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
< cxx0x
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 tree oldres
= DECL_TEMPLATE_RESULT (olddecl
);
1070 tree newres
= DECL_TEMPLATE_RESULT (newdecl
);
1072 if (TREE_CODE (newres
) != TREE_CODE (oldres
))
1075 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1076 DECL_TEMPLATE_PARMS (olddecl
)))
1079 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1080 types_match
= same_type_p (TREE_TYPE (oldres
), TREE_TYPE (newres
));
1082 types_match
= decls_match (oldres
, newres
);
1084 // If the types of the underlying templates match, compare
1085 // their constraints. The declarations could differ there.
1087 // Note that NEWDECL may not have been fully configured (no template
1088 // info). If not, use the current temnplate requirements as those
1089 // that would be associated with decl.
1090 tree oldreqs
= DECL_TEMPLATE_CONSTRAINT (oldres
);
1091 tree newreqs
= DECL_TEMPLATE_INFO (newres
)
1092 ? DECL_TEMPLATE_CONSTRAINT (newres
) : current_template_reqs
;
1094 types_match
= equivalent_constraints (oldreqs
, newreqs
);
1098 /* Need to check scope for variable declaration (VAR_DECL).
1099 For typedef (TYPE_DECL), scope is ignored. */
1101 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1103 Two declarations for an object with C language linkage
1104 with the same name (ignoring the namespace that qualify
1105 it) that appear in different namespace scopes refer to
1107 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1110 if (TREE_TYPE (newdecl
) == error_mark_node
)
1111 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1112 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1113 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1114 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1117 types_match
= comptypes (TREE_TYPE (newdecl
),
1118 TREE_TYPE (olddecl
),
1119 COMPARE_REDECLARATION
);
1126 /* If NEWDECL is `static' and an `extern' was seen previously,
1127 warn about it. OLDDECL is the previous declaration.
1129 Note that this does not apply to the C++ case of declaring
1130 a variable `extern const' and then later `const'.
1132 Don't complain about built-in functions, since they are beyond
1133 the user's control. */
1136 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1138 if (TREE_CODE (newdecl
) == TYPE_DECL
1139 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1140 || TREE_CODE (newdecl
) == CONST_DECL
1141 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1144 /* Don't get confused by static member functions; that's a different
1146 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1147 && DECL_STATIC_FUNCTION_P (newdecl
))
1150 /* If the old declaration was `static', or the new one isn't, then
1151 everything is OK. */
1152 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1155 /* It's OK to declare a builtin function as `static'. */
1156 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1157 && DECL_ARTIFICIAL (olddecl
))
1160 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1161 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1164 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1165 function templates. If their exception specifications do not
1166 match, issue a diagnostic. */
1169 check_redeclaration_exception_specification (tree new_decl
,
1174 tree new_exceptions
;
1175 tree old_exceptions
;
1177 new_type
= TREE_TYPE (new_decl
);
1178 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1179 old_type
= TREE_TYPE (old_decl
);
1180 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1184 If any declaration of a function has an exception-specification,
1185 all declarations, including the definition and an explicit
1186 specialization, of that function shall have an
1187 exception-specification with the same set of type-ids. */
1188 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1189 && ! DECL_IS_BUILTIN (old_decl
)
1191 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1193 error ("declaration of %qF has a different exception specifier",
1195 error ("from previous declaration %q+F", old_decl
);
1199 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1200 Otherwise issue diagnostics. */
1203 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1205 old_decl
= STRIP_TEMPLATE (old_decl
);
1206 new_decl
= STRIP_TEMPLATE (new_decl
);
1207 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1208 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1210 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1211 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1213 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1215 if (DECL_BUILT_IN (old_decl
))
1217 /* Hide a built-in declaration. */
1218 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1219 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1222 /* 7.1.5 [dcl.constexpr]
1223 Note: An explicit specialization can differ from the template
1224 declaration with respect to the constexpr specifier. */
1225 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1226 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1229 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1230 error ("from previous declaration %q+D", old_decl
);
1234 // If OLDDECL and NEWDECL are concept declarations with the same type
1235 // (i.e., and template parameters), but different requirements,
1236 // emit diagnostics and return true. Otherwise, return false.
1238 check_concept_refinement (tree olddecl
, tree newdecl
)
1240 if (!DECL_DECLARED_CONCEPT_P (olddecl
) || !DECL_DECLARED_CONCEPT_P (newdecl
))
1243 // TODO: This isn't currently possible, but it will almost certainly
1244 // change with variable templates.
1245 tree d1
= DECL_TEMPLATE_RESULT (olddecl
);
1246 tree d2
= DECL_TEMPLATE_RESULT (newdecl
);
1247 if (TREE_CODE (d1
) != TREE_CODE (d2
))
1250 tree t1
= TREE_TYPE (d1
);
1251 tree t2
= TREE_TYPE (d2
);
1252 if (TREE_CODE (d1
) == FUNCTION_DECL
)
1254 if (compparms (TYPE_ARG_TYPES (t1
), TYPE_ARG_TYPES (t2
))
1255 && comp_template_parms (DECL_TEMPLATE_PARMS (olddecl
),
1256 DECL_TEMPLATE_PARMS (newdecl
))
1257 && !equivalently_constrained (olddecl
, newdecl
))
1259 error ("cannot specialize concept %q#D", olddecl
);
1267 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1268 && lookup_attribute ("gnu_inline", \
1269 DECL_ATTRIBUTES (fn)))
1271 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1272 If the redeclaration is invalid, a diagnostic is issued, and the
1273 error_mark_node is returned. Otherwise, OLDDECL is returned.
1275 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1278 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1281 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1283 unsigned olddecl_uid
= DECL_UID (olddecl
);
1284 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1285 int new_defines_function
= 0;
1286 tree new_template_info
;
1288 if (newdecl
== olddecl
)
1291 types_match
= decls_match (newdecl
, olddecl
);
1293 /* If either the type of the new decl or the type of the old decl is an
1294 error_mark_node, then that implies that we have already issued an
1295 error (earlier) for some bogus type specification, and in that case,
1296 it is rather pointless to harass the user with yet more error message
1297 about the same declaration, so just pretend the types match here. */
1298 if (TREE_TYPE (newdecl
) == error_mark_node
1299 || TREE_TYPE (olddecl
) == error_mark_node
)
1300 return error_mark_node
;
1302 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1303 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1305 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1306 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1307 && check_raw_literal_operator (olddecl
))
1308 error ("literal operator template %q+D conflicts with"
1309 " raw literal operator %qD", newdecl
, olddecl
);
1310 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1311 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1312 && check_raw_literal_operator (newdecl
))
1313 error ("raw literal operator %q+D conflicts with"
1314 " literal operator template %qD", newdecl
, olddecl
);
1317 if (DECL_P (olddecl
)
1318 && TREE_CODE (newdecl
) == FUNCTION_DECL
1319 && TREE_CODE (olddecl
) == FUNCTION_DECL
1320 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1322 if (DECL_DECLARED_INLINE_P (newdecl
)
1323 && DECL_UNINLINABLE (newdecl
)
1324 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1325 /* Already warned elsewhere. */;
1326 else if (DECL_DECLARED_INLINE_P (olddecl
)
1327 && DECL_UNINLINABLE (olddecl
)
1328 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1329 /* Already warned. */;
1330 else if (DECL_DECLARED_INLINE_P (newdecl
)
1331 && DECL_UNINLINABLE (olddecl
)
1332 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1334 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1336 warning (OPT_Wattributes
, "previous declaration of %q+D "
1337 "with attribute noinline", olddecl
);
1339 else if (DECL_DECLARED_INLINE_P (olddecl
)
1340 && DECL_UNINLINABLE (newdecl
)
1341 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1343 warning (OPT_Wattributes
, "function %q+D redeclared with "
1344 "attribute noinline", newdecl
);
1345 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1350 /* Check for redeclaration and other discrepancies. */
1351 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1352 && DECL_ARTIFICIAL (olddecl
))
1354 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1355 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1357 /* Avoid warnings redeclaring built-ins which have not been
1358 explicitly declared. */
1359 if (DECL_ANTICIPATED (olddecl
))
1362 /* If you declare a built-in or predefined function name as static,
1363 the old definition is overridden, but optionally warn this was a
1364 bad choice of name. */
1365 if (! TREE_PUBLIC (newdecl
))
1367 warning (OPT_Wshadow
,
1368 DECL_BUILT_IN (olddecl
)
1369 ? G_("shadowing built-in function %q#D")
1370 : G_("shadowing library function %q#D"), olddecl
);
1371 /* Discard the old built-in function. */
1374 /* If the built-in is not ansi, then programs can override
1375 it even globally without an error. */
1376 else if (! DECL_BUILT_IN (olddecl
))
1377 warning (0, "library function %q#D redeclared as non-function %q#D",
1381 error ("declaration of %q#D", newdecl
);
1382 error ("conflicts with built-in declaration %q#D",
1387 else if (!types_match
)
1389 /* Avoid warnings redeclaring built-ins which have not been
1390 explicitly declared. */
1391 if (DECL_ANTICIPATED (olddecl
))
1393 /* Deal with fileptr_type_node. FILE type is not known
1394 at the time we create the builtins. */
1397 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1398 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1400 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1403 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1405 tree t
= TREE_VALUE (t1
);
1408 && TYPE_NAME (TREE_TYPE (t
))
1409 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1410 == get_identifier ("FILE")
1411 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1413 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1415 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1416 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1417 types_match
= decls_match (newdecl
, olddecl
);
1419 return duplicate_decls (newdecl
, olddecl
,
1421 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1424 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1427 else if ((DECL_EXTERN_C_P (newdecl
)
1428 && DECL_EXTERN_C_P (olddecl
))
1429 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1430 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1432 /* A near match; override the builtin. */
1434 if (TREE_PUBLIC (newdecl
))
1436 warning (0, "new declaration %q#D", newdecl
);
1437 warning (0, "ambiguates built-in declaration %q#D",
1441 warning (OPT_Wshadow
,
1442 DECL_BUILT_IN (olddecl
)
1443 ? G_("shadowing built-in function %q#D")
1444 : G_("shadowing library function %q#D"), olddecl
);
1447 /* Discard the old built-in function. */
1450 /* Replace the old RTL to avoid problems with inlining. */
1451 COPY_DECL_RTL (newdecl
, olddecl
);
1453 /* Even if the types match, prefer the new declarations type for
1454 built-ins which have not been explicitly declared, for
1455 exception lists, etc... */
1456 else if (DECL_IS_BUILTIN (olddecl
))
1458 tree type
= TREE_TYPE (newdecl
);
1459 tree attribs
= (*targetm
.merge_type_attributes
)
1460 (TREE_TYPE (olddecl
), type
);
1462 type
= cp_build_type_attribute_variant (type
, attribs
);
1463 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1466 /* If a function is explicitly declared "throw ()", propagate that to
1467 the corresponding builtin. */
1468 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1469 && DECL_ANTICIPATED (olddecl
)
1470 && TREE_NOTHROW (newdecl
)
1471 && !TREE_NOTHROW (olddecl
))
1473 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1474 tree tmpdecl
= builtin_decl_explicit (fncode
);
1475 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1476 TREE_NOTHROW (tmpdecl
) = 1;
1479 /* Whether or not the builtin can throw exceptions has no
1480 bearing on this declarator. */
1481 TREE_NOTHROW (olddecl
) = 0;
1483 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1485 /* If a builtin function is redeclared as `static', merge
1486 the declarations, but make the original one static. */
1487 DECL_THIS_STATIC (olddecl
) = 1;
1488 TREE_PUBLIC (olddecl
) = 0;
1490 /* Make the old declaration consistent with the new one so
1491 that all remnants of the builtin-ness of this function
1492 will be banished. */
1493 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1494 COPY_DECL_RTL (newdecl
, olddecl
);
1497 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1499 /* C++ Standard, 3.3, clause 4:
1500 "[Note: a namespace name or a class template name must be unique
1501 in its declarative region (7.3.2, clause 14). ]" */
1502 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1503 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1504 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1505 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1506 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1507 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1509 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1510 && TREE_CODE (newdecl
) != TYPE_DECL
)
1511 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1512 && TREE_CODE (olddecl
) != TYPE_DECL
))
1514 /* We do nothing special here, because C++ does such nasty
1515 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1516 get shadowed, and know that if we need to find a TYPE_DECL
1517 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1518 slot of the identifier. */
1522 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1523 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1524 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1525 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1529 error ("%q#D redeclared as different kind of symbol", newdecl
);
1530 if (TREE_CODE (olddecl
) == TREE_LIST
)
1531 olddecl
= TREE_VALUE (olddecl
);
1532 error ("previous declaration of %q+#D", olddecl
);
1534 return error_mark_node
;
1536 else if (!types_match
)
1538 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1539 /* These are certainly not duplicate declarations; they're
1540 from different scopes. */
1543 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1545 /* The name of a class template may not be declared to refer to
1546 any other template, class, function, object, namespace, value,
1547 or type in the same scope. */
1548 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1549 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1551 error ("declaration of template %q#D", newdecl
);
1552 error ("conflicts with previous declaration %q+#D", olddecl
);
1553 return error_mark_node
;
1555 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1556 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1557 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1558 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1559 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1560 DECL_TEMPLATE_PARMS (olddecl
))
1561 /* Template functions can be disambiguated by
1563 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1564 TREE_TYPE (TREE_TYPE (olddecl
)))
1565 // Template functions can also be disambiguated by
1567 && equivalent_constraints (get_constraints (olddecl
),
1568 current_template_reqs
))
1570 error ("new declaration %q#D", newdecl
);
1571 error ("ambiguates old declaration %q+#D", olddecl
);
1573 else if (check_concept_refinement (olddecl
, newdecl
))
1575 return error_mark_node
;
1579 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1581 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1583 error ("declaration of C function %q#D conflicts with",
1585 error ("previous declaration %q+#D here", olddecl
);
1588 /* For function versions, params and types match, but they
1589 are not ambiguous. */
1590 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1591 && !DECL_FUNCTION_VERSIONED (olddecl
))
1592 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1593 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1595 error ("new declaration %q#D", newdecl
);
1596 error ("ambiguates old declaration %q+#D", olddecl
);
1597 return error_mark_node
;
1604 error ("conflicting declaration %q#D", newdecl
);
1605 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1606 return error_mark_node
;
1609 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1610 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1611 && (!DECL_TEMPLATE_INFO (newdecl
)
1612 || (DECL_TI_TEMPLATE (newdecl
)
1613 != DECL_TI_TEMPLATE (olddecl
))))
1614 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1615 && (!DECL_TEMPLATE_INFO (olddecl
)
1616 || (DECL_TI_TEMPLATE (olddecl
)
1617 != DECL_TI_TEMPLATE (newdecl
))))))
1618 /* It's OK to have a template specialization and a non-template
1619 with the same type, or to have specializations of two
1620 different templates with the same type. Note that if one is a
1621 specialization, and the other is an instantiation of the same
1622 template, that we do not exit at this point. That situation
1623 can occur if we instantiate a template class, and then
1624 specialize one of its methods. This situation is valid, but
1625 the declarations must be merged in the usual way. */
1627 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1628 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1629 && !DECL_USE_TEMPLATE (newdecl
))
1630 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1631 && !DECL_USE_TEMPLATE (olddecl
))))
1632 /* One of the declarations is a template instantiation, and the
1633 other is not a template at all. That's OK. */
1635 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1637 /* In [namespace.alias] we have:
1639 In a declarative region, a namespace-alias-definition can be
1640 used to redefine a namespace-alias declared in that declarative
1641 region to refer only to the namespace to which it already
1644 Therefore, if we encounter a second alias directive for the same
1645 alias, we can just ignore the second directive. */
1646 if (DECL_NAMESPACE_ALIAS (newdecl
)
1647 && (DECL_NAMESPACE_ALIAS (newdecl
)
1648 == DECL_NAMESPACE_ALIAS (olddecl
)))
1650 /* [namespace.alias]
1652 A namespace-name or namespace-alias shall not be declared as
1653 the name of any other entity in the same declarative region.
1654 A namespace-name defined at global scope shall not be
1655 declared as the name of any other entity in any global scope
1657 error ("declaration of namespace %qD conflicts with", newdecl
);
1658 error ("previous declaration of namespace %q+D here", olddecl
);
1659 return error_mark_node
;
1663 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1666 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1667 if (DECL_NAME (olddecl
) != NULL_TREE
)
1668 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1669 ? G_("%q+#D previously defined here")
1670 : G_("%q+#D previously declared here"), olddecl
);
1671 return error_mark_node
;
1673 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1674 && DECL_INITIAL (olddecl
) != NULL_TREE
1675 && !prototype_p (TREE_TYPE (olddecl
))
1676 && prototype_p (TREE_TYPE (newdecl
)))
1678 /* Prototype decl follows defn w/o prototype. */
1679 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1680 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1681 "follows non-prototype definition here");
1683 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1684 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1687 If two declarations of the same function or object
1688 specify different linkage-specifications ..., the program
1689 is ill-formed.... Except for functions with C++ linkage,
1690 a function declaration without a linkage specification
1691 shall not precede the first linkage specification for
1692 that function. A function can be declared without a
1693 linkage specification after an explicit linkage
1694 specification has been seen; the linkage explicitly
1695 specified in the earlier declaration is not affected by
1696 such a function declaration.
1698 DR 563 raises the question why the restrictions on
1699 functions should not also apply to objects. Older
1700 versions of G++ silently ignore the linkage-specification
1708 which is clearly wrong. Therefore, we now treat objects
1710 if (current_lang_depth () == 0)
1712 /* There is no explicit linkage-specification, so we use
1713 the linkage from the previous declaration. */
1714 if (!DECL_LANG_SPECIFIC (newdecl
))
1715 retrofit_lang_decl (newdecl
);
1716 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1720 error ("previous declaration of %q+#D with %qL linkage",
1721 olddecl
, DECL_LANGUAGE (olddecl
));
1722 error ("conflicts with new declaration with %qL linkage",
1723 DECL_LANGUAGE (newdecl
));
1727 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1729 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1731 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1732 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1735 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1736 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1738 for (; t1
&& t1
!= void_list_node
;
1739 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1740 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1742 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1745 permerror (input_location
, "default argument given for parameter %d of %q#D",
1747 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1751 error ("default argument given for parameter %d of %q#D",
1753 error ("after previous specification in %q+#D",
1760 /* Do not merge an implicit typedef with an explicit one. In:
1764 typedef class A A __attribute__ ((foo));
1766 the attribute should apply only to the typedef. */
1767 if (TREE_CODE (olddecl
) == TYPE_DECL
1768 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1769 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1772 /* If new decl is `static' and an `extern' was seen previously,
1774 warn_extern_redeclared_static (newdecl
, olddecl
);
1776 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1777 return error_mark_node
;
1779 /* We have committed to returning 1 at this point. */
1780 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1782 /* Now that functions must hold information normally held
1783 by field decls, there is extra work to do so that
1784 declaration information does not get destroyed during
1786 if (DECL_VINDEX (olddecl
))
1787 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1788 if (DECL_CONTEXT (olddecl
))
1789 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1790 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1791 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1792 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1793 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1794 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1795 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1796 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1797 SET_OVERLOADED_OPERATOR_CODE
1798 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1799 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1801 /* Optionally warn about more than one declaration for the same
1802 name, but don't warn about a function declaration followed by a
1804 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1805 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1806 /* Don't warn about extern decl followed by definition. */
1807 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1808 /* Don't warn about friends, let add_friend take care of it. */
1809 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1810 /* Don't warn about declaration followed by specialization. */
1811 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1812 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1814 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1815 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1818 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1819 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1821 if (DECL_DELETED_FN (newdecl
))
1823 error ("deleted definition of %qD", newdecl
);
1824 error ("after previous declaration %q+D", olddecl
);
1826 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1830 /* Deal with C++: must preserve virtual function table size. */
1831 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1833 tree newtype
= TREE_TYPE (newdecl
);
1834 tree oldtype
= TREE_TYPE (olddecl
);
1836 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1837 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1838 CLASSTYPE_FRIEND_CLASSES (newtype
)
1839 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1841 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1844 /* Copy all the DECL_... slots specified in the new decl
1845 except for any that we copy here from the old type. */
1846 DECL_ATTRIBUTES (newdecl
)
1847 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1849 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1853 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1854 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1855 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1856 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1857 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1858 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1860 DECL_ATTRIBUTES (old_result
)
1861 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1863 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1865 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1866 && DECL_INITIAL (new_result
))
1868 if (DECL_INITIAL (old_result
))
1869 DECL_UNINLINABLE (old_result
) = 1;
1871 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1872 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1873 DECL_NOT_REALLY_EXTERN (old_result
)
1874 = DECL_NOT_REALLY_EXTERN (new_result
);
1875 DECL_INTERFACE_KNOWN (old_result
)
1876 = DECL_INTERFACE_KNOWN (new_result
);
1877 DECL_DECLARED_INLINE_P (old_result
)
1878 = DECL_DECLARED_INLINE_P (new_result
);
1879 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1880 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1885 DECL_DECLARED_INLINE_P (old_result
)
1886 |= DECL_DECLARED_INLINE_P (new_result
);
1887 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1888 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1889 check_redeclaration_exception_specification (newdecl
, olddecl
);
1893 /* If the new declaration is a definition, update the file and
1894 line information on the declaration, and also make
1895 the old declaration the same definition. */
1896 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1898 DECL_SOURCE_LOCATION (olddecl
)
1899 = DECL_SOURCE_LOCATION (old_result
)
1900 = DECL_SOURCE_LOCATION (newdecl
);
1901 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1902 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1905 DECL_ARGUMENTS (old_result
)
1906 = DECL_ARGUMENTS (new_result
);
1907 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1908 parm
= DECL_CHAIN (parm
))
1909 DECL_CONTEXT (parm
) = old_result
;
1918 /* Automatically handles default parameters. */
1919 tree oldtype
= TREE_TYPE (olddecl
);
1922 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1923 maybe_instantiate_noexcept (olddecl
);
1925 /* Merge the data types specified in the two decls. */
1926 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1928 /* If merge_types produces a non-typedef type, just use the old type. */
1929 if (TREE_CODE (newdecl
) == TYPE_DECL
1930 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1933 if (VAR_P (newdecl
))
1935 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1936 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1937 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1938 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1939 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1940 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1942 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1943 if (DECL_LANG_SPECIFIC (olddecl
)
1944 && CP_DECL_THREADPRIVATE_P (olddecl
))
1946 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1947 if (!DECL_LANG_SPECIFIC (newdecl
))
1948 retrofit_lang_decl (newdecl
);
1950 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1951 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1955 /* Do this after calling `merge_types' so that default
1956 parameters don't confuse us. */
1957 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1958 check_redeclaration_exception_specification (newdecl
, olddecl
);
1959 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1961 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1962 check_default_args (newdecl
);
1964 /* Lay the type out, unless already done. */
1965 if (! same_type_p (newtype
, oldtype
)
1966 && TREE_TYPE (newdecl
) != error_mark_node
1967 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1968 layout_type (TREE_TYPE (newdecl
));
1970 if ((VAR_P (newdecl
)
1971 || TREE_CODE (newdecl
) == PARM_DECL
1972 || TREE_CODE (newdecl
) == RESULT_DECL
1973 || TREE_CODE (newdecl
) == FIELD_DECL
1974 || TREE_CODE (newdecl
) == TYPE_DECL
)
1975 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1976 layout_decl (newdecl
, 0);
1978 /* Merge the type qualifiers. */
1979 if (TREE_READONLY (newdecl
))
1980 TREE_READONLY (olddecl
) = 1;
1981 if (TREE_THIS_VOLATILE (newdecl
))
1982 TREE_THIS_VOLATILE (olddecl
) = 1;
1983 if (TREE_NOTHROW (newdecl
))
1984 TREE_NOTHROW (olddecl
) = 1;
1986 /* Merge deprecatedness. */
1987 if (TREE_DEPRECATED (newdecl
))
1988 TREE_DEPRECATED (olddecl
) = 1;
1990 /* Preserve function specific target and optimization options */
1991 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1993 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1994 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1995 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1996 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1998 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1999 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2000 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2001 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2004 /* Merge the initialization information. */
2005 if (DECL_INITIAL (newdecl
) == NULL_TREE
2006 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2008 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2009 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2010 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2012 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2013 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2017 /* Merge the section attribute.
2018 We want to issue an error if the sections conflict but that must be
2019 done later in decl_attributes since we are called before attributes
2021 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
2022 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
2024 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2026 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2027 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2028 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2029 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2030 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2031 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2032 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2033 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2034 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2035 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2036 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2037 /* Keep the old RTL. */
2038 COPY_DECL_RTL (olddecl
, newdecl
);
2040 else if (VAR_P (newdecl
)
2041 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2043 /* Keep the old RTL. We cannot keep the old RTL if the old
2044 declaration was for an incomplete object and the new
2045 declaration is not since many attributes of the RTL will
2047 COPY_DECL_RTL (olddecl
, newdecl
);
2050 /* If cannot merge, then use the new type and qualifiers,
2051 and don't preserve the old rtl. */
2054 /* Clean out any memory we had of the old declaration. */
2055 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2057 TREE_VALUE (oldstatic
) = error_mark_node
;
2059 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2060 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2061 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2062 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2065 /* Merge the storage class information. */
2066 merge_weak (newdecl
, olddecl
);
2068 if (DECL_ONE_ONLY (olddecl
))
2069 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2071 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2072 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2073 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2074 if (! DECL_EXTERNAL (olddecl
))
2075 DECL_EXTERNAL (newdecl
) = 0;
2077 new_template_info
= NULL_TREE
;
2078 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2080 bool new_redefines_gnu_inline
= false;
2082 if (new_defines_function
2083 && ((DECL_INTERFACE_KNOWN (olddecl
)
2084 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2085 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2086 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2087 == FUNCTION_DECL
))))
2091 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2092 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2094 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2097 if (!new_redefines_gnu_inline
)
2099 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2100 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2101 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2103 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2104 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2105 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2107 /* If the OLDDECL is an instantiation and/or specialization,
2108 then the NEWDECL must be too. But, it may not yet be marked
2109 as such if the caller has created NEWDECL, but has not yet
2110 figured out that it is a redeclaration. */
2111 if (!DECL_USE_TEMPLATE (newdecl
))
2112 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2114 /* Don't really know how much of the language-specific
2115 values we should copy from old to new. */
2116 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2117 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2118 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2119 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2121 if (LANG_DECL_HAS_MIN (newdecl
))
2123 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2124 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2125 if (DECL_TEMPLATE_INFO (newdecl
))
2126 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2127 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2129 /* Only functions have these fields. */
2130 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2132 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2133 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2134 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2135 && DECL_HIDDEN_FRIEND_P (olddecl
)
2136 && newdecl_is_friend
);
2137 DECL_BEFRIENDING_CLASSES (newdecl
)
2138 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2139 DECL_BEFRIENDING_CLASSES (olddecl
));
2140 /* DECL_THUNKS is only valid for virtual functions,
2141 otherwise it is a DECL_FRIEND_CONTEXT. */
2142 if (DECL_VIRTUAL_P (newdecl
))
2143 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2145 /* Only variables have this field. */
2146 else if (VAR_P (newdecl
)
2147 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2148 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2151 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2155 /* Merge parameter attributes. */
2156 tree oldarg
, newarg
;
2157 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2158 newarg
= DECL_ARGUMENTS(newdecl
);
2160 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2161 DECL_ATTRIBUTES (newarg
)
2162 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2163 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2166 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2167 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2169 /* If newdecl is not a specialization, then it is not a
2170 template-related function at all. And that means that we
2171 should have exited above, returning 0. */
2172 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2174 if (DECL_ODR_USED (olddecl
))
2175 /* From [temp.expl.spec]:
2177 If a template, a member template or the member of a class
2178 template is explicitly specialized then that
2179 specialization shall be declared before the first use of
2180 that specialization that would cause an implicit
2181 instantiation to take place, in every translation unit in
2182 which such a use occurs. */
2183 error ("explicit specialization of %qD after first use",
2186 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2188 /* Don't propagate visibility from the template to the
2189 specialization here. We'll do that in determine_visibility if
2191 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2193 /* [temp.expl.spec/14] We don't inline explicit specialization
2194 just because the primary template says so. */
2196 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2197 the always_inline attribute. */
2198 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2199 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2201 if (DECL_DECLARED_INLINE_P (newdecl
))
2202 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2204 DECL_ATTRIBUTES (newdecl
)
2205 = remove_attribute ("always_inline",
2206 DECL_ATTRIBUTES (newdecl
));
2209 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2211 /* Never inline re-defined extern inline functions.
2212 FIXME: this could be better handled by keeping both
2213 function as separate declarations. */
2214 DECL_UNINLINABLE (newdecl
) = 1;
2218 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2219 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2221 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2223 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2224 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2226 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2227 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2228 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2229 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2232 /* Preserve abstractness on cloned [cd]tors. */
2233 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2235 /* Update newdecl's parms to point at olddecl. */
2236 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2237 parm
= DECL_CHAIN (parm
))
2238 DECL_CONTEXT (parm
) = olddecl
;
2242 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2243 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2244 COPY_DECL_RTL (newdecl
, olddecl
);
2246 if (! types_match
|| new_defines_function
)
2248 /* These need to be copied so that the names are available.
2249 Note that if the types do match, we'll preserve inline
2250 info and other bits, but if not, we won't. */
2251 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2252 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2254 /* If redeclaring a builtin function, it stays built in
2255 if newdecl is a gnu_inline definition, or if newdecl is just
2257 if (DECL_BUILT_IN (olddecl
)
2258 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2260 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2261 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2262 /* If we're keeping the built-in definition, keep the rtl,
2263 regardless of declaration matches. */
2264 COPY_DECL_RTL (olddecl
, newdecl
);
2265 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2267 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2270 /* If a compatible prototype of these builtin functions
2271 is seen, assume the runtime implements it with the
2272 expected semantics. */
2273 case BUILT_IN_STPCPY
:
2274 if (builtin_decl_explicit_p (fncode
))
2275 set_builtin_decl_implicit_p (fncode
, true);
2282 if (new_defines_function
)
2283 /* If defining a function declared with other language
2284 linkage, use the previously declared language linkage. */
2285 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2286 else if (types_match
)
2288 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2289 /* Don't clear out the arguments if we're just redeclaring a
2291 if (DECL_ARGUMENTS (olddecl
))
2292 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2295 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2296 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2298 /* Now preserve various other info from the definition. */
2299 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2300 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2301 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2302 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2304 /* Warn about conflicting visibility specifications. */
2305 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2306 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2307 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2309 warning_at (input_location
, OPT_Wattributes
,
2310 "%q+D: visibility attribute ignored because it", newdecl
);
2311 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2312 "conflicts with previous declaration here");
2314 /* Choose the declaration which specified visibility. */
2315 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2317 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2318 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2320 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2321 so keep this behavior. */
2322 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2324 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2325 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2327 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2328 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2330 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2331 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2333 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2334 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2335 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2337 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2338 with that from NEWDECL below. */
2339 if (DECL_LANG_SPECIFIC (olddecl
))
2341 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2342 != DECL_LANG_SPECIFIC (newdecl
));
2343 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2346 /* Merge the USED information. */
2347 if (TREE_USED (olddecl
))
2348 TREE_USED (newdecl
) = 1;
2349 else if (TREE_USED (newdecl
))
2350 TREE_USED (olddecl
) = 1;
2351 if (VAR_P (newdecl
))
2353 if (DECL_READ_P (olddecl
))
2354 DECL_READ_P (newdecl
) = 1;
2355 else if (DECL_READ_P (newdecl
))
2356 DECL_READ_P (olddecl
) = 1;
2358 if (DECL_PRESERVE_P (olddecl
))
2359 DECL_PRESERVE_P (newdecl
) = 1;
2360 else if (DECL_PRESERVE_P (newdecl
))
2361 DECL_PRESERVE_P (olddecl
) = 1;
2363 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2364 to olddecl and deleted. */
2365 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2366 && DECL_FUNCTION_VERSIONED (olddecl
))
2368 /* Set the flag for newdecl so that it gets copied to olddecl. */
2369 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2370 /* newdecl will be purged after copying to olddecl and is no longer
2372 delete_function_version (newdecl
);
2375 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2379 function_size
= sizeof (struct tree_decl_common
);
2381 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2382 (char *) newdecl
+ sizeof (struct tree_common
),
2383 function_size
- sizeof (struct tree_common
));
2385 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2386 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2387 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2388 if (new_template_info
)
2389 /* If newdecl is a template instantiation, it is possible that
2390 the following sequence of events has occurred:
2392 o A friend function was declared in a class template. The
2393 class template was instantiated.
2395 o The instantiation of the friend declaration was
2396 recorded on the instantiation list, and is newdecl.
2398 o Later, however, instantiate_class_template called pushdecl
2399 on the newdecl to perform name injection. But, pushdecl in
2400 turn called duplicate_decls when it discovered that another
2401 declaration of a global function with the same name already
2404 o Here, in duplicate_decls, we decided to clobber newdecl.
2406 If we're going to do that, we'd better make sure that
2407 olddecl, and not newdecl, is on the list of
2408 instantiations so that if we try to do the instantiation
2409 again we won't get the clobbered declaration. */
2410 reregister_specialization (newdecl
,
2416 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2417 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2418 (char *) newdecl
+ sizeof (struct tree_common
),
2419 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2420 switch (TREE_CODE (olddecl
))
2430 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2431 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2432 size
- sizeof (struct tree_decl_common
)
2433 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2437 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2438 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2439 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2440 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2444 DECL_UID (olddecl
) = olddecl_uid
;
2446 DECL_FRIEND_P (olddecl
) = 1;
2449 DECL_ANTICIPATED (olddecl
) = 1;
2450 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2453 /* NEWDECL contains the merged attribute lists.
2454 Update OLDDECL to be the same. */
2455 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2457 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2458 so that encode_section_info has a chance to look at the new decl
2459 flags and attributes. */
2460 if (DECL_RTL_SET_P (olddecl
)
2461 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2463 && TREE_STATIC (olddecl
))))
2464 make_decl_rtl (olddecl
);
2466 /* The NEWDECL will no longer be needed. Because every out-of-class
2467 declaration of a member results in a call to duplicate_decls,
2468 freeing these nodes represents in a significant savings. */
2474 /* Return zero if the declaration NEWDECL is valid
2475 when the declaration OLDDECL (assumed to be for the same name)
2476 has already been seen.
2477 Otherwise return an error message format string with a %s
2478 where the identifier should go. */
2481 redeclaration_error_message (tree newdecl
, tree olddecl
)
2483 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2485 /* Because C++ can put things into name space for free,
2486 constructs like "typedef struct foo { ... } foo"
2487 would look like an erroneous redeclaration. */
2488 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2491 return G_("redefinition of %q#D");
2493 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2495 /* If this is a pure function, its olddecl will actually be
2496 the original initialization to `0' (which we force to call
2497 abort()). Don't complain about redefinition in this case. */
2498 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2499 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2502 /* If both functions come from different namespaces, this is not
2503 a redeclaration - this is a conflict with a used function. */
2504 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2505 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2506 && ! decls_match (olddecl
, newdecl
))
2507 return G_("%qD conflicts with used function");
2509 /* We'll complain about linkage mismatches in
2510 warn_extern_redeclared_static. */
2512 /* Defining the same name twice is no good. */
2513 if (DECL_INITIAL (olddecl
) != NULL_TREE
2514 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2516 if (DECL_NAME (olddecl
) == NULL_TREE
)
2517 return G_("%q#D not declared in class");
2518 else if (!GNU_INLINE_P (olddecl
)
2519 || GNU_INLINE_P (newdecl
))
2520 return G_("redefinition of %q#D");
2523 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2525 bool olda
= GNU_INLINE_P (olddecl
);
2526 bool newa
= GNU_INLINE_P (newdecl
);
2531 return G_("%q+D redeclared inline with "
2532 "%<gnu_inline%> attribute");
2534 return G_("%q+D redeclared inline without "
2535 "%<gnu_inline%> attribute");
2539 check_abi_tag_redeclaration
2540 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2541 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2545 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2549 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2551 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2552 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2553 return G_("redefinition of %q#D");
2557 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2558 || (DECL_TEMPLATE_RESULT (newdecl
)
2559 == DECL_TEMPLATE_RESULT (olddecl
)))
2562 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2563 if (DECL_TEMPLATE_INFO (nt
))
2564 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2565 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2566 if (DECL_TEMPLATE_INFO (ot
))
2567 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2568 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2569 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2570 return G_("redefinition of %q#D");
2572 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2574 bool olda
= GNU_INLINE_P (ot
);
2575 bool newa
= GNU_INLINE_P (nt
);
2580 return G_("%q+D redeclared inline with "
2581 "%<gnu_inline%> attribute");
2583 return G_("%q+D redeclared inline without "
2584 "%<gnu_inline%> attribute");
2588 /* Core issue #226 (C++0x):
2590 If a friend function template declaration specifies a
2591 default template-argument, that declaration shall be a
2592 definition and shall be the only declaration of the
2593 function template in the translation unit. */
2594 if ((cxx_dialect
!= cxx98
)
2595 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2596 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2597 /*is_primary=*/true,
2598 /*is_partial=*/false,
2599 /*is_friend_decl=*/2))
2600 return G_("redeclaration of friend %q#D "
2601 "may not have default template arguments");
2605 else if (VAR_P (newdecl
)
2606 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2607 && (! DECL_LANG_SPECIFIC (olddecl
)
2608 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2609 || DECL_THREAD_LOCAL_P (newdecl
)))
2611 /* Only variables can be thread-local, and all declarations must
2612 agree on this property. */
2613 if (DECL_THREAD_LOCAL_P (newdecl
))
2614 return G_("thread-local declaration of %q#D follows "
2615 "non-thread-local declaration");
2617 return G_("non-thread-local declaration of %q#D follows "
2618 "thread-local declaration");
2620 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2622 /* The objects have been declared at namespace scope. If either
2623 is a member of an anonymous union, then this is an invalid
2624 redeclaration. For example:
2630 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2631 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2632 return G_("redeclaration of %q#D");
2633 /* If at least one declaration is a reference, there is no
2634 conflict. For example:
2640 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2642 /* Reject two definitions. */
2643 return G_("redefinition of %q#D");
2647 /* Objects declared with block scope: */
2648 /* Reject two definitions, and reject a definition
2649 together with an external reference. */
2650 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2651 return G_("redeclaration of %q#D");
2656 /* Hash and equality functions for the named_label table. */
2659 named_label_entry_hash (const void *data
)
2661 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2662 return DECL_UID (ent
->label_decl
);
2666 named_label_entry_eq (const void *a
, const void *b
)
2668 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2669 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2670 return ent_a
->label_decl
== ent_b
->label_decl
;
2673 /* Create a new label, named ID. */
2676 make_label_decl (tree id
, int local_p
)
2678 struct named_label_entry
*ent
;
2682 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2684 DECL_CONTEXT (decl
) = current_function_decl
;
2685 DECL_MODE (decl
) = VOIDmode
;
2686 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2688 /* Say where one reference is to the label, for the sake of the
2689 error if it is not defined. */
2690 DECL_SOURCE_LOCATION (decl
) = input_location
;
2692 /* Record the fact that this identifier is bound to this label. */
2693 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2695 /* Create the label htab for the function on demand. */
2697 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2698 named_label_entry_eq
, NULL
);
2700 /* Record this label on the list of labels used in this function.
2701 We do this before calling make_label_decl so that we get the
2702 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2703 ent
= ggc_alloc_cleared_named_label_entry ();
2704 ent
->label_decl
= decl
;
2706 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2707 gcc_assert (*slot
== NULL
);
2713 /* Look for a label named ID in the current function. If one cannot
2714 be found, create one. (We keep track of used, but undefined,
2715 labels, and complain about them at the end of a function.) */
2718 lookup_label_1 (tree id
)
2722 /* You can't use labels at global scope. */
2723 if (current_function_decl
== NULL_TREE
)
2725 error ("label %qE referenced outside of any function", id
);
2729 /* See if we've already got this label. */
2730 decl
= IDENTIFIER_LABEL_VALUE (id
);
2731 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2734 decl
= make_label_decl (id
, /*local_p=*/0);
2738 /* Wrapper for lookup_label_1. */
2741 lookup_label (tree id
)
2744 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2745 ret
= lookup_label_1 (id
);
2746 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2750 /* Declare a local label named ID. */
2753 declare_local_label (tree id
)
2756 cp_label_binding bind
;
2758 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2759 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2760 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2762 decl
= make_label_decl (id
, /*local_p=*/1);
2764 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2769 /* Returns nonzero if it is ill-formed to jump past the declaration of
2770 DECL. Returns 2 if it's also a real problem. */
2773 decl_jump_unsafe (tree decl
)
2775 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2776 with automatic storage duration is not in scope to a point where it is
2777 in scope is ill-formed unless the variable has scalar type, class type
2778 with a trivial default constructor and a trivial destructor, a
2779 cv-qualified version of one of these types, or an array of one of the
2780 preceding types and is declared without an initializer (8.5). */
2781 tree type
= TREE_TYPE (decl
);
2783 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2784 || type
== error_mark_node
)
2787 type
= strip_array_types (type
);
2789 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2792 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2798 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2801 identify_goto (tree decl
, const location_t
*locus
)
2804 permerror (input_location
, "jump to label %qD", decl
);
2806 permerror (input_location
, "jump to case label");
2808 permerror (*locus
, " from here");
2811 /* Check that a single previously seen jump to a newly defined label
2812 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2813 the jump context; NAMES are the names in scope in LEVEL at the jump
2814 context; LOCUS is the source position of the jump or 0. Returns
2815 true if all is well. */
2818 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2819 bool exited_omp
, const location_t
*locus
)
2821 cp_binding_level
*b
;
2822 bool identified
= false, saw_eh
= false, saw_omp
= false;
2826 identify_goto (decl
, locus
);
2827 error (" exits OpenMP structured block");
2828 identified
= saw_omp
= true;
2831 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2833 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2835 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2836 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2837 : TREE_CHAIN (new_decls
)))
2839 int problem
= decl_jump_unsafe (new_decls
);
2845 identify_goto (decl
, locus
);
2849 error (" crosses initialization of %q+#D", new_decls
);
2851 permerror (input_location
, " enters scope of %q+#D which has "
2852 "non-trivial destructor", new_decls
);
2857 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2861 identify_goto (decl
, locus
);
2864 if (b
->kind
== sk_try
)
2865 error (" enters try block");
2867 error (" enters catch block");
2870 if (b
->kind
== sk_omp
&& !saw_omp
)
2874 identify_goto (decl
, locus
);
2877 error (" enters OpenMP structured block");
2886 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2888 check_previous_goto_1 (decl
, use
->binding_level
,
2889 use
->names_in_scope
, use
->in_omp_scope
,
2890 &use
->o_goto_locus
);
2894 check_switch_goto (cp_binding_level
* level
)
2896 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2899 /* Check that a new jump to a label DECL is OK. Called by
2900 finish_goto_stmt. */
2903 check_goto (tree decl
)
2905 struct named_label_entry
*ent
, dummy
;
2906 bool saw_catch
= false, identified
= false;
2910 /* We can't know where a computed goto is jumping.
