948 DECL_ANTICIPATED (decl
) = 1;
3955 cxx_builtin_function (tree decl
)
3957 tree id
= DECL_NAME (decl
);
3958 const char *name
= IDENTIFIER_POINTER (id
);
3959 /* All builtins that don't begin with an '_' should additionally
3960 go in the 'std' namespace. */
3963 tree decl2
= copy_node(decl
);
3964 push_namespace (std_identifier
);
3965 builtin_function_1 (decl2
, std_node
, false);
3969 return builtin_function_1 (decl
, NULL_TREE
, false);
3972 /* Like cxx_builtin_function, but guarantee the function is added to the global
3973 scope. This is to allow function specific options to add new machine
3974 dependent builtins when the target ISA changes via attribute((target(...)))
3975 which saves space on program startup if the program does not use non-generic
3979 cxx_builtin_function_ext_scope (tree decl
)
3982 tree id
= DECL_NAME (decl
);
3983 const char *name
= IDENTIFIER_POINTER (id
);
3984 /* All builtins that don't begin with an '_' should additionally
3985 go in the 'std' namespace. */
3988 tree decl2
= copy_node(decl
);
3989 push_namespace (std_identifier
);
3990 builtin_function_1 (decl2
, std_node
, true);
3994 return builtin_function_1 (decl
, NULL_TREE
, true);
3997 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3998 function. Not called directly. */
4001 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
4003 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4004 DECL_EXTERNAL (fn
) = 1;
4005 TREE_PUBLIC (fn
) = 1;
4006 DECL_ARTIFICIAL (fn
) = 1;
4007 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4008 SET_DECL_LANGUAGE (fn
, lang_c
);
4009 /* Runtime library routines are, by definition, available in an
4010 external shared object. */
4011 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4012 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4016 /* Returns the _DECL for a library function with C linkage.
4017 We assume that such functions never throw; if this is incorrect,
4018 callers should unset TREE_NOTHROW. */
4021 build_library_fn (tree name
, tree type
)
4023 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
4024 TREE_NOTHROW (fn
) = 1;
4028 /* Returns the _DECL for a library function with C++ linkage. */
4031 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
4033 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
4034 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
4035 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4036 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4040 /* Like build_library_fn, but takes a C string instead of an
4044 build_library_fn_ptr (const char* name
, tree type
)
4046 return build_library_fn (get_identifier (name
), type
);
4049 /* Like build_cp_library_fn, but takes a C string instead of an
4053 build_cp_library_fn_ptr (const char* name
, tree type
)
4055 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
4058 /* Like build_library_fn, but also pushes the function so that we will
4059 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4060 may throw exceptions listed in RAISES. */
4063 push_library_fn (tree name
, tree type
, tree raises
)
4068 type
= build_exception_variant (type
, raises
);
4070 fn
= build_library_fn (name
, type
);
4071 pushdecl_top_level (fn
);
4075 /* Like build_cp_library_fn, but also pushes the function so that it
4076 will be found by normal lookup. */
4079 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4081 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4086 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4090 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4094 push_void_library_fn (tree name
, tree parmtypes
)
4096 tree type
= build_function_type (void_type_node
, parmtypes
);
4097 return push_library_fn (name
, type
, NULL_TREE
);
4100 /* Like push_library_fn, but also note that this function throws
4101 and does not return. Used for __throw_foo and the like. */
4104 push_throw_library_fn (tree name
, tree type
)
4106 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4107 TREE_THIS_VOLATILE (fn
) = 1;
4108 TREE_NOTHROW (fn
) = 0;
4112 /* When we call finish_struct for an anonymous union, we create
4113 default copy constructors and such. But, an anonymous union
4114 shouldn't have such things; this function undoes the damage to the
4115 anonymous union type T.
4117 (The reason that we create the synthesized methods is that we don't
4118 distinguish `union { int i; }' from `typedef union { int i; } U'.
4119 The first is an anonymous union; the second is just an ordinary
4123 fixup_anonymous_aggr (tree t
)
4127 /* Wipe out memory of synthesized methods. */
4128 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4129 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4130 TYPE_HAS_COPY_CTOR (t
) = 0;
4131 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4132 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4133 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4135 /* Splice the implicitly generated functions out of the TYPE_METHODS
4137 q
= &TYPE_METHODS (t
);
4140 if (DECL_ARTIFICIAL (*q
))
4141 *q
= TREE_CHAIN (*q
);
4143 q
= &DECL_CHAIN (*q
);
4146 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4147 if (TYPE_METHODS (t
))
4149 tree decl
= TYPE_MAIN_DECL (t
);
4151 if (TREE_CODE (t
) != UNION_TYPE
)
4152 error_at (DECL_SOURCE_LOCATION (decl
),
4153 "an anonymous struct cannot have function members");
4155 error_at (DECL_SOURCE_LOCATION (decl
),
4156 "an anonymous union cannot have function members");
4159 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4160 assignment operators (because they cannot have these methods themselves).
4161 For anonymous unions this is already checked because they are not allowed
4162 in any union, otherwise we have to check it. */
4163 if (TREE_CODE (t
) != UNION_TYPE
)
4167 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4168 if (TREE_CODE (field
) == FIELD_DECL
)
4170 type
= TREE_TYPE (field
);
4171 if (CLASS_TYPE_P (type
))
4173 if (TYPE_NEEDS_CONSTRUCTING (type
))
4174 error ("member %q+#D with constructor not allowed "
4175 "in anonymous aggregate", field
);
4176 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4177 error ("member %q+#D with destructor not allowed "
4178 "in anonymous aggregate", field
);
4179 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4180 error ("member %q+#D with copy assignment operator "
4181 "not allowed in anonymous aggregate", field
);
4187 /* Warn for an attribute located at LOCATION that appertains to the
4188 class type CLASS_TYPE that has not been properly placed after its
4189 class-key, in it class-specifier. */
4192 warn_misplaced_attr_for_class_type (source_location location
,
4195 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4197 warning_at (location
, OPT_Wattributes
,
4198 "attribute ignored in declaration "
4199 "of %q#T", class_type
);
4201 "attribute for %q#T must follow the %qs keyword",
4202 class_type
, class_key_or_enum_as_string (class_type
));
4205 /* Make sure that a declaration with no declarator is well-formed, i.e.
4206 just declares a tagged type or anonymous union.
4208 Returns the type declared; or NULL_TREE if none. */
4211 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4212 bool explicit_type_instantiation_p
)
4214 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4215 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4216 /* If a class, struct, or enum type is declared by the DECLSPECS
4217 (i.e, if a class-specifier, enum-specifier, or non-typename
4218 elaborated-type-specifier appears in the DECLSPECS),
4219 DECLARED_TYPE is set to the corresponding type. */
4220 tree declared_type
= NULL_TREE
;
4221 bool error_p
= false;
4223 if (declspecs
->multiple_types_p
)
4224 error ("multiple types in one declaration");
4225 else if (declspecs
->redefined_builtin_type
)
4227 if (!in_system_header
)
4228 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4229 "redeclaration of C++ built-in type %qT",
4230 declspecs
->redefined_builtin_type
);
4235 && TYPE_P (declspecs
->type
)
4236 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4237 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4238 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4239 declared_type
= declspecs
->type
;
4240 else if (declspecs
->type
== error_mark_node
)
4242 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4243 permerror (input_location
, "declaration does not declare anything");
4244 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4246 error ("%<auto%> can only be specified for variables "
4247 "or function declarations");
4248 return error_mark_node
;
4250 /* Check for an anonymous union. */
4251 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4252 && TYPE_ANONYMOUS_P (declared_type
))
4254 /* 7/3 In a simple-declaration, the optional init-declarator-list
4255 can be omitted only when declaring a class (clause 9) or
4256 enumeration (7.2), that is, when the decl-specifier-seq contains
4257 either a class-specifier, an elaborated-type-specifier with
4258 a class-key (9.1), or an enum-specifier. In these cases and
4259 whenever a class-specifier or enum-specifier is present in the
4260 decl-specifier-seq, the identifiers in these specifiers are among
4261 the names being declared by the declaration (as class-name,
4262 enum-names, or enumerators, depending on the syntax). In such
4263 cases, and except for the declaration of an unnamed bit-field (9.6),
4264 the decl-specifier-seq shall introduce one or more names into the
4265 program, or shall redeclare a name introduced by a previous
4266 declaration. [Example:
4267 enum { }; // ill-formed
4268 typedef class { }; // ill-formed
4272 error ("missing type-name in typedef-declaration");
4275 /* Anonymous unions are objects, so they can have specifiers. */;
4276 SET_ANON_AGGR_TYPE_P (declared_type
);
4278 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4279 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4284 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4285 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4286 error ("%qs can only be specified for functions",
4287 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4288 ? "inline" : "virtual");
4290 && (!current_class_type
4291 || current_scope () != current_class_type
))
4292 error ("%<friend%> can only be specified inside a class");
4293 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4294 error ("%<explicit%> can only be specified for constructors");
4295 else if (declspecs
->storage_class
)
4296 error ("a storage class can only be specified for objects "
4298 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4299 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4300 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4301 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4302 error ("qualifiers can only be specified for objects "
4304 else if (saw_typedef
)
4305 warning (0, "%<typedef%> was ignored in this declaration");
4306 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4307 error ("%<constexpr%> cannot be used for type declarations");
4310 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4313 if (!CLASS_TYPE_P (declared_type
)
4314 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4315 /* For a non-template class, use the name location. */
4316 loc
= location_of (declared_type
);
4318 /* For a template class (an explicit instantiation), use the
4319 current location. */
4320 loc
= input_location
;
4322 if (explicit_type_instantiation_p
)
4323 /* [dcl.attr.grammar]/4:
4325 No attribute-specifier-seq shall appertain to an explicit
4328 warning_at (loc
, OPT_Wattributes
,
4329 "attribute ignored in explicit instantiation %q#T",
4332 "no attribute can be applied to "
4333 "an explicit instantiation");
4336 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4339 return declared_type
;
4342 /* Called when a declaration is seen that contains no names to declare.
4343 If its type is a reference to a structure, union or enum inherited
4344 from a containing scope, shadow that tag name for the current scope
4345 with a forward reference.
4346 If its type defines a new named structure or union
4347 or defines an enum, it is valid but we need not do anything here.
4348 Otherwise, it is an error.
4350 C++: may have to grok the declspecs to learn about static,
4351 complain for anonymous unions.
4353 Returns the TYPE declared -- or NULL_TREE if none. */
4356 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4358 tree t
= check_tag_decl (declspecs
,
4359 /*explicit_type_instantiation_p=*/false);
4364 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4367 /* This is where the variables in an anonymous union are
4368 declared. An anonymous union declaration looks like:
4370 because there is no declarator after the union, the parser
4371 sends that declaration here. */
4372 if (ANON_AGGR_TYPE_P (t
))
4374 fixup_anonymous_aggr (t
);
4376 if (TYPE_FIELDS (t
))
4378 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4379 declspecs
, NORMAL
, 0, NULL
);
4380 finish_anon_union (decl
);
4387 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4390 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4391 const cp_declarator
*declarator
,
4392 bool is_template_arg
)
4396 enum decl_context context
4397 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4398 attrs
= type_specifiers
->attributes
;
4399 type_specifiers
->attributes
= NULL_TREE
;
4400 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4401 if (attrs
&& type
!= error_mark_node
)
4403 if (CLASS_TYPE_P (type
))
4404 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4405 "outside of definition", type
);
4406 else if (MAYBE_CLASS_TYPE_P (type
))
4407 /* A template type parameter or other dependent type. */
4408 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4409 "type %qT without an associated declaration", type
);
4411 cplus_decl_attributes (&type
, attrs
, 0);
4416 /* Process a DECLARATOR for a function-scope variable declaration,
4417 namespace-scope variable declaration, or function declaration.
4418 (Function definitions go through start_function; class member
4419 declarations appearing in the body of the class go through
4420 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4421 If an error occurs, the error_mark_node is returned instead.
4423 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4424 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4425 for an explicitly defaulted function, or SD_DELETED for an explicitly
4426 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4427 implicitly initialized via a default constructor. ATTRIBUTES and
4428 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4430 The scope represented by the context of the returned DECL is pushed
4431 (if it is not the global namespace) and is assigned to
4432 *PUSHED_SCOPE_P. The caller is then responsible for calling
4433 pop_scope on *PUSHED_SCOPE_P if it is set. */
4436 start_decl (const cp_declarator
*declarator
,
4437 cp_decl_specifier_seq
*declspecs
,
4440 tree prefix_attributes
,
4441 tree
*pushed_scope_p
)
4449 *pushed_scope_p
= NULL_TREE
;
4451 /* An object declared as __attribute__((deprecated)) suppresses
4452 warnings of uses of other deprecated items. */
4453 if (lookup_attribute ("deprecated", attributes
))
4454 deprecated_state
= DEPRECATED_SUPPRESS
;
4456 attributes
= chainon (attributes
, prefix_attributes
);
4458 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4461 deprecated_state
= DEPRECATED_NORMAL
;
4463 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4464 || decl
== error_mark_node
)
4465 return error_mark_node
;
4467 context
= CP_DECL_CONTEXT (decl
);
4468 if (context
!= global_namespace
)
4469 *pushed_scope_p
= push_scope (context
);
4472 /* Is it valid for this decl to have an initializer at all?
4473 If not, set INITIALIZED to zero, which will indirectly
4474 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4475 switch (TREE_CODE (decl
))
4478 error ("typedef %qD is initialized (use decltype instead)", decl
);
4479 return error_mark_node
;
4482 if (initialized
== SD_DELETED
)
4483 /* We'll handle the rest of the semantics later, but we need to
4484 set this now so it's visible to duplicate_decls. */
4485 DECL_DELETED_FN (decl
) = 1;
4494 if (! toplevel_bindings_p ()
4495 && DECL_EXTERNAL (decl
))
4496 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4498 DECL_EXTERNAL (decl
) = 0;
4499 if (toplevel_bindings_p ())
4500 TREE_STATIC (decl
) = 1;
4502 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4504 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4505 record_key_method_defined (decl
);
4507 /* If this is a typedef that names the class for linkage purposes
4508 (7.1.3p8), apply any attributes directly to the type. */
4509 if (TREE_CODE (decl
) == TYPE_DECL
4510 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4511 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4512 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4516 /* Set attributes here so if duplicate decl, will have proper attributes. */
4517 cplus_decl_attributes (&decl
, attributes
, flags
);
4519 /* Dllimported symbols cannot be defined. Static data members (which
4520 can be initialized in-class and dllimported) go through grokfield,
4521 not here, so we don't need to exclude those decls when checking for
4523 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4525 error ("definition of %q#D is marked %<dllimport%>", decl
);
4526 DECL_DLLIMPORT_P (decl
) = 0;
4529 /* If #pragma weak was used, mark the decl weak now. */
4530 if (!processing_template_decl
)
4531 maybe_apply_pragma_weak (decl
);
4533 if (TREE_CODE (decl
) == FUNCTION_DECL
4534 && DECL_DECLARED_INLINE_P (decl
)
4535 && DECL_UNINLINABLE (decl
)
4536 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4537 warning (0, "inline function %q+D given attribute noinline", decl
);
4539 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4543 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4544 if (field
== NULL_TREE
|| !VAR_P (field
))
4545 error ("%q#D is not a static member of %q#T", decl
, context
);
4548 if (DECL_CONTEXT (field
) != context
)
4550 if (!same_type_p (DECL_CONTEXT (field
), context
))
4551 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4552 "to be defined as %<%T::%D%>",
4553 DECL_CONTEXT (field
), DECL_NAME (decl
),
4554 context
, DECL_NAME (decl
));
4555 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4557 /* Static data member are tricky; an in-class initialization
4558 still doesn't provide a definition, so the in-class
4559 declaration will have DECL_EXTERNAL set, but will have an
4560 initialization. Thus, duplicate_decls won't warn
4561 about this situation, and so we check here. */
4562 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4563 error ("duplicate initialization of %qD", decl
);
4564 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4566 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4567 && !DECL_DECLARED_CONSTEXPR_P (field
))
4568 error ("%qD declared %<constexpr%> outside its class", field
);
4573 tree field
= check_classfn (context
, decl
,
4574 (processing_template_decl
4575 > template_class_depth (context
))
4576 ? current_template_parms
4578 if (field
&& field
!= error_mark_node
4579 && duplicate_decls (decl
, field
,
4580 /*newdecl_is_friend=*/false))
4584 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4585 DECL_IN_AGGR_P (decl
) = 0;
4586 /* Do not mark DECL as an explicit specialization if it was not
4587 already marked as an instantiation; a declaration should
4588 never be marked as a specialization unless we know what
4589 template is being specialized. */
4590 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4592 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4594 /* [temp.expl.spec] An explicit specialization of a static data
4595 member of a template is a definition if the declaration
4596 includes an initializer; otherwise, it is a declaration.
4598 We check for processing_specialization so this only applies
4599 to the new specialization syntax. */
4600 if (!initialized
&& processing_specialization
)
4601 DECL_EXTERNAL (decl
) = 1;
4604 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4605 /* Aliases are definitions. */
4607 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4611 was_public
= TREE_PUBLIC (decl
);
4613 /* Enter this declaration into the symbol table. */
4614 decl
= maybe_push_decl (decl
);
4616 if (processing_template_decl
)
4617 decl
= push_template_decl (decl
);
4618 if (decl
== error_mark_node
)
4619 return error_mark_node
;
4622 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4623 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4625 /* This is a const variable with implicit 'static'. Set
4626 DECL_THIS_STATIC so we can tell it from variables that are
4627 !TREE_PUBLIC because of the anonymous namespace. */
4628 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4629 DECL_THIS_STATIC (decl
) = 1;
4632 if (!processing_template_decl
&& VAR_P (decl
))
4633 start_decl_1 (decl
, initialized
);
4638 /* Process the declaration of a variable DECL. INITIALIZED is true
4639 iff DECL is explicitly initialized. (INITIALIZED is false if the
4640 variable is initialized via an implicitly-called constructor.)
4641 This function must be called for ordinary variables (including, for
4642 example, implicit instantiations of templates), but must not be
4643 called for template declarations. */
4646 start_decl_1 (tree decl
, bool initialized
)
4650 bool aggregate_definition_p
;
4652 gcc_assert (!processing_template_decl
);
4654 if (error_operand_p (decl
))
4657 gcc_assert (VAR_P (decl
));
4659 type
= TREE_TYPE (decl
);
4660 complete_p
= COMPLETE_TYPE_P (type
);
4661 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4663 /* If an explicit initializer is present, or if this is a definition
4664 of an aggregate, then we need a complete type at this point.
4665 (Scalars are always complete types, so there is nothing to
4666 check.) This code just sets COMPLETE_P; errors (if necessary)
4667 are issued below. */
4668 if ((initialized
|| aggregate_definition_p
)
4670 && COMPLETE_TYPE_P (complete_type (type
)))
4673 /* We will not yet have set TREE_READONLY on DECL if the type
4674 was "const", but incomplete, before this point. But, now, we
4675 have a complete type, so we can try again. */
4676 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4680 /* Is it valid for this decl to have an initializer at all? */
4682 /* Don't allow initializations for incomplete types except for
4683 arrays which might be completed by the initialization. */
4685 ; /* A complete type is ok. */
4686 else if (type_uses_auto (type
))
4687 ; /* An auto type is ok. */
4688 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4690 error ("variable %q#D has initializer but incomplete type", decl
);
4691 type
= TREE_TYPE (decl
) = error_mark_node
;
4693 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4695 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4696 error ("elements of array %q#D have incomplete type", decl
);
4697 /* else we already gave an error in start_decl. */
4700 else if (aggregate_definition_p
&& !complete_p
)
4702 if (type_uses_auto (type
))
4703 error ("declaration of %q#D has no initializer", decl
);
4705 error ("aggregate %q#D has incomplete type and cannot be defined",
4707 /* Change the type so that assemble_variable will give
4708 DECL an rtl we can live with: (mem (const_int 0)). */
4709 type
= TREE_TYPE (decl
) = error_mark_node
;
4712 /* Create a new scope to hold this declaration if necessary.
4713 Whether or not a new scope is necessary cannot be determined
4714 until after the type has been completed; if the type is a
4715 specialization of a class template it is not until after
4716 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4717 will be set correctly. */
4718 maybe_push_cleanup_level (type
);
4721 /* Handle initialization of references. DECL, TYPE, and INIT have the
4722 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4723 but will be set to a new CLEANUP_STMT if a temporary is created
4724 that must be destroyed subsequently.
4726 Returns an initializer expression to use to initialize DECL, or
4727 NULL if the initialization can be performed statically.
4729 Quotes on semantics can be found in ARM 8.4.3. */
4732 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4734 if (init
== NULL_TREE
)
4736 if ((DECL_LANG_SPECIFIC (decl
) == 0
4737 || DECL_IN_AGGR_P (decl
) == 0)
4738 && ! DECL_THIS_EXTERN (decl
))
4739 error ("%qD declared as reference but not initialized", decl
);
4743 if (TREE_CODE (init
) == TREE_LIST
)
4744 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4745 tf_warning_or_error
);
4747 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4748 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4749 /* Note: default conversion is only called in very special cases. */
4750 init
= decay_conversion (init
, tf_warning_or_error
);
4752 /* Convert INIT to the reference type TYPE. This may involve the
4753 creation of a temporary, whose lifetime must be the same as that
4754 of the reference. If so, a DECL_EXPR for the temporary will be
4755 added just after the DECL_EXPR for DECL. That's why we don't set
4756 DECL_INITIAL for local references (instead assigning to them
4757 explicitly); we need to allow the temporary to be initialized
4759 return initialize_reference (type
, init
, flags
,
4760 tf_warning_or_error
);
4763 /* Designated initializers in arrays are not supported in GNU C++.
4764 The parser cannot detect this error since it does not know whether
4765 a given brace-enclosed initializer is for a class type or for an
4766 array. This function checks that CE does not use a designated
4767 initializer. If it does, an error is issued. Returns true if CE
4768 is valid, i.e., does not have a designated initializer. */
4771 check_array_designated_initializer (constructor_elt
*ce
,
4772 unsigned HOST_WIDE_INT index
)
4774 /* Designated initializers for array elements are not supported. */
4777 /* The parser only allows identifiers as designated
4779 if (ce
->index
== error_mark_node
)
4781 error ("name used in a GNU-style designated "
4782 "initializer for an array");
4785 else if (identifier_p (ce
->index
))
4787 error ("name %qD used in a GNU-style designated "
4788 "initializer for an array", ce
->index
);
4792 ce
->index
= cxx_constant_value (ce
->index
);
4794 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4796 /* A C99 designator is OK if it matches the current index. */
4797 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4800 sorry ("non-trivial designated initializers not supported");
4811 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4812 array until we finish parsing the initializer. If that's the
4813 situation we're in, update DECL accordingly. */
4816 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4818 tree type
= TREE_TYPE (decl
);
4820 if (TREE_CODE (type
) == ARRAY_TYPE
4821 && TYPE_DOMAIN (type
) == NULL_TREE
4822 && TREE_CODE (decl
) != TYPE_DECL
)
4824 /* do_default is really a C-ism to deal with tentative definitions.
4825 But let's leave it here to ease the eventual merge. */
4826 int do_default
= !DECL_EXTERNAL (decl
);
4827 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4830 /* Check that there are no designated initializers in INIT, as
4831 those are not supported in GNU C++, and as the middle-end
4832 will crash if presented with a non-numeric designated
4834 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4836 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4837 constructor_elt
*ce
;
4839 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4840 if (!check_array_designated_initializer (ce
, i
))
4846 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4850 error ("initializer fails to determine size of %qD", decl
);
4852 else if (failure
== 2)
4856 error ("array size missing in %qD", decl
);
4858 /* If a `static' var's size isn't known, make it extern as
4859 well as static, so it does not get allocated. If it's not
4860 `static', then don't mark it extern; finish_incomplete_decl
4861 will give it a default size and it will get allocated. */
4862 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4863 DECL_EXTERNAL (decl
) = 1;
4865 else if (failure
== 3)
4867 error ("zero-size array %qD", decl
);
4871 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4873 relayout_decl (decl
);
4877 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4878 any appropriate error messages regarding the layout. */
4881 layout_var_decl (tree decl
)
4885 type
= TREE_TYPE (decl
);
4886 if (type
== error_mark_node
)
4889 /* If we haven't already layed out this declaration, do so now.
4890 Note that we must not call complete type for an external object
4891 because it's type might involve templates that we are not
4892 supposed to instantiate yet. (And it's perfectly valid to say
4893 `extern X x' for some incomplete type `X'.) */
4894 if (!DECL_EXTERNAL (decl
))
4895 complete_type (type
);
4896 if (!DECL_SIZE (decl
)
4897 && TREE_TYPE (decl
) != error_mark_node
4898 && (COMPLETE_TYPE_P (type
)
4899 || (TREE_CODE (type
) == ARRAY_TYPE
4900 && !TYPE_DOMAIN (type
)
4901 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4902 layout_decl (decl
, 0);
4904 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4906 /* An automatic variable with an incomplete type: that is an error.
4907 Don't talk about array types here, since we took care of that
4908 message in grokdeclarator. */
4909 error ("storage size of %qD isn%'t known", decl
);
4910 TREE_TYPE (decl
) = error_mark_node
;
4913 /* Keep this code around in case we later want to control debug info
4914 based on whether a type is "used". (jason 1999-11-11) */
4916 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4917 /* Let debugger know it should output info for this type. */
4918 note_debug_info_needed (ttype
);
4920 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4921 note_debug_info_needed (DECL_CONTEXT (decl
));
4924 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4925 && DECL_SIZE (decl
) != NULL_TREE
4926 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4928 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4929 constant_expression_warning (DECL_SIZE (decl
));
4932 error ("storage size of %qD isn%'t constant", decl
);
4933 TREE_TYPE (decl
) = error_mark_node
;
4938 /* If a local static variable is declared in an inline function, or if
4939 we have a weak definition, we must endeavor to create only one
4940 instance of the variable at link-time. */
4943 maybe_commonize_var (tree decl
)
4945 /* Static data in a function with comdat linkage also has comdat
4947 if (TREE_STATIC (decl
)
4948 /* Don't mess with __FUNCTION__. */
4949 && ! DECL_ARTIFICIAL (decl
)
4950 && DECL_FUNCTION_SCOPE_P (decl
)
4951 && vague_linkage_p (DECL_CONTEXT (decl
)))
4955 /* With weak symbols, we simply make the variable COMDAT;
4956 that will cause copies in multiple translations units to
4958 comdat_linkage (decl
);
4962 if (DECL_INITIAL (decl
) == NULL_TREE
4963 || DECL_INITIAL (decl
) == error_mark_node
)
4965 /* Without weak symbols, we can use COMMON to merge
4966 uninitialized variables. */
4967 TREE_PUBLIC (decl
) = 1;
4968 DECL_COMMON (decl
) = 1;
4972 /* While for initialized variables, we must use internal
4973 linkage -- which means that multiple copies will not
4975 TREE_PUBLIC (decl
) = 0;
4976 DECL_COMMON (decl
) = 0;
4977 warning_at (input_location
, 0,
4978 "sorry: semantics of inline function static "
4979 "data %q+#D are wrong (you%'ll wind up "
4980 "with multiple copies)", decl
);
4981 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4982 " you can work around this by removing "
4987 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4988 /* Set it up again; we might have set DECL_INITIAL since the last
4990 comdat_linkage (decl
);
4993 /* Issue an error message if DECL is an uninitialized const variable. */
4996 check_for_uninitialized_const_var (tree decl
)
4998 tree type
= strip_array_types (TREE_TYPE (decl
));
5000 /* ``Unless explicitly declared extern, a const object does not have
5001 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5004 && TREE_CODE (type
) != REFERENCE_TYPE
5005 && CP_TYPE_CONST_P (type
)
5006 && !DECL_INITIAL (decl
))
5008 tree field
= default_init_uninitialized_part (type
);
5012 permerror (DECL_SOURCE_LOCATION (decl
),
5013 "uninitialized const %qD", decl
);
5015 if (CLASS_TYPE_P (type
))
5017 tree defaulted_ctor
;
5019 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5020 "%q#T has no user-provided default constructor", type
);
5021 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5023 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5024 "constructor is not user-provided because it is "
5025 "explicitly defaulted in the class body");
5026 inform (0, "and the implicitly-defined constructor does not "
5027 "initialize %q+#D", field
);
5032 /* Structure holding the current initializer being processed by reshape_init.
5033 CUR is a pointer to the current element being processed, END is a pointer
5034 after the last element present in the initializer. */
5035 typedef struct reshape_iterator_t
5037 constructor_elt
*cur
;
5038 constructor_elt
*end
;
5041 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5043 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5044 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5045 initialized. If there are no more such fields, the return value
5049 next_initializable_field (tree field
)
5052 && (TREE_CODE (field
) != FIELD_DECL
5053 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5054 || DECL_ARTIFICIAL (field
)))
5055 field
= DECL_CHAIN (field
);
5060 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5061 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5062 INTEGER_CST representing the size of the array minus one (the maximum index),
5063 or NULL_TREE if the array was declared without specifying the size. D is
5064 the iterator within the constructor. */
5067 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5068 tsubst_flags_t complain
)
5071 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5072 unsigned HOST_WIDE_INT max_index_cst
= 0;
5073 unsigned HOST_WIDE_INT index
;
5075 /* The initializer for an array is always a CONSTRUCTOR. */
5076 new_init
= build_constructor (init_list_type_node
, NULL
);
5080 /* Minus 1 is used for zero sized arrays. */
5081 if (integer_all_onesp (max_index
))
5084 if (host_integerp (max_index
, 1))
5085 max_index_cst
= tree_low_cst (max_index
, 1);
5086 /* sizetype is sign extended, not zero extended. */
5088 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5092 /* Loop until there are no more initializers. */
5094 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5098 constructor_elt
*old_cur
= d
->cur
;
5100 check_array_designated_initializer (d
->cur
, index
);
5101 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5103 if (elt_init
== error_mark_node
)
5104 return error_mark_node
;
5105 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5106 size_int (index
), elt_init
);
5107 if (!TREE_CONSTANT (elt_init
))
5108 TREE_CONSTANT (new_init
) = false;
5110 /* This can happen with an invalid initializer (c++/54501). */
5111 if (d
->cur
== old_cur
&& !sized_array_p
)
5118 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5119 Parameters are the same of reshape_init_r. */
5122 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5124 tree max_index
= NULL_TREE
;
5126 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5128 if (TYPE_DOMAIN (type
))
5129 max_index
= array_type_nelts (type
);
5131 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5134 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5135 Parameters are the same of reshape_init_r. */
5138 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5140 tree max_index
= NULL_TREE
;
5142 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5144 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5146 tree value
= d
->cur
->value
;
5147 if (!same_type_p (TREE_TYPE (value
), type
))
5149 if (complain
& tf_error
)
5150 error ("invalid type %qT as initializer for a vector of type %qT",
5151 TREE_TYPE (d
->cur
->value
), type
);
5152 value
= error_mark_node
;
5158 /* For a vector, we initialize it as an array of the appropriate size. */
5159 if (TREE_CODE (type
) == VECTOR_TYPE
)
5160 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5162 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5165 /* Subroutine of reshape_init_r, processes the initializers for classes
5166 or union. Parameters are the same of reshape_init_r. */
5169 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5170 tsubst_flags_t complain
)
5175 gcc_assert (CLASS_TYPE_P (type
));
5177 /* The initializer for a class is always a CONSTRUCTOR. */
5178 new_init
= build_constructor (init_list_type_node
, NULL
);
5179 field
= next_initializable_field (TYPE_FIELDS (type
));
5185 An initializer for an aggregate member that is an
5186 empty class shall have the form of an empty
5187 initializer-list {}. */
5188 if (!first_initializer_p
)
5190 if (complain
& tf_error
)
5191 error ("initializer for %qT must be brace-enclosed", type
);
5192 return error_mark_node
;
5197 /* Loop through the initializable fields, gathering initializers. */
5198 while (d
->cur
!= d
->end
)
5201 constructor_elt
*old_cur
= d
->cur
;
5203 /* Handle designated initializers, as an extension. */
5206 if (d
->cur
->index
== error_mark_node
)
5207 return error_mark_node
;
5209 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5211 if (complain
& tf_error
)
5212 error ("%<[%E] =%> used in a GNU-style designated initializer"
5213 " for class %qT", d
->cur
->index
, type
);
5214 return error_mark_node
;
5217 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5218 /* We already reshaped this. */
5219 gcc_assert (d
->cur
->index
== field
);
5221 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5223 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5225 if (complain
& tf_error
)
5226 error ("%qT has no non-static data member named %qD", type
,
5228 return error_mark_node
;
5232 /* If we processed all the member of the class, we are done. */
5236 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5237 /*first_initializer_p=*/false, complain
);
5238 if (field_init
== error_mark_node
)
5239 return error_mark_node
;
5241 if (d
->cur
== old_cur
&& d
->cur
->index
)
5243 /* This can happen with an invalid initializer for a flexible
5244 array member (c++/54441). */
5245 if (complain
& tf_error
)
5246 error ("invalid initializer for %q#D", field
);
5247 return error_mark_node
;
5250 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5254 When a union is initialized with a brace-enclosed
5255 initializer, the braces shall only contain an
5256 initializer for the first member of the union. */
5257 if (TREE_CODE (type
) == UNION_TYPE
)
5260 field
= next_initializable_field (DECL_CHAIN (field
));
5266 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5267 designators are not valid; either complain or return true to indicate
5268 that reshape_init_r should return error_mark_node. */
5271 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5275 if (complain
& tf_error
)
5276 error ("C99 designator %qE outside aggregate initializer",
5284 /* Subroutine of reshape_init, which processes a single initializer (part of
5285 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5286 iterator within the CONSTRUCTOR which points to the initializer to process.
