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 "c-family/c-target.h"
48 #include "diagnostic.h"
52 #include "pointer-set.h"
53 #include "splay-tree.h"
57 /* Possible cases of bad specifiers type used by bad_specifiers. */
59 BSP_VAR
, /* variable */
60 BSP_PARM
, /* parameter */
65 static tree
grokparms (tree parmlist
, tree
*);
66 static const char *redeclaration_error_message (tree
, tree
);
68 static int decl_jump_unsafe (tree
);
69 static void require_complete_types_for_parms (tree
);
70 static int ambi_op_p (enum tree_code
);
71 static int unary_op_p (enum tree_code
);
72 static void push_local_name (tree
);
73 static tree
grok_reference_init (tree
, tree
, tree
, int);
74 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
76 static int check_static_variable_definition (tree
, tree
);
77 static void record_unknown_type (tree
, const char *);
78 static tree
builtin_function_1 (tree
, tree
, bool);
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
, int);
111 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
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 if (permerror (input_location
,
1150 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1151 inform (input_location
, "previous declaration of %q+D", olddecl
);
1154 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1155 function templates. If their exception specifications do not
1156 match, issue a diagnostic. */
1159 check_redeclaration_exception_specification (tree new_decl
,
1164 tree new_exceptions
;
1165 tree old_exceptions
;
1167 new_type
= TREE_TYPE (new_decl
);
1168 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1169 old_type
= TREE_TYPE (old_decl
);
1170 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1174 If any declaration of a function has an exception-specification,
1175 all declarations, including the definition and an explicit
1176 specialization, of that function shall have an
1177 exception-specification with the same set of type-ids. */
1178 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1179 && ! DECL_IS_BUILTIN (old_decl
)
1181 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1183 error ("declaration of %qF has a different exception specifier",
1185 error ("from previous declaration %q+F", old_decl
);
1189 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1190 Otherwise issue diagnostics. */
1193 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1195 old_decl
= STRIP_TEMPLATE (old_decl
);
1196 new_decl
= STRIP_TEMPLATE (new_decl
);
1197 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1198 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1200 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1201 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1203 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1205 if (DECL_BUILT_IN (old_decl
))
1207 /* Hide a built-in declaration. */
1208 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1209 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1212 /* 7.1.5 [dcl.constexpr]
1213 Note: An explicit specialization can differ from the template
1214 declaration with respect to the constexpr specifier. */
1215 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1216 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1219 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1220 error ("from previous declaration %q+D", old_decl
);
1224 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1225 && lookup_attribute ("gnu_inline", \
1226 DECL_ATTRIBUTES (fn)))
1228 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1229 If the redeclaration is invalid, a diagnostic is issued, and the
1230 error_mark_node is returned. Otherwise, OLDDECL is returned.
1232 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1235 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1238 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1240 unsigned olddecl_uid
= DECL_UID (olddecl
);
1241 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1242 int new_defines_function
= 0;
1243 tree new_template_info
;
1245 if (newdecl
== olddecl
)
1248 types_match
= decls_match (newdecl
, olddecl
);
1250 /* If either the type of the new decl or the type of the old decl is an
1251 error_mark_node, then that implies that we have already issued an
1252 error (earlier) for some bogus type specification, and in that case,
1253 it is rather pointless to harass the user with yet more error message
1254 about the same declaration, so just pretend the types match here. */
1255 if (TREE_TYPE (newdecl
) == error_mark_node
1256 || TREE_TYPE (olddecl
) == error_mark_node
)
1257 return error_mark_node
;
1259 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1260 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1262 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1263 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1264 && check_raw_literal_operator (olddecl
))
1265 error ("literal operator template %q+D conflicts with"
1266 " raw literal operator %qD", newdecl
, olddecl
);
1267 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1268 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1269 && check_raw_literal_operator (newdecl
))
1270 error ("raw literal operator %q+D conflicts with"
1271 " literal operator template %qD", newdecl
, olddecl
);
1274 if (DECL_P (olddecl
)
1275 && TREE_CODE (newdecl
) == FUNCTION_DECL
1276 && TREE_CODE (olddecl
) == FUNCTION_DECL
1277 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1279 if (DECL_DECLARED_INLINE_P (newdecl
)
1280 && DECL_UNINLINABLE (newdecl
)
1281 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1282 /* Already warned elsewhere. */;
1283 else if (DECL_DECLARED_INLINE_P (olddecl
)
1284 && DECL_UNINLINABLE (olddecl
)
1285 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1286 /* Already warned. */;
1287 else if (DECL_DECLARED_INLINE_P (newdecl
)
1288 && DECL_UNINLINABLE (olddecl
)
1289 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1291 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1293 inform (input_location
, "previous declaration of %q+D "
1294 "with attribute noinline", olddecl
);
1296 else if (DECL_DECLARED_INLINE_P (olddecl
)
1297 && DECL_UNINLINABLE (newdecl
)
1298 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1300 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1301 "attribute noinline", newdecl
))
1302 inform (input_location
, "previous declaration of %q+D was inline",
1307 /* Check for redeclaration and other discrepancies. */
1308 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1309 && DECL_ARTIFICIAL (olddecl
))
1311 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1312 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1314 /* Avoid warnings redeclaring built-ins which have not been
1315 explicitly declared. */
1316 if (DECL_ANTICIPATED (olddecl
))
1319 /* If you declare a built-in or predefined function name as static,
1320 the old definition is overridden, but optionally warn this was a
1321 bad choice of name. */
1322 if (! TREE_PUBLIC (newdecl
))
1324 warning (OPT_Wshadow
,
1325 DECL_BUILT_IN (olddecl
)
1326 ? G_("shadowing built-in function %q#D")
1327 : G_("shadowing library function %q#D"), olddecl
);
1328 /* Discard the old built-in function. */
1331 /* If the built-in is not ansi, then programs can override
1332 it even globally without an error. */
1333 else if (! DECL_BUILT_IN (olddecl
))
1334 warning (0, "library function %q#D redeclared as non-function %q#D",
1338 error ("declaration of %q#D", newdecl
);
1339 error ("conflicts with built-in declaration %q#D",
1344 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1346 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1347 error_at (DECL_SOURCE_LOCATION (newdecl
),
1348 "redeclaration of %<pragma omp declare reduction%>");
1349 error_at (DECL_SOURCE_LOCATION (olddecl
),
1350 "previous %<pragma omp declare reduction%> declaration");
1351 return error_mark_node
;
1353 else if (!types_match
)
1355 /* Avoid warnings redeclaring built-ins which have not been
1356 explicitly declared. */
1357 if (DECL_ANTICIPATED (olddecl
))
1359 /* Deal with fileptr_type_node. FILE type is not known
1360 at the time we create the builtins. */
1363 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1364 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1366 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1369 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1371 tree t
= TREE_VALUE (t1
);
1374 && TYPE_NAME (TREE_TYPE (t
))
1375 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1376 == get_identifier ("FILE")
1377 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1379 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1381 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1382 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1383 types_match
= decls_match (newdecl
, olddecl
);
1385 return duplicate_decls (newdecl
, olddecl
,
1387 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1390 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1393 else if ((DECL_EXTERN_C_P (newdecl
)
1394 && DECL_EXTERN_C_P (olddecl
))
1395 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1396 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1398 /* A near match; override the builtin. */
1400 if (TREE_PUBLIC (newdecl
))
1402 warning (0, "new declaration %q#D", newdecl
);
1403 warning (0, "ambiguates built-in declaration %q#D",
1407 warning (OPT_Wshadow
,
1408 DECL_BUILT_IN (olddecl
)
1409 ? G_("shadowing built-in function %q#D")
1410 : G_("shadowing library function %q#D"), olddecl
);
1413 /* Discard the old built-in function. */
1416 /* Replace the old RTL to avoid problems with inlining. */
1417 COPY_DECL_RTL (newdecl
, olddecl
);
1419 /* Even if the types match, prefer the new declarations type for
1420 built-ins which have not been explicitly declared, for
1421 exception lists, etc... */
1422 else if (DECL_IS_BUILTIN (olddecl
))
1424 tree type
= TREE_TYPE (newdecl
);
1425 tree attribs
= (*targetm
.merge_type_attributes
)
1426 (TREE_TYPE (olddecl
), type
);
1428 type
= cp_build_type_attribute_variant (type
, attribs
);
1429 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1432 /* If a function is explicitly declared "throw ()", propagate that to
1433 the corresponding builtin. */
1434 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1435 && DECL_ANTICIPATED (olddecl
)
1436 && TREE_NOTHROW (newdecl
)
1437 && !TREE_NOTHROW (olddecl
))
1439 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1440 tree tmpdecl
= builtin_decl_explicit (fncode
);
1441 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1442 TREE_NOTHROW (tmpdecl
) = 1;
1445 /* Whether or not the builtin can throw exceptions has no
1446 bearing on this declarator. */
1447 TREE_NOTHROW (olddecl
) = 0;
1449 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1451 /* If a builtin function is redeclared as `static', merge
1452 the declarations, but make the original one static. */
1453 DECL_THIS_STATIC (olddecl
) = 1;
1454 TREE_PUBLIC (olddecl
) = 0;
1456 /* Make the old declaration consistent with the new one so
1457 that all remnants of the builtin-ness of this function
1458 will be banished. */
1459 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1460 COPY_DECL_RTL (newdecl
, olddecl
);
1463 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1465 /* C++ Standard, 3.3, clause 4:
1466 "[Note: a namespace name or a class template name must be unique
1467 in its declarative region (7.3.2, clause 14). ]" */
1468 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1469 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1470 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1471 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1472 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1473 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1475 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1476 && TREE_CODE (newdecl
) != TYPE_DECL
)
1477 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1478 && TREE_CODE (olddecl
) != TYPE_DECL
))
1480 /* We do nothing special here, because C++ does such nasty
1481 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1482 get shadowed, and know that if we need to find a TYPE_DECL
1483 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1484 slot of the identifier. */
1488 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1489 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1490 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1491 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1495 error ("%q#D redeclared as different kind of symbol", newdecl
);
1496 if (TREE_CODE (olddecl
) == TREE_LIST
)
1497 olddecl
= TREE_VALUE (olddecl
);
1498 inform (input_location
, "previous declaration of %q+#D", olddecl
);
1500 return error_mark_node
;
1502 else if (!types_match
)
1504 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1505 /* These are certainly not duplicate declarations; they're
1506 from different scopes. */
1509 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1511 /* The name of a class template may not be declared to refer to
1512 any other template, class, function, object, namespace, value,
1513 or type in the same scope. */
1514 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1515 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1517 error ("declaration of template %q#D", newdecl
);
1518 error ("conflicts with previous declaration %q+#D", olddecl
);
1519 return error_mark_node
;
1521 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1522 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1523 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1524 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1525 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1526 DECL_TEMPLATE_PARMS (olddecl
))
1527 /* Template functions can be disambiguated by
1529 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1530 TREE_TYPE (TREE_TYPE (olddecl
))))
1532 error ("new declaration %q#D", newdecl
);
1533 error ("ambiguates old declaration %q+#D", olddecl
);
1537 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1539 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1541 error ("declaration of C function %q#D conflicts with",
1543 error ("previous declaration %q+#D here", olddecl
);
1546 /* For function versions, params and types match, but they
1547 are not ambiguous. */
1548 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1549 && !DECL_FUNCTION_VERSIONED (olddecl
))
1550 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1551 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1553 error ("new declaration %q#D", newdecl
);
1554 error ("ambiguates old declaration %q+#D", olddecl
);
1555 return error_mark_node
;
1562 error ("conflicting declaration %q#D", newdecl
);
1563 inform (input_location
,
1564 "%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1565 return error_mark_node
;
1568 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1569 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1570 && (!DECL_TEMPLATE_INFO (newdecl
)
1571 || (DECL_TI_TEMPLATE (newdecl
)
1572 != DECL_TI_TEMPLATE (olddecl
))))
1573 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1574 && (!DECL_TEMPLATE_INFO (olddecl
)
1575 || (DECL_TI_TEMPLATE (olddecl
)
1576 != DECL_TI_TEMPLATE (newdecl
))))))
1577 /* It's OK to have a template specialization and a non-template
1578 with the same type, or to have specializations of two
1579 different templates with the same type. Note that if one is a
1580 specialization, and the other is an instantiation of the same
1581 template, that we do not exit at this point. That situation
1582 can occur if we instantiate a template class, and then
1583 specialize one of its methods. This situation is valid, but
1584 the declarations must be merged in the usual way. */
1586 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1587 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1588 && !DECL_USE_TEMPLATE (newdecl
))
1589 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1590 && !DECL_USE_TEMPLATE (olddecl
))))
1591 /* One of the declarations is a template instantiation, and the
1592 other is not a template at all. That's OK. */
1594 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1596 /* In [namespace.alias] we have:
1598 In a declarative region, a namespace-alias-definition can be
1599 used to redefine a namespace-alias declared in that declarative
1600 region to refer only to the namespace to which it already
1603 Therefore, if we encounter a second alias directive for the same
1604 alias, we can just ignore the second directive. */
1605 if (DECL_NAMESPACE_ALIAS (newdecl
)
1606 && (DECL_NAMESPACE_ALIAS (newdecl
)
1607 == DECL_NAMESPACE_ALIAS (olddecl
)))
1609 /* [namespace.alias]
1611 A namespace-name or namespace-alias shall not be declared as
1612 the name of any other entity in the same declarative region.
1613 A namespace-name defined at global scope shall not be
1614 declared as the name of any other entity in any global scope
1616 error ("declaration of namespace %qD conflicts with", newdecl
);
1617 error ("previous declaration of namespace %q+D here", olddecl
);
1618 return error_mark_node
;
1622 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1625 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1626 if (DECL_NAME (olddecl
) != NULL_TREE
)
1627 inform (input_location
,
1628 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1629 ? G_("%q+#D previously defined here")
1630 : G_("%q+#D previously declared here"), olddecl
);
1631 return error_mark_node
;
1633 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1634 && DECL_INITIAL (olddecl
) != NULL_TREE
1635 && !prototype_p (TREE_TYPE (olddecl
))
1636 && prototype_p (TREE_TYPE (newdecl
)))
1638 /* Prototype decl follows defn w/o prototype. */
1639 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1640 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1641 "follows non-prototype definition here");
1643 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1644 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1647 If two declarations of the same function or object
1648 specify different linkage-specifications ..., the program
1649 is ill-formed.... Except for functions with C++ linkage,
1650 a function declaration without a linkage specification
1651 shall not precede the first linkage specification for
1652 that function. A function can be declared without a
1653 linkage specification after an explicit linkage
1654 specification has been seen; the linkage explicitly
1655 specified in the earlier declaration is not affected by
1656 such a function declaration.
1658 DR 563 raises the question why the restrictions on
1659 functions should not also apply to objects. Older
1660 versions of G++ silently ignore the linkage-specification
1668 which is clearly wrong. Therefore, we now treat objects
1670 if (current_lang_depth () == 0)
1672 /* There is no explicit linkage-specification, so we use
1673 the linkage from the previous declaration. */
1674 if (!DECL_LANG_SPECIFIC (newdecl
))
1675 retrofit_lang_decl (newdecl
);
1676 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1680 error ("previous declaration of %q+#D with %qL linkage",
1681 olddecl
, DECL_LANGUAGE (olddecl
));
1682 error ("conflicts with new declaration with %qL linkage",
1683 DECL_LANGUAGE (newdecl
));
1687 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1689 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1691 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1692 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1695 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1696 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1698 for (; t1
&& t1
!= void_list_node
;
1699 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1700 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1702 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1705 permerror (input_location
, "default argument given for parameter %d of %q#D",
1707 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1711 error ("default argument given for parameter %d of %q#D",
1713 error ("after previous specification in %q+#D",
1720 /* Do not merge an implicit typedef with an explicit one. In:
1724 typedef class A A __attribute__ ((foo));
1726 the attribute should apply only to the typedef. */
1727 if (TREE_CODE (olddecl
) == TYPE_DECL
1728 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1729 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1732 /* If new decl is `static' and an `extern' was seen previously,
1734 warn_extern_redeclared_static (newdecl
, olddecl
);
1736 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1737 return error_mark_node
;
1739 /* We have committed to returning 1 at this point. */
1740 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1742 /* Now that functions must hold information normally held
1743 by field decls, there is extra work to do so that
1744 declaration information does not get destroyed during
1746 if (DECL_VINDEX (olddecl
))
1747 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1748 if (DECL_CONTEXT (olddecl
))
1749 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1750 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1751 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1752 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1753 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1754 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1755 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1756 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1757 SET_OVERLOADED_OPERATOR_CODE
1758 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1759 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1761 /* Optionally warn about more than one declaration for the same
1762 name, but don't warn about a function declaration followed by a
1764 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1765 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1766 /* Don't warn about extern decl followed by definition. */
1767 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1768 /* Don't warn about friends, let add_friend take care of it. */
1769 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1770 /* Don't warn about declaration followed by specialization. */
1771 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1772 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1774 if (warning (OPT_Wredundant_decls
,
1775 "redundant redeclaration of %qD in same scope",
1777 inform (input_location
, "previous declaration of %q+D", olddecl
);
1780 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1781 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1783 if (DECL_DELETED_FN (newdecl
))
1785 error ("deleted definition of %qD", newdecl
);
1786 error ("after previous declaration %q+D", olddecl
);
1788 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1792 /* Deal with C++: must preserve virtual function table size. */
1793 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1795 tree newtype
= TREE_TYPE (newdecl
);
1796 tree oldtype
= TREE_TYPE (olddecl
);
1798 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1799 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1800 CLASSTYPE_FRIEND_CLASSES (newtype
)
1801 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1803 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1806 /* Copy all the DECL_... slots specified in the new decl
1807 except for any that we copy here from the old type. */
1808 DECL_ATTRIBUTES (newdecl
)
1809 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1811 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1815 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1816 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1817 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1818 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1819 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1820 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1822 DECL_ATTRIBUTES (old_result
)
1823 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1825 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1827 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1828 && DECL_INITIAL (new_result
))
1830 if (DECL_INITIAL (old_result
))
1831 DECL_UNINLINABLE (old_result
) = 1;
1833 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1834 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1835 DECL_NOT_REALLY_EXTERN (old_result
)
1836 = DECL_NOT_REALLY_EXTERN (new_result
);
1837 DECL_INTERFACE_KNOWN (old_result
)
1838 = DECL_INTERFACE_KNOWN (new_result
);
1839 DECL_DECLARED_INLINE_P (old_result
)
1840 = DECL_DECLARED_INLINE_P (new_result
);
1841 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1842 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1847 DECL_DECLARED_INLINE_P (old_result
)
1848 |= DECL_DECLARED_INLINE_P (new_result
);
1849 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1850 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1851 check_redeclaration_exception_specification (newdecl
, olddecl
);
1855 /* If the new declaration is a definition, update the file and
1856 line information on the declaration, and also make
1857 the old declaration the same definition. */
1858 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1860 DECL_SOURCE_LOCATION (olddecl
)
1861 = DECL_SOURCE_LOCATION (old_result
)
1862 = DECL_SOURCE_LOCATION (newdecl
);
1863 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1864 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1867 DECL_ARGUMENTS (old_result
)
1868 = DECL_ARGUMENTS (new_result
);
1869 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1870 parm
= DECL_CHAIN (parm
))
1871 DECL_CONTEXT (parm
) = old_result
;
1880 /* Automatically handles default parameters. */
1881 tree oldtype
= TREE_TYPE (olddecl
);
1884 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1885 maybe_instantiate_noexcept (olddecl
);
1887 /* Merge the data types specified in the two decls. */
1888 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1890 /* If merge_types produces a non-typedef type, just use the old type. */
1891 if (TREE_CODE (newdecl
) == TYPE_DECL
1892 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1895 if (VAR_P (newdecl
))
1897 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1898 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1899 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1900 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1901 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1902 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1904 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1905 if (DECL_LANG_SPECIFIC (olddecl
)
1906 && CP_DECL_THREADPRIVATE_P (olddecl
))
1908 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1909 if (!DECL_LANG_SPECIFIC (newdecl
))
1910 retrofit_lang_decl (newdecl
);
1912 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1913 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1917 /* Do this after calling `merge_types' so that default
1918 parameters don't confuse us. */
1919 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1920 check_redeclaration_exception_specification (newdecl
, olddecl
);
1921 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1923 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1924 check_default_args (newdecl
);
1926 /* Lay the type out, unless already done. */
1927 if (! same_type_p (newtype
, oldtype
)
1928 && TREE_TYPE (newdecl
) != error_mark_node
1929 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1930 layout_type (TREE_TYPE (newdecl
));
1932 if ((VAR_P (newdecl
)
1933 || TREE_CODE (newdecl
) == PARM_DECL
1934 || TREE_CODE (newdecl
) == RESULT_DECL
1935 || TREE_CODE (newdecl
) == FIELD_DECL
1936 || TREE_CODE (newdecl
) == TYPE_DECL
)
1937 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1938 layout_decl (newdecl
, 0);
1940 /* Merge the type qualifiers. */
1941 if (TREE_READONLY (newdecl
))
1942 TREE_READONLY (olddecl
) = 1;
1943 if (TREE_THIS_VOLATILE (newdecl
))
1944 TREE_THIS_VOLATILE (olddecl
) = 1;
1945 if (TREE_NOTHROW (newdecl
))
1946 TREE_NOTHROW (olddecl
) = 1;
1948 /* Merge deprecatedness. */
1949 if (TREE_DEPRECATED (newdecl
))
1950 TREE_DEPRECATED (olddecl
) = 1;
1952 /* Preserve function specific target and optimization options */
1953 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1955 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1956 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1957 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1958 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1960 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1961 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1962 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1963 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1966 /* Merge the initialization information. */
1967 if (DECL_INITIAL (newdecl
) == NULL_TREE
1968 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1970 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1971 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1972 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1974 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1975 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1979 /* Merge the section attribute.
1980 We want to issue an error if the sections conflict but that must be
1981 done later in decl_attributes since we are called before attributes
1983 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1984 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1986 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1988 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1989 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1990 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1991 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1992 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1993 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1994 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1995 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1996 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1997 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1998 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1999 /* Keep the old RTL. */
2000 COPY_DECL_RTL (olddecl
, newdecl
);
2002 else if (VAR_P (newdecl
)
2003 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2005 /* Keep the old RTL. We cannot keep the old RTL if the old
2006 declaration was for an incomplete object and the new
2007 declaration is not since many attributes of the RTL will
2009 COPY_DECL_RTL (olddecl
, newdecl
);
2012 /* If cannot merge, then use the new type and qualifiers,
2013 and don't preserve the old rtl. */
2016 /* Clean out any memory we had of the old declaration. */
2017 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2019 TREE_VALUE (oldstatic
) = error_mark_node
;
2021 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2022 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2023 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2024 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2027 /* Merge the storage class information. */
2028 merge_weak (newdecl
, olddecl
);
2030 if (DECL_ONE_ONLY (olddecl
))
2031 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2033 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2034 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2035 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2036 if (! DECL_EXTERNAL (olddecl
))
2037 DECL_EXTERNAL (newdecl
) = 0;
2039 new_template_info
= NULL_TREE
;
2040 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2042 bool new_redefines_gnu_inline
= false;
2044 if (new_defines_function
2045 && ((DECL_INTERFACE_KNOWN (olddecl
)
2046 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2047 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2048 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2049 == FUNCTION_DECL
))))
2053 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2054 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2056 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2059 if (!new_redefines_gnu_inline
)
2061 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2062 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2063 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2065 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2066 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2067 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2069 /* If the OLDDECL is an instantiation and/or specialization,
2070 then the NEWDECL must be too. But, it may not yet be marked
2071 as such if the caller has created NEWDECL, but has not yet
2072 figured out that it is a redeclaration. */
2073 if (!DECL_USE_TEMPLATE (newdecl
))
2074 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2076 /* Don't really know how much of the language-specific
2077 values we should copy from old to new. */
2078 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2079 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2080 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2081 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2083 if (LANG_DECL_HAS_MIN (newdecl
))
2085 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2086 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2087 if (DECL_TEMPLATE_INFO (newdecl
))
2088 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2089 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2091 /* Only functions have these fields. */
2092 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2094 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2095 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2096 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2097 && DECL_HIDDEN_FRIEND_P (olddecl
)
2098 && newdecl_is_friend
);
2099 DECL_BEFRIENDING_CLASSES (newdecl
)
2100 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2101 DECL_BEFRIENDING_CLASSES (olddecl
));
2102 /* DECL_THUNKS is only valid for virtual functions,
2103 otherwise it is a DECL_FRIEND_CONTEXT. */
2104 if (DECL_VIRTUAL_P (newdecl
))
2105 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2107 /* Only variables have this field. */
2108 else if (VAR_P (newdecl
)
2109 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2110 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2113 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2117 /* Merge parameter attributes. */
2118 tree oldarg
, newarg
;
2119 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2120 newarg
= DECL_ARGUMENTS(newdecl
);
2122 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2123 DECL_ATTRIBUTES (newarg
)
2124 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2125 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2128 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2129 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2131 /* If newdecl is not a specialization, then it is not a
2132 template-related function at all. And that means that we
2133 should have exited above, returning 0. */
2134 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2136 if (DECL_ODR_USED (olddecl
))
2137 /* From [temp.expl.spec]:
2139 If a template, a member template or the member of a class
2140 template is explicitly specialized then that
2141 specialization shall be declared before the first use of
2142 that specialization that would cause an implicit
2143 instantiation to take place, in every translation unit in
2144 which such a use occurs. */
2145 error ("explicit specialization of %qD after first use",
2148 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2150 /* Don't propagate visibility from the template to the
2151 specialization here. We'll do that in determine_visibility if
2153 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2155 /* [temp.expl.spec/14] We don't inline explicit specialization
2156 just because the primary template says so. */
2158 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2159 the always_inline attribute. */
2160 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2161 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2163 if (DECL_DECLARED_INLINE_P (newdecl
))
2164 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2166 DECL_ATTRIBUTES (newdecl
)
2167 = remove_attribute ("always_inline",
2168 DECL_ATTRIBUTES (newdecl
));
2171 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2173 /* Never inline re-defined extern inline functions.
2174 FIXME: this could be better handled by keeping both
2175 function as separate declarations. */
2176 DECL_UNINLINABLE (newdecl
) = 1;
2180 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2181 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2183 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2185 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2186 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2188 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2189 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2190 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2191 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2194 /* Preserve abstractness on cloned [cd]tors. */
2195 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2197 /* Update newdecl's parms to point at olddecl. */
2198 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2199 parm
= DECL_CHAIN (parm
))
2200 DECL_CONTEXT (parm
) = olddecl
;
2204 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2205 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2206 COPY_DECL_RTL (newdecl
, olddecl
);
2208 if (! types_match
|| new_defines_function
)
2210 /* These need to be copied so that the names are available.
2211 Note that if the types do match, we'll preserve inline
2212 info and other bits, but if not, we won't. */
2213 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2214 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2216 /* If redeclaring a builtin function, it stays built in
2217 if newdecl is a gnu_inline definition, or if newdecl is just
2219 if (DECL_BUILT_IN (olddecl
)
2220 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2222 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2223 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2224 /* If we're keeping the built-in definition, keep the rtl,
2225 regardless of declaration matches. */
2226 COPY_DECL_RTL (olddecl
, newdecl
);
2227 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2229 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2232 /* If a compatible prototype of these builtin functions
2233 is seen, assume the runtime implements it with the
2234 expected semantics. */
2235 case BUILT_IN_STPCPY
:
2236 if (builtin_decl_explicit_p (fncode
))
2237 set_builtin_decl_implicit_p (fncode
, true);
2244 if (new_defines_function
)
2245 /* If defining a function declared with other language
2246 linkage, use the previously declared language linkage. */
2247 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2248 else if (types_match
)
2250 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2251 /* Don't clear out the arguments if we're just redeclaring a
2253 if (DECL_ARGUMENTS (olddecl
))
2254 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2257 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2258 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2260 /* Now preserve various other info from the definition. */
2261 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2262 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2263 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2264 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2266 /* Warn about conflicting visibility specifications. */
2267 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2268 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2269 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2271 warning_at (input_location
, OPT_Wattributes
,
2272 "%q+D: visibility attribute ignored because it", newdecl
);
2273 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2274 "conflicts with previous declaration here");
2276 /* Choose the declaration which specified visibility. */
2277 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2279 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2280 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2282 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2283 so keep this behavior. */
2284 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2286 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2287 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2289 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2290 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2292 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2293 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2295 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2296 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2297 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2299 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2300 with that from NEWDECL below. */
2301 if (DECL_LANG_SPECIFIC (olddecl
))
2303 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2304 != DECL_LANG_SPECIFIC (newdecl
));
2305 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2308 /* Merge the USED information. */
2309 if (TREE_USED (olddecl
))
2310 TREE_USED (newdecl
) = 1;
2311 else if (TREE_USED (newdecl
))
2312 TREE_USED (olddecl
) = 1;
2313 if (VAR_P (newdecl
))
2315 if (DECL_READ_P (olddecl
))
2316 DECL_READ_P (newdecl
) = 1;
2317 else if (DECL_READ_P (newdecl
))
2318 DECL_READ_P (olddecl
) = 1;
2320 if (DECL_PRESERVE_P (olddecl
))
2321 DECL_PRESERVE_P (newdecl
) = 1;
2322 else if (DECL_PRESERVE_P (newdecl
))
2323 DECL_PRESERVE_P (olddecl
) = 1;
2325 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2326 to olddecl and deleted. */
2327 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2328 && DECL_FUNCTION_VERSIONED (olddecl
))
2330 /* Set the flag for newdecl so that it gets copied to olddecl. */
2331 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2332 /* newdecl will be purged after copying to olddecl and is no longer
2334 delete_function_version (newdecl
);
2337 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2341 function_size
= sizeof (struct tree_decl_common
);
2343 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2344 (char *) newdecl
+ sizeof (struct tree_common
),
2345 function_size
- sizeof (struct tree_common
));
2347 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2348 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2349 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2350 if (new_template_info
)
2351 /* If newdecl is a template instantiation, it is possible that
2352 the following sequence of events has occurred:
2354 o A friend function was declared in a class template. The
2355 class template was instantiated.
2357 o The instantiation of the friend declaration was
2358 recorded on the instantiation list, and is newdecl.
2360 o Later, however, instantiate_class_template called pushdecl
2361 on the newdecl to perform name injection. But, pushdecl in
2362 turn called duplicate_decls when it discovered that another
2363 declaration of a global function with the same name already
2366 o Here, in duplicate_decls, we decided to clobber newdecl.
2368 If we're going to do that, we'd better make sure that
2369 olddecl, and not newdecl, is on the list of
2370 instantiations so that if we try to do the instantiation
2371 again we won't get the clobbered declaration. */
2372 reregister_specialization (newdecl
,
2378 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2379 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2380 (char *) newdecl
+ sizeof (struct tree_common
),
2381 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2382 switch (TREE_CODE (olddecl
))
2392 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2393 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2394 size
- sizeof (struct tree_decl_common
)
2395 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2399 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2400 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2401 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2402 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2406 DECL_UID (olddecl
) = olddecl_uid
;
2408 DECL_FRIEND_P (olddecl
) = 1;
2411 DECL_ANTICIPATED (olddecl
) = 1;
2412 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2415 /* NEWDECL contains the merged attribute lists.
2416 Update OLDDECL to be the same. */
2417 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2419 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2420 so that encode_section_info has a chance to look at the new decl
2421 flags and attributes. */
2422 if (DECL_RTL_SET_P (olddecl
)
2423 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2425 && TREE_STATIC (olddecl
))))
2426 make_decl_rtl (olddecl
);
2428 /* The NEWDECL will no longer be needed. Because every out-of-class
2429 declaration of a member results in a call to duplicate_decls,
2430 freeing these nodes represents in a significant savings. */
2436 /* Return zero if the declaration NEWDECL is valid
2437 when the declaration OLDDECL (assumed to be for the same name)
2438 has already been seen.
2439 Otherwise return an error message format string with a %s
2440 where the identifier should go. */
2443 redeclaration_error_message (tree newdecl
, tree olddecl
)
2445 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2447 /* Because C++ can put things into name space for free,
2448 constructs like "typedef struct foo { ... } foo"
2449 would look like an erroneous redeclaration. */
2450 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2453 return G_("redefinition of %q#D");
2455 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2457 /* If this is a pure function, its olddecl will actually be
2458 the original initialization to `0' (which we force to call
2459 abort()). Don't complain about redefinition in this case. */
2460 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2461 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2464 /* If both functions come from different namespaces, this is not
2465 a redeclaration - this is a conflict with a used function. */
2466 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2467 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2468 && ! decls_match (olddecl
, newdecl
))
2469 return G_("%qD conflicts with used function");
2471 /* We'll complain about linkage mismatches in
2472 warn_extern_redeclared_static. */
2474 /* Defining the same name twice is no good. */
2475 if (DECL_INITIAL (olddecl
) != NULL_TREE
2476 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2478 if (DECL_NAME (olddecl
) == NULL_TREE
)
2479 return G_("%q#D not declared in class");
2480 else if (!GNU_INLINE_P (olddecl
)
2481 || GNU_INLINE_P (newdecl
))
2482 return G_("redefinition of %q#D");
2485 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2487 bool olda
= GNU_INLINE_P (olddecl
);
2488 bool newa
= GNU_INLINE_P (newdecl
);
2493 return G_("%q+D redeclared inline with "
2494 "%<gnu_inline%> attribute");
2496 return G_("%q+D redeclared inline without "
2497 "%<gnu_inline%> attribute");
2501 check_abi_tag_redeclaration
2502 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2503 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2507 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2511 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2513 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2514 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2515 return G_("redefinition of %q#D");
2519 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2520 || (DECL_TEMPLATE_RESULT (newdecl
)
2521 == DECL_TEMPLATE_RESULT (olddecl
)))
2524 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2525 if (DECL_TEMPLATE_INFO (nt
))
2526 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2527 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2528 if (DECL_TEMPLATE_INFO (ot
))
2529 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2530 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2531 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2532 return G_("redefinition of %q#D");
2534 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2536 bool olda
= GNU_INLINE_P (ot
);
2537 bool newa
= GNU_INLINE_P (nt
);
2542 return G_("%q+D redeclared inline with "
2543 "%<gnu_inline%> attribute");
2545 return G_("%q+D redeclared inline without "
2546 "%<gnu_inline%> attribute");
2550 /* Core issue #226 (C++0x):
2552 If a friend function template declaration specifies a
2553 default template-argument, that declaration shall be a
2554 definition and shall be the only declaration of the
2555 function template in the translation unit. */
2556 if ((cxx_dialect
!= cxx98
)
2557 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2558 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2559 /*is_primary=*/true,
2560 /*is_partial=*/false,
2561 /*is_friend_decl=*/2))
2562 return G_("redeclaration of friend %q#D "
2563 "may not have default template arguments");
2567 else if (VAR_P (newdecl
)
2568 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2569 && (! DECL_LANG_SPECIFIC (olddecl
)
2570 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2571 || DECL_THREAD_LOCAL_P (newdecl
)))
2573 /* Only variables can be thread-local, and all declarations must
2574 agree on this property. */
2575 if (DECL_THREAD_LOCAL_P (newdecl
))
2576 return G_("thread-local declaration of %q#D follows "
2577 "non-thread-local declaration");
2579 return G_("non-thread-local declaration of %q#D follows "
2580 "thread-local declaration");
2582 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2584 /* The objects have been declared at namespace scope. If either
2585 is a member of an anonymous union, then this is an invalid
2586 redeclaration. For example:
2592 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2593 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2594 return G_("redeclaration of %q#D");
2595 /* If at least one declaration is a reference, there is no
2596 conflict. For example:
2602 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2604 /* Reject two definitions. */
2605 return G_("redefinition of %q#D");
2609 /* Objects declared with block scope: */
2610 /* Reject two definitions, and reject a definition
2611 together with an external reference. */
2612 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2613 return G_("redeclaration of %q#D");
2618 /* Hash and equality functions for the named_label table. */
2621 named_label_entry_hash (const void *data
)
2623 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2624 return DECL_UID (ent
->label_decl
);
2628 named_label_entry_eq (const void *a
, const void *b
)
2630 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2631 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2632 return ent_a
->label_decl
== ent_b
->label_decl
;
2635 /* Create a new label, named ID. */
2638 make_label_decl (tree id
, int local_p
)
2640 struct named_label_entry
*ent
;
2644 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2646 DECL_CONTEXT (decl
) = current_function_decl
;
2647 DECL_MODE (decl
) = VOIDmode
;
2648 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2650 /* Say where one reference is to the label, for the sake of the
2651 error if it is not defined. */
2652 DECL_SOURCE_LOCATION (decl
) = input_location
;
2654 /* Record the fact that this identifier is bound to this label. */
2655 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2657 /* Create the label htab for the function on demand. */
2659 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2660 named_label_entry_eq
, NULL
);
2662 /* Record this label on the list of labels used in this function.
2663 We do this before calling make_label_decl so that we get the
2664 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2665 ent
= ggc_alloc_cleared_named_label_entry ();
2666 ent
->label_decl
= decl
;
2668 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2669 gcc_assert (*slot
== NULL
);
2675 /* Look for a label named ID in the current function. If one cannot
2676 be found, create one. (We keep track of used, but undefined,
2677 labels, and complain about them at the end of a function.) */
2680 lookup_label_1 (tree id
)
2684 /* You can't use labels at global scope. */
2685 if (current_function_decl
== NULL_TREE
)
2687 error ("label %qE referenced outside of any function", id
);
2691 /* See if we've already got this label. */
2692 decl
= IDENTIFIER_LABEL_VALUE (id
);
2693 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2696 decl
= make_label_decl (id
, /*local_p=*/0);
2700 /* Wrapper for lookup_label_1. */
2703 lookup_label (tree id
)
2706 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2707 ret
= lookup_label_1 (id
);
2708 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2712 /* Declare a local label named ID. */
2715 declare_local_label (tree id
)
2718 cp_label_binding bind
;
2720 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2721 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2722 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2724 decl
= make_label_decl (id
, /*local_p=*/1);
2726 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2731 /* Returns nonzero if it is ill-formed to jump past the declaration of
2732 DECL. Returns 2 if it's also a real problem. */
2735 decl_jump_unsafe (tree decl
)
2737 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2738 with automatic storage duration is not in scope to a point where it is
2739 in scope is ill-formed unless the variable has scalar type, class type
2740 with a trivial default constructor and a trivial destructor, a
2741 cv-qualified version of one of these types, or an array of one of the
2742 preceding types and is declared without an initializer (8.5). */
2743 tree type
= TREE_TYPE (decl
);
2745 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2746 || type
== error_mark_node
)
2749 type
= strip_array_types (type
);
2751 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2754 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2760 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2763 identify_goto (tree decl
, const location_t
*locus
)
2766 permerror (input_location
, "jump to label %qD", decl
);
2768 permerror (input_location
, "jump to case label");
2770 permerror (*locus
, " from here");
2773 /* Check that a single previously seen jump to a newly defined label
2774 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2775 the jump context; NAMES are the names in scope in LEVEL at the jump
2776 context; LOCUS is the source position of the jump or 0. Returns
2777 true if all is well. */
2780 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2781 bool exited_omp
, const location_t
*locus
)
2783 cp_binding_level
*b
;
2784 bool identified
= false, saw_eh
= false, saw_omp
= false;
2788 identify_goto (decl
, locus
);
2789 error (" exits OpenMP structured block");
2790 identified
= saw_omp
= true;
2793 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2795 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2797 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2798 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2799 : TREE_CHAIN (new_decls
)))
2801 int problem
= decl_jump_unsafe (new_decls
);
2807 identify_goto (decl
, locus
);
2811 error (" crosses initialization of %q+#D", new_decls
);
2813 permerror (input_location
, " enters scope of %q+#D which has "
2814 "non-trivial destructor", new_decls
);
2819 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2823 identify_goto (decl
, locus
);
2826 if (b
->kind
== sk_try
)
2827 error (" enters try block");
2829 error (" enters catch block");
2832 if (b
->kind
== sk_omp
&& !saw_omp
)
2836 identify_goto (decl
, locus
);
2839 error (" enters OpenMP structured block");
2848 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2850 check_previous_goto_1 (decl
, use
->binding_level
,
2851 use
->names_in_scope
, use
->in_omp_scope
,
2852 &use
->o_goto_locus
);
2856 check_switch_goto (cp_binding_level
* level
)
2858 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2861 /* Check that a new jump to a label DECL is OK. Called by
2862 finish_goto_stmt. */
2865 check_goto (tree decl
)
2867 struct named_label_entry
*ent
, dummy
;
2868 bool saw_catch
= false, identified
= false;
2872 /* We can't know where a computed goto is jumping.