2911 So we assume that it's OK. */
2912 if (TREE_CODE (decl
) != LABEL_DECL
)
2915 /* We didn't record any information about this label when we created it,
2916 and there's not much point since it's trivial to analyze as a return. */
2917 if (decl
== cdtor_label
)
2920 dummy
.label_decl
= decl
;
2921 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2922 gcc_assert (ent
!= NULL
);
2924 /* If the label hasn't been defined yet, defer checking. */
2925 if (! DECL_INITIAL (decl
))
2927 struct named_label_use_entry
*new_use
;
2929 /* Don't bother creating another use if the last goto had the
2930 same data, and will therefore create the same set of errors. */
2932 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2935 new_use
= ggc_alloc_named_label_use_entry ();
2936 new_use
->binding_level
= current_binding_level
;
2937 new_use
->names_in_scope
= current_binding_level
->names
;
2938 new_use
->o_goto_locus
= input_location
;
2939 new_use
->in_omp_scope
= false;
2941 new_use
->next
= ent
->uses
;
2942 ent
->uses
= new_use
;
2946 if (ent
->in_try_scope
|| ent
->in_catch_scope
2947 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2949 permerror (input_location
, "jump to label %q+D", decl
);
2950 permerror (input_location
, " from here");
2954 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2956 int u
= decl_jump_unsafe (bad
);
2958 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2960 /* Can't skip init of __exception_info. */
2961 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2965 error (" skips initialization of %q+#D", bad
);
2967 permerror (input_location
, " enters scope of %q+#D which has "
2968 "non-trivial destructor", bad
);
2971 if (ent
->in_try_scope
)
2972 error (" enters try block");
2973 else if (ent
->in_catch_scope
&& !saw_catch
)
2974 error (" enters catch block");
2976 if (ent
->in_omp_scope
)
2977 error (" enters OpenMP structured block");
2978 else if (flag_openmp
)
2980 cp_binding_level
*b
;
2981 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2983 if (b
== ent
->binding_level
)
2985 if (b
->kind
== sk_omp
)
2989 permerror (input_location
, "jump to label %q+D", decl
);
2990 permerror (input_location
, " from here");
2993 error (" exits OpenMP structured block");
3000 /* Check that a return is ok wrt OpenMP structured blocks.
3001 Called by finish_return_stmt. Returns true if all is well. */
3004 check_omp_return (void)
3006 cp_binding_level
*b
;
3007 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3008 if (b
->kind
== sk_omp
)
3010 error ("invalid exit from OpenMP structured block");
3013 else if (b
->kind
== sk_function_parms
)
3018 /* Define a label, specifying the location in the source file.
3019 Return the LABEL_DECL node for the label. */
3022 define_label_1 (location_t location
, tree name
)
3024 struct named_label_entry
*ent
, dummy
;
3025 cp_binding_level
*p
;
3028 decl
= lookup_label (name
);
3030 dummy
.label_decl
= decl
;
3031 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
3032 gcc_assert (ent
!= NULL
);
3034 /* After labels, make any new cleanups in the function go into their
3035 own new (temporary) binding contour. */
3036 for (p
= current_binding_level
;
3037 p
->kind
!= sk_function_parms
;
3039 p
->more_cleanups_ok
= 0;
3041 if (name
== get_identifier ("wchar_t"))
3042 permerror (input_location
, "label named wchar_t");
3044 if (DECL_INITIAL (decl
) != NULL_TREE
)
3046 error ("duplicate label %qD", decl
);
3047 return error_mark_node
;
3051 struct named_label_use_entry
*use
;
3053 /* Mark label as having been defined. */
3054 DECL_INITIAL (decl
) = error_mark_node
;
3055 /* Say where in the source. */
3056 DECL_SOURCE_LOCATION (decl
) = location
;
3058 ent
->binding_level
= current_binding_level
;
3059 ent
->names_in_scope
= current_binding_level
->names
;
3061 for (use
= ent
->uses
; use
; use
= use
->next
)
3062 check_previous_goto (decl
, use
);
3069 /* Wrapper for define_label_1. */
3072 define_label (location_t location
, tree name
)
3075 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3076 ret
= define_label_1 (location
, name
);
3077 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3084 cp_binding_level
*level
;
3085 struct cp_switch
*next
;
3086 /* The SWITCH_STMT being built. */
3088 /* A splay-tree mapping the low element of a case range to the high
3089 element, or NULL_TREE if there is no high element. Used to
3090 determine whether or not a new case label duplicates an old case
3091 label. We need a tree, rather than simply a hash table, because
3092 of the GNU case range extension. */
3096 /* A stack of the currently active switch statements. The innermost
3097 switch statement is on the top of the stack. There is no need to
3098 mark the stack for garbage collection because it is only active
3099 during the processing of the body of a function, and we never
3100 collect at that point. */
3102 static struct cp_switch
*switch_stack
;
3104 /* Called right after a switch-statement condition is parsed.
3105 SWITCH_STMT is the switch statement being parsed. */
3108 push_switch (tree switch_stmt
)
3110 struct cp_switch
*p
= XNEW (struct cp_switch
);
3111 p
->level
= current_binding_level
;
3112 p
->next
= switch_stack
;
3113 p
->switch_stmt
= switch_stmt
;
3114 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3121 struct cp_switch
*cs
= switch_stack
;
3122 location_t switch_location
;
3124 /* Emit warnings as needed. */
3125 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3126 if (!processing_template_decl
)
3127 c_do_switch_warnings (cs
->cases
, switch_location
,
3128 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3129 SWITCH_STMT_COND (cs
->switch_stmt
));
3131 splay_tree_delete (cs
->cases
);
3132 switch_stack
= switch_stack
->next
;
3136 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3137 condition. Note that if TYPE and VALUE are already integral we don't
3138 really do the conversion because the language-independent
3139 warning/optimization code will work better that way. */
3142 case_conversion (tree type
, tree value
)
3144 if (value
== NULL_TREE
)
3147 if (cxx_dialect
>= cxx0x
3148 && (SCOPED_ENUM_P (type
)
3149 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3151 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3152 type
= type_promotes_to (type
);
3153 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3155 return cxx_constant_value (value
);
3158 /* Note that we've seen a definition of a case label, and complain if this
3159 is a bad place for one. */
3162 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3165 cp_binding_level
*p
;
3168 if (processing_template_decl
)
3172 /* For templates, just add the case label; we'll do semantic
3173 analysis at instantiation-time. */
3174 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3175 return add_stmt (build_case_label (low_value
, high_value
, label
));
3178 /* Find the condition on which this switch statement depends. */
3179 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3180 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3181 cond
= TREE_VALUE (cond
);
3183 if (!check_switch_goto (switch_stack
->level
))
3184 return error_mark_node
;
3186 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3188 low_value
= case_conversion (type
, low_value
);
3189 high_value
= case_conversion (type
, high_value
);
3191 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3192 low_value
, high_value
);
3194 /* After labels, make any new cleanups in the function go into their
3195 own new (temporary) binding contour. */
3196 for (p
= current_binding_level
;
3197 p
->kind
!= sk_function_parms
;
3199 p
->more_cleanups_ok
= 0;
3204 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3207 typename_hash (const void* k
)
3210 const_tree
const t
= (const_tree
) k
;
3212 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3213 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3218 typedef struct typename_info
{
3226 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3227 really of type `typename_info*' */
3230 typename_compare (const void * k1
, const void * k2
)
3232 const_tree
const t1
= (const_tree
) k1
;
3233 const typename_info
*const t2
= (const typename_info
*) k2
;
3235 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3236 && TYPE_CONTEXT (t1
) == t2
->scope
3237 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3238 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3239 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3242 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3243 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3245 Returns the new TYPENAME_TYPE. */
3247 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3250 build_typename_type (tree context
, tree name
, tree fullname
,
3251 enum tag_types tag_type
)
3259 if (typename_htab
== NULL
)
3260 typename_htab
= htab_create_ggc (61, &typename_hash
,
3261 &typename_compare
, NULL
);
3263 ti
.scope
= FROB_CONTEXT (context
);
3265 ti
.template_id
= fullname
;
3266 ti
.enum_p
= tag_type
== enum_type
;
3267 ti
.class_p
= (tag_type
== class_type
3268 || tag_type
== record_type
3269 || tag_type
== union_type
);
3270 hash
= (htab_hash_pointer (ti
.scope
)
3271 ^ htab_hash_pointer (ti
.name
));
3273 /* See if we already have this type. */
3274 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3279 /* Build the TYPENAME_TYPE. */
3280 t
= cxx_make_type (TYPENAME_TYPE
);
3281 TYPE_CONTEXT (t
) = ti
.scope
;
3282 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3283 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3284 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3286 /* Build the corresponding TYPE_DECL. */
3287 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3288 TYPE_NAME (TREE_TYPE (d
)) = d
;
3289 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3290 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3291 DECL_ARTIFICIAL (d
) = 1;
3293 /* Store it in the hash table. */
3296 /* TYPENAME_TYPEs must always be compared structurally, because
3297 they may or may not resolve down to another type depending on
3298 the currently open classes. */
3299 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3305 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3306 provided to name the type. Returns an appropriate type, unless an
3307 error occurs, in which case error_mark_node is returned. If we
3308 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3309 return that, rather than the _TYPE it corresponds to, in other
3310 cases we look through the type decl. If TF_ERROR is set, complain
3311 about errors, otherwise be quiet. */
3314 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3315 tsubst_flags_t complain
)
3321 if (name
== error_mark_node
3322 || context
== NULL_TREE
3323 || context
== error_mark_node
)
3324 return error_mark_node
;
3328 if (!(TYPE_LANG_SPECIFIC (name
)
3329 && (CLASSTYPE_IS_TEMPLATE (name
)
3330 || CLASSTYPE_USE_TEMPLATE (name
))))
3331 name
= TYPE_IDENTIFIER (name
);
3333 /* Create a TEMPLATE_ID_EXPR for the type. */
3334 name
= build_nt (TEMPLATE_ID_EXPR
,
3335 CLASSTYPE_TI_TEMPLATE (name
),
3336 CLASSTYPE_TI_ARGS (name
));
3338 else if (TREE_CODE (name
) == TYPE_DECL
)
3339 name
= DECL_NAME (name
);
3343 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3345 name
= TREE_OPERAND (name
, 0);
3346 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3347 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3348 else if (TREE_CODE (name
) == OVERLOAD
)
3350 if (complain
& tf_error
)
3351 error ("%qD is not a type", name
);
3352 return error_mark_node
;
3355 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3357 if (complain
& tf_error
)
3358 error ("%qD used without template parameters", name
);
3359 return error_mark_node
;
3361 gcc_assert (identifier_p (name
));
3362 gcc_assert (TYPE_P (context
));
3364 if (!MAYBE_CLASS_TYPE_P (context
))
3366 if (complain
& tf_error
)
3367 error ("%q#T is not a class", context
);
3368 return error_mark_node
;
3371 /* When the CONTEXT is a dependent type, NAME could refer to a
3372 dependent base class of CONTEXT. But look inside it anyway
3373 if CONTEXT is a currently open scope, in case it refers to a
3374 member of the current instantiation or a non-dependent base;
3375 lookup will stop when we hit a dependent base. */
3376 if (!dependent_scope_p (context
))
3377 /* We should only set WANT_TYPE when we're a nested typename type.
3378 Then we can give better diagnostics if we find a non-type. */
3379 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3383 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3384 return build_typename_type (context
, name
, fullname
, tag_type
);
3386 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3390 if (complain
& tf_error
)
3391 error (want_template
? G_("no class template named %q#T in %q#T")
3392 : G_("no type named %q#T in %q#T"), name
, context
);
3393 return error_mark_node
;
3396 /* Pull out the template from an injected-class-name (or multiple). */
3398 t
= maybe_get_template_decl_from_type_decl (t
);
3400 if (TREE_CODE (t
) == TREE_LIST
)
3402 if (complain
& tf_error
)
3404 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3405 print_candidates (t
);
3407 return error_mark_node
;
3410 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3412 if (complain
& tf_error
)
3413 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3415 return error_mark_node
;
3417 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3419 if (complain
& tf_error
)
3420 error ("%<typename %T::%D%> names %q#T, which is not a type",
3422 return error_mark_node
;
3425 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3426 return error_mark_node
;
3428 /* If we are currently parsing a template and if T is a typedef accessed
3429 through CONTEXT then we need to remember and check access of T at
3430 template instantiation time. */
3431 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3434 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3436 /*entering_scope=*/0,
3437 tf_warning_or_error
| tf_user
);
3439 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3442 maybe_record_typedef_use (t
);
3447 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3448 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3449 in which case error_mark_node is returned.
3451 If PARM_LIST is non-NULL, also make sure that the template parameter
3452 list of TEMPLATE_DECL matches.
3454 If COMPLAIN zero, don't complain about any errors that occur. */
3457 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3458 tsubst_flags_t complain
)
3464 name
= TYPE_IDENTIFIER (name
);
3465 else if (DECL_P (name
))
3466 name
= DECL_NAME (name
);
3467 gcc_assert (identifier_p (name
));
3469 if (!dependent_type_p (context
)
3470 || currently_open_class (context
))
3472 tree tmpl
= NULL_TREE
;
3474 if (MAYBE_CLASS_TYPE_P (context
))
3475 tmpl
= lookup_field (context
, name
, 0, false);
3477 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3478 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3480 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3482 if (complain
& tf_error
)
3483 error ("no class template named %q#T in %q#T", name
, context
);
3484 return error_mark_node
;
3488 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3490 if (complain
& tf_error
)
3492 error ("template parameters do not match template");
3493 error ("%q+D declared here", tmpl
);
3495 return error_mark_node
;
3498 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3500 return error_mark_node
;
3505 /* Build the UNBOUND_CLASS_TEMPLATE. */
3506 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3507 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3508 TREE_TYPE (t
) = NULL_TREE
;
3509 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3511 /* Build the corresponding TEMPLATE_DECL. */
3512 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3513 TYPE_NAME (TREE_TYPE (d
)) = d
;
3514 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3515 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3516 DECL_ARTIFICIAL (d
) = 1;
3517 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3524 /* Push the declarations of builtin types into the namespace.
3525 RID_INDEX is the index of the builtin type in the array
3526 RID_POINTERS. NAME is the name used when looking up the builtin
3527 type. TYPE is the _TYPE node for the builtin type. */
3530 record_builtin_type (enum rid rid_index
,
3534 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3535 tree tdecl
= NULL_TREE
;
3537 if ((int) rid_index
< (int) RID_MAX
)
3538 rname
= ridpointers
[(int) rid_index
];
3540 tname
= get_identifier (name
);
3542 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3543 eliminated. Built-in types should not be looked up name; their
3544 names are keywords that the parser can recognize. However, there
3545 is code in c-common.c that uses identifier_global_value to look
3546 up built-in types by name. */
3549 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3550 DECL_ARTIFICIAL (tdecl
) = 1;
3551 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3557 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3558 DECL_ARTIFICIAL (tdecl
) = 1;
3560 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3563 if (!TYPE_NAME (type
))
3564 TYPE_NAME (type
) = tdecl
;
3567 debug_hooks
->type_decl (tdecl
, 0);
3570 /* Record one of the standard Java types.
3571 * Declare it as having the given NAME.
3572 * If SIZE > 0, it is the size of one of the integral types;
3573 * otherwise it is the negative of the size of one of the other types. */
3576 record_builtin_java_type (const char* name
, int size
)
3581 type
= build_nonstandard_integer_type (size
, 0);
3582 type
= build_distinct_type_copy (type
);
3584 else if (size
> -32)
3587 /* "__java_char" or ""__java_boolean". */
3588 type
= build_nonstandard_integer_type (-size
, 1);
3589 type
= build_distinct_type_copy (type
);
3590 /* Get the signed type cached and attached to the unsigned type,
3591 so it doesn't get garbage-collected at "random" times,
3592 causing potential codegen differences out of different UIDs
3593 and different alias set numbers. */
3594 stype
= build_nonstandard_integer_type (-size
, 0);
3595 stype
= build_distinct_type_copy (stype
);
3596 TREE_CHAIN (type
) = stype
;
3597 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3600 { /* "__java_float" or ""__java_double". */
3601 type
= make_node (REAL_TYPE
);
3602 TYPE_PRECISION (type
) = - size
;
3605 record_builtin_type (RID_MAX
, name
, type
);
3606 decl
= TYPE_NAME (type
);
3608 /* Suppress generate debug symbol entries for these types,
3609 since for normal C++ they are just clutter.
3610 However, push_lang_context undoes this if extern "Java" is seen. */
3611 DECL_IGNORED_P (decl
) = 1;
3613 TYPE_FOR_JAVA (type
) = 1;
3617 /* Push a type into the namespace so that the back ends ignore it. */
3620 record_unknown_type (tree type
, const char* name
)
3622 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3623 TYPE_DECL
, get_identifier (name
), type
));
3624 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3625 DECL_IGNORED_P (decl
) = 1;
3626 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3627 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3628 TYPE_ALIGN (type
) = 1;
3629 TYPE_USER_ALIGN (type
) = 0;
3630 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3633 /* A string for which we should create an IDENTIFIER_NODE at
3636 typedef struct predefined_identifier
3638 /* The name of the identifier. */
3639 const char *const name
;
3640 /* The place where the IDENTIFIER_NODE should be stored. */
3642 /* Nonzero if this is the name of a constructor or destructor. */
3643 const int ctor_or_dtor_p
;
3644 } predefined_identifier
;
3646 /* Create all the predefined identifiers. */
3649 initialize_predefined_identifiers (void)
3651 const predefined_identifier
*pid
;
3653 /* A table of identifiers to create at startup. */
3654 static const predefined_identifier predefined_identifiers
[] = {
3655 { "C++", &lang_name_cplusplus
, 0 },
3656 { "C", &lang_name_c
, 0 },
3657 { "Java", &lang_name_java
, 0 },
3658 /* Some of these names have a trailing space so that it is
3659 impossible for them to conflict with names written by users. */
3660 { "__ct ", &ctor_identifier
, 1 },
3661 { "__base_ctor ", &base_ctor_identifier
, 1 },
3662 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3663 { "__dt ", &dtor_identifier
, 1 },
3664 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3665 { "__base_dtor ", &base_dtor_identifier
, 1 },
3666 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3667 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3668 { "nelts", &nelts_identifier
, 0 },
3669 { THIS_NAME
, &this_identifier
, 0 },
3670 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3671 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3672 { "_vptr", &vptr_identifier
, 0 },
3673 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3674 { "::", &global_scope_name
, 0 },
3675 { "std", &std_identifier
, 0 },
3679 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3681 *pid
->node
= get_identifier (pid
->name
);
3682 if (pid
->ctor_or_dtor_p
)
3683 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3687 /* Create the predefined scalar types of C,
3688 and some nodes representing standard constants (0, 1, (void *)0).
3689 Initialize the global binding level.
3690 Make definitions for built-in primitive functions. */
3693 cxx_init_decl_processing (void)
3696 tree void_ftype_ptr
;
3698 /* Create all the identifiers we need. */
3699 initialize_predefined_identifiers ();
3701 /* Create the global variables. */
3702 push_to_top_level ();
3704 current_function_decl
= NULL_TREE
;
3705 current_binding_level
= NULL
;
3706 /* Enter the global namespace. */
3707 gcc_assert (global_namespace
== NULL_TREE
);
3708 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3710 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3711 TREE_PUBLIC (global_namespace
) = 1;
3712 begin_scope (sk_namespace
, global_namespace
);
3714 if (flag_visibility_ms_compat
)
3715 default_visibility
= VISIBILITY_HIDDEN
;
3718 current_lang_name
= lang_name_c
;
3720 /* Create the `std' namespace. */
3721 push_namespace (std_identifier
);
3722 std_node
= current_namespace
;
3725 c_common_nodes_and_builtins ();
3727 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3728 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3729 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3730 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3731 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3732 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3733 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3734 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3736 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3738 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3739 truthvalue_type_node
= boolean_type_node
;
3740 truthvalue_false_node
= boolean_false_node
;
3741 truthvalue_true_node
= boolean_true_node
;
3743 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3744 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3745 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3748 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3751 delta_type_node
= ptrdiff_type_node
;
3752 vtable_index_type
= ptrdiff_type_node
;
3754 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3755 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3756 void_ftype_ptr
= build_function_type_list (void_type_node
,
3757 ptr_type_node
, NULL_TREE
);
3759 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3761 /* C++ extensions */
3763 unknown_type_node
= make_node (LANG_TYPE
);
3764 record_unknown_type (unknown_type_node
, "unknown type");
3766 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3767 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3769 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3771 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3772 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3774 init_list_type_node
= make_node (LANG_TYPE
);
3775 record_unknown_type (init_list_type_node
, "init list");
3778 /* Make sure we get a unique function type, so we can give
3779 its pointer type a name. (This wins for gdb.) */
3780 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3781 TREE_TYPE (vfunc_type
) = integer_type_node
;
3782 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3783 layout_type (vfunc_type
);
3785 vtable_entry_type
= build_pointer_type (vfunc_type
);
3787 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3790 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3791 layout_type (vtbl_type_node
);
3792 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3793 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3794 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3795 layout_type (vtbl_ptr_type_node
);
3796 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3798 push_namespace (get_identifier ("__cxxabiv1"));
3799 abi_node
= current_namespace
;
3802 global_type_node
= make_node (LANG_TYPE
);
3803 record_unknown_type (global_type_node
, "global type");
3806 current_lang_name
= lang_name_cplusplus
;
3809 tree newattrs
, extvisattr
;
3810 tree newtype
, deltype
;
3811 tree ptr_ftype_sizetype
;
3815 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3816 if (cxx_dialect
== cxx98
)
3819 tree bad_alloc_type_node
;
3820 tree bad_alloc_decl
;
3822 push_namespace (std_identifier
);
3823 bad_alloc_id
= get_identifier ("bad_alloc");
3824 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3825 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3827 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3828 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3832 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3835 new_eh_spec
= noexcept_false_spec
;
3837 /* Ensure attribs.c is initialized. */
3839 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3841 newattrs
= tree_cons (get_identifier ("alloc_size"),
3842 build_tree_list (NULL_TREE
, integer_one_node
),
3844 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3845 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3846 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3847 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3848 push_cp_library_fn (NEW_EXPR
, newtype
);
3849 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3850 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3851 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3853 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3854 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3855 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3856 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3857 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3858 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3859 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3860 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3864 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3866 /* Perform other language dependent initializations. */
3867 init_class_processing ();
3868 init_rtti_processing ();
3869 init_template_processing ();
3871 if (flag_exceptions
)
3872 init_exception_processing ();
3874 if (! supports_one_only ())
3877 make_fname_decl
= cp_make_fname_decl
;
3878 start_fname_decls ();
3880 /* Show we use EH for cleanups. */
3881 if (flag_exceptions
)
3882 using_eh_for_cleanups ();
3885 /* Generate an initializer for a function naming variable from
3886 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3887 filled in with the type of the init. */
3890 cp_fname_init (const char* name
, tree
*type_p
)
3892 tree domain
= NULL_TREE
;
3894 tree init
= NULL_TREE
;
3899 length
= strlen (name
);
3900 domain
= build_index_type (size_int (length
));
3901 init
= build_string (length
+ 1, name
);
3904 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3905 type
= build_cplus_array_type (type
, domain
);
3910 TREE_TYPE (init
) = type
;
3912 init
= error_mark_node
;
3917 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3918 the decl, LOC is the location to give the decl, NAME is the
3919 initialization string and TYPE_DEP indicates whether NAME depended
3920 on the type of the function. We make use of that to detect
3921 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3922 at the point of first use, so we mustn't push the decl now. */
3925 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3927 const char *const name
= (type_dep
&& processing_template_decl
3928 ? NULL
: fname_as_string (type_dep
));
3930 tree init
= cp_fname_init (name
, &type
);
3931 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3934 free (CONST_CAST (char *, name
));
3936 /* As we're using pushdecl_with_scope, we must set the context. */
3937 DECL_CONTEXT (decl
) = current_function_decl
;
3939 TREE_STATIC (decl
) = 1;
3940 TREE_READONLY (decl
) = 1;
3941 DECL_ARTIFICIAL (decl
) = 1;
3943 TREE_USED (decl
) = 1;
3945 if (current_function_decl
)
3947 cp_binding_level
*b
= current_binding_level
;
3948 if (b
->kind
== sk_function_parms
)
3949 return error_mark_node
;
3950 while (b
->level_chain
->kind
!= sk_function_parms
)
3952 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3953 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3954 LOOKUP_ONLYCONVERTING
);
3958 DECL_THIS_STATIC (decl
) = true;
3959 pushdecl_top_level_and_finish (decl
, init
);
3966 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3968 tree id
= DECL_NAME (decl
);
3969 const char *name
= IDENTIFIER_POINTER (id
);
3971 retrofit_lang_decl (decl
);
3973 DECL_ARTIFICIAL (decl
) = 1;
3974 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3975 SET_DECL_LANGUAGE (decl
, lang_c
);
3976 /* Runtime library routines are, by definition, available in an
3977 external shared object. */
3978 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3979 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3981 DECL_CONTEXT (decl
) = context
;
3984 pushdecl_top_level (decl
);
3988 /* A function in the user's namespace should have an explicit
3989 declaration before it is used. Mark the built-in function as
3990 anticipated but not actually declared. */
3991 if (name
[0] != '_' || name
[1] != '_')
3992 DECL_ANTICIPATED (decl
) = 1;
3993 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3995 size_t len
= strlen (name
);
3997 /* Treat __*_chk fortification functions as anticipated as well,
3998 unless they are __builtin_*. */
3999 if (len
> strlen ("___chk")
4000 && memcmp (name
+ len
- strlen ("_chk"),
4001 "_chk", strlen ("_chk") + 1) == 0)
4002 DECL_ANTICIPATED (decl
) = 1;
4009 cxx_builtin_function (tree decl
)
4011 tree id
= DECL_NAME (decl
);
4012 const char *name
= IDENTIFIER_POINTER (id
);
4013 /* All builtins that don't begin with an '_' should additionally
4014 go in the 'std' namespace. */
4017 tree decl2
= copy_node(decl
);
4018 push_namespace (std_identifier
);
4019 builtin_function_1 (decl2
, std_node
, false);
4023 return builtin_function_1 (decl
, NULL_TREE
, false);
4026 /* Like cxx_builtin_function, but guarantee the function is added to the global
4027 scope. This is to allow function specific options to add new machine
4028 dependent builtins when the target ISA changes via attribute((target(...)))
4029 which saves space on program startup if the program does not use non-generic
4033 cxx_builtin_function_ext_scope (tree decl
)
4036 tree id
= DECL_NAME (decl
);
4037 const char *name
= IDENTIFIER_POINTER (id
);
4038 /* All builtins that don't begin with an '_' should additionally
4039 go in the 'std' namespace. */
4042 tree decl2
= copy_node(decl
);
4043 push_namespace (std_identifier
);
4044 builtin_function_1 (decl2
, std_node
, true);
4048 return builtin_function_1 (decl
, NULL_TREE
, true);
4051 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4052 function. Not called directly. */
4055 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
4057 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4058 DECL_EXTERNAL (fn
) = 1;
4059 TREE_PUBLIC (fn
) = 1;
4060 DECL_ARTIFICIAL (fn
) = 1;
4061 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4062 SET_DECL_LANGUAGE (fn
, lang_c
);
4063 /* Runtime library routines are, by definition, available in an
4064 external shared object. */
4065 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4066 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4070 /* Returns the _DECL for a library function with C linkage.
4071 We assume that such functions never throw; if this is incorrect,
4072 callers should unset TREE_NOTHROW. */
4075 build_library_fn (tree name
, tree type
)
4077 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
4078 TREE_NOTHROW (fn
) = 1;
4082 /* Returns the _DECL for a library function with C++ linkage. */
4085 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
4087 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
4088 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
4089 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4090 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4094 /* Like build_library_fn, but takes a C string instead of an
4098 build_library_fn_ptr (const char* name
, tree type
)
4100 return build_library_fn (get_identifier (name
), type
);
4103 /* Like build_cp_library_fn, but takes a C string instead of an
4107 build_cp_library_fn_ptr (const char* name
, tree type
)
4109 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
4112 /* Like build_library_fn, but also pushes the function so that we will
4113 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4114 may throw exceptions listed in RAISES. */
4117 push_library_fn (tree name
, tree type
, tree raises
)
4122 type
= build_exception_variant (type
, raises
);
4124 fn
= build_library_fn (name
, type
);
4125 pushdecl_top_level (fn
);
4129 /* Like build_cp_library_fn, but also pushes the function so that it
4130 will be found by normal lookup. */
4133 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4135 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4140 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4144 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4148 push_void_library_fn (tree name
, tree parmtypes
)
4150 tree type
= build_function_type (void_type_node
, parmtypes
);
4151 return push_library_fn (name
, type
, NULL_TREE
);
4154 /* Like push_library_fn, but also note that this function throws
4155 and does not return. Used for __throw_foo and the like. */
4158 push_throw_library_fn (tree name
, tree type
)
4160 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4161 TREE_THIS_VOLATILE (fn
) = 1;
4162 TREE_NOTHROW (fn
) = 0;
4166 /* When we call finish_struct for an anonymous union, we create
4167 default copy constructors and such. But, an anonymous union
4168 shouldn't have such things; this function undoes the damage to the
4169 anonymous union type T.
4171 (The reason that we create the synthesized methods is that we don't
4172 distinguish `union { int i; }' from `typedef union { int i; } U'.
4173 The first is an anonymous union; the second is just an ordinary
4177 fixup_anonymous_aggr (tree t
)
4181 /* Wipe out memory of synthesized methods. */
4182 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4183 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4184 TYPE_HAS_COPY_CTOR (t
) = 0;
4185 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4186 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4187 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4189 /* Splice the implicitly generated functions out of the TYPE_METHODS
4191 q
= &TYPE_METHODS (t
);
4194 if (DECL_ARTIFICIAL (*q
))
4195 *q
= TREE_CHAIN (*q
);
4197 q
= &DECL_CHAIN (*q
);
4200 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4201 if (TYPE_METHODS (t
))
4203 tree decl
= TYPE_MAIN_DECL (t
);
4205 if (TREE_CODE (t
) != UNION_TYPE
)
4206 error_at (DECL_SOURCE_LOCATION (decl
),
4207 "an anonymous struct cannot have function members");
4209 error_at (DECL_SOURCE_LOCATION (decl
),
4210 "an anonymous union cannot have function members");
4213 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4214 assignment operators (because they cannot have these methods themselves).
4215 For anonymous unions this is already checked because they are not allowed
4216 in any union, otherwise we have to check it. */
4217 if (TREE_CODE (t
) != UNION_TYPE
)
4221 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4222 if (TREE_CODE (field
) == FIELD_DECL
)
4224 type
= TREE_TYPE (field
);
4225 if (CLASS_TYPE_P (type
))
4227 if (TYPE_NEEDS_CONSTRUCTING (type
))
4228 error ("member %q+#D with constructor not allowed "
4229 "in anonymous aggregate", field
);
4230 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4231 error ("member %q+#D with destructor not allowed "
4232 "in anonymous aggregate", field
);
4233 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4234 error ("member %q+#D with copy assignment operator "
4235 "not allowed in anonymous aggregate", field
);
4241 /* Warn for an attribute located at LOCATION that appertains to the
4242 class type CLASS_TYPE that has not been properly placed after its
4243 class-key, in it class-specifier. */
4246 warn_misplaced_attr_for_class_type (source_location location
,
4249 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4251 warning_at (location
, OPT_Wattributes
,
4252 "attribute ignored in declaration "
4253 "of %q#T", class_type
);
4255 "attribute for %q#T must follow the %qs keyword",
4256 class_type
, class_key_or_enum_as_string (class_type
));
4259 /* Make sure that a declaration with no declarator is well-formed, i.e.
4260 just declares a tagged type or anonymous union.
4262 Returns the type declared; or NULL_TREE if none. */
4265 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4266 bool explicit_type_instantiation_p
)
4268 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4269 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4270 /* If a class, struct, or enum type is declared by the DECLSPECS
4271 (i.e, if a class-specifier, enum-specifier, or non-typename
4272 elaborated-type-specifier appears in the DECLSPECS),
4273 DECLARED_TYPE is set to the corresponding type. */
4274 tree declared_type
= NULL_TREE
;
4275 bool error_p
= false;
4277 if (declspecs
->multiple_types_p
)
4278 error ("multiple types in one declaration");
4279 else if (declspecs
->redefined_builtin_type
)
4281 if (!in_system_header
)
4282 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4283 "redeclaration of C++ built-in type %qT",
4284 declspecs
->redefined_builtin_type
);
4289 && TYPE_P (declspecs
->type
)
4290 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4291 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4292 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4293 declared_type
= declspecs
->type
;
4294 else if (declspecs
->type
== error_mark_node
)
4296 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4297 permerror (input_location
, "declaration does not declare anything");
4298 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4300 error ("%<auto%> can only be specified for variables "
4301 "or function declarations");
4302 return error_mark_node
;
4304 /* Check for an anonymous union. */
4305 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4306 && TYPE_ANONYMOUS_P (declared_type
))
4308 /* 7/3 In a simple-declaration, the optional init-declarator-list
4309 can be omitted only when declaring a class (clause 9) or
4310 enumeration (7.2), that is, when the decl-specifier-seq contains
4311 either a class-specifier, an elaborated-type-specifier with
4312 a class-key (9.1), or an enum-specifier. In these cases and
4313 whenever a class-specifier or enum-specifier is present in the
4314 decl-specifier-seq, the identifiers in these specifiers are among
4315 the names being declared by the declaration (as class-name,
4316 enum-names, or enumerators, depending on the syntax). In such
4317 cases, and except for the declaration of an unnamed bit-field (9.6),
4318 the decl-specifier-seq shall introduce one or more names into the
4319 program, or shall redeclare a name introduced by a previous
4320 declaration. [Example:
4321 enum { }; // ill-formed
4322 typedef class { }; // ill-formed
4326 error ("missing type-name in typedef-declaration");
4329 /* Anonymous unions are objects, so they can have specifiers. */;
4330 SET_ANON_AGGR_TYPE_P (declared_type
);
4332 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4333 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4338 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4339 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4340 error ("%qs can only be specified for functions",
4341 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4342 ? "inline" : "virtual");
4344 && (!current_class_type
4345 || current_scope () != current_class_type
))
4346 error ("%<friend%> can only be specified inside a class");
4347 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4348 error ("%<explicit%> can only be specified for constructors");
4349 else if (declspecs
->storage_class
)
4350 error ("a storage class can only be specified for objects "
4352 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4353 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4354 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4355 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4356 error ("qualifiers can only be specified for objects "
4358 else if (saw_typedef
)
4359 warning (0, "%<typedef%> was ignored in this declaration");
4360 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4361 error ("%<constexpr%> cannot be used for type declarations");
4364 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4367 if (!CLASS_TYPE_P (declared_type
)
4368 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4369 /* For a non-template class, use the name location. */
4370 loc
= location_of (declared_type
);
4372 /* For a template class (an explicit instantiation), use the
4373 current location. */
4374 loc
= input_location
;
4376 if (explicit_type_instantiation_p
)
4377 /* [dcl.attr.grammar]/4:
4379 No attribute-specifier-seq shall appertain to an explicit
4382 warning_at (loc
, OPT_Wattributes
,
4383 "attribute ignored in explicit instantiation %q#T",
4386 "no attribute can be applied to "
4387 "an explicit instantiation");
4390 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4393 return declared_type
;
4396 /* Called when a declaration is seen that contains no names to declare.
4397 If its type is a reference to a structure, union or enum inherited
4398 from a containing scope, shadow that tag name for the current scope
4399 with a forward reference.
4400 If its type defines a new named structure or union
4401 or defines an enum, it is valid but we need not do anything here.
4402 Otherwise, it is an error.
4404 C++: may have to grok the declspecs to learn about static,
4405 complain for anonymous unions.
4407 Returns the TYPE declared -- or NULL_TREE if none. */
4410 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4412 tree t
= check_tag_decl (declspecs
,
4413 /*explicit_type_instantiation_p=*/false);
4418 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4421 /* This is where the variables in an anonymous union are
4422 declared. An anonymous union declaration looks like:
4424 because there is no declarator after the union, the parser
4425 sends that declaration here. */
4426 if (ANON_AGGR_TYPE_P (t
))
4428 fixup_anonymous_aggr (t
);
4430 if (TYPE_FIELDS (t
))
4432 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4433 declspecs
, NORMAL
, 0, NULL
);
4434 finish_anon_union (decl
);
4441 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4444 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4445 const cp_declarator
*declarator
,
4446 bool is_template_arg
)
4450 enum decl_context context
4451 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4452 attrs
= type_specifiers
->attributes
;
4453 type_specifiers
->attributes
= NULL_TREE
;
4454 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4455 if (attrs
&& type
!= error_mark_node
)
4457 if (CLASS_TYPE_P (type
))
4458 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4459 "outside of definition", type
);
4460 else if (MAYBE_CLASS_TYPE_P (type
))
4461 /* A template type parameter or other dependent type. */
4462 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4463 "type %qT without an associated declaration", type
);
4465 cplus_decl_attributes (&type
, attrs
, 0);
4470 /* Process a DECLARATOR for a function-scope variable declaration,
4471 namespace-scope variable declaration, or function declaration.
4472 (Function definitions go through start_function; class member
4473 declarations appearing in the body of the class go through
4474 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4475 If an error occurs, the error_mark_node is returned instead.
4477 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4478 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4479 for an explicitly defaulted function, or SD_DELETED for an explicitly
4480 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4481 implicitly initialized via a default constructor. ATTRIBUTES and
4482 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4484 The scope represented by the context of the returned DECL is pushed
4485 (if it is not the global namespace) and is assigned to
4486 *PUSHED_SCOPE_P. The caller is then responsible for calling
4487 pop_scope on *PUSHED_SCOPE_P if it is set. */
4490 start_decl (const cp_declarator
*declarator
,
4491 cp_decl_specifier_seq
*declspecs
,
4494 tree prefix_attributes
,
4495 tree
*pushed_scope_p
)
4503 *pushed_scope_p
= NULL_TREE
;
4505 /* An object declared as __attribute__((deprecated)) suppresses
4506 warnings of uses of other deprecated items. */
4507 if (lookup_attribute ("deprecated", attributes
))
4508 deprecated_state
= DEPRECATED_SUPPRESS
;
4510 attributes
= chainon (attributes
, prefix_attributes
);
4512 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4515 deprecated_state
= DEPRECATED_NORMAL
;
4517 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4518 || decl
== error_mark_node
)
4519 return error_mark_node
;
4521 context
= CP_DECL_CONTEXT (decl
);
4522 if (context
!= global_namespace
)
4523 *pushed_scope_p
= push_scope (context
);
4526 /* Is it valid for this decl to have an initializer at all?