5287 FIRST_INITIALIZER_P is true if this is the first initializer of the
5288 outermost CONSTRUCTOR node. */
5291 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5292 tsubst_flags_t complain
)
5294 tree init
= d
->cur
->value
;
5296 if (error_operand_p (init
))
5297 return error_mark_node
;
5299 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5300 && has_designator_problem (d
, complain
))
5301 return error_mark_node
;
5303 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5305 /* A complex type can be initialized from one or two initializers,
5306 but braces are not elided. */
5308 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5310 if (CONSTRUCTOR_NELTS (init
) > 2)
5312 if (complain
& tf_error
)
5313 error ("too many initializers for %qT", type
);
5315 return error_mark_node
;
5318 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5320 vec
<constructor_elt
, va_gc
> *v
= 0;
5321 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5322 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5323 if (has_designator_problem (d
, complain
))
5324 return error_mark_node
;
5326 init
= build_constructor (init_list_type_node
, v
);
5331 /* A non-aggregate type is always initialized with a single
5333 if (!CP_AGGREGATE_TYPE_P (type
))
5335 /* It is invalid to initialize a non-aggregate type with a
5336 brace-enclosed initializer before C++0x.
5337 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5338 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5339 a CONSTRUCTOR (with a record type). */
5340 if (TREE_CODE (init
) == CONSTRUCTOR
5341 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5343 if (SCALAR_TYPE_P (type
))
5345 if (complain
& tf_error
)
5346 error ("braces around scalar initializer for type %qT", type
);
5347 init
= error_mark_node
;
5350 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5359 All implicit type conversions (clause _conv_) are considered when
5360 initializing the aggregate member with an initializer from an
5361 initializer-list. If the initializer can initialize a member,
5362 the member is initialized. Otherwise, if the member is itself a
5363 non-empty subaggregate, brace elision is assumed and the
5364 initializer is considered for the initialization of the first
5365 member of the subaggregate. */
5366 if (TREE_CODE (init
) != CONSTRUCTOR
5367 /* But don't try this for the first initializer, since that would be
5368 looking through the outermost braces; A a2 = { a1 }; is not a
5369 valid aggregate initialization. */
5370 && !first_initializer_p
5371 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5372 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5379 /* [dcl.init.string]
5381 A char array (whether plain char, signed char, or unsigned char)
5382 can be initialized by a string-literal (optionally enclosed in
5383 braces); a wchar_t array can be initialized by a wide
5384 string-literal (optionally enclosed in braces). */
5385 if (TREE_CODE (type
) == ARRAY_TYPE
5386 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5388 tree str_init
= init
;
5390 /* Strip one level of braces if and only if they enclose a single
5391 element (as allowed by [dcl.init.string]). */
5392 if (!first_initializer_p
5393 && TREE_CODE (str_init
) == CONSTRUCTOR
5394 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5396 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5399 /* If it's a string literal, then it's the initializer for the array
5400 as a whole. Otherwise, continue with normal initialization for
5401 array types (one value per array element). */
5402 if (TREE_CODE (str_init
) == STRING_CST
)
5404 if (has_designator_problem (d
, complain
))
5405 return error_mark_node
;
5411 /* The following cases are about aggregates. If we are not within a full
5412 initializer already, and there is not a CONSTRUCTOR, it means that there
5413 is a missing set of braces (that is, we are processing the case for
5414 which reshape_init exists). */
5415 if (!first_initializer_p
)
5417 if (TREE_CODE (init
) == CONSTRUCTOR
)
5419 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5420 /* There is no need to reshape pointer-to-member function
5421 initializers, as they are always constructed correctly
5422 by the front end. */
5424 else if (COMPOUND_LITERAL_P (init
))
5425 /* For a nested compound literal, there is no need to reshape since
5426 brace elision is not allowed. Even if we decided to allow it,
5427 we should add a call to reshape_init in finish_compound_literal,
5428 before calling digest_init, so changing this code would still
5429 not be necessary. */
5430 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5434 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5435 return reshape_init (type
, init
, complain
);
5439 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5443 /* Dispatch to specialized routines. */
5444 if (CLASS_TYPE_P (type
))
5445 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5446 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5447 return reshape_init_array (type
, d
, complain
);
5448 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5449 return reshape_init_vector (type
, d
, complain
);
5454 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5455 brace-enclosed aggregate initializer.
5457 INIT is the CONSTRUCTOR containing the list of initializers describing
5458 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5459 It may not presently match the shape of the TYPE; for example:
5461 struct S { int a; int b; };
5462 struct S a[] = { 1, 2, 3, 4 };
5464 Here INIT will hold a vector of four elements, rather than a
5465 vector of two elements, each itself a vector of two elements. This
5466 routine transforms INIT from the former form into the latter. The
5467 revised CONSTRUCTOR node is returned. */
5470 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5472 vec
<constructor_elt
, va_gc
> *v
;
5476 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5478 v
= CONSTRUCTOR_ELTS (init
);
5480 /* An empty constructor does not need reshaping, and it is always a valid
5482 if (vec_safe_is_empty (v
))
5485 /* Recurse on this CONSTRUCTOR. */
5487 d
.end
= d
.cur
+ v
->length ();
5489 new_init
= reshape_init_r (type
, &d
, true, complain
);
5490 if (new_init
== error_mark_node
)
5491 return error_mark_node
;
5493 /* Make sure all the element of the constructor were used. Otherwise,
5494 issue an error about exceeding initializers. */
5497 if (complain
& tf_error
)
5498 error ("too many initializers for %qT", type
);
5500 return error_mark_node
;
5506 /* Verify array initializer. Returns true if errors have been reported. */
5509 check_array_initializer (tree decl
, tree type
, tree init
)
5511 tree element_type
= TREE_TYPE (type
);
5513 /* The array type itself need not be complete, because the
5514 initializer may tell us how many elements are in the array.
5515 But, the elements of the array must be complete. */
5516 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5519 error ("elements of array %q#D have incomplete type", decl
);
5521 error ("elements of array %q#T have incomplete type", type
);
5524 /* A compound literal can't have variable size. */
5526 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5527 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5529 error ("variable-sized compound literal");
5535 /* Subroutine of check_initializer; args are passed down from that function.
5536 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5539 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5542 gcc_assert (stmts_are_full_exprs_p ());
5543 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5546 /* Verify INIT (the initializer for DECL), and record the
5547 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5548 grok_reference_init.
5550 If the return value is non-NULL, it is an expression that must be
5551 evaluated dynamically to initialize DECL. */
5554 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5556 tree type
= TREE_TYPE (decl
);
5557 tree init_code
= NULL
;
5558 tree extra_init
= NULL_TREE
;
5561 /* Things that are going to be initialized need to have complete
5563 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5565 if (DECL_HAS_VALUE_EXPR_P (decl
))
5567 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5568 it doesn't have storage to be initialized. */
5569 gcc_assert (init
== NULL_TREE
);
5573 if (type
== error_mark_node
)
5574 /* We will have already complained. */
5577 if (TREE_CODE (type
) == ARRAY_TYPE
)
5579 if (check_array_initializer (decl
, type
, init
))
5582 else if (!COMPLETE_TYPE_P (type
))
5584 error ("%q#D has incomplete type", decl
);
5585 TREE_TYPE (decl
) = error_mark_node
;
5589 /* There is no way to make a variable-sized class type in GNU C++. */
5590 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5592 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5594 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5595 if (SCALAR_TYPE_P (type
))
5599 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5600 init
= build_zero_init (type
, NULL_TREE
, false);
5602 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5604 error ("scalar object %qD requires one element in initializer",
5606 TREE_TYPE (decl
) = error_mark_node
;
5612 if (TREE_CODE (decl
) == CONST_DECL
)
5614 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5616 DECL_INITIAL (decl
) = init
;
5618 gcc_assert (init
!= NULL_TREE
);
5621 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5623 else if (init
|| type_build_ctor_call (type
)
5624 || TREE_CODE (type
) == REFERENCE_TYPE
)
5626 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5628 init
= grok_reference_init (decl
, type
, init
, flags
);
5629 flags
|= LOOKUP_ALREADY_DIGESTED
;
5632 check_for_uninitialized_const_var (decl
);
5633 /* Do not reshape constructors of vectors (they don't need to be
5635 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5637 if (is_std_init_list (type
))
5639 init
= perform_implicit_conversion (type
, init
,
5640 tf_warning_or_error
);
5641 flags
|= LOOKUP_ALREADY_DIGESTED
;
5643 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5645 /* Don't reshape if the class has constructors. */
5646 if (cxx_dialect
== cxx98
)
5647 error ("in C++98 %qD must be initialized by constructor, "
5651 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5653 error ("opaque vector types cannot be initialized");
5654 init
= error_mark_node
;
5658 init
= reshape_init (type
, init
, tf_warning_or_error
);
5659 if (SCALAR_TYPE_P (type
))
5660 check_narrowing (type
, init
);
5664 /* If DECL has an array type without a specific bound, deduce the
5665 array size from the initializer. */
5666 maybe_deduce_size_from_array_init (decl
, init
);
5667 type
= TREE_TYPE (decl
);
5668 if (type
== error_mark_node
)
5671 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5672 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5673 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5674 && CP_AGGREGATE_TYPE_P (type
)
5675 && (CLASS_TYPE_P (type
)
5676 || type_has_extended_temps (type
))))
5678 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5680 /* A constructor call is a non-trivial initializer even if
5681 it isn't explicitly written. */
5682 if (TREE_SIDE_EFFECTS (init_code
))
5683 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5685 /* If this is a constexpr initializer, expand_default_init will
5686 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5687 case, pull the initializer back out and pass it down into
5688 store_init_value. */
5689 while (TREE_CODE (init_code
) == EXPR_STMT
5690 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5691 init_code
= TREE_OPERAND (init_code
, 0);
5692 if (TREE_CODE (init_code
) == INIT_EXPR
)
5694 init
= TREE_OPERAND (init_code
, 1);
5695 init_code
= NULL_TREE
;
5696 /* Don't call digest_init; it's unnecessary and will complain
5697 about aggregate initialization of non-aggregate classes. */
5698 flags
|= LOOKUP_ALREADY_DIGESTED
;
5700 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5702 /* Declared constexpr, but no suitable initializer; massage
5703 init appropriately so we can pass it into store_init_value
5705 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5706 init
= finish_compound_literal (type
, init
,
5707 tf_warning_or_error
);
5708 else if (CLASS_TYPE_P (type
)
5709 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5711 init
= build_functional_cast (type
, init
, tf_none
);
5712 if (TREE_CODE (init
) == TARGET_EXPR
)
5713 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5715 init_code
= NULL_TREE
;
5721 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5723 /* In aggregate initialization of a variable, each element
5724 initialization is a full-expression because there is no
5725 enclosing expression. */
5726 gcc_assert (stmts_are_full_exprs_p ());
5728 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5730 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5731 && DECL_INITIAL (decl
)
5732 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5733 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5734 warning (0, "array %qD initialized by parenthesized string literal %qE",
5735 decl
, DECL_INITIAL (decl
));
5741 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5742 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5743 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5744 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5747 check_for_uninitialized_const_var (decl
);
5750 if (init
&& init
!= error_mark_node
)
5751 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5754 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5756 if (init_code
&& DECL_IN_AGGR_P (decl
))
5758 static int explained
= 0;
5760 if (cxx_dialect
< cxx11
)
5761 error ("initializer invalid for static member with constructor");
5763 error ("non-constant in-class initialization invalid for static "
5764 "member %qD", decl
);
5767 error ("(an out of class initialization is required)");
5775 /* If DECL is not a local variable, give it RTL. */
5778 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5780 int toplev
= toplevel_bindings_p ();
5782 const char *filename
;
5784 /* Set the DECL_ASSEMBLER_NAME for the object. */
5787 /* The `register' keyword, when used together with an
5788 asm-specification, indicates that the variable should be
5789 placed in a particular register. */
5790 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5792 set_user_assembler_name (decl
, asmspec
);
5793 DECL_HARD_REGISTER (decl
) = 1;
5797 if (TREE_CODE (decl
) == FUNCTION_DECL
5798 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5799 set_builtin_user_assembler_name (decl
, asmspec
);
5800 set_user_assembler_name (decl
, asmspec
);
5804 /* Handle non-variables up front. */
5807 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5811 /* If we see a class member here, it should be a static data
5813 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5815 gcc_assert (TREE_STATIC (decl
));
5816 /* An in-class declaration of a static data member should be
5817 external; it is only a declaration, and not a definition. */
5818 if (init
== NULL_TREE
)
5819 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5822 /* We don't create any RTL for local variables. */
5823 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5826 /* We defer emission of local statics until the corresponding
5827 DECL_EXPR is expanded. */
5828 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5830 /* We try to defer namespace-scope static constants so that they are
5831 not emitted into the object file unnecessarily. */
5832 filename
= input_filename
;
5833 if (!DECL_VIRTUAL_P (decl
)
5834 && TREE_READONLY (decl
)
5835 && DECL_INITIAL (decl
) != NULL_TREE
5836 && DECL_INITIAL (decl
) != error_mark_node
5838 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5840 && !TREE_PUBLIC (decl
))
5842 /* Fool with the linkage of static consts according to #pragma
5844 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5845 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5847 TREE_PUBLIC (decl
) = 1;
5848 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5853 /* Likewise for template instantiations. */
5854 else if (DECL_LANG_SPECIFIC (decl
)
5855 && DECL_IMPLICIT_INSTANTIATION (decl
))
5858 /* If we're not deferring, go ahead and assemble the variable. */
5860 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5863 /* walk_tree helper for wrap_temporary_cleanups, below. */
5866 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5868 /* Stop at types or full-expression boundaries. */
5869 if (TYPE_P (*stmt_p
)
5870 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5876 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5878 tree guard
= (tree
)data
;
5879 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5881 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5882 /* Tell honor_protect_cleanup_actions to handle this as a separate
5884 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5886 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5892 /* We're initializing a local variable which has a cleanup GUARD. If there
5893 are any temporaries used in the initializer INIT of this variable, we
5894 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5895 variable will be cleaned up properly if one of them throws.
5897 Unfortunately, there's no way to express this properly in terms of
5898 nesting, as the regions for the temporaries overlap the region for the
5899 variable itself; if there are two temporaries, the variable needs to be
5900 the first thing destroyed if either of them throws. However, we only
5901 want to run the variable's cleanup if it actually got constructed. So
5902 we need to guard the temporary cleanups with the variable's cleanup if
5903 they are run on the normal path, but not if they are run on the
5904 exceptional path. We implement this by telling
5905 honor_protect_cleanup_actions to strip the variable cleanup from the
5906 exceptional path. */
5909 wrap_temporary_cleanups (tree init
, tree guard
)
5911 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5914 /* Generate code to initialize DECL (a local variable). */
5917 initialize_local_var (tree decl
, tree init
)
5919 tree type
= TREE_TYPE (decl
);
5923 gcc_assert (VAR_P (decl
)
5924 || TREE_CODE (decl
) == RESULT_DECL
);
5925 gcc_assert (!TREE_STATIC (decl
));
5927 if (DECL_SIZE (decl
) == NULL_TREE
)
5929 /* If we used it already as memory, it must stay in memory. */
5930 DECL_INITIAL (decl
) = NULL_TREE
;
5931 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5935 if (type
== error_mark_node
)
5938 /* Compute and store the initial value. */
5939 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5940 if (TREE_USED (type
))
5941 DECL_READ_P (decl
) = 1;
5943 /* Generate a cleanup, if necessary. */
5944 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5946 /* Perform the initialization. */
5949 if (TREE_CODE (init
) == INIT_EXPR
5950 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5952 /* Stick simple initializers in DECL_INITIAL so that
5953 -Wno-init-self works (c++/34772). */
5954 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5955 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5959 int saved_stmts_are_full_exprs_p
;
5961 /* If we're only initializing a single object, guard the
5962 destructors of any temporaries used in its initializer with
5963 its destructor. This isn't right for arrays because each
5964 element initialization is a full-expression. */
5965 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5966 wrap_temporary_cleanups (init
, cleanup
);
5968 gcc_assert (building_stmt_list_p ());
5969 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5970 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5971 finish_expr_stmt (init
);
5972 current_stmt_tree ()->stmts_are_full_exprs_p
=
5973 saved_stmts_are_full_exprs_p
;
5977 /* Set this to 0 so we can tell whether an aggregate which was
5978 initialized was ever used. Don't do this if it has a
5979 destructor, so we don't complain about the 'resource
5980 allocation is initialization' idiom. Now set
5981 attribute((unused)) on types so decls of that type will be
5982 marked used. (see TREE_USED, above.) */
5983 if (TYPE_NEEDS_CONSTRUCTING (type
)
5985 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5986 && DECL_NAME (decl
))
5987 TREE_USED (decl
) = 0;
5988 else if (already_used
)
5989 TREE_USED (decl
) = 1;
5992 finish_decl_cleanup (decl
, cleanup
);
5995 /* DECL is a VAR_DECL for a compiler-generated variable with static
5996 storage duration (like a virtual table) whose initializer is a
5997 compile-time constant. Initialize the variable and provide it to the
6001 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6004 gcc_assert (DECL_ARTIFICIAL (decl
));
6005 init
= build_constructor (TREE_TYPE (decl
), v
);
6006 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6007 DECL_INITIAL (decl
) = init
;
6008 DECL_INITIALIZED_P (decl
) = 1;
6009 determine_visibility (decl
);
6010 layout_var_decl (decl
);
6011 maybe_commonize_var (decl
);
6012 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6015 /* INIT is the initializer for a variable, as represented by the
6016 parser. Returns true iff INIT is type-dependent. */
6019 type_dependent_init_p (tree init
)
6021 if (TREE_CODE (init
) == TREE_LIST
)
6022 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6023 return any_type_dependent_elements_p (init
);
6024 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6025 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6027 vec
<constructor_elt
, va_gc
> *elts
;
6031 elts
= CONSTRUCTOR_ELTS (init
);
6032 nelts
= vec_safe_length (elts
);
6033 for (i
= 0; i
< nelts
; ++i
)
6034 if (type_dependent_init_p ((*elts
)[i
].value
))
6038 /* It must be a simple expression, e.g., int i = 3; */
6039 return type_dependent_expression_p (init
);
6044 /* INIT is the initializer for a variable, as represented by the
6045 parser. Returns true iff INIT is value-dependent. */
6048 value_dependent_init_p (tree init
)
6050 if (TREE_CODE (init
) == TREE_LIST
)
6051 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6052 return any_value_dependent_elements_p (init
);
6053 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6054 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6056 vec
<constructor_elt
, va_gc
> *elts
;
6060 elts
= CONSTRUCTOR_ELTS (init
);
6061 nelts
= vec_safe_length (elts
);
6062 for (i
= 0; i
< nelts
; ++i
)
6063 if (value_dependent_init_p ((*elts
)[i
].value
))
6067 /* It must be a simple expression, e.g., int i = 3; */
6068 return value_dependent_expression_p (init
);
6073 /* Finish processing of a declaration;
6074 install its line number and initial value.
6075 If the length of an array type is not known before,
6076 it must be determined now, from the initial value, or it is an error.
6078 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6079 true, then INIT is an integral constant expression.
6081 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6082 if the (init) syntax was used. */
6085 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6086 tree asmspec_tree
, int flags
)
6089 vec
<tree
, va_gc
> *cleanups
= NULL
;
6090 const char *asmspec
= NULL
;
6091 int was_readonly
= 0;
6092 bool var_definition_p
= false;
6095 if (decl
== error_mark_node
)
6100 error ("assignment (not initialization) in declaration");
6104 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6105 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6106 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6108 type
= TREE_TYPE (decl
);
6109 if (type
== error_mark_node
)
6112 /* If a name was specified, get the string. */
6113 if (at_namespace_scope_p ())
6114 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6115 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6116 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6118 if (current_class_type
6119 && CP_DECL_CONTEXT (decl
) == current_class_type
6120 && TYPE_BEING_DEFINED (current_class_type
)
6121 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6122 && (DECL_INITIAL (decl
) || init
))
6123 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6125 if (TREE_CODE (decl
) != FUNCTION_DECL
6126 && (auto_node
= type_uses_auto (type
)))
6129 if (init
== NULL_TREE
)
6131 if (DECL_LANG_SPECIFIC (decl
)
6132 && DECL_TEMPLATE_INSTANTIATION (decl
)
6133 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6135 /* init is null because we're deferring instantiating the
6136 initializer until we need it. Well, we need it now. */
6137 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6141 error ("declaration of %q#D has no initializer", decl
);
6142 TREE_TYPE (decl
) = error_mark_node
;
6146 if (TREE_CODE (d_init
) == TREE_LIST
)
6147 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6148 tf_warning_or_error
);
6149 d_init
= resolve_nondeduced_context (d_init
);
6150 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6152 if (type
== error_mark_node
)
6154 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6157 if (!ensure_literal_type_for_constexpr_object (decl
))
6158 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6161 && DECL_CLASS_SCOPE_P (decl
)
6162 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6163 check_static_variable_definition (decl
, type
);
6165 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6168 if (init
== ridpointers
[(int)RID_DELETE
])
6170 /* FIXME check this is 1st decl. */
6171 DECL_DELETED_FN (decl
) = 1;
6172 DECL_DECLARED_INLINE_P (decl
) = 1;
6173 DECL_INITIAL (decl
) = error_mark_node
;
6174 FOR_EACH_CLONE (clone
, decl
)
6176 DECL_DELETED_FN (clone
) = 1;
6177 DECL_DECLARED_INLINE_P (clone
) = 1;
6178 DECL_INITIAL (clone
) = error_mark_node
;
6182 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6184 if (defaultable_fn_check (decl
))
6185 DECL_DEFAULTED_FN (decl
) = 1;
6187 DECL_INITIAL (decl
) = NULL_TREE
;
6191 if (init
&& VAR_P (decl
))
6193 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6194 /* If DECL is a reference, then we want to know whether init is a
6195 reference constant; init_const_expr_p as passed tells us whether
6196 it's an rvalue constant. */
6197 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6198 init_const_expr_p
= potential_constant_expression (init
);
6199 if (init_const_expr_p
)
6201 /* Set these flags now for templates. We'll update the flags in
6202 store_init_value for instantiations. */
6203 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6204 if (decl_maybe_constant_var_p (decl
))
6205 TREE_CONSTANT (decl
) = 1;
6209 if (processing_template_decl
)
6211 bool type_dependent_p
;
6213 /* Add this declaration to the statement-tree. */
6214 if (at_function_scope_p ())
6215 add_decl_expr (decl
);
6217 type_dependent_p
= dependent_type_p (type
);
6219 if (check_for_bare_parameter_packs (init
))
6222 DECL_INITIAL (decl
) = NULL_TREE
;
6225 /* Generally, initializers in templates are expanded when the
6226 template is instantiated. But, if DECL is a variable constant
6227 then it can be used in future constant expressions, so its value
6228 must be available. */
6230 if (!VAR_P (decl
) || dependent_type_p (type
))
6231 /* We can't do anything if the decl has dependent type. */;
6233 && init_const_expr_p
6234 && !type_dependent_p
6235 && decl_maybe_constant_var_p (decl
)
6236 && !type_dependent_init_p (init
)
6237 && !value_dependent_init_p (init
))
6239 /* This variable seems to be a non-dependent constant, so process
6240 its initializer. If check_initializer returns non-null the
6241 initialization wasn't constant after all. */
6243 cleanups
= make_tree_vector ();
6244 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6245 if (init_code
== NULL_TREE
)
6247 release_tree_vector (cleanups
);
6249 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6251 /* Deduce array size even if the initializer is dependent. */
6252 maybe_deduce_size_from_array_init (decl
, init
);
6253 /* And complain about multiple initializers. */
6254 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6255 && !MAYBE_CLASS_TYPE_P (type
))
6256 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6257 tf_warning_or_error
);
6261 DECL_INITIAL (decl
) = init
;
6265 /* Just store non-static data member initializers for later. */
6266 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6267 DECL_INITIAL (decl
) = init
;
6269 /* Take care of TYPE_DECLs up front. */
6270 if (TREE_CODE (decl
) == TYPE_DECL
)
6272 if (type
!= error_mark_node
6273 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6275 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6276 warning (0, "shadowing previous type declaration of %q#D", decl
);
6277 set_identifier_type_value (DECL_NAME (decl
), decl
);
6280 /* If we have installed this as the canonical typedef for this
6281 type, and that type has not been defined yet, delay emitting
6282 the debug information for it, as we will emit it later. */
6283 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6284 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6285 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6287 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6292 /* A reference will be modified here, as it is initialized. */
6293 if (! DECL_EXTERNAL (decl
)
6294 && TREE_READONLY (decl
)
6295 && TREE_CODE (type
) == REFERENCE_TYPE
)
6298 TREE_READONLY (decl
) = 0;
6303 /* If this is a local variable that will need a mangled name,
6304 register it now. We must do this before processing the
6305 initializer for the variable, since the initialization might
6306 require a guard variable, and since the mangled name of the
6307 guard variable will depend on the mangled name of this
6309 if (DECL_FUNCTION_SCOPE_P (decl
)
6310 && TREE_STATIC (decl
)
6311 && !DECL_ARTIFICIAL (decl
))
6313 push_local_name (decl
);
6314 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6315 || DECL_DESTRUCTOR_P (current_function_decl
))
6316 /* Normally local_decls is populated during GIMPLE lowering,
6317 but [cd]tors are never actually compiled directly. We need
6318 to put statics on the list so we can deal with the label
6319 address extension. FIXME. */
6320 add_local_decl (cfun
, decl
);
6323 /* Convert the initializer to the type of DECL, if we have not
6324 already initialized DECL. */
6325 if (!DECL_INITIALIZED_P (decl
)
6326 /* If !DECL_EXTERNAL then DECL is being defined. In the
6327 case of a static data member initialized inside the
6328 class-specifier, there can be an initializer even if DECL
6329 is *not* defined. */
6330 && (!DECL_EXTERNAL (decl
) || init
))
6332 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6335 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6336 /* Allow libjava/prims.cc define primitive classes. */
6337 if (init
!= NULL_TREE
6338 || jclass
== NULL_TREE
6339 || TREE_CODE (jclass
) != TYPE_DECL
6340 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6341 || !same_type_ignoring_top_level_qualifiers_p
6342 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6343 error ("Java object %qD not allocated with %<new%>", decl
);
6346 cleanups
= make_tree_vector ();
6347 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6353 The memory occupied by any object of static storage
6354 duration is zero-initialized at program startup before
6355 any other initialization takes place.
