1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2015 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 "double-int.h"
43 #include "tree-hasher.h"
44 #include "stringpool.h"
45 #include "stor-layout.h"
51 #include "tree-iterator.h"
52 #include "tree-inline.h"
59 #include "c-family/c-common.h"
60 #include "c-family/c-objc.h"
61 #include "c-family/c-pragma.h"
62 #include "c-family/c-target.h"
63 #include "c-family/c-ubsan.h"
64 #include "diagnostic.h"
68 #include "splay-tree.h"
72 #include "plugin-api.h"
73 #include "hard-reg-set.h"
82 /* Possible cases of bad specifiers type used by bad_specifiers. */
84 BSP_VAR
, /* variable */
85 BSP_PARM
, /* parameter */
90 static tree
grokparms (tree parmlist
, tree
*);
91 static const char *redeclaration_error_message (tree
, tree
);
93 static int decl_jump_unsafe (tree
);
94 static void require_complete_types_for_parms (tree
);
95 static int ambi_op_p (enum tree_code
);
96 static int unary_op_p (enum tree_code
);
97 static void push_local_name (tree
);
98 static tree
grok_reference_init (tree
, tree
, tree
, int);
99 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
100 int, int, int, tree
);
101 static int check_static_variable_definition (tree
, tree
);
102 static void record_unknown_type (tree
, const char *);
103 static tree
builtin_function_1 (tree
, tree
, bool);
104 static int member_function_or_else (tree
, tree
, enum overload_flags
);
105 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
107 static void check_for_uninitialized_const_var (tree
);
108 static tree
local_variable_p_walkfn (tree
*, int *, void *);
109 static tree
record_builtin_java_type (const char *, int);
110 static const char *tag_name (enum tag_types
);
111 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
112 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
113 static void maybe_deduce_size_from_array_init (tree
, tree
);
114 static void layout_var_decl (tree
);
115 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
116 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
117 static void save_function_data (tree
);
118 static void copy_type_enum (tree
, tree
);
119 static void check_function_type (tree
, tree
);
120 static void finish_constructor_body (void);
121 static void begin_destructor_body (void);
122 static void finish_destructor_body (void);
123 static void record_key_method_defined (tree
);
124 static tree
create_array_type_for_decl (tree
, tree
, tree
);
125 static tree
get_atexit_node (void);
126 static tree
get_dso_handle_node (void);
127 static tree
start_cleanup_fn (void);
128 static void end_cleanup_fn (void);
129 static tree
cp_make_fname_decl (location_t
, tree
, int);
130 static void initialize_predefined_identifiers (void);
131 static tree check_special_function_return_type
132 (special_function_kind
, tree
, tree
);
133 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
134 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
135 static void store_parm_decls (tree
);
136 static void initialize_local_var (tree
, tree
);
137 static void expand_static_init (tree
, tree
);
139 /* The following symbols are subsumed in the cp_global_trees array, and
140 listed here individually for documentation purposes.
143 tree wchar_decl_node;
145 tree vtable_entry_type;
146 tree delta_type_node;
147 tree __t_desc_type_node;
149 tree class_type_node;
150 tree unknown_type_node;
152 Array type `vtable_entry_type[]'
155 tree vtbl_ptr_type_node;
162 A FUNCTION_DECL which can call `abort'. Not necessarily the
163 one that the user will declare, but sufficient to be called
164 by routines that want to abort the program.
169 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
170 tree tinfo_var_id; */
172 tree cp_global_trees
[CPTI_MAX
];
174 /* Indicates that there is a type value in some namespace, although
175 that is not necessarily in scope at the moment. */
177 tree global_type_node
;
179 /* The node that holds the "name" of the global scope. */
180 tree global_scope_name
;
182 #define local_names cp_function_chain->x_local_names
184 /* A list of objects which have constructors or destructors
185 which reside in the global scope. The decl is stored in
186 the TREE_VALUE slot and the initializer is stored
187 in the TREE_PURPOSE slot. */
188 tree static_aggregates
;
190 /* Like static_aggregates, but for thread_local variables. */
195 /* A node for the integer constant 2. */
197 tree integer_two_node
;
199 /* Used only for jumps to as-yet undefined labels, since jumps to
200 defined labels can have their validity checked immediately. */
202 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
203 struct named_label_use_entry
*next
;
204 /* The binding level to which this entry is *currently* attached.