4527 If not, set INITIALIZED to zero, which will indirectly
4528 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4529 switch (TREE_CODE (decl
))
4532 error ("typedef %qD is initialized (use decltype instead)", decl
);
4533 return error_mark_node
;
4536 if (initialized
== SD_DELETED
)
4537 /* We'll handle the rest of the semantics later, but we need to
4538 set this now so it's visible to duplicate_decls. */
4539 DECL_DELETED_FN (decl
) = 1;
4548 if (! toplevel_bindings_p ()
4549 && DECL_EXTERNAL (decl
))
4550 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4552 DECL_EXTERNAL (decl
) = 0;
4553 if (toplevel_bindings_p ())
4554 TREE_STATIC (decl
) = 1;
4556 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4558 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4559 record_key_method_defined (decl
);
4561 /* If this is a typedef that names the class for linkage purposes
4562 (7.1.3p8), apply any attributes directly to the type. */
4563 if (TREE_CODE (decl
) == TYPE_DECL
4564 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4565 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4566 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4570 /* Set attributes here so if duplicate decl, will have proper attributes. */
4571 cplus_decl_attributes (&decl
, attributes
, flags
);
4573 /* Dllimported symbols cannot be defined. Static data members (which
4574 can be initialized in-class and dllimported) go through grokfield,
4575 not here, so we don't need to exclude those decls when checking for
4577 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4579 error ("definition of %q#D is marked %<dllimport%>", decl
);
4580 DECL_DLLIMPORT_P (decl
) = 0;
4583 /* If #pragma weak was used, mark the decl weak now. */
4584 if (!processing_template_decl
)
4585 maybe_apply_pragma_weak (decl
);
4587 if (TREE_CODE (decl
) == FUNCTION_DECL
4588 && DECL_DECLARED_INLINE_P (decl
)
4589 && DECL_UNINLINABLE (decl
)
4590 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4591 warning (0, "inline function %q+D given attribute noinline", decl
);
4593 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4597 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4598 if (field
== NULL_TREE
|| !VAR_P (field
))
4599 error ("%q#D is not a static member of %q#T", decl
, context
);
4602 if (DECL_CONTEXT (field
) != context
)
4604 if (!same_type_p (DECL_CONTEXT (field
), context
))
4605 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4606 "to be defined as %<%T::%D%>",
4607 DECL_CONTEXT (field
), DECL_NAME (decl
),
4608 context
, DECL_NAME (decl
));
4609 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4611 /* Static data member are tricky; an in-class initialization
4612 still doesn't provide a definition, so the in-class
4613 declaration will have DECL_EXTERNAL set, but will have an
4614 initialization. Thus, duplicate_decls won't warn
4615 about this situation, and so we check here. */
4616 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4617 error ("duplicate initialization of %qD", decl
);
4618 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4620 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4621 && !DECL_DECLARED_CONSTEXPR_P (field
))
4622 error ("%qD declared %<constexpr%> outside its class", field
);
4627 tree field
= check_classfn (context
, decl
,
4628 (processing_template_decl
4629 > template_class_depth (context
))
4630 ? current_template_parms
4632 if (field
&& field
!= error_mark_node
4633 && duplicate_decls (decl
, field
,
4634 /*newdecl_is_friend=*/false))
4638 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4639 DECL_IN_AGGR_P (decl
) = 0;
4640 /* Do not mark DECL as an explicit specialization if it was not
4641 already marked as an instantiation; a declaration should
4642 never be marked as a specialization unless we know what
4643 template is being specialized. */
4644 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4646 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4648 /* [temp.expl.spec] An explicit specialization of a static data
4649 member of a template is a definition if the declaration
4650 includes an initializer; otherwise, it is a declaration.
4652 We check for processing_specialization so this only applies
4653 to the new specialization syntax. */
4654 if (!initialized
&& processing_specialization
)
4655 DECL_EXTERNAL (decl
) = 1;
4658 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4659 /* Aliases are definitions. */
4661 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4665 was_public
= TREE_PUBLIC (decl
);
4667 /* Enter this declaration into the symbol table. */
4668 decl
= maybe_push_decl (decl
);
4670 if (processing_template_decl
)
4671 decl
= push_template_decl (decl
);
4672 if (decl
== error_mark_node
)
4673 return error_mark_node
;
4676 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4677 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4679 /* This is a const variable with implicit 'static'. Set
4680 DECL_THIS_STATIC so we can tell it from variables that are
4681 !TREE_PUBLIC because of the anonymous namespace. */
4682 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4683 DECL_THIS_STATIC (decl
) = 1;
4686 if (!processing_template_decl
&& VAR_P (decl
))
4687 start_decl_1 (decl
, initialized
);
4692 /* Process the declaration of a variable DECL. INITIALIZED is true
4693 iff DECL is explicitly initialized. (INITIALIZED is false if the
4694 variable is initialized via an implicitly-called constructor.)
4695 This function must be called for ordinary variables (including, for
4696 example, implicit instantiations of templates), but must not be
4697 called for template declarations. */
4700 start_decl_1 (tree decl
, bool initialized
)
4704 bool aggregate_definition_p
;
4706 gcc_assert (!processing_template_decl
);
4708 if (error_operand_p (decl
))
4711 gcc_assert (VAR_P (decl
));
4713 type
= TREE_TYPE (decl
);
4714 complete_p
= COMPLETE_TYPE_P (type
);
4715 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4717 /* If an explicit initializer is present, or if this is a definition
4718 of an aggregate, then we need a complete type at this point.
4719 (Scalars are always complete types, so there is nothing to
4720 check.) This code just sets COMPLETE_P; errors (if necessary)
4721 are issued below. */
4722 if ((initialized
|| aggregate_definition_p
)
4724 && COMPLETE_TYPE_P (complete_type (type
)))
4727 /* We will not yet have set TREE_READONLY on DECL if the type
4728 was "const", but incomplete, before this point. But, now, we
4729 have a complete type, so we can try again. */
4730 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4734 /* Is it valid for this decl to have an initializer at all? */
4736 /* Don't allow initializations for incomplete types except for
4737 arrays which might be completed by the initialization. */
4739 ; /* A complete type is ok. */
4740 else if (type_uses_auto (type
))
4741 ; /* An auto type is ok. */
4742 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4744 error ("variable %q#D has initializer but incomplete type", decl
);
4745 type
= TREE_TYPE (decl
) = error_mark_node
;
4747 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4749 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4750 error ("elements of array %q#D have incomplete type", decl
);
4751 /* else we already gave an error in start_decl. */
4754 else if (aggregate_definition_p
&& !complete_p
)
4756 if (type_uses_auto (type
))
4757 error ("declaration of %q#D has no initializer", decl
);
4759 error ("aggregate %q#D has incomplete type and cannot be defined",
4761 /* Change the type so that assemble_variable will give
4762 DECL an rtl we can live with: (mem (const_int 0)). */
4763 type
= TREE_TYPE (decl
) = error_mark_node
;
4766 /* Create a new scope to hold this declaration if necessary.
4767 Whether or not a new scope is necessary cannot be determined
4768 until after the type has been completed; if the type is a
4769 specialization of a class template it is not until after
4770 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4771 will be set correctly. */
4772 maybe_push_cleanup_level (type
);
4775 /* Handle initialization of references. DECL, TYPE, and INIT have the
4776 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4777 but will be set to a new CLEANUP_STMT if a temporary is created
4778 that must be destroyed subsequently.
4780 Returns an initializer expression to use to initialize DECL, or
4781 NULL if the initialization can be performed statically.
4783 Quotes on semantics can be found in ARM 8.4.3. */
4786 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4788 if (init
== NULL_TREE
)
4790 if ((DECL_LANG_SPECIFIC (decl
) == 0
4791 || DECL_IN_AGGR_P (decl
) == 0)
4792 && ! DECL_THIS_EXTERN (decl
))
4793 error ("%qD declared as reference but not initialized", decl
);
4797 if (TREE_CODE (init
) == TREE_LIST
)
4798 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4799 tf_warning_or_error
);
4801 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4802 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4803 /* Note: default conversion is only called in very special cases. */
4804 init
= decay_conversion (init
, tf_warning_or_error
);
4806 /* Convert INIT to the reference type TYPE. This may involve the
4807 creation of a temporary, whose lifetime must be the same as that
4808 of the reference. If so, a DECL_EXPR for the temporary will be
4809 added just after the DECL_EXPR for DECL. That's why we don't set
4810 DECL_INITIAL for local references (instead assigning to them
4811 explicitly); we need to allow the temporary to be initialized
4813 return initialize_reference (type
, init
, flags
,
4814 tf_warning_or_error
);
4817 /* Designated initializers in arrays are not supported in GNU C++.
4818 The parser cannot detect this error since it does not know whether
4819 a given brace-enclosed initializer is for a class type or for an
4820 array. This function checks that CE does not use a designated
4821 initializer. If it does, an error is issued. Returns true if CE
4822 is valid, i.e., does not have a designated initializer. */
4825 check_array_designated_initializer (constructor_elt
*ce
,
4826 unsigned HOST_WIDE_INT index
)
4828 /* Designated initializers for array elements are not supported. */
4831 /* The parser only allows identifiers as designated
4833 if (ce
->index
== error_mark_node
)
4835 error ("name used in a GNU-style designated "
4836 "initializer for an array");
4839 else if (identifier_p (ce
->index
))
4841 error ("name %qD used in a GNU-style designated "
4842 "initializer for an array", ce
->index
);
4846 ce
->index
= cxx_constant_value (ce
->index
);
4848 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4850 /* A C99 designator is OK if it matches the current index. */
4851 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4854 sorry ("non-trivial designated initializers not supported");
4865 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4866 array until we finish parsing the initializer. If that's the
4867 situation we're in, update DECL accordingly. */
4870 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4872 tree type
= TREE_TYPE (decl
);
4874 if (TREE_CODE (type
) == ARRAY_TYPE
4875 && TYPE_DOMAIN (type
) == NULL_TREE
4876 && TREE_CODE (decl
) != TYPE_DECL
)
4878 /* do_default is really a C-ism to deal with tentative definitions.
4879 But let's leave it here to ease the eventual merge. */
4880 int do_default
= !DECL_EXTERNAL (decl
);
4881 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4884 /* Check that there are no designated initializers in INIT, as
4885 those are not supported in GNU C++, and as the middle-end
4886 will crash if presented with a non-numeric designated
4888 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4890 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4891 constructor_elt
*ce
;
4893 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4894 if (!check_array_designated_initializer (ce
, i
))
4900 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4904 error ("initializer fails to determine size of %qD", decl
);
4906 else if (failure
== 2)
4910 error ("array size missing in %qD", decl
);
4912 /* If a `static' var's size isn't known, make it extern as
4913 well as static, so it does not get allocated. If it's not
4914 `static', then don't mark it extern; finish_incomplete_decl
4915 will give it a default size and it will get allocated. */
4916 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4917 DECL_EXTERNAL (decl
) = 1;
4919 else if (failure
== 3)
4921 error ("zero-size array %qD", decl
);
4925 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4927 relayout_decl (decl
);
4931 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4932 any appropriate error messages regarding the layout. */
4935 layout_var_decl (tree decl
)
4939 type
= TREE_TYPE (decl
);
4940 if (type
== error_mark_node
)
4943 /* If we haven't already layed out this declaration, do so now.
4944 Note that we must not call complete type for an external object
4945 because it's type might involve templates that we are not
4946 supposed to instantiate yet. (And it's perfectly valid to say
4947 `extern X x' for some incomplete type `X'.) */
4948 if (!DECL_EXTERNAL (decl
))
4949 complete_type (type
);
4950 if (!DECL_SIZE (decl
)
4951 && TREE_TYPE (decl
) != error_mark_node
4952 && (COMPLETE_TYPE_P (type
)
4953 || (TREE_CODE (type
) == ARRAY_TYPE
4954 && !TYPE_DOMAIN (type
)
4955 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4956 layout_decl (decl
, 0);
4958 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4960 /* An automatic variable with an incomplete type: that is an error.
4961 Don't talk about array types here, since we took care of that
4962 message in grokdeclarator. */
4963 error ("storage size of %qD isn%'t known", decl
);
4964 TREE_TYPE (decl
) = error_mark_node
;
4967 /* Keep this code around in case we later want to control debug info
4968 based on whether a type is "used". (jason 1999-11-11) */
4970 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4971 /* Let debugger know it should output info for this type. */
4972 note_debug_info_needed (ttype
);
4974 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4975 note_debug_info_needed (DECL_CONTEXT (decl
));
4978 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4979 && DECL_SIZE (decl
) != NULL_TREE
4980 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4982 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4983 constant_expression_warning (DECL_SIZE (decl
));
4986 error ("storage size of %qD isn%'t constant", decl
);
4987 TREE_TYPE (decl
) = error_mark_node
;
4992 /* If a local static variable is declared in an inline function, or if
4993 we have a weak definition, we must endeavor to create only one
4994 instance of the variable at link-time. */
4997 maybe_commonize_var (tree decl
)
4999 /* Static data in a function with comdat linkage also has comdat
5001 if (TREE_STATIC (decl
)
5002 /* Don't mess with __FUNCTION__. */
5003 && ! DECL_ARTIFICIAL (decl
)
5004 && DECL_FUNCTION_SCOPE_P (decl
)
5005 && vague_linkage_p (DECL_CONTEXT (decl
)))
5009 /* With weak symbols, we simply make the variable COMDAT;
5010 that will cause copies in multiple translations units to
5012 comdat_linkage (decl
);
5016 if (DECL_INITIAL (decl
) == NULL_TREE
5017 || DECL_INITIAL (decl
) == error_mark_node
)
5019 /* Without weak symbols, we can use COMMON to merge
5020 uninitialized variables. */
5021 TREE_PUBLIC (decl
) = 1;
5022 DECL_COMMON (decl
) = 1;
5026 /* While for initialized variables, we must use internal
5027 linkage -- which means that multiple copies will not
5029 TREE_PUBLIC (decl
) = 0;
5030 DECL_COMMON (decl
) = 0;
5031 warning_at (input_location
, 0,
5032 "sorry: semantics of inline function static "
5033 "data %q+#D are wrong (you%'ll wind up "
5034 "with multiple copies)", decl
);
5035 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5036 " you can work around this by removing "
5041 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
5042 /* Set it up again; we might have set DECL_INITIAL since the last
5044 comdat_linkage (decl
);
5047 /* Issue an error message if DECL is an uninitialized const variable. */
5050 check_for_uninitialized_const_var (tree decl
)
5052 tree type
= strip_array_types (TREE_TYPE (decl
));
5054 /* ``Unless explicitly declared extern, a const object does not have
5055 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5058 && TREE_CODE (type
) != REFERENCE_TYPE
5059 && CP_TYPE_CONST_P (type
)
5060 && !DECL_INITIAL (decl
))
5062 tree field
= default_init_uninitialized_part (type
);
5066 permerror (DECL_SOURCE_LOCATION (decl
),
5067 "uninitialized const %qD", decl
);
5069 if (CLASS_TYPE_P (type
))
5071 tree defaulted_ctor
;
5073 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5074 "%q#T has no user-provided default constructor", type
);
5075 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5077 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5078 "constructor is not user-provided because it is "
5079 "explicitly defaulted in the class body");
5080 inform (0, "and the implicitly-defined constructor does not "
5081 "initialize %q+#D", field
);
5086 /* Structure holding the current initializer being processed by reshape_init.
5087 CUR is a pointer to the current element being processed, END is a pointer
5088 after the last element present in the initializer. */
5089 typedef struct reshape_iterator_t
5091 constructor_elt
*cur
;
5092 constructor_elt
*end
;
5095 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5097 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5098 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5099 initialized. If there are no more such fields, the return value
5103 next_initializable_field (tree field
)
5106 && (TREE_CODE (field
) != FIELD_DECL
5107 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5108 || DECL_ARTIFICIAL (field
)))
5109 field
= DECL_CHAIN (field
);
5114 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5115 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5116 INTEGER_CST representing the size of the array minus one (the maximum index),
5117 or NULL_TREE if the array was declared without specifying the size. D is
5118 the iterator within the constructor. */
5121 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5122 tsubst_flags_t complain
)
5125 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5126 unsigned HOST_WIDE_INT max_index_cst
= 0;
5127 unsigned HOST_WIDE_INT index
;
5129 /* The initializer for an array is always a CONSTRUCTOR. */
5130 new_init
= build_constructor (init_list_type_node
, NULL
);
5134 /* Minus 1 is used for zero sized arrays. */
5135 if (integer_all_onesp (max_index
))
5138 if (host_integerp (max_index
, 1))
5139 max_index_cst
= tree_low_cst (max_index
, 1);
5140 /* sizetype is sign extended, not zero extended. */
5142 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5146 /* Loop until there are no more initializers. */
5148 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5152 constructor_elt
*old_cur
= d
->cur
;
5154 check_array_designated_initializer (d
->cur
, index
);
5155 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5157 if (elt_init
== error_mark_node
)
5158 return error_mark_node
;
5159 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5160 size_int (index
), elt_init
);
5161 if (!TREE_CONSTANT (elt_init
))
5162 TREE_CONSTANT (new_init
) = false;
5164 /* This can happen with an invalid initializer (c++/54501). */
5165 if (d
->cur
== old_cur
&& !sized_array_p
)
5172 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5173 Parameters are the same of reshape_init_r. */
5176 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5178 tree max_index
= NULL_TREE
;
5180 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5182 if (TYPE_DOMAIN (type
))
5183 max_index
= array_type_nelts (type
);
5185 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5188 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5189 Parameters are the same of reshape_init_r. */
5192 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5194 tree max_index
= NULL_TREE
;
5196 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5198 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5200 tree value
= d
->cur
->value
;
5201 if (!same_type_p (TREE_TYPE (value
), type
))
5203 if (complain
& tf_error
)
5204 error ("invalid type %qT as initializer for a vector of type %qT",
5205 TREE_TYPE (d
->cur
->value
), type
);
5206 value
= error_mark_node
;
5212 /* For a vector, we initialize it as an array of the appropriate size. */
5213 if (TREE_CODE (type
) == VECTOR_TYPE
)
5214 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5216 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5219 /* Subroutine of reshape_init_r, processes the initializers for classes
5220 or union. Parameters are the same of reshape_init_r. */
5223 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5224 tsubst_flags_t complain
)
5229 gcc_assert (CLASS_TYPE_P (type
));
5231 /* The initializer for a class is always a CONSTRUCTOR. */
5232 new_init
= build_constructor (init_list_type_node
, NULL
);
5233 field
= next_initializable_field (TYPE_FIELDS (type
));
5239 An initializer for an aggregate member that is an
5240 empty class shall have the form of an empty
5241 initializer-list {}. */
5242 if (!first_initializer_p
)
5244 if (complain
& tf_error
)
5245 error ("initializer for %qT must be brace-enclosed", type
);
5246 return error_mark_node
;
5251 /* Loop through the initializable fields, gathering initializers. */
5252 while (d
->cur
!= d
->end
)
5255 constructor_elt
*old_cur
= d
->cur
;
5257 /* Handle designated initializers, as an extension. */
5260 if (d
->cur
->index
== error_mark_node
)
5261 return error_mark_node
;
5263 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5265 if (complain
& tf_error
)
5266 error ("%<[%E] =%> used in a GNU-style designated initializer"
5267 " for class %qT", d
->cur
->index
, type
);
5268 return error_mark_node
;
5271 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5272 /* We already reshaped this. */
5273 gcc_assert (d
->cur
->index
== field
);
5275 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5277 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5279 if (complain
& tf_error
)
5280 error ("%qT has no non-static data member named %qD", type
,
5282 return error_mark_node
;
5286 /* If we processed all the member of the class, we are done. */
5290 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5291 /*first_initializer_p=*/false, complain
);
5292 if (field_init
== error_mark_node
)
5293 return error_mark_node
;
5295 if (d
->cur
== old_cur
&& d
->cur
->index
)
5297 /* This can happen with an invalid initializer for a flexible
5298 array member (c++/54441). */
5299 if (complain
& tf_error
)
5300 error ("invalid initializer for %q#D", field
);
5301 return error_mark_node
;
5304 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5308 When a union is initialized with a brace-enclosed
5309 initializer, the braces shall only contain an
5310 initializer for the first member of the union. */
5311 if (TREE_CODE (type
) == UNION_TYPE
)
5314 field
= next_initializable_field (DECL_CHAIN (field
));
5320 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5321 designators are not valid; either complain or return true to indicate
5322 that reshape_init_r should return error_mark_node. */
5325 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5329 if (complain
& tf_error
)
5330 error ("C99 designator %qE outside aggregate initializer",
5338 /* Subroutine of reshape_init, which processes a single initializer (part of
5339 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5340 iterator within the CONSTRUCTOR which points to the initializer to process.
5341 FIRST_INITIALIZER_P is true if this is the first initializer of the
5342 outermost CONSTRUCTOR node. */
5345 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5346 tsubst_flags_t complain
)
5348 tree init
= d
->cur
->value
;
5350 if (error_operand_p (init
))
5351 return error_mark_node
;
5353 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5354 && has_designator_problem (d
, complain
))
5355 return error_mark_node
;
5357 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5359 /* A complex type can be initialized from one or two initializers,
5360 but braces are not elided. */
5362 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5364 if (CONSTRUCTOR_NELTS (init
) > 2)
5366 if (complain
& tf_error
)
5367 error ("too many initializers for %qT", type
);
5369 return error_mark_node
;
5372 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5374 vec
<constructor_elt
, va_gc
> *v
= 0;
5375 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5376 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5377 if (has_designator_problem (d
, complain
))
5378 return error_mark_node
;
5380 init
= build_constructor (init_list_type_node
, v
);
5385 /* A non-aggregate type is always initialized with a single
5387 if (!CP_AGGREGATE_TYPE_P (type
))
5389 /* It is invalid to initialize a non-aggregate type with a
5390 brace-enclosed initializer before C++0x.
5391 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5392 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5393 a CONSTRUCTOR (with a record type). */
5394 if (TREE_CODE (init
) == CONSTRUCTOR
5395 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5397 if (SCALAR_TYPE_P (type
))
5399 if (complain
& tf_error
)
5400 error ("braces around scalar initializer for type %qT", type
);
5401 init
= error_mark_node
;
5404 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5413 All implicit type conversions (clause _conv_) are considered when
5414 initializing the aggregate member with an initializer from an
5415 initializer-list. If the initializer can initialize a member,
5416 the member is initialized. Otherwise, if the member is itself a
5417 non-empty subaggregate, brace elision is assumed and the
5418 initializer is considered for the initialization of the first
5419 member of the subaggregate. */
5420 if (TREE_CODE (init
) != CONSTRUCTOR
5421 /* But don't try this for the first initializer, since that would be
5422 looking through the outermost braces; A a2 = { a1 }; is not a
5423 valid aggregate initialization. */
5424 && !first_initializer_p
5425 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5426 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5433 /* [dcl.init.string]
5435 A char array (whether plain char, signed char, or unsigned char)
5436 can be initialized by a string-literal (optionally enclosed in
5437 braces); a wchar_t array can be initialized by a wide
5438 string-literal (optionally enclosed in braces). */
5439 if (TREE_CODE (type
) == ARRAY_TYPE
5440 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5442 tree str_init
= init
;
5444 /* Strip one level of braces if and only if they enclose a single
5445 element (as allowed by [dcl.init.string]). */
5446 if (!first_initializer_p
5447 && TREE_CODE (str_init
) == CONSTRUCTOR
5448 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5450 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5453 /* If it's a string literal, then it's the initializer for the array
5454 as a whole. Otherwise, continue with normal initialization for
5455 array types (one value per array element). */
5456 if (TREE_CODE (str_init
) == STRING_CST
)
5458 if (has_designator_problem (d
, complain
))
5459 return error_mark_node
;
5465 /* The following cases are about aggregates. If we are not within a full
5466 initializer already, and there is not a CONSTRUCTOR, it means that there
5467 is a missing set of braces (that is, we are processing the case for
5468 which reshape_init exists). */
5469 if (!first_initializer_p
)
5471 if (TREE_CODE (init
) == CONSTRUCTOR
)
5473 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5474 /* There is no need to reshape pointer-to-member function
5475 initializers, as they are always constructed correctly
5476 by the front end. */
5478 else if (COMPOUND_LITERAL_P (init
))
5479 /* For a nested compound literal, there is no need to reshape since
5480 brace elision is not allowed. Even if we decided to allow it,
5481 we should add a call to reshape_init in finish_compound_literal,
5482 before calling digest_init, so changing this code would still
5483 not be necessary. */
5484 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5488 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5489 return reshape_init (type
, init
, complain
);
5493 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5497 /* Dispatch to specialized routines. */
5498 if (CLASS_TYPE_P (type
))
5499 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5500 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5501 return reshape_init_array (type
, d
, complain
);
5502 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5503 return reshape_init_vector (type
, d
, complain
);
5508 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5509 brace-enclosed aggregate initializer.
5511 INIT is the CONSTRUCTOR containing the list of initializers describing
5512 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5513 It may not presently match the shape of the TYPE; for example:
5515 struct S { int a; int b; };
5516 struct S a[] = { 1, 2, 3, 4 };
5518 Here INIT will hold a vector of four elements, rather than a
5519 vector of two elements, each itself a vector of two elements. This
5520 routine transforms INIT from the former form into the latter. The
5521 revised CONSTRUCTOR node is returned. */
5524 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5526 vec
<constructor_elt
, va_gc
> *v
;
5530 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5532 v
= CONSTRUCTOR_ELTS (init
);
5534 /* An empty constructor does not need reshaping, and it is always a valid
5536 if (vec_safe_is_empty (v
))
5539 /* Recurse on this CONSTRUCTOR. */
5541 d
.end
= d
.cur
+ v
->length ();
5543 new_init
= reshape_init_r (type
, &d
, true, complain
);
5544 if (new_init
== error_mark_node
)
5545 return error_mark_node
;
5547 /* Make sure all the element of the constructor were used. Otherwise,
5548 issue an error about exceeding initializers. */
5551 if (complain
& tf_error
)
5552 error ("too many initializers for %qT", type
);
5554 return error_mark_node
;
5560 /* Verify array initializer. Returns true if errors have been reported. */
5563 check_array_initializer (tree decl
, tree type
, tree init
)
5565 tree element_type
= TREE_TYPE (type
);
5567 /* The array type itself need not be complete, because the
5568 initializer may tell us how many elements are in the array.
5569 But, the elements of the array must be complete. */
5570 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5573 error ("elements of array %q#D have incomplete type", decl
);
5575 error ("elements of array %q#T have incomplete type", type
);
5578 /* A compound literal can't have variable size. */
5580 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5581 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5583 error ("variable-sized compound literal");
5589 /* Subroutine of check_initializer; args are passed down from that function.
5590 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5593 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5596 gcc_assert (stmts_are_full_exprs_p ());
5597 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5600 /* Verify INIT (the initializer for DECL), and record the
5601 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5602 grok_reference_init.
5604 If the return value is non-NULL, it is an expression that must be
5605 evaluated dynamically to initialize DECL. */
5608 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5610 tree type
= TREE_TYPE (decl
);
5611 tree init_code
= NULL
;
5612 tree extra_init
= NULL_TREE
;
5615 /* Things that are going to be initialized need to have complete
5617 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5619 if (DECL_HAS_VALUE_EXPR_P (decl
))
5621 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5622 it doesn't have storage to be initialized. */
5623 gcc_assert (init
== NULL_TREE
);
5627 if (type
== error_mark_node
)
5628 /* We will have already complained. */
5631 if (TREE_CODE (type
) == ARRAY_TYPE
)
5633 if (check_array_initializer (decl
, type
, init
))
5636 else if (!COMPLETE_TYPE_P (type
))
5638 error ("%q#D has incomplete type", decl
);
5639 TREE_TYPE (decl
) = error_mark_node
;
5643 /* There is no way to make a variable-sized class type in GNU C++. */
5644 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5646 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5648 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5649 if (SCALAR_TYPE_P (type
))
5653 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5654 init
= build_zero_init (type
, NULL_TREE
, false);
5656 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5658 error ("scalar object %qD requires one element in initializer",
5660 TREE_TYPE (decl
) = error_mark_node
;
5666 if (TREE_CODE (decl
) == CONST_DECL
)
5668 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5670 DECL_INITIAL (decl
) = init
;
5672 gcc_assert (init
!= NULL_TREE
);
5675 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5677 else if (init
|| type_build_ctor_call (type
)
5678 || TREE_CODE (type
) == REFERENCE_TYPE
)
5680 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5682 init
= grok_reference_init (decl
, type
, init
, flags
);
5683 flags
|= LOOKUP_ALREADY_DIGESTED
;
5686 check_for_uninitialized_const_var (decl
);
5687 /* Do not reshape constructors of vectors (they don't need to be
5689 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5691 if (is_std_init_list (type
))
5693 init
= perform_implicit_conversion (type
, init
,
5694 tf_warning_or_error
);
5695 flags
|= LOOKUP_ALREADY_DIGESTED
;
5697 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5699 /* Don't reshape if the class has constructors. */
5700 if (cxx_dialect
== cxx98
)
5701 error ("in C++98 %qD must be initialized by constructor, "
5705 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5707 error ("opaque vector types cannot be initialized");
5708 init
= error_mark_node
;
5712 init
= reshape_init (type
, init
, tf_warning_or_error
);
5713 if (SCALAR_TYPE_P (type
))
5714 check_narrowing (type
, init
);
5718 /* If DECL has an array type without a specific bound, deduce the
5719 array size from the initializer. */
5720 maybe_deduce_size_from_array_init (decl
, init
);
5721 type
= TREE_TYPE (decl
);
5722 if (type
== error_mark_node
)
5725 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5726 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5727 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5728 && CP_AGGREGATE_TYPE_P (type
)
5729 && (CLASS_TYPE_P (type
)
5730 || type_has_extended_temps (type
))))
5732 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5734 /* A constructor call is a non-trivial initializer even if
5735 it isn't explicitly written. */
5736 if (TREE_SIDE_EFFECTS (init_code
))
5737 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5739 /* If this is a constexpr initializer, expand_default_init will
5740 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5741 case, pull the initializer back out and pass it down into
5742 store_init_value. */
5743 while (TREE_CODE (init_code
) == EXPR_STMT
5744 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5745 init_code
= TREE_OPERAND (init_code
, 0);
5746 if (TREE_CODE (init_code
) == INIT_EXPR
)
5748 init
= TREE_OPERAND (init_code
, 1);
5749 init_code
= NULL_TREE
;
5750 /* Don't call digest_init; it's unnecessary and will complain
5751 about aggregate initialization of non-aggregate classes. */
5752 flags
|= LOOKUP_ALREADY_DIGESTED
;
5754 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5756 /* Declared constexpr, but no suitable initializer; massage
5757 init appropriately so we can pass it into store_init_value
5759 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5760 init
= finish_compound_literal (type
, init
,
5761 tf_warning_or_error
);
5762 else if (CLASS_TYPE_P (type
)
5763 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5765 init
= build_functional_cast (type
, init
, tf_none
);
5766 if (TREE_CODE (init
) == TARGET_EXPR
)
5767 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5769 init_code
= NULL_TREE
;
5775 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5777 /* In aggregate initialization of a variable, each element
5778 initialization is a full-expression because there is no
5779 enclosing expression. */
5780 gcc_assert (stmts_are_full_exprs_p ());
5782 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5784 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5785 && DECL_INITIAL (decl
)
5786 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5787 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5788 warning (0, "array %qD initialized by parenthesized string literal %qE",
5789 decl
, DECL_INITIAL (decl
));
5795 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5796 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5797 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5798 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5801 check_for_uninitialized_const_var (decl
);
5804 if (init
&& init
!= error_mark_node
)
5805 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5808 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5810 if (init_code
&& DECL_IN_AGGR_P (decl
))
5812 static int explained
= 0;
5814 if (cxx_dialect
< cxx0x
)
5815 error ("initializer invalid for static member with constructor");
5817 error ("non-constant in-class initialization invalid for static "
5818 "member %qD", decl
);
5821 error ("(an out of class initialization is required)");
5829 /* If DECL is not a local variable, give it RTL. */
5832 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5834 int toplev
= toplevel_bindings_p ();
5836 const char *filename
;
5838 /* Set the DECL_ASSEMBLER_NAME for the object. */
5841 /* The `register' keyword, when used together with an
5842 asm-specification, indicates that the variable should be
5843 placed in a particular register. */
5844 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5846 set_user_assembler_name (decl
, asmspec
);
5847 DECL_HARD_REGISTER (decl
) = 1;
5851 if (TREE_CODE (decl
) == FUNCTION_DECL
5852 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5853 set_builtin_user_assembler_name (decl
, asmspec
);
5854 set_user_assembler_name (decl
, asmspec
);
5858 /* Handle non-variables up front. */
5861 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5865 /* If we see a class member here, it should be a static data
5867 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5869 gcc_assert (TREE_STATIC (decl
));
5870 /* An in-class declaration of a static data member should be
5871 external; it is only a declaration, and not a definition. */
5872 if (init
== NULL_TREE
)
5873 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5876 /* We don't create any RTL for local variables. */
5877 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5880 /* We defer emission of local statics until the corresponding
5881 DECL_EXPR is expanded. */
5882 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5884 /* We try to defer namespace-scope static constants so that they are
5885 not emitted into the object file unnecessarily. */
5886 filename
= input_filename
;
5887 if (!DECL_VIRTUAL_P (decl
)
5888 && TREE_READONLY (decl
)
5889 && DECL_INITIAL (decl
) != NULL_TREE
5890 && DECL_INITIAL (decl
) != error_mark_node
5892 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5894 && !TREE_PUBLIC (decl
))
5896 /* Fool with the linkage of static consts according to #pragma
5898 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5899 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5901 TREE_PUBLIC (decl
) = 1;
5902 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5907 /* Likewise for template instantiations. */
5908 else if (DECL_LANG_SPECIFIC (decl
)
5909 && DECL_IMPLICIT_INSTANTIATION (decl
))
5912 /* If we're not deferring, go ahead and assemble the variable. */
5914 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5917 /* walk_tree helper for wrap_temporary_cleanups, below. */
5920 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5922 /* Stop at types or full-expression boundaries. */
5923 if (TYPE_P (*stmt_p
)
5924 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5930 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5932 tree guard
= (tree
)data
;
5933 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5935 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5936 /* Tell honor_protect_cleanup_actions to handle this as a separate
5938 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5940 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5946 /* We're initializing a local variable which has a cleanup GUARD. If there
5947 are any temporaries used in the initializer INIT of this variable, we
5948 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5949 variable will be cleaned up properly if one of them throws.
5951 Unfortunately, there's no way to express this properly in terms of
5952 nesting, as the regions for the temporaries overlap the region for the
5953 variable itself; if there are two temporaries, the variable needs to be
5954 the first thing destroyed if either of them throws. However, we only
5955 want to run the variable's cleanup if it actually got constructed. So
5956 we need to guard the temporary cleanups with the variable's cleanup if
5957 they are run on the normal path, but not if they are run on the
5958 exceptional path. We implement this by telling
5959 honor_protect_cleanup_actions to strip the variable cleanup from the
5960 exceptional path. */
5963 wrap_temporary_cleanups (tree init
, tree guard
)
5965 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5968 /* Generate code to initialize DECL (a local variable). */
5971 initialize_local_var (tree decl
, tree init
)
5973 tree type
= TREE_TYPE (decl
);
5977 gcc_assert (VAR_P (decl
)
5978 || TREE_CODE (decl
) == RESULT_DECL
);
5979 gcc_assert (!TREE_STATIC (decl
));
5981 if (DECL_SIZE (decl
) == NULL_TREE
)
5983 /* If we used it already as memory, it must stay in memory. */
5984 DECL_INITIAL (decl
) = NULL_TREE
;
5985 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5989 if (type
== error_mark_node
)
5992 /* Compute and store the initial value. */
5993 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5994 if (TREE_USED (type
))
5995 DECL_READ_P (decl
) = 1;
5997 /* Generate a cleanup, if necessary. */
5998 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6000 /* Perform the initialization. */
6003 if (TREE_CODE (init
) == INIT_EXPR
6004 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
6006 /* Stick simple initializers in DECL_INITIAL so that
6007 -Wno-init-self works (c++/34772). */
6008 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6009 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
6013 int saved_stmts_are_full_exprs_p
;
6015 /* If we're only initializing a single object, guard the
6016 destructors of any temporaries used in its initializer with
6017 its destructor. This isn't right for arrays because each
6018 element initialization is a full-expression. */
6019 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6020 wrap_temporary_cleanups (init
, cleanup
);
6022 gcc_assert (building_stmt_list_p ());
6023 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6024 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6025 finish_expr_stmt (init
);
6026 current_stmt_tree ()->stmts_are_full_exprs_p
=
6027 saved_stmts_are_full_exprs_p
;
6031 /* Set this to 0 so we can tell whether an aggregate which was
6032 initialized was ever used. Don't do this if it has a
6033 destructor, so we don't complain about the 'resource
6034 allocation is initialization' idiom. Now set
6035 attribute((unused)) on types so decls of that type will be
6036 marked used. (see TREE_USED, above.) */
6037 if (TYPE_NEEDS_CONSTRUCTING (type
)
6039 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6040 && DECL_NAME (decl
))
6041 TREE_USED (decl
) = 0;
6042 else if (already_used
)
6043 TREE_USED (decl
) = 1;
6046 finish_decl_cleanup (decl
, cleanup
);
6049 /* DECL is a VAR_DECL for a compiler-generated variable with static
6050 storage duration (like a virtual table) whose initializer is a
6051 compile-time constant. Initialize the variable and provide it to the
6055 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6058 gcc_assert (DECL_ARTIFICIAL (decl
));
6059 init
= build_constructor (TREE_TYPE (decl
), v
);
6060 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6061 DECL_INITIAL (decl
) = init
;
6062 DECL_INITIALIZED_P (decl
) = 1;
6063 determine_visibility (decl
);
6064 layout_var_decl (decl
);
6065 maybe_commonize_var (decl
);
6066 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6069 /* INIT is the initializer for a variable, as represented by the
6070 parser. Returns true iff INIT is type-dependent. */
6073 type_dependent_init_p (tree init
)
6075 if (TREE_CODE (init
) == TREE_LIST
)
6076 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6077 return any_type_dependent_elements_p (init
);
6078 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6079 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6081 vec
<constructor_elt
, va_gc
> *elts
;
6085 elts
= CONSTRUCTOR_ELTS (init
);
6086 nelts
= vec_safe_length (elts
);
6087 for (i
= 0; i
< nelts
; ++i
)
6088 if (type_dependent_init_p ((*elts
)[i
].value
))
6092 /* It must be a simple expression, e.g., int i = 3; */
6093 return type_dependent_expression_p (init
);
6098 /* INIT is the initializer for a variable, as represented by the
6099 parser. Returns true iff INIT is value-dependent. */
6102 value_dependent_init_p (tree init
)
6104 if (TREE_CODE (init
) == TREE_LIST
)
6105 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6106 return any_value_dependent_elements_p (init
);
6107 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6108 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6110 vec
<constructor_elt
, va_gc
> *elts
;
6114 elts
= CONSTRUCTOR_ELTS (init
);
6115 nelts
= vec_safe_length (elts
);
6116 for (i
= 0; i
< nelts
; ++i
)
6117 if (value_dependent_init_p ((*elts
)[i
].value
))
6121 /* It must be a simple expression, e.g., int i = 3; */
6122 return value_dependent_expression_p (init
);
6127 /* Finish processing of a declaration;
6128 install its line number and initial value.
6129 If the length of an array type is not known before,
6130 it must be determined now, from the initial value, or it is an error.
6132 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6133 true, then INIT is an integral constant expression.