6357 We cannot create an appropriate initializer until after
6358 the type of DECL is finalized. If DECL_INITIAL is set,
6359 then the DECL is statically initialized, and any
6360 necessary zero-initialization has already been performed. */
6361 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6362 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6363 /*nelts=*/NULL_TREE
,
6364 /*static_storage_p=*/true);
6365 /* Remember that the initialization for this variable has
6367 DECL_INITIALIZED_P (decl
) = 1;
6368 /* This declaration is the definition of this variable,
6369 unless we are initializing a static data member within
6370 the class specifier. */
6371 if (!DECL_EXTERNAL (decl
))
6372 var_definition_p
= true;
6374 /* If the variable has an array type, lay out the type, even if
6375 there is no initializer. It is valid to index through the
6376 array, and we must get TYPE_ALIGN set correctly on the array
6378 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6381 if (TREE_STATIC (decl
)
6382 && !at_function_scope_p ()
6383 && current_function_decl
== NULL
)
6384 /* So decl is a global variable or a static member of a
6385 non local class. Record the types it uses
6386 so that we can decide later to emit debug info for them. */
6387 record_types_used_by_current_var_decl (decl
);
6389 else if (TREE_CODE (decl
) == FIELD_DECL
6390 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6391 error ("non-static data member %qD has Java class type", decl
);
6393 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
6395 /* If the VLA bound is larger than half the address space, or less
6396 than zero, throw std::bad_array_length. */
6397 tree max
= convert (ssizetype
, TYPE_MAX_VALUE (TYPE_DOMAIN (type
)));
6398 /* C++1y says we should throw for length <= 0, but we have
6399 historically supported zero-length arrays. Let's treat that as an
6400 extension to be disabled by -std=c++NN. */
6401 int lower
= flag_iso
? 0 : -1;
6402 tree comp
= build2 (LT_EXPR
, boolean_type_node
, max
, ssize_int (lower
));
6403 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
6404 throw_bad_array_length (), void_zero_node
);
6405 finish_expr_stmt (comp
);
6408 /* Add this declaration to the statement-tree. This needs to happen
6409 after the call to check_initializer so that the DECL_EXPR for a
6410 reference temp is added before the DECL_EXPR for the reference itself. */
6411 if (DECL_FUNCTION_SCOPE_P (decl
))
6412 add_decl_expr (decl
);
6414 /* Let the middle end know about variables and functions -- but not
6415 static data members in uninstantiated class templates. */
6416 if (VAR_OR_FUNCTION_DECL_P (decl
))
6420 layout_var_decl (decl
);
6421 maybe_commonize_var (decl
);
6424 /* This needs to happen after the linkage is set. */
6425 determine_visibility (decl
);
6427 if (var_definition_p
&& TREE_STATIC (decl
))
6429 /* If a TREE_READONLY variable needs initialization
6430 at runtime, it is no longer readonly and we need to
6431 avoid MEM_READONLY_P being set on RTL created for it. */
6434 if (TREE_READONLY (decl
))
6435 TREE_READONLY (decl
) = 0;
6438 else if (was_readonly
)
6439 TREE_READONLY (decl
) = 1;
6441 /* Likewise if it needs destruction. */
6442 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6443 TREE_READONLY (decl
) = 0;
6446 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6448 /* Check for abstractness of the type. Notice that there is no
6449 need to strip array types here since the check for those types
6450 is already done within create_array_type_for_decl. */
6451 abstract_virtuals_error (decl
, type
);
6453 if (TREE_TYPE (decl
) == error_mark_node
)
6454 /* No initialization required. */
6456 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6460 if (init
== ridpointers
[(int)RID_DEFAULT
])
6462 /* An out-of-class default definition is defined at
6463 the point where it is explicitly defaulted. */
6464 if (DECL_DELETED_FN (decl
))
6465 maybe_explain_implicit_delete (decl
);
6466 else if (DECL_INITIAL (decl
) == error_mark_node
)
6467 synthesize_method (decl
);
6470 error ("function %q#D is initialized like a variable", decl
);
6472 /* else no initialization required. */
6474 else if (DECL_EXTERNAL (decl
)
6475 && ! (DECL_LANG_SPECIFIC (decl
)
6476 && DECL_NOT_REALLY_EXTERN (decl
)))
6479 DECL_INITIAL (decl
) = init
;
6481 /* A variable definition. */
6482 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6483 /* Initialize the local variable. */
6484 initialize_local_var (decl
, init
);
6486 /* If a variable is defined, and then a subsequent
6487 definition with external linkage is encountered, we will
6488 get here twice for the same variable. We want to avoid
6489 calling expand_static_init more than once. For variables
6490 that are not static data members, we can call
6491 expand_static_init only when we actually process the
6492 initializer. It is not legal to redeclare a static data
6493 member, so this issue does not arise in that case. */
6494 else if (var_definition_p
&& TREE_STATIC (decl
))
6495 expand_static_init (decl
, init
);
6498 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6499 reference, insert it in the statement-tree now. */
6503 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6504 push_cleanup (decl
, t
, false);
6505 release_tree_vector (cleanups
);
6509 TREE_READONLY (decl
) = 1;
6511 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6514 /* Returns a declaration for a VAR_DECL as if:
6516 extern "C" TYPE NAME;
6518 had been seen. Used to create compiler-generated global
6522 declare_global_var (tree name
, tree type
)
6526 push_to_top_level ();
6527 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6528 TREE_PUBLIC (decl
) = 1;
6529 DECL_EXTERNAL (decl
) = 1;
6530 DECL_ARTIFICIAL (decl
) = 1;
6531 /* If the user has explicitly declared this variable (perhaps
6532 because the code we are compiling is part of a low-level runtime
6533 library), then it is possible that our declaration will be merged
6534 with theirs by pushdecl. */
6535 decl
= pushdecl (decl
);
6536 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6537 pop_from_top_level ();
6542 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6543 if "__cxa_atexit" is not being used) corresponding to the function
6544 to be called when the program exits. */
6547 get_atexit_fn_ptr_type (void)
6551 if (!atexit_fn_ptr_type_node
)
6554 if (flag_use_cxa_atexit
6555 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6556 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6557 arg_type
= ptr_type_node
;
6559 /* The parameter to "atexit" is "void (*)(void)". */
6560 arg_type
= NULL_TREE
;
6562 fn_type
= build_function_type_list (void_type_node
,
6563 arg_type
, NULL_TREE
);
6564 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6567 return atexit_fn_ptr_type_node
;
6570 /* Returns a pointer to the `atexit' function. Note that if
6571 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6572 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6575 get_atexit_node (void)
6581 bool use_aeabi_atexit
;
6586 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6588 /* The declaration for `__cxa_atexit' is:
6590 int __cxa_atexit (void (*)(void *), void *, void *)
6592 We build up the argument types and then the function type
6594 tree argtype0
, argtype1
, argtype2
;
6596 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6597 /* First, build the pointer-to-function type for the first
6599 fn_ptr_type
= get_atexit_fn_ptr_type ();
6600 /* Then, build the rest of the argument types. */
6601 argtype2
= ptr_type_node
;
6602 if (use_aeabi_atexit
)
6604 argtype1
= fn_ptr_type
;
6605 argtype0
= ptr_type_node
;
6609 argtype1
= ptr_type_node
;
6610 argtype0
= fn_ptr_type
;
6612 /* And the final __cxa_atexit type. */
6613 fn_type
= build_function_type_list (integer_type_node
,
6614 argtype0
, argtype1
, argtype2
,
6616 if (use_aeabi_atexit
)
6617 name
= "__aeabi_atexit";
6619 name
= "__cxa_atexit";
6623 /* The declaration for `atexit' is:
6625 int atexit (void (*)());
6627 We build up the argument types and then the function type
6629 fn_ptr_type
= get_atexit_fn_ptr_type ();
6630 /* Build the final atexit type. */
6631 fn_type
= build_function_type_list (integer_type_node
,
6632 fn_ptr_type
, NULL_TREE
);
6636 /* Now, build the function declaration. */
6637 push_lang_context (lang_name_c
);
6638 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6639 mark_used (atexit_fndecl
);
6640 pop_lang_context ();
6641 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6646 /* Like get_atexit_node, but for thread-local cleanups. */
6649 get_thread_atexit_node (void)
6651 /* The declaration for `__cxa_thread_atexit' is:
6653 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6654 tree fn_type
= build_function_type_list (integer_type_node
,
6655 get_atexit_fn_ptr_type (),
6656 ptr_type_node
, ptr_type_node
,
6659 /* Now, build the function declaration. */
6660 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
);
6661 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6664 /* Returns the __dso_handle VAR_DECL. */
6667 get_dso_handle_node (void)
6669 if (dso_handle_node
)
6670 return dso_handle_node
;
6672 /* Declare the variable. */
6673 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6676 #ifdef HAVE_GAS_HIDDEN
6677 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6678 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6681 return dso_handle_node
;
6684 /* Begin a new function with internal linkage whose job will be simply
6685 to destroy some particular variable. */
6687 static GTY(()) int start_cleanup_cnt
;
6690 start_cleanup_fn (void)
6695 bool use_cxa_atexit
= flag_use_cxa_atexit
6696 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6698 push_to_top_level ();
6700 /* No need to mangle this. */
6701 push_lang_context (lang_name_c
);
6703 /* Build the name of the function. */
6704 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6705 /* Build the function declaration. */
6706 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6707 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6708 /* It's a function with internal linkage, generated by the
6710 TREE_PUBLIC (fndecl
) = 0;
6711 DECL_ARTIFICIAL (fndecl
) = 1;
6712 /* Make the function `inline' so that it is only emitted if it is
6713 actually needed. It is unlikely that it will be inlined, since
6714 it is only called via a function pointer, but we avoid unnecessary
6715 emissions this way. */
6716 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6717 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6718 /* Build the parameter. */
6723 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6724 DECL_CONTEXT (parmdecl
) = fndecl
;
6725 TREE_USED (parmdecl
) = 1;
6726 DECL_READ_P (parmdecl
) = 1;
6727 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6731 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6733 pop_lang_context ();
6735 return current_function_decl
;
6738 /* Finish the cleanup function begun by start_cleanup_fn. */
6741 end_cleanup_fn (void)
6743 expand_or_defer_fn (finish_function (0));
6745 pop_from_top_level ();
6748 /* Generate code to handle the destruction of DECL, an object with
6749 static storage duration. */
6752 register_dtor_fn (tree decl
)
6759 bool ob_parm
, dso_parm
, use_dtor
;
6760 tree arg0
, arg1
, arg2
;
6763 type
= TREE_TYPE (decl
);
6764 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6765 return void_zero_node
;
6767 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6768 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6769 destructor to "__cxa_atexit"; we don't have to build a temporary
6770 function to do the cleanup. */
6771 dso_parm
= (flag_use_cxa_atexit
6772 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6773 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6774 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6779 /* Find the destructor. */
6780 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6781 gcc_assert (idx
>= 0);
6782 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6783 /* Make sure it is accessible. */
6784 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6785 tf_warning_or_error
);
6789 /* Call build_cleanup before we enter the anonymous function so
6790 that any access checks will be done relative to the current
6791 scope, rather than the scope of the anonymous function. */
6792 build_cleanup (decl
);
6794 /* Now start the function. */
6795 cleanup
= start_cleanup_fn ();
6797 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6798 to the original function, rather than the anonymous one. That
6799 will make the back end think that nested functions are in use,
6800 which causes confusion. */
6801 push_deferring_access_checks (dk_no_check
);
6802 fcall
= build_cleanup (decl
);
6803 pop_deferring_access_checks ();
6805 /* Create the body of the anonymous function. */
6806 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6807 finish_expr_stmt (fcall
);
6808 finish_compound_stmt (compound_stmt
);
6812 /* Call atexit with the cleanup function. */
6813 mark_used (cleanup
);
6814 cleanup
= build_address (cleanup
);
6816 if (DECL_THREAD_LOCAL_P (decl
))
6817 atex_node
= get_thread_atexit_node ();
6819 atex_node
= get_atexit_node ();
6823 /* We must convert CLEANUP to the type that "__cxa_atexit"
6825 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6826 /* "__cxa_atexit" will pass the address of DECL to the
6827 cleanup function. */
6829 addr
= build_address (decl
);
6830 /* The declared type of the parameter to "__cxa_atexit" is
6831 "void *". For plain "T*", we could just let the
6832 machinery in cp_build_function_call convert it -- but if the
6833 type is "cv-qualified T *", then we need to convert it
6834 before passing it in, to avoid spurious errors. */
6835 addr
= build_nop (ptr_type_node
, addr
);
6838 /* Since the cleanup functions we build ignore the address
6839 they're given, there's no reason to pass the actual address
6840 in, and, in general, it's cheaper to pass NULL than any
6842 addr
= null_pointer_node
;
6845 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6846 tf_warning_or_error
);
6848 /* Just pass NULL to the dso handle parm if we don't actually
6849 have a DSO handle on this target. */
6850 arg2
= null_pointer_node
;
6856 if (!DECL_THREAD_LOCAL_P (decl
)
6857 && targetm
.cxx
.use_aeabi_atexit ())
6873 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6874 arg0
, arg1
, arg2
, NULL_TREE
);
6877 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6878 is its initializer. Generate code to handle the construction
6879 and destruction of DECL. */
6882 expand_static_init (tree decl
, tree init
)
6884 gcc_assert (VAR_P (decl
));
6885 gcc_assert (TREE_STATIC (decl
));
6887 /* Some variables require no dynamic initialization. */
6889 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6892 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6893 && !DECL_FUNCTION_SCOPE_P (decl
))
6896 error ("non-local variable %qD declared %<__thread%> "
6897 "needs dynamic initialization", decl
);
6899 error ("non-local variable %qD declared %<__thread%> "
6900 "has a non-trivial destructor", decl
);
6901 static bool informed
;
6904 inform (DECL_SOURCE_LOCATION (decl
),
6905 "C++11 %<thread_local%> allows dynamic initialization "
6912 if (DECL_FUNCTION_SCOPE_P (decl
))
6914 /* Emit code to perform this initialization but once. */
6915 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6916 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6917 tree guard
, guard_addr
;
6919 /* We don't need thread-safety code for thread-local vars. */
6920 bool thread_guard
= (flag_threadsafe_statics
6921 && !DECL_THREAD_LOCAL_P (decl
));
6923 /* Emit code to perform this initialization but once. This code
6926 static <type> guard;
6927 if (!guard.first_byte) {
6928 if (__cxa_guard_acquire (&guard)) {
6931 // Do initialization.
6932 flag = true; __cxa_guard_release (&guard);
6933 // Register variable for destruction at end of program.
6935 if (!flag) __cxa_guard_abort (&guard);
6939 Note that the `flag' variable is only set to 1 *after* the
6940 initialization is complete. This ensures that an exception,
6941 thrown during the construction, will cause the variable to
6942 reinitialized when we pass through this code again, as per:
6946 If the initialization exits by throwing an exception, the
6947 initialization is not complete, so it will be tried again
6948 the next time control enters the declaration.
6950 This process should be thread-safe, too; multiple threads
6951 should not be able to initialize the variable more than
6954 /* Create the guard variable. */
6955 guard
= get_guard (decl
);
6957 /* This optimization isn't safe on targets with relaxed memory
6958 consistency. On such targets we force synchronization in
6959 __cxa_guard_acquire. */
6960 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6962 /* Begin the conditional initialization. */
6963 if_stmt
= begin_if_stmt ();
6964 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6965 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6970 tree vfntype
= NULL_TREE
;
6971 tree acquire_name
, release_name
, abort_name
;
6972 tree acquire_fn
, release_fn
, abort_fn
;
6973 guard_addr
= build_address (guard
);
6975 acquire_name
= get_identifier ("__cxa_guard_acquire");
6976 release_name
= get_identifier ("__cxa_guard_release");
6977 abort_name
= get_identifier ("__cxa_guard_abort");
6978 acquire_fn
= identifier_global_value (acquire_name
);
6979 release_fn
= identifier_global_value (release_name
);
6980 abort_fn
= identifier_global_value (abort_name
);
6982 acquire_fn
= push_library_fn
6983 (acquire_name
, build_function_type_list (integer_type_node
,
6984 TREE_TYPE (guard_addr
),
6987 if (!release_fn
|| !abort_fn
)
6988 vfntype
= build_function_type_list (void_type_node
,
6989 TREE_TYPE (guard_addr
),
6992 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6994 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6996 inner_if_stmt
= begin_if_stmt ();
6997 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7000 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7001 begin
= get_target_expr (boolean_false_node
);
7002 flag
= TARGET_EXPR_SLOT (begin
);
7004 TARGET_EXPR_CLEANUP (begin
)
7005 = build3 (COND_EXPR
, void_type_node
, flag
,
7007 build_call_n (abort_fn
, 1, guard_addr
));
7008 CLEANUP_EH_ONLY (begin
) = 1;
7010 /* Do the initialization itself. */
7011 init
= add_stmt_to_compound (begin
, init
);
7012 init
= add_stmt_to_compound
7013 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7014 init
= add_stmt_to_compound
7015 (init
, build_call_n (release_fn
, 1, guard_addr
));
7018 init
= add_stmt_to_compound (init
, set_guard (guard
));
7020 /* Use atexit to register a function for destroying this static
7022 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7024 finish_expr_stmt (init
);
7028 finish_compound_stmt (inner_then_clause
);
7029 finish_then_clause (inner_if_stmt
);
7030 finish_if_stmt (inner_if_stmt
);
7033 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7035 finish_compound_stmt (then_clause
);
7036 finish_then_clause (if_stmt
);
7037 finish_if_stmt (if_stmt
);
7040 else if (DECL_THREAD_LOCAL_P (decl
))
7041 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7043 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7047 /* Make TYPE a complete type based on INITIAL_VALUE.
7048 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7049 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7050 3 if the initializer list is empty (in pedantic mode). */
7053 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7056 tree type
, elt_type
;
7060 unsigned HOST_WIDE_INT i
;
7063 /* An array of character type can be initialized from a
7064 brace-enclosed string constant.
7066 FIXME: this code is duplicated from reshape_init. Probably
7067 we should just call reshape_init here? */
7068 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7069 && TREE_CODE (initial_value
) == CONSTRUCTOR
7070 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7072 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7073 tree value
= (*v
)[0].value
;
7075 if (TREE_CODE (value
) == STRING_CST
7076 && v
->length () == 1)
7077 initial_value
= value
;
7080 /* If any of the elements are parameter packs, we can't actually
7081 complete this type now because the array size is dependent. */
7082 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7084 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7087 if (PACK_EXPANSION_P (value
))
7093 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7095 /* We can create the array before the element type is complete, which
7096 means that we didn't have these two bits set in the original type
7097 either. In completing the type, we are expected to propagate these
7098 bits. See also complete_type which does the same thing for arrays
7101 if (TYPE_DOMAIN (type
))
7103 elt_type
= TREE_TYPE (type
);
7104 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7105 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7106 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7112 /* As above, but either give an error or reject zero-size arrays, depending
7116 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7117 bool do_default
, tsubst_flags_t complain
)
7120 bool sfinae
= !(complain
& tf_error
);
7121 /* In SFINAE context we can't be lenient about zero-size arrays. */
7124 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7130 /* Not an error. */;
7131 else if (failure
== 1)
7132 error ("initializer fails to determine size of %qT", *ptype
);
7133 else if (failure
== 2)
7136 error ("array size missing in %qT", *ptype
);
7138 else if (failure
== 3)
7139 error ("zero-size array %qT", *ptype
);
7140 *ptype
= error_mark_node
;
7145 /* Return zero if something is declared to be a member of type
7146 CTYPE when in the context of CUR_TYPE. STRING is the error
7147 message to print in that case. Otherwise, quietly return 1. */
7150 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7152 if (ctype
&& ctype
!= cur_type
)
7154 if (flags
== DTOR_FLAG
)
7155 error ("destructor for alien class %qT cannot be a member", ctype
);
7157 error ("constructor for alien class %qT cannot be a member", ctype
);
7163 /* Subroutine of `grokdeclarator'. */
7165 /* Generate errors possibly applicable for a given set of specifiers.
7166 This is for ARM $7.1.2. */
7169 bad_specifiers (tree object
,
7170 enum bad_spec_place type
,
7181 error ("%qD declared as a %<virtual%> variable", object
);
7183 error ("%qD declared as an %<inline%> variable", object
);
7185 error ("%<const%> and %<volatile%> function specifiers on "
7186 "%qD invalid in variable declaration", object
);
7190 error ("%qD declared as a %<virtual%> parameter", object
);
7192 error ("%qD declared as an %<inline%> parameter", object
);
7194 error ("%<const%> and %<volatile%> function specifiers on "
7195 "%qD invalid in parameter declaration", object
);
7199 error ("%qD declared as a %<virtual%> type", object
);
7201 error ("%qD declared as an %<inline%> type", object
);
7203 error ("%<const%> and %<volatile%> function specifiers on "
7204 "%qD invalid in type declaration", object
);
7208 error ("%qD declared as a %<virtual%> field", object
);
7210 error ("%qD declared as an %<inline%> field", object
);
7212 error ("%<const%> and %<volatile%> function specifiers on "
7213 "%qD invalid in field declaration", object
);
7219 error ("%q+D declared as a friend", object
);
7221 && (TREE_CODE (object
) == TYPE_DECL
7222 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7223 && !TYPE_REFFN_P (TREE_TYPE (object
))
7224 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7225 error ("%q+D declared with an exception specification", object
);
7228 /* DECL is a member function or static data member and is presently
7229 being defined. Check that the definition is taking place in a
7233 check_class_member_definition_namespace (tree decl
)
7235 /* These checks only apply to member functions and static data
7237 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7238 /* We check for problems with specializations in pt.c in
7239 check_specialization_namespace, where we can issue better
7241 if (processing_specialization
)
7243 /* There are no restrictions on the placement of
7244 explicit instantiations. */
7245 if (processing_explicit_instantiation
)
7249 A member function definition that appears outside of the
7250 class definition shall appear in a namespace scope enclosing
7251 the class definition.
7255 The definition for a static data member shall appear in a
7256 namespace scope enclosing the member's class definition. */
7257 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7258 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7259 decl
, DECL_CONTEXT (decl
));
7262 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7263 METHOD_TYPE for a non-static member function; QUALS are the
7264 cv-qualifiers that apply to the function. */
7267 build_this_parm (tree type
, cp_cv_quals quals
)
7272 cp_cv_quals this_quals
;
7274 if (CLASS_TYPE_P (type
))
7277 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7278 this_type
= build_pointer_type (this_type
);
7281 this_type
= type_of_this_parm (type
);
7282 /* The `this' parameter is implicitly `const'; it cannot be
7284 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7285 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7286 parm
= build_artificial_parm (this_identifier
, qual_type
);
7287 cp_apply_type_quals_to_decl (this_quals
, parm
);
7291 /* DECL is a static member function. Complain if it was declared
7292 with function-cv-quals. */
7295 check_static_quals (tree decl
, cp_cv_quals quals
)
7297 if (quals
!= TYPE_UNQUALIFIED
)
7298 error ("static member function %q#D declared with type qualifiers",
7302 /* CTYPE is class type, or null if non-class.
7303 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7305 DECLARATOR is the function's name.
7306 PARMS is a chain of PARM_DECLs for the function.
7307 VIRTUALP is truthvalue of whether the function is virtual or not.
7308 FLAGS are to be passed through to `grokclassfn'.
7309 QUALS are qualifiers indicating whether the function is `const'
7311 RAISES is a list of exceptions that this function can raise.
7312 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7313 not look, and -1 if we should not call `grokclassfn' at all.
7315 SFK is the kind of special function (if any) for the new function.
7317 Returns `NULL_TREE' if something goes wrong, after issuing
7318 applicable error messages. */
7321 grokfndecl (tree ctype
,
7325 tree orig_declarator
,
7327 enum overload_flags flags
,
7329 cp_ref_qualifier rqual
,
7335 special_function_kind sfk
,
7340 location_t location
)
7343 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7347 type
= build_ref_qualified_type (type
, rqual
);
7349 type
= build_exception_variant (type
, raises
);
7351 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7353 /* If we have an explicit location, use it, otherwise use whatever
7354 build_lang_decl used (probably input_location). */
7355 if (location
!= UNKNOWN_LOCATION
)
7356 DECL_SOURCE_LOCATION (decl
) = location
;
7358 if (TREE_CODE (type
) == METHOD_TYPE
)
7361 parm
= build_this_parm (type
, quals
);
7362 DECL_CHAIN (parm
) = parms
;
7365 DECL_ARGUMENTS (decl
) = parms
;
7366 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7367 DECL_CONTEXT (t
) = decl
;
7368 /* Propagate volatile out from type to decl. */
7369 if (TYPE_VOLATILE (type
))
7370 TREE_THIS_VOLATILE (decl
) = 1;
7372 /* Setup decl according to sfk. */
7375 case sfk_constructor
:
7376 case sfk_copy_constructor
:
7377 case sfk_move_constructor
:
7378 DECL_CONSTRUCTOR_P (decl
) = 1;
7380 case sfk_destructor
:
7381 DECL_DESTRUCTOR_P (decl
) = 1;
7387 /* If pointers to member functions use the least significant bit to
7388 indicate whether a function is virtual, ensure a pointer
7389 to this function will have that bit clear. */
7390 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7391 && TREE_CODE (type
) == METHOD_TYPE
7392 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7393 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7396 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7400 ("defining explicit specialization %qD in friend declaration",
7404 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7405 tree args
= TREE_OPERAND (orig_declarator
, 1);
7407 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7409 /* Something like `template <class T> friend void f<T>()'. */
7410 error ("invalid use of template-id %qD in declaration "
7411 "of primary template",
7417 /* A friend declaration of the form friend void f<>(). Record
7418 the information in the TEMPLATE_ID_EXPR. */
7419 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7421 if (TREE_CODE (fns
) == COMPONENT_REF
)
7423 /* Due to bison parser ickiness, we will have already looked
7424 up an operator_name or PFUNCNAME within the current class
7425 (see template_id in parse.y). If the current class contains
7426 such a name, we'll get a COMPONENT_REF here. Undo that. */
7428 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7429 == current_class_type
);
7430 fns
= TREE_OPERAND (fns
, 1);
7432 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7433 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7435 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7436 if (TREE_PURPOSE (t
)
7437 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7439 error ("default arguments are not allowed in declaration "
7440 "of friend template specialization %qD",
7446 error ("%<inline%> is not allowed in declaration of friend "
7447 "template specialization %qD",
7450 error ("%<constexpr%> is not allowed in declaration of friend "
7451 "template specialization %qD",
7458 /* If this decl has namespace scope, set that up. */
7460 set_decl_namespace (decl
, in_namespace
, friendp
);
7462 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7464 /* `main' and builtins have implicit 'C' linkage. */
7465 if ((MAIN_NAME_P (declarator
)
7466 || (IDENTIFIER_LENGTH (declarator
) > 10
7467 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7468 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7469 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7470 && current_lang_name
== lang_name_cplusplus
7471 && ctype
== NULL_TREE
7472 && DECL_FILE_SCOPE_P (decl
))
7473 SET_DECL_LANGUAGE (decl
, lang_c
);
7475 /* Should probably propagate const out from type to decl I bet (mrs). */
7478 DECL_STATIC_FUNCTION_P (decl
) = 1;
7479 DECL_CONTEXT (decl
) = ctype
;
7484 DECL_CONTEXT (decl
) = ctype
;
7486 check_class_member_definition_namespace (decl
);
7489 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7491 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7492 error ("cannot declare %<::main%> to be a template");
7494 error ("cannot declare %<::main%> to be inline");
7496 error ("cannot declare %<::main%> to be constexpr");
7498 error ("cannot declare %<::main%> to be static");
7503 /* Members of anonymous types and local classes have no linkage; make
7504 them internal. If a typedef is made later, this will be changed. */
7505 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7506 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7509 if (publicp
&& cxx_dialect
== cxx98
)
7511 /* [basic.link]: A name with no linkage (notably, the name of a class
7512 or enumeration declared in a local scope) shall not be used to
7513 declare an entity with linkage.
7515 DR 757 relaxes this restriction for C++0x. */
7516 t
= no_linkage_check (TREE_TYPE (decl
),
7517 /*relaxed_p=*/false);
7520 if (TYPE_ANONYMOUS_P (t
))
7522 if (DECL_EXTERN_C_P (decl
))
7523 /* Allow this; it's pretty common in C. */;
7526 permerror (input_location
, "anonymous type with no linkage "
7527 "used to declare function %q#D with linkage",
7529 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7530 permerror (input_location
, "%q+#D does not refer to the unqualified "
7531 "type, so it is not used for linkage",
7536 permerror (input_location
, "type %qT with no linkage used to "
7537 "declare function %q#D with linkage", t
, decl
);
7541 TREE_PUBLIC (decl
) = publicp
;
7544 DECL_INTERFACE_KNOWN (decl
) = 1;
7545 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7548 /* If the declaration was declared inline, mark it as such. */
7550 DECL_DECLARED_INLINE_P (decl
) = 1;
7552 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7554 DECL_EXTERNAL (decl
) = 1;
7555 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7560 ? G_("static member function %qD cannot have cv-qualifier")
7561 : G_("non-member function %qD cannot have cv-qualifier"),
7563 quals
= TYPE_UNQUALIFIED
;
7569 ? G_("static member function %qD cannot have ref-qualifier")
7570 : G_("non-member function %qD cannot have ref-qualifier"),
7572 rqual
= REF_QUAL_NONE
;
7576 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7577 && !grok_op_properties (decl
, /*complain=*/true))
7579 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7581 bool long_long_unsigned_p
;
7583 const char *suffix
= NULL
;
7584 /* [over.literal]/6: Literal operators shall not have C linkage. */
7585 if (DECL_LANGUAGE (decl
) == lang_c
)
7587 error ("literal operator with C linkage");
7591 if (DECL_NAMESPACE_SCOPE_P (decl
))
7593 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7596 error ("%qD has invalid argument list", decl
);
7600 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7601 if (long_long_unsigned_p
)
7603 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7604 warning (0, "integer suffix %<%s%>"
7605 " shadowed by implementation", suffix
);
7607 else if (long_double_p
)
7609 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7610 warning (0, "floating point suffix %<%s%>"
7611 " shadowed by implementation", suffix
);
7616 error ("%qD must be a non-member function", decl
);
7622 /* Make the init_value nonzero so pushdecl knows this is not
7623 tentative. error_mark_node is replaced later with the BLOCK. */
7624 DECL_INITIAL (decl
) = error_mark_node
;
7626 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7627 TREE_NOTHROW (decl
) = 1;
7629 /* Caller will do the rest of this. */
7633 if (ctype
!= NULL_TREE
)
7634 grokclassfn (ctype
, decl
, flags
);
7637 if (cxx_dialect
>= cxx11
7638 && DECL_DESTRUCTOR_P (decl
)
7639 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7640 && !processing_template_decl
)
7641 deduce_noexcept_on_destructor (decl
);
7643 decl
= check_explicit_specialization (orig_declarator
, decl
,
7646 4 * (friendp
!= 0));
7647 if (decl
== error_mark_node
)
7650 if (DECL_STATIC_FUNCTION_P (decl
))
7651 check_static_quals (decl
, quals
);
7655 cplus_decl_attributes (&decl
, *attrlist
, 0);
7656 *attrlist
= NULL_TREE
;
7659 /* Check main's type after attributes have been applied. */
7660 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7662 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7665 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7667 error ("%<::main%> must return %<int%>");
7668 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7669 TREE_TYPE (decl
) = newtype
;
7672 check_main_parameter_types (decl
);
7675 if (ctype
!= NULL_TREE
7676 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7679 tree old_decl
= check_classfn (ctype
, decl
,
7680 (processing_template_decl
7681 > template_class_depth (ctype
))
7682 ? current_template_parms
7685 if (old_decl
== error_mark_node
)
7693 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7694 /* Because grokfndecl is always supposed to return a
7695 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7696 here. We depend on our callers to figure out that its
7697 really a template that's being returned. */
7698 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7700 if (DECL_STATIC_FUNCTION_P (old_decl
)
7701 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7703 /* Remove the `this' parm added by grokclassfn. */
7704 revert_static_member_fn (decl
);
7705 check_static_quals (decl
, quals
);
7707 if (DECL_ARTIFICIAL (old_decl
))
7709 error ("definition of implicitly-declared %qD", old_decl
);
7712 else if (DECL_DEFAULTED_FN (old_decl
))
7714 error ("definition of explicitly-defaulted %q+D", decl
);
7715 error ("%q+#D explicitly defaulted here", old_decl
);
7719 /* Since we've smashed OLD_DECL to its
7720 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7721 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7722 decl
= DECL_TEMPLATE_RESULT (decl
);
7724 /* Attempt to merge the declarations. This can fail, in
7725 the case of some invalid specialization declarations. */
7726 pushed_scope
= push_scope (ctype
);
7727 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7729 pop_scope (pushed_scope
);
7732 error ("no %q#D member function declared in class %qT",
7740 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7743 if (ctype
== NULL_TREE
|| check
)
7747 DECL_VIRTUAL_P (decl
) = 1;
7752 /* decl is a FUNCTION_DECL.
7753 specifiers are the parsed virt-specifiers.
7755 Set flags to reflect the virt-specifiers.
7760 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7762 if (decl
== NULL_TREE
)
7764 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7765 DECL_OVERRIDE_P (decl
) = 1;
7766 if (specifiers
& VIRT_SPEC_FINAL
)
7767 DECL_FINAL_P (decl
) = 1;
7771 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7772 the linkage that DECL will receive in the object file. */
7775 set_linkage_for_static_data_member (tree decl
)
7777 /* A static data member always has static storage duration and
7778 external linkage. Note that static data members are forbidden in
7779 local classes -- the only situation in which a class has
7780 non-external linkage. */
7781 TREE_PUBLIC (decl
) = 1;
7782 TREE_STATIC (decl
) = 1;
7783 /* For non-template classes, static data members are always put
7784 out in exactly those files where they are defined, just as
7785 with ordinary namespace-scope variables. */
7786 if (!processing_template_decl
)
7787 DECL_INTERFACE_KNOWN (decl
) = 1;
7790 /* Create a VAR_DECL named NAME with the indicated TYPE.
7792 If SCOPE is non-NULL, it is the class type or namespace containing
7793 the variable. If SCOPE is NULL, the variable should is created in
7794 the innermost enclosings scope. */
7797 grokvardecl (tree type
,
7799 const cp_decl_specifier_seq
*declspecs
,
7805 tree explicit_scope
;
7807 gcc_assert (!name
|| identifier_p (name
));
7809 /* Compute the scope in which to place the variable, but remember
7810 whether or not that scope was explicitly specified by the user. */
7811 explicit_scope
= scope
;
7814 /* An explicit "extern" specifier indicates a namespace-scope
7816 if (declspecs
->storage_class
== sc_extern
)
7817 scope
= current_decl_namespace ();
7818 else if (!at_function_scope_p ())
7819 scope
= current_scope ();
7823 && (/* If the variable is a namespace-scope variable declared in a
7824 template, we need DECL_LANG_SPECIFIC. */
7825 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7826 /* Similarly for namespace-scope variables with language linkage
7828 || (TREE_CODE (scope
) == NAMESPACE_DECL
7829 && current_lang_name
!= lang_name_cplusplus
)
7830 /* Similarly for static data members. */
7832 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7834 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7836 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7837 set_decl_namespace (decl
, explicit_scope
, 0);
7839 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7841 if (declspecs
->storage_class
== sc_extern
)
7843 DECL_THIS_EXTERN (decl
) = 1;
7844 DECL_EXTERNAL (decl
) = !initialized
;
7847 if (DECL_CLASS_SCOPE_P (decl
))
7849 set_linkage_for_static_data_member (decl
);
7850 /* This function is only called with out-of-class definitions. */
7851 DECL_EXTERNAL (decl
) = 0;
7852 check_class_member_definition_namespace (decl
);
7854 /* At top level, either `static' or no s.c. makes a definition
7855 (perhaps tentative), and absence of `static' makes it public. */
7856 else if (toplevel_bindings_p ())
7858 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7859 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7860 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7862 /* Not at top level, only `static' makes a static definition. */
7865 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7866 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7869 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7871 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7872 if (declspecs
->gnu_thread_keyword_p
)
7873 DECL_GNU_TLS_P (decl
) = true;
7876 /* If the type of the decl has no linkage, make sure that we'll
7877 notice that in mark_used. */
7878 if (cxx_dialect
> cxx98
7879 && decl_linkage (decl
) != lk_none
7880 && DECL_LANG_SPECIFIC (decl
) == NULL
7881 && !DECL_EXTERN_C_P (decl
)
7882 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7883 retrofit_lang_decl (decl
);
7885 if (TREE_PUBLIC (decl
))
7887 /* [basic.link]: A name with no linkage (notably, the name of a class
7888 or enumeration declared in a local scope) shall not be used to
7889 declare an entity with linkage.
7891 DR 757 relaxes this restriction for C++0x. */
7892 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7893 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7896 if (TYPE_ANONYMOUS_P (t
))
7898 if (DECL_EXTERN_C_P (decl
))
7899 /* Allow this; it's pretty common in C. */
7903 /* DRs 132, 319 and 389 seem to indicate types with
7904 no linkage can only be used to declare extern "C"
7905 entities. Since it's not always an error in the
7906 ISO C++ 90 Standard, we only issue a warning. */
7907 warning (0, "anonymous type with no linkage used to declare "
7908 "variable %q#D with linkage", decl
);
7909 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7910 warning (0, "%q+#D does not refer to the unqualified "
7911 "type, so it is not used for linkage",
7916 warning (0, "type %qT with no linkage used to declare variable "
7917 "%q#D with linkage", t
, decl
);
7921 DECL_INTERFACE_KNOWN (decl
) = 1;
7926 /* Create and return a canonical pointer to member function type, for
7927 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7930 build_ptrmemfunc_type (tree type
)
7934 tree unqualified_variant
= NULL_TREE
;
7936 if (type
== error_mark_node
)
7939 /* If a canonical type already exists for this type, use it. We use
7940 this method instead of type_hash_canon, because it only does a
7941 simple equality check on the list of field members. */
7943 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7946 /* Make sure that we always have the unqualified pointer-to-member
7948 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7950 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7952 t
= make_class_type (RECORD_TYPE
);
7953 xref_basetypes (t
, NULL_TREE
);
7955 /* Let the front end know this is a pointer to member function... */
7956 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7957 /* ... and not really a class type. */
7958 SET_CLASS_TYPE_P (t
, 0);
7960 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7963 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7965 DECL_CHAIN (field
) = fields
;
7968 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7970 /* Zap out the name so that the back end will give us the debugging
7971 information for this anonymous RECORD_TYPE. */
7972 TYPE_NAME (t
) = NULL_TREE
;
7974 /* If this is not the unqualified form of this pointer-to-member
7975 type, set the TYPE_MAIN_VARIANT for this type to be the
7976 unqualified type. Since they are actually RECORD_TYPEs that are
7977 not variants of each other, we must do this manually.
