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
)
634 || lookup_attribute ("warn_unused",
635 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
637 if (! TREE_USED (decl
))
638 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
639 else if (DECL_CONTEXT (decl
) == current_function_decl
640 // For -Wunused-but-set-variable leave references alone.
641 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
642 && errorcount
== unused_but_set_errorcount
)
644 warning (OPT_Wunused_but_set_variable
,
645 "variable %q+D set but not used", decl
);
646 unused_but_set_errorcount
= errorcount
;
651 /* Remove declarations for all the DECLs in this level. */
652 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
654 if (leaving_for_scope
&& VAR_P (link
)
655 /* It's hard to make this ARM compatibility hack play nicely with
656 lambdas, and it really isn't necessary in C++11 mode. */
657 && cxx_dialect
< cxx11
660 tree name
= DECL_NAME (link
);
664 ob
= outer_binding (name
,
665 IDENTIFIER_BINDING (name
),
668 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
670 ns_binding
= NULL_TREE
;
672 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
673 /* We have something like:
678 and we are leaving the `for' scope. There's no reason to
679 keep the binding of the inner `i' in this case. */
680 pop_binding (name
, link
);
681 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
682 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
683 /* Here, we have something like:
691 We must pop the for-scope binding so we know what's a
692 type and what isn't. */
693 pop_binding (name
, link
);
696 /* Mark this VAR_DECL as dead so that we can tell we left it
697 there only for backward compatibility. */
698 DECL_DEAD_FOR_LOCAL (link
) = 1;
700 /* Keep track of what should have happened when we
701 popped the binding. */
704 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
705 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
708 /* Add it to the list of dead variables in the next
709 outermost binding to that we can remove these when we
710 leave that binding. */
712 current_binding_level
->level_chain
->dead_vars_from_for
,
715 /* Although we don't pop the cxx_binding, we do clear
716 its SCOPE since the scope is going away now. */
717 IDENTIFIER_BINDING (name
)->scope
718 = current_binding_level
->level_chain
;
725 /* Remove the binding. */
728 if (TREE_CODE (decl
) == TREE_LIST
)
729 decl
= TREE_VALUE (decl
);
732 if (TREE_CODE (name
) == OVERLOAD
)
733 name
= OVL_FUNCTION (name
);
735 gcc_assert (DECL_P (name
));
736 pop_binding (DECL_NAME (name
), decl
);
740 /* Remove declarations for any `for' variables from inner scopes
741 that we kept around. */
742 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
744 pop_binding (DECL_NAME (decl
), decl
);
746 /* Restore the IDENTIFIER_TYPE_VALUEs. */
747 for (link
= current_binding_level
->type_shadowed
;
748 link
; link
= TREE_CHAIN (link
))
749 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
751 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
752 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
754 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
756 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
757 list if a `using' declaration put them there. The debugging
758 back ends won't understand OVERLOAD, so we remove them here.
759 Because the BLOCK_VARS are (temporarily) shared with
760 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
761 popped all the bindings. */
766 for (d
= &BLOCK_VARS (block
); *d
; )
768 if (TREE_CODE (*d
) == TREE_LIST
)
769 *d
= TREE_CHAIN (*d
);
771 d
= &DECL_CHAIN (*d
);
775 /* If the level being exited is the top level of a function,
776 check over all the labels. */
779 /* Since this is the top level block of a function, the vars are
780 the function's parameters. Don't leave them in the BLOCK
781 because they are found in the FUNCTION_DECL instead. */
782 BLOCK_VARS (block
) = 0;
786 kind
= current_binding_level
->kind
;
787 if (kind
== sk_cleanup
)
791 /* If this is a temporary binding created for a cleanup, then we'll
792 have pushed a statement list level. Pop that, create a new
793 BIND_EXPR for the block, and insert it into the stream. */
794 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
795 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
802 /* The current function is being defined, so its DECL_INITIAL
803 should be error_mark_node. */
804 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
805 DECL_INITIAL (current_function_decl
) = block
;
808 current_binding_level
->blocks
809 = block_chainon (current_binding_level
->blocks
, block
);
811 /* If we did not make a block for the level just exited,
812 any blocks made for inner levels
813 (since they cannot be recorded as subblocks in that level)
814 must be carried forward so they will later become subblocks
815 of something else. */
817 current_binding_level
->blocks
818 = block_chainon (current_binding_level
->blocks
, subblocks
);
820 /* Each and every BLOCK node created here in `poplevel' is important
821 (e.g. for proper debugging information) so if we created one
822 earlier, mark it as "used". */
824 TREE_USED (block
) = 1;
826 /* All temporary bindings created for cleanups are popped silently. */
827 if (kind
== sk_cleanup
)
830 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
834 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
835 itself, calling F for each. The DATA is passed to F as well. */
838 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
841 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
843 result
|= (*f
) (name_space
, data
);
845 for (; current
; current
= DECL_CHAIN (current
))
846 result
|= walk_namespaces_r (current
, f
, data
);
851 /* Walk all the namespaces, calling F for each. The DATA is passed to
855 walk_namespaces (walk_namespaces_fn f
, void* data
)
857 return walk_namespaces_r (global_namespace
, f
, data
);
860 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
861 DATA is non-NULL, this is the last time we will call
862 wrapup_global_declarations for this NAMESPACE. */
865 wrapup_globals_for_namespace (tree name_space
, void* data
)
867 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
868 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
869 tree
*vec
= statics
->address ();
870 int len
= statics
->length ();
871 int last_time
= (data
!= 0);
875 check_global_declarations (vec
, len
);
876 emit_debug_global_declarations (vec
, len
);
880 /* Write out any globals that need to be output. */
881 return wrapup_global_declarations (vec
, len
);
885 /* In C++, you don't have to write `struct S' to refer to `S'; you
886 can just use `S'. We accomplish this by creating a TYPE_DECL as
887 if the user had written `typedef struct S S'. Create and return
888 the TYPE_DECL for TYPE. */
891 create_implicit_typedef (tree name
, tree type
)
895 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
896 DECL_ARTIFICIAL (decl
) = 1;
897 /* There are other implicit type declarations, like the one *within*
898 a class that allows you to write `S::S'. We must distinguish
900 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
901 TYPE_NAME (type
) = decl
;
902 TYPE_STUB_DECL (type
) = decl
;
907 /* Remember a local name for name-mangling purposes. */
910 push_local_name (tree decl
)
915 timevar_start (TV_NAME_LOOKUP
);
917 name
= DECL_NAME (decl
);
919 nelts
= vec_safe_length (local_names
);
920 for (i
= 0; i
< nelts
; i
++)
922 t
= (*local_names
)[i
];
923 if (DECL_NAME (t
) == name
)
925 if (!DECL_LANG_SPECIFIC (decl
))
926 retrofit_lang_decl (decl
);
927 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
928 if (DECL_DISCRIMINATOR_SET_P (t
))
929 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
931 DECL_DISCRIMINATOR (decl
) = 1;
933 (*local_names
)[i
] = decl
;
934 timevar_stop (TV_NAME_LOOKUP
);
939 vec_safe_push (local_names
, decl
);
940 timevar_stop (TV_NAME_LOOKUP
);
943 /* Subroutine of duplicate_decls: return truthvalue of whether
944 or not types of these decls match.
946 For C++, we must compare the parameter list so that `int' can match
947 `int&' in a parameter position, but `int&' is not confused with
951 decls_match (tree newdecl
, tree olddecl
)
955 if (newdecl
== olddecl
)
958 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
959 /* If the two DECLs are not even the same kind of thing, we're not
960 interested in their types. */
963 gcc_assert (DECL_P (newdecl
));
965 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
967 tree f1
= TREE_TYPE (newdecl
);
968 tree f2
= TREE_TYPE (olddecl
);
969 tree p1
= TYPE_ARG_TYPES (f1
);
970 tree p2
= TYPE_ARG_TYPES (f2
);
973 /* Specializations of different templates are different functions
974 even if they have the same type. */
975 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
976 ? DECL_TI_TEMPLATE (newdecl
)
978 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
979 ? DECL_TI_TEMPLATE (olddecl
)
984 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
985 && ! (DECL_EXTERN_C_P (newdecl
)
986 && DECL_EXTERN_C_P (olddecl
)))
989 /* A new declaration doesn't match a built-in one unless it
990 is also extern "C". */
991 if (DECL_IS_BUILTIN (olddecl
)
992 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
995 if (TREE_CODE (f1
) != TREE_CODE (f2
))
998 /* A declaration with deduced return type should use its pre-deduction
999 type for declaration matching. */
1000 r2
= fndecl_declared_return_type (olddecl
);
1002 if (same_type_p (TREE_TYPE (f1
), r2
))
1004 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1005 && (DECL_BUILT_IN (olddecl
)
1006 #ifndef NO_IMPLICIT_EXTERN_C
1007 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1008 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1012 types_match
= self_promoting_args_p (p1
);
1013 if (p1
== void_list_node
)
1014 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1016 #ifndef NO_IMPLICIT_EXTERN_C
1017 else if (!prototype_p (f1
)
1018 && (DECL_EXTERN_C_P (olddecl
)
1019 && DECL_IN_SYSTEM_HEADER (olddecl
)
1020 && !DECL_CLASS_SCOPE_P (olddecl
))
1021 && (DECL_EXTERN_C_P (newdecl
)
1022 && DECL_IN_SYSTEM_HEADER (newdecl
)
1023 && !DECL_CLASS_SCOPE_P (newdecl
)))
1025 types_match
= self_promoting_args_p (p2
);
1026 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1032 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1033 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1034 || comp_type_attributes (TREE_TYPE (newdecl
),
1035 TREE_TYPE (olddecl
)) != 0);
1040 /* The decls dont match if they correspond to two different versions
1041 of the same function. Disallow extern "C" functions to be
1042 versions for now. */
1044 && !DECL_EXTERN_C_P (newdecl
)
1045 && !DECL_EXTERN_C_P (olddecl
)
1046 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1048 /* Mark functions as versions if necessary. Modify the mangled decl
1049 name if necessary. */
1050 if (DECL_FUNCTION_VERSIONED (newdecl
)
1051 && DECL_FUNCTION_VERSIONED (olddecl
))
1053 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1055 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1056 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1057 mangle_decl (newdecl
);
1059 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1061 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1062 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1063 mangle_decl (olddecl
);
1065 record_function_versions (olddecl
, newdecl
);
1069 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1071 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1072 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
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 (DECL_TEMPLATE_RESULT (olddecl
)),
1081 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1083 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1084 DECL_TEMPLATE_RESULT (newdecl
));
1088 /* Need to check scope for variable declaration (VAR_DECL).
1089 For typedef (TYPE_DECL), scope is ignored. */
1091 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1093 Two declarations for an object with C language linkage
1094 with the same name (ignoring the namespace that qualify
1095 it) that appear in different namespace scopes refer to
1097 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1100 if (TREE_TYPE (newdecl
) == error_mark_node
)
1101 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1102 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1103 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1104 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1107 types_match
= comptypes (TREE_TYPE (newdecl
),
1108 TREE_TYPE (olddecl
),
1109 COMPARE_REDECLARATION
);
1115 /* If NEWDECL is `static' and an `extern' was seen previously,
1116 warn about it. OLDDECL is the previous declaration.
1118 Note that this does not apply to the C++ case of declaring
1119 a variable `extern const' and then later `const'.
1121 Don't complain about built-in functions, since they are beyond
1122 the user's control. */
1125 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1127 if (TREE_CODE (newdecl
) == TYPE_DECL
1128 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1129 || TREE_CODE (newdecl
) == CONST_DECL
1130 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1133 /* Don't get confused by static member functions; that's a different
1135 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1136 && DECL_STATIC_FUNCTION_P (newdecl
))
1139 /* If the old declaration was `static', or the new one isn't, then
1140 everything is OK. */
1141 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1144 /* It's OK to declare a builtin function as `static'. */
1145 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1146 && DECL_ARTIFICIAL (olddecl
))
1149 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1150 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1153 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1154 function templates. If their exception specifications do not
1155 match, issue a diagnostic. */
1158 check_redeclaration_exception_specification (tree new_decl
,
1163 tree new_exceptions
;
1164 tree old_exceptions
;
1166 new_type
= TREE_TYPE (new_decl
);
1167 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1168 old_type
= TREE_TYPE (old_decl
);
1169 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1173 If any declaration of a function has an exception-specification,
1174 all declarations, including the definition and an explicit
1175 specialization, of that function shall have an
1176 exception-specification with the same set of type-ids. */
1177 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1178 && ! DECL_IS_BUILTIN (old_decl
)
1180 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1182 error ("declaration of %qF has a different exception specifier",
1184 error ("from previous declaration %q+F", old_decl
);
1188 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1189 Otherwise issue diagnostics. */
1192 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1194 old_decl
= STRIP_TEMPLATE (old_decl
);
1195 new_decl
= STRIP_TEMPLATE (new_decl
);
1196 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1197 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1199 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1200 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1202 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1204 if (DECL_BUILT_IN (old_decl
))
1206 /* Hide a built-in declaration. */
1207 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1208 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1211 /* 7.1.5 [dcl.constexpr]
1212 Note: An explicit specialization can differ from the template
1213 declaration with respect to the constexpr specifier. */
1214 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1215 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1218 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1219 error ("from previous declaration %q+D", old_decl
);
1223 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1224 && lookup_attribute ("gnu_inline", \
1225 DECL_ATTRIBUTES (fn)))
1227 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1228 If the redeclaration is invalid, a diagnostic is issued, and the
1229 error_mark_node is returned. Otherwise, OLDDECL is returned.
1231 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1234 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1237 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1239 unsigned olddecl_uid
= DECL_UID (olddecl
);
1240 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1241 int new_defines_function
= 0;
1242 tree new_template_info
;
1244 if (newdecl
== olddecl
)
1247 types_match
= decls_match (newdecl
, olddecl
);
1249 /* If either the type of the new decl or the type of the old decl is an
1250 error_mark_node, then that implies that we have already issued an
1251 error (earlier) for some bogus type specification, and in that case,
1252 it is rather pointless to harass the user with yet more error message
1253 about the same declaration, so just pretend the types match here. */
1254 if (TREE_TYPE (newdecl
) == error_mark_node
1255 || TREE_TYPE (olddecl
) == error_mark_node
)
1256 return error_mark_node
;
1258 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1259 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1261 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1262 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1263 && check_raw_literal_operator (olddecl
))
1264 error ("literal operator template %q+D conflicts with"
1265 " raw literal operator %qD", newdecl
, olddecl
);
1266 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1267 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1268 && check_raw_literal_operator (newdecl
))
1269 error ("raw literal operator %q+D conflicts with"
1270 " literal operator template %qD", newdecl
, olddecl
);
1273 if (DECL_P (olddecl
)
1274 && TREE_CODE (newdecl
) == FUNCTION_DECL
1275 && TREE_CODE (olddecl
) == FUNCTION_DECL
1276 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1278 if (DECL_DECLARED_INLINE_P (newdecl
)
1279 && DECL_UNINLINABLE (newdecl
)
1280 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1281 /* Already warned elsewhere. */;
1282 else if (DECL_DECLARED_INLINE_P (olddecl
)
1283 && DECL_UNINLINABLE (olddecl
)
1284 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1285 /* Already warned. */;
1286 else if (DECL_DECLARED_INLINE_P (newdecl
)
1287 && DECL_UNINLINABLE (olddecl
)
1288 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1290 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1292 warning (OPT_Wattributes
, "previous declaration of %q+D "
1293 "with attribute noinline", olddecl
);
1295 else if (DECL_DECLARED_INLINE_P (olddecl
)
1296 && DECL_UNINLINABLE (newdecl
)
1297 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1299 warning (OPT_Wattributes
, "function %q+D redeclared with "
1300 "attribute noinline", newdecl
);
1301 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1306 /* Check for redeclaration and other discrepancies. */
1307 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1308 && DECL_ARTIFICIAL (olddecl
))
1310 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1311 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1313 /* Avoid warnings redeclaring built-ins which have not been
1314 explicitly declared. */
1315 if (DECL_ANTICIPATED (olddecl
))
1318 /* If you declare a built-in or predefined function name as static,
1319 the old definition is overridden, but optionally warn this was a
1320 bad choice of name. */
1321 if (! TREE_PUBLIC (newdecl
))
1323 warning (OPT_Wshadow
,
1324 DECL_BUILT_IN (olddecl
)
1325 ? G_("shadowing built-in function %q#D")
1326 : G_("shadowing library function %q#D"), olddecl
);
1327 /* Discard the old built-in function. */
1330 /* If the built-in is not ansi, then programs can override
1331 it even globally without an error. */
1332 else if (! DECL_BUILT_IN (olddecl
))
1333 warning (0, "library function %q#D redeclared as non-function %q#D",
1337 error ("declaration of %q#D", newdecl
);
1338 error ("conflicts with built-in declaration %q#D",
1343 else if (!types_match
)
1345 /* Avoid warnings redeclaring built-ins which have not been
1346 explicitly declared. */
1347 if (DECL_ANTICIPATED (olddecl
))
1349 /* Deal with fileptr_type_node. FILE type is not known
1350 at the time we create the builtins. */
1353 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1354 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1356 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1359 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1361 tree t
= TREE_VALUE (t1
);
1364 && TYPE_NAME (TREE_TYPE (t
))
1365 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1366 == get_identifier ("FILE")
1367 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1369 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1371 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1372 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1373 types_match
= decls_match (newdecl
, olddecl
);
1375 return duplicate_decls (newdecl
, olddecl
,
1377 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1380 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1383 else if ((DECL_EXTERN_C_P (newdecl
)
1384 && DECL_EXTERN_C_P (olddecl
))
1385 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1386 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1388 /* A near match; override the builtin. */
1390 if (TREE_PUBLIC (newdecl
))
1392 warning (0, "new declaration %q#D", newdecl
);
1393 warning (0, "ambiguates built-in declaration %q#D",
1397 warning (OPT_Wshadow
,
1398 DECL_BUILT_IN (olddecl
)
1399 ? G_("shadowing built-in function %q#D")
1400 : G_("shadowing library function %q#D"), olddecl
);
1403 /* Discard the old built-in function. */
1406 /* Replace the old RTL to avoid problems with inlining. */
1407 COPY_DECL_RTL (newdecl
, olddecl
);
1409 /* Even if the types match, prefer the new declarations type for
1410 built-ins which have not been explicitly declared, for
1411 exception lists, etc... */
1412 else if (DECL_IS_BUILTIN (olddecl
))
1414 tree type
= TREE_TYPE (newdecl
);
1415 tree attribs
= (*targetm
.merge_type_attributes
)
1416 (TREE_TYPE (olddecl
), type
);
1418 type
= cp_build_type_attribute_variant (type
, attribs
);
1419 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1422 /* If a function is explicitly declared "throw ()", propagate that to
1423 the corresponding builtin. */
1424 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1425 && DECL_ANTICIPATED (olddecl
)
1426 && TREE_NOTHROW (newdecl
)
1427 && !TREE_NOTHROW (olddecl
))
1429 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1430 tree tmpdecl
= builtin_decl_explicit (fncode
);
1431 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1432 TREE_NOTHROW (tmpdecl
) = 1;
1435 /* Whether or not the builtin can throw exceptions has no
1436 bearing on this declarator. */
1437 TREE_NOTHROW (olddecl
) = 0;
1439 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1441 /* If a builtin function is redeclared as `static', merge
1442 the declarations, but make the original one static. */
1443 DECL_THIS_STATIC (olddecl
) = 1;
1444 TREE_PUBLIC (olddecl
) = 0;
1446 /* Make the old declaration consistent with the new one so
1447 that all remnants of the builtin-ness of this function
1448 will be banished. */
1449 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1450 COPY_DECL_RTL (newdecl
, olddecl
);
1453 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1455 /* C++ Standard, 3.3, clause 4:
1456 "[Note: a namespace name or a class template name must be unique
1457 in its declarative region (7.3.2, clause 14). ]" */
1458 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1459 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1460 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1461 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1462 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1463 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1465 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1466 && TREE_CODE (newdecl
) != TYPE_DECL
)
1467 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1468 && TREE_CODE (olddecl
) != TYPE_DECL
))
1470 /* We do nothing special here, because C++ does such nasty
1471 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1472 get shadowed, and know that if we need to find a TYPE_DECL
1473 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1474 slot of the identifier. */
1478 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1479 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1480 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1481 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1485 error ("%q#D redeclared as different kind of symbol", newdecl
);
1486 if (TREE_CODE (olddecl
) == TREE_LIST
)
1487 olddecl
= TREE_VALUE (olddecl
);
1488 error ("previous declaration of %q+#D", olddecl
);
1490 return error_mark_node
;
1492 else if (!types_match
)
1494 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1495 /* These are certainly not duplicate declarations; they're
1496 from different scopes. */
1499 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1501 /* The name of a class template may not be declared to refer to
1502 any other template, class, function, object, namespace, value,
1503 or type in the same scope. */
1504 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1505 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1507 error ("declaration of template %q#D", newdecl
);
1508 error ("conflicts with previous declaration %q+#D", olddecl
);
1509 return error_mark_node
;
1511 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1512 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1513 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1514 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1515 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1516 DECL_TEMPLATE_PARMS (olddecl
))
1517 /* Template functions can be disambiguated by
1519 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1520 TREE_TYPE (TREE_TYPE (olddecl
))))
1522 error ("new declaration %q#D", newdecl
);
1523 error ("ambiguates old declaration %q+#D", olddecl
);
1527 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1529 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1531 error ("declaration of C function %q#D conflicts with",
1533 error ("previous declaration %q+#D here", olddecl
);
1536 /* For function versions, params and types match, but they
1537 are not ambiguous. */
1538 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1539 && !DECL_FUNCTION_VERSIONED (olddecl
))
1540 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1541 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1543 error ("new declaration %q#D", newdecl
);
1544 error ("ambiguates old declaration %q+#D", olddecl
);
1545 return error_mark_node
;
1552 error ("conflicting declaration %q#D", newdecl
);
1553 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1554 return error_mark_node
;
1557 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1558 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1559 && (!DECL_TEMPLATE_INFO (newdecl
)
1560 || (DECL_TI_TEMPLATE (newdecl
)
1561 != DECL_TI_TEMPLATE (olddecl
))))
1562 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1563 && (!DECL_TEMPLATE_INFO (olddecl
)
1564 || (DECL_TI_TEMPLATE (olddecl
)
1565 != DECL_TI_TEMPLATE (newdecl
))))))
1566 /* It's OK to have a template specialization and a non-template
1567 with the same type, or to have specializations of two
1568 different templates with the same type. Note that if one is a
1569 specialization, and the other is an instantiation of the same
1570 template, that we do not exit at this point. That situation
1571 can occur if we instantiate a template class, and then
1572 specialize one of its methods. This situation is valid, but
1573 the declarations must be merged in the usual way. */
1575 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1576 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1577 && !DECL_USE_TEMPLATE (newdecl
))
1578 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1579 && !DECL_USE_TEMPLATE (olddecl
))))
1580 /* One of the declarations is a template instantiation, and the
1581 other is not a template at all. That's OK. */
1583 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1585 /* In [namespace.alias] we have:
1587 In a declarative region, a namespace-alias-definition can be
1588 used to redefine a namespace-alias declared in that declarative
1589 region to refer only to the namespace to which it already
1592 Therefore, if we encounter a second alias directive for the same
1593 alias, we can just ignore the second directive. */
1594 if (DECL_NAMESPACE_ALIAS (newdecl
)
1595 && (DECL_NAMESPACE_ALIAS (newdecl
)
1596 == DECL_NAMESPACE_ALIAS (olddecl
)))
1598 /* [namespace.alias]
1600 A namespace-name or namespace-alias shall not be declared as
1601 the name of any other entity in the same declarative region.
1602 A namespace-name defined at global scope shall not be
1603 declared as the name of any other entity in any global scope
1605 error ("declaration of namespace %qD conflicts with", newdecl
);
1606 error ("previous declaration of namespace %q+D here", olddecl
);
1607 return error_mark_node
;
1611 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1614 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1615 if (DECL_NAME (olddecl
) != NULL_TREE
)
1616 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1617 ? G_("%q+#D previously defined here")
1618 : G_("%q+#D previously declared here"), olddecl
);
1619 return error_mark_node
;
1621 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1622 && DECL_INITIAL (olddecl
) != NULL_TREE
1623 && !prototype_p (TREE_TYPE (olddecl
))
1624 && prototype_p (TREE_TYPE (newdecl
)))
1626 /* Prototype decl follows defn w/o prototype. */
1627 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1628 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1629 "follows non-prototype definition here");
1631 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1632 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1635 If two declarations of the same function or object
1636 specify different linkage-specifications ..., the program
1637 is ill-formed.... Except for functions with C++ linkage,
1638 a function declaration without a linkage specification
1639 shall not precede the first linkage specification for
1640 that function. A function can be declared without a
1641 linkage specification after an explicit linkage
1642 specification has been seen; the linkage explicitly
1643 specified in the earlier declaration is not affected by
1644 such a function declaration.
1646 DR 563 raises the question why the restrictions on
1647 functions should not also apply to objects. Older
1648 versions of G++ silently ignore the linkage-specification
1656 which is clearly wrong. Therefore, we now treat objects
1658 if (current_lang_depth () == 0)
1660 /* There is no explicit linkage-specification, so we use
1661 the linkage from the previous declaration. */
1662 if (!DECL_LANG_SPECIFIC (newdecl
))
1663 retrofit_lang_decl (newdecl
);
1664 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1668 error ("previous declaration of %q+#D with %qL linkage",
1669 olddecl
, DECL_LANGUAGE (olddecl
));
1670 error ("conflicts with new declaration with %qL linkage",
1671 DECL_LANGUAGE (newdecl
));
1675 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1677 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1679 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1680 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1683 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1684 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1686 for (; t1
&& t1
!= void_list_node
;
1687 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1688 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1690 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1693 permerror (input_location
, "default argument given for parameter %d of %q#D",
1695 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1699 error ("default argument given for parameter %d of %q#D",
1701 error ("after previous specification in %q+#D",
1708 /* Do not merge an implicit typedef with an explicit one. In:
1712 typedef class A A __attribute__ ((foo));
1714 the attribute should apply only to the typedef. */
1715 if (TREE_CODE (olddecl
) == TYPE_DECL
1716 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1717 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1720 /* If new decl is `static' and an `extern' was seen previously,
1722 warn_extern_redeclared_static (newdecl
, olddecl
);
1724 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1725 return error_mark_node
;
1727 /* We have committed to returning 1 at this point. */
1728 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1730 /* Now that functions must hold information normally held
1731 by field decls, there is extra work to do so that
1732 declaration information does not get destroyed during
1734 if (DECL_VINDEX (olddecl
))
1735 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1736 if (DECL_CONTEXT (olddecl
))
1737 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1738 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1739 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1740 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1741 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1742 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1743 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1744 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1745 SET_OVERLOADED_OPERATOR_CODE
1746 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1747 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1749 /* Optionally warn about more than one declaration for the same
1750 name, but don't warn about a function declaration followed by a
1752 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1753 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1754 /* Don't warn about extern decl followed by definition. */
1755 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1756 /* Don't warn about friends, let add_friend take care of it. */
1757 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1758 /* Don't warn about declaration followed by specialization. */
1759 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1760 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1762 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1763 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1766 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1767 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1769 if (DECL_DELETED_FN (newdecl
))
1771 error ("deleted definition of %qD", newdecl
);
1772 error ("after previous declaration %q+D", olddecl
);
1774 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1778 /* Deal with C++: must preserve virtual function table size. */
1779 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1781 tree newtype
= TREE_TYPE (newdecl
);
1782 tree oldtype
= TREE_TYPE (olddecl
);
1784 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1785 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1786 CLASSTYPE_FRIEND_CLASSES (newtype
)
1787 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1789 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1792 /* Copy all the DECL_... slots specified in the new decl
1793 except for any that we copy here from the old type. */
1794 DECL_ATTRIBUTES (newdecl
)
1795 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1797 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1801 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1802 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1803 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1804 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1805 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1806 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1808 DECL_ATTRIBUTES (old_result
)
1809 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1811 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1813 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1814 && DECL_INITIAL (new_result
))
1816 if (DECL_INITIAL (old_result
))
1817 DECL_UNINLINABLE (old_result
) = 1;
1819 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1820 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1821 DECL_NOT_REALLY_EXTERN (old_result
)
1822 = DECL_NOT_REALLY_EXTERN (new_result
);
1823 DECL_INTERFACE_KNOWN (old_result
)
1824 = DECL_INTERFACE_KNOWN (new_result
);
1825 DECL_DECLARED_INLINE_P (old_result
)
1826 = DECL_DECLARED_INLINE_P (new_result
);
1827 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1828 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1833 DECL_DECLARED_INLINE_P (old_result
)
1834 |= DECL_DECLARED_INLINE_P (new_result
);
1835 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1836 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1837 check_redeclaration_exception_specification (newdecl
, olddecl
);
1841 /* If the new declaration is a definition, update the file and
1842 line information on the declaration, and also make
1843 the old declaration the same definition. */
1844 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1846 DECL_SOURCE_LOCATION (olddecl
)
1847 = DECL_SOURCE_LOCATION (old_result
)
1848 = DECL_SOURCE_LOCATION (newdecl
);
1849 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1850 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1853 DECL_ARGUMENTS (old_result
)
1854 = DECL_ARGUMENTS (new_result
);
1855 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1856 parm
= DECL_CHAIN (parm
))
1857 DECL_CONTEXT (parm
) = old_result
;
1866 /* Automatically handles default parameters. */
1867 tree oldtype
= TREE_TYPE (olddecl
);
1870 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1871 maybe_instantiate_noexcept (olddecl
);
1873 /* Merge the data types specified in the two decls. */
1874 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1876 /* If merge_types produces a non-typedef type, just use the old type. */
1877 if (TREE_CODE (newdecl
) == TYPE_DECL
1878 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1881 if (VAR_P (newdecl
))
1883 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1884 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1885 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1886 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1887 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1888 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1890 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1891 if (DECL_LANG_SPECIFIC (olddecl
)
1892 && CP_DECL_THREADPRIVATE_P (olddecl
))
1894 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1895 if (!DECL_LANG_SPECIFIC (newdecl
))
1896 retrofit_lang_decl (newdecl
);
1898 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1899 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1903 /* Do this after calling `merge_types' so that default
1904 parameters don't confuse us. */
1905 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1906 check_redeclaration_exception_specification (newdecl
, olddecl
);
1907 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1909 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1910 check_default_args (newdecl
);
1912 /* Lay the type out, unless already done. */
1913 if (! same_type_p (newtype
, oldtype
)
1914 && TREE_TYPE (newdecl
) != error_mark_node
1915 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1916 layout_type (TREE_TYPE (newdecl
));
1918 if ((VAR_P (newdecl
)
1919 || TREE_CODE (newdecl
) == PARM_DECL
1920 || TREE_CODE (newdecl
) == RESULT_DECL
1921 || TREE_CODE (newdecl
) == FIELD_DECL
1922 || TREE_CODE (newdecl
) == TYPE_DECL
)
1923 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1924 layout_decl (newdecl
, 0);
1926 /* Merge the type qualifiers. */
1927 if (TREE_READONLY (newdecl
))
1928 TREE_READONLY (olddecl
) = 1;
1929 if (TREE_THIS_VOLATILE (newdecl
))
1930 TREE_THIS_VOLATILE (olddecl
) = 1;
1931 if (TREE_NOTHROW (newdecl
))
1932 TREE_NOTHROW (olddecl
) = 1;
1934 /* Merge deprecatedness. */
1935 if (TREE_DEPRECATED (newdecl
))
1936 TREE_DEPRECATED (olddecl
) = 1;
1938 /* Preserve function specific target and optimization options */
1939 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1941 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1942 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1943 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1944 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1946 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1947 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1948 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1949 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1952 /* Merge the initialization information. */
1953 if (DECL_INITIAL (newdecl
) == NULL_TREE
1954 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1956 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1957 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1958 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1960 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1961 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1965 /* Merge the section attribute.
1966 We want to issue an error if the sections conflict but that must be
1967 done later in decl_attributes since we are called before attributes
1969 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1970 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1972 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1974 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1975 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1976 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1977 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1978 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1979 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1980 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1981 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1982 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1983 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1984 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1985 /* Keep the old RTL. */
1986 COPY_DECL_RTL (olddecl
, newdecl
);
1988 else if (VAR_P (newdecl
)
1989 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1991 /* Keep the old RTL. We cannot keep the old RTL if the old
1992 declaration was for an incomplete object and the new
1993 declaration is not since many attributes of the RTL will
1995 COPY_DECL_RTL (olddecl
, newdecl
);
1998 /* If cannot merge, then use the new type and qualifiers,
1999 and don't preserve the old rtl. */
2002 /* Clean out any memory we had of the old declaration. */
2003 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2005 TREE_VALUE (oldstatic
) = error_mark_node
;
2007 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2008 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2009 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2010 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2013 /* Merge the storage class information. */
2014 merge_weak (newdecl
, olddecl
);
2016 if (DECL_ONE_ONLY (olddecl
))
2017 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2019 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2020 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2021 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2022 if (! DECL_EXTERNAL (olddecl
))
2023 DECL_EXTERNAL (newdecl
) = 0;
2025 new_template_info
= NULL_TREE
;
2026 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2028 bool new_redefines_gnu_inline
= false;
2030 if (new_defines_function
2031 && ((DECL_INTERFACE_KNOWN (olddecl
)
2032 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2033 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2034 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2035 == FUNCTION_DECL
))))
2039 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2040 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2042 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2045 if (!new_redefines_gnu_inline
)
2047 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2048 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2049 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2051 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2052 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2053 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2055 /* If the OLDDECL is an instantiation and/or specialization,
2056 then the NEWDECL must be too. But, it may not yet be marked
2057 as such if the caller has created NEWDECL, but has not yet
2058 figured out that it is a redeclaration. */
2059 if (!DECL_USE_TEMPLATE (newdecl
))
2060 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2062 /* Don't really know how much of the language-specific
2063 values we should copy from old to new. */
2064 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2065 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2066 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2067 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2069 if (LANG_DECL_HAS_MIN (newdecl
))
2071 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2072 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2073 if (DECL_TEMPLATE_INFO (newdecl
))
2074 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2075 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2077 /* Only functions have these fields. */
2078 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2080 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2081 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2082 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2083 && DECL_HIDDEN_FRIEND_P (olddecl
)
2084 && newdecl_is_friend
);
2085 DECL_BEFRIENDING_CLASSES (newdecl
)
2086 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2087 DECL_BEFRIENDING_CLASSES (olddecl
));
2088 /* DECL_THUNKS is only valid for virtual functions,
2089 otherwise it is a DECL_FRIEND_CONTEXT. */
2090 if (DECL_VIRTUAL_P (newdecl
))
2091 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2093 /* Only variables have this field. */
2094 else if (VAR_P (newdecl
)
2095 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2096 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2099 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2103 /* Merge parameter attributes. */
2104 tree oldarg
, newarg
;
2105 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2106 newarg
= DECL_ARGUMENTS(newdecl
);
2108 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2109 DECL_ATTRIBUTES (newarg
)
2110 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2111 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2114 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2115 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2117 /* If newdecl is not a specialization, then it is not a
2118 template-related function at all. And that means that we
2119 should have exited above, returning 0. */
2120 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2122 if (DECL_ODR_USED (olddecl
))
2123 /* From [temp.expl.spec]:
2125 If a template, a member template or the member of a class
2126 template is explicitly specialized then that
2127 specialization shall be declared before the first use of
2128 that specialization that would cause an implicit
2129 instantiation to take place, in every translation unit in
2130 which such a use occurs. */
2131 error ("explicit specialization of %qD after first use",
2134 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2136 /* Don't propagate visibility from the template to the
2137 specialization here. We'll do that in determine_visibility if
2139 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2141 /* [temp.expl.spec/14] We don't inline explicit specialization
2142 just because the primary template says so. */
2144 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2145 the always_inline attribute. */
2146 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2147 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2149 if (DECL_DECLARED_INLINE_P (newdecl
))
2150 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2152 DECL_ATTRIBUTES (newdecl
)
2153 = remove_attribute ("always_inline",
2154 DECL_ATTRIBUTES (newdecl
));
2157 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2159 /* Never inline re-defined extern inline functions.
2160 FIXME: this could be better handled by keeping both
2161 function as separate declarations. */
2162 DECL_UNINLINABLE (newdecl
) = 1;
2166 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2167 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2169 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2171 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2172 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2174 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2175 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2176 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2177 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2180 /* Preserve abstractness on cloned [cd]tors. */
2181 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2183 /* Update newdecl's parms to point at olddecl. */
2184 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2185 parm
= DECL_CHAIN (parm
))
2186 DECL_CONTEXT (parm
) = olddecl
;
2190 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2191 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2192 COPY_DECL_RTL (newdecl
, olddecl
);
2194 if (! types_match
|| new_defines_function
)
2196 /* These need to be copied so that the names are available.
2197 Note that if the types do match, we'll preserve inline
2198 info and other bits, but if not, we won't. */
2199 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2200 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2202 /* If redeclaring a builtin function, it stays built in
2203 if newdecl is a gnu_inline definition, or if newdecl is just
2205 if (DECL_BUILT_IN (olddecl
)
2206 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2208 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2209 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2210 /* If we're keeping the built-in definition, keep the rtl,
2211 regardless of declaration matches. */
2212 COPY_DECL_RTL (olddecl
, newdecl
);
2213 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2215 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2218 /* If a compatible prototype of these builtin functions
2219 is seen, assume the runtime implements it with the
2220 expected semantics. */
2221 case BUILT_IN_STPCPY
:
2222 if (builtin_decl_explicit_p (fncode
))
2223 set_builtin_decl_implicit_p (fncode
, true);
2230 if (new_defines_function
)
2231 /* If defining a function declared with other language
2232 linkage, use the previously declared language linkage. */
2233 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2234 else if (types_match
)
2236 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2237 /* Don't clear out the arguments if we're just redeclaring a
2239 if (DECL_ARGUMENTS (olddecl
))
2240 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2243 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2244 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2246 /* Now preserve various other info from the definition. */
2247 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2248 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2249 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2250 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2252 /* Warn about conflicting visibility specifications. */
2253 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2254 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2255 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2257 warning_at (input_location
, OPT_Wattributes
,
2258 "%q+D: visibility attribute ignored because it", newdecl
);
2259 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2260 "conflicts with previous declaration here");
2262 /* Choose the declaration which specified visibility. */
2263 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2265 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2266 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2268 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2269 so keep this behavior. */
2270 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2272 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2273 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2275 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2276 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2278 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2279 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2281 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2282 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2283 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2285 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2286 with that from NEWDECL below. */
2287 if (DECL_LANG_SPECIFIC (olddecl
))
2289 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2290 != DECL_LANG_SPECIFIC (newdecl
));
2291 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2294 /* Merge the USED information. */
2295 if (TREE_USED (olddecl
))
2296 TREE_USED (newdecl
) = 1;
2297 else if (TREE_USED (newdecl
))
2298 TREE_USED (olddecl
) = 1;
2299 if (VAR_P (newdecl
))
2301 if (DECL_READ_P (olddecl
))
2302 DECL_READ_P (newdecl
) = 1;
2303 else if (DECL_READ_P (newdecl
))
2304 DECL_READ_P (olddecl
) = 1;
2306 if (DECL_PRESERVE_P (olddecl
))
2307 DECL_PRESERVE_P (newdecl
) = 1;
2308 else if (DECL_PRESERVE_P (newdecl
))
2309 DECL_PRESERVE_P (olddecl
) = 1;
2311 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2312 to olddecl and deleted. */
2313 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2314 && DECL_FUNCTION_VERSIONED (olddecl
))
2316 /* Set the flag for newdecl so that it gets copied to olddecl. */
2317 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2318 /* newdecl will be purged after copying to olddecl and is no longer
2320 delete_function_version (newdecl
);
2323 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2327 function_size
= sizeof (struct tree_decl_common
);
2329 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2330 (char *) newdecl
+ sizeof (struct tree_common
),
2331 function_size
- sizeof (struct tree_common
));
2333 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2334 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2335 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2336 if (new_template_info
)
2337 /* If newdecl is a template instantiation, it is possible that
2338 the following sequence of events has occurred:
2340 o A friend function was declared in a class template. The
2341 class template was instantiated.
2343 o The instantiation of the friend declaration was
2344 recorded on the instantiation list, and is newdecl.
2346 o Later, however, instantiate_class_template called pushdecl
2347 on the newdecl to perform name injection. But, pushdecl in
2348 turn called duplicate_decls when it discovered that another
2349 declaration of a global function with the same name already
2352 o Here, in duplicate_decls, we decided to clobber newdecl.
2354 If we're going to do that, we'd better make sure that
2355 olddecl, and not newdecl, is on the list of
2356 instantiations so that if we try to do the instantiation
2357 again we won't get the clobbered declaration. */
2358 reregister_specialization (newdecl
,
2364 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2365 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2366 (char *) newdecl
+ sizeof (struct tree_common
),
2367 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2368 switch (TREE_CODE (olddecl
))
2378 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2379 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2380 size
- sizeof (struct tree_decl_common
)
2381 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2385 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2386 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2387 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2388 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2392 DECL_UID (olddecl
) = olddecl_uid
;
2394 DECL_FRIEND_P (olddecl
) = 1;
2397 DECL_ANTICIPATED (olddecl
) = 1;
2398 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2401 /* NEWDECL contains the merged attribute lists.
2402 Update OLDDECL to be the same. */
2403 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2405 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2406 so that encode_section_info has a chance to look at the new decl
2407 flags and attributes. */
2408 if (DECL_RTL_SET_P (olddecl
)
2409 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2411 && TREE_STATIC (olddecl
))))
2412 make_decl_rtl (olddecl
);
2414 /* The NEWDECL will no longer be needed. Because every out-of-class
2415 declaration of a member results in a call to duplicate_decls,
2416 freeing these nodes represents in a significant savings. */
2422 /* Return zero if the declaration NEWDECL is valid
2423 when the declaration OLDDECL (assumed to be for the same name)
2424 has already been seen.