2873 So we assume that it's OK. */
2874 if (TREE_CODE (decl
) != LABEL_DECL
)
2877 /* We didn't record any information about this label when we created it,
2878 and there's not much point since it's trivial to analyze as a return. */
2879 if (decl
== cdtor_label
)
2882 dummy
.label_decl
= decl
;
2883 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2884 gcc_assert (ent
!= NULL
);
2886 /* If the label hasn't been defined yet, defer checking. */
2887 if (! DECL_INITIAL (decl
))
2889 struct named_label_use_entry
*new_use
;
2891 /* Don't bother creating another use if the last goto had the
2892 same data, and will therefore create the same set of errors. */
2894 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2897 new_use
= ggc_alloc_named_label_use_entry ();
2898 new_use
->binding_level
= current_binding_level
;
2899 new_use
->names_in_scope
= current_binding_level
->names
;
2900 new_use
->o_goto_locus
= input_location
;
2901 new_use
->in_omp_scope
= false;
2903 new_use
->next
= ent
->uses
;
2904 ent
->uses
= new_use
;
2908 if (ent
->in_try_scope
|| ent
->in_catch_scope
2909 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2911 permerror (input_location
, "jump to label %q+D", decl
);
2912 permerror (input_location
, " from here");
2916 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2918 int u
= decl_jump_unsafe (bad
);
2920 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2922 /* Can't skip init of __exception_info. */
2923 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2927 error (" skips initialization of %q+#D", bad
);
2929 permerror (input_location
, " enters scope of %q+#D which has "
2930 "non-trivial destructor", bad
);
2933 if (ent
->in_try_scope
)
2934 error (" enters try block");
2935 else if (ent
->in_catch_scope
&& !saw_catch
)
2936 error (" enters catch block");
2938 if (ent
->in_omp_scope
)
2939 error (" enters OpenMP structured block");
2940 else if (flag_openmp
)
2942 cp_binding_level
*b
;
2943 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2945 if (b
== ent
->binding_level
)
2947 if (b
->kind
== sk_omp
)
2951 permerror (input_location
, "jump to label %q+D", decl
);
2952 permerror (input_location
, " from here");
2955 error (" exits OpenMP structured block");
2962 /* Check that a return is ok wrt OpenMP structured blocks.
2963 Called by finish_return_stmt. Returns true if all is well. */
2966 check_omp_return (void)
2968 cp_binding_level
*b
;
2969 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2970 if (b
->kind
== sk_omp
)
2972 error ("invalid exit from OpenMP structured block");
2975 else if (b
->kind
== sk_function_parms
)
2980 /* Define a label, specifying the location in the source file.
2981 Return the LABEL_DECL node for the label. */
2984 define_label_1 (location_t location
, tree name
)
2986 struct named_label_entry
*ent
, dummy
;
2987 cp_binding_level
*p
;
2990 decl
= lookup_label (name
);
2992 dummy
.label_decl
= decl
;
2993 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2994 gcc_assert (ent
!= NULL
);
2996 /* After labels, make any new cleanups in the function go into their
2997 own new (temporary) binding contour. */
2998 for (p
= current_binding_level
;
2999 p
->kind
!= sk_function_parms
;
3001 p
->more_cleanups_ok
= 0;
3003 if (name
== get_identifier ("wchar_t"))
3004 permerror (input_location
, "label named wchar_t");
3006 if (DECL_INITIAL (decl
) != NULL_TREE
)
3008 error ("duplicate label %qD", decl
);
3009 return error_mark_node
;
3013 struct named_label_use_entry
*use
;
3015 /* Mark label as having been defined. */
3016 DECL_INITIAL (decl
) = error_mark_node
;
3017 /* Say where in the source. */
3018 DECL_SOURCE_LOCATION (decl
) = location
;
3020 ent
->binding_level
= current_binding_level
;
3021 ent
->names_in_scope
= current_binding_level
->names
;
3023 for (use
= ent
->uses
; use
; use
= use
->next
)
3024 check_previous_goto (decl
, use
);
3031 /* Wrapper for define_label_1. */
3034 define_label (location_t location
, tree name
)
3037 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3038 ret
= define_label_1 (location
, name
);
3039 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3046 cp_binding_level
*level
;
3047 struct cp_switch
*next
;
3048 /* The SWITCH_STMT being built. */
3050 /* A splay-tree mapping the low element of a case range to the high
3051 element, or NULL_TREE if there is no high element. Used to
3052 determine whether or not a new case label duplicates an old case
3053 label. We need a tree, rather than simply a hash table, because
3054 of the GNU case range extension. */
3058 /* A stack of the currently active switch statements. The innermost
3059 switch statement is on the top of the stack. There is no need to
3060 mark the stack for garbage collection because it is only active
3061 during the processing of the body of a function, and we never
3062 collect at that point. */
3064 static struct cp_switch
*switch_stack
;
3066 /* Called right after a switch-statement condition is parsed.
3067 SWITCH_STMT is the switch statement being parsed. */
3070 push_switch (tree switch_stmt
)
3072 struct cp_switch
*p
= XNEW (struct cp_switch
);
3073 p
->level
= current_binding_level
;
3074 p
->next
= switch_stack
;
3075 p
->switch_stmt
= switch_stmt
;
3076 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3083 struct cp_switch
*cs
= switch_stack
;
3084 location_t switch_location
;
3086 /* Emit warnings as needed. */
3087 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3088 if (!processing_template_decl
)
3089 c_do_switch_warnings (cs
->cases
, switch_location
,
3090 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3091 SWITCH_STMT_COND (cs
->switch_stmt
));
3093 splay_tree_delete (cs
->cases
);
3094 switch_stack
= switch_stack
->next
;
3098 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3099 condition. Note that if TYPE and VALUE are already integral we don't
3100 really do the conversion because the language-independent
3101 warning/optimization code will work better that way. */
3104 case_conversion (tree type
, tree value
)
3106 if (value
== NULL_TREE
)
3109 if (cxx_dialect
>= cxx11
3110 && (SCOPED_ENUM_P (type
)
3111 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3113 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3114 type
= type_promotes_to (type
);
3115 value
= (perform_implicit_conversion_flags
3116 (type
, value
, tf_warning_or_error
,
3117 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3119 return cxx_constant_value (value
);
3122 /* Note that we've seen a definition of a case label, and complain if this
3123 is a bad place for one. */
3126 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3129 cp_binding_level
*p
;
3132 if (processing_template_decl
)
3136 /* For templates, just add the case label; we'll do semantic
3137 analysis at instantiation-time. */
3138 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3139 return add_stmt (build_case_label (low_value
, high_value
, label
));
3142 /* Find the condition on which this switch statement depends. */
3143 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3144 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3145 cond
= TREE_VALUE (cond
);
3147 if (!check_switch_goto (switch_stack
->level
))
3148 return error_mark_node
;
3150 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3152 low_value
= case_conversion (type
, low_value
);
3153 high_value
= case_conversion (type
, high_value
);
3155 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3156 low_value
, high_value
);
3158 /* After labels, make any new cleanups in the function go into their
3159 own new (temporary) binding contour. */
3160 for (p
= current_binding_level
;
3161 p
->kind
!= sk_function_parms
;
3163 p
->more_cleanups_ok
= 0;
3168 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3171 typename_hash (const void* k
)
3174 const_tree
const t
= (const_tree
) k
;
3176 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3177 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3182 typedef struct typename_info
{
3190 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3191 really of type `typename_info*' */
3194 typename_compare (const void * k1
, const void * k2
)
3196 const_tree
const t1
= (const_tree
) k1
;
3197 const typename_info
*const t2
= (const typename_info
*) k2
;
3199 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3200 && TYPE_CONTEXT (t1
) == t2
->scope
3201 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3202 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3203 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3206 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3207 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3209 Returns the new TYPENAME_TYPE. */
3211 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3214 build_typename_type (tree context
, tree name
, tree fullname
,
3215 enum tag_types tag_type
)
3223 if (typename_htab
== NULL
)
3224 typename_htab
= htab_create_ggc (61, &typename_hash
,
3225 &typename_compare
, NULL
);
3227 ti
.scope
= FROB_CONTEXT (context
);
3229 ti
.template_id
= fullname
;
3230 ti
.enum_p
= tag_type
== enum_type
;
3231 ti
.class_p
= (tag_type
== class_type
3232 || tag_type
== record_type
3233 || tag_type
== union_type
);
3234 hash
= (htab_hash_pointer (ti
.scope
)
3235 ^ htab_hash_pointer (ti
.name
));
3237 /* See if we already have this type. */
3238 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3243 /* Build the TYPENAME_TYPE. */
3244 t
= cxx_make_type (TYPENAME_TYPE
);
3245 TYPE_CONTEXT (t
) = ti
.scope
;
3246 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3247 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3248 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3250 /* Build the corresponding TYPE_DECL. */
3251 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3252 TYPE_NAME (TREE_TYPE (d
)) = d
;
3253 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3254 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3255 DECL_ARTIFICIAL (d
) = 1;
3257 /* Store it in the hash table. */
3260 /* TYPENAME_TYPEs must always be compared structurally, because
3261 they may or may not resolve down to another type depending on
3262 the currently open classes. */
3263 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3269 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3270 provided to name the type. Returns an appropriate type, unless an
3271 error occurs, in which case error_mark_node is returned. If we
3272 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3273 return that, rather than the _TYPE it corresponds to, in other
3274 cases we look through the type decl. If TF_ERROR is set, complain
3275 about errors, otherwise be quiet. */
3278 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3279 tsubst_flags_t complain
)
3285 if (name
== error_mark_node
3286 || context
== NULL_TREE
3287 || context
== error_mark_node
)
3288 return error_mark_node
;
3292 if (!(TYPE_LANG_SPECIFIC (name
)
3293 && (CLASSTYPE_IS_TEMPLATE (name
)
3294 || CLASSTYPE_USE_TEMPLATE (name
))))
3295 name
= TYPE_IDENTIFIER (name
);
3297 /* Create a TEMPLATE_ID_EXPR for the type. */
3298 name
= build_nt (TEMPLATE_ID_EXPR
,
3299 CLASSTYPE_TI_TEMPLATE (name
),
3300 CLASSTYPE_TI_ARGS (name
));
3302 else if (TREE_CODE (name
) == TYPE_DECL
)
3303 name
= DECL_NAME (name
);
3307 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3309 name
= TREE_OPERAND (name
, 0);
3310 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3311 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3312 else if (TREE_CODE (name
) == OVERLOAD
)
3314 if (complain
& tf_error
)
3315 error ("%qD is not a type", name
);
3316 return error_mark_node
;
3319 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3321 if (complain
& tf_error
)
3322 error ("%qD used without template parameters", name
);
3323 return error_mark_node
;
3325 gcc_assert (identifier_p (name
));
3326 gcc_assert (TYPE_P (context
));
3328 if (!MAYBE_CLASS_TYPE_P (context
))
3330 if (complain
& tf_error
)
3331 error ("%q#T is not a class", context
);
3332 return error_mark_node
;
3335 /* When the CONTEXT is a dependent type, NAME could refer to a
3336 dependent base class of CONTEXT. But look inside it anyway
3337 if CONTEXT is a currently open scope, in case it refers to a
3338 member of the current instantiation or a non-dependent base;
3339 lookup will stop when we hit a dependent base. */
3340 if (!dependent_scope_p (context
))
3341 /* We should only set WANT_TYPE when we're a nested typename type.
3342 Then we can give better diagnostics if we find a non-type. */
3343 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3347 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3348 return build_typename_type (context
, name
, fullname
, tag_type
);
3350 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3354 if (complain
& tf_error
)
3355 error (want_template
? G_("no class template named %q#T in %q#T")
3356 : G_("no type named %q#T in %q#T"), name
, context
);
3357 return error_mark_node
;
3360 /* Pull out the template from an injected-class-name (or multiple). */
3362 t
= maybe_get_template_decl_from_type_decl (t
);
3364 if (TREE_CODE (t
) == TREE_LIST
)
3366 if (complain
& tf_error
)
3368 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3369 print_candidates (t
);
3371 return error_mark_node
;
3374 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3376 if (complain
& tf_error
)
3377 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3379 return error_mark_node
;
3381 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3383 if (complain
& tf_error
)
3384 error ("%<typename %T::%D%> names %q#T, which is not a type",
3386 return error_mark_node
;
3389 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3390 return error_mark_node
;
3392 /* If we are currently parsing a template and if T is a typedef accessed
3393 through CONTEXT then we need to remember and check access of T at
3394 template instantiation time. */
3395 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3398 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3400 /*entering_scope=*/0,
3401 tf_warning_or_error
| tf_user
);
3403 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3406 maybe_record_typedef_use (t
);
3411 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3412 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3413 in which case error_mark_node is returned.
3415 If PARM_LIST is non-NULL, also make sure that the template parameter
3416 list of TEMPLATE_DECL matches.
3418 If COMPLAIN zero, don't complain about any errors that occur. */
3421 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3422 tsubst_flags_t complain
)
3428 name
= TYPE_IDENTIFIER (name
);
3429 else if (DECL_P (name
))
3430 name
= DECL_NAME (name
);
3431 gcc_assert (identifier_p (name
));
3433 if (!dependent_type_p (context
)
3434 || currently_open_class (context
))
3436 tree tmpl
= NULL_TREE
;
3438 if (MAYBE_CLASS_TYPE_P (context
))
3439 tmpl
= lookup_field (context
, name
, 0, false);
3441 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3442 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3444 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3446 if (complain
& tf_error
)
3447 error ("no class template named %q#T in %q#T", name
, context
);
3448 return error_mark_node
;
3452 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3454 if (complain
& tf_error
)
3456 error ("template parameters do not match template");
3457 error ("%q+D declared here", tmpl
);
3459 return error_mark_node
;
3462 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3464 return error_mark_node
;
3469 /* Build the UNBOUND_CLASS_TEMPLATE. */
3470 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3471 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3472 TREE_TYPE (t
) = NULL_TREE
;
3473 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3475 /* Build the corresponding TEMPLATE_DECL. */
3476 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3477 TYPE_NAME (TREE_TYPE (d
)) = d
;
3478 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3479 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3480 DECL_ARTIFICIAL (d
) = 1;
3481 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3488 /* Push the declarations of builtin types into the namespace.
3489 RID_INDEX is the index of the builtin type in the array
3490 RID_POINTERS. NAME is the name used when looking up the builtin
3491 type. TYPE is the _TYPE node for the builtin type. */
3494 record_builtin_type (enum rid rid_index
,
3498 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3499 tree tdecl
= NULL_TREE
;
3501 if ((int) rid_index
< (int) RID_MAX
)
3502 rname
= ridpointers
[(int) rid_index
];
3504 tname
= get_identifier (name
);
3506 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3507 eliminated. Built-in types should not be looked up name; their
3508 names are keywords that the parser can recognize. However, there
3509 is code in c-common.c that uses identifier_global_value to look
3510 up built-in types by name. */
3513 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3514 DECL_ARTIFICIAL (tdecl
) = 1;
3515 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3521 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3522 DECL_ARTIFICIAL (tdecl
) = 1;
3524 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3527 if (!TYPE_NAME (type
))
3528 TYPE_NAME (type
) = tdecl
;
3531 debug_hooks
->type_decl (tdecl
, 0);
3534 /* Record one of the standard Java types.
3535 * Declare it as having the given NAME.
3536 * If SIZE > 0, it is the size of one of the integral types;
3537 * otherwise it is the negative of the size of one of the other types. */
3540 record_builtin_java_type (const char* name
, int size
)
3545 type
= build_nonstandard_integer_type (size
, 0);
3546 type
= build_distinct_type_copy (type
);
3548 else if (size
> -32)
3551 /* "__java_char" or ""__java_boolean". */
3552 type
= build_nonstandard_integer_type (-size
, 1);
3553 type
= build_distinct_type_copy (type
);
3554 /* Get the signed type cached and attached to the unsigned type,
3555 so it doesn't get garbage-collected at "random" times,
3556 causing potential codegen differences out of different UIDs
3557 and different alias set numbers. */
3558 stype
= build_nonstandard_integer_type (-size
, 0);
3559 stype
= build_distinct_type_copy (stype
);
3560 TREE_CHAIN (type
) = stype
;
3561 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3564 { /* "__java_float" or ""__java_double". */
3565 type
= make_node (REAL_TYPE
);
3566 TYPE_PRECISION (type
) = - size
;
3569 record_builtin_type (RID_MAX
, name
, type
);
3570 decl
= TYPE_NAME (type
);
3572 /* Suppress generate debug symbol entries for these types,
3573 since for normal C++ they are just clutter.
3574 However, push_lang_context undoes this if extern "Java" is seen. */
3575 DECL_IGNORED_P (decl
) = 1;
3577 TYPE_FOR_JAVA (type
) = 1;
3581 /* Push a type into the namespace so that the back ends ignore it. */
3584 record_unknown_type (tree type
, const char* name
)
3586 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3587 TYPE_DECL
, get_identifier (name
), type
));
3588 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3589 DECL_IGNORED_P (decl
) = 1;
3590 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3591 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3592 TYPE_ALIGN (type
) = 1;
3593 TYPE_USER_ALIGN (type
) = 0;
3594 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3597 /* A string for which we should create an IDENTIFIER_NODE at
3600 typedef struct predefined_identifier
3602 /* The name of the identifier. */
3603 const char *const name
;
3604 /* The place where the IDENTIFIER_NODE should be stored. */
3606 /* Nonzero if this is the name of a constructor or destructor. */
3607 const int ctor_or_dtor_p
;
3608 } predefined_identifier
;
3610 /* Create all the predefined identifiers. */
3613 initialize_predefined_identifiers (void)
3615 const predefined_identifier
*pid
;
3617 /* A table of identifiers to create at startup. */
3618 static const predefined_identifier predefined_identifiers
[] = {
3619 { "C++", &lang_name_cplusplus
, 0 },
3620 { "C", &lang_name_c
, 0 },
3621 { "Java", &lang_name_java
, 0 },
3622 /* Some of these names have a trailing space so that it is
3623 impossible for them to conflict with names written by users. */
3624 { "__ct ", &ctor_identifier
, 1 },
3625 { "__base_ctor ", &base_ctor_identifier
, 1 },
3626 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3627 { "__dt ", &dtor_identifier
, 1 },
3628 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3629 { "__base_dtor ", &base_dtor_identifier
, 1 },
3630 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3631 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3632 { "nelts", &nelts_identifier
, 0 },
3633 { THIS_NAME
, &this_identifier
, 0 },
3634 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3635 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3636 { "_vptr", &vptr_identifier
, 0 },
3637 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3638 { "::", &global_scope_name
, 0 },
3639 { "std", &std_identifier
, 0 },
3643 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3645 *pid
->node
= get_identifier (pid
->name
);
3646 if (pid
->ctor_or_dtor_p
)
3647 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3651 /* Create the predefined scalar types of C,
3652 and some nodes representing standard constants (0, 1, (void *)0).
3653 Initialize the global binding level.
3654 Make definitions for built-in primitive functions. */
3657 cxx_init_decl_processing (void)
3660 tree void_ftype_ptr
;
3662 /* Create all the identifiers we need. */
3663 initialize_predefined_identifiers ();
3665 /* Create the global variables. */
3666 push_to_top_level ();
3668 current_function_decl
= NULL_TREE
;
3669 current_binding_level
= NULL
;
3670 /* Enter the global namespace. */
3671 gcc_assert (global_namespace
== NULL_TREE
);
3672 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3674 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3675 TREE_PUBLIC (global_namespace
) = 1;
3676 begin_scope (sk_namespace
, global_namespace
);
3678 if (flag_visibility_ms_compat
)
3679 default_visibility
= VISIBILITY_HIDDEN
;
3682 current_lang_name
= lang_name_c
;
3684 /* Create the `std' namespace. */
3685 push_namespace (std_identifier
);
3686 std_node
= current_namespace
;
3689 c_common_nodes_and_builtins ();
3691 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3692 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3693 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3694 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3695 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3696 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3697 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3698 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3700 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3702 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3703 truthvalue_type_node
= boolean_type_node
;
3704 truthvalue_false_node
= boolean_false_node
;
3705 truthvalue_true_node
= boolean_true_node
;
3707 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3708 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3709 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3712 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3715 delta_type_node
= ptrdiff_type_node
;
3716 vtable_index_type
= ptrdiff_type_node
;
3718 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3719 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3720 void_ftype_ptr
= build_function_type_list (void_type_node
,
3721 ptr_type_node
, NULL_TREE
);
3723 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3725 /* C++ extensions */
3727 unknown_type_node
= make_node (LANG_TYPE
);
3728 record_unknown_type (unknown_type_node
, "unknown type");
3730 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3731 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3733 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3735 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3736 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3738 init_list_type_node
= make_node (LANG_TYPE
);
3739 record_unknown_type (init_list_type_node
, "init list");
3742 /* Make sure we get a unique function type, so we can give
3743 its pointer type a name. (This wins for gdb.) */
3744 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3745 TREE_TYPE (vfunc_type
) = integer_type_node
;
3746 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3747 layout_type (vfunc_type
);
3749 vtable_entry_type
= build_pointer_type (vfunc_type
);
3751 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3754 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3755 layout_type (vtbl_type_node
);
3756 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3757 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3758 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3759 layout_type (vtbl_ptr_type_node
);
3760 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3762 push_namespace (get_identifier ("__cxxabiv1"));
3763 abi_node
= current_namespace
;
3766 global_type_node
= make_node (LANG_TYPE
);
3767 record_unknown_type (global_type_node
, "global type");
3770 current_lang_name
= lang_name_cplusplus
;
3773 tree newattrs
, extvisattr
;
3774 tree newtype
, deltype
;
3775 tree ptr_ftype_sizetype
;
3779 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3780 if (cxx_dialect
== cxx98
)
3783 tree bad_alloc_type_node
;
3784 tree bad_alloc_decl
;
3786 push_namespace (std_identifier
);
3787 bad_alloc_id
= get_identifier ("bad_alloc");
3788 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3789 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3791 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3792 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3796 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3799 new_eh_spec
= noexcept_false_spec
;
3801 /* Ensure attribs.c is initialized. */
3803 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3805 newattrs
= tree_cons (get_identifier ("alloc_size"),
3806 build_tree_list (NULL_TREE
, integer_one_node
),
3808 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3809 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3810 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3811 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3812 DECL_IS_OPERATOR_NEW (push_cp_library_fn (NEW_EXPR
, newtype
, 0)) = 1;
3813 DECL_IS_OPERATOR_NEW (push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0)) = 1;
3814 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3815 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3817 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3818 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3819 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3820 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3821 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3822 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3823 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3824 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3828 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3829 ECF_NORETURN
| ECF_NOTHROW
);
3831 /* Perform other language dependent initializations. */
3832 init_class_processing ();
3833 init_rtti_processing ();
3834 init_template_processing ();
3836 if (flag_exceptions
)
3837 init_exception_processing ();
3839 if (! supports_one_only ())
3842 make_fname_decl
= cp_make_fname_decl
;
3843 start_fname_decls ();
3845 /* Show we use EH for cleanups. */
3846 if (flag_exceptions
)
3847 using_eh_for_cleanups ();
3850 /* Generate an initializer for a function naming variable from
3851 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3852 filled in with the type of the init. */
3855 cp_fname_init (const char* name
, tree
*type_p
)
3857 tree domain
= NULL_TREE
;
3859 tree init
= NULL_TREE
;
3864 length
= strlen (name
);
3865 domain
= build_index_type (size_int (length
));
3866 init
= build_string (length
+ 1, name
);
3869 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3870 type
= build_cplus_array_type (type
, domain
);
3875 TREE_TYPE (init
) = type
;
3877 init
= error_mark_node
;
3882 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3883 the decl, LOC is the location to give the decl, NAME is the
3884 initialization string and TYPE_DEP indicates whether NAME depended
3885 on the type of the function. We make use of that to detect
3886 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3887 at the point of first use, so we mustn't push the decl now. */
3890 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3892 const char *const name
= (type_dep
&& processing_template_decl
3893 ? NULL
: fname_as_string (type_dep
));
3895 tree init
= cp_fname_init (name
, &type
);
3896 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3899 free (CONST_CAST (char *, name
));
3901 /* As we're using pushdecl_with_scope, we must set the context. */
3902 DECL_CONTEXT (decl
) = current_function_decl
;
3904 TREE_STATIC (decl
) = 1;
3905 TREE_READONLY (decl
) = 1;
3906 DECL_ARTIFICIAL (decl
) = 1;
3908 TREE_USED (decl
) = 1;
3910 if (current_function_decl
)
3912 cp_binding_level
*b
= current_binding_level
;
3913 if (b
->kind
== sk_function_parms
)
3914 return error_mark_node
;
3915 while (b
->level_chain
->kind
!= sk_function_parms
)
3917 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3918 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3919 LOOKUP_ONLYCONVERTING
);
3923 DECL_THIS_STATIC (decl
) = true;
3924 pushdecl_top_level_and_finish (decl
, init
);
3931 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3933 tree id
= DECL_NAME (decl
);
3934 const char *name
= IDENTIFIER_POINTER (id
);
3936 retrofit_lang_decl (decl
);
3938 DECL_ARTIFICIAL (decl
) = 1;
3939 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3940 SET_DECL_LANGUAGE (decl
, lang_c
);
3941 /* Runtime library routines are, by definition, available in an
3942 external shared object. */
3943 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3944 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3946 DECL_CONTEXT (decl
) = context
;
3949 pushdecl_top_level (decl
);
3953 /* A function in the user's namespace should have an explicit
3954 declaration before it is used. Mark the built-in function as
3955 anticipated but not actually declared. */
3956 if (name
[0] != '_' || name
[1] != '_')
3957 DECL_ANTICIPATED (decl
) = 1;
3958 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3960 size_t len
= strlen (name
);
3962 /* Treat __*_chk fortification functions as anticipated as well,
3963 unless they are __builtin_*. */
3964 if (len
> strlen ("___chk")
3965 && memcmp (name
+ len
- strlen ("_chk"),
3966 "_chk", strlen ("_chk") + 1) == 0)
3967 DECL_ANTICIPATED (decl
) = 1;
3974 cxx_builtin_function (tree decl
)
3976 tree id
= DECL_NAME (decl
);
3977 const char *name
= IDENTIFIER_POINTER (id
);
3978 /* All builtins that don't begin with an '_' should additionally
3979 go in the 'std' namespace. */
3982 tree decl2
= copy_node(decl
);
3983 push_namespace (std_identifier
);
3984 builtin_function_1 (decl2
, std_node
, false);
3988 return builtin_function_1 (decl
, NULL_TREE
, false);
3991 /* Like cxx_builtin_function, but guarantee the function is added to the global
3992 scope. This is to allow function specific options to add new machine
3993 dependent builtins when the target ISA changes via attribute((target(...)))
3994 which saves space on program startup if the program does not use non-generic
3998 cxx_builtin_function_ext_scope (tree decl
)
4001 tree id
= DECL_NAME (decl
);
4002 const char *name
= IDENTIFIER_POINTER (id
);
4003 /* All builtins that don't begin with an '_' should additionally
4004 go in the 'std' namespace. */
4007 tree decl2
= copy_node(decl
);
4008 push_namespace (std_identifier
);
4009 builtin_function_1 (decl2
, std_node
, true);
4013 return builtin_function_1 (decl
, NULL_TREE
, true);
4016 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4017 function. Not called directly. */
4020 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4023 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4024 DECL_EXTERNAL (fn
) = 1;
4025 TREE_PUBLIC (fn
) = 1;
4026 DECL_ARTIFICIAL (fn
) = 1;
4027 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4028 SET_DECL_LANGUAGE (fn
, lang_c
);
4029 /* Runtime library routines are, by definition, available in an
4030 external shared object. */
4031 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4032 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4033 set_call_expr_flags (fn
, ecf_flags
);
4037 /* Returns the _DECL for a library function with C++ linkage. */
4040 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4043 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4044 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4045 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4049 /* Like build_library_fn, but takes a C string instead of an
4053 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4055 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4058 /* Like build_cp_library_fn, but takes a C string instead of an
4062 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4064 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4068 /* Like build_library_fn, but also pushes the function so that we will
4069 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4070 may throw exceptions listed in RAISES. */
4073 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4078 type
= build_exception_variant (type
, raises
);
4080 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4081 pushdecl_top_level (fn
);
4085 /* Like build_cp_library_fn, but also pushes the function so that it
4086 will be found by normal lookup. */
4089 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4092 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4097 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4101 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4105 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4107 tree type
= build_function_type (void_type_node
, parmtypes
);
4108 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4111 /* Like push_library_fn, but also note that this function throws
4112 and does not return. Used for __throw_foo and the like. */
4115 push_throw_library_fn (tree name
, tree type
)
4117 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4121 /* When we call finish_struct for an anonymous union, we create
4122 default copy constructors and such. But, an anonymous union
4123 shouldn't have such things; this function undoes the damage to the
4124 anonymous union type T.
4126 (The reason that we create the synthesized methods is that we don't
4127 distinguish `union { int i; }' from `typedef union { int i; } U'.
4128 The first is an anonymous union; the second is just an ordinary
4132 fixup_anonymous_aggr (tree t
)
4136 /* Wipe out memory of synthesized methods. */
4137 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4138 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4139 TYPE_HAS_COPY_CTOR (t
) = 0;
4140 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4141 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4142 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4144 /* Splice the implicitly generated functions out of the TYPE_METHODS
4146 q
= &TYPE_METHODS (t
);
4149 if (DECL_ARTIFICIAL (*q
))
4150 *q
= TREE_CHAIN (*q
);
4152 q
= &DECL_CHAIN (*q
);
4155 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4156 if (TYPE_METHODS (t
))
4158 tree decl
= TYPE_MAIN_DECL (t
);
4160 if (TREE_CODE (t
) != UNION_TYPE
)
4161 error_at (DECL_SOURCE_LOCATION (decl
),
4162 "an anonymous struct cannot have function members");
4164 error_at (DECL_SOURCE_LOCATION (decl
),
4165 "an anonymous union cannot have function members");
4168 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4169 assignment operators (because they cannot have these methods themselves).
4170 For anonymous unions this is already checked because they are not allowed
4171 in any union, otherwise we have to check it. */
4172 if (TREE_CODE (t
) != UNION_TYPE
)
4176 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4177 if (TREE_CODE (field
) == FIELD_DECL
)
4179 type
= TREE_TYPE (field
);
4180 if (CLASS_TYPE_P (type
))
4182 if (TYPE_NEEDS_CONSTRUCTING (type
))
4183 error ("member %q+#D with constructor not allowed "
4184 "in anonymous aggregate", field
);
4185 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4186 error ("member %q+#D with destructor not allowed "
4187 "in anonymous aggregate", field
);
4188 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4189 error ("member %q+#D with copy assignment operator "
4190 "not allowed in anonymous aggregate", field
);
4196 /* Warn for an attribute located at LOCATION that appertains to the
4197 class type CLASS_TYPE that has not been properly placed after its
4198 class-key, in it class-specifier. */
4201 warn_misplaced_attr_for_class_type (source_location location
,
4204 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4206 warning_at (location
, OPT_Wattributes
,
4207 "attribute ignored in declaration "
4208 "of %q#T", class_type
);
4210 "attribute for %q#T must follow the %qs keyword",
4211 class_type
, class_key_or_enum_as_string (class_type
));
4214 /* Make sure that a declaration with no declarator is well-formed, i.e.
4215 just declares a tagged type or anonymous union.
4217 Returns the type declared; or NULL_TREE if none. */
4220 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4221 bool explicit_type_instantiation_p
)
4223 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4224 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4225 /* If a class, struct, or enum type is declared by the DECLSPECS
4226 (i.e, if a class-specifier, enum-specifier, or non-typename
4227 elaborated-type-specifier appears in the DECLSPECS),
4228 DECLARED_TYPE is set to the corresponding type. */
4229 tree declared_type
= NULL_TREE
;
4230 bool error_p
= false;
4232 if (declspecs
->multiple_types_p
)
4233 error ("multiple types in one declaration");
4234 else if (declspecs
->redefined_builtin_type
)
4236 if (!in_system_header
)
4237 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4238 "redeclaration of C++ built-in type %qT",
4239 declspecs
->redefined_builtin_type
);
4244 && TYPE_P (declspecs
->type
)
4245 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4246 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4247 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4248 declared_type
= declspecs
->type
;
4249 else if (declspecs
->type
== error_mark_node
)
4251 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4252 permerror (input_location
, "declaration does not declare anything");
4253 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4255 error ("%<auto%> can only be specified for variables "
4256 "or function declarations");
4257 return error_mark_node
;
4259 /* Check for an anonymous union. */
4260 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4261 && TYPE_ANONYMOUS_P (declared_type
))
4263 /* 7/3 In a simple-declaration, the optional init-declarator-list
4264 can be omitted only when declaring a class (clause 9) or
4265 enumeration (7.2), that is, when the decl-specifier-seq contains
4266 either a class-specifier, an elaborated-type-specifier with
4267 a class-key (9.1), or an enum-specifier. In these cases and
4268 whenever a class-specifier or enum-specifier is present in the
4269 decl-specifier-seq, the identifiers in these specifiers are among
4270 the names being declared by the declaration (as class-name,
4271 enum-names, or enumerators, depending on the syntax). In such
4272 cases, and except for the declaration of an unnamed bit-field (9.6),
4273 the decl-specifier-seq shall introduce one or more names into the
4274 program, or shall redeclare a name introduced by a previous
4275 declaration. [Example:
4276 enum { }; // ill-formed
4277 typedef class { }; // ill-formed
4281 error ("missing type-name in typedef-declaration");
4284 /* Anonymous unions are objects, so they can have specifiers. */;
4285 SET_ANON_AGGR_TYPE_P (declared_type
);
4287 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4288 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4293 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4294 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4295 error ("%qs can only be specified for functions",
4296 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4297 ? "inline" : "virtual");
4299 && (!current_class_type
4300 || current_scope () != current_class_type
))
4301 error ("%<friend%> can only be specified inside a class");
4302 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4303 error ("%<explicit%> can only be specified for constructors");
4304 else if (declspecs
->storage_class
)
4305 error ("a storage class can only be specified for objects "
4307 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4308 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4309 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4310 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4311 error ("qualifiers can only be specified for objects "
4313 else if (saw_typedef
)
4314 warning (0, "%<typedef%> was ignored in this declaration");
4315 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4316 error ("%<constexpr%> cannot be used for type declarations");
4319 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4322 if (!CLASS_TYPE_P (declared_type
)
4323 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4324 /* For a non-template class, use the name location. */
4325 loc
= location_of (declared_type
);
4327 /* For a template class (an explicit instantiation), use the
4328 current location. */
4329 loc
= input_location
;
4331 if (explicit_type_instantiation_p
)
4332 /* [dcl.attr.grammar]/4:
4334 No attribute-specifier-seq shall appertain to an explicit
4337 warning_at (loc
, OPT_Wattributes
,
4338 "attribute ignored in explicit instantiation %q#T",
4341 "no attribute can be applied to "
4342 "an explicit instantiation");
4345 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4348 return declared_type
;
4351 /* Called when a declaration is seen that contains no names to declare.
4352 If its type is a reference to a structure, union or enum inherited
4353 from a containing scope, shadow that tag name for the current scope
4354 with a forward reference.
4355 If its type defines a new named structure or union
4356 or defines an enum, it is valid but we need not do anything here.
4357 Otherwise, it is an error.
4359 C++: may have to grok the declspecs to learn about static,
4360 complain for anonymous unions.
4362 Returns the TYPE declared -- or NULL_TREE if none. */
4365 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4367 tree t
= check_tag_decl (declspecs
,
4368 /*explicit_type_instantiation_p=*/false);
4373 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4376 /* This is where the variables in an anonymous union are
4377 declared. An anonymous union declaration looks like:
4379 because there is no declarator after the union, the parser
4380 sends that declaration here. */
4381 if (ANON_AGGR_TYPE_P (t
))
4383 fixup_anonymous_aggr (t
);
4385 if (TYPE_FIELDS (t
))
4387 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4388 declspecs
, NORMAL
, 0, NULL
);
4389 finish_anon_union (decl
);
4396 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4399 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4400 const cp_declarator
*declarator
,
4401 bool is_template_arg
)
4405 enum decl_context context
4406 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4407 attrs
= type_specifiers
->attributes
;
4408 type_specifiers
->attributes
= NULL_TREE
;
4409 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4410 if (attrs
&& type
!= error_mark_node
)
4412 if (CLASS_TYPE_P (type
))
4413 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4414 "outside of definition", type
);
4415 else if (MAYBE_CLASS_TYPE_P (type
))
4416 /* A template type parameter or other dependent type. */
4417 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4418 "type %qT without an associated declaration", type
);
4420 cplus_decl_attributes (&type
, attrs
, 0);
4425 /* Process a DECLARATOR for a function-scope variable declaration,
4426 namespace-scope variable declaration, or function declaration.
4427 (Function definitions go through start_function; class member
4428 declarations appearing in the body of the class go through
4429 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4430 If an error occurs, the error_mark_node is returned instead.
4432 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4433 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4434 for an explicitly defaulted function, or SD_DELETED for an explicitly
4435 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4436 implicitly initialized via a default constructor. ATTRIBUTES and
4437 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4439 The scope represented by the context of the returned DECL is pushed
4440 (if it is not the global namespace) and is assigned to
4441 *PUSHED_SCOPE_P. The caller is then responsible for calling
4442 pop_scope on *PUSHED_SCOPE_P if it is set. */
4445 start_decl (const cp_declarator
*declarator
,
4446 cp_decl_specifier_seq
*declspecs
,
4449 tree prefix_attributes
,
4450 tree
*pushed_scope_p
)
4458 *pushed_scope_p
= NULL_TREE
;
4460 /* An object declared as __attribute__((deprecated)) suppresses
4461 warnings of uses of other deprecated items. */
4462 if (lookup_attribute ("deprecated", attributes
))
4463 deprecated_state
= DEPRECATED_SUPPRESS
;
4465 attributes
= chainon (attributes
, prefix_attributes
);
4467 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4470 deprecated_state
= DEPRECATED_NORMAL
;
4472 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4473 || decl
== error_mark_node
)
4474 return error_mark_node
;
4476 context
= CP_DECL_CONTEXT (decl
);
4477 if (context
!= global_namespace
)
4478 *pushed_scope_p
= push_scope (context
);
4481 /* Is it valid for this decl to have an initializer at all?
4482 If not, set INITIALIZED to zero, which will indirectly
4483 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4484 switch (TREE_CODE (decl
))
4487 error ("typedef %qD is initialized (use decltype instead)", decl
);
4488 return error_mark_node
;
4491 if (initialized
== SD_DELETED
)
4492 /* We'll handle the rest of the semantics later, but we need to
4493 set this now so it's visible to duplicate_decls. */
4494 DECL_DELETED_FN (decl
) = 1;
4503 if (! toplevel_bindings_p ()
4504 && DECL_EXTERNAL (decl
))
4505 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4507 DECL_EXTERNAL (decl
) = 0;
4508 if (toplevel_bindings_p ())
4509 TREE_STATIC (decl
) = 1;
4511 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4513 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4514 record_key_method_defined (decl
);
4516 /* If this is a typedef that names the class for linkage purposes
4517 (7.1.3p8), apply any attributes directly to the type. */
4518 if (TREE_CODE (decl
) == TYPE_DECL
4519 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4520 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4521 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4525 /* Set attributes here so if duplicate decl, will have proper attributes. */
4526 cplus_decl_attributes (&decl
, attributes
, flags
);
4528 /* Dllimported symbols cannot be defined. Static data members (which
4529 can be initialized in-class and dllimported) go through grokfield,
4530 not here, so we don't need to exclude those decls when checking for
4532 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4534 error ("definition of %q#D is marked %<dllimport%>", decl
);
4535 DECL_DLLIMPORT_P (decl
) = 0;
4538 /* If #pragma weak was used, mark the decl weak now. */
4539 if (!processing_template_decl
)
4540 maybe_apply_pragma_weak (decl
);
4542 if (TREE_CODE (decl
) == FUNCTION_DECL
4543 && DECL_DECLARED_INLINE_P (decl
)
4544 && DECL_UNINLINABLE (decl
)
4545 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4546 warning (0, "inline function %q+D given attribute noinline", decl
);
4548 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4552 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4553 if (field
== NULL_TREE
|| !VAR_P (field
))
4554 error ("%q#D is not a static member of %q#T", decl
, context
);
4557 if (DECL_CONTEXT (field
) != context
)
4559 if (!same_type_p (DECL_CONTEXT (field
), context
))
4560 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4561 "to be defined as %<%T::%D%>",
4562 DECL_CONTEXT (field
), DECL_NAME (decl
),
4563 context
, DECL_NAME (decl
));
4564 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4566 /* Static data member are tricky; an in-class initialization
4567 still doesn't provide a definition, so the in-class
4568 declaration will have DECL_EXTERNAL set, but will have an
4569 initialization. Thus, duplicate_decls won't warn
4570 about this situation, and so we check here. */
4571 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4572 error ("duplicate initialization of %qD", decl
);
4573 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4575 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4576 && !DECL_DECLARED_CONSTEXPR_P (field
))
4577 error ("%qD declared %<constexpr%> outside its class", field
);
4582 tree field
= check_classfn (context
, decl
,
4583 (processing_template_decl
4584 > template_class_depth (context
))
4585 ? current_template_parms
4587 if (field
&& field
!= error_mark_node
4588 && duplicate_decls (decl
, field
,
4589 /*newdecl_is_friend=*/false))
4593 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4594 DECL_IN_AGGR_P (decl
) = 0;
4595 /* Do not mark DECL as an explicit specialization if it was not
4596 already marked as an instantiation; a declaration should
4597 never be marked as a specialization unless we know what
4598 template is being specialized. */
4599 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4601 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4603 /* [temp.expl.spec] An explicit specialization of a static data
4604 member of a template is a definition if the declaration
4605 includes an initializer; otherwise, it is a declaration.