6135 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6136 if the (init) syntax was used. */
6139 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6140 tree asmspec_tree
, int flags
)
6143 vec
<tree
, va_gc
> *cleanups
= NULL
;
6144 const char *asmspec
= NULL
;
6145 int was_readonly
= 0;
6146 bool var_definition_p
= false;
6149 if (decl
== error_mark_node
)
6154 error ("assignment (not initialization) in declaration");
6158 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6159 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6160 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6162 type
= TREE_TYPE (decl
);
6163 if (type
== error_mark_node
)
6166 /* If a name was specified, get the string. */
6167 if (at_namespace_scope_p ())
6168 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6169 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6170 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6172 if (current_class_type
6173 && CP_DECL_CONTEXT (decl
) == current_class_type
6174 && TYPE_BEING_DEFINED (current_class_type
)
6175 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6176 && (DECL_INITIAL (decl
) || init
))
6177 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6179 if (TREE_CODE (decl
) != FUNCTION_DECL
6180 && (auto_node
= type_uses_auto (type
)))
6183 if (init
== NULL_TREE
)
6185 if (DECL_LANG_SPECIFIC (decl
)
6186 && DECL_TEMPLATE_INSTANTIATION (decl
)
6187 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6189 /* init is null because we're deferring instantiating the
6190 initializer until we need it. Well, we need it now. */
6191 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6195 error ("declaration of %q#D has no initializer", decl
);
6196 TREE_TYPE (decl
) = error_mark_node
;
6200 if (TREE_CODE (d_init
) == TREE_LIST
)
6201 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6202 tf_warning_or_error
);
6203 d_init
= resolve_nondeduced_context (d_init
);
6204 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6206 if (type
== error_mark_node
)
6208 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6211 if (!ensure_literal_type_for_constexpr_object (decl
))
6212 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6215 && DECL_CLASS_SCOPE_P (decl
)
6216 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6217 check_static_variable_definition (decl
, type
);
6219 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6222 if (init
== ridpointers
[(int)RID_DELETE
])
6224 /* FIXME check this is 1st decl. */
6225 DECL_DELETED_FN (decl
) = 1;
6226 DECL_DECLARED_INLINE_P (decl
) = 1;
6227 DECL_INITIAL (decl
) = error_mark_node
;
6228 FOR_EACH_CLONE (clone
, decl
)
6230 DECL_DELETED_FN (clone
) = 1;
6231 DECL_DECLARED_INLINE_P (clone
) = 1;
6232 DECL_INITIAL (clone
) = error_mark_node
;
6236 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6238 if (defaultable_fn_check (decl
))
6239 DECL_DEFAULTED_FN (decl
) = 1;
6241 DECL_INITIAL (decl
) = NULL_TREE
;
6245 if (init
&& VAR_P (decl
))
6247 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6248 /* If DECL is a reference, then we want to know whether init is a
6249 reference constant; init_const_expr_p as passed tells us whether
6250 it's an rvalue constant. */
6251 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6252 init_const_expr_p
= potential_constant_expression (init
);
6253 if (init_const_expr_p
)
6255 /* Set these flags now for templates. We'll update the flags in
6256 store_init_value for instantiations. */
6257 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6258 if (decl_maybe_constant_var_p (decl
))
6259 TREE_CONSTANT (decl
) = 1;
6263 if (processing_template_decl
)
6265 bool type_dependent_p
;
6267 /* Add this declaration to the statement-tree. */
6268 if (at_function_scope_p ())
6269 add_decl_expr (decl
);
6271 type_dependent_p
= dependent_type_p (type
);
6273 if (check_for_bare_parameter_packs (init
))
6276 DECL_INITIAL (decl
) = NULL_TREE
;
6279 /* Generally, initializers in templates are expanded when the
6280 template is instantiated. But, if DECL is a variable constant
6281 then it can be used in future constant expressions, so its value
6282 must be available. */
6284 if (!VAR_P (decl
) || dependent_type_p (type
))
6285 /* We can't do anything if the decl has dependent type. */;
6287 && init_const_expr_p
6288 && !type_dependent_p
6289 && decl_maybe_constant_var_p (decl
)
6290 && !type_dependent_init_p (init
)
6291 && !value_dependent_init_p (init
))
6293 /* This variable seems to be a non-dependent constant, so process
6294 its initializer. If check_initializer returns non-null the
6295 initialization wasn't constant after all. */
6297 cleanups
= make_tree_vector ();
6298 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6299 if (init_code
== NULL_TREE
)
6301 release_tree_vector (cleanups
);
6303 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6305 /* Deduce array size even if the initializer is dependent. */
6306 maybe_deduce_size_from_array_init (decl
, init
);
6307 /* And complain about multiple initializers. */
6308 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6309 && !MAYBE_CLASS_TYPE_P (type
))
6310 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6311 tf_warning_or_error
);
6315 DECL_INITIAL (decl
) = init
;
6319 /* Just store non-static data member initializers for later. */
6320 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6321 DECL_INITIAL (decl
) = init
;
6323 /* Take care of TYPE_DECLs up front. */
6324 if (TREE_CODE (decl
) == TYPE_DECL
)
6326 if (type
!= error_mark_node
6327 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6329 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6330 warning (0, "shadowing previous type declaration of %q#D", decl
);
6331 set_identifier_type_value (DECL_NAME (decl
), decl
);
6334 /* If we have installed this as the canonical typedef for this
6335 type, and that type has not been defined yet, delay emitting
6336 the debug information for it, as we will emit it later. */
6337 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6338 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6339 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6341 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6346 /* A reference will be modified here, as it is initialized. */
6347 if (! DECL_EXTERNAL (decl
)
6348 && TREE_READONLY (decl
)
6349 && TREE_CODE (type
) == REFERENCE_TYPE
)
6352 TREE_READONLY (decl
) = 0;
6357 /* If this is a local variable that will need a mangled name,
6358 register it now. We must do this before processing the
6359 initializer for the variable, since the initialization might
6360 require a guard variable, and since the mangled name of the
6361 guard variable will depend on the mangled name of this
6363 if (DECL_FUNCTION_SCOPE_P (decl
)
6364 && TREE_STATIC (decl
)
6365 && !DECL_ARTIFICIAL (decl
))
6367 push_local_name (decl
);
6368 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6369 || DECL_DESTRUCTOR_P (current_function_decl
))
6370 /* Normally local_decls is populated during GIMPLE lowering,
6371 but [cd]tors are never actually compiled directly. We need
6372 to put statics on the list so we can deal with the label
6373 address extension. FIXME. */
6374 add_local_decl (cfun
, decl
);
6377 /* Convert the initializer to the type of DECL, if we have not
6378 already initialized DECL. */
6379 if (!DECL_INITIALIZED_P (decl
)
6380 /* If !DECL_EXTERNAL then DECL is being defined. In the
6381 case of a static data member initialized inside the
6382 class-specifier, there can be an initializer even if DECL
6383 is *not* defined. */
6384 && (!DECL_EXTERNAL (decl
) || init
))
6386 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6389 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6390 /* Allow libjava/prims.cc define primitive classes. */
6391 if (init
!= NULL_TREE
6392 || jclass
== NULL_TREE
6393 || TREE_CODE (jclass
) != TYPE_DECL
6394 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6395 || !same_type_ignoring_top_level_qualifiers_p
6396 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6397 error ("Java object %qD not allocated with %<new%>", decl
);
6400 cleanups
= make_tree_vector ();
6401 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6403 /* Check that the initializer for a static data member was a
6404 constant. Although we check in the parser that the
6405 initializer is an integral constant expression, we do not
6406 simplify division-by-zero at the point at which it
6407 occurs. Therefore, in:
6409 struct S { static const int i = 7 / 0; };
6411 we issue an error at this point. It would
6412 probably be better to forbid division by zero in
6413 integral constant expressions. */
6414 if (DECL_EXTERNAL (decl
) && init
)
6416 error ("%qD cannot be initialized by a non-constant expression"
6417 " when being declared", decl
);
6418 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6426 The memory occupied by any object of static storage
6427 duration is zero-initialized at program startup before
6428 any other initialization takes place.
6430 We cannot create an appropriate initializer until after
6431 the type of DECL is finalized. If DECL_INITIAL is set,
6432 then the DECL is statically initialized, and any
6433 necessary zero-initialization has already been performed. */
6434 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6435 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6436 /*nelts=*/NULL_TREE
,
6437 /*static_storage_p=*/true);
6438 /* Remember that the initialization for this variable has
6440 DECL_INITIALIZED_P (decl
) = 1;
6441 /* This declaration is the definition of this variable,
6442 unless we are initializing a static data member within
6443 the class specifier. */
6444 if (!DECL_EXTERNAL (decl
))
6445 var_definition_p
= true;
6447 /* If the variable has an array type, lay out the type, even if
6448 there is no initializer. It is valid to index through the
6449 array, and we must get TYPE_ALIGN set correctly on the array
6451 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6454 if (TREE_STATIC (decl
)
6455 && !at_function_scope_p ()
6456 && current_function_decl
== NULL
)
6457 /* So decl is a global variable or a static member of a
6458 non local class. Record the types it uses
6459 so that we can decide later to emit debug info for them. */
6460 record_types_used_by_current_var_decl (decl
);
6462 else if (TREE_CODE (decl
) == FIELD_DECL
6463 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6464 error ("non-static data member %qD has Java class type", decl
);
6466 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
6468 /* If the VLA bound is larger than half the address space, or less
6469 than zero, throw std::bad_array_length. */
6470 tree max
= convert (ssizetype
, TYPE_MAX_VALUE (TYPE_DOMAIN (type
)));
6471 /* C++1y says we should throw for length <= 0, but we have
6472 historically supported zero-length arrays. Let's treat that as an
6473 extension to be disabled by -std=c++NN. */
6474 int lower
= flag_iso
? 0 : -1;
6475 tree comp
= build2 (LT_EXPR
, boolean_type_node
, max
, ssize_int (lower
));
6476 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
6477 throw_bad_array_length (), void_zero_node
);
6478 finish_expr_stmt (comp
);
6481 /* Add this declaration to the statement-tree. This needs to happen
6482 after the call to check_initializer so that the DECL_EXPR for a
6483 reference temp is added before the DECL_EXPR for the reference itself. */
6484 if (DECL_FUNCTION_SCOPE_P (decl
))
6485 add_decl_expr (decl
);
6487 /* Let the middle end know about variables and functions -- but not
6488 static data members in uninstantiated class templates. */
6489 if (VAR_OR_FUNCTION_DECL_P (decl
))
6493 layout_var_decl (decl
);
6494 maybe_commonize_var (decl
);
6497 /* This needs to happen after the linkage is set. */
6498 determine_visibility (decl
);
6500 if (var_definition_p
&& TREE_STATIC (decl
))
6502 /* If a TREE_READONLY variable needs initialization
6503 at runtime, it is no longer readonly and we need to
6504 avoid MEM_READONLY_P being set on RTL created for it. */
6507 if (TREE_READONLY (decl
))
6508 TREE_READONLY (decl
) = 0;
6511 else if (was_readonly
)
6512 TREE_READONLY (decl
) = 1;
6514 /* Likewise if it needs destruction. */
6515 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6516 TREE_READONLY (decl
) = 0;
6519 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6521 /* Check for abstractness of the type. Notice that there is no
6522 need to strip array types here since the check for those types
6523 is already done within create_array_type_for_decl. */
6524 abstract_virtuals_error (decl
, type
);
6526 if (TREE_TYPE (decl
) == error_mark_node
)
6527 /* No initialization required. */
6529 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6533 if (init
== ridpointers
[(int)RID_DEFAULT
])
6535 /* An out-of-class default definition is defined at
6536 the point where it is explicitly defaulted. */
6537 if (DECL_DELETED_FN (decl
))
6538 maybe_explain_implicit_delete (decl
);
6539 else if (DECL_INITIAL (decl
) == error_mark_node
)
6540 synthesize_method (decl
);
6543 error ("function %q#D is initialized like a variable", decl
);
6545 /* else no initialization required. */
6547 else if (DECL_EXTERNAL (decl
)
6548 && ! (DECL_LANG_SPECIFIC (decl
)
6549 && DECL_NOT_REALLY_EXTERN (decl
)))
6552 DECL_INITIAL (decl
) = init
;
6554 /* A variable definition. */
6555 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6556 /* Initialize the local variable. */
6557 initialize_local_var (decl
, init
);
6559 /* If a variable is defined, and then a subsequent
6560 definition with external linkage is encountered, we will
6561 get here twice for the same variable. We want to avoid
6562 calling expand_static_init more than once. For variables
6563 that are not static data members, we can call
6564 expand_static_init only when we actually process the
6565 initializer. It is not legal to redeclare a static data
6566 member, so this issue does not arise in that case. */
6567 else if (var_definition_p
&& TREE_STATIC (decl
))
6568 expand_static_init (decl
, init
);
6571 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6572 reference, insert it in the statement-tree now. */
6576 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6577 push_cleanup (decl
, t
, false);
6578 release_tree_vector (cleanups
);
6582 TREE_READONLY (decl
) = 1;
6584 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6587 /* Returns a declaration for a VAR_DECL as if:
6589 extern "C" TYPE NAME;
6591 had been seen. Used to create compiler-generated global
6595 declare_global_var (tree name
, tree type
)
6599 push_to_top_level ();
6600 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6601 TREE_PUBLIC (decl
) = 1;
6602 DECL_EXTERNAL (decl
) = 1;
6603 DECL_ARTIFICIAL (decl
) = 1;
6604 /* If the user has explicitly declared this variable (perhaps
6605 because the code we are compiling is part of a low-level runtime
6606 library), then it is possible that our declaration will be merged
6607 with theirs by pushdecl. */
6608 decl
= pushdecl (decl
);
6609 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6610 pop_from_top_level ();
6615 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6616 if "__cxa_atexit" is not being used) corresponding to the function
6617 to be called when the program exits. */
6620 get_atexit_fn_ptr_type (void)
6624 if (!atexit_fn_ptr_type_node
)
6627 if (flag_use_cxa_atexit
6628 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6629 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6630 arg_type
= ptr_type_node
;
6632 /* The parameter to "atexit" is "void (*)(void)". */
6633 arg_type
= NULL_TREE
;
6635 fn_type
= build_function_type_list (void_type_node
,
6636 arg_type
, NULL_TREE
);
6637 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6640 return atexit_fn_ptr_type_node
;
6643 /* Returns a pointer to the `atexit' function. Note that if
6644 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6645 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6648 get_atexit_node (void)
6654 bool use_aeabi_atexit
;
6659 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6661 /* The declaration for `__cxa_atexit' is:
6663 int __cxa_atexit (void (*)(void *), void *, void *)
6665 We build up the argument types and then the function type
6667 tree argtype0
, argtype1
, argtype2
;
6669 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6670 /* First, build the pointer-to-function type for the first
6672 fn_ptr_type
= get_atexit_fn_ptr_type ();
6673 /* Then, build the rest of the argument types. */
6674 argtype2
= ptr_type_node
;
6675 if (use_aeabi_atexit
)
6677 argtype1
= fn_ptr_type
;
6678 argtype0
= ptr_type_node
;
6682 argtype1
= ptr_type_node
;
6683 argtype0
= fn_ptr_type
;
6685 /* And the final __cxa_atexit type. */
6686 fn_type
= build_function_type_list (integer_type_node
,
6687 argtype0
, argtype1
, argtype2
,
6689 if (use_aeabi_atexit
)
6690 name
= "__aeabi_atexit";
6692 name
= "__cxa_atexit";
6696 /* The declaration for `atexit' is:
6698 int atexit (void (*)());
6700 We build up the argument types and then the function type
6702 fn_ptr_type
= get_atexit_fn_ptr_type ();
6703 /* Build the final atexit type. */
6704 fn_type
= build_function_type_list (integer_type_node
,
6705 fn_ptr_type
, NULL_TREE
);
6709 /* Now, build the function declaration. */
6710 push_lang_context (lang_name_c
);
6711 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6712 mark_used (atexit_fndecl
);
6713 pop_lang_context ();
6714 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6719 /* Like get_atexit_node, but for thread-local cleanups. */
6722 get_thread_atexit_node (void)
6724 /* The declaration for `__cxa_thread_atexit' is:
6726 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6727 tree fn_type
= build_function_type_list (integer_type_node
,
6728 get_atexit_fn_ptr_type (),
6729 ptr_type_node
, ptr_type_node
,
6732 /* Now, build the function declaration. */
6733 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
);
6734 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6737 /* Returns the __dso_handle VAR_DECL. */
6740 get_dso_handle_node (void)
6742 if (dso_handle_node
)
6743 return dso_handle_node
;
6745 /* Declare the variable. */
6746 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6749 #ifdef HAVE_GAS_HIDDEN
6750 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6751 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6754 return dso_handle_node
;
6757 /* Begin a new function with internal linkage whose job will be simply
6758 to destroy some particular variable. */
6760 static GTY(()) int start_cleanup_cnt
;
6763 start_cleanup_fn (void)
6768 bool use_cxa_atexit
= flag_use_cxa_atexit
6769 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6771 push_to_top_level ();
6773 /* No need to mangle this. */
6774 push_lang_context (lang_name_c
);
6776 /* Build the name of the function. */
6777 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6778 /* Build the function declaration. */
6779 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6780 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6781 /* It's a function with internal linkage, generated by the
6783 TREE_PUBLIC (fndecl
) = 0;
6784 DECL_ARTIFICIAL (fndecl
) = 1;
6785 /* Make the function `inline' so that it is only emitted if it is
6786 actually needed. It is unlikely that it will be inlined, since
6787 it is only called via a function pointer, but we avoid unnecessary
6788 emissions this way. */
6789 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6790 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6791 /* Build the parameter. */
6796 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6797 DECL_CONTEXT (parmdecl
) = fndecl
;
6798 TREE_USED (parmdecl
) = 1;
6799 DECL_READ_P (parmdecl
) = 1;
6800 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6804 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6806 pop_lang_context ();
6808 return current_function_decl
;
6811 /* Finish the cleanup function begun by start_cleanup_fn. */
6814 end_cleanup_fn (void)
6816 expand_or_defer_fn (finish_function (0));
6818 pop_from_top_level ();
6821 /* Generate code to handle the destruction of DECL, an object with
6822 static storage duration. */
6825 register_dtor_fn (tree decl
)
6832 bool ob_parm
, dso_parm
, use_dtor
;
6833 tree arg0
, arg1
, arg2
;
6836 type
= TREE_TYPE (decl
);
6837 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6838 return void_zero_node
;
6840 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6841 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6842 destructor to "__cxa_atexit"; we don't have to build a temporary
6843 function to do the cleanup. */
6844 dso_parm
= (flag_use_cxa_atexit
6845 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6846 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6847 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6852 /* Find the destructor. */
6853 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6854 gcc_assert (idx
>= 0);
6855 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6856 /* Make sure it is accessible. */
6857 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6858 tf_warning_or_error
);
6862 /* Call build_cleanup before we enter the anonymous function so
6863 that any access checks will be done relative to the current
6864 scope, rather than the scope of the anonymous function. */
6865 build_cleanup (decl
);
6867 /* Now start the function. */
6868 cleanup
= start_cleanup_fn ();
6870 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6871 to the original function, rather than the anonymous one. That
6872 will make the back end think that nested functions are in use,
6873 which causes confusion. */
6874 push_deferring_access_checks (dk_no_check
);
6875 fcall
= build_cleanup (decl
);
6876 pop_deferring_access_checks ();
6878 /* Create the body of the anonymous function. */
6879 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6880 finish_expr_stmt (fcall
);
6881 finish_compound_stmt (compound_stmt
);
6885 /* Call atexit with the cleanup function. */
6886 mark_used (cleanup
);
6887 cleanup
= build_address (cleanup
);
6889 if (DECL_THREAD_LOCAL_P (decl
))
6890 atex_node
= get_thread_atexit_node ();
6892 atex_node
= get_atexit_node ();
6896 /* We must convert CLEANUP to the type that "__cxa_atexit"
6898 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6899 /* "__cxa_atexit" will pass the address of DECL to the
6900 cleanup function. */
6902 addr
= build_address (decl
);
6903 /* The declared type of the parameter to "__cxa_atexit" is
6904 "void *". For plain "T*", we could just let the
6905 machinery in cp_build_function_call convert it -- but if the
6906 type is "cv-qualified T *", then we need to convert it
6907 before passing it in, to avoid spurious errors. */
6908 addr
= build_nop (ptr_type_node
, addr
);
6911 /* Since the cleanup functions we build ignore the address
6912 they're given, there's no reason to pass the actual address
6913 in, and, in general, it's cheaper to pass NULL than any
6915 addr
= null_pointer_node
;
6918 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6919 tf_warning_or_error
);
6921 /* Just pass NULL to the dso handle parm if we don't actually
6922 have a DSO handle on this target. */
6923 arg2
= null_pointer_node
;
6929 if (!DECL_THREAD_LOCAL_P (decl
)
6930 && targetm
.cxx
.use_aeabi_atexit ())
6946 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6947 arg0
, arg1
, arg2
, NULL_TREE
);
6950 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6951 is its initializer. Generate code to handle the construction
6952 and destruction of DECL. */
6955 expand_static_init (tree decl
, tree init
)
6957 gcc_assert (VAR_P (decl
));
6958 gcc_assert (TREE_STATIC (decl
));
6960 /* Some variables require no dynamic initialization. */
6962 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6965 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6966 && !DECL_FUNCTION_SCOPE_P (decl
))
6969 error ("non-local variable %qD declared %<__thread%> "
6970 "needs dynamic initialization", decl
);
6972 error ("non-local variable %qD declared %<__thread%> "
6973 "has a non-trivial destructor", decl
);
6974 static bool informed
;
6977 inform (DECL_SOURCE_LOCATION (decl
),
6978 "C++11 %<thread_local%> allows dynamic initialization "
6985 if (DECL_FUNCTION_SCOPE_P (decl
))
6987 /* Emit code to perform this initialization but once. */
6988 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6989 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6990 tree guard
, guard_addr
;
6992 /* We don't need thread-safety code for thread-local vars. */
6993 bool thread_guard
= (flag_threadsafe_statics
6994 && !DECL_THREAD_LOCAL_P (decl
));
6996 /* Emit code to perform this initialization but once. This code
6999 static <type> guard;
7000 if (!guard.first_byte) {
7001 if (__cxa_guard_acquire (&guard)) {
7004 // Do initialization.
7005 flag = true; __cxa_guard_release (&guard);
7006 // Register variable for destruction at end of program.
7008 if (!flag) __cxa_guard_abort (&guard);
7012 Note that the `flag' variable is only set to 1 *after* the
7013 initialization is complete. This ensures that an exception,
7014 thrown during the construction, will cause the variable to
7015 reinitialized when we pass through this code again, as per:
7019 If the initialization exits by throwing an exception, the
7020 initialization is not complete, so it will be tried again
7021 the next time control enters the declaration.
7023 This process should be thread-safe, too; multiple threads
7024 should not be able to initialize the variable more than
7027 /* Create the guard variable. */
7028 guard
= get_guard (decl
);
7030 /* This optimization isn't safe on targets with relaxed memory
7031 consistency. On such targets we force synchronization in
7032 __cxa_guard_acquire. */
7033 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7035 /* Begin the conditional initialization. */
7036 if_stmt
= begin_if_stmt ();
7037 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7038 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7043 tree vfntype
= NULL_TREE
;
7044 tree acquire_name
, release_name
, abort_name
;
7045 tree acquire_fn
, release_fn
, abort_fn
;
7046 guard_addr
= build_address (guard
);
7048 acquire_name
= get_identifier ("__cxa_guard_acquire");
7049 release_name
= get_identifier ("__cxa_guard_release");
7050 abort_name
= get_identifier ("__cxa_guard_abort");
7051 acquire_fn
= identifier_global_value (acquire_name
);
7052 release_fn
= identifier_global_value (release_name
);
7053 abort_fn
= identifier_global_value (abort_name
);
7055 acquire_fn
= push_library_fn
7056 (acquire_name
, build_function_type_list (integer_type_node
,
7057 TREE_TYPE (guard_addr
),
7060 if (!release_fn
|| !abort_fn
)
7061 vfntype
= build_function_type_list (void_type_node
,
7062 TREE_TYPE (guard_addr
),
7065 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
7067 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
7069 inner_if_stmt
= begin_if_stmt ();
7070 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7073 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7074 begin
= get_target_expr (boolean_false_node
);
7075 flag
= TARGET_EXPR_SLOT (begin
);
7077 TARGET_EXPR_CLEANUP (begin
)
7078 = build3 (COND_EXPR
, void_type_node
, flag
,
7080 build_call_n (abort_fn
, 1, guard_addr
));
7081 CLEANUP_EH_ONLY (begin
) = 1;
7083 /* Do the initialization itself. */
7084 init
= add_stmt_to_compound (begin
, init
);
7085 init
= add_stmt_to_compound
7086 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7087 init
= add_stmt_to_compound
7088 (init
, build_call_n (release_fn
, 1, guard_addr
));
7091 init
= add_stmt_to_compound (init
, set_guard (guard
));
7093 /* Use atexit to register a function for destroying this static
7095 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7097 finish_expr_stmt (init
);
7101 finish_compound_stmt (inner_then_clause
);
7102 finish_then_clause (inner_if_stmt
);
7103 finish_if_stmt (inner_if_stmt
);
7106 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7108 finish_compound_stmt (then_clause
);
7109 finish_then_clause (if_stmt
);
7110 finish_if_stmt (if_stmt
);
7113 else if (DECL_THREAD_LOCAL_P (decl
))
7114 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7116 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7120 /* Make TYPE a complete type based on INITIAL_VALUE.
7121 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7122 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7123 3 if the initializer list is empty (in pedantic mode). */
7126 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7129 tree type
, elt_type
;
7133 unsigned HOST_WIDE_INT i
;
7136 /* An array of character type can be initialized from a
7137 brace-enclosed string constant.
7139 FIXME: this code is duplicated from reshape_init. Probably
7140 we should just call reshape_init here? */
7141 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7142 && TREE_CODE (initial_value
) == CONSTRUCTOR
7143 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7145 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7146 tree value
= (*v
)[0].value
;
7148 if (TREE_CODE (value
) == STRING_CST
7149 && v
->length () == 1)
7150 initial_value
= value
;
7153 /* If any of the elements are parameter packs, we can't actually
7154 complete this type now because the array size is dependent. */
7155 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7157 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7160 if (PACK_EXPANSION_P (value
))
7166 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7168 /* We can create the array before the element type is complete, which
7169 means that we didn't have these two bits set in the original type
7170 either. In completing the type, we are expected to propagate these
7171 bits. See also complete_type which does the same thing for arrays
7174 if (TYPE_DOMAIN (type
))
7176 elt_type
= TREE_TYPE (type
);
7177 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7178 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7179 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7185 /* As above, but either give an error or reject zero-size arrays, depending
7189 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7190 bool do_default
, tsubst_flags_t complain
)
7193 bool sfinae
= !(complain
& tf_error
);
7194 /* In SFINAE context we can't be lenient about zero-size arrays. */
7197 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7203 /* Not an error. */;
7204 else if (failure
== 1)
7205 error ("initializer fails to determine size of %qT", *ptype
);
7206 else if (failure
== 2)
7209 error ("array size missing in %qT", *ptype
);
7211 else if (failure
== 3)
7212 error ("zero-size array %qT", *ptype
);
7213 *ptype
= error_mark_node
;
7218 /* Return zero if something is declared to be a member of type
7219 CTYPE when in the context of CUR_TYPE. STRING is the error
7220 message to print in that case. Otherwise, quietly return 1. */
7223 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7225 if (ctype
&& ctype
!= cur_type
)
7227 if (flags
== DTOR_FLAG
)
7228 error ("destructor for alien class %qT cannot be a member", ctype
);
7230 error ("constructor for alien class %qT cannot be a member", ctype
);
7236 /* Subroutine of `grokdeclarator'. */
7238 /* Generate errors possibly applicable for a given set of specifiers.
7239 This is for ARM $7.1.2. */
7242 bad_specifiers (tree object
,
7243 enum bad_spec_place type
,
7254 error ("%qD declared as a %<virtual%> variable", object
);
7256 error ("%qD declared as an %<inline%> variable", object
);
7258 error ("%<const%> and %<volatile%> function specifiers on "
7259 "%qD invalid in variable declaration", object
);
7263 error ("%qD declared as a %<virtual%> parameter", object
);
7265 error ("%qD declared as an %<inline%> parameter", object
);
7267 error ("%<const%> and %<volatile%> function specifiers on "
7268 "%qD invalid in parameter declaration", object
);
7272 error ("%qD declared as a %<virtual%> type", object
);
7274 error ("%qD declared as an %<inline%> type", object
);
7276 error ("%<const%> and %<volatile%> function specifiers on "
7277 "%qD invalid in type declaration", object
);
7281 error ("%qD declared as a %<virtual%> field", object
);
7283 error ("%qD declared as an %<inline%> field", object
);
7285 error ("%<const%> and %<volatile%> function specifiers on "
7286 "%qD invalid in field declaration", object
);
7292 error ("%q+D declared as a friend", object
);
7294 && (TREE_CODE (object
) == TYPE_DECL
7295 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7296 && !TYPE_REFFN_P (TREE_TYPE (object
))
7297 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7298 error ("%q+D declared with an exception specification", object
);
7301 /* DECL is a member function or static data member and is presently
7302 being defined. Check that the definition is taking place in a
7306 check_class_member_definition_namespace (tree decl
)
7308 /* These checks only apply to member functions and static data
7310 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7311 /* We check for problems with specializations in pt.c in
7312 check_specialization_namespace, where we can issue better
7314 if (processing_specialization
)
7316 /* There are no restrictions on the placement of
7317 explicit instantiations. */
7318 if (processing_explicit_instantiation
)
7322 A member function definition that appears outside of the
7323 class definition shall appear in a namespace scope enclosing
7324 the class definition.
7328 The definition for a static data member shall appear in a
7329 namespace scope enclosing the member's class definition. */
7330 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7331 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7332 decl
, DECL_CONTEXT (decl
));
7335 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7336 METHOD_TYPE for a non-static member function; QUALS are the
7337 cv-qualifiers that apply to the function. */
7340 build_this_parm (tree type
, cp_cv_quals quals
)
7345 cp_cv_quals this_quals
;
7347 if (CLASS_TYPE_P (type
))
7350 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7351 this_type
= build_pointer_type (this_type
);
7354 this_type
= type_of_this_parm (type
);
7355 /* The `this' parameter is implicitly `const'; it cannot be
7357 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7358 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7359 parm
= build_artificial_parm (this_identifier
, qual_type
);
7360 cp_apply_type_quals_to_decl (this_quals
, parm
);
7364 /* DECL is a static member function. Complain if it was declared
7365 with function-cv-quals. */
7368 check_static_quals (tree decl
, cp_cv_quals quals
)
7370 if (quals
!= TYPE_UNQUALIFIED
)
7371 error ("static member function %q#D declared with type qualifiers",
7375 // Check that FN takes no arguments and returns bool.
7377 check_concept_fn (tree fn
)
7379 // A constraint is nullary.
7380 if (DECL_ARGUMENTS (fn
))
7381 error ("concept %q#D declared with function parameters", fn
);
7383 // The result type must be convertible to bool.
7384 if (!same_type_p (TREE_TYPE (TREE_TYPE (fn
)), boolean_type_node
))
7385 error ("concept %q#D result must be bool", fn
);
7388 /* CTYPE is class type, or null if non-class.
7389 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7391 DECLARATOR is the function's name.
7392 PARMS is a chain of PARM_DECLs for the function.
7393 VIRTUALP is truthvalue of whether the function is virtual or not.
7394 FLAGS are to be passed through to `grokclassfn'.
7395 QUALS are qualifiers indicating whether the function is `const'
7397 RAISES is a list of exceptions that this function can raise.
7398 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7399 not look, and -1 if we should not call `grokclassfn' at all.
7401 SFK is the kind of special function (if any) for the new function.
7403 Returns `NULL_TREE' if something goes wrong, after issuing
7404 applicable error messages. */
7407 grokfndecl (tree ctype
,
7411 tree orig_declarator
,
7413 enum overload_flags flags
,
7415 cp_ref_qualifier rqual
,
7421 special_function_kind sfk
,
7426 location_t location
)
7429 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7433 type
= build_ref_qualified_type (type
, rqual
);
7435 type
= build_exception_variant (type
, raises
);
7437 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7439 /* If we have an explicit location, use it, otherwise use whatever
7440 build_lang_decl used (probably input_location). */
7441 if (location
!= UNKNOWN_LOCATION
)
7442 DECL_SOURCE_LOCATION (decl
) = location
;
7444 if (TREE_CODE (type
) == METHOD_TYPE
)
7447 parm
= build_this_parm (type
, quals
);
7448 DECL_CHAIN (parm
) = parms
;
7451 DECL_ARGUMENTS (decl
) = parms
;
7452 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7453 DECL_CONTEXT (t
) = decl
;
7454 /* Propagate volatile out from type to decl. */
7455 if (TYPE_VOLATILE (type
))
7456 TREE_THIS_VOLATILE (decl
) = 1;
7458 /* Setup decl according to sfk. */
7461 case sfk_constructor
:
7462 case sfk_copy_constructor
:
7463 case sfk_move_constructor
:
7464 DECL_CONSTRUCTOR_P (decl
) = 1;
7466 case sfk_destructor
:
7467 DECL_DESTRUCTOR_P (decl
) = 1;
7473 /* If pointers to member functions use the least significant bit to
7474 indicate whether a function is virtual, ensure a pointer
7475 to this function will have that bit clear. */
7476 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7477 && TREE_CODE (type
) == METHOD_TYPE
7478 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7479 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7482 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7486 ("defining explicit specialization %qD in friend declaration",
7490 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7491 tree args
= TREE_OPERAND (orig_declarator
, 1);
7493 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7495 /* Something like `template <class T> friend void f<T>()'. */
7496 error ("invalid use of template-id %qD in declaration "
7497 "of primary template",
7503 /* A friend declaration of the form friend void f<>(). Record
7504 the information in the TEMPLATE_ID_EXPR. */
7505 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7507 if (TREE_CODE (fns
) == COMPONENT_REF
)
7509 /* Due to bison parser ickiness, we will have already looked
7510 up an operator_name or PFUNCNAME within the current class
7511 (see template_id in parse.y). If the current class contains
7512 such a name, we'll get a COMPONENT_REF here. Undo that. */
7514 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7515 == current_class_type
);
7516 fns
= TREE_OPERAND (fns
, 1);
7518 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7519 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
, NULL_TREE
);
7521 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7522 if (TREE_PURPOSE (t
)
7523 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7525 error ("default arguments are not allowed in declaration "
7526 "of friend template specialization %qD",
7532 error ("%<inline%> is not allowed in declaration of friend "
7533 "template specialization %qD",
7536 error ("%<constexpr%> is not allowed in declaration of friend "
7537 "template specialization %qD",
7544 /* If this decl has namespace scope, set that up. */
7546 set_decl_namespace (decl
, in_namespace
, friendp
);
7548 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7550 /* `main' and builtins have implicit 'C' linkage. */
7551 if ((MAIN_NAME_P (declarator
)
7552 || (IDENTIFIER_LENGTH (declarator
) > 10
7553 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7554 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7555 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7556 && current_lang_name
== lang_name_cplusplus
7557 && ctype
== NULL_TREE
7558 && DECL_FILE_SCOPE_P (decl
))
7559 SET_DECL_LANGUAGE (decl
, lang_c
);
7561 /* Should probably propagate const out from type to decl I bet (mrs). */
7564 DECL_STATIC_FUNCTION_P (decl
) = 1;
7565 DECL_CONTEXT (decl
) = ctype
;
7570 DECL_CONTEXT (decl
) = ctype
;
7572 check_class_member_definition_namespace (decl
);
7575 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7577 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7578 error ("cannot declare %<::main%> to be a template");
7580 error ("cannot declare %<::main%> to be inline");
7582 error ("cannot declare %<::main%> to be constexpr");
7584 error ("cannot declare %<::main%> to be static");
7589 /* Members of anonymous types and local classes have no linkage; make
7590 them internal. If a typedef is made later, this will be changed. */
7591 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7592 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7595 if (publicp
&& cxx_dialect
== cxx98
)
7597 /* [basic.link]: A name with no linkage (notably, the name of a class
7598 or enumeration declared in a local scope) shall not be used to
7599 declare an entity with linkage.
7601 DR 757 relaxes this restriction for C++0x. */
7602 t
= no_linkage_check (TREE_TYPE (decl
),
7603 /*relaxed_p=*/false);
7606 if (TYPE_ANONYMOUS_P (t
))
7608 if (DECL_EXTERN_C_P (decl
))
7609 /* Allow this; it's pretty common in C. */;
7612 permerror (input_location
, "anonymous type with no linkage "
7613 "used to declare function %q#D with linkage",
7615 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7616 permerror (input_location
, "%q+#D does not refer to the unqualified "
7617 "type, so it is not used for linkage",
7622 permerror (input_location
, "type %qT with no linkage used to "
7623 "declare function %q#D with linkage", t
, decl
);
7627 TREE_PUBLIC (decl
) = publicp
;
7630 DECL_INTERFACE_KNOWN (decl
) = 1;
7631 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7634 /* If the declaration was declared inline, mark it as such. */
7636 DECL_DECLARED_INLINE_P (decl
) = 1;
7638 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7640 // If the concept declaration specifier was found, check
7641 // that the declaration satisfies the necessary requirements.
7644 DECL_DECLARED_CONCEPT_P (decl
) = true;
7645 check_concept_fn (decl
);
7648 DECL_EXTERNAL (decl
) = 1;
7649 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7654 ? G_("static member function %qD cannot have cv-qualifier")
7655 : G_("non-member function %qD cannot have cv-qualifier"),
7657 quals
= TYPE_UNQUALIFIED
;
7663 ? G_("static member function %qD cannot have ref-qualifier")
7664 : G_("non-member function %qD cannot have ref-qualifier"),
7666 rqual
= REF_QUAL_NONE
;
7670 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7671 && !grok_op_properties (decl
, /*complain=*/true))
7673 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7675 bool long_long_unsigned_p
;
7677 const char *suffix
= NULL
;
7678 /* [over.literal]/6: Literal operators shall not have C linkage. */
7679 if (DECL_LANGUAGE (decl
) == lang_c
)
7681 error ("literal operator with C linkage");
7685 if (DECL_NAMESPACE_SCOPE_P (decl
))
7687 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7690 error ("%qD has invalid argument list", decl
);
7694 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7695 if (long_long_unsigned_p
)
7697 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7698 warning (0, "integer suffix %<%s%>"
7699 " shadowed by implementation", suffix
);
7701 else if (long_double_p
)
7703 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7704 warning (0, "floating point suffix %<%s%>"
7705 " shadowed by implementation", suffix
);
7710 error ("%qD must be a non-member function", decl
);
7716 /* Make the init_value nonzero so pushdecl knows this is not
7717 tentative. error_mark_node is replaced later with the BLOCK. */
7718 DECL_INITIAL (decl
) = error_mark_node
;
7720 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7721 TREE_NOTHROW (decl
) = 1;
7723 /* Caller will do the rest of this. */
7727 if (ctype
!= NULL_TREE
)
7728 grokclassfn (ctype
, decl
, flags
);
7731 if (cxx_dialect
>= cxx0x
7732 && DECL_DESTRUCTOR_P (decl
)
7733 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7734 && !processing_template_decl
)
7735 deduce_noexcept_on_destructor (decl
);
7737 decl
= check_explicit_specialization (orig_declarator
, decl
,
7740 4 * (friendp
!= 0));
7741 if (decl
== error_mark_node
)
7744 if (DECL_STATIC_FUNCTION_P (decl
))
7745 check_static_quals (decl
, quals
);
7749 cplus_decl_attributes (&decl
, *attrlist
, 0);
7750 *attrlist
= NULL_TREE
;
7753 /* Check main's type after attributes have been applied. */
7754 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7756 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7759 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7761 error ("%<::main%> must return %<int%>");
7762 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7763 TREE_TYPE (decl
) = newtype
;
7766 check_main_parameter_types (decl
);
7769 if (ctype
!= NULL_TREE
7770 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7773 tree old_decl
= check_classfn (ctype
, decl
,
7774 (processing_template_decl
7775 > template_class_depth (ctype
))
7776 ? current_template_parms
7779 if (old_decl
== error_mark_node
)
7787 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7788 /* Because grokfndecl is always supposed to return a
7789 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7790 here. We depend on our callers to figure out that its
7791 really a template that's being returned. */
7792 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7794 if (DECL_STATIC_FUNCTION_P (old_decl
)
7795 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7797 /* Remove the `this' parm added by grokclassfn. */
7798 revert_static_member_fn (decl
);
7799 check_static_quals (decl
, quals
);
7801 if (DECL_ARTIFICIAL (old_decl
))
7803 error ("definition of implicitly-declared %qD", old_decl
);
7806 else if (DECL_DEFAULTED_FN (old_decl
))
7808 error ("definition of explicitly-defaulted %q+D", decl
);
7809 error ("%q+#D explicitly defaulted here", old_decl
);
7813 /* Since we've smashed OLD_DECL to its
7814 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7815 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7816 decl
= DECL_TEMPLATE_RESULT (decl
);
7818 /* Attempt to merge the declarations. This can fail, in
7819 the case of some invalid specialization declarations. */
7820 pushed_scope
= push_scope (ctype
);
7821 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7823 pop_scope (pushed_scope
);
7826 error ("no %q#D member function declared in class %qT",
7834 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7837 if (ctype
== NULL_TREE
|| check
)
7841 DECL_VIRTUAL_P (decl
) = 1;
7846 /* decl is a FUNCTION_DECL.
7847 specifiers are the parsed virt-specifiers.
7849 Set flags to reflect the virt-specifiers.
7854 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7856 if (decl
== NULL_TREE
)
7858 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7859 DECL_OVERRIDE_P (decl
) = 1;
7860 if (specifiers
& VIRT_SPEC_FINAL
)
7861 DECL_FINAL_P (decl
) = 1;
7865 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7866 the linkage that DECL will receive in the object file. */
7869 set_linkage_for_static_data_member (tree decl
)
7871 /* A static data member always has static storage duration and
7872 external linkage. Note that static data members are forbidden in
7873 local classes -- the only situation in which a class has
7874 non-external linkage. */
7875 TREE_PUBLIC (decl
) = 1;
7876 TREE_STATIC (decl
) = 1;
7877 /* For non-template classes, static data members are always put
7878 out in exactly those files where they are defined, just as
7879 with ordinary namespace-scope variables. */
7880 if (!processing_template_decl
)
7881 DECL_INTERFACE_KNOWN (decl
) = 1;
7884 /* Create a VAR_DECL named NAME with the indicated TYPE.
7886 If SCOPE is non-NULL, it is the class type or namespace containing
7887 the variable. If SCOPE is NULL, the variable should is created in
7888 the innermost enclosings scope. */
7891 grokvardecl (tree type
,
7893 const cp_decl_specifier_seq
*declspecs
,
7899 tree explicit_scope
;
7901 gcc_assert (!name
|| identifier_p (name
));
7903 /* Compute the scope in which to place the variable, but remember
7904 whether or not that scope was explicitly specified by the user. */
7905 explicit_scope
= scope
;
7908 /* An explicit "extern" specifier indicates a namespace-scope
7910 if (declspecs
->storage_class
== sc_extern
)
7911 scope
= current_decl_namespace ();
7912 else if (!at_function_scope_p ())
7913 scope
= current_scope ();
7917 && (/* If the variable is a namespace-scope variable declared in a
7918 template, we need DECL_LANG_SPECIFIC. */
7919 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7920 /* Similarly for namespace-scope variables with language linkage
7922 || (TREE_CODE (scope
) == NAMESPACE_DECL
7923 && current_lang_name
!= lang_name_cplusplus
)
7924 /* Similarly for static data members. */
7926 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7928 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7930 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7931 set_decl_namespace (decl
, explicit_scope
, 0);
7933 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7935 if (declspecs
->storage_class
== sc_extern
)
7937 DECL_THIS_EXTERN (decl
) = 1;
7938 DECL_EXTERNAL (decl
) = !initialized
;
7941 if (DECL_CLASS_SCOPE_P (decl
))
7943 set_linkage_for_static_data_member (decl
);
7944 /* This function is only called with out-of-class definitions. */
7945 DECL_EXTERNAL (decl
) = 0;
7946 check_class_member_definition_namespace (decl
);
7948 /* At top level, either `static' or no s.c. makes a definition
7949 (perhaps tentative), and absence of `static' makes it public. */
7950 else if (toplevel_bindings_p ())
7952 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7953 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7954 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7956 /* Not at top level, only `static' makes a static definition. */
7959 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7960 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7963 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7965 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7966 if (declspecs
->gnu_thread_keyword_p
)
7967 DECL_GNU_TLS_P (decl
) = true;
7970 /* If the type of the decl has no linkage, make sure that we'll
7971 notice that in mark_used. */
7972 if (cxx_dialect
> cxx98
7973 && decl_linkage (decl
) != lk_none
7974 && DECL_LANG_SPECIFIC (decl
) == NULL
7975 && !DECL_EXTERN_C_P (decl
)
7976 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7977 retrofit_lang_decl (decl
);
7979 if (TREE_PUBLIC (decl
))
7981 /* [basic.link]: A name with no linkage (notably, the name of a class
7982 or enumeration declared in a local scope) shall not be used to
7983 declare an entity with linkage.