2425 Otherwise return an error message format string with a %s
2426 where the identifier should go. */
2429 redeclaration_error_message (tree newdecl
, tree olddecl
)
2431 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2433 /* Because C++ can put things into name space for free,
2434 constructs like "typedef struct foo { ... } foo"
2435 would look like an erroneous redeclaration. */
2436 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2439 return G_("redefinition of %q#D");
2441 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2443 /* If this is a pure function, its olddecl will actually be
2444 the original initialization to `0' (which we force to call
2445 abort()). Don't complain about redefinition in this case. */
2446 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2447 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2450 /* If both functions come from different namespaces, this is not
2451 a redeclaration - this is a conflict with a used function. */
2452 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2453 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2454 && ! decls_match (olddecl
, newdecl
))
2455 return G_("%qD conflicts with used function");
2457 /* We'll complain about linkage mismatches in
2458 warn_extern_redeclared_static. */
2460 /* Defining the same name twice is no good. */
2461 if (DECL_INITIAL (olddecl
) != NULL_TREE
2462 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2464 if (DECL_NAME (olddecl
) == NULL_TREE
)
2465 return G_("%q#D not declared in class");
2466 else if (!GNU_INLINE_P (olddecl
)
2467 || GNU_INLINE_P (newdecl
))
2468 return G_("redefinition of %q#D");
2471 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2473 bool olda
= GNU_INLINE_P (olddecl
);
2474 bool newa
= GNU_INLINE_P (newdecl
);
2479 return G_("%q+D redeclared inline with "
2480 "%<gnu_inline%> attribute");
2482 return G_("%q+D redeclared inline without "
2483 "%<gnu_inline%> attribute");
2487 check_abi_tag_redeclaration
2488 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2489 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2493 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2497 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2499 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2500 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2501 return G_("redefinition of %q#D");
2505 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2506 || (DECL_TEMPLATE_RESULT (newdecl
)
2507 == DECL_TEMPLATE_RESULT (olddecl
)))
2510 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2511 if (DECL_TEMPLATE_INFO (nt
))
2512 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2513 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2514 if (DECL_TEMPLATE_INFO (ot
))
2515 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2516 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2517 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2518 return G_("redefinition of %q#D");
2520 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2522 bool olda
= GNU_INLINE_P (ot
);
2523 bool newa
= GNU_INLINE_P (nt
);
2528 return G_("%q+D redeclared inline with "
2529 "%<gnu_inline%> attribute");
2531 return G_("%q+D redeclared inline without "
2532 "%<gnu_inline%> attribute");
2536 /* Core issue #226 (C++0x):
2538 If a friend function template declaration specifies a
2539 default template-argument, that declaration shall be a
2540 definition and shall be the only declaration of the
2541 function template in the translation unit. */
2542 if ((cxx_dialect
!= cxx98
)
2543 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2544 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2545 /*is_primary=*/true,
2546 /*is_partial=*/false,
2547 /*is_friend_decl=*/2))
2548 return G_("redeclaration of friend %q#D "
2549 "may not have default template arguments");
2553 else if (VAR_P (newdecl
)
2554 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2555 && (! DECL_LANG_SPECIFIC (olddecl
)
2556 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2557 || DECL_THREAD_LOCAL_P (newdecl
)))
2559 /* Only variables can be thread-local, and all declarations must
2560 agree on this property. */
2561 if (DECL_THREAD_LOCAL_P (newdecl
))
2562 return G_("thread-local declaration of %q#D follows "
2563 "non-thread-local declaration");
2565 return G_("non-thread-local declaration of %q#D follows "
2566 "thread-local declaration");
2568 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2570 /* The objects have been declared at namespace scope. If either
2571 is a member of an anonymous union, then this is an invalid
2572 redeclaration. For example:
2578 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2579 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2580 return G_("redeclaration of %q#D");
2581 /* If at least one declaration is a reference, there is no
2582 conflict. For example:
2588 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2590 /* Reject two definitions. */
2591 return G_("redefinition of %q#D");
2595 /* Objects declared with block scope: */
2596 /* Reject two definitions, and reject a definition
2597 together with an external reference. */
2598 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2599 return G_("redeclaration of %q#D");
2604 /* Hash and equality functions for the named_label table. */
2607 named_label_entry_hash (const void *data
)
2609 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2610 return DECL_UID (ent
->label_decl
);
2614 named_label_entry_eq (const void *a
, const void *b
)
2616 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2617 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2618 return ent_a
->label_decl
== ent_b
->label_decl
;
2621 /* Create a new label, named ID. */
2624 make_label_decl (tree id
, int local_p
)
2626 struct named_label_entry
*ent
;
2630 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2632 DECL_CONTEXT (decl
) = current_function_decl
;
2633 DECL_MODE (decl
) = VOIDmode
;
2634 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2636 /* Say where one reference is to the label, for the sake of the
2637 error if it is not defined. */
2638 DECL_SOURCE_LOCATION (decl
) = input_location
;
2640 /* Record the fact that this identifier is bound to this label. */
2641 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2643 /* Create the label htab for the function on demand. */
2645 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2646 named_label_entry_eq
, NULL
);
2648 /* Record this label on the list of labels used in this function.
2649 We do this before calling make_label_decl so that we get the
2650 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2651 ent
= ggc_alloc_cleared_named_label_entry ();
2652 ent
->label_decl
= decl
;
2654 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2655 gcc_assert (*slot
== NULL
);
2661 /* Look for a label named ID in the current function. If one cannot
2662 be found, create one. (We keep track of used, but undefined,
2663 labels, and complain about them at the end of a function.) */
2666 lookup_label_1 (tree id
)
2670 /* You can't use labels at global scope. */
2671 if (current_function_decl
== NULL_TREE
)
2673 error ("label %qE referenced outside of any function", id
);
2677 /* See if we've already got this label. */
2678 decl
= IDENTIFIER_LABEL_VALUE (id
);
2679 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2682 decl
= make_label_decl (id
, /*local_p=*/0);
2686 /* Wrapper for lookup_label_1. */
2689 lookup_label (tree id
)
2692 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2693 ret
= lookup_label_1 (id
);
2694 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2698 /* Declare a local label named ID. */
2701 declare_local_label (tree id
)
2704 cp_label_binding bind
;
2706 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2707 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2708 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2710 decl
= make_label_decl (id
, /*local_p=*/1);
2712 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2717 /* Returns nonzero if it is ill-formed to jump past the declaration of
2718 DECL. Returns 2 if it's also a real problem. */
2721 decl_jump_unsafe (tree decl
)
2723 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2724 with automatic storage duration is not in scope to a point where it is
2725 in scope is ill-formed unless the variable has scalar type, class type
2726 with a trivial default constructor and a trivial destructor, a
2727 cv-qualified version of one of these types, or an array of one of the
2728 preceding types and is declared without an initializer (8.5). */
2729 tree type
= TREE_TYPE (decl
);
2731 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2732 || type
== error_mark_node
)
2735 type
= strip_array_types (type
);
2737 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2740 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2746 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2749 identify_goto (tree decl
, const location_t
*locus
)
2752 permerror (input_location
, "jump to label %qD", decl
);
2754 permerror (input_location
, "jump to case label");
2756 permerror (*locus
, " from here");
2759 /* Check that a single previously seen jump to a newly defined label
2760 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2761 the jump context; NAMES are the names in scope in LEVEL at the jump
2762 context; LOCUS is the source position of the jump or 0. Returns
2763 true if all is well. */
2766 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2767 bool exited_omp
, const location_t
*locus
)
2769 cp_binding_level
*b
;
2770 bool identified
= false, saw_eh
= false, saw_omp
= false;
2774 identify_goto (decl
, locus
);
2775 error (" exits OpenMP structured block");
2776 identified
= saw_omp
= true;
2779 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2781 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2783 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2784 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2785 : TREE_CHAIN (new_decls
)))
2787 int problem
= decl_jump_unsafe (new_decls
);
2793 identify_goto (decl
, locus
);
2797 error (" crosses initialization of %q+#D", new_decls
);
2799 permerror (input_location
, " enters scope of %q+#D which has "
2800 "non-trivial destructor", new_decls
);
2805 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2809 identify_goto (decl
, locus
);
2812 if (b
->kind
== sk_try
)
2813 error (" enters try block");
2815 error (" enters catch block");
2818 if (b
->kind
== sk_omp
&& !saw_omp
)
2822 identify_goto (decl
, locus
);
2825 error (" enters OpenMP structured block");
2834 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2836 check_previous_goto_1 (decl
, use
->binding_level
,
2837 use
->names_in_scope
, use
->in_omp_scope
,
2838 &use
->o_goto_locus
);
2842 check_switch_goto (cp_binding_level
* level
)
2844 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2847 /* Check that a new jump to a label DECL is OK. Called by
2848 finish_goto_stmt. */
2851 check_goto (tree decl
)
2853 struct named_label_entry
*ent
, dummy
;
2854 bool saw_catch
= false, identified
= false;
2858 /* We can't know where a computed goto is jumping.
2859 So we assume that it's OK. */
2860 if (TREE_CODE (decl
) != LABEL_DECL
)
2863 /* We didn't record any information about this label when we created it,
2864 and there's not much point since it's trivial to analyze as a return. */
2865 if (decl
== cdtor_label
)
2868 dummy
.label_decl
= decl
;
2869 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2870 gcc_assert (ent
!= NULL
);
2872 /* If the label hasn't been defined yet, defer checking. */
2873 if (! DECL_INITIAL (decl
))
2875 struct named_label_use_entry
*new_use
;
2877 /* Don't bother creating another use if the last goto had the
2878 same data, and will therefore create the same set of errors. */
2880 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2883 new_use
= ggc_alloc_named_label_use_entry ();
2884 new_use
->binding_level
= current_binding_level
;
2885 new_use
->names_in_scope
= current_binding_level
->names
;
2886 new_use
->o_goto_locus
= input_location
;
2887 new_use
->in_omp_scope
= false;
2889 new_use
->next
= ent
->uses
;
2890 ent
->uses
= new_use
;
2894 if (ent
->in_try_scope
|| ent
->in_catch_scope
2895 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2897 permerror (input_location
, "jump to label %q+D", decl
);
2898 permerror (input_location
, " from here");
2902 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2904 int u
= decl_jump_unsafe (bad
);
2906 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2908 /* Can't skip init of __exception_info. */
2909 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2913 error (" skips initialization of %q+#D", bad
);
2915 permerror (input_location
, " enters scope of %q+#D which has "
2916 "non-trivial destructor", bad
);
2919 if (ent
->in_try_scope
)
2920 error (" enters try block");
2921 else if (ent
->in_catch_scope
&& !saw_catch
)
2922 error (" enters catch block");
2924 if (ent
->in_omp_scope
)
2925 error (" enters OpenMP structured block");
2926 else if (flag_openmp
)
2928 cp_binding_level
*b
;
2929 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2931 if (b
== ent
->binding_level
)
2933 if (b
->kind
== sk_omp
)
2937 permerror (input_location
, "jump to label %q+D", decl
);
2938 permerror (input_location
, " from here");
2941 error (" exits OpenMP structured block");
2948 /* Check that a return is ok wrt OpenMP structured blocks.
2949 Called by finish_return_stmt. Returns true if all is well. */
2952 check_omp_return (void)
2954 cp_binding_level
*b
;
2955 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2956 if (b
->kind
== sk_omp
)
2958 error ("invalid exit from OpenMP structured block");
2961 else if (b
->kind
== sk_function_parms
)
2966 /* Define a label, specifying the location in the source file.
2967 Return the LABEL_DECL node for the label. */
2970 define_label_1 (location_t location
, tree name
)
2972 struct named_label_entry
*ent
, dummy
;
2973 cp_binding_level
*p
;
2976 decl
= lookup_label (name
);
2978 dummy
.label_decl
= decl
;
2979 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2980 gcc_assert (ent
!= NULL
);
2982 /* After labels, make any new cleanups in the function go into their
2983 own new (temporary) binding contour. */
2984 for (p
= current_binding_level
;
2985 p
->kind
!= sk_function_parms
;
2987 p
->more_cleanups_ok
= 0;
2989 if (name
== get_identifier ("wchar_t"))
2990 permerror (input_location
, "label named wchar_t");
2992 if (DECL_INITIAL (decl
) != NULL_TREE
)
2994 error ("duplicate label %qD", decl
);
2995 return error_mark_node
;
2999 struct named_label_use_entry
*use
;
3001 /* Mark label as having been defined. */
3002 DECL_INITIAL (decl
) = error_mark_node
;
3003 /* Say where in the source. */
3004 DECL_SOURCE_LOCATION (decl
) = location
;
3006 ent
->binding_level
= current_binding_level
;
3007 ent
->names_in_scope
= current_binding_level
->names
;
3009 for (use
= ent
->uses
; use
; use
= use
->next
)
3010 check_previous_goto (decl
, use
);
3017 /* Wrapper for define_label_1. */
3020 define_label (location_t location
, tree name
)
3023 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3024 ret
= define_label_1 (location
, name
);
3025 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3032 cp_binding_level
*level
;
3033 struct cp_switch
*next
;
3034 /* The SWITCH_STMT being built. */
3036 /* A splay-tree mapping the low element of a case range to the high
3037 element, or NULL_TREE if there is no high element. Used to
3038 determine whether or not a new case label duplicates an old case
3039 label. We need a tree, rather than simply a hash table, because
3040 of the GNU case range extension. */
3044 /* A stack of the currently active switch statements. The innermost
3045 switch statement is on the top of the stack. There is no need to
3046 mark the stack for garbage collection because it is only active
3047 during the processing of the body of a function, and we never
3048 collect at that point. */
3050 static struct cp_switch
*switch_stack
;
3052 /* Called right after a switch-statement condition is parsed.
3053 SWITCH_STMT is the switch statement being parsed. */
3056 push_switch (tree switch_stmt
)
3058 struct cp_switch
*p
= XNEW (struct cp_switch
);
3059 p
->level
= current_binding_level
;
3060 p
->next
= switch_stack
;
3061 p
->switch_stmt
= switch_stmt
;
3062 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3069 struct cp_switch
*cs
= switch_stack
;
3070 location_t switch_location
;
3072 /* Emit warnings as needed. */
3073 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3074 if (!processing_template_decl
)
3075 c_do_switch_warnings (cs
->cases
, switch_location
,
3076 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3077 SWITCH_STMT_COND (cs
->switch_stmt
));
3079 splay_tree_delete (cs
->cases
);
3080 switch_stack
= switch_stack
->next
;
3084 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3085 condition. Note that if TYPE and VALUE are already integral we don't
3086 really do the conversion because the language-independent
3087 warning/optimization code will work better that way. */
3090 case_conversion (tree type
, tree value
)
3092 if (value
== NULL_TREE
)
3095 if (cxx_dialect
>= cxx11
3096 && (SCOPED_ENUM_P (type
)
3097 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3099 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3100 type
= type_promotes_to (type
);
3101 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3103 return cxx_constant_value (value
);
3106 /* Note that we've seen a definition of a case label, and complain if this
3107 is a bad place for one. */
3110 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3113 cp_binding_level
*p
;
3116 if (processing_template_decl
)
3120 /* For templates, just add the case label; we'll do semantic
3121 analysis at instantiation-time. */
3122 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3123 return add_stmt (build_case_label (low_value
, high_value
, label
));
3126 /* Find the condition on which this switch statement depends. */
3127 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3128 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3129 cond
= TREE_VALUE (cond
);
3131 if (!check_switch_goto (switch_stack
->level
))
3132 return error_mark_node
;
3134 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3136 low_value
= case_conversion (type
, low_value
);
3137 high_value
= case_conversion (type
, high_value
);
3139 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3140 low_value
, high_value
);
3142 /* After labels, make any new cleanups in the function go into their
3143 own new (temporary) binding contour. */
3144 for (p
= current_binding_level
;
3145 p
->kind
!= sk_function_parms
;
3147 p
->more_cleanups_ok
= 0;
3152 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3155 typename_hash (const void* k
)
3158 const_tree
const t
= (const_tree
) k
;
3160 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3161 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3166 typedef struct typename_info
{
3174 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3175 really of type `typename_info*' */
3178 typename_compare (const void * k1
, const void * k2
)
3180 const_tree
const t1
= (const_tree
) k1
;
3181 const typename_info
*const t2
= (const typename_info
*) k2
;
3183 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3184 && TYPE_CONTEXT (t1
) == t2
->scope
3185 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3186 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3187 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3190 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3191 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3193 Returns the new TYPENAME_TYPE. */
3195 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3198 build_typename_type (tree context
, tree name
, tree fullname
,
3199 enum tag_types tag_type
)
3207 if (typename_htab
== NULL
)
3208 typename_htab
= htab_create_ggc (61, &typename_hash
,
3209 &typename_compare
, NULL
);
3211 ti
.scope
= FROB_CONTEXT (context
);
3213 ti
.template_id
= fullname
;
3214 ti
.enum_p
= tag_type
== enum_type
;
3215 ti
.class_p
= (tag_type
== class_type
3216 || tag_type
== record_type
3217 || tag_type
== union_type
);
3218 hash
= (htab_hash_pointer (ti
.scope
)
3219 ^ htab_hash_pointer (ti
.name
));
3221 /* See if we already have this type. */
3222 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3227 /* Build the TYPENAME_TYPE. */
3228 t
= cxx_make_type (TYPENAME_TYPE
);
3229 TYPE_CONTEXT (t
) = ti
.scope
;
3230 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3231 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3232 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3234 /* Build the corresponding TYPE_DECL. */
3235 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3236 TYPE_NAME (TREE_TYPE (d
)) = d
;
3237 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3238 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3239 DECL_ARTIFICIAL (d
) = 1;
3241 /* Store it in the hash table. */
3244 /* TYPENAME_TYPEs must always be compared structurally, because
3245 they may or may not resolve down to another type depending on
3246 the currently open classes. */
3247 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3253 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3254 provided to name the type. Returns an appropriate type, unless an
3255 error occurs, in which case error_mark_node is returned. If we
3256 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3257 return that, rather than the _TYPE it corresponds to, in other
3258 cases we look through the type decl. If TF_ERROR is set, complain
3259 about errors, otherwise be quiet. */
3262 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3263 tsubst_flags_t complain
)
3269 if (name
== error_mark_node
3270 || context
== NULL_TREE
3271 || context
== error_mark_node
)
3272 return error_mark_node
;
3276 if (!(TYPE_LANG_SPECIFIC (name
)
3277 && (CLASSTYPE_IS_TEMPLATE (name
)
3278 || CLASSTYPE_USE_TEMPLATE (name
))))
3279 name
= TYPE_IDENTIFIER (name
);
3281 /* Create a TEMPLATE_ID_EXPR for the type. */
3282 name
= build_nt (TEMPLATE_ID_EXPR
,
3283 CLASSTYPE_TI_TEMPLATE (name
),
3284 CLASSTYPE_TI_ARGS (name
));
3286 else if (TREE_CODE (name
) == TYPE_DECL
)
3287 name
= DECL_NAME (name
);
3291 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3293 name
= TREE_OPERAND (name
, 0);
3294 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3295 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3296 else if (TREE_CODE (name
) == OVERLOAD
)
3298 if (complain
& tf_error
)
3299 error ("%qD is not a type", name
);
3300 return error_mark_node
;
3303 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3305 if (complain
& tf_error
)
3306 error ("%qD used without template parameters", name
);
3307 return error_mark_node
;
3309 gcc_assert (identifier_p (name
));
3310 gcc_assert (TYPE_P (context
));
3312 if (!MAYBE_CLASS_TYPE_P (context
))
3314 if (complain
& tf_error
)
3315 error ("%q#T is not a class", context
);
3316 return error_mark_node
;
3319 /* When the CONTEXT is a dependent type, NAME could refer to a
3320 dependent base class of CONTEXT. But look inside it anyway
3321 if CONTEXT is a currently open scope, in case it refers to a
3322 member of the current instantiation or a non-dependent base;
3323 lookup will stop when we hit a dependent base. */
3324 if (!dependent_scope_p (context
))
3325 /* We should only set WANT_TYPE when we're a nested typename type.
3326 Then we can give better diagnostics if we find a non-type. */
3327 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3331 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3332 return build_typename_type (context
, name
, fullname
, tag_type
);
3334 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3338 if (complain
& tf_error
)
3339 error (want_template
? G_("no class template named %q#T in %q#T")
3340 : G_("no type named %q#T in %q#T"), name
, context
);
3341 return error_mark_node
;
3344 /* Pull out the template from an injected-class-name (or multiple). */
3346 t
= maybe_get_template_decl_from_type_decl (t
);
3348 if (TREE_CODE (t
) == TREE_LIST
)
3350 if (complain
& tf_error
)
3352 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3353 print_candidates (t
);
3355 return error_mark_node
;
3358 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3360 if (complain
& tf_error
)
3361 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3363 return error_mark_node
;
3365 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3367 if (complain
& tf_error
)
3368 error ("%<typename %T::%D%> names %q#T, which is not a type",
3370 return error_mark_node
;
3373 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3374 return error_mark_node
;
3376 /* If we are currently parsing a template and if T is a typedef accessed
3377 through CONTEXT then we need to remember and check access of T at
3378 template instantiation time. */
3379 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3382 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3384 /*entering_scope=*/0,
3385 tf_warning_or_error
| tf_user
);
3387 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3390 maybe_record_typedef_use (t
);
3395 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3396 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3397 in which case error_mark_node is returned.
3399 If PARM_LIST is non-NULL, also make sure that the template parameter
3400 list of TEMPLATE_DECL matches.
3402 If COMPLAIN zero, don't complain about any errors that occur. */
3405 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3406 tsubst_flags_t complain
)
3412 name
= TYPE_IDENTIFIER (name
);
3413 else if (DECL_P (name
))
3414 name
= DECL_NAME (name
);
3415 gcc_assert (identifier_p (name
));
3417 if (!dependent_type_p (context
)
3418 || currently_open_class (context
))
3420 tree tmpl
= NULL_TREE
;
3422 if (MAYBE_CLASS_TYPE_P (context
))
3423 tmpl
= lookup_field (context
, name
, 0, false);
3425 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3426 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3428 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3430 if (complain
& tf_error
)
3431 error ("no class template named %q#T in %q#T", name
, context
);
3432 return error_mark_node
;
3436 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3438 if (complain
& tf_error
)
3440 error ("template parameters do not match template");
3441 error ("%q+D declared here", tmpl
);
3443 return error_mark_node
;
3446 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3448 return error_mark_node
;
3453 /* Build the UNBOUND_CLASS_TEMPLATE. */
3454 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3455 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3456 TREE_TYPE (t
) = NULL_TREE
;
3457 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3459 /* Build the corresponding TEMPLATE_DECL. */
3460 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3461 TYPE_NAME (TREE_TYPE (d
)) = d
;
3462 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3463 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3464 DECL_ARTIFICIAL (d
) = 1;
3465 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3472 /* Push the declarations of builtin types into the namespace.
3473 RID_INDEX is the index of the builtin type in the array
3474 RID_POINTERS. NAME is the name used when looking up the builtin
3475 type. TYPE is the _TYPE node for the builtin type. */
3478 record_builtin_type (enum rid rid_index
,
3482 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3483 tree tdecl
= NULL_TREE
;
3485 if ((int) rid_index
< (int) RID_MAX
)
3486 rname
= ridpointers
[(int) rid_index
];
3488 tname
= get_identifier (name
);
3490 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3491 eliminated. Built-in types should not be looked up name; their
3492 names are keywords that the parser can recognize. However, there
3493 is code in c-common.c that uses identifier_global_value to look
3494 up built-in types by name. */
3497 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3498 DECL_ARTIFICIAL (tdecl
) = 1;
3499 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3505 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3506 DECL_ARTIFICIAL (tdecl
) = 1;
3508 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3511 if (!TYPE_NAME (type
))
3512 TYPE_NAME (type
) = tdecl
;
3515 debug_hooks
->type_decl (tdecl
, 0);
3518 /* Record one of the standard Java types.
3519 * Declare it as having the given NAME.
3520 * If SIZE > 0, it is the size of one of the integral types;
3521 * otherwise it is the negative of the size of one of the other types. */
3524 record_builtin_java_type (const char* name
, int size
)
3529 type
= build_nonstandard_integer_type (size
, 0);
3530 type
= build_distinct_type_copy (type
);
3532 else if (size
> -32)
3535 /* "__java_char" or ""__java_boolean". */
3536 type
= build_nonstandard_integer_type (-size
, 1);
3537 type
= build_distinct_type_copy (type
);
3538 /* Get the signed type cached and attached to the unsigned type,
3539 so it doesn't get garbage-collected at "random" times,
3540 causing potential codegen differences out of different UIDs
3541 and different alias set numbers. */
3542 stype
= build_nonstandard_integer_type (-size
, 0);
3543 stype
= build_distinct_type_copy (stype
);
3544 TREE_CHAIN (type
) = stype
;
3545 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3548 { /* "__java_float" or ""__java_double". */
3549 type
= make_node (REAL_TYPE
);
3550 TYPE_PRECISION (type
) = - size
;
3553 record_builtin_type (RID_MAX
, name
, type
);
3554 decl
= TYPE_NAME (type
);
3556 /* Suppress generate debug symbol entries for these types,
3557 since for normal C++ they are just clutter.
3558 However, push_lang_context undoes this if extern "Java" is seen. */
3559 DECL_IGNORED_P (decl
) = 1;
3561 TYPE_FOR_JAVA (type
) = 1;
3565 /* Push a type into the namespace so that the back ends ignore it. */
3568 record_unknown_type (tree type
, const char* name
)
3570 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3571 TYPE_DECL
, get_identifier (name
), type
));
3572 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3573 DECL_IGNORED_P (decl
) = 1;
3574 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3575 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3576 TYPE_ALIGN (type
) = 1;
3577 TYPE_USER_ALIGN (type
) = 0;
3578 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3581 /* A string for which we should create an IDENTIFIER_NODE at
3584 typedef struct predefined_identifier
3586 /* The name of the identifier. */
3587 const char *const name
;
3588 /* The place where the IDENTIFIER_NODE should be stored. */
3590 /* Nonzero if this is the name of a constructor or destructor. */
3591 const int ctor_or_dtor_p
;
3592 } predefined_identifier
;
3594 /* Create all the predefined identifiers. */
3597 initialize_predefined_identifiers (void)
3599 const predefined_identifier
*pid
;
3601 /* A table of identifiers to create at startup. */
3602 static const predefined_identifier predefined_identifiers
[] = {
3603 { "C++", &lang_name_cplusplus
, 0 },
3604 { "C", &lang_name_c
, 0 },
3605 { "Java", &lang_name_java
, 0 },
3606 /* Some of these names have a trailing space so that it is
3607 impossible for them to conflict with names written by users. */
3608 { "__ct ", &ctor_identifier
, 1 },
3609 { "__base_ctor ", &base_ctor_identifier
, 1 },
3610 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3611 { "__dt ", &dtor_identifier
, 1 },
3612 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3613 { "__base_dtor ", &base_dtor_identifier
, 1 },
3614 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3615 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3616 { "nelts", &nelts_identifier
, 0 },
3617 { THIS_NAME
, &this_identifier
, 0 },
3618 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3619 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3620 { "_vptr", &vptr_identifier
, 0 },
3621 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3622 { "::", &global_scope_name
, 0 },
3623 { "std", &std_identifier
, 0 },
3627 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3629 *pid
->node
= get_identifier (pid
->name
);
3630 if (pid
->ctor_or_dtor_p
)
3631 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3635 /* Create the predefined scalar types of C,
3636 and some nodes representing standard constants (0, 1, (void *)0).
3637 Initialize the global binding level.
3638 Make definitions for built-in primitive functions. */
3641 cxx_init_decl_processing (void)
3644 tree void_ftype_ptr
;
3646 /* Create all the identifiers we need. */
3647 initialize_predefined_identifiers ();
3649 /* Create the global variables. */
3650 push_to_top_level ();
3652 current_function_decl
= NULL_TREE
;
3653 current_binding_level
= NULL
;
3654 /* Enter the global namespace. */
3655 gcc_assert (global_namespace
== NULL_TREE
);
3656 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3658 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3659 TREE_PUBLIC (global_namespace
) = 1;
3660 begin_scope (sk_namespace
, global_namespace
);
3662 if (flag_visibility_ms_compat
)
3663 default_visibility
= VISIBILITY_HIDDEN
;
3666 current_lang_name
= lang_name_c
;
3668 /* Create the `std' namespace. */
3669 push_namespace (std_identifier
);
3670 std_node
= current_namespace
;
3673 c_common_nodes_and_builtins ();
3675 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3676 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3677 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3678 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3679 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3680 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3681 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3682 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3684 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3686 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3687 truthvalue_type_node
= boolean_type_node
;
3688 truthvalue_false_node
= boolean_false_node
;
3689 truthvalue_true_node
= boolean_true_node
;
3691 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3692 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3693 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3696 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3699 delta_type_node
= ptrdiff_type_node
;
3700 vtable_index_type
= ptrdiff_type_node
;
3702 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3703 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3704 void_ftype_ptr
= build_function_type_list (void_type_node
,
3705 ptr_type_node
, NULL_TREE
);
3707 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3709 /* C++ extensions */
3711 unknown_type_node
= make_node (LANG_TYPE
);
3712 record_unknown_type (unknown_type_node
, "unknown type");
3714 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3715 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3717 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3719 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3720 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3722 init_list_type_node
= make_node (LANG_TYPE
);
3723 record_unknown_type (init_list_type_node
, "init list");
3726 /* Make sure we get a unique function type, so we can give
3727 its pointer type a name. (This wins for gdb.) */
3728 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3729 TREE_TYPE (vfunc_type
) = integer_type_node
;
3730 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3731 layout_type (vfunc_type
);
3733 vtable_entry_type
= build_pointer_type (vfunc_type
);
3735 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3738 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3739 layout_type (vtbl_type_node
);
3740 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3741 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3742 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3743 layout_type (vtbl_ptr_type_node
);
3744 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3746 push_namespace (get_identifier ("__cxxabiv1"));
3747 abi_node
= current_namespace
;
3750 global_type_node
= make_node (LANG_TYPE
);
3751 record_unknown_type (global_type_node
, "global type");
3754 current_lang_name
= lang_name_cplusplus
;
3757 tree newattrs
, extvisattr
;
3758 tree newtype
, deltype
;
3759 tree ptr_ftype_sizetype
;
3763 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3764 if (cxx_dialect
== cxx98
)
3767 tree bad_alloc_type_node
;
3768 tree bad_alloc_decl
;
3770 push_namespace (std_identifier
);
3771 bad_alloc_id
= get_identifier ("bad_alloc");
3772 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3773 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3775 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3776 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3780 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3783 new_eh_spec
= noexcept_false_spec
;
3785 /* Ensure attribs.c is initialized. */
3787 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3789 newattrs
= tree_cons (get_identifier ("alloc_size"),
3790 build_tree_list (NULL_TREE
, integer_one_node
),
3792 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3793 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3794 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3795 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3796 push_cp_library_fn (NEW_EXPR
, newtype
);
3797 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3798 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3799 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3801 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3802 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3803 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3804 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3805 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3806 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3807 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3808 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3812 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3814 /* Perform other language dependent initializations. */
3815 init_class_processing ();
3816 init_rtti_processing ();
3817 init_template_processing ();
3819 if (flag_exceptions
)
3820 init_exception_processing ();
3822 if (! supports_one_only ())
3825 make_fname_decl
= cp_make_fname_decl
;
3826 start_fname_decls ();
3828 /* Show we use EH for cleanups. */
3829 if (flag_exceptions
)
3830 using_eh_for_cleanups ();
3833 /* Generate an initializer for a function naming variable from
3834 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3835 filled in with the type of the init. */
3838 cp_fname_init (const char* name
, tree
*type_p
)
3840 tree domain
= NULL_TREE
;
3842 tree init
= NULL_TREE
;
3847 length
= strlen (name
);
3848 domain
= build_index_type (size_int (length
));
3849 init
= build_string (length
+ 1, name
);
3852 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3853 type
= build_cplus_array_type (type
, domain
);
3858 TREE_TYPE (init
) = type
;
3860 init
= error_mark_node
;
3865 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3866 the decl, LOC is the location to give the decl, NAME is the
3867 initialization string and TYPE_DEP indicates whether NAME depended
3868 on the type of the function. We make use of that to detect
3869 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3870 at the point of first use, so we mustn't push the decl now. */
3873 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3875 const char *const name
= (type_dep
&& processing_template_decl
3876 ? NULL
: fname_as_string (type_dep
));
3878 tree init
= cp_fname_init (name
, &type
);
3879 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3882 free (CONST_CAST (char *, name
));
3884 /* As we're using pushdecl_with_scope, we must set the context. */
3885 DECL_CONTEXT (decl
) = current_function_decl
;
3887 TREE_STATIC (decl
) = 1;
3888 TREE_READONLY (decl
) = 1;
3889 DECL_ARTIFICIAL (decl
) = 1;
3891 TREE_USED (decl
) = 1;
3893 if (current_function_decl
)
3895 cp_binding_level
*b
= current_binding_level
;
3896 if (b
->kind
== sk_function_parms
)
3897 return error_mark_node
;
3898 while (b
->level_chain
->kind
!= sk_function_parms
)
3900 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3901 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3902 LOOKUP_ONLYCONVERTING
);
3906 DECL_THIS_STATIC (decl
) = true;
3907 pushdecl_top_level_and_finish (decl
, init
);
3914 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3916 tree id
= DECL_NAME (decl
);
3917 const char *name
= IDENTIFIER_POINTER (id
);
3919 retrofit_lang_decl (decl
);
3921 DECL_ARTIFICIAL (decl
) = 1;
3922 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3923 SET_DECL_LANGUAGE (decl
, lang_c
);
3924 /* Runtime library routines are, by definition, available in an
3925 external shared object. */
3926 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3927 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3929 DECL_CONTEXT (decl
) = context
;
3932 pushdecl_top_level (decl
);
3936 /* A function in the user's namespace should have an explicit
3937 declaration before it is used. Mark the built-in function as
3938 anticipated but not actually declared. */
3939 if (name
[0] != '_' || name
[1] != '_')
3940 DECL_ANTICIPATED (decl
) = 1;
3941 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3943 size_t len
= strlen (name
);
3945 /* Treat __*_chk fortification functions as anticipated as well,
3946 unless they are __builtin_*. */
3947 if (len
> strlen ("___chk")
3948 && memcmp (name
+ len
- strlen ("_chk"),
3949 "_chk", strlen ("_chk") + 1) == 0)
3950 DECL_ANTICIPATED (decl
) = 1;
3957 cxx_builtin_function (tree decl
)
3959 tree id
= DECL_NAME (decl
);
3960 const char *name
= IDENTIFIER_POINTER (id
);
3961 /* All builtins that don't begin with an '_' should additionally
3962 go in the 'std' namespace. */
3965 tree decl2
= copy_node(decl
);
3966 push_namespace (std_identifier
);
3967 builtin_function_1 (decl2
, std_node
, false);
3971 return builtin_function_1 (decl
, NULL_TREE
, false);
3974 /* Like cxx_builtin_function, but guarantee the function is added to the global
3975 scope. This is to allow function specific options to add new machine
3976 dependent builtins when the target ISA changes via attribute((target(...)))
3977 which saves space on program startup if the program does not use non-generic
3981 cxx_builtin_function_ext_scope (tree decl
)
3984 tree id
= DECL_NAME (decl
);
3985 const char *name
= IDENTIFIER_POINTER (id
);
3986 /* All builtins that don't begin with an '_' should additionally
3987 go in the 'std' namespace. */
3990 tree decl2
= copy_node(decl
);
3991 push_namespace (std_identifier
);
3992 builtin_function_1 (decl2
, std_node
, true);
3996 return builtin_function_1 (decl
, NULL_TREE
, true);
3999 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4000 function. Not called directly. */
4003 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
4005 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4006 DECL_EXTERNAL (fn
) = 1;
4007 TREE_PUBLIC (fn
) = 1;
4008 DECL_ARTIFICIAL (fn
) = 1;
4009 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4010 SET_DECL_LANGUAGE (fn
, lang_c
);
4011 /* Runtime library routines are, by definition, available in an
4012 external shared object. */
4013 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4014 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4018 /* Returns the _DECL for a library function with C linkage.
4019 We assume that such functions never throw; if this is incorrect,
4020 callers should unset TREE_NOTHROW. */
4023 build_library_fn (tree name
, tree type
)
4025 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
4026 TREE_NOTHROW (fn
) = 1;
4030 /* Returns the _DECL for a library function with C++ linkage. */
4033 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
4035 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
4036 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
4037 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4038 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4042 /* Like build_library_fn, but takes a C string instead of an
4046 build_library_fn_ptr (const char* name
, tree type
)
4048 return build_library_fn (get_identifier (name
), type
);
4051 /* Like build_cp_library_fn, but takes a C string instead of an
4055 build_cp_library_fn_ptr (const char* name
, tree type
)
4057 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
4060 /* Like build_library_fn, but also pushes the function so that we will
4061 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4062 may throw exceptions listed in RAISES. */
4065 push_library_fn (tree name
, tree type
, tree raises
)
4070 type
= build_exception_variant (type
, raises
);
4072 fn
= build_library_fn (name
, type
);
4073 pushdecl_top_level (fn
);
4077 /* Like build_cp_library_fn, but also pushes the function so that it
4078 will be found by normal lookup. */
4081 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4083 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4088 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4092 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4096 push_void_library_fn (tree name
, tree parmtypes
)
4098 tree type
= build_function_type (void_type_node
, parmtypes
);
4099 return push_library_fn (name
, type
, NULL_TREE
);
4102 /* Like push_library_fn, but also note that this function throws
4103 and does not return. Used for __throw_foo and the like. */
4106 push_throw_library_fn (tree name
, tree type
)
4108 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4109 TREE_THIS_VOLATILE (fn
) = 1;
4110 TREE_NOTHROW (fn
) = 0;
4114 /* When we call finish_struct for an anonymous union, we create
4115 default copy constructors and such. But, an anonymous union
4116 shouldn't have such things; this function undoes the damage to the
4117 anonymous union type T.
4119 (The reason that we create the synthesized methods is that we don't
4120 distinguish `union { int i; }' from `typedef union { int i; } U'.
4121 The first is an anonymous union; the second is just an ordinary
4125 fixup_anonymous_aggr (tree t
)
4129 /* Wipe out memory of synthesized methods. */
4130 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4131 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4132 TYPE_HAS_COPY_CTOR (t
) = 0;
4133 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4134 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4135 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4137 /* Splice the implicitly generated functions out of the TYPE_METHODS
4139 q
= &TYPE_METHODS (t
);
4142 if (DECL_ARTIFICIAL (*q
))
4143 *q
= TREE_CHAIN (*q
);
4145 q
= &DECL_CHAIN (*q
);
4148 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4149 if (TYPE_METHODS (t
))
4151 tree decl
= TYPE_MAIN_DECL (t
);
4153 if (TREE_CODE (t
) != UNION_TYPE
)
4154 error_at (DECL_SOURCE_LOCATION (decl
),
4155 "an anonymous struct cannot have function members");
4157 error_at (DECL_SOURCE_LOCATION (decl
),
4158 "an anonymous union cannot have function members");
4161 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4162 assignment operators (because they cannot have these methods themselves).
4163 For anonymous unions this is already checked because they are not allowed
4164 in any union, otherwise we have to check it. */
4165 if (TREE_CODE (t
) != UNION_TYPE
)
4169 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4170 if (TREE_CODE (field
) == FIELD_DECL
)
4172 type
= TREE_TYPE (field
);
4173 if (CLASS_TYPE_P (type
))
4175 if (TYPE_NEEDS_CONSTRUCTING (type
))
4176 error ("member %q+#D with constructor not allowed "
4177 "in anonymous aggregate", field
);
4178 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4179 error ("member %q+#D with destructor not allowed "
4180 "in anonymous aggregate", field
);
4181 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4182 error ("member %q+#D with copy assignment operator "
4183 "not allowed in anonymous aggregate", field
);
4189 /* Warn for an attribute located at LOCATION that appertains to the
4190 class type CLASS_TYPE that has not been properly placed after its
4191 class-key, in it class-specifier. */
4194 warn_misplaced_attr_for_class_type (source_location location
,
4197 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4199 warning_at (location
, OPT_Wattributes
,
4200 "attribute ignored in declaration "
4201 "of %q#T", class_type
);
4203 "attribute for %q#T must follow the %qs keyword",
4204 class_type
, class_key_or_enum_as_string (class_type
));
4207 /* Make sure that a declaration with no declarator is well-formed, i.e.
4208 just declares a tagged type or anonymous union.
4210 Returns the type declared; or NULL_TREE if none. */
4213 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4214 bool explicit_type_instantiation_p
)
4216 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4217 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4218 /* If a class, struct, or enum type is declared by the DECLSPECS
4219 (i.e, if a class-specifier, enum-specifier, or non-typename
4220 elaborated-type-specifier appears in the DECLSPECS),
4221 DECLARED_TYPE is set to the corresponding type. */
4222 tree declared_type
= NULL_TREE
;
4223 bool error_p
= false;
4225 if (declspecs
->multiple_types_p
)
4226 error ("multiple types in one declaration");
4227 else if (declspecs
->redefined_builtin_type
)
4229 if (!in_system_header
)
4230 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4231 "redeclaration of C++ built-in type %qT",
4232 declspecs
->redefined_builtin_type
);
4237 && TYPE_P (declspecs
->type
)
4238 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4239 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4240 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4241 declared_type
= declspecs
->type
;
4242 else if (declspecs
->type
== error_mark_node
)
4244 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4245 permerror (input_location
, "declaration does not declare anything");
4246 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4248 error ("%<auto%> can only be specified for variables "
4249 "or function declarations");
4250 return error_mark_node
;
4252 /* Check for an anonymous union. */
4253 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4254 && TYPE_ANONYMOUS_P (declared_type
))
4256 /* 7/3 In a simple-declaration, the optional init-declarator-list
4257 can be omitted only when declaring a class (clause 9) or
4258 enumeration (7.2), that is, when the decl-specifier-seq contains
4259 either a class-specifier, an elaborated-type-specifier with
4260 a class-key (9.1), or an enum-specifier. In these cases and
4261 whenever a class-specifier or enum-specifier is present in the
4262 decl-specifier-seq, the identifiers in these specifiers are among
4263 the names being declared by the declaration (as class-name,
4264 enum-names, or enumerators, depending on the syntax). In such
4265 cases, and except for the declaration of an unnamed bit-field (9.6),
4266 the decl-specifier-seq shall introduce one or more names into the
4267 program, or shall redeclare a name introduced by a previous
4268 declaration. [Example:
4269 enum { }; // ill-formed
4270 typedef class { }; // ill-formed
4274 error ("missing type-name in typedef-declaration");
4277 /* Anonymous unions are objects, so they can have specifiers. */;
4278 SET_ANON_AGGR_TYPE_P (declared_type
);
4280 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4281 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4286 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4287 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4288 error ("%qs can only be specified for functions",
4289 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4290 ? "inline" : "virtual");
4292 && (!current_class_type
4293 || current_scope () != current_class_type
))
4294 error ("%<friend%> can only be specified inside a class");
4295 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4296 error ("%<explicit%> can only be specified for constructors");
4297 else if (declspecs
->storage_class
)
4298 error ("a storage class can only be specified for objects "
4300 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4301 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4302 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4303 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4304 error ("qualifiers can only be specified for objects "
4306 else if (saw_typedef
)
4307 warning (0, "%<typedef%> was ignored in this declaration");
4308 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4309 error ("%<constexpr%> cannot be used for type declarations");
4312 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4315 if (!CLASS_TYPE_P (declared_type
)
4316 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4317 /* For a non-template class, use the name location. */
4318 loc
= location_of (declared_type
);
4320 /* For a template class (an explicit instantiation), use the
4321 current location. */
4322 loc
= input_location
;
4324 if (explicit_type_instantiation_p
)
4325 /* [dcl.attr.grammar]/4:
4327 No attribute-specifier-seq shall appertain to an explicit
4330 warning_at (loc
, OPT_Wattributes
,
4331 "attribute ignored in explicit instantiation %q#T",
4334 "no attribute can be applied to "
4335 "an explicit instantiation");
4338 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4341 return declared_type
;
4344 /* Called when a declaration is seen that contains no names to declare.