7978 As we just built a new type there is no need to do yet another copy. */
7979 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7981 int type_quals
= cp_type_quals (type
);
7982 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7983 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7984 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7985 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7986 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7987 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7988 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7991 /* Cache this pointer-to-member type so that we can find it again
7993 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7995 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7996 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7997 else if (TYPE_CANONICAL (type
) != type
)
7998 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8003 /* Create and return a pointer to data member type. */
8006 build_ptrmem_type (tree class_type
, tree member_type
)
8008 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8010 cp_cv_quals quals
= type_memfn_quals (member_type
);
8011 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8012 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8013 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8017 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8018 return build_offset_type (class_type
, member_type
);
8022 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8023 Check to see that the definition is valid. Issue appropriate error
8024 messages. Return 1 if the definition is particularly bad, or 0
8028 check_static_variable_definition (tree decl
, tree type
)
8030 /* Can't check yet if we don't know the type. */
8031 if (dependent_type_p (type
))
8033 /* If DECL is declared constexpr, we'll do the appropriate checks
8034 in check_initializer. */
8035 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8037 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8039 if (!COMPLETE_TYPE_P (type
))
8040 error ("in-class initialization of static data member %q#D of "
8041 "incomplete type", decl
);
8042 else if (literal_type_p (type
))
8043 permerror (input_location
,
8044 "%<constexpr%> needed for in-class initialization of "
8045 "static data member %q#D of non-integral type", decl
);
8047 error ("in-class initialization of static data member %q#D of "
8048 "non-literal type", decl
);
8052 /* Motion 10 at San Diego: If a static const integral data member is
8053 initialized with an integral constant expression, the initializer
8054 may appear either in the declaration (within the class), or in
8055 the definition, but not both. If it appears in the class, the
8056 member is a member constant. The file-scope definition is always
8058 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8060 error ("invalid in-class initialization of static data member "
8061 "of non-integral type %qT",
8065 else if (!CP_TYPE_CONST_P (type
))
8066 error ("ISO C++ forbids in-class initialization of non-const "
8067 "static member %qD",
8069 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8070 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8071 "%qD of non-integral type %qT", decl
, type
);
8076 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8077 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8078 expressions out into temporary variables so that walk_tree doesn't
8079 step into them (c++/15764). */
8082 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8084 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8085 tree expr
= *expr_p
;
8086 if (TREE_CODE (expr
) == SAVE_EXPR
)
8088 tree op
= TREE_OPERAND (expr
, 0);
8089 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8090 if (TREE_SIDE_EFFECTS (op
))
8091 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8094 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8099 /* Entry point for the above. */
8102 stabilize_vla_size (tree size
)
8104 struct pointer_set_t
*pset
= pointer_set_create ();
8105 /* Break out any function calls into temporary variables. */
8106 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8107 pointer_set_destroy (pset
);
8110 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8111 not inside of SAVE_EXPR and fold them. */
8114 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8116 tree expr
= *expr_p
;
8117 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8119 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8121 *(bool *)data
= true;
8122 if (SIZEOF_EXPR_TYPE_P (expr
))
8123 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8124 SIZEOF_EXPR
, false);
8125 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8126 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8129 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8131 if (expr
== error_mark_node
)
8132 expr
= size_one_node
;
8139 /* Given the SIZE (i.e., number of elements) in an array, compute an
8140 appropriate index type for the array. If non-NULL, NAME is the
8141 name of the thing being declared. */
8144 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8148 tree abi_1_itype
= NULL_TREE
;
8150 if (error_operand_p (size
))
8151 return error_mark_node
;
8153 if (!type_dependent_expression_p (size
))
8155 tree type
= TREE_TYPE (size
);
8157 mark_rvalue_use (size
);
8159 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8160 && TREE_SIDE_EFFECTS (size
))
8161 /* In C++98, we mark a non-constant array bound with a magic
8162 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8165 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8167 if (CLASS_TYPE_P (type
)
8168 && CLASSTYPE_LITERAL_P (type
))
8170 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8173 if (!(complain
& tf_error
))
8174 return error_mark_node
;
8176 error ("size of array %qD has non-integral type %qT",
8179 error ("size of array has non-integral type %qT", type
);
8180 size
= integer_one_node
;
8182 if (size
== error_mark_node
)
8183 return error_mark_node
;
8184 type
= TREE_TYPE (size
);
8185 /* We didn't support this case in GCC 3.2, so don't bother
8186 trying to model it now in ABI v1. */
8187 abi_1_itype
= error_mark_node
;
8190 size
= maybe_constant_value (size
);
8191 if (!TREE_CONSTANT (size
))
8195 if (error_operand_p (size
))
8196 return error_mark_node
;
8198 /* The array bound must be an integer type. */
8199 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8201 if (!(complain
& tf_error
))
8202 return error_mark_node
;
8204 error ("size of array %qD has non-integral type %qT", name
, type
);
8206 error ("size of array has non-integral type %qT", type
);
8207 size
= integer_one_node
;
8208 type
= TREE_TYPE (size
);
8212 /* A type is dependent if it is...an array type constructed from any
8213 dependent type or whose size is specified by a constant expression
8214 that is value-dependent. */
8215 /* We can only call value_dependent_expression_p on integral constant
8216 expressions; treat non-constant expressions as dependent, too. */
8217 if (processing_template_decl
8218 && (type_dependent_expression_p (size
)
8219 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8221 /* We cannot do any checking for a SIZE that isn't known to be
8222 constant. Just build the index type and mark that it requires
8223 structural equality checks. */
8224 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8225 size
, size_one_node
));
8226 TYPE_DEPENDENT_P (itype
) = 1;
8227 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8228 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8232 if (!abi_version_at_least (2) && processing_template_decl
8233 && abi_1_itype
== NULL_TREE
)
8234 /* For abi-1, we handled all instances in templates the same way,
8235 even when they were non-dependent. This affects the manglings
8236 produced. So, we do the normal checking for non-dependent
8237 sizes, but at the end we'll return the same type that abi-1
8238 would have, but with TYPE_CANONICAL set to the "right"
8239 value that the current ABI would provide. */
8240 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8241 osize
, integer_one_node
));
8243 /* Normally, the array-bound will be a constant. */
8244 if (TREE_CODE (size
) == INTEGER_CST
)
8246 /* Check to see if the array bound overflowed. Make that an
8247 error, no matter how generous we're being. */
8248 constant_expression_error (size
);
8250 /* An array must have a positive number of elements. */
8251 if (INT_CST_LT (size
, integer_zero_node
))
8253 if (!(complain
& tf_error
))
8254 return error_mark_node
;
8256 error ("size of array %qD is negative", name
);
8258 error ("size of array is negative");
8259 size
= integer_one_node
;
8261 /* As an extension we allow zero-sized arrays. */
8262 else if (integer_zerop (size
))
8264 if (!(complain
& tf_error
))
8265 /* We must fail if performing argument deduction (as
8266 indicated by the state of complain), so that
8267 another substitution can be found. */
8268 return error_mark_node
;
8269 else if (in_system_header
)
8270 /* Allow them in system headers because glibc uses them. */;
8272 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8274 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8277 else if (TREE_CONSTANT (size
)
8278 /* We don't allow VLAs at non-function scopes, or during
8279 tentative template substitution. */
8280 || !at_function_scope_p ()
8281 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8283 if (!(complain
& tf_error
))
8284 return error_mark_node
;
8285 /* `(int) &fn' is not a valid array bound. */
8287 error ("size of array %qD is not an integral constant-expression",
8290 error ("size of array is not an integral constant-expression");
8291 size
= integer_one_node
;
8293 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8296 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8298 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8300 else if (warn_vla
> 0)
8304 "variable length array %qD is used", name
);
8307 "variable length array is used");
8310 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8311 /* A variable sized array. */
8312 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8315 HOST_WIDE_INT saved_processing_template_decl
;
8317 /* Compute the index of the largest element in the array. It is
8318 one less than the number of elements in the array. We save
8319 and restore PROCESSING_TEMPLATE_DECL so that computations in
8320 cp_build_binary_op will be appropriately folded. */
8321 saved_processing_template_decl
= processing_template_decl
;
8322 processing_template_decl
= 0;
8323 itype
= cp_build_binary_op (input_location
,
8325 cp_convert (ssizetype
, size
, complain
),
8326 cp_convert (ssizetype
, integer_one_node
,
8329 itype
= fold (itype
);
8330 processing_template_decl
= saved_processing_template_decl
;
8332 if (!TREE_CONSTANT (itype
))
8334 /* A variable sized array. */
8335 itype
= variable_size (itype
);
8336 if (TREE_CODE (itype
) != SAVE_EXPR
)
8338 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8339 they might survive till gimplification. */
8340 tree newitype
= itype
;
8342 cp_walk_tree_without_duplicates (&newitype
,
8343 fold_sizeof_expr_r
, &found
);
8345 itype
= variable_size (fold (newitype
));
8348 /* Make sure that there was no overflow when creating to a signed
8349 index type. (For example, on a 32-bit machine, an array with
8350 size 2^32 - 1 is too big.) */
8351 else if (TREE_CODE (itype
) == INTEGER_CST
8352 && TREE_OVERFLOW (itype
))
8354 if (!(complain
& tf_error
))
8355 return error_mark_node
;
8356 error ("overflow in array dimension");
8357 TREE_OVERFLOW (itype
) = 0;
8361 /* Create and return the appropriate index type. */
8362 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8364 tree t
= build_index_type (itype
);
8365 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8366 itype
= abi_1_itype
;
8369 itype
= build_index_type (itype
);
8371 /* If the index type were dependent, we would have returned early, so
8372 remember that it isn't. */
8373 TYPE_DEPENDENT_P (itype
) = 0;
8374 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8378 /* Returns the scope (if any) in which the entity declared by
8379 DECLARATOR will be located. If the entity was declared with an
8380 unqualified name, NULL_TREE is returned. */
8383 get_scope_of_declarator (const cp_declarator
*declarator
)
8385 while (declarator
&& declarator
->kind
!= cdk_id
)
8386 declarator
= declarator
->declarator
;
8388 /* If the declarator-id is a SCOPE_REF, the scope in which the
8389 declaration occurs is the first operand. */
8391 && declarator
->u
.id
.qualifying_scope
)
8392 return declarator
->u
.id
.qualifying_scope
;
8394 /* Otherwise, the declarator is not a qualified name; the entity will
8395 be declared in the current scope. */
8399 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8400 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8404 create_array_type_for_decl (tree name
, tree type
, tree size
)
8406 tree itype
= NULL_TREE
;
8408 /* If things have already gone awry, bail now. */
8409 if (type
== error_mark_node
|| size
== error_mark_node
)
8410 return error_mark_node
;
8412 /* 8.3.4/1: If the type of the identifier of D contains the auto
8413 type-specifier, the program is ill-formed. */
8414 if (pedantic
&& type_uses_auto (type
))
8415 pedwarn (input_location
, OPT_Wpedantic
,
8416 "declaration of %qD as array of %<auto%>", name
);
8418 /* If there are some types which cannot be array elements,
8419 issue an error-message and return. */
8420 switch (TREE_CODE (type
))
8424 error ("declaration of %qD as array of void", name
);
8426 error ("creating array of void");
8427 return error_mark_node
;
8431 error ("declaration of %qD as array of functions", name
);
8433 error ("creating array of functions");
8434 return error_mark_node
;
8436 case REFERENCE_TYPE
:
8438 error ("declaration of %qD as array of references", name
);
8440 error ("creating array of references");
8441 return error_mark_node
;
8445 error ("declaration of %qD as array of function members", name
);
8447 error ("creating array of function members");
8448 return error_mark_node
;
8456 The constant expressions that specify the bounds of the arrays
8457 can be omitted only for the first member of the sequence. */
8458 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8461 error ("declaration of %qD as multidimensional array must "
8462 "have bounds for all dimensions except the first",
8465 error ("multidimensional array must have bounds for all "
8466 "dimensions except the first");
8468 return error_mark_node
;
8471 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
8472 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8474 /* Figure out the index type for the array. */
8476 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8479 T is called the array element type; this type shall not be [...] an
8480 abstract class type. */
8481 abstract_virtuals_error (name
, type
);
8483 return build_cplus_array_type (type
, itype
);
8486 /* Check that it's OK to declare a function with the indicated TYPE.
8487 SFK indicates the kind of special function (if any) that this
8488 function is. OPTYPE is the type given in a conversion operator
8489 declaration, or the class type for a constructor/destructor.
8490 Returns the actual return type of the function; that
8491 may be different than TYPE if an error occurs, or for certain
8492 special functions. */
8495 check_special_function_return_type (special_function_kind sfk
,
8501 case sfk_constructor
:
8503 error ("return type specification for constructor invalid");
8505 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8506 type
= build_pointer_type (optype
);
8508 type
= void_type_node
;
8511 case sfk_destructor
:
8513 error ("return type specification for destructor invalid");
8514 /* We can't use the proper return type here because we run into
8515 problems with ambiguous bases and covariant returns.
8516 Java classes are left unchanged because (void *) isn't a valid
8517 Java type, and we don't want to change the Java ABI. */
8518 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8519 type
= build_pointer_type (void_type_node
);
8521 type
= void_type_node
;
8524 case sfk_conversion
:
8526 error ("return type specified for %<operator %T%>", optype
);
8537 /* A variable or data member (whose unqualified name is IDENTIFIER)
8538 has been declared with the indicated TYPE. If the TYPE is not
8539 acceptable, issue an error message and return a type to use for
8540 error-recovery purposes. */
8543 check_var_type (tree identifier
, tree type
)
8545 if (VOID_TYPE_P (type
))
8548 error ("unnamed variable or field declared void");
8549 else if (identifier_p (identifier
))
8551 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8552 error ("variable or field %qE declared void", identifier
);
8555 error ("variable or field declared void");
8556 type
= error_mark_node
;
8562 /* Functions for adjusting the visibility of a tagged type and its nested
8563 types when it gets a name for linkage purposes from a typedef. */
8565 static void bt_reset_linkage (binding_entry
, void *);
8567 reset_type_linkage (tree type
)
8569 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8570 if (CLASS_TYPE_P (type
))
8571 binding_table_foreach (CLASSTYPE_NESTED_UTDS (type
), bt_reset_linkage
, NULL
);
8574 bt_reset_linkage (binding_entry b
, void */
*data*/
)
8576 reset_type_linkage (b
->type
);
8579 /* Given declspecs and a declarator (abstract or otherwise), determine
8580 the name and type of the object declared and construct a DECL node
8583 DECLSPECS points to the representation of declaration-specifier
8584 sequence that precedes declarator.
8586 DECL_CONTEXT says which syntactic context this declaration is in:
8587 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8588 FUNCDEF for a function definition. Like NORMAL but a few different
8589 error messages in each case. Return value may be zero meaning
8590 this definition is too screwy to try to parse.
8591 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8592 handle member functions (which have FIELD context).
8593 Return value may be zero meaning this definition is too screwy to
8595 PARM for a parameter declaration (either within a function prototype
8596 or before a function body). Make a PARM_DECL, or return void_type_node.
8597 TPARM for a template parameter declaration.
8598 CATCHPARM for a parameter declaration before a catch clause.
8599 TYPENAME if for a typename (in a cast or sizeof).
8600 Don't make a DECL node; just return the ..._TYPE node.
8601 FIELD for a struct or union field; make a FIELD_DECL.
8602 BITFIELD for a field with specified width.
8604 INITIALIZED is as for start_decl.
8606 ATTRLIST is a pointer to the list of attributes, which may be NULL
8607 if there are none; *ATTRLIST may be modified if attributes from inside
8608 the declarator should be applied to the declaration.
8610 When this function is called, scoping variables (such as
8611 CURRENT_CLASS_TYPE) should reflect the scope in which the
8612 declaration occurs, not the scope in which the new declaration will
8613 be placed. For example, on:
8617 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8620 Returns a DECL (if a declarator is present), a TYPE (if there is no
8621 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8625 grokdeclarator (const cp_declarator
*declarator
,
8626 cp_decl_specifier_seq
*declspecs
,
8627 enum decl_context decl_context
,
8631 tree type
= NULL_TREE
;
8633 int explicit_int128
= 0;
8634 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8635 int explicit_int
= 0;
8636 int explicit_char
= 0;
8637 int defaulted_int
= 0;
8639 tree typedef_decl
= NULL_TREE
;
8640 const char *name
= NULL
;
8641 tree typedef_type
= NULL_TREE
;
8642 /* True if this declarator is a function definition. */
8643 bool funcdef_flag
= false;
8644 cp_declarator_kind innermost_code
= cdk_error
;
8647 /* See the code below that used this. */
8648 tree decl_attr
= NULL_TREE
;
8651 /* Keep track of what sort of function is being processed
8652 so that we can warn about default return values, or explicit
8653 return values which do not match prescribed defaults. */
8654 special_function_kind sfk
= sfk_none
;
8656 tree dname
= NULL_TREE
;
8657 tree ctor_return_type
= NULL_TREE
;
8658 enum overload_flags flags
= NO_SPECIAL
;
8659 /* cv-qualifiers that apply to the declarator, for a declaration of
8660 a member function. */
8661 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8662 /* virt-specifiers that apply to the declarator, for a declaration of
8663 a member function. */
8664 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8665 /* ref-qualifier that applies to the declarator, for a declaration of
8666 a member function. */
8667 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8668 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8670 tree raises
= NULL_TREE
;
8671 int template_count
= 0;
8672 tree returned_attrs
= NULL_TREE
;
8673 tree parms
= NULL_TREE
;
8674 const cp_declarator
*id_declarator
;
8675 /* The unqualified name of the declarator; either an
8676 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8677 tree unqualified_id
;
8678 /* The class type, if any, in which this entity is located,
8679 or NULL_TREE if none. Note that this value may be different from
8680 the current class type; for example if an attempt is made to declare
8681 "A::f" inside "B", this value will be "A". */
8682 tree ctype
= current_class_type
;
8683 /* The NAMESPACE_DECL for the namespace in which this entity is
8684 located. If an unqualified name is used to declare the entity,
8685 this value will be NULL_TREE, even if the entity is located at
8687 tree in_namespace
= NULL_TREE
;
8688 cp_storage_class storage_class
;
8689 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8690 bool type_was_error_mark_node
= false;
8691 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8692 bool template_type_arg
= false;
8693 bool template_parm_flag
= false;
8694 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8695 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8696 source_location saved_loc
= input_location
;
8699 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8700 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8701 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8702 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8703 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8704 explicit_int128
= declspecs
->explicit_int128_p
;
8705 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8707 if (decl_context
== FUNCDEF
)
8708 funcdef_flag
= true, decl_context
= NORMAL
;
8709 else if (decl_context
== MEMFUNCDEF
)
8710 funcdef_flag
= true, decl_context
= FIELD
;
8711 else if (decl_context
== BITFIELD
)
8712 bitfield
= 1, decl_context
= FIELD
;
8713 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8714 template_type_arg
= true, decl_context
= TYPENAME
;
8715 else if (decl_context
== TPARM
)
8716 template_parm_flag
= true, decl_context
= PARM
;
8718 if (initialized
> 1)
8719 funcdef_flag
= true;
8721 /* Look inside a declarator for the name being declared
8722 and get it as a string, for an error message. */
8723 for (id_declarator
= declarator
;
8725 id_declarator
= id_declarator
->declarator
)
8727 if (id_declarator
->kind
!= cdk_id
)
8728 innermost_code
= id_declarator
->kind
;
8730 switch (id_declarator
->kind
)
8733 if (id_declarator
->declarator
8734 && id_declarator
->declarator
->kind
== cdk_id
)
8736 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8737 if (sfk
== sfk_destructor
)
8744 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8745 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8748 if (qualifying_scope
)
8750 if (at_function_scope_p ())
8754 A declarator-id shall not be qualified except
8757 None of the cases are permitted in block
8759 if (qualifying_scope
== global_namespace
)
8760 error ("invalid use of qualified-name %<::%D%>",
8762 else if (TYPE_P (qualifying_scope
))
8763 error ("invalid use of qualified-name %<%T::%D%>",
8764 qualifying_scope
, decl
);
8766 error ("invalid use of qualified-name %<%D::%D%>",
8767 qualifying_scope
, decl
);
8768 return error_mark_node
;
8770 else if (TYPE_P (qualifying_scope
))
8772 ctype
= qualifying_scope
;
8773 if (!MAYBE_CLASS_TYPE_P (ctype
))
8775 error ("%q#T is not a class or a namespace", ctype
);
8778 else if (innermost_code
!= cdk_function
8779 && current_class_type
8780 && !uniquely_derived_from_p (ctype
,
8781 current_class_type
))
8783 error ("type %qT is not derived from type %qT",
8784 ctype
, current_class_type
);
8785 return error_mark_node
;
8788 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8789 in_namespace
= qualifying_scope
;
8791 switch (TREE_CODE (decl
))
8797 if (innermost_code
!= cdk_function
)
8799 error ("declaration of %qD as non-function", decl
);
8800 return error_mark_node
;
8802 else if (!qualifying_scope
8803 && !(current_class_type
&& at_class_scope_p ()))
8805 error ("declaration of %qD as non-member", decl
);
8806 return error_mark_node
;
8809 type
= TREE_OPERAND (decl
, 0);
8811 type
= constructor_name (type
);
8812 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8817 case TEMPLATE_ID_EXPR
:
8819 tree fns
= TREE_OPERAND (decl
, 0);
8822 if (!identifier_p (dname
))
8824 gcc_assert (is_overloaded_fn (dname
));
8825 dname
= DECL_NAME (get_first_fn (dname
));
8830 case IDENTIFIER_NODE
:
8831 if (identifier_p (decl
))
8834 if (C_IS_RESERVED_WORD (dname
))
8836 error ("declarator-id missing; using reserved word %qD",
8838 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8840 else if (!IDENTIFIER_TYPENAME_P (dname
))
8841 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8844 gcc_assert (flags
== NO_SPECIAL
);
8845 flags
= TYPENAME_FLAG
;
8846 ctor_return_type
= TREE_TYPE (dname
);
8847 sfk
= sfk_conversion
;
8848 if (is_typename_at_global_scope (dname
))
8849 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8851 name
= "<invalid operator>";
8868 return error_mark_node
;
8873 if (id_declarator
->kind
== cdk_id
)
8879 The declarator in a function-definition shall have the form
8880 D1 ( parameter-declaration-clause) ... */
8881 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8883 error ("function definition does not declare parameters");
8884 return error_mark_node
;
8887 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8888 && innermost_code
!= cdk_function
8889 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8891 error ("declaration of %qD as non-function", dname
);
8892 return error_mark_node
;
8896 && identifier_p (dname
)
8897 && UDLIT_OPER_P (dname
)
8898 && innermost_code
!= cdk_function
)
8900 error ("declaration of %qD as non-function", dname
);
8901 return error_mark_node
;
8904 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8908 error ("declaration of %qD as %<typedef%>", dname
);
8909 return error_mark_node
;
8911 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8913 error ("declaration of %qD as parameter", dname
);
8914 return error_mark_node
;
8918 /* Anything declared one level down from the top level
8919 must be one of the parameters of a function
8920 (because the body is at least two levels down). */
8922 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8923 by not allowing C++ class definitions to specify their parameters
8924 with xdecls (must be spec.d in the parmlist).
8926 Since we now wait to push a class scope until we are sure that
8927 we are in a legitimate method context, we must set oldcname
8928 explicitly (since current_class_name is not yet alive).
8930 We also want to avoid calling this a PARM if it is in a namespace. */
8932 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8934 cp_binding_level
*b
= current_binding_level
;
8935 current_binding_level
= b
->level_chain
;
8936 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8937 decl_context
= PARM
;
8938 current_binding_level
= b
;
8942 name
= decl_context
== PARM
? "parameter" : "type name";
8944 if (constexpr_p
&& typedef_p
)
8946 error ("%<constexpr%> cannot appear in a typedef declaration");
8947 return error_mark_node
;
8950 /* If there were multiple types specified in the decl-specifier-seq,
8951 issue an error message. */
8952 if (declspecs
->multiple_types_p
)
8954 error ("two or more data types in declaration of %qs", name
);
8955 return error_mark_node
;
8958 if (declspecs
->conflicting_specifiers_p
)
8960 error ("conflicting specifiers in declaration of %qs", name
);
8961 return error_mark_node
;
8964 /* Extract the basic type from the decl-specifier-seq. */
8965 type
= declspecs
->type
;
8966 if (type
== error_mark_node
)
8969 type_was_error_mark_node
= true;
8971 /* If the entire declaration is itself tagged as deprecated then
8972 suppress reports of deprecated items. */
8973 if (type
&& TREE_DEPRECATED (type
)
8974 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8975 warn_deprecated_use (type
, NULL_TREE
);
8976 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8978 typedef_decl
= type
;
8979 type
= TREE_TYPE (typedef_decl
);
8980 if (TREE_DEPRECATED (type
)
8981 && DECL_ARTIFICIAL (typedef_decl
)
8982 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8983 warn_deprecated_use (type
, NULL_TREE
);
8985 /* No type at all: default to `int', and set DEFAULTED_INT
8986 because it was not a user-defined typedef. */
8987 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8989 /* These imply 'int'. */
8990 type
= integer_type_node
;
8994 explicit_int
= declspecs
->explicit_int_p
;
8995 explicit_char
= declspecs
->explicit_char_p
;
8998 /* See the code below that used this. */
9000 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9002 typedef_type
= type
;
9005 if (sfk
!= sfk_conversion
)
9006 ctor_return_type
= ctype
;
9008 if (sfk
!= sfk_none
)
9009 type
= check_special_function_return_type (sfk
, type
,
9011 else if (type
== NULL_TREE
)
9017 /* We handle `main' specially here, because 'main () { }' is so
9018 common. With no options, it is allowed. With -Wreturn-type,
9019 it is a warning. It is only an error with -pedantic-errors. */
9020 is_main
= (funcdef_flag
9021 && dname
&& identifier_p (dname
)
9022 && MAIN_NAME_P (dname
)
9023 && ctype
== NULL_TREE
9024 && in_namespace
== NULL_TREE
9025 && current_namespace
== global_namespace
);
9027 if (type_was_error_mark_node
)
9028 /* We've already issued an error, don't complain more. */;
9029 else if (in_system_header
|| flag_ms_extensions
)
9030 /* Allow it, sigh. */;
9032 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9034 pedwarn (input_location
, OPT_Wpedantic
,
9035 "ISO C++ forbids declaration of %qs with no type", name
);
9037 warning (OPT_Wreturn_type
,
9038 "ISO C++ forbids declaration of %qs with no type", name
);
9040 type
= integer_type_node
;
9045 if (explicit_int128
)
9047 if (int128_integer_type_node
== NULL_TREE
)
9049 error ("%<__int128%> is not supported by this target");
9050 explicit_int128
= false;
9052 else if (pedantic
&& ! in_system_header
)
9053 pedwarn (input_location
, OPT_Wpedantic
,
9054 "ISO C++ does not support %<__int128%> for %qs", name
);
9057 /* Now process the modifiers that were specified
9058 and check for invalid combinations. */
9060 /* Long double is a special combination. */
9061 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9064 type
= cp_build_qualified_type (long_double_type_node
,
9065 cp_type_quals (type
));
9068 /* Check all other uses of type modifiers. */
9070 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9074 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9075 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9076 else if (signed_p
&& unsigned_p
)
9077 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9078 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9079 error ("%<long long%> invalid for %qs", name
);
9080 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9081 error ("%<long%> invalid for %qs", name
);
9082 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9083 error ("%<short%> invalid for %qs", name
);
9084 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9085 error ("%<long%> or %<short%> invalid for %qs", name
);
9086 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9087 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9088 else if ((long_p
|| short_p
) && explicit_char
)
9089 error ("%<long%> or %<short%> specified with char for %qs", name
);
9090 else if (long_p
&& short_p
)
9091 error ("%<long%> and %<short%> specified together for %qs", name
);
9092 else if (type
== char16_type_node
|| type
== char32_type_node
)
9094 if (signed_p
|| unsigned_p
)
9095 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9096 else if (short_p
|| long_p
)
9097 error ("%<short%> or %<long%> invalid for %qs", name
);
9102 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9104 pedwarn (input_location
, OPT_Wpedantic
,
9105 "long, short, signed or unsigned used invalidly for %qs",
9107 if (flag_pedantic_errors
)
9112 /* Discard the type modifiers if they are invalid. */
9123 /* Decide whether an integer type is signed or not.
9124 Optionally treat bitfields as signed by default. */
9128 It is implementation-defined whether a plain (neither
9129 explicitly signed or unsigned) char, short, int, or long
9130 bit-field is signed or unsigned.