7985 DR 757 relaxes this restriction for C++0x. */
7986 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7987 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7990 if (TYPE_ANONYMOUS_P (t
))
7992 if (DECL_EXTERN_C_P (decl
))
7993 /* Allow this; it's pretty common in C. */
7997 /* DRs 132, 319 and 389 seem to indicate types with
7998 no linkage can only be used to declare extern "C"
7999 entities. Since it's not always an error in the
8000 ISO C++ 90 Standard, we only issue a warning. */
8001 warning (0, "anonymous type with no linkage used to declare "
8002 "variable %q#D with linkage", decl
);
8003 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
8004 warning (0, "%q+#D does not refer to the unqualified "
8005 "type, so it is not used for linkage",
8010 warning (0, "type %qT with no linkage used to declare variable "
8011 "%q#D with linkage", t
, decl
);
8015 DECL_INTERFACE_KNOWN (decl
) = 1;
8020 /* Create and return a canonical pointer to member function type, for
8021 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8024 build_ptrmemfunc_type (tree type
)
8028 tree unqualified_variant
= NULL_TREE
;
8030 if (type
== error_mark_node
)
8033 /* If a canonical type already exists for this type, use it. We use
8034 this method instead of type_hash_canon, because it only does a
8035 simple equality check on the list of field members. */
8037 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8040 /* Make sure that we always have the unqualified pointer-to-member
8042 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8044 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8046 t
= make_class_type (RECORD_TYPE
);
8047 xref_basetypes (t
, NULL_TREE
);
8049 /* Let the front end know this is a pointer to member function... */
8050 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8051 /* ... and not really a class type. */
8052 SET_CLASS_TYPE_P (t
, 0);
8054 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8057 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8059 DECL_CHAIN (field
) = fields
;
8062 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8064 /* Zap out the name so that the back end will give us the debugging
8065 information for this anonymous RECORD_TYPE. */
8066 TYPE_NAME (t
) = NULL_TREE
;
8068 /* If this is not the unqualified form of this pointer-to-member
8069 type, set the TYPE_MAIN_VARIANT for this type to be the
8070 unqualified type. Since they are actually RECORD_TYPEs that are
8071 not variants of each other, we must do this manually.
8072 As we just built a new type there is no need to do yet another copy. */
8073 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8075 int type_quals
= cp_type_quals (type
);
8076 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
8077 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
8078 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
8079 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8080 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8081 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8082 TREE_TYPE (TYPE_BINFO (t
)) = t
;
8085 /* Cache this pointer-to-member type so that we can find it again
8087 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8089 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8090 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8091 else if (TYPE_CANONICAL (type
) != type
)
8092 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8097 /* Create and return a pointer to data member type. */
8100 build_ptrmem_type (tree class_type
, tree member_type
)
8102 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8104 cp_cv_quals quals
= type_memfn_quals (member_type
);
8105 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8106 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8107 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8111 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8112 return build_offset_type (class_type
, member_type
);
8116 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8117 Check to see that the definition is valid. Issue appropriate error
8118 messages. Return 1 if the definition is particularly bad, or 0
8122 check_static_variable_definition (tree decl
, tree type
)
8124 /* Can't check yet if we don't know the type. */
8125 if (dependent_type_p (type
))
8127 /* If DECL is declared constexpr, we'll do the appropriate checks
8128 in check_initializer. */
8129 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8131 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8133 if (!COMPLETE_TYPE_P (type
))
8134 error ("in-class initialization of static data member %q#D of "
8135 "incomplete type", decl
);
8136 else if (literal_type_p (type
))
8137 permerror (input_location
,
8138 "%<constexpr%> needed for in-class initialization of "
8139 "static data member %q#D of non-integral type", decl
);
8141 error ("in-class initialization of static data member %q#D of "
8142 "non-literal type", decl
);
8146 /* Motion 10 at San Diego: If a static const integral data member is
8147 initialized with an integral constant expression, the initializer
8148 may appear either in the declaration (within the class), or in
8149 the definition, but not both. If it appears in the class, the
8150 member is a member constant. The file-scope definition is always
8152 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8154 error ("invalid in-class initialization of static data member "
8155 "of non-integral type %qT",
8159 else if (!CP_TYPE_CONST_P (type
))
8160 error ("ISO C++ forbids in-class initialization of non-const "
8161 "static member %qD",
8163 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8164 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8165 "%qD of non-integral type %qT", decl
, type
);
8170 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8171 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8172 expressions out into temporary variables so that walk_tree doesn't
8173 step into them (c++/15764). */
8176 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8178 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8179 tree expr
= *expr_p
;
8180 if (TREE_CODE (expr
) == SAVE_EXPR
)
8182 tree op
= TREE_OPERAND (expr
, 0);
8183 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8184 if (TREE_SIDE_EFFECTS (op
))
8185 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8188 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8193 /* Entry point for the above. */
8196 stabilize_vla_size (tree size
)
8198 struct pointer_set_t
*pset
= pointer_set_create ();
8199 /* Break out any function calls into temporary variables. */
8200 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8201 pointer_set_destroy (pset
);
8204 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8205 not inside of SAVE_EXPR and fold them. */
8208 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8210 tree expr
= *expr_p
;
8211 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8213 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8215 *(bool *)data
= true;
8216 if (SIZEOF_EXPR_TYPE_P (expr
))
8217 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8218 SIZEOF_EXPR
, false);
8219 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8220 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8223 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8225 if (expr
== error_mark_node
)
8226 expr
= size_one_node
;
8233 /* Given the SIZE (i.e., number of elements) in an array, compute an
8234 appropriate index type for the array. If non-NULL, NAME is the
8235 name of the thing being declared. */
8238 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8242 tree abi_1_itype
= NULL_TREE
;
8244 if (error_operand_p (size
))
8245 return error_mark_node
;
8247 if (!type_dependent_expression_p (size
))
8249 tree type
= TREE_TYPE (size
);
8251 mark_rvalue_use (size
);
8253 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
8254 && TREE_SIDE_EFFECTS (size
))
8255 /* In C++98, we mark a non-constant array bound with a magic
8256 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8259 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8261 if (CLASS_TYPE_P (type
)
8262 && CLASSTYPE_LITERAL_P (type
))
8264 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8267 if (!(complain
& tf_error
))
8268 return error_mark_node
;
8270 error ("size of array %qD has non-integral type %qT",
8273 error ("size of array has non-integral type %qT", type
);
8274 size
= integer_one_node
;
8276 if (size
== error_mark_node
)
8277 return error_mark_node
;
8278 type
= TREE_TYPE (size
);
8279 /* We didn't support this case in GCC 3.2, so don't bother
8280 trying to model it now in ABI v1. */
8281 abi_1_itype
= error_mark_node
;
8284 size
= maybe_constant_value (size
);
8285 if (!TREE_CONSTANT (size
))
8289 if (error_operand_p (size
))
8290 return error_mark_node
;
8292 /* The array bound must be an integer type. */
8293 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8295 if (!(complain
& tf_error
))
8296 return error_mark_node
;
8298 error ("size of array %qD has non-integral type %qT", name
, type
);
8300 error ("size of array has non-integral type %qT", type
);
8301 size
= integer_one_node
;
8302 type
= TREE_TYPE (size
);
8306 /* A type is dependent if it is...an array type constructed from any
8307 dependent type or whose size is specified by a constant expression
8308 that is value-dependent. */
8309 /* We can only call value_dependent_expression_p on integral constant
8310 expressions; treat non-constant expressions as dependent, too. */
8311 if (processing_template_decl
8312 && (type_dependent_expression_p (size
)
8313 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8315 /* We cannot do any checking for a SIZE that isn't known to be
8316 constant. Just build the index type and mark that it requires
8317 structural equality checks. */
8318 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8319 size
, size_one_node
));
8320 TYPE_DEPENDENT_P (itype
) = 1;
8321 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8322 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8326 if (!abi_version_at_least (2) && processing_template_decl
8327 && abi_1_itype
== NULL_TREE
)
8328 /* For abi-1, we handled all instances in templates the same way,
8329 even when they were non-dependent. This affects the manglings
8330 produced. So, we do the normal checking for non-dependent
8331 sizes, but at the end we'll return the same type that abi-1
8332 would have, but with TYPE_CANONICAL set to the "right"
8333 value that the current ABI would provide. */
8334 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8335 osize
, integer_one_node
));
8337 /* Normally, the array-bound will be a constant. */
8338 if (TREE_CODE (size
) == INTEGER_CST
)
8340 /* Check to see if the array bound overflowed. Make that an
8341 error, no matter how generous we're being. */
8342 constant_expression_error (size
);
8344 /* An array must have a positive number of elements. */
8345 if (INT_CST_LT (size
, integer_zero_node
))
8347 if (!(complain
& tf_error
))
8348 return error_mark_node
;
8350 error ("size of array %qD is negative", name
);
8352 error ("size of array is negative");
8353 size
= integer_one_node
;
8355 /* As an extension we allow zero-sized arrays. */
8356 else if (integer_zerop (size
))
8358 if (!(complain
& tf_error
))
8359 /* We must fail if performing argument deduction (as
8360 indicated by the state of complain), so that
8361 another substitution can be found. */
8362 return error_mark_node
;
8363 else if (in_system_header
)
8364 /* Allow them in system headers because glibc uses them. */;
8366 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8368 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8371 else if (TREE_CONSTANT (size
)
8372 /* We don't allow VLAs at non-function scopes, or during
8373 tentative template substitution. */
8374 || !at_function_scope_p ()
8375 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8377 if (!(complain
& tf_error
))
8378 return error_mark_node
;
8379 /* `(int) &fn' is not a valid array bound. */
8381 error ("size of array %qD is not an integral constant-expression",
8384 error ("size of array is not an integral constant-expression");
8385 size
= integer_one_node
;
8387 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8390 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8392 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8394 else if (warn_vla
> 0)
8398 "variable length array %qD is used", name
);
8401 "variable length array is used");
8404 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8405 /* A variable sized array. */
8406 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8409 HOST_WIDE_INT saved_processing_template_decl
;
8411 /* Compute the index of the largest element in the array. It is
8412 one less than the number of elements in the array. We save
8413 and restore PROCESSING_TEMPLATE_DECL so that computations in
8414 cp_build_binary_op will be appropriately folded. */
8415 saved_processing_template_decl
= processing_template_decl
;
8416 processing_template_decl
= 0;
8417 itype
= cp_build_binary_op (input_location
,
8419 cp_convert (ssizetype
, size
, complain
),
8420 cp_convert (ssizetype
, integer_one_node
,
8423 itype
= fold (itype
);
8424 processing_template_decl
= saved_processing_template_decl
;
8426 if (!TREE_CONSTANT (itype
))
8428 /* A variable sized array. */
8429 itype
= variable_size (itype
);
8430 if (TREE_CODE (itype
) != SAVE_EXPR
)
8432 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8433 they might survive till gimplification. */
8434 tree newitype
= itype
;
8436 cp_walk_tree_without_duplicates (&newitype
,
8437 fold_sizeof_expr_r
, &found
);
8439 itype
= variable_size (fold (newitype
));
8442 /* Make sure that there was no overflow when creating to a signed
8443 index type. (For example, on a 32-bit machine, an array with
8444 size 2^32 - 1 is too big.) */
8445 else if (TREE_CODE (itype
) == INTEGER_CST
8446 && TREE_OVERFLOW (itype
))
8448 if (!(complain
& tf_error
))
8449 return error_mark_node
;
8450 error ("overflow in array dimension");
8451 TREE_OVERFLOW (itype
) = 0;
8455 /* Create and return the appropriate index type. */
8456 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8458 tree t
= build_index_type (itype
);
8459 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8460 itype
= abi_1_itype
;
8463 itype
= build_index_type (itype
);
8465 /* If the index type were dependent, we would have returned early, so
8466 remember that it isn't. */
8467 TYPE_DEPENDENT_P (itype
) = 0;
8468 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8472 /* Returns the scope (if any) in which the entity declared by
8473 DECLARATOR will be located. If the entity was declared with an
8474 unqualified name, NULL_TREE is returned. */
8477 get_scope_of_declarator (const cp_declarator
*declarator
)
8479 while (declarator
&& declarator
->kind
!= cdk_id
)
8480 declarator
= declarator
->declarator
;
8482 /* If the declarator-id is a SCOPE_REF, the scope in which the
8483 declaration occurs is the first operand. */
8485 && declarator
->u
.id
.qualifying_scope
)
8486 return declarator
->u
.id
.qualifying_scope
;
8488 /* Otherwise, the declarator is not a qualified name; the entity will
8489 be declared in the current scope. */
8493 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8494 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8498 create_array_type_for_decl (tree name
, tree type
, tree size
)
8500 tree itype
= NULL_TREE
;
8502 /* If things have already gone awry, bail now. */
8503 if (type
== error_mark_node
|| size
== error_mark_node
)
8504 return error_mark_node
;
8506 /* 8.3.4/1: If the type of the identifier of D contains the auto
8507 type-specifier, the program is ill-formed. */
8508 if (pedantic
&& type_uses_auto (type
))
8509 pedwarn (input_location
, OPT_Wpedantic
,
8510 "declaration of %qD as array of %<auto%>", name
);
8512 /* If there are some types which cannot be array elements,
8513 issue an error-message and return. */
8514 switch (TREE_CODE (type
))
8518 error ("declaration of %qD as array of void", name
);
8520 error ("creating array of void");
8521 return error_mark_node
;
8525 error ("declaration of %qD as array of functions", name
);
8527 error ("creating array of functions");
8528 return error_mark_node
;
8530 case REFERENCE_TYPE
:
8532 error ("declaration of %qD as array of references", name
);
8534 error ("creating array of references");
8535 return error_mark_node
;
8539 error ("declaration of %qD as array of function members", name
);
8541 error ("creating array of function members");
8542 return error_mark_node
;
8550 The constant expressions that specify the bounds of the arrays
8551 can be omitted only for the first member of the sequence. */
8552 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8555 error ("declaration of %qD as multidimensional array must "
8556 "have bounds for all dimensions except the first",
8559 error ("multidimensional array must have bounds for all "
8560 "dimensions except the first");
8562 return error_mark_node
;
8565 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
8566 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8568 /* Figure out the index type for the array. */
8570 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8573 T is called the array element type; this type shall not be [...] an
8574 abstract class type. */
8575 abstract_virtuals_error (name
, type
);
8577 return build_cplus_array_type (type
, itype
);
8580 /* Check that it's OK to declare a function with the indicated TYPE.
8581 SFK indicates the kind of special function (if any) that this
8582 function is. OPTYPE is the type given in a conversion operator
8583 declaration, or the class type for a constructor/destructor.
8584 Returns the actual return type of the function; that
8585 may be different than TYPE if an error occurs, or for certain
8586 special functions. */
8589 check_special_function_return_type (special_function_kind sfk
,
8595 case sfk_constructor
:
8597 error ("return type specification for constructor invalid");
8599 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8600 type
= build_pointer_type (optype
);
8602 type
= void_type_node
;
8605 case sfk_destructor
:
8607 error ("return type specification for destructor invalid");
8608 /* We can't use the proper return type here because we run into
8609 problems with ambiguous bases and covariant returns.
8610 Java classes are left unchanged because (void *) isn't a valid
8611 Java type, and we don't want to change the Java ABI. */
8612 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8613 type
= build_pointer_type (void_type_node
);
8615 type
= void_type_node
;
8618 case sfk_conversion
:
8620 error ("return type specified for %<operator %T%>", optype
);
8631 /* A variable or data member (whose unqualified name is IDENTIFIER)
8632 has been declared with the indicated TYPE. If the TYPE is not
8633 acceptable, issue an error message and return a type to use for
8634 error-recovery purposes. */
8637 check_var_type (tree identifier
, tree type
)
8639 if (VOID_TYPE_P (type
))
8642 error ("unnamed variable or field declared void");
8643 else if (identifier_p (identifier
))
8645 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8646 error ("variable or field %qE declared void", identifier
);
8649 error ("variable or field declared void");
8650 type
= error_mark_node
;
8656 /* Functions for adjusting the visibility of a tagged type and its nested
8657 types when it gets a name for linkage purposes from a typedef. */
8659 static void bt_reset_linkage (binding_entry
, void *);
8661 reset_type_linkage (tree type
)
8663 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8664 if (CLASS_TYPE_P (type
))
8665 binding_table_foreach (CLASSTYPE_NESTED_UTDS (type
), bt_reset_linkage
, NULL
);
8668 bt_reset_linkage (binding_entry b
, void */
*data*/
)
8670 reset_type_linkage (b
->type
);
8673 /* Given declspecs and a declarator (abstract or otherwise), determine
8674 the name and type of the object declared and construct a DECL node
8677 DECLSPECS points to the representation of declaration-specifier
8678 sequence that precedes declarator.
8680 DECL_CONTEXT says which syntactic context this declaration is in:
8681 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8682 FUNCDEF for a function definition. Like NORMAL but a few different
8683 error messages in each case. Return value may be zero meaning
8684 this definition is too screwy to try to parse.
8685 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8686 handle member functions (which have FIELD context).
8687 Return value may be zero meaning this definition is too screwy to
8689 PARM for a parameter declaration (either within a function prototype
8690 or before a function body). Make a PARM_DECL, or return void_type_node.
8691 TPARM for a template parameter declaration.
8692 CATCHPARM for a parameter declaration before a catch clause.
8693 TYPENAME if for a typename (in a cast or sizeof).
8694 Don't make a DECL node; just return the ..._TYPE node.
8695 FIELD for a struct or union field; make a FIELD_DECL.
8696 BITFIELD for a field with specified width.
8698 INITIALIZED is as for start_decl.
8700 ATTRLIST is a pointer to the list of attributes, which may be NULL
8701 if there are none; *ATTRLIST may be modified if attributes from inside
8702 the declarator should be applied to the declaration.
8704 When this function is called, scoping variables (such as
8705 CURRENT_CLASS_TYPE) should reflect the scope in which the
8706 declaration occurs, not the scope in which the new declaration will
8707 be placed. For example, on:
8711 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8714 Returns a DECL (if a declarator is present), a TYPE (if there is no
8715 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8719 grokdeclarator (const cp_declarator
*declarator
,
8720 cp_decl_specifier_seq
*declspecs
,
8721 enum decl_context decl_context
,
8725 tree type
= NULL_TREE
;
8727 int explicit_int128
= 0;
8728 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8729 int explicit_int
= 0;
8730 int explicit_char
= 0;
8731 int defaulted_int
= 0;
8733 tree typedef_decl
= NULL_TREE
;
8734 const char *name
= NULL
;
8735 tree typedef_type
= NULL_TREE
;
8736 /* True if this declarator is a function definition. */
8737 bool funcdef_flag
= false;
8738 cp_declarator_kind innermost_code
= cdk_error
;
8741 /* See the code below that used this. */
8742 tree decl_attr
= NULL_TREE
;
8745 /* Keep track of what sort of function is being processed
8746 so that we can warn about default return values, or explicit
8747 return values which do not match prescribed defaults. */
8748 special_function_kind sfk
= sfk_none
;
8750 tree dname
= NULL_TREE
;
8751 tree ctor_return_type
= NULL_TREE
;
8752 enum overload_flags flags
= NO_SPECIAL
;
8753 /* cv-qualifiers that apply to the declarator, for a declaration of
8754 a member function. */
8755 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8756 /* virt-specifiers that apply to the declarator, for a declaration of
8757 a member function. */
8758 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8759 /* ref-qualifier that applies to the declarator, for a declaration of
8760 a member function. */
8761 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8762 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8764 tree raises
= NULL_TREE
;
8765 int template_count
= 0;
8766 tree returned_attrs
= NULL_TREE
;
8767 tree parms
= NULL_TREE
;
8768 const cp_declarator
*id_declarator
;
8769 /* The unqualified name of the declarator; either an
8770 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8771 tree unqualified_id
;
8772 /* The class type, if any, in which this entity is located,
8773 or NULL_TREE if none. Note that this value may be different from
8774 the current class type; for example if an attempt is made to declare
8775 "A::f" inside "B", this value will be "A". */
8776 tree ctype
= current_class_type
;
8777 /* The NAMESPACE_DECL for the namespace in which this entity is
8778 located. If an unqualified name is used to declare the entity,
8779 this value will be NULL_TREE, even if the entity is located at
8781 tree in_namespace
= NULL_TREE
;
8782 cp_storage_class storage_class
;
8783 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8784 bool type_was_error_mark_node
= false;
8785 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8786 bool template_type_arg
= false;
8787 bool template_parm_flag
= false;
8788 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8789 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8790 source_location saved_loc
= input_location
;
8793 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8794 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8795 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8796 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8797 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8798 explicit_int128
= declspecs
->explicit_int128_p
;
8799 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8801 // Was concept_p specified? Note that ds_concept
8802 // implies ds_constexpr!
8803 bool concept_p
= decl_spec_seq_has_spec_p (declspecs
, ds_concept
);
8807 if (decl_context
== FUNCDEF
)
8808 funcdef_flag
= true, decl_context
= NORMAL
;
8809 else if (decl_context
== MEMFUNCDEF
)
8810 funcdef_flag
= true, decl_context
= FIELD
;
8811 else if (decl_context
== BITFIELD
)
8812 bitfield
= 1, decl_context
= FIELD
;
8813 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8814 template_type_arg
= true, decl_context
= TYPENAME
;
8815 else if (decl_context
== TPARM
)
8816 template_parm_flag
= true, decl_context
= PARM
;
8818 if (initialized
> 1)
8819 funcdef_flag
= true;
8821 /* Look inside a declarator for the name being declared
8822 and get it as a string, for an error message. */
8823 for (id_declarator
= declarator
;
8825 id_declarator
= id_declarator
->declarator
)
8827 if (id_declarator
->kind
!= cdk_id
)
8828 innermost_code
= id_declarator
->kind
;
8830 switch (id_declarator
->kind
)
8833 if (id_declarator
->declarator
8834 && id_declarator
->declarator
->kind
== cdk_id
)
8836 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8837 if (sfk
== sfk_destructor
)
8844 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8845 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8848 if (qualifying_scope
)
8850 if (at_function_scope_p ())
8854 A declarator-id shall not be qualified except
8857 None of the cases are permitted in block
8859 if (qualifying_scope
== global_namespace
)
8860 error ("invalid use of qualified-name %<::%D%>",
8862 else if (TYPE_P (qualifying_scope
))
8863 error ("invalid use of qualified-name %<%T::%D%>",
8864 qualifying_scope
, decl
);
8866 error ("invalid use of qualified-name %<%D::%D%>",
8867 qualifying_scope
, decl
);
8868 return error_mark_node
;
8870 else if (TYPE_P (qualifying_scope
))
8872 ctype
= qualifying_scope
;
8873 if (!MAYBE_CLASS_TYPE_P (ctype
))
8875 error ("%q#T is not a class or a namespace", ctype
);
8878 else if (innermost_code
!= cdk_function
8879 && current_class_type
8880 && !uniquely_derived_from_p (ctype
,
8881 current_class_type
))
8883 error ("type %qT is not derived from type %qT",
8884 ctype
, current_class_type
);
8885 return error_mark_node
;
8888 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8889 in_namespace
= qualifying_scope
;
8891 switch (TREE_CODE (decl
))
8897 if (innermost_code
!= cdk_function
)
8899 error ("declaration of %qD as non-function", decl
);
8900 return error_mark_node
;
8902 else if (!qualifying_scope
8903 && !(current_class_type
&& at_class_scope_p ()))
8905 error ("declaration of %qD as non-member", decl
);
8906 return error_mark_node
;
8909 type
= TREE_OPERAND (decl
, 0);
8911 type
= constructor_name (type
);
8912 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8917 case TEMPLATE_ID_EXPR
:
8919 tree fns
= TREE_OPERAND (decl
, 0);
8922 if (!identifier_p (dname
))
8924 gcc_assert (is_overloaded_fn (dname
));
8925 dname
= DECL_NAME (get_first_fn (dname
));
8930 case IDENTIFIER_NODE
:
8931 if (identifier_p (decl
))
8934 if (C_IS_RESERVED_WORD (dname
))
8936 error ("declarator-id missing; using reserved word %qD",
8938 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8940 else if (!IDENTIFIER_TYPENAME_P (dname
))
8941 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8944 gcc_assert (flags
== NO_SPECIAL
);
8945 flags
= TYPENAME_FLAG
;
8946 ctor_return_type
= TREE_TYPE (dname
);
8947 sfk
= sfk_conversion
;
8948 if (is_typename_at_global_scope (dname
))
8949 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8951 name
= "<invalid operator>";
8968 return error_mark_node
;
8973 if (id_declarator
->kind
== cdk_id
)
8979 The declarator in a function-definition shall have the form
8980 D1 ( parameter-declaration-clause) ... */
8981 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8983 error ("function definition does not declare parameters");
8984 return error_mark_node
;
8987 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8988 && innermost_code
!= cdk_function
8989 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8991 error ("declaration of %qD as non-function", dname
);
8992 return error_mark_node
;
8996 && identifier_p (dname
)
8997 && UDLIT_OPER_P (dname
)
8998 && innermost_code
!= cdk_function
)
9000 error ("declaration of %qD as non-function", dname
);
9001 return error_mark_node
;
9004 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9008 error ("declaration of %qD as %<typedef%>", dname
);
9009 return error_mark_node
;
9011 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9013 error ("declaration of %qD as parameter", dname
);
9014 return error_mark_node
;
9018 /* Anything declared one level down from the top level
9019 must be one of the parameters of a function
9020 (because the body is at least two levels down). */
9022 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9023 by not allowing C++ class definitions to specify their parameters
9024 with xdecls (must be spec.d in the parmlist).
9026 Since we now wait to push a class scope until we are sure that
9027 we are in a legitimate method context, we must set oldcname
9028 explicitly (since current_class_name is not yet alive).
9030 We also want to avoid calling this a PARM if it is in a namespace. */
9032 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9034 cp_binding_level
*b
= current_binding_level
;
9035 current_binding_level
= b
->level_chain
;
9036 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9037 decl_context
= PARM
;
9038 current_binding_level
= b
;
9042 name
= decl_context
== PARM
? "parameter" : "type name";
9044 if (constexpr_p
&& typedef_p
)
9046 error ("%<constexpr%> cannot appear in a typedef declaration");
9047 return error_mark_node
;
9050 /* If there were multiple types specified in the decl-specifier-seq,
9051 issue an error message. */
9052 if (declspecs
->multiple_types_p
)
9054 error ("two or more data types in declaration of %qs", name
);
9055 return error_mark_node
;
9058 if (declspecs
->conflicting_specifiers_p
)
9060 error ("conflicting specifiers in declaration of %qs", name
);
9061 return error_mark_node
;
9064 /* Extract the basic type from the decl-specifier-seq. */
9065 type
= declspecs
->type
;
9066 if (type
== error_mark_node
)
9069 type_was_error_mark_node
= true;
9071 /* If the entire declaration is itself tagged as deprecated then
9072 suppress reports of deprecated items. */
9073 if (type
&& TREE_DEPRECATED (type
)
9074 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9075 warn_deprecated_use (type
, NULL_TREE
);
9076 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9078 typedef_decl
= type
;
9079 type
= TREE_TYPE (typedef_decl
);
9080 if (TREE_DEPRECATED (type
)
9081 && DECL_ARTIFICIAL (typedef_decl
)
9082 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9083 warn_deprecated_use (type
, NULL_TREE
);
9085 /* No type at all: default to `int', and set DEFAULTED_INT
9086 because it was not a user-defined typedef. */
9087 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9089 /* These imply 'int'. */
9090 type
= integer_type_node
;
9094 explicit_int
= declspecs
->explicit_int_p
;
9095 explicit_char
= declspecs
->explicit_char_p
;
9098 /* See the code below that used this. */
9100 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9102 typedef_type
= type
;
9105 if (sfk
!= sfk_conversion
)
9106 ctor_return_type
= ctype
;
9108 if (sfk
!= sfk_none
)
9109 type
= check_special_function_return_type (sfk
, type
,
9111 else if (type
== NULL_TREE
)
9117 /* We handle `main' specially here, because 'main () { }' is so
9118 common. With no options, it is allowed. With -Wreturn-type,
9119 it is a warning. It is only an error with -pedantic-errors. */
9120 is_main
= (funcdef_flag
9121 && dname
&& identifier_p (dname
)
9122 && MAIN_NAME_P (dname
)
9123 && ctype
== NULL_TREE
9124 && in_namespace
== NULL_TREE
9125 && current_namespace
== global_namespace
);
9127 if (type_was_error_mark_node
)
9128 /* We've already issued an error, don't complain more. */;
9129 else if (in_system_header
|| flag_ms_extensions
)
9130 /* Allow it, sigh. */;
9132 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9134 pedwarn (input_location
, OPT_Wpedantic
,
9135 "ISO C++ forbids declaration of %qs with no type", name
);
9137 warning (OPT_Wreturn_type
,
9138 "ISO C++ forbids declaration of %qs with no type", name
);
9140 type
= integer_type_node
;
9145 if (explicit_int128
)
9147 if (int128_integer_type_node
== NULL_TREE
)
9149 error ("%<__int128%> is not supported by this target");
9150 explicit_int128
= false;
9152 else if (pedantic
&& ! in_system_header
)
9153 pedwarn (input_location
, OPT_Wpedantic
,
9154 "ISO C++ does not support %<__int128%> for %qs", name
);
9157 /* Now process the modifiers that were specified
9158 and check for invalid combinations. */
9160 /* Long double is a special combination. */
9161 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9164 type
= cp_build_qualified_type (long_double_type_node
,
9165 cp_type_quals (type
));
9168 /* Check all other uses of type modifiers. */
9170 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9174 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9175 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9176 else if (signed_p
&& unsigned_p
)
9177 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9178 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9179 error ("%<long long%> invalid for %qs", name
);
9180 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9181 error ("%<long%> invalid for %qs", name
);
9182 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9183 error ("%<short%> invalid for %qs", name
);
9184 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9185 error ("%<long%> or %<short%> invalid for %qs", name
);
9186 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9187 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9188 else if ((long_p
|| short_p
) && explicit_char
)
9189 error ("%<long%> or %<short%> specified with char for %qs", name
);
9190 else if (long_p
&& short_p
)
9191 error ("%<long%> and %<short%> specified together for %qs", name
);
9192 else if (type
== char16_type_node
|| type
== char32_type_node
)
9194 if (signed_p
|| unsigned_p
)
9195 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9196 else if (short_p
|| long_p
)
9197 error ("%<short%> or %<long%> invalid for %qs", name
);
9202 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9204 pedwarn (input_location
, OPT_Wpedantic
,
9205 "long, short, signed or unsigned used invalidly for %qs",
9207 if (flag_pedantic_errors
)
9212 /* Discard the type modifiers if they are invalid. */
9223 /* Decide whether an integer type is signed or not.
9224 Optionally treat bitfields as signed by default. */
9228 It is implementation-defined whether a plain (neither
9229 explicitly signed or unsigned) char, short, int, or long
9230 bit-field is signed or unsigned.
9232 Naturally, we extend this to long long as well. Note that
9233 this does not include wchar_t. */
9234 || (bitfield
&& !flag_signed_bitfields
9236 /* A typedef for plain `int' without `signed' can be
9237 controlled just like plain `int', but a typedef for
9238 `signed int' cannot be so controlled. */
9240 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9241 && TREE_CODE (type
) == INTEGER_TYPE
9242 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9244 if (explicit_int128
)
9245 type
= int128_unsigned_type_node
;
9247 type
= long_long_unsigned_type_node
;
9249 type
= long_unsigned_type_node
;
9251 type
= short_unsigned_type_node
;
9252 else if (type
== char_type_node
)
9253 type
= unsigned_char_type_node
;
9254 else if (typedef_decl
)
9255 type
= unsigned_type_for (type
);
9257 type
= unsigned_type_node
;
9259 else if (signed_p
&& type
== char_type_node
)
9260 type
= signed_char_type_node
;
9261 else if (explicit_int128
)
9262 type
= int128_integer_type_node
;
9264 type
= long_long_integer_type_node
;
9266 type
= long_integer_type_node
;
9268 type
= short_integer_type_node
;
9270 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9272 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9273 error ("complex invalid for %qs", name
);
9274 /* If we just have "complex", it is equivalent to
9275 "complex double", but if any modifiers at all are specified it is
9276 the complex form of TYPE. E.g, "complex short" is
9277 "complex short int". */
9278 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9279 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9280 type
= complex_double_type_node
;
9281 else if (type
== integer_type_node
)
9282 type
= complex_integer_type_node
;
9283 else if (type
== float_type_node
)
9284 type
= complex_float_type_node
;
9285 else if (type
== double_type_node
)
9286 type
= complex_double_type_node
;
9287 else if (type
== long_double_type_node
)
9288 type
= complex_long_double_type_node
;
9290 type
= build_complex_type (type
);
9293 type_quals
= TYPE_UNQUALIFIED
;
9294 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9295 type_quals
|= TYPE_QUAL_CONST
;
9296 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9297 type_quals
|= TYPE_QUAL_VOLATILE
;
9298 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9299 type_quals
|= TYPE_QUAL_RESTRICT
;
9300 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9301 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9304 /* If we're using the injected-class-name to form a compound type or a
9305 declaration, replace it with the underlying class so we don't get
9306 redundant typedefs in the debug output. But if we are returning the
9307 type unchanged, leave it alone so that it's available to
9308 maybe_get_template_decl_from_type_decl. */
9309 if (CLASS_TYPE_P (type
)
9310 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9311 && type
== TREE_TYPE (TYPE_NAME (type
))
9312 && (declarator
|| type_quals
))
9313 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9315 type_quals
|= cp_type_quals (type
);
9316 type
= cp_build_qualified_type_real
9317 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9318 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9319 /* We might have ignored or rejected some of the qualifiers. */
9320 type_quals
= cp_type_quals (type
);
9323 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9324 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9325 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9327 storage_class
= declspecs
->storage_class
;
9328 if (storage_class
== sc_static
)
9329 staticp
= 1 + (decl_context
== FIELD
);
9331 if (virtualp
&& staticp
== 2)
9333 error ("member %qD cannot be declared both virtual and static", dname
);
9334 storage_class
= sc_none
;
9337 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9339 /* Issue errors about use of storage classes for parameters. */
9340 if (decl_context
== PARM
)
9344 error ("typedef declaration invalid in parameter declaration");
9345 return error_mark_node
;
9347 else if (template_parm_flag
&& storage_class
!= sc_none
)
9349 error ("storage class specified for template parameter %qs", name
);
9350 return error_mark_node
;
9352 else if (storage_class
== sc_static
9353 || storage_class
== sc_extern
9355 error ("storage class specifiers invalid in parameter declarations");
9357 /* Function parameters cannot be constexpr. If we saw one, moan
9358 and pretend it wasn't there. */
9361 error ("a parameter cannot be declared %<constexpr%>");
9366 /* Give error if `virtual' is used outside of class declaration. */
9368 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9370 error ("%<virtual%> outside class declaration");
9374 /* Static anonymous unions are dealt with here. */
9375 if (staticp
&& decl_context
== TYPENAME
9377 && ANON_AGGR_TYPE_P (declspecs
->type
))
9378 decl_context
= FIELD
;
9380 /* Warn about storage classes that are invalid for certain
9381 kinds of declarations (parameters, typenames, etc.). */
9384 && storage_class
!= sc_extern
9385 && storage_class
!= sc_static
)
9388 error ("multiple storage classes in declaration of %qs", name
);
9391 if (decl_context
!= NORMAL
9392 && ((storage_class
!= sc_none
9393 && storage_class
!= sc_mutable
)
9396 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9397 && (storage_class
== sc_register
9398 || storage_class
== sc_auto
))
9402 else if (decl_context
== FIELD
9403 /* C++ allows static class elements. */
9404 && storage_class
== sc_static
)
9405 /* C++ also allows inlines and signed and unsigned elements,
9406 but in those cases we don't come in here. */
9410 if (decl_context
== FIELD
)
9411 error ("storage class specified for %qs", name
);
9414 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9415 error ("storage class specified for parameter %qs", name
);
9417 error ("storage class specified for typename");
9419 if (storage_class
== sc_register
9420 || storage_class
== sc_auto
9421 || storage_class
== sc_extern
9423 storage_class
= sc_none
;
9426 else if (storage_class
== sc_extern
&& funcdef_flag
9427 && ! toplevel_bindings_p ())
9428 error ("nested function %qs declared %<extern%>", name
);
9429 else if (toplevel_bindings_p ())
9431 if (storage_class
== sc_auto
)
9432 error ("top-level declaration of %qs specifies %<auto%>", name
);
9435 && storage_class
!= sc_extern
9436 && storage_class
!= sc_static
)
9438 if (declspecs
->gnu_thread_keyword_p
)
9439 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9440 "declared %<__thread%>", name
);
9442 /* When thread_local is applied to a variable of block scope the
9443 storage-class-specifier static is implied if it does not appear
9445 storage_class
= declspecs
->storage_class
= sc_static
;
9449 if (storage_class
&& friendp
)
9451 error ("storage class specifiers invalid in friend function declarations");
9452 storage_class
= sc_none
;
9457 unqualified_id
= NULL_TREE
;
9460 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9461 switch (TREE_CODE (unqualified_id
))
9464 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9465 if (TYPE_P (unqualified_id
))
9466 unqualified_id
= constructor_name (unqualified_id
);
9469 case IDENTIFIER_NODE
:
9470 case TEMPLATE_ID_EXPR
:
9478 if (declspecs
->std_attributes
)
9480 /* Apply the c++11 attributes to the type preceding them. */
9481 input_location
= declspecs
->locations
[ds_std_attribute
];
9482 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9483 input_location
= saved_loc
;
9486 /* Determine the type of the entity declared by recurring on the
9488 for (; declarator
; declarator
= declarator
->declarator
)
9490 const cp_declarator
*inner_declarator
;
9493 if (type
== error_mark_node
)
9494 return error_mark_node
;
9496 attrs
= declarator
->attributes
;
9502 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9503 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9504 if (declarator
->kind
== cdk_function
)
9505 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9506 if (declarator
->kind
== cdk_array
)
9507 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9508 returned_attrs
= decl_attributes (&type
,
9509 chainon (returned_attrs
, attrs
),
9513 if (declarator
->kind
== cdk_id
)
9516 inner_declarator
= declarator
->declarator
;
9518 switch (declarator
->kind
)
9521 type
= create_array_type_for_decl (dname
, type
,
9522 declarator
->u
.array
.bounds
);
9523 if (declarator
->std_attributes
)
9526 The optional attribute-specifier-seq appertains to the
9528 returned_attrs
= chainon (returned_attrs
,
9529 declarator
->std_attributes
);
9537 /* Declaring a function type.
9538 Make sure we have a valid type for the function to return. */
9540 if (type_quals
!= TYPE_UNQUALIFIED
)
9542 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9543 warning (OPT_Wignored_qualifiers
,
9544 "type qualifiers ignored on function return type");
9545 /* We now know that the TYPE_QUALS don't apply to the
9546 decl, but to its return type. */
9547 type_quals
= TYPE_UNQUALIFIED
;
9549 errmsg
= targetm
.invalid_return_type (type
);
9553 type
= integer_type_node
;
9556 /* Error about some types functions can't return. */
9558 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9560 error ("%qs declared as function returning a function", name
);
9561 return error_mark_node
;
9563 if (TREE_CODE (type
) == ARRAY_TYPE
)
9565 error ("%qs declared as function returning an array", name
);
9566 return error_mark_node
;
9569 input_location
= declspecs
->locations
[ds_type_spec
];
9570 abstract_virtuals_error (ACU_RETURN
, type
);
9571 input_location
= saved_loc
;
9573 /* Pick up type qualifiers which should be applied to `this'. */
9574 memfn_quals
= declarator
->u
.function
.qualifiers
;
9575 /* Pick up virt-specifiers. */
9576 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9577 /* And ref-qualifier, too */
9578 rqual
= declarator
->u
.function
.ref_qualifier
;
9579 /* Pick up the exception specifications. */
9580 raises
= declarator
->u
.function
.exception_specification
;
9581 /* If the exception-specification is ill-formed, let's pretend
9582 there wasn't one. */
9583 if (raises
== error_mark_node
)
9586 /* Say it's a definition only for the CALL_EXPR
9587 closest to the identifier. */
9588 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9590 /* Handle a late-specified return type. */
9593 if (type_uses_auto (type
))
9595 if (!declarator
->u
.function
.late_return_type
)
9597 if (current_class_type
9598 && LAMBDA_TYPE_P (current_class_type
))
9599 /* OK for C++11 lambdas. */;
9600 else if (cxx_dialect
< cxx1y
)
9601 pedwarn (input_location
, 0, "%qs function uses "
9602 "%<auto%> type specifier without trailing "
9603 "return type", name
);
9605 permerror (input_location
, "virtual function cannot "
9606 "have deduced return type");
9608 else if (!is_auto (type
))
9610 error ("%qs function with trailing return type has"
9611 " %qT as its type rather than plain %<auto%>",
9613 return error_mark_node
;
9616 else if (declarator
->u
.function
.late_return_type
)
9618 if (cxx_dialect
< cxx0x
)
9619 /* Not using maybe_warn_cpp0x because this should
9620 always be an error. */
9621 error ("trailing return type only available with "
9622 "-std=c++11 or -std=gnu++11");
9624 error ("%qs function with trailing return type not "
9625 "declared with %<auto%> type specifier", name
);
9626 return error_mark_node
;
9629 type
= splice_late_return_type
9630 (type
, declarator
->u
.function
.late_return_type
);
9631 if (type
== error_mark_node
)
9632 return error_mark_node
;
9634 if (ctype
== NULL_TREE
9635 && decl_context
== FIELD
9637 && (friendp
== 0 || dname
== current_class_name
))
9638 ctype
= current_class_type
;
9640 if (ctype
&& (sfk
== sfk_constructor
9641 || sfk
== sfk_destructor
))
9643 /* We are within a class's scope. If our declarator name
9644 is the same as the class name, and we are defining
9645 a function, then it is a constructor/destructor, and
9646 therefore returns a void type. */
9648 /* ISO C++ 12.4/2. A destructor may not be declared
9649 const or volatile. A destructor may not be static.