4345 If its type is a reference to a structure, union or enum inherited
4346 from a containing scope, shadow that tag name for the current scope
4347 with a forward reference.
4348 If its type defines a new named structure or union
4349 or defines an enum, it is valid but we need not do anything here.
4350 Otherwise, it is an error.
4352 C++: may have to grok the declspecs to learn about static,
4353 complain for anonymous unions.
4355 Returns the TYPE declared -- or NULL_TREE if none. */
4358 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4360 tree t
= check_tag_decl (declspecs
,
4361 /*explicit_type_instantiation_p=*/false);
4366 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4369 /* This is where the variables in an anonymous union are
4370 declared. An anonymous union declaration looks like:
4372 because there is no declarator after the union, the parser
4373 sends that declaration here. */
4374 if (ANON_AGGR_TYPE_P (t
))
4376 fixup_anonymous_aggr (t
);
4378 if (TYPE_FIELDS (t
))
4380 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4381 declspecs
, NORMAL
, 0, NULL
);
4382 finish_anon_union (decl
);
4389 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4392 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4393 const cp_declarator
*declarator
,
4394 bool is_template_arg
)
4398 enum decl_context context
4399 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4400 attrs
= type_specifiers
->attributes
;
4401 type_specifiers
->attributes
= NULL_TREE
;
4402 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4403 if (attrs
&& type
!= error_mark_node
)
4405 if (CLASS_TYPE_P (type
))
4406 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4407 "outside of definition", type
);
4408 else if (MAYBE_CLASS_TYPE_P (type
))
4409 /* A template type parameter or other dependent type. */
4410 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4411 "type %qT without an associated declaration", type
);
4413 cplus_decl_attributes (&type
, attrs
, 0);
4418 /* Process a DECLARATOR for a function-scope variable declaration,
4419 namespace-scope variable declaration, or function declaration.
4420 (Function definitions go through start_function; class member
4421 declarations appearing in the body of the class go through
4422 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4423 If an error occurs, the error_mark_node is returned instead.
4425 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4426 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4427 for an explicitly defaulted function, or SD_DELETED for an explicitly
4428 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4429 implicitly initialized via a default constructor. ATTRIBUTES and
4430 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4432 The scope represented by the context of the returned DECL is pushed
4433 (if it is not the global namespace) and is assigned to
4434 *PUSHED_SCOPE_P. The caller is then responsible for calling
4435 pop_scope on *PUSHED_SCOPE_P if it is set. */
4438 start_decl (const cp_declarator
*declarator
,
4439 cp_decl_specifier_seq
*declspecs
,
4442 tree prefix_attributes
,
4443 tree
*pushed_scope_p
)
4451 *pushed_scope_p
= NULL_TREE
;
4453 /* An object declared as __attribute__((deprecated)) suppresses
4454 warnings of uses of other deprecated items. */
4455 if (lookup_attribute ("deprecated", attributes
))
4456 deprecated_state
= DEPRECATED_SUPPRESS
;
4458 attributes
= chainon (attributes
, prefix_attributes
);
4460 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4463 deprecated_state
= DEPRECATED_NORMAL
;
4465 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4466 || decl
== error_mark_node
)
4467 return error_mark_node
;
4469 context
= CP_DECL_CONTEXT (decl
);
4470 if (context
!= global_namespace
)
4471 *pushed_scope_p
= push_scope (context
);
4474 /* Is it valid for this decl to have an initializer at all?
4475 If not, set INITIALIZED to zero, which will indirectly
4476 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4477 switch (TREE_CODE (decl
))
4480 error ("typedef %qD is initialized (use decltype instead)", decl
);
4481 return error_mark_node
;
4484 if (initialized
== SD_DELETED
)
4485 /* We'll handle the rest of the semantics later, but we need to
4486 set this now so it's visible to duplicate_decls. */
4487 DECL_DELETED_FN (decl
) = 1;
4496 if (! toplevel_bindings_p ()
4497 && DECL_EXTERNAL (decl
))
4498 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4500 DECL_EXTERNAL (decl
) = 0;
4501 if (toplevel_bindings_p ())
4502 TREE_STATIC (decl
) = 1;
4504 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4506 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4507 record_key_method_defined (decl
);
4509 /* If this is a typedef that names the class for linkage purposes
4510 (7.1.3p8), apply any attributes directly to the type. */
4511 if (TREE_CODE (decl
) == TYPE_DECL
4512 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4513 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4514 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4518 /* Set attributes here so if duplicate decl, will have proper attributes. */
4519 cplus_decl_attributes (&decl
, attributes
, flags
);
4521 /* Dllimported symbols cannot be defined. Static data members (which
4522 can be initialized in-class and dllimported) go through grokfield,
4523 not here, so we don't need to exclude those decls when checking for
4525 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4527 error ("definition of %q#D is marked %<dllimport%>", decl
);
4528 DECL_DLLIMPORT_P (decl
) = 0;
4531 /* If #pragma weak was used, mark the decl weak now. */
4532 if (!processing_template_decl
)
4533 maybe_apply_pragma_weak (decl
);
4535 if (TREE_CODE (decl
) == FUNCTION_DECL
4536 && DECL_DECLARED_INLINE_P (decl
)
4537 && DECL_UNINLINABLE (decl
)
4538 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4539 warning (0, "inline function %q+D given attribute noinline", decl
);
4541 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4545 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4546 if (field
== NULL_TREE
|| !VAR_P (field
))
4547 error ("%q#D is not a static member of %q#T", decl
, context
);
4550 if (DECL_CONTEXT (field
) != context
)
4552 if (!same_type_p (DECL_CONTEXT (field
), context
))
4553 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4554 "to be defined as %<%T::%D%>",
4555 DECL_CONTEXT (field
), DECL_NAME (decl
),
4556 context
, DECL_NAME (decl
));
4557 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4559 /* Static data member are tricky; an in-class initialization
4560 still doesn't provide a definition, so the in-class
4561 declaration will have DECL_EXTERNAL set, but will have an
4562 initialization. Thus, duplicate_decls won't warn
4563 about this situation, and so we check here. */
4564 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4565 error ("duplicate initialization of %qD", decl
);
4566 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4568 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4569 && !DECL_DECLARED_CONSTEXPR_P (field
))
4570 error ("%qD declared %<constexpr%> outside its class", field
);
4575 tree field
= check_classfn (context
, decl
,
4576 (processing_template_decl
4577 > template_class_depth (context
))
4578 ? current_template_parms
4580 if (field
&& field
!= error_mark_node
4581 && duplicate_decls (decl
, field
,
4582 /*newdecl_is_friend=*/false))
4586 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4587 DECL_IN_AGGR_P (decl
) = 0;
4588 /* Do not mark DECL as an explicit specialization if it was not
4589 already marked as an instantiation; a declaration should
4590 never be marked as a specialization unless we know what
4591 template is being specialized. */
4592 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4594 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4596 /* [temp.expl.spec] An explicit specialization of a static data
4597 member of a template is a definition if the declaration
4598 includes an initializer; otherwise, it is a declaration.
4600 We check for processing_specialization so this only applies
4601 to the new specialization syntax. */
4602 if (!initialized
&& processing_specialization
)
4603 DECL_EXTERNAL (decl
) = 1;
4606 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4607 /* Aliases are definitions. */
4609 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4613 was_public
= TREE_PUBLIC (decl
);
4615 /* Enter this declaration into the symbol table. */
4616 decl
= maybe_push_decl (decl
);
4618 if (processing_template_decl
)
4619 decl
= push_template_decl (decl
);
4620 if (decl
== error_mark_node
)
4621 return error_mark_node
;
4624 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4625 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4627 /* This is a const variable with implicit 'static'. Set
4628 DECL_THIS_STATIC so we can tell it from variables that are
4629 !TREE_PUBLIC because of the anonymous namespace. */
4630 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4631 DECL_THIS_STATIC (decl
) = 1;
4634 if (!processing_template_decl
&& VAR_P (decl
))
4635 start_decl_1 (decl
, initialized
);
4640 /* Process the declaration of a variable DECL. INITIALIZED is true
4641 iff DECL is explicitly initialized. (INITIALIZED is false if the
4642 variable is initialized via an implicitly-called constructor.)
4643 This function must be called for ordinary variables (including, for
4644 example, implicit instantiations of templates), but must not be
4645 called for template declarations. */
4648 start_decl_1 (tree decl
, bool initialized
)
4652 bool aggregate_definition_p
;
4654 gcc_assert (!processing_template_decl
);
4656 if (error_operand_p (decl
))
4659 gcc_assert (VAR_P (decl
));
4661 type
= TREE_TYPE (decl
);
4662 complete_p
= COMPLETE_TYPE_P (type
);
4663 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4665 /* If an explicit initializer is present, or if this is a definition
4666 of an aggregate, then we need a complete type at this point.
4667 (Scalars are always complete types, so there is nothing to
4668 check.) This code just sets COMPLETE_P; errors (if necessary)
4669 are issued below. */
4670 if ((initialized
|| aggregate_definition_p
)
4672 && COMPLETE_TYPE_P (complete_type (type
)))
4675 /* We will not yet have set TREE_READONLY on DECL if the type
4676 was "const", but incomplete, before this point. But, now, we
4677 have a complete type, so we can try again. */
4678 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4682 /* Is it valid for this decl to have an initializer at all? */
4684 /* Don't allow initializations for incomplete types except for
4685 arrays which might be completed by the initialization. */
4687 ; /* A complete type is ok. */
4688 else if (type_uses_auto (type
))
4689 ; /* An auto type is ok. */
4690 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4692 error ("variable %q#D has initializer but incomplete type", decl
);
4693 type
= TREE_TYPE (decl
) = error_mark_node
;
4695 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4697 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4698 error ("elements of array %q#D have incomplete type", decl
);
4699 /* else we already gave an error in start_decl. */
4702 else if (aggregate_definition_p
&& !complete_p
)
4704 if (type_uses_auto (type
))
4705 error ("declaration of %q#D has no initializer", decl
);
4707 error ("aggregate %q#D has incomplete type and cannot be defined",
4709 /* Change the type so that assemble_variable will give
4710 DECL an rtl we can live with: (mem (const_int 0)). */
4711 type
= TREE_TYPE (decl
) = error_mark_node
;
4714 /* Create a new scope to hold this declaration if necessary.
4715 Whether or not a new scope is necessary cannot be determined
4716 until after the type has been completed; if the type is a
4717 specialization of a class template it is not until after
4718 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4719 will be set correctly. */
4720 maybe_push_cleanup_level (type
);
4723 /* Handle initialization of references. DECL, TYPE, and INIT have the
4724 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4725 but will be set to a new CLEANUP_STMT if a temporary is created
4726 that must be destroyed subsequently.
4728 Returns an initializer expression to use to initialize DECL, or
4729 NULL if the initialization can be performed statically.
4731 Quotes on semantics can be found in ARM 8.4.3. */
4734 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4736 if (init
== NULL_TREE
)
4738 if ((DECL_LANG_SPECIFIC (decl
) == 0
4739 || DECL_IN_AGGR_P (decl
) == 0)
4740 && ! DECL_THIS_EXTERN (decl
))
4741 error ("%qD declared as reference but not initialized", decl
);
4745 if (TREE_CODE (init
) == TREE_LIST
)
4746 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4747 tf_warning_or_error
);
4749 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4750 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4751 /* Note: default conversion is only called in very special cases. */
4752 init
= decay_conversion (init
, tf_warning_or_error
);
4754 /* Convert INIT to the reference type TYPE. This may involve the
4755 creation of a temporary, whose lifetime must be the same as that
4756 of the reference. If so, a DECL_EXPR for the temporary will be
4757 added just after the DECL_EXPR for DECL. That's why we don't set
4758 DECL_INITIAL for local references (instead assigning to them
4759 explicitly); we need to allow the temporary to be initialized
4761 return initialize_reference (type
, init
, flags
,
4762 tf_warning_or_error
);
4765 /* Designated initializers in arrays are not supported in GNU C++.
4766 The parser cannot detect this error since it does not know whether
4767 a given brace-enclosed initializer is for a class type or for an
4768 array. This function checks that CE does not use a designated
4769 initializer. If it does, an error is issued. Returns true if CE
4770 is valid, i.e., does not have a designated initializer. */
4773 check_array_designated_initializer (constructor_elt
*ce
,
4774 unsigned HOST_WIDE_INT index
)
4776 /* Designated initializers for array elements are not supported. */
4779 /* The parser only allows identifiers as designated
4781 if (ce
->index
== error_mark_node
)
4783 error ("name used in a GNU-style designated "
4784 "initializer for an array");
4787 else if (identifier_p (ce
->index
))
4789 error ("name %qD used in a GNU-style designated "
4790 "initializer for an array", ce
->index
);
4794 ce
->index
= cxx_constant_value (ce
->index
);
4796 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4798 /* A C99 designator is OK if it matches the current index. */
4799 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4802 sorry ("non-trivial designated initializers not supported");
4813 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4814 array until we finish parsing the initializer. If that's the
4815 situation we're in, update DECL accordingly. */
4818 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4820 tree type
= TREE_TYPE (decl
);
4822 if (TREE_CODE (type
) == ARRAY_TYPE
4823 && TYPE_DOMAIN (type
) == NULL_TREE
4824 && TREE_CODE (decl
) != TYPE_DECL
)
4826 /* do_default is really a C-ism to deal with tentative definitions.
4827 But let's leave it here to ease the eventual merge. */
4828 int do_default
= !DECL_EXTERNAL (decl
);
4829 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4832 /* Check that there are no designated initializers in INIT, as
4833 those are not supported in GNU C++, and as the middle-end
4834 will crash if presented with a non-numeric designated
4836 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4838 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4839 constructor_elt
*ce
;
4841 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4842 if (!check_array_designated_initializer (ce
, i
))
4848 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4852 error ("initializer fails to determine size of %qD", decl
);
4854 else if (failure
== 2)
4858 error ("array size missing in %qD", decl
);
4860 /* If a `static' var's size isn't known, make it extern as
4861 well as static, so it does not get allocated. If it's not
4862 `static', then don't mark it extern; finish_incomplete_decl
4863 will give it a default size and it will get allocated. */
4864 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4865 DECL_EXTERNAL (decl
) = 1;
4867 else if (failure
== 3)
4869 error ("zero-size array %qD", decl
);
4873 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4875 relayout_decl (decl
);
4879 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4880 any appropriate error messages regarding the layout. */
4883 layout_var_decl (tree decl
)
4887 type
= TREE_TYPE (decl
);
4888 if (type
== error_mark_node
)
4891 /* If we haven't already laid out this declaration, do so now.
4892 Note that we must not call complete type for an external object
4893 because it's type might involve templates that we are not
4894 supposed to instantiate yet. (And it's perfectly valid to say
4895 `extern X x' for some incomplete type `X'.) */
4896 if (!DECL_EXTERNAL (decl
))
4897 complete_type (type
);
4898 if (!DECL_SIZE (decl
)
4899 && TREE_TYPE (decl
) != error_mark_node
4900 && (COMPLETE_TYPE_P (type
)
4901 || (TREE_CODE (type
) == ARRAY_TYPE
4902 && !TYPE_DOMAIN (type
)
4903 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4904 layout_decl (decl
, 0);
4906 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4908 /* An automatic variable with an incomplete type: that is an error.
4909 Don't talk about array types here, since we took care of that
4910 message in grokdeclarator. */
4911 error ("storage size of %qD isn%'t known", decl
);
4912 TREE_TYPE (decl
) = error_mark_node
;
4915 /* Keep this code around in case we later want to control debug info
4916 based on whether a type is "used". (jason 1999-11-11) */
4918 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4919 /* Let debugger know it should output info for this type. */
4920 note_debug_info_needed (ttype
);
4922 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4923 note_debug_info_needed (DECL_CONTEXT (decl
));
4926 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4927 && DECL_SIZE (decl
) != NULL_TREE
4928 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4930 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4931 constant_expression_warning (DECL_SIZE (decl
));
4934 error ("storage size of %qD isn%'t constant", decl
);
4935 TREE_TYPE (decl
) = error_mark_node
;
4940 /* If a local static variable is declared in an inline function, or if
4941 we have a weak definition, we must endeavor to create only one
4942 instance of the variable at link-time. */
4945 maybe_commonize_var (tree decl
)
4947 /* Static data in a function with comdat linkage also has comdat
4949 if (TREE_STATIC (decl
)
4950 /* Don't mess with __FUNCTION__. */
4951 && ! DECL_ARTIFICIAL (decl
)
4952 && DECL_FUNCTION_SCOPE_P (decl
)
4953 && vague_linkage_p (DECL_CONTEXT (decl
)))
4957 /* With weak symbols, we simply make the variable COMDAT;
4958 that will cause copies in multiple translations units to
4960 comdat_linkage (decl
);
4964 if (DECL_INITIAL (decl
) == NULL_TREE
4965 || DECL_INITIAL (decl
) == error_mark_node
)
4967 /* Without weak symbols, we can use COMMON to merge
4968 uninitialized variables. */
4969 TREE_PUBLIC (decl
) = 1;
4970 DECL_COMMON (decl
) = 1;
4974 /* While for initialized variables, we must use internal
4975 linkage -- which means that multiple copies will not
4977 TREE_PUBLIC (decl
) = 0;
4978 DECL_COMMON (decl
) = 0;
4979 warning_at (input_location
, 0,
4980 "sorry: semantics of inline function static "
4981 "data %q+#D are wrong (you%'ll wind up "
4982 "with multiple copies)", decl
);
4983 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4984 " you can work around this by removing "
4989 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4990 /* Set it up again; we might have set DECL_INITIAL since the last
4992 comdat_linkage (decl
);
4995 /* Issue an error message if DECL is an uninitialized const variable. */
4998 check_for_uninitialized_const_var (tree decl
)
5000 tree type
= strip_array_types (TREE_TYPE (decl
));
5002 /* ``Unless explicitly declared extern, a const object does not have
5003 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5006 && TREE_CODE (type
) != REFERENCE_TYPE
5007 && CP_TYPE_CONST_P (type
)
5008 && !DECL_INITIAL (decl
))
5010 tree field
= default_init_uninitialized_part (type
);
5014 permerror (DECL_SOURCE_LOCATION (decl
),
5015 "uninitialized const %qD", decl
);
5017 if (CLASS_TYPE_P (type
))
5019 tree defaulted_ctor
;
5021 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5022 "%q#T has no user-provided default constructor", type
);
5023 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5025 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5026 "constructor is not user-provided because it is "
5027 "explicitly defaulted in the class body");
5028 inform (0, "and the implicitly-defined constructor does not "
5029 "initialize %q+#D", field
);
5034 /* Structure holding the current initializer being processed by reshape_init.
5035 CUR is a pointer to the current element being processed, END is a pointer
5036 after the last element present in the initializer. */
5037 typedef struct reshape_iterator_t
5039 constructor_elt
*cur
;
5040 constructor_elt
*end
;
5043 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5045 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5046 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5047 initialized. If there are no more such fields, the return value
5051 next_initializable_field (tree field
)
5054 && (TREE_CODE (field
) != FIELD_DECL
5055 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5056 || DECL_ARTIFICIAL (field
)))
5057 field
= DECL_CHAIN (field
);
5062 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5063 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5064 INTEGER_CST representing the size of the array minus one (the maximum index),
5065 or NULL_TREE if the array was declared without specifying the size. D is
5066 the iterator within the constructor. */
5069 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5070 tsubst_flags_t complain
)
5073 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5074 unsigned HOST_WIDE_INT max_index_cst
= 0;
5075 unsigned HOST_WIDE_INT index
;
5077 /* The initializer for an array is always a CONSTRUCTOR. */
5078 new_init
= build_constructor (init_list_type_node
, NULL
);
5082 /* Minus 1 is used for zero sized arrays. */
5083 if (integer_all_onesp (max_index
))
5086 if (host_integerp (max_index
, 1))
5087 max_index_cst
= tree_low_cst (max_index
, 1);
5088 /* sizetype is sign extended, not zero extended. */
5090 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5094 /* Loop until there are no more initializers. */
5096 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5100 constructor_elt
*old_cur
= d
->cur
;
5102 check_array_designated_initializer (d
->cur
, index
);
5103 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5105 if (elt_init
== error_mark_node
)
5106 return error_mark_node
;
5107 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5108 size_int (index
), elt_init
);
5109 if (!TREE_CONSTANT (elt_init
))
5110 TREE_CONSTANT (new_init
) = false;
5112 /* This can happen with an invalid initializer (c++/54501). */
5113 if (d
->cur
== old_cur
&& !sized_array_p
)
5120 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5121 Parameters are the same of reshape_init_r. */
5124 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5126 tree max_index
= NULL_TREE
;
5128 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5130 if (TYPE_DOMAIN (type
))
5131 max_index
= array_type_nelts (type
);
5133 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5136 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5137 Parameters are the same of reshape_init_r. */
5140 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5142 tree max_index
= NULL_TREE
;
5144 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5146 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5148 tree value
= d
->cur
->value
;
5149 if (!same_type_p (TREE_TYPE (value
), type
))
5151 if (complain
& tf_error
)
5152 error ("invalid type %qT as initializer for a vector of type %qT",
5153 TREE_TYPE (d
->cur
->value
), type
);
5154 value
= error_mark_node
;
5160 /* For a vector, we initialize it as an array of the appropriate size. */
5161 if (TREE_CODE (type
) == VECTOR_TYPE
)
5162 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5164 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5167 /* Subroutine of reshape_init_r, processes the initializers for classes
5168 or union. Parameters are the same of reshape_init_r. */
5171 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5172 tsubst_flags_t complain
)
5177 gcc_assert (CLASS_TYPE_P (type
));
5179 /* The initializer for a class is always a CONSTRUCTOR. */
5180 new_init
= build_constructor (init_list_type_node
, NULL
);
5181 field
= next_initializable_field (TYPE_FIELDS (type
));
5187 An initializer for an aggregate member that is an
5188 empty class shall have the form of an empty
5189 initializer-list {}. */
5190 if (!first_initializer_p
)
5192 if (complain
& tf_error
)
5193 error ("initializer for %qT must be brace-enclosed", type
);
5194 return error_mark_node
;
5199 /* Loop through the initializable fields, gathering initializers. */
5200 while (d
->cur
!= d
->end
)
5203 constructor_elt
*old_cur
= d
->cur
;
5205 /* Handle designated initializers, as an extension. */
5208 if (d
->cur
->index
== error_mark_node
)
5209 return error_mark_node
;
5211 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5213 if (complain
& tf_error
)
5214 error ("%<[%E] =%> used in a GNU-style designated initializer"
5215 " for class %qT", d
->cur
->index
, type
);
5216 return error_mark_node
;
5219 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5220 /* We already reshaped this. */
5221 gcc_assert (d
->cur
->index
== field
);
5223 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5225 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5227 if (complain
& tf_error
)
5228 error ("%qT has no non-static data member named %qD", type
,
5230 return error_mark_node
;
5234 /* If we processed all the member of the class, we are done. */
5238 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5239 /*first_initializer_p=*/false, complain
);
5240 if (field_init
== error_mark_node
)
5241 return error_mark_node
;
5243 if (d
->cur
== old_cur
&& d
->cur
->index
)
5245 /* This can happen with an invalid initializer for a flexible
5246 array member (c++/54441). */
5247 if (complain
& tf_error
)
5248 error ("invalid initializer for %q#D", field
);
5249 return error_mark_node
;
5252 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5256 When a union is initialized with a brace-enclosed
5257 initializer, the braces shall only contain an
5258 initializer for the first member of the union. */
5259 if (TREE_CODE (type
) == UNION_TYPE
)
5262 field
= next_initializable_field (DECL_CHAIN (field
));
5268 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5269 designators are not valid; either complain or return true to indicate
5270 that reshape_init_r should return error_mark_node. */
5273 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5277 if (complain
& tf_error
)
5278 error ("C99 designator %qE outside aggregate initializer",
5286 /* Subroutine of reshape_init, which processes a single initializer (part of
5287 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5288 iterator within the CONSTRUCTOR which points to the initializer to process.
5289 FIRST_INITIALIZER_P is true if this is the first initializer of the
5290 outermost CONSTRUCTOR node. */
5293 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5294 tsubst_flags_t complain
)
5296 tree init
= d
->cur
->value
;
5298 if (error_operand_p (init
))
5299 return error_mark_node
;
5301 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5302 && has_designator_problem (d
, complain
))
5303 return error_mark_node
;
5305 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5307 /* A complex type can be initialized from one or two initializers,
5308 but braces are not elided. */
5310 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5312 if (CONSTRUCTOR_NELTS (init
) > 2)
5314 if (complain
& tf_error
)
5315 error ("too many initializers for %qT", type
);
5317 return error_mark_node
;
5320 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5322 vec
<constructor_elt
, va_gc
> *v
= 0;
5323 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5324 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5325 if (has_designator_problem (d
, complain
))
5326 return error_mark_node
;
5328 init
= build_constructor (init_list_type_node
, v
);
5333 /* A non-aggregate type is always initialized with a single
5335 if (!CP_AGGREGATE_TYPE_P (type
))
5337 /* It is invalid to initialize a non-aggregate type with a
5338 brace-enclosed initializer before C++0x.
5339 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5340 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5341 a CONSTRUCTOR (with a record type). */
5342 if (TREE_CODE (init
) == CONSTRUCTOR
5343 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5345 if (SCALAR_TYPE_P (type
))
5347 if (complain
& tf_error
)
5348 error ("braces around scalar initializer for type %qT", type
);
5349 init
= error_mark_node
;
5352 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5361 All implicit type conversions (clause _conv_) are considered when
5362 initializing the aggregate member with an initializer from an
5363 initializer-list. If the initializer can initialize a member,
5364 the member is initialized. Otherwise, if the member is itself a
5365 non-empty subaggregate, brace elision is assumed and the
5366 initializer is considered for the initialization of the first
5367 member of the subaggregate. */
5368 if (TREE_CODE (init
) != CONSTRUCTOR
5369 /* But don't try this for the first initializer, since that would be
5370 looking through the outermost braces; A a2 = { a1 }; is not a
5371 valid aggregate initialization. */
5372 && !first_initializer_p
5373 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5374 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5381 /* [dcl.init.string]
5383 A char array (whether plain char, signed char, or unsigned char)
5384 can be initialized by a string-literal (optionally enclosed in
5385 braces); a wchar_t array can be initialized by a wide
5386 string-literal (optionally enclosed in braces). */
5387 if (TREE_CODE (type
) == ARRAY_TYPE
5388 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5390 tree str_init
= init
;
5392 /* Strip one level of braces if and only if they enclose a single
5393 element (as allowed by [dcl.init.string]). */
5394 if (!first_initializer_p
5395 && TREE_CODE (str_init
) == CONSTRUCTOR
5396 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5398 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5401 /* If it's a string literal, then it's the initializer for the array
5402 as a whole. Otherwise, continue with normal initialization for
5403 array types (one value per array element). */
5404 if (TREE_CODE (str_init
) == STRING_CST
)
5406 if (has_designator_problem (d
, complain
))
5407 return error_mark_node
;
5413 /* The following cases are about aggregates. If we are not within a full
5414 initializer already, and there is not a CONSTRUCTOR, it means that there
5415 is a missing set of braces (that is, we are processing the case for
5416 which reshape_init exists). */
5417 if (!first_initializer_p
)
5419 if (TREE_CODE (init
) == CONSTRUCTOR
)
5421 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5422 /* There is no need to reshape pointer-to-member function
5423 initializers, as they are always constructed correctly
5424 by the front end. */
5426 else if (COMPOUND_LITERAL_P (init
))
5427 /* For a nested compound literal, there is no need to reshape since
5428 brace elision is not allowed. Even if we decided to allow it,
5429 we should add a call to reshape_init in finish_compound_literal,
5430 before calling digest_init, so changing this code would still
5431 not be necessary. */
5432 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5436 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5437 return reshape_init (type
, init
, complain
);
5441 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5445 /* Dispatch to specialized routines. */
5446 if (CLASS_TYPE_P (type
))
5447 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5448 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5449 return reshape_init_array (type
, d
, complain
);
5450 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5451 return reshape_init_vector (type
, d
, complain
);
5456 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5457 brace-enclosed aggregate initializer.
5459 INIT is the CONSTRUCTOR containing the list of initializers describing
5460 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5461 It may not presently match the shape of the TYPE; for example:
5463 struct S { int a; int b; };
5464 struct S a[] = { 1, 2, 3, 4 };
5466 Here INIT will hold a vector of four elements, rather than a
5467 vector of two elements, each itself a vector of two elements. This
5468 routine transforms INIT from the former form into the latter. The
5469 revised CONSTRUCTOR node is returned. */
5472 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5474 vec
<constructor_elt
, va_gc
> *v
;
5478 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5480 v
= CONSTRUCTOR_ELTS (init
);
5482 /* An empty constructor does not need reshaping, and it is always a valid
5484 if (vec_safe_is_empty (v
))
5487 /* Recurse on this CONSTRUCTOR. */
5489 d
.end
= d
.cur
+ v
->length ();
5491 new_init
= reshape_init_r (type
, &d
, true, complain
);
5492 if (new_init
== error_mark_node
)
5493 return error_mark_node
;
5495 /* Make sure all the element of the constructor were used. Otherwise,
5496 issue an error about exceeding initializers. */
5499 if (complain
& tf_error
)
5500 error ("too many initializers for %qT", type
);
5502 return error_mark_node
;
5508 /* Verify array initializer. Returns true if errors have been reported. */
5511 check_array_initializer (tree decl
, tree type
, tree init
)
5513 tree element_type
= TREE_TYPE (type
);
5515 /* The array type itself need not be complete, because the
5516 initializer may tell us how many elements are in the array.
5517 But, the elements of the array must be complete. */
5518 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5521 error ("elements of array %q#D have incomplete type", decl
);
5523 error ("elements of array %q#T have incomplete type", type
);
5526 /* A compound literal can't have variable size. */
5528 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5529 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5531 error ("variable-sized compound literal");
5537 /* Subroutine of check_initializer; args are passed down from that function.
5538 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5541 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5544 gcc_assert (stmts_are_full_exprs_p ());
5545 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5548 /* Verify INIT (the initializer for DECL), and record the
5549 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5550 grok_reference_init.
5552 If the return value is non-NULL, it is an expression that must be
5553 evaluated dynamically to initialize DECL. */
5556 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5558 tree type
= TREE_TYPE (decl
);
5559 tree init_code
= NULL
;
5560 tree extra_init
= NULL_TREE
;
5563 /* Things that are going to be initialized need to have complete
5565 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5567 if (DECL_HAS_VALUE_EXPR_P (decl
))
5569 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5570 it doesn't have storage to be initialized. */
5571 gcc_assert (init
== NULL_TREE
);
5575 if (type
== error_mark_node
)
5576 /* We will have already complained. */
5579 if (TREE_CODE (type
) == ARRAY_TYPE
)
5581 if (check_array_initializer (decl
, type
, init
))
5584 else if (!COMPLETE_TYPE_P (type
))
5586 error ("%q#D has incomplete type", decl
);
5587 TREE_TYPE (decl
) = error_mark_node
;
5591 /* There is no way to make a variable-sized class type in GNU C++. */
5592 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5594 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5596 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5597 if (SCALAR_TYPE_P (type
))
5601 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5602 init
= build_zero_init (type
, NULL_TREE
, false);
5604 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5606 error ("scalar object %qD requires one element in initializer",
5608 TREE_TYPE (decl
) = error_mark_node
;
5614 if (TREE_CODE (decl
) == CONST_DECL
)
5616 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5618 DECL_INITIAL (decl
) = init
;
5620 gcc_assert (init
!= NULL_TREE
);
5623 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5625 else if (init
|| type_build_ctor_call (type
)
5626 || TREE_CODE (type
) == REFERENCE_TYPE
)
5628 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5630 init
= grok_reference_init (decl
, type
, init
, flags
);
5631 flags
|= LOOKUP_ALREADY_DIGESTED
;
5634 check_for_uninitialized_const_var (decl
);
5635 /* Do not reshape constructors of vectors (they don't need to be
5637 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5639 if (is_std_init_list (type
))
5641 init
= perform_implicit_conversion (type
, init
,
5642 tf_warning_or_error
);
5643 flags
|= LOOKUP_ALREADY_DIGESTED
;
5645 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5647 /* Don't reshape if the class has constructors. */
5648 if (cxx_dialect
== cxx98
)
5649 error ("in C++98 %qD must be initialized by constructor, "
5653 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5655 error ("opaque vector types cannot be initialized");
5656 init
= error_mark_node
;
5660 init
= reshape_init (type
, init
, tf_warning_or_error
);
5661 if (SCALAR_TYPE_P (type
))
5662 check_narrowing (type
, init
);
5666 /* If DECL has an array type without a specific bound, deduce the
5667 array size from the initializer. */
5668 maybe_deduce_size_from_array_init (decl
, init
);
5669 type
= TREE_TYPE (decl
);
5670 if (type
== error_mark_node
)
5673 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5674 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5675 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5676 && CP_AGGREGATE_TYPE_P (type
)
5677 && (CLASS_TYPE_P (type
)
5678 || type_has_extended_temps (type
))))
5680 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5682 /* A constructor call is a non-trivial initializer even if
5683 it isn't explicitly written. */
5684 if (TREE_SIDE_EFFECTS (init_code
))
5685 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5687 /* If this is a constexpr initializer, expand_default_init will
5688 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5689 case, pull the initializer back out and pass it down into
5690 store_init_value. */
5691 while (TREE_CODE (init_code
) == EXPR_STMT
5692 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5693 init_code
= TREE_OPERAND (init_code
, 0);
5694 if (TREE_CODE (init_code
) == INIT_EXPR
)
5696 init
= TREE_OPERAND (init_code
, 1);
5697 init_code
= NULL_TREE
;
5698 /* Don't call digest_init; it's unnecessary and will complain
5699 about aggregate initialization of non-aggregate classes. */
5700 flags
|= LOOKUP_ALREADY_DIGESTED
;
5702 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5704 /* Declared constexpr, but no suitable initializer; massage
5705 init appropriately so we can pass it into store_init_value
5707 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5708 init
= finish_compound_literal (type
, init
,
5709 tf_warning_or_error
);
5710 else if (CLASS_TYPE_P (type
)
5711 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5713 init
= build_functional_cast (type
, init
, tf_none
);
5714 if (TREE_CODE (init
) == TARGET_EXPR
)
5715 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5717 init_code
= NULL_TREE
;
5723 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5725 /* In aggregate initialization of a variable, each element
5726 initialization is a full-expression because there is no
5727 enclosing expression. */
5728 gcc_assert (stmts_are_full_exprs_p ());
5730 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5732 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5733 && DECL_INITIAL (decl
)
5734 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5735 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5736 warning (0, "array %qD initialized by parenthesized string literal %qE",
5737 decl
, DECL_INITIAL (decl
));
5743 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5744 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5745 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5746 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5749 check_for_uninitialized_const_var (decl
);
5752 if (init
&& init
!= error_mark_node
)
5753 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5756 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5758 if (init_code
&& DECL_IN_AGGR_P (decl
))
5760 static int explained
= 0;
5762 if (cxx_dialect
< cxx11
)
5763 error ("initializer invalid for static member with constructor");
5765 error ("non-constant in-class initialization invalid for static "
5766 "member %qD", decl
);
5769 error ("(an out of class initialization is required)");
5777 /* If DECL is not a local variable, give it RTL. */
5780 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5782 int toplev
= toplevel_bindings_p ();
5784 const char *filename
;
5786 /* Set the DECL_ASSEMBLER_NAME for the object. */
5789 /* The `register' keyword, when used together with an
5790 asm-specification, indicates that the variable should be
5791 placed in a particular register. */
5792 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5794 set_user_assembler_name (decl
, asmspec
);
5795 DECL_HARD_REGISTER (decl
) = 1;
5799 if (TREE_CODE (decl
) == FUNCTION_DECL
5800 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5801 set_builtin_user_assembler_name (decl
, asmspec
);
5802 set_user_assembler_name (decl
, asmspec
);
5806 /* Handle non-variables up front. */
5809 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5813 /* If we see a class member here, it should be a static data
5815 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5817 gcc_assert (TREE_STATIC (decl
));
5818 /* An in-class declaration of a static data member should be
5819 external; it is only a declaration, and not a definition. */
5820 if (init
== NULL_TREE
)
5821 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5824 /* We don't create any RTL for local variables. */
5825 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5828 /* We defer emission of local statics until the corresponding
5829 DECL_EXPR is expanded. */
5830 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5832 /* We try to defer namespace-scope static constants so that they are
5833 not emitted into the object file unnecessarily. */
5834 filename
= input_filename
;
5835 if (!DECL_VIRTUAL_P (decl
)
5836 && TREE_READONLY (decl
)
5837 && DECL_INITIAL (decl
) != NULL_TREE
5838 && DECL_INITIAL (decl
) != error_mark_node
5840 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5842 && !TREE_PUBLIC (decl
))
5844 /* Fool with the linkage of static consts according to #pragma
5846 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5847 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5849 TREE_PUBLIC (decl
) = 1;
5850 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5855 /* Likewise for template instantiations. */
5856 else if (DECL_LANG_SPECIFIC (decl
)
5857 && DECL_IMPLICIT_INSTANTIATION (decl
))
5860 /* If we're not deferring, go ahead and assemble the variable. */
5862 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5865 /* walk_tree helper for wrap_temporary_cleanups, below. */
5868 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5870 /* Stop at types or full-expression boundaries. */
5871 if (TYPE_P (*stmt_p
)
5872 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5878 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5880 tree guard
= (tree
)data
;
5881 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5883 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5884 /* Tell honor_protect_cleanup_actions to handle this as a separate
5886 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5888 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5894 /* We're initializing a local variable which has a cleanup GUARD. If there
5895 are any temporaries used in the initializer INIT of this variable, we
5896 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5897 variable will be cleaned up properly if one of them throws.
5899 Unfortunately, there's no way to express this properly in terms of
5900 nesting, as the regions for the temporaries overlap the region for the
5901 variable itself; if there are two temporaries, the variable needs to be
5902 the first thing destroyed if either of them throws. However, we only
5903 want to run the variable's cleanup if it actually got constructed. So
5904 we need to guard the temporary cleanups with the variable's cleanup if
5905 they are run on the normal path, but not if they are run on the
5906 exceptional path. We implement this by telling
5907 honor_protect_cleanup_actions to strip the variable cleanup from the
5908 exceptional path. */
5911 wrap_temporary_cleanups (tree init
, tree guard
)
5913 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5916 /* Generate code to initialize DECL (a local variable). */
5919 initialize_local_var (tree decl
, tree init
)
5921 tree type
= TREE_TYPE (decl
);
5925 gcc_assert (VAR_P (decl
)
5926 || TREE_CODE (decl
) == RESULT_DECL
);
5927 gcc_assert (!TREE_STATIC (decl
));
5929 if (DECL_SIZE (decl
) == NULL_TREE
)
5931 /* If we used it already as memory, it must stay in memory. */
5932 DECL_INITIAL (decl
) = NULL_TREE
;
5933 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5937 if (type
== error_mark_node
)
5940 /* Compute and store the initial value. */
5941 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5942 if (TREE_USED (type
))
5943 DECL_READ_P (decl
) = 1;
5945 /* Generate a cleanup, if necessary. */
5946 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5948 /* Perform the initialization. */
5951 if (TREE_CODE (init
) == INIT_EXPR
5952 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5954 /* Stick simple initializers in DECL_INITIAL so that
5955 -Wno-init-self works (c++/34772). */
5956 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5957 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5961 int saved_stmts_are_full_exprs_p
;
5963 /* If we're only initializing a single object, guard the
5964 destructors of any temporaries used in its initializer with
5965 its destructor. This isn't right for arrays because each
5966 element initialization is a full-expression. */
5967 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5968 wrap_temporary_cleanups (init
, cleanup
);
5970 gcc_assert (building_stmt_list_p ());
5971 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5972 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5973 finish_expr_stmt (init
);
5974 current_stmt_tree ()->stmts_are_full_exprs_p
=
5975 saved_stmts_are_full_exprs_p
;
5979 /* Set this to 0 so we can tell whether an aggregate which was
5980 initialized was ever used. Don't do this if it has a
5981 destructor, so we don't complain about the 'resource
5982 allocation is initialization' idiom. Now set
5983 attribute((unused)) on types so decls of that type will be
5984 marked used. (see TREE_USED, above.) */
5985 if (TYPE_NEEDS_CONSTRUCTING (type
)
5987 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5988 && DECL_NAME (decl
))
5989 TREE_USED (decl
) = 0;
5990 else if (already_used
)
5991 TREE_USED (decl
) = 1;
5994 finish_decl_cleanup (decl
, cleanup
);
5997 /* DECL is a VAR_DECL for a compiler-generated variable with static
5998 storage duration (like a virtual table) whose initializer is a
5999 compile-time constant. Initialize the variable and provide it to the
6003 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6006 gcc_assert (DECL_ARTIFICIAL (decl
));
6007 init
= build_constructor (TREE_TYPE (decl
), v
);
6008 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6009 DECL_INITIAL (decl
) = init
;
6010 DECL_INITIALIZED_P (decl
) = 1;
6011 determine_visibility (decl
);
6012 layout_var_decl (decl
);
6013 maybe_commonize_var (decl
);
6014 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6017 /* INIT is the initializer for a variable, as represented by the
6018 parser. Returns true iff INIT is type-dependent. */
6021 type_dependent_init_p (tree init
)
6023 if (TREE_CODE (init
) == TREE_LIST
)
6024 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6025 return any_type_dependent_elements_p (init
);
6026 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6027 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6029 vec
<constructor_elt
, va_gc
> *elts
;
6033 elts
= CONSTRUCTOR_ELTS (init
);
6034 nelts
= vec_safe_length (elts
);
6035 for (i
= 0; i
< nelts
; ++i
)
6036 if (type_dependent_init_p ((*elts
)[i
].value
))
6040 /* It must be a simple expression, e.g., int i = 3; */
6041 return type_dependent_expression_p (init
);
6046 /* INIT is the initializer for a variable, as represented by the
6047 parser. Returns true iff INIT is value-dependent. */
6050 value_dependent_init_p (tree init
)
6052 if (TREE_CODE (init
) == TREE_LIST
)
6053 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6054 return any_value_dependent_elements_p (init
);
6055 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6056 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6058 vec
<constructor_elt
, va_gc
> *elts
;
6062 elts
= CONSTRUCTOR_ELTS (init
);
6063 nelts
= vec_safe_length (elts
);
6064 for (i
= 0; i
< nelts
; ++i
)
6065 if (value_dependent_init_p ((*elts
)[i
].value
))
6069 /* It must be a simple expression, e.g., int i = 3; */
6070 return value_dependent_expression_p (init
);
6075 /* Finish processing of a declaration;
6076 install its line number and initial value.