4607 We check for processing_specialization so this only applies
4608 to the new specialization syntax. */
4609 if (!initialized
&& processing_specialization
)
4610 DECL_EXTERNAL (decl
) = 1;
4613 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4614 /* Aliases are definitions. */
4616 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4620 was_public
= TREE_PUBLIC (decl
);
4622 /* Enter this declaration into the symbol table. */
4623 decl
= maybe_push_decl (decl
);
4625 if (processing_template_decl
)
4626 decl
= push_template_decl (decl
);
4627 if (decl
== error_mark_node
)
4628 return error_mark_node
;
4631 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4632 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4634 /* This is a const variable with implicit 'static'. Set
4635 DECL_THIS_STATIC so we can tell it from variables that are
4636 !TREE_PUBLIC because of the anonymous namespace. */
4637 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4638 DECL_THIS_STATIC (decl
) = 1;
4641 if (!processing_template_decl
&& VAR_P (decl
))
4642 start_decl_1 (decl
, initialized
);
4647 /* Process the declaration of a variable DECL. INITIALIZED is true
4648 iff DECL is explicitly initialized. (INITIALIZED is false if the
4649 variable is initialized via an implicitly-called constructor.)
4650 This function must be called for ordinary variables (including, for
4651 example, implicit instantiations of templates), but must not be
4652 called for template declarations. */
4655 start_decl_1 (tree decl
, bool initialized
)
4659 bool aggregate_definition_p
;
4661 gcc_assert (!processing_template_decl
);
4663 if (error_operand_p (decl
))
4666 gcc_assert (VAR_P (decl
));
4668 type
= TREE_TYPE (decl
);
4669 complete_p
= COMPLETE_TYPE_P (type
);
4670 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4672 /* If an explicit initializer is present, or if this is a definition
4673 of an aggregate, then we need a complete type at this point.
4674 (Scalars are always complete types, so there is nothing to
4675 check.) This code just sets COMPLETE_P; errors (if necessary)
4676 are issued below. */
4677 if ((initialized
|| aggregate_definition_p
)
4679 && COMPLETE_TYPE_P (complete_type (type
)))
4682 /* We will not yet have set TREE_READONLY on DECL if the type
4683 was "const", but incomplete, before this point. But, now, we
4684 have a complete type, so we can try again. */
4685 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4689 /* Is it valid for this decl to have an initializer at all? */
4691 /* Don't allow initializations for incomplete types except for
4692 arrays which might be completed by the initialization. */
4694 ; /* A complete type is ok. */
4695 else if (type_uses_auto (type
))
4696 ; /* An auto type is ok. */
4697 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4699 error ("variable %q#D has initializer but incomplete type", decl
);
4700 type
= TREE_TYPE (decl
) = error_mark_node
;
4702 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4704 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4705 error ("elements of array %q#D have incomplete type", decl
);
4706 /* else we already gave an error in start_decl. */
4709 else if (aggregate_definition_p
&& !complete_p
)
4711 if (type_uses_auto (type
))
4712 error ("declaration of %q#D has no initializer", decl
);
4714 error ("aggregate %q#D has incomplete type and cannot be defined",
4716 /* Change the type so that assemble_variable will give
4717 DECL an rtl we can live with: (mem (const_int 0)). */
4718 type
= TREE_TYPE (decl
) = error_mark_node
;
4721 /* Create a new scope to hold this declaration if necessary.
4722 Whether or not a new scope is necessary cannot be determined
4723 until after the type has been completed; if the type is a
4724 specialization of a class template it is not until after
4725 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4726 will be set correctly. */
4727 maybe_push_cleanup_level (type
);
4730 /* Handle initialization of references. DECL, TYPE, and INIT have the
4731 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4732 but will be set to a new CLEANUP_STMT if a temporary is created
4733 that must be destroyed subsequently.
4735 Returns an initializer expression to use to initialize DECL, or
4736 NULL if the initialization can be performed statically.
4738 Quotes on semantics can be found in ARM 8.4.3. */
4741 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4743 if (init
== NULL_TREE
)
4745 if ((DECL_LANG_SPECIFIC (decl
) == 0
4746 || DECL_IN_AGGR_P (decl
) == 0)
4747 && ! DECL_THIS_EXTERN (decl
))
4748 error ("%qD declared as reference but not initialized", decl
);
4752 if (TREE_CODE (init
) == TREE_LIST
)
4753 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4754 tf_warning_or_error
);
4756 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4757 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4758 /* Note: default conversion is only called in very special cases. */
4759 init
= decay_conversion (init
, tf_warning_or_error
);
4761 /* Convert INIT to the reference type TYPE. This may involve the
4762 creation of a temporary, whose lifetime must be the same as that
4763 of the reference. If so, a DECL_EXPR for the temporary will be
4764 added just after the DECL_EXPR for DECL. That's why we don't set
4765 DECL_INITIAL for local references (instead assigning to them
4766 explicitly); we need to allow the temporary to be initialized
4768 return initialize_reference (type
, init
, flags
,
4769 tf_warning_or_error
);
4772 /* Designated initializers in arrays are not supported in GNU C++.
4773 The parser cannot detect this error since it does not know whether
4774 a given brace-enclosed initializer is for a class type or for an
4775 array. This function checks that CE does not use a designated
4776 initializer. If it does, an error is issued. Returns true if CE
4777 is valid, i.e., does not have a designated initializer. */
4780 check_array_designated_initializer (constructor_elt
*ce
,
4781 unsigned HOST_WIDE_INT index
)
4783 /* Designated initializers for array elements are not supported. */
4786 /* The parser only allows identifiers as designated
4788 if (ce
->index
== error_mark_node
)
4790 error ("name used in a GNU-style designated "
4791 "initializer for an array");
4794 else if (identifier_p (ce
->index
))
4796 error ("name %qD used in a GNU-style designated "
4797 "initializer for an array", ce
->index
);
4801 ce
->index
= cxx_constant_value (ce
->index
);
4803 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4805 /* A C99 designator is OK if it matches the current index. */
4806 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4809 sorry ("non-trivial designated initializers not supported");
4820 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4821 array until we finish parsing the initializer. If that's the
4822 situation we're in, update DECL accordingly. */
4825 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4827 tree type
= TREE_TYPE (decl
);
4829 if (TREE_CODE (type
) == ARRAY_TYPE
4830 && TYPE_DOMAIN (type
) == NULL_TREE
4831 && TREE_CODE (decl
) != TYPE_DECL
)
4833 /* do_default is really a C-ism to deal with tentative definitions.
4834 But let's leave it here to ease the eventual merge. */
4835 int do_default
= !DECL_EXTERNAL (decl
);
4836 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4839 /* Check that there are no designated initializers in INIT, as
4840 those are not supported in GNU C++, and as the middle-end
4841 will crash if presented with a non-numeric designated
4843 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4845 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4846 constructor_elt
*ce
;
4848 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4849 if (!check_array_designated_initializer (ce
, i
))
4855 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4859 error ("initializer fails to determine size of %qD", decl
);
4861 else if (failure
== 2)
4865 error ("array size missing in %qD", decl
);
4867 /* If a `static' var's size isn't known, make it extern as
4868 well as static, so it does not get allocated. If it's not
4869 `static', then don't mark it extern; finish_incomplete_decl
4870 will give it a default size and it will get allocated. */
4871 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4872 DECL_EXTERNAL (decl
) = 1;
4874 else if (failure
== 3)
4876 error ("zero-size array %qD", decl
);
4880 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4882 relayout_decl (decl
);
4886 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4887 any appropriate error messages regarding the layout. */
4890 layout_var_decl (tree decl
)
4894 type
= TREE_TYPE (decl
);
4895 if (type
== error_mark_node
)
4898 /* If we haven't already laid out this declaration, do so now.
4899 Note that we must not call complete type for an external object
4900 because it's type might involve templates that we are not
4901 supposed to instantiate yet. (And it's perfectly valid to say
4902 `extern X x' for some incomplete type `X'.) */
4903 if (!DECL_EXTERNAL (decl
))
4904 complete_type (type
);
4905 if (!DECL_SIZE (decl
)
4906 && TREE_TYPE (decl
) != error_mark_node
4907 && (COMPLETE_TYPE_P (type
)
4908 || (TREE_CODE (type
) == ARRAY_TYPE
4909 && !TYPE_DOMAIN (type
)
4910 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4911 layout_decl (decl
, 0);
4913 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4915 /* An automatic variable with an incomplete type: that is an error.
4916 Don't talk about array types here, since we took care of that
4917 message in grokdeclarator. */
4918 error ("storage size of %qD isn%'t known", decl
);
4919 TREE_TYPE (decl
) = error_mark_node
;
4922 /* Keep this code around in case we later want to control debug info
4923 based on whether a type is "used". (jason 1999-11-11) */
4925 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4926 /* Let debugger know it should output info for this type. */
4927 note_debug_info_needed (ttype
);
4929 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4930 note_debug_info_needed (DECL_CONTEXT (decl
));
4933 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4934 && DECL_SIZE (decl
) != NULL_TREE
4935 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4937 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4938 constant_expression_warning (DECL_SIZE (decl
));
4941 error ("storage size of %qD isn%'t constant", decl
);
4942 TREE_TYPE (decl
) = error_mark_node
;
4947 /* If a local static variable is declared in an inline function, or if
4948 we have a weak definition, we must endeavor to create only one
4949 instance of the variable at link-time. */
4952 maybe_commonize_var (tree decl
)
4954 /* Static data in a function with comdat linkage also has comdat
4956 if (TREE_STATIC (decl
)
4957 /* Don't mess with __FUNCTION__. */
4958 && ! DECL_ARTIFICIAL (decl
)
4959 && DECL_FUNCTION_SCOPE_P (decl
)
4960 && vague_linkage_p (DECL_CONTEXT (decl
)))
4964 /* With weak symbols, we simply make the variable COMDAT;
4965 that will cause copies in multiple translations units to
4967 comdat_linkage (decl
);
4971 if (DECL_INITIAL (decl
) == NULL_TREE
4972 || DECL_INITIAL (decl
) == error_mark_node
)
4974 /* Without weak symbols, we can use COMMON to merge
4975 uninitialized variables. */
4976 TREE_PUBLIC (decl
) = 1;
4977 DECL_COMMON (decl
) = 1;
4981 /* While for initialized variables, we must use internal
4982 linkage -- which means that multiple copies will not
4984 TREE_PUBLIC (decl
) = 0;
4985 DECL_COMMON (decl
) = 0;
4986 warning_at (input_location
, 0,
4987 "sorry: semantics of inline function static "
4988 "data %q+#D are wrong (you%'ll wind up "
4989 "with multiple copies)", decl
);
4990 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4991 " you can work around this by removing "
4996 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4997 /* Set it up again; we might have set DECL_INITIAL since the last
4999 comdat_linkage (decl
);
5002 /* Issue an error message if DECL is an uninitialized const variable. */
5005 check_for_uninitialized_const_var (tree decl
)
5007 tree type
= strip_array_types (TREE_TYPE (decl
));
5009 /* ``Unless explicitly declared extern, a const object does not have
5010 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5013 && TREE_CODE (type
) != REFERENCE_TYPE
5014 && CP_TYPE_CONST_P (type
)
5015 && !DECL_INITIAL (decl
))
5017 tree field
= default_init_uninitialized_part (type
);
5021 permerror (DECL_SOURCE_LOCATION (decl
),
5022 "uninitialized const %qD", decl
);
5024 if (CLASS_TYPE_P (type
))
5026 tree defaulted_ctor
;
5028 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5029 "%q#T has no user-provided default constructor", type
);
5030 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5032 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5033 "constructor is not user-provided because it is "
5034 "explicitly defaulted in the class body");
5035 inform (0, "and the implicitly-defined constructor does not "
5036 "initialize %q+#D", field
);
5041 /* Structure holding the current initializer being processed by reshape_init.
5042 CUR is a pointer to the current element being processed, END is a pointer
5043 after the last element present in the initializer. */
5044 typedef struct reshape_iterator_t
5046 constructor_elt
*cur
;
5047 constructor_elt
*end
;
5050 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5052 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5053 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5054 initialized. If there are no more such fields, the return value
5058 next_initializable_field (tree field
)
5061 && (TREE_CODE (field
) != FIELD_DECL
5062 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5063 || DECL_ARTIFICIAL (field
)))
5064 field
= DECL_CHAIN (field
);
5069 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5070 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5071 INTEGER_CST representing the size of the array minus one (the maximum index),
5072 or NULL_TREE if the array was declared without specifying the size. D is
5073 the iterator within the constructor. */
5076 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5077 tsubst_flags_t complain
)
5080 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5081 unsigned HOST_WIDE_INT max_index_cst
= 0;
5082 unsigned HOST_WIDE_INT index
;
5084 /* The initializer for an array is always a CONSTRUCTOR. */
5085 new_init
= build_constructor (init_list_type_node
, NULL
);
5089 /* Minus 1 is used for zero sized arrays. */
5090 if (integer_all_onesp (max_index
))
5093 if (host_integerp (max_index
, 1))
5094 max_index_cst
= tree_low_cst (max_index
, 1);
5095 /* sizetype is sign extended, not zero extended. */
5097 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5101 /* Loop until there are no more initializers. */
5103 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5107 constructor_elt
*old_cur
= d
->cur
;
5109 check_array_designated_initializer (d
->cur
, index
);
5110 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5112 if (elt_init
== error_mark_node
)
5113 return error_mark_node
;
5114 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5115 size_int (index
), elt_init
);
5116 if (!TREE_CONSTANT (elt_init
))
5117 TREE_CONSTANT (new_init
) = false;
5119 /* This can happen with an invalid initializer (c++/54501). */
5120 if (d
->cur
== old_cur
&& !sized_array_p
)
5127 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5128 Parameters are the same of reshape_init_r. */
5131 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5133 tree max_index
= NULL_TREE
;
5135 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5137 if (TYPE_DOMAIN (type
))
5138 max_index
= array_type_nelts (type
);
5140 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5143 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5144 Parameters are the same of reshape_init_r. */
5147 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5149 tree max_index
= NULL_TREE
;
5151 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5153 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5155 tree value
= d
->cur
->value
;
5156 if (!same_type_p (TREE_TYPE (value
), type
))
5158 if (complain
& tf_error
)
5159 error ("invalid type %qT as initializer for a vector of type %qT",
5160 TREE_TYPE (d
->cur
->value
), type
);
5161 value
= error_mark_node
;
5167 /* For a vector, we initialize it as an array of the appropriate size. */
5168 if (TREE_CODE (type
) == VECTOR_TYPE
)
5169 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5171 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5174 /* Subroutine of reshape_init_r, processes the initializers for classes
5175 or union. Parameters are the same of reshape_init_r. */
5178 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5179 tsubst_flags_t complain
)
5184 gcc_assert (CLASS_TYPE_P (type
));
5186 /* The initializer for a class is always a CONSTRUCTOR. */
5187 new_init
= build_constructor (init_list_type_node
, NULL
);
5188 field
= next_initializable_field (TYPE_FIELDS (type
));
5194 An initializer for an aggregate member that is an
5195 empty class shall have the form of an empty
5196 initializer-list {}. */
5197 if (!first_initializer_p
)
5199 if (complain
& tf_error
)
5200 error ("initializer for %qT must be brace-enclosed", type
);
5201 return error_mark_node
;
5206 /* Loop through the initializable fields, gathering initializers. */
5207 while (d
->cur
!= d
->end
)
5210 constructor_elt
*old_cur
= d
->cur
;
5212 /* Handle designated initializers, as an extension. */
5215 if (d
->cur
->index
== error_mark_node
)
5216 return error_mark_node
;
5218 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5220 if (complain
& tf_error
)
5221 error ("%<[%E] =%> used in a GNU-style designated initializer"
5222 " for class %qT", d
->cur
->index
, type
);
5223 return error_mark_node
;
5226 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5227 /* We already reshaped this. */
5228 gcc_assert (d
->cur
->index
== field
);
5230 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5232 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5234 if (complain
& tf_error
)
5235 error ("%qT has no non-static data member named %qD", type
,
5237 return error_mark_node
;
5241 /* If we processed all the member of the class, we are done. */
5245 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5246 /*first_initializer_p=*/false, complain
);
5247 if (field_init
== error_mark_node
)
5248 return error_mark_node
;
5250 if (d
->cur
== old_cur
&& d
->cur
->index
)
5252 /* This can happen with an invalid initializer for a flexible
5253 array member (c++/54441). */
5254 if (complain
& tf_error
)
5255 error ("invalid initializer for %q#D", field
);
5256 return error_mark_node
;
5259 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5263 When a union is initialized with a brace-enclosed
5264 initializer, the braces shall only contain an
5265 initializer for the first member of the union. */
5266 if (TREE_CODE (type
) == UNION_TYPE
)
5269 field
= next_initializable_field (DECL_CHAIN (field
));
5275 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5276 designators are not valid; either complain or return true to indicate
5277 that reshape_init_r should return error_mark_node. */
5280 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5284 if (complain
& tf_error
)
5285 error ("C99 designator %qE outside aggregate initializer",
5293 /* Subroutine of reshape_init, which processes a single initializer (part of
5294 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5295 iterator within the CONSTRUCTOR which points to the initializer to process.
5296 FIRST_INITIALIZER_P is true if this is the first initializer of the
5297 outermost CONSTRUCTOR node. */
5300 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5301 tsubst_flags_t complain
)
5303 tree init
= d
->cur
->value
;
5305 if (error_operand_p (init
))
5306 return error_mark_node
;
5308 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5309 && has_designator_problem (d
, complain
))
5310 return error_mark_node
;
5312 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5314 /* A complex type can be initialized from one or two initializers,
5315 but braces are not elided. */
5317 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5319 if (CONSTRUCTOR_NELTS (init
) > 2)
5321 if (complain
& tf_error
)
5322 error ("too many initializers for %qT", type
);
5324 return error_mark_node
;
5327 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5329 vec
<constructor_elt
, va_gc
> *v
= 0;
5330 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5331 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5332 if (has_designator_problem (d
, complain
))
5333 return error_mark_node
;
5335 init
= build_constructor (init_list_type_node
, v
);
5340 /* A non-aggregate type is always initialized with a single
5342 if (!CP_AGGREGATE_TYPE_P (type
))
5344 /* It is invalid to initialize a non-aggregate type with a
5345 brace-enclosed initializer before C++0x.
5346 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5347 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5348 a CONSTRUCTOR (with a record type). */
5349 if (TREE_CODE (init
) == CONSTRUCTOR
5350 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5352 if (SCALAR_TYPE_P (type
))
5354 if (complain
& tf_error
)
5355 error ("braces around scalar initializer for type %qT", type
);
5356 init
= error_mark_node
;
5359 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5368 All implicit type conversions (clause _conv_) are considered when
5369 initializing the aggregate member with an initializer from an
5370 initializer-list. If the initializer can initialize a member,
5371 the member is initialized. Otherwise, if the member is itself a
5372 non-empty subaggregate, brace elision is assumed and the
5373 initializer is considered for the initialization of the first
5374 member of the subaggregate. */
5375 if (TREE_CODE (init
) != CONSTRUCTOR
5376 /* But don't try this for the first initializer, since that would be
5377 looking through the outermost braces; A a2 = { a1 }; is not a
5378 valid aggregate initialization. */
5379 && !first_initializer_p
5380 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5381 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5388 /* [dcl.init.string]
5390 A char array (whether plain char, signed char, or unsigned char)
5391 can be initialized by a string-literal (optionally enclosed in
5392 braces); a wchar_t array can be initialized by a wide
5393 string-literal (optionally enclosed in braces). */
5394 if (TREE_CODE (type
) == ARRAY_TYPE
5395 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5397 tree str_init
= init
;
5399 /* Strip one level of braces if and only if they enclose a single
5400 element (as allowed by [dcl.init.string]). */
5401 if (!first_initializer_p
5402 && TREE_CODE (str_init
) == CONSTRUCTOR
5403 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5405 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5408 /* If it's a string literal, then it's the initializer for the array
5409 as a whole. Otherwise, continue with normal initialization for
5410 array types (one value per array element). */
5411 if (TREE_CODE (str_init
) == STRING_CST
)
5413 if (has_designator_problem (d
, complain
))
5414 return error_mark_node
;
5420 /* The following cases are about aggregates. If we are not within a full
5421 initializer already, and there is not a CONSTRUCTOR, it means that there
5422 is a missing set of braces (that is, we are processing the case for
5423 which reshape_init exists). */
5424 if (!first_initializer_p
)
5426 if (TREE_CODE (init
) == CONSTRUCTOR
)
5428 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5429 /* There is no need to reshape pointer-to-member function
5430 initializers, as they are always constructed correctly
5431 by the front end. */
5433 else if (COMPOUND_LITERAL_P (init
))
5434 /* For a nested compound literal, there is no need to reshape since
5435 brace elision is not allowed. Even if we decided to allow it,
5436 we should add a call to reshape_init in finish_compound_literal,
5437 before calling digest_init, so changing this code would still
5438 not be necessary. */
5439 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5443 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5444 return reshape_init (type
, init
, complain
);
5448 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5452 /* Dispatch to specialized routines. */
5453 if (CLASS_TYPE_P (type
))
5454 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5455 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5456 return reshape_init_array (type
, d
, complain
);
5457 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5458 return reshape_init_vector (type
, d
, complain
);
5463 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5464 brace-enclosed aggregate initializer.
5466 INIT is the CONSTRUCTOR containing the list of initializers describing
5467 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5468 It may not presently match the shape of the TYPE; for example:
5470 struct S { int a; int b; };
5471 struct S a[] = { 1, 2, 3, 4 };
5473 Here INIT will hold a vector of four elements, rather than a
5474 vector of two elements, each itself a vector of two elements. This
5475 routine transforms INIT from the former form into the latter. The
5476 revised CONSTRUCTOR node is returned. */
5479 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5481 vec
<constructor_elt
, va_gc
> *v
;
5485 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5487 v
= CONSTRUCTOR_ELTS (init
);
5489 /* An empty constructor does not need reshaping, and it is always a valid
5491 if (vec_safe_is_empty (v
))
5494 /* Recurse on this CONSTRUCTOR. */
5496 d
.end
= d
.cur
+ v
->length ();
5498 new_init
= reshape_init_r (type
, &d
, true, complain
);
5499 if (new_init
== error_mark_node
)
5500 return error_mark_node
;
5502 /* Make sure all the element of the constructor were used. Otherwise,
5503 issue an error about exceeding initializers. */
5506 if (complain
& tf_error
)
5507 error ("too many initializers for %qT", type
);
5509 return error_mark_node
;
5515 /* Verify array initializer. Returns true if errors have been reported. */
5518 check_array_initializer (tree decl
, tree type
, tree init
)
5520 tree element_type
= TREE_TYPE (type
);
5522 /* The array type itself need not be complete, because the
5523 initializer may tell us how many elements are in the array.
5524 But, the elements of the array must be complete. */
5525 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5528 error ("elements of array %q#D have incomplete type", decl
);
5530 error ("elements of array %q#T have incomplete type", type
);
5533 /* A compound literal can't have variable size. */
5535 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5536 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5538 error ("variable-sized compound literal");
5544 /* Subroutine of check_initializer; args are passed down from that function.
5545 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5548 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5551 gcc_assert (stmts_are_full_exprs_p ());
5552 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5555 /* Verify INIT (the initializer for DECL), and record the
5556 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5557 grok_reference_init.
5559 If the return value is non-NULL, it is an expression that must be
5560 evaluated dynamically to initialize DECL. */
5563 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5565 tree type
= TREE_TYPE (decl
);
5566 tree init_code
= NULL
;
5567 tree extra_init
= NULL_TREE
;
5570 /* Things that are going to be initialized need to have complete
5572 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5574 if (DECL_HAS_VALUE_EXPR_P (decl
))
5576 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5577 it doesn't have storage to be initialized. */
5578 gcc_assert (init
== NULL_TREE
);
5582 if (type
== error_mark_node
)
5583 /* We will have already complained. */
5586 if (TREE_CODE (type
) == ARRAY_TYPE
)
5588 if (check_array_initializer (decl
, type
, init
))
5591 else if (!COMPLETE_TYPE_P (type
))
5593 error ("%q#D has incomplete type", decl
);
5594 TREE_TYPE (decl
) = error_mark_node
;
5598 /* There is no way to make a variable-sized class type in GNU C++. */
5599 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5601 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5603 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5604 if (SCALAR_TYPE_P (type
))
5608 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5609 init
= build_zero_init (type
, NULL_TREE
, false);
5611 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5613 error ("scalar object %qD requires one element in initializer",
5615 TREE_TYPE (decl
) = error_mark_node
;
5621 if (TREE_CODE (decl
) == CONST_DECL
)
5623 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5625 DECL_INITIAL (decl
) = init
;
5627 gcc_assert (init
!= NULL_TREE
);
5630 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5632 else if (init
|| type_build_ctor_call (type
)
5633 || TREE_CODE (type
) == REFERENCE_TYPE
)
5635 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5637 init
= grok_reference_init (decl
, type
, init
, flags
);
5638 flags
|= LOOKUP_ALREADY_DIGESTED
;
5641 check_for_uninitialized_const_var (decl
);
5642 /* Do not reshape constructors of vectors (they don't need to be
5644 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5646 if (is_std_init_list (type
))
5648 init
= perform_implicit_conversion (type
, init
,
5649 tf_warning_or_error
);
5650 flags
|= LOOKUP_ALREADY_DIGESTED
;
5652 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5654 /* Don't reshape if the class has constructors. */
5655 if (cxx_dialect
== cxx98
)
5656 error ("in C++98 %qD must be initialized by constructor, "
5660 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5662 error ("opaque vector types cannot be initialized");
5663 init
= error_mark_node
;
5667 init
= reshape_init (type
, init
, tf_warning_or_error
);
5668 if (SCALAR_TYPE_P (type
))
5669 check_narrowing (type
, init
);
5673 /* If DECL has an array type without a specific bound, deduce the
5674 array size from the initializer. */
5675 maybe_deduce_size_from_array_init (decl
, init
);
5676 type
= TREE_TYPE (decl
);
5677 if (type
== error_mark_node
)
5680 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5681 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5682 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5683 && CP_AGGREGATE_TYPE_P (type
)
5684 && (CLASS_TYPE_P (type
)
5685 || type_has_extended_temps (type
))))
5687 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5689 /* A constructor call is a non-trivial initializer even if
5690 it isn't explicitly written. */
5691 if (TREE_SIDE_EFFECTS (init_code
))
5692 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5694 /* If this is a constexpr initializer, expand_default_init will
5695 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5696 case, pull the initializer back out and pass it down into
5697 store_init_value. */
5698 while (TREE_CODE (init_code
) == EXPR_STMT
5699 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5700 init_code
= TREE_OPERAND (init_code
, 0);
5701 if (TREE_CODE (init_code
) == INIT_EXPR
)
5703 init
= TREE_OPERAND (init_code
, 1);
5704 init_code
= NULL_TREE
;
5705 /* Don't call digest_init; it's unnecessary and will complain
5706 about aggregate initialization of non-aggregate classes. */
5707 flags
|= LOOKUP_ALREADY_DIGESTED
;
5709 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5711 /* Declared constexpr, but no suitable initializer; massage
5712 init appropriately so we can pass it into store_init_value
5714 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5715 init
= finish_compound_literal (type
, init
,
5716 tf_warning_or_error
);
5717 else if (CLASS_TYPE_P (type
)
5718 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5720 init
= build_functional_cast (type
, init
, tf_none
);
5721 if (TREE_CODE (init
) == TARGET_EXPR
)
5722 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5724 init_code
= NULL_TREE
;
5730 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5732 /* In aggregate initialization of a variable, each element
5733 initialization is a full-expression because there is no
5734 enclosing expression. */
5735 gcc_assert (stmts_are_full_exprs_p ());
5737 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5739 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5740 && DECL_INITIAL (decl
)
5741 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5742 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5743 warning (0, "array %qD initialized by parenthesized string literal %qE",
5744 decl
, DECL_INITIAL (decl
));
5750 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5751 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5752 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5753 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5756 check_for_uninitialized_const_var (decl
);
5759 if (init
&& init
!= error_mark_node
)
5760 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5763 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5765 if (init_code
&& DECL_IN_AGGR_P (decl
))
5767 static int explained
= 0;
5769 if (cxx_dialect
< cxx11
)
5770 error ("initializer invalid for static member with constructor");
5772 error ("non-constant in-class initialization invalid for static "
5773 "member %qD", decl
);
5776 error ("(an out of class initialization is required)");
5784 /* If DECL is not a local variable, give it RTL. */
5787 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5789 int toplev
= toplevel_bindings_p ();
5791 const char *filename
;
5793 /* Set the DECL_ASSEMBLER_NAME for the object. */
5796 /* The `register' keyword, when used together with an
5797 asm-specification, indicates that the variable should be
5798 placed in a particular register. */
5799 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5801 set_user_assembler_name (decl
, asmspec
);
5802 DECL_HARD_REGISTER (decl
) = 1;
5806 if (TREE_CODE (decl
) == FUNCTION_DECL
5807 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5808 set_builtin_user_assembler_name (decl
, asmspec
);
5809 set_user_assembler_name (decl
, asmspec
);
5813 /* Handle non-variables up front. */
5816 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5820 /* If we see a class member here, it should be a static data
5822 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5824 gcc_assert (TREE_STATIC (decl
));
5825 /* An in-class declaration of a static data member should be
5826 external; it is only a declaration, and not a definition. */
5827 if (init
== NULL_TREE
)
5828 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5831 /* We don't create any RTL for local variables. */
5832 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5835 /* We defer emission of local statics until the corresponding
5836 DECL_EXPR is expanded. */
5837 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5839 /* We try to defer namespace-scope static constants so that they are
5840 not emitted into the object file unnecessarily. */
5841 filename
= input_filename
;
5842 if (!DECL_VIRTUAL_P (decl
)
5843 && TREE_READONLY (decl
)
5844 && DECL_INITIAL (decl
) != NULL_TREE
5845 && DECL_INITIAL (decl
) != error_mark_node
5847 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5849 && !TREE_PUBLIC (decl
))
5851 /* Fool with the linkage of static consts according to #pragma
5853 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5854 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5856 TREE_PUBLIC (decl
) = 1;
5857 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5862 /* Likewise for template instantiations. */
5863 else if (DECL_LANG_SPECIFIC (decl
)
5864 && DECL_IMPLICIT_INSTANTIATION (decl
))
5867 /* If we're not deferring, go ahead and assemble the variable. */
5869 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5872 /* walk_tree helper for wrap_temporary_cleanups, below. */
5875 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5877 /* Stop at types or full-expression boundaries. */
5878 if (TYPE_P (*stmt_p
)
5879 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5885 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5887 tree guard
= (tree
)data
;
5888 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5890 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5891 /* Tell honor_protect_cleanup_actions to handle this as a separate
5893 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5895 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5901 /* We're initializing a local variable which has a cleanup GUARD. If there
5902 are any temporaries used in the initializer INIT of this variable, we
5903 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5904 variable will be cleaned up properly if one of them throws.
5906 Unfortunately, there's no way to express this properly in terms of
5907 nesting, as the regions for the temporaries overlap the region for the
5908 variable itself; if there are two temporaries, the variable needs to be
5909 the first thing destroyed if either of them throws. However, we only
5910 want to run the variable's cleanup if it actually got constructed. So
5911 we need to guard the temporary cleanups with the variable's cleanup if
5912 they are run on the normal path, but not if they are run on the
5913 exceptional path. We implement this by telling
5914 honor_protect_cleanup_actions to strip the variable cleanup from the
5915 exceptional path. */
5918 wrap_temporary_cleanups (tree init
, tree guard
)
5920 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5923 /* Generate code to initialize DECL (a local variable). */
5926 initialize_local_var (tree decl
, tree init
)
5928 tree type
= TREE_TYPE (decl
);
5932 gcc_assert (VAR_P (decl
)
5933 || TREE_CODE (decl
) == RESULT_DECL
);
5934 gcc_assert (!TREE_STATIC (decl
));
5936 if (DECL_SIZE (decl
) == NULL_TREE
)
5938 /* If we used it already as memory, it must stay in memory. */
5939 DECL_INITIAL (decl
) = NULL_TREE
;
5940 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5944 if (type
== error_mark_node
)
5947 /* Compute and store the initial value. */
5948 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5949 if (TREE_USED (type
))
5950 DECL_READ_P (decl
) = 1;
5952 /* Generate a cleanup, if necessary. */
5953 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5955 /* Perform the initialization. */
5958 if (TREE_CODE (init
) == INIT_EXPR
5959 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5961 /* Stick simple initializers in DECL_INITIAL so that
5962 -Wno-init-self works (c++/34772). */
5963 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5964 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5968 int saved_stmts_are_full_exprs_p
;
5970 /* If we're only initializing a single object, guard the
5971 destructors of any temporaries used in its initializer with
5972 its destructor. This isn't right for arrays because each
5973 element initialization is a full-expression. */
5974 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5975 wrap_temporary_cleanups (init
, cleanup
);
5977 gcc_assert (building_stmt_list_p ());
5978 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5979 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5980 finish_expr_stmt (init
);
5981 current_stmt_tree ()->stmts_are_full_exprs_p
=
5982 saved_stmts_are_full_exprs_p
;
5986 /* Set this to 0 so we can tell whether an aggregate which was
5987 initialized was ever used. Don't do this if it has a
5988 destructor, so we don't complain about the 'resource
5989 allocation is initialization' idiom. Now set
5990 attribute((unused)) on types so decls of that type will be
5991 marked used. (see TREE_USED, above.) */
5992 if (TYPE_NEEDS_CONSTRUCTING (type
)
5994 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5995 && DECL_NAME (decl
))
5996 TREE_USED (decl
) = 0;
5997 else if (already_used
)
5998 TREE_USED (decl
) = 1;
6001 finish_decl_cleanup (decl
, cleanup
);
6004 /* DECL is a VAR_DECL for a compiler-generated variable with static
6005 storage duration (like a virtual table) whose initializer is a
6006 compile-time constant. Initialize the variable and provide it to the
6010 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6013 gcc_assert (DECL_ARTIFICIAL (decl
));
6014 init
= build_constructor (TREE_TYPE (decl
), v
);
6015 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6016 DECL_INITIAL (decl
) = init
;
6017 DECL_INITIALIZED_P (decl
) = 1;
6018 determine_visibility (decl
);
6019 layout_var_decl (decl
);
6020 maybe_commonize_var (decl
);
6021 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6024 /* INIT is the initializer for a variable, as represented by the
6025 parser. Returns true iff INIT is type-dependent. */
6028 type_dependent_init_p (tree init
)
6030 if (TREE_CODE (init
) == TREE_LIST
)
6031 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6032 return any_type_dependent_elements_p (init
);
6033 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6034 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6036 vec
<constructor_elt
, va_gc
> *elts
;
6040 elts
= CONSTRUCTOR_ELTS (init
);
6041 nelts
= vec_safe_length (elts
);
6042 for (i
= 0; i
< nelts
; ++i
)
6043 if (type_dependent_init_p ((*elts
)[i
].value
))
6047 /* It must be a simple expression, e.g., int i = 3; */
6048 return type_dependent_expression_p (init
);
6053 /* INIT is the initializer for a variable, as represented by the
6054 parser. Returns true iff INIT is value-dependent. */
6057 value_dependent_init_p (tree init
)
6059 if (TREE_CODE (init
) == TREE_LIST
)
6060 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6061 return any_value_dependent_elements_p (init
);
6062 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6063 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6065 vec
<constructor_elt
, va_gc
> *elts
;
6069 elts
= CONSTRUCTOR_ELTS (init
);
6070 nelts
= vec_safe_length (elts
);
6071 for (i
= 0; i
< nelts
; ++i
)
6072 if (value_dependent_init_p ((*elts
)[i
].value
))
6076 /* It must be a simple expression, e.g., int i = 3; */
6077 return value_dependent_expression_p (init
);
6082 /* Finish processing of a declaration;
6083 install its line number and initial value.
6084 If the length of an array type is not known before,
6085 it must be determined now, from the initial value, or it is an error.
6087 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6088 true, then INIT is an integral constant expression.
6090 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6091 if the (init) syntax was used. */
6094 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6095 tree asmspec_tree
, int flags
)
6098 vec
<tree
, va_gc
> *cleanups
= NULL
;
6099 const char *asmspec
= NULL
;
6100 int was_readonly
= 0;
6101 bool var_definition_p
= false;
6104 if (decl
== error_mark_node
)
6109 error ("assignment (not initialization) in declaration");
6113 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6114 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6115 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6117 type
= TREE_TYPE (decl
);
6118 if (type
== error_mark_node
)
6121 /* If a name was specified, get the string. */
6122 if (at_namespace_scope_p ())
6123 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6124 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6125 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6127 if (current_class_type
6128 && CP_DECL_CONTEXT (decl
) == current_class_type
6129 && TYPE_BEING_DEFINED (current_class_type
)
6130 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6131 && (DECL_INITIAL (decl
) || init
))
6132 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6134 if (TREE_CODE (decl
) != FUNCTION_DECL
6135 && (auto_node
= type_uses_auto (type
)))
6138 if (init
== NULL_TREE
)
6140 if (DECL_LANG_SPECIFIC (decl
)
6141 && DECL_TEMPLATE_INSTANTIATION (decl
)
6142 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6144 /* init is null because we're deferring instantiating the
6145 initializer until we need it. Well, we need it now. */
6146 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6150 error ("declaration of %q#D has no initializer", decl
);
6151 TREE_TYPE (decl
) = error_mark_node
;
6155 if (TREE_CODE (d_init
) == TREE_LIST
)
6156 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6157 tf_warning_or_error
);
6158 d_init
= resolve_nondeduced_context (d_init
);
6159 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6161 if (type
== error_mark_node
)
6163 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6166 if (!ensure_literal_type_for_constexpr_object (decl
))
6167 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6170 && DECL_CLASS_SCOPE_P (decl
)
6171 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6172 check_static_variable_definition (decl
, type
);
6174 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6177 if (init
== ridpointers
[(int)RID_DELETE
])
6179 /* FIXME check this is 1st decl. */
6180 DECL_DELETED_FN (decl
) = 1;
6181 DECL_DECLARED_INLINE_P (decl
) = 1;
6182 DECL_INITIAL (decl
) = error_mark_node
;
6183 FOR_EACH_CLONE (clone
, decl
)
6185 DECL_DELETED_FN (clone
) = 1;
6186 DECL_DECLARED_INLINE_P (clone
) = 1;
6187 DECL_INITIAL (clone
) = error_mark_node
;
6191 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6193 if (defaultable_fn_check (decl
))
6194 DECL_DEFAULTED_FN (decl
) = 1;
6196 DECL_INITIAL (decl
) = NULL_TREE
;
6200 if (init
&& VAR_P (decl
))
6202 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6203 /* If DECL is a reference, then we want to know whether init is a
6204 reference constant; init_const_expr_p as passed tells us whether
6205 it's an rvalue constant. */
6206 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6207 init_const_expr_p
= potential_constant_expression (init
);
6208 if (init_const_expr_p
)
6210 /* Set these flags now for templates. We'll update the flags in
6211 store_init_value for instantiations. */
6212 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6213 if (decl_maybe_constant_var_p (decl
))
6214 TREE_CONSTANT (decl
) = 1;
6218 if (processing_template_decl
)
6220 bool type_dependent_p
;
6222 /* Add this declaration to the statement-tree. */
6223 if (at_function_scope_p ())
6224 add_decl_expr (decl
);
6226 type_dependent_p
= dependent_type_p (type
);
6228 if (check_for_bare_parameter_packs (init
))
6231 DECL_INITIAL (decl
) = NULL_TREE
;
6234 /* Generally, initializers in templates are expanded when the
6235 template is instantiated. But, if DECL is a variable constant
6236 then it can be used in future constant expressions, so its value
6237 must be available. */
6239 if (!VAR_P (decl
) || dependent_type_p (type
))
6240 /* We can't do anything if the decl has dependent type. */;
6242 && init_const_expr_p
6243 && !type_dependent_p
6244 && decl_maybe_constant_var_p (decl
)
6245 && !type_dependent_init_p (init
)
6246 && !value_dependent_init_p (init
))
6248 /* This variable seems to be a non-dependent constant, so process
6249 its initializer. If check_initializer returns non-null the
6250 initialization wasn't constant after all. */
6252 cleanups
= make_tree_vector ();
6253 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6254 if (init_code
== NULL_TREE
)
6256 release_tree_vector (cleanups
);
6258 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6260 /* Deduce array size even if the initializer is dependent. */
6261 maybe_deduce_size_from_array_init (decl
, init
);
6262 /* And complain about multiple initializers. */
6263 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6264 && !MAYBE_CLASS_TYPE_P (type
))
6265 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6266 tf_warning_or_error
);
6270 DECL_INITIAL (decl
) = init
;
6274 /* Just store non-static data member initializers for later. */
6275 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6276 DECL_INITIAL (decl
) = init
;
6278 /* Take care of TYPE_DECLs up front. */
6279 if (TREE_CODE (decl
) == TYPE_DECL
)
6281 if (type
!= error_mark_node
6282 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6284 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6285 warning (0, "shadowing previous type declaration of %q#D", decl
);
6286 set_identifier_type_value (DECL_NAME (decl
), decl
);
6289 /* If we have installed this as the canonical typedef for this
6290 type, and that type has not been defined yet, delay emitting
6291 the debug information for it, as we will emit it later. */
6292 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6293 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6294 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6296 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6301 /* A reference will be modified here, as it is initialized. */
6302 if (! DECL_EXTERNAL (decl
)
6303 && TREE_READONLY (decl
)
6304 && TREE_CODE (type
) == REFERENCE_TYPE
)
6307 TREE_READONLY (decl
) = 0;
6312 /* If this is a local variable that will need a mangled name,
6313 register it now. We must do this before processing the
6314 initializer for the variable, since the initialization might
6315 require a guard variable, and since the mangled name of the
6316 guard variable will depend on the mangled name of this
6318 if (DECL_FUNCTION_SCOPE_P (decl
)
6319 && TREE_STATIC (decl
)
6320 && !DECL_ARTIFICIAL (decl
))
6322 push_local_name (decl
);
6323 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6324 || DECL_DESTRUCTOR_P (current_function_decl
))
6325 /* Normally local_decls is populated during GIMPLE lowering,
6326 but [cd]tors are never actually compiled directly. We need
6327 to put statics on the list so we can deal with the label
6328 address extension. FIXME. */
6329 add_local_decl (cfun
, decl
);
6332 /* Convert the initializer to the type of DECL, if we have not
6333 already initialized DECL. */
6334 if (!DECL_INITIALIZED_P (decl
)
6335 /* If !DECL_EXTERNAL then DECL is being defined. In the
6336 case of a static data member initialized inside the
6337 class-specifier, there can be an initializer even if DECL
6338 is *not* defined. */
6339 && (!DECL_EXTERNAL (decl
) || init
))
6341 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6344 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6345 /* Allow libjava/prims.cc define primitive classes. */
6346 if (init
!= NULL_TREE
6347 || jclass
== NULL_TREE
6348 || TREE_CODE (jclass
) != TYPE_DECL
6349 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6350 || !same_type_ignoring_top_level_qualifiers_p
6351 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6352 error ("Java object %qD not allocated with %<new%>", decl
);
6355 cleanups
= make_tree_vector ();
6356 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6362 The memory occupied by any object of static storage
6363 duration is zero-initialized at program startup before
6364 any other initialization takes place.