9650 A destructor may not be declared with ref-qualifier.
9652 ISO C++ 12.1. A constructor may not be declared
9653 const or volatile. A constructor may not be
9654 virtual. A constructor may not be static.
9655 A constructor may not be declared with ref-qualifier. */
9657 error ((flags
== DTOR_FLAG
)
9658 ? G_("destructor cannot be static member function")
9659 : G_("constructor cannot be static member function"));
9662 error ((flags
== DTOR_FLAG
)
9663 ? G_("destructors may not be cv-qualified")
9664 : G_("constructors may not be cv-qualified"));
9665 memfn_quals
= TYPE_UNQUALIFIED
;
9670 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9671 error ((flags
== DTOR_FLAG
)
9672 ? "destructors may not be ref-qualified"
9673 : "constructors may not be ref-qualified");
9674 rqual
= REF_QUAL_NONE
;
9677 if (decl_context
== FIELD
9678 && !member_function_or_else (ctype
,
9681 return error_mark_node
;
9683 if (flags
!= DTOR_FLAG
)
9685 /* It's a constructor. */
9690 permerror (input_location
, "constructors cannot be declared virtual");
9693 if (decl_context
== FIELD
9694 && sfk
!= sfk_constructor
)
9695 return error_mark_node
;
9697 if (decl_context
== FIELD
)
9703 error ("can%'t initialize friend function %qs", name
);
9706 /* Cannot be both friend and virtual. */
9707 error ("virtual functions cannot be friends");
9710 if (decl_context
== NORMAL
)
9711 error ("friend declaration not in class definition");
9712 if (current_function_decl
&& funcdef_flag
)
9713 error ("can%'t define friend function %qs in a local "
9717 else if (ctype
&& sfk
== sfk_conversion
)
9721 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9726 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9729 if (inner_declarator
9730 && inner_declarator
->kind
== cdk_id
9731 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9732 && arg_types
!= void_list_node
)
9734 error ("destructors may not have parameters");
9735 arg_types
= void_list_node
;
9739 type
= build_function_type (type
, arg_types
);
9740 if (declarator
->std_attributes
)
9743 The optional attribute-specifier-seq appertains to
9744 the function type. */
9745 decl_attributes (&type
, declarator
->std_attributes
,
9753 /* Filter out pointers-to-references and references-to-references.
9754 We can get these if a TYPE_DECL is used. */
9756 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9758 if (declarator
->kind
!= cdk_reference
)
9760 error ("cannot declare pointer to %q#T", type
);
9761 type
= TREE_TYPE (type
);
9764 /* In C++0x, we allow reference to reference declarations
9765 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9766 and template type arguments [14.3.1/4 temp.arg.type]. The
9767 check for direct reference to reference declarations, which
9768 are still forbidden, occurs below. Reasoning behind the change
9769 can be found in DR106, DR540, and the rvalue reference
9771 else if (cxx_dialect
== cxx98
)
9773 error ("cannot declare reference to %q#T", type
);
9774 type
= TREE_TYPE (type
);
9777 else if (VOID_TYPE_P (type
))
9779 if (declarator
->kind
== cdk_reference
)
9780 error ("cannot declare reference to %q#T", type
);
9781 else if (declarator
->kind
== cdk_ptrmem
)
9782 error ("cannot declare pointer to %q#T member", type
);
9785 /* We now know that the TYPE_QUALS don't apply to the decl,
9786 but to the target of the pointer. */
9787 type_quals
= TYPE_UNQUALIFIED
;
9789 /* This code used to handle METHOD_TYPE, but I don't think it's
9790 possible to get it here anymore. */
9791 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9792 if (declarator
->kind
== cdk_ptrmem
9793 && TREE_CODE (type
) == FUNCTION_TYPE
)
9795 memfn_quals
|= type_memfn_quals (type
);
9796 type
= build_memfn_type (type
,
9797 declarator
->u
.pointer
.class_type
,
9800 if (type
== error_mark_node
)
9801 return error_mark_node
;
9803 rqual
= REF_QUAL_NONE
;
9804 memfn_quals
= TYPE_UNQUALIFIED
;
9807 if (TREE_CODE (type
) == FUNCTION_TYPE
9808 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9809 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9810 error (declarator
->kind
== cdk_reference
9811 ? G_("cannot declare reference to qualified function type %qT")
9812 : G_("cannot declare pointer to qualified function type %qT"),
9815 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
9816 pedwarn (input_location
, OPT_Wvla
,
9817 declarator
->kind
== cdk_reference
9818 ? G_("reference to array of runtime bound")
9819 : G_("pointer to array of runtime bound"));
9821 /* When the pointed-to type involves components of variable size,
9822 care must be taken to ensure that the size evaluation code is
9823 emitted early enough to dominate all the possible later uses
9824 and late enough for the variables on which it depends to have
9827 This is expected to happen automatically when the pointed-to
9828 type has a name/declaration of it's own, but special attention
9829 is required if the type is anonymous.
9831 We handle the NORMAL and FIELD contexts here by inserting a
9832 dummy statement that just evaluates the size at a safe point
9833 and ensures it is not deferred until e.g. within a deeper
9834 conditional context (c++/43555).
9836 We expect nothing to be needed here for PARM or TYPENAME.
9837 Evaluating the size at this point for TYPENAME would
9838 actually be incorrect, as we might be in the middle of an
9839 expression with side effects on the pointed-to type size
9840 "arguments" prior to the pointer declaration point and the
9841 size evaluation could end up prior to the side effects. */
9843 if (!TYPE_NAME (type
)
9844 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9845 && at_function_scope_p ()
9846 && variably_modified_type_p (type
, NULL_TREE
))
9848 /* First break out any side-effects. */
9849 stabilize_vla_size (TYPE_SIZE (type
));
9850 /* And then force evaluation of the SAVE_EXPR. */
9851 finish_expr_stmt (TYPE_SIZE (type
));
9854 if (declarator
->kind
== cdk_reference
)
9856 /* In C++0x, the type we are creating a reference to might be
9857 a typedef which is itself a reference type. In that case,
9858 we follow the reference collapsing rules in
9859 [7.1.3/8 dcl.typedef] to create the final reference type:
9861 "If a typedef TD names a type that is a reference to a type
9862 T, an attempt to create the type 'lvalue reference to cv TD'
9863 creates the type 'lvalue reference to T,' while an attempt
9864 to create the type "rvalue reference to cv TD' creates the
9867 if (VOID_TYPE_P (type
))
9868 /* We already gave an error. */;
9869 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9871 if (declarator
->u
.reference
.rvalue_ref
)
9872 /* Leave type alone. */;
9874 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9877 type
= cp_build_reference_type
9878 (type
, declarator
->u
.reference
.rvalue_ref
);
9880 /* In C++0x, we need this check for direct reference to
9881 reference declarations, which are forbidden by
9882 [8.3.2/5 dcl.ref]. Reference to reference declarations
9883 are only allowed indirectly through typedefs and template
9884 type arguments. Example:
9886 void foo(int & &); // invalid ref-to-ref decl
9888 typedef int & int_ref;
9889 void foo(int_ref &); // valid ref-to-ref decl
9891 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9892 error ("cannot declare reference to %q#T, which is not "
9893 "a typedef or a template type argument", type
);
9895 else if (TREE_CODE (type
) == METHOD_TYPE
)
9896 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9897 else if (declarator
->kind
== cdk_ptrmem
)
9899 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9901 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9902 /* We will already have complained. */
9903 type
= error_mark_node
;
9905 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9909 type
= build_pointer_type (type
);
9911 /* Process a list of type modifier keywords (such as
9912 const or volatile) that were given inside the `*' or `&'. */
9914 if (declarator
->u
.pointer
.qualifiers
)
9917 = cp_build_qualified_type (type
,
9918 declarator
->u
.pointer
.qualifiers
);
9919 type_quals
= cp_type_quals (type
);
9922 /* Apply C++11 attributes to the pointer, and not to the
9923 type pointed to. This is unlike what is done for GNU
9924 attributes above. It is to comply with [dcl.ptr]/1:
9926 [the optional attribute-specifier-seq (7.6.1) appertains
9927 to the pointer and not to the object pointed to]. */
9928 if (declarator
->std_attributes
)
9929 decl_attributes (&type
, declarator
->std_attributes
,
9943 /* We need to stabilize side-effects in VLA sizes for regular array
9944 declarations too, not just pointers to arrays. */
9945 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9946 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9947 && at_function_scope_p ()
9948 && variably_modified_type_p (type
, NULL_TREE
))
9949 stabilize_vla_size (TYPE_SIZE (type
));
9951 /* A `constexpr' specifier used in an object declaration declares
9952 the object as `const'. */
9953 if (constexpr_p
&& innermost_code
!= cdk_function
)
9955 if (type_quals
& TYPE_QUAL_VOLATILE
)
9956 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9957 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9959 type_quals
|= TYPE_QUAL_CONST
;
9960 type
= cp_build_qualified_type (type
, type_quals
);
9964 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9965 && TREE_CODE (type
) != FUNCTION_TYPE
9966 && TREE_CODE (type
) != METHOD_TYPE
)
9968 error ("template-id %qD used as a declarator",
9970 unqualified_id
= dname
;
9973 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9974 qualified with a class-name, turn it into a METHOD_TYPE, unless
9975 we know that the function is static. We take advantage of this
9976 opportunity to do other processing that pertains to entities
9977 explicitly declared to be class members. Note that if DECLARATOR
9978 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9979 would not have exited the loop above. */
9981 && declarator
->u
.id
.qualifying_scope
9982 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9984 ctype
= declarator
->u
.id
.qualifying_scope
;
9985 ctype
= TYPE_MAIN_VARIANT (ctype
);
9986 template_count
= num_template_headers_for_class (ctype
);
9988 if (ctype
== current_class_type
)
9992 permerror (input_location
, "member functions are implicitly friends of their class");
9996 permerror (declarator
->id_loc
,
9997 "extra qualification %<%T::%> on member %qs",
10000 else if (/* If the qualifying type is already complete, then we
10001 can skip the following checks. */
10002 !COMPLETE_TYPE_P (ctype
)
10003 && (/* If the function is being defined, then
10004 qualifying type must certainly be complete. */
10006 /* A friend declaration of "T::f" is OK, even if
10007 "T" is a template parameter. But, if this
10008 function is not a friend, the qualifying type
10009 must be a class. */
10010 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10011 /* For a declaration, the type need not be
10012 complete, if either it is dependent (since there
10013 is no meaningful definition of complete in that
10014 case) or the qualifying class is currently being
10016 || !(dependent_type_p (ctype
)
10017 || currently_open_class (ctype
)))
10018 /* Check that the qualifying type is complete. */
10019 && !complete_type_or_else (ctype
, NULL_TREE
))
10020 return error_mark_node
;
10021 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10023 if (current_class_type
10024 && (!friendp
|| funcdef_flag
))
10026 error (funcdef_flag
10027 ? G_("cannot define member function %<%T::%s%> "
10029 : G_("cannot declare member function %<%T::%s%> "
10031 ctype
, name
, current_class_type
);
10032 return error_mark_node
;
10035 else if (typedef_p
&& current_class_type
)
10037 error ("cannot declare member %<%T::%s%> within %qT",
10038 ctype
, name
, current_class_type
);
10039 return error_mark_node
;
10043 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10044 ctype
= current_class_type
;
10046 /* Now TYPE has the actual type. */
10048 if (returned_attrs
)
10051 *attrlist
= chainon (returned_attrs
, *attrlist
);
10053 attrlist
= &returned_attrs
;
10057 && declarator
->kind
== cdk_id
10058 && declarator
->std_attributes
)
10059 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10060 a declarator-id appertains to the entity that is declared. */
10061 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10063 /* Handle parameter packs. */
10064 if (parameter_pack_p
)
10066 if (decl_context
== PARM
)
10067 /* Turn the type into a pack expansion.*/
10068 type
= make_pack_expansion (type
);
10070 error ("non-parameter %qs cannot be a parameter pack", name
);
10073 /* Did array size calculations overflow or does the array cover more
10074 than half of the address-space? */
10075 if (TREE_CODE (type
) == ARRAY_TYPE
10076 && COMPLETE_TYPE_P (type
)
10077 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10078 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10080 error ("size of array %qs is too large", name
);
10081 /* If we proceed with the array type as it is, we'll eventually
10082 crash in tree_low_cst(). */
10083 type
= error_mark_node
;
10086 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10087 && !processing_template_decl
10088 && variably_modified_type_p (type
, NULL_TREE
))
10090 if (decl_context
== FIELD
)
10091 error ("data member may not have variably modified type %qT", type
);
10093 error ("parameter may not have variably modified type %qT", type
);
10094 type
= error_mark_node
;
10097 if (explicitp
== 1 || (explicitp
&& friendp
))
10099 /* [dcl.fct.spec] The explicit specifier shall only be used in
10100 declarations of constructors within a class definition. */
10101 error ("only declarations of constructors can be %<explicit%>");
10105 if (storage_class
== sc_mutable
)
10107 if (decl_context
!= FIELD
|| friendp
)
10109 error ("non-member %qs cannot be declared %<mutable%>", name
);
10110 storage_class
= sc_none
;
10112 else if (decl_context
== TYPENAME
|| typedef_p
)
10114 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10115 storage_class
= sc_none
;
10117 else if (TREE_CODE (type
) == FUNCTION_TYPE
10118 || TREE_CODE (type
) == METHOD_TYPE
)
10120 error ("function %qs cannot be declared %<mutable%>", name
);
10121 storage_class
= sc_none
;
10125 error ("static %qs cannot be declared %<mutable%>", name
);
10126 storage_class
= sc_none
;
10128 else if (type_quals
& TYPE_QUAL_CONST
)
10130 error ("const %qs cannot be declared %<mutable%>", name
);
10131 storage_class
= sc_none
;
10133 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10135 permerror (input_location
, "reference %qs cannot be declared "
10136 "%<mutable%>", name
);
10137 storage_class
= sc_none
;
10141 /* If this is declaring a typedef name, return a TYPE_DECL. */
10142 if (typedef_p
&& decl_context
!= TYPENAME
)
10146 /* Note that the grammar rejects storage classes
10147 in typenames, fields or parameters. */
10148 if (current_lang_name
== lang_name_java
)
10149 TYPE_FOR_JAVA (type
) = 1;
10151 /* This declaration:
10153 typedef void f(int) const;
10155 declares a function type which is not a member of any
10156 particular class, but which is cv-qualified; for
10157 example "f S::*" declares a pointer to a const-qualified
10158 member function of S. We record the cv-qualification in the
10160 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10162 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10164 /* We have now dealt with these qualifiers. */
10165 memfn_quals
= TYPE_UNQUALIFIED
;
10166 rqual
= REF_QUAL_NONE
;
10169 if (type_uses_auto (type
))
10171 error ("typedef declared %<auto%>");
10172 type
= error_mark_node
;
10175 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
10176 pedwarn (input_location
, OPT_Wvla
,
10177 "typedef naming array of runtime bound");
10179 if (decl_context
== FIELD
)
10180 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10182 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10183 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10184 error_at (DECL_SOURCE_LOCATION (decl
),
10185 "typedef name may not be a nested-name-specifier");
10186 TREE_TYPE (decl
) = error_mark_node
;
10189 if (decl_context
!= FIELD
)
10191 if (!current_function_decl
)
10192 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10193 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10194 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10195 (current_function_decl
)))
10196 /* The TYPE_DECL is "abstract" because there will be
10197 clones of this constructor/destructor, and there will
10198 be copies of this TYPE_DECL generated in those
10200 DECL_ABSTRACT (decl
) = 1;
10202 else if (current_class_type
10203 && constructor_name_p (unqualified_id
, current_class_type
))
10204 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10205 "as enclosing class",
10208 /* If the user declares "typedef struct {...} foo" then the
10209 struct will have an anonymous name. Fill that name in now.
10210 Nothing can refer to it, so nothing needs know about the name
10212 if (type
!= error_mark_node
10214 && TYPE_NAME (type
)
10215 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10216 && TYPE_ANONYMOUS_P (type
)
10217 && declspecs
->type_definition_p
10218 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10222 /* Replace the anonymous name with the real name everywhere. */
10223 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10225 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10226 /* We do not rename the debug info representing the
10227 anonymous tagged type because the standard says in
10228 [dcl.typedef] that the naming applies only for
10229 linkage purposes. */
10230 /*debug_hooks->set_name (t, decl);*/
10231 TYPE_NAME (t
) = decl
;
10234 if (TYPE_LANG_SPECIFIC (type
))
10235 TYPE_WAS_ANONYMOUS (type
) = 1;
10237 /* If this is a typedef within a template class, the nested
10238 type is a (non-primary) template. The name for the
10239 template needs updating as well. */
10240 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10241 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10242 = TYPE_IDENTIFIER (type
);
10244 /* Adjust linkage now that we aren't anonymous anymore. */
10245 reset_type_linkage (type
);
10247 /* FIXME remangle member functions; member functions of a
10248 type with external linkage have external linkage. */
10252 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10253 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10255 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10256 memfn_quals
!= TYPE_UNQUALIFIED
,
10257 inlinep
, friendp
, raises
!= NULL_TREE
);
10259 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10260 /* Acknowledge that this was written:
10261 `using analias = atype;'. */
10262 TYPE_DECL_ALIAS_P (decl
) = 1;
10267 /* Detect the case of an array type of unspecified size
10268 which came, as such, direct from a typedef name.
10269 We must copy the type, so that the array's domain can be
10270 individually set by the object's initializer. */
10272 if (type
&& typedef_type
10273 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10274 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10275 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10277 /* Detect where we're using a typedef of function type to declare a
10278 function. PARMS will not be set, so we must create it now. */
10280 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10282 tree decls
= NULL_TREE
;
10285 for (args
= TYPE_ARG_TYPES (type
);
10286 args
&& args
!= void_list_node
;
10287 args
= TREE_CHAIN (args
))
10289 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10291 DECL_CHAIN (decl
) = decls
;
10295 parms
= nreverse (decls
);
10297 if (decl_context
!= TYPENAME
)
10299 /* A cv-qualifier-seq shall only be part of the function type
10300 for a non-static member function. A ref-qualifier shall only
10301 .... /same as above/ [dcl.fct] */
10302 if ((type_memfn_quals (type
) != TYPE_UNQUALIFIED
10303 || type_memfn_rqual (type
) != REF_QUAL_NONE
)
10304 && (current_class_type
== NULL_TREE
|| staticp
) )
10307 ? G_("qualified function types cannot be used to "
10308 "declare static member functions")
10309 : G_("qualified function types cannot be used to "
10310 "declare free functions"));
10311 type
= TYPE_MAIN_VARIANT (type
);
10314 /* The qualifiers on the function type become the qualifiers on
10315 the non-static member function. */
10316 memfn_quals
|= type_memfn_quals (type
);
10317 rqual
= type_memfn_rqual (type
);
10318 type_quals
= TYPE_UNQUALIFIED
;
10322 /* If this is a type name (such as, in a cast or sizeof),
10323 compute the type and return it now. */
10325 if (decl_context
== TYPENAME
)
10327 /* Note that the grammar rejects storage classes
10328 in typenames, fields or parameters. */
10329 if (type_quals
!= TYPE_UNQUALIFIED
)
10330 type_quals
= TYPE_UNQUALIFIED
;
10332 /* Special case: "friend class foo" looks like a TYPENAME context. */
10335 if (type_quals
!= TYPE_UNQUALIFIED
)
10337 error ("type qualifiers specified for friend class declaration");
10338 type_quals
= TYPE_UNQUALIFIED
;
10342 error ("%<inline%> specified for friend class declaration");
10348 /* Don't allow friend declaration without a class-key. */
10349 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10350 permerror (input_location
, "template parameters cannot be friends");
10351 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10352 permerror (input_location
, "friend declaration requires class-key, "
10353 "i.e. %<friend class %T::%D%>",
10354 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10356 permerror (input_location
, "friend declaration requires class-key, "
10357 "i.e. %<friend %#T%>",
10361 /* Only try to do this stuff if we didn't already give up. */
10362 if (type
!= integer_type_node
)
10364 /* A friendly class? */
10365 if (current_class_type
)
10366 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10367 /*complain=*/true);
10369 error ("trying to make class %qT a friend of global scope",
10372 type
= void_type_node
;
10375 else if (memfn_quals
|| rqual
)
10377 if (ctype
== NULL_TREE
10378 && TREE_CODE (type
) == METHOD_TYPE
)
10379 ctype
= TYPE_METHOD_BASETYPE (type
);
10382 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10383 /* Core issue #547: need to allow this in template type args.
10384 Allow it in general in C++11 for alias-declarations. */
10385 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10386 && TREE_CODE (type
) == FUNCTION_TYPE
)
10387 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10389 error ("invalid qualifiers on non-member function type");
10394 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10395 && decl_context
!= CATCHPARM
10396 && TREE_CODE (type
) != UNION_TYPE
10399 error ("abstract declarator %qT used as declaration", type
);
10400 return error_mark_node
;
10403 /* Only functions may be declared using an operator-function-id. */
10405 && IDENTIFIER_OPNAME_P (unqualified_id
)
10406 && TREE_CODE (type
) != FUNCTION_TYPE
10407 && TREE_CODE (type
) != METHOD_TYPE
)
10409 error ("declaration of %qD as non-function", unqualified_id
);
10410 return error_mark_node
;
10413 /* We don't check parameter types here because we can emit a better
10414 error message later. */
10415 if (decl_context
!= PARM
)
10417 type
= check_var_type (unqualified_id
, type
);
10418 if (type
== error_mark_node
)
10419 return error_mark_node
;
10422 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10423 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10425 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10427 if (ctype
|| in_namespace
)
10428 error ("cannot use %<::%> in parameter declaration");
10430 if (type_uses_auto (type
))
10432 error ("parameter declared %<auto%>");
10433 type
= error_mark_node
;
10436 /* A parameter declared as an array of T is really a pointer to T.
10437 One declared as a function is really a pointer to a function.
10438 One declared as a member is really a pointer to member. */
10440 if (TREE_CODE (type
) == ARRAY_TYPE
)
10442 /* Transfer const-ness of array into that of type pointed to. */
10443 type
= build_pointer_type (TREE_TYPE (type
));
10444 type_quals
= TYPE_UNQUALIFIED
;
10446 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10447 type
= build_pointer_type (type
);
10450 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10451 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10453 cp_cv_quals real_quals
= memfn_quals
;
10454 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10455 real_quals
|= TYPE_QUAL_CONST
;
10456 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10462 if (decl_context
== PARM
)
10464 decl
= cp_build_parm_decl (unqualified_id
, type
);
10466 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10467 memfn_quals
!= TYPE_UNQUALIFIED
,
10468 inlinep
, friendp
, raises
!= NULL_TREE
);
10470 else if (decl_context
== FIELD
)
10472 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10473 && type_uses_auto (type
))
10475 error ("non-static data member declared %<auto%>");
10476 type
= error_mark_node
;
10479 /* The C99 flexible array extension. */
10480 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10481 && TYPE_DOMAIN (type
) == NULL_TREE
)
10483 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10484 tf_warning_or_error
);
10485 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10488 if (type
== error_mark_node
)
10490 /* Happens when declaring arrays of sizes which
10491 are error_mark_node, for example. */
10494 else if (in_namespace
&& !friendp
)
10496 /* Something like struct S { int N::j; }; */
10497 error ("invalid use of %<::%>");
10498 return error_mark_node
;
10500 else if (TREE_CODE (type
) == FUNCTION_TYPE
10501 || TREE_CODE (type
) == METHOD_TYPE
)
10504 tree function_context
;
10508 /* This should never happen in pure C++ (the check
10509 could be an assert). It could happen in
10510 Objective-C++ if someone writes invalid code that
10511 uses a function declaration for an instance
10512 variable or property (instance variables and
10513 properties are parsed as FIELD_DECLs, but they are
10514 part of an Objective-C class, not a C++ class).
10515 That code is invalid and is caught by this
10519 error ("declaration of function %qD in invalid context",
10521 return error_mark_node
;
10524 /* ``A union may [ ... ] not [ have ] virtual functions.''
10526 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10528 error ("function %qD declared virtual inside a union",
10530 return error_mark_node
;
10533 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10537 error ("%qD cannot be declared virtual, since it "
10538 "is always static",
10545 /* Check that the name used for a destructor makes sense. */
10546 if (sfk
== sfk_destructor
)
10548 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10552 gcc_assert (friendp
);
10553 error ("expected qualified name in friend declaration "
10554 "for destructor %qD", uqname
);
10555 return error_mark_node
;
10558 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10560 error ("declaration of %qD as member of %qT",
10562 return error_mark_node
;
10566 error ("a destructor cannot be %<constexpr%>");
10567 return error_mark_node
;
10570 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10572 error ("expected qualified name in friend declaration "
10573 "for constructor %qD",
10574 id_declarator
->u
.id
.unqualified_name
);
10575 return error_mark_node
;
10578 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10579 function_context
= (ctype
!= NULL_TREE
) ?
10580 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10581 publicp
= (! friendp
|| ! staticp
)
10582 && function_context
== NULL_TREE
;
10583 decl
= grokfndecl (ctype
, type
,
10584 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10585 ? unqualified_id
: dname
,
10588 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10589 friendp
? -1 : 0, friendp
, publicp
,
10590 inlinep
| (2 * constexpr_p
),
10592 funcdef_flag
, template_count
, in_namespace
,
10593 attrlist
, declarator
->id_loc
);
10594 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10595 if (decl
== NULL_TREE
)
10596 return error_mark_node
;
10598 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10599 /* The decl and setting of decl_attr is also turned off. */
10600 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10603 /* [class.conv.ctor]
10605 A constructor declared without the function-specifier
10606 explicit that can be called with a single parameter
10607 specifies a conversion from the type of its first
10608 parameter to the type of its class. Such a constructor
10609 is called a converting constructor. */
10610 if (explicitp
== 2)
10611 DECL_NONCONVERTING_P (decl
) = 1;
10613 else if (!staticp
&& !dependent_type_p (type
)
10614 && !COMPLETE_TYPE_P (complete_type (type
))
10615 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10617 if (unqualified_id
)
10618 error ("field %qD has incomplete type %qT",
10619 unqualified_id
, type
);
10621 error ("name %qT has incomplete type", type
);
10623 type
= error_mark_node
;
10630 error ("%qE is neither function nor member function; "
10631 "cannot be declared friend", unqualified_id
);
10639 /* Friends are treated specially. */
10640 if (ctype
== current_class_type
)
10641 ; /* We already issued a permerror. */
10642 else if (decl
&& DECL_NAME (decl
))
10644 if (template_class_depth (current_class_type
) == 0)
10646 decl
= check_explicit_specialization
10647 (unqualified_id
, decl
, template_count
,
10648 2 * funcdef_flag
+ 4);
10649 if (decl
== error_mark_node
)
10650 return error_mark_node
;
10653 decl
= do_friend (ctype
, unqualified_id
, decl
,
10659 return error_mark_node
;
10662 /* Structure field. It may not be a function, except for C++. */
10664 if (decl
== NULL_TREE
)
10668 /* C++ allows static class members. All other work
10669 for this is done by grokfield. */
10670 decl
= build_lang_decl_loc (declarator
->id_loc
,
10671 VAR_DECL
, unqualified_id
, type
);
10672 set_linkage_for_static_data_member (decl
);
10673 /* Even if there is an in-class initialization, DECL
10674 is considered undefined until an out-of-class
10675 definition is provided. */
10676 DECL_EXTERNAL (decl
) = 1;
10680 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10681 if (declspecs
->gnu_thread_keyword_p
)
10682 DECL_GNU_TLS_P (decl
) = true;
10685 if (constexpr_p
&& !initialized
)
10687 error ("constexpr static data member %qD must have an "
10688 "initializer", decl
);
10689 constexpr_p
= false;
10696 error ("non-static data member %qE declared %<constexpr%>",
10698 constexpr_p
= false;
10700 decl
= build_decl (input_location
,
10701 FIELD_DECL
, unqualified_id
, type
);
10702 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10703 if (bitfield
&& !unqualified_id
)
10704 TREE_NO_WARNING (decl
) = 1;
10706 if (storage_class
== sc_mutable
)
10708 DECL_MUTABLE_P (decl
) = 1;
10709 storage_class
= sc_none
;
10714 /* An attempt is being made to initialize a non-static
10715 member. This is new in C++11. */
10716 maybe_warn_cpp0x (CPP0X_NSDMI
);
10718 /* If this has been parsed with static storage class, but
10719 errors forced staticp to be cleared, ensure NSDMI is
10721 if (declspecs
->storage_class
== sc_static
)
10722 DECL_INITIAL (decl
) = error_mark_node
;
10726 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10727 memfn_quals
!= TYPE_UNQUALIFIED
,
10728 inlinep
, friendp
, raises
!= NULL_TREE
);
10731 else if (TREE_CODE (type
) == FUNCTION_TYPE
10732 || TREE_CODE (type
) == METHOD_TYPE
)
10734 tree original_name
;
10737 if (!unqualified_id
)
10738 return error_mark_node
;
10740 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10741 original_name
= dname
;
10743 original_name
= unqualified_id
;
10745 if (storage_class
== sc_auto
)
10746 error ("storage class %<auto%> invalid for function %qs", name
);
10747 else if (storage_class
== sc_register
)
10748 error ("storage class %<register%> invalid for function %qs", name
);
10751 if (declspecs
->gnu_thread_keyword_p
)
10752 error ("storage class %<__thread%> invalid for function %qs",
10755 error ("storage class %<thread_local%> invalid for function %qs",
10759 if (virt_specifiers
)
10760 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10761 /* Function declaration not at top level.
10762 Storage classes other than `extern' are not allowed
10763 and `extern' makes no difference. */
10764 if (! toplevel_bindings_p ()
10765 && (storage_class
== sc_static
10766 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10769 if (storage_class
== sc_static
)
10770 pedwarn (input_location
, OPT_Wpedantic
,
10771 "%<static%> specified invalid for function %qs "
10772 "declared out of global scope", name
);
10774 pedwarn (input_location
, OPT_Wpedantic
,
10775 "%<inline%> specifier invalid for function %qs "
10776 "declared out of global scope", name
);
10779 if (ctype
== NULL_TREE
)
10783 error ("virtual non-class function %qs", name
);
10786 else if (sfk
== sfk_constructor
10787 || sfk
== sfk_destructor
)
10789 error (funcdef_flag
10790 ? G_("%qs defined in a non-class scope")
10791 : G_("%qs declared in a non-class scope"), name
);
10796 /* Record whether the function is public. */
10797 publicp
= (ctype
!= NULL_TREE
10798 || storage_class
!= sc_static
);
10800 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10801 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10804 inlinep
| (2 * constexpr_p
) | (4 * concept_p
),
10807 template_count
, in_namespace
, attrlist
,
10808 declarator
->id_loc
);
10809 if (decl
== NULL_TREE
)
10810 return error_mark_node
;
10814 int invalid_static
= 0;
10816 /* Don't allow a static member function in a class, and forbid
10817 declaring main to be static. */
10818 if (TREE_CODE (type
) == METHOD_TYPE
)
10820 permerror (input_location
, "cannot declare member function %qD to have "
10821 "static linkage", decl
);
10822 invalid_static
= 1;
10824 else if (current_function_decl
)
10826 /* FIXME need arm citation */
10827 error ("cannot declare static function inside another function");
10828 invalid_static
= 1;
10831 if (invalid_static
)
10834 storage_class
= sc_none
;
10840 /* It's a variable. */
10842 /* An uninitialized decl with `extern' is a reference. */
10843 decl
= grokvardecl (type
, unqualified_id
,
10846 (type_quals
& TYPE_QUAL_CONST
) != 0,
10847 ctype
? ctype
: in_namespace
);
10848 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10849 memfn_quals
!= TYPE_UNQUALIFIED
,
10850 inlinep
, friendp
, raises
!= NULL_TREE
);
10854 DECL_CONTEXT (decl
) = ctype
;
10857 permerror (input_location
, "%<static%> may not be used when defining "
10858 "(as opposed to declaring) a static data member");
10860 storage_class
= sc_none
;
10862 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10864 error ("static member %qD declared %<register%>", decl
);
10865 storage_class
= sc_none
;
10867 if (storage_class
== sc_extern
&& pedantic
)
10869 pedwarn (input_location
, OPT_Wpedantic
,
10870 "cannot explicitly declare member %q#D to have "
10871 "extern linkage", decl
);
10872 storage_class
= sc_none
;
10875 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10877 error ("declaration of constexpr variable %qD is not a definition",
10879 constexpr_p
= false;
10883 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10885 if (toplevel_bindings_p ())
10887 /* It's common practice (and completely valid) to have a const
10888 be initialized and declared extern. */
10889 if (!(type_quals
& TYPE_QUAL_CONST
))
10890 warning (0, "%qs initialized and declared %<extern%>", name
);
10894 error ("%qs has both %<extern%> and initializer", name
);
10895 return error_mark_node
;
10899 /* Record `register' declaration for warnings on &
10900 and in case doing stupid register allocation. */
10902 if (storage_class
== sc_register
)
10903 DECL_REGISTER (decl
) = 1;
10904 else if (storage_class
== sc_extern
)
10905 DECL_THIS_EXTERN (decl
) = 1;
10906 else if (storage_class
== sc_static
)
10907 DECL_THIS_STATIC (decl
) = 1;
10909 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10910 if (constexpr_p
&& VAR_P (decl
))
10911 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10913 /* Record constancy and volatility on the DECL itself . There's
10914 no need to do this when processing a template; we'll do this
10915 for the instantiated declaration based on the type of DECL. */
10916 if (!processing_template_decl
)
10917 cp_apply_type_quals_to_decl (type_quals
, decl
);
10923 /* Subroutine of start_function. Ensure that each of the parameter
10924 types (as listed in PARMS) is complete, as is required for a
10925 function definition. */
10928 require_complete_types_for_parms (tree parms
)
10930 for (; parms
; parms
= DECL_CHAIN (parms
))
10932 if (dependent_type_p (TREE_TYPE (parms
)))
10934 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10935 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10937 relayout_decl (parms
);
10938 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10941 /* grokparms or complete_type_or_else will have already issued
10943 TREE_TYPE (parms
) = error_mark_node
;
10947 /* Returns nonzero if T is a local variable. */
10950 local_variable_p (const_tree t
)
10953 /* A VAR_DECL with a context that is a _TYPE is a static data
10955 && !TYPE_P (CP_DECL_CONTEXT (t
))
10956 /* Any other non-local variable must be at namespace scope. */
10957 && !DECL_NAMESPACE_SCOPE_P (t
))
10958 || (TREE_CODE (t
) == PARM_DECL
))
10964 /* Like local_variable_p, but suitable for use as a tree-walking
10968 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10971 if (local_variable_p (*tp
)
10972 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
10974 else if (TYPE_P (*tp
))
10975 *walk_subtrees
= 0;
10980 /* Check that ARG, which is a default-argument expression for a
10981 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10982 something goes wrong. DECL may also be a _TYPE node, rather than a
10983 DECL, if there is no DECL available. */
10986 check_default_argument (tree decl
, tree arg
)
10991 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10992 /* We get a DEFAULT_ARG when looking at an in-class declaration
10993 with a default argument. Ignore the argument for now; we'll
10994 deal with it after the class is complete. */
11003 decl_type
= TREE_TYPE (decl
);
11005 if (arg
== error_mark_node
11006 || decl
== error_mark_node
11007 || TREE_TYPE (arg
) == error_mark_node
11008 || decl_type
== error_mark_node
)
11009 /* Something already went wrong. There's no need to check
11011 return error_mark_node
;
11013 /* [dcl.fct.default]
11015 A default argument expression is implicitly converted to the
11017 ++cp_unevaluated_operand
;
11018 perform_implicit_conversion_flags (decl_type
, arg
, tf_warning_or_error
,
11020 --cp_unevaluated_operand
;
11022 if (warn_zero_as_null_pointer_constant
11023 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11024 && null_ptr_cst_p (arg
)
11025 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11026 return nullptr_node
;
11028 /* [dcl.fct.default]
11030 Local variables shall not be used in default argument
11033 The keyword `this' shall not be used in a default argument of a
11034 member function. */
11035 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11038 if (DECL_NAME (var
) == this_identifier
)
11039 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
11041 error ("default argument %qE uses local variable %qD", arg
, var
);
11042 return error_mark_node
;
11049 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11052 type_is_deprecated (tree type
)
11054 enum tree_code code
;
11055 if (TREE_DEPRECATED (type
))
11057 if (TYPE_NAME (type
)
11058 && TREE_DEPRECATED (TYPE_NAME (type
)))
11061 /* Do warn about using typedefs to a deprecated class. */
11062 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11063 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11065 code
= TREE_CODE (type
);
11067 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11068 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11069 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11070 return type_is_deprecated (TREE_TYPE (type
));
11072 if (TYPE_PTRMEMFUNC_P (type
))
11073 return type_is_deprecated
11074 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11079 /* Decode the list of parameter types for a function type.
11080 Given the list of things declared inside the parens,
11081 return a list of types.
11083 If this parameter does not end with an ellipsis, we append
11086 *PARMS is set to the chain of PARM_DECLs created. */
11089 grokparms (tree parmlist
, tree
*parms
)
11091 tree result
= NULL_TREE
;
11092 tree decls
= NULL_TREE
;
11096 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11098 tree type
= NULL_TREE
;
11099 tree init
= TREE_PURPOSE (parm
);
11100 tree decl
= TREE_VALUE (parm
);
11101 const char *errmsg
;
11103 if (parm
== void_list_node
)
11106 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11109 type
= TREE_TYPE (decl
);
11110 if (VOID_TYPE_P (type
))
11112 if (same_type_p (type
, void_type_node
)
11113 && DECL_SELF_REFERENCE_P (type
)
11114 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11115 /* this is a parmlist of `(void)', which is ok. */
11117 cxx_incomplete_type_error (decl
, type
);
11118 /* It's not a good idea to actually create parameters of
11119 type `void'; other parts of the compiler assume that a
11120 void type terminates the parameter list. */
11121 type
= error_mark_node
;
11122 TREE_TYPE (decl
) = error_mark_node
;
11125 if (type
!= error_mark_node
11126 && TYPE_FOR_JAVA (type
)
11127 && MAYBE_CLASS_TYPE_P (type
))
11129 error ("parameter %qD has Java class type", decl
);
11130 type
= error_mark_node
;
11131 TREE_TYPE (decl
) = error_mark_node
;
11135 if (type
!= error_mark_node
11136 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11139 type
= error_mark_node
;
11140 TREE_TYPE (decl
) = error_mark_node
;
11143 if (type
!= error_mark_node
)
11145 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11147 tree deptype
= type_is_deprecated (type
);
11149 warn_deprecated_use (deptype
, NULL_TREE
);
11152 /* Top-level qualifiers on the parameters are
11153 ignored for function types. */
11154 type
= cp_build_qualified_type (type
, 0);
11155 if (TREE_CODE (type
) == METHOD_TYPE
)
11157 error ("parameter %qD invalidly declared method type", decl
);
11158 type
= build_pointer_type (type
);
11159 TREE_TYPE (decl
) = type
;
11161 else if (abstract_virtuals_error (decl
, type
))
11162 any_error
= 1; /* Seems like a good idea. */
11163 else if (POINTER_TYPE_P (type
))
11165 /* [dcl.fct]/6, parameter types cannot contain pointers
11166 (references) to arrays of unknown bound. */
11167 tree t
= TREE_TYPE (type
);
11168 int ptr
= TYPE_PTR_P (type
);
11172 if (TYPE_PTR_P (t
))
11174 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11176 else if (!TYPE_DOMAIN (t
))
11180 if (TREE_CODE (t
) == ARRAY_TYPE
)
11182 ? G_("parameter %qD includes pointer to array of "
11183 "unknown bound %qT")
11184 : G_("parameter %qD includes reference to array of "
11185 "unknown bound %qT"),
11191 else if (init
&& !processing_template_decl
)
11192 init
= check_default_argument (decl
, init
);
11195 DECL_CHAIN (decl
) = decls
;
11197 result
= tree_cons (init
, type
, result
);
11199 decls
= nreverse (decls
);
11200 result
= nreverse (result
);
11202 result
= chainon (result
, void_list_node
);
11209 /* D is a constructor or overloaded `operator='.