9132 Naturally, we extend this to long long as well. Note that
9133 this does not include wchar_t. */
9134 || (bitfield
&& !flag_signed_bitfields
9136 /* A typedef for plain `int' without `signed' can be
9137 controlled just like plain `int', but a typedef for
9138 `signed int' cannot be so controlled. */
9140 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9141 && TREE_CODE (type
) == INTEGER_TYPE
9142 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9144 if (explicit_int128
)
9145 type
= int128_unsigned_type_node
;
9147 type
= long_long_unsigned_type_node
;
9149 type
= long_unsigned_type_node
;
9151 type
= short_unsigned_type_node
;
9152 else if (type
== char_type_node
)
9153 type
= unsigned_char_type_node
;
9154 else if (typedef_decl
)
9155 type
= unsigned_type_for (type
);
9157 type
= unsigned_type_node
;
9159 else if (signed_p
&& type
== char_type_node
)
9160 type
= signed_char_type_node
;
9161 else if (explicit_int128
)
9162 type
= int128_integer_type_node
;
9164 type
= long_long_integer_type_node
;
9166 type
= long_integer_type_node
;
9168 type
= short_integer_type_node
;
9170 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9172 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9173 error ("complex invalid for %qs", name
);
9174 /* If we just have "complex", it is equivalent to
9175 "complex double", but if any modifiers at all are specified it is
9176 the complex form of TYPE. E.g, "complex short" is
9177 "complex short int". */
9178 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9179 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9180 type
= complex_double_type_node
;
9181 else if (type
== integer_type_node
)
9182 type
= complex_integer_type_node
;
9183 else if (type
== float_type_node
)
9184 type
= complex_float_type_node
;
9185 else if (type
== double_type_node
)
9186 type
= complex_double_type_node
;
9187 else if (type
== long_double_type_node
)
9188 type
= complex_long_double_type_node
;
9190 type
= build_complex_type (type
);
9193 type_quals
= TYPE_UNQUALIFIED
;
9194 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9195 type_quals
|= TYPE_QUAL_CONST
;
9196 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9197 type_quals
|= TYPE_QUAL_VOLATILE
;
9198 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9199 type_quals
|= TYPE_QUAL_RESTRICT
;
9200 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9201 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9204 /* If we're using the injected-class-name to form a compound type or a
9205 declaration, replace it with the underlying class so we don't get
9206 redundant typedefs in the debug output. But if we are returning the
9207 type unchanged, leave it alone so that it's available to
9208 maybe_get_template_decl_from_type_decl. */
9209 if (CLASS_TYPE_P (type
)
9210 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9211 && type
== TREE_TYPE (TYPE_NAME (type
))
9212 && (declarator
|| type_quals
))
9213 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9215 type_quals
|= cp_type_quals (type
);
9216 type
= cp_build_qualified_type_real
9217 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9218 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9219 /* We might have ignored or rejected some of the qualifiers. */
9220 type_quals
= cp_type_quals (type
);
9223 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9224 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9225 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9227 storage_class
= declspecs
->storage_class
;
9228 if (storage_class
== sc_static
)
9229 staticp
= 1 + (decl_context
== FIELD
);
9231 if (virtualp
&& staticp
== 2)
9233 error ("member %qD cannot be declared both virtual and static", dname
);
9234 storage_class
= sc_none
;
9237 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9239 /* Issue errors about use of storage classes for parameters. */
9240 if (decl_context
== PARM
)
9244 error ("typedef declaration invalid in parameter declaration");
9245 return error_mark_node
;
9247 else if (template_parm_flag
&& storage_class
!= sc_none
)
9249 error ("storage class specified for template parameter %qs", name
);
9250 return error_mark_node
;
9252 else if (storage_class
== sc_static
9253 || storage_class
== sc_extern
9255 error ("storage class specifiers invalid in parameter declarations");
9257 /* Function parameters cannot be constexpr. If we saw one, moan
9258 and pretend it wasn't there. */
9261 error ("a parameter cannot be declared %<constexpr%>");
9266 /* Give error if `virtual' is used outside of class declaration. */
9268 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9270 error ("%<virtual%> outside class declaration");
9274 /* Static anonymous unions are dealt with here. */
9275 if (staticp
&& decl_context
== TYPENAME
9277 && ANON_AGGR_TYPE_P (declspecs
->type
))
9278 decl_context
= FIELD
;
9280 /* Warn about storage classes that are invalid for certain
9281 kinds of declarations (parameters, typenames, etc.). */
9284 && storage_class
!= sc_extern
9285 && storage_class
!= sc_static
)
9288 error ("multiple storage classes in declaration of %qs", name
);
9291 if (decl_context
!= NORMAL
9292 && ((storage_class
!= sc_none
9293 && storage_class
!= sc_mutable
)
9296 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9297 && (storage_class
== sc_register
9298 || storage_class
== sc_auto
))
9302 else if (decl_context
== FIELD
9303 /* C++ allows static class elements. */
9304 && storage_class
== sc_static
)
9305 /* C++ also allows inlines and signed and unsigned elements,
9306 but in those cases we don't come in here. */
9310 if (decl_context
== FIELD
)
9311 error ("storage class specified for %qs", name
);
9314 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9315 error ("storage class specified for parameter %qs", name
);
9317 error ("storage class specified for typename");
9319 if (storage_class
== sc_register
9320 || storage_class
== sc_auto
9321 || storage_class
== sc_extern
9323 storage_class
= sc_none
;
9326 else if (storage_class
== sc_extern
&& funcdef_flag
9327 && ! toplevel_bindings_p ())
9328 error ("nested function %qs declared %<extern%>", name
);
9329 else if (toplevel_bindings_p ())
9331 if (storage_class
== sc_auto
)
9332 error ("top-level declaration of %qs specifies %<auto%>", name
);
9335 && storage_class
!= sc_extern
9336 && storage_class
!= sc_static
)
9338 if (declspecs
->gnu_thread_keyword_p
)
9339 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9340 "declared %<__thread%>", name
);
9342 /* When thread_local is applied to a variable of block scope the
9343 storage-class-specifier static is implied if it does not appear
9345 storage_class
= declspecs
->storage_class
= sc_static
;
9349 if (storage_class
&& friendp
)
9351 error ("storage class specifiers invalid in friend function declarations");
9352 storage_class
= sc_none
;
9357 unqualified_id
= NULL_TREE
;
9360 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9361 switch (TREE_CODE (unqualified_id
))
9364 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9365 if (TYPE_P (unqualified_id
))
9366 unqualified_id
= constructor_name (unqualified_id
);
9369 case IDENTIFIER_NODE
:
9370 case TEMPLATE_ID_EXPR
:
9378 if (declspecs
->std_attributes
)
9380 /* Apply the c++11 attributes to the type preceding them. */
9381 input_location
= declspecs
->locations
[ds_std_attribute
];
9382 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9383 input_location
= saved_loc
;
9386 /* Determine the type of the entity declared by recurring on the
9388 for (; declarator
; declarator
= declarator
->declarator
)
9390 const cp_declarator
*inner_declarator
;
9393 if (type
== error_mark_node
)
9394 return error_mark_node
;
9396 attrs
= declarator
->attributes
;
9402 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9403 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9404 if (declarator
->kind
== cdk_function
)
9405 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9406 if (declarator
->kind
== cdk_array
)
9407 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9408 returned_attrs
= decl_attributes (&type
,
9409 chainon (returned_attrs
, attrs
),
9413 if (declarator
->kind
== cdk_id
)
9416 inner_declarator
= declarator
->declarator
;
9418 switch (declarator
->kind
)
9421 type
= create_array_type_for_decl (dname
, type
,
9422 declarator
->u
.array
.bounds
);
9423 if (declarator
->std_attributes
)
9426 The optional attribute-specifier-seq appertains to the
9428 returned_attrs
= chainon (returned_attrs
,
9429 declarator
->std_attributes
);
9437 /* Declaring a function type.
9438 Make sure we have a valid type for the function to return. */
9440 if (type_quals
!= TYPE_UNQUALIFIED
)
9442 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9443 warning (OPT_Wignored_qualifiers
,
9444 "type qualifiers ignored on function return type");
9445 /* We now know that the TYPE_QUALS don't apply to the
9446 decl, but to its return type. */
9447 type_quals
= TYPE_UNQUALIFIED
;
9449 errmsg
= targetm
.invalid_return_type (type
);
9453 type
= integer_type_node
;
9456 /* Error about some types functions can't return. */
9458 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9460 error ("%qs declared as function returning a function", name
);
9461 return error_mark_node
;
9463 if (TREE_CODE (type
) == ARRAY_TYPE
)
9465 error ("%qs declared as function returning an array", name
);
9466 return error_mark_node
;
9469 input_location
= declspecs
->locations
[ds_type_spec
];
9470 abstract_virtuals_error (ACU_RETURN
, type
);
9471 input_location
= saved_loc
;
9473 /* Pick up type qualifiers which should be applied to `this'. */
9474 memfn_quals
= declarator
->u
.function
.qualifiers
;
9475 /* Pick up virt-specifiers. */
9476 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9477 /* And ref-qualifier, too */
9478 rqual
= declarator
->u
.function
.ref_qualifier
;
9479 /* Pick up the exception specifications. */
9480 raises
= declarator
->u
.function
.exception_specification
;
9481 /* If the exception-specification is ill-formed, let's pretend
9482 there wasn't one. */
9483 if (raises
== error_mark_node
)
9486 /* Say it's a definition only for the CALL_EXPR
9487 closest to the identifier. */
9488 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9490 /* Handle a late-specified return type. */
9493 if (type_uses_auto (type
))
9495 if (!declarator
->u
.function
.late_return_type
)
9497 if (current_class_type
9498 && LAMBDA_TYPE_P (current_class_type
))
9499 /* OK for C++11 lambdas. */;
9500 else if (cxx_dialect
< cxx1y
)
9501 pedwarn (input_location
, 0, "%qs function uses "
9502 "%<auto%> type specifier without trailing "
9503 "return type", name
);
9505 permerror (input_location
, "virtual function cannot "
9506 "have deduced return type");
9508 else if (!is_auto (type
))
9510 error ("%qs function with trailing return type has"
9511 " %qT as its type rather than plain %<auto%>",
9513 return error_mark_node
;
9516 else if (declarator
->u
.function
.late_return_type
)
9518 if (cxx_dialect
< cxx11
)
9519 /* Not using maybe_warn_cpp0x because this should
9520 always be an error. */
9521 error ("trailing return type only available with "
9522 "-std=c++11 or -std=gnu++11");
9524 error ("%qs function with trailing return type not "
9525 "declared with %<auto%> type specifier", name
);
9526 return error_mark_node
;
9529 type
= splice_late_return_type
9530 (type
, declarator
->u
.function
.late_return_type
);
9531 if (type
== error_mark_node
)
9532 return error_mark_node
;
9534 if (ctype
== NULL_TREE
9535 && decl_context
== FIELD
9537 && (friendp
== 0 || dname
== current_class_name
))
9538 ctype
= current_class_type
;
9540 if (ctype
&& (sfk
== sfk_constructor
9541 || sfk
== sfk_destructor
))
9543 /* We are within a class's scope. If our declarator name
9544 is the same as the class name, and we are defining
9545 a function, then it is a constructor/destructor, and
9546 therefore returns a void type. */
9548 /* ISO C++ 12.4/2. A destructor may not be declared
9549 const or volatile. A destructor may not be static.
9550 A destructor may not be declared with ref-qualifier.
9552 ISO C++ 12.1. A constructor may not be declared
9553 const or volatile. A constructor may not be
9554 virtual. A constructor may not be static.
9555 A constructor may not be declared with ref-qualifier. */
9557 error ((flags
== DTOR_FLAG
)
9558 ? G_("destructor cannot be static member function")
9559 : G_("constructor cannot be static member function"));
9562 error ((flags
== DTOR_FLAG
)
9563 ? G_("destructors may not be cv-qualified")
9564 : G_("constructors may not be cv-qualified"));
9565 memfn_quals
= TYPE_UNQUALIFIED
;
9570 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9571 error ((flags
== DTOR_FLAG
)
9572 ? "destructors may not be ref-qualified"
9573 : "constructors may not be ref-qualified");
9574 rqual
= REF_QUAL_NONE
;
9577 if (decl_context
== FIELD
9578 && !member_function_or_else (ctype
,
9581 return error_mark_node
;
9583 if (flags
!= DTOR_FLAG
)
9585 /* It's a constructor. */
9590 permerror (input_location
, "constructors cannot be declared virtual");
9593 if (decl_context
== FIELD
9594 && sfk
!= sfk_constructor
)
9595 return error_mark_node
;
9597 if (decl_context
== FIELD
)
9603 error ("can%'t initialize friend function %qs", name
);
9606 /* Cannot be both friend and virtual. */
9607 error ("virtual functions cannot be friends");
9610 if (decl_context
== NORMAL
)
9611 error ("friend declaration not in class definition");
9612 if (current_function_decl
&& funcdef_flag
)
9613 error ("can%'t define friend function %qs in a local "
9617 else if (ctype
&& sfk
== sfk_conversion
)
9621 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9626 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9629 if (inner_declarator
9630 && inner_declarator
->kind
== cdk_id
9631 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9632 && arg_types
!= void_list_node
)
9634 error ("destructors may not have parameters");
9635 arg_types
= void_list_node
;
9639 type
= build_function_type (type
, arg_types
);
9640 if (declarator
->std_attributes
)
9643 The optional attribute-specifier-seq appertains to
9644 the function type. */
9645 decl_attributes (&type
, declarator
->std_attributes
,
9653 /* Filter out pointers-to-references and references-to-references.
9654 We can get these if a TYPE_DECL is used. */
9656 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9658 if (declarator
->kind
!= cdk_reference
)
9660 error ("cannot declare pointer to %q#T", type
);
9661 type
= TREE_TYPE (type
);
9664 /* In C++0x, we allow reference to reference declarations
9665 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9666 and template type arguments [14.3.1/4 temp.arg.type]. The
9667 check for direct reference to reference declarations, which
9668 are still forbidden, occurs below. Reasoning behind the change
9669 can be found in DR106, DR540, and the rvalue reference
9671 else if (cxx_dialect
== cxx98
)
9673 error ("cannot declare reference to %q#T", type
);
9674 type
= TREE_TYPE (type
);
9677 else if (VOID_TYPE_P (type
))
9679 if (declarator
->kind
== cdk_reference
)
9680 error ("cannot declare reference to %q#T", type
);
9681 else if (declarator
->kind
== cdk_ptrmem
)
9682 error ("cannot declare pointer to %q#T member", type
);
9685 /* We now know that the TYPE_QUALS don't apply to the decl,
9686 but to the target of the pointer. */
9687 type_quals
= TYPE_UNQUALIFIED
;
9689 /* This code used to handle METHOD_TYPE, but I don't think it's
9690 possible to get it here anymore. */
9691 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9692 if (declarator
->kind
== cdk_ptrmem
9693 && TREE_CODE (type
) == FUNCTION_TYPE
)
9695 memfn_quals
|= type_memfn_quals (type
);
9696 type
= build_memfn_type (type
,
9697 declarator
->u
.pointer
.class_type
,
9700 if (type
== error_mark_node
)
9701 return error_mark_node
;
9703 rqual
= REF_QUAL_NONE
;
9704 memfn_quals
= TYPE_UNQUALIFIED
;
9707 if (TREE_CODE (type
) == FUNCTION_TYPE
9708 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9709 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9710 error (declarator
->kind
== cdk_reference
9711 ? G_("cannot declare reference to qualified function type %qT")
9712 : G_("cannot declare pointer to qualified function type %qT"),
9715 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
9716 pedwarn (input_location
, OPT_Wvla
,
9717 declarator
->kind
== cdk_reference
9718 ? G_("reference to array of runtime bound")
9719 : G_("pointer to array of runtime bound"));
9721 /* When the pointed-to type involves components of variable size,
9722 care must be taken to ensure that the size evaluation code is
9723 emitted early enough to dominate all the possible later uses
9724 and late enough for the variables on which it depends to have
9727 This is expected to happen automatically when the pointed-to
9728 type has a name/declaration of it's own, but special attention
9729 is required if the type is anonymous.
9731 We handle the NORMAL and FIELD contexts here by inserting a
9732 dummy statement that just evaluates the size at a safe point
9733 and ensures it is not deferred until e.g. within a deeper
9734 conditional context (c++/43555).
9736 We expect nothing to be needed here for PARM or TYPENAME.
9737 Evaluating the size at this point for TYPENAME would
9738 actually be incorrect, as we might be in the middle of an
9739 expression with side effects on the pointed-to type size
9740 "arguments" prior to the pointer declaration point and the
9741 size evaluation could end up prior to the side effects. */
9743 if (!TYPE_NAME (type
)
9744 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9745 && at_function_scope_p ()
9746 && variably_modified_type_p (type
, NULL_TREE
))
9748 /* First break out any side-effects. */
9749 stabilize_vla_size (TYPE_SIZE (type
));
9750 /* And then force evaluation of the SAVE_EXPR. */
9751 finish_expr_stmt (TYPE_SIZE (type
));
9754 if (declarator
->kind
== cdk_reference
)
9756 /* In C++0x, the type we are creating a reference to might be
9757 a typedef which is itself a reference type. In that case,
9758 we follow the reference collapsing rules in
9759 [7.1.3/8 dcl.typedef] to create the final reference type:
9761 "If a typedef TD names a type that is a reference to a type
9762 T, an attempt to create the type 'lvalue reference to cv TD'
9763 creates the type 'lvalue reference to T,' while an attempt
9764 to create the type "rvalue reference to cv TD' creates the
9767 if (VOID_TYPE_P (type
))
9768 /* We already gave an error. */;
9769 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9771 if (declarator
->u
.reference
.rvalue_ref
)
9772 /* Leave type alone. */;
9774 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9777 type
= cp_build_reference_type
9778 (type
, declarator
->u
.reference
.rvalue_ref
);
9780 /* In C++0x, we need this check for direct reference to
9781 reference declarations, which are forbidden by
9782 [8.3.2/5 dcl.ref]. Reference to reference declarations
9783 are only allowed indirectly through typedefs and template
9784 type arguments. Example:
9786 void foo(int & &); // invalid ref-to-ref decl
9788 typedef int & int_ref;
9789 void foo(int_ref &); // valid ref-to-ref decl
9791 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9792 error ("cannot declare reference to %q#T, which is not "
9793 "a typedef or a template type argument", type
);
9795 else if (TREE_CODE (type
) == METHOD_TYPE
)
9796 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9797 else if (declarator
->kind
== cdk_ptrmem
)
9799 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9801 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9802 /* We will already have complained. */
9803 type
= error_mark_node
;
9805 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9809 type
= build_pointer_type (type
);
9811 /* Process a list of type modifier keywords (such as
9812 const or volatile) that were given inside the `*' or `&'. */
9814 if (declarator
->u
.pointer
.qualifiers
)
9817 = cp_build_qualified_type (type
,
9818 declarator
->u
.pointer
.qualifiers
);
9819 type_quals
= cp_type_quals (type
);
9822 /* Apply C++11 attributes to the pointer, and not to the
9823 type pointed to. This is unlike what is done for GNU
9824 attributes above. It is to comply with [dcl.ptr]/1:
9826 [the optional attribute-specifier-seq (7.6.1) appertains
9827 to the pointer and not to the object pointed to]. */
9828 if (declarator
->std_attributes
)
9829 decl_attributes (&type
, declarator
->std_attributes
,
9843 /* We need to stabilize side-effects in VLA sizes for regular array
9844 declarations too, not just pointers to arrays. */
9845 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9846 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9847 && at_function_scope_p ()
9848 && variably_modified_type_p (type
, NULL_TREE
))
9849 stabilize_vla_size (TYPE_SIZE (type
));
9851 /* A `constexpr' specifier used in an object declaration declares
9852 the object as `const'. */
9853 if (constexpr_p
&& innermost_code
!= cdk_function
)
9855 if (type_quals
& TYPE_QUAL_VOLATILE
)
9856 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9857 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9859 type_quals
|= TYPE_QUAL_CONST
;
9860 type
= cp_build_qualified_type (type
, type_quals
);
9864 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9865 && TREE_CODE (type
) != FUNCTION_TYPE
9866 && TREE_CODE (type
) != METHOD_TYPE
)
9868 error ("template-id %qD used as a declarator",
9870 unqualified_id
= dname
;
9873 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9874 qualified with a class-name, turn it into a METHOD_TYPE, unless
9875 we know that the function is static. We take advantage of this
9876 opportunity to do other processing that pertains to entities
9877 explicitly declared to be class members. Note that if DECLARATOR
9878 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9879 would not have exited the loop above. */
9881 && declarator
->u
.id
.qualifying_scope
9882 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9884 ctype
= declarator
->u
.id
.qualifying_scope
;
9885 ctype
= TYPE_MAIN_VARIANT (ctype
);
9886 template_count
= num_template_headers_for_class (ctype
);
9888 if (ctype
== current_class_type
)
9892 permerror (input_location
, "member functions are implicitly friends of their class");
9896 permerror (declarator
->id_loc
,
9897 "extra qualification %<%T::%> on member %qs",
9900 else if (/* If the qualifying type is already complete, then we
9901 can skip the following checks. */
9902 !COMPLETE_TYPE_P (ctype
)
9903 && (/* If the function is being defined, then
9904 qualifying type must certainly be complete. */
9906 /* A friend declaration of "T::f" is OK, even if
9907 "T" is a template parameter. But, if this
9908 function is not a friend, the qualifying type
9910 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9911 /* For a declaration, the type need not be
9912 complete, if either it is dependent (since there
9913 is no meaningful definition of complete in that
9914 case) or the qualifying class is currently being
9916 || !(dependent_type_p (ctype
)
9917 || currently_open_class (ctype
)))
9918 /* Check that the qualifying type is complete. */
9919 && !complete_type_or_else (ctype
, NULL_TREE
))
9920 return error_mark_node
;
9921 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9923 if (current_class_type
9924 && (!friendp
|| funcdef_flag
))
9927 ? G_("cannot define member function %<%T::%s%> "
9929 : G_("cannot declare member function %<%T::%s%> "
9931 ctype
, name
, current_class_type
);
9932 return error_mark_node
;
9935 else if (typedef_p
&& current_class_type
)
9937 error ("cannot declare member %<%T::%s%> within %qT",
9938 ctype
, name
, current_class_type
);
9939 return error_mark_node
;
9943 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9944 ctype
= current_class_type
;
9946 /* Now TYPE has the actual type. */
9951 *attrlist
= chainon (returned_attrs
, *attrlist
);
9953 attrlist
= &returned_attrs
;
9957 && declarator
->kind
== cdk_id
9958 && declarator
->std_attributes
)
9959 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
9960 a declarator-id appertains to the entity that is declared. */
9961 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
9963 /* Handle parameter packs. */
9964 if (parameter_pack_p
)
9966 if (decl_context
== PARM
)
9967 /* Turn the type into a pack expansion.*/
9968 type
= make_pack_expansion (type
);
9970 error ("non-parameter %qs cannot be a parameter pack", name
);
9973 /* Did array size calculations overflow or does the array cover more
9974 than half of the address-space? */
9975 if (TREE_CODE (type
) == ARRAY_TYPE
9976 && COMPLETE_TYPE_P (type
)
9977 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9978 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
9980 error ("size of array %qs is too large", name
);
9981 /* If we proceed with the array type as it is, we'll eventually
9982 crash in tree_low_cst(). */
9983 type
= error_mark_node
;
9986 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9987 && !processing_template_decl
9988 && variably_modified_type_p (type
, NULL_TREE
))
9990 if (decl_context
== FIELD
)
9991 error ("data member may not have variably modified type %qT", type
);
9993 error ("parameter may not have variably modified type %qT", type
);
9994 type
= error_mark_node
;
9997 if (explicitp
== 1 || (explicitp
&& friendp
))
9999 /* [dcl.fct.spec] The explicit specifier shall only be used in
10000 declarations of constructors within a class definition. */
10001 error ("only declarations of constructors can be %<explicit%>");
10005 if (storage_class
== sc_mutable
)
10007 if (decl_context
!= FIELD
|| friendp
)
10009 error ("non-member %qs cannot be declared %<mutable%>", name
);
10010 storage_class
= sc_none
;
10012 else if (decl_context
== TYPENAME
|| typedef_p
)
10014 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10015 storage_class
= sc_none
;
10017 else if (TREE_CODE (type
) == FUNCTION_TYPE
10018 || TREE_CODE (type
) == METHOD_TYPE
)
10020 error ("function %qs cannot be declared %<mutable%>", name
);
10021 storage_class
= sc_none
;
10025 error ("static %qs cannot be declared %<mutable%>", name
);
10026 storage_class
= sc_none
;
10028 else if (type_quals
& TYPE_QUAL_CONST
)
10030 error ("const %qs cannot be declared %<mutable%>", name
);
10031 storage_class
= sc_none
;
10033 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10035 permerror (input_location
, "reference %qs cannot be declared "
10036 "%<mutable%>", name
);
10037 storage_class
= sc_none
;
10041 /* If this is declaring a typedef name, return a TYPE_DECL. */
10042 if (typedef_p
&& decl_context
!= TYPENAME
)
10046 /* Note that the grammar rejects storage classes
10047 in typenames, fields or parameters. */
10048 if (current_lang_name
== lang_name_java
)
10049 TYPE_FOR_JAVA (type
) = 1;
10051 /* This declaration:
10053 typedef void f(int) const;
10055 declares a function type which is not a member of any
10056 particular class, but which is cv-qualified; for
10057 example "f S::*" declares a pointer to a const-qualified
10058 member function of S. We record the cv-qualification in the
10060 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10062 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10064 /* We have now dealt with these qualifiers. */
10065 memfn_quals
= TYPE_UNQUALIFIED
;
10066 rqual
= REF_QUAL_NONE
;
10069 if (type_uses_auto (type
))
10071 error ("typedef declared %<auto%>");
10072 type
= error_mark_node
;
10075 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
10076 pedwarn (input_location
, OPT_Wvla
,
10077 "typedef naming array of runtime bound");
10079 if (decl_context
== FIELD
)
10080 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10082 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10083 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10084 error_at (DECL_SOURCE_LOCATION (decl
),
10085 "typedef name may not be a nested-name-specifier");
10086 TREE_TYPE (decl
) = error_mark_node
;
10089 if (decl_context
!= FIELD
)
10091 if (!current_function_decl
)
10092 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10093 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10094 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10095 (current_function_decl
)))
10096 /* The TYPE_DECL is "abstract" because there will be
10097 clones of this constructor/destructor, and there will
10098 be copies of this TYPE_DECL generated in those
10100 DECL_ABSTRACT (decl
) = 1;
10102 else if (current_class_type
10103 && constructor_name_p (unqualified_id
, current_class_type
))
10104 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10105 "as enclosing class",
10108 /* If the user declares "typedef struct {...} foo" then the
10109 struct will have an anonymous name. Fill that name in now.
10110 Nothing can refer to it, so nothing needs know about the name
10112 if (type
!= error_mark_node
10114 && TYPE_NAME (type
)
10115 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10116 && TYPE_ANONYMOUS_P (type
)
10117 && declspecs
->type_definition_p
10118 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10122 /* Replace the anonymous name with the real name everywhere. */
10123 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10125 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10126 /* We do not rename the debug info representing the
10127 anonymous tagged type because the standard says in
10128 [dcl.typedef] that the naming applies only for
10129 linkage purposes. */
10130 /*debug_hooks->set_name (t, decl);*/
10131 TYPE_NAME (t
) = decl
;
10134 if (TYPE_LANG_SPECIFIC (type
))
10135 TYPE_WAS_ANONYMOUS (type
) = 1;
10137 /* If this is a typedef within a template class, the nested
10138 type is a (non-primary) template. The name for the
10139 template needs updating as well. */
10140 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10141 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10142 = TYPE_IDENTIFIER (type
);
10144 /* Adjust linkage now that we aren't anonymous anymore. */
10145 reset_type_linkage (type
);
10147 /* FIXME remangle member functions; member functions of a
10148 type with external linkage have external linkage. */
10152 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10153 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10155 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10156 memfn_quals
!= TYPE_UNQUALIFIED
,
10157 inlinep
, friendp
, raises
!= NULL_TREE
);
10159 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10160 /* Acknowledge that this was written:
10161 `using analias = atype;'. */
10162 TYPE_DECL_ALIAS_P (decl
) = 1;
10167 /* Detect the case of an array type of unspecified size
10168 which came, as such, direct from a typedef name.
10169 We must copy the type, so that the array's domain can be
10170 individually set by the object's initializer. */
10172 if (type
&& typedef_type
10173 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10174 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10175 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10177 /* Detect where we're using a typedef of function type to declare a
10178 function. PARMS will not be set, so we must create it now. */
10180 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10182 tree decls
= NULL_TREE
;
10185 for (args
= TYPE_ARG_TYPES (type
);
10186 args
&& args
!= void_list_node
;
10187 args
= TREE_CHAIN (args
))
10189 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10191 DECL_CHAIN (decl
) = decls
;
10195 parms
= nreverse (decls
);
10197 if (decl_context
!= TYPENAME
)
10199 /* A cv-qualifier-seq shall only be part of the function type
10200 for a non-static member function. A ref-qualifier shall only
10201 .... /same as above/ [dcl.fct] */
10202 if ((type_memfn_quals (type
) != TYPE_UNQUALIFIED
10203 || type_memfn_rqual (type
) != REF_QUAL_NONE
)
10204 && (current_class_type
== NULL_TREE
|| staticp
) )
10207 ? G_("qualified function types cannot be used to "
10208 "declare static member functions")
10209 : G_("qualified function types cannot be used to "
10210 "declare free functions"));
10211 type
= TYPE_MAIN_VARIANT (type
);
10214 /* The qualifiers on the function type become the qualifiers on
10215 the non-static member function. */
10216 memfn_quals
|= type_memfn_quals (type
);
10217 rqual
= type_memfn_rqual (type
);
10218 type_quals
= TYPE_UNQUALIFIED
;
10222 /* If this is a type name (such as, in a cast or sizeof),
10223 compute the type and return it now. */
10225 if (decl_context
== TYPENAME
)
10227 /* Note that the grammar rejects storage classes
10228 in typenames, fields or parameters. */
10229 if (type_quals
!= TYPE_UNQUALIFIED
)
10230 type_quals
= TYPE_UNQUALIFIED
;
10232 /* Special case: "friend class foo" looks like a TYPENAME context. */
10235 if (type_quals
!= TYPE_UNQUALIFIED
)
10237 error ("type qualifiers specified for friend class declaration");
10238 type_quals
= TYPE_UNQUALIFIED
;
10242 error ("%<inline%> specified for friend class declaration");
10248 /* Don't allow friend declaration without a class-key. */
10249 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10250 permerror (input_location
, "template parameters cannot be friends");
10251 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10252 permerror (input_location
, "friend declaration requires class-key, "
10253 "i.e. %<friend class %T::%D%>",
10254 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10256 permerror (input_location
, "friend declaration requires class-key, "
10257 "i.e. %<friend %#T%>",
10261 /* Only try to do this stuff if we didn't already give up. */
10262 if (type
!= integer_type_node
)
10264 /* A friendly class? */
10265 if (current_class_type
)
10266 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10267 /*complain=*/true);
10269 error ("trying to make class %qT a friend of global scope",
10272 type
= void_type_node
;
10275 else if (memfn_quals
|| rqual
)
10277 if (ctype
== NULL_TREE
10278 && TREE_CODE (type
) == METHOD_TYPE
)
10279 ctype
= TYPE_METHOD_BASETYPE (type
);
10282 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10283 /* Core issue #547: need to allow this in template type args.
10284 Allow it in general in C++11 for alias-declarations. */
10285 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10286 && TREE_CODE (type
) == FUNCTION_TYPE
)
10287 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10289 error ("invalid qualifiers on non-member function type");
10294 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10295 && decl_context
!= CATCHPARM
10296 && TREE_CODE (type
) != UNION_TYPE
10299 error ("abstract declarator %qT used as declaration", type
);
10300 return error_mark_node
;
10303 /* Only functions may be declared using an operator-function-id. */
10305 && IDENTIFIER_OPNAME_P (unqualified_id
)
10306 && TREE_CODE (type
) != FUNCTION_TYPE
10307 && TREE_CODE (type
) != METHOD_TYPE
)
10309 error ("declaration of %qD as non-function", unqualified_id
);
10310 return error_mark_node
;
10313 /* We don't check parameter types here because we can emit a better
10314 error message later. */
10315 if (decl_context
!= PARM
)
10317 type
= check_var_type (unqualified_id
, type
);
10318 if (type
== error_mark_node
)
10319 return error_mark_node
;
10322 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10323 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10325 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10327 if (ctype
|| in_namespace
)
10328 error ("cannot use %<::%> in parameter declaration");
10330 if (type_uses_auto (type
))
10332 error ("parameter declared %<auto%>");
10333 type
= error_mark_node
;
10336 /* A parameter declared as an array of T is really a pointer to T.
10337 One declared as a function is really a pointer to a function.
10338 One declared as a member is really a pointer to member. */
10340 if (TREE_CODE (type
) == ARRAY_TYPE
)
10342 /* Transfer const-ness of array into that of type pointed to. */
10343 type
= build_pointer_type (TREE_TYPE (type
));
10344 type_quals
= TYPE_UNQUALIFIED
;
10346 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10347 type
= build_pointer_type (type
);
10350 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10351 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10353 cp_cv_quals real_quals
= memfn_quals
;
10354 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10355 real_quals
|= TYPE_QUAL_CONST
;
10356 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10362 if (decl_context
== PARM
)
10364 decl
= cp_build_parm_decl (unqualified_id
, type
);
10366 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10367 memfn_quals
!= TYPE_UNQUALIFIED
,
10368 inlinep
, friendp
, raises
!= NULL_TREE
);
10370 else if (decl_context
== FIELD
)
10372 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10373 && type_uses_auto (type
))
10375 error ("non-static data member declared %<auto%>");
10376 type
= error_mark_node
;
10379 /* The C99 flexible array extension. */
10380 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10381 && TYPE_DOMAIN (type
) == NULL_TREE
)
10383 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10384 tf_warning_or_error
);
10385 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10388 if (type
== error_mark_node
)
10390 /* Happens when declaring arrays of sizes which
10391 are error_mark_node, for example. */
10394 else if (in_namespace
&& !friendp
)
10396 /* Something like struct S { int N::j; }; */
10397 error ("invalid use of %<::%>");
10398 return error_mark_node
;
10400 else if (TREE_CODE (type
) == FUNCTION_TYPE
10401 || TREE_CODE (type
) == METHOD_TYPE
)
10404 tree function_context
;
10408 /* This should never happen in pure C++ (the check
10409 could be an assert). It could happen in
10410 Objective-C++ if someone writes invalid code that
10411 uses a function declaration for an instance
10412 variable or property (instance variables and
10413 properties are parsed as FIELD_DECLs, but they are
10414 part of an Objective-C class, not a C++ class).
10415 That code is invalid and is caught by this
10419 error ("declaration of function %qD in invalid context",
10421 return error_mark_node
;
10424 /* ``A union may [ ... ] not [ have ] virtual functions.''
10426 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10428 error ("function %qD declared virtual inside a union",
10430 return error_mark_node
;
10433 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10437 error ("%qD cannot be declared virtual, since it "
10438 "is always static",
10445 /* Check that the name used for a destructor makes sense. */
10446 if (sfk
== sfk_destructor
)
10448 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10452 gcc_assert (friendp
);
10453 error ("expected qualified name in friend declaration "
10454 "for destructor %qD", uqname
);
10455 return error_mark_node
;
10458 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10460 error ("declaration of %qD as member of %qT",
10462 return error_mark_node
;
10466 error ("a destructor cannot be %<constexpr%>");
10467 return error_mark_node
;
10470 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10472 error ("expected qualified name in friend declaration "
10473 "for constructor %qD",
10474 id_declarator
->u
.id
.unqualified_name
);
10475 return error_mark_node
;
10478 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10479 function_context
= (ctype
!= NULL_TREE
) ?