6077 If the length of an array type is not known before,
6078 it must be determined now, from the initial value, or it is an error.
6080 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6081 true, then INIT is an integral constant expression.
6083 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6084 if the (init) syntax was used. */
6087 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6088 tree asmspec_tree
, int flags
)
6091 vec
<tree
, va_gc
> *cleanups
= NULL
;
6092 const char *asmspec
= NULL
;
6093 int was_readonly
= 0;
6094 bool var_definition_p
= false;
6097 if (decl
== error_mark_node
)
6102 error ("assignment (not initialization) in declaration");
6106 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6107 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6108 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6110 type
= TREE_TYPE (decl
);
6111 if (type
== error_mark_node
)
6114 /* If a name was specified, get the string. */
6115 if (at_namespace_scope_p ())
6116 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6117 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6118 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6120 if (current_class_type
6121 && CP_DECL_CONTEXT (decl
) == current_class_type
6122 && TYPE_BEING_DEFINED (current_class_type
)
6123 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6124 && (DECL_INITIAL (decl
) || init
))
6125 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6127 if (TREE_CODE (decl
) != FUNCTION_DECL
6128 && (auto_node
= type_uses_auto (type
)))
6131 if (init
== NULL_TREE
)
6133 if (DECL_LANG_SPECIFIC (decl
)
6134 && DECL_TEMPLATE_INSTANTIATION (decl
)
6135 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6137 /* init is null because we're deferring instantiating the
6138 initializer until we need it. Well, we need it now. */
6139 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6143 error ("declaration of %q#D has no initializer", decl
);
6144 TREE_TYPE (decl
) = error_mark_node
;
6148 if (TREE_CODE (d_init
) == TREE_LIST
)
6149 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6150 tf_warning_or_error
);
6151 d_init
= resolve_nondeduced_context (d_init
);
6152 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6154 if (type
== error_mark_node
)
6156 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6159 if (!ensure_literal_type_for_constexpr_object (decl
))
6160 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6163 && DECL_CLASS_SCOPE_P (decl
)
6164 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6165 check_static_variable_definition (decl
, type
);
6167 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6170 if (init
== ridpointers
[(int)RID_DELETE
])
6172 /* FIXME check this is 1st decl. */
6173 DECL_DELETED_FN (decl
) = 1;
6174 DECL_DECLARED_INLINE_P (decl
) = 1;
6175 DECL_INITIAL (decl
) = error_mark_node
;
6176 FOR_EACH_CLONE (clone
, decl
)
6178 DECL_DELETED_FN (clone
) = 1;
6179 DECL_DECLARED_INLINE_P (clone
) = 1;
6180 DECL_INITIAL (clone
) = error_mark_node
;
6184 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6186 if (defaultable_fn_check (decl
))
6187 DECL_DEFAULTED_FN (decl
) = 1;
6189 DECL_INITIAL (decl
) = NULL_TREE
;
6193 if (init
&& VAR_P (decl
))
6195 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6196 /* If DECL is a reference, then we want to know whether init is a
6197 reference constant; init_const_expr_p as passed tells us whether
6198 it's an rvalue constant. */
6199 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6200 init_const_expr_p
= potential_constant_expression (init
);
6201 if (init_const_expr_p
)
6203 /* Set these flags now for templates. We'll update the flags in
6204 store_init_value for instantiations. */
6205 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6206 if (decl_maybe_constant_var_p (decl
))
6207 TREE_CONSTANT (decl
) = 1;
6211 if (processing_template_decl
)
6213 bool type_dependent_p
;
6215 /* Add this declaration to the statement-tree. */
6216 if (at_function_scope_p ())
6217 add_decl_expr (decl
);
6219 type_dependent_p
= dependent_type_p (type
);
6221 if (check_for_bare_parameter_packs (init
))
6224 DECL_INITIAL (decl
) = NULL_TREE
;
6227 /* Generally, initializers in templates are expanded when the
6228 template is instantiated. But, if DECL is a variable constant
6229 then it can be used in future constant expressions, so its value
6230 must be available. */
6232 if (!VAR_P (decl
) || dependent_type_p (type
))
6233 /* We can't do anything if the decl has dependent type. */;
6235 && init_const_expr_p
6236 && !type_dependent_p
6237 && decl_maybe_constant_var_p (decl
)
6238 && !type_dependent_init_p (init
)
6239 && !value_dependent_init_p (init
))
6241 /* This variable seems to be a non-dependent constant, so process
6242 its initializer. If check_initializer returns non-null the
6243 initialization wasn't constant after all. */
6245 cleanups
= make_tree_vector ();
6246 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6247 if (init_code
== NULL_TREE
)
6249 release_tree_vector (cleanups
);
6251 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6253 /* Deduce array size even if the initializer is dependent. */
6254 maybe_deduce_size_from_array_init (decl
, init
);
6255 /* And complain about multiple initializers. */
6256 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6257 && !MAYBE_CLASS_TYPE_P (type
))
6258 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6259 tf_warning_or_error
);
6263 DECL_INITIAL (decl
) = init
;
6267 /* Just store non-static data member initializers for later. */
6268 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6269 DECL_INITIAL (decl
) = init
;
6271 /* Take care of TYPE_DECLs up front. */
6272 if (TREE_CODE (decl
) == TYPE_DECL
)
6274 if (type
!= error_mark_node
6275 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6277 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6278 warning (0, "shadowing previous type declaration of %q#D", decl
);
6279 set_identifier_type_value (DECL_NAME (decl
), decl
);
6282 /* If we have installed this as the canonical typedef for this
6283 type, and that type has not been defined yet, delay emitting
6284 the debug information for it, as we will emit it later. */
6285 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6286 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6287 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6289 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6294 /* A reference will be modified here, as it is initialized. */
6295 if (! DECL_EXTERNAL (decl
)
6296 && TREE_READONLY (decl
)
6297 && TREE_CODE (type
) == REFERENCE_TYPE
)
6300 TREE_READONLY (decl
) = 0;
6305 /* If this is a local variable that will need a mangled name,
6306 register it now. We must do this before processing the
6307 initializer for the variable, since the initialization might
6308 require a guard variable, and since the mangled name of the
6309 guard variable will depend on the mangled name of this
6311 if (DECL_FUNCTION_SCOPE_P (decl
)
6312 && TREE_STATIC (decl
)
6313 && !DECL_ARTIFICIAL (decl
))
6315 push_local_name (decl
);
6316 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6317 || DECL_DESTRUCTOR_P (current_function_decl
))
6318 /* Normally local_decls is populated during GIMPLE lowering,
6319 but [cd]tors are never actually compiled directly. We need
6320 to put statics on the list so we can deal with the label
6321 address extension. FIXME. */
6322 add_local_decl (cfun
, decl
);
6325 /* Convert the initializer to the type of DECL, if we have not
6326 already initialized DECL. */
6327 if (!DECL_INITIALIZED_P (decl
)
6328 /* If !DECL_EXTERNAL then DECL is being defined. In the
6329 case of a static data member initialized inside the
6330 class-specifier, there can be an initializer even if DECL
6331 is *not* defined. */
6332 && (!DECL_EXTERNAL (decl
) || init
))
6334 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6337 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6338 /* Allow libjava/prims.cc define primitive classes. */
6339 if (init
!= NULL_TREE
6340 || jclass
== NULL_TREE
6341 || TREE_CODE (jclass
) != TYPE_DECL
6342 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6343 || !same_type_ignoring_top_level_qualifiers_p
6344 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6345 error ("Java object %qD not allocated with %<new%>", decl
);
6348 cleanups
= make_tree_vector ();
6349 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6355 The memory occupied by any object of static storage
6356 duration is zero-initialized at program startup before
6357 any other initialization takes place.
6359 We cannot create an appropriate initializer until after
6360 the type of DECL is finalized. If DECL_INITIAL is set,
6361 then the DECL is statically initialized, and any
6362 necessary zero-initialization has already been performed. */
6363 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6364 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6365 /*nelts=*/NULL_TREE
,
6366 /*static_storage_p=*/true);
6367 /* Remember that the initialization for this variable has
6369 DECL_INITIALIZED_P (decl
) = 1;
6370 /* This declaration is the definition of this variable,
6371 unless we are initializing a static data member within
6372 the class specifier. */
6373 if (!DECL_EXTERNAL (decl
))
6374 var_definition_p
= true;
6376 /* If the variable has an array type, lay out the type, even if
6377 there is no initializer. It is valid to index through the
6378 array, and we must get TYPE_ALIGN set correctly on the array
6380 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6383 if (TREE_STATIC (decl
)
6384 && !at_function_scope_p ()
6385 && current_function_decl
== NULL
)
6386 /* So decl is a global variable or a static member of a
6387 non local class. Record the types it uses
6388 so that we can decide later to emit debug info for them. */
6389 record_types_used_by_current_var_decl (decl
);
6391 else if (TREE_CODE (decl
) == FIELD_DECL
6392 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6393 error ("non-static data member %qD has Java class type", decl
);
6395 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
6397 /* If the VLA bound is larger than half the address space, or less
6398 than zero, throw std::bad_array_length. */
6399 tree max
= convert (ssizetype
, TYPE_MAX_VALUE (TYPE_DOMAIN (type
)));
6400 /* C++1y says we should throw for length <= 0, but we have
6401 historically supported zero-length arrays. Let's treat that as an
6402 extension to be disabled by -std=c++NN. */
6403 int lower
= flag_iso
? 0 : -1;
6404 tree comp
= build2 (LT_EXPR
, boolean_type_node
, max
, ssize_int (lower
));
6405 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
6406 throw_bad_array_length (), void_zero_node
);
6407 finish_expr_stmt (comp
);
6410 /* Add this declaration to the statement-tree. This needs to happen
6411 after the call to check_initializer so that the DECL_EXPR for a
6412 reference temp is added before the DECL_EXPR for the reference itself. */
6413 if (DECL_FUNCTION_SCOPE_P (decl
))
6414 add_decl_expr (decl
);
6416 /* Let the middle end know about variables and functions -- but not
6417 static data members in uninstantiated class templates. */
6418 if (VAR_OR_FUNCTION_DECL_P (decl
))
6422 layout_var_decl (decl
);
6423 maybe_commonize_var (decl
);
6426 /* This needs to happen after the linkage is set. */
6427 determine_visibility (decl
);
6429 if (var_definition_p
&& TREE_STATIC (decl
))
6431 /* If a TREE_READONLY variable needs initialization
6432 at runtime, it is no longer readonly and we need to
6433 avoid MEM_READONLY_P being set on RTL created for it. */
6436 if (TREE_READONLY (decl
))
6437 TREE_READONLY (decl
) = 0;
6440 else if (was_readonly
)
6441 TREE_READONLY (decl
) = 1;
6443 /* Likewise if it needs destruction. */
6444 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6445 TREE_READONLY (decl
) = 0;
6448 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6450 /* Check for abstractness of the type. Notice that there is no
6451 need to strip array types here since the check for those types
6452 is already done within create_array_type_for_decl. */
6453 abstract_virtuals_error (decl
, type
);
6455 if (TREE_TYPE (decl
) == error_mark_node
)
6456 /* No initialization required. */
6458 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6462 if (init
== ridpointers
[(int)RID_DEFAULT
])
6464 /* An out-of-class default definition is defined at
6465 the point where it is explicitly defaulted. */
6466 if (DECL_DELETED_FN (decl
))
6467 maybe_explain_implicit_delete (decl
);
6468 else if (DECL_INITIAL (decl
) == error_mark_node
)
6469 synthesize_method (decl
);
6472 error ("function %q#D is initialized like a variable", decl
);
6474 /* else no initialization required. */
6476 else if (DECL_EXTERNAL (decl
)
6477 && ! (DECL_LANG_SPECIFIC (decl
)
6478 && DECL_NOT_REALLY_EXTERN (decl
)))
6481 DECL_INITIAL (decl
) = init
;
6483 /* A variable definition. */
6484 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6485 /* Initialize the local variable. */
6486 initialize_local_var (decl
, init
);
6488 /* If a variable is defined, and then a subsequent
6489 definition with external linkage is encountered, we will
6490 get here twice for the same variable. We want to avoid
6491 calling expand_static_init more than once. For variables
6492 that are not static data members, we can call
6493 expand_static_init only when we actually process the
6494 initializer. It is not legal to redeclare a static data
6495 member, so this issue does not arise in that case. */
6496 else if (var_definition_p
&& TREE_STATIC (decl
))
6497 expand_static_init (decl
, init
);
6500 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6501 reference, insert it in the statement-tree now. */
6505 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6506 push_cleanup (decl
, t
, false);
6507 release_tree_vector (cleanups
);
6511 TREE_READONLY (decl
) = 1;
6513 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6516 /* Returns a declaration for a VAR_DECL as if:
6518 extern "C" TYPE NAME;
6520 had been seen. Used to create compiler-generated global
6524 declare_global_var (tree name
, tree type
)
6528 push_to_top_level ();
6529 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6530 TREE_PUBLIC (decl
) = 1;
6531 DECL_EXTERNAL (decl
) = 1;
6532 DECL_ARTIFICIAL (decl
) = 1;
6533 /* If the user has explicitly declared this variable (perhaps
6534 because the code we are compiling is part of a low-level runtime
6535 library), then it is possible that our declaration will be merged
6536 with theirs by pushdecl. */
6537 decl
= pushdecl (decl
);
6538 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6539 pop_from_top_level ();
6544 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6545 if "__cxa_atexit" is not being used) corresponding to the function
6546 to be called when the program exits. */
6549 get_atexit_fn_ptr_type (void)
6553 if (!atexit_fn_ptr_type_node
)
6556 if (flag_use_cxa_atexit
6557 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6558 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6559 arg_type
= ptr_type_node
;
6561 /* The parameter to "atexit" is "void (*)(void)". */
6562 arg_type
= NULL_TREE
;
6564 fn_type
= build_function_type_list (void_type_node
,
6565 arg_type
, NULL_TREE
);
6566 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6569 return atexit_fn_ptr_type_node
;
6572 /* Returns a pointer to the `atexit' function. Note that if
6573 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6574 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6577 get_atexit_node (void)
6583 bool use_aeabi_atexit
;
6588 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6590 /* The declaration for `__cxa_atexit' is:
6592 int __cxa_atexit (void (*)(void *), void *, void *)
6594 We build up the argument types and then the function type
6596 tree argtype0
, argtype1
, argtype2
;
6598 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6599 /* First, build the pointer-to-function type for the first
6601 fn_ptr_type
= get_atexit_fn_ptr_type ();
6602 /* Then, build the rest of the argument types. */
6603 argtype2
= ptr_type_node
;
6604 if (use_aeabi_atexit
)
6606 argtype1
= fn_ptr_type
;
6607 argtype0
= ptr_type_node
;
6611 argtype1
= ptr_type_node
;
6612 argtype0
= fn_ptr_type
;
6614 /* And the final __cxa_atexit type. */
6615 fn_type
= build_function_type_list (integer_type_node
,
6616 argtype0
, argtype1
, argtype2
,
6618 if (use_aeabi_atexit
)
6619 name
= "__aeabi_atexit";
6621 name
= "__cxa_atexit";
6625 /* The declaration for `atexit' is:
6627 int atexit (void (*)());
6629 We build up the argument types and then the function type
6631 fn_ptr_type
= get_atexit_fn_ptr_type ();
6632 /* Build the final atexit type. */
6633 fn_type
= build_function_type_list (integer_type_node
,
6634 fn_ptr_type
, NULL_TREE
);
6638 /* Now, build the function declaration. */
6639 push_lang_context (lang_name_c
);
6640 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6641 mark_used (atexit_fndecl
);
6642 pop_lang_context ();
6643 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6648 /* Like get_atexit_node, but for thread-local cleanups. */
6651 get_thread_atexit_node (void)
6653 /* The declaration for `__cxa_thread_atexit' is:
6655 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6656 tree fn_type
= build_function_type_list (integer_type_node
,
6657 get_atexit_fn_ptr_type (),
6658 ptr_type_node
, ptr_type_node
,
6661 /* Now, build the function declaration. */
6662 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
);
6663 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6666 /* Returns the __dso_handle VAR_DECL. */
6669 get_dso_handle_node (void)
6671 if (dso_handle_node
)
6672 return dso_handle_node
;
6674 /* Declare the variable. */
6675 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6678 #ifdef HAVE_GAS_HIDDEN
6679 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6680 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6683 return dso_handle_node
;
6686 /* Begin a new function with internal linkage whose job will be simply
6687 to destroy some particular variable. */
6689 static GTY(()) int start_cleanup_cnt
;
6692 start_cleanup_fn (void)
6697 bool use_cxa_atexit
= flag_use_cxa_atexit
6698 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6700 push_to_top_level ();
6702 /* No need to mangle this. */
6703 push_lang_context (lang_name_c
);
6705 /* Build the name of the function. */
6706 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6707 /* Build the function declaration. */
6708 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6709 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6710 /* It's a function with internal linkage, generated by the
6712 TREE_PUBLIC (fndecl
) = 0;
6713 DECL_ARTIFICIAL (fndecl
) = 1;
6714 /* Make the function `inline' so that it is only emitted if it is
6715 actually needed. It is unlikely that it will be inlined, since
6716 it is only called via a function pointer, but we avoid unnecessary
6717 emissions this way. */
6718 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6719 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6720 /* Build the parameter. */
6725 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6726 DECL_CONTEXT (parmdecl
) = fndecl
;
6727 TREE_USED (parmdecl
) = 1;
6728 DECL_READ_P (parmdecl
) = 1;
6729 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6733 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6735 pop_lang_context ();
6737 return current_function_decl
;
6740 /* Finish the cleanup function begun by start_cleanup_fn. */
6743 end_cleanup_fn (void)
6745 expand_or_defer_fn (finish_function (0));
6747 pop_from_top_level ();
6750 /* Generate code to handle the destruction of DECL, an object with
6751 static storage duration. */
6754 register_dtor_fn (tree decl
)
6761 bool ob_parm
, dso_parm
, use_dtor
;
6762 tree arg0
, arg1
, arg2
;
6765 type
= TREE_TYPE (decl
);
6766 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6767 return void_zero_node
;
6769 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6770 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6771 destructor to "__cxa_atexit"; we don't have to build a temporary
6772 function to do the cleanup. */
6773 dso_parm
= (flag_use_cxa_atexit
6774 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6775 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6776 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6781 /* Find the destructor. */
6782 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6783 gcc_assert (idx
>= 0);
6784 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6785 /* Make sure it is accessible. */
6786 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6787 tf_warning_or_error
);
6791 /* Call build_cleanup before we enter the anonymous function so
6792 that any access checks will be done relative to the current
6793 scope, rather than the scope of the anonymous function. */
6794 build_cleanup (decl
);
6796 /* Now start the function. */
6797 cleanup
= start_cleanup_fn ();
6799 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6800 to the original function, rather than the anonymous one. That
6801 will make the back end think that nested functions are in use,
6802 which causes confusion. */
6803 push_deferring_access_checks (dk_no_check
);
6804 fcall
= build_cleanup (decl
);
6805 pop_deferring_access_checks ();
6807 /* Create the body of the anonymous function. */
6808 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6809 finish_expr_stmt (fcall
);
6810 finish_compound_stmt (compound_stmt
);
6814 /* Call atexit with the cleanup function. */
6815 mark_used (cleanup
);
6816 cleanup
= build_address (cleanup
);
6818 if (DECL_THREAD_LOCAL_P (decl
))
6819 atex_node
= get_thread_atexit_node ();
6821 atex_node
= get_atexit_node ();
6825 /* We must convert CLEANUP to the type that "__cxa_atexit"
6827 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6828 /* "__cxa_atexit" will pass the address of DECL to the
6829 cleanup function. */
6831 addr
= build_address (decl
);
6832 /* The declared type of the parameter to "__cxa_atexit" is
6833 "void *". For plain "T*", we could just let the
6834 machinery in cp_build_function_call convert it -- but if the
6835 type is "cv-qualified T *", then we need to convert it
6836 before passing it in, to avoid spurious errors. */
6837 addr
= build_nop (ptr_type_node
, addr
);
6840 /* Since the cleanup functions we build ignore the address
6841 they're given, there's no reason to pass the actual address
6842 in, and, in general, it's cheaper to pass NULL than any
6844 addr
= null_pointer_node
;
6847 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6848 tf_warning_or_error
);
6850 /* Just pass NULL to the dso handle parm if we don't actually
6851 have a DSO handle on this target. */
6852 arg2
= null_pointer_node
;
6858 if (!DECL_THREAD_LOCAL_P (decl
)
6859 && targetm
.cxx
.use_aeabi_atexit ())
6875 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6876 arg0
, arg1
, arg2
, NULL_TREE
);
6879 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6880 is its initializer. Generate code to handle the construction
6881 and destruction of DECL. */
6884 expand_static_init (tree decl
, tree init
)
6886 gcc_assert (VAR_P (decl
));
6887 gcc_assert (TREE_STATIC (decl
));
6889 /* Some variables require no dynamic initialization. */
6891 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6894 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6895 && !DECL_FUNCTION_SCOPE_P (decl
))
6898 error ("non-local variable %qD declared %<__thread%> "
6899 "needs dynamic initialization", decl
);
6901 error ("non-local variable %qD declared %<__thread%> "
6902 "has a non-trivial destructor", decl
);
6903 static bool informed
;
6906 inform (DECL_SOURCE_LOCATION (decl
),
6907 "C++11 %<thread_local%> allows dynamic initialization "
6914 if (DECL_FUNCTION_SCOPE_P (decl
))
6916 /* Emit code to perform this initialization but once. */
6917 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6918 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6919 tree guard
, guard_addr
;
6921 /* We don't need thread-safety code for thread-local vars. */
6922 bool thread_guard
= (flag_threadsafe_statics
6923 && !DECL_THREAD_LOCAL_P (decl
));
6925 /* Emit code to perform this initialization but once. This code
6928 static <type> guard;
6929 if (!guard.first_byte) {
6930 if (__cxa_guard_acquire (&guard)) {
6933 // Do initialization.
6934 flag = true; __cxa_guard_release (&guard);
6935 // Register variable for destruction at end of program.
6937 if (!flag) __cxa_guard_abort (&guard);
6941 Note that the `flag' variable is only set to 1 *after* the
6942 initialization is complete. This ensures that an exception,
6943 thrown during the construction, will cause the variable to
6944 reinitialized when we pass through this code again, as per:
6948 If the initialization exits by throwing an exception, the
6949 initialization is not complete, so it will be tried again
6950 the next time control enters the declaration.
6952 This process should be thread-safe, too; multiple threads
6953 should not be able to initialize the variable more than
6956 /* Create the guard variable. */
6957 guard
= get_guard (decl
);
6959 /* This optimization isn't safe on targets with relaxed memory
6960 consistency. On such targets we force synchronization in
6961 __cxa_guard_acquire. */
6962 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6964 /* Begin the conditional initialization. */
6965 if_stmt
= begin_if_stmt ();
6966 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6967 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6972 tree vfntype
= NULL_TREE
;
6973 tree acquire_name
, release_name
, abort_name
;
6974 tree acquire_fn
, release_fn
, abort_fn
;
6975 guard_addr
= build_address (guard
);
6977 acquire_name
= get_identifier ("__cxa_guard_acquire");
6978 release_name
= get_identifier ("__cxa_guard_release");
6979 abort_name
= get_identifier ("__cxa_guard_abort");
6980 acquire_fn
= identifier_global_value (acquire_name
);
6981 release_fn
= identifier_global_value (release_name
);
6982 abort_fn
= identifier_global_value (abort_name
);
6984 acquire_fn
= push_library_fn
6985 (acquire_name
, build_function_type_list (integer_type_node
,
6986 TREE_TYPE (guard_addr
),
6989 if (!release_fn
|| !abort_fn
)
6990 vfntype
= build_function_type_list (void_type_node
,
6991 TREE_TYPE (guard_addr
),
6994 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6996 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6998 inner_if_stmt
= begin_if_stmt ();
6999 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7002 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7003 begin
= get_target_expr (boolean_false_node
);
7004 flag
= TARGET_EXPR_SLOT (begin
);
7006 TARGET_EXPR_CLEANUP (begin
)
7007 = build3 (COND_EXPR
, void_type_node
, flag
,
7009 build_call_n (abort_fn
, 1, guard_addr
));
7010 CLEANUP_EH_ONLY (begin
) = 1;
7012 /* Do the initialization itself. */
7013 init
= add_stmt_to_compound (begin
, init
);
7014 init
= add_stmt_to_compound
7015 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7016 init
= add_stmt_to_compound
7017 (init
, build_call_n (release_fn
, 1, guard_addr
));
7020 init
= add_stmt_to_compound (init
, set_guard (guard
));
7022 /* Use atexit to register a function for destroying this static
7024 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7026 finish_expr_stmt (init
);
7030 finish_compound_stmt (inner_then_clause
);
7031 finish_then_clause (inner_if_stmt
);
7032 finish_if_stmt (inner_if_stmt
);
7035 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7037 finish_compound_stmt (then_clause
);
7038 finish_then_clause (if_stmt
);
7039 finish_if_stmt (if_stmt
);
7042 else if (DECL_THREAD_LOCAL_P (decl
))
7043 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7045 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7049 /* Make TYPE a complete type based on INITIAL_VALUE.
7050 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7051 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7052 3 if the initializer list is empty (in pedantic mode). */
7055 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7058 tree type
, elt_type
;
7062 unsigned HOST_WIDE_INT i
;
7065 /* An array of character type can be initialized from a
7066 brace-enclosed string constant.
7068 FIXME: this code is duplicated from reshape_init. Probably
7069 we should just call reshape_init here? */
7070 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7071 && TREE_CODE (initial_value
) == CONSTRUCTOR
7072 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7074 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7075 tree value
= (*v
)[0].value
;
7077 if (TREE_CODE (value
) == STRING_CST
7078 && v
->length () == 1)
7079 initial_value
= value
;
7082 /* If any of the elements are parameter packs, we can't actually
7083 complete this type now because the array size is dependent. */
7084 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7086 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7089 if (PACK_EXPANSION_P (value
))
7095 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7097 /* We can create the array before the element type is complete, which
7098 means that we didn't have these two bits set in the original type
7099 either. In completing the type, we are expected to propagate these
7100 bits. See also complete_type which does the same thing for arrays
7103 if (TYPE_DOMAIN (type
))
7105 elt_type
= TREE_TYPE (type
);
7106 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7107 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7108 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7114 /* As above, but either give an error or reject zero-size arrays, depending
7118 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7119 bool do_default
, tsubst_flags_t complain
)
7122 bool sfinae
= !(complain
& tf_error
);
7123 /* In SFINAE context we can't be lenient about zero-size arrays. */
7126 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7132 /* Not an error. */;
7133 else if (failure
== 1)
7134 error ("initializer fails to determine size of %qT", *ptype
);
7135 else if (failure
== 2)
7138 error ("array size missing in %qT", *ptype
);
7140 else if (failure
== 3)
7141 error ("zero-size array %qT", *ptype
);
7142 *ptype
= error_mark_node
;
7147 /* Return zero if something is declared to be a member of type
7148 CTYPE when in the context of CUR_TYPE. STRING is the error
7149 message to print in that case. Otherwise, quietly return 1. */
7152 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7154 if (ctype
&& ctype
!= cur_type
)
7156 if (flags
== DTOR_FLAG
)
7157 error ("destructor for alien class %qT cannot be a member", ctype
);
7159 error ("constructor for alien class %qT cannot be a member", ctype
);
7165 /* Subroutine of `grokdeclarator'. */
7167 /* Generate errors possibly applicable for a given set of specifiers.
7168 This is for ARM $7.1.2. */
7171 bad_specifiers (tree object
,
7172 enum bad_spec_place type
,
7183 error ("%qD declared as a %<virtual%> variable", object
);
7185 error ("%qD declared as an %<inline%> variable", object
);
7187 error ("%<const%> and %<volatile%> function specifiers on "
7188 "%qD invalid in variable declaration", object
);
7192 error ("%qD declared as a %<virtual%> parameter", object
);
7194 error ("%qD declared as an %<inline%> parameter", object
);
7196 error ("%<const%> and %<volatile%> function specifiers on "
7197 "%qD invalid in parameter declaration", object
);
7201 error ("%qD declared as a %<virtual%> type", object
);
7203 error ("%qD declared as an %<inline%> type", object
);
7205 error ("%<const%> and %<volatile%> function specifiers on "
7206 "%qD invalid in type declaration", object
);
7210 error ("%qD declared as a %<virtual%> field", object
);
7212 error ("%qD declared as an %<inline%> field", object
);
7214 error ("%<const%> and %<volatile%> function specifiers on "
7215 "%qD invalid in field declaration", object
);
7221 error ("%q+D declared as a friend", object
);
7223 && (TREE_CODE (object
) == TYPE_DECL
7224 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7225 && !TYPE_REFFN_P (TREE_TYPE (object
))
7226 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7227 error ("%q+D declared with an exception specification", object
);
7230 /* DECL is a member function or static data member and is presently
7231 being defined. Check that the definition is taking place in a
7235 check_class_member_definition_namespace (tree decl
)
7237 /* These checks only apply to member functions and static data
7239 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7240 /* We check for problems with specializations in pt.c in
7241 check_specialization_namespace, where we can issue better
7243 if (processing_specialization
)
7245 /* There are no restrictions on the placement of
7246 explicit instantiations. */
7247 if (processing_explicit_instantiation
)
7251 A member function definition that appears outside of the
7252 class definition shall appear in a namespace scope enclosing
7253 the class definition.
7257 The definition for a static data member shall appear in a
7258 namespace scope enclosing the member's class definition. */
7259 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7260 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7261 decl
, DECL_CONTEXT (decl
));
7264 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7265 METHOD_TYPE for a non-static member function; QUALS are the
7266 cv-qualifiers that apply to the function. */
7269 build_this_parm (tree type
, cp_cv_quals quals
)
7274 cp_cv_quals this_quals
;
7276 if (CLASS_TYPE_P (type
))
7279 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7280 this_type
= build_pointer_type (this_type
);
7283 this_type
= type_of_this_parm (type
);
7284 /* The `this' parameter is implicitly `const'; it cannot be
7286 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7287 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7288 parm
= build_artificial_parm (this_identifier
, qual_type
);
7289 cp_apply_type_quals_to_decl (this_quals
, parm
);
7293 /* DECL is a static member function. Complain if it was declared
7294 with function-cv-quals. */
7297 check_static_quals (tree decl
, cp_cv_quals quals
)
7299 if (quals
!= TYPE_UNQUALIFIED
)
7300 error ("static member function %q#D declared with type qualifiers",
7304 /* CTYPE is class type, or null if non-class.
7305 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7307 DECLARATOR is the function's name.
7308 PARMS is a chain of PARM_DECLs for the function.
7309 VIRTUALP is truthvalue of whether the function is virtual or not.
7310 FLAGS are to be passed through to `grokclassfn'.
7311 QUALS are qualifiers indicating whether the function is `const'
7313 RAISES is a list of exceptions that this function can raise.
7314 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7315 not look, and -1 if we should not call `grokclassfn' at all.
7317 SFK is the kind of special function (if any) for the new function.
7319 Returns `NULL_TREE' if something goes wrong, after issuing
7320 applicable error messages. */
7323 grokfndecl (tree ctype
,
7327 tree orig_declarator
,
7329 enum overload_flags flags
,
7331 cp_ref_qualifier rqual
,
7337 special_function_kind sfk
,
7342 location_t location
)
7345 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7349 type
= build_ref_qualified_type (type
, rqual
);
7351 type
= build_exception_variant (type
, raises
);
7353 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7355 /* If we have an explicit location, use it, otherwise use whatever
7356 build_lang_decl used (probably input_location). */
7357 if (location
!= UNKNOWN_LOCATION
)
7358 DECL_SOURCE_LOCATION (decl
) = location
;
7360 if (TREE_CODE (type
) == METHOD_TYPE
)
7363 parm
= build_this_parm (type
, quals
);
7364 DECL_CHAIN (parm
) = parms
;
7367 DECL_ARGUMENTS (decl
) = parms
;
7368 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7369 DECL_CONTEXT (t
) = decl
;
7370 /* Propagate volatile out from type to decl. */
7371 if (TYPE_VOLATILE (type
))
7372 TREE_THIS_VOLATILE (decl
) = 1;
7374 /* Setup decl according to sfk. */
7377 case sfk_constructor
:
7378 case sfk_copy_constructor
:
7379 case sfk_move_constructor
:
7380 DECL_CONSTRUCTOR_P (decl
) = 1;
7382 case sfk_destructor
:
7383 DECL_DESTRUCTOR_P (decl
) = 1;
7389 /* If pointers to member functions use the least significant bit to
7390 indicate whether a function is virtual, ensure a pointer
7391 to this function will have that bit clear. */
7392 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7393 && TREE_CODE (type
) == METHOD_TYPE
7394 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7395 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7398 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7402 ("defining explicit specialization %qD in friend declaration",
7406 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7407 tree args
= TREE_OPERAND (orig_declarator
, 1);
7409 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7411 /* Something like `template <class T> friend void f<T>()'. */
7412 error ("invalid use of template-id %qD in declaration "
7413 "of primary template",
7419 /* A friend declaration of the form friend void f<>(). Record
7420 the information in the TEMPLATE_ID_EXPR. */
7421 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7423 if (TREE_CODE (fns
) == COMPONENT_REF
)
7425 /* Due to bison parser ickiness, we will have already looked
7426 up an operator_name or PFUNCNAME within the current class
7427 (see template_id in parse.y). If the current class contains
7428 such a name, we'll get a COMPONENT_REF here. Undo that. */
7430 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7431 == current_class_type
);
7432 fns
= TREE_OPERAND (fns
, 1);
7434 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7435 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7437 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7438 if (TREE_PURPOSE (t
)
7439 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7441 error ("default arguments are not allowed in declaration "
7442 "of friend template specialization %qD",
7448 error ("%<inline%> is not allowed in declaration of friend "
7449 "template specialization %qD",
7452 error ("%<constexpr%> is not allowed in declaration of friend "
7453 "template specialization %qD",
7460 /* If this decl has namespace scope, set that up. */
7462 set_decl_namespace (decl
, in_namespace
, friendp
);
7464 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7466 /* `main' and builtins have implicit 'C' linkage. */
7467 if ((MAIN_NAME_P (declarator
)
7468 || (IDENTIFIER_LENGTH (declarator
) > 10
7469 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7470 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7471 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7472 && current_lang_name
== lang_name_cplusplus
7473 && ctype
== NULL_TREE
7474 && DECL_FILE_SCOPE_P (decl
))
7475 SET_DECL_LANGUAGE (decl
, lang_c
);
7477 /* Should probably propagate const out from type to decl I bet (mrs). */
7480 DECL_STATIC_FUNCTION_P (decl
) = 1;
7481 DECL_CONTEXT (decl
) = ctype
;
7486 DECL_CONTEXT (decl
) = ctype
;
7488 check_class_member_definition_namespace (decl
);
7491 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7493 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7494 error ("cannot declare %<::main%> to be a template");
7496 error ("cannot declare %<::main%> to be inline");
7498 error ("cannot declare %<::main%> to be constexpr");
7500 error ("cannot declare %<::main%> to be static");
7505 /* Members of anonymous types and local classes have no linkage; make
7506 them internal. If a typedef is made later, this will be changed. */
7507 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7508 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7511 if (publicp
&& cxx_dialect
== cxx98
)
7513 /* [basic.link]: A name with no linkage (notably, the name of a class
7514 or enumeration declared in a local scope) shall not be used to
7515 declare an entity with linkage.
7517 DR 757 relaxes this restriction for C++0x. */
7518 t
= no_linkage_check (TREE_TYPE (decl
),
7519 /*relaxed_p=*/false);
7522 if (TYPE_ANONYMOUS_P (t
))
7524 if (DECL_EXTERN_C_P (decl
))
7525 /* Allow this; it's pretty common in C. */;
7528 permerror (input_location
, "anonymous type with no linkage "
7529 "used to declare function %q#D with linkage",
7531 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7532 permerror (input_location
, "%q+#D does not refer to the unqualified "
7533 "type, so it is not used for linkage",
7538 permerror (input_location
, "type %qT with no linkage used to "
7539 "declare function %q#D with linkage", t
, decl
);
7543 TREE_PUBLIC (decl
) = publicp
;
7546 DECL_INTERFACE_KNOWN (decl
) = 1;
7547 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7550 /* If the declaration was declared inline, mark it as such. */
7552 DECL_DECLARED_INLINE_P (decl
) = 1;
7554 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7556 DECL_EXTERNAL (decl
) = 1;
7557 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7562 ? G_("static member function %qD cannot have cv-qualifier")
7563 : G_("non-member function %qD cannot have cv-qualifier"),
7565 quals
= TYPE_UNQUALIFIED
;
7571 ? G_("static member function %qD cannot have ref-qualifier")
7572 : G_("non-member function %qD cannot have ref-qualifier"),
7574 rqual
= REF_QUAL_NONE
;
7578 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7579 && !grok_op_properties (decl
, /*complain=*/true))
7581 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7583 bool long_long_unsigned_p
;
7585 const char *suffix
= NULL
;
7586 /* [over.literal]/6: Literal operators shall not have C linkage. */
7587 if (DECL_LANGUAGE (decl
) == lang_c
)
7589 error ("literal operator with C linkage");
7593 if (DECL_NAMESPACE_SCOPE_P (decl
))
7595 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7598 error ("%qD has invalid argument list", decl
);
7602 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7603 if (long_long_unsigned_p
)
7605 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7606 warning (0, "integer suffix %<%s%>"
7607 " shadowed by implementation", suffix
);
7609 else if (long_double_p
)
7611 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7612 warning (0, "floating point suffix %<%s%>"
7613 " shadowed by implementation", suffix
);
7618 error ("%qD must be a non-member function", decl
);
7624 /* Make the init_value nonzero so pushdecl knows this is not
7625 tentative. error_mark_node is replaced later with the BLOCK. */
7626 DECL_INITIAL (decl
) = error_mark_node
;
7628 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7629 TREE_NOTHROW (decl
) = 1;
7631 /* Caller will do the rest of this. */
7635 if (ctype
!= NULL_TREE
)
7636 grokclassfn (ctype
, decl
, flags
);
7639 if (cxx_dialect
>= cxx11
7640 && DECL_DESTRUCTOR_P (decl
)
7641 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7642 && !processing_template_decl
)
7643 deduce_noexcept_on_destructor (decl
);
7645 decl
= check_explicit_specialization (orig_declarator
, decl
,
7648 4 * (friendp
!= 0));
7649 if (decl
== error_mark_node
)
7652 if (DECL_STATIC_FUNCTION_P (decl
))
7653 check_static_quals (decl
, quals
);
7657 cplus_decl_attributes (&decl
, *attrlist
, 0);
7658 *attrlist
= NULL_TREE
;
7661 /* Check main's type after attributes have been applied. */
7662 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7664 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7667 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7669 error ("%<::main%> must return %<int%>");
7670 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7671 TREE_TYPE (decl
) = newtype
;
7674 check_main_parameter_types (decl
);
7677 if (ctype
!= NULL_TREE
7678 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7681 tree old_decl
= check_classfn (ctype
, decl
,
7682 (processing_template_decl
7683 > template_class_depth (ctype
))
7684 ? current_template_parms
7687 if (old_decl
== error_mark_node
)
7695 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7696 /* Because grokfndecl is always supposed to return a
7697 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7698 here. We depend on our callers to figure out that its
7699 really a template that's being returned. */
7700 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7702 if (DECL_STATIC_FUNCTION_P (old_decl
)
7703 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7705 /* Remove the `this' parm added by grokclassfn. */
7706 revert_static_member_fn (decl
);
7707 check_static_quals (decl
, quals
);
7709 if (DECL_ARTIFICIAL (old_decl
))
7711 error ("definition of implicitly-declared %qD", old_decl
);
7714 else if (DECL_DEFAULTED_FN (old_decl
))
7716 error ("definition of explicitly-defaulted %q+D", decl
);
7717 error ("%q+#D explicitly defaulted here", old_decl
);
7721 /* Since we've smashed OLD_DECL to its
7722 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7723 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7724 decl
= DECL_TEMPLATE_RESULT (decl
);
7726 /* Attempt to merge the declarations. This can fail, in
7727 the case of some invalid specialization declarations. */
7728 pushed_scope
= push_scope (ctype
);
7729 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7731 pop_scope (pushed_scope
);
7734 error ("no %q#D member function declared in class %qT",
7742 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7745 if (ctype
== NULL_TREE
|| check
)
7749 DECL_VIRTUAL_P (decl
) = 1;
7754 /* decl is a FUNCTION_DECL.