6366 We cannot create an appropriate initializer until after
6367 the type of DECL is finalized. If DECL_INITIAL is set,
6368 then the DECL is statically initialized, and any
6369 necessary zero-initialization has already been performed. */
6370 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6371 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6372 /*nelts=*/NULL_TREE
,
6373 /*static_storage_p=*/true);
6374 /* Remember that the initialization for this variable has
6376 DECL_INITIALIZED_P (decl
) = 1;
6377 /* This declaration is the definition of this variable,
6378 unless we are initializing a static data member within
6379 the class specifier. */
6380 if (!DECL_EXTERNAL (decl
))
6381 var_definition_p
= true;
6383 /* If the variable has an array type, lay out the type, even if
6384 there is no initializer. It is valid to index through the
6385 array, and we must get TYPE_ALIGN set correctly on the array
6387 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6390 if (TREE_STATIC (decl
)
6391 && !at_function_scope_p ()
6392 && current_function_decl
== NULL
)
6393 /* So decl is a global variable or a static member of a
6394 non local class. Record the types it uses
6395 so that we can decide later to emit debug info for them. */
6396 record_types_used_by_current_var_decl (decl
);
6398 else if (TREE_CODE (decl
) == FIELD_DECL
6399 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6400 error ("non-static data member %qD has Java class type", decl
);
6402 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
6404 /* If the VLA bound is larger than half the address space, or less
6405 than zero, throw std::bad_array_length. */
6406 tree max
= convert (ssizetype
, TYPE_MAX_VALUE (TYPE_DOMAIN (type
)));
6407 /* C++1y says we should throw for length <= 0, but we have
6408 historically supported zero-length arrays. Let's treat that as an
6409 extension to be disabled by -std=c++NN. */
6410 int lower
= flag_iso
? 0 : -1;
6411 tree comp
= build2 (LT_EXPR
, boolean_type_node
, max
, ssize_int (lower
));
6412 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
6413 throw_bad_array_length (), void_zero_node
);
6414 finish_expr_stmt (comp
);
6417 /* Add this declaration to the statement-tree. This needs to happen
6418 after the call to check_initializer so that the DECL_EXPR for a
6419 reference temp is added before the DECL_EXPR for the reference itself. */
6420 if (DECL_FUNCTION_SCOPE_P (decl
))
6421 add_decl_expr (decl
);
6423 /* Let the middle end know about variables and functions -- but not
6424 static data members in uninstantiated class templates. */
6425 if (VAR_OR_FUNCTION_DECL_P (decl
))
6429 layout_var_decl (decl
);
6430 maybe_commonize_var (decl
);
6433 /* This needs to happen after the linkage is set. */
6434 determine_visibility (decl
);
6436 if (var_definition_p
&& TREE_STATIC (decl
))
6438 /* If a TREE_READONLY variable needs initialization
6439 at runtime, it is no longer readonly and we need to
6440 avoid MEM_READONLY_P being set on RTL created for it. */
6443 if (TREE_READONLY (decl
))
6444 TREE_READONLY (decl
) = 0;
6447 else if (was_readonly
)
6448 TREE_READONLY (decl
) = 1;
6450 /* Likewise if it needs destruction. */
6451 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6452 TREE_READONLY (decl
) = 0;
6455 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6457 /* Check for abstractness of the type. Notice that there is no
6458 need to strip array types here since the check for those types
6459 is already done within create_array_type_for_decl. */
6460 abstract_virtuals_error (decl
, type
);
6462 if (TREE_TYPE (decl
) == error_mark_node
)
6463 /* No initialization required. */
6465 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6469 if (init
== ridpointers
[(int)RID_DEFAULT
])
6471 /* An out-of-class default definition is defined at
6472 the point where it is explicitly defaulted. */
6473 if (DECL_DELETED_FN (decl
))
6474 maybe_explain_implicit_delete (decl
);
6475 else if (DECL_INITIAL (decl
) == error_mark_node
)
6476 synthesize_method (decl
);
6479 error ("function %q#D is initialized like a variable", decl
);
6481 /* else no initialization required. */
6483 else if (DECL_EXTERNAL (decl
)
6484 && ! (DECL_LANG_SPECIFIC (decl
)
6485 && DECL_NOT_REALLY_EXTERN (decl
)))
6488 DECL_INITIAL (decl
) = init
;
6490 /* A variable definition. */
6491 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6492 /* Initialize the local variable. */
6493 initialize_local_var (decl
, init
);
6495 /* If a variable is defined, and then a subsequent
6496 definition with external linkage is encountered, we will
6497 get here twice for the same variable. We want to avoid
6498 calling expand_static_init more than once. For variables
6499 that are not static data members, we can call
6500 expand_static_init only when we actually process the
6501 initializer. It is not legal to redeclare a static data
6502 member, so this issue does not arise in that case. */
6503 else if (var_definition_p
&& TREE_STATIC (decl
))
6504 expand_static_init (decl
, init
);
6507 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6508 reference, insert it in the statement-tree now. */
6512 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6513 push_cleanup (decl
, t
, false);
6514 release_tree_vector (cleanups
);
6518 TREE_READONLY (decl
) = 1;
6520 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6523 /* Returns a declaration for a VAR_DECL as if:
6525 extern "C" TYPE NAME;
6527 had been seen. Used to create compiler-generated global
6531 declare_global_var (tree name
, tree type
)
6535 push_to_top_level ();
6536 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6537 TREE_PUBLIC (decl
) = 1;
6538 DECL_EXTERNAL (decl
) = 1;
6539 DECL_ARTIFICIAL (decl
) = 1;
6540 /* If the user has explicitly declared this variable (perhaps
6541 because the code we are compiling is part of a low-level runtime
6542 library), then it is possible that our declaration will be merged
6543 with theirs by pushdecl. */
6544 decl
= pushdecl (decl
);
6545 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6546 pop_from_top_level ();
6551 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6552 if "__cxa_atexit" is not being used) corresponding to the function
6553 to be called when the program exits. */
6556 get_atexit_fn_ptr_type (void)
6560 if (!atexit_fn_ptr_type_node
)
6563 if (flag_use_cxa_atexit
6564 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6565 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6566 arg_type
= ptr_type_node
;
6568 /* The parameter to "atexit" is "void (*)(void)". */
6569 arg_type
= NULL_TREE
;
6571 fn_type
= build_function_type_list (void_type_node
,
6572 arg_type
, NULL_TREE
);
6573 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6576 return atexit_fn_ptr_type_node
;
6579 /* Returns a pointer to the `atexit' function. Note that if
6580 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6581 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6584 get_atexit_node (void)
6590 bool use_aeabi_atexit
;
6595 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6597 /* The declaration for `__cxa_atexit' is:
6599 int __cxa_atexit (void (*)(void *), void *, void *)
6601 We build up the argument types and then the function type
6603 tree argtype0
, argtype1
, argtype2
;
6605 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6606 /* First, build the pointer-to-function type for the first
6608 fn_ptr_type
= get_atexit_fn_ptr_type ();
6609 /* Then, build the rest of the argument types. */
6610 argtype2
= ptr_type_node
;
6611 if (use_aeabi_atexit
)
6613 argtype1
= fn_ptr_type
;
6614 argtype0
= ptr_type_node
;
6618 argtype1
= ptr_type_node
;
6619 argtype0
= fn_ptr_type
;
6621 /* And the final __cxa_atexit type. */
6622 fn_type
= build_function_type_list (integer_type_node
,
6623 argtype0
, argtype1
, argtype2
,
6625 if (use_aeabi_atexit
)
6626 name
= "__aeabi_atexit";
6628 name
= "__cxa_atexit";
6632 /* The declaration for `atexit' is:
6634 int atexit (void (*)());
6636 We build up the argument types and then the function type
6638 fn_ptr_type
= get_atexit_fn_ptr_type ();
6639 /* Build the final atexit type. */
6640 fn_type
= build_function_type_list (integer_type_node
,
6641 fn_ptr_type
, NULL_TREE
);
6645 /* Now, build the function declaration. */
6646 push_lang_context (lang_name_c
);
6647 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6648 mark_used (atexit_fndecl
);
6649 pop_lang_context ();
6650 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6655 /* Like get_atexit_node, but for thread-local cleanups. */
6658 get_thread_atexit_node (void)
6660 /* The declaration for `__cxa_thread_atexit' is:
6662 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6663 tree fn_type
= build_function_type_list (integer_type_node
,
6664 get_atexit_fn_ptr_type (),
6665 ptr_type_node
, ptr_type_node
,
6668 /* Now, build the function declaration. */
6669 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6670 ECF_LEAF
| ECF_NOTHROW
);
6671 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6674 /* Returns the __dso_handle VAR_DECL. */
6677 get_dso_handle_node (void)
6679 if (dso_handle_node
)
6680 return dso_handle_node
;
6682 /* Declare the variable. */
6683 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6686 #ifdef HAVE_GAS_HIDDEN
6687 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6688 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6691 return dso_handle_node
;
6694 /* Begin a new function with internal linkage whose job will be simply
6695 to destroy some particular variable. */
6697 static GTY(()) int start_cleanup_cnt
;
6700 start_cleanup_fn (void)
6705 bool use_cxa_atexit
= flag_use_cxa_atexit
6706 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6708 push_to_top_level ();
6710 /* No need to mangle this. */
6711 push_lang_context (lang_name_c
);
6713 /* Build the name of the function. */
6714 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6715 /* Build the function declaration. */
6716 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6717 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6718 /* It's a function with internal linkage, generated by the
6720 TREE_PUBLIC (fndecl
) = 0;
6721 DECL_ARTIFICIAL (fndecl
) = 1;
6722 /* Make the function `inline' so that it is only emitted if it is
6723 actually needed. It is unlikely that it will be inlined, since
6724 it is only called via a function pointer, but we avoid unnecessary
6725 emissions this way. */
6726 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6727 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6728 /* Build the parameter. */
6733 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6734 DECL_CONTEXT (parmdecl
) = fndecl
;
6735 TREE_USED (parmdecl
) = 1;
6736 DECL_READ_P (parmdecl
) = 1;
6737 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6741 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6743 pop_lang_context ();
6745 return current_function_decl
;
6748 /* Finish the cleanup function begun by start_cleanup_fn. */
6751 end_cleanup_fn (void)
6753 expand_or_defer_fn (finish_function (0));
6755 pop_from_top_level ();
6758 /* Generate code to handle the destruction of DECL, an object with
6759 static storage duration. */
6762 register_dtor_fn (tree decl
)
6769 bool ob_parm
, dso_parm
, use_dtor
;
6770 tree arg0
, arg1
, arg2
;
6773 type
= TREE_TYPE (decl
);
6774 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6775 return void_zero_node
;
6777 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6778 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6779 destructor to "__cxa_atexit"; we don't have to build a temporary
6780 function to do the cleanup. */
6781 dso_parm
= (flag_use_cxa_atexit
6782 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6783 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6784 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6789 /* Find the destructor. */
6790 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6791 gcc_assert (idx
>= 0);
6792 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6793 /* Make sure it is accessible. */
6794 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6795 tf_warning_or_error
);
6799 /* Call build_cleanup before we enter the anonymous function so
6800 that any access checks will be done relative to the current
6801 scope, rather than the scope of the anonymous function. */
6802 build_cleanup (decl
);
6804 /* Now start the function. */
6805 cleanup
= start_cleanup_fn ();
6807 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6808 to the original function, rather than the anonymous one. That
6809 will make the back end think that nested functions are in use,
6810 which causes confusion. */
6811 push_deferring_access_checks (dk_no_check
);
6812 fcall
= build_cleanup (decl
);
6813 pop_deferring_access_checks ();
6815 /* Create the body of the anonymous function. */
6816 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6817 finish_expr_stmt (fcall
);
6818 finish_compound_stmt (compound_stmt
);
6822 /* Call atexit with the cleanup function. */
6823 mark_used (cleanup
);
6824 cleanup
= build_address (cleanup
);
6826 if (DECL_THREAD_LOCAL_P (decl
))
6827 atex_node
= get_thread_atexit_node ();
6829 atex_node
= get_atexit_node ();
6833 /* We must convert CLEANUP to the type that "__cxa_atexit"
6835 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6836 /* "__cxa_atexit" will pass the address of DECL to the
6837 cleanup function. */
6839 addr
= build_address (decl
);
6840 /* The declared type of the parameter to "__cxa_atexit" is
6841 "void *". For plain "T*", we could just let the
6842 machinery in cp_build_function_call convert it -- but if the
6843 type is "cv-qualified T *", then we need to convert it
6844 before passing it in, to avoid spurious errors. */
6845 addr
= build_nop (ptr_type_node
, addr
);
6848 /* Since the cleanup functions we build ignore the address
6849 they're given, there's no reason to pass the actual address
6850 in, and, in general, it's cheaper to pass NULL than any
6852 addr
= null_pointer_node
;
6855 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6856 tf_warning_or_error
);
6858 /* Just pass NULL to the dso handle parm if we don't actually
6859 have a DSO handle on this target. */
6860 arg2
= null_pointer_node
;
6866 if (!DECL_THREAD_LOCAL_P (decl
)
6867 && targetm
.cxx
.use_aeabi_atexit ())
6883 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6884 arg0
, arg1
, arg2
, NULL_TREE
);
6887 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6888 is its initializer. Generate code to handle the construction
6889 and destruction of DECL. */
6892 expand_static_init (tree decl
, tree init
)
6894 gcc_assert (VAR_P (decl
));
6895 gcc_assert (TREE_STATIC (decl
));
6897 /* Some variables require no dynamic initialization. */
6899 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6902 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6903 && !DECL_FUNCTION_SCOPE_P (decl
))
6906 error ("non-local variable %qD declared %<__thread%> "
6907 "needs dynamic initialization", decl
);
6909 error ("non-local variable %qD declared %<__thread%> "
6910 "has a non-trivial destructor", decl
);
6911 static bool informed
;
6914 inform (DECL_SOURCE_LOCATION (decl
),
6915 "C++11 %<thread_local%> allows dynamic initialization "
6922 if (DECL_FUNCTION_SCOPE_P (decl
))
6924 /* Emit code to perform this initialization but once. */
6925 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6926 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6927 tree guard
, guard_addr
;
6929 /* We don't need thread-safety code for thread-local vars. */
6930 bool thread_guard
= (flag_threadsafe_statics
6931 && !DECL_THREAD_LOCAL_P (decl
));
6933 /* Emit code to perform this initialization but once. This code
6936 static <type> guard;
6937 if (!guard.first_byte) {
6938 if (__cxa_guard_acquire (&guard)) {
6941 // Do initialization.
6942 flag = true; __cxa_guard_release (&guard);
6943 // Register variable for destruction at end of program.
6945 if (!flag) __cxa_guard_abort (&guard);
6949 Note that the `flag' variable is only set to 1 *after* the
6950 initialization is complete. This ensures that an exception,
6951 thrown during the construction, will cause the variable to
6952 reinitialized when we pass through this code again, as per:
6956 If the initialization exits by throwing an exception, the
6957 initialization is not complete, so it will be tried again
6958 the next time control enters the declaration.
6960 This process should be thread-safe, too; multiple threads
6961 should not be able to initialize the variable more than
6964 /* Create the guard variable. */
6965 guard
= get_guard (decl
);
6967 /* This optimization isn't safe on targets with relaxed memory
6968 consistency. On such targets we force synchronization in
6969 __cxa_guard_acquire. */
6970 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6972 /* Begin the conditional initialization. */
6973 if_stmt
= begin_if_stmt ();
6974 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6975 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6980 tree vfntype
= NULL_TREE
;
6981 tree acquire_name
, release_name
, abort_name
;
6982 tree acquire_fn
, release_fn
, abort_fn
;
6983 guard_addr
= build_address (guard
);
6985 acquire_name
= get_identifier ("__cxa_guard_acquire");
6986 release_name
= get_identifier ("__cxa_guard_release");
6987 abort_name
= get_identifier ("__cxa_guard_abort");
6988 acquire_fn
= identifier_global_value (acquire_name
);
6989 release_fn
= identifier_global_value (release_name
);
6990 abort_fn
= identifier_global_value (abort_name
);
6992 acquire_fn
= push_library_fn
6993 (acquire_name
, build_function_type_list (integer_type_node
,
6994 TREE_TYPE (guard_addr
),
6996 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
6997 if (!release_fn
|| !abort_fn
)
6998 vfntype
= build_function_type_list (void_type_node
,
6999 TREE_TYPE (guard_addr
),
7002 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7003 ECF_NOTHROW
| ECF_LEAF
);
7005 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7006 ECF_NOTHROW
| ECF_LEAF
);
7008 inner_if_stmt
= begin_if_stmt ();
7009 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7012 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7013 begin
= get_target_expr (boolean_false_node
);
7014 flag
= TARGET_EXPR_SLOT (begin
);
7016 TARGET_EXPR_CLEANUP (begin
)
7017 = build3 (COND_EXPR
, void_type_node
, flag
,
7019 build_call_n (abort_fn
, 1, guard_addr
));
7020 CLEANUP_EH_ONLY (begin
) = 1;
7022 /* Do the initialization itself. */
7023 init
= add_stmt_to_compound (begin
, init
);
7024 init
= add_stmt_to_compound
7025 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7026 init
= add_stmt_to_compound
7027 (init
, build_call_n (release_fn
, 1, guard_addr
));
7030 init
= add_stmt_to_compound (init
, set_guard (guard
));
7032 /* Use atexit to register a function for destroying this static
7034 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7036 finish_expr_stmt (init
);
7040 finish_compound_stmt (inner_then_clause
);
7041 finish_then_clause (inner_if_stmt
);
7042 finish_if_stmt (inner_if_stmt
);
7045 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7047 finish_compound_stmt (then_clause
);
7048 finish_then_clause (if_stmt
);
7049 finish_if_stmt (if_stmt
);
7052 else if (DECL_THREAD_LOCAL_P (decl
))
7053 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7055 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7059 /* Make TYPE a complete type based on INITIAL_VALUE.
7060 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7061 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7062 3 if the initializer list is empty (in pedantic mode). */
7065 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7068 tree type
, elt_type
;
7072 unsigned HOST_WIDE_INT i
;
7075 /* An array of character type can be initialized from a
7076 brace-enclosed string constant.
7078 FIXME: this code is duplicated from reshape_init. Probably
7079 we should just call reshape_init here? */
7080 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7081 && TREE_CODE (initial_value
) == CONSTRUCTOR
7082 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7084 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7085 tree value
= (*v
)[0].value
;
7087 if (TREE_CODE (value
) == STRING_CST
7088 && v
->length () == 1)
7089 initial_value
= value
;
7092 /* If any of the elements are parameter packs, we can't actually
7093 complete this type now because the array size is dependent. */
7094 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7096 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7099 if (PACK_EXPANSION_P (value
))
7105 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7107 /* We can create the array before the element type is complete, which
7108 means that we didn't have these two bits set in the original type
7109 either. In completing the type, we are expected to propagate these
7110 bits. See also complete_type which does the same thing for arrays
7113 if (TYPE_DOMAIN (type
))
7115 elt_type
= TREE_TYPE (type
);
7116 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7117 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7118 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7124 /* As above, but either give an error or reject zero-size arrays, depending
7128 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7129 bool do_default
, tsubst_flags_t complain
)
7132 bool sfinae
= !(complain
& tf_error
);
7133 /* In SFINAE context we can't be lenient about zero-size arrays. */
7136 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7142 /* Not an error. */;
7143 else if (failure
== 1)
7144 error ("initializer fails to determine size of %qT", *ptype
);
7145 else if (failure
== 2)
7148 error ("array size missing in %qT", *ptype
);
7150 else if (failure
== 3)
7151 error ("zero-size array %qT", *ptype
);
7152 *ptype
= error_mark_node
;
7157 /* Return zero if something is declared to be a member of type
7158 CTYPE when in the context of CUR_TYPE. STRING is the error
7159 message to print in that case. Otherwise, quietly return 1. */
7162 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7164 if (ctype
&& ctype
!= cur_type
)
7166 if (flags
== DTOR_FLAG
)
7167 error ("destructor for alien class %qT cannot be a member", ctype
);
7169 error ("constructor for alien class %qT cannot be a member", ctype
);
7175 /* Subroutine of `grokdeclarator'. */
7177 /* Generate errors possibly applicable for a given set of specifiers.
7178 This is for ARM $7.1.2. */
7181 bad_specifiers (tree object
,
7182 enum bad_spec_place type
,
7193 error ("%qD declared as a %<virtual%> variable", object
);
7195 error ("%qD declared as an %<inline%> variable", object
);
7197 error ("%<const%> and %<volatile%> function specifiers on "
7198 "%qD invalid in variable declaration", object
);
7202 error ("%qD declared as a %<virtual%> parameter", object
);
7204 error ("%qD declared as an %<inline%> parameter", object
);
7206 error ("%<const%> and %<volatile%> function specifiers on "
7207 "%qD invalid in parameter declaration", object
);
7211 error ("%qD declared as a %<virtual%> type", object
);
7213 error ("%qD declared as an %<inline%> type", object
);
7215 error ("%<const%> and %<volatile%> function specifiers on "
7216 "%qD invalid in type declaration", object
);
7220 error ("%qD declared as a %<virtual%> field", object
);
7222 error ("%qD declared as an %<inline%> field", object
);
7224 error ("%<const%> and %<volatile%> function specifiers on "
7225 "%qD invalid in field declaration", object
);
7231 error ("%q+D declared as a friend", object
);
7233 && (TREE_CODE (object
) == TYPE_DECL
7234 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7235 && !TYPE_REFFN_P (TREE_TYPE (object
))
7236 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7237 error ("%q+D declared with an exception specification", object
);
7240 /* DECL is a member function or static data member and is presently
7241 being defined. Check that the definition is taking place in a
7245 check_class_member_definition_namespace (tree decl
)
7247 /* These checks only apply to member functions and static data
7249 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7250 /* We check for problems with specializations in pt.c in
7251 check_specialization_namespace, where we can issue better
7253 if (processing_specialization
)
7255 /* There are no restrictions on the placement of
7256 explicit instantiations. */
7257 if (processing_explicit_instantiation
)
7261 A member function definition that appears outside of the
7262 class definition shall appear in a namespace scope enclosing
7263 the class definition.
7267 The definition for a static data member shall appear in a
7268 namespace scope enclosing the member's class definition. */
7269 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7270 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7271 decl
, DECL_CONTEXT (decl
));
7274 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7275 METHOD_TYPE for a non-static member function; QUALS are the
7276 cv-qualifiers that apply to the function. */
7279 build_this_parm (tree type
, cp_cv_quals quals
)
7284 cp_cv_quals this_quals
;
7286 if (CLASS_TYPE_P (type
))
7289 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7290 this_type
= build_pointer_type (this_type
);
7293 this_type
= type_of_this_parm (type
);
7294 /* The `this' parameter is implicitly `const'; it cannot be
7296 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7297 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7298 parm
= build_artificial_parm (this_identifier
, qual_type
);
7299 cp_apply_type_quals_to_decl (this_quals
, parm
);
7303 /* DECL is a static member function. Complain if it was declared
7304 with function-cv-quals. */
7307 check_static_quals (tree decl
, cp_cv_quals quals
)
7309 if (quals
!= TYPE_UNQUALIFIED
)
7310 error ("static member function %q#D declared with type qualifiers",
7314 /* Helper function. Replace the temporary this parameter injected
7315 during cp_finish_omp_declare_simd with the real this parameter. */
7318 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7320 tree this_parm
= (tree
) data
;
7321 if (TREE_CODE (*tp
) == PARM_DECL
7322 && DECL_NAME (*tp
) == this_identifier
7323 && *tp
!= this_parm
)
7325 else if (TYPE_P (*tp
))
7330 /* CTYPE is class type, or null if non-class.
7331 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7333 DECLARATOR is the function's name.
7334 PARMS is a chain of PARM_DECLs for the function.
7335 VIRTUALP is truthvalue of whether the function is virtual or not.
7336 FLAGS are to be passed through to `grokclassfn'.
7337 QUALS are qualifiers indicating whether the function is `const'
7339 RAISES is a list of exceptions that this function can raise.
7340 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7341 not look, and -1 if we should not call `grokclassfn' at all.
7343 SFK is the kind of special function (if any) for the new function.
7345 Returns `NULL_TREE' if something goes wrong, after issuing
7346 applicable error messages. */
7349 grokfndecl (tree ctype
,
7353 tree orig_declarator
,
7355 enum overload_flags flags
,
7357 cp_ref_qualifier rqual
,
7363 special_function_kind sfk
,
7368 location_t location
)
7371 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7375 type
= build_ref_qualified_type (type
, rqual
);
7377 type
= build_exception_variant (type
, raises
);
7379 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7381 /* If we have an explicit location, use it, otherwise use whatever
7382 build_lang_decl used (probably input_location). */
7383 if (location
!= UNKNOWN_LOCATION
)
7384 DECL_SOURCE_LOCATION (decl
) = location
;
7386 if (TREE_CODE (type
) == METHOD_TYPE
)
7389 parm
= build_this_parm (type
, quals
);
7390 DECL_CHAIN (parm
) = parms
;
7393 DECL_ARGUMENTS (decl
) = parms
;
7394 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7395 DECL_CONTEXT (t
) = decl
;
7396 /* Propagate volatile out from type to decl. */
7397 if (TYPE_VOLATILE (type
))
7398 TREE_THIS_VOLATILE (decl
) = 1;
7400 /* Setup decl according to sfk. */
7403 case sfk_constructor
:
7404 case sfk_copy_constructor
:
7405 case sfk_move_constructor
:
7406 DECL_CONSTRUCTOR_P (decl
) = 1;
7408 case sfk_destructor
:
7409 DECL_DESTRUCTOR_P (decl
) = 1;
7415 /* If pointers to member functions use the least significant bit to
7416 indicate whether a function is virtual, ensure a pointer
7417 to this function will have that bit clear. */
7418 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7419 && TREE_CODE (type
) == METHOD_TYPE
7420 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7421 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7424 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7428 ("defining explicit specialization %qD in friend declaration",
7432 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7433 tree args
= TREE_OPERAND (orig_declarator
, 1);
7435 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7437 /* Something like `template <class T> friend void f<T>()'. */
7438 error ("invalid use of template-id %qD in declaration "
7439 "of primary template",
7445 /* A friend declaration of the form friend void f<>(). Record
7446 the information in the TEMPLATE_ID_EXPR. */
7447 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7449 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7450 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7452 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7453 if (TREE_PURPOSE (t
)
7454 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7456 error ("default arguments are not allowed in declaration "
7457 "of friend template specialization %qD",
7463 error ("%<inline%> is not allowed in declaration of friend "
7464 "template specialization %qD",
7467 error ("%<constexpr%> is not allowed in declaration of friend "
7468 "template specialization %qD",
7475 /* If this decl has namespace scope, set that up. */
7477 set_decl_namespace (decl
, in_namespace
, friendp
);
7479 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7481 /* `main' and builtins have implicit 'C' linkage. */
7482 if ((MAIN_NAME_P (declarator
)
7483 || (IDENTIFIER_LENGTH (declarator
) > 10
7484 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7485 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7486 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7487 || (targetcm
.cxx_implicit_extern_c
7488 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7489 && current_lang_name
== lang_name_cplusplus
7490 && ctype
== NULL_TREE
7491 && DECL_FILE_SCOPE_P (decl
))
7492 SET_DECL_LANGUAGE (decl
, lang_c
);
7494 /* Should probably propagate const out from type to decl I bet (mrs). */
7497 DECL_STATIC_FUNCTION_P (decl
) = 1;
7498 DECL_CONTEXT (decl
) = ctype
;
7503 DECL_CONTEXT (decl
) = ctype
;
7505 check_class_member_definition_namespace (decl
);
7508 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7510 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7511 error ("cannot declare %<::main%> to be a template");
7513 error ("cannot declare %<::main%> to be inline");
7515 error ("cannot declare %<::main%> to be constexpr");
7517 error ("cannot declare %<::main%> to be static");
7522 /* Members of anonymous types and local classes have no linkage; make
7523 them internal. If a typedef is made later, this will be changed. */
7524 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7525 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7528 if (publicp
&& cxx_dialect
== cxx98
)
7530 /* [basic.link]: A name with no linkage (notably, the name of a class
7531 or enumeration declared in a local scope) shall not be used to
7532 declare an entity with linkage.
7534 DR 757 relaxes this restriction for C++0x. */
7535 t
= no_linkage_check (TREE_TYPE (decl
),
7536 /*relaxed_p=*/false);
7539 if (TYPE_ANONYMOUS_P (t
))
7541 if (DECL_EXTERN_C_P (decl
))
7542 /* Allow this; it's pretty common in C. */;
7545 permerror (input_location
, "anonymous type with no linkage "
7546 "used to declare function %q#D with linkage",
7548 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7549 permerror (input_location
, "%q+#D does not refer to the unqualified "
7550 "type, so it is not used for linkage",
7555 permerror (input_location
, "type %qT with no linkage used to "
7556 "declare function %q#D with linkage", t
, decl
);
7560 TREE_PUBLIC (decl
) = publicp
;
7563 DECL_INTERFACE_KNOWN (decl
) = 1;
7564 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7567 /* If the declaration was declared inline, mark it as such. */
7569 DECL_DECLARED_INLINE_P (decl
) = 1;
7571 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7573 DECL_EXTERNAL (decl
) = 1;
7574 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7579 ? G_("static member function %qD cannot have cv-qualifier")
7580 : G_("non-member function %qD cannot have cv-qualifier"),
7582 quals
= TYPE_UNQUALIFIED
;
7588 ? G_("static member function %qD cannot have ref-qualifier")
7589 : G_("non-member function %qD cannot have ref-qualifier"),
7591 rqual
= REF_QUAL_NONE
;
7595 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7596 && !grok_op_properties (decl
, /*complain=*/true))
7598 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7600 bool long_long_unsigned_p
;
7602 const char *suffix
= NULL
;
7603 /* [over.literal]/6: Literal operators shall not have C linkage. */
7604 if (DECL_LANGUAGE (decl
) == lang_c
)
7606 error ("literal operator with C linkage");
7610 if (DECL_NAMESPACE_SCOPE_P (decl
))
7612 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7615 error ("%qD has invalid argument list", decl
);
7619 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7620 if (long_long_unsigned_p
)
7622 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7623 warning (0, "integer suffix %<%s%>"
7624 " shadowed by implementation", suffix
);
7626 else if (long_double_p
)
7628 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7629 warning (0, "floating point suffix %<%s%>"
7630 " shadowed by implementation", suffix
);
7635 error ("%qD must be a non-member function", decl
);
7641 /* Make the init_value nonzero so pushdecl knows this is not
7642 tentative. error_mark_node is replaced later with the BLOCK. */
7643 DECL_INITIAL (decl
) = error_mark_node
;
7645 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7646 TREE_NOTHROW (decl
) = 1;
7650 /* Adjust "omp declare simd" attributes. */
7651 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7655 for (attr
= ods
; attr
;
7656 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7658 if (TREE_CODE (type
) == METHOD_TYPE
)
7659 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7660 DECL_ARGUMENTS (decl
), NULL
);
7661 if (TREE_VALUE (attr
) != NULL_TREE
)
7663 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7664 cl
= c_omp_declare_simd_clauses_to_numbers
7665 (DECL_ARGUMENTS (decl
), cl
);
7667 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7669 TREE_VALUE (attr
) = NULL_TREE
;
7675 /* Caller will do the rest of this. */
7679 if (ctype
!= NULL_TREE
)
7680 grokclassfn (ctype
, decl
, flags
);
7683 if (cxx_dialect
>= cxx11
7684 && DECL_DESTRUCTOR_P (decl
)
7685 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7686 && !processing_template_decl
)
7687 deduce_noexcept_on_destructor (decl
);
7689 decl
= check_explicit_specialization (orig_declarator
, decl
,
7692 4 * (friendp
!= 0));
7693 if (decl
== error_mark_node
)
7696 if (DECL_STATIC_FUNCTION_P (decl
))
7697 check_static_quals (decl
, quals
);
7701 cplus_decl_attributes (&decl
, *attrlist
, 0);
7702 *attrlist
= NULL_TREE
;
7705 /* Check main's type after attributes have been applied. */
7706 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7708 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7711 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7713 error ("%<::main%> must return %<int%>");
7714 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7715 TREE_TYPE (decl
) = newtype
;
7718 check_main_parameter_types (decl
);
7721 if (ctype
!= NULL_TREE
7722 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7725 tree old_decl
= check_classfn (ctype
, decl
,
7726 (processing_template_decl
7727 > template_class_depth (ctype
))
7728 ? current_template_parms
7731 if (old_decl
== error_mark_node
)
7739 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7740 /* Because grokfndecl is always supposed to return a
7741 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7742 here. We depend on our callers to figure out that its
7743 really a template that's being returned. */
7744 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7746 if (DECL_STATIC_FUNCTION_P (old_decl
)
7747 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7749 /* Remove the `this' parm added by grokclassfn. */
7750 revert_static_member_fn (decl
);
7751 check_static_quals (decl
, quals
);
7753 if (DECL_ARTIFICIAL (old_decl
))
7755 error ("definition of implicitly-declared %qD", old_decl
);
7758 else if (DECL_DEFAULTED_FN (old_decl
))
7760 error ("definition of explicitly-defaulted %q+D", decl
);
7761 error ("%q+#D explicitly defaulted here", old_decl
);
7765 /* Since we've smashed OLD_DECL to its
7766 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7767 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7768 decl
= DECL_TEMPLATE_RESULT (decl
);
7770 /* Attempt to merge the declarations. This can fail, in
7771 the case of some invalid specialization declarations. */
7772 pushed_scope
= push_scope (ctype
);
7773 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7775 pop_scope (pushed_scope
);
7778 error ("no %q#D member function declared in class %qT",
7786 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7789 if (ctype
== NULL_TREE
|| check
)
7793 DECL_VIRTUAL_P (decl
) = 1;
7798 /* decl is a FUNCTION_DECL.
7799 specifiers are the parsed virt-specifiers.
7801 Set flags to reflect the virt-specifiers.
7806 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7808 if (decl
== NULL_TREE
)
7810 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7811 DECL_OVERRIDE_P (decl
) = 1;
7812 if (specifiers
& VIRT_SPEC_FINAL
)
7813 DECL_FINAL_P (decl
) = 1;
7817 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7818 the linkage that DECL will receive in the object file. */
7821 set_linkage_for_static_data_member (tree decl
)
7823 /* A static data member always has static storage duration and
7824 external linkage. Note that static data members are forbidden in
7825 local classes -- the only situation in which a class has
7826 non-external linkage. */
7827 TREE_PUBLIC (decl
) = 1;
7828 TREE_STATIC (decl
) = 1;
7829 /* For non-template classes, static data members are always put
7830 out in exactly those files where they are defined, just as
7831 with ordinary namespace-scope variables. */
7832 if (!processing_template_decl
)
7833 DECL_INTERFACE_KNOWN (decl
) = 1;
7836 /* Create a VAR_DECL named NAME with the indicated TYPE.
7838 If SCOPE is non-NULL, it is the class type or namespace containing
7839 the variable. If SCOPE is NULL, the variable should is created in
7840 the innermost enclosings scope. */
7843 grokvardecl (tree type
,
7845 const cp_decl_specifier_seq
*declspecs
,
7851 tree explicit_scope
;
7853 gcc_assert (!name
|| identifier_p (name
));
7855 /* Compute the scope in which to place the variable, but remember
7856 whether or not that scope was explicitly specified by the user. */
7857 explicit_scope
= scope
;
7860 /* An explicit "extern" specifier indicates a namespace-scope
7862 if (declspecs
->storage_class
== sc_extern
)
7863 scope
= current_decl_namespace ();
7864 else if (!at_function_scope_p ())
7865 scope
= current_scope ();
7869 && (/* If the variable is a namespace-scope variable declared in a
7870 template, we need DECL_LANG_SPECIFIC. */
7871 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7872 /* Similarly for namespace-scope variables with language linkage
7874 || (TREE_CODE (scope
) == NAMESPACE_DECL
7875 && current_lang_name
!= lang_name_cplusplus
)
7876 /* Similarly for static data members. */
7878 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7880 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7882 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7883 set_decl_namespace (decl
, explicit_scope
, 0);
7885 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7887 if (declspecs
->storage_class
== sc_extern
)
7889 DECL_THIS_EXTERN (decl
) = 1;
7890 DECL_EXTERNAL (decl
) = !initialized
;
7893 if (DECL_CLASS_SCOPE_P (decl
))
7895 set_linkage_for_static_data_member (decl
);
7896 /* This function is only called with out-of-class definitions. */
7897 DECL_EXTERNAL (decl
) = 0;
7898 check_class_member_definition_namespace (decl
);
7900 /* At top level, either `static' or no s.c. makes a definition
7901 (perhaps tentative), and absence of `static' makes it public. */
7902 else if (toplevel_bindings_p ())
7904 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7905 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7906 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7908 /* Not at top level, only `static' makes a static definition. */
7911 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7912 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7915 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7917 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7918 if (declspecs
->gnu_thread_keyword_p
)
7919 DECL_GNU_TLS_P (decl
) = true;
7922 /* If the type of the decl has no linkage, make sure that we'll
7923 notice that in mark_used. */
7924 if (cxx_dialect
> cxx98
7925 && decl_linkage (decl
) != lk_none
7926 && DECL_LANG_SPECIFIC (decl
) == NULL
7927 && !DECL_EXTERN_C_P (decl
)
7928 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7929 retrofit_lang_decl (decl
);
7931 if (TREE_PUBLIC (decl
))
7933 /* [basic.link]: A name with no linkage (notably, the name of a class
7934 or enumeration declared in a local scope) shall not be used to
7935 declare an entity with linkage.