11211 Let T be the class in which D is declared. Then, this function
11214 -1 if D's is an ill-formed constructor or copy assignment operator
11215 whose first parameter is of type `T'.
11216 0 if D is not a copy constructor or copy assignment
11218 1 if D is a copy constructor or copy assignment operator whose
11219 first parameter is a reference to non-const qualified T.
11220 2 if D is a copy constructor or copy assignment operator whose
11221 first parameter is a reference to const qualified T.
11223 This function can be used as a predicate. Positive values indicate
11224 a copy constructor and nonzero values indicate a copy assignment
11228 copy_fn_p (const_tree d
)
11234 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11236 if (TREE_CODE (d
) == TEMPLATE_DECL
11237 || (DECL_TEMPLATE_INFO (d
)
11238 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11239 /* Instantiations of template member functions are never copy
11240 functions. Note that member functions of templated classes are
11241 represented as template functions internally, and we must
11242 accept those as copy functions. */
11245 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11249 arg_type
= TREE_VALUE (args
);
11250 if (arg_type
== error_mark_node
)
11253 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11255 /* Pass by value copy assignment operator. */
11258 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11259 && !TYPE_REF_IS_RVALUE (arg_type
)
11260 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11262 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11268 args
= TREE_CHAIN (args
);
11270 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11271 /* There are more non-optional args. */
11277 /* D is a constructor or overloaded `operator='.
11279 Let T be the class in which D is declared. Then, this function
11280 returns true when D is a move constructor or move assignment
11281 operator, false otherwise. */
11284 move_fn_p (const_tree d
)
11286 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11288 if (cxx_dialect
== cxx98
)
11289 /* There are no move constructors if we are in C++98 mode. */
11292 if (TREE_CODE (d
) == TEMPLATE_DECL
11293 || (DECL_TEMPLATE_INFO (d
)
11294 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11295 /* Instantiations of template member functions are never move
11296 functions. Note that member functions of templated classes are
11297 represented as template functions internally, and we must
11298 accept those as move functions. */
11301 return move_signature_fn_p (d
);
11304 /* D is a constructor or overloaded `operator='.
11306 Then, this function returns true when D has the same signature as a move
11307 constructor or move assignment operator (because either it is such a
11308 ctor/op= or it is a template specialization with the same signature),
11309 false otherwise. */
11312 move_signature_fn_p (const_tree d
)
11316 bool result
= false;
11318 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11322 arg_type
= TREE_VALUE (args
);
11323 if (arg_type
== error_mark_node
)
11326 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11327 && TYPE_REF_IS_RVALUE (arg_type
)
11328 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11332 args
= TREE_CHAIN (args
);
11334 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11335 /* There are more non-optional args. */
11341 /* Remember any special properties of member function DECL. */
11344 grok_special_member_properties (tree decl
)
11348 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11351 class_type
= DECL_CONTEXT (decl
);
11352 if (DECL_CONSTRUCTOR_P (decl
))
11354 int ctor
= copy_fn_p (decl
);
11356 if (!DECL_ARTIFICIAL (decl
))
11357 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11363 A non-template constructor for class X is a copy
11364 constructor if its first parameter is of type X&, const
11365 X&, volatile X& or const volatile X&, and either there
11366 are no other parameters or else all other parameters have
11367 default arguments. */
11368 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11369 if (user_provided_p (decl
))
11370 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11372 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11374 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11376 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11377 if (user_provided_p (decl
))
11378 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11380 else if (move_fn_p (decl
) && user_provided_p (decl
))
11381 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11382 else if (is_list_ctor (decl
))
11383 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11385 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11386 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11387 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11389 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11393 A non-template assignment operator for class X is a copy
11394 assignment operator if its parameter is of type X, X&, const
11395 X&, volatile X& or const volatile X&. */
11397 int assop
= copy_fn_p (decl
);
11401 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11402 if (user_provided_p (decl
))
11403 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11405 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11407 else if (move_fn_p (decl
) && user_provided_p (decl
))
11408 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11410 /* Destructors are handled in check_methods. */
11413 /* Check a constructor DECL has the correct form. Complains
11414 if the class has a constructor of the form X(X). */
11417 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11419 int ctor_parm
= copy_fn_p (decl
);
11425 A declaration of a constructor for a class X is ill-formed if
11426 its first parameter is of type (optionally cv-qualified) X
11427 and either there are no other parameters or else all other
11428 parameters have default arguments.
11430 We *don't* complain about member template instantiations that
11431 have this form, though; they can occur as we try to decide
11432 what constructor to use during overload resolution. Since
11433 overload resolution will never prefer such a constructor to
11434 the non-template copy constructor (which is either explicitly
11435 or implicitly defined), there's no need to worry about their
11436 existence. Theoretically, they should never even be
11437 instantiated, but that's hard to forestall. */
11438 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11446 /* An operator with this code is unary, but can also be binary. */
11449 ambi_op_p (enum tree_code code
)
11451 return (code
== INDIRECT_REF
11452 || code
== ADDR_EXPR
11453 || code
== UNARY_PLUS_EXPR
11454 || code
== NEGATE_EXPR
11455 || code
== PREINCREMENT_EXPR
11456 || code
== PREDECREMENT_EXPR
);
11459 /* An operator with this name can only be unary. */
11462 unary_op_p (enum tree_code code
)
11464 return (code
== TRUTH_NOT_EXPR
11465 || code
== BIT_NOT_EXPR
11466 || code
== COMPONENT_REF
11467 || code
== TYPE_EXPR
);
11470 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11471 errors are issued for invalid declarations. */
11474 grok_op_properties (tree decl
, bool complain
)
11476 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11478 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11479 tree name
= DECL_NAME (decl
);
11480 enum tree_code operator_code
;
11485 /* Count the number of arguments and check for ellipsis. */
11486 for (argtype
= argtypes
, arity
= 0;
11487 argtype
&& argtype
!= void_list_node
;
11488 argtype
= TREE_CHAIN (argtype
))
11490 ellipsis_p
= !argtype
;
11492 class_type
= DECL_CONTEXT (decl
);
11493 if (class_type
&& !CLASS_TYPE_P (class_type
))
11494 class_type
= NULL_TREE
;
11496 if (DECL_CONV_FN_P (decl
))
11497 operator_code
= TYPE_EXPR
;
11501 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11502 if (ansi_opname (CODE) == name) \
11504 operator_code = (CODE); \
11507 else if (ansi_assopname (CODE) == name) \
11509 operator_code = (CODE); \
11510 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11514 #include "operators.def"
11515 #undef DEF_OPERATOR
11517 gcc_unreachable ();
11520 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11521 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11524 switch (operator_code
)
11527 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11531 TYPE_GETS_DELETE (class_type
) |= 1;
11535 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11538 case VEC_DELETE_EXPR
:
11539 TYPE_GETS_DELETE (class_type
) |= 2;
11546 /* [basic.std.dynamic.allocation]/1:
11548 A program is ill-formed if an allocation function is declared
11549 in a namespace scope other than global scope or declared static
11552 The same also holds true for deallocation functions. */
11553 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11554 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11556 if (DECL_NAMESPACE_SCOPE_P (decl
))
11558 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11560 error ("%qD may not be declared within a namespace", decl
);
11563 else if (!TREE_PUBLIC (decl
))
11565 error ("%qD may not be declared as static", decl
);
11571 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11573 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11574 DECL_IS_OPERATOR_NEW (decl
) = 1;
11576 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11577 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11580 /* An operator function must either be a non-static member function
11581 or have at least one parameter of a class, a reference to a class,
11582 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11583 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11585 if (operator_code
== TYPE_EXPR
11586 || operator_code
== CALL_EXPR
11587 || operator_code
== COMPONENT_REF
11588 || operator_code
== ARRAY_REF
11589 || operator_code
== NOP_EXPR
)
11591 error ("%qD must be a nonstatic member function", decl
);
11598 if (DECL_STATIC_FUNCTION_P (decl
))
11600 error ("%qD must be either a non-static member "
11601 "function or a non-member function", decl
);
11605 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11607 tree arg
= non_reference (TREE_VALUE (p
));
11608 if (arg
== error_mark_node
)
11611 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11612 because these checks are performed even on
11613 template functions. */
11614 if (MAYBE_CLASS_TYPE_P (arg
)
11615 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11619 if (!p
|| p
== void_list_node
)
11622 error ("%qD must have an argument of class or "
11623 "enumerated type", decl
);
11629 /* There are no restrictions on the arguments to an overloaded
11631 if (operator_code
== CALL_EXPR
)
11634 /* Warn about conversion operators that will never be used. */
11635 if (IDENTIFIER_TYPENAME_P (name
)
11636 && ! DECL_TEMPLATE_INFO (decl
)
11638 /* Warn only declaring the function; there is no need to
11639 warn again about out-of-class definitions. */
11640 && class_type
== current_class_type
)
11642 tree t
= TREE_TYPE (name
);
11643 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11646 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11648 if (VOID_TYPE_P (t
))
11649 warning (OPT_Wconversion
,
11651 ? G_("conversion to a reference to void "
11652 "will never use a type conversion operator")
11653 : G_("conversion to void "
11654 "will never use a type conversion operator"));
11655 else if (class_type
)
11657 if (t
== class_type
)
11658 warning (OPT_Wconversion
,
11660 ? G_("conversion to a reference to the same type "
11661 "will never use a type conversion operator")
11662 : G_("conversion to the same type "
11663 "will never use a type conversion operator"));
11664 /* Don't force t to be complete here. */
11665 else if (MAYBE_CLASS_TYPE_P (t
)
11666 && COMPLETE_TYPE_P (t
)
11667 && DERIVED_FROM_P (t
, class_type
))
11668 warning (OPT_Wconversion
,
11670 ? G_("conversion to a reference to a base class "
11671 "will never use a type conversion operator")
11672 : G_("conversion to a base class "
11673 "will never use a type conversion operator"));
11678 if (operator_code
== COND_EXPR
)
11681 error ("ISO C++ prohibits overloading operator ?:");
11684 else if (ellipsis_p
)
11686 error ("%qD must not have variable number of arguments", decl
);
11689 else if (ambi_op_p (operator_code
))
11692 /* We pick the one-argument operator codes by default, so
11693 we don't have to change anything. */
11695 else if (arity
== 2)
11697 /* If we thought this was a unary operator, we now know
11698 it to be a binary operator. */
11699 switch (operator_code
)
11702 operator_code
= MULT_EXPR
;
11706 operator_code
= BIT_AND_EXPR
;
11709 case UNARY_PLUS_EXPR
:
11710 operator_code
= PLUS_EXPR
;
11714 operator_code
= MINUS_EXPR
;
11717 case PREINCREMENT_EXPR
:
11718 operator_code
= POSTINCREMENT_EXPR
;
11721 case PREDECREMENT_EXPR
:
11722 operator_code
= POSTDECREMENT_EXPR
;
11726 gcc_unreachable ();
11729 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11731 if ((operator_code
== POSTINCREMENT_EXPR
11732 || operator_code
== POSTDECREMENT_EXPR
)
11733 && ! processing_template_decl
11734 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11737 error ("postfix %qD must take %<int%> as its argument",
11740 error ("postfix %qD must take %<int%> as its second "
11748 error ("%qD must take either zero or one argument", decl
);
11750 error ("%qD must take either one or two arguments", decl
);
11754 /* More Effective C++ rule 6. */
11756 && (operator_code
== POSTINCREMENT_EXPR
11757 || operator_code
== POSTDECREMENT_EXPR
11758 || operator_code
== PREINCREMENT_EXPR
11759 || operator_code
== PREDECREMENT_EXPR
))
11761 tree arg
= TREE_VALUE (argtypes
);
11762 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11763 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11764 arg
= TREE_TYPE (arg
);
11765 arg
= TYPE_MAIN_VARIANT (arg
);
11766 if (operator_code
== PREINCREMENT_EXPR
11767 || operator_code
== PREDECREMENT_EXPR
)
11769 if (TREE_CODE (ret
) != REFERENCE_TYPE
11770 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11772 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11773 build_reference_type (arg
));
11777 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11778 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11782 else if (unary_op_p (operator_code
))
11787 error ("%qD must take %<void%>", decl
);
11789 error ("%qD must take exactly one argument", decl
);
11793 else /* if (binary_op_p (operator_code)) */
11798 error ("%qD must take exactly one argument", decl
);
11800 error ("%qD must take exactly two arguments", decl
);
11804 /* More Effective C++ rule 7. */
11806 && (operator_code
== TRUTH_ANDIF_EXPR
11807 || operator_code
== TRUTH_ORIF_EXPR
11808 || operator_code
== COMPOUND_EXPR
))
11809 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11813 /* Effective C++ rule 23. */
11816 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11817 && (operator_code
== PLUS_EXPR
11818 || operator_code
== MINUS_EXPR
11819 || operator_code
== TRUNC_DIV_EXPR
11820 || operator_code
== MULT_EXPR
11821 || operator_code
== TRUNC_MOD_EXPR
)
11822 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11823 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11825 /* [over.oper]/8 */
11826 for (; argtypes
&& argtypes
!= void_list_node
;
11827 argtypes
= TREE_CHAIN (argtypes
))
11828 if (TREE_PURPOSE (argtypes
))
11830 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11831 if (operator_code
== POSTINCREMENT_EXPR
11832 || operator_code
== POSTDECREMENT_EXPR
)
11834 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11839 error ("%qD cannot have default arguments", decl
);
11847 /* Return a string giving the keyword associate with CODE. */
11849 static const char *
11850 tag_name (enum tag_types code
)
11862 case typename_type
:
11865 gcc_unreachable ();
11869 /* Name lookup in an elaborated-type-specifier (after the keyword
11870 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11871 elaborated-type-specifier is invalid, issue a diagnostic and return
11872 error_mark_node; otherwise, return the *_TYPE to which it referred.
11873 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11876 check_elaborated_type_specifier (enum tag_types tag_code
,
11878 bool allow_template_p
)
11884 struct S { struct S *p; };
11886 name lookup will find the TYPE_DECL for the implicit "S::S"
11887 typedef. Adjust for that here. */
11888 if (DECL_SELF_REFERENCE_P (decl
))
11889 decl
= TYPE_NAME (TREE_TYPE (decl
));
11891 type
= TREE_TYPE (decl
);
11893 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11894 is false for this case as well. */
11895 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11897 error ("using template type parameter %qT after %qs",
11898 type
, tag_name (tag_code
));
11899 return error_mark_node
;
11901 /* Accept template template parameters. */
11902 else if (allow_template_p
11903 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11904 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11908 If the identifier resolves to a typedef-name or the
11909 simple-template-id resolves to an alias template
11910 specialization, the elaborated-type-specifier is ill-formed.
11912 In other words, the only legitimate declaration to use in the
11913 elaborated type specifier is the implicit typedef created when
11914 the type is declared. */
11915 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11916 && !DECL_SELF_REFERENCE_P (decl
)
11917 && tag_code
!= typename_type
)
11919 if (alias_template_specialization_p (type
))
11920 error ("using alias template specialization %qT after %qs",
11921 type
, tag_name (tag_code
));
11923 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11924 inform (DECL_SOURCE_LOCATION (decl
),
11925 "%qD has a previous declaration here", decl
);
11926 return error_mark_node
;
11928 else if (TREE_CODE (type
) != RECORD_TYPE
11929 && TREE_CODE (type
) != UNION_TYPE
11930 && tag_code
!= enum_type
11931 && tag_code
!= typename_type
)
11933 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11934 error ("%q+T has a previous declaration here", type
);
11935 return error_mark_node
;
11937 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11938 && tag_code
== enum_type
)
11940 error ("%qT referred to as enum", type
);
11941 error ("%q+T has a previous declaration here", type
);
11942 return error_mark_node
;
11944 else if (!allow_template_p
11945 && TREE_CODE (type
) == RECORD_TYPE
11946 && CLASSTYPE_IS_TEMPLATE (type
))
11948 /* If a class template appears as elaborated type specifier
11949 without a template header such as:
11951 template <class T> class C {};
11952 void f(class C); // No template header here
11954 then the required template argument is missing. */
11955 error ("template argument required for %<%s %T%>",
11956 tag_name (tag_code
),
11957 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11958 return error_mark_node
;
11964 /* Lookup NAME in elaborate type specifier in scope according to
11965 SCOPE and issue diagnostics if necessary.
11966 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11967 found, and ERROR_MARK_NODE for type error. */
11970 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11971 tag_scope scope
, bool template_header_p
)
11975 if (scope
== ts_global
)
11977 /* First try ordinary name lookup, ignoring hidden class name
11978 injected via friend declaration. */
11979 decl
= lookup_name_prefer_type (name
, 2);
11980 /* If that fails, the name will be placed in the smallest
11981 non-class, non-function-prototype scope according to 3.3.1/5.
11982 We may already have a hidden name declared as friend in this
11983 scope. So lookup again but not ignoring hidden names.
11984 If we find one, that name will be made visible rather than
11985 creating a new tag. */
11987 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11990 decl
= lookup_type_scope (name
, scope
);
11993 && (DECL_CLASS_TEMPLATE_P (decl
)
11994 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11995 decl
= DECL_TEMPLATE_RESULT (decl
);
11997 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11999 /* Look for invalid nested type:
12003 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12005 error ("%qD has the same name as the class in which it is "
12008 return error_mark_node
;
12011 /* Two cases we need to consider when deciding if a class
12012 template is allowed as an elaborated type specifier:
12013 1. It is a self reference to its own class.
12014 2. It comes with a template header.
12018 template <class T> class C {
12019 class C *c1; // DECL_SELF_REFERENCE_P is true
12022 template <class U> class C; // template_header_p is true
12023 template <class T> class C<T>::D {
12024 class C *c2; // DECL_SELF_REFERENCE_P is true
12027 t
= check_elaborated_type_specifier (tag_code
,
12030 | DECL_SELF_REFERENCE_P (decl
));
12033 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12035 error ("reference to %qD is ambiguous", name
);
12036 print_candidates (decl
);
12037 return error_mark_node
;
12043 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12044 Define the tag as a forward-reference if it is not defined.
12046 If a declaration is given, process it here, and report an error if
12047 multiple declarations are not identical.
12049 SCOPE is TS_CURRENT when this is also a definition. Only look in
12050 the current frame for the name (since C++ allows new names in any
12051 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12052 declaration. Only look beginning from the current scope outward up
12053 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12055 TEMPLATE_HEADER_P is true when this declaration is preceded by
12056 a set of template parameters. */
12059 xref_tag_1 (enum tag_types tag_code
, tree name
,
12060 tag_scope orig_scope
, bool template_header_p
)
12062 enum tree_code code
;
12064 tree context
= NULL_TREE
;
12067 gcc_assert (identifier_p (name
));
12073 code
= RECORD_TYPE
;
12079 code
= ENUMERAL_TYPE
;
12082 gcc_unreachable ();
12085 if (orig_scope
== ts_lambda
)
12086 scope
= ts_current
;
12088 scope
= orig_scope
;
12090 /* In case of anonymous name, xref_tag is only called to
12091 make type node and push name. Name lookup is not required. */
12092 if (ANON_AGGRNAME_P (name
))
12095 t
= lookup_and_check_tag (tag_code
, name
,
12096 scope
, template_header_p
);
12098 if (t
== error_mark_node
)
12099 return error_mark_node
;
12101 if (scope
!= ts_current
&& t
&& current_class_type
12102 && template_class_depth (current_class_type
)
12103 && template_header_p
)
12105 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12108 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12109 definition of this tag. Since, in addition, we are currently
12110 processing a (member) template declaration of a template
12111 class, we must be very careful; consider:
12118 { template <class V>
12119 friend struct S1; };
12121 Here, the S2::S1 declaration should not be confused with the
12122 outer declaration. In particular, the inner version should
12123 have a template parameter of level 2, not level 1. This
12124 would be particularly important if the member declaration
12127 template <class V = U> friend struct S1;
12129 say, when we should tsubst into `U' when instantiating
12130 S2. On the other hand, when presented with:
12140 we must find the inner binding eventually. We
12141 accomplish this by making sure that the new type we
12142 create to represent this declaration has the right
12144 context
= TYPE_CONTEXT (t
);
12150 /* If no such tag is yet defined, create a forward-reference node
12151 and record it as the "definition".
12152 When a real declaration of this type is found,
12153 the forward-reference will be altered into a real type. */
12154 if (code
== ENUMERAL_TYPE
)
12156 error ("use of enum %q#D without previous declaration", name
);
12157 return error_mark_node
;
12161 t
= make_class_type (code
);
12162 TYPE_CONTEXT (t
) = context
;
12163 if (orig_scope
== ts_lambda
)
12164 /* Remember that we're declaring a lambda to avoid bogus errors
12165 in push_template_decl. */
12166 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12167 t
= pushtag (name
, t
, scope
);
12172 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12174 if (!redeclare_class_template (t
,
12175 current_template_parms
,
12176 current_template_reqs
))
12177 return error_mark_node
;
12179 else if (!processing_template_decl
12180 && CLASS_TYPE_P (t
)
12181 && CLASSTYPE_IS_TEMPLATE (t
))
12183 error ("redeclaration of %qT as a non-template", t
);
12184 error ("previous declaration %q+D", t
);
12185 return error_mark_node
;
12188 /* Make injected friend class visible. */
12189 if (scope
!= ts_within_enclosing_non_class
12190 && hidden_name_p (TYPE_NAME (t
)))
12192 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12193 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12195 if (TYPE_TEMPLATE_INFO (t
))
12197 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12198 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12206 /* Wrapper for xref_tag_1. */
12209 xref_tag (enum tag_types tag_code
, tree name
,
12210 tag_scope scope
, bool template_header_p
)
12214 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12215 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12216 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12222 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12224 enum tag_types tag_kind
;
12226 if (TREE_CODE (old
) == RECORD_TYPE
)
12227 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12229 tag_kind
= union_type
;
12231 if (id
== NULL_TREE
)
12232 id
= TYPE_IDENTIFIER (old
);
12234 return xref_tag (tag_kind
, id
, scope
, false);
12237 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12238 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12239 access_* node, and the TREE_VALUE is the type of the base-class.
12240 Non-NULL TREE_TYPE indicates virtual inheritance.
12242 Returns true if the binfo hierarchy was successfully created,
12243 false if an error was detected. */
12246 xref_basetypes (tree ref
, tree base_list
)
12249 tree binfo
, base_binfo
;
12250 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12251 unsigned max_bases
= 0; /* Maximum direct bases. */
12253 tree default_access
;
12254 tree igo_prev
; /* Track Inheritance Graph Order. */
12256 if (ref
== error_mark_node
)
12259 /* The base of a derived class is private by default, all others are
12261 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12262 && CLASSTYPE_DECLARED_CLASS (ref
)
12263 ? access_private_node
: access_public_node
);
12265 /* First, make sure that any templates in base-classes are
12266 instantiated. This ensures that if we call ourselves recursively
12267 we do not get confused about which classes are marked and which
12269 basep
= &base_list
;
12272 tree basetype
= TREE_VALUE (*basep
);
12274 /* The dependent_type_p call below should really be dependent_scope_p
12275 so that we give a hard error about using an incomplete type as a
12276 base, but we allow it with a pedwarn for backward
12278 if (processing_template_decl
12279 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12280 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12281 if (!dependent_type_p (basetype
)
12282 && !complete_type_or_else (basetype
, NULL
))
12283 /* An incomplete type. Remove it from the list. */
12284 *basep
= TREE_CHAIN (*basep
);
12288 if (TREE_TYPE (*basep
))
12290 if (CLASS_TYPE_P (basetype
))
12291 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12292 basep
= &TREE_CHAIN (*basep
);
12296 TYPE_MARKED_P (ref
) = 1;
12298 /* The binfo slot should be empty, unless this is an (ill-formed)
12300 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12302 error ("redefinition of %q#T", ref
);
12306 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12308 binfo
= make_tree_binfo (max_bases
);
12310 TYPE_BINFO (ref
) = binfo
;
12311 BINFO_OFFSET (binfo
) = size_zero_node
;
12312 BINFO_TYPE (binfo
) = ref
;
12314 /* Apply base-class info set up to the variants of this type. */
12315 fixup_type_variants (ref
);
12319 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12320 /* An aggregate cannot have baseclasses. */
12321 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12323 if (TREE_CODE (ref
) == UNION_TYPE
)
12325 error ("derived union %qT invalid", ref
);
12332 if (TYPE_FOR_JAVA (ref
))
12334 error ("Java class %qT cannot have multiple bases", ref
);
12341 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12343 if (TYPE_FOR_JAVA (ref
))
12345 error ("Java class %qT cannot have virtual bases", ref
);
12350 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12352 tree access
= TREE_PURPOSE (base_list
);
12353 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12354 tree basetype
= TREE_VALUE (base_list
);
12356 if (access
== access_default_node
)
12357 access
= default_access
;
12359 if (PACK_EXPANSION_P (basetype
))
12360 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12361 if (TREE_CODE (basetype
) == TYPE_DECL
)
12362 basetype
= TREE_TYPE (basetype
);
12363 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12365 error ("base type %qT fails to be a struct or class type",
12370 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12371 TYPE_FOR_JAVA (ref
) = 1;
12373 base_binfo
= NULL_TREE
;
12374 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12376 base_binfo
= TYPE_BINFO (basetype
);
12377 /* The original basetype could have been a typedef'd type. */
12378 basetype
= BINFO_TYPE (base_binfo
);
12380 /* Inherit flags from the base. */
12381 TYPE_HAS_NEW_OPERATOR (ref
)
12382 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12383 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12384 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12385 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12386 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12387 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12388 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12389 CLASSTYPE_REPEATED_BASE_P (ref
)
12390 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12393 /* We must do this test after we've seen through a typedef
12395 if (TYPE_MARKED_P (basetype
))
12397 if (basetype
== ref
)
12398 error ("recursive type %qT undefined", basetype
);
12400 error ("duplicate base type %qT invalid", basetype
);
12404 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12405 /* Regenerate the pack expansion for the bases. */
12406 basetype
= make_pack_expansion (basetype
);
12408 TYPE_MARKED_P (basetype
) = 1;
12410 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12411 &igo_prev
, via_virtual
);
12412 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12413 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12415 BINFO_BASE_APPEND (binfo
, base_binfo
);
12416 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12419 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12420 /* If we didn't get max_vbases vbases, we must have shared at
12421 least one of them, and are therefore diamond shaped. */
12422 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12424 /* Unmark all the types. */
12425 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12426 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12427 TYPE_MARKED_P (ref
) = 0;
12429 /* Now see if we have a repeated base type. */
12430 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12432 for (base_binfo
= binfo
; base_binfo
;
12433 base_binfo
= TREE_CHAIN (base_binfo
))
12435 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12437 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12440 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12442 for (base_binfo
= binfo
; base_binfo
;
12443 base_binfo
= TREE_CHAIN (base_binfo
))
12444 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12445 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12454 /* Copies the enum-related properties from type SRC to type DST.
12455 Used with the underlying type of an enum and the enum itself. */
12457 copy_type_enum (tree dst
, tree src
)
12460 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12462 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12463 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12464 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12465 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12466 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12467 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12468 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12469 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12470 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12474 /* Begin compiling the definition of an enumeration type.
12477 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12479 UNDERLYING_TYPE is the type that will be used as the storage for
12480 the enumeration type. This should be NULL_TREE if no storage type
12483 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12485 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12487 Returns the type object, as yet incomplete.
12488 Also records info about it so that build_enumerator
12489 may be used to declare the individual values as they are read. */
12492 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12493 bool scoped_enum_p
, bool *is_new
)
12495 tree prevtype
= NULL_TREE
;
12496 gcc_assert (identifier_p (name
));
12500 /* [C++0x dcl.enum]p5:
12502 If not explicitly specified, the underlying type of a scoped
12503 enumeration type is int. */
12504 if (!underlying_type
&& scoped_enum_p
)
12505 underlying_type
= integer_type_node
;
12507 if (underlying_type
)
12508 underlying_type
= cv_unqualified (underlying_type
);
12510 /* If this is the real definition for a previous forward reference,
12511 fill in the contents in the same object that used to be the
12512 forward reference. */
12514 enumtype
= lookup_and_check_tag (enum_type
, name
,
12515 /*tag_scope=*/ts_current
,
12516 /*template_header_p=*/false);
12518 /* In case of a template_decl, the only check that should be deferred
12519 to instantiation time is the comparison of underlying types. */
12520 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12522 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12524 error_at (input_location
, "scoped/unscoped mismatch "
12525 "in enum %q#T", enumtype
);
12526 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12527 "previous definition here");
12528 enumtype
= error_mark_node
;
12530 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12532 error_at (input_location
, "underlying type mismatch "
12533 "in enum %q#T", enumtype
);
12534 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12535 "previous definition here");
12536 enumtype
= error_mark_node
;
12538 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12539 && !dependent_type_p (underlying_type
)
12540 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12541 && !same_type_p (underlying_type
,
12542 ENUM_UNDERLYING_TYPE (enumtype
)))
12544 error_at (input_location
, "different underlying type "
12545 "in enum %q#T", enumtype
);
12546 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12547 "previous definition here");
12548 underlying_type
= NULL_TREE
;
12552 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12553 || processing_template_decl
)
12555 /* In case of error, make a dummy enum to allow parsing to
12557 if (enumtype
== error_mark_node
)
12559 name
= make_anon_name ();
12560 enumtype
= NULL_TREE
;
12563 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12564 of an opaque enum, or an opaque enum of an already defined
12565 enumeration (C++0x only).
12566 In any other case, it'll be NULL_TREE. */
12572 prevtype
= enumtype
;
12574 /* Do not push the decl more than once, unless we need to
12575 compare underlying types at instantiation time */
12577 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12578 || (underlying_type
12579 && dependent_type_p (underlying_type
))
12580 || (ENUM_UNDERLYING_TYPE (enumtype
)
12581 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12583 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12584 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12587 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12590 if (enumtype
== error_mark_node
)
12591 return error_mark_node
;
12593 /* The enum is considered opaque until the opening '{' of the
12594 enumerator list. */
12595 SET_OPAQUE_ENUM_P (enumtype
, true);
12596 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12599 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12601 if (underlying_type
)
12603 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12605 copy_type_enum (enumtype
, underlying_type
);
12606 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12608 else if (dependent_type_p (underlying_type
))
12609 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12611 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12612 underlying_type
, enumtype
);
12615 /* If into a template class, the returned enum is always the first
12616 declaration (opaque or not) seen. This way all the references to
12617 this type will be to the same declaration. The following ones are used
12618 only to check for definition errors. */
12619 if (prevtype
&& processing_template_decl
)
12625 /* After processing and defining all the values of an enumeration type,
12626 install their decls in the enumeration type.
12627 ENUMTYPE is the type object. */
12630 finish_enum_value_list (tree enumtype
)
12633 tree underlying_type
;
12636 tree minnode
, maxnode
;
12639 bool fixed_underlying_type_p
12640 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12642 /* We built up the VALUES in reverse order. */
12643 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12645 /* For an enum defined in a template, just set the type of the values;
12646 all further processing is postponed until the template is
12647 instantiated. We need to set the type so that tsubst of a CONST_DECL
12649 if (processing_template_decl
)
12651 for (values
= TYPE_VALUES (enumtype
);
12653 values
= TREE_CHAIN (values
))
12654 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12658 /* Determine the minimum and maximum values of the enumerators. */
12659 if (TYPE_VALUES (enumtype
))
12661 minnode
= maxnode
= NULL_TREE
;
12663 for (values
= TYPE_VALUES (enumtype
);
12665 values
= TREE_CHAIN (values
))
12667 decl
= TREE_VALUE (values
);
12669 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12670 each enumerator has the type of its enumeration. Prior to the
12671 closing brace, the type of each enumerator is the type of its
12672 initializing value. */
12673 TREE_TYPE (decl
) = enumtype
;
12675 /* Update the minimum and maximum values, if appropriate. */
12676 value
= DECL_INITIAL (decl
);
12677 if (value
== error_mark_node
)
12678 value
= integer_zero_node
;
12679 /* Figure out what the minimum and maximum values of the
12680 enumerators are. */
12682 minnode
= maxnode
= value
;
12683 else if (tree_int_cst_lt (maxnode
, value
))
12685 else if (tree_int_cst_lt (value
, minnode
))
12692 If the enumerator-list is empty, the underlying type is as if
12693 the enumeration had a single enumerator with value 0. */
12694 minnode
= maxnode
= integer_zero_node
;
12696 if (!fixed_underlying_type_p
)
12698 /* Compute the number of bits require to represent all values of the
12699 enumeration. We must do this before the type of MINNODE and
12700 MAXNODE are transformed, since tree_int_cst_min_precision relies
12701 on the TREE_TYPE of the value it is passed. */
12702 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12703 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12704 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12705 int precision
= MAX (lowprec
, highprec
);
12707 bool use_short_enum
;
12709 /* Determine the underlying type of the enumeration.
12713 The underlying type of an enumeration is an integral type that
12714 can represent all the enumerator values defined in the
12715 enumeration. It is implementation-defined which integral type is
12716 used as the underlying type for an enumeration except that the
12717 underlying type shall not be larger than int unless the value of
12718 an enumerator cannot fit in an int or unsigned int.
12720 We use "int" or an "unsigned int" as the underlying type, even if
12721 a smaller integral type would work, unless the user has
12722 explicitly requested that we use the smallest possible type. The
12723 user can request that for all enumerations with a command line
12724 flag, or for just one enumeration with an attribute. */
12726 use_short_enum
= flag_short_enums
12727 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12729 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12733 underlying_type
= integer_types
[itk
];
12734 if (underlying_type
!= NULL_TREE
12735 && TYPE_PRECISION (underlying_type
) >= precision
12736 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12739 if (itk
== itk_none
)
12743 IF no integral type can represent all the enumerator values, the
12744 enumeration is ill-formed. */
12745 error ("no integral type can represent all of the enumerator values "
12746 "for %qT", enumtype
);
12747 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12748 underlying_type
= integer_types
[itk_unsigned_long_long
];
12753 The value of sizeof() applied to an enumeration type, an object
12754 of an enumeration type, or an enumerator, is the value of sizeof()
12755 applied to the underlying type. */
12756 copy_type_enum (enumtype
, underlying_type
);
12758 /* Compute the minimum and maximum values for the type.
12762 For an enumeration where emin is the smallest enumerator and emax
12763 is the largest, the values of the enumeration are the values of the
12764 underlying type in the range bmin to bmax, where bmin and bmax are,
12765 respectively, the smallest and largest values of the smallest bit-
12766 field that can store emin and emax. */
12768 /* The middle-end currently assumes that types with TYPE_PRECISION
12769 narrower than their underlying type are suitably zero or sign
12770 extended to fill their mode. Similarly, it assumes that the front
12771 end assures that a value of a particular type must be within
12772 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12774 We used to set these fields based on bmin and bmax, but that led
12775 to invalid assumptions like optimizing away bounds checking. So
12776 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12777 TYPE_MAX_VALUE to the values for the mode above and only restrict
12778 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12779 ENUM_UNDERLYING_TYPE (enumtype
)
12780 = build_distinct_type_copy (underlying_type
);
12781 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12782 set_min_and_max_values_for_integral_type
12783 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12785 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12786 if (flag_strict_enums
)
12787 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12791 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12793 /* Convert each of the enumerators to the type of the underlying
12794 type of the enumeration. */
12795 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12797 location_t saved_location
;
12799 decl
= TREE_VALUE (values
);
12800 saved_location
= input_location
;
12801 input_location
= DECL_SOURCE_LOCATION (decl
);
12802 if (fixed_underlying_type_p
)
12803 /* If the enumeration type has a fixed underlying type, we
12804 already checked all of the enumerator values. */
12805 value
= DECL_INITIAL (decl
);
12807 value
= perform_implicit_conversion (underlying_type
,
12808 DECL_INITIAL (decl
),
12809 tf_warning_or_error
);
12810 input_location
= saved_location
;
12812 /* Do not clobber shared ints. */
12813 value
= copy_node (value
);
12815 TREE_TYPE (value
) = enumtype
;
12816 DECL_INITIAL (decl
) = value
;
12819 /* Fix up all variant types of this enum type. */
12820 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12821 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12823 if (at_class_scope_p ()
12824 && COMPLETE_TYPE_P (current_class_type
)
12825 && UNSCOPED_ENUM_P (enumtype
))
12826 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12827 current_class_type
);
12829 /* Finish debugging output for this type. */
12830 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12833 /* Finishes the enum type. This is called only the first time an
12834 enumeration is seen, be it opaque or odinary.
12835 ENUMTYPE is the type object. */
12838 finish_enum (tree enumtype
)
12840 if (processing_template_decl
)
12842 if (at_function_scope_p ())
12843 add_stmt (build_min (TAG_DEFN
, enumtype
));
12847 /* If this is a forward declaration, there should not be any variants,
12848 though we can get a variant in the middle of an enum-specifier with
12849 wacky code like 'enum E { e = sizeof(const E*) };' */
12850 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12851 && (TYPE_VALUES (enumtype
)
12852 || !TYPE_NEXT_VARIANT (enumtype
)));
12855 /* Build and install a CONST_DECL for an enumeration constant of the
12856 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12857 LOC is the location of NAME.
12858 Assignment of sequential values by default is handled here. */
12861 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12867 /* If the VALUE was erroneous, pretend it wasn't there; that will
12868 result in the enum being assigned the next value in sequence. */
12869 if (value
== error_mark_node
)
12872 /* Remove no-op casts from the value. */
12874 STRIP_TYPE_NOPS (value
);
12876 if (! processing_template_decl
)
12878 /* Validate and default VALUE. */
12879 if (value
!= NULL_TREE
)
12881 value
= cxx_constant_value (value
);
12883 if (TREE_CODE (value
) != INTEGER_CST
12884 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12886 error ("enumerator value for %qD is not an integer constant",
12892 /* Default based on previous value. */
12893 if (value
== NULL_TREE
)
12895 if (TYPE_VALUES (enumtype
))
12900 /* C++03 7.2/4: If no initializer is specified for the first
12901 enumerator, the type is an unspecified integral
12902 type. Otherwise the type is the same as the type of the
12903 initializing value of the preceding enumerator unless the
12904 incremented value is not representable in that type, in
12905 which case the type is an unspecified integral type
12906 sufficient to contain the incremented value. */
12907 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12908 if (error_operand_p (prev_value
))
12909 value
= error_mark_node
;
12912 double_int di
= TREE_INT_CST (prev_value
)
12913 .add_with_sign (double_int_one
,
12914 false, &overflowed
);
12917 tree type
= TREE_TYPE (prev_value
);
12918 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12919 if (!double_int_fits_to_tree_p (type
, di
))
12922 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12924 type
= integer_types
[itk
];
12925 if (type
!= NULL_TREE
12926 && (pos
|| !TYPE_UNSIGNED (type
))
12927 && double_int_fits_to_tree_p (type
, di
))
12930 if (type
&& cxx_dialect
< cxx0x
12931 && itk
> itk_unsigned_long
)
12932 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12933 incremented enumerator value is too large for %<unsigned long%>" : "\
12934 incremented enumerator value is too large for %<long%>");
12936 if (type
== NULL_TREE
)
12939 value
= double_int_to_tree (type
, di
);
12944 error ("overflow in enumeration values at %qD", name
);
12945 value
= error_mark_node
;
12950 value
= integer_zero_node
;
12953 /* Remove no-op casts from the value. */
12954 STRIP_TYPE_NOPS (value
);
12956 /* If the underlying type of the enum is fixed, check whether
12957 the enumerator values fits in the underlying type. If it
12958 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12959 if (ENUM_UNDERLYING_TYPE (enumtype
)
12961 && TREE_CODE (value
) == INTEGER_CST
)
12963 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12964 error ("enumerator value %E is outside the range of underlying "
12965 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12967 /* Convert the value to the appropriate type. */
12968 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12972 /* C++ associates enums with global, function, or class declarations. */
12973 context
= current_scope ();
12975 /* Build the actual enumeration constant. Note that the enumeration
12976 constants have the underlying type of the enum (if it is fixed)
12977 or the type of their initializer (if the underlying type of the
12978 enum is not fixed):
12982 If the underlying type is fixed, the type of each enumerator
12983 prior to the closing brace is the underlying type; if the
12984 initializing value of an enumerator cannot be represented by
12985 the underlying type, the program is ill-formed. If the
12986 underlying type is not fixed, the type of each enumerator is
12987 the type of its initializing value.
12989 If the underlying type is not fixed, it will be computed by
12990 finish_enum and we will reset the type of this enumerator. Of
12991 course, if we're processing a template, there may be no value. */
12992 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12994 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12996 DECL_CONTEXT (decl
) = enumtype
;
12997 TREE_CONSTANT (decl
) = 1;
12998 TREE_READONLY (decl
) = 1;
12999 DECL_INITIAL (decl
) = value
;
13001 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13002 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13003 on the TYPE_FIELDS list for `S'. (That's so that you can say
13004 things like `S::i' later.) */
13005 finish_member_declaration (decl
);
13009 /* Add this enumeration constant to the list for this type. */
13010 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13013 /* Look for an enumerator with the given NAME within the enumeration
13014 type ENUMTYPE. This routine is used primarily for qualified name
13015 lookup into an enumerator in C++0x, e.g.,
13017 enum class Color { Red, Green, Blue };
13019 Color color = Color::Red;
13021 Returns the value corresponding to the enumerator, or
13022 NULL_TREE if no such enumerator was found. */
13024 lookup_enumerator (tree enumtype
, tree name
)
13027 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13029 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13030 return e
? TREE_VALUE (e
) : NULL_TREE
;
13034 /* We're defining DECL. Make sure that its type is OK. */
13037 check_function_type (tree decl
, tree current_function_parms
)
13039 tree fntype
= TREE_TYPE (decl
);
13040 tree return_type
= complete_type (TREE_TYPE (fntype
));
13042 /* In a function definition, arg types must be complete. */
13043 require_complete_types_for_parms (current_function_parms
);
13045 if (dependent_type_p (return_type
)
13046 || type_uses_auto (return_type
))
13048 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13049 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13051 tree args
= TYPE_ARG_TYPES (fntype
);
13053 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13054 error ("return type %q#T is incomplete", return_type
);
13056 error ("return type has Java class type %q#T", return_type
);
13058 /* Make it return void instead. */
13059 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13060 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13062 TREE_CHAIN (args
));
13064 fntype
= build_function_type (void_type_node
, args
);
13066 = build_exception_variant (fntype
,
13067 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13068 fntype
= (cp_build_type_attribute_variant
13069 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13070 TREE_TYPE (decl
) = fntype
;
13073 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13076 /* Create the FUNCTION_DECL for a function definition.