7755 specifiers are the parsed virt-specifiers.
7757 Set flags to reflect the virt-specifiers.
7762 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7764 if (decl
== NULL_TREE
)
7766 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7767 DECL_OVERRIDE_P (decl
) = 1;
7768 if (specifiers
& VIRT_SPEC_FINAL
)
7769 DECL_FINAL_P (decl
) = 1;
7773 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7774 the linkage that DECL will receive in the object file. */
7777 set_linkage_for_static_data_member (tree decl
)
7779 /* A static data member always has static storage duration and
7780 external linkage. Note that static data members are forbidden in
7781 local classes -- the only situation in which a class has
7782 non-external linkage. */
7783 TREE_PUBLIC (decl
) = 1;
7784 TREE_STATIC (decl
) = 1;
7785 /* For non-template classes, static data members are always put
7786 out in exactly those files where they are defined, just as
7787 with ordinary namespace-scope variables. */
7788 if (!processing_template_decl
)
7789 DECL_INTERFACE_KNOWN (decl
) = 1;
7792 /* Create a VAR_DECL named NAME with the indicated TYPE.
7794 If SCOPE is non-NULL, it is the class type or namespace containing
7795 the variable. If SCOPE is NULL, the variable should is created in
7796 the innermost enclosings scope. */
7799 grokvardecl (tree type
,
7801 const cp_decl_specifier_seq
*declspecs
,
7807 tree explicit_scope
;
7809 gcc_assert (!name
|| identifier_p (name
));
7811 /* Compute the scope in which to place the variable, but remember
7812 whether or not that scope was explicitly specified by the user. */
7813 explicit_scope
= scope
;
7816 /* An explicit "extern" specifier indicates a namespace-scope
7818 if (declspecs
->storage_class
== sc_extern
)
7819 scope
= current_decl_namespace ();
7820 else if (!at_function_scope_p ())
7821 scope
= current_scope ();
7825 && (/* If the variable is a namespace-scope variable declared in a
7826 template, we need DECL_LANG_SPECIFIC. */
7827 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7828 /* Similarly for namespace-scope variables with language linkage
7830 || (TREE_CODE (scope
) == NAMESPACE_DECL
7831 && current_lang_name
!= lang_name_cplusplus
)
7832 /* Similarly for static data members. */
7834 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7836 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7838 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7839 set_decl_namespace (decl
, explicit_scope
, 0);
7841 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7843 if (declspecs
->storage_class
== sc_extern
)
7845 DECL_THIS_EXTERN (decl
) = 1;
7846 DECL_EXTERNAL (decl
) = !initialized
;
7849 if (DECL_CLASS_SCOPE_P (decl
))
7851 set_linkage_for_static_data_member (decl
);
7852 /* This function is only called with out-of-class definitions. */
7853 DECL_EXTERNAL (decl
) = 0;
7854 check_class_member_definition_namespace (decl
);
7856 /* At top level, either `static' or no s.c. makes a definition
7857 (perhaps tentative), and absence of `static' makes it public. */
7858 else if (toplevel_bindings_p ())
7860 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7861 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7862 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7864 /* Not at top level, only `static' makes a static definition. */
7867 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7868 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7871 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7873 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7874 if (declspecs
->gnu_thread_keyword_p
)
7875 DECL_GNU_TLS_P (decl
) = true;
7878 /* If the type of the decl has no linkage, make sure that we'll
7879 notice that in mark_used. */
7880 if (cxx_dialect
> cxx98
7881 && decl_linkage (decl
) != lk_none
7882 && DECL_LANG_SPECIFIC (decl
) == NULL
7883 && !DECL_EXTERN_C_P (decl
)
7884 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7885 retrofit_lang_decl (decl
);
7887 if (TREE_PUBLIC (decl
))
7889 /* [basic.link]: A name with no linkage (notably, the name of a class
7890 or enumeration declared in a local scope) shall not be used to
7891 declare an entity with linkage.
7893 DR 757 relaxes this restriction for C++0x. */
7894 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7895 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7898 if (TYPE_ANONYMOUS_P (t
))
7900 if (DECL_EXTERN_C_P (decl
))
7901 /* Allow this; it's pretty common in C. */
7905 /* DRs 132, 319 and 389 seem to indicate types with
7906 no linkage can only be used to declare extern "C"
7907 entities. Since it's not always an error in the
7908 ISO C++ 90 Standard, we only issue a warning. */
7909 warning (0, "anonymous type with no linkage used to declare "
7910 "variable %q#D with linkage", decl
);
7911 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7912 warning (0, "%q+#D does not refer to the unqualified "
7913 "type, so it is not used for linkage",
7918 warning (0, "type %qT with no linkage used to declare variable "
7919 "%q#D with linkage", t
, decl
);
7923 DECL_INTERFACE_KNOWN (decl
) = 1;
7928 /* Create and return a canonical pointer to member function type, for
7929 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7932 build_ptrmemfunc_type (tree type
)
7936 tree unqualified_variant
= NULL_TREE
;
7938 if (type
== error_mark_node
)
7941 /* If a canonical type already exists for this type, use it. We use
7942 this method instead of type_hash_canon, because it only does a
7943 simple equality check on the list of field members. */
7945 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7948 /* Make sure that we always have the unqualified pointer-to-member
7950 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7952 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7954 t
= make_class_type (RECORD_TYPE
);
7955 xref_basetypes (t
, NULL_TREE
);
7957 /* Let the front end know this is a pointer to member function... */
7958 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7959 /* ... and not really a class type. */
7960 SET_CLASS_TYPE_P (t
, 0);
7962 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7965 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7967 DECL_CHAIN (field
) = fields
;
7970 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7972 /* Zap out the name so that the back end will give us the debugging
7973 information for this anonymous RECORD_TYPE. */
7974 TYPE_NAME (t
) = NULL_TREE
;
7976 /* If this is not the unqualified form of this pointer-to-member
7977 type, set the TYPE_MAIN_VARIANT for this type to be the
7978 unqualified type. Since they are actually RECORD_TYPEs that are
7979 not variants of each other, we must do this manually.
7980 As we just built a new type there is no need to do yet another copy. */
7981 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7983 int type_quals
= cp_type_quals (type
);
7984 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7985 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7986 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7987 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7988 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7989 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7990 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7993 /* Cache this pointer-to-member type so that we can find it again
7995 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7997 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7998 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7999 else if (TYPE_CANONICAL (type
) != type
)
8000 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8005 /* Create and return a pointer to data member type. */
8008 build_ptrmem_type (tree class_type
, tree member_type
)
8010 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8012 cp_cv_quals quals
= type_memfn_quals (member_type
);
8013 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8014 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8015 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8019 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8020 return build_offset_type (class_type
, member_type
);
8024 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8025 Check to see that the definition is valid. Issue appropriate error
8026 messages. Return 1 if the definition is particularly bad, or 0
8030 check_static_variable_definition (tree decl
, tree type
)
8032 /* Can't check yet if we don't know the type. */
8033 if (dependent_type_p (type
))
8035 /* If DECL is declared constexpr, we'll do the appropriate checks
8036 in check_initializer. */
8037 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8039 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8041 if (!COMPLETE_TYPE_P (type
))
8042 error ("in-class initialization of static data member %q#D of "
8043 "incomplete type", decl
);
8044 else if (literal_type_p (type
))
8045 permerror (input_location
,
8046 "%<constexpr%> needed for in-class initialization of "
8047 "static data member %q#D of non-integral type", decl
);
8049 error ("in-class initialization of static data member %q#D of "
8050 "non-literal type", decl
);
8054 /* Motion 10 at San Diego: If a static const integral data member is
8055 initialized with an integral constant expression, the initializer
8056 may appear either in the declaration (within the class), or in
8057 the definition, but not both. If it appears in the class, the
8058 member is a member constant. The file-scope definition is always
8060 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8062 error ("invalid in-class initialization of static data member "
8063 "of non-integral type %qT",
8067 else if (!CP_TYPE_CONST_P (type
))
8068 error ("ISO C++ forbids in-class initialization of non-const "
8069 "static member %qD",
8071 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8072 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8073 "%qD of non-integral type %qT", decl
, type
);
8078 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8079 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8080 expressions out into temporary variables so that walk_tree doesn't
8081 step into them (c++/15764). */
8084 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8086 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8087 tree expr
= *expr_p
;
8088 if (TREE_CODE (expr
) == SAVE_EXPR
)
8090 tree op
= TREE_OPERAND (expr
, 0);
8091 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8092 if (TREE_SIDE_EFFECTS (op
))
8093 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8096 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8101 /* Entry point for the above. */
8104 stabilize_vla_size (tree size
)
8106 struct pointer_set_t
*pset
= pointer_set_create ();
8107 /* Break out any function calls into temporary variables. */
8108 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8109 pointer_set_destroy (pset
);
8112 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8113 not inside of SAVE_EXPR and fold them. */
8116 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8118 tree expr
= *expr_p
;
8119 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8121 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8123 *(bool *)data
= true;
8124 if (SIZEOF_EXPR_TYPE_P (expr
))
8125 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8126 SIZEOF_EXPR
, false);
8127 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8128 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8131 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8133 if (expr
== error_mark_node
)
8134 expr
= size_one_node
;
8141 /* Given the SIZE (i.e., number of elements) in an array, compute an
8142 appropriate index type for the array. If non-NULL, NAME is the
8143 name of the thing being declared. */
8146 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8150 tree abi_1_itype
= NULL_TREE
;
8152 if (error_operand_p (size
))
8153 return error_mark_node
;
8155 if (!type_dependent_expression_p (size
))
8157 tree type
= TREE_TYPE (size
);
8159 mark_rvalue_use (size
);
8161 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8162 && TREE_SIDE_EFFECTS (size
))
8163 /* In C++98, we mark a non-constant array bound with a magic
8164 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8167 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8169 if (CLASS_TYPE_P (type
)
8170 && CLASSTYPE_LITERAL_P (type
))
8172 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8175 if (!(complain
& tf_error
))
8176 return error_mark_node
;
8178 error ("size of array %qD has non-integral type %qT",
8181 error ("size of array has non-integral type %qT", type
);
8182 size
= integer_one_node
;
8184 if (size
== error_mark_node
)
8185 return error_mark_node
;
8186 type
= TREE_TYPE (size
);
8187 /* We didn't support this case in GCC 3.2, so don't bother
8188 trying to model it now in ABI v1. */
8189 abi_1_itype
= error_mark_node
;
8192 size
= maybe_constant_value (size
);
8193 if (!TREE_CONSTANT (size
))
8197 if (error_operand_p (size
))
8198 return error_mark_node
;
8200 /* The array bound must be an integer type. */
8201 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8203 if (!(complain
& tf_error
))
8204 return error_mark_node
;
8206 error ("size of array %qD has non-integral type %qT", name
, type
);
8208 error ("size of array has non-integral type %qT", type
);
8209 size
= integer_one_node
;
8210 type
= TREE_TYPE (size
);
8214 /* A type is dependent if it is...an array type constructed from any
8215 dependent type or whose size is specified by a constant expression
8216 that is value-dependent. */
8217 /* We can only call value_dependent_expression_p on integral constant
8218 expressions; treat non-constant expressions as dependent, too. */
8219 if (processing_template_decl
8220 && (type_dependent_expression_p (size
)
8221 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8223 /* We cannot do any checking for a SIZE that isn't known to be
8224 constant. Just build the index type and mark that it requires
8225 structural equality checks. */
8226 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8227 size
, size_one_node
));
8228 TYPE_DEPENDENT_P (itype
) = 1;
8229 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8230 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8234 if (!abi_version_at_least (2) && processing_template_decl
8235 && abi_1_itype
== NULL_TREE
)
8236 /* For abi-1, we handled all instances in templates the same way,
8237 even when they were non-dependent. This affects the manglings
8238 produced. So, we do the normal checking for non-dependent
8239 sizes, but at the end we'll return the same type that abi-1
8240 would have, but with TYPE_CANONICAL set to the "right"
8241 value that the current ABI would provide. */
8242 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8243 osize
, integer_one_node
));
8245 /* Normally, the array-bound will be a constant. */
8246 if (TREE_CODE (size
) == INTEGER_CST
)
8248 /* Check to see if the array bound overflowed. Make that an
8249 error, no matter how generous we're being. */
8250 constant_expression_error (size
);
8252 /* An array must have a positive number of elements. */
8253 if (INT_CST_LT (size
, integer_zero_node
))
8255 if (!(complain
& tf_error
))
8256 return error_mark_node
;
8258 error ("size of array %qD is negative", name
);
8260 error ("size of array is negative");
8261 size
= integer_one_node
;
8263 /* As an extension we allow zero-sized arrays. */
8264 else if (integer_zerop (size
))
8266 if (!(complain
& tf_error
))
8267 /* We must fail if performing argument deduction (as
8268 indicated by the state of complain), so that
8269 another substitution can be found. */
8270 return error_mark_node
;
8271 else if (in_system_header
)
8272 /* Allow them in system headers because glibc uses them. */;
8274 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8276 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8279 else if (TREE_CONSTANT (size
)
8280 /* We don't allow VLAs at non-function scopes, or during
8281 tentative template substitution. */
8282 || !at_function_scope_p ()
8283 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8285 if (!(complain
& tf_error
))
8286 return error_mark_node
;
8287 /* `(int) &fn' is not a valid array bound. */
8289 error ("size of array %qD is not an integral constant-expression",
8292 error ("size of array is not an integral constant-expression");
8293 size
= integer_one_node
;
8295 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8298 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8300 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8302 else if (warn_vla
> 0)
8306 "variable length array %qD is used", name
);
8309 "variable length array is used");
8312 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8313 /* A variable sized array. */
8314 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8317 HOST_WIDE_INT saved_processing_template_decl
;
8319 /* Compute the index of the largest element in the array. It is
8320 one less than the number of elements in the array. We save
8321 and restore PROCESSING_TEMPLATE_DECL so that computations in
8322 cp_build_binary_op will be appropriately folded. */
8323 saved_processing_template_decl
= processing_template_decl
;
8324 processing_template_decl
= 0;
8325 itype
= cp_build_binary_op (input_location
,
8327 cp_convert (ssizetype
, size
, complain
),
8328 cp_convert (ssizetype
, integer_one_node
,
8331 itype
= fold (itype
);
8332 processing_template_decl
= saved_processing_template_decl
;
8334 if (!TREE_CONSTANT (itype
))
8336 /* A variable sized array. */
8337 itype
= variable_size (itype
);
8338 if (TREE_CODE (itype
) != SAVE_EXPR
)
8340 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8341 they might survive till gimplification. */
8342 tree newitype
= itype
;
8344 cp_walk_tree_without_duplicates (&newitype
,
8345 fold_sizeof_expr_r
, &found
);
8347 itype
= variable_size (fold (newitype
));
8350 /* Make sure that there was no overflow when creating to a signed
8351 index type. (For example, on a 32-bit machine, an array with
8352 size 2^32 - 1 is too big.) */
8353 else if (TREE_CODE (itype
) == INTEGER_CST
8354 && TREE_OVERFLOW (itype
))
8356 if (!(complain
& tf_error
))
8357 return error_mark_node
;
8358 error ("overflow in array dimension");
8359 TREE_OVERFLOW (itype
) = 0;
8363 /* Create and return the appropriate index type. */
8364 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8366 tree t
= build_index_type (itype
);
8367 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8368 itype
= abi_1_itype
;
8371 itype
= build_index_type (itype
);
8373 /* If the index type were dependent, we would have returned early, so
8374 remember that it isn't. */
8375 TYPE_DEPENDENT_P (itype
) = 0;
8376 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8380 /* Returns the scope (if any) in which the entity declared by
8381 DECLARATOR will be located. If the entity was declared with an
8382 unqualified name, NULL_TREE is returned. */
8385 get_scope_of_declarator (const cp_declarator
*declarator
)
8387 while (declarator
&& declarator
->kind
!= cdk_id
)
8388 declarator
= declarator
->declarator
;
8390 /* If the declarator-id is a SCOPE_REF, the scope in which the
8391 declaration occurs is the first operand. */
8393 && declarator
->u
.id
.qualifying_scope
)
8394 return declarator
->u
.id
.qualifying_scope
;
8396 /* Otherwise, the declarator is not a qualified name; the entity will
8397 be declared in the current scope. */
8401 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8402 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8406 create_array_type_for_decl (tree name
, tree type
, tree size
)
8408 tree itype
= NULL_TREE
;
8410 /* If things have already gone awry, bail now. */
8411 if (type
== error_mark_node
|| size
== error_mark_node
)
8412 return error_mark_node
;
8414 /* 8.3.4/1: If the type of the identifier of D contains the auto
8415 type-specifier, the program is ill-formed. */
8416 if (pedantic
&& type_uses_auto (type
))
8417 pedwarn (input_location
, OPT_Wpedantic
,
8418 "declaration of %qD as array of %<auto%>", name
);
8420 /* If there are some types which cannot be array elements,
8421 issue an error-message and return. */
8422 switch (TREE_CODE (type
))
8426 error ("declaration of %qD as array of void", name
);
8428 error ("creating array of void");
8429 return error_mark_node
;
8433 error ("declaration of %qD as array of functions", name
);
8435 error ("creating array of functions");
8436 return error_mark_node
;
8438 case REFERENCE_TYPE
:
8440 error ("declaration of %qD as array of references", name
);
8442 error ("creating array of references");
8443 return error_mark_node
;
8447 error ("declaration of %qD as array of function members", name
);
8449 error ("creating array of function members");
8450 return error_mark_node
;
8458 The constant expressions that specify the bounds of the arrays
8459 can be omitted only for the first member of the sequence. */
8460 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8463 error ("declaration of %qD as multidimensional array must "
8464 "have bounds for all dimensions except the first",
8467 error ("multidimensional array must have bounds for all "
8468 "dimensions except the first");
8470 return error_mark_node
;
8473 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
8474 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8476 /* Figure out the index type for the array. */
8478 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8481 T is called the array element type; this type shall not be [...] an
8482 abstract class type. */
8483 abstract_virtuals_error (name
, type
);
8485 return build_cplus_array_type (type
, itype
);
8488 /* Check that it's OK to declare a function with the indicated TYPE.
8489 SFK indicates the kind of special function (if any) that this
8490 function is. OPTYPE is the type given in a conversion operator
8491 declaration, or the class type for a constructor/destructor.
8492 Returns the actual return type of the function; that
8493 may be different than TYPE if an error occurs, or for certain
8494 special functions. */
8497 check_special_function_return_type (special_function_kind sfk
,
8503 case sfk_constructor
:
8505 error ("return type specification for constructor invalid");
8507 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8508 type
= build_pointer_type (optype
);
8510 type
= void_type_node
;
8513 case sfk_destructor
:
8515 error ("return type specification for destructor invalid");
8516 /* We can't use the proper return type here because we run into
8517 problems with ambiguous bases and covariant returns.
8518 Java classes are left unchanged because (void *) isn't a valid
8519 Java type, and we don't want to change the Java ABI. */
8520 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8521 type
= build_pointer_type (void_type_node
);
8523 type
= void_type_node
;
8526 case sfk_conversion
:
8528 error ("return type specified for %<operator %T%>", optype
);
8539 /* A variable or data member (whose unqualified name is IDENTIFIER)
8540 has been declared with the indicated TYPE. If the TYPE is not
8541 acceptable, issue an error message and return a type to use for
8542 error-recovery purposes. */
8545 check_var_type (tree identifier
, tree type
)
8547 if (VOID_TYPE_P (type
))
8550 error ("unnamed variable or field declared void");
8551 else if (identifier_p (identifier
))
8553 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8554 error ("variable or field %qE declared void", identifier
);
8557 error ("variable or field declared void");
8558 type
= error_mark_node
;
8564 /* Functions for adjusting the visibility of a tagged type and its nested
8565 types when it gets a name for linkage purposes from a typedef. */
8567 static void bt_reset_linkage (binding_entry
, void *);
8569 reset_type_linkage (tree type
)
8571 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8572 if (CLASS_TYPE_P (type
))
8573 binding_table_foreach (CLASSTYPE_NESTED_UTDS (type
), bt_reset_linkage
, NULL
);
8576 bt_reset_linkage (binding_entry b
, void */
*data*/
)
8578 reset_type_linkage (b
->type
);
8581 /* Given declspecs and a declarator (abstract or otherwise), determine
8582 the name and type of the object declared and construct a DECL node
8585 DECLSPECS points to the representation of declaration-specifier
8586 sequence that precedes declarator.
8588 DECL_CONTEXT says which syntactic context this declaration is in:
8589 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8590 FUNCDEF for a function definition. Like NORMAL but a few different
8591 error messages in each case. Return value may be zero meaning
8592 this definition is too screwy to try to parse.
8593 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8594 handle member functions (which have FIELD context).
8595 Return value may be zero meaning this definition is too screwy to
8597 PARM for a parameter declaration (either within a function prototype
8598 or before a function body). Make a PARM_DECL, or return void_type_node.
8599 TPARM for a template parameter declaration.
8600 CATCHPARM for a parameter declaration before a catch clause.
8601 TYPENAME if for a typename (in a cast or sizeof).
8602 Don't make a DECL node; just return the ..._TYPE node.
8603 FIELD for a struct or union field; make a FIELD_DECL.
8604 BITFIELD for a field with specified width.
8606 INITIALIZED is as for start_decl.
8608 ATTRLIST is a pointer to the list of attributes, which may be NULL
8609 if there are none; *ATTRLIST may be modified if attributes from inside
8610 the declarator should be applied to the declaration.
8612 When this function is called, scoping variables (such as
8613 CURRENT_CLASS_TYPE) should reflect the scope in which the
8614 declaration occurs, not the scope in which the new declaration will
8615 be placed. For example, on:
8619 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8622 Returns a DECL (if a declarator is present), a TYPE (if there is no
8623 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8627 grokdeclarator (const cp_declarator
*declarator
,
8628 cp_decl_specifier_seq
*declspecs
,
8629 enum decl_context decl_context
,
8633 tree type
= NULL_TREE
;
8635 int explicit_int128
= 0;
8636 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8637 int explicit_int
= 0;
8638 int explicit_char
= 0;
8639 int defaulted_int
= 0;
8641 tree typedef_decl
= NULL_TREE
;
8642 const char *name
= NULL
;
8643 tree typedef_type
= NULL_TREE
;
8644 /* True if this declarator is a function definition. */
8645 bool funcdef_flag
= false;
8646 cp_declarator_kind innermost_code
= cdk_error
;
8649 /* See the code below that used this. */
8650 tree decl_attr
= NULL_TREE
;
8653 /* Keep track of what sort of function is being processed
8654 so that we can warn about default return values, or explicit
8655 return values which do not match prescribed defaults. */
8656 special_function_kind sfk
= sfk_none
;
8658 tree dname
= NULL_TREE
;
8659 tree ctor_return_type
= NULL_TREE
;
8660 enum overload_flags flags
= NO_SPECIAL
;
8661 /* cv-qualifiers that apply to the declarator, for a declaration of
8662 a member function. */
8663 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8664 /* virt-specifiers that apply to the declarator, for a declaration of
8665 a member function. */
8666 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8667 /* ref-qualifier that applies to the declarator, for a declaration of
8668 a member function. */
8669 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8670 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8672 tree raises
= NULL_TREE
;
8673 int template_count
= 0;
8674 tree returned_attrs
= NULL_TREE
;
8675 tree parms
= NULL_TREE
;
8676 const cp_declarator
*id_declarator
;
8677 /* The unqualified name of the declarator; either an
8678 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8679 tree unqualified_id
;
8680 /* The class type, if any, in which this entity is located,
8681 or NULL_TREE if none. Note that this value may be different from
8682 the current class type; for example if an attempt is made to declare
8683 "A::f" inside "B", this value will be "A". */
8684 tree ctype
= current_class_type
;
8685 /* The NAMESPACE_DECL for the namespace in which this entity is
8686 located. If an unqualified name is used to declare the entity,
8687 this value will be NULL_TREE, even if the entity is located at
8689 tree in_namespace
= NULL_TREE
;
8690 cp_storage_class storage_class
;
8691 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8692 bool type_was_error_mark_node
= false;
8693 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8694 bool template_type_arg
= false;
8695 bool template_parm_flag
= false;
8696 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8697 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8698 source_location saved_loc
= input_location
;
8701 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8702 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8703 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8704 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8705 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8706 explicit_int128
= declspecs
->explicit_int128_p
;
8707 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8709 if (decl_context
== FUNCDEF
)
8710 funcdef_flag
= true, decl_context
= NORMAL
;
8711 else if (decl_context
== MEMFUNCDEF
)
8712 funcdef_flag
= true, decl_context
= FIELD
;
8713 else if (decl_context
== BITFIELD
)
8714 bitfield
= 1, decl_context
= FIELD
;
8715 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8716 template_type_arg
= true, decl_context
= TYPENAME
;
8717 else if (decl_context
== TPARM
)
8718 template_parm_flag
= true, decl_context
= PARM
;
8720 if (initialized
> 1)
8721 funcdef_flag
= true;
8723 /* Look inside a declarator for the name being declared
8724 and get it as a string, for an error message. */
8725 for (id_declarator
= declarator
;
8727 id_declarator
= id_declarator
->declarator
)
8729 if (id_declarator
->kind
!= cdk_id
)
8730 innermost_code
= id_declarator
->kind
;
8732 switch (id_declarator
->kind
)
8735 if (id_declarator
->declarator
8736 && id_declarator
->declarator
->kind
== cdk_id
)
8738 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8739 if (sfk
== sfk_destructor
)
8746 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8747 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8750 if (qualifying_scope
)
8752 if (at_function_scope_p ())
8756 A declarator-id shall not be qualified except
8759 None of the cases are permitted in block
8761 if (qualifying_scope
== global_namespace
)
8762 error ("invalid use of qualified-name %<::%D%>",
8764 else if (TYPE_P (qualifying_scope
))
8765 error ("invalid use of qualified-name %<%T::%D%>",
8766 qualifying_scope
, decl
);
8768 error ("invalid use of qualified-name %<%D::%D%>",
8769 qualifying_scope
, decl
);
8770 return error_mark_node
;
8772 else if (TYPE_P (qualifying_scope
))
8774 ctype
= qualifying_scope
;
8775 if (!MAYBE_CLASS_TYPE_P (ctype
))
8777 error ("%q#T is not a class or a namespace", ctype
);
8780 else if (innermost_code
!= cdk_function
8781 && current_class_type
8782 && !uniquely_derived_from_p (ctype
,
8783 current_class_type
))
8785 error ("type %qT is not derived from type %qT",
8786 ctype
, current_class_type
);
8787 return error_mark_node
;
8790 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8791 in_namespace
= qualifying_scope
;
8793 switch (TREE_CODE (decl
))
8799 if (innermost_code
!= cdk_function
)
8801 error ("declaration of %qD as non-function", decl
);
8802 return error_mark_node
;
8804 else if (!qualifying_scope
8805 && !(current_class_type
&& at_class_scope_p ()))
8807 error ("declaration of %qD as non-member", decl
);
8808 return error_mark_node
;
8811 type
= TREE_OPERAND (decl
, 0);
8813 type
= constructor_name (type
);
8814 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8819 case TEMPLATE_ID_EXPR
:
8821 tree fns
= TREE_OPERAND (decl
, 0);
8824 if (!identifier_p (dname
))
8826 gcc_assert (is_overloaded_fn (dname
));
8827 dname
= DECL_NAME (get_first_fn (dname
));
8832 case IDENTIFIER_NODE
:
8833 if (identifier_p (decl
))
8836 if (C_IS_RESERVED_WORD (dname
))
8838 error ("declarator-id missing; using reserved word %qD",
8840 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8842 else if (!IDENTIFIER_TYPENAME_P (dname
))
8843 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8846 gcc_assert (flags
== NO_SPECIAL
);
8847 flags
= TYPENAME_FLAG
;
8848 ctor_return_type
= TREE_TYPE (dname
);
8849 sfk
= sfk_conversion
;
8850 if (is_typename_at_global_scope (dname
))
8851 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8853 name
= "<invalid operator>";
8870 return error_mark_node
;
8875 if (id_declarator
->kind
== cdk_id
)
8881 The declarator in a function-definition shall have the form
8882 D1 ( parameter-declaration-clause) ... */
8883 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8885 error ("function definition does not declare parameters");
8886 return error_mark_node
;
8889 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8890 && innermost_code
!= cdk_function
8891 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8893 error ("declaration of %qD as non-function", dname
);
8894 return error_mark_node
;
8898 && identifier_p (dname
)
8899 && UDLIT_OPER_P (dname
)
8900 && innermost_code
!= cdk_function
)
8902 error ("declaration of %qD as non-function", dname
);
8903 return error_mark_node
;
8906 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8910 error ("declaration of %qD as %<typedef%>", dname
);
8911 return error_mark_node
;
8913 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8915 error ("declaration of %qD as parameter", dname
);
8916 return error_mark_node
;
8920 /* Anything declared one level down from the top level
8921 must be one of the parameters of a function
8922 (because the body is at least two levels down). */
8924 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8925 by not allowing C++ class definitions to specify their parameters
8926 with xdecls (must be spec.d in the parmlist).
8928 Since we now wait to push a class scope until we are sure that
8929 we are in a legitimate method context, we must set oldcname
8930 explicitly (since current_class_name is not yet alive).
8932 We also want to avoid calling this a PARM if it is in a namespace. */
8934 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8936 cp_binding_level
*b
= current_binding_level
;
8937 current_binding_level
= b
->level_chain
;
8938 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8939 decl_context
= PARM
;
8940 current_binding_level
= b
;
8944 name
= decl_context
== PARM
? "parameter" : "type name";
8946 if (constexpr_p
&& typedef_p
)
8948 error ("%<constexpr%> cannot appear in a typedef declaration");
8949 return error_mark_node
;
8952 /* If there were multiple types specified in the decl-specifier-seq,
8953 issue an error message. */
8954 if (declspecs
->multiple_types_p
)
8956 error ("two or more data types in declaration of %qs", name
);
8957 return error_mark_node
;
8960 if (declspecs
->conflicting_specifiers_p
)
8962 error ("conflicting specifiers in declaration of %qs", name
);
8963 return error_mark_node
;
8966 /* Extract the basic type from the decl-specifier-seq. */
8967 type
= declspecs
->type
;
8968 if (type
== error_mark_node
)
8971 type_was_error_mark_node
= true;
8973 /* If the entire declaration is itself tagged as deprecated then
8974 suppress reports of deprecated items. */
8975 if (type
&& TREE_DEPRECATED (type
)
8976 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8977 warn_deprecated_use (type
, NULL_TREE
);
8978 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8980 typedef_decl
= type
;
8981 type
= TREE_TYPE (typedef_decl
);
8982 if (TREE_DEPRECATED (type
)
8983 && DECL_ARTIFICIAL (typedef_decl
)
8984 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8985 warn_deprecated_use (type
, NULL_TREE
);
8987 /* No type at all: default to `int', and set DEFAULTED_INT
8988 because it was not a user-defined typedef. */
8989 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8991 /* These imply 'int'. */
8992 type
= integer_type_node
;
8996 explicit_int
= declspecs
->explicit_int_p
;
8997 explicit_char
= declspecs
->explicit_char_p
;
9000 /* See the code below that used this. */
9002 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9004 typedef_type
= type
;
9007 if (sfk
!= sfk_conversion
)
9008 ctor_return_type
= ctype
;
9010 if (sfk
!= sfk_none
)
9011 type
= check_special_function_return_type (sfk
, type
,
9013 else if (type
== NULL_TREE
)
9019 /* We handle `main' specially here, because 'main () { }' is so
9020 common. With no options, it is allowed. With -Wreturn-type,
9021 it is a warning. It is only an error with -pedantic-errors. */
9022 is_main
= (funcdef_flag
9023 && dname
&& identifier_p (dname
)
9024 && MAIN_NAME_P (dname
)
9025 && ctype
== NULL_TREE
9026 && in_namespace
== NULL_TREE
9027 && current_namespace
== global_namespace
);
9029 if (type_was_error_mark_node
)
9030 /* We've already issued an error, don't complain more. */;
9031 else if (in_system_header
|| flag_ms_extensions
)
9032 /* Allow it, sigh. */;
9034 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9036 pedwarn (input_location
, OPT_Wpedantic
,
9037 "ISO C++ forbids declaration of %qs with no type", name
);
9039 warning (OPT_Wreturn_type
,
9040 "ISO C++ forbids declaration of %qs with no type", name
);
9042 type
= integer_type_node
;
9047 if (explicit_int128
)
9049 if (int128_integer_type_node
== NULL_TREE
)
9051 error ("%<__int128%> is not supported by this target");
9052 explicit_int128
= false;
9054 else if (pedantic
&& ! in_system_header
)
9055 pedwarn (input_location
, OPT_Wpedantic
,
9056 "ISO C++ does not support %<__int128%> for %qs", name
);
9059 /* Now process the modifiers that were specified
9060 and check for invalid combinations. */
9062 /* Long double is a special combination. */
9063 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9066 type
= cp_build_qualified_type (long_double_type_node
,
9067 cp_type_quals (type
));
9070 /* Check all other uses of type modifiers. */
9072 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9076 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9077 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9078 else if (signed_p
&& unsigned_p
)
9079 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9080 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9081 error ("%<long long%> invalid for %qs", name
);
9082 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9083 error ("%<long%> invalid for %qs", name
);
9084 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9085 error ("%<short%> invalid for %qs", name
);
9086 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9087 error ("%<long%> or %<short%> invalid for %qs", name
);
9088 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9089 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9090 else if ((long_p
|| short_p
) && explicit_char
)
9091 error ("%<long%> or %<short%> specified with char for %qs", name
);
9092 else if (long_p
&& short_p
)
9093 error ("%<long%> and %<short%> specified together for %qs", name
);
9094 else if (type
== char16_type_node
|| type
== char32_type_node
)
9096 if (signed_p
|| unsigned_p
)
9097 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9098 else if (short_p
|| long_p
)
9099 error ("%<short%> or %<long%> invalid for %qs", name
);
9104 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9106 pedwarn (input_location
, OPT_Wpedantic
,
9107 "long, short, signed or unsigned used invalidly for %qs",
9109 if (flag_pedantic_errors
)
9114 /* Discard the type modifiers if they are invalid. */
9125 /* Decide whether an integer type is signed or not.
9126 Optionally treat bitfields as signed by default. */
9130 It is implementation-defined whether a plain (neither
9131 explicitly signed or unsigned) char, short, int, or long
9132 bit-field is signed or unsigned.
9134 Naturally, we extend this to long long as well. Note that
9135 this does not include wchar_t. */
9136 || (bitfield
&& !flag_signed_bitfields
9138 /* A typedef for plain `int' without `signed' can be
9139 controlled just like plain `int', but a typedef for
9140 `signed int' cannot be so controlled. */
9142 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9143 && TREE_CODE (type
) == INTEGER_TYPE
9144 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9146 if (explicit_int128
)
9147 type
= int128_unsigned_type_node
;
9149 type
= long_long_unsigned_type_node
;
9151 type
= long_unsigned_type_node
;
9153 type
= short_unsigned_type_node
;
9154 else if (type
== char_type_node
)
9155 type
= unsigned_char_type_node
;
9156 else if (typedef_decl
)
9157 type
= unsigned_type_for (type
);
9159 type
= unsigned_type_node
;
9161 else if (signed_p
&& type
== char_type_node
)
9162 type
= signed_char_type_node
;
9163 else if (explicit_int128
)
9164 type
= int128_integer_type_node
;
9166 type
= long_long_integer_type_node
;
9168 type
= long_integer_type_node
;
9170 type
= short_integer_type_node
;
9172 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9174 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9175 error ("complex invalid for %qs", name
);
9176 /* If we just have "complex", it is equivalent to
9177 "complex double", but if any modifiers at all are specified it is
9178 the complex form of TYPE. E.g, "complex short" is
9179 "complex short int". */
9180 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9181 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9182 type
= complex_double_type_node
;
9183 else if (type
== integer_type_node
)
9184 type
= complex_integer_type_node
;
9185 else if (type
== float_type_node
)
9186 type
= complex_float_type_node
;
9187 else if (type
== double_type_node
)
9188 type
= complex_double_type_node
;
9189 else if (type
== long_double_type_node
)
9190 type
= complex_long_double_type_node
;
9192 type
= build_complex_type (type
);
9195 type_quals
= TYPE_UNQUALIFIED
;
9196 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9197 type_quals
|= TYPE_QUAL_CONST
;
9198 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9199 type_quals
|= TYPE_QUAL_VOLATILE
;
9200 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9201 type_quals
|= TYPE_QUAL_RESTRICT
;
9202 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9203 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9206 /* If we're using the injected-class-name to form a compound type or a
9207 declaration, replace it with the underlying class so we don't get
9208 redundant typedefs in the debug output. But if we are returning the
9209 type unchanged, leave it alone so that it's available to
9210 maybe_get_template_decl_from_type_decl. */
9211 if (CLASS_TYPE_P (type
)
9212 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9213 && type
== TREE_TYPE (TYPE_NAME (type
))
9214 && (declarator
|| type_quals
))
9215 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9217 type_quals
|= cp_type_quals (type
);
9218 type
= cp_build_qualified_type_real
9219 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9220 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9221 /* We might have ignored or rejected some of the qualifiers. */
9222 type_quals
= cp_type_quals (type
);
9225 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9226 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9227 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9229 storage_class
= declspecs
->storage_class
;
9230 if (storage_class
== sc_static
)
9231 staticp
= 1 + (decl_context
== FIELD
);
9233 if (virtualp
&& staticp
== 2)
9235 error ("member %qD cannot be declared both virtual and static", dname
);
9236 storage_class
= sc_none
;
9239 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9241 /* Issue errors about use of storage classes for parameters. */
9242 if (decl_context
== PARM
)
9246 error ("typedef declaration invalid in parameter declaration");
9247 return error_mark_node
;
9249 else if (template_parm_flag
&& storage_class
!= sc_none
)
9251 error ("storage class specified for template parameter %qs", name
);
9252 return error_mark_node
;
9254 else if (storage_class
== sc_static
9255 || storage_class
== sc_extern
9257 error ("storage class specifiers invalid in parameter declarations");
9259 /* Function parameters cannot be constexpr. If we saw one, moan
9260 and pretend it wasn't there. */
9263 error ("a parameter cannot be declared %<constexpr%>");
9268 /* Give error if `virtual' is used outside of class declaration. */
9270 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9272 error ("%<virtual%> outside class declaration");
9276 /* Static anonymous unions are dealt with here. */
9277 if (staticp
&& decl_context
== TYPENAME
9279 && ANON_AGGR_TYPE_P (declspecs
->type
))
9280 decl_context
= FIELD
;
9282 /* Warn about storage classes that are invalid for certain
9283 kinds of declarations (parameters, typenames, etc.). */
9286 && storage_class
!= sc_extern
9287 && storage_class
!= sc_static
)
9290 error ("multiple storage classes in declaration of %qs", name
);
9293 if (decl_context
!= NORMAL
9294 && ((storage_class
!= sc_none
9295 && storage_class
!= sc_mutable
)
9298 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9299 && (storage_class
== sc_register
9300 || storage_class
== sc_auto
))
9304 else if (decl_context
== FIELD
9305 /* C++ allows static class elements. */
9306 && storage_class
== sc_static
)
9307 /* C++ also allows inlines and signed and unsigned elements,
9308 but in those cases we don't come in here. */
9312 if (decl_context
== FIELD
)
9313 error ("storage class specified for %qs", name
);
9316 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9317 error ("storage class specified for parameter %qs", name
);
9319 error ("storage class specified for typename");
9321 if (storage_class
== sc_register
9322 || storage_class
== sc_auto
9323 || storage_class
== sc_extern
9325 storage_class
= sc_none
;
9328 else if (storage_class
== sc_extern
&& funcdef_flag
9329 && ! toplevel_bindings_p ())
9330 error ("nested function %qs declared %<extern%>", name
);
9331 else if (toplevel_bindings_p ())
9333 if (storage_class
== sc_auto
)
9334 error ("top-level declaration of %qs specifies %<auto%>", name
);
9337 && storage_class
!= sc_extern
9338 && storage_class
!= sc_static
)
9340 if (declspecs
->gnu_thread_keyword_p
)
9341 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9342 "declared %<__thread%>", name
);
9344 /* When thread_local is applied to a variable of block scope the
9345 storage-class-specifier static is implied if it does not appear
9347 storage_class
= declspecs
->storage_class
= sc_static
;
9351 if (storage_class
&& friendp
)
9353 error ("storage class specifiers invalid in friend function declarations");
9354 storage_class
= sc_none
;
9359 unqualified_id
= NULL_TREE
;
9362 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9363 switch (TREE_CODE (unqualified_id
))
9366 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9367 if (TYPE_P (unqualified_id
))
9368 unqualified_id
= constructor_name (unqualified_id
);
9371 case IDENTIFIER_NODE
:
9372 case TEMPLATE_ID_EXPR
:
9380 if (declspecs
->std_attributes
)
9382 /* Apply the c++11 attributes to the type preceding them. */
9383 input_location
= declspecs
->locations
[ds_std_attribute
];
9384 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9385 input_location
= saved_loc
;
9388 /* Determine the type of the entity declared by recurring on the
9390 for (; declarator
; declarator
= declarator
->declarator
)
9392 const cp_declarator
*inner_declarator
;
9395 if (type
== error_mark_node
)
9396 return error_mark_node
;
9398 attrs
= declarator
->attributes
;
9404 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9405 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9406 if (declarator
->kind
== cdk_function
)
9407 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9408 if (declarator
->kind
== cdk_array
)
9409 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9410 returned_attrs
= decl_attributes (&type
,
9411 chainon (returned_attrs
, attrs
),
9415 if (declarator
->kind
== cdk_id
)
9418 inner_declarator
= declarator
->declarator
;
9420 switch (declarator
->kind
)
9423 type
= create_array_type_for_decl (dname
, type
,
9424 declarator
->u
.array
.bounds
);
9425 if (declarator
->std_attributes
)
9428 The optional attribute-specifier-seq appertains to the
9430 returned_attrs
= chainon (returned_attrs
,
9431 declarator
->std_attributes
);
9439 /* Declaring a function type.