7937 DR 757 relaxes this restriction for C++0x. */
7938 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7939 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7942 if (TYPE_ANONYMOUS_P (t
))
7944 if (DECL_EXTERN_C_P (decl
))
7945 /* Allow this; it's pretty common in C. */
7949 /* DRs 132, 319 and 389 seem to indicate types with
7950 no linkage can only be used to declare extern "C"
7951 entities. Since it's not always an error in the
7952 ISO C++ 90 Standard, we only issue a warning. */
7953 warning (0, "anonymous type with no linkage used to declare "
7954 "variable %q#D with linkage", decl
);
7955 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7956 warning (0, "%q+#D does not refer to the unqualified "
7957 "type, so it is not used for linkage",
7962 warning (0, "type %qT with no linkage used to declare variable "
7963 "%q#D with linkage", t
, decl
);
7967 DECL_INTERFACE_KNOWN (decl
) = 1;
7972 /* Create and return a canonical pointer to member function type, for
7973 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7976 build_ptrmemfunc_type (tree type
)
7980 tree unqualified_variant
= NULL_TREE
;
7982 if (type
== error_mark_node
)
7985 /* If a canonical type already exists for this type, use it. We use
7986 this method instead of type_hash_canon, because it only does a
7987 simple equality check on the list of field members. */
7989 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7992 /* Make sure that we always have the unqualified pointer-to-member
7994 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7996 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7998 t
= make_class_type (RECORD_TYPE
);
7999 xref_basetypes (t
, NULL_TREE
);
8001 /* Let the front end know this is a pointer to member function... */
8002 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8003 /* ... and not really a class type. */
8004 SET_CLASS_TYPE_P (t
, 0);
8006 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8009 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8011 DECL_CHAIN (field
) = fields
;
8014 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8016 /* Zap out the name so that the back end will give us the debugging
8017 information for this anonymous RECORD_TYPE. */
8018 TYPE_NAME (t
) = NULL_TREE
;
8020 /* If this is not the unqualified form of this pointer-to-member
8021 type, set the TYPE_MAIN_VARIANT for this type to be the
8022 unqualified type. Since they are actually RECORD_TYPEs that are
8023 not variants of each other, we must do this manually.
8024 As we just built a new type there is no need to do yet another copy. */
8025 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8027 int type_quals
= cp_type_quals (type
);
8028 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
8029 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
8030 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
8031 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8032 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8033 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8034 TREE_TYPE (TYPE_BINFO (t
)) = t
;
8037 /* Cache this pointer-to-member type so that we can find it again
8039 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8041 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8042 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8043 else if (TYPE_CANONICAL (type
) != type
)
8044 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8049 /* Create and return a pointer to data member type. */
8052 build_ptrmem_type (tree class_type
, tree member_type
)
8054 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8056 cp_cv_quals quals
= type_memfn_quals (member_type
);
8057 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8058 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8059 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8063 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8064 return build_offset_type (class_type
, member_type
);
8068 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8069 Check to see that the definition is valid. Issue appropriate error
8070 messages. Return 1 if the definition is particularly bad, or 0
8074 check_static_variable_definition (tree decl
, tree type
)
8076 /* Can't check yet if we don't know the type. */
8077 if (dependent_type_p (type
))
8079 /* If DECL is declared constexpr, we'll do the appropriate checks
8080 in check_initializer. */
8081 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8083 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8085 if (!COMPLETE_TYPE_P (type
))
8086 error ("in-class initialization of static data member %q#D of "
8087 "incomplete type", decl
);
8088 else if (literal_type_p (type
))
8089 permerror (input_location
,
8090 "%<constexpr%> needed for in-class initialization of "
8091 "static data member %q#D of non-integral type", decl
);
8093 error ("in-class initialization of static data member %q#D of "
8094 "non-literal type", decl
);
8098 /* Motion 10 at San Diego: If a static const integral data member is
8099 initialized with an integral constant expression, the initializer
8100 may appear either in the declaration (within the class), or in
8101 the definition, but not both. If it appears in the class, the
8102 member is a member constant. The file-scope definition is always
8104 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8106 error ("invalid in-class initialization of static data member "
8107 "of non-integral type %qT",
8111 else if (!CP_TYPE_CONST_P (type
))
8112 error ("ISO C++ forbids in-class initialization of non-const "
8113 "static member %qD",
8115 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8116 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8117 "%qD of non-integral type %qT", decl
, type
);
8122 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8123 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8124 expressions out into temporary variables so that walk_tree doesn't
8125 step into them (c++/15764). */
8128 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8130 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8131 tree expr
= *expr_p
;
8132 if (TREE_CODE (expr
) == SAVE_EXPR
)
8134 tree op
= TREE_OPERAND (expr
, 0);
8135 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8136 if (TREE_SIDE_EFFECTS (op
))
8137 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8140 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8145 /* Entry point for the above. */
8148 stabilize_vla_size (tree size
)
8150 struct pointer_set_t
*pset
= pointer_set_create ();
8151 /* Break out any function calls into temporary variables. */
8152 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8153 pointer_set_destroy (pset
);
8156 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8157 not inside of SAVE_EXPR and fold them. */
8160 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8162 tree expr
= *expr_p
;
8163 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8165 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8167 *(bool *)data
= true;
8168 if (SIZEOF_EXPR_TYPE_P (expr
))
8169 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8170 SIZEOF_EXPR
, false);
8171 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8172 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8175 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8177 if (expr
== error_mark_node
)
8178 expr
= size_one_node
;
8185 /* Given the SIZE (i.e., number of elements) in an array, compute an
8186 appropriate index type for the array. If non-NULL, NAME is the
8187 name of the thing being declared. */
8190 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8194 tree abi_1_itype
= NULL_TREE
;
8196 if (error_operand_p (size
))
8197 return error_mark_node
;
8199 if (!type_dependent_expression_p (size
))
8201 tree type
= TREE_TYPE (size
);
8203 mark_rvalue_use (size
);
8205 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8206 && TREE_SIDE_EFFECTS (size
))
8207 /* In C++98, we mark a non-constant array bound with a magic
8208 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8211 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8213 if (CLASS_TYPE_P (type
)
8214 && CLASSTYPE_LITERAL_P (type
))
8216 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8219 if (!(complain
& tf_error
))
8220 return error_mark_node
;
8222 error ("size of array %qD has non-integral type %qT",
8225 error ("size of array has non-integral type %qT", type
);
8226 size
= integer_one_node
;
8228 if (size
== error_mark_node
)
8229 return error_mark_node
;
8230 type
= TREE_TYPE (size
);
8231 /* We didn't support this case in GCC 3.2, so don't bother
8232 trying to model it now in ABI v1. */
8233 abi_1_itype
= error_mark_node
;
8236 size
= maybe_constant_value (size
);
8237 if (!TREE_CONSTANT (size
))
8241 if (error_operand_p (size
))
8242 return error_mark_node
;
8244 /* The array bound must be an integer type. */
8245 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8247 if (!(complain
& tf_error
))
8248 return error_mark_node
;
8250 error ("size of array %qD has non-integral type %qT", name
, type
);
8252 error ("size of array has non-integral type %qT", type
);
8253 size
= integer_one_node
;
8254 type
= TREE_TYPE (size
);
8258 /* A type is dependent if it is...an array type constructed from any
8259 dependent type or whose size is specified by a constant expression
8260 that is value-dependent. */
8261 /* We can only call value_dependent_expression_p on integral constant
8262 expressions; treat non-constant expressions as dependent, too. */
8263 if (processing_template_decl
8264 && (type_dependent_expression_p (size
)
8265 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8267 /* We cannot do any checking for a SIZE that isn't known to be
8268 constant. Just build the index type and mark that it requires
8269 structural equality checks. */
8270 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8271 size
, size_one_node
));
8272 TYPE_DEPENDENT_P (itype
) = 1;
8273 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8274 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8278 if (!abi_version_at_least (2) && processing_template_decl
8279 && abi_1_itype
== NULL_TREE
)
8280 /* For abi-1, we handled all instances in templates the same way,
8281 even when they were non-dependent. This affects the manglings
8282 produced. So, we do the normal checking for non-dependent
8283 sizes, but at the end we'll return the same type that abi-1
8284 would have, but with TYPE_CANONICAL set to the "right"
8285 value that the current ABI would provide. */
8286 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8287 osize
, integer_one_node
));
8289 /* Normally, the array-bound will be a constant. */
8290 if (TREE_CODE (size
) == INTEGER_CST
)
8292 /* Check to see if the array bound overflowed. Make that an
8293 error, no matter how generous we're being. */
8294 constant_expression_error (size
);
8296 /* An array must have a positive number of elements. */
8297 if (INT_CST_LT (size
, integer_zero_node
))
8299 if (!(complain
& tf_error
))
8300 return error_mark_node
;
8302 error ("size of array %qD is negative", name
);
8304 error ("size of array is negative");
8305 size
= integer_one_node
;
8307 /* As an extension we allow zero-sized arrays. */
8308 else if (integer_zerop (size
))
8310 if (!(complain
& tf_error
))
8311 /* We must fail if performing argument deduction (as
8312 indicated by the state of complain), so that
8313 another substitution can be found. */
8314 return error_mark_node
;
8315 else if (in_system_header
)
8316 /* Allow them in system headers because glibc uses them. */;
8318 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8320 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8323 else if (TREE_CONSTANT (size
)
8324 /* We don't allow VLAs at non-function scopes, or during
8325 tentative template substitution. */
8326 || !at_function_scope_p ()
8327 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8329 if (!(complain
& tf_error
))
8330 return error_mark_node
;
8331 /* `(int) &fn' is not a valid array bound. */
8333 error ("size of array %qD is not an integral constant-expression",
8336 error ("size of array is not an integral constant-expression");
8337 size
= integer_one_node
;
8339 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8342 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8344 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8346 else if (warn_vla
> 0)
8350 "variable length array %qD is used", name
);
8353 "variable length array is used");
8356 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8357 /* A variable sized array. */
8358 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8361 HOST_WIDE_INT saved_processing_template_decl
;
8363 /* Compute the index of the largest element in the array. It is
8364 one less than the number of elements in the array. We save
8365 and restore PROCESSING_TEMPLATE_DECL so that computations in
8366 cp_build_binary_op will be appropriately folded. */
8367 saved_processing_template_decl
= processing_template_decl
;
8368 processing_template_decl
= 0;
8369 itype
= cp_build_binary_op (input_location
,
8371 cp_convert (ssizetype
, size
, complain
),
8372 cp_convert (ssizetype
, integer_one_node
,
8375 itype
= fold (itype
);
8376 processing_template_decl
= saved_processing_template_decl
;
8378 if (!TREE_CONSTANT (itype
))
8380 /* A variable sized array. */
8381 itype
= variable_size (itype
);
8382 if (TREE_CODE (itype
) != SAVE_EXPR
)
8384 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8385 they might survive till gimplification. */
8386 tree newitype
= itype
;
8388 cp_walk_tree_without_duplicates (&newitype
,
8389 fold_sizeof_expr_r
, &found
);
8391 itype
= variable_size (fold (newitype
));
8394 /* Make sure that there was no overflow when creating to a signed
8395 index type. (For example, on a 32-bit machine, an array with
8396 size 2^32 - 1 is too big.) */
8397 else if (TREE_CODE (itype
) == INTEGER_CST
8398 && TREE_OVERFLOW (itype
))
8400 if (!(complain
& tf_error
))
8401 return error_mark_node
;
8402 error ("overflow in array dimension");
8403 TREE_OVERFLOW (itype
) = 0;
8407 /* Create and return the appropriate index type. */
8408 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8410 tree t
= build_index_type (itype
);
8411 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8412 itype
= abi_1_itype
;
8415 itype
= build_index_type (itype
);
8417 /* If the index type were dependent, we would have returned early, so
8418 remember that it isn't. */
8419 TYPE_DEPENDENT_P (itype
) = 0;
8420 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8424 /* Returns the scope (if any) in which the entity declared by
8425 DECLARATOR will be located. If the entity was declared with an
8426 unqualified name, NULL_TREE is returned. */
8429 get_scope_of_declarator (const cp_declarator
*declarator
)
8431 while (declarator
&& declarator
->kind
!= cdk_id
)
8432 declarator
= declarator
->declarator
;
8434 /* If the declarator-id is a SCOPE_REF, the scope in which the
8435 declaration occurs is the first operand. */
8437 && declarator
->u
.id
.qualifying_scope
)
8438 return declarator
->u
.id
.qualifying_scope
;
8440 /* Otherwise, the declarator is not a qualified name; the entity will
8441 be declared in the current scope. */
8445 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8446 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8450 create_array_type_for_decl (tree name
, tree type
, tree size
)
8452 tree itype
= NULL_TREE
;
8454 /* If things have already gone awry, bail now. */
8455 if (type
== error_mark_node
|| size
== error_mark_node
)
8456 return error_mark_node
;
8458 /* 8.3.4/1: If the type of the identifier of D contains the auto
8459 type-specifier, the program is ill-formed. */
8460 if (pedantic
&& type_uses_auto (type
))
8461 pedwarn (input_location
, OPT_Wpedantic
,
8462 "declaration of %qD as array of %<auto%>", name
);
8464 /* If there are some types which cannot be array elements,
8465 issue an error-message and return. */
8466 switch (TREE_CODE (type
))
8470 error ("declaration of %qD as array of void", name
);
8472 error ("creating array of void");
8473 return error_mark_node
;
8477 error ("declaration of %qD as array of functions", name
);
8479 error ("creating array of functions");
8480 return error_mark_node
;
8482 case REFERENCE_TYPE
:
8484 error ("declaration of %qD as array of references", name
);
8486 error ("creating array of references");
8487 return error_mark_node
;
8491 error ("declaration of %qD as array of function members", name
);
8493 error ("creating array of function members");
8494 return error_mark_node
;
8502 The constant expressions that specify the bounds of the arrays
8503 can be omitted only for the first member of the sequence. */
8504 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8507 error ("declaration of %qD as multidimensional array must "
8508 "have bounds for all dimensions except the first",
8511 error ("multidimensional array must have bounds for all "
8512 "dimensions except the first");
8514 return error_mark_node
;
8517 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
8518 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8520 /* Figure out the index type for the array. */
8522 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8525 T is called the array element type; this type shall not be [...] an
8526 abstract class type. */
8527 abstract_virtuals_error (name
, type
);
8529 return build_cplus_array_type (type
, itype
);
8532 /* Check that it's OK to declare a function with the indicated TYPE.
8533 SFK indicates the kind of special function (if any) that this
8534 function is. OPTYPE is the type given in a conversion operator
8535 declaration, or the class type for a constructor/destructor.
8536 Returns the actual return type of the function; that
8537 may be different than TYPE if an error occurs, or for certain
8538 special functions. */
8541 check_special_function_return_type (special_function_kind sfk
,
8547 case sfk_constructor
:
8549 error ("return type specification for constructor invalid");
8551 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8552 type
= build_pointer_type (optype
);
8554 type
= void_type_node
;
8557 case sfk_destructor
:
8559 error ("return type specification for destructor invalid");
8560 /* We can't use the proper return type here because we run into
8561 problems with ambiguous bases and covariant returns.
8562 Java classes are left unchanged because (void *) isn't a valid
8563 Java type, and we don't want to change the Java ABI. */
8564 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8565 type
= build_pointer_type (void_type_node
);
8567 type
= void_type_node
;
8570 case sfk_conversion
:
8572 error ("return type specified for %<operator %T%>", optype
);
8583 /* A variable or data member (whose unqualified name is IDENTIFIER)
8584 has been declared with the indicated TYPE. If the TYPE is not
8585 acceptable, issue an error message and return a type to use for
8586 error-recovery purposes. */
8589 check_var_type (tree identifier
, tree type
)
8591 if (VOID_TYPE_P (type
))
8594 error ("unnamed variable or field declared void");
8595 else if (identifier_p (identifier
))
8597 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8598 error ("variable or field %qE declared void", identifier
);
8601 error ("variable or field declared void");
8602 type
= error_mark_node
;
8608 /* Functions for adjusting the visibility of a tagged type and its nested
8609 types when it gets a name for linkage purposes from a typedef. */
8611 static void bt_reset_linkage (binding_entry
, void *);
8613 reset_type_linkage (tree type
)
8615 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8616 if (CLASS_TYPE_P (type
))
8617 binding_table_foreach (CLASSTYPE_NESTED_UTDS (type
), bt_reset_linkage
, NULL
);
8620 bt_reset_linkage (binding_entry b
, void */
*data*/
)
8622 reset_type_linkage (b
->type
);
8625 /* Given declspecs and a declarator (abstract or otherwise), determine
8626 the name and type of the object declared and construct a DECL node
8629 DECLSPECS points to the representation of declaration-specifier
8630 sequence that precedes declarator.
8632 DECL_CONTEXT says which syntactic context this declaration is in:
8633 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8634 FUNCDEF for a function definition. Like NORMAL but a few different
8635 error messages in each case. Return value may be zero meaning
8636 this definition is too screwy to try to parse.
8637 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8638 handle member functions (which have FIELD context).
8639 Return value may be zero meaning this definition is too screwy to
8641 PARM for a parameter declaration (either within a function prototype
8642 or before a function body). Make a PARM_DECL, or return void_type_node.
8643 TPARM for a template parameter declaration.
8644 CATCHPARM for a parameter declaration before a catch clause.
8645 TYPENAME if for a typename (in a cast or sizeof).
8646 Don't make a DECL node; just return the ..._TYPE node.
8647 FIELD for a struct or union field; make a FIELD_DECL.
8648 BITFIELD for a field with specified width.
8650 INITIALIZED is as for start_decl.
8652 ATTRLIST is a pointer to the list of attributes, which may be NULL
8653 if there are none; *ATTRLIST may be modified if attributes from inside
8654 the declarator should be applied to the declaration.
8656 When this function is called, scoping variables (such as
8657 CURRENT_CLASS_TYPE) should reflect the scope in which the
8658 declaration occurs, not the scope in which the new declaration will
8659 be placed. For example, on:
8663 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8666 Returns a DECL (if a declarator is present), a TYPE (if there is no
8667 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8671 grokdeclarator (const cp_declarator
*declarator
,
8672 cp_decl_specifier_seq
*declspecs
,
8673 enum decl_context decl_context
,
8677 tree type
= NULL_TREE
;
8679 int explicit_int128
= 0;
8680 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8681 int explicit_int
= 0;
8682 int explicit_char
= 0;
8683 int defaulted_int
= 0;
8685 tree typedef_decl
= NULL_TREE
;
8686 const char *name
= NULL
;
8687 tree typedef_type
= NULL_TREE
;
8688 /* True if this declarator is a function definition. */
8689 bool funcdef_flag
= false;
8690 cp_declarator_kind innermost_code
= cdk_error
;
8693 /* See the code below that used this. */
8694 tree decl_attr
= NULL_TREE
;
8697 /* Keep track of what sort of function is being processed
8698 so that we can warn about default return values, or explicit
8699 return values which do not match prescribed defaults. */
8700 special_function_kind sfk
= sfk_none
;
8702 tree dname
= NULL_TREE
;
8703 tree ctor_return_type
= NULL_TREE
;
8704 enum overload_flags flags
= NO_SPECIAL
;
8705 /* cv-qualifiers that apply to the declarator, for a declaration of
8706 a member function. */
8707 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8708 /* virt-specifiers that apply to the declarator, for a declaration of
8709 a member function. */
8710 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8711 /* ref-qualifier that applies to the declarator, for a declaration of
8712 a member function. */
8713 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8714 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8716 tree raises
= NULL_TREE
;
8717 int template_count
= 0;
8718 tree returned_attrs
= NULL_TREE
;
8719 tree parms
= NULL_TREE
;
8720 const cp_declarator
*id_declarator
;
8721 /* The unqualified name of the declarator; either an
8722 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8723 tree unqualified_id
;
8724 /* The class type, if any, in which this entity is located,
8725 or NULL_TREE if none. Note that this value may be different from
8726 the current class type; for example if an attempt is made to declare
8727 "A::f" inside "B", this value will be "A". */
8728 tree ctype
= current_class_type
;
8729 /* The NAMESPACE_DECL for the namespace in which this entity is
8730 located. If an unqualified name is used to declare the entity,
8731 this value will be NULL_TREE, even if the entity is located at
8733 tree in_namespace
= NULL_TREE
;
8734 cp_storage_class storage_class
;
8735 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8736 bool type_was_error_mark_node
= false;
8737 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8738 bool template_type_arg
= false;
8739 bool template_parm_flag
= false;
8740 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8741 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8742 source_location saved_loc
= input_location
;
8745 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8746 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8747 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8748 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8749 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8750 explicit_int128
= declspecs
->explicit_int128_p
;
8751 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8753 if (decl_context
== FUNCDEF
)
8754 funcdef_flag
= true, decl_context
= NORMAL
;
8755 else if (decl_context
== MEMFUNCDEF
)
8756 funcdef_flag
= true, decl_context
= FIELD
;
8757 else if (decl_context
== BITFIELD
)
8758 bitfield
= 1, decl_context
= FIELD
;
8759 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8760 template_type_arg
= true, decl_context
= TYPENAME
;
8761 else if (decl_context
== TPARM
)
8762 template_parm_flag
= true, decl_context
= PARM
;
8764 if (initialized
> 1)
8765 funcdef_flag
= true;
8767 /* Look inside a declarator for the name being declared
8768 and get it as a string, for an error message. */
8769 for (id_declarator
= declarator
;
8771 id_declarator
= id_declarator
->declarator
)
8773 if (id_declarator
->kind
!= cdk_id
)
8774 innermost_code
= id_declarator
->kind
;
8776 switch (id_declarator
->kind
)
8779 if (id_declarator
->declarator
8780 && id_declarator
->declarator
->kind
== cdk_id
)
8782 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8783 if (sfk
== sfk_destructor
)
8790 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8791 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8794 if (qualifying_scope
)
8796 if (at_function_scope_p ())
8800 A declarator-id shall not be qualified except
8803 None of the cases are permitted in block
8805 if (qualifying_scope
== global_namespace
)
8806 error ("invalid use of qualified-name %<::%D%>",
8808 else if (TYPE_P (qualifying_scope
))
8809 error ("invalid use of qualified-name %<%T::%D%>",
8810 qualifying_scope
, decl
);
8812 error ("invalid use of qualified-name %<%D::%D%>",
8813 qualifying_scope
, decl
);
8814 return error_mark_node
;
8816 else if (TYPE_P (qualifying_scope
))
8818 ctype
= qualifying_scope
;
8819 if (!MAYBE_CLASS_TYPE_P (ctype
))
8821 error ("%q#T is not a class or a namespace", ctype
);
8824 else if (innermost_code
!= cdk_function
8825 && current_class_type
8826 && !uniquely_derived_from_p (ctype
,
8827 current_class_type
))
8829 error ("invalid use of qualified-name %<%T::%D%>",
8830 qualifying_scope
, decl
);
8831 return error_mark_node
;
8834 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8835 in_namespace
= qualifying_scope
;
8837 switch (TREE_CODE (decl
))
8843 if (innermost_code
!= cdk_function
)
8845 error ("declaration of %qD as non-function", decl
);
8846 return error_mark_node
;
8848 else if (!qualifying_scope
8849 && !(current_class_type
&& at_class_scope_p ()))
8851 error ("declaration of %qD as non-member", decl
);
8852 return error_mark_node
;
8855 type
= TREE_OPERAND (decl
, 0);
8857 type
= constructor_name (type
);
8858 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8863 case TEMPLATE_ID_EXPR
:
8865 tree fns
= TREE_OPERAND (decl
, 0);
8868 if (!identifier_p (dname
))
8870 gcc_assert (is_overloaded_fn (dname
));
8871 dname
= DECL_NAME (get_first_fn (dname
));
8876 case IDENTIFIER_NODE
:
8877 if (identifier_p (decl
))
8880 if (C_IS_RESERVED_WORD (dname
))
8882 error ("declarator-id missing; using reserved word %qD",
8884 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8886 else if (!IDENTIFIER_TYPENAME_P (dname
))
8887 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8890 gcc_assert (flags
== NO_SPECIAL
);
8891 flags
= TYPENAME_FLAG
;
8892 ctor_return_type
= TREE_TYPE (dname
);
8893 sfk
= sfk_conversion
;
8894 if (is_typename_at_global_scope (dname
))
8895 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8897 name
= "<invalid operator>";
8914 return error_mark_node
;
8919 if (id_declarator
->kind
== cdk_id
)
8925 The declarator in a function-definition shall have the form
8926 D1 ( parameter-declaration-clause) ... */
8927 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8929 error ("function definition does not declare parameters");
8930 return error_mark_node
;
8933 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8934 && innermost_code
!= cdk_function
8935 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8937 error ("declaration of %qD as non-function", dname
);
8938 return error_mark_node
;
8942 && identifier_p (dname
)
8943 && UDLIT_OPER_P (dname
)
8944 && innermost_code
!= cdk_function
)
8946 error ("declaration of %qD as non-function", dname
);
8947 return error_mark_node
;
8950 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8954 error ("declaration of %qD as %<typedef%>", dname
);
8955 return error_mark_node
;
8957 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8959 error ("declaration of %qD as parameter", dname
);
8960 return error_mark_node
;
8964 /* Anything declared one level down from the top level
8965 must be one of the parameters of a function
8966 (because the body is at least two levels down). */
8968 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8969 by not allowing C++ class definitions to specify their parameters
8970 with xdecls (must be spec.d in the parmlist).
8972 Since we now wait to push a class scope until we are sure that
8973 we are in a legitimate method context, we must set oldcname
8974 explicitly (since current_class_name is not yet alive).
8976 We also want to avoid calling this a PARM if it is in a namespace. */
8978 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8980 cp_binding_level
*b
= current_binding_level
;
8981 current_binding_level
= b
->level_chain
;
8982 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8983 decl_context
= PARM
;
8984 current_binding_level
= b
;
8988 name
= decl_context
== PARM
? "parameter" : "type name";
8990 if (constexpr_p
&& typedef_p
)
8992 error ("%<constexpr%> cannot appear in a typedef declaration");
8993 return error_mark_node
;
8996 /* If there were multiple types specified in the decl-specifier-seq,
8997 issue an error message. */
8998 if (declspecs
->multiple_types_p
)
9000 error ("two or more data types in declaration of %qs", name
);
9001 return error_mark_node
;
9004 if (declspecs
->conflicting_specifiers_p
)
9006 error ("conflicting specifiers in declaration of %qs", name
);
9007 return error_mark_node
;
9010 /* Extract the basic type from the decl-specifier-seq. */
9011 type
= declspecs
->type
;
9012 if (type
== error_mark_node
)
9015 type_was_error_mark_node
= true;
9017 /* If the entire declaration is itself tagged as deprecated then
9018 suppress reports of deprecated items. */
9019 if (type
&& TREE_DEPRECATED (type
)
9020 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9021 warn_deprecated_use (type
, NULL_TREE
);
9022 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9024 typedef_decl
= type
;
9025 type
= TREE_TYPE (typedef_decl
);
9026 if (TREE_DEPRECATED (type
)
9027 && DECL_ARTIFICIAL (typedef_decl
)
9028 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9029 warn_deprecated_use (type
, NULL_TREE
);
9031 /* No type at all: default to `int', and set DEFAULTED_INT
9032 because it was not a user-defined typedef. */
9033 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9035 /* These imply 'int'. */
9036 type
= integer_type_node
;
9040 explicit_int
= declspecs
->explicit_int_p
;
9041 explicit_char
= declspecs
->explicit_char_p
;
9044 /* See the code below that used this. */
9046 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9048 typedef_type
= type
;
9051 if (sfk
!= sfk_conversion
)
9052 ctor_return_type
= ctype
;
9054 if (sfk
!= sfk_none
)
9055 type
= check_special_function_return_type (sfk
, type
,
9057 else if (type
== NULL_TREE
)
9063 /* We handle `main' specially here, because 'main () { }' is so
9064 common. With no options, it is allowed. With -Wreturn-type,
9065 it is a warning. It is only an error with -pedantic-errors. */
9066 is_main
= (funcdef_flag
9067 && dname
&& identifier_p (dname
)
9068 && MAIN_NAME_P (dname
)
9069 && ctype
== NULL_TREE
9070 && in_namespace
== NULL_TREE
9071 && current_namespace
== global_namespace
);
9073 if (type_was_error_mark_node
)
9074 /* We've already issued an error, don't complain more. */;
9075 else if (in_system_header
|| flag_ms_extensions
)
9076 /* Allow it, sigh. */;
9078 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9080 pedwarn (input_location
, OPT_Wpedantic
,
9081 "ISO C++ forbids declaration of %qs with no type", name
);
9083 warning (OPT_Wreturn_type
,
9084 "ISO C++ forbids declaration of %qs with no type", name
);
9086 type
= integer_type_node
;
9091 if (explicit_int128
)
9093 if (int128_integer_type_node
== NULL_TREE
)
9095 error ("%<__int128%> is not supported by this target");
9096 explicit_int128
= false;
9098 else if (pedantic
&& ! in_system_header
)
9099 pedwarn (input_location
, OPT_Wpedantic
,
9100 "ISO C++ does not support %<__int128%> for %qs", name
);
9103 /* Now process the modifiers that were specified
9104 and check for invalid combinations. */
9106 /* Long double is a special combination. */
9107 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9110 type
= cp_build_qualified_type (long_double_type_node
,
9111 cp_type_quals (type
));
9114 /* Check all other uses of type modifiers. */
9116 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9120 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9121 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9122 else if (signed_p
&& unsigned_p
)
9123 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9124 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9125 error ("%<long long%> invalid for %qs", name
);
9126 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9127 error ("%<long%> invalid for %qs", name
);
9128 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9129 error ("%<short%> invalid for %qs", name
);
9130 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9131 error ("%<long%> or %<short%> invalid for %qs", name
);
9132 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9133 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9134 else if ((long_p
|| short_p
) && explicit_char
)
9135 error ("%<long%> or %<short%> specified with char for %qs", name
);
9136 else if (long_p
&& short_p
)
9137 error ("%<long%> and %<short%> specified together for %qs", name
);
9138 else if (type
== char16_type_node
|| type
== char32_type_node
)
9140 if (signed_p
|| unsigned_p
)
9141 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9142 else if (short_p
|| long_p
)
9143 error ("%<short%> or %<long%> invalid for %qs", name
);
9148 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9150 pedwarn (input_location
, OPT_Wpedantic
,
9151 "long, short, signed or unsigned used invalidly for %qs",
9153 if (flag_pedantic_errors
)
9158 /* Discard the type modifiers if they are invalid. */
9169 /* Decide whether an integer type is signed or not.
9170 Optionally treat bitfields as signed by default. */
9174 It is implementation-defined whether a plain (neither
9175 explicitly signed or unsigned) char, short, int, or long
9176 bit-field is signed or unsigned.
9178 Naturally, we extend this to long long as well. Note that
9179 this does not include wchar_t. */
9180 || (bitfield
&& !flag_signed_bitfields
9182 /* A typedef for plain `int' without `signed' can be
9183 controlled just like plain `int', but a typedef for
9184 `signed int' cannot be so controlled. */
9186 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9187 && TREE_CODE (type
) == INTEGER_TYPE
9188 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9190 if (explicit_int128
)
9191 type
= int128_unsigned_type_node
;
9193 type
= long_long_unsigned_type_node
;
9195 type
= long_unsigned_type_node
;
9197 type
= short_unsigned_type_node
;
9198 else if (type
== char_type_node
)
9199 type
= unsigned_char_type_node
;
9200 else if (typedef_decl
)
9201 type
= unsigned_type_for (type
);
9203 type
= unsigned_type_node
;
9205 else if (signed_p
&& type
== char_type_node
)
9206 type
= signed_char_type_node
;
9207 else if (explicit_int128
)
9208 type
= int128_integer_type_node
;
9210 type
= long_long_integer_type_node
;
9212 type
= long_integer_type_node
;
9214 type
= short_integer_type_node
;
9216 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9218 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9219 error ("complex invalid for %qs", name
);
9220 /* If we just have "complex", it is equivalent to
9221 "complex double", but if any modifiers at all are specified it is
9222 the complex form of TYPE. E.g, "complex short" is
9223 "complex short int". */
9224 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9225 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9226 type
= complex_double_type_node
;
9227 else if (type
== integer_type_node
)
9228 type
= complex_integer_type_node
;
9229 else if (type
== float_type_node
)
9230 type
= complex_float_type_node
;
9231 else if (type
== double_type_node
)
9232 type
= complex_double_type_node
;
9233 else if (type
== long_double_type_node
)
9234 type
= complex_long_double_type_node
;
9236 type
= build_complex_type (type
);
9239 type_quals
= TYPE_UNQUALIFIED
;
9240 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9241 type_quals
|= TYPE_QUAL_CONST
;
9242 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9243 type_quals
|= TYPE_QUAL_VOLATILE
;
9244 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9245 type_quals
|= TYPE_QUAL_RESTRICT
;
9246 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9247 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9250 /* If we're using the injected-class-name to form a compound type or a
9251 declaration, replace it with the underlying class so we don't get
9252 redundant typedefs in the debug output. But if we are returning the
9253 type unchanged, leave it alone so that it's available to
9254 maybe_get_template_decl_from_type_decl. */
9255 if (CLASS_TYPE_P (type
)
9256 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9257 && type
== TREE_TYPE (TYPE_NAME (type
))
9258 && (declarator
|| type_quals
))
9259 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9261 type_quals
|= cp_type_quals (type
);
9262 type
= cp_build_qualified_type_real
9263 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9264 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9265 /* We might have ignored or rejected some of the qualifiers. */
9266 type_quals
= cp_type_quals (type
);
9269 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9270 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9271 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9273 storage_class
= declspecs
->storage_class
;
9274 if (storage_class
== sc_static
)
9275 staticp
= 1 + (decl_context
== FIELD
);
9277 if (virtualp
&& staticp
== 2)
9279 error ("member %qD cannot be declared both virtual and static", dname
);
9280 storage_class
= sc_none
;
9283 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9285 /* Issue errors about use of storage classes for parameters. */
9286 if (decl_context
== PARM
)
9290 error ("typedef declaration invalid in parameter declaration");
9291 return error_mark_node
;
9293 else if (template_parm_flag
&& storage_class
!= sc_none
)
9295 error ("storage class specified for template parameter %qs", name
);
9296 return error_mark_node
;
9298 else if (storage_class
== sc_static
9299 || storage_class
== sc_extern
9301 error ("storage class specifiers invalid in parameter declarations");
9303 /* Function parameters cannot be constexpr. If we saw one, moan
9304 and pretend it wasn't there. */
9307 error ("a parameter cannot be declared %<constexpr%>");
9312 /* Give error if `virtual' is used outside of class declaration. */
9314 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9316 error ("%<virtual%> outside class declaration");
9320 /* Static anonymous unions are dealt with here. */
9321 if (staticp
&& decl_context
== TYPENAME
9323 && ANON_AGGR_TYPE_P (declspecs
->type
))
9324 decl_context
= FIELD
;
9326 /* Warn about storage classes that are invalid for certain
9327 kinds of declarations (parameters, typenames, etc.). */
9330 && storage_class
!= sc_extern
9331 && storage_class
!= sc_static
)
9334 error ("multiple storage classes in declaration of %qs", name
);
9337 if (decl_context
!= NORMAL
9338 && ((storage_class
!= sc_none
9339 && storage_class
!= sc_mutable
)
9342 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9343 && (storage_class
== sc_register
9344 || storage_class
== sc_auto
))
9348 else if (decl_context
== FIELD
9349 /* C++ allows static class elements. */
9350 && storage_class
== sc_static
)
9351 /* C++ also allows inlines and signed and unsigned elements,
9352 but in those cases we don't come in here. */
9356 if (decl_context
== FIELD
)
9357 error ("storage class specified for %qs", name
);
9360 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9361 error ("storage class specified for parameter %qs", name
);
9363 error ("storage class specified for typename");
9365 if (storage_class
== sc_register
9366 || storage_class
== sc_auto
9367 || storage_class
== sc_extern
9369 storage_class
= sc_none
;
9372 else if (storage_class
== sc_extern
&& funcdef_flag
9373 && ! toplevel_bindings_p ())
9374 error ("nested function %qs declared %<extern%>", name
);
9375 else if (toplevel_bindings_p ())
9377 if (storage_class
== sc_auto
)
9378 error ("top-level declaration of %qs specifies %<auto%>", name
);
9381 && storage_class
!= sc_extern
9382 && storage_class
!= sc_static
)
9384 if (declspecs
->gnu_thread_keyword_p
)
9385 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9386 "declared %<__thread%>", name
);
9388 /* When thread_local is applied to a variable of block scope the
9389 storage-class-specifier static is implied if it does not appear
9391 storage_class
= declspecs
->storage_class
= sc_static
;
9395 if (storage_class
&& friendp
)
9397 error ("storage class specifiers invalid in friend function declarations");
9398 storage_class
= sc_none
;
9403 unqualified_id
= NULL_TREE
;
9406 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9407 switch (TREE_CODE (unqualified_id
))
9410 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9411 if (TYPE_P (unqualified_id
))
9412 unqualified_id
= constructor_name (unqualified_id
);
9415 case IDENTIFIER_NODE
:
9416 case TEMPLATE_ID_EXPR
:
9424 if (declspecs
->std_attributes
)
9426 /* Apply the c++11 attributes to the type preceding them. */
9427 input_location
= declspecs
->locations
[ds_std_attribute
];
9428 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9429 input_location
= saved_loc
;
9432 /* Determine the type of the entity declared by recurring on the
9434 for (; declarator
; declarator
= declarator
->declarator
)
9436 const cp_declarator
*inner_declarator
;
9439 if (type
== error_mark_node
)
9440 return error_mark_node
;
9442 attrs
= declarator
->attributes
;
9448 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9449 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9450 if (declarator
->kind
== cdk_function
)
9451 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9452 if (declarator
->kind
== cdk_array
)
9453 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9454 returned_attrs
= decl_attributes (&type
,
9455 chainon (returned_attrs
, attrs
),
9459 if (declarator
->kind
== cdk_id
)
9462 inner_declarator
= declarator
->declarator
;
9464 switch (declarator
->kind
)
9467 type
= create_array_type_for_decl (dname
, type
,
9468 declarator
->u
.array
.bounds
);
9469 if (declarator
->std_attributes
)
9472 The optional attribute-specifier-seq appertains to the
9474 returned_attrs
= chainon (returned_attrs
,
9475 declarator
->std_attributes
);
9483 /* Declaring a function type.
9484 Make sure we have a valid type for the function to return. */
9486 if (type_quals
!= TYPE_UNQUALIFIED
)
9488 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9489 warning (OPT_Wignored_qualifiers
,
9490 "type qualifiers ignored on function return type");
9491 /* We now know that the TYPE_QUALS don't apply to the
9492 decl, but to its return type. */
9493 type_quals
= TYPE_UNQUALIFIED
;
9495 errmsg
= targetm
.invalid_return_type (type
);
9499 type
= integer_type_node
;
9502 /* Error about some types functions can't return. */
9504 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9506 error ("%qs declared as function returning a function", name
);
9507 return error_mark_node
;
9509 if (TREE_CODE (type
) == ARRAY_TYPE
)
9511 error ("%qs declared as function returning an array", name
);
9512 return error_mark_node
;
9515 input_location
= declspecs
->locations
[ds_type_spec
];
9516 abstract_virtuals_error (ACU_RETURN
, type
);
9517 input_location
= saved_loc
;
9519 /* Pick up type qualifiers which should be applied to `this'. */
9520 memfn_quals
= declarator
->u
.function
.qualifiers
;
9521 /* Pick up virt-specifiers. */
9522 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9523 /* And ref-qualifier, too */
9524 rqual
= declarator
->u
.function
.ref_qualifier
;
9525 /* Pick up the exception specifications. */
9526 raises
= declarator
->u
.function
.exception_specification
;
9527 /* If the exception-specification is ill-formed, let's pretend
9528 there wasn't one. */
9529 if (raises
== error_mark_node
)
9532 /* Say it's a definition only for the CALL_EXPR
9533 closest to the identifier. */
9534 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9536 /* Handle a late-specified return type. */
9539 if (type_uses_auto (type
))
9541 if (!declarator
->u
.function
.late_return_type
)
9543 if (current_class_type
9544 && LAMBDA_TYPE_P (current_class_type
))
9545 /* OK for C++11 lambdas. */;
9546 else if (cxx_dialect
< cxx1y
)
9547 pedwarn (input_location
, 0, "%qs function uses "
9548 "%<auto%> type specifier without trailing "
9549 "return type", name
);
9551 permerror (input_location
, "virtual function cannot "
9552 "have deduced return type");
9554 else if (!is_auto (type
))
9556 error ("%qs function with trailing return type has"
9557 " %qT as its type rather than plain %<auto%>",
9559 return error_mark_node
;
9562 else if (declarator
->u
.function
.late_return_type
)
9564 if (cxx_dialect
< cxx11
)
9565 /* Not using maybe_warn_cpp0x because this should
9566 always be an error. */
9567 error ("trailing return type only available with "
9568 "-std=c++11 or -std=gnu++11");
9570 error ("%qs function with trailing return type not "
9571 "declared with %<auto%> type specifier", name
);
9572 return error_mark_node
;
9575 type
= splice_late_return_type
9576 (type
, declarator
->u
.function
.late_return_type
);
9577 if (type
== error_mark_node
)
9578 return error_mark_node
;
9580 if (ctype
== NULL_TREE
9581 && decl_context
== FIELD
9583 && (friendp
== 0 || dname
== current_class_name
))
9584 ctype
= current_class_type
;
9586 if (ctype
&& (sfk
== sfk_constructor
9587 || sfk
== sfk_destructor
))
9589 /* We are within a class's scope. If our declarator name
9590 is the same as the class name, and we are defining
9591 a function, then it is a constructor/destructor, and
9592 therefore returns a void type. */
9594 /* ISO C++ 12.4/2. A destructor may not be declared
9595 const or volatile. A destructor may not be static.
9596 A destructor may not be declared with ref-qualifier.
9598 ISO C++ 12.1. A constructor may not be declared
9599 const or volatile. A constructor may not be
9600 virtual. A constructor may not be static.