10480 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10481 publicp
= (! friendp
|| ! staticp
)
10482 && function_context
== NULL_TREE
;
10483 decl
= grokfndecl (ctype
, type
,
10484 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10485 ? unqualified_id
: dname
,
10488 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10489 friendp
? -1 : 0, friendp
, publicp
,
10490 inlinep
| (2 * constexpr_p
),
10492 funcdef_flag
, template_count
, in_namespace
,
10493 attrlist
, declarator
->id_loc
);
10494 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10495 if (decl
== NULL_TREE
)
10496 return error_mark_node
;
10498 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10499 /* The decl and setting of decl_attr is also turned off. */
10500 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10503 /* [class.conv.ctor]
10505 A constructor declared without the function-specifier
10506 explicit that can be called with a single parameter
10507 specifies a conversion from the type of its first
10508 parameter to the type of its class. Such a constructor
10509 is called a converting constructor. */
10510 if (explicitp
== 2)
10511 DECL_NONCONVERTING_P (decl
) = 1;
10513 else if (!staticp
&& !dependent_type_p (type
)
10514 && !COMPLETE_TYPE_P (complete_type (type
))
10515 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10517 if (unqualified_id
)
10518 error ("field %qD has incomplete type %qT",
10519 unqualified_id
, type
);
10521 error ("name %qT has incomplete type", type
);
10523 type
= error_mark_node
;
10530 error ("%qE is neither function nor member function; "
10531 "cannot be declared friend", unqualified_id
);
10539 /* Friends are treated specially. */
10540 if (ctype
== current_class_type
)
10541 ; /* We already issued a permerror. */
10542 else if (decl
&& DECL_NAME (decl
))
10544 if (template_class_depth (current_class_type
) == 0)
10546 decl
= check_explicit_specialization
10547 (unqualified_id
, decl
, template_count
,
10548 2 * funcdef_flag
+ 4);
10549 if (decl
== error_mark_node
)
10550 return error_mark_node
;
10553 decl
= do_friend (ctype
, unqualified_id
, decl
,
10559 return error_mark_node
;
10562 /* Structure field. It may not be a function, except for C++. */
10564 if (decl
== NULL_TREE
)
10568 /* C++ allows static class members. All other work
10569 for this is done by grokfield. */
10570 decl
= build_lang_decl_loc (declarator
->id_loc
,
10571 VAR_DECL
, unqualified_id
, type
);
10572 set_linkage_for_static_data_member (decl
);
10573 /* Even if there is an in-class initialization, DECL
10574 is considered undefined until an out-of-class
10575 definition is provided. */
10576 DECL_EXTERNAL (decl
) = 1;
10580 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10581 if (declspecs
->gnu_thread_keyword_p
)
10582 DECL_GNU_TLS_P (decl
) = true;
10585 if (constexpr_p
&& !initialized
)
10587 error ("constexpr static data member %qD must have an "
10588 "initializer", decl
);
10589 constexpr_p
= false;
10596 error ("non-static data member %qE declared %<constexpr%>",
10598 constexpr_p
= false;
10600 decl
= build_decl (input_location
,
10601 FIELD_DECL
, unqualified_id
, type
);
10602 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10603 if (bitfield
&& !unqualified_id
)
10604 TREE_NO_WARNING (decl
) = 1;
10606 if (storage_class
== sc_mutable
)
10608 DECL_MUTABLE_P (decl
) = 1;
10609 storage_class
= sc_none
;
10614 /* An attempt is being made to initialize a non-static
10615 member. This is new in C++11. */
10616 maybe_warn_cpp0x (CPP0X_NSDMI
);
10618 /* If this has been parsed with static storage class, but
10619 errors forced staticp to be cleared, ensure NSDMI is
10621 if (declspecs
->storage_class
== sc_static
)
10622 DECL_INITIAL (decl
) = error_mark_node
;
10626 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10627 memfn_quals
!= TYPE_UNQUALIFIED
,
10628 inlinep
, friendp
, raises
!= NULL_TREE
);
10631 else if (TREE_CODE (type
) == FUNCTION_TYPE
10632 || TREE_CODE (type
) == METHOD_TYPE
)
10634 tree original_name
;
10637 if (!unqualified_id
)
10638 return error_mark_node
;
10640 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10641 original_name
= dname
;
10643 original_name
= unqualified_id
;
10645 if (storage_class
== sc_auto
)
10646 error ("storage class %<auto%> invalid for function %qs", name
);
10647 else if (storage_class
== sc_register
)
10648 error ("storage class %<register%> invalid for function %qs", name
);
10651 if (declspecs
->gnu_thread_keyword_p
)
10652 error ("storage class %<__thread%> invalid for function %qs",
10655 error ("storage class %<thread_local%> invalid for function %qs",
10659 if (virt_specifiers
)
10660 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10661 /* Function declaration not at top level.
10662 Storage classes other than `extern' are not allowed
10663 and `extern' makes no difference. */
10664 if (! toplevel_bindings_p ()
10665 && (storage_class
== sc_static
10666 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10669 if (storage_class
== sc_static
)
10670 pedwarn (input_location
, OPT_Wpedantic
,
10671 "%<static%> specified invalid for function %qs "
10672 "declared out of global scope", name
);
10674 pedwarn (input_location
, OPT_Wpedantic
,
10675 "%<inline%> specifier invalid for function %qs "
10676 "declared out of global scope", name
);
10679 if (ctype
== NULL_TREE
)
10683 error ("virtual non-class function %qs", name
);
10686 else if (sfk
== sfk_constructor
10687 || sfk
== sfk_destructor
)
10689 error (funcdef_flag
10690 ? G_("%qs defined in a non-class scope")
10691 : G_("%qs declared in a non-class scope"), name
);
10696 /* Record whether the function is public. */
10697 publicp
= (ctype
!= NULL_TREE
10698 || storage_class
!= sc_static
);
10700 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10701 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10703 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10705 template_count
, in_namespace
, attrlist
,
10706 declarator
->id_loc
);
10707 if (decl
== NULL_TREE
)
10708 return error_mark_node
;
10712 int invalid_static
= 0;
10714 /* Don't allow a static member function in a class, and forbid
10715 declaring main to be static. */
10716 if (TREE_CODE (type
) == METHOD_TYPE
)
10718 permerror (input_location
, "cannot declare member function %qD to have "
10719 "static linkage", decl
);
10720 invalid_static
= 1;
10722 else if (current_function_decl
)
10724 /* FIXME need arm citation */
10725 error ("cannot declare static function inside another function");
10726 invalid_static
= 1;
10729 if (invalid_static
)
10732 storage_class
= sc_none
;
10738 /* It's a variable. */
10740 /* An uninitialized decl with `extern' is a reference. */
10741 decl
= grokvardecl (type
, unqualified_id
,
10744 (type_quals
& TYPE_QUAL_CONST
) != 0,
10745 ctype
? ctype
: in_namespace
);
10746 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10747 memfn_quals
!= TYPE_UNQUALIFIED
,
10748 inlinep
, friendp
, raises
!= NULL_TREE
);
10752 DECL_CONTEXT (decl
) = ctype
;
10755 permerror (input_location
, "%<static%> may not be used when defining "
10756 "(as opposed to declaring) a static data member");
10758 storage_class
= sc_none
;
10760 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10762 error ("static member %qD declared %<register%>", decl
);
10763 storage_class
= sc_none
;
10765 if (storage_class
== sc_extern
&& pedantic
)
10767 pedwarn (input_location
, OPT_Wpedantic
,
10768 "cannot explicitly declare member %q#D to have "
10769 "extern linkage", decl
);
10770 storage_class
= sc_none
;
10773 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10775 error ("declaration of constexpr variable %qD is not a definition",
10777 constexpr_p
= false;
10781 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10783 if (toplevel_bindings_p ())
10785 /* It's common practice (and completely valid) to have a const
10786 be initialized and declared extern. */
10787 if (!(type_quals
& TYPE_QUAL_CONST
))
10788 warning (0, "%qs initialized and declared %<extern%>", name
);
10792 error ("%qs has both %<extern%> and initializer", name
);
10793 return error_mark_node
;
10797 /* Record `register' declaration for warnings on &
10798 and in case doing stupid register allocation. */
10800 if (storage_class
== sc_register
)
10801 DECL_REGISTER (decl
) = 1;
10802 else if (storage_class
== sc_extern
)
10803 DECL_THIS_EXTERN (decl
) = 1;
10804 else if (storage_class
== sc_static
)
10805 DECL_THIS_STATIC (decl
) = 1;
10807 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10808 if (constexpr_p
&& VAR_P (decl
))
10809 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10811 /* Record constancy and volatility on the DECL itself . There's
10812 no need to do this when processing a template; we'll do this
10813 for the instantiated declaration based on the type of DECL. */
10814 if (!processing_template_decl
)
10815 cp_apply_type_quals_to_decl (type_quals
, decl
);
10821 /* Subroutine of start_function. Ensure that each of the parameter
10822 types (as listed in PARMS) is complete, as is required for a
10823 function definition. */
10826 require_complete_types_for_parms (tree parms
)
10828 for (; parms
; parms
= DECL_CHAIN (parms
))
10830 if (dependent_type_p (TREE_TYPE (parms
)))
10832 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10833 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10835 relayout_decl (parms
);
10836 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10839 /* grokparms or complete_type_or_else will have already issued
10841 TREE_TYPE (parms
) = error_mark_node
;
10845 /* Returns nonzero if T is a local variable. */
10848 local_variable_p (const_tree t
)
10851 /* A VAR_DECL with a context that is a _TYPE is a static data
10853 && !TYPE_P (CP_DECL_CONTEXT (t
))
10854 /* Any other non-local variable must be at namespace scope. */
10855 && !DECL_NAMESPACE_SCOPE_P (t
))
10856 || (TREE_CODE (t
) == PARM_DECL
))
10862 /* Like local_variable_p, but suitable for use as a tree-walking
10866 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10869 if (local_variable_p (*tp
)
10870 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
10872 else if (TYPE_P (*tp
))
10873 *walk_subtrees
= 0;
10878 /* Check that ARG, which is a default-argument expression for a
10879 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10880 something goes wrong. DECL may also be a _TYPE node, rather than a
10881 DECL, if there is no DECL available. */
10884 check_default_argument (tree decl
, tree arg
)
10889 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10890 /* We get a DEFAULT_ARG when looking at an in-class declaration
10891 with a default argument. Ignore the argument for now; we'll
10892 deal with it after the class is complete. */
10901 decl_type
= TREE_TYPE (decl
);
10903 if (arg
== error_mark_node
10904 || decl
== error_mark_node
10905 || TREE_TYPE (arg
) == error_mark_node
10906 || decl_type
== error_mark_node
)
10907 /* Something already went wrong. There's no need to check
10909 return error_mark_node
;
10911 /* [dcl.fct.default]
10913 A default argument expression is implicitly converted to the
10915 ++cp_unevaluated_operand
;
10916 perform_implicit_conversion_flags (decl_type
, arg
, tf_warning_or_error
,
10918 --cp_unevaluated_operand
;
10920 if (warn_zero_as_null_pointer_constant
10921 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10922 && null_ptr_cst_p (arg
)
10923 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
10924 return nullptr_node
;
10926 /* [dcl.fct.default]
10928 Local variables shall not be used in default argument
10931 The keyword `this' shall not be used in a default argument of a
10932 member function. */
10933 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10936 if (DECL_NAME (var
) == this_identifier
)
10937 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10939 error ("default argument %qE uses local variable %qD", arg
, var
);
10940 return error_mark_node
;
10947 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10950 type_is_deprecated (tree type
)
10952 enum tree_code code
;
10953 if (TREE_DEPRECATED (type
))
10955 if (TYPE_NAME (type
)
10956 && TREE_DEPRECATED (TYPE_NAME (type
)))
10959 /* Do warn about using typedefs to a deprecated class. */
10960 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10961 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10963 code
= TREE_CODE (type
);
10965 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10966 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10967 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10968 return type_is_deprecated (TREE_TYPE (type
));
10970 if (TYPE_PTRMEMFUNC_P (type
))
10971 return type_is_deprecated
10972 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10977 /* Decode the list of parameter types for a function type.
10978 Given the list of things declared inside the parens,
10979 return a list of types.
10981 If this parameter does not end with an ellipsis, we append
10984 *PARMS is set to the chain of PARM_DECLs created. */
10987 grokparms (tree parmlist
, tree
*parms
)
10989 tree result
= NULL_TREE
;
10990 tree decls
= NULL_TREE
;
10994 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10996 tree type
= NULL_TREE
;
10997 tree init
= TREE_PURPOSE (parm
);
10998 tree decl
= TREE_VALUE (parm
);
10999 const char *errmsg
;
11001 if (parm
== void_list_node
)
11004 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11007 type
= TREE_TYPE (decl
);
11008 if (VOID_TYPE_P (type
))
11010 if (same_type_p (type
, void_type_node
)
11011 && DECL_SELF_REFERENCE_P (type
)
11012 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11013 /* this is a parmlist of `(void)', which is ok. */
11015 cxx_incomplete_type_error (decl
, type
);
11016 /* It's not a good idea to actually create parameters of
11017 type `void'; other parts of the compiler assume that a
11018 void type terminates the parameter list. */
11019 type
= error_mark_node
;
11020 TREE_TYPE (decl
) = error_mark_node
;
11023 if (type
!= error_mark_node
11024 && TYPE_FOR_JAVA (type
)
11025 && MAYBE_CLASS_TYPE_P (type
))
11027 error ("parameter %qD has Java class type", decl
);
11028 type
= error_mark_node
;
11029 TREE_TYPE (decl
) = error_mark_node
;
11033 if (type
!= error_mark_node
11034 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11037 type
= error_mark_node
;
11038 TREE_TYPE (decl
) = error_mark_node
;
11041 if (type
!= error_mark_node
)
11043 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11045 tree deptype
= type_is_deprecated (type
);
11047 warn_deprecated_use (deptype
, NULL_TREE
);
11050 /* Top-level qualifiers on the parameters are
11051 ignored for function types. */
11052 type
= cp_build_qualified_type (type
, 0);
11053 if (TREE_CODE (type
) == METHOD_TYPE
)
11055 error ("parameter %qD invalidly declared method type", decl
);
11056 type
= build_pointer_type (type
);
11057 TREE_TYPE (decl
) = type
;
11059 else if (abstract_virtuals_error (decl
, type
))
11060 any_error
= 1; /* Seems like a good idea. */
11061 else if (POINTER_TYPE_P (type
))
11063 /* [dcl.fct]/6, parameter types cannot contain pointers
11064 (references) to arrays of unknown bound. */
11065 tree t
= TREE_TYPE (type
);
11066 int ptr
= TYPE_PTR_P (type
);
11070 if (TYPE_PTR_P (t
))
11072 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11074 else if (!TYPE_DOMAIN (t
))
11078 if (TREE_CODE (t
) == ARRAY_TYPE
)
11080 ? G_("parameter %qD includes pointer to array of "
11081 "unknown bound %qT")
11082 : G_("parameter %qD includes reference to array of "
11083 "unknown bound %qT"),
11089 else if (init
&& !processing_template_decl
)
11090 init
= check_default_argument (decl
, init
);
11093 DECL_CHAIN (decl
) = decls
;
11095 result
= tree_cons (init
, type
, result
);
11097 decls
= nreverse (decls
);
11098 result
= nreverse (result
);
11100 result
= chainon (result
, void_list_node
);
11107 /* D is a constructor or overloaded `operator='.
11109 Let T be the class in which D is declared. Then, this function
11112 -1 if D's is an ill-formed constructor or copy assignment operator
11113 whose first parameter is of type `T'.
11114 0 if D is not a copy constructor or copy assignment
11116 1 if D is a copy constructor or copy assignment operator whose
11117 first parameter is a reference to non-const qualified T.
11118 2 if D is a copy constructor or copy assignment operator whose
11119 first parameter is a reference to const qualified T.
11121 This function can be used as a predicate. Positive values indicate
11122 a copy constructor and nonzero values indicate a copy assignment
11126 copy_fn_p (const_tree d
)
11132 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11134 if (TREE_CODE (d
) == TEMPLATE_DECL
11135 || (DECL_TEMPLATE_INFO (d
)
11136 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11137 /* Instantiations of template member functions are never copy
11138 functions. Note that member functions of templated classes are
11139 represented as template functions internally, and we must
11140 accept those as copy functions. */
11143 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11147 arg_type
= TREE_VALUE (args
);
11148 if (arg_type
== error_mark_node
)
11151 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11153 /* Pass by value copy assignment operator. */
11156 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11157 && !TYPE_REF_IS_RVALUE (arg_type
)
11158 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11160 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11166 args
= TREE_CHAIN (args
);
11168 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11169 /* There are more non-optional args. */
11175 /* D is a constructor or overloaded `operator='.
11177 Let T be the class in which D is declared. Then, this function
11178 returns true when D is a move constructor or move assignment
11179 operator, false otherwise. */
11182 move_fn_p (const_tree d
)
11184 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11186 if (cxx_dialect
== cxx98
)
11187 /* There are no move constructors if we are in C++98 mode. */
11190 if (TREE_CODE (d
) == TEMPLATE_DECL
11191 || (DECL_TEMPLATE_INFO (d
)
11192 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11193 /* Instantiations of template member functions are never move
11194 functions. Note that member functions of templated classes are
11195 represented as template functions internally, and we must
11196 accept those as move functions. */
11199 return move_signature_fn_p (d
);
11202 /* D is a constructor or overloaded `operator='.
11204 Then, this function returns true when D has the same signature as a move
11205 constructor or move assignment operator (because either it is such a
11206 ctor/op= or it is a template specialization with the same signature),
11207 false otherwise. */
11210 move_signature_fn_p (const_tree d
)
11214 bool result
= false;
11216 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11220 arg_type
= TREE_VALUE (args
);
11221 if (arg_type
== error_mark_node
)
11224 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11225 && TYPE_REF_IS_RVALUE (arg_type
)
11226 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11230 args
= TREE_CHAIN (args
);
11232 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11233 /* There are more non-optional args. */
11239 /* Remember any special properties of member function DECL. */
11242 grok_special_member_properties (tree decl
)
11246 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11249 class_type
= DECL_CONTEXT (decl
);
11250 if (DECL_CONSTRUCTOR_P (decl
))
11252 int ctor
= copy_fn_p (decl
);
11254 if (!DECL_ARTIFICIAL (decl
))
11255 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11261 A non-template constructor for class X is a copy
11262 constructor if its first parameter is of type X&, const
11263 X&, volatile X& or const volatile X&, and either there
11264 are no other parameters or else all other parameters have
11265 default arguments. */
11266 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11267 if (user_provided_p (decl
))
11268 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11270 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11272 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11274 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11275 if (user_provided_p (decl
))
11276 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11278 else if (move_fn_p (decl
) && user_provided_p (decl
))
11279 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11280 else if (is_list_ctor (decl
))
11281 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11283 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11284 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11285 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11287 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11291 A non-template assignment operator for class X is a copy
11292 assignment operator if its parameter is of type X, X&, const
11293 X&, volatile X& or const volatile X&. */
11295 int assop
= copy_fn_p (decl
);
11299 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11300 if (user_provided_p (decl
))
11301 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11303 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11305 else if (move_fn_p (decl
) && user_provided_p (decl
))
11306 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11308 /* Destructors are handled in check_methods. */
11311 /* Check a constructor DECL has the correct form. Complains
11312 if the class has a constructor of the form X(X). */
11315 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11317 int ctor_parm
= copy_fn_p (decl
);
11323 A declaration of a constructor for a class X is ill-formed if
11324 its first parameter is of type (optionally cv-qualified) X
11325 and either there are no other parameters or else all other
11326 parameters have default arguments.
11328 We *don't* complain about member template instantiations that
11329 have this form, though; they can occur as we try to decide
11330 what constructor to use during overload resolution. Since
11331 overload resolution will never prefer such a constructor to
11332 the non-template copy constructor (which is either explicitly
11333 or implicitly defined), there's no need to worry about their
11334 existence. Theoretically, they should never even be
11335 instantiated, but that's hard to forestall. */
11336 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11344 /* An operator with this code is unary, but can also be binary. */
11347 ambi_op_p (enum tree_code code
)
11349 return (code
== INDIRECT_REF
11350 || code
== ADDR_EXPR
11351 || code
== UNARY_PLUS_EXPR
11352 || code
== NEGATE_EXPR
11353 || code
== PREINCREMENT_EXPR
11354 || code
== PREDECREMENT_EXPR
);
11357 /* An operator with this name can only be unary. */
11360 unary_op_p (enum tree_code code
)
11362 return (code
== TRUTH_NOT_EXPR
11363 || code
== BIT_NOT_EXPR
11364 || code
== COMPONENT_REF
11365 || code
== TYPE_EXPR
);
11368 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11369 errors are issued for invalid declarations. */
11372 grok_op_properties (tree decl
, bool complain
)
11374 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11376 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11377 tree name
= DECL_NAME (decl
);
11378 enum tree_code operator_code
;
11383 /* Count the number of arguments and check for ellipsis. */
11384 for (argtype
= argtypes
, arity
= 0;
11385 argtype
&& argtype
!= void_list_node
;
11386 argtype
= TREE_CHAIN (argtype
))
11388 ellipsis_p
= !argtype
;
11390 class_type
= DECL_CONTEXT (decl
);
11391 if (class_type
&& !CLASS_TYPE_P (class_type
))
11392 class_type
= NULL_TREE
;
11394 if (DECL_CONV_FN_P (decl
))
11395 operator_code
= TYPE_EXPR
;
11399 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11400 if (ansi_opname (CODE) == name) \
11402 operator_code = (CODE); \
11405 else if (ansi_assopname (CODE) == name) \
11407 operator_code = (CODE); \
11408 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11412 #include "operators.def"
11413 #undef DEF_OPERATOR
11415 gcc_unreachable ();
11418 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11419 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11422 switch (operator_code
)
11425 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11429 TYPE_GETS_DELETE (class_type
) |= 1;
11433 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11436 case VEC_DELETE_EXPR
:
11437 TYPE_GETS_DELETE (class_type
) |= 2;
11444 /* [basic.std.dynamic.allocation]/1:
11446 A program is ill-formed if an allocation function is declared
11447 in a namespace scope other than global scope or declared static
11450 The same also holds true for deallocation functions. */
11451 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11452 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11454 if (DECL_NAMESPACE_SCOPE_P (decl
))
11456 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11458 error ("%qD may not be declared within a namespace", decl
);
11461 else if (!TREE_PUBLIC (decl
))
11463 error ("%qD may not be declared as static", decl
);
11469 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11471 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11472 DECL_IS_OPERATOR_NEW (decl
) = 1;
11474 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11475 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11478 /* An operator function must either be a non-static member function
11479 or have at least one parameter of a class, a reference to a class,
11480 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11481 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11483 if (operator_code
== TYPE_EXPR
11484 || operator_code
== CALL_EXPR
11485 || operator_code
== COMPONENT_REF
11486 || operator_code
== ARRAY_REF
11487 || operator_code
== NOP_EXPR
)
11489 error ("%qD must be a nonstatic member function", decl
);
11496 if (DECL_STATIC_FUNCTION_P (decl
))
11498 error ("%qD must be either a non-static member "
11499 "function or a non-member function", decl
);
11503 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11505 tree arg
= non_reference (TREE_VALUE (p
));
11506 if (arg
== error_mark_node
)
11509 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11510 because these checks are performed even on
11511 template functions. */
11512 if (MAYBE_CLASS_TYPE_P (arg
)
11513 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11517 if (!p
|| p
== void_list_node
)
11520 error ("%qD must have an argument of class or "
11521 "enumerated type", decl
);
11527 /* There are no restrictions on the arguments to an overloaded
11529 if (operator_code
== CALL_EXPR
)
11532 /* Warn about conversion operators that will never be used. */
11533 if (IDENTIFIER_TYPENAME_P (name
)
11534 && ! DECL_TEMPLATE_INFO (decl
)
11536 /* Warn only declaring the function; there is no need to
11537 warn again about out-of-class definitions. */
11538 && class_type
== current_class_type
)
11540 tree t
= TREE_TYPE (name
);
11541 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11544 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11546 if (VOID_TYPE_P (t
))
11547 warning (OPT_Wconversion
,
11549 ? G_("conversion to a reference to void "
11550 "will never use a type conversion operator")
11551 : G_("conversion to void "
11552 "will never use a type conversion operator"));
11553 else if (class_type
)
11555 if (t
== class_type
)
11556 warning (OPT_Wconversion
,
11558 ? G_("conversion to a reference to the same type "
11559 "will never use a type conversion operator")
11560 : G_("conversion to the same type "
11561 "will never use a type conversion operator"));
11562 /* Don't force t to be complete here. */
11563 else if (MAYBE_CLASS_TYPE_P (t
)
11564 && COMPLETE_TYPE_P (t
)
11565 && DERIVED_FROM_P (t
, class_type
))
11566 warning (OPT_Wconversion
,
11568 ? G_("conversion to a reference to a base class "
11569 "will never use a type conversion operator")
11570 : G_("conversion to a base class "
11571 "will never use a type conversion operator"));
11576 if (operator_code
== COND_EXPR
)
11579 error ("ISO C++ prohibits overloading operator ?:");
11582 else if (ellipsis_p
)
11584 error ("%qD must not have variable number of arguments", decl
);
11587 else if (ambi_op_p (operator_code
))
11590 /* We pick the one-argument operator codes by default, so
11591 we don't have to change anything. */
11593 else if (arity
== 2)
11595 /* If we thought this was a unary operator, we now know
11596 it to be a binary operator. */
11597 switch (operator_code
)
11600 operator_code
= MULT_EXPR
;
11604 operator_code
= BIT_AND_EXPR
;
11607 case UNARY_PLUS_EXPR
:
11608 operator_code
= PLUS_EXPR
;
11612 operator_code
= MINUS_EXPR
;
11615 case PREINCREMENT_EXPR
:
11616 operator_code
= POSTINCREMENT_EXPR
;
11619 case PREDECREMENT_EXPR
:
11620 operator_code
= POSTDECREMENT_EXPR
;
11624 gcc_unreachable ();
11627 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11629 if ((operator_code
== POSTINCREMENT_EXPR
11630 || operator_code
== POSTDECREMENT_EXPR
)
11631 && ! processing_template_decl
11632 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11635 error ("postfix %qD must take %<int%> as its argument",
11638 error ("postfix %qD must take %<int%> as its second "
11646 error ("%qD must take either zero or one argument", decl
);
11648 error ("%qD must take either one or two arguments", decl
);
11652 /* More Effective C++ rule 6. */
11654 && (operator_code
== POSTINCREMENT_EXPR
11655 || operator_code
== POSTDECREMENT_EXPR
11656 || operator_code
== PREINCREMENT_EXPR
11657 || operator_code
== PREDECREMENT_EXPR
))
11659 tree arg
= TREE_VALUE (argtypes
);
11660 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11661 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11662 arg
= TREE_TYPE (arg
);
11663 arg
= TYPE_MAIN_VARIANT (arg
);
11664 if (operator_code
== PREINCREMENT_EXPR
11665 || operator_code
== PREDECREMENT_EXPR
)
11667 if (TREE_CODE (ret
) != REFERENCE_TYPE
11668 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11670 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11671 build_reference_type (arg
));
11675 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11676 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11680 else if (unary_op_p (operator_code
))
11685 error ("%qD must take %<void%>", decl
);
11687 error ("%qD must take exactly one argument", decl
);
11691 else /* if (binary_op_p (operator_code)) */
11696 error ("%qD must take exactly one argument", decl
);
11698 error ("%qD must take exactly two arguments", decl
);
11702 /* More Effective C++ rule 7. */
11704 && (operator_code
== TRUTH_ANDIF_EXPR
11705 || operator_code
== TRUTH_ORIF_EXPR
11706 || operator_code
== COMPOUND_EXPR
))
11707 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11711 /* Effective C++ rule 23. */
11714 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11715 && (operator_code
== PLUS_EXPR
11716 || operator_code
== MINUS_EXPR
11717 || operator_code
== TRUNC_DIV_EXPR
11718 || operator_code
== MULT_EXPR
11719 || operator_code
== TRUNC_MOD_EXPR
)
11720 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11721 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11723 /* [over.oper]/8 */
11724 for (; argtypes
&& argtypes
!= void_list_node
;
11725 argtypes
= TREE_CHAIN (argtypes
))
11726 if (TREE_PURPOSE (argtypes
))
11728 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11729 if (operator_code
== POSTINCREMENT_EXPR
11730 || operator_code
== POSTDECREMENT_EXPR
)
11732 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11737 error ("%qD cannot have default arguments", decl
);
11745 /* Return a string giving the keyword associate with CODE. */
11747 static const char *
11748 tag_name (enum tag_types code
)
11760 case typename_type
:
11763 gcc_unreachable ();
11767 /* Name lookup in an elaborated-type-specifier (after the keyword
11768 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11769 elaborated-type-specifier is invalid, issue a diagnostic and return
11770 error_mark_node; otherwise, return the *_TYPE to which it referred.
11771 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11774 check_elaborated_type_specifier (enum tag_types tag_code
,
11776 bool allow_template_p
)
11782 struct S { struct S *p; };
11784 name lookup will find the TYPE_DECL for the implicit "S::S"
11785 typedef. Adjust for that here. */
11786 if (DECL_SELF_REFERENCE_P (decl
))
11787 decl
= TYPE_NAME (TREE_TYPE (decl
));
11789 type
= TREE_TYPE (decl
);
11791 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11792 is false for this case as well. */
11793 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11795 error ("using template type parameter %qT after %qs",
11796 type
, tag_name (tag_code
));
11797 return error_mark_node
;
11799 /* Accept template template parameters. */
11800 else if (allow_template_p
11801 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11802 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11806 If the identifier resolves to a typedef-name or the
11807 simple-template-id resolves to an alias template
11808 specialization, the elaborated-type-specifier is ill-formed.
11810 In other words, the only legitimate declaration to use in the
11811 elaborated type specifier is the implicit typedef created when
11812 the type is declared. */
11813 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11814 && !DECL_SELF_REFERENCE_P (decl
)
11815 && tag_code
!= typename_type
)
11817 if (alias_template_specialization_p (type
))
11818 error ("using alias template specialization %qT after %qs",
11819 type
, tag_name (tag_code
));
11821 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11822 inform (DECL_SOURCE_LOCATION (decl
),
11823 "%qD has a previous declaration here", decl
);
11824 return error_mark_node
;
11826 else if (TREE_CODE (type
) != RECORD_TYPE
11827 && TREE_CODE (type
) != UNION_TYPE
11828 && tag_code
!= enum_type
11829 && tag_code
!= typename_type
)
11831 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11832 error ("%q+T has a previous declaration here", type
);
11833 return error_mark_node
;
11835 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11836 && tag_code
== enum_type
)
11838 error ("%qT referred to as enum", type
);
11839 error ("%q+T has a previous declaration here", type
);
11840 return error_mark_node
;
11842 else if (!allow_template_p
11843 && TREE_CODE (type
) == RECORD_TYPE
11844 && CLASSTYPE_IS_TEMPLATE (type
))
11846 /* If a class template appears as elaborated type specifier
11847 without a template header such as:
11849 template <class T> class C {};
11850 void f(class C); // No template header here
11852 then the required template argument is missing. */
11853 error ("template argument required for %<%s %T%>",
11854 tag_name (tag_code
),
11855 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11856 return error_mark_node
;
11862 /* Lookup NAME in elaborate type specifier in scope according to
11863 SCOPE and issue diagnostics if necessary.
11864 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11865 found, and ERROR_MARK_NODE for type error. */
11868 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11869 tag_scope scope
, bool template_header_p
)
11873 if (scope
== ts_global
)
11875 /* First try ordinary name lookup, ignoring hidden class name
11876 injected via friend declaration. */
11877 decl
= lookup_name_prefer_type (name
, 2);
11878 /* If that fails, the name will be placed in the smallest
11879 non-class, non-function-prototype scope according to 3.3.1/5.
11880 We may already have a hidden name declared as friend in this
11881 scope. So lookup again but not ignoring hidden names.
11882 If we find one, that name will be made visible rather than
11883 creating a new tag. */
11885 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11888 decl
= lookup_type_scope (name
, scope
);
11891 && (DECL_CLASS_TEMPLATE_P (decl
)
11892 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11893 decl
= DECL_TEMPLATE_RESULT (decl
);
11895 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11897 /* Look for invalid nested type:
11901 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11903 error ("%qD has the same name as the class in which it is "
11906 return error_mark_node
;
11909 /* Two cases we need to consider when deciding if a class
11910 template is allowed as an elaborated type specifier:
11911 1. It is a self reference to its own class.
11912 2. It comes with a template header.