9440 Make sure we have a valid type for the function to return. */
9442 if (type_quals
!= TYPE_UNQUALIFIED
)
9444 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9445 warning (OPT_Wignored_qualifiers
,
9446 "type qualifiers ignored on function return type");
9447 /* We now know that the TYPE_QUALS don't apply to the
9448 decl, but to its return type. */
9449 type_quals
= TYPE_UNQUALIFIED
;
9451 errmsg
= targetm
.invalid_return_type (type
);
9455 type
= integer_type_node
;
9458 /* Error about some types functions can't return. */
9460 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9462 error ("%qs declared as function returning a function", name
);
9463 return error_mark_node
;
9465 if (TREE_CODE (type
) == ARRAY_TYPE
)
9467 error ("%qs declared as function returning an array", name
);
9468 return error_mark_node
;
9471 input_location
= declspecs
->locations
[ds_type_spec
];
9472 abstract_virtuals_error (ACU_RETURN
, type
);
9473 input_location
= saved_loc
;
9475 /* Pick up type qualifiers which should be applied to `this'. */
9476 memfn_quals
= declarator
->u
.function
.qualifiers
;
9477 /* Pick up virt-specifiers. */
9478 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9479 /* And ref-qualifier, too */
9480 rqual
= declarator
->u
.function
.ref_qualifier
;
9481 /* Pick up the exception specifications. */
9482 raises
= declarator
->u
.function
.exception_specification
;
9483 /* If the exception-specification is ill-formed, let's pretend
9484 there wasn't one. */
9485 if (raises
== error_mark_node
)
9488 /* Say it's a definition only for the CALL_EXPR
9489 closest to the identifier. */
9490 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9492 /* Handle a late-specified return type. */
9495 if (type_uses_auto (type
))
9497 if (!declarator
->u
.function
.late_return_type
)
9499 if (current_class_type
9500 && LAMBDA_TYPE_P (current_class_type
))
9501 /* OK for C++11 lambdas. */;
9502 else if (cxx_dialect
< cxx1y
)
9503 pedwarn (input_location
, 0, "%qs function uses "
9504 "%<auto%> type specifier without trailing "
9505 "return type", name
);
9507 permerror (input_location
, "virtual function cannot "
9508 "have deduced return type");
9510 else if (!is_auto (type
))
9512 error ("%qs function with trailing return type has"
9513 " %qT as its type rather than plain %<auto%>",
9515 return error_mark_node
;
9518 else if (declarator
->u
.function
.late_return_type
)
9520 if (cxx_dialect
< cxx11
)
9521 /* Not using maybe_warn_cpp0x because this should
9522 always be an error. */
9523 error ("trailing return type only available with "
9524 "-std=c++11 or -std=gnu++11");
9526 error ("%qs function with trailing return type not "
9527 "declared with %<auto%> type specifier", name
);
9528 return error_mark_node
;
9531 type
= splice_late_return_type
9532 (type
, declarator
->u
.function
.late_return_type
);
9533 if (type
== error_mark_node
)
9534 return error_mark_node
;
9536 if (ctype
== NULL_TREE
9537 && decl_context
== FIELD
9539 && (friendp
== 0 || dname
== current_class_name
))
9540 ctype
= current_class_type
;
9542 if (ctype
&& (sfk
== sfk_constructor
9543 || sfk
== sfk_destructor
))
9545 /* We are within a class's scope. If our declarator name
9546 is the same as the class name, and we are defining
9547 a function, then it is a constructor/destructor, and
9548 therefore returns a void type. */
9550 /* ISO C++ 12.4/2. A destructor may not be declared
9551 const or volatile. A destructor may not be static.
9552 A destructor may not be declared with ref-qualifier.
9554 ISO C++ 12.1. A constructor may not be declared
9555 const or volatile. A constructor may not be
9556 virtual. A constructor may not be static.
9557 A constructor may not be declared with ref-qualifier. */
9559 error ((flags
== DTOR_FLAG
)
9560 ? G_("destructor cannot be static member function")
9561 : G_("constructor cannot be static member function"));
9564 error ((flags
== DTOR_FLAG
)
9565 ? G_("destructors may not be cv-qualified")
9566 : G_("constructors may not be cv-qualified"));
9567 memfn_quals
= TYPE_UNQUALIFIED
;
9572 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9573 error ((flags
== DTOR_FLAG
)
9574 ? "destructors may not be ref-qualified"
9575 : "constructors may not be ref-qualified");
9576 rqual
= REF_QUAL_NONE
;
9579 if (decl_context
== FIELD
9580 && !member_function_or_else (ctype
,
9583 return error_mark_node
;
9585 if (flags
!= DTOR_FLAG
)
9587 /* It's a constructor. */
9592 permerror (input_location
, "constructors cannot be declared virtual");
9595 if (decl_context
== FIELD
9596 && sfk
!= sfk_constructor
)
9597 return error_mark_node
;
9599 if (decl_context
== FIELD
)
9605 error ("can%'t initialize friend function %qs", name
);
9608 /* Cannot be both friend and virtual. */
9609 error ("virtual functions cannot be friends");
9612 if (decl_context
== NORMAL
)
9613 error ("friend declaration not in class definition");
9614 if (current_function_decl
&& funcdef_flag
)
9615 error ("can%'t define friend function %qs in a local "
9619 else if (ctype
&& sfk
== sfk_conversion
)
9623 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9628 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9631 if (inner_declarator
9632 && inner_declarator
->kind
== cdk_id
9633 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9634 && arg_types
!= void_list_node
)
9636 error ("destructors may not have parameters");
9637 arg_types
= void_list_node
;
9641 type
= build_function_type (type
, arg_types
);
9642 if (declarator
->std_attributes
)
9645 The optional attribute-specifier-seq appertains to
9646 the function type. */
9647 decl_attributes (&type
, declarator
->std_attributes
,
9655 /* Filter out pointers-to-references and references-to-references.
9656 We can get these if a TYPE_DECL is used. */
9658 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9660 if (declarator
->kind
!= cdk_reference
)
9662 error ("cannot declare pointer to %q#T", type
);
9663 type
= TREE_TYPE (type
);
9666 /* In C++0x, we allow reference to reference declarations
9667 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9668 and template type arguments [14.3.1/4 temp.arg.type]. The
9669 check for direct reference to reference declarations, which
9670 are still forbidden, occurs below. Reasoning behind the change
9671 can be found in DR106, DR540, and the rvalue reference
9673 else if (cxx_dialect
== cxx98
)
9675 error ("cannot declare reference to %q#T", type
);
9676 type
= TREE_TYPE (type
);
9679 else if (VOID_TYPE_P (type
))
9681 if (declarator
->kind
== cdk_reference
)
9682 error ("cannot declare reference to %q#T", type
);
9683 else if (declarator
->kind
== cdk_ptrmem
)
9684 error ("cannot declare pointer to %q#T member", type
);
9687 /* We now know that the TYPE_QUALS don't apply to the decl,
9688 but to the target of the pointer. */
9689 type_quals
= TYPE_UNQUALIFIED
;
9691 /* This code used to handle METHOD_TYPE, but I don't think it's
9692 possible to get it here anymore. */
9693 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9694 if (declarator
->kind
== cdk_ptrmem
9695 && TREE_CODE (type
) == FUNCTION_TYPE
)
9697 memfn_quals
|= type_memfn_quals (type
);
9698 type
= build_memfn_type (type
,
9699 declarator
->u
.pointer
.class_type
,
9702 if (type
== error_mark_node
)
9703 return error_mark_node
;
9705 rqual
= REF_QUAL_NONE
;
9706 memfn_quals
= TYPE_UNQUALIFIED
;
9709 if (TREE_CODE (type
) == FUNCTION_TYPE
9710 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9711 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9712 error (declarator
->kind
== cdk_reference
9713 ? G_("cannot declare reference to qualified function type %qT")
9714 : G_("cannot declare pointer to qualified function type %qT"),
9717 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
9718 pedwarn (input_location
, OPT_Wvla
,
9719 declarator
->kind
== cdk_reference
9720 ? G_("reference to array of runtime bound")
9721 : G_("pointer to array of runtime bound"));
9723 /* When the pointed-to type involves components of variable size,
9724 care must be taken to ensure that the size evaluation code is
9725 emitted early enough to dominate all the possible later uses
9726 and late enough for the variables on which it depends to have
9729 This is expected to happen automatically when the pointed-to
9730 type has a name/declaration of it's own, but special attention
9731 is required if the type is anonymous.
9733 We handle the NORMAL and FIELD contexts here by inserting a
9734 dummy statement that just evaluates the size at a safe point
9735 and ensures it is not deferred until e.g. within a deeper
9736 conditional context (c++/43555).
9738 We expect nothing to be needed here for PARM or TYPENAME.
9739 Evaluating the size at this point for TYPENAME would
9740 actually be incorrect, as we might be in the middle of an
9741 expression with side effects on the pointed-to type size
9742 "arguments" prior to the pointer declaration point and the
9743 size evaluation could end up prior to the side effects. */
9745 if (!TYPE_NAME (type
)
9746 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9747 && at_function_scope_p ()
9748 && variably_modified_type_p (type
, NULL_TREE
))
9750 /* First break out any side-effects. */
9751 stabilize_vla_size (TYPE_SIZE (type
));
9752 /* And then force evaluation of the SAVE_EXPR. */
9753 finish_expr_stmt (TYPE_SIZE (type
));
9756 if (declarator
->kind
== cdk_reference
)
9758 /* In C++0x, the type we are creating a reference to might be
9759 a typedef which is itself a reference type. In that case,
9760 we follow the reference collapsing rules in
9761 [7.1.3/8 dcl.typedef] to create the final reference type:
9763 "If a typedef TD names a type that is a reference to a type
9764 T, an attempt to create the type 'lvalue reference to cv TD'
9765 creates the type 'lvalue reference to T,' while an attempt
9766 to create the type "rvalue reference to cv TD' creates the
9769 if (VOID_TYPE_P (type
))
9770 /* We already gave an error. */;
9771 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9773 if (declarator
->u
.reference
.rvalue_ref
)
9774 /* Leave type alone. */;
9776 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9779 type
= cp_build_reference_type
9780 (type
, declarator
->u
.reference
.rvalue_ref
);
9782 /* In C++0x, we need this check for direct reference to
9783 reference declarations, which are forbidden by
9784 [8.3.2/5 dcl.ref]. Reference to reference declarations
9785 are only allowed indirectly through typedefs and template
9786 type arguments. Example:
9788 void foo(int & &); // invalid ref-to-ref decl
9790 typedef int & int_ref;
9791 void foo(int_ref &); // valid ref-to-ref decl
9793 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9794 error ("cannot declare reference to %q#T, which is not "
9795 "a typedef or a template type argument", type
);
9797 else if (TREE_CODE (type
) == METHOD_TYPE
)
9798 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9799 else if (declarator
->kind
== cdk_ptrmem
)
9801 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9803 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9804 /* We will already have complained. */
9805 type
= error_mark_node
;
9807 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9811 type
= build_pointer_type (type
);
9813 /* Process a list of type modifier keywords (such as
9814 const or volatile) that were given inside the `*' or `&'. */
9816 if (declarator
->u
.pointer
.qualifiers
)
9819 = cp_build_qualified_type (type
,
9820 declarator
->u
.pointer
.qualifiers
);
9821 type_quals
= cp_type_quals (type
);
9824 /* Apply C++11 attributes to the pointer, and not to the
9825 type pointed to. This is unlike what is done for GNU
9826 attributes above. It is to comply with [dcl.ptr]/1:
9828 [the optional attribute-specifier-seq (7.6.1) appertains
9829 to the pointer and not to the object pointed to]. */
9830 if (declarator
->std_attributes
)
9831 decl_attributes (&type
, declarator
->std_attributes
,
9845 /* We need to stabilize side-effects in VLA sizes for regular array
9846 declarations too, not just pointers to arrays. */
9847 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9848 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9849 && at_function_scope_p ()
9850 && variably_modified_type_p (type
, NULL_TREE
))
9851 stabilize_vla_size (TYPE_SIZE (type
));
9853 /* A `constexpr' specifier used in an object declaration declares
9854 the object as `const'. */
9855 if (constexpr_p
&& innermost_code
!= cdk_function
)
9857 if (type_quals
& TYPE_QUAL_VOLATILE
)
9858 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9859 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9861 type_quals
|= TYPE_QUAL_CONST
;
9862 type
= cp_build_qualified_type (type
, type_quals
);
9866 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9867 && TREE_CODE (type
) != FUNCTION_TYPE
9868 && TREE_CODE (type
) != METHOD_TYPE
)
9870 error ("template-id %qD used as a declarator",
9872 unqualified_id
= dname
;
9875 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9876 qualified with a class-name, turn it into a METHOD_TYPE, unless
9877 we know that the function is static. We take advantage of this
9878 opportunity to do other processing that pertains to entities
9879 explicitly declared to be class members. Note that if DECLARATOR
9880 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9881 would not have exited the loop above. */
9883 && declarator
->u
.id
.qualifying_scope
9884 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9886 ctype
= declarator
->u
.id
.qualifying_scope
;
9887 ctype
= TYPE_MAIN_VARIANT (ctype
);
9888 template_count
= num_template_headers_for_class (ctype
);
9890 if (ctype
== current_class_type
)
9894 permerror (input_location
, "member functions are implicitly friends of their class");
9898 permerror (declarator
->id_loc
,
9899 "extra qualification %<%T::%> on member %qs",
9902 else if (/* If the qualifying type is already complete, then we
9903 can skip the following checks. */
9904 !COMPLETE_TYPE_P (ctype
)
9905 && (/* If the function is being defined, then
9906 qualifying type must certainly be complete. */
9908 /* A friend declaration of "T::f" is OK, even if
9909 "T" is a template parameter. But, if this
9910 function is not a friend, the qualifying type
9912 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9913 /* For a declaration, the type need not be
9914 complete, if either it is dependent (since there
9915 is no meaningful definition of complete in that
9916 case) or the qualifying class is currently being
9918 || !(dependent_type_p (ctype
)
9919 || currently_open_class (ctype
)))
9920 /* Check that the qualifying type is complete. */
9921 && !complete_type_or_else (ctype
, NULL_TREE
))
9922 return error_mark_node
;
9923 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9925 if (current_class_type
9926 && (!friendp
|| funcdef_flag
))
9929 ? G_("cannot define member function %<%T::%s%> "
9931 : G_("cannot declare member function %<%T::%s%> "
9933 ctype
, name
, current_class_type
);
9934 return error_mark_node
;
9937 else if (typedef_p
&& current_class_type
)
9939 error ("cannot declare member %<%T::%s%> within %qT",
9940 ctype
, name
, current_class_type
);
9941 return error_mark_node
;
9945 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9946 ctype
= current_class_type
;
9948 /* Now TYPE has the actual type. */
9953 *attrlist
= chainon (returned_attrs
, *attrlist
);
9955 attrlist
= &returned_attrs
;
9959 && declarator
->kind
== cdk_id
9960 && declarator
->std_attributes
)
9961 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
9962 a declarator-id appertains to the entity that is declared. */
9963 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
9965 /* Handle parameter packs. */
9966 if (parameter_pack_p
)
9968 if (decl_context
== PARM
)
9969 /* Turn the type into a pack expansion.*/
9970 type
= make_pack_expansion (type
);
9972 error ("non-parameter %qs cannot be a parameter pack", name
);
9975 /* Did array size calculations overflow or does the array cover more
9976 than half of the address-space? */
9977 if (TREE_CODE (type
) == ARRAY_TYPE
9978 && COMPLETE_TYPE_P (type
)
9979 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9980 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
9982 error ("size of array %qs is too large", name
);
9983 /* If we proceed with the array type as it is, we'll eventually
9984 crash in tree_low_cst(). */
9985 type
= error_mark_node
;
9988 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9989 && !processing_template_decl
9990 && variably_modified_type_p (type
, NULL_TREE
))
9992 if (decl_context
== FIELD
)
9993 error ("data member may not have variably modified type %qT", type
);
9995 error ("parameter may not have variably modified type %qT", type
);
9996 type
= error_mark_node
;
9999 if (explicitp
== 1 || (explicitp
&& friendp
))
10001 /* [dcl.fct.spec] The explicit specifier shall only be used in
10002 declarations of constructors within a class definition. */
10003 error ("only declarations of constructors can be %<explicit%>");
10007 if (storage_class
== sc_mutable
)
10009 if (decl_context
!= FIELD
|| friendp
)
10011 error ("non-member %qs cannot be declared %<mutable%>", name
);
10012 storage_class
= sc_none
;
10014 else if (decl_context
== TYPENAME
|| typedef_p
)
10016 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10017 storage_class
= sc_none
;
10019 else if (TREE_CODE (type
) == FUNCTION_TYPE
10020 || TREE_CODE (type
) == METHOD_TYPE
)
10022 error ("function %qs cannot be declared %<mutable%>", name
);
10023 storage_class
= sc_none
;
10027 error ("static %qs cannot be declared %<mutable%>", name
);
10028 storage_class
= sc_none
;
10030 else if (type_quals
& TYPE_QUAL_CONST
)
10032 error ("const %qs cannot be declared %<mutable%>", name
);
10033 storage_class
= sc_none
;
10035 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10037 permerror (input_location
, "reference %qs cannot be declared "
10038 "%<mutable%>", name
);
10039 storage_class
= sc_none
;
10043 /* If this is declaring a typedef name, return a TYPE_DECL. */
10044 if (typedef_p
&& decl_context
!= TYPENAME
)
10048 /* Note that the grammar rejects storage classes
10049 in typenames, fields or parameters. */
10050 if (current_lang_name
== lang_name_java
)
10051 TYPE_FOR_JAVA (type
) = 1;
10053 /* This declaration:
10055 typedef void f(int) const;
10057 declares a function type which is not a member of any
10058 particular class, but which is cv-qualified; for
10059 example "f S::*" declares a pointer to a const-qualified
10060 member function of S. We record the cv-qualification in the
10062 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10064 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10066 /* We have now dealt with these qualifiers. */
10067 memfn_quals
= TYPE_UNQUALIFIED
;
10068 rqual
= REF_QUAL_NONE
;
10071 if (type_uses_auto (type
))
10073 error ("typedef declared %<auto%>");
10074 type
= error_mark_node
;
10077 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
10078 pedwarn (input_location
, OPT_Wvla
,
10079 "typedef naming array of runtime bound");
10081 if (decl_context
== FIELD
)
10082 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10084 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10085 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10086 error_at (DECL_SOURCE_LOCATION (decl
),
10087 "typedef name may not be a nested-name-specifier");
10088 TREE_TYPE (decl
) = error_mark_node
;
10091 if (decl_context
!= FIELD
)
10093 if (!current_function_decl
)
10094 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10095 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10096 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10097 (current_function_decl
)))
10098 /* The TYPE_DECL is "abstract" because there will be
10099 clones of this constructor/destructor, and there will
10100 be copies of this TYPE_DECL generated in those
10102 DECL_ABSTRACT (decl
) = 1;
10104 else if (current_class_type
10105 && constructor_name_p (unqualified_id
, current_class_type
))
10106 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10107 "as enclosing class",
10110 /* If the user declares "typedef struct {...} foo" then the
10111 struct will have an anonymous name. Fill that name in now.
10112 Nothing can refer to it, so nothing needs know about the name
10114 if (type
!= error_mark_node
10116 && TYPE_NAME (type
)
10117 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10118 && TYPE_ANONYMOUS_P (type
)
10119 && declspecs
->type_definition_p
10120 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10124 /* Replace the anonymous name with the real name everywhere. */
10125 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10127 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10128 /* We do not rename the debug info representing the
10129 anonymous tagged type because the standard says in
10130 [dcl.typedef] that the naming applies only for
10131 linkage purposes. */
10132 /*debug_hooks->set_name (t, decl);*/
10133 TYPE_NAME (t
) = decl
;
10136 if (TYPE_LANG_SPECIFIC (type
))
10137 TYPE_WAS_ANONYMOUS (type
) = 1;
10139 /* If this is a typedef within a template class, the nested
10140 type is a (non-primary) template. The name for the
10141 template needs updating as well. */
10142 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10143 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10144 = TYPE_IDENTIFIER (type
);
10146 /* Adjust linkage now that we aren't anonymous anymore. */
10147 reset_type_linkage (type
);
10149 /* FIXME remangle member functions; member functions of a
10150 type with external linkage have external linkage. */
10154 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10155 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10157 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10158 memfn_quals
!= TYPE_UNQUALIFIED
,
10159 inlinep
, friendp
, raises
!= NULL_TREE
);
10161 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10162 /* Acknowledge that this was written:
10163 `using analias = atype;'. */
10164 TYPE_DECL_ALIAS_P (decl
) = 1;
10169 /* Detect the case of an array type of unspecified size
10170 which came, as such, direct from a typedef name.
10171 We must copy the type, so that the array's domain can be
10172 individually set by the object's initializer. */
10174 if (type
&& typedef_type
10175 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10176 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10177 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10179 /* Detect where we're using a typedef of function type to declare a
10180 function. PARMS will not be set, so we must create it now. */
10182 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10184 tree decls
= NULL_TREE
;
10187 for (args
= TYPE_ARG_TYPES (type
);
10188 args
&& args
!= void_list_node
;
10189 args
= TREE_CHAIN (args
))
10191 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10193 DECL_CHAIN (decl
) = decls
;
10197 parms
= nreverse (decls
);
10199 if (decl_context
!= TYPENAME
)
10201 /* A cv-qualifier-seq shall only be part of the function type
10202 for a non-static member function. A ref-qualifier shall only
10203 .... /same as above/ [dcl.fct] */
10204 if ((type_memfn_quals (type
) != TYPE_UNQUALIFIED
10205 || type_memfn_rqual (type
) != REF_QUAL_NONE
)
10206 && (current_class_type
== NULL_TREE
|| staticp
) )
10209 ? G_("qualified function types cannot be used to "
10210 "declare static member functions")
10211 : G_("qualified function types cannot be used to "
10212 "declare free functions"));
10213 type
= TYPE_MAIN_VARIANT (type
);
10216 /* The qualifiers on the function type become the qualifiers on
10217 the non-static member function. */
10218 memfn_quals
|= type_memfn_quals (type
);
10219 rqual
= type_memfn_rqual (type
);
10220 type_quals
= TYPE_UNQUALIFIED
;
10224 /* If this is a type name (such as, in a cast or sizeof),
10225 compute the type and return it now. */
10227 if (decl_context
== TYPENAME
)
10229 /* Note that the grammar rejects storage classes
10230 in typenames, fields or parameters. */
10231 if (type_quals
!= TYPE_UNQUALIFIED
)
10232 type_quals
= TYPE_UNQUALIFIED
;
10234 /* Special case: "friend class foo" looks like a TYPENAME context. */
10237 if (type_quals
!= TYPE_UNQUALIFIED
)
10239 error ("type qualifiers specified for friend class declaration");
10240 type_quals
= TYPE_UNQUALIFIED
;
10244 error ("%<inline%> specified for friend class declaration");
10250 /* Don't allow friend declaration without a class-key. */
10251 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10252 permerror (input_location
, "template parameters cannot be friends");
10253 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10254 permerror (input_location
, "friend declaration requires class-key, "
10255 "i.e. %<friend class %T::%D%>",
10256 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10258 permerror (input_location
, "friend declaration requires class-key, "
10259 "i.e. %<friend %#T%>",
10263 /* Only try to do this stuff if we didn't already give up. */
10264 if (type
!= integer_type_node
)
10266 /* A friendly class? */
10267 if (current_class_type
)
10268 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10269 /*complain=*/true);
10271 error ("trying to make class %qT a friend of global scope",
10274 type
= void_type_node
;
10277 else if (memfn_quals
|| rqual
)
10279 if (ctype
== NULL_TREE
10280 && TREE_CODE (type
) == METHOD_TYPE
)
10281 ctype
= TYPE_METHOD_BASETYPE (type
);
10284 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10285 /* Core issue #547: need to allow this in template type args.
10286 Allow it in general in C++11 for alias-declarations. */
10287 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10288 && TREE_CODE (type
) == FUNCTION_TYPE
)
10289 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10291 error ("invalid qualifiers on non-member function type");
10296 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10297 && decl_context
!= CATCHPARM
10298 && TREE_CODE (type
) != UNION_TYPE
10301 error ("abstract declarator %qT used as declaration", type
);
10302 return error_mark_node
;
10305 /* Only functions may be declared using an operator-function-id. */
10307 && IDENTIFIER_OPNAME_P (unqualified_id
)
10308 && TREE_CODE (type
) != FUNCTION_TYPE
10309 && TREE_CODE (type
) != METHOD_TYPE
)
10311 error ("declaration of %qD as non-function", unqualified_id
);
10312 return error_mark_node
;
10315 /* We don't check parameter types here because we can emit a better
10316 error message later. */
10317 if (decl_context
!= PARM
)
10319 type
= check_var_type (unqualified_id
, type
);
10320 if (type
== error_mark_node
)
10321 return error_mark_node
;
10324 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10325 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10327 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10329 if (ctype
|| in_namespace
)
10330 error ("cannot use %<::%> in parameter declaration");
10332 if (type_uses_auto (type
))
10334 error ("parameter declared %<auto%>");
10335 type
= error_mark_node
;
10338 /* A parameter declared as an array of T is really a pointer to T.
10339 One declared as a function is really a pointer to a function.
10340 One declared as a member is really a pointer to member. */
10342 if (TREE_CODE (type
) == ARRAY_TYPE
)
10344 /* Transfer const-ness of array into that of type pointed to. */
10345 type
= build_pointer_type (TREE_TYPE (type
));
10346 type_quals
= TYPE_UNQUALIFIED
;
10348 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10349 type
= build_pointer_type (type
);
10352 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10353 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10355 cp_cv_quals real_quals
= memfn_quals
;
10356 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10357 real_quals
|= TYPE_QUAL_CONST
;
10358 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10364 if (decl_context
== PARM
)
10366 decl
= cp_build_parm_decl (unqualified_id
, type
);
10368 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10369 memfn_quals
!= TYPE_UNQUALIFIED
,
10370 inlinep
, friendp
, raises
!= NULL_TREE
);
10372 else if (decl_context
== FIELD
)
10374 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10375 && type_uses_auto (type
))
10377 error ("non-static data member declared %<auto%>");
10378 type
= error_mark_node
;
10381 /* The C99 flexible array extension. */
10382 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10383 && TYPE_DOMAIN (type
) == NULL_TREE
)
10385 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10386 tf_warning_or_error
);
10387 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10390 if (type
== error_mark_node
)
10392 /* Happens when declaring arrays of sizes which
10393 are error_mark_node, for example. */
10396 else if (in_namespace
&& !friendp
)
10398 /* Something like struct S { int N::j; }; */
10399 error ("invalid use of %<::%>");
10400 return error_mark_node
;
10402 else if (TREE_CODE (type
) == FUNCTION_TYPE
10403 || TREE_CODE (type
) == METHOD_TYPE
)
10406 tree function_context
;
10410 /* This should never happen in pure C++ (the check
10411 could be an assert). It could happen in
10412 Objective-C++ if someone writes invalid code that
10413 uses a function declaration for an instance
10414 variable or property (instance variables and
10415 properties are parsed as FIELD_DECLs, but they are
10416 part of an Objective-C class, not a C++ class).
10417 That code is invalid and is caught by this
10421 error ("declaration of function %qD in invalid context",
10423 return error_mark_node
;
10426 /* ``A union may [ ... ] not [ have ] virtual functions.''
10428 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10430 error ("function %qD declared virtual inside a union",
10432 return error_mark_node
;
10435 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10439 error ("%qD cannot be declared virtual, since it "
10440 "is always static",
10447 /* Check that the name used for a destructor makes sense. */
10448 if (sfk
== sfk_destructor
)
10450 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10454 gcc_assert (friendp
);
10455 error ("expected qualified name in friend declaration "
10456 "for destructor %qD", uqname
);
10457 return error_mark_node
;
10460 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10462 error ("declaration of %qD as member of %qT",
10464 return error_mark_node
;
10468 error ("a destructor cannot be %<constexpr%>");
10469 return error_mark_node
;
10472 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10474 error ("expected qualified name in friend declaration "
10475 "for constructor %qD",
10476 id_declarator
->u
.id
.unqualified_name
);
10477 return error_mark_node
;
10480 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10481 function_context
= (ctype
!= NULL_TREE
) ?
10482 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10483 publicp
= (! friendp
|| ! staticp
)
10484 && function_context
== NULL_TREE
;
10485 decl
= grokfndecl (ctype
, type
,
10486 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10487 ? unqualified_id
: dname
,
10490 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10491 friendp
? -1 : 0, friendp
, publicp
,
10492 inlinep
| (2 * constexpr_p
),
10494 funcdef_flag
, template_count
, in_namespace
,
10495 attrlist
, declarator
->id_loc
);
10496 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10497 if (decl
== NULL_TREE
)
10498 return error_mark_node
;
10500 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10501 /* The decl and setting of decl_attr is also turned off. */
10502 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10505 /* [class.conv.ctor]
10507 A constructor declared without the function-specifier
10508 explicit that can be called with a single parameter
10509 specifies a conversion from the type of its first
10510 parameter to the type of its class. Such a constructor
10511 is called a converting constructor. */
10512 if (explicitp
== 2)
10513 DECL_NONCONVERTING_P (decl
) = 1;
10515 else if (!staticp
&& !dependent_type_p (type
)
10516 && !COMPLETE_TYPE_P (complete_type (type
))
10517 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10519 if (unqualified_id
)
10520 error ("field %qD has incomplete type %qT",
10521 unqualified_id
, type
);
10523 error ("name %qT has incomplete type", type
);
10525 type
= error_mark_node
;
10532 error ("%qE is neither function nor member function; "
10533 "cannot be declared friend", unqualified_id
);
10541 /* Friends are treated specially. */
10542 if (ctype
== current_class_type
)
10543 ; /* We already issued a permerror. */
10544 else if (decl
&& DECL_NAME (decl
))
10546 if (template_class_depth (current_class_type
) == 0)
10548 decl
= check_explicit_specialization
10549 (unqualified_id
, decl
, template_count
,
10550 2 * funcdef_flag
+ 4);
10551 if (decl
== error_mark_node
)
10552 return error_mark_node
;
10555 decl
= do_friend (ctype
, unqualified_id
, decl
,
10561 return error_mark_node
;
10564 /* Structure field. It may not be a function, except for C++. */
10566 if (decl
== NULL_TREE
)
10570 /* C++ allows static class members. All other work
10571 for this is done by grokfield. */
10572 decl
= build_lang_decl_loc (declarator
->id_loc
,
10573 VAR_DECL
, unqualified_id
, type
);
10574 set_linkage_for_static_data_member (decl
);
10575 /* Even if there is an in-class initialization, DECL
10576 is considered undefined until an out-of-class
10577 definition is provided. */
10578 DECL_EXTERNAL (decl
) = 1;
10582 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10583 if (declspecs
->gnu_thread_keyword_p
)
10584 DECL_GNU_TLS_P (decl
) = true;
10587 if (constexpr_p
&& !initialized
)
10589 error ("constexpr static data member %qD must have an "
10590 "initializer", decl
);
10591 constexpr_p
= false;
10598 error ("non-static data member %qE declared %<constexpr%>",
10600 constexpr_p
= false;
10602 decl
= build_decl (input_location
,
10603 FIELD_DECL
, unqualified_id
, type
);
10604 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10605 if (bitfield
&& !unqualified_id
)
10606 TREE_NO_WARNING (decl
) = 1;
10608 if (storage_class
== sc_mutable
)
10610 DECL_MUTABLE_P (decl
) = 1;
10611 storage_class
= sc_none
;
10616 /* An attempt is being made to initialize a non-static
10617 member. This is new in C++11. */
10618 maybe_warn_cpp0x (CPP0X_NSDMI
);
10620 /* If this has been parsed with static storage class, but
10621 errors forced staticp to be cleared, ensure NSDMI is
10623 if (declspecs
->storage_class
== sc_static
)
10624 DECL_INITIAL (decl
) = error_mark_node
;
10628 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10629 memfn_quals
!= TYPE_UNQUALIFIED
,
10630 inlinep
, friendp
, raises
!= NULL_TREE
);
10633 else if (TREE_CODE (type
) == FUNCTION_TYPE
10634 || TREE_CODE (type
) == METHOD_TYPE
)
10636 tree original_name
;
10639 if (!unqualified_id
)
10640 return error_mark_node
;
10642 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10643 original_name
= dname
;
10645 original_name
= unqualified_id
;
10647 if (storage_class
== sc_auto
)
10648 error ("storage class %<auto%> invalid for function %qs", name
);
10649 else if (storage_class
== sc_register
)
10650 error ("storage class %<register%> invalid for function %qs", name
);
10653 if (declspecs
->gnu_thread_keyword_p
)
10654 error ("storage class %<__thread%> invalid for function %qs",
10657 error ("storage class %<thread_local%> invalid for function %qs",
10661 if (virt_specifiers
)
10662 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10663 /* Function declaration not at top level.
10664 Storage classes other than `extern' are not allowed
10665 and `extern' makes no difference. */
10666 if (! toplevel_bindings_p ()
10667 && (storage_class
== sc_static
10668 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10671 if (storage_class
== sc_static
)
10672 pedwarn (input_location
, OPT_Wpedantic
,
10673 "%<static%> specified invalid for function %qs "
10674 "declared out of global scope", name
);
10676 pedwarn (input_location
, OPT_Wpedantic
,
10677 "%<inline%> specifier invalid for function %qs "
10678 "declared out of global scope", name
);
10681 if (ctype
== NULL_TREE
)
10685 error ("virtual non-class function %qs", name
);
10688 else if (sfk
== sfk_constructor
10689 || sfk
== sfk_destructor
)
10691 error (funcdef_flag
10692 ? G_("%qs defined in a non-class scope")
10693 : G_("%qs declared in a non-class scope"), name
);
10698 /* Record whether the function is public. */
10699 publicp
= (ctype
!= NULL_TREE
10700 || storage_class
!= sc_static
);
10702 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10703 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10705 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10707 template_count
, in_namespace
, attrlist
,
10708 declarator
->id_loc
);
10709 if (decl
== NULL_TREE
)
10710 return error_mark_node
;
10714 int invalid_static
= 0;
10716 /* Don't allow a static member function in a class, and forbid
10717 declaring main to be static. */
10718 if (TREE_CODE (type
) == METHOD_TYPE
)
10720 permerror (input_location
, "cannot declare member function %qD to have "
10721 "static linkage", decl
);
10722 invalid_static
= 1;
10724 else if (current_function_decl
)
10726 /* FIXME need arm citation */
10727 error ("cannot declare static function inside another function");
10728 invalid_static
= 1;
10731 if (invalid_static
)
10734 storage_class
= sc_none
;
10740 /* It's a variable. */
10742 /* An uninitialized decl with `extern' is a reference. */
10743 decl
= grokvardecl (type
, unqualified_id
,
10746 (type_quals
& TYPE_QUAL_CONST
) != 0,
10747 ctype
? ctype
: in_namespace
);
10748 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10749 memfn_quals
!= TYPE_UNQUALIFIED
,
10750 inlinep
, friendp
, raises
!= NULL_TREE
);
10754 DECL_CONTEXT (decl
) = ctype
;
10757 permerror (input_location
, "%<static%> may not be used when defining "
10758 "(as opposed to declaring) a static data member");
10760 storage_class
= sc_none
;
10762 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10764 error ("static member %qD declared %<register%>", decl
);
10765 storage_class
= sc_none
;
10767 if (storage_class
== sc_extern
&& pedantic
)
10769 pedwarn (input_location
, OPT_Wpedantic
,
10770 "cannot explicitly declare member %q#D to have "
10771 "extern linkage", decl
);
10772 storage_class
= sc_none
;
10775 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10777 error ("declaration of constexpr variable %qD is not a definition",
10779 constexpr_p
= false;
10783 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10785 if (toplevel_bindings_p ())
10787 /* It's common practice (and completely valid) to have a const
10788 be initialized and declared extern. */
10789 if (!(type_quals
& TYPE_QUAL_CONST
))
10790 warning (0, "%qs initialized and declared %<extern%>", name
);
10794 error ("%qs has both %<extern%> and initializer", name
);
10795 return error_mark_node
;
10799 /* Record `register' declaration for warnings on &
10800 and in case doing stupid register allocation. */
10802 if (storage_class
== sc_register
)
10803 DECL_REGISTER (decl
) = 1;
10804 else if (storage_class
== sc_extern
)
10805 DECL_THIS_EXTERN (decl
) = 1;
10806 else if (storage_class
== sc_static
)
10807 DECL_THIS_STATIC (decl
) = 1;
10809 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10810 if (constexpr_p
&& VAR_P (decl
))
10811 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10813 /* Record constancy and volatility on the DECL itself . There's
10814 no need to do this when processing a template; we'll do this
10815 for the instantiated declaration based on the type of DECL. */
10816 if (!processing_template_decl
)
10817 cp_apply_type_quals_to_decl (type_quals
, decl
);
10823 /* Subroutine of start_function. Ensure that each of the parameter
10824 types (as listed in PARMS) is complete, as is required for a
10825 function definition. */
10828 require_complete_types_for_parms (tree parms
)
10830 for (; parms
; parms
= DECL_CHAIN (parms
))
10832 if (dependent_type_p (TREE_TYPE (parms
)))
10834 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10835 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10837 relayout_decl (parms
);
10838 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10841 /* grokparms or complete_type_or_else will have already issued
10843 TREE_TYPE (parms
) = error_mark_node
;
10847 /* Returns nonzero if T is a local variable. */
10850 local_variable_p (const_tree t
)
10853 /* A VAR_DECL with a context that is a _TYPE is a static data
10855 && !TYPE_P (CP_DECL_CONTEXT (t
))
10856 /* Any other non-local variable must be at namespace scope. */
10857 && !DECL_NAMESPACE_SCOPE_P (t
))
10858 || (TREE_CODE (t
) == PARM_DECL
))
10864 /* Like local_variable_p, but suitable for use as a tree-walking
10868 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10871 if (local_variable_p (*tp
)
10872 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
10874 else if (TYPE_P (*tp
))
10875 *walk_subtrees
= 0;
10880 /* Check that ARG, which is a default-argument expression for a
10881 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10882 something goes wrong. DECL may also be a _TYPE node, rather than a
10883 DECL, if there is no DECL available. */
10886 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
10891 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10892 /* We get a DEFAULT_ARG when looking at an in-class declaration
10893 with a default argument. Ignore the argument for now; we'll
10894 deal with it after the class is complete. */
10903 decl_type
= TREE_TYPE (decl
);
10905 if (arg
== error_mark_node
10906 || decl
== error_mark_node
10907 || TREE_TYPE (arg
) == error_mark_node
10908 || decl_type
== error_mark_node
)
10909 /* Something already went wrong. There's no need to check
10911 return error_mark_node
;
10913 /* [dcl.fct.default]
10915 A default argument expression is implicitly converted to the
10917 ++cp_unevaluated_operand
;
10918 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
10920 --cp_unevaluated_operand
;
10922 if (warn_zero_as_null_pointer_constant
10923 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10924 && null_ptr_cst_p (arg
)
10925 && (complain
& tf_warning
)
10926 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
10927 return nullptr_node
;
10929 /* [dcl.fct.default]
10931 Local variables shall not be used in default argument
10934 The keyword `this' shall not be used in a default argument of a
10935 member function. */
10936 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10939 if (complain
& tf_warning_or_error
)
10941 if (DECL_NAME (var
) == this_identifier
)
10942 permerror (input_location
, "default argument %qE uses %qD",
10945 error ("default argument %qE uses local variable %qD", arg
, var
);
10947 return error_mark_node
;
10954 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10957 type_is_deprecated (tree type
)
10959 enum tree_code code
;
10960 if (TREE_DEPRECATED (type
))
10962 if (TYPE_NAME (type
)
10963 && TREE_DEPRECATED (TYPE_NAME (type
)))
10966 /* Do warn about using typedefs to a deprecated class. */
10967 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10968 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10970 code
= TREE_CODE (type
);
10972 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10973 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10974 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10975 return type_is_deprecated (TREE_TYPE (type
));
10977 if (TYPE_PTRMEMFUNC_P (type
))
10978 return type_is_deprecated
10979 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10984 /* Decode the list of parameter types for a function type.
10985 Given the list of things declared inside the parens,
10986 return a list of types.