9601 A constructor may not be declared with ref-qualifier. */
9603 error ((flags
== DTOR_FLAG
)
9604 ? G_("destructor cannot be static member function")
9605 : G_("constructor cannot be static member function"));
9608 error ((flags
== DTOR_FLAG
)
9609 ? G_("destructors may not be cv-qualified")
9610 : G_("constructors may not be cv-qualified"));
9611 memfn_quals
= TYPE_UNQUALIFIED
;
9616 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9617 error ((flags
== DTOR_FLAG
)
9618 ? "destructors may not be ref-qualified"
9619 : "constructors may not be ref-qualified");
9620 rqual
= REF_QUAL_NONE
;
9623 if (decl_context
== FIELD
9624 && !member_function_or_else (ctype
,
9627 return error_mark_node
;
9629 if (flags
!= DTOR_FLAG
)
9631 /* It's a constructor. */
9636 permerror (input_location
, "constructors cannot be declared virtual");
9639 if (decl_context
== FIELD
9640 && sfk
!= sfk_constructor
)
9641 return error_mark_node
;
9643 if (decl_context
== FIELD
)
9649 error ("can%'t initialize friend function %qs", name
);
9652 /* Cannot be both friend and virtual. */
9653 error ("virtual functions cannot be friends");
9656 if (decl_context
== NORMAL
)
9657 error ("friend declaration not in class definition");
9658 if (current_function_decl
&& funcdef_flag
)
9659 error ("can%'t define friend function %qs in a local "
9663 else if (ctype
&& sfk
== sfk_conversion
)
9667 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9672 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9675 if (inner_declarator
9676 && inner_declarator
->kind
== cdk_id
9677 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9678 && arg_types
!= void_list_node
)
9680 error ("destructors may not have parameters");
9681 arg_types
= void_list_node
;
9685 type
= build_function_type (type
, arg_types
);
9686 if (declarator
->std_attributes
)
9689 The optional attribute-specifier-seq appertains to
9690 the function type. */
9691 decl_attributes (&type
, declarator
->std_attributes
,
9699 /* Filter out pointers-to-references and references-to-references.
9700 We can get these if a TYPE_DECL is used. */
9702 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9704 if (declarator
->kind
!= cdk_reference
)
9706 error ("cannot declare pointer to %q#T", type
);
9707 type
= TREE_TYPE (type
);
9710 /* In C++0x, we allow reference to reference declarations
9711 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9712 and template type arguments [14.3.1/4 temp.arg.type]. The
9713 check for direct reference to reference declarations, which
9714 are still forbidden, occurs below. Reasoning behind the change
9715 can be found in DR106, DR540, and the rvalue reference
9717 else if (cxx_dialect
== cxx98
)
9719 error ("cannot declare reference to %q#T", type
);
9720 type
= TREE_TYPE (type
);
9723 else if (VOID_TYPE_P (type
))
9725 if (declarator
->kind
== cdk_reference
)
9726 error ("cannot declare reference to %q#T", type
);
9727 else if (declarator
->kind
== cdk_ptrmem
)
9728 error ("cannot declare pointer to %q#T member", type
);
9731 /* We now know that the TYPE_QUALS don't apply to the decl,
9732 but to the target of the pointer. */
9733 type_quals
= TYPE_UNQUALIFIED
;
9735 /* This code used to handle METHOD_TYPE, but I don't think it's
9736 possible to get it here anymore. */
9737 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9738 if (declarator
->kind
== cdk_ptrmem
9739 && TREE_CODE (type
) == FUNCTION_TYPE
)
9741 memfn_quals
|= type_memfn_quals (type
);
9742 type
= build_memfn_type (type
,
9743 declarator
->u
.pointer
.class_type
,
9746 if (type
== error_mark_node
)
9747 return error_mark_node
;
9749 rqual
= REF_QUAL_NONE
;
9750 memfn_quals
= TYPE_UNQUALIFIED
;
9753 if (TREE_CODE (type
) == FUNCTION_TYPE
9754 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9755 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9756 error (declarator
->kind
== cdk_reference
9757 ? G_("cannot declare reference to qualified function type %qT")
9758 : G_("cannot declare pointer to qualified function type %qT"),
9761 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
9762 pedwarn (input_location
, OPT_Wvla
,
9763 declarator
->kind
== cdk_reference
9764 ? G_("reference to array of runtime bound")
9765 : G_("pointer to array of runtime bound"));
9767 /* When the pointed-to type involves components of variable size,
9768 care must be taken to ensure that the size evaluation code is
9769 emitted early enough to dominate all the possible later uses
9770 and late enough for the variables on which it depends to have
9773 This is expected to happen automatically when the pointed-to
9774 type has a name/declaration of it's own, but special attention
9775 is required if the type is anonymous.
9777 We handle the NORMAL and FIELD contexts here by inserting a
9778 dummy statement that just evaluates the size at a safe point
9779 and ensures it is not deferred until e.g. within a deeper
9780 conditional context (c++/43555).
9782 We expect nothing to be needed here for PARM or TYPENAME.
9783 Evaluating the size at this point for TYPENAME would
9784 actually be incorrect, as we might be in the middle of an
9785 expression with side effects on the pointed-to type size
9786 "arguments" prior to the pointer declaration point and the
9787 size evaluation could end up prior to the side effects. */
9789 if (!TYPE_NAME (type
)
9790 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9791 && at_function_scope_p ()
9792 && variably_modified_type_p (type
, NULL_TREE
))
9794 /* First break out any side-effects. */
9795 stabilize_vla_size (TYPE_SIZE (type
));
9796 /* And then force evaluation of the SAVE_EXPR. */
9797 finish_expr_stmt (TYPE_SIZE (type
));
9800 if (declarator
->kind
== cdk_reference
)
9802 /* In C++0x, the type we are creating a reference to might be
9803 a typedef which is itself a reference type. In that case,
9804 we follow the reference collapsing rules in
9805 [7.1.3/8 dcl.typedef] to create the final reference type:
9807 "If a typedef TD names a type that is a reference to a type
9808 T, an attempt to create the type 'lvalue reference to cv TD'
9809 creates the type 'lvalue reference to T,' while an attempt
9810 to create the type "rvalue reference to cv TD' creates the
9813 if (VOID_TYPE_P (type
))
9814 /* We already gave an error. */;
9815 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9817 if (declarator
->u
.reference
.rvalue_ref
)
9818 /* Leave type alone. */;
9820 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9823 type
= cp_build_reference_type
9824 (type
, declarator
->u
.reference
.rvalue_ref
);
9826 /* In C++0x, we need this check for direct reference to
9827 reference declarations, which are forbidden by
9828 [8.3.2/5 dcl.ref]. Reference to reference declarations
9829 are only allowed indirectly through typedefs and template
9830 type arguments. Example:
9832 void foo(int & &); // invalid ref-to-ref decl
9834 typedef int & int_ref;
9835 void foo(int_ref &); // valid ref-to-ref decl
9837 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9838 error ("cannot declare reference to %q#T, which is not "
9839 "a typedef or a template type argument", type
);
9841 else if (TREE_CODE (type
) == METHOD_TYPE
)
9842 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9843 else if (declarator
->kind
== cdk_ptrmem
)
9845 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9847 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9848 /* We will already have complained. */
9849 type
= error_mark_node
;
9851 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9855 type
= build_pointer_type (type
);
9857 /* Process a list of type modifier keywords (such as
9858 const or volatile) that were given inside the `*' or `&'. */
9860 if (declarator
->u
.pointer
.qualifiers
)
9863 = cp_build_qualified_type (type
,
9864 declarator
->u
.pointer
.qualifiers
);
9865 type_quals
= cp_type_quals (type
);
9868 /* Apply C++11 attributes to the pointer, and not to the
9869 type pointed to. This is unlike what is done for GNU
9870 attributes above. It is to comply with [dcl.ptr]/1:
9872 [the optional attribute-specifier-seq (7.6.1) appertains
9873 to the pointer and not to the object pointed to]. */
9874 if (declarator
->std_attributes
)
9875 decl_attributes (&type
, declarator
->std_attributes
,
9889 /* We need to stabilize side-effects in VLA sizes for regular array
9890 declarations too, not just pointers to arrays. */
9891 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9892 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9893 && at_function_scope_p ()
9894 && variably_modified_type_p (type
, NULL_TREE
))
9895 stabilize_vla_size (TYPE_SIZE (type
));
9897 /* A `constexpr' specifier used in an object declaration declares
9898 the object as `const'. */
9899 if (constexpr_p
&& innermost_code
!= cdk_function
)
9901 if (type_quals
& TYPE_QUAL_VOLATILE
)
9902 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9903 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9905 type_quals
|= TYPE_QUAL_CONST
;
9906 type
= cp_build_qualified_type (type
, type_quals
);
9910 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9911 && TREE_CODE (type
) != FUNCTION_TYPE
9912 && TREE_CODE (type
) != METHOD_TYPE
)
9914 error ("template-id %qD used as a declarator",
9916 unqualified_id
= dname
;
9919 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9920 qualified with a class-name, turn it into a METHOD_TYPE, unless
9921 we know that the function is static. We take advantage of this
9922 opportunity to do other processing that pertains to entities
9923 explicitly declared to be class members. Note that if DECLARATOR
9924 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9925 would not have exited the loop above. */
9927 && declarator
->u
.id
.qualifying_scope
9928 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9930 ctype
= declarator
->u
.id
.qualifying_scope
;
9931 ctype
= TYPE_MAIN_VARIANT (ctype
);
9932 template_count
= num_template_headers_for_class (ctype
);
9934 if (ctype
== current_class_type
)
9938 permerror (input_location
, "member functions are implicitly friends of their class");
9942 permerror (declarator
->id_loc
,
9943 "extra qualification %<%T::%> on member %qs",
9946 else if (/* If the qualifying type is already complete, then we
9947 can skip the following checks. */
9948 !COMPLETE_TYPE_P (ctype
)
9949 && (/* If the function is being defined, then
9950 qualifying type must certainly be complete. */
9952 /* A friend declaration of "T::f" is OK, even if
9953 "T" is a template parameter. But, if this
9954 function is not a friend, the qualifying type
9956 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9957 /* For a declaration, the type need not be
9958 complete, if either it is dependent (since there
9959 is no meaningful definition of complete in that
9960 case) or the qualifying class is currently being
9962 || !(dependent_type_p (ctype
)
9963 || currently_open_class (ctype
)))
9964 /* Check that the qualifying type is complete. */
9965 && !complete_type_or_else (ctype
, NULL_TREE
))
9966 return error_mark_node
;
9967 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9969 if (current_class_type
9970 && (!friendp
|| funcdef_flag
))
9973 ? G_("cannot define member function %<%T::%s%> "
9975 : G_("cannot declare member function %<%T::%s%> "
9977 ctype
, name
, current_class_type
);
9978 return error_mark_node
;
9981 else if (typedef_p
&& current_class_type
)
9983 error ("cannot declare member %<%T::%s%> within %qT",
9984 ctype
, name
, current_class_type
);
9985 return error_mark_node
;
9989 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9990 ctype
= current_class_type
;
9992 /* Now TYPE has the actual type. */
9997 *attrlist
= chainon (returned_attrs
, *attrlist
);
9999 attrlist
= &returned_attrs
;
10003 && declarator
->kind
== cdk_id
10004 && declarator
->std_attributes
)
10005 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10006 a declarator-id appertains to the entity that is declared. */
10007 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10009 /* Handle parameter packs. */
10010 if (parameter_pack_p
)
10012 if (decl_context
== PARM
)
10013 /* Turn the type into a pack expansion.*/
10014 type
= make_pack_expansion (type
);
10016 error ("non-parameter %qs cannot be a parameter pack", name
);
10019 /* Did array size calculations overflow or does the array cover more
10020 than half of the address-space? */
10021 if (TREE_CODE (type
) == ARRAY_TYPE
10022 && COMPLETE_TYPE_P (type
)
10023 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10024 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10026 error ("size of array %qs is too large", name
);
10027 /* If we proceed with the array type as it is, we'll eventually
10028 crash in tree_low_cst(). */
10029 type
= error_mark_node
;
10032 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10033 && !processing_template_decl
10034 && variably_modified_type_p (type
, NULL_TREE
))
10036 if (decl_context
== FIELD
)
10037 error ("data member may not have variably modified type %qT", type
);
10039 error ("parameter may not have variably modified type %qT", type
);
10040 type
= error_mark_node
;
10043 if (explicitp
== 1 || (explicitp
&& friendp
))
10045 /* [dcl.fct.spec] The explicit specifier shall only be used in
10046 declarations of constructors within a class definition. */
10047 error ("only declarations of constructors can be %<explicit%>");
10051 if (storage_class
== sc_mutable
)
10053 if (decl_context
!= FIELD
|| friendp
)
10055 error ("non-member %qs cannot be declared %<mutable%>", name
);
10056 storage_class
= sc_none
;
10058 else if (decl_context
== TYPENAME
|| typedef_p
)
10060 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10061 storage_class
= sc_none
;
10063 else if (TREE_CODE (type
) == FUNCTION_TYPE
10064 || TREE_CODE (type
) == METHOD_TYPE
)
10066 error ("function %qs cannot be declared %<mutable%>", name
);
10067 storage_class
= sc_none
;
10071 error ("static %qs cannot be declared %<mutable%>", name
);
10072 storage_class
= sc_none
;
10074 else if (type_quals
& TYPE_QUAL_CONST
)
10076 error ("const %qs cannot be declared %<mutable%>", name
);
10077 storage_class
= sc_none
;
10079 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10081 permerror (input_location
, "reference %qs cannot be declared "
10082 "%<mutable%>", name
);
10083 storage_class
= sc_none
;
10087 /* If this is declaring a typedef name, return a TYPE_DECL. */
10088 if (typedef_p
&& decl_context
!= TYPENAME
)
10092 /* Note that the grammar rejects storage classes
10093 in typenames, fields or parameters. */
10094 if (current_lang_name
== lang_name_java
)
10095 TYPE_FOR_JAVA (type
) = 1;
10097 /* This declaration:
10099 typedef void f(int) const;
10101 declares a function type which is not a member of any
10102 particular class, but which is cv-qualified; for
10103 example "f S::*" declares a pointer to a const-qualified
10104 member function of S. We record the cv-qualification in the
10106 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10108 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10110 /* We have now dealt with these qualifiers. */
10111 memfn_quals
= TYPE_UNQUALIFIED
;
10112 rqual
= REF_QUAL_NONE
;
10115 if (type_uses_auto (type
))
10117 error ("typedef declared %<auto%>");
10118 type
= error_mark_node
;
10121 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
10122 pedwarn (input_location
, OPT_Wvla
,
10123 "typedef naming array of runtime bound");
10125 if (decl_context
== FIELD
)
10126 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10128 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10129 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10130 error_at (DECL_SOURCE_LOCATION (decl
),
10131 "typedef name may not be a nested-name-specifier");
10132 TREE_TYPE (decl
) = error_mark_node
;
10135 if (decl_context
!= FIELD
)
10137 if (!current_function_decl
)
10138 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10139 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10140 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10141 (current_function_decl
)))
10142 /* The TYPE_DECL is "abstract" because there will be
10143 clones of this constructor/destructor, and there will
10144 be copies of this TYPE_DECL generated in those
10146 DECL_ABSTRACT (decl
) = 1;
10148 else if (current_class_type
10149 && constructor_name_p (unqualified_id
, current_class_type
))
10150 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10151 "as enclosing class",
10154 /* If the user declares "typedef struct {...} foo" then the
10155 struct will have an anonymous name. Fill that name in now.
10156 Nothing can refer to it, so nothing needs know about the name
10158 if (type
!= error_mark_node
10160 && TYPE_NAME (type
)
10161 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10162 && TYPE_ANONYMOUS_P (type
)
10163 && declspecs
->type_definition_p
10164 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10168 /* Replace the anonymous name with the real name everywhere. */
10169 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10171 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10172 /* We do not rename the debug info representing the
10173 anonymous tagged type because the standard says in
10174 [dcl.typedef] that the naming applies only for
10175 linkage purposes. */
10176 /*debug_hooks->set_name (t, decl);*/
10177 TYPE_NAME (t
) = decl
;
10180 if (TYPE_LANG_SPECIFIC (type
))
10181 TYPE_WAS_ANONYMOUS (type
) = 1;
10183 /* If this is a typedef within a template class, the nested
10184 type is a (non-primary) template. The name for the
10185 template needs updating as well. */
10186 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10187 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10188 = TYPE_IDENTIFIER (type
);
10190 /* Adjust linkage now that we aren't anonymous anymore. */
10191 reset_type_linkage (type
);
10193 /* FIXME remangle member functions; member functions of a
10194 type with external linkage have external linkage. */
10198 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10199 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10201 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10202 memfn_quals
!= TYPE_UNQUALIFIED
,
10203 inlinep
, friendp
, raises
!= NULL_TREE
);
10205 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10206 /* Acknowledge that this was written:
10207 `using analias = atype;'. */
10208 TYPE_DECL_ALIAS_P (decl
) = 1;
10213 /* Detect the case of an array type of unspecified size
10214 which came, as such, direct from a typedef name.
10215 We must copy the type, so that the array's domain can be
10216 individually set by the object's initializer. */
10218 if (type
&& typedef_type
10219 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10220 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10221 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10223 /* Detect where we're using a typedef of function type to declare a
10224 function. PARMS will not be set, so we must create it now. */
10226 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10228 tree decls
= NULL_TREE
;
10231 for (args
= TYPE_ARG_TYPES (type
);
10232 args
&& args
!= void_list_node
;
10233 args
= TREE_CHAIN (args
))
10235 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10237 DECL_CHAIN (decl
) = decls
;
10241 parms
= nreverse (decls
);
10243 if (decl_context
!= TYPENAME
)
10245 /* A cv-qualifier-seq shall only be part of the function type
10246 for a non-static member function. A ref-qualifier shall only
10247 .... /same as above/ [dcl.fct] */
10248 if ((type_memfn_quals (type
) != TYPE_UNQUALIFIED
10249 || type_memfn_rqual (type
) != REF_QUAL_NONE
)
10250 && (current_class_type
== NULL_TREE
|| staticp
) )
10253 ? G_("qualified function types cannot be used to "
10254 "declare static member functions")
10255 : G_("qualified function types cannot be used to "
10256 "declare free functions"));
10257 type
= TYPE_MAIN_VARIANT (type
);
10260 /* The qualifiers on the function type become the qualifiers on
10261 the non-static member function. */
10262 memfn_quals
|= type_memfn_quals (type
);
10263 rqual
= type_memfn_rqual (type
);
10264 type_quals
= TYPE_UNQUALIFIED
;
10268 /* If this is a type name (such as, in a cast or sizeof),
10269 compute the type and return it now. */
10271 if (decl_context
== TYPENAME
)
10273 /* Note that the grammar rejects storage classes
10274 in typenames, fields or parameters. */
10275 if (type_quals
!= TYPE_UNQUALIFIED
)
10276 type_quals
= TYPE_UNQUALIFIED
;
10278 /* Special case: "friend class foo" looks like a TYPENAME context. */
10281 if (type_quals
!= TYPE_UNQUALIFIED
)
10283 error ("type qualifiers specified for friend class declaration");
10284 type_quals
= TYPE_UNQUALIFIED
;
10288 error ("%<inline%> specified for friend class declaration");
10294 /* Don't allow friend declaration without a class-key. */
10295 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10296 permerror (input_location
, "template parameters cannot be friends");
10297 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10298 permerror (input_location
, "friend declaration requires class-key, "
10299 "i.e. %<friend class %T::%D%>",
10300 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10302 permerror (input_location
, "friend declaration requires class-key, "
10303 "i.e. %<friend %#T%>",
10307 /* Only try to do this stuff if we didn't already give up. */
10308 if (type
!= integer_type_node
)
10310 /* A friendly class? */
10311 if (current_class_type
)
10312 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10313 /*complain=*/true);
10315 error ("trying to make class %qT a friend of global scope",
10318 type
= void_type_node
;
10321 else if (memfn_quals
|| rqual
)
10323 if (ctype
== NULL_TREE
10324 && TREE_CODE (type
) == METHOD_TYPE
)
10325 ctype
= TYPE_METHOD_BASETYPE (type
);
10328 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10329 /* Core issue #547: need to allow this in template type args.
10330 Allow it in general in C++11 for alias-declarations. */
10331 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10332 && TREE_CODE (type
) == FUNCTION_TYPE
)
10333 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10335 error ("invalid qualifiers on non-member function type");
10340 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10341 && decl_context
!= CATCHPARM
10342 && TREE_CODE (type
) != UNION_TYPE
10345 error ("abstract declarator %qT used as declaration", type
);
10346 return error_mark_node
;
10349 /* Only functions may be declared using an operator-function-id. */
10351 && IDENTIFIER_OPNAME_P (unqualified_id
)
10352 && TREE_CODE (type
) != FUNCTION_TYPE
10353 && TREE_CODE (type
) != METHOD_TYPE
)
10355 error ("declaration of %qD as non-function", unqualified_id
);
10356 return error_mark_node
;
10359 /* We don't check parameter types here because we can emit a better
10360 error message later. */
10361 if (decl_context
!= PARM
)
10363 type
= check_var_type (unqualified_id
, type
);
10364 if (type
== error_mark_node
)
10365 return error_mark_node
;
10368 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10369 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10371 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10373 if (ctype
|| in_namespace
)
10374 error ("cannot use %<::%> in parameter declaration");
10376 if (type_uses_auto (type
))
10378 if (template_parm_flag
)
10380 error ("template parameter declared %<auto%>");
10381 type
= error_mark_node
;
10383 else if (decl_context
== CATCHPARM
)
10385 error ("catch parameter declared %<auto%>");
10386 type
= error_mark_node
;
10388 else if (current_class_type
&& LAMBDA_TYPE_P (current_class_type
))
10390 if (cxx_dialect
< cxx1y
)
10391 pedwarn (location_of (type
), 0,
10392 "use of %<auto%> in lambda parameter declaration "
10393 "only available with "
10394 "-std=c++1y or -std=gnu++1y");
10396 else if (cxx_dialect
< cxx1y
)
10397 pedwarn (location_of (type
), 0,
10398 "use of %<auto%> in parameter declaration "
10399 "only available with "
10400 "-std=c++1y or -std=gnu++1y");
10402 pedwarn (location_of (type
), OPT_Wpedantic
,
10403 "ISO C++ forbids use of %<auto%> in parameter "
10407 /* A parameter declared as an array of T is really a pointer to T.
10408 One declared as a function is really a pointer to a function.
10409 One declared as a member is really a pointer to member. */
10411 if (TREE_CODE (type
) == ARRAY_TYPE
)
10413 /* Transfer const-ness of array into that of type pointed to. */
10414 type
= build_pointer_type (TREE_TYPE (type
));
10415 type_quals
= TYPE_UNQUALIFIED
;
10417 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10418 type
= build_pointer_type (type
);
10421 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10422 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10424 cp_cv_quals real_quals
= memfn_quals
;
10425 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10426 real_quals
|= TYPE_QUAL_CONST
;
10427 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10433 if (decl_context
== PARM
)
10435 decl
= cp_build_parm_decl (unqualified_id
, type
);
10437 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10438 memfn_quals
!= TYPE_UNQUALIFIED
,
10439 inlinep
, friendp
, raises
!= NULL_TREE
);
10441 else if (decl_context
== FIELD
)
10443 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10444 && type_uses_auto (type
))
10446 error ("non-static data member declared %<auto%>");
10447 type
= error_mark_node
;
10450 /* The C99 flexible array extension. */
10451 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10452 && TYPE_DOMAIN (type
) == NULL_TREE
)
10454 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10455 tf_warning_or_error
);
10456 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10459 if (type
== error_mark_node
)
10461 /* Happens when declaring arrays of sizes which
10462 are error_mark_node, for example. */
10465 else if (in_namespace
&& !friendp
)
10467 /* Something like struct S { int N::j; }; */
10468 error ("invalid use of %<::%>");
10469 return error_mark_node
;
10471 else if (TREE_CODE (type
) == FUNCTION_TYPE
10472 || TREE_CODE (type
) == METHOD_TYPE
)
10475 tree function_context
;
10479 /* This should never happen in pure C++ (the check
10480 could be an assert). It could happen in
10481 Objective-C++ if someone writes invalid code that
10482 uses a function declaration for an instance
10483 variable or property (instance variables and
10484 properties are parsed as FIELD_DECLs, but they are
10485 part of an Objective-C class, not a C++ class).
10486 That code is invalid and is caught by this
10490 error ("declaration of function %qD in invalid context",
10492 return error_mark_node
;
10495 /* ``A union may [ ... ] not [ have ] virtual functions.''
10497 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10499 error ("function %qD declared virtual inside a union",
10501 return error_mark_node
;
10504 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10508 error ("%qD cannot be declared virtual, since it "
10509 "is always static",
10516 /* Check that the name used for a destructor makes sense. */
10517 if (sfk
== sfk_destructor
)
10519 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10523 gcc_assert (friendp
);
10524 error ("expected qualified name in friend declaration "
10525 "for destructor %qD", uqname
);
10526 return error_mark_node
;
10529 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10531 error ("declaration of %qD as member of %qT",
10533 return error_mark_node
;
10537 error ("a destructor cannot be %<constexpr%>");
10538 return error_mark_node
;
10541 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10543 error ("expected qualified name in friend declaration "
10544 "for constructor %qD",
10545 id_declarator
->u
.id
.unqualified_name
);
10546 return error_mark_node
;
10549 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10550 function_context
= (ctype
!= NULL_TREE
) ?
10551 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10552 publicp
= (! friendp
|| ! staticp
)
10553 && function_context
== NULL_TREE
;
10554 decl
= grokfndecl (ctype
, type
,
10555 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10556 ? unqualified_id
: dname
,
10559 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10560 friendp
? -1 : 0, friendp
, publicp
,
10561 inlinep
| (2 * constexpr_p
),
10563 funcdef_flag
, template_count
, in_namespace
,
10564 attrlist
, declarator
->id_loc
);
10565 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10566 if (decl
== NULL_TREE
)
10567 return error_mark_node
;
10569 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10570 /* The decl and setting of decl_attr is also turned off. */
10571 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10574 /* [class.conv.ctor]
10576 A constructor declared without the function-specifier
10577 explicit that can be called with a single parameter
10578 specifies a conversion from the type of its first
10579 parameter to the type of its class. Such a constructor
10580 is called a converting constructor. */
10581 if (explicitp
== 2)
10582 DECL_NONCONVERTING_P (decl
) = 1;
10584 else if (!staticp
&& !dependent_type_p (type
)
10585 && !COMPLETE_TYPE_P (complete_type (type
))
10586 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10588 if (unqualified_id
)
10589 error ("field %qD has incomplete type %qT",
10590 unqualified_id
, type
);
10592 error ("name %qT has incomplete type", type
);
10594 type
= error_mark_node
;
10601 error ("%qE is neither function nor member function; "
10602 "cannot be declared friend", unqualified_id
);
10610 /* Friends are treated specially. */
10611 if (ctype
== current_class_type
)
10612 ; /* We already issued a permerror. */
10613 else if (decl
&& DECL_NAME (decl
))
10615 if (template_class_depth (current_class_type
) == 0)
10617 decl
= check_explicit_specialization
10618 (unqualified_id
, decl
, template_count
,
10619 2 * funcdef_flag
+ 4);
10620 if (decl
== error_mark_node
)
10621 return error_mark_node
;
10624 decl
= do_friend (ctype
, unqualified_id
, decl
,
10630 return error_mark_node
;
10633 /* Structure field. It may not be a function, except for C++. */
10635 if (decl
== NULL_TREE
)
10639 /* C++ allows static class members. All other work
10640 for this is done by grokfield. */
10641 decl
= build_lang_decl_loc (declarator
->id_loc
,
10642 VAR_DECL
, unqualified_id
, type
);
10643 set_linkage_for_static_data_member (decl
);
10644 /* Even if there is an in-class initialization, DECL
10645 is considered undefined until an out-of-class
10646 definition is provided. */
10647 DECL_EXTERNAL (decl
) = 1;
10651 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10652 if (declspecs
->gnu_thread_keyword_p
)
10653 DECL_GNU_TLS_P (decl
) = true;
10656 if (constexpr_p
&& !initialized
)
10658 error ("constexpr static data member %qD must have an "
10659 "initializer", decl
);
10660 constexpr_p
= false;
10667 error ("non-static data member %qE declared %<constexpr%>",
10669 constexpr_p
= false;
10671 decl
= build_decl (input_location
,
10672 FIELD_DECL
, unqualified_id
, type
);
10673 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10674 if (bitfield
&& !unqualified_id
)
10675 TREE_NO_WARNING (decl
) = 1;
10677 if (storage_class
== sc_mutable
)
10679 DECL_MUTABLE_P (decl
) = 1;
10680 storage_class
= sc_none
;
10685 /* An attempt is being made to initialize a non-static
10686 member. This is new in C++11. */
10687 maybe_warn_cpp0x (CPP0X_NSDMI
);
10689 /* If this has been parsed with static storage class, but
10690 errors forced staticp to be cleared, ensure NSDMI is
10692 if (declspecs
->storage_class
== sc_static
)
10693 DECL_INITIAL (decl
) = error_mark_node
;
10697 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10698 memfn_quals
!= TYPE_UNQUALIFIED
,
10699 inlinep
, friendp
, raises
!= NULL_TREE
);
10702 else if (TREE_CODE (type
) == FUNCTION_TYPE
10703 || TREE_CODE (type
) == METHOD_TYPE
)
10705 tree original_name
;
10708 if (!unqualified_id
)
10709 return error_mark_node
;
10711 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10712 original_name
= dname
;
10714 original_name
= unqualified_id
;
10716 if (storage_class
== sc_auto
)
10717 error ("storage class %<auto%> invalid for function %qs", name
);
10718 else if (storage_class
== sc_register
)
10719 error ("storage class %<register%> invalid for function %qs", name
);
10722 if (declspecs
->gnu_thread_keyword_p
)
10723 error ("storage class %<__thread%> invalid for function %qs",
10726 error ("storage class %<thread_local%> invalid for function %qs",
10730 if (virt_specifiers
)
10731 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10732 /* Function declaration not at top level.
10733 Storage classes other than `extern' are not allowed
10734 and `extern' makes no difference. */
10735 if (! toplevel_bindings_p ()
10736 && (storage_class
== sc_static
10737 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10740 if (storage_class
== sc_static
)
10741 pedwarn (input_location
, OPT_Wpedantic
,
10742 "%<static%> specified invalid for function %qs "
10743 "declared out of global scope", name
);
10745 pedwarn (input_location
, OPT_Wpedantic
,
10746 "%<inline%> specifier invalid for function %qs "
10747 "declared out of global scope", name
);
10750 if (ctype
== NULL_TREE
)
10754 error ("virtual non-class function %qs", name
);
10757 else if (sfk
== sfk_constructor
10758 || sfk
== sfk_destructor
)
10760 error (funcdef_flag
10761 ? G_("%qs defined in a non-class scope")
10762 : G_("%qs declared in a non-class scope"), name
);
10767 /* Record whether the function is public. */
10768 publicp
= (ctype
!= NULL_TREE
10769 || storage_class
!= sc_static
);
10771 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10772 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10774 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10776 template_count
, in_namespace
, attrlist
,
10777 declarator
->id_loc
);
10778 if (decl
== NULL_TREE
)
10779 return error_mark_node
;
10783 int invalid_static
= 0;
10785 /* Don't allow a static member function in a class, and forbid
10786 declaring main to be static. */
10787 if (TREE_CODE (type
) == METHOD_TYPE
)
10789 permerror (input_location
, "cannot declare member function %qD to have "
10790 "static linkage", decl
);
10791 invalid_static
= 1;
10793 else if (current_function_decl
)
10795 /* FIXME need arm citation */
10796 error ("cannot declare static function inside another function");
10797 invalid_static
= 1;
10800 if (invalid_static
)
10803 storage_class
= sc_none
;
10809 /* It's a variable. */
10811 /* An uninitialized decl with `extern' is a reference. */
10812 decl
= grokvardecl (type
, unqualified_id
,
10815 (type_quals
& TYPE_QUAL_CONST
) != 0,
10816 ctype
? ctype
: in_namespace
);
10817 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10818 memfn_quals
!= TYPE_UNQUALIFIED
,
10819 inlinep
, friendp
, raises
!= NULL_TREE
);
10823 DECL_CONTEXT (decl
) = ctype
;
10826 permerror (input_location
, "%<static%> may not be used when defining "
10827 "(as opposed to declaring) a static data member");
10829 storage_class
= sc_none
;
10831 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10833 error ("static member %qD declared %<register%>", decl
);
10834 storage_class
= sc_none
;
10836 if (storage_class
== sc_extern
&& pedantic
)
10838 pedwarn (input_location
, OPT_Wpedantic
,
10839 "cannot explicitly declare member %q#D to have "
10840 "extern linkage", decl
);
10841 storage_class
= sc_none
;
10844 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10846 error ("declaration of constexpr variable %qD is not a definition",
10848 constexpr_p
= false;
10852 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10854 if (toplevel_bindings_p ())
10856 /* It's common practice (and completely valid) to have a const
10857 be initialized and declared extern. */
10858 if (!(type_quals
& TYPE_QUAL_CONST
))
10859 warning (0, "%qs initialized and declared %<extern%>", name
);
10863 error ("%qs has both %<extern%> and initializer", name
);
10864 return error_mark_node
;
10868 /* Record `register' declaration for warnings on &
10869 and in case doing stupid register allocation. */
10871 if (storage_class
== sc_register
)
10872 DECL_REGISTER (decl
) = 1;
10873 else if (storage_class
== sc_extern
)
10874 DECL_THIS_EXTERN (decl
) = 1;
10875 else if (storage_class
== sc_static
)
10876 DECL_THIS_STATIC (decl
) = 1;
10878 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10879 if (constexpr_p
&& VAR_P (decl
))
10880 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10882 /* Record constancy and volatility on the DECL itself . There's
10883 no need to do this when processing a template; we'll do this
10884 for the instantiated declaration based on the type of DECL. */
10885 if (!processing_template_decl
)
10886 cp_apply_type_quals_to_decl (type_quals
, decl
);
10892 /* Subroutine of start_function. Ensure that each of the parameter
10893 types (as listed in PARMS) is complete, as is required for a
10894 function definition. */
10897 require_complete_types_for_parms (tree parms
)
10899 for (; parms
; parms
= DECL_CHAIN (parms
))
10901 if (dependent_type_p (TREE_TYPE (parms
)))
10903 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10904 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10906 relayout_decl (parms
);
10907 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10910 /* grokparms or complete_type_or_else will have already issued
10912 TREE_TYPE (parms
) = error_mark_node
;
10916 /* Returns nonzero if T is a local variable. */
10919 local_variable_p (const_tree t
)
10922 /* A VAR_DECL with a context that is a _TYPE is a static data
10924 && !TYPE_P (CP_DECL_CONTEXT (t
))
10925 /* Any other non-local variable must be at namespace scope. */
10926 && !DECL_NAMESPACE_SCOPE_P (t
))
10927 || (TREE_CODE (t
) == PARM_DECL
))
10933 /* Like local_variable_p, but suitable for use as a tree-walking
10937 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10940 if (local_variable_p (*tp
)
10941 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
10943 else if (TYPE_P (*tp
))
10944 *walk_subtrees
= 0;
10949 /* Check that ARG, which is a default-argument expression for a
10950 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10951 something goes wrong. DECL may also be a _TYPE node, rather than a
10952 DECL, if there is no DECL available. */
10955 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
10960 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10961 /* We get a DEFAULT_ARG when looking at an in-class declaration
10962 with a default argument. Ignore the argument for now; we'll
10963 deal with it after the class is complete. */
10972 decl_type
= TREE_TYPE (decl
);
10974 if (arg
== error_mark_node
10975 || decl
== error_mark_node
10976 || TREE_TYPE (arg
) == error_mark_node
10977 || decl_type
== error_mark_node
)
10978 /* Something already went wrong. There's no need to check
10980 return error_mark_node
;
10982 /* [dcl.fct.default]
10984 A default argument expression is implicitly converted to the
10986 ++cp_unevaluated_operand
;
10987 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
10989 --cp_unevaluated_operand
;
10991 if (warn_zero_as_null_pointer_constant
10992 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10993 && null_ptr_cst_p (arg
)
10994 && (complain
& tf_warning
)
10995 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
10996 return nullptr_node
;
10998 /* [dcl.fct.default]
11000 Local variables shall not be used in default argument
11003 The keyword `this' shall not be used in a default argument of a
11004 member function. */
11005 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11008 if (complain
& tf_warning_or_error
)
11010 if (DECL_NAME (var
) == this_identifier
)
11011 permerror (input_location
, "default argument %qE uses %qD",
11014 error ("default argument %qE uses local variable %qD", arg
, var
);
11016 return error_mark_node
;
11023 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11026 type_is_deprecated (tree type
)
11028 enum tree_code code
;
11029 if (TREE_DEPRECATED (type
))
11031 if (TYPE_NAME (type
)
11032 && TREE_DEPRECATED (TYPE_NAME (type
)))
11035 /* Do warn about using typedefs to a deprecated class. */
11036 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11037 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11039 code
= TREE_CODE (type
);
11041 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11042 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11043 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11044 return type_is_deprecated (TREE_TYPE (type
));
11046 if (TYPE_PTRMEMFUNC_P (type
))
11047 return type_is_deprecated
11048 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11053 /* Decode the list of parameter types for a function type.
11054 Given the list of things declared inside the parens,
11055 return a list of types.
11057 If this parameter does not end with an ellipsis, we append
11060 *PARMS is set to the chain of PARM_DECLs created. */
11063 grokparms (tree parmlist
, tree
*parms
)
11065 tree result
= NULL_TREE
;
11066 tree decls
= NULL_TREE
;
11070 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11072 tree type
= NULL_TREE
;
11073 tree init
= TREE_PURPOSE (parm
);
11074 tree decl
= TREE_VALUE (parm
);
11075 const char *errmsg
;
11077 if (parm
== void_list_node
)
11080 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11083 type
= TREE_TYPE (decl
);
11084 if (VOID_TYPE_P (type
))
11086 if (same_type_p (type
, void_type_node
)
11087 && DECL_SELF_REFERENCE_P (type
)
11088 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11089 /* this is a parmlist of `(void)', which is ok. */
11091 cxx_incomplete_type_error (decl
, type
);
11092 /* It's not a good idea to actually create parameters of
11093 type `void'; other parts of the compiler assume that a
11094 void type terminates the parameter list. */
11095 type
= error_mark_node
;
11096 TREE_TYPE (decl
) = error_mark_node
;
11099 if (type
!= error_mark_node
11100 && TYPE_FOR_JAVA (type
)
11101 && MAYBE_CLASS_TYPE_P (type
))
11103 error ("parameter %qD has Java class type", decl
);
11104 type
= error_mark_node
;
11105 TREE_TYPE (decl
) = error_mark_node
;
11109 if (type
!= error_mark_node
11110 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11113 type
= error_mark_node
;
11114 TREE_TYPE (decl
) = error_mark_node
;
11117 if (type
!= error_mark_node
)
11119 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11121 tree deptype
= type_is_deprecated (type
);
11123 warn_deprecated_use (deptype
, NULL_TREE
);
11126 /* Top-level qualifiers on the parameters are
11127 ignored for function types. */
11128 type
= cp_build_qualified_type (type
, 0);
11129 if (TREE_CODE (type
) == METHOD_TYPE
)
11131 error ("parameter %qD invalidly declared method type", decl
);
11132 type
= build_pointer_type (type
);
11133 TREE_TYPE (decl
) = type
;
11135 else if (abstract_virtuals_error (decl
, type
))
11136 any_error
= 1; /* Seems like a good idea. */
11137 else if (POINTER_TYPE_P (type
))
11139 /* [dcl.fct]/6, parameter types cannot contain pointers
11140 (references) to arrays of unknown bound. */
11141 tree t
= TREE_TYPE (type
);
11142 int ptr
= TYPE_PTR_P (type
);
11146 if (TYPE_PTR_P (t
))
11148 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11150 else if (!TYPE_DOMAIN (t
))
11154 if (TREE_CODE (t
) == ARRAY_TYPE
)
11156 ? G_("parameter %qD includes pointer to array of "
11157 "unknown bound %qT")
11158 : G_("parameter %qD includes reference to array of "
11159 "unknown bound %qT"),
11165 else if (init
&& !processing_template_decl
)
11166 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11169 DECL_CHAIN (decl
) = decls
;
11171 result
= tree_cons (init
, type
, result
);
11173 decls
= nreverse (decls
);
11174 result
= nreverse (result
);
11176 result
= chainon (result
, void_list_node
);
11183 /* D is a constructor or overloaded `operator='.
11185 Let T be the class in which D is declared. Then, this function
11188 -1 if D's is an ill-formed constructor or copy assignment operator
11189 whose first parameter is of type `T'.
11190 0 if D is not a copy constructor or copy assignment
11192 1 if D is a copy constructor or copy assignment operator whose
11193 first parameter is a reference to non-const qualified T.
11194 2 if D is a copy constructor or copy assignment operator whose
11195 first parameter is a reference to const qualified T.