13077 DECLSPECS and DECLARATOR are the parts of the declaration;
13078 they describe the function's name and the type it returns,
13079 but twisted together in a fashion that parallels the syntax of C.
13081 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13082 DECLARATOR is really the DECL for the function we are about to
13083 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13084 indicating that the function is an inline defined in-class.
13086 This function creates a binding context for the function body
13087 as well as setting up the FUNCTION_DECL in current_function_decl.
13089 For C++, we must first check whether that datum makes any sense.
13090 For example, "class A local_a(1,2);" means that variable local_a
13091 is an aggregate of type A, which should have a constructor
13092 applied to it with the argument list [1, 2].
13094 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13095 or may be a BLOCK if the function has been defined previously
13096 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13097 error_mark_node if the function has never been defined, or
13098 a BLOCK if the function has been defined somewhere. */
13101 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13103 tree ctype
= NULL_TREE
;
13106 int doing_friend
= 0;
13107 cp_binding_level
*bl
;
13108 tree current_function_parms
;
13109 struct c_fileinfo
*finfo
13110 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13111 bool honor_interface
;
13113 /* Sanity check. */
13114 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13115 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13117 fntype
= TREE_TYPE (decl1
);
13118 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13119 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13121 /* ISO C++ 11.4/5. A friend function defined in a class is in
13122 the (lexical) scope of the class in which it is defined. */
13123 if (!ctype
&& DECL_FRIEND_P (decl1
))
13125 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13127 /* CTYPE could be null here if we're dealing with a template;
13128 for example, `inline friend float foo()' inside a template
13129 will have no CTYPE set. */
13130 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13136 if (DECL_DECLARED_INLINE_P (decl1
)
13137 && lookup_attribute ("noinline", attrs
))
13138 warning (0, "inline function %q+D given attribute noinline", decl1
);
13140 /* Handle gnu_inline attribute. */
13141 if (GNU_INLINE_P (decl1
))
13143 DECL_EXTERNAL (decl1
) = 1;
13144 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13145 DECL_INTERFACE_KNOWN (decl1
) = 1;
13146 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13149 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13150 /* This is a constructor, we must ensure that any default args
13151 introduced by this definition are propagated to the clones
13152 now. The clones are used directly in overload resolution. */
13153 adjust_clone_args (decl1
);
13155 /* Sometimes we don't notice that a function is a static member, and
13156 build a METHOD_TYPE for it. Fix that up now. */
13157 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13158 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13160 /* Set up current_class_type, and enter the scope of the class, if
13163 push_nested_class (ctype
);
13164 else if (DECL_STATIC_FUNCTION_P (decl1
))
13165 push_nested_class (DECL_CONTEXT (decl1
));
13167 /* Now that we have entered the scope of the class, we must restore
13168 the bindings for any template parameters surrounding DECL1, if it
13169 is an inline member template. (Order is important; consider the
13170 case where a template parameter has the same name as a field of
13171 the class.) It is not until after this point that
13172 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13173 if (flags
& SF_INCLASS_INLINE
)
13174 maybe_begin_member_template_processing (decl1
);
13176 /* Effective C++ rule 15. */
13178 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13179 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13180 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13182 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13183 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13184 if (!DECL_INITIAL (decl1
))
13185 DECL_INITIAL (decl1
) = error_mark_node
;
13187 /* This function exists in static storage.
13188 (This does not mean `static' in the C sense!) */
13189 TREE_STATIC (decl1
) = 1;
13191 /* We must call push_template_decl after current_class_type is set
13192 up. (If we are processing inline definitions after exiting a
13193 class scope, current_class_type will be NULL_TREE until set above
13194 by push_nested_class.) */
13195 if (processing_template_decl
)
13197 /* FIXME: Handle error_mark_node more gracefully. */
13198 tree newdecl1
= push_template_decl (decl1
);
13199 if (newdecl1
!= error_mark_node
)
13203 /* We are now in the scope of the function being defined. */
13204 current_function_decl
= decl1
;
13206 /* Save the parm names or decls from this function's declarator
13207 where store_parm_decls will find them. */
13208 current_function_parms
= DECL_ARGUMENTS (decl1
);
13210 /* Make sure the parameter and return types are reasonable. When
13211 you declare a function, these types can be incomplete, but they
13212 must be complete when you define the function. */
13213 check_function_type (decl1
, current_function_parms
);
13215 /* Build the return declaration for the function. */
13216 restype
= TREE_TYPE (fntype
);
13218 if (DECL_RESULT (decl1
) == NULL_TREE
)
13222 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13223 DECL_ARTIFICIAL (resdecl
) = 1;
13224 DECL_IGNORED_P (resdecl
) = 1;
13225 DECL_RESULT (decl1
) = resdecl
;
13227 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13230 /* Let the user know we're compiling this function. */
13231 announce_function (decl1
);
13233 /* Record the decl so that the function name is defined.
13234 If we already have a decl for this name, and it is a FUNCTION_DECL,
13235 use the old decl. */
13236 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13238 /* A specialization is not used to guide overload resolution. */
13239 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13240 && !(DECL_USE_TEMPLATE (decl1
) &&
13241 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13243 tree olddecl
= pushdecl (decl1
);
13245 if (olddecl
== error_mark_node
)
13246 /* If something went wrong when registering the declaration,
13247 use DECL1; we have to have a FUNCTION_DECL to use when
13248 parsing the body of the function. */
13252 /* Otherwise, OLDDECL is either a previous declaration
13253 of the same function or DECL1 itself. */
13255 if (warn_missing_declarations
13256 && olddecl
== decl1
13257 && !DECL_MAIN_P (decl1
)
13258 && TREE_PUBLIC (decl1
)
13259 && !DECL_DECLARED_INLINE_P (decl1
))
13263 /* Check whether DECL1 is in an anonymous
13265 for (context
= DECL_CONTEXT (decl1
);
13267 context
= DECL_CONTEXT (context
))
13269 if (TREE_CODE (context
) == NAMESPACE_DECL
13270 && DECL_NAME (context
) == NULL_TREE
)
13274 if (context
== NULL
)
13275 warning (OPT_Wmissing_declarations
,
13276 "no previous declaration for %q+D", decl1
);
13284 /* We need to set the DECL_CONTEXT. */
13285 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13286 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13288 fntype
= TREE_TYPE (decl1
);
13289 restype
= TREE_TYPE (fntype
);
13291 /* If #pragma weak applies, mark the decl appropriately now.
13292 The pragma only applies to global functions. Because
13293 determining whether or not the #pragma applies involves
13294 computing the mangled name for the declaration, we cannot
13295 apply the pragma until after we have merged this declaration
13296 with any previous declarations; if the original declaration
13297 has a linkage specification, that specification applies to
13298 the definition as well, and may affect the mangled name. */
13299 if (DECL_FILE_SCOPE_P (decl1
))
13300 maybe_apply_pragma_weak (decl1
);
13303 /* Reset this in case the call to pushdecl changed it. */
13304 current_function_decl
= decl1
;
13306 gcc_assert (DECL_INITIAL (decl1
));
13308 /* This function may already have been parsed, in which case just
13309 return; our caller will skip over the body without parsing. */
13310 if (DECL_INITIAL (decl1
) != error_mark_node
)
13313 /* Initialize RTL machinery. We cannot do this until
13314 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13315 even when processing a template; this is how we get
13316 CFUN set up, and our per-function variables initialized.
13317 FIXME factor out the non-RTL stuff. */
13318 bl
= current_binding_level
;
13319 allocate_struct_function (decl1
, processing_template_decl
);
13321 /* Initialize the language data structures. Whenever we start
13322 a new function, we destroy temporaries in the usual way. */
13323 cfun
->language
= ggc_alloc_cleared_language_function ();
13324 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13325 current_binding_level
= bl
;
13327 if (!processing_template_decl
&& type_uses_auto (restype
))
13329 FNDECL_USED_AUTO (decl1
) = true;
13330 current_function_auto_return_pattern
= restype
;
13333 /* Start the statement-tree, start the tree now. */
13334 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13336 /* If we are (erroneously) defining a function that we have already
13337 defined before, wipe out what we knew before. */
13338 if (!DECL_PENDING_INLINE_P (decl1
))
13339 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13341 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13343 /* We know that this was set up by `grokclassfn'. We do not
13344 wait until `store_parm_decls', since evil parse errors may
13345 never get us to that point. Here we keep the consistency
13346 between `current_class_type' and `current_class_ptr'. */
13347 tree t
= DECL_ARGUMENTS (decl1
);
13349 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13350 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13352 cp_function_chain
->x_current_class_ref
13353 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13354 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13355 cp_function_chain
->x_current_class_ptr
= t
;
13357 /* Constructors and destructors need to know whether they're "in
13358 charge" of initializing virtual base classes. */
13359 t
= DECL_CHAIN (t
);
13360 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13362 current_in_charge_parm
= t
;
13363 t
= DECL_CHAIN (t
);
13365 if (DECL_HAS_VTT_PARM_P (decl1
))
13367 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13368 current_vtt_parm
= t
;
13372 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13373 /* Implicitly-defined methods (like the
13374 destructor for a class in which no destructor
13375 is explicitly declared) must not be defined
13376 until their definition is needed. So, we
13377 ignore interface specifications for
13378 compiler-generated functions. */
13379 && !DECL_ARTIFICIAL (decl1
));
13381 if (processing_template_decl
)
13382 /* Don't mess with interface flags. */;
13383 else if (DECL_INTERFACE_KNOWN (decl1
))
13385 tree ctx
= decl_function_context (decl1
);
13387 if (DECL_NOT_REALLY_EXTERN (decl1
))
13388 DECL_EXTERNAL (decl1
) = 0;
13390 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13391 /* This is a function in a local class in an extern inline
13392 or template function. */
13393 comdat_linkage (decl1
);
13395 /* If this function belongs to an interface, it is public.
13396 If it belongs to someone else's interface, it is also external.
13397 This only affects inlines and template instantiations. */
13398 else if (!finfo
->interface_unknown
&& honor_interface
)
13400 if (DECL_DECLARED_INLINE_P (decl1
)
13401 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13403 DECL_EXTERNAL (decl1
)
13404 = (finfo
->interface_only
13405 || (DECL_DECLARED_INLINE_P (decl1
)
13406 && ! flag_implement_inlines
13407 && !DECL_VINDEX (decl1
)));
13409 /* For WIN32 we also want to put these in linkonce sections. */
13410 maybe_make_one_only (decl1
);
13413 DECL_EXTERNAL (decl1
) = 0;
13414 DECL_INTERFACE_KNOWN (decl1
) = 1;
13415 /* If this function is in an interface implemented in this file,
13416 make sure that the back end knows to emit this function
13418 if (!DECL_EXTERNAL (decl1
))
13419 mark_needed (decl1
);
13421 else if (finfo
->interface_unknown
&& finfo
->interface_only
13422 && honor_interface
)
13424 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13425 interface, we will have both finfo->interface_unknown and
13426 finfo->interface_only set. In that case, we don't want to
13427 use the normal heuristics because someone will supply a
13428 #pragma implementation elsewhere, and deducing it here would
13429 produce a conflict. */
13430 comdat_linkage (decl1
);
13431 DECL_EXTERNAL (decl1
) = 0;
13432 DECL_INTERFACE_KNOWN (decl1
) = 1;
13433 DECL_DEFER_OUTPUT (decl1
) = 1;
13437 /* This is a definition, not a reference.
13438 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13439 if (!GNU_INLINE_P (decl1
))
13440 DECL_EXTERNAL (decl1
) = 0;
13442 if ((DECL_DECLARED_INLINE_P (decl1
)
13443 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13444 && ! DECL_INTERFACE_KNOWN (decl1
))
13445 DECL_DEFER_OUTPUT (decl1
) = 1;
13447 DECL_INTERFACE_KNOWN (decl1
) = 1;
13450 /* Determine the ELF visibility attribute for the function. We must not
13451 do this before calling "pushdecl", as we must allow "duplicate_decls"
13452 to merge any attributes appropriately. We also need to wait until
13454 if (!DECL_CLONED_FUNCTION_P (decl1
))
13455 determine_visibility (decl1
);
13457 begin_scope (sk_function_parms
, decl1
);
13461 if (DECL_DESTRUCTOR_P (decl1
)
13462 || (DECL_CONSTRUCTOR_P (decl1
)
13463 && targetm
.cxx
.cdtor_returns_this ()))
13465 cdtor_label
= build_decl (input_location
,
13466 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13467 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13470 start_fname_decls ();
13472 store_parm_decls (current_function_parms
);
13476 /* Like start_preparsed_function, except that instead of a
13477 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13479 Returns 1 on success. If the DECLARATOR is not suitable for a function
13480 (it defines a datum instead), we return 0, which tells
13481 yyparse to report a parse error. */
13484 start_function (cp_decl_specifier_seq
*declspecs
,
13485 const cp_declarator
*declarator
,
13490 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13491 if (decl1
== error_mark_node
)
13493 /* If the declarator is not suitable for a function definition,
13494 cause a syntax error. */
13495 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13497 error ("invalid function declaration");
13501 if (DECL_MAIN_P (decl1
))
13502 /* main must return int. grokfndecl should have corrected it
13503 (and issued a diagnostic) if the user got it wrong. */
13504 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13505 integer_type_node
));
13507 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13512 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13516 use_eh_spec_block (tree fn
)
13518 return (flag_exceptions
&& flag_enforce_eh_specs
13519 && !processing_template_decl
13520 && !type_throw_all_p (TREE_TYPE (fn
))
13521 /* We insert the EH_SPEC_BLOCK only in the original
13522 function; then, it is copied automatically to the
13524 && !DECL_CLONED_FUNCTION_P (fn
)
13525 /* Implicitly-generated constructors and destructors have
13526 exception specifications. However, those specifications
13527 are the union of the possible exceptions specified by the
13528 constructors/destructors for bases and members, so no
13529 unallowed exception will ever reach this function. By
13530 not creating the EH_SPEC_BLOCK we save a little memory,
13531 and we avoid spurious warnings about unreachable
13533 && !DECL_DEFAULTED_FN (fn
));
13536 /* Store the parameter declarations into the current function declaration.
13537 This is called after parsing the parameter declarations, before
13538 digesting the body of the function.
13540 Also install to binding contour return value identifier, if any. */
13543 store_parm_decls (tree current_function_parms
)
13545 tree fndecl
= current_function_decl
;
13548 /* This is a chain of any other decls that came in among the parm
13549 declarations. If a parm is declared with enum {foo, bar} x;
13550 then CONST_DECLs for foo and bar are put here. */
13551 tree nonparms
= NULL_TREE
;
13553 if (current_function_parms
)
13555 /* This case is when the function was defined with an ANSI prototype.
13556 The parms already have decls, so we need not do anything here
13557 except record them as in effect
13558 and complain if any redundant old-style parm decls were written. */
13560 tree specparms
= current_function_parms
;
13563 /* Must clear this because it might contain TYPE_DECLs declared
13565 current_binding_level
->names
= NULL
;
13567 /* If we're doing semantic analysis, then we'll call pushdecl
13568 for each of these. We must do them in reverse order so that
13569 they end in the correct forward order. */
13570 specparms
= nreverse (specparms
);
13572 for (parm
= specparms
; parm
; parm
= next
)
13574 next
= DECL_CHAIN (parm
);
13575 if (TREE_CODE (parm
) == PARM_DECL
)
13577 if (DECL_NAME (parm
) == NULL_TREE
13578 || !VOID_TYPE_P (parm
))
13581 error ("parameter %qD declared void", parm
);
13585 /* If we find an enum constant or a type tag,
13586 put it aside for the moment. */
13587 TREE_CHAIN (parm
) = NULL_TREE
;
13588 nonparms
= chainon (nonparms
, parm
);
13592 /* Get the decls in their original chain order and record in the
13593 function. This is all and only the PARM_DECLs that were
13594 pushed into scope by the loop above. */
13595 DECL_ARGUMENTS (fndecl
) = getdecls ();
13598 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13600 /* Now store the final chain of decls for the arguments
13601 as the decl-chain of the current lexical scope.
13602 Put the enumerators in as well, at the front so that
13603 DECL_ARGUMENTS is not modified. */
13604 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13606 if (use_eh_spec_block (current_function_decl
))
13607 current_eh_spec_block
= begin_eh_spec_block ();
13611 /* We have finished doing semantic analysis on DECL, but have not yet
13612 generated RTL for its body. Save away our current state, so that
13613 when we want to generate RTL later we know what to do. */
13616 save_function_data (tree decl
)
13618 struct language_function
*f
;
13620 /* Save the language-specific per-function data so that we can
13621 get it back when we really expand this function. */
13622 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13625 f
= ggc_alloc_language_function ();
13626 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13627 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13629 /* Clear out the bits we don't need. */
13630 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13631 f
->bindings
= NULL
;
13632 f
->x_local_names
= NULL
;
13633 f
->base
.local_typedefs
= NULL
;
13637 /* Set the return value of the constructor (if present). */
13640 finish_constructor_body (void)
13645 if (targetm
.cxx
.cdtor_returns_this ()
13646 && (! TYPE_FOR_JAVA (current_class_type
)))
13648 /* Any return from a constructor will end up here. */
13649 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13651 val
= DECL_ARGUMENTS (current_function_decl
);
13652 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13653 DECL_RESULT (current_function_decl
), val
);
13654 /* Return the address of the object. */
13655 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13656 add_stmt (exprstmt
);
13660 /* Do all the processing for the beginning of a destructor; set up the
13661 vtable pointers and cleanups for bases and members. */
13664 begin_destructor_body (void)
13666 tree compound_stmt
;
13668 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13669 issued an error message. We still want to try to process the
13670 body of the function, but initialize_vtbl_ptrs will crash if
13671 TYPE_BINFO is NULL. */
13672 if (COMPLETE_TYPE_P (current_class_type
))
13674 compound_stmt
= begin_compound_stmt (0);
13675 /* Make all virtual function table pointers in non-virtual base
13676 classes point to CURRENT_CLASS_TYPE's virtual function
13678 initialize_vtbl_ptrs (current_class_ptr
);
13679 finish_compound_stmt (compound_stmt
);
13681 /* Insert a cleanup to let the back end know that the object is dead
13682 when we exit the destructor, either normally or via exception. */
13683 tree clobber
= build_constructor (current_class_type
, NULL
);
13684 TREE_THIS_VOLATILE (clobber
) = true;
13685 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13686 current_class_ref
, clobber
);
13687 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13689 /* And insert cleanups for our bases and members so that they
13690 will be properly destroyed if we throw. */
13691 push_base_cleanups ();
13695 /* At the end of every destructor we generate code to delete the object if
13696 necessary. Do that now. */
13699 finish_destructor_body (void)
13703 /* Any return from a destructor will end up here; that way all base
13704 and member cleanups will be run when the function returns. */
13705 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13707 /* In a virtual destructor, we must call delete. */
13708 if (DECL_VIRTUAL_P (current_function_decl
))
13711 tree virtual_size
= cxx_sizeof (current_class_type
);
13715 At the point of definition of a virtual destructor (including
13716 an implicit definition), non-placement operator delete shall
13717 be looked up in the scope of the destructor's class and if
13718 found shall be accessible and unambiguous. */
13719 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13721 /*global_p=*/false,
13722 /*placement=*/NULL_TREE
,
13723 /*alloc_fn=*/NULL_TREE
,
13724 tf_warning_or_error
);
13726 if_stmt
= begin_if_stmt ();
13727 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13728 current_in_charge_parm
,
13731 finish_expr_stmt (exprstmt
);
13732 finish_then_clause (if_stmt
);
13733 finish_if_stmt (if_stmt
);
13736 if (targetm
.cxx
.cdtor_returns_this ())
13740 val
= DECL_ARGUMENTS (current_function_decl
);
13741 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13742 DECL_RESULT (current_function_decl
), val
);
13743 /* Return the address of the object. */
13744 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13745 add_stmt (exprstmt
);
13749 /* Do the necessary processing for the beginning of a function body, which
13750 in this case includes member-initializers, but not the catch clauses of
13751 a function-try-block. Currently, this means opening a binding level
13752 for the member-initializers (in a ctor), member cleanups (in a dtor),
13753 and capture proxies (in a lambda operator()). */
13756 begin_function_body (void)
13760 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13763 if (processing_template_decl
)
13764 /* Do nothing now. */;
13766 /* Always keep the BLOCK node associated with the outermost pair of
13767 curly braces of a function. These are needed for correct
13768 operation of dwarfout.c. */
13769 keep_next_level (true);
13771 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13773 if (processing_template_decl
)
13774 /* Do nothing now. */;
13775 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13776 begin_destructor_body ();
13781 /* Do the processing for the end of a function body. Currently, this means
13782 closing out the cleanups for fully-constructed bases and members, and in
13783 the case of the destructor, deleting the object if desired. Again, this
13784 is only meaningful for [cd]tors, since they are the only functions where
13785 there is a significant distinction between the main body and any
13786 function catch clauses. Handling, say, main() return semantics here
13787 would be wrong, as flowing off the end of a function catch clause for
13788 main() would also need to return 0. */
13791 finish_function_body (tree compstmt
)
13793 if (compstmt
== NULL_TREE
)
13796 /* Close the block. */
13797 finish_compound_stmt (compstmt
);
13799 if (processing_template_decl
)
13800 /* Do nothing now. */;
13801 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13802 finish_constructor_body ();
13803 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13804 finish_destructor_body ();
13807 /* Given a function, returns the BLOCK corresponding to the outermost level
13808 of curly braces, skipping the artificial block created for constructor
13812 outer_curly_brace_block (tree fndecl
)
13814 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13815 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13816 /* Skip the artificial function body block. */
13817 block
= BLOCK_SUBBLOCKS (block
);
13821 /* If FNDECL is a class's key method, add the class to the list of
13822 keyed classes that should be emitted. */
13825 record_key_method_defined (tree fndecl
)
13827 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13828 && DECL_VIRTUAL_P (fndecl
)
13829 && !processing_template_decl
)
13831 tree fnclass
= DECL_CONTEXT (fndecl
);
13832 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13833 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13837 /* Subroutine of finish_function.
13838 Save the body of constexpr functions for possible
13839 future compile time evaluation. */
13842 maybe_save_function_definition (tree fun
)
13844 if (!processing_template_decl
13845 && DECL_DECLARED_CONSTEXPR_P (fun
)
13846 && !DECL_CLONED_FUNCTION_P (fun
))
13847 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13850 /* Finish up a function declaration and compile that function
13851 all the way to assembler language output. The free the storage
13852 for the function definition.
13854 FLAGS is a bitwise or of the following values:
13856 We just finished processing the body of an in-class inline
13857 function definition. (This processing will have taken place
13858 after the class definition is complete.) */
13861 finish_function (int flags
)
13863 tree fndecl
= current_function_decl
;
13864 tree fntype
, ctype
= NULL_TREE
;
13865 int inclass_inline
= (flags
& 2) != 0;
13867 /* When we get some parse errors, we can end up without a
13868 current_function_decl, so cope. */
13869 if (fndecl
== NULL_TREE
)
13870 return error_mark_node
;
13872 if (c_dialect_objc ())
13873 objc_finish_function ();
13875 gcc_assert (!defer_mark_used_calls
);
13876 defer_mark_used_calls
= true;
13878 record_key_method_defined (fndecl
);
13880 fntype
= TREE_TYPE (fndecl
);
13882 /* TREE_READONLY (fndecl) = 1;
13883 This caused &foo to be of type ptr-to-const-function
13884 which then got a warning when stored in a ptr-to-function variable. */
13886 gcc_assert (building_stmt_list_p ());
13887 /* The current function is being defined, so its DECL_INITIAL should
13888 be set, and unless there's a multiple definition, it should be
13889 error_mark_node. */
13890 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13892 /* For a cloned function, we've already got all the code we need;
13893 there's no need to add any extra bits. */
13894 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13896 /* Make it so that `main' always returns 0 by default. */
13897 if (DECL_MAIN_P (current_function_decl
))
13898 finish_return_stmt (integer_zero_node
);
13900 if (use_eh_spec_block (current_function_decl
))
13901 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13902 (TREE_TYPE (current_function_decl
)),
13903 current_eh_spec_block
);
13906 /* If we're saving up tree structure, tie off the function now. */
13907 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13909 finish_fname_decls ();
13911 /* If this function can't throw any exceptions, remember that. */
13912 if (!processing_template_decl
13913 && !cp_function_chain
->can_throw
13914 && !flag_non_call_exceptions
13915 && !decl_replaceable_p (fndecl
))
13916 TREE_NOTHROW (fndecl
) = 1;
13918 /* This must come after expand_function_end because cleanups might
13919 have declarations (from inline functions) that need to go into
13920 this function's blocks. */
13922 /* If the current binding level isn't the outermost binding level
13923 for this function, either there is a bug, or we have experienced
13924 syntax errors and the statement tree is malformed. */
13925 if (current_binding_level
->kind
!= sk_function_parms
)
13927 /* Make sure we have already experienced errors. */
13928 gcc_assert (errorcount
);
13930 /* Throw away the broken statement tree and extra binding
13932 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13934 while (current_binding_level
->kind
!= sk_function_parms
)
13936 if (current_binding_level
->kind
== sk_class
)
13937 pop_nested_class ();
13939 poplevel (0, 0, 0);
13942 poplevel (1, 0, 1);
13944 /* Statements should always be full-expressions at the outermost set
13945 of curly braces for a function. */
13946 gcc_assert (stmts_are_full_exprs_p ());
13948 /* If there are no return statements in a function with auto return type,
13949 the return type is void. But if the declared type is something like
13950 auto*, this is an error. */
13951 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13952 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13954 if (!is_auto (current_function_auto_return_pattern
)
13955 && !current_function_returns_value
&& !current_function_returns_null
)
13957 error ("no return statements in function returning %qT",
13958 current_function_auto_return_pattern
);
13959 inform (input_location
, "only plain %<auto%> return type can be "
13960 "deduced to %<void%>");
13962 apply_deduced_return_type (fndecl
, void_type_node
);
13963 fntype
= TREE_TYPE (fndecl
);
13966 /* Save constexpr function body before it gets munged by
13967 the NRV transformation. */
13968 maybe_save_function_definition (fndecl
);
13970 /* Set up the named return value optimization, if we can. Candidate
13971 variables are selected in check_return_expr. */
13972 if (current_function_return_value
)
13974 tree r
= current_function_return_value
;
13977 if (r
!= error_mark_node
13978 /* This is only worth doing for fns that return in memory--and
13979 simpler, since we don't have to worry about promoted modes. */
13980 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13981 /* Only allow this for variables declared in the outer scope of
13982 the function so we know that their lifetime always ends with a
13983 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13984 we were to do this optimization in tree-ssa. */
13985 && (outer
= outer_curly_brace_block (fndecl
))
13986 && chain_member (r
, BLOCK_VARS (outer
)))
13987 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13989 current_function_return_value
= NULL_TREE
;
13992 /* Remember that we were in class scope. */
13993 if (current_class_name
)
13994 ctype
= current_class_type
;
13996 /* Must mark the RESULT_DECL as being in this function. */
13997 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13999 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14000 to the FUNCTION_DECL node itself. */
14001 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14003 /* Save away current state, if appropriate. */
14004 if (!processing_template_decl
)
14005 save_function_data (fndecl
);
14007 /* Complain if there's just no return statement. */
14008 if (warn_return_type
14009 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14010 && !dependent_type_p (TREE_TYPE (fntype
))
14011 && !current_function_returns_value
&& !current_function_returns_null
14012 /* Don't complain if we abort or throw. */
14013 && !current_function_returns_abnormally
14014 /* Don't complain if we are declared noreturn. */
14015 && !TREE_THIS_VOLATILE (fndecl
)
14016 && !DECL_NAME (DECL_RESULT (fndecl
))
14017 && !TREE_NO_WARNING (fndecl
)
14018 /* Structor return values (if any) are set by the compiler. */
14019 && !DECL_CONSTRUCTOR_P (fndecl
)
14020 && !DECL_DESTRUCTOR_P (fndecl
)
14021 && targetm
.warn_func_return (fndecl
))
14023 warning (OPT_Wreturn_type
,
14024 "no return statement in function returning non-void");
14025 TREE_NO_WARNING (fndecl
) = 1;
14028 /* Store the end of the function, so that we get good line number
14029 info for the epilogue. */
14030 cfun
->function_end_locus
= input_location
;
14032 /* Complain about parameters that are only set, but never otherwise used. */
14033 if (warn_unused_but_set_parameter
14034 && !processing_template_decl
14035 && errorcount
== unused_but_set_errorcount
14036 && !DECL_CLONED_FUNCTION_P (fndecl
))
14040 for (decl
= DECL_ARGUMENTS (fndecl
);
14042 decl
= DECL_CHAIN (decl
))
14043 if (TREE_USED (decl
)
14044 && TREE_CODE (decl
) == PARM_DECL
14045 && !DECL_READ_P (decl
)
14046 && DECL_NAME (decl
)
14047 && !DECL_ARTIFICIAL (decl
)
14048 && !TREE_NO_WARNING (decl
)
14049 && !DECL_IN_SYSTEM_HEADER (decl
)
14050 && TREE_TYPE (decl
) != error_mark_node
14051 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14052 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14053 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14054 warning (OPT_Wunused_but_set_parameter
,
14055 "parameter %q+D set but not used", decl
);
14056 unused_but_set_errorcount
= errorcount
;
14059 /* Complain about locally defined typedefs that are not used in this
14061 maybe_warn_unused_local_typedefs ();
14063 /* Genericize before inlining. */
14064 if (!processing_template_decl
)
14066 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14067 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14068 cp_genericize (fndecl
);
14069 /* Clear out the bits we don't need. */
14070 f
->x_current_class_ptr
= NULL
;
14071 f
->x_current_class_ref
= NULL
;
14072 f
->x_eh_spec_block
= NULL
;
14073 f
->x_in_charge_parm
= NULL
;
14074 f
->x_vtt_parm
= NULL
;
14075 f
->x_return_value
= NULL
;
14076 f
->bindings
= NULL
;
14077 f
->extern_decl_map
= NULL
;
14079 /* Clear out the bits we don't need. */
14080 local_names
= NULL
;
14082 /* We're leaving the context of this function, so zap cfun. It's still in
14083 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14085 current_function_decl
= NULL
;
14087 /* If this is an in-class inline definition, we may have to pop the
14088 bindings for the template parameters that we added in
14089 maybe_begin_member_template_processing when start_function was
14091 if (inclass_inline
)
14092 maybe_end_member_template_processing ();
14094 /* Leave the scope of the class. */
14096 pop_nested_class ();
14101 current_function_decl
= NULL_TREE
;
14103 defer_mark_used_calls
= false;
14104 if (deferred_mark_used_calls
)
14109 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14111 vec_free (deferred_mark_used_calls
);
14117 /* Create the FUNCTION_DECL for a function definition.
14118 DECLSPECS and DECLARATOR are the parts of the declaration;
14119 they describe the return type and the name of the function,
14120 but twisted together in a fashion that parallels the syntax of C.
14122 This function creates a binding context for the function body
14123 as well as setting up the FUNCTION_DECL in current_function_decl.
14125 Returns a FUNCTION_DECL on success.
14127 If the DECLARATOR is not suitable for a function (it defines a datum
14128 instead), we return 0, which tells yyparse to report a parse error.
14130 May return void_type_node indicating that this method is actually
14131 a friend. See grokfield for more details.
14133 Came here with a `.pushlevel' .
14135 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14136 CHANGES TO CODE IN `grokfield'. */
14139 grokmethod (cp_decl_specifier_seq
*declspecs
,
14140 const cp_declarator
*declarator
, tree attrlist
)
14142 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14145 if (fndecl
== error_mark_node
)
14146 return error_mark_node
;
14148 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14150 error ("invalid member function declaration");
14151 return error_mark_node
;
14155 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14157 /* Pass friends other than inline friend functions back. */
14158 if (fndecl
== void_type_node
)
14161 if (DECL_IN_AGGR_P (fndecl
))
14163 if (DECL_CLASS_SCOPE_P (fndecl
))
14164 error ("%qD is already defined in class %qT", fndecl
,
14165 DECL_CONTEXT (fndecl
));
14166 return error_mark_node
;
14169 check_template_shadow (fndecl
);
14171 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14172 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14174 /* We process method specializations in finish_struct_1. */
14175 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14177 fndecl
= push_template_decl (fndecl
);
14178 if (fndecl
== error_mark_node
)
14182 if (! DECL_FRIEND_P (fndecl
))
14184 if (DECL_CHAIN (fndecl
))
14186 fndecl
= copy_node (fndecl
);
14187 TREE_CHAIN (fndecl
) = NULL_TREE
;
14191 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14193 DECL_IN_AGGR_P (fndecl
) = 1;
14198 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14199 we can lay it out later, when and if its type becomes complete.
14201 Also handle constexpr pointer to member variables where the initializer
14202 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14205 maybe_register_incomplete_var (tree var
)
14207 gcc_assert (VAR_P (var
));
14209 /* Keep track of variables with incomplete types. */
14210 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14211 && DECL_EXTERNAL (var
))
14213 tree inner_type
= TREE_TYPE (var
);
14215 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14216 inner_type
= TREE_TYPE (inner_type
);
14217 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14219 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14220 /* RTTI TD entries are created while defining the type_info. */
14221 || (TYPE_LANG_SPECIFIC (inner_type
)
14222 && TYPE_BEING_DEFINED (inner_type
)))
14224 incomplete_var iv
= {var
, inner_type
};
14225 vec_safe_push (incomplete_vars
, iv
);
14227 else if (TYPE_PTRMEM_P (inner_type
)
14228 && DECL_INITIAL (var
)
14229 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14231 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14232 gcc_assert (TYPE_BEING_DEFINED (context
));
14233 incomplete_var iv
= {var
, context
};
14234 vec_safe_push (incomplete_vars
, iv
);
14239 /* Called when a class type (given by TYPE) is defined. If there are
14240 any existing VAR_DECLs whose type has been completed by this
14241 declaration, update them now. */
14244 complete_vars (tree type
)
14247 incomplete_var
*iv
;
14249 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14251 if (same_type_p (type
, iv
->incomplete_type
))
14253 tree var
= iv
->decl
;
14254 tree type
= TREE_TYPE (var
);
14256 if (TYPE_PTRMEM_P (type
))
14257 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14260 /* Complete the type of the variable. The VAR_DECL itself
14261 will be laid out in expand_expr. */
14262 complete_type (type
);
14263 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14266 /* Remove this entry from the list. */
14267 incomplete_vars
->unordered_remove (ix
);
14273 /* Check for pending declarations which may have abstract type. */
14274 complete_type_check_abstract (type
);
14277 /* If DECL is of a type which needs a cleanup, build and return an
14278 expression to perform that cleanup here. Return NULL_TREE if no
14279 cleanup need be done. */
14282 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14288 /* Assume no cleanup is required. */
14289 cleanup
= NULL_TREE
;
14291 if (error_operand_p (decl
))
14294 /* Handle "__attribute__((cleanup))". We run the cleanup function
14295 before the destructor since the destructor is what actually
14296 terminates the lifetime of the object. */
14297 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14304 /* Get the name specified by the user for the cleanup function. */
14305 id
= TREE_VALUE (TREE_VALUE (attr
));
14306 /* Look up the name to find the cleanup function to call. It is
14307 important to use lookup_name here because that is what is
14308 used in c-common.c:handle_cleanup_attribute when performing
14309 initial checks on the attribute. Note that those checks
14310 include ensuring that the function found is not an overloaded
14311 function, or an object with an overloaded call operator,
14312 etc.; we can rely on the fact that the function found is an
14313 ordinary FUNCTION_DECL. */
14314 fn
= lookup_name (id
);
14315 arg
= build_address (decl
);
14317 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14318 if (cleanup
== error_mark_node
)
14319 return error_mark_node
;
14321 /* Handle ordinary C++ destructors. */
14322 type
= TREE_TYPE (decl
);
14323 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
14325 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14326 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
14327 && CLASSTYPE_VBASECLASSES (type
));
14331 if (TREE_CODE (type
) == ARRAY_TYPE
)
14334 addr
= build_address (decl
);
14336 /* Optimize for space over speed here. */
14337 if (!has_vbases
|| flag_expensive_optimizations
)
14338 flags
|= LOOKUP_NONVIRTUAL
;
14340 call
= build_delete (TREE_TYPE (addr
), addr
,
14341 sfk_complete_destructor
, flags
, 0, complain
);
14342 if (call
== error_mark_node
)
14343 cleanup
= error_mark_node
;
14345 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14350 /* build_delete sets the location of the destructor call to the
14351 current location, even though the destructor is going to be
14352 called later, at the end of the current scope. This can lead to
14353 a "jumpy" behaviour for users of debuggers when they step around
14354 the end of the block. So let's unset the location of the
14355 destructor call instead. */
14356 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14357 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14362 /* When a stmt has been parsed, this function is called. */
14369 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14370 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14371 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14374 static_fn_type (tree memfntype
)
14379 if (TYPE_PTRMEMFUNC_P (memfntype
))
14380 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14381 if (POINTER_TYPE_P (memfntype
)
14382 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14383 memfntype
= TREE_TYPE (memfntype
);
14384 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14386 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14387 args
= TYPE_ARG_TYPES (memfntype
);
14388 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14389 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14390 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14391 fntype
= (cp_build_type_attribute_variant
14392 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14393 fntype
= (build_exception_variant
14394 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14398 /* DECL was originally constructed as a non-static member function,
14399 but turned out to be static. Update it accordingly. */
14402 revert_static_member_fn (tree decl
)
14404 tree stype
= static_fn_type (decl
);
14405 cp_cv_quals quals
= type_memfn_quals (stype
);
14406 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14408 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14409 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14411 TREE_TYPE (decl
) = stype
;
14413 if (DECL_ARGUMENTS (decl
))
14414 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14415 DECL_STATIC_FUNCTION_P (decl
) = 1;
14418 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14419 one of the language-independent trees. */
14421 enum cp_tree_node_structure_enum
14422 cp_tree_node_structure (union lang_tree_node
* t
)
14424 switch (TREE_CODE (&t
->generic
))
14426 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14427 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14428 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14429 case OVERLOAD
: return TS_CP_OVERLOAD
;
14430 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14431 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14432 case BASELINK
: return TS_CP_BASELINK
;
14433 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14434 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14435 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14436 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14437 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14438 case CONSTRAINT_INFO
: return TS_CP_CONSTRAINT_INFO
;
14439 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14440 default: return TS_CP_GENERIC
;
14444 /* Build the void_list_node (void_type_node having been created). */
14446 build_void_list_node (void)
14448 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14453 cp_missing_noreturn_ok_p (tree decl
)
14455 /* A missing noreturn is ok for the `main' function. */
14456 return DECL_MAIN_P (decl
);
14459 /* Return the COMDAT group into which DECL should be placed. */
14462 cxx_comdat_group (tree decl
)
14466 /* Virtual tables, construction virtual tables, and virtual table
14467 tables all go in a single COMDAT group, named after the primary
14469 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14470 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14471 /* For all other DECLs, the COMDAT group is the mangled name of the
14472 declaration itself. */
14475 while (DECL_THUNK_P (decl
))
14477 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14478 into the same section as the target function. In that case
14479 we must return target's name. */
14480 tree target
= THUNK_TARGET (decl
);
14481 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14482 && DECL_SECTION_NAME (target
) != NULL
14483 && DECL_ONE_ONLY (target
))
14488 name
= DECL_ASSEMBLER_NAME (decl
);
14494 /* Returns the return type for FN as written by the user, which may include
14495 a placeholder for a deduced return type. */
14498 fndecl_declared_return_type (tree fn
)
14500 fn
= STRIP_TEMPLATE (fn
);
14501 if (FNDECL_USED_AUTO (fn
))
14503 struct language_function
*f
= NULL
;
14504 if (DECL_STRUCT_FUNCTION (fn
))
14505 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14507 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14508 return f
->x_auto_return_pattern
;
14510 return TREE_TYPE (TREE_TYPE (fn
));
14513 /* Returns true iff DECL was declared with an auto return type and it has
14514 not yet been deduced to a real type. */
14517 undeduced_auto_decl (tree decl
)
14519 if (cxx_dialect
< cxx1y
)
14521 return type_uses_auto (TREE_TYPE (decl
));
14524 /* Complain if DECL has an undeduced return type. */
14527 require_deduced_type (tree decl
)
14529 if (undeduced_auto_decl (decl
))
14530 error ("use of %qD before deduction of %<auto%>", decl
);
14533 #include "gt-cp-decl.h"