10988 If this parameter does not end with an ellipsis, we append
10991 *PARMS is set to the chain of PARM_DECLs created. */
10994 grokparms (tree parmlist
, tree
*parms
)
10996 tree result
= NULL_TREE
;
10997 tree decls
= NULL_TREE
;
11001 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11003 tree type
= NULL_TREE
;
11004 tree init
= TREE_PURPOSE (parm
);
11005 tree decl
= TREE_VALUE (parm
);
11006 const char *errmsg
;
11008 if (parm
== void_list_node
)
11011 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11014 type
= TREE_TYPE (decl
);
11015 if (VOID_TYPE_P (type
))
11017 if (same_type_p (type
, void_type_node
)
11018 && DECL_SELF_REFERENCE_P (type
)
11019 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11020 /* this is a parmlist of `(void)', which is ok. */
11022 cxx_incomplete_type_error (decl
, type
);
11023 /* It's not a good idea to actually create parameters of
11024 type `void'; other parts of the compiler assume that a
11025 void type terminates the parameter list. */
11026 type
= error_mark_node
;
11027 TREE_TYPE (decl
) = error_mark_node
;
11030 if (type
!= error_mark_node
11031 && TYPE_FOR_JAVA (type
)
11032 && MAYBE_CLASS_TYPE_P (type
))
11034 error ("parameter %qD has Java class type", decl
);
11035 type
= error_mark_node
;
11036 TREE_TYPE (decl
) = error_mark_node
;
11040 if (type
!= error_mark_node
11041 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11044 type
= error_mark_node
;
11045 TREE_TYPE (decl
) = error_mark_node
;
11048 if (type
!= error_mark_node
)
11050 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11052 tree deptype
= type_is_deprecated (type
);
11054 warn_deprecated_use (deptype
, NULL_TREE
);
11057 /* Top-level qualifiers on the parameters are
11058 ignored for function types. */
11059 type
= cp_build_qualified_type (type
, 0);
11060 if (TREE_CODE (type
) == METHOD_TYPE
)
11062 error ("parameter %qD invalidly declared method type", decl
);
11063 type
= build_pointer_type (type
);
11064 TREE_TYPE (decl
) = type
;
11066 else if (abstract_virtuals_error (decl
, type
))
11067 any_error
= 1; /* Seems like a good idea. */
11068 else if (POINTER_TYPE_P (type
))
11070 /* [dcl.fct]/6, parameter types cannot contain pointers
11071 (references) to arrays of unknown bound. */
11072 tree t
= TREE_TYPE (type
);
11073 int ptr
= TYPE_PTR_P (type
);
11077 if (TYPE_PTR_P (t
))
11079 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11081 else if (!TYPE_DOMAIN (t
))
11085 if (TREE_CODE (t
) == ARRAY_TYPE
)
11087 ? G_("parameter %qD includes pointer to array of "
11088 "unknown bound %qT")
11089 : G_("parameter %qD includes reference to array of "
11090 "unknown bound %qT"),
11096 else if (init
&& !processing_template_decl
)
11097 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11100 DECL_CHAIN (decl
) = decls
;
11102 result
= tree_cons (init
, type
, result
);
11104 decls
= nreverse (decls
);
11105 result
= nreverse (result
);
11107 result
= chainon (result
, void_list_node
);
11114 /* D is a constructor or overloaded `operator='.
11116 Let T be the class in which D is declared. Then, this function
11119 -1 if D's is an ill-formed constructor or copy assignment operator
11120 whose first parameter is of type `T'.
11121 0 if D is not a copy constructor or copy assignment
11123 1 if D is a copy constructor or copy assignment operator whose
11124 first parameter is a reference to non-const qualified T.
11125 2 if D is a copy constructor or copy assignment operator whose
11126 first parameter is a reference to const qualified T.
11128 This function can be used as a predicate. Positive values indicate
11129 a copy constructor and nonzero values indicate a copy assignment
11133 copy_fn_p (const_tree d
)
11139 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11141 if (TREE_CODE (d
) == TEMPLATE_DECL
11142 || (DECL_TEMPLATE_INFO (d
)
11143 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11144 /* Instantiations of template member functions are never copy
11145 functions. Note that member functions of templated classes are
11146 represented as template functions internally, and we must
11147 accept those as copy functions. */
11150 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11154 arg_type
= TREE_VALUE (args
);
11155 if (arg_type
== error_mark_node
)
11158 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11160 /* Pass by value copy assignment operator. */
11163 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11164 && !TYPE_REF_IS_RVALUE (arg_type
)
11165 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11167 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11173 args
= TREE_CHAIN (args
);
11175 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11176 /* There are more non-optional args. */
11182 /* D is a constructor or overloaded `operator='.
11184 Let T be the class in which D is declared. Then, this function
11185 returns true when D is a move constructor or move assignment
11186 operator, false otherwise. */
11189 move_fn_p (const_tree d
)
11191 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11193 if (cxx_dialect
== cxx98
)
11194 /* There are no move constructors if we are in C++98 mode. */
11197 if (TREE_CODE (d
) == TEMPLATE_DECL
11198 || (DECL_TEMPLATE_INFO (d
)
11199 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11200 /* Instantiations of template member functions are never move
11201 functions. Note that member functions of templated classes are
11202 represented as template functions internally, and we must
11203 accept those as move functions. */
11206 return move_signature_fn_p (d
);
11209 /* D is a constructor or overloaded `operator='.
11211 Then, this function returns true when D has the same signature as a move
11212 constructor or move assignment operator (because either it is such a
11213 ctor/op= or it is a template specialization with the same signature),
11214 false otherwise. */
11217 move_signature_fn_p (const_tree d
)
11221 bool result
= false;
11223 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11227 arg_type
= TREE_VALUE (args
);
11228 if (arg_type
== error_mark_node
)
11231 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11232 && TYPE_REF_IS_RVALUE (arg_type
)
11233 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11237 args
= TREE_CHAIN (args
);
11239 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11240 /* There are more non-optional args. */
11246 /* Remember any special properties of member function DECL. */
11249 grok_special_member_properties (tree decl
)
11253 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11256 class_type
= DECL_CONTEXT (decl
);
11257 if (DECL_CONSTRUCTOR_P (decl
))
11259 int ctor
= copy_fn_p (decl
);
11261 if (!DECL_ARTIFICIAL (decl
))
11262 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11268 A non-template constructor for class X is a copy
11269 constructor if its first parameter is of type X&, const
11270 X&, volatile X& or const volatile X&, and either there
11271 are no other parameters or else all other parameters have
11272 default arguments. */
11273 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11274 if (user_provided_p (decl
))
11275 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11277 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11279 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11281 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11282 if (user_provided_p (decl
))
11283 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11285 else if (move_fn_p (decl
) && user_provided_p (decl
))
11286 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11287 else if (is_list_ctor (decl
))
11288 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11290 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11291 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11292 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11294 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11298 A non-template assignment operator for class X is a copy
11299 assignment operator if its parameter is of type X, X&, const
11300 X&, volatile X& or const volatile X&. */
11302 int assop
= copy_fn_p (decl
);
11306 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11307 if (user_provided_p (decl
))
11308 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11310 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11312 else if (move_fn_p (decl
) && user_provided_p (decl
))
11313 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11315 /* Destructors are handled in check_methods. */
11318 /* Check a constructor DECL has the correct form. Complains
11319 if the class has a constructor of the form X(X). */
11322 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11324 int ctor_parm
= copy_fn_p (decl
);
11330 A declaration of a constructor for a class X is ill-formed if
11331 its first parameter is of type (optionally cv-qualified) X
11332 and either there are no other parameters or else all other
11333 parameters have default arguments.
11335 We *don't* complain about member template instantiations that
11336 have this form, though; they can occur as we try to decide
11337 what constructor to use during overload resolution. Since
11338 overload resolution will never prefer such a constructor to
11339 the non-template copy constructor (which is either explicitly
11340 or implicitly defined), there's no need to worry about their
11341 existence. Theoretically, they should never even be
11342 instantiated, but that's hard to forestall. */
11343 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11351 /* An operator with this code is unary, but can also be binary. */
11354 ambi_op_p (enum tree_code code
)
11356 return (code
== INDIRECT_REF
11357 || code
== ADDR_EXPR
11358 || code
== UNARY_PLUS_EXPR
11359 || code
== NEGATE_EXPR
11360 || code
== PREINCREMENT_EXPR
11361 || code
== PREDECREMENT_EXPR
);
11364 /* An operator with this name can only be unary. */
11367 unary_op_p (enum tree_code code
)
11369 return (code
== TRUTH_NOT_EXPR
11370 || code
== BIT_NOT_EXPR
11371 || code
== COMPONENT_REF
11372 || code
== TYPE_EXPR
);
11375 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11376 errors are issued for invalid declarations. */
11379 grok_op_properties (tree decl
, bool complain
)
11381 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11383 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11384 tree name
= DECL_NAME (decl
);
11385 enum tree_code operator_code
;
11390 /* Count the number of arguments and check for ellipsis. */
11391 for (argtype
= argtypes
, arity
= 0;
11392 argtype
&& argtype
!= void_list_node
;
11393 argtype
= TREE_CHAIN (argtype
))
11395 ellipsis_p
= !argtype
;
11397 class_type
= DECL_CONTEXT (decl
);
11398 if (class_type
&& !CLASS_TYPE_P (class_type
))
11399 class_type
= NULL_TREE
;
11401 if (DECL_CONV_FN_P (decl
))
11402 operator_code
= TYPE_EXPR
;
11406 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11407 if (ansi_opname (CODE) == name) \
11409 operator_code = (CODE); \
11412 else if (ansi_assopname (CODE) == name) \
11414 operator_code = (CODE); \
11415 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11419 #include "operators.def"
11420 #undef DEF_OPERATOR
11422 gcc_unreachable ();
11425 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11426 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11429 switch (operator_code
)
11432 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11436 TYPE_GETS_DELETE (class_type
) |= 1;
11440 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11443 case VEC_DELETE_EXPR
:
11444 TYPE_GETS_DELETE (class_type
) |= 2;
11451 /* [basic.std.dynamic.allocation]/1:
11453 A program is ill-formed if an allocation function is declared
11454 in a namespace scope other than global scope or declared static
11457 The same also holds true for deallocation functions. */
11458 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11459 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11461 if (DECL_NAMESPACE_SCOPE_P (decl
))
11463 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11465 error ("%qD may not be declared within a namespace", decl
);
11468 else if (!TREE_PUBLIC (decl
))
11470 error ("%qD may not be declared as static", decl
);
11476 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11478 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11479 DECL_IS_OPERATOR_NEW (decl
) = 1;
11481 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11482 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11485 /* An operator function must either be a non-static member function
11486 or have at least one parameter of a class, a reference to a class,
11487 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11488 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11490 if (operator_code
== TYPE_EXPR
11491 || operator_code
== CALL_EXPR
11492 || operator_code
== COMPONENT_REF
11493 || operator_code
== ARRAY_REF
11494 || operator_code
== NOP_EXPR
)
11496 error ("%qD must be a nonstatic member function", decl
);
11503 if (DECL_STATIC_FUNCTION_P (decl
))
11505 error ("%qD must be either a non-static member "
11506 "function or a non-member function", decl
);
11510 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11512 tree arg
= non_reference (TREE_VALUE (p
));
11513 if (arg
== error_mark_node
)
11516 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11517 because these checks are performed even on
11518 template functions. */
11519 if (MAYBE_CLASS_TYPE_P (arg
)
11520 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11524 if (!p
|| p
== void_list_node
)
11527 error ("%qD must have an argument of class or "
11528 "enumerated type", decl
);
11534 /* There are no restrictions on the arguments to an overloaded
11536 if (operator_code
== CALL_EXPR
)
11539 /* Warn about conversion operators that will never be used. */
11540 if (IDENTIFIER_TYPENAME_P (name
)
11541 && ! DECL_TEMPLATE_INFO (decl
)
11543 /* Warn only declaring the function; there is no need to
11544 warn again about out-of-class definitions. */
11545 && class_type
== current_class_type
)
11547 tree t
= TREE_TYPE (name
);
11548 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11551 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11553 if (VOID_TYPE_P (t
))
11554 warning (OPT_Wconversion
,
11556 ? G_("conversion to a reference to void "
11557 "will never use a type conversion operator")
11558 : G_("conversion to void "
11559 "will never use a type conversion operator"));
11560 else if (class_type
)
11562 if (t
== class_type
)
11563 warning (OPT_Wconversion
,
11565 ? G_("conversion to a reference to the same type "
11566 "will never use a type conversion operator")
11567 : G_("conversion to the same type "
11568 "will never use a type conversion operator"));
11569 /* Don't force t to be complete here. */
11570 else if (MAYBE_CLASS_TYPE_P (t
)
11571 && COMPLETE_TYPE_P (t
)
11572 && DERIVED_FROM_P (t
, class_type
))
11573 warning (OPT_Wconversion
,
11575 ? G_("conversion to a reference to a base class "
11576 "will never use a type conversion operator")
11577 : G_("conversion to a base class "
11578 "will never use a type conversion operator"));
11583 if (operator_code
== COND_EXPR
)
11586 error ("ISO C++ prohibits overloading operator ?:");
11589 else if (ellipsis_p
)
11591 error ("%qD must not have variable number of arguments", decl
);
11594 else if (ambi_op_p (operator_code
))
11597 /* We pick the one-argument operator codes by default, so
11598 we don't have to change anything. */
11600 else if (arity
== 2)
11602 /* If we thought this was a unary operator, we now know
11603 it to be a binary operator. */
11604 switch (operator_code
)
11607 operator_code
= MULT_EXPR
;
11611 operator_code
= BIT_AND_EXPR
;
11614 case UNARY_PLUS_EXPR
:
11615 operator_code
= PLUS_EXPR
;
11619 operator_code
= MINUS_EXPR
;
11622 case PREINCREMENT_EXPR
:
11623 operator_code
= POSTINCREMENT_EXPR
;
11626 case PREDECREMENT_EXPR
:
11627 operator_code
= POSTDECREMENT_EXPR
;
11631 gcc_unreachable ();
11634 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11636 if ((operator_code
== POSTINCREMENT_EXPR
11637 || operator_code
== POSTDECREMENT_EXPR
)
11638 && ! processing_template_decl
11639 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11642 error ("postfix %qD must take %<int%> as its argument",
11645 error ("postfix %qD must take %<int%> as its second "
11653 error ("%qD must take either zero or one argument", decl
);
11655 error ("%qD must take either one or two arguments", decl
);
11659 /* More Effective C++ rule 6. */
11661 && (operator_code
== POSTINCREMENT_EXPR
11662 || operator_code
== POSTDECREMENT_EXPR
11663 || operator_code
== PREINCREMENT_EXPR
11664 || operator_code
== PREDECREMENT_EXPR
))
11666 tree arg
= TREE_VALUE (argtypes
);
11667 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11668 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11669 arg
= TREE_TYPE (arg
);
11670 arg
= TYPE_MAIN_VARIANT (arg
);
11671 if (operator_code
== PREINCREMENT_EXPR
11672 || operator_code
== PREDECREMENT_EXPR
)
11674 if (TREE_CODE (ret
) != REFERENCE_TYPE
11675 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11677 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11678 build_reference_type (arg
));
11682 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11683 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11687 else if (unary_op_p (operator_code
))
11692 error ("%qD must take %<void%>", decl
);
11694 error ("%qD must take exactly one argument", decl
);
11698 else /* if (binary_op_p (operator_code)) */
11703 error ("%qD must take exactly one argument", decl
);
11705 error ("%qD must take exactly two arguments", decl
);
11709 /* More Effective C++ rule 7. */
11711 && (operator_code
== TRUTH_ANDIF_EXPR
11712 || operator_code
== TRUTH_ORIF_EXPR
11713 || operator_code
== COMPOUND_EXPR
))
11714 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11718 /* Effective C++ rule 23. */
11721 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11722 && (operator_code
== PLUS_EXPR
11723 || operator_code
== MINUS_EXPR
11724 || operator_code
== TRUNC_DIV_EXPR
11725 || operator_code
== MULT_EXPR
11726 || operator_code
== TRUNC_MOD_EXPR
)
11727 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11728 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11730 /* [over.oper]/8 */
11731 for (; argtypes
&& argtypes
!= void_list_node
;
11732 argtypes
= TREE_CHAIN (argtypes
))
11733 if (TREE_PURPOSE (argtypes
))
11735 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11736 if (operator_code
== POSTINCREMENT_EXPR
11737 || operator_code
== POSTDECREMENT_EXPR
)
11739 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11744 error ("%qD cannot have default arguments", decl
);
11752 /* Return a string giving the keyword associate with CODE. */
11754 static const char *
11755 tag_name (enum tag_types code
)
11767 case typename_type
:
11770 gcc_unreachable ();
11774 /* Name lookup in an elaborated-type-specifier (after the keyword
11775 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11776 elaborated-type-specifier is invalid, issue a diagnostic and return
11777 error_mark_node; otherwise, return the *_TYPE to which it referred.
11778 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11781 check_elaborated_type_specifier (enum tag_types tag_code
,
11783 bool allow_template_p
)
11789 struct S { struct S *p; };
11791 name lookup will find the TYPE_DECL for the implicit "S::S"
11792 typedef. Adjust for that here. */
11793 if (DECL_SELF_REFERENCE_P (decl
))
11794 decl
= TYPE_NAME (TREE_TYPE (decl
));
11796 type
= TREE_TYPE (decl
);
11798 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11799 is false for this case as well. */
11800 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11802 error ("using template type parameter %qT after %qs",
11803 type
, tag_name (tag_code
));
11804 return error_mark_node
;
11806 /* Accept template template parameters. */
11807 else if (allow_template_p
11808 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11809 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11813 If the identifier resolves to a typedef-name or the
11814 simple-template-id resolves to an alias template
11815 specialization, the elaborated-type-specifier is ill-formed.
11817 In other words, the only legitimate declaration to use in the
11818 elaborated type specifier is the implicit typedef created when
11819 the type is declared. */
11820 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11821 && !DECL_SELF_REFERENCE_P (decl
)
11822 && tag_code
!= typename_type
)
11824 if (alias_template_specialization_p (type
))
11825 error ("using alias template specialization %qT after %qs",
11826 type
, tag_name (tag_code
));
11828 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11829 inform (DECL_SOURCE_LOCATION (decl
),
11830 "%qD has a previous declaration here", decl
);
11831 return error_mark_node
;
11833 else if (TREE_CODE (type
) != RECORD_TYPE
11834 && TREE_CODE (type
) != UNION_TYPE
11835 && tag_code
!= enum_type
11836 && tag_code
!= typename_type
)
11838 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11839 error ("%q+T has a previous declaration here", type
);
11840 return error_mark_node
;
11842 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11843 && tag_code
== enum_type
)
11845 error ("%qT referred to as enum", type
);
11846 error ("%q+T has a previous declaration here", type
);
11847 return error_mark_node
;
11849 else if (!allow_template_p
11850 && TREE_CODE (type
) == RECORD_TYPE
11851 && CLASSTYPE_IS_TEMPLATE (type
))
11853 /* If a class template appears as elaborated type specifier
11854 without a template header such as:
11856 template <class T> class C {};
11857 void f(class C); // No template header here
11859 then the required template argument is missing. */
11860 error ("template argument required for %<%s %T%>",
11861 tag_name (tag_code
),
11862 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11863 return error_mark_node
;
11869 /* Lookup NAME in elaborate type specifier in scope according to
11870 SCOPE and issue diagnostics if necessary.
11871 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11872 found, and ERROR_MARK_NODE for type error. */
11875 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11876 tag_scope scope
, bool template_header_p
)
11880 if (scope
== ts_global
)
11882 /* First try ordinary name lookup, ignoring hidden class name
11883 injected via friend declaration. */
11884 decl
= lookup_name_prefer_type (name
, 2);
11885 /* If that fails, the name will be placed in the smallest
11886 non-class, non-function-prototype scope according to 3.3.1/5.
11887 We may already have a hidden name declared as friend in this
11888 scope. So lookup again but not ignoring hidden names.
11889 If we find one, that name will be made visible rather than
11890 creating a new tag. */
11892 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11895 decl
= lookup_type_scope (name
, scope
);
11898 && (DECL_CLASS_TEMPLATE_P (decl
)
11899 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11900 decl
= DECL_TEMPLATE_RESULT (decl
);
11902 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11904 /* Look for invalid nested type:
11908 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11910 error ("%qD has the same name as the class in which it is "
11913 return error_mark_node
;
11916 /* Two cases we need to consider when deciding if a class
11917 template is allowed as an elaborated type specifier:
11918 1. It is a self reference to its own class.
11919 2. It comes with a template header.
11923 template <class T> class C {
11924 class C *c1; // DECL_SELF_REFERENCE_P is true
11927 template <class U> class C; // template_header_p is true
11928 template <class T> class C<T>::D {
11929 class C *c2; // DECL_SELF_REFERENCE_P is true
11932 t
= check_elaborated_type_specifier (tag_code
,
11935 | DECL_SELF_REFERENCE_P (decl
));
11938 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11940 error ("reference to %qD is ambiguous", name
);
11941 print_candidates (decl
);
11942 return error_mark_node
;
11948 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11949 Define the tag as a forward-reference if it is not defined.
11951 If a declaration is given, process it here, and report an error if
11952 multiple declarations are not identical.
11954 SCOPE is TS_CURRENT when this is also a definition. Only look in
11955 the current frame for the name (since C++ allows new names in any
11956 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11957 declaration. Only look beginning from the current scope outward up
11958 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11960 TEMPLATE_HEADER_P is true when this declaration is preceded by
11961 a set of template parameters. */
11964 xref_tag_1 (enum tag_types tag_code
, tree name
,
11965 tag_scope orig_scope
, bool template_header_p
)
11967 enum tree_code code
;
11969 tree context
= NULL_TREE
;
11972 gcc_assert (identifier_p (name
));
11978 code
= RECORD_TYPE
;
11984 code
= ENUMERAL_TYPE
;
11987 gcc_unreachable ();
11990 if (orig_scope
== ts_lambda
)
11991 scope
= ts_current
;
11993 scope
= orig_scope
;
11995 /* In case of anonymous name, xref_tag is only called to
11996 make type node and push name. Name lookup is not required. */
11997 if (ANON_AGGRNAME_P (name
))
12000 t
= lookup_and_check_tag (tag_code
, name
,
12001 scope
, template_header_p
);
12003 if (t
== error_mark_node
)
12004 return error_mark_node
;
12006 if (scope
!= ts_current
&& t
&& current_class_type
12007 && template_class_depth (current_class_type
)
12008 && template_header_p
)
12010 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12013 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12014 definition of this tag. Since, in addition, we are currently
12015 processing a (member) template declaration of a template
12016 class, we must be very careful; consider:
12023 { template <class V>
12024 friend struct S1; };
12026 Here, the S2::S1 declaration should not be confused with the
12027 outer declaration. In particular, the inner version should
12028 have a template parameter of level 2, not level 1. This
12029 would be particularly important if the member declaration
12032 template <class V = U> friend struct S1;
12034 say, when we should tsubst into `U' when instantiating
12035 S2. On the other hand, when presented with:
12045 we must find the inner binding eventually. We
12046 accomplish this by making sure that the new type we
12047 create to represent this declaration has the right
12049 context
= TYPE_CONTEXT (t
);
12055 /* If no such tag is yet defined, create a forward-reference node
12056 and record it as the "definition".
12057 When a real declaration of this type is found,
12058 the forward-reference will be altered into a real type. */
12059 if (code
== ENUMERAL_TYPE
)
12061 error ("use of enum %q#D without previous declaration", name
);
12062 return error_mark_node
;
12066 t
= make_class_type (code
);
12067 TYPE_CONTEXT (t
) = context
;
12068 if (orig_scope
== ts_lambda
)
12069 /* Remember that we're declaring a lambda to avoid bogus errors
12070 in push_template_decl. */
12071 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12072 t
= pushtag (name
, t
, scope
);
12077 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12079 if (!redeclare_class_template (t
, current_template_parms
))
12080 return error_mark_node
;
12082 else if (!processing_template_decl
12083 && CLASS_TYPE_P (t
)
12084 && CLASSTYPE_IS_TEMPLATE (t
))
12086 error ("redeclaration of %qT as a non-template", t
);
12087 error ("previous declaration %q+D", t
);
12088 return error_mark_node
;
12091 /* Make injected friend class visible. */
12092 if (scope
!= ts_within_enclosing_non_class
12093 && hidden_name_p (TYPE_NAME (t
)))
12095 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12096 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12098 if (TYPE_TEMPLATE_INFO (t
))
12100 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12101 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12109 /* Wrapper for xref_tag_1. */
12112 xref_tag (enum tag_types tag_code
, tree name
,
12113 tag_scope scope
, bool template_header_p
)
12117 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12118 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12119 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12125 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12127 enum tag_types tag_kind
;
12129 if (TREE_CODE (old
) == RECORD_TYPE
)
12130 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12132 tag_kind
= union_type
;
12134 if (id
== NULL_TREE
)
12135 id
= TYPE_IDENTIFIER (old
);
12137 return xref_tag (tag_kind
, id
, scope
, false);
12140 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12141 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12142 access_* node, and the TREE_VALUE is the type of the base-class.
12143 Non-NULL TREE_TYPE indicates virtual inheritance.
12145 Returns true if the binfo hierarchy was successfully created,
12146 false if an error was detected. */
12149 xref_basetypes (tree ref
, tree base_list
)
12152 tree binfo
, base_binfo
;
12153 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12154 unsigned max_bases
= 0; /* Maximum direct bases. */
12156 tree default_access
;
12157 tree igo_prev
; /* Track Inheritance Graph Order. */
12159 if (ref
== error_mark_node
)
12162 /* The base of a derived class is private by default, all others are
12164 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12165 && CLASSTYPE_DECLARED_CLASS (ref
)
12166 ? access_private_node
: access_public_node
);
12168 /* First, make sure that any templates in base-classes are
12169 instantiated. This ensures that if we call ourselves recursively
12170 we do not get confused about which classes are marked and which
12172 basep
= &base_list
;
12175 tree basetype
= TREE_VALUE (*basep
);
12177 /* The dependent_type_p call below should really be dependent_scope_p
12178 so that we give a hard error about using an incomplete type as a
12179 base, but we allow it with a pedwarn for backward
12181 if (processing_template_decl
12182 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12183 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12184 if (!dependent_type_p (basetype
)
12185 && !complete_type_or_else (basetype
, NULL
))
12186 /* An incomplete type. Remove it from the list. */
12187 *basep
= TREE_CHAIN (*basep
);
12191 if (TREE_TYPE (*basep
))
12193 if (CLASS_TYPE_P (basetype
))
12194 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12195 basep
= &TREE_CHAIN (*basep
);
12199 TYPE_MARKED_P (ref
) = 1;
12201 /* The binfo slot should be empty, unless this is an (ill-formed)
12203 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12205 error ("redefinition of %q#T", ref
);
12209 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12211 binfo
= make_tree_binfo (max_bases
);
12213 TYPE_BINFO (ref
) = binfo
;
12214 BINFO_OFFSET (binfo
) = size_zero_node
;
12215 BINFO_TYPE (binfo
) = ref
;
12217 /* Apply base-class info set up to the variants of this type. */
12218 fixup_type_variants (ref
);
12222 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12223 /* An aggregate cannot have baseclasses. */
12224 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12226 if (TREE_CODE (ref
) == UNION_TYPE
)
12228 error ("derived union %qT invalid", ref
);
12235 if (TYPE_FOR_JAVA (ref
))
12237 error ("Java class %qT cannot have multiple bases", ref
);
12244 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12246 if (TYPE_FOR_JAVA (ref
))
12248 error ("Java class %qT cannot have virtual bases", ref
);
12253 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12255 tree access
= TREE_PURPOSE (base_list
);
12256 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12257 tree basetype
= TREE_VALUE (base_list
);
12259 if (access
== access_default_node
)
12260 access
= default_access
;
12262 if (PACK_EXPANSION_P (basetype
))
12263 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12264 if (TREE_CODE (basetype
) == TYPE_DECL
)
12265 basetype
= TREE_TYPE (basetype
);
12266 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12268 error ("base type %qT fails to be a struct or class type",
12273 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12274 TYPE_FOR_JAVA (ref
) = 1;
12276 base_binfo
= NULL_TREE
;
12277 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12279 base_binfo
= TYPE_BINFO (basetype
);
12280 /* The original basetype could have been a typedef'd type. */
12281 basetype
= BINFO_TYPE (base_binfo
);
12283 /* Inherit flags from the base. */
12284 TYPE_HAS_NEW_OPERATOR (ref
)
12285 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12286 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12287 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12288 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12289 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12290 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12291 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12292 CLASSTYPE_REPEATED_BASE_P (ref
)
12293 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12296 /* We must do this test after we've seen through a typedef
12298 if (TYPE_MARKED_P (basetype
))
12300 if (basetype
== ref
)
12301 error ("recursive type %qT undefined", basetype
);
12303 error ("duplicate base type %qT invalid", basetype
);
12307 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12308 /* Regenerate the pack expansion for the bases. */
12309 basetype
= make_pack_expansion (basetype
);
12311 TYPE_MARKED_P (basetype
) = 1;
12313 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12314 &igo_prev
, via_virtual
);
12315 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12316 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12318 BINFO_BASE_APPEND (binfo
, base_binfo
);
12319 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12322 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12323 /* If we didn't get max_vbases vbases, we must have shared at
12324 least one of them, and are therefore diamond shaped. */
12325 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12327 /* Unmark all the types. */
12328 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12329 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12330 TYPE_MARKED_P (ref
) = 0;
12332 /* Now see if we have a repeated base type. */
12333 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12335 for (base_binfo
= binfo
; base_binfo
;
12336 base_binfo
= TREE_CHAIN (base_binfo
))
12338 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12340 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12343 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12345 for (base_binfo
= binfo
; base_binfo
;
12346 base_binfo
= TREE_CHAIN (base_binfo
))
12347 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12348 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12357 /* Copies the enum-related properties from type SRC to type DST.
12358 Used with the underlying type of an enum and the enum itself. */
12360 copy_type_enum (tree dst
, tree src
)
12363 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12365 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12366 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12367 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12368 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12369 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12370 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12371 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12372 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12373 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12377 /* Begin compiling the definition of an enumeration type.
12380 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12382 UNDERLYING_TYPE is the type that will be used as the storage for
12383 the enumeration type. This should be NULL_TREE if no storage type
12386 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12388 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12390 Returns the type object, as yet incomplete.
12391 Also records info about it so that build_enumerator
12392 may be used to declare the individual values as they are read. */
12395 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12396 bool scoped_enum_p
, bool *is_new
)
12398 tree prevtype
= NULL_TREE
;
12399 gcc_assert (identifier_p (name
));
12403 /* [C++0x dcl.enum]p5:
12405 If not explicitly specified, the underlying type of a scoped
12406 enumeration type is int. */
12407 if (!underlying_type
&& scoped_enum_p
)
12408 underlying_type
= integer_type_node
;
12410 if (underlying_type
)
12411 underlying_type
= cv_unqualified (underlying_type
);
12413 /* If this is the real definition for a previous forward reference,
12414 fill in the contents in the same object that used to be the
12415 forward reference. */
12417 enumtype
= lookup_and_check_tag (enum_type
, name
,
12418 /*tag_scope=*/ts_current
,
12419 /*template_header_p=*/false);
12421 /* In case of a template_decl, the only check that should be deferred
12422 to instantiation time is the comparison of underlying types. */
12423 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12425 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12427 error_at (input_location
, "scoped/unscoped mismatch "
12428 "in enum %q#T", enumtype
);
12429 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12430 "previous definition here");
12431 enumtype
= error_mark_node
;
12433 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12435 error_at (input_location
, "underlying type mismatch "
12436 "in enum %q#T", enumtype
);
12437 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12438 "previous definition here");
12439 enumtype
= error_mark_node
;
12441 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12442 && !dependent_type_p (underlying_type
)
12443 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12444 && !same_type_p (underlying_type
,
12445 ENUM_UNDERLYING_TYPE (enumtype
)))
12447 error_at (input_location
, "different underlying type "
12448 "in enum %q#T", enumtype
);
12449 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12450 "previous definition here");
12451 underlying_type
= NULL_TREE
;
12455 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12456 || processing_template_decl
)
12458 /* In case of error, make a dummy enum to allow parsing to
12460 if (enumtype
== error_mark_node
)
12462 name
= make_anon_name ();
12463 enumtype
= NULL_TREE
;
12466 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12467 of an opaque enum, or an opaque enum of an already defined
12468 enumeration (C++0x only).
12469 In any other case, it'll be NULL_TREE. */
12475 prevtype
= enumtype
;
12477 /* Do not push the decl more than once, unless we need to
12478 compare underlying types at instantiation time */
12480 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12481 || (underlying_type
12482 && dependent_type_p (underlying_type
))
12483 || (ENUM_UNDERLYING_TYPE (enumtype
)
12484 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12486 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12487 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12490 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12493 if (enumtype
== error_mark_node
)
12494 return error_mark_node
;
12496 /* The enum is considered opaque until the opening '{' of the
12497 enumerator list. */
12498 SET_OPAQUE_ENUM_P (enumtype
, true);
12499 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12502 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12504 if (underlying_type
)
12506 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12508 copy_type_enum (enumtype
, underlying_type
);
12509 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12511 else if (dependent_type_p (underlying_type
))
12512 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12514 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12515 underlying_type
, enumtype
);
12518 /* If into a template class, the returned enum is always the first
12519 declaration (opaque or not) seen. This way all the references to
12520 this type will be to the same declaration. The following ones are used
12521 only to check for definition errors. */
12522 if (prevtype
&& processing_template_decl
)
12528 /* After processing and defining all the values of an enumeration type,
12529 install their decls in the enumeration type.
12530 ENUMTYPE is the type object. */
12533 finish_enum_value_list (tree enumtype
)
12536 tree underlying_type
;
12539 tree minnode
, maxnode
;
12542 bool fixed_underlying_type_p
12543 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12545 /* We built up the VALUES in reverse order. */
12546 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12548 /* For an enum defined in a template, just set the type of the values;
12549 all further processing is postponed until the template is
12550 instantiated. We need to set the type so that tsubst of a CONST_DECL
12552 if (processing_template_decl
)
12554 for (values
= TYPE_VALUES (enumtype
);
12556 values
= TREE_CHAIN (values
))
12557 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12561 /* Determine the minimum and maximum values of the enumerators. */
12562 if (TYPE_VALUES (enumtype
))
12564 minnode
= maxnode
= NULL_TREE
;
12566 for (values
= TYPE_VALUES (enumtype
);
12568 values
= TREE_CHAIN (values
))
12570 decl
= TREE_VALUE (values
);
12572 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12573 each enumerator has the type of its enumeration. Prior to the
12574 closing brace, the type of each enumerator is the type of its
12575 initializing value. */
12576 TREE_TYPE (decl
) = enumtype
;
12578 /* Update the minimum and maximum values, if appropriate. */
12579 value
= DECL_INITIAL (decl
);
12580 if (value
== error_mark_node
)
12581 value
= integer_zero_node
;
12582 /* Figure out what the minimum and maximum values of the
12583 enumerators are. */
12585 minnode
= maxnode
= value
;
12586 else if (tree_int_cst_lt (maxnode
, value
))
12588 else if (tree_int_cst_lt (value
, minnode
))
12595 If the enumerator-list is empty, the underlying type is as if
12596 the enumeration had a single enumerator with value 0. */
12597 minnode
= maxnode
= integer_zero_node
;
12599 if (!fixed_underlying_type_p
)
12601 /* Compute the number of bits require to represent all values of the
12602 enumeration. We must do this before the type of MINNODE and
12603 MAXNODE are transformed, since tree_int_cst_min_precision relies
12604 on the TREE_TYPE of the value it is passed. */
12605 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12606 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12607 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12608 int precision
= MAX (lowprec
, highprec
);
12610 bool use_short_enum
;
12612 /* Determine the underlying type of the enumeration.
12616 The underlying type of an enumeration is an integral type that
12617 can represent all the enumerator values defined in the
12618 enumeration. It is implementation-defined which integral type is
12619 used as the underlying type for an enumeration except that the
12620 underlying type shall not be larger than int unless the value of
12621 an enumerator cannot fit in an int or unsigned int.
12623 We use "int" or an "unsigned int" as the underlying type, even if
12624 a smaller integral type would work, unless the user has
12625 explicitly requested that we use the smallest possible type. The
12626 user can request that for all enumerations with a command line
12627 flag, or for just one enumeration with an attribute. */
12629 use_short_enum
= flag_short_enums
12630 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12632 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12636 underlying_type
= integer_types
[itk
];
12637 if (underlying_type
!= NULL_TREE
12638 && TYPE_PRECISION (underlying_type
) >= precision
12639 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12642 if (itk
== itk_none
)
12646 IF no integral type can represent all the enumerator values, the
12647 enumeration is ill-formed. */
12648 error ("no integral type can represent all of the enumerator values "
12649 "for %qT", enumtype
);
12650 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12651 underlying_type
= integer_types
[itk_unsigned_long_long
];
12656 The value of sizeof() applied to an enumeration type, an object
12657 of an enumeration type, or an enumerator, is the value of sizeof()
12658 applied to the underlying type. */
12659 copy_type_enum (enumtype
, underlying_type
);
12661 /* Compute the minimum and maximum values for the type.
12665 For an enumeration where emin is the smallest enumerator and emax
12666 is the largest, the values of the enumeration are the values of the
12667 underlying type in the range bmin to bmax, where bmin and bmax are,
12668 respectively, the smallest and largest values of the smallest bit-
12669 field that can store emin and emax. */
12671 /* The middle-end currently assumes that types with TYPE_PRECISION
12672 narrower than their underlying type are suitably zero or sign
12673 extended to fill their mode. Similarly, it assumes that the front
12674 end assures that a value of a particular type must be within
12675 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12677 We used to set these fields based on bmin and bmax, but that led
12678 to invalid assumptions like optimizing away bounds checking. So
12679 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12680 TYPE_MAX_VALUE to the values for the mode above and only restrict
12681 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12682 ENUM_UNDERLYING_TYPE (enumtype
)
12683 = build_distinct_type_copy (underlying_type
);
12684 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12685 set_min_and_max_values_for_integral_type
12686 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12688 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12689 if (flag_strict_enums
)
12690 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12694 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12696 /* Convert each of the enumerators to the type of the underlying
12697 type of the enumeration. */
12698 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12700 location_t saved_location
;
12702 decl
= TREE_VALUE (values
);
12703 saved_location
= input_location
;
12704 input_location
= DECL_SOURCE_LOCATION (decl
);
12705 if (fixed_underlying_type_p
)
12706 /* If the enumeration type has a fixed underlying type, we
12707 already checked all of the enumerator values. */
12708 value
= DECL_INITIAL (decl
);
12710 value
= perform_implicit_conversion (underlying_type
,
12711 DECL_INITIAL (decl
),
12712 tf_warning_or_error
);
12713 input_location
= saved_location
;
12715 /* Do not clobber shared ints. */
12716 value
= copy_node (value
);
12718 TREE_TYPE (value
) = enumtype
;
12719 DECL_INITIAL (decl
) = value
;
12722 /* Fix up all variant types of this enum type. */
12723 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12724 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12726 if (at_class_scope_p ()
12727 && COMPLETE_TYPE_P (current_class_type
)
12728 && UNSCOPED_ENUM_P (enumtype
))
12729 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12730 current_class_type
);
12732 /* Finish debugging output for this type. */
12733 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12736 /* Finishes the enum type. This is called only the first time an
12737 enumeration is seen, be it opaque or odinary.
12738 ENUMTYPE is the type object. */
12741 finish_enum (tree enumtype
)
12743 if (processing_template_decl
)
12745 if (at_function_scope_p ())
12746 add_stmt (build_min (TAG_DEFN
, enumtype
));
12750 /* If this is a forward declaration, there should not be any variants,
12751 though we can get a variant in the middle of an enum-specifier with
12752 wacky code like 'enum E { e = sizeof(const E*) };' */
12753 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12754 && (TYPE_VALUES (enumtype
)
12755 || !TYPE_NEXT_VARIANT (enumtype
)));
12758 /* Build and install a CONST_DECL for an enumeration constant of the
12759 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12760 LOC is the location of NAME.
12761 Assignment of sequential values by default is handled here. */
12764 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12770 /* If the VALUE was erroneous, pretend it wasn't there; that will
12771 result in the enum being assigned the next value in sequence. */
12772 if (value
== error_mark_node
)
12775 /* Remove no-op casts from the value. */
12777 STRIP_TYPE_NOPS (value
);
12779 if (! processing_template_decl
)
12781 /* Validate and default VALUE. */
12782 if (value
!= NULL_TREE
)
12784 value
= cxx_constant_value (value
);
12786 if (TREE_CODE (value
) != INTEGER_CST
12787 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12789 error ("enumerator value for %qD is not an integer constant",
12795 /* Default based on previous value. */
12796 if (value
== NULL_TREE
)
12798 if (TYPE_VALUES (enumtype
))
12803 /* C++03 7.2/4: If no initializer is specified for the first
12804 enumerator, the type is an unspecified integral
12805 type. Otherwise the type is the same as the type of the
12806 initializing value of the preceding enumerator unless the
12807 incremented value is not representable in that type, in
12808 which case the type is an unspecified integral type
12809 sufficient to contain the incremented value. */
12810 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12811 if (error_operand_p (prev_value
))
12812 value
= error_mark_node
;
12815 double_int di
= TREE_INT_CST (prev_value
)
12816 .add_with_sign (double_int_one
,
12817 false, &overflowed
);
12820 tree type
= TREE_TYPE (prev_value
);
12821 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12822 if (!double_int_fits_to_tree_p (type
, di
))
12825 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12827 type
= integer_types
[itk
];
12828 if (type
!= NULL_TREE
12829 && (pos
|| !TYPE_UNSIGNED (type
))
12830 && double_int_fits_to_tree_p (type
, di
))
12833 if (type
&& cxx_dialect
< cxx11
12834 && itk
> itk_unsigned_long
)
12835 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12836 incremented enumerator value is too large for %<unsigned long%>" : "\
12837 incremented enumerator value is too large for %<long%>");
12839 if (type
== NULL_TREE
)
12842 value
= double_int_to_tree (type
, di
);
12847 error ("overflow in enumeration values at %qD", name
);
12848 value
= error_mark_node
;
12853 value
= integer_zero_node
;
12856 /* Remove no-op casts from the value. */
12857 STRIP_TYPE_NOPS (value
);
12859 /* If the underlying type of the enum is fixed, check whether
12860 the enumerator values fits in the underlying type. If it
12861 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12862 if (ENUM_UNDERLYING_TYPE (enumtype
)
12864 && TREE_CODE (value
) == INTEGER_CST
)
12866 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12867 error ("enumerator value %E is outside the range of underlying "
12868 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12870 /* Convert the value to the appropriate type. */
12871 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12875 /* C++ associates enums with global, function, or class declarations. */
12876 context
= current_scope ();
12878 /* Build the actual enumeration constant. Note that the enumeration
12879 constants have the underlying type of the enum (if it is fixed)
12880 or the type of their initializer (if the underlying type of the
12881 enum is not fixed):
12885 If the underlying type is fixed, the type of each enumerator
12886 prior to the closing brace is the underlying type; if the
12887 initializing value of an enumerator cannot be represented by
12888 the underlying type, the program is ill-formed. If the
12889 underlying type is not fixed, the type of each enumerator is
12890 the type of its initializing value.