11197 This function can be used as a predicate. Positive values indicate
11198 a copy constructor and nonzero values indicate a copy assignment
11202 copy_fn_p (const_tree d
)
11208 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11210 if (TREE_CODE (d
) == TEMPLATE_DECL
11211 || (DECL_TEMPLATE_INFO (d
)
11212 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11213 /* Instantiations of template member functions are never copy
11214 functions. Note that member functions of templated classes are
11215 represented as template functions internally, and we must
11216 accept those as copy functions. */
11219 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11223 arg_type
= TREE_VALUE (args
);
11224 if (arg_type
== error_mark_node
)
11227 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11229 /* Pass by value copy assignment operator. */
11232 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11233 && !TYPE_REF_IS_RVALUE (arg_type
)
11234 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11236 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11242 args
= TREE_CHAIN (args
);
11244 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11245 /* There are more non-optional args. */
11251 /* D is a constructor or overloaded `operator='.
11253 Let T be the class in which D is declared. Then, this function
11254 returns true when D is a move constructor or move assignment
11255 operator, false otherwise. */
11258 move_fn_p (const_tree d
)
11260 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11262 if (cxx_dialect
== cxx98
)
11263 /* There are no move constructors if we are in C++98 mode. */
11266 if (TREE_CODE (d
) == TEMPLATE_DECL
11267 || (DECL_TEMPLATE_INFO (d
)
11268 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11269 /* Instantiations of template member functions are never move
11270 functions. Note that member functions of templated classes are
11271 represented as template functions internally, and we must
11272 accept those as move functions. */
11275 return move_signature_fn_p (d
);
11278 /* D is a constructor or overloaded `operator='.
11280 Then, this function returns true when D has the same signature as a move
11281 constructor or move assignment operator (because either it is such a
11282 ctor/op= or it is a template specialization with the same signature),
11283 false otherwise. */
11286 move_signature_fn_p (const_tree d
)
11290 bool result
= false;
11292 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11296 arg_type
= TREE_VALUE (args
);
11297 if (arg_type
== error_mark_node
)
11300 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11301 && TYPE_REF_IS_RVALUE (arg_type
)
11302 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11306 args
= TREE_CHAIN (args
);
11308 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11309 /* There are more non-optional args. */
11315 /* Remember any special properties of member function DECL. */
11318 grok_special_member_properties (tree decl
)
11322 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11325 class_type
= DECL_CONTEXT (decl
);
11326 if (DECL_CONSTRUCTOR_P (decl
))
11328 int ctor
= copy_fn_p (decl
);
11330 if (!DECL_ARTIFICIAL (decl
))
11331 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11337 A non-template constructor for class X is a copy
11338 constructor if its first parameter is of type X&, const
11339 X&, volatile X& or const volatile X&, and either there
11340 are no other parameters or else all other parameters have
11341 default arguments. */
11342 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11343 if (user_provided_p (decl
))
11344 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11346 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11348 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11350 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11351 if (user_provided_p (decl
))
11352 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11354 else if (move_fn_p (decl
) && user_provided_p (decl
))
11355 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11356 else if (is_list_ctor (decl
))
11357 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11359 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11360 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11361 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11363 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11367 A non-template assignment operator for class X is a copy
11368 assignment operator if its parameter is of type X, X&, const
11369 X&, volatile X& or const volatile X&. */
11371 int assop
= copy_fn_p (decl
);
11375 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11376 if (user_provided_p (decl
))
11377 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11379 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11381 else if (move_fn_p (decl
) && user_provided_p (decl
))
11382 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11384 /* Destructors are handled in check_methods. */
11387 /* Check a constructor DECL has the correct form. Complains
11388 if the class has a constructor of the form X(X). */
11391 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11393 int ctor_parm
= copy_fn_p (decl
);
11399 A declaration of a constructor for a class X is ill-formed if
11400 its first parameter is of type (optionally cv-qualified) X
11401 and either there are no other parameters or else all other
11402 parameters have default arguments.
11404 We *don't* complain about member template instantiations that
11405 have this form, though; they can occur as we try to decide
11406 what constructor to use during overload resolution. Since
11407 overload resolution will never prefer such a constructor to
11408 the non-template copy constructor (which is either explicitly
11409 or implicitly defined), there's no need to worry about their
11410 existence. Theoretically, they should never even be
11411 instantiated, but that's hard to forestall. */
11412 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11420 /* An operator with this code is unary, but can also be binary. */
11423 ambi_op_p (enum tree_code code
)
11425 return (code
== INDIRECT_REF
11426 || code
== ADDR_EXPR
11427 || code
== UNARY_PLUS_EXPR
11428 || code
== NEGATE_EXPR
11429 || code
== PREINCREMENT_EXPR
11430 || code
== PREDECREMENT_EXPR
);
11433 /* An operator with this name can only be unary. */
11436 unary_op_p (enum tree_code code
)
11438 return (code
== TRUTH_NOT_EXPR
11439 || code
== BIT_NOT_EXPR
11440 || code
== COMPONENT_REF
11441 || code
== TYPE_EXPR
);
11444 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11445 errors are issued for invalid declarations. */
11448 grok_op_properties (tree decl
, bool complain
)
11450 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11452 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11453 tree name
= DECL_NAME (decl
);
11454 enum tree_code operator_code
;
11459 /* Count the number of arguments and check for ellipsis. */
11460 for (argtype
= argtypes
, arity
= 0;
11461 argtype
&& argtype
!= void_list_node
;
11462 argtype
= TREE_CHAIN (argtype
))
11464 ellipsis_p
= !argtype
;
11466 class_type
= DECL_CONTEXT (decl
);
11467 if (class_type
&& !CLASS_TYPE_P (class_type
))
11468 class_type
= NULL_TREE
;
11470 if (DECL_CONV_FN_P (decl
))
11471 operator_code
= TYPE_EXPR
;
11475 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11476 if (ansi_opname (CODE) == name) \
11478 operator_code = (CODE); \
11481 else if (ansi_assopname (CODE) == name) \
11483 operator_code = (CODE); \
11484 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11488 #include "operators.def"
11489 #undef DEF_OPERATOR
11491 gcc_unreachable ();
11494 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11495 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11498 switch (operator_code
)
11501 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11505 TYPE_GETS_DELETE (class_type
) |= 1;
11509 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11512 case VEC_DELETE_EXPR
:
11513 TYPE_GETS_DELETE (class_type
) |= 2;
11520 /* [basic.std.dynamic.allocation]/1:
11522 A program is ill-formed if an allocation function is declared
11523 in a namespace scope other than global scope or declared static
11526 The same also holds true for deallocation functions. */
11527 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11528 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11530 if (DECL_NAMESPACE_SCOPE_P (decl
))
11532 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11534 error ("%qD may not be declared within a namespace", decl
);
11537 else if (!TREE_PUBLIC (decl
))
11539 error ("%qD may not be declared as static", decl
);
11545 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11547 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11548 DECL_IS_OPERATOR_NEW (decl
) = 1;
11550 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11551 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11554 /* An operator function must either be a non-static member function
11555 or have at least one parameter of a class, a reference to a class,
11556 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11557 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11559 if (operator_code
== TYPE_EXPR
11560 || operator_code
== CALL_EXPR
11561 || operator_code
== COMPONENT_REF
11562 || operator_code
== ARRAY_REF
11563 || operator_code
== NOP_EXPR
)
11565 error ("%qD must be a nonstatic member function", decl
);
11572 if (DECL_STATIC_FUNCTION_P (decl
))
11574 error ("%qD must be either a non-static member "
11575 "function or a non-member function", decl
);
11579 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11581 tree arg
= non_reference (TREE_VALUE (p
));
11582 if (arg
== error_mark_node
)
11585 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11586 because these checks are performed even on
11587 template functions. */
11588 if (MAYBE_CLASS_TYPE_P (arg
)
11589 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11593 if (!p
|| p
== void_list_node
)
11596 error ("%qD must have an argument of class or "
11597 "enumerated type", decl
);
11603 /* There are no restrictions on the arguments to an overloaded
11605 if (operator_code
== CALL_EXPR
)
11608 /* Warn about conversion operators that will never be used. */
11609 if (IDENTIFIER_TYPENAME_P (name
)
11610 && ! DECL_TEMPLATE_INFO (decl
)
11612 /* Warn only declaring the function; there is no need to
11613 warn again about out-of-class definitions. */
11614 && class_type
== current_class_type
)
11616 tree t
= TREE_TYPE (name
);
11617 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11620 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11622 if (VOID_TYPE_P (t
))
11623 warning (OPT_Wconversion
,
11625 ? G_("conversion to a reference to void "
11626 "will never use a type conversion operator")
11627 : G_("conversion to void "
11628 "will never use a type conversion operator"));
11629 else if (class_type
)
11631 if (t
== class_type
)
11632 warning (OPT_Wconversion
,
11634 ? G_("conversion to a reference to the same type "
11635 "will never use a type conversion operator")
11636 : G_("conversion to the same type "
11637 "will never use a type conversion operator"));
11638 /* Don't force t to be complete here. */
11639 else if (MAYBE_CLASS_TYPE_P (t
)
11640 && COMPLETE_TYPE_P (t
)
11641 && DERIVED_FROM_P (t
, class_type
))
11642 warning (OPT_Wconversion
,
11644 ? G_("conversion to a reference to a base class "
11645 "will never use a type conversion operator")
11646 : G_("conversion to a base class "
11647 "will never use a type conversion operator"));
11652 if (operator_code
== COND_EXPR
)
11655 error ("ISO C++ prohibits overloading operator ?:");
11658 else if (ellipsis_p
)
11660 error ("%qD must not have variable number of arguments", decl
);
11663 else if (ambi_op_p (operator_code
))
11666 /* We pick the one-argument operator codes by default, so
11667 we don't have to change anything. */
11669 else if (arity
== 2)
11671 /* If we thought this was a unary operator, we now know
11672 it to be a binary operator. */
11673 switch (operator_code
)
11676 operator_code
= MULT_EXPR
;
11680 operator_code
= BIT_AND_EXPR
;
11683 case UNARY_PLUS_EXPR
:
11684 operator_code
= PLUS_EXPR
;
11688 operator_code
= MINUS_EXPR
;
11691 case PREINCREMENT_EXPR
:
11692 operator_code
= POSTINCREMENT_EXPR
;
11695 case PREDECREMENT_EXPR
:
11696 operator_code
= POSTDECREMENT_EXPR
;
11700 gcc_unreachable ();
11703 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11705 if ((operator_code
== POSTINCREMENT_EXPR
11706 || operator_code
== POSTDECREMENT_EXPR
)
11707 && ! processing_template_decl
11708 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11711 error ("postfix %qD must take %<int%> as its argument",
11714 error ("postfix %qD must take %<int%> as its second "
11722 error ("%qD must take either zero or one argument", decl
);
11724 error ("%qD must take either one or two arguments", decl
);
11728 /* More Effective C++ rule 6. */
11730 && (operator_code
== POSTINCREMENT_EXPR
11731 || operator_code
== POSTDECREMENT_EXPR
11732 || operator_code
== PREINCREMENT_EXPR
11733 || operator_code
== PREDECREMENT_EXPR
))
11735 tree arg
= TREE_VALUE (argtypes
);
11736 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11737 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11738 arg
= TREE_TYPE (arg
);
11739 arg
= TYPE_MAIN_VARIANT (arg
);
11740 if (operator_code
== PREINCREMENT_EXPR
11741 || operator_code
== PREDECREMENT_EXPR
)
11743 if (TREE_CODE (ret
) != REFERENCE_TYPE
11744 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11746 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11747 build_reference_type (arg
));
11751 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11752 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11756 else if (unary_op_p (operator_code
))
11761 error ("%qD must take %<void%>", decl
);
11763 error ("%qD must take exactly one argument", decl
);
11767 else /* if (binary_op_p (operator_code)) */
11772 error ("%qD must take exactly one argument", decl
);
11774 error ("%qD must take exactly two arguments", decl
);
11778 /* More Effective C++ rule 7. */
11780 && (operator_code
== TRUTH_ANDIF_EXPR
11781 || operator_code
== TRUTH_ORIF_EXPR
11782 || operator_code
== COMPOUND_EXPR
))
11783 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11787 /* Effective C++ rule 23. */
11790 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11791 && (operator_code
== PLUS_EXPR
11792 || operator_code
== MINUS_EXPR
11793 || operator_code
== TRUNC_DIV_EXPR
11794 || operator_code
== MULT_EXPR
11795 || operator_code
== TRUNC_MOD_EXPR
)
11796 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11797 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11799 /* [over.oper]/8 */
11800 for (; argtypes
&& argtypes
!= void_list_node
;
11801 argtypes
= TREE_CHAIN (argtypes
))
11802 if (TREE_PURPOSE (argtypes
))
11804 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11805 if (operator_code
== POSTINCREMENT_EXPR
11806 || operator_code
== POSTDECREMENT_EXPR
)
11808 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11813 error ("%qD cannot have default arguments", decl
);
11821 /* Return a string giving the keyword associate with CODE. */
11823 static const char *
11824 tag_name (enum tag_types code
)
11836 case typename_type
:
11839 gcc_unreachable ();
11843 /* Name lookup in an elaborated-type-specifier (after the keyword
11844 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11845 elaborated-type-specifier is invalid, issue a diagnostic and return
11846 error_mark_node; otherwise, return the *_TYPE to which it referred.
11847 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11850 check_elaborated_type_specifier (enum tag_types tag_code
,
11852 bool allow_template_p
)
11858 struct S { struct S *p; };
11860 name lookup will find the TYPE_DECL for the implicit "S::S"
11861 typedef. Adjust for that here. */
11862 if (DECL_SELF_REFERENCE_P (decl
))
11863 decl
= TYPE_NAME (TREE_TYPE (decl
));
11865 type
= TREE_TYPE (decl
);
11867 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11868 is false for this case as well. */
11869 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11871 error ("using template type parameter %qT after %qs",
11872 type
, tag_name (tag_code
));
11873 return error_mark_node
;
11875 /* Accept template template parameters. */
11876 else if (allow_template_p
11877 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11878 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11882 If the identifier resolves to a typedef-name or the
11883 simple-template-id resolves to an alias template
11884 specialization, the elaborated-type-specifier is ill-formed.
11886 In other words, the only legitimate declaration to use in the
11887 elaborated type specifier is the implicit typedef created when
11888 the type is declared. */
11889 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11890 && !DECL_SELF_REFERENCE_P (decl
)
11891 && tag_code
!= typename_type
)
11893 if (alias_template_specialization_p (type
))
11894 error ("using alias template specialization %qT after %qs",
11895 type
, tag_name (tag_code
));
11897 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11898 inform (DECL_SOURCE_LOCATION (decl
),
11899 "%qD has a previous declaration here", decl
);
11900 return error_mark_node
;
11902 else if (TREE_CODE (type
) != RECORD_TYPE
11903 && TREE_CODE (type
) != UNION_TYPE
11904 && tag_code
!= enum_type
11905 && tag_code
!= typename_type
)
11907 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11908 inform (input_location
, "%q+T has a previous declaration here", type
);
11909 return error_mark_node
;
11911 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11912 && tag_code
== enum_type
)
11914 error ("%qT referred to as enum", type
);
11915 inform (input_location
, "%q+T has a previous declaration here", type
);
11916 return error_mark_node
;
11918 else if (!allow_template_p
11919 && TREE_CODE (type
) == RECORD_TYPE
11920 && CLASSTYPE_IS_TEMPLATE (type
))
11922 /* If a class template appears as elaborated type specifier
11923 without a template header such as:
11925 template <class T> class C {};
11926 void f(class C); // No template header here
11928 then the required template argument is missing. */
11929 error ("template argument required for %<%s %T%>",
11930 tag_name (tag_code
),
11931 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11932 return error_mark_node
;
11938 /* Lookup NAME in elaborate type specifier in scope according to
11939 SCOPE and issue diagnostics if necessary.
11940 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11941 found, and ERROR_MARK_NODE for type error. */
11944 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11945 tag_scope scope
, bool template_header_p
)
11949 if (scope
== ts_global
)
11951 /* First try ordinary name lookup, ignoring hidden class name
11952 injected via friend declaration. */
11953 decl
= lookup_name_prefer_type (name
, 2);
11954 /* If that fails, the name will be placed in the smallest
11955 non-class, non-function-prototype scope according to 3.3.1/5.
11956 We may already have a hidden name declared as friend in this
11957 scope. So lookup again but not ignoring hidden names.
11958 If we find one, that name will be made visible rather than
11959 creating a new tag. */
11961 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11964 decl
= lookup_type_scope (name
, scope
);
11967 && (DECL_CLASS_TEMPLATE_P (decl
)
11968 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11969 decl
= DECL_TEMPLATE_RESULT (decl
);
11971 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11973 /* Look for invalid nested type:
11977 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11979 error ("%qD has the same name as the class in which it is "
11982 return error_mark_node
;
11985 /* Two cases we need to consider when deciding if a class
11986 template is allowed as an elaborated type specifier:
11987 1. It is a self reference to its own class.
11988 2. It comes with a template header.
11992 template <class T> class C {
11993 class C *c1; // DECL_SELF_REFERENCE_P is true
11996 template <class U> class C; // template_header_p is true
11997 template <class T> class C<T>::D {
11998 class C *c2; // DECL_SELF_REFERENCE_P is true
12001 t
= check_elaborated_type_specifier (tag_code
,
12004 | DECL_SELF_REFERENCE_P (decl
));
12007 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12009 error ("reference to %qD is ambiguous", name
);
12010 print_candidates (decl
);
12011 return error_mark_node
;
12017 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12018 Define the tag as a forward-reference if it is not defined.
12020 If a declaration is given, process it here, and report an error if
12021 multiple declarations are not identical.
12023 SCOPE is TS_CURRENT when this is also a definition. Only look in
12024 the current frame for the name (since C++ allows new names in any
12025 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12026 declaration. Only look beginning from the current scope outward up
12027 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12029 TEMPLATE_HEADER_P is true when this declaration is preceded by
12030 a set of template parameters. */
12033 xref_tag_1 (enum tag_types tag_code
, tree name
,
12034 tag_scope orig_scope
, bool template_header_p
)
12036 enum tree_code code
;
12038 tree context
= NULL_TREE
;
12041 gcc_assert (identifier_p (name
));
12047 code
= RECORD_TYPE
;
12053 code
= ENUMERAL_TYPE
;
12056 gcc_unreachable ();
12059 if (orig_scope
== ts_lambda
)
12060 scope
= ts_current
;
12062 scope
= orig_scope
;
12064 /* In case of anonymous name, xref_tag is only called to
12065 make type node and push name. Name lookup is not required. */
12066 if (ANON_AGGRNAME_P (name
))
12069 t
= lookup_and_check_tag (tag_code
, name
,
12070 scope
, template_header_p
);
12072 if (t
== error_mark_node
)
12073 return error_mark_node
;
12075 if (scope
!= ts_current
&& t
&& current_class_type
12076 && template_class_depth (current_class_type
)
12077 && template_header_p
)
12079 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12082 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12083 definition of this tag. Since, in addition, we are currently
12084 processing a (member) template declaration of a template
12085 class, we must be very careful; consider:
12092 { template <class V>
12093 friend struct S1; };
12095 Here, the S2::S1 declaration should not be confused with the
12096 outer declaration. In particular, the inner version should
12097 have a template parameter of level 2, not level 1. This
12098 would be particularly important if the member declaration
12101 template <class V = U> friend struct S1;
12103 say, when we should tsubst into `U' when instantiating
12104 S2. On the other hand, when presented with:
12114 we must find the inner binding eventually. We
12115 accomplish this by making sure that the new type we
12116 create to represent this declaration has the right
12118 context
= TYPE_CONTEXT (t
);
12124 /* If no such tag is yet defined, create a forward-reference node
12125 and record it as the "definition".
12126 When a real declaration of this type is found,
12127 the forward-reference will be altered into a real type. */
12128 if (code
== ENUMERAL_TYPE
)
12130 error ("use of enum %q#D without previous declaration", name
);
12131 return error_mark_node
;
12135 t
= make_class_type (code
);
12136 TYPE_CONTEXT (t
) = context
;
12137 if (orig_scope
== ts_lambda
)
12138 /* Remember that we're declaring a lambda to avoid bogus errors
12139 in push_template_decl. */
12140 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12141 t
= pushtag (name
, t
, scope
);
12146 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12148 if (!redeclare_class_template (t
, current_template_parms
))
12149 return error_mark_node
;
12151 else if (!processing_template_decl
12152 && CLASS_TYPE_P (t
)
12153 && CLASSTYPE_IS_TEMPLATE (t
))
12155 error ("redeclaration of %qT as a non-template", t
);
12156 error ("previous declaration %q+D", t
);
12157 return error_mark_node
;
12160 /* Make injected friend class visible. */
12161 if (scope
!= ts_within_enclosing_non_class
12162 && hidden_name_p (TYPE_NAME (t
)))
12164 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12165 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12167 if (TYPE_TEMPLATE_INFO (t
))
12169 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12170 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12178 /* Wrapper for xref_tag_1. */
12181 xref_tag (enum tag_types tag_code
, tree name
,
12182 tag_scope scope
, bool template_header_p
)
12186 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12187 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12188 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12194 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12196 enum tag_types tag_kind
;
12198 if (TREE_CODE (old
) == RECORD_TYPE
)
12199 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12201 tag_kind
= union_type
;
12203 if (id
== NULL_TREE
)
12204 id
= TYPE_IDENTIFIER (old
);
12206 return xref_tag (tag_kind
, id
, scope
, false);
12209 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12210 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12211 access_* node, and the TREE_VALUE is the type of the base-class.
12212 Non-NULL TREE_TYPE indicates virtual inheritance.
12214 Returns true if the binfo hierarchy was successfully created,
12215 false if an error was detected. */
12218 xref_basetypes (tree ref
, tree base_list
)
12221 tree binfo
, base_binfo
;
12222 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12223 unsigned max_bases
= 0; /* Maximum direct bases. */
12225 tree default_access
;
12226 tree igo_prev
; /* Track Inheritance Graph Order. */
12228 if (ref
== error_mark_node
)
12231 /* The base of a derived class is private by default, all others are
12233 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12234 && CLASSTYPE_DECLARED_CLASS (ref
)
12235 ? access_private_node
: access_public_node
);
12237 /* First, make sure that any templates in base-classes are
12238 instantiated. This ensures that if we call ourselves recursively
12239 we do not get confused about which classes are marked and which
12241 basep
= &base_list
;
12244 tree basetype
= TREE_VALUE (*basep
);
12246 /* The dependent_type_p call below should really be dependent_scope_p
12247 so that we give a hard error about using an incomplete type as a
12248 base, but we allow it with a pedwarn for backward
12250 if (processing_template_decl
12251 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12252 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12253 if (!dependent_type_p (basetype
)
12254 && !complete_type_or_else (basetype
, NULL
))
12255 /* An incomplete type. Remove it from the list. */
12256 *basep
= TREE_CHAIN (*basep
);
12260 if (TREE_TYPE (*basep
))
12262 if (CLASS_TYPE_P (basetype
))
12263 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12264 basep
= &TREE_CHAIN (*basep
);
12268 TYPE_MARKED_P (ref
) = 1;
12270 /* The binfo slot should be empty, unless this is an (ill-formed)
12272 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12274 error ("redefinition of %q#T", ref
);
12278 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12280 binfo
= make_tree_binfo (max_bases
);
12282 TYPE_BINFO (ref
) = binfo
;
12283 BINFO_OFFSET (binfo
) = size_zero_node
;
12284 BINFO_TYPE (binfo
) = ref
;
12286 /* Apply base-class info set up to the variants of this type. */
12287 fixup_type_variants (ref
);
12291 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12292 /* An aggregate cannot have baseclasses. */
12293 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12295 if (TREE_CODE (ref
) == UNION_TYPE
)
12297 error ("derived union %qT invalid", ref
);
12304 if (TYPE_FOR_JAVA (ref
))
12306 error ("Java class %qT cannot have multiple bases", ref
);
12313 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12315 if (TYPE_FOR_JAVA (ref
))
12317 error ("Java class %qT cannot have virtual bases", ref
);
12322 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12324 tree access
= TREE_PURPOSE (base_list
);
12325 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12326 tree basetype
= TREE_VALUE (base_list
);
12328 if (access
== access_default_node
)
12329 access
= default_access
;
12331 if (PACK_EXPANSION_P (basetype
))
12332 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12333 if (TREE_CODE (basetype
) == TYPE_DECL
)
12334 basetype
= TREE_TYPE (basetype
);
12335 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12337 error ("base type %qT fails to be a struct or class type",
12342 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12343 TYPE_FOR_JAVA (ref
) = 1;
12345 base_binfo
= NULL_TREE
;
12346 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12348 base_binfo
= TYPE_BINFO (basetype
);
12349 /* The original basetype could have been a typedef'd type. */
12350 basetype
= BINFO_TYPE (base_binfo
);
12352 /* Inherit flags from the base. */
12353 TYPE_HAS_NEW_OPERATOR (ref
)
12354 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12355 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12356 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12357 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12358 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12359 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12360 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12361 CLASSTYPE_REPEATED_BASE_P (ref
)
12362 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12365 /* We must do this test after we've seen through a typedef
12367 if (TYPE_MARKED_P (basetype
))
12369 if (basetype
== ref
)
12370 error ("recursive type %qT undefined", basetype
);
12372 error ("duplicate base type %qT invalid", basetype
);
12376 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12377 /* Regenerate the pack expansion for the bases. */
12378 basetype
= make_pack_expansion (basetype
);
12380 TYPE_MARKED_P (basetype
) = 1;
12382 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12383 &igo_prev
, via_virtual
);
12384 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12385 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12387 BINFO_BASE_APPEND (binfo
, base_binfo
);
12388 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12391 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12392 /* If we didn't get max_vbases vbases, we must have shared at
12393 least one of them, and are therefore diamond shaped. */
12394 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12396 /* Unmark all the types. */
12397 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12398 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12399 TYPE_MARKED_P (ref
) = 0;
12401 /* Now see if we have a repeated base type. */
12402 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12404 for (base_binfo
= binfo
; base_binfo
;
12405 base_binfo
= TREE_CHAIN (base_binfo
))
12407 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12409 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12412 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12414 for (base_binfo
= binfo
; base_binfo
;
12415 base_binfo
= TREE_CHAIN (base_binfo
))
12416 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12417 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12426 /* Copies the enum-related properties from type SRC to type DST.
12427 Used with the underlying type of an enum and the enum itself. */
12429 copy_type_enum (tree dst
, tree src
)
12432 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12434 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12435 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12436 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12437 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12438 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12439 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12440 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12441 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12442 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12446 /* Begin compiling the definition of an enumeration type.
12449 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12451 UNDERLYING_TYPE is the type that will be used as the storage for
12452 the enumeration type. This should be NULL_TREE if no storage type
12455 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12457 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12459 Returns the type object, as yet incomplete.
12460 Also records info about it so that build_enumerator
12461 may be used to declare the individual values as they are read. */
12464 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12465 bool scoped_enum_p
, bool *is_new
)
12467 tree prevtype
= NULL_TREE
;
12468 gcc_assert (identifier_p (name
));
12472 /* [C++0x dcl.enum]p5:
12474 If not explicitly specified, the underlying type of a scoped
12475 enumeration type is int. */
12476 if (!underlying_type
&& scoped_enum_p
)
12477 underlying_type
= integer_type_node
;
12479 if (underlying_type
)
12480 underlying_type
= cv_unqualified (underlying_type
);
12482 /* If this is the real definition for a previous forward reference,
12483 fill in the contents in the same object that used to be the
12484 forward reference. */
12486 enumtype
= lookup_and_check_tag (enum_type
, name
,
12487 /*tag_scope=*/ts_current
,
12488 /*template_header_p=*/false);
12490 /* In case of a template_decl, the only check that should be deferred
12491 to instantiation time is the comparison of underlying types. */
12492 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12494 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12496 error_at (input_location
, "scoped/unscoped mismatch "
12497 "in enum %q#T", enumtype
);
12498 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12499 "previous definition here");
12500 enumtype
= error_mark_node
;
12502 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12504 error_at (input_location
, "underlying type mismatch "
12505 "in enum %q#T", enumtype
);
12506 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12507 "previous definition here");
12508 enumtype
= error_mark_node
;
12510 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12511 && !dependent_type_p (underlying_type
)
12512 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12513 && !same_type_p (underlying_type
,
12514 ENUM_UNDERLYING_TYPE (enumtype
)))
12516 error_at (input_location
, "different underlying type "
12517 "in enum %q#T", enumtype
);
12518 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12519 "previous definition here");
12520 underlying_type
= NULL_TREE
;
12524 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12525 || processing_template_decl
)
12527 /* In case of error, make a dummy enum to allow parsing to
12529 if (enumtype
== error_mark_node
)
12531 name
= make_anon_name ();
12532 enumtype
= NULL_TREE
;
12535 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12536 of an opaque enum, or an opaque enum of an already defined
12537 enumeration (C++0x only).
12538 In any other case, it'll be NULL_TREE. */
12544 prevtype
= enumtype
;
12546 /* Do not push the decl more than once, unless we need to
12547 compare underlying types at instantiation time */
12549 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12550 || (underlying_type
12551 && dependent_type_p (underlying_type
))
12552 || (ENUM_UNDERLYING_TYPE (enumtype
)
12553 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12555 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12556 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12559 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12562 if (enumtype
== error_mark_node
)
12563 return error_mark_node
;
12565 /* The enum is considered opaque until the opening '{' of the
12566 enumerator list. */
12567 SET_OPAQUE_ENUM_P (enumtype
, true);
12568 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12571 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12573 if (underlying_type
)
12575 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12577 copy_type_enum (enumtype
, underlying_type
);
12578 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12580 else if (dependent_type_p (underlying_type
))
12581 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12583 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12584 underlying_type
, enumtype
);
12587 /* If into a template class, the returned enum is always the first
12588 declaration (opaque or not) seen. This way all the references to
12589 this type will be to the same declaration. The following ones are used
12590 only to check for definition errors. */
12591 if (prevtype
&& processing_template_decl
)
12597 /* After processing and defining all the values of an enumeration type,
12598 install their decls in the enumeration type.
12599 ENUMTYPE is the type object. */
12602 finish_enum_value_list (tree enumtype
)
12605 tree underlying_type
;
12608 tree minnode
, maxnode
;
12611 bool fixed_underlying_type_p
12612 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12614 /* We built up the VALUES in reverse order. */
12615 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12617 /* For an enum defined in a template, just set the type of the values;
12618 all further processing is postponed until the template is
12619 instantiated. We need to set the type so that tsubst of a CONST_DECL
12621 if (processing_template_decl
)
12623 for (values
= TYPE_VALUES (enumtype
);
12625 values
= TREE_CHAIN (values
))
12626 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12630 /* Determine the minimum and maximum values of the enumerators. */
12631 if (TYPE_VALUES (enumtype
))
12633 minnode
= maxnode
= NULL_TREE
;
12635 for (values
= TYPE_VALUES (enumtype
);
12637 values
= TREE_CHAIN (values
))
12639 decl
= TREE_VALUE (values
);
12641 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12642 each enumerator has the type of its enumeration. Prior to the
12643 closing brace, the type of each enumerator is the type of its
12644 initializing value. */
12645 TREE_TYPE (decl
) = enumtype
;
12647 /* Update the minimum and maximum values, if appropriate. */
12648 value
= DECL_INITIAL (decl
);
12649 if (value
== error_mark_node
)
12650 value
= integer_zero_node
;
12651 /* Figure out what the minimum and maximum values of the
12652 enumerators are. */
12654 minnode
= maxnode
= value
;
12655 else if (tree_int_cst_lt (maxnode
, value
))
12657 else if (tree_int_cst_lt (value
, minnode
))
12664 If the enumerator-list is empty, the underlying type is as if
12665 the enumeration had a single enumerator with value 0. */
12666 minnode
= maxnode
= integer_zero_node
;
12668 if (!fixed_underlying_type_p
)
12670 /* Compute the number of bits require to represent all values of the
12671 enumeration. We must do this before the type of MINNODE and
12672 MAXNODE are transformed, since tree_int_cst_min_precision relies
12673 on the TREE_TYPE of the value it is passed. */
12674 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12675 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12676 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12677 int precision
= MAX (lowprec
, highprec
);
12679 bool use_short_enum
;
12681 /* Determine the underlying type of the enumeration.
12685 The underlying type of an enumeration is an integral type that
12686 can represent all the enumerator values defined in the
12687 enumeration. It is implementation-defined which integral type is
12688 used as the underlying type for an enumeration except that the
12689 underlying type shall not be larger than int unless the value of
12690 an enumerator cannot fit in an int or unsigned int.
12692 We use "int" or an "unsigned int" as the underlying type, even if
12693 a smaller integral type would work, unless the user has
12694 explicitly requested that we use the smallest possible type. The
12695 user can request that for all enumerations with a command line
12696 flag, or for just one enumeration with an attribute. */
12698 use_short_enum
= flag_short_enums
12699 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12701 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12705 underlying_type
= integer_types
[itk
];
12706 if (underlying_type
!= NULL_TREE
12707 && TYPE_PRECISION (underlying_type
) >= precision
12708 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12711 if (itk
== itk_none
)
12715 IF no integral type can represent all the enumerator values, the
12716 enumeration is ill-formed. */
12717 error ("no integral type can represent all of the enumerator values "
12718 "for %qT", enumtype
);
12719 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12720 underlying_type
= integer_types
[itk_unsigned_long_long
];
12725 The value of sizeof() applied to an enumeration type, an object
12726 of an enumeration type, or an enumerator, is the value of sizeof()
12727 applied to the underlying type. */
12728 copy_type_enum (enumtype
, underlying_type
);
12730 /* Compute the minimum and maximum values for the type.
12734 For an enumeration where emin is the smallest enumerator and emax
12735 is the largest, the values of the enumeration are the values of the
12736 underlying type in the range bmin to bmax, where bmin and bmax are,
12737 respectively, the smallest and largest values of the smallest bit-
12738 field that can store emin and emax. */
12740 /* The middle-end currently assumes that types with TYPE_PRECISION
12741 narrower than their underlying type are suitably zero or sign
12742 extended to fill their mode. Similarly, it assumes that the front
12743 end assures that a value of a particular type must be within
12744 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12746 We used to set these fields based on bmin and bmax, but that led
12747 to invalid assumptions like optimizing away bounds checking. So
12748 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12749 TYPE_MAX_VALUE to the values for the mode above and only restrict
12750 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12751 ENUM_UNDERLYING_TYPE (enumtype
)
12752 = build_distinct_type_copy (underlying_type
);
12753 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12754 set_min_and_max_values_for_integral_type
12755 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12757 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12758 if (flag_strict_enums
)
12759 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12763 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12765 /* Convert each of the enumerators to the type of the underlying
12766 type of the enumeration. */
12767 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12769 location_t saved_location
;
12771 decl
= TREE_VALUE (values
);
12772 saved_location
= input_location
;
12773 input_location
= DECL_SOURCE_LOCATION (decl
);
12774 if (fixed_underlying_type_p
)
12775 /* If the enumeration type has a fixed underlying type, we
12776 already checked all of the enumerator values. */
12777 value
= DECL_INITIAL (decl
);
12779 value
= perform_implicit_conversion (underlying_type
,
12780 DECL_INITIAL (decl
),
12781 tf_warning_or_error
);
12782 input_location
= saved_location
;
12784 /* Do not clobber shared ints. */
12785 value
= copy_node (value
);
12787 TREE_TYPE (value
) = enumtype
;
12788 DECL_INITIAL (decl
) = value
;
12791 /* Fix up all variant types of this enum type. */
12792 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12793 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12795 if (at_class_scope_p ()
12796 && COMPLETE_TYPE_P (current_class_type
)
12797 && UNSCOPED_ENUM_P (enumtype
))
12798 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12799 current_class_type
);
12801 /* Finish debugging output for this type. */
12802 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12805 /* Finishes the enum type. This is called only the first time an
12806 enumeration is seen, be it opaque or odinary.
12807 ENUMTYPE is the type object. */
12810 finish_enum (tree enumtype
)
12812 if (processing_template_decl
)
12814 if (at_function_scope_p ())
12815 add_stmt (build_min (TAG_DEFN
, enumtype
));
12819 /* If this is a forward declaration, there should not be any variants,
12820 though we can get a variant in the middle of an enum-specifier with
12821 wacky code like 'enum E { e = sizeof(const E*) };' */
12822 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12823 && (TYPE_VALUES (enumtype
)
12824 || !TYPE_NEXT_VARIANT (enumtype
)));
12827 /* Build and install a CONST_DECL for an enumeration constant of the
12828 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12829 LOC is the location of NAME.
12830 Assignment of sequential values by default is handled here. */
12833 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12839 /* If the VALUE was erroneous, pretend it wasn't there; that will
12840 result in the enum being assigned the next value in sequence. */
12841 if (value
== error_mark_node
)
12844 /* Remove no-op casts from the value. */
12846 STRIP_TYPE_NOPS (value
);
12848 if (! processing_template_decl
)
12850 /* Validate and default VALUE. */
12851 if (value
!= NULL_TREE
)
12853 value
= cxx_constant_value (value
);
12855 if (TREE_CODE (value
) != INTEGER_CST
12856 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12858 error ("enumerator value for %qD is not an integer constant",
12864 /* Default based on previous value. */
12865 if (value
== NULL_TREE
)
12867 if (TYPE_VALUES (enumtype
))
12872 /* C++03 7.2/4: If no initializer is specified for the first
12873 enumerator, the type is an unspecified integral
12874 type. Otherwise the type is the same as the type of the
12875 initializing value of the preceding enumerator unless the
12876 incremented value is not representable in that type, in
12877 which case the type is an unspecified integral type
12878 sufficient to contain the incremented value. */
12879 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12880 if (error_operand_p (prev_value
))
12881 value
= error_mark_node
;
12884 double_int di
= TREE_INT_CST (prev_value
)
12885 .add_with_sign (double_int_one
,
12886 false, &overflowed
);
12889 tree type
= TREE_TYPE (prev_value
);
12890 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12891 if (!double_int_fits_to_tree_p (type
, di
))
12894 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12896 type
= integer_types
[itk
];
12897 if (type
!= NULL_TREE
12898 && (pos
|| !TYPE_UNSIGNED (type
))
12899 && double_int_fits_to_tree_p (type
, di
))
12902 if (type
&& cxx_dialect
< cxx11
12903 && itk
> itk_unsigned_long
)
12904 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12905 incremented enumerator value is too large for %<unsigned long%>" : "\
12906 incremented enumerator value is too large for %<long%>");
12908 if (type
== NULL_TREE
)
12911 value
= double_int_to_tree (type
, di
);
12916 error ("overflow in enumeration values at %qD", name
);
12917 value
= error_mark_node
;
12922 value
= integer_zero_node
;
12925 /* Remove no-op casts from the value. */
12926 STRIP_TYPE_NOPS (value
);
12928 /* If the underlying type of the enum is fixed, check whether
12929 the enumerator values fits in the underlying type. If it
12930 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12931 if (ENUM_UNDERLYING_TYPE (enumtype
)
12933 && TREE_CODE (value
) == INTEGER_CST
)
12935 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12936 error ("enumerator value %E is outside the range of underlying "
12937 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12939 /* Convert the value to the appropriate type. */
12940 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12944 /* C++ associates enums with global, function, or class declarations. */
12945 context
= current_scope ();
12947 /* Build the actual enumeration constant. Note that the enumeration
12948 constants have the underlying type of the enum (if it is fixed)
12949 or the type of their initializer (if the underlying type of the
12950 enum is not fixed):
12954 If the underlying type is fixed, the type of each enumerator
12955 prior to the closing brace is the underlying type; if the
12956 initializing value of an enumerator cannot be represented by
12957 the underlying type, the program is ill-formed. If the
12958 underlying type is not fixed, the type of each enumerator is
12959 the type of its initializing value.
12961 If the underlying type is not fixed, it will be computed by
12962 finish_enum and we will reset the type of this enumerator. Of
12963 course, if we're processing a template, there may be no value. */
12964 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12966 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12968 DECL_CONTEXT (decl
) = enumtype
;
12969 TREE_CONSTANT (decl
) = 1;
12970 TREE_READONLY (decl
) = 1;
12971 DECL_INITIAL (decl
) = value
;
12973 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12974 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12975 on the TYPE_FIELDS list for `S'. (That's so that you can say
12976 things like `S::i' later.) */
12977 finish_member_declaration (decl
);
12981 /* Add this enumeration constant to the list for this type. */
12982 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12985 /* Look for an enumerator with the given NAME within the enumeration
12986 type ENUMTYPE. This routine is used primarily for qualified name
12987 lookup into an enumerator in C++0x, e.g.,
12989 enum class Color { Red, Green, Blue };
12991 Color color = Color::Red;
12993 Returns the value corresponding to the enumerator, or
12994 NULL_TREE if no such enumerator was found. */
12996 lookup_enumerator (tree enumtype
, tree name
)
12999 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13001 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13002 return e
? TREE_VALUE (e
) : NULL_TREE
;
13006 /* We're defining DECL. Make sure that its type is OK. */
13009 check_function_type (tree decl
, tree current_function_parms
)
13011 tree fntype
= TREE_TYPE (decl
);
13012 tree return_type
= complete_type (TREE_TYPE (fntype
));
13014 /* In a function definition, arg types must be complete. */
13015 require_complete_types_for_parms (current_function_parms
);
13017 if (dependent_type_p (return_type
)
13018 || type_uses_auto (return_type
))
13020 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13021 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13023 tree args
= TYPE_ARG_TYPES (fntype
);
13025 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13026 error ("return type %q#T is incomplete", return_type
);
13028 error ("return type has Java class type %q#T", return_type
);
13030 /* Make it return void instead. */
13031 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13032 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13034 TREE_CHAIN (args
));
13036 fntype
= build_function_type (void_type_node
, args
);
13038 = build_exception_variant (fntype
,
13039 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13040 fntype
= (cp_build_type_attribute_variant
13041 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13042 TREE_TYPE (decl
) = fntype
;
13045 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13048 /* Create the FUNCTION_DECL for a function definition.