11916 template <class T> class C {
11917 class C *c1; // DECL_SELF_REFERENCE_P is true
11920 template <class U> class C; // template_header_p is true
11921 template <class T> class C<T>::D {
11922 class C *c2; // DECL_SELF_REFERENCE_P is true
11925 t
= check_elaborated_type_specifier (tag_code
,
11928 | DECL_SELF_REFERENCE_P (decl
));
11931 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11933 error ("reference to %qD is ambiguous", name
);
11934 print_candidates (decl
);
11935 return error_mark_node
;
11941 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11942 Define the tag as a forward-reference if it is not defined.
11944 If a declaration is given, process it here, and report an error if
11945 multiple declarations are not identical.
11947 SCOPE is TS_CURRENT when this is also a definition. Only look in
11948 the current frame for the name (since C++ allows new names in any
11949 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11950 declaration. Only look beginning from the current scope outward up
11951 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11953 TEMPLATE_HEADER_P is true when this declaration is preceded by
11954 a set of template parameters. */
11957 xref_tag_1 (enum tag_types tag_code
, tree name
,
11958 tag_scope orig_scope
, bool template_header_p
)
11960 enum tree_code code
;
11962 tree context
= NULL_TREE
;
11965 gcc_assert (identifier_p (name
));
11971 code
= RECORD_TYPE
;
11977 code
= ENUMERAL_TYPE
;
11980 gcc_unreachable ();
11983 if (orig_scope
== ts_lambda
)
11984 scope
= ts_current
;
11986 scope
= orig_scope
;
11988 /* In case of anonymous name, xref_tag is only called to
11989 make type node and push name. Name lookup is not required. */
11990 if (ANON_AGGRNAME_P (name
))
11993 t
= lookup_and_check_tag (tag_code
, name
,
11994 scope
, template_header_p
);
11996 if (t
== error_mark_node
)
11997 return error_mark_node
;
11999 if (scope
!= ts_current
&& t
&& current_class_type
12000 && template_class_depth (current_class_type
)
12001 && template_header_p
)
12003 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12006 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12007 definition of this tag. Since, in addition, we are currently
12008 processing a (member) template declaration of a template
12009 class, we must be very careful; consider:
12016 { template <class V>
12017 friend struct S1; };
12019 Here, the S2::S1 declaration should not be confused with the
12020 outer declaration. In particular, the inner version should
12021 have a template parameter of level 2, not level 1. This
12022 would be particularly important if the member declaration
12025 template <class V = U> friend struct S1;
12027 say, when we should tsubst into `U' when instantiating
12028 S2. On the other hand, when presented with:
12038 we must find the inner binding eventually. We
12039 accomplish this by making sure that the new type we
12040 create to represent this declaration has the right
12042 context
= TYPE_CONTEXT (t
);
12048 /* If no such tag is yet defined, create a forward-reference node
12049 and record it as the "definition".
12050 When a real declaration of this type is found,
12051 the forward-reference will be altered into a real type. */
12052 if (code
== ENUMERAL_TYPE
)
12054 error ("use of enum %q#D without previous declaration", name
);
12055 return error_mark_node
;
12059 t
= make_class_type (code
);
12060 TYPE_CONTEXT (t
) = context
;
12061 if (orig_scope
== ts_lambda
)
12062 /* Remember that we're declaring a lambda to avoid bogus errors
12063 in push_template_decl. */
12064 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12065 t
= pushtag (name
, t
, scope
);
12070 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12072 if (!redeclare_class_template (t
, current_template_parms
))
12073 return error_mark_node
;
12075 else if (!processing_template_decl
12076 && CLASS_TYPE_P (t
)
12077 && CLASSTYPE_IS_TEMPLATE (t
))
12079 error ("redeclaration of %qT as a non-template", t
);
12080 error ("previous declaration %q+D", t
);
12081 return error_mark_node
;
12084 /* Make injected friend class visible. */
12085 if (scope
!= ts_within_enclosing_non_class
12086 && hidden_name_p (TYPE_NAME (t
)))
12088 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12089 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12091 if (TYPE_TEMPLATE_INFO (t
))
12093 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12094 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12102 /* Wrapper for xref_tag_1. */
12105 xref_tag (enum tag_types tag_code
, tree name
,
12106 tag_scope scope
, bool template_header_p
)
12110 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12111 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12112 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12118 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12120 enum tag_types tag_kind
;
12122 if (TREE_CODE (old
) == RECORD_TYPE
)
12123 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12125 tag_kind
= union_type
;
12127 if (id
== NULL_TREE
)
12128 id
= TYPE_IDENTIFIER (old
);
12130 return xref_tag (tag_kind
, id
, scope
, false);
12133 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12134 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12135 access_* node, and the TREE_VALUE is the type of the base-class.
12136 Non-NULL TREE_TYPE indicates virtual inheritance.
12138 Returns true if the binfo hierarchy was successfully created,
12139 false if an error was detected. */
12142 xref_basetypes (tree ref
, tree base_list
)
12145 tree binfo
, base_binfo
;
12146 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12147 unsigned max_bases
= 0; /* Maximum direct bases. */
12149 tree default_access
;
12150 tree igo_prev
; /* Track Inheritance Graph Order. */
12152 if (ref
== error_mark_node
)
12155 /* The base of a derived class is private by default, all others are
12157 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12158 && CLASSTYPE_DECLARED_CLASS (ref
)
12159 ? access_private_node
: access_public_node
);
12161 /* First, make sure that any templates in base-classes are
12162 instantiated. This ensures that if we call ourselves recursively
12163 we do not get confused about which classes are marked and which
12165 basep
= &base_list
;
12168 tree basetype
= TREE_VALUE (*basep
);
12170 /* The dependent_type_p call below should really be dependent_scope_p
12171 so that we give a hard error about using an incomplete type as a
12172 base, but we allow it with a pedwarn for backward
12174 if (processing_template_decl
12175 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12176 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12177 if (!dependent_type_p (basetype
)
12178 && !complete_type_or_else (basetype
, NULL
))
12179 /* An incomplete type. Remove it from the list. */
12180 *basep
= TREE_CHAIN (*basep
);
12184 if (TREE_TYPE (*basep
))
12186 if (CLASS_TYPE_P (basetype
))
12187 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12188 basep
= &TREE_CHAIN (*basep
);
12192 TYPE_MARKED_P (ref
) = 1;
12194 /* The binfo slot should be empty, unless this is an (ill-formed)
12196 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12198 error ("redefinition of %q#T", ref
);
12202 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12204 binfo
= make_tree_binfo (max_bases
);
12206 TYPE_BINFO (ref
) = binfo
;
12207 BINFO_OFFSET (binfo
) = size_zero_node
;
12208 BINFO_TYPE (binfo
) = ref
;
12210 /* Apply base-class info set up to the variants of this type. */
12211 fixup_type_variants (ref
);
12215 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12216 /* An aggregate cannot have baseclasses. */
12217 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12219 if (TREE_CODE (ref
) == UNION_TYPE
)
12221 error ("derived union %qT invalid", ref
);
12228 if (TYPE_FOR_JAVA (ref
))
12230 error ("Java class %qT cannot have multiple bases", ref
);
12237 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12239 if (TYPE_FOR_JAVA (ref
))
12241 error ("Java class %qT cannot have virtual bases", ref
);
12246 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12248 tree access
= TREE_PURPOSE (base_list
);
12249 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12250 tree basetype
= TREE_VALUE (base_list
);
12252 if (access
== access_default_node
)
12253 access
= default_access
;
12255 if (PACK_EXPANSION_P (basetype
))
12256 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12257 if (TREE_CODE (basetype
) == TYPE_DECL
)
12258 basetype
= TREE_TYPE (basetype
);
12259 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12261 error ("base type %qT fails to be a struct or class type",
12266 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12267 TYPE_FOR_JAVA (ref
) = 1;
12269 base_binfo
= NULL_TREE
;
12270 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12272 base_binfo
= TYPE_BINFO (basetype
);
12273 /* The original basetype could have been a typedef'd type. */
12274 basetype
= BINFO_TYPE (base_binfo
);
12276 /* Inherit flags from the base. */
12277 TYPE_HAS_NEW_OPERATOR (ref
)
12278 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12279 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12280 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12281 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12282 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12283 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12284 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12285 CLASSTYPE_REPEATED_BASE_P (ref
)
12286 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12289 /* We must do this test after we've seen through a typedef
12291 if (TYPE_MARKED_P (basetype
))
12293 if (basetype
== ref
)
12294 error ("recursive type %qT undefined", basetype
);
12296 error ("duplicate base type %qT invalid", basetype
);
12300 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12301 /* Regenerate the pack expansion for the bases. */
12302 basetype
= make_pack_expansion (basetype
);
12304 TYPE_MARKED_P (basetype
) = 1;
12306 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12307 &igo_prev
, via_virtual
);
12308 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12309 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12311 BINFO_BASE_APPEND (binfo
, base_binfo
);
12312 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12315 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12316 /* If we didn't get max_vbases vbases, we must have shared at
12317 least one of them, and are therefore diamond shaped. */
12318 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12320 /* Unmark all the types. */
12321 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12322 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12323 TYPE_MARKED_P (ref
) = 0;
12325 /* Now see if we have a repeated base type. */
12326 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12328 for (base_binfo
= binfo
; base_binfo
;
12329 base_binfo
= TREE_CHAIN (base_binfo
))
12331 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12333 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12336 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12338 for (base_binfo
= binfo
; base_binfo
;
12339 base_binfo
= TREE_CHAIN (base_binfo
))
12340 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12341 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12350 /* Copies the enum-related properties from type SRC to type DST.
12351 Used with the underlying type of an enum and the enum itself. */
12353 copy_type_enum (tree dst
, tree src
)
12356 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12358 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12359 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12360 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12361 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12362 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12363 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12364 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12365 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12366 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12370 /* Begin compiling the definition of an enumeration type.
12373 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12375 UNDERLYING_TYPE is the type that will be used as the storage for
12376 the enumeration type. This should be NULL_TREE if no storage type
12379 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12381 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12383 Returns the type object, as yet incomplete.
12384 Also records info about it so that build_enumerator
12385 may be used to declare the individual values as they are read. */
12388 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12389 bool scoped_enum_p
, bool *is_new
)
12391 tree prevtype
= NULL_TREE
;
12392 gcc_assert (identifier_p (name
));
12396 /* [C++0x dcl.enum]p5:
12398 If not explicitly specified, the underlying type of a scoped
12399 enumeration type is int. */
12400 if (!underlying_type
&& scoped_enum_p
)
12401 underlying_type
= integer_type_node
;
12403 if (underlying_type
)
12404 underlying_type
= cv_unqualified (underlying_type
);
12406 /* If this is the real definition for a previous forward reference,
12407 fill in the contents in the same object that used to be the
12408 forward reference. */
12410 enumtype
= lookup_and_check_tag (enum_type
, name
,
12411 /*tag_scope=*/ts_current
,
12412 /*template_header_p=*/false);
12414 /* In case of a template_decl, the only check that should be deferred
12415 to instantiation time is the comparison of underlying types. */
12416 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12418 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12420 error_at (input_location
, "scoped/unscoped mismatch "
12421 "in enum %q#T", enumtype
);
12422 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12423 "previous definition here");
12424 enumtype
= error_mark_node
;
12426 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12428 error_at (input_location
, "underlying type mismatch "
12429 "in enum %q#T", enumtype
);
12430 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12431 "previous definition here");
12432 enumtype
= error_mark_node
;
12434 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12435 && !dependent_type_p (underlying_type
)
12436 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12437 && !same_type_p (underlying_type
,
12438 ENUM_UNDERLYING_TYPE (enumtype
)))
12440 error_at (input_location
, "different underlying type "
12441 "in enum %q#T", enumtype
);
12442 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12443 "previous definition here");
12444 underlying_type
= NULL_TREE
;
12448 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12449 || processing_template_decl
)
12451 /* In case of error, make a dummy enum to allow parsing to
12453 if (enumtype
== error_mark_node
)
12455 name
= make_anon_name ();
12456 enumtype
= NULL_TREE
;
12459 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12460 of an opaque enum, or an opaque enum of an already defined
12461 enumeration (C++0x only).
12462 In any other case, it'll be NULL_TREE. */
12468 prevtype
= enumtype
;
12470 /* Do not push the decl more than once, unless we need to
12471 compare underlying types at instantiation time */
12473 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12474 || (underlying_type
12475 && dependent_type_p (underlying_type
))
12476 || (ENUM_UNDERLYING_TYPE (enumtype
)
12477 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12479 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12480 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12483 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12486 if (enumtype
== error_mark_node
)
12487 return error_mark_node
;
12489 /* The enum is considered opaque until the opening '{' of the
12490 enumerator list. */
12491 SET_OPAQUE_ENUM_P (enumtype
, true);
12492 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12495 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12497 if (underlying_type
)
12499 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12501 copy_type_enum (enumtype
, underlying_type
);
12502 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12504 else if (dependent_type_p (underlying_type
))
12505 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12507 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12508 underlying_type
, enumtype
);
12511 /* If into a template class, the returned enum is always the first
12512 declaration (opaque or not) seen. This way all the references to
12513 this type will be to the same declaration. The following ones are used
12514 only to check for definition errors. */
12515 if (prevtype
&& processing_template_decl
)
12521 /* After processing and defining all the values of an enumeration type,
12522 install their decls in the enumeration type.
12523 ENUMTYPE is the type object. */
12526 finish_enum_value_list (tree enumtype
)
12529 tree underlying_type
;
12532 tree minnode
, maxnode
;
12535 bool fixed_underlying_type_p
12536 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12538 /* We built up the VALUES in reverse order. */
12539 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12541 /* For an enum defined in a template, just set the type of the values;
12542 all further processing is postponed until the template is
12543 instantiated. We need to set the type so that tsubst of a CONST_DECL
12545 if (processing_template_decl
)
12547 for (values
= TYPE_VALUES (enumtype
);
12549 values
= TREE_CHAIN (values
))
12550 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12554 /* Determine the minimum and maximum values of the enumerators. */
12555 if (TYPE_VALUES (enumtype
))
12557 minnode
= maxnode
= NULL_TREE
;
12559 for (values
= TYPE_VALUES (enumtype
);
12561 values
= TREE_CHAIN (values
))
12563 decl
= TREE_VALUE (values
);
12565 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12566 each enumerator has the type of its enumeration. Prior to the
12567 closing brace, the type of each enumerator is the type of its
12568 initializing value. */
12569 TREE_TYPE (decl
) = enumtype
;
12571 /* Update the minimum and maximum values, if appropriate. */
12572 value
= DECL_INITIAL (decl
);
12573 if (value
== error_mark_node
)
12574 value
= integer_zero_node
;
12575 /* Figure out what the minimum and maximum values of the
12576 enumerators are. */
12578 minnode
= maxnode
= value
;
12579 else if (tree_int_cst_lt (maxnode
, value
))
12581 else if (tree_int_cst_lt (value
, minnode
))
12588 If the enumerator-list is empty, the underlying type is as if
12589 the enumeration had a single enumerator with value 0. */
12590 minnode
= maxnode
= integer_zero_node
;
12592 if (!fixed_underlying_type_p
)
12594 /* Compute the number of bits require to represent all values of the
12595 enumeration. We must do this before the type of MINNODE and
12596 MAXNODE are transformed, since tree_int_cst_min_precision relies
12597 on the TREE_TYPE of the value it is passed. */
12598 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12599 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12600 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12601 int precision
= MAX (lowprec
, highprec
);
12603 bool use_short_enum
;
12605 /* Determine the underlying type of the enumeration.
12609 The underlying type of an enumeration is an integral type that
12610 can represent all the enumerator values defined in the
12611 enumeration. It is implementation-defined which integral type is
12612 used as the underlying type for an enumeration except that the
12613 underlying type shall not be larger than int unless the value of
12614 an enumerator cannot fit in an int or unsigned int.
12616 We use "int" or an "unsigned int" as the underlying type, even if
12617 a smaller integral type would work, unless the user has
12618 explicitly requested that we use the smallest possible type. The
12619 user can request that for all enumerations with a command line
12620 flag, or for just one enumeration with an attribute. */
12622 use_short_enum
= flag_short_enums
12623 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12625 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12629 underlying_type
= integer_types
[itk
];
12630 if (underlying_type
!= NULL_TREE
12631 && TYPE_PRECISION (underlying_type
) >= precision
12632 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12635 if (itk
== itk_none
)
12639 IF no integral type can represent all the enumerator values, the
12640 enumeration is ill-formed. */
12641 error ("no integral type can represent all of the enumerator values "
12642 "for %qT", enumtype
);
12643 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12644 underlying_type
= integer_types
[itk_unsigned_long_long
];
12649 The value of sizeof() applied to an enumeration type, an object
12650 of an enumeration type, or an enumerator, is the value of sizeof()
12651 applied to the underlying type. */
12652 copy_type_enum (enumtype
, underlying_type
);
12654 /* Compute the minimum and maximum values for the type.
12658 For an enumeration where emin is the smallest enumerator and emax
12659 is the largest, the values of the enumeration are the values of the
12660 underlying type in the range bmin to bmax, where bmin and bmax are,
12661 respectively, the smallest and largest values of the smallest bit-
12662 field that can store emin and emax. */
12664 /* The middle-end currently assumes that types with TYPE_PRECISION
12665 narrower than their underlying type are suitably zero or sign
12666 extended to fill their mode. Similarly, it assumes that the front
12667 end assures that a value of a particular type must be within
12668 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12670 We used to set these fields based on bmin and bmax, but that led
12671 to invalid assumptions like optimizing away bounds checking. So
12672 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12673 TYPE_MAX_VALUE to the values for the mode above and only restrict
12674 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12675 ENUM_UNDERLYING_TYPE (enumtype
)
12676 = build_distinct_type_copy (underlying_type
);
12677 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12678 set_min_and_max_values_for_integral_type
12679 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12681 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12682 if (flag_strict_enums
)
12683 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12687 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12689 /* Convert each of the enumerators to the type of the underlying
12690 type of the enumeration. */
12691 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12693 location_t saved_location
;
12695 decl
= TREE_VALUE (values
);
12696 saved_location
= input_location
;
12697 input_location
= DECL_SOURCE_LOCATION (decl
);
12698 if (fixed_underlying_type_p
)
12699 /* If the enumeration type has a fixed underlying type, we
12700 already checked all of the enumerator values. */
12701 value
= DECL_INITIAL (decl
);
12703 value
= perform_implicit_conversion (underlying_type
,
12704 DECL_INITIAL (decl
),
12705 tf_warning_or_error
);
12706 input_location
= saved_location
;
12708 /* Do not clobber shared ints. */
12709 value
= copy_node (value
);
12711 TREE_TYPE (value
) = enumtype
;
12712 DECL_INITIAL (decl
) = value
;
12715 /* Fix up all variant types of this enum type. */
12716 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12717 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12719 if (at_class_scope_p ()
12720 && COMPLETE_TYPE_P (current_class_type
)
12721 && UNSCOPED_ENUM_P (enumtype
))
12722 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12723 current_class_type
);
12725 /* Finish debugging output for this type. */
12726 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12729 /* Finishes the enum type. This is called only the first time an
12730 enumeration is seen, be it opaque or odinary.
12731 ENUMTYPE is the type object. */
12734 finish_enum (tree enumtype
)
12736 if (processing_template_decl
)
12738 if (at_function_scope_p ())
12739 add_stmt (build_min (TAG_DEFN
, enumtype
));
12743 /* If this is a forward declaration, there should not be any variants,
12744 though we can get a variant in the middle of an enum-specifier with
12745 wacky code like 'enum E { e = sizeof(const E*) };' */
12746 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12747 && (TYPE_VALUES (enumtype
)
12748 || !TYPE_NEXT_VARIANT (enumtype
)));
12751 /* Build and install a CONST_DECL for an enumeration constant of the
12752 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12753 LOC is the location of NAME.
12754 Assignment of sequential values by default is handled here. */
12757 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12763 /* If the VALUE was erroneous, pretend it wasn't there; that will
12764 result in the enum being assigned the next value in sequence. */
12765 if (value
== error_mark_node
)
12768 /* Remove no-op casts from the value. */
12770 STRIP_TYPE_NOPS (value
);
12772 if (! processing_template_decl
)
12774 /* Validate and default VALUE. */
12775 if (value
!= NULL_TREE
)
12777 value
= cxx_constant_value (value
);
12779 if (TREE_CODE (value
) != INTEGER_CST
12780 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12782 error ("enumerator value for %qD is not an integer constant",
12788 /* Default based on previous value. */
12789 if (value
== NULL_TREE
)
12791 if (TYPE_VALUES (enumtype
))
12796 /* C++03 7.2/4: If no initializer is specified for the first
12797 enumerator, the type is an unspecified integral
12798 type. Otherwise the type is the same as the type of the
12799 initializing value of the preceding enumerator unless the
12800 incremented value is not representable in that type, in
12801 which case the type is an unspecified integral type
12802 sufficient to contain the incremented value. */
12803 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12804 if (error_operand_p (prev_value
))
12805 value
= error_mark_node
;
12808 double_int di
= TREE_INT_CST (prev_value
)
12809 .add_with_sign (double_int_one
,
12810 false, &overflowed
);
12813 tree type
= TREE_TYPE (prev_value
);
12814 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12815 if (!double_int_fits_to_tree_p (type
, di
))
12818 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12820 type
= integer_types
[itk
];
12821 if (type
!= NULL_TREE
12822 && (pos
|| !TYPE_UNSIGNED (type
))
12823 && double_int_fits_to_tree_p (type
, di
))
12826 if (type
&& cxx_dialect
< cxx11
12827 && itk
> itk_unsigned_long
)
12828 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12829 incremented enumerator value is too large for %<unsigned long%>" : "\
12830 incremented enumerator value is too large for %<long%>");
12832 if (type
== NULL_TREE
)
12835 value
= double_int_to_tree (type
, di
);
12840 error ("overflow in enumeration values at %qD", name
);
12841 value
= error_mark_node
;
12846 value
= integer_zero_node
;
12849 /* Remove no-op casts from the value. */
12850 STRIP_TYPE_NOPS (value
);
12852 /* If the underlying type of the enum is fixed, check whether
12853 the enumerator values fits in the underlying type. If it
12854 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12855 if (ENUM_UNDERLYING_TYPE (enumtype
)
12857 && TREE_CODE (value
) == INTEGER_CST
)
12859 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12860 error ("enumerator value %E is outside the range of underlying "
12861 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12863 /* Convert the value to the appropriate type. */
12864 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12868 /* C++ associates enums with global, function, or class declarations. */
12869 context
= current_scope ();
12871 /* Build the actual enumeration constant. Note that the enumeration
12872 constants have the underlying type of the enum (if it is fixed)
12873 or the type of their initializer (if the underlying type of the
12874 enum is not fixed):
12878 If the underlying type is fixed, the type of each enumerator
12879 prior to the closing brace is the underlying type; if the
12880 initializing value of an enumerator cannot be represented by
12881 the underlying type, the program is ill-formed. If the
12882 underlying type is not fixed, the type of each enumerator is
12883 the type of its initializing value.
12885 If the underlying type is not fixed, it will be computed by
12886 finish_enum and we will reset the type of this enumerator. Of
12887 course, if we're processing a template, there may be no value. */
12888 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12890 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12892 DECL_CONTEXT (decl
) = enumtype
;
12893 TREE_CONSTANT (decl
) = 1;
12894 TREE_READONLY (decl
) = 1;
12895 DECL_INITIAL (decl
) = value
;
12897 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12898 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12899 on the TYPE_FIELDS list for `S'. (That's so that you can say
12900 things like `S::i' later.) */
12901 finish_member_declaration (decl
);
12905 /* Add this enumeration constant to the list for this type. */
12906 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12909 /* Look for an enumerator with the given NAME within the enumeration
12910 type ENUMTYPE. This routine is used primarily for qualified name
12911 lookup into an enumerator in C++0x, e.g.,
12913 enum class Color { Red, Green, Blue };
12915 Color color = Color::Red;
12917 Returns the value corresponding to the enumerator, or
12918 NULL_TREE if no such enumerator was found. */
12920 lookup_enumerator (tree enumtype
, tree name
)
12923 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12925 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12926 return e
? TREE_VALUE (e
) : NULL_TREE
;
12930 /* We're defining DECL. Make sure that its type is OK. */
12933 check_function_type (tree decl
, tree current_function_parms
)
12935 tree fntype
= TREE_TYPE (decl
);
12936 tree return_type
= complete_type (TREE_TYPE (fntype
));
12938 /* In a function definition, arg types must be complete. */
12939 require_complete_types_for_parms (current_function_parms
);
12941 if (dependent_type_p (return_type
)
12942 || type_uses_auto (return_type
))
12944 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12945 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12947 tree args
= TYPE_ARG_TYPES (fntype
);
12949 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12950 error ("return type %q#T is incomplete", return_type
);
12952 error ("return type has Java class type %q#T", return_type
);
12954 /* Make it return void instead. */
12955 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12956 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12958 TREE_CHAIN (args
));
12960 fntype
= build_function_type (void_type_node
, args
);
12962 = build_exception_variant (fntype
,
12963 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12964 fntype
= (cp_build_type_attribute_variant
12965 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12966 TREE_TYPE (decl
) = fntype
;
12969 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12972 /* Create the FUNCTION_DECL for a function definition.
12973 DECLSPECS and DECLARATOR are the parts of the declaration;
12974 they describe the function's name and the type it returns,
12975 but twisted together in a fashion that parallels the syntax of C.
12977 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12978 DECLARATOR is really the DECL for the function we are about to
12979 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12980 indicating that the function is an inline defined in-class.
12982 This function creates a binding context for the function body
12983 as well as setting up the FUNCTION_DECL in current_function_decl.
12985 For C++, we must first check whether that datum makes any sense.
12986 For example, "class A local_a(1,2);" means that variable local_a
12987 is an aggregate of type A, which should have a constructor
12988 applied to it with the argument list [1, 2].
12990 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12991 or may be a BLOCK if the function has been defined previously
12992 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12993 error_mark_node if the function has never been defined, or
12994 a BLOCK if the function has been defined somewhere. */
12997 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12999 tree ctype
= NULL_TREE
;
13002 int doing_friend
= 0;
13003 cp_binding_level
*bl
;
13004 tree current_function_parms
;
13005 struct c_fileinfo
*finfo
13006 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13007 bool honor_interface
;
13009 /* Sanity check. */
13010 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13011 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13013 fntype
= TREE_TYPE (decl1
);
13014 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13015 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13017 /* ISO C++ 11.4/5. A friend function defined in a class is in
13018 the (lexical) scope of the class in which it is defined. */
13019 if (!ctype
&& DECL_FRIEND_P (decl1
))
13021 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13023 /* CTYPE could be null here if we're dealing with a template;
13024 for example, `inline friend float foo()' inside a template
13025 will have no CTYPE set. */
13026 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13032 if (DECL_DECLARED_INLINE_P (decl1
)
13033 && lookup_attribute ("noinline", attrs
))
13034 warning (0, "inline function %q+D given attribute noinline", decl1
);
13036 /* Handle gnu_inline attribute. */
13037 if (GNU_INLINE_P (decl1
))
13039 DECL_EXTERNAL (decl1
) = 1;
13040 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13041 DECL_INTERFACE_KNOWN (decl1
) = 1;
13042 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13045 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13046 /* This is a constructor, we must ensure that any default args
13047 introduced by this definition are propagated to the clones
13048 now. The clones are used directly in overload resolution. */
13049 adjust_clone_args (decl1
);
13051 /* Sometimes we don't notice that a function is a static member, and
13052 build a METHOD_TYPE for it. Fix that up now. */
13053 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13054 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13056 /* Set up current_class_type, and enter the scope of the class, if
13059 push_nested_class (ctype
);
13060 else if (DECL_STATIC_FUNCTION_P (decl1
))
13061 push_nested_class (DECL_CONTEXT (decl1
));
13063 /* Now that we have entered the scope of the class, we must restore
13064 the bindings for any template parameters surrounding DECL1, if it
13065 is an inline member template. (Order is important; consider the
13066 case where a template parameter has the same name as a field of
13067 the class.) It is not until after this point that
13068 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13069 if (flags
& SF_INCLASS_INLINE
)
13070 maybe_begin_member_template_processing (decl1
);
13072 /* Effective C++ rule 15. */
13074 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13075 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13076 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13078 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13079 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13080 if (!DECL_INITIAL (decl1
))
13081 DECL_INITIAL (decl1
) = error_mark_node
;
13083 /* This function exists in static storage.
13084 (This does not mean `static' in the C sense!) */
13085 TREE_STATIC (decl1
) = 1;
13087 /* We must call push_template_decl after current_class_type is set
13088 up. (If we are processing inline definitions after exiting a
13089 class scope, current_class_type will be NULL_TREE until set above
13090 by push_nested_class.) */
13091 if (processing_template_decl
)
13093 tree newdecl1
= push_template_decl (decl1
);
13094 if (newdecl1
== error_mark_node
)
13096 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13097 pop_nested_class ();
13103 /* We are now in the scope of the function being defined. */
13104 current_function_decl
= decl1
;
13106 /* Save the parm names or decls from this function's declarator
13107 where store_parm_decls will find them. */
13108 current_function_parms
= DECL_ARGUMENTS (decl1
);
13110 /* Make sure the parameter and return types are reasonable. When
13111 you declare a function, these types can be incomplete, but they
13112 must be complete when you define the function. */
13113 check_function_type (decl1
, current_function_parms
);
13115 /* Build the return declaration for the function. */
13116 restype
= TREE_TYPE (fntype
);
13118 if (DECL_RESULT (decl1
) == NULL_TREE
)
13122 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13123 DECL_ARTIFICIAL (resdecl
) = 1;
13124 DECL_IGNORED_P (resdecl
) = 1;
13125 DECL_RESULT (decl1
) = resdecl
;
13127 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13130 /* Let the user know we're compiling this function. */
13131 announce_function (decl1
);
13133 /* Record the decl so that the function name is defined.
13134 If we already have a decl for this name, and it is a FUNCTION_DECL,
13135 use the old decl. */
13136 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13138 /* A specialization is not used to guide overload resolution. */
13139 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13140 && !(DECL_USE_TEMPLATE (decl1
) &&
13141 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13143 tree olddecl
= pushdecl (decl1
);
13145 if (olddecl
== error_mark_node
)
13146 /* If something went wrong when registering the declaration,
13147 use DECL1; we have to have a FUNCTION_DECL to use when
13148 parsing the body of the function. */
13152 /* Otherwise, OLDDECL is either a previous declaration
13153 of the same function or DECL1 itself. */
13155 if (warn_missing_declarations
13156 && olddecl
== decl1
13157 && !DECL_MAIN_P (decl1
)
13158 && TREE_PUBLIC (decl1
)
13159 && !DECL_DECLARED_INLINE_P (decl1
))
13163 /* Check whether DECL1 is in an anonymous
13165 for (context
= DECL_CONTEXT (decl1
);
13167 context
= DECL_CONTEXT (context
))
13169 if (TREE_CODE (context
) == NAMESPACE_DECL
13170 && DECL_NAME (context
) == NULL_TREE
)
13174 if (context
== NULL
)
13175 warning (OPT_Wmissing_declarations
,
13176 "no previous declaration for %q+D", decl1
);
13184 /* We need to set the DECL_CONTEXT. */
13185 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13186 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13188 fntype
= TREE_TYPE (decl1
);
13189 restype
= TREE_TYPE (fntype
);
13191 /* If #pragma weak applies, mark the decl appropriately now.