12892 If the underlying type is not fixed, it will be computed by
12893 finish_enum and we will reset the type of this enumerator. Of
12894 course, if we're processing a template, there may be no value. */
12895 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12897 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12899 DECL_CONTEXT (decl
) = enumtype
;
12900 TREE_CONSTANT (decl
) = 1;
12901 TREE_READONLY (decl
) = 1;
12902 DECL_INITIAL (decl
) = value
;
12904 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12905 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12906 on the TYPE_FIELDS list for `S'. (That's so that you can say
12907 things like `S::i' later.) */
12908 finish_member_declaration (decl
);
12912 /* Add this enumeration constant to the list for this type. */
12913 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12916 /* Look for an enumerator with the given NAME within the enumeration
12917 type ENUMTYPE. This routine is used primarily for qualified name
12918 lookup into an enumerator in C++0x, e.g.,
12920 enum class Color { Red, Green, Blue };
12922 Color color = Color::Red;
12924 Returns the value corresponding to the enumerator, or
12925 NULL_TREE if no such enumerator was found. */
12927 lookup_enumerator (tree enumtype
, tree name
)
12930 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12932 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12933 return e
? TREE_VALUE (e
) : NULL_TREE
;
12937 /* We're defining DECL. Make sure that its type is OK. */
12940 check_function_type (tree decl
, tree current_function_parms
)
12942 tree fntype
= TREE_TYPE (decl
);
12943 tree return_type
= complete_type (TREE_TYPE (fntype
));
12945 /* In a function definition, arg types must be complete. */
12946 require_complete_types_for_parms (current_function_parms
);
12948 if (dependent_type_p (return_type
)
12949 || type_uses_auto (return_type
))
12951 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12952 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12954 tree args
= TYPE_ARG_TYPES (fntype
);
12956 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12957 error ("return type %q#T is incomplete", return_type
);
12959 error ("return type has Java class type %q#T", return_type
);
12961 /* Make it return void instead. */
12962 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12963 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12965 TREE_CHAIN (args
));
12967 fntype
= build_function_type (void_type_node
, args
);
12969 = build_exception_variant (fntype
,
12970 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12971 fntype
= (cp_build_type_attribute_variant
12972 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12973 TREE_TYPE (decl
) = fntype
;
12976 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12979 /* Create the FUNCTION_DECL for a function definition.
12980 DECLSPECS and DECLARATOR are the parts of the declaration;
12981 they describe the function's name and the type it returns,
12982 but twisted together in a fashion that parallels the syntax of C.
12984 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12985 DECLARATOR is really the DECL for the function we are about to
12986 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12987 indicating that the function is an inline defined in-class.
12989 This function creates a binding context for the function body
12990 as well as setting up the FUNCTION_DECL in current_function_decl.
12992 For C++, we must first check whether that datum makes any sense.
12993 For example, "class A local_a(1,2);" means that variable local_a
12994 is an aggregate of type A, which should have a constructor
12995 applied to it with the argument list [1, 2].
12997 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12998 or may be a BLOCK if the function has been defined previously
12999 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13000 error_mark_node if the function has never been defined, or
13001 a BLOCK if the function has been defined somewhere. */
13004 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13006 tree ctype
= NULL_TREE
;
13009 int doing_friend
= 0;
13010 cp_binding_level
*bl
;
13011 tree current_function_parms
;
13012 struct c_fileinfo
*finfo
13013 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13014 bool honor_interface
;
13016 /* Sanity check. */
13017 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13018 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13020 fntype
= TREE_TYPE (decl1
);
13021 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13022 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13024 /* ISO C++ 11.4/5. A friend function defined in a class is in
13025 the (lexical) scope of the class in which it is defined. */
13026 if (!ctype
&& DECL_FRIEND_P (decl1
))
13028 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13030 /* CTYPE could be null here if we're dealing with a template;
13031 for example, `inline friend float foo()' inside a template
13032 will have no CTYPE set. */
13033 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13039 if (DECL_DECLARED_INLINE_P (decl1
)
13040 && lookup_attribute ("noinline", attrs
))
13041 warning (0, "inline function %q+D given attribute noinline", decl1
);
13043 /* Handle gnu_inline attribute. */
13044 if (GNU_INLINE_P (decl1
))
13046 DECL_EXTERNAL (decl1
) = 1;
13047 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13048 DECL_INTERFACE_KNOWN (decl1
) = 1;
13049 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13052 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13053 /* This is a constructor, we must ensure that any default args
13054 introduced by this definition are propagated to the clones
13055 now. The clones are used directly in overload resolution. */
13056 adjust_clone_args (decl1
);
13058 /* Sometimes we don't notice that a function is a static member, and
13059 build a METHOD_TYPE for it. Fix that up now. */
13060 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13061 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13063 /* Set up current_class_type, and enter the scope of the class, if
13066 push_nested_class (ctype
);
13067 else if (DECL_STATIC_FUNCTION_P (decl1
))
13068 push_nested_class (DECL_CONTEXT (decl1
));
13070 /* Now that we have entered the scope of the class, we must restore
13071 the bindings for any template parameters surrounding DECL1, if it
13072 is an inline member template. (Order is important; consider the
13073 case where a template parameter has the same name as a field of
13074 the class.) It is not until after this point that
13075 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13076 if (flags
& SF_INCLASS_INLINE
)
13077 maybe_begin_member_template_processing (decl1
);
13079 /* Effective C++ rule 15. */
13081 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13082 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13083 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13085 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13086 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13087 if (!DECL_INITIAL (decl1
))
13088 DECL_INITIAL (decl1
) = error_mark_node
;
13090 /* This function exists in static storage.
13091 (This does not mean `static' in the C sense!) */
13092 TREE_STATIC (decl1
) = 1;
13094 /* We must call push_template_decl after current_class_type is set
13095 up. (If we are processing inline definitions after exiting a
13096 class scope, current_class_type will be NULL_TREE until set above
13097 by push_nested_class.) */
13098 if (processing_template_decl
)
13100 tree newdecl1
= push_template_decl (decl1
);
13101 if (newdecl1
== error_mark_node
)
13103 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13104 pop_nested_class ();
13110 /* We are now in the scope of the function being defined. */
13111 current_function_decl
= decl1
;
13113 /* Save the parm names or decls from this function's declarator
13114 where store_parm_decls will find them. */
13115 current_function_parms
= DECL_ARGUMENTS (decl1
);
13117 /* Make sure the parameter and return types are reasonable. When
13118 you declare a function, these types can be incomplete, but they
13119 must be complete when you define the function. */
13120 check_function_type (decl1
, current_function_parms
);
13122 /* Build the return declaration for the function. */
13123 restype
= TREE_TYPE (fntype
);
13125 if (DECL_RESULT (decl1
) == NULL_TREE
)
13129 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13130 DECL_ARTIFICIAL (resdecl
) = 1;
13131 DECL_IGNORED_P (resdecl
) = 1;
13132 DECL_RESULT (decl1
) = resdecl
;
13134 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13137 /* Let the user know we're compiling this function. */
13138 announce_function (decl1
);
13140 /* Record the decl so that the function name is defined.
13141 If we already have a decl for this name, and it is a FUNCTION_DECL,
13142 use the old decl. */
13143 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13145 /* A specialization is not used to guide overload resolution. */
13146 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13147 && !(DECL_USE_TEMPLATE (decl1
) &&
13148 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13150 tree olddecl
= pushdecl (decl1
);
13152 if (olddecl
== error_mark_node
)
13153 /* If something went wrong when registering the declaration,
13154 use DECL1; we have to have a FUNCTION_DECL to use when
13155 parsing the body of the function. */
13159 /* Otherwise, OLDDECL is either a previous declaration
13160 of the same function or DECL1 itself. */
13162 if (warn_missing_declarations
13163 && olddecl
== decl1
13164 && !DECL_MAIN_P (decl1
)
13165 && TREE_PUBLIC (decl1
)
13166 && !DECL_DECLARED_INLINE_P (decl1
))
13170 /* Check whether DECL1 is in an anonymous
13172 for (context
= DECL_CONTEXT (decl1
);
13174 context
= DECL_CONTEXT (context
))
13176 if (TREE_CODE (context
) == NAMESPACE_DECL
13177 && DECL_NAME (context
) == NULL_TREE
)
13181 if (context
== NULL
)
13182 warning (OPT_Wmissing_declarations
,
13183 "no previous declaration for %q+D", decl1
);
13191 /* We need to set the DECL_CONTEXT. */
13192 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13193 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13195 fntype
= TREE_TYPE (decl1
);
13196 restype
= TREE_TYPE (fntype
);
13198 /* If #pragma weak applies, mark the decl appropriately now.
13199 The pragma only applies to global functions. Because
13200 determining whether or not the #pragma applies involves
13201 computing the mangled name for the declaration, we cannot
13202 apply the pragma until after we have merged this declaration
13203 with any previous declarations; if the original declaration
13204 has a linkage specification, that specification applies to
13205 the definition as well, and may affect the mangled name. */
13206 if (DECL_FILE_SCOPE_P (decl1
))
13207 maybe_apply_pragma_weak (decl1
);
13210 /* Reset this in case the call to pushdecl changed it. */
13211 current_function_decl
= decl1
;
13213 gcc_assert (DECL_INITIAL (decl1
));
13215 /* This function may already have been parsed, in which case just
13216 return; our caller will skip over the body without parsing. */
13217 if (DECL_INITIAL (decl1
) != error_mark_node
)
13220 /* Initialize RTL machinery. We cannot do this until
13221 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13222 even when processing a template; this is how we get
13223 CFUN set up, and our per-function variables initialized.
13224 FIXME factor out the non-RTL stuff. */
13225 bl
= current_binding_level
;
13226 allocate_struct_function (decl1
, processing_template_decl
);
13228 /* Initialize the language data structures. Whenever we start
13229 a new function, we destroy temporaries in the usual way. */
13230 cfun
->language
= ggc_alloc_cleared_language_function ();
13231 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13232 current_binding_level
= bl
;
13234 if (!processing_template_decl
&& type_uses_auto (restype
))
13236 FNDECL_USED_AUTO (decl1
) = true;
13237 current_function_auto_return_pattern
= restype
;
13240 /* Start the statement-tree, start the tree now. */
13241 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13243 /* If we are (erroneously) defining a function that we have already
13244 defined before, wipe out what we knew before. */
13245 if (!DECL_PENDING_INLINE_P (decl1
))
13246 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13248 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13250 /* We know that this was set up by `grokclassfn'. We do not
13251 wait until `store_parm_decls', since evil parse errors may
13252 never get us to that point. Here we keep the consistency
13253 between `current_class_type' and `current_class_ptr'. */
13254 tree t
= DECL_ARGUMENTS (decl1
);
13256 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13257 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13259 cp_function_chain
->x_current_class_ref
13260 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13261 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13262 cp_function_chain
->x_current_class_ptr
= t
;
13264 /* Constructors and destructors need to know whether they're "in
13265 charge" of initializing virtual base classes. */
13266 t
= DECL_CHAIN (t
);
13267 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13269 current_in_charge_parm
= t
;
13270 t
= DECL_CHAIN (t
);
13272 if (DECL_HAS_VTT_PARM_P (decl1
))
13274 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13275 current_vtt_parm
= t
;
13279 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13280 /* Implicitly-defined methods (like the
13281 destructor for a class in which no destructor
13282 is explicitly declared) must not be defined
13283 until their definition is needed. So, we
13284 ignore interface specifications for
13285 compiler-generated functions. */
13286 && !DECL_ARTIFICIAL (decl1
));
13288 if (processing_template_decl
)
13289 /* Don't mess with interface flags. */;
13290 else if (DECL_INTERFACE_KNOWN (decl1
))
13292 tree ctx
= decl_function_context (decl1
);
13294 if (DECL_NOT_REALLY_EXTERN (decl1
))
13295 DECL_EXTERNAL (decl1
) = 0;
13297 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13298 /* This is a function in a local class in an extern inline
13299 or template function. */
13300 comdat_linkage (decl1
);
13302 /* If this function belongs to an interface, it is public.
13303 If it belongs to someone else's interface, it is also external.
13304 This only affects inlines and template instantiations. */
13305 else if (!finfo
->interface_unknown
&& honor_interface
)
13307 if (DECL_DECLARED_INLINE_P (decl1
)
13308 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13310 DECL_EXTERNAL (decl1
)
13311 = (finfo
->interface_only
13312 || (DECL_DECLARED_INLINE_P (decl1
)
13313 && ! flag_implement_inlines
13314 && !DECL_VINDEX (decl1
)));
13316 /* For WIN32 we also want to put these in linkonce sections. */
13317 maybe_make_one_only (decl1
);
13320 DECL_EXTERNAL (decl1
) = 0;
13321 DECL_INTERFACE_KNOWN (decl1
) = 1;
13322 /* If this function is in an interface implemented in this file,
13323 make sure that the back end knows to emit this function
13325 if (!DECL_EXTERNAL (decl1
))
13326 mark_needed (decl1
);
13328 else if (finfo
->interface_unknown
&& finfo
->interface_only
13329 && honor_interface
)
13331 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13332 interface, we will have both finfo->interface_unknown and
13333 finfo->interface_only set. In that case, we don't want to
13334 use the normal heuristics because someone will supply a
13335 #pragma implementation elsewhere, and deducing it here would
13336 produce a conflict. */
13337 comdat_linkage (decl1
);
13338 DECL_EXTERNAL (decl1
) = 0;
13339 DECL_INTERFACE_KNOWN (decl1
) = 1;
13340 DECL_DEFER_OUTPUT (decl1
) = 1;
13344 /* This is a definition, not a reference.
13345 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13346 if (!GNU_INLINE_P (decl1
))
13347 DECL_EXTERNAL (decl1
) = 0;
13349 if ((DECL_DECLARED_INLINE_P (decl1
)
13350 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13351 && ! DECL_INTERFACE_KNOWN (decl1
))
13352 DECL_DEFER_OUTPUT (decl1
) = 1;
13354 DECL_INTERFACE_KNOWN (decl1
) = 1;
13357 /* Determine the ELF visibility attribute for the function. We must not
13358 do this before calling "pushdecl", as we must allow "duplicate_decls"
13359 to merge any attributes appropriately. We also need to wait until
13361 if (!DECL_CLONED_FUNCTION_P (decl1
))
13362 determine_visibility (decl1
);
13364 begin_scope (sk_function_parms
, decl1
);
13368 if (DECL_DESTRUCTOR_P (decl1
)
13369 || (DECL_CONSTRUCTOR_P (decl1
)
13370 && targetm
.cxx
.cdtor_returns_this ()))
13372 cdtor_label
= build_decl (input_location
,
13373 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13374 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13377 start_fname_decls ();
13379 store_parm_decls (current_function_parms
);
13385 /* Like start_preparsed_function, except that instead of a
13386 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13388 Returns true on success. If the DECLARATOR is not suitable
13389 for a function, we return false, which tells the parser to
13390 skip the entire function. */
13393 start_function (cp_decl_specifier_seq
*declspecs
,
13394 const cp_declarator
*declarator
,
13399 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13400 if (decl1
== error_mark_node
)
13402 /* If the declarator is not suitable for a function definition,
13403 cause a syntax error. */
13404 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13406 error ("invalid function declaration");
13410 if (DECL_MAIN_P (decl1
))
13411 /* main must return int. grokfndecl should have corrected it
13412 (and issued a diagnostic) if the user got it wrong. */
13413 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13414 integer_type_node
));
13416 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13419 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13423 use_eh_spec_block (tree fn
)
13425 return (flag_exceptions
&& flag_enforce_eh_specs
13426 && !processing_template_decl
13427 && !type_throw_all_p (TREE_TYPE (fn
))
13428 /* We insert the EH_SPEC_BLOCK only in the original
13429 function; then, it is copied automatically to the
13431 && !DECL_CLONED_FUNCTION_P (fn
)
13432 /* Implicitly-generated constructors and destructors have
13433 exception specifications. However, those specifications
13434 are the union of the possible exceptions specified by the
13435 constructors/destructors for bases and members, so no
13436 unallowed exception will ever reach this function. By
13437 not creating the EH_SPEC_BLOCK we save a little memory,
13438 and we avoid spurious warnings about unreachable
13440 && !DECL_DEFAULTED_FN (fn
));
13443 /* Store the parameter declarations into the current function declaration.
13444 This is called after parsing the parameter declarations, before
13445 digesting the body of the function.
13447 Also install to binding contour return value identifier, if any. */
13450 store_parm_decls (tree current_function_parms
)
13452 tree fndecl
= current_function_decl
;
13455 /* This is a chain of any other decls that came in among the parm
13456 declarations. If a parm is declared with enum {foo, bar} x;
13457 then CONST_DECLs for foo and bar are put here. */
13458 tree nonparms
= NULL_TREE
;
13460 if (current_function_parms
)
13462 /* This case is when the function was defined with an ANSI prototype.
13463 The parms already have decls, so we need not do anything here
13464 except record them as in effect
13465 and complain if any redundant old-style parm decls were written. */
13467 tree specparms
= current_function_parms
;
13470 /* Must clear this because it might contain TYPE_DECLs declared
13472 current_binding_level
->names
= NULL
;
13474 /* If we're doing semantic analysis, then we'll call pushdecl
13475 for each of these. We must do them in reverse order so that
13476 they end in the correct forward order. */
13477 specparms
= nreverse (specparms
);
13479 for (parm
= specparms
; parm
; parm
= next
)
13481 next
= DECL_CHAIN (parm
);
13482 if (TREE_CODE (parm
) == PARM_DECL
)
13484 if (DECL_NAME (parm
) == NULL_TREE
13485 || !VOID_TYPE_P (parm
))
13488 error ("parameter %qD declared void", parm
);
13492 /* If we find an enum constant or a type tag,
13493 put it aside for the moment. */
13494 TREE_CHAIN (parm
) = NULL_TREE
;
13495 nonparms
= chainon (nonparms
, parm
);
13499 /* Get the decls in their original chain order and record in the
13500 function. This is all and only the PARM_DECLs that were
13501 pushed into scope by the loop above. */
13502 DECL_ARGUMENTS (fndecl
) = getdecls ();
13505 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13507 /* Now store the final chain of decls for the arguments
13508 as the decl-chain of the current lexical scope.
13509 Put the enumerators in as well, at the front so that
13510 DECL_ARGUMENTS is not modified. */
13511 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13513 if (use_eh_spec_block (current_function_decl
))
13514 current_eh_spec_block
= begin_eh_spec_block ();
13518 /* We have finished doing semantic analysis on DECL, but have not yet
13519 generated RTL for its body. Save away our current state, so that
13520 when we want to generate RTL later we know what to do. */
13523 save_function_data (tree decl
)
13525 struct language_function
*f
;
13527 /* Save the language-specific per-function data so that we can
13528 get it back when we really expand this function. */
13529 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13532 f
= ggc_alloc_language_function ();
13533 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13534 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13536 /* Clear out the bits we don't need. */
13537 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13538 f
->bindings
= NULL
;
13539 f
->x_local_names
= NULL
;
13540 f
->base
.local_typedefs
= NULL
;
13544 /* Set the return value of the constructor (if present). */
13547 finish_constructor_body (void)
13552 if (targetm
.cxx
.cdtor_returns_this ()
13553 && (! TYPE_FOR_JAVA (current_class_type
)))
13555 /* Any return from a constructor will end up here. */
13556 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13558 val
= DECL_ARGUMENTS (current_function_decl
);
13559 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13560 DECL_RESULT (current_function_decl
), val
);
13561 /* Return the address of the object. */
13562 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13563 add_stmt (exprstmt
);
13567 /* Do all the processing for the beginning of a destructor; set up the
13568 vtable pointers and cleanups for bases and members. */
13571 begin_destructor_body (void)
13573 tree compound_stmt
;
13575 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13576 issued an error message. We still want to try to process the
13577 body of the function, but initialize_vtbl_ptrs will crash if
13578 TYPE_BINFO is NULL. */
13579 if (COMPLETE_TYPE_P (current_class_type
))
13581 compound_stmt
= begin_compound_stmt (0);
13582 /* Make all virtual function table pointers in non-virtual base
13583 classes point to CURRENT_CLASS_TYPE's virtual function
13585 initialize_vtbl_ptrs (current_class_ptr
);
13586 finish_compound_stmt (compound_stmt
);
13588 /* Insert a cleanup to let the back end know that the object is dead
13589 when we exit the destructor, either normally or via exception. */
13590 tree clobber
= build_constructor (current_class_type
, NULL
);
13591 TREE_THIS_VOLATILE (clobber
) = true;
13592 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13593 current_class_ref
, clobber
);
13594 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13596 /* And insert cleanups for our bases and members so that they
13597 will be properly destroyed if we throw. */
13598 push_base_cleanups ();
13602 /* At the end of every destructor we generate code to delete the object if
13603 necessary. Do that now. */
13606 finish_destructor_body (void)
13610 /* Any return from a destructor will end up here; that way all base
13611 and member cleanups will be run when the function returns. */
13612 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13614 /* In a virtual destructor, we must call delete. */
13615 if (DECL_VIRTUAL_P (current_function_decl
))
13618 tree virtual_size
= cxx_sizeof (current_class_type
);
13622 At the point of definition of a virtual destructor (including
13623 an implicit definition), non-placement operator delete shall
13624 be looked up in the scope of the destructor's class and if
13625 found shall be accessible and unambiguous. */
13626 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13628 /*global_p=*/false,
13629 /*placement=*/NULL_TREE
,
13630 /*alloc_fn=*/NULL_TREE
,
13631 tf_warning_or_error
);
13633 if_stmt
= begin_if_stmt ();
13634 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13635 current_in_charge_parm
,
13638 finish_expr_stmt (exprstmt
);
13639 finish_then_clause (if_stmt
);
13640 finish_if_stmt (if_stmt
);
13643 if (targetm
.cxx
.cdtor_returns_this ())
13647 val
= DECL_ARGUMENTS (current_function_decl
);
13648 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13649 DECL_RESULT (current_function_decl
), val
);
13650 /* Return the address of the object. */
13651 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13652 add_stmt (exprstmt
);
13656 /* Do the necessary processing for the beginning of a function body, which
13657 in this case includes member-initializers, but not the catch clauses of
13658 a function-try-block. Currently, this means opening a binding level
13659 for the member-initializers (in a ctor), member cleanups (in a dtor),
13660 and capture proxies (in a lambda operator()). */
13663 begin_function_body (void)
13667 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13670 if (processing_template_decl
)
13671 /* Do nothing now. */;
13673 /* Always keep the BLOCK node associated with the outermost pair of
13674 curly braces of a function. These are needed for correct
13675 operation of dwarfout.c. */
13676 keep_next_level (true);
13678 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13680 if (processing_template_decl
)
13681 /* Do nothing now. */;
13682 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13683 begin_destructor_body ();
13688 /* Do the processing for the end of a function body. Currently, this means
13689 closing out the cleanups for fully-constructed bases and members, and in
13690 the case of the destructor, deleting the object if desired. Again, this
13691 is only meaningful for [cd]tors, since they are the only functions where
13692 there is a significant distinction between the main body and any
13693 function catch clauses. Handling, say, main() return semantics here
13694 would be wrong, as flowing off the end of a function catch clause for
13695 main() would also need to return 0. */
13698 finish_function_body (tree compstmt
)
13700 if (compstmt
== NULL_TREE
)
13703 /* Close the block. */
13704 finish_compound_stmt (compstmt
);
13706 if (processing_template_decl
)
13707 /* Do nothing now. */;
13708 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13709 finish_constructor_body ();
13710 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13711 finish_destructor_body ();
13714 /* Given a function, returns the BLOCK corresponding to the outermost level
13715 of curly braces, skipping the artificial block created for constructor
13719 outer_curly_brace_block (tree fndecl
)
13721 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13722 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13723 /* Skip the artificial function body block. */
13724 block
= BLOCK_SUBBLOCKS (block
);
13728 /* If FNDECL is a class's key method, add the class to the list of
13729 keyed classes that should be emitted. */
13732 record_key_method_defined (tree fndecl
)
13734 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13735 && DECL_VIRTUAL_P (fndecl
)
13736 && !processing_template_decl
)
13738 tree fnclass
= DECL_CONTEXT (fndecl
);
13739 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13740 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13744 /* Subroutine of finish_function.
13745 Save the body of constexpr functions for possible
13746 future compile time evaluation. */
13749 maybe_save_function_definition (tree fun
)
13751 if (!processing_template_decl
13752 && DECL_DECLARED_CONSTEXPR_P (fun
)
13753 && !DECL_CLONED_FUNCTION_P (fun
))
13754 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13757 /* Finish up a function declaration and compile that function
13758 all the way to assembler language output. The free the storage
13759 for the function definition.
13761 FLAGS is a bitwise or of the following values:
13763 We just finished processing the body of an in-class inline
13764 function definition. (This processing will have taken place
13765 after the class definition is complete.) */
13768 finish_function (int flags
)
13770 tree fndecl
= current_function_decl
;
13771 tree fntype
, ctype
= NULL_TREE
;
13772 int inclass_inline
= (flags
& 2) != 0;
13774 /* When we get some parse errors, we can end up without a
13775 current_function_decl, so cope. */
13776 if (fndecl
== NULL_TREE
)
13777 return error_mark_node
;
13779 if (c_dialect_objc ())
13780 objc_finish_function ();
13782 gcc_assert (!defer_mark_used_calls
);
13783 defer_mark_used_calls
= true;
13785 record_key_method_defined (fndecl
);
13787 fntype
= TREE_TYPE (fndecl
);
13789 /* TREE_READONLY (fndecl) = 1;
13790 This caused &foo to be of type ptr-to-const-function
13791 which then got a warning when stored in a ptr-to-function variable. */
13793 gcc_assert (building_stmt_list_p ());
13794 /* The current function is being defined, so its DECL_INITIAL should
13795 be set, and unless there's a multiple definition, it should be
13796 error_mark_node. */
13797 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13799 /* For a cloned function, we've already got all the code we need;
13800 there's no need to add any extra bits. */
13801 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13803 /* Make it so that `main' always returns 0 by default. */
13804 if (DECL_MAIN_P (current_function_decl
))
13805 finish_return_stmt (integer_zero_node
);
13807 if (use_eh_spec_block (current_function_decl
))
13808 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13809 (TREE_TYPE (current_function_decl
)),
13810 current_eh_spec_block
);
13813 /* If we're saving up tree structure, tie off the function now. */
13814 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13816 finish_fname_decls ();
13818 /* If this function can't throw any exceptions, remember that. */
13819 if (!processing_template_decl
13820 && !cp_function_chain
->can_throw
13821 && !flag_non_call_exceptions
13822 && !decl_replaceable_p (fndecl
))
13823 TREE_NOTHROW (fndecl
) = 1;
13825 /* This must come after expand_function_end because cleanups might
13826 have declarations (from inline functions) that need to go into
13827 this function's blocks. */
13829 /* If the current binding level isn't the outermost binding level
13830 for this function, either there is a bug, or we have experienced
13831 syntax errors and the statement tree is malformed. */
13832 if (current_binding_level
->kind
!= sk_function_parms
)
13834 /* Make sure we have already experienced errors. */
13835 gcc_assert (errorcount
);
13837 /* Throw away the broken statement tree and extra binding
13839 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13841 while (current_binding_level
->kind
!= sk_function_parms
)
13843 if (current_binding_level
->kind
== sk_class
)
13844 pop_nested_class ();
13846 poplevel (0, 0, 0);
13849 poplevel (1, 0, 1);
13851 /* Statements should always be full-expressions at the outermost set
13852 of curly braces for a function. */
13853 gcc_assert (stmts_are_full_exprs_p ());
13855 /* If there are no return statements in a function with auto return type,
13856 the return type is void. But if the declared type is something like
13857 auto*, this is an error. */
13858 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13859 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13861 if (!is_auto (current_function_auto_return_pattern
)
13862 && !current_function_returns_value
&& !current_function_returns_null
)
13864 error ("no return statements in function returning %qT",
13865 current_function_auto_return_pattern
);
13866 inform (input_location
, "only plain %<auto%> return type can be "
13867 "deduced to %<void%>");
13869 apply_deduced_return_type (fndecl
, void_type_node
);
13870 fntype
= TREE_TYPE (fndecl
);
13873 /* Save constexpr function body before it gets munged by
13874 the NRV transformation. */
13875 maybe_save_function_definition (fndecl
);
13877 /* Set up the named return value optimization, if we can. Candidate
13878 variables are selected in check_return_expr. */
13879 if (current_function_return_value
)
13881 tree r
= current_function_return_value
;
13884 if (r
!= error_mark_node
13885 /* This is only worth doing for fns that return in memory--and
13886 simpler, since we don't have to worry about promoted modes. */
13887 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13888 /* Only allow this for variables declared in the outer scope of
13889 the function so we know that their lifetime always ends with a
13890 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13891 we were to do this optimization in tree-ssa. */
13892 && (outer
= outer_curly_brace_block (fndecl
))
13893 && chain_member (r
, BLOCK_VARS (outer
)))
13894 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13896 current_function_return_value
= NULL_TREE
;
13899 /* Remember that we were in class scope. */
13900 if (current_class_name
)
13901 ctype
= current_class_type
;
13903 /* Must mark the RESULT_DECL as being in this function. */
13904 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13906 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13907 to the FUNCTION_DECL node itself. */
13908 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13910 /* Save away current state, if appropriate. */
13911 if (!processing_template_decl
)
13912 save_function_data (fndecl
);
13914 /* Complain if there's just no return statement. */
13915 if (warn_return_type
13916 && !VOID_TYPE_P (TREE_TYPE (fntype
))
13917 && !dependent_type_p (TREE_TYPE (fntype
))
13918 && !current_function_returns_value
&& !current_function_returns_null
13919 /* Don't complain if we abort or throw. */
13920 && !current_function_returns_abnormally
13921 /* Don't complain if we are declared noreturn. */
13922 && !TREE_THIS_VOLATILE (fndecl
)
13923 && !DECL_NAME (DECL_RESULT (fndecl
))
13924 && !TREE_NO_WARNING (fndecl
)
13925 /* Structor return values (if any) are set by the compiler. */
13926 && !DECL_CONSTRUCTOR_P (fndecl
)
13927 && !DECL_DESTRUCTOR_P (fndecl
)
13928 && targetm
.warn_func_return (fndecl
))
13930 warning (OPT_Wreturn_type
,
13931 "no return statement in function returning non-void");
13932 TREE_NO_WARNING (fndecl
) = 1;
13935 /* Store the end of the function, so that we get good line number
13936 info for the epilogue. */
13937 cfun
->function_end_locus
= input_location
;
13939 /* Complain about parameters that are only set, but never otherwise used. */
13940 if (warn_unused_but_set_parameter
13941 && !processing_template_decl
13942 && errorcount
== unused_but_set_errorcount
13943 && !DECL_CLONED_FUNCTION_P (fndecl
))
13947 for (decl
= DECL_ARGUMENTS (fndecl
);
13949 decl
= DECL_CHAIN (decl
))
13950 if (TREE_USED (decl
)
13951 && TREE_CODE (decl
) == PARM_DECL
13952 && !DECL_READ_P (decl
)
13953 && DECL_NAME (decl
)
13954 && !DECL_ARTIFICIAL (decl
)
13955 && !TREE_NO_WARNING (decl
)
13956 && !DECL_IN_SYSTEM_HEADER (decl
)
13957 && TREE_TYPE (decl
) != error_mark_node
13958 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13959 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13960 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13961 warning (OPT_Wunused_but_set_parameter
,
13962 "parameter %q+D set but not used", decl
);
13963 unused_but_set_errorcount
= errorcount
;
13966 /* Complain about locally defined typedefs that are not used in this
13968 maybe_warn_unused_local_typedefs ();
13970 /* Genericize before inlining. */
13971 if (!processing_template_decl
)
13973 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13974 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13975 cp_genericize (fndecl
);
13976 /* Clear out the bits we don't need. */
13977 f
->x_current_class_ptr
= NULL
;
13978 f
->x_current_class_ref
= NULL
;
13979 f
->x_eh_spec_block
= NULL
;
13980 f
->x_in_charge_parm
= NULL
;
13981 f
->x_vtt_parm
= NULL
;
13982 f
->x_return_value
= NULL
;
13983 f
->bindings
= NULL
;
13984 f
->extern_decl_map
= NULL
;
13986 /* Clear out the bits we don't need. */
13987 local_names
= NULL
;
13989 /* We're leaving the context of this function, so zap cfun. It's still in
13990 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13992 current_function_decl
= NULL
;
13994 /* If this is an in-class inline definition, we may have to pop the
13995 bindings for the template parameters that we added in
13996 maybe_begin_member_template_processing when start_function was
13998 if (inclass_inline
)
13999 maybe_end_member_template_processing ();
14001 /* Leave the scope of the class. */
14003 pop_nested_class ();
14008 current_function_decl
= NULL_TREE
;
14010 defer_mark_used_calls
= false;
14011 if (deferred_mark_used_calls
)
14016 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14018 vec_free (deferred_mark_used_calls
);
14024 /* Create the FUNCTION_DECL for a function definition.
14025 DECLSPECS and DECLARATOR are the parts of the declaration;
14026 they describe the return type and the name of the function,
14027 but twisted together in a fashion that parallels the syntax of C.
14029 This function creates a binding context for the function body
14030 as well as setting up the FUNCTION_DECL in current_function_decl.
14032 Returns a FUNCTION_DECL on success.
14034 If the DECLARATOR is not suitable for a function (it defines a datum
14035 instead), we return 0, which tells yyparse to report a parse error.
14037 May return void_type_node indicating that this method is actually
14038 a friend. See grokfield for more details.
14040 Came here with a `.pushlevel' .
14042 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14043 CHANGES TO CODE IN `grokfield'. */
14046 grokmethod (cp_decl_specifier_seq
*declspecs
,
14047 const cp_declarator
*declarator
, tree attrlist
)
14049 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14052 if (fndecl
== error_mark_node
)
14053 return error_mark_node
;
14055 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14057 error ("invalid member function declaration");
14058 return error_mark_node
;
14062 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14064 /* Pass friends other than inline friend functions back. */
14065 if (fndecl
== void_type_node
)
14068 if (DECL_IN_AGGR_P (fndecl
))
14070 if (DECL_CLASS_SCOPE_P (fndecl
))
14071 error ("%qD is already defined in class %qT", fndecl
,
14072 DECL_CONTEXT (fndecl
));
14073 return error_mark_node
;
14076 check_template_shadow (fndecl
);
14078 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14079 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14081 /* We process method specializations in finish_struct_1. */
14082 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14084 fndecl
= push_template_decl (fndecl
);
14085 if (fndecl
== error_mark_node
)
14089 if (! DECL_FRIEND_P (fndecl
))
14091 if (DECL_CHAIN (fndecl
))
14093 fndecl
= copy_node (fndecl
);
14094 TREE_CHAIN (fndecl
) = NULL_TREE
;
14098 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14100 DECL_IN_AGGR_P (fndecl
) = 1;
14105 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14106 we can lay it out later, when and if its type becomes complete.
14108 Also handle constexpr pointer to member variables where the initializer
14109 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14112 maybe_register_incomplete_var (tree var
)
14114 gcc_assert (VAR_P (var
));
14116 /* Keep track of variables with incomplete types. */
14117 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14118 && DECL_EXTERNAL (var
))
14120 tree inner_type
= TREE_TYPE (var
);
14122 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14123 inner_type
= TREE_TYPE (inner_type
);
14124 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14126 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14127 /* RTTI TD entries are created while defining the type_info. */
14128 || (TYPE_LANG_SPECIFIC (inner_type
)
14129 && TYPE_BEING_DEFINED (inner_type
)))
14131 incomplete_var iv
= {var
, inner_type
};
14132 vec_safe_push (incomplete_vars
, iv
);
14134 else if (TYPE_PTRMEM_P (inner_type
)
14135 && DECL_INITIAL (var
)
14136 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14138 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14139 gcc_assert (TYPE_BEING_DEFINED (context
));
14140 incomplete_var iv
= {var
, context
};
14141 vec_safe_push (incomplete_vars
, iv
);
14146 /* Called when a class type (given by TYPE) is defined. If there are
14147 any existing VAR_DECLs whose type has been completed by this
14148 declaration, update them now. */
14151 complete_vars (tree type
)
14154 incomplete_var
*iv
;
14156 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14158 if (same_type_p (type
, iv
->incomplete_type
))
14160 tree var
= iv
->decl
;
14161 tree type
= TREE_TYPE (var
);
14163 if (TYPE_PTRMEM_P (type
))
14164 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14167 /* Complete the type of the variable. The VAR_DECL itself
14168 will be laid out in expand_expr. */
14169 complete_type (type
);
14170 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14173 /* Remove this entry from the list. */
14174 incomplete_vars
->unordered_remove (ix
);
14180 /* Check for pending declarations which may have abstract type. */
14181 complete_type_check_abstract (type
);
14184 /* If DECL is of a type which needs a cleanup, build and return an
14185 expression to perform that cleanup here. Return NULL_TREE if no
14186 cleanup need be done. */
14189 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14195 /* Assume no cleanup is required. */
14196 cleanup
= NULL_TREE
;
14198 if (error_operand_p (decl
))
14201 /* Handle "__attribute__((cleanup))". We run the cleanup function
14202 before the destructor since the destructor is what actually
14203 terminates the lifetime of the object. */
14204 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14211 /* Get the name specified by the user for the cleanup function. */
14212 id
= TREE_VALUE (TREE_VALUE (attr
));
14213 /* Look up the name to find the cleanup function to call. It is
14214 important to use lookup_name here because that is what is
14215 used in c-common.c:handle_cleanup_attribute when performing
14216 initial checks on the attribute. Note that those checks
14217 include ensuring that the function found is not an overloaded
14218 function, or an object with an overloaded call operator,
14219 etc.; we can rely on the fact that the function found is an
14220 ordinary FUNCTION_DECL. */
14221 fn
= lookup_name (id
);
14222 arg
= build_address (decl
);
14224 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14225 if (cleanup
== error_mark_node
)
14226 return error_mark_node
;
14228 /* Handle ordinary C++ destructors. */
14229 type
= TREE_TYPE (decl
);
14230 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
14232 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14233 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
14234 && CLASSTYPE_VBASECLASSES (type
));
14238 if (TREE_CODE (type
) == ARRAY_TYPE
)
14241 addr
= build_address (decl
);
14243 /* Optimize for space over speed here. */
14244 if (!has_vbases
|| flag_expensive_optimizations
)
14245 flags
|= LOOKUP_NONVIRTUAL
;
14247 call
= build_delete (TREE_TYPE (addr
), addr
,
14248 sfk_complete_destructor
, flags
, 0, complain
);
14249 if (call
== error_mark_node
)
14250 cleanup
= error_mark_node
;
14252 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14257 /* build_delete sets the location of the destructor call to the
14258 current location, even though the destructor is going to be
14259 called later, at the end of the current scope. This can lead to
14260 a "jumpy" behaviour for users of debuggers when they step around
14261 the end of the block. So let's unset the location of the
14262 destructor call instead. */
14263 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14264 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14269 /* When a stmt has been parsed, this function is called. */
14276 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14277 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14278 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14281 static_fn_type (tree memfntype
)
14286 if (TYPE_PTRMEMFUNC_P (memfntype
))
14287 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14288 if (POINTER_TYPE_P (memfntype
)
14289 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14290 memfntype
= TREE_TYPE (memfntype
);
14291 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14293 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14294 args
= TYPE_ARG_TYPES (memfntype
);
14295 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14296 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14297 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14298 fntype
= (cp_build_type_attribute_variant
14299 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14300 fntype
= (build_exception_variant
14301 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14305 /* DECL was originally constructed as a non-static member function,
14306 but turned out to be static. Update it accordingly. */
14309 revert_static_member_fn (tree decl
)
14311 tree stype
= static_fn_type (decl
);
14312 cp_cv_quals quals
= type_memfn_quals (stype
);
14313 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14315 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14316 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14318 TREE_TYPE (decl
) = stype
;
14320 if (DECL_ARGUMENTS (decl
))
14321 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14322 DECL_STATIC_FUNCTION_P (decl
) = 1;
14325 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14326 one of the language-independent trees. */
14328 enum cp_tree_node_structure_enum
14329 cp_tree_node_structure (union lang_tree_node
* t
)
14331 switch (TREE_CODE (&t
->generic
))
14333 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14334 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14335 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14336 case OVERLOAD
: return TS_CP_OVERLOAD
;
14337 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14338 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14339 case BASELINK
: return TS_CP_BASELINK
;
14340 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14341 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14342 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14343 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14344 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14345 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14346 default: return TS_CP_GENERIC
;
14350 /* Build the void_list_node (void_type_node having been created). */
14352 build_void_list_node (void)
14354 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14359 cp_missing_noreturn_ok_p (tree decl
)
14361 /* A missing noreturn is ok for the `main' function. */
14362 return DECL_MAIN_P (decl
);
14365 /* Return the COMDAT group into which DECL should be placed. */
14368 cxx_comdat_group (tree decl
)
14372 /* Virtual tables, construction virtual tables, and virtual table
14373 tables all go in a single COMDAT group, named after the primary
14375 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14376 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14377 /* For all other DECLs, the COMDAT group is the mangled name of the
14378 declaration itself. */
14381 while (DECL_THUNK_P (decl
))
14383 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14384 into the same section as the target function. In that case
14385 we must return target's name. */
14386 tree target
= THUNK_TARGET (decl
);
14387 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14388 && DECL_SECTION_NAME (target
) != NULL
14389 && DECL_ONE_ONLY (target
))
14394 name
= DECL_ASSEMBLER_NAME (decl
);
14400 /* Returns the return type for FN as written by the user, which may include
14401 a placeholder for a deduced return type. */
14404 fndecl_declared_return_type (tree fn
)
14406 fn
= STRIP_TEMPLATE (fn
);
14407 if (FNDECL_USED_AUTO (fn
))
14409 struct language_function
*f
= NULL
;
14410 if (DECL_STRUCT_FUNCTION (fn
))
14411 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14413 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14414 return f
->x_auto_return_pattern
;
14416 return TREE_TYPE (TREE_TYPE (fn
));
14419 /* Returns true iff DECL was declared with an auto return type and it has
14420 not yet been deduced to a real type. */
14423 undeduced_auto_decl (tree decl
)
14425 if (cxx_dialect
< cxx1y
)
14427 return type_uses_auto (TREE_TYPE (decl
));
14430 /* Complain if DECL has an undeduced return type. */
14433 require_deduced_type (tree decl
)
14435 if (undeduced_auto_decl (decl
))
14436 error ("use of %qD before deduction of %<auto%>", decl
);
14439 #include "gt-cp-decl.h"