13049 DECLSPECS and DECLARATOR are the parts of the declaration;
13050 they describe the function's name and the type it returns,
13051 but twisted together in a fashion that parallels the syntax of C.
13053 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13054 DECLARATOR is really the DECL for the function we are about to
13055 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13056 indicating that the function is an inline defined in-class.
13058 This function creates a binding context for the function body
13059 as well as setting up the FUNCTION_DECL in current_function_decl.
13061 For C++, we must first check whether that datum makes any sense.
13062 For example, "class A local_a(1,2);" means that variable local_a
13063 is an aggregate of type A, which should have a constructor
13064 applied to it with the argument list [1, 2].
13066 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13067 or may be a BLOCK if the function has been defined previously
13068 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13069 error_mark_node if the function has never been defined, or
13070 a BLOCK if the function has been defined somewhere. */
13073 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13075 tree ctype
= NULL_TREE
;
13078 int doing_friend
= 0;
13079 cp_binding_level
*bl
;
13080 tree current_function_parms
;
13081 struct c_fileinfo
*finfo
13082 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13083 bool honor_interface
;
13085 /* Sanity check. */
13086 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13087 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13089 fntype
= TREE_TYPE (decl1
);
13090 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13091 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13093 /* ISO C++ 11.4/5. A friend function defined in a class is in
13094 the (lexical) scope of the class in which it is defined. */
13095 if (!ctype
&& DECL_FRIEND_P (decl1
))
13097 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13099 /* CTYPE could be null here if we're dealing with a template;
13100 for example, `inline friend float foo()' inside a template
13101 will have no CTYPE set. */
13102 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13108 if (DECL_DECLARED_INLINE_P (decl1
)
13109 && lookup_attribute ("noinline", attrs
))
13110 warning (0, "inline function %q+D given attribute noinline", decl1
);
13112 /* Handle gnu_inline attribute. */
13113 if (GNU_INLINE_P (decl1
))
13115 DECL_EXTERNAL (decl1
) = 1;
13116 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13117 DECL_INTERFACE_KNOWN (decl1
) = 1;
13118 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13121 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13122 /* This is a constructor, we must ensure that any default args
13123 introduced by this definition are propagated to the clones
13124 now. The clones are used directly in overload resolution. */
13125 adjust_clone_args (decl1
);
13127 /* Sometimes we don't notice that a function is a static member, and
13128 build a METHOD_TYPE for it. Fix that up now. */
13129 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13130 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13132 /* Set up current_class_type, and enter the scope of the class, if
13135 push_nested_class (ctype
);
13136 else if (DECL_STATIC_FUNCTION_P (decl1
))
13137 push_nested_class (DECL_CONTEXT (decl1
));
13139 /* Now that we have entered the scope of the class, we must restore
13140 the bindings for any template parameters surrounding DECL1, if it
13141 is an inline member template. (Order is important; consider the
13142 case where a template parameter has the same name as a field of
13143 the class.) It is not until after this point that
13144 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13145 if (flags
& SF_INCLASS_INLINE
)
13146 maybe_begin_member_template_processing (decl1
);
13148 /* Effective C++ rule 15. */
13150 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13151 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13152 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13154 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13155 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13156 if (!DECL_INITIAL (decl1
))
13157 DECL_INITIAL (decl1
) = error_mark_node
;
13159 /* This function exists in static storage.
13160 (This does not mean `static' in the C sense!) */
13161 TREE_STATIC (decl1
) = 1;
13163 /* We must call push_template_decl after current_class_type is set
13164 up. (If we are processing inline definitions after exiting a
13165 class scope, current_class_type will be NULL_TREE until set above
13166 by push_nested_class.) */
13167 if (processing_template_decl
)
13169 tree newdecl1
= push_template_decl (decl1
);
13170 if (newdecl1
== error_mark_node
)
13172 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13173 pop_nested_class ();
13179 /* We are now in the scope of the function being defined. */
13180 current_function_decl
= decl1
;
13182 /* Save the parm names or decls from this function's declarator
13183 where store_parm_decls will find them. */
13184 current_function_parms
= DECL_ARGUMENTS (decl1
);
13186 /* Make sure the parameter and return types are reasonable. When
13187 you declare a function, these types can be incomplete, but they
13188 must be complete when you define the function. */
13189 check_function_type (decl1
, current_function_parms
);
13191 /* Build the return declaration for the function. */
13192 restype
= TREE_TYPE (fntype
);
13194 if (DECL_RESULT (decl1
) == NULL_TREE
)
13198 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13199 DECL_ARTIFICIAL (resdecl
) = 1;
13200 DECL_IGNORED_P (resdecl
) = 1;
13201 DECL_RESULT (decl1
) = resdecl
;
13203 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13206 /* Let the user know we're compiling this function. */
13207 announce_function (decl1
);
13209 /* Record the decl so that the function name is defined.
13210 If we already have a decl for this name, and it is a FUNCTION_DECL,
13211 use the old decl. */
13212 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13214 /* A specialization is not used to guide overload resolution. */
13215 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13216 && !(DECL_USE_TEMPLATE (decl1
) &&
13217 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13219 tree olddecl
= pushdecl (decl1
);
13221 if (olddecl
== error_mark_node
)
13222 /* If something went wrong when registering the declaration,
13223 use DECL1; we have to have a FUNCTION_DECL to use when
13224 parsing the body of the function. */
13228 /* Otherwise, OLDDECL is either a previous declaration
13229 of the same function or DECL1 itself. */
13231 if (warn_missing_declarations
13232 && olddecl
== decl1
13233 && !DECL_MAIN_P (decl1
)
13234 && TREE_PUBLIC (decl1
)
13235 && !DECL_DECLARED_INLINE_P (decl1
))
13239 /* Check whether DECL1 is in an anonymous
13241 for (context
= DECL_CONTEXT (decl1
);
13243 context
= DECL_CONTEXT (context
))
13245 if (TREE_CODE (context
) == NAMESPACE_DECL
13246 && DECL_NAME (context
) == NULL_TREE
)
13250 if (context
== NULL
)
13251 warning (OPT_Wmissing_declarations
,
13252 "no previous declaration for %q+D", decl1
);
13260 /* We need to set the DECL_CONTEXT. */
13261 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13262 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13264 fntype
= TREE_TYPE (decl1
);
13265 restype
= TREE_TYPE (fntype
);
13267 /* If #pragma weak applies, mark the decl appropriately now.
13268 The pragma only applies to global functions. Because
13269 determining whether or not the #pragma applies involves
13270 computing the mangled name for the declaration, we cannot
13271 apply the pragma until after we have merged this declaration
13272 with any previous declarations; if the original declaration
13273 has a linkage specification, that specification applies to
13274 the definition as well, and may affect the mangled name. */
13275 if (DECL_FILE_SCOPE_P (decl1
))
13276 maybe_apply_pragma_weak (decl1
);
13279 /* Reset this in case the call to pushdecl changed it. */
13280 current_function_decl
= decl1
;
13282 gcc_assert (DECL_INITIAL (decl1
));
13284 /* This function may already have been parsed, in which case just
13285 return; our caller will skip over the body without parsing. */
13286 if (DECL_INITIAL (decl1
) != error_mark_node
)
13289 /* Initialize RTL machinery. We cannot do this until
13290 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13291 even when processing a template; this is how we get
13292 CFUN set up, and our per-function variables initialized.
13293 FIXME factor out the non-RTL stuff. */
13294 bl
= current_binding_level
;
13295 allocate_struct_function (decl1
, processing_template_decl
);
13297 /* Initialize the language data structures. Whenever we start
13298 a new function, we destroy temporaries in the usual way. */
13299 cfun
->language
= ggc_alloc_cleared_language_function ();
13300 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13301 current_binding_level
= bl
;
13303 if (!processing_template_decl
&& type_uses_auto (restype
))
13305 FNDECL_USED_AUTO (decl1
) = true;
13306 current_function_auto_return_pattern
= restype
;
13309 /* Start the statement-tree, start the tree now. */
13310 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13312 /* If we are (erroneously) defining a function that we have already
13313 defined before, wipe out what we knew before. */
13314 if (!DECL_PENDING_INLINE_P (decl1
))
13315 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13317 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13319 /* We know that this was set up by `grokclassfn'. We do not
13320 wait until `store_parm_decls', since evil parse errors may
13321 never get us to that point. Here we keep the consistency
13322 between `current_class_type' and `current_class_ptr'. */
13323 tree t
= DECL_ARGUMENTS (decl1
);
13325 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13326 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13328 cp_function_chain
->x_current_class_ref
13329 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13330 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13331 cp_function_chain
->x_current_class_ptr
= t
;
13333 /* Constructors and destructors need to know whether they're "in
13334 charge" of initializing virtual base classes. */
13335 t
= DECL_CHAIN (t
);
13336 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13338 current_in_charge_parm
= t
;
13339 t
= DECL_CHAIN (t
);
13341 if (DECL_HAS_VTT_PARM_P (decl1
))
13343 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13344 current_vtt_parm
= t
;
13348 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13349 /* Implicitly-defined methods (like the
13350 destructor for a class in which no destructor
13351 is explicitly declared) must not be defined
13352 until their definition is needed. So, we
13353 ignore interface specifications for
13354 compiler-generated functions. */
13355 && !DECL_ARTIFICIAL (decl1
));
13357 if (processing_template_decl
)
13358 /* Don't mess with interface flags. */;
13359 else if (DECL_INTERFACE_KNOWN (decl1
))
13361 tree ctx
= decl_function_context (decl1
);
13363 if (DECL_NOT_REALLY_EXTERN (decl1
))
13364 DECL_EXTERNAL (decl1
) = 0;
13366 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13367 /* This is a function in a local class in an extern inline
13368 or template function. */
13369 comdat_linkage (decl1
);
13371 /* If this function belongs to an interface, it is public.
13372 If it belongs to someone else's interface, it is also external.
13373 This only affects inlines and template instantiations. */
13374 else if (!finfo
->interface_unknown
&& honor_interface
)
13376 if (DECL_DECLARED_INLINE_P (decl1
)
13377 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13379 DECL_EXTERNAL (decl1
)
13380 = (finfo
->interface_only
13381 || (DECL_DECLARED_INLINE_P (decl1
)
13382 && ! flag_implement_inlines
13383 && !DECL_VINDEX (decl1
)));
13385 /* For WIN32 we also want to put these in linkonce sections. */
13386 maybe_make_one_only (decl1
);
13389 DECL_EXTERNAL (decl1
) = 0;
13390 DECL_INTERFACE_KNOWN (decl1
) = 1;
13391 /* If this function is in an interface implemented in this file,
13392 make sure that the back end knows to emit this function
13394 if (!DECL_EXTERNAL (decl1
))
13395 mark_needed (decl1
);
13397 else if (finfo
->interface_unknown
&& finfo
->interface_only
13398 && honor_interface
)
13400 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13401 interface, we will have both finfo->interface_unknown and
13402 finfo->interface_only set. In that case, we don't want to
13403 use the normal heuristics because someone will supply a
13404 #pragma implementation elsewhere, and deducing it here would
13405 produce a conflict. */
13406 comdat_linkage (decl1
);
13407 DECL_EXTERNAL (decl1
) = 0;
13408 DECL_INTERFACE_KNOWN (decl1
) = 1;
13409 DECL_DEFER_OUTPUT (decl1
) = 1;
13413 /* This is a definition, not a reference.
13414 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13415 if (!GNU_INLINE_P (decl1
))
13416 DECL_EXTERNAL (decl1
) = 0;
13418 if ((DECL_DECLARED_INLINE_P (decl1
)
13419 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13420 && ! DECL_INTERFACE_KNOWN (decl1
))
13421 DECL_DEFER_OUTPUT (decl1
) = 1;
13423 DECL_INTERFACE_KNOWN (decl1
) = 1;
13426 /* Determine the ELF visibility attribute for the function. We must not
13427 do this before calling "pushdecl", as we must allow "duplicate_decls"
13428 to merge any attributes appropriately. We also need to wait until
13430 if (!DECL_CLONED_FUNCTION_P (decl1
))
13431 determine_visibility (decl1
);
13433 begin_scope (sk_function_parms
, decl1
);
13437 if (DECL_DESTRUCTOR_P (decl1
)
13438 || (DECL_CONSTRUCTOR_P (decl1
)
13439 && targetm
.cxx
.cdtor_returns_this ()))
13441 cdtor_label
= build_decl (input_location
,
13442 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13443 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13446 start_fname_decls ();
13448 store_parm_decls (current_function_parms
);
13454 /* Like start_preparsed_function, except that instead of a
13455 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13457 Returns true on success. If the DECLARATOR is not suitable
13458 for a function, we return false, which tells the parser to
13459 skip the entire function. */
13462 start_function (cp_decl_specifier_seq
*declspecs
,
13463 const cp_declarator
*declarator
,
13468 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13469 if (decl1
== error_mark_node
)
13471 /* If the declarator is not suitable for a function definition,
13472 cause a syntax error. */
13473 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13475 error ("invalid function declaration");
13479 if (DECL_MAIN_P (decl1
))
13480 /* main must return int. grokfndecl should have corrected it
13481 (and issued a diagnostic) if the user got it wrong. */
13482 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13483 integer_type_node
));
13485 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13488 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13492 use_eh_spec_block (tree fn
)
13494 return (flag_exceptions
&& flag_enforce_eh_specs
13495 && !processing_template_decl
13496 && !type_throw_all_p (TREE_TYPE (fn
))
13497 /* We insert the EH_SPEC_BLOCK only in the original
13498 function; then, it is copied automatically to the
13500 && !DECL_CLONED_FUNCTION_P (fn
)
13501 /* Implicitly-generated constructors and destructors have
13502 exception specifications. However, those specifications
13503 are the union of the possible exceptions specified by the
13504 constructors/destructors for bases and members, so no
13505 unallowed exception will ever reach this function. By
13506 not creating the EH_SPEC_BLOCK we save a little memory,
13507 and we avoid spurious warnings about unreachable
13509 && !DECL_DEFAULTED_FN (fn
));
13512 /* Store the parameter declarations into the current function declaration.
13513 This is called after parsing the parameter declarations, before
13514 digesting the body of the function.
13516 Also install to binding contour return value identifier, if any. */
13519 store_parm_decls (tree current_function_parms
)
13521 tree fndecl
= current_function_decl
;
13524 /* This is a chain of any other decls that came in among the parm
13525 declarations. If a parm is declared with enum {foo, bar} x;
13526 then CONST_DECLs for foo and bar are put here. */
13527 tree nonparms
= NULL_TREE
;
13529 if (current_function_parms
)
13531 /* This case is when the function was defined with an ANSI prototype.
13532 The parms already have decls, so we need not do anything here
13533 except record them as in effect
13534 and complain if any redundant old-style parm decls were written. */
13536 tree specparms
= current_function_parms
;
13539 /* Must clear this because it might contain TYPE_DECLs declared
13541 current_binding_level
->names
= NULL
;
13543 /* If we're doing semantic analysis, then we'll call pushdecl
13544 for each of these. We must do them in reverse order so that
13545 they end in the correct forward order. */
13546 specparms
= nreverse (specparms
);
13548 for (parm
= specparms
; parm
; parm
= next
)
13550 next
= DECL_CHAIN (parm
);
13551 if (TREE_CODE (parm
) == PARM_DECL
)
13553 if (DECL_NAME (parm
) == NULL_TREE
13554 || !VOID_TYPE_P (parm
))
13557 error ("parameter %qD declared void", parm
);
13561 /* If we find an enum constant or a type tag,
13562 put it aside for the moment. */
13563 TREE_CHAIN (parm
) = NULL_TREE
;
13564 nonparms
= chainon (nonparms
, parm
);
13568 /* Get the decls in their original chain order and record in the
13569 function. This is all and only the PARM_DECLs that were
13570 pushed into scope by the loop above. */
13571 DECL_ARGUMENTS (fndecl
) = getdecls ();
13574 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13576 /* Now store the final chain of decls for the arguments
13577 as the decl-chain of the current lexical scope.
13578 Put the enumerators in as well, at the front so that
13579 DECL_ARGUMENTS is not modified. */
13580 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13582 if (use_eh_spec_block (current_function_decl
))
13583 current_eh_spec_block
= begin_eh_spec_block ();
13587 /* We have finished doing semantic analysis on DECL, but have not yet
13588 generated RTL for its body. Save away our current state, so that
13589 when we want to generate RTL later we know what to do. */
13592 save_function_data (tree decl
)
13594 struct language_function
*f
;
13596 /* Save the language-specific per-function data so that we can
13597 get it back when we really expand this function. */
13598 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13601 f
= ggc_alloc_language_function ();
13602 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13603 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13605 /* Clear out the bits we don't need. */
13606 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13607 f
->bindings
= NULL
;
13608 f
->x_local_names
= NULL
;
13609 f
->base
.local_typedefs
= NULL
;
13613 /* Set the return value of the constructor (if present). */
13616 finish_constructor_body (void)
13621 if (targetm
.cxx
.cdtor_returns_this ()
13622 && (! TYPE_FOR_JAVA (current_class_type
)))
13624 /* Any return from a constructor will end up here. */
13625 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13627 val
= DECL_ARGUMENTS (current_function_decl
);
13628 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13629 DECL_RESULT (current_function_decl
), val
);
13630 /* Return the address of the object. */
13631 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13632 add_stmt (exprstmt
);
13636 /* Do all the processing for the beginning of a destructor; set up the
13637 vtable pointers and cleanups for bases and members. */
13640 begin_destructor_body (void)
13642 tree compound_stmt
;
13644 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13645 issued an error message. We still want to try to process the
13646 body of the function, but initialize_vtbl_ptrs will crash if
13647 TYPE_BINFO is NULL. */
13648 if (COMPLETE_TYPE_P (current_class_type
))
13650 compound_stmt
= begin_compound_stmt (0);
13651 /* Make all virtual function table pointers in non-virtual base
13652 classes point to CURRENT_CLASS_TYPE's virtual function
13654 initialize_vtbl_ptrs (current_class_ptr
);
13655 finish_compound_stmt (compound_stmt
);
13657 /* Insert a cleanup to let the back end know that the object is dead
13658 when we exit the destructor, either normally or via exception. */
13659 tree clobber
= build_constructor (current_class_type
, NULL
);
13660 TREE_THIS_VOLATILE (clobber
) = true;
13661 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13662 current_class_ref
, clobber
);
13663 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13665 /* And insert cleanups for our bases and members so that they
13666 will be properly destroyed if we throw. */
13667 push_base_cleanups ();
13671 /* At the end of every destructor we generate code to delete the object if
13672 necessary. Do that now. */
13675 finish_destructor_body (void)
13679 /* Any return from a destructor will end up here; that way all base
13680 and member cleanups will be run when the function returns. */
13681 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13683 /* In a virtual destructor, we must call delete. */
13684 if (DECL_VIRTUAL_P (current_function_decl
))
13687 tree virtual_size
= cxx_sizeof (current_class_type
);
13691 At the point of definition of a virtual destructor (including
13692 an implicit definition), non-placement operator delete shall
13693 be looked up in the scope of the destructor's class and if
13694 found shall be accessible and unambiguous. */
13695 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13697 /*global_p=*/false,
13698 /*placement=*/NULL_TREE
,
13699 /*alloc_fn=*/NULL_TREE
,
13700 tf_warning_or_error
);
13702 if_stmt
= begin_if_stmt ();
13703 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13704 current_in_charge_parm
,
13707 finish_expr_stmt (exprstmt
);
13708 finish_then_clause (if_stmt
);
13709 finish_if_stmt (if_stmt
);
13712 if (targetm
.cxx
.cdtor_returns_this ())
13716 val
= DECL_ARGUMENTS (current_function_decl
);
13717 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13718 DECL_RESULT (current_function_decl
), val
);
13719 /* Return the address of the object. */
13720 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13721 add_stmt (exprstmt
);
13725 /* Do the necessary processing for the beginning of a function body, which
13726 in this case includes member-initializers, but not the catch clauses of
13727 a function-try-block. Currently, this means opening a binding level
13728 for the member-initializers (in a ctor), member cleanups (in a dtor),
13729 and capture proxies (in a lambda operator()). */
13732 begin_function_body (void)
13736 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13739 if (processing_template_decl
)
13740 /* Do nothing now. */;
13742 /* Always keep the BLOCK node associated with the outermost pair of
13743 curly braces of a function. These are needed for correct
13744 operation of dwarfout.c. */
13745 keep_next_level (true);
13747 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13749 if (processing_template_decl
)
13750 /* Do nothing now. */;
13751 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13752 begin_destructor_body ();
13757 /* Do the processing for the end of a function body. Currently, this means
13758 closing out the cleanups for fully-constructed bases and members, and in
13759 the case of the destructor, deleting the object if desired. Again, this
13760 is only meaningful for [cd]tors, since they are the only functions where
13761 there is a significant distinction between the main body and any
13762 function catch clauses. Handling, say, main() return semantics here
13763 would be wrong, as flowing off the end of a function catch clause for
13764 main() would also need to return 0. */
13767 finish_function_body (tree compstmt
)
13769 if (compstmt
== NULL_TREE
)
13772 /* Close the block. */
13773 finish_compound_stmt (compstmt
);
13775 if (processing_template_decl
)
13776 /* Do nothing now. */;
13777 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13778 finish_constructor_body ();
13779 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13780 finish_destructor_body ();
13783 /* Given a function, returns the BLOCK corresponding to the outermost level
13784 of curly braces, skipping the artificial block created for constructor
13788 outer_curly_brace_block (tree fndecl
)
13790 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13791 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13792 /* Skip the artificial function body block. */
13793 block
= BLOCK_SUBBLOCKS (block
);
13797 /* If FNDECL is a class's key method, add the class to the list of
13798 keyed classes that should be emitted. */
13801 record_key_method_defined (tree fndecl
)
13803 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13804 && DECL_VIRTUAL_P (fndecl
)
13805 && !processing_template_decl
)
13807 tree fnclass
= DECL_CONTEXT (fndecl
);
13808 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13809 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13813 /* Subroutine of finish_function.
13814 Save the body of constexpr functions for possible
13815 future compile time evaluation. */
13818 maybe_save_function_definition (tree fun
)
13820 if (!processing_template_decl
13821 && DECL_DECLARED_CONSTEXPR_P (fun
)
13822 && !DECL_CLONED_FUNCTION_P (fun
))
13823 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13826 /* Finish up a function declaration and compile that function
13827 all the way to assembler language output. The free the storage
13828 for the function definition.
13830 FLAGS is a bitwise or of the following values:
13832 We just finished processing the body of an in-class inline
13833 function definition. (This processing will have taken place
13834 after the class definition is complete.) */
13837 finish_function (int flags
)
13839 tree fndecl
= current_function_decl
;
13840 tree fntype
, ctype
= NULL_TREE
;
13841 int inclass_inline
= (flags
& 2) != 0;
13843 /* When we get some parse errors, we can end up without a
13844 current_function_decl, so cope. */
13845 if (fndecl
== NULL_TREE
)
13846 return error_mark_node
;
13848 if (c_dialect_objc ())
13849 objc_finish_function ();
13851 gcc_assert (!defer_mark_used_calls
);
13852 defer_mark_used_calls
= true;
13854 record_key_method_defined (fndecl
);
13856 fntype
= TREE_TYPE (fndecl
);
13858 /* TREE_READONLY (fndecl) = 1;
13859 This caused &foo to be of type ptr-to-const-function
13860 which then got a warning when stored in a ptr-to-function variable. */
13862 gcc_assert (building_stmt_list_p ());
13863 /* The current function is being defined, so its DECL_INITIAL should
13864 be set, and unless there's a multiple definition, it should be
13865 error_mark_node. */
13866 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13868 /* For a cloned function, we've already got all the code we need;
13869 there's no need to add any extra bits. */
13870 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13872 /* Make it so that `main' always returns 0 by default. */
13873 if (DECL_MAIN_P (current_function_decl
))
13874 finish_return_stmt (integer_zero_node
);
13876 if (use_eh_spec_block (current_function_decl
))
13877 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13878 (TREE_TYPE (current_function_decl
)),
13879 current_eh_spec_block
);
13882 /* If we're saving up tree structure, tie off the function now. */
13883 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13885 finish_fname_decls ();
13887 /* If this function can't throw any exceptions, remember that. */
13888 if (!processing_template_decl
13889 && !cp_function_chain
->can_throw
13890 && !flag_non_call_exceptions
13891 && !decl_replaceable_p (fndecl
))
13892 TREE_NOTHROW (fndecl
) = 1;
13894 /* This must come after expand_function_end because cleanups might
13895 have declarations (from inline functions) that need to go into
13896 this function's blocks. */
13898 /* If the current binding level isn't the outermost binding level
13899 for this function, either there is a bug, or we have experienced
13900 syntax errors and the statement tree is malformed. */
13901 if (current_binding_level
->kind
!= sk_function_parms
)
13903 /* Make sure we have already experienced errors. */
13904 gcc_assert (errorcount
);
13906 /* Throw away the broken statement tree and extra binding
13908 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13910 while (current_binding_level
->kind
!= sk_function_parms
)
13912 if (current_binding_level
->kind
== sk_class
)
13913 pop_nested_class ();
13915 poplevel (0, 0, 0);
13918 poplevel (1, 0, 1);
13920 /* Statements should always be full-expressions at the outermost set
13921 of curly braces for a function. */
13922 gcc_assert (stmts_are_full_exprs_p ());
13924 /* If there are no return statements in a function with auto return type,
13925 the return type is void. But if the declared type is something like
13926 auto*, this is an error. */
13927 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13928 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13930 if (!is_auto (current_function_auto_return_pattern
)
13931 && !current_function_returns_value
&& !current_function_returns_null
)
13933 error ("no return statements in function returning %qT",
13934 current_function_auto_return_pattern
);
13935 inform (input_location
, "only plain %<auto%> return type can be "
13936 "deduced to %<void%>");
13938 apply_deduced_return_type (fndecl
, void_type_node
);
13939 fntype
= TREE_TYPE (fndecl
);
13942 /* Save constexpr function body before it gets munged by
13943 the NRV transformation. */
13944 maybe_save_function_definition (fndecl
);
13946 /* Set up the named return value optimization, if we can. Candidate
13947 variables are selected in check_return_expr. */
13948 if (current_function_return_value
)
13950 tree r
= current_function_return_value
;
13953 if (r
!= error_mark_node
13954 /* This is only worth doing for fns that return in memory--and
13955 simpler, since we don't have to worry about promoted modes. */
13956 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13957 /* Only allow this for variables declared in the outer scope of
13958 the function so we know that their lifetime always ends with a
13959 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13960 we were to do this optimization in tree-ssa. */
13961 && (outer
= outer_curly_brace_block (fndecl
))
13962 && chain_member (r
, BLOCK_VARS (outer
)))
13963 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13965 current_function_return_value
= NULL_TREE
;
13968 /* Remember that we were in class scope. */
13969 if (current_class_name
)
13970 ctype
= current_class_type
;
13972 /* Must mark the RESULT_DECL as being in this function. */
13973 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13975 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13976 to the FUNCTION_DECL node itself. */
13977 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13979 /* Save away current state, if appropriate. */
13980 if (!processing_template_decl
)
13981 save_function_data (fndecl
);
13983 /* Complain if there's just no return statement. */
13984 if (warn_return_type
13985 && !VOID_TYPE_P (TREE_TYPE (fntype
))
13986 && !dependent_type_p (TREE_TYPE (fntype
))
13987 && !current_function_returns_value
&& !current_function_returns_null
13988 /* Don't complain if we abort or throw. */
13989 && !current_function_returns_abnormally
13990 /* Don't complain if we are declared noreturn. */
13991 && !TREE_THIS_VOLATILE (fndecl
)
13992 && !DECL_NAME (DECL_RESULT (fndecl
))
13993 && !TREE_NO_WARNING (fndecl
)
13994 /* Structor return values (if any) are set by the compiler. */
13995 && !DECL_CONSTRUCTOR_P (fndecl
)
13996 && !DECL_DESTRUCTOR_P (fndecl
)
13997 && targetm
.warn_func_return (fndecl
))
13999 warning (OPT_Wreturn_type
,
14000 "no return statement in function returning non-void");
14001 TREE_NO_WARNING (fndecl
) = 1;
14004 /* Store the end of the function, so that we get good line number
14005 info for the epilogue. */
14006 cfun
->function_end_locus
= input_location
;
14008 /* Complain about parameters that are only set, but never otherwise used. */
14009 if (warn_unused_but_set_parameter
14010 && !processing_template_decl
14011 && errorcount
== unused_but_set_errorcount
14012 && !DECL_CLONED_FUNCTION_P (fndecl
))
14016 for (decl
= DECL_ARGUMENTS (fndecl
);
14018 decl
= DECL_CHAIN (decl
))
14019 if (TREE_USED (decl
)
14020 && TREE_CODE (decl
) == PARM_DECL
14021 && !DECL_READ_P (decl
)
14022 && DECL_NAME (decl
)
14023 && !DECL_ARTIFICIAL (decl
)
14024 && !TREE_NO_WARNING (decl
)
14025 && !DECL_IN_SYSTEM_HEADER (decl
)
14026 && TREE_TYPE (decl
) != error_mark_node
14027 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14028 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14029 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14030 warning (OPT_Wunused_but_set_parameter
,
14031 "parameter %q+D set but not used", decl
);
14032 unused_but_set_errorcount
= errorcount
;
14035 /* Complain about locally defined typedefs that are not used in this
14037 maybe_warn_unused_local_typedefs ();
14039 /* Genericize before inlining. */
14040 if (!processing_template_decl
)
14042 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14043 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14044 cp_genericize (fndecl
);
14045 /* Clear out the bits we don't need. */
14046 f
->x_current_class_ptr
= NULL
;
14047 f
->x_current_class_ref
= NULL
;
14048 f
->x_eh_spec_block
= NULL
;
14049 f
->x_in_charge_parm
= NULL
;
14050 f
->x_vtt_parm
= NULL
;
14051 f
->x_return_value
= NULL
;
14052 f
->bindings
= NULL
;
14053 f
->extern_decl_map
= NULL
;
14055 /* Clear out the bits we don't need. */
14056 local_names
= NULL
;
14058 /* We're leaving the context of this function, so zap cfun. It's still in
14059 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14061 current_function_decl
= NULL
;
14063 /* If this is an in-class inline definition, we may have to pop the
14064 bindings for the template parameters that we added in
14065 maybe_begin_member_template_processing when start_function was
14067 if (inclass_inline
)
14068 maybe_end_member_template_processing ();
14070 /* Leave the scope of the class. */
14072 pop_nested_class ();
14077 current_function_decl
= NULL_TREE
;
14079 defer_mark_used_calls
= false;
14080 if (deferred_mark_used_calls
)
14085 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14087 vec_free (deferred_mark_used_calls
);
14093 /* Create the FUNCTION_DECL for a function definition.
14094 DECLSPECS and DECLARATOR are the parts of the declaration;
14095 they describe the return type and the name of the function,
14096 but twisted together in a fashion that parallels the syntax of C.
14098 This function creates a binding context for the function body
14099 as well as setting up the FUNCTION_DECL in current_function_decl.
14101 Returns a FUNCTION_DECL on success.
14103 If the DECLARATOR is not suitable for a function (it defines a datum
14104 instead), we return 0, which tells yyparse to report a parse error.
14106 May return void_type_node indicating that this method is actually
14107 a friend. See grokfield for more details.
14109 Came here with a `.pushlevel' .
14111 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14112 CHANGES TO CODE IN `grokfield'. */
14115 grokmethod (cp_decl_specifier_seq
*declspecs
,
14116 const cp_declarator
*declarator
, tree attrlist
)
14118 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14121 if (fndecl
== error_mark_node
)
14122 return error_mark_node
;
14124 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14126 error ("invalid member function declaration");
14127 return error_mark_node
;
14131 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14133 /* Pass friends other than inline friend functions back. */
14134 if (fndecl
== void_type_node
)
14137 if (DECL_IN_AGGR_P (fndecl
))
14139 if (DECL_CLASS_SCOPE_P (fndecl
))
14140 error ("%qD is already defined in class %qT", fndecl
,
14141 DECL_CONTEXT (fndecl
));
14142 return error_mark_node
;
14145 check_template_shadow (fndecl
);
14147 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14148 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14150 /* We process method specializations in finish_struct_1. */
14151 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14153 fndecl
= push_template_decl (fndecl
);
14154 if (fndecl
== error_mark_node
)
14158 if (! DECL_FRIEND_P (fndecl
))
14160 if (DECL_CHAIN (fndecl
))
14162 fndecl
= copy_node (fndecl
);
14163 TREE_CHAIN (fndecl
) = NULL_TREE
;
14167 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14169 DECL_IN_AGGR_P (fndecl
) = 1;
14174 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14175 we can lay it out later, when and if its type becomes complete.
14177 Also handle constexpr pointer to member variables where the initializer
14178 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14181 maybe_register_incomplete_var (tree var
)
14183 gcc_assert (VAR_P (var
));
14185 /* Keep track of variables with incomplete types. */
14186 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14187 && DECL_EXTERNAL (var
))
14189 tree inner_type
= TREE_TYPE (var
);
14191 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14192 inner_type
= TREE_TYPE (inner_type
);
14193 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14195 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14196 /* RTTI TD entries are created while defining the type_info. */
14197 || (TYPE_LANG_SPECIFIC (inner_type
)
14198 && TYPE_BEING_DEFINED (inner_type
)))
14200 incomplete_var iv
= {var
, inner_type
};
14201 vec_safe_push (incomplete_vars
, iv
);
14203 else if (TYPE_PTRMEM_P (inner_type
)
14204 && DECL_INITIAL (var
)
14205 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14207 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14208 gcc_assert (TYPE_BEING_DEFINED (context
));
14209 incomplete_var iv
= {var
, context
};
14210 vec_safe_push (incomplete_vars
, iv
);
14215 /* Called when a class type (given by TYPE) is defined. If there are
14216 any existing VAR_DECLs whose type has been completed by this
14217 declaration, update them now. */
14220 complete_vars (tree type
)
14223 incomplete_var
*iv
;
14225 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14227 if (same_type_p (type
, iv
->incomplete_type
))
14229 tree var
= iv
->decl
;
14230 tree type
= TREE_TYPE (var
);
14232 if (TYPE_PTRMEM_P (type
))
14233 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14236 /* Complete the type of the variable. The VAR_DECL itself
14237 will be laid out in expand_expr. */
14238 complete_type (type
);
14239 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14242 /* Remove this entry from the list. */
14243 incomplete_vars
->unordered_remove (ix
);
14249 /* Check for pending declarations which may have abstract type. */
14250 complete_type_check_abstract (type
);
14253 /* If DECL is of a type which needs a cleanup, build and return an
14254 expression to perform that cleanup here. Return NULL_TREE if no
14255 cleanup need be done. */
14258 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14264 /* Assume no cleanup is required. */
14265 cleanup
= NULL_TREE
;
14267 if (error_operand_p (decl
))
14270 /* Handle "__attribute__((cleanup))". We run the cleanup function
14271 before the destructor since the destructor is what actually
14272 terminates the lifetime of the object. */
14273 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14280 /* Get the name specified by the user for the cleanup function. */
14281 id
= TREE_VALUE (TREE_VALUE (attr
));
14282 /* Look up the name to find the cleanup function to call. It is
14283 important to use lookup_name here because that is what is
14284 used in c-common.c:handle_cleanup_attribute when performing
14285 initial checks on the attribute. Note that those checks
14286 include ensuring that the function found is not an overloaded
14287 function, or an object with an overloaded call operator,
14288 etc.; we can rely on the fact that the function found is an
14289 ordinary FUNCTION_DECL. */
14290 fn
= lookup_name (id
);
14291 arg
= build_address (decl
);
14293 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14294 if (cleanup
== error_mark_node
)
14295 return error_mark_node
;
14297 /* Handle ordinary C++ destructors. */
14298 type
= TREE_TYPE (decl
);
14299 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
14301 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14302 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
14303 && CLASSTYPE_VBASECLASSES (type
));
14307 if (TREE_CODE (type
) == ARRAY_TYPE
)
14310 addr
= build_address (decl
);
14312 /* Optimize for space over speed here. */
14313 if (!has_vbases
|| flag_expensive_optimizations
)
14314 flags
|= LOOKUP_NONVIRTUAL
;
14316 call
= build_delete (TREE_TYPE (addr
), addr
,
14317 sfk_complete_destructor
, flags
, 0, complain
);
14318 if (call
== error_mark_node
)
14319 cleanup
= error_mark_node
;
14321 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14326 /* build_delete sets the location of the destructor call to the
14327 current location, even though the destructor is going to be
14328 called later, at the end of the current scope. This can lead to
14329 a "jumpy" behaviour for users of debuggers when they step around
14330 the end of the block. So let's unset the location of the
14331 destructor call instead. */
14332 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14333 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14338 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14339 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14340 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14343 static_fn_type (tree memfntype
)
14348 if (TYPE_PTRMEMFUNC_P (memfntype
))
14349 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14350 if (POINTER_TYPE_P (memfntype
)
14351 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14352 memfntype
= TREE_TYPE (memfntype
);
14353 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14355 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14356 args
= TYPE_ARG_TYPES (memfntype
);
14357 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14358 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14359 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14360 fntype
= (cp_build_type_attribute_variant
14361 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14362 fntype
= (build_exception_variant
14363 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14367 /* DECL was originally constructed as a non-static member function,
14368 but turned out to be static. Update it accordingly. */
14371 revert_static_member_fn (tree decl
)
14373 tree stype
= static_fn_type (decl
);
14374 cp_cv_quals quals
= type_memfn_quals (stype
);
14375 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14377 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14378 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14380 TREE_TYPE (decl
) = stype
;
14382 if (DECL_ARGUMENTS (decl
))
14383 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14384 DECL_STATIC_FUNCTION_P (decl
) = 1;
14387 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14388 one of the language-independent trees. */
14390 enum cp_tree_node_structure_enum
14391 cp_tree_node_structure (union lang_tree_node
* t
)
14393 switch (TREE_CODE (&t
->generic
))
14395 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14396 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14397 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14398 case OVERLOAD
: return TS_CP_OVERLOAD
;
14399 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14400 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14401 case BASELINK
: return TS_CP_BASELINK
;
14402 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14403 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14404 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14405 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14406 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14407 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14408 default: return TS_CP_GENERIC
;
14412 /* Build the void_list_node (void_type_node having been created). */
14414 build_void_list_node (void)
14416 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14421 cp_missing_noreturn_ok_p (tree decl
)
14423 /* A missing noreturn is ok for the `main' function. */
14424 return DECL_MAIN_P (decl
);
14427 /* Return the COMDAT group into which DECL should be placed. */
14430 cxx_comdat_group (tree decl
)
14434 /* Virtual tables, construction virtual tables, and virtual table
14435 tables all go in a single COMDAT group, named after the primary
14437 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14438 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14439 /* For all other DECLs, the COMDAT group is the mangled name of the
14440 declaration itself. */
14443 while (DECL_THUNK_P (decl
))
14445 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14446 into the same section as the target function. In that case
14447 we must return target's name. */
14448 tree target
= THUNK_TARGET (decl
);
14449 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14450 && DECL_SECTION_NAME (target
) != NULL
14451 && DECL_ONE_ONLY (target
))
14456 name
= DECL_ASSEMBLER_NAME (decl
);
14462 /* Returns the return type for FN as written by the user, which may include
14463 a placeholder for a deduced return type. */
14466 fndecl_declared_return_type (tree fn
)
14468 fn
= STRIP_TEMPLATE (fn
);
14469 if (FNDECL_USED_AUTO (fn
))
14471 struct language_function
*f
= NULL
;
14472 if (DECL_STRUCT_FUNCTION (fn
))
14473 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14475 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14476 return f
->x_auto_return_pattern
;
14478 return TREE_TYPE (TREE_TYPE (fn
));
14481 /* Returns true iff DECL was declared with an auto return type and it has
14482 not yet been deduced to a real type. */
14485 undeduced_auto_decl (tree decl
)
14487 if (cxx_dialect
< cxx1y
)
14489 return type_uses_auto (TREE_TYPE (decl
));
14492 /* Complain if DECL has an undeduced return type. */
14495 require_deduced_type (tree decl
)
14497 if (undeduced_auto_decl (decl
))
14498 error ("use of %qD before deduction of %<auto%>", decl
);
14501 #include "gt-cp-decl.h"