13192 The pragma only applies to global functions. Because
13193 determining whether or not the #pragma applies involves
13194 computing the mangled name for the declaration, we cannot
13195 apply the pragma until after we have merged this declaration
13196 with any previous declarations; if the original declaration
13197 has a linkage specification, that specification applies to
13198 the definition as well, and may affect the mangled name. */
13199 if (DECL_FILE_SCOPE_P (decl1
))
13200 maybe_apply_pragma_weak (decl1
);
13203 /* Reset this in case the call to pushdecl changed it. */
13204 current_function_decl
= decl1
;
13206 gcc_assert (DECL_INITIAL (decl1
));
13208 /* This function may already have been parsed, in which case just
13209 return; our caller will skip over the body without parsing. */
13210 if (DECL_INITIAL (decl1
) != error_mark_node
)
13213 /* Initialize RTL machinery. We cannot do this until
13214 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13215 even when processing a template; this is how we get
13216 CFUN set up, and our per-function variables initialized.
13217 FIXME factor out the non-RTL stuff. */
13218 bl
= current_binding_level
;
13219 allocate_struct_function (decl1
, processing_template_decl
);
13221 /* Initialize the language data structures. Whenever we start
13222 a new function, we destroy temporaries in the usual way. */
13223 cfun
->language
= ggc_alloc_cleared_language_function ();
13224 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13225 current_binding_level
= bl
;
13227 if (!processing_template_decl
&& type_uses_auto (restype
))
13229 FNDECL_USED_AUTO (decl1
) = true;
13230 current_function_auto_return_pattern
= restype
;
13233 /* Start the statement-tree, start the tree now. */
13234 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13236 /* If we are (erroneously) defining a function that we have already
13237 defined before, wipe out what we knew before. */
13238 if (!DECL_PENDING_INLINE_P (decl1
))
13239 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13241 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13243 /* We know that this was set up by `grokclassfn'. We do not
13244 wait until `store_parm_decls', since evil parse errors may
13245 never get us to that point. Here we keep the consistency
13246 between `current_class_type' and `current_class_ptr'. */
13247 tree t
= DECL_ARGUMENTS (decl1
);
13249 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13250 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13252 cp_function_chain
->x_current_class_ref
13253 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13254 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13255 cp_function_chain
->x_current_class_ptr
= t
;
13257 /* Constructors and destructors need to know whether they're "in
13258 charge" of initializing virtual base classes. */
13259 t
= DECL_CHAIN (t
);
13260 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13262 current_in_charge_parm
= t
;
13263 t
= DECL_CHAIN (t
);
13265 if (DECL_HAS_VTT_PARM_P (decl1
))
13267 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13268 current_vtt_parm
= t
;
13272 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13273 /* Implicitly-defined methods (like the
13274 destructor for a class in which no destructor
13275 is explicitly declared) must not be defined
13276 until their definition is needed. So, we
13277 ignore interface specifications for
13278 compiler-generated functions. */
13279 && !DECL_ARTIFICIAL (decl1
));
13281 if (processing_template_decl
)
13282 /* Don't mess with interface flags. */;
13283 else if (DECL_INTERFACE_KNOWN (decl1
))
13285 tree ctx
= decl_function_context (decl1
);
13287 if (DECL_NOT_REALLY_EXTERN (decl1
))
13288 DECL_EXTERNAL (decl1
) = 0;
13290 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13291 /* This is a function in a local class in an extern inline
13292 or template function. */
13293 comdat_linkage (decl1
);
13295 /* If this function belongs to an interface, it is public.
13296 If it belongs to someone else's interface, it is also external.
13297 This only affects inlines and template instantiations. */
13298 else if (!finfo
->interface_unknown
&& honor_interface
)
13300 if (DECL_DECLARED_INLINE_P (decl1
)
13301 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13303 DECL_EXTERNAL (decl1
)
13304 = (finfo
->interface_only
13305 || (DECL_DECLARED_INLINE_P (decl1
)
13306 && ! flag_implement_inlines
13307 && !DECL_VINDEX (decl1
)));
13309 /* For WIN32 we also want to put these in linkonce sections. */
13310 maybe_make_one_only (decl1
);
13313 DECL_EXTERNAL (decl1
) = 0;
13314 DECL_INTERFACE_KNOWN (decl1
) = 1;
13315 /* If this function is in an interface implemented in this file,
13316 make sure that the back end knows to emit this function
13318 if (!DECL_EXTERNAL (decl1
))
13319 mark_needed (decl1
);
13321 else if (finfo
->interface_unknown
&& finfo
->interface_only
13322 && honor_interface
)
13324 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13325 interface, we will have both finfo->interface_unknown and
13326 finfo->interface_only set. In that case, we don't want to
13327 use the normal heuristics because someone will supply a
13328 #pragma implementation elsewhere, and deducing it here would
13329 produce a conflict. */
13330 comdat_linkage (decl1
);
13331 DECL_EXTERNAL (decl1
) = 0;
13332 DECL_INTERFACE_KNOWN (decl1
) = 1;
13333 DECL_DEFER_OUTPUT (decl1
) = 1;
13337 /* This is a definition, not a reference.
13338 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13339 if (!GNU_INLINE_P (decl1
))
13340 DECL_EXTERNAL (decl1
) = 0;
13342 if ((DECL_DECLARED_INLINE_P (decl1
)
13343 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13344 && ! DECL_INTERFACE_KNOWN (decl1
))
13345 DECL_DEFER_OUTPUT (decl1
) = 1;
13347 DECL_INTERFACE_KNOWN (decl1
) = 1;
13350 /* Determine the ELF visibility attribute for the function. We must not
13351 do this before calling "pushdecl", as we must allow "duplicate_decls"
13352 to merge any attributes appropriately. We also need to wait until
13354 if (!DECL_CLONED_FUNCTION_P (decl1
))
13355 determine_visibility (decl1
);
13357 begin_scope (sk_function_parms
, decl1
);
13361 if (DECL_DESTRUCTOR_P (decl1
)
13362 || (DECL_CONSTRUCTOR_P (decl1
)
13363 && targetm
.cxx
.cdtor_returns_this ()))
13365 cdtor_label
= build_decl (input_location
,
13366 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13367 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13370 start_fname_decls ();
13372 store_parm_decls (current_function_parms
);
13378 /* Like start_preparsed_function, except that instead of a
13379 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13381 Returns true on success. If the DECLARATOR is not suitable
13382 for a function, we return false, which tells the parser to
13383 skip the entire function. */
13386 start_function (cp_decl_specifier_seq
*declspecs
,
13387 const cp_declarator
*declarator
,
13392 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13393 if (decl1
== error_mark_node
)
13395 /* If the declarator is not suitable for a function definition,
13396 cause a syntax error. */
13397 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13399 error ("invalid function declaration");
13403 if (DECL_MAIN_P (decl1
))
13404 /* main must return int. grokfndecl should have corrected it
13405 (and issued a diagnostic) if the user got it wrong. */
13406 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13407 integer_type_node
));
13409 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13412 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13416 use_eh_spec_block (tree fn
)
13418 return (flag_exceptions
&& flag_enforce_eh_specs
13419 && !processing_template_decl
13420 && !type_throw_all_p (TREE_TYPE (fn
))
13421 /* We insert the EH_SPEC_BLOCK only in the original
13422 function; then, it is copied automatically to the
13424 && !DECL_CLONED_FUNCTION_P (fn
)
13425 /* Implicitly-generated constructors and destructors have
13426 exception specifications. However, those specifications
13427 are the union of the possible exceptions specified by the
13428 constructors/destructors for bases and members, so no
13429 unallowed exception will ever reach this function. By
13430 not creating the EH_SPEC_BLOCK we save a little memory,
13431 and we avoid spurious warnings about unreachable
13433 && !DECL_DEFAULTED_FN (fn
));
13436 /* Store the parameter declarations into the current function declaration.
13437 This is called after parsing the parameter declarations, before
13438 digesting the body of the function.
13440 Also install to binding contour return value identifier, if any. */
13443 store_parm_decls (tree current_function_parms
)
13445 tree fndecl
= current_function_decl
;
13448 /* This is a chain of any other decls that came in among the parm
13449 declarations. If a parm is declared with enum {foo, bar} x;
13450 then CONST_DECLs for foo and bar are put here. */
13451 tree nonparms
= NULL_TREE
;
13453 if (current_function_parms
)
13455 /* This case is when the function was defined with an ANSI prototype.
13456 The parms already have decls, so we need not do anything here
13457 except record them as in effect
13458 and complain if any redundant old-style parm decls were written. */
13460 tree specparms
= current_function_parms
;
13463 /* Must clear this because it might contain TYPE_DECLs declared
13465 current_binding_level
->names
= NULL
;
13467 /* If we're doing semantic analysis, then we'll call pushdecl
13468 for each of these. We must do them in reverse order so that
13469 they end in the correct forward order. */
13470 specparms
= nreverse (specparms
);
13472 for (parm
= specparms
; parm
; parm
= next
)
13474 next
= DECL_CHAIN (parm
);
13475 if (TREE_CODE (parm
) == PARM_DECL
)
13477 if (DECL_NAME (parm
) == NULL_TREE
13478 || !VOID_TYPE_P (parm
))
13481 error ("parameter %qD declared void", parm
);
13485 /* If we find an enum constant or a type tag,
13486 put it aside for the moment. */
13487 TREE_CHAIN (parm
) = NULL_TREE
;
13488 nonparms
= chainon (nonparms
, parm
);
13492 /* Get the decls in their original chain order and record in the
13493 function. This is all and only the PARM_DECLs that were
13494 pushed into scope by the loop above. */
13495 DECL_ARGUMENTS (fndecl
) = getdecls ();
13498 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13500 /* Now store the final chain of decls for the arguments
13501 as the decl-chain of the current lexical scope.
13502 Put the enumerators in as well, at the front so that
13503 DECL_ARGUMENTS is not modified. */
13504 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13506 if (use_eh_spec_block (current_function_decl
))
13507 current_eh_spec_block
= begin_eh_spec_block ();
13511 /* We have finished doing semantic analysis on DECL, but have not yet
13512 generated RTL for its body. Save away our current state, so that
13513 when we want to generate RTL later we know what to do. */
13516 save_function_data (tree decl
)
13518 struct language_function
*f
;
13520 /* Save the language-specific per-function data so that we can
13521 get it back when we really expand this function. */
13522 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13525 f
= ggc_alloc_language_function ();
13526 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13527 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13529 /* Clear out the bits we don't need. */
13530 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13531 f
->bindings
= NULL
;
13532 f
->x_local_names
= NULL
;
13533 f
->base
.local_typedefs
= NULL
;
13537 /* Set the return value of the constructor (if present). */
13540 finish_constructor_body (void)
13545 if (targetm
.cxx
.cdtor_returns_this ()
13546 && (! TYPE_FOR_JAVA (current_class_type
)))
13548 /* Any return from a constructor will end up here. */
13549 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13551 val
= DECL_ARGUMENTS (current_function_decl
);
13552 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13553 DECL_RESULT (current_function_decl
), val
);
13554 /* Return the address of the object. */
13555 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13556 add_stmt (exprstmt
);
13560 /* Do all the processing for the beginning of a destructor; set up the
13561 vtable pointers and cleanups for bases and members. */
13564 begin_destructor_body (void)
13566 tree compound_stmt
;
13568 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13569 issued an error message. We still want to try to process the
13570 body of the function, but initialize_vtbl_ptrs will crash if
13571 TYPE_BINFO is NULL. */
13572 if (COMPLETE_TYPE_P (current_class_type
))
13574 compound_stmt
= begin_compound_stmt (0);
13575 /* Make all virtual function table pointers in non-virtual base
13576 classes point to CURRENT_CLASS_TYPE's virtual function
13578 initialize_vtbl_ptrs (current_class_ptr
);
13579 finish_compound_stmt (compound_stmt
);
13581 /* Insert a cleanup to let the back end know that the object is dead
13582 when we exit the destructor, either normally or via exception. */
13583 tree clobber
= build_constructor (current_class_type
, NULL
);
13584 TREE_THIS_VOLATILE (clobber
) = true;
13585 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13586 current_class_ref
, clobber
);
13587 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13589 /* And insert cleanups for our bases and members so that they
13590 will be properly destroyed if we throw. */
13591 push_base_cleanups ();
13595 /* At the end of every destructor we generate code to delete the object if
13596 necessary. Do that now. */
13599 finish_destructor_body (void)
13603 /* Any return from a destructor will end up here; that way all base
13604 and member cleanups will be run when the function returns. */
13605 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13607 /* In a virtual destructor, we must call delete. */
13608 if (DECL_VIRTUAL_P (current_function_decl
))
13611 tree virtual_size
= cxx_sizeof (current_class_type
);
13615 At the point of definition of a virtual destructor (including
13616 an implicit definition), non-placement operator delete shall
13617 be looked up in the scope of the destructor's class and if
13618 found shall be accessible and unambiguous. */
13619 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13621 /*global_p=*/false,
13622 /*placement=*/NULL_TREE
,
13623 /*alloc_fn=*/NULL_TREE
,
13624 tf_warning_or_error
);
13626 if_stmt
= begin_if_stmt ();
13627 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13628 current_in_charge_parm
,
13631 finish_expr_stmt (exprstmt
);
13632 finish_then_clause (if_stmt
);
13633 finish_if_stmt (if_stmt
);
13636 if (targetm
.cxx
.cdtor_returns_this ())
13640 val
= DECL_ARGUMENTS (current_function_decl
);
13641 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13642 DECL_RESULT (current_function_decl
), val
);
13643 /* Return the address of the object. */
13644 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13645 add_stmt (exprstmt
);
13649 /* Do the necessary processing for the beginning of a function body, which
13650 in this case includes member-initializers, but not the catch clauses of
13651 a function-try-block. Currently, this means opening a binding level
13652 for the member-initializers (in a ctor), member cleanups (in a dtor),
13653 and capture proxies (in a lambda operator()). */
13656 begin_function_body (void)
13660 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13663 if (processing_template_decl
)
13664 /* Do nothing now. */;
13666 /* Always keep the BLOCK node associated with the outermost pair of
13667 curly braces of a function. These are needed for correct
13668 operation of dwarfout.c. */
13669 keep_next_level (true);
13671 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13673 if (processing_template_decl
)
13674 /* Do nothing now. */;
13675 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13676 begin_destructor_body ();
13681 /* Do the processing for the end of a function body. Currently, this means
13682 closing out the cleanups for fully-constructed bases and members, and in
13683 the case of the destructor, deleting the object if desired. Again, this
13684 is only meaningful for [cd]tors, since they are the only functions where
13685 there is a significant distinction between the main body and any
13686 function catch clauses. Handling, say, main() return semantics here
13687 would be wrong, as flowing off the end of a function catch clause for
13688 main() would also need to return 0. */
13691 finish_function_body (tree compstmt
)
13693 if (compstmt
== NULL_TREE
)
13696 /* Close the block. */
13697 finish_compound_stmt (compstmt
);
13699 if (processing_template_decl
)
13700 /* Do nothing now. */;
13701 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13702 finish_constructor_body ();
13703 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13704 finish_destructor_body ();
13707 /* Given a function, returns the BLOCK corresponding to the outermost level
13708 of curly braces, skipping the artificial block created for constructor
13712 outer_curly_brace_block (tree fndecl
)
13714 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13715 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13716 /* Skip the artificial function body block. */
13717 block
= BLOCK_SUBBLOCKS (block
);
13721 /* If FNDECL is a class's key method, add the class to the list of
13722 keyed classes that should be emitted. */
13725 record_key_method_defined (tree fndecl
)
13727 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13728 && DECL_VIRTUAL_P (fndecl
)
13729 && !processing_template_decl
)
13731 tree fnclass
= DECL_CONTEXT (fndecl
);
13732 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13733 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13737 /* Subroutine of finish_function.
13738 Save the body of constexpr functions for possible
13739 future compile time evaluation. */
13742 maybe_save_function_definition (tree fun
)
13744 if (!processing_template_decl
13745 && DECL_DECLARED_CONSTEXPR_P (fun
)
13746 && !DECL_CLONED_FUNCTION_P (fun
))
13747 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13750 /* Finish up a function declaration and compile that function
13751 all the way to assembler language output. The free the storage
13752 for the function definition.
13754 FLAGS is a bitwise or of the following values:
13756 We just finished processing the body of an in-class inline
13757 function definition. (This processing will have taken place
13758 after the class definition is complete.) */
13761 finish_function (int flags
)
13763 tree fndecl
= current_function_decl
;
13764 tree fntype
, ctype
= NULL_TREE
;
13765 int inclass_inline
= (flags
& 2) != 0;
13767 /* When we get some parse errors, we can end up without a
13768 current_function_decl, so cope. */
13769 if (fndecl
== NULL_TREE
)
13770 return error_mark_node
;
13772 if (c_dialect_objc ())
13773 objc_finish_function ();
13775 gcc_assert (!defer_mark_used_calls
);
13776 defer_mark_used_calls
= true;
13778 record_key_method_defined (fndecl
);
13780 fntype
= TREE_TYPE (fndecl
);
13782 /* TREE_READONLY (fndecl) = 1;
13783 This caused &foo to be of type ptr-to-const-function
13784 which then got a warning when stored in a ptr-to-function variable. */
13786 gcc_assert (building_stmt_list_p ());
13787 /* The current function is being defined, so its DECL_INITIAL should
13788 be set, and unless there's a multiple definition, it should be
13789 error_mark_node. */
13790 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13792 /* For a cloned function, we've already got all the code we need;
13793 there's no need to add any extra bits. */
13794 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13796 /* Make it so that `main' always returns 0 by default. */
13797 if (DECL_MAIN_P (current_function_decl
))
13798 finish_return_stmt (integer_zero_node
);
13800 if (use_eh_spec_block (current_function_decl
))
13801 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13802 (TREE_TYPE (current_function_decl
)),
13803 current_eh_spec_block
);
13806 /* If we're saving up tree structure, tie off the function now. */
13807 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13809 finish_fname_decls ();
13811 /* If this function can't throw any exceptions, remember that. */
13812 if (!processing_template_decl
13813 && !cp_function_chain
->can_throw
13814 && !flag_non_call_exceptions
13815 && !decl_replaceable_p (fndecl
))
13816 TREE_NOTHROW (fndecl
) = 1;
13818 /* This must come after expand_function_end because cleanups might
13819 have declarations (from inline functions) that need to go into
13820 this function's blocks. */
13822 /* If the current binding level isn't the outermost binding level
13823 for this function, either there is a bug, or we have experienced
13824 syntax errors and the statement tree is malformed. */
13825 if (current_binding_level
->kind
!= sk_function_parms
)
13827 /* Make sure we have already experienced errors. */
13828 gcc_assert (errorcount
);
13830 /* Throw away the broken statement tree and extra binding
13832 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13834 while (current_binding_level
->kind
!= sk_function_parms
)
13836 if (current_binding_level
->kind
== sk_class
)
13837 pop_nested_class ();
13839 poplevel (0, 0, 0);
13842 poplevel (1, 0, 1);
13844 /* Statements should always be full-expressions at the outermost set
13845 of curly braces for a function. */
13846 gcc_assert (stmts_are_full_exprs_p ());
13848 /* If there are no return statements in a function with auto return type,
13849 the return type is void. But if the declared type is something like
13850 auto*, this is an error. */
13851 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13852 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13854 if (!is_auto (current_function_auto_return_pattern
)
13855 && !current_function_returns_value
&& !current_function_returns_null
)
13857 error ("no return statements in function returning %qT",
13858 current_function_auto_return_pattern
);
13859 inform (input_location
, "only plain %<auto%> return type can be "
13860 "deduced to %<void%>");
13862 apply_deduced_return_type (fndecl
, void_type_node
);
13863 fntype
= TREE_TYPE (fndecl
);
13866 /* Save constexpr function body before it gets munged by
13867 the NRV transformation. */
13868 maybe_save_function_definition (fndecl
);
13870 /* Set up the named return value optimization, if we can. Candidate
13871 variables are selected in check_return_expr. */
13872 if (current_function_return_value
)
13874 tree r
= current_function_return_value
;
13877 if (r
!= error_mark_node
13878 /* This is only worth doing for fns that return in memory--and
13879 simpler, since we don't have to worry about promoted modes. */
13880 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13881 /* Only allow this for variables declared in the outer scope of
13882 the function so we know that their lifetime always ends with a
13883 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13884 we were to do this optimization in tree-ssa. */
13885 && (outer
= outer_curly_brace_block (fndecl
))
13886 && chain_member (r
, BLOCK_VARS (outer
)))
13887 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13889 current_function_return_value
= NULL_TREE
;
13892 /* Remember that we were in class scope. */
13893 if (current_class_name
)
13894 ctype
= current_class_type
;
13896 /* Must mark the RESULT_DECL as being in this function. */
13897 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13899 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13900 to the FUNCTION_DECL node itself. */
13901 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13903 /* Save away current state, if appropriate. */
13904 if (!processing_template_decl
)
13905 save_function_data (fndecl
);
13907 /* Complain if there's just no return statement. */
13908 if (warn_return_type
13909 && !VOID_TYPE_P (TREE_TYPE (fntype
))
13910 && !dependent_type_p (TREE_TYPE (fntype
))
13911 && !current_function_returns_value
&& !current_function_returns_null
13912 /* Don't complain if we abort or throw. */
13913 && !current_function_returns_abnormally
13914 /* Don't complain if we are declared noreturn. */
13915 && !TREE_THIS_VOLATILE (fndecl
)
13916 && !DECL_NAME (DECL_RESULT (fndecl
))
13917 && !TREE_NO_WARNING (fndecl
)
13918 /* Structor return values (if any) are set by the compiler. */
13919 && !DECL_CONSTRUCTOR_P (fndecl
)
13920 && !DECL_DESTRUCTOR_P (fndecl
)
13921 && targetm
.warn_func_return (fndecl
))
13923 warning (OPT_Wreturn_type
,
13924 "no return statement in function returning non-void");
13925 TREE_NO_WARNING (fndecl
) = 1;
13928 /* Store the end of the function, so that we get good line number
13929 info for the epilogue. */
13930 cfun
->function_end_locus
= input_location
;
13932 /* Complain about parameters that are only set, but never otherwise used. */
13933 if (warn_unused_but_set_parameter
13934 && !processing_template_decl
13935 && errorcount
== unused_but_set_errorcount
13936 && !DECL_CLONED_FUNCTION_P (fndecl
))
13940 for (decl
= DECL_ARGUMENTS (fndecl
);
13942 decl
= DECL_CHAIN (decl
))
13943 if (TREE_USED (decl
)
13944 && TREE_CODE (decl
) == PARM_DECL
13945 && !DECL_READ_P (decl
)
13946 && DECL_NAME (decl
)
13947 && !DECL_ARTIFICIAL (decl
)
13948 && !TREE_NO_WARNING (decl
)
13949 && !DECL_IN_SYSTEM_HEADER (decl
)
13950 && TREE_TYPE (decl
) != error_mark_node
13951 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13952 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13953 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13954 warning (OPT_Wunused_but_set_parameter
,
13955 "parameter %q+D set but not used", decl
);
13956 unused_but_set_errorcount
= errorcount
;
13959 /* Complain about locally defined typedefs that are not used in this
13961 maybe_warn_unused_local_typedefs ();
13963 /* Genericize before inlining. */
13964 if (!processing_template_decl
)
13966 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13967 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13968 cp_genericize (fndecl
);
13969 /* Clear out the bits we don't need. */
13970 f
->x_current_class_ptr
= NULL
;
13971 f
->x_current_class_ref
= NULL
;
13972 f
->x_eh_spec_block
= NULL
;
13973 f
->x_in_charge_parm
= NULL
;
13974 f
->x_vtt_parm
= NULL
;
13975 f
->x_return_value
= NULL
;
13976 f
->bindings
= NULL
;
13977 f
->extern_decl_map
= NULL
;
13979 /* Clear out the bits we don't need. */
13980 local_names
= NULL
;
13982 /* We're leaving the context of this function, so zap cfun. It's still in
13983 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13985 current_function_decl
= NULL
;
13987 /* If this is an in-class inline definition, we may have to pop the
13988 bindings for the template parameters that we added in
13989 maybe_begin_member_template_processing when start_function was
13991 if (inclass_inline
)
13992 maybe_end_member_template_processing ();
13994 /* Leave the scope of the class. */
13996 pop_nested_class ();
14001 current_function_decl
= NULL_TREE
;
14003 defer_mark_used_calls
= false;
14004 if (deferred_mark_used_calls
)
14009 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14011 vec_free (deferred_mark_used_calls
);
14017 /* Create the FUNCTION_DECL for a function definition.
14018 DECLSPECS and DECLARATOR are the parts of the declaration;
14019 they describe the return type and the name of the function,
14020 but twisted together in a fashion that parallels the syntax of C.
14022 This function creates a binding context for the function body
14023 as well as setting up the FUNCTION_DECL in current_function_decl.
14025 Returns a FUNCTION_DECL on success.
14027 If the DECLARATOR is not suitable for a function (it defines a datum
14028 instead), we return 0, which tells yyparse to report a parse error.
14030 May return void_type_node indicating that this method is actually
14031 a friend. See grokfield for more details.
14033 Came here with a `.pushlevel' .
14035 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14036 CHANGES TO CODE IN `grokfield'. */
14039 grokmethod (cp_decl_specifier_seq
*declspecs
,
14040 const cp_declarator
*declarator
, tree attrlist
)
14042 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14045 if (fndecl
== error_mark_node
)
14046 return error_mark_node
;
14048 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14050 error ("invalid member function declaration");
14051 return error_mark_node
;
14055 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14057 /* Pass friends other than inline friend functions back. */
14058 if (fndecl
== void_type_node
)
14061 if (DECL_IN_AGGR_P (fndecl
))
14063 if (DECL_CLASS_SCOPE_P (fndecl
))
14064 error ("%qD is already defined in class %qT", fndecl
,
14065 DECL_CONTEXT (fndecl
));
14066 return error_mark_node
;
14069 check_template_shadow (fndecl
);
14071 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14072 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14074 /* We process method specializations in finish_struct_1. */
14075 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14077 fndecl
= push_template_decl (fndecl
);
14078 if (fndecl
== error_mark_node
)
14082 if (! DECL_FRIEND_P (fndecl
))
14084 if (DECL_CHAIN (fndecl
))
14086 fndecl
= copy_node (fndecl
);
14087 TREE_CHAIN (fndecl
) = NULL_TREE
;
14091 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14093 DECL_IN_AGGR_P (fndecl
) = 1;
14098 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14099 we can lay it out later, when and if its type becomes complete.
14101 Also handle constexpr pointer to member variables where the initializer
14102 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14105 maybe_register_incomplete_var (tree var
)
14107 gcc_assert (VAR_P (var
));
14109 /* Keep track of variables with incomplete types. */
14110 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14111 && DECL_EXTERNAL (var
))
14113 tree inner_type
= TREE_TYPE (var
);
14115 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14116 inner_type
= TREE_TYPE (inner_type
);
14117 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14119 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14120 /* RTTI TD entries are created while defining the type_info. */
14121 || (TYPE_LANG_SPECIFIC (inner_type
)
14122 && TYPE_BEING_DEFINED (inner_type
)))
14124 incomplete_var iv
= {var
, inner_type
};
14125 vec_safe_push (incomplete_vars
, iv
);
14127 else if (TYPE_PTRMEM_P (inner_type
)
14128 && DECL_INITIAL (var
)
14129 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14131 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14132 gcc_assert (TYPE_BEING_DEFINED (context
));
14133 incomplete_var iv
= {var
, context
};
14134 vec_safe_push (incomplete_vars
, iv
);
14139 /* Called when a class type (given by TYPE) is defined. If there are
14140 any existing VAR_DECLs whose type has been completed by this
14141 declaration, update them now. */
14144 complete_vars (tree type
)
14147 incomplete_var
*iv
;
14149 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14151 if (same_type_p (type
, iv
->incomplete_type
))
14153 tree var
= iv
->decl
;
14154 tree type
= TREE_TYPE (var
);
14156 if (TYPE_PTRMEM_P (type
))
14157 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14160 /* Complete the type of the variable. The VAR_DECL itself
14161 will be laid out in expand_expr. */
14162 complete_type (type
);
14163 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14166 /* Remove this entry from the list. */
14167 incomplete_vars
->unordered_remove (ix
);
14173 /* Check for pending declarations which may have abstract type. */
14174 complete_type_check_abstract (type
);
14177 /* If DECL is of a type which needs a cleanup, build and return an
14178 expression to perform that cleanup here. Return NULL_TREE if no
14179 cleanup need be done. */
14182 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14188 /* Assume no cleanup is required. */
14189 cleanup
= NULL_TREE
;
14191 if (error_operand_p (decl
))
14194 /* Handle "__attribute__((cleanup))". We run the cleanup function
14195 before the destructor since the destructor is what actually
14196 terminates the lifetime of the object. */
14197 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14204 /* Get the name specified by the user for the cleanup function. */
14205 id
= TREE_VALUE (TREE_VALUE (attr
));
14206 /* Look up the name to find the cleanup function to call. It is
14207 important to use lookup_name here because that is what is
14208 used in c-common.c:handle_cleanup_attribute when performing
14209 initial checks on the attribute. Note that those checks
14210 include ensuring that the function found is not an overloaded
14211 function, or an object with an overloaded call operator,
14212 etc.; we can rely on the fact that the function found is an
14213 ordinary FUNCTION_DECL. */
14214 fn
= lookup_name (id
);
14215 arg
= build_address (decl
);
14217 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14218 if (cleanup
== error_mark_node
)
14219 return error_mark_node
;
14221 /* Handle ordinary C++ destructors. */
14222 type
= TREE_TYPE (decl
);
14223 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
14225 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14226 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
14227 && CLASSTYPE_VBASECLASSES (type
));
14231 if (TREE_CODE (type
) == ARRAY_TYPE
)
14234 addr
= build_address (decl
);
14236 /* Optimize for space over speed here. */
14237 if (!has_vbases
|| flag_expensive_optimizations
)
14238 flags
|= LOOKUP_NONVIRTUAL
;
14240 call
= build_delete (TREE_TYPE (addr
), addr
,
14241 sfk_complete_destructor
, flags
, 0, complain
);
14242 if (call
== error_mark_node
)
14243 cleanup
= error_mark_node
;
14245 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14250 /* build_delete sets the location of the destructor call to the
14251 current location, even though the destructor is going to be
14252 called later, at the end of the current scope. This can lead to
14253 a "jumpy" behaviour for users of debuggers when they step around
14254 the end of the block. So let's unset the location of the
14255 destructor call instead. */
14256 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14257 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14262 /* When a stmt has been parsed, this function is called. */
14269 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14270 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14271 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14274 static_fn_type (tree memfntype
)
14279 if (TYPE_PTRMEMFUNC_P (memfntype
))
14280 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14281 if (POINTER_TYPE_P (memfntype
)
14282 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14283 memfntype
= TREE_TYPE (memfntype
);
14284 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14286 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14287 args
= TYPE_ARG_TYPES (memfntype
);
14288 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14289 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14290 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14291 fntype
= (cp_build_type_attribute_variant
14292 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14293 fntype
= (build_exception_variant
14294 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14298 /* DECL was originally constructed as a non-static member function,
14299 but turned out to be static. Update it accordingly. */
14302 revert_static_member_fn (tree decl
)
14304 tree stype
= static_fn_type (decl
);
14305 cp_cv_quals quals
= type_memfn_quals (stype
);
14306 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14308 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14309 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14311 TREE_TYPE (decl
) = stype
;
14313 if (DECL_ARGUMENTS (decl
))
14314 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14315 DECL_STATIC_FUNCTION_P (decl
) = 1;
14318 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14319 one of the language-independent trees. */
14321 enum cp_tree_node_structure_enum
14322 cp_tree_node_structure (union lang_tree_node
* t
)
14324 switch (TREE_CODE (&t
->generic
))
14326 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14327 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14328 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14329 case OVERLOAD
: return TS_CP_OVERLOAD
;
14330 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14331 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14332 case BASELINK
: return TS_CP_BASELINK
;
14333 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14334 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14335 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14336 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14337 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14338 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14339 default: return TS_CP_GENERIC
;
14343 /* Build the void_list_node (void_type_node having been created). */
14345 build_void_list_node (void)
14347 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14352 cp_missing_noreturn_ok_p (tree decl
)
14354 /* A missing noreturn is ok for the `main' function. */
14355 return DECL_MAIN_P (decl
);
14358 /* Return the COMDAT group into which DECL should be placed. */
14361 cxx_comdat_group (tree decl
)
14365 /* Virtual tables, construction virtual tables, and virtual table
14366 tables all go in a single COMDAT group, named after the primary
14368 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14369 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14370 /* For all other DECLs, the COMDAT group is the mangled name of the
14371 declaration itself. */
14374 while (DECL_THUNK_P (decl
))
14376 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14377 into the same section as the target function. In that case
14378 we must return target's name. */
14379 tree target
= THUNK_TARGET (decl
);
14380 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14381 && DECL_SECTION_NAME (target
) != NULL
14382 && DECL_ONE_ONLY (target
))
14387 name
= DECL_ASSEMBLER_NAME (decl
);
14393 /* Returns the return type for FN as written by the user, which may include
14394 a placeholder for a deduced return type. */
14397 fndecl_declared_return_type (tree fn
)
14399 fn
= STRIP_TEMPLATE (fn
);
14400 if (FNDECL_USED_AUTO (fn
))
14402 struct language_function
*f
= NULL
;
14403 if (DECL_STRUCT_FUNCTION (fn
))
14404 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14406 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14407 return f
->x_auto_return_pattern
;
14409 return TREE_TYPE (TREE_TYPE (fn
));
14412 /* Returns true iff DECL was declared with an auto return type and it has
14413 not yet been deduced to a real type. */
14416 undeduced_auto_decl (tree decl
)
14418 if (cxx_dialect
< cxx1y
)
14420 return type_uses_auto (TREE_TYPE (decl
));
14423 /* Complain if DECL has an undeduced return type. */
14426 require_deduced_type (tree decl
)
14428 if (undeduced_auto_decl (decl
))
14429 error ("use of %qD before deduction of %<auto%>", decl
);
14432 #include "gt-cp-decl.h"