205 This is initially the binding level in which the goto appeared,
206 but is modified as scopes are closed. */
207 cp_binding_level
*binding_level
;
208 /* The head of the names list that was current when the goto appeared,
209 or the inner scope popped. These are the decls that will *not* be
210 skipped when jumping to the label. */
212 /* The location of the goto, for error reporting. */
213 location_t o_goto_locus
;
214 /* True if an OpenMP structured block scope has been closed since
215 the goto appeared. This means that the branch from the label will
216 illegally exit an OpenMP scope. */
220 /* A list of all LABEL_DECLs in the function that have names. Here so
221 we can clear out their names' definitions at the end of the
222 function, and so we can check the validity of jumps to these labels. */
224 struct GTY((for_user
)) named_label_entry
{
225 /* The decl itself. */
228 /* The binding level to which the label is *currently* attached.
229 This is initially set to the binding level in which the label
230 is defined, but is modified as scopes are closed. */
231 cp_binding_level
*binding_level
;
232 /* The head of the names list that was current when the label was
233 defined, or the inner scope popped. These are the decls that will
234 be skipped when jumping to the label. */
236 /* A vector of all decls from all binding levels that would be
237 crossed by a backward branch to the label. */
238 vec
<tree
, va_gc
> *bad_decls
;
240 /* A list of uses of the label, before the label is defined. */
241 struct named_label_use_entry
*uses
;
243 /* The following bits are set after the label is defined, and are
244 updated as scopes are popped. They indicate that a backward jump
245 to the label will illegally enter a scope of the given flavor. */
251 #define named_labels cp_function_chain->x_named_labels
253 /* The number of function bodies which we are currently processing.
254 (Zero if we are at namespace scope, one inside the body of a
255 function, two inside the body of a function in a local class, etc.) */
258 /* To avoid unwanted recursion, finish_function defers all mark_used calls
259 encountered during its execution until it finishes. */
260 bool defer_mark_used_calls
;
261 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
263 /* States indicating how grokdeclarator() should handle declspecs marked
264 with __attribute__((deprecated)). An object declared as
265 __attribute__((deprecated)) suppresses warnings of uses of other
267 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
270 /* A list of VAR_DECLs whose type was incomplete at the time the
271 variable was declared. */
273 typedef struct GTY(()) incomplete_var_d
{
275 tree incomplete_type
;
279 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
281 /* Returns the kind of template specialization we are currently
282 processing, given that it's declaration contained N_CLASS_SCOPES
283 explicit scope qualifications. */
286 current_tmpl_spec_kind (int n_class_scopes
)
288 int n_template_parm_scopes
= 0;
289 int seen_specialization_p
= 0;
290 int innermost_specialization_p
= 0;
293 /* Scan through the template parameter scopes. */
294 for (b
= current_binding_level
;
295 b
->kind
== sk_template_parms
;
298 /* If we see a specialization scope inside a parameter scope,
299 then something is wrong. That corresponds to a declaration
302 template <class T> template <> ...
304 which is always invalid since [temp.expl.spec] forbids the
305 specialization of a class member template if the enclosing
306 class templates are not explicitly specialized as well. */
307 if (b
->explicit_spec_p
)
309 if (n_template_parm_scopes
== 0)
310 innermost_specialization_p
= 1;
312 seen_specialization_p
= 1;
314 else if (seen_specialization_p
== 1)
315 return tsk_invalid_member_spec
;
317 ++n_template_parm_scopes
;
320 /* Handle explicit instantiations. */
321 if (processing_explicit_instantiation
)
323 if (n_template_parm_scopes
!= 0)
324 /* We've seen a template parameter list during an explicit
325 instantiation. For example:
327 template <class T> template void f(int);
329 This is erroneous. */
330 return tsk_invalid_expl_inst
;
332 return tsk_expl_inst
;
335 if (n_template_parm_scopes
< n_class_scopes
)
336 /* We've not seen enough template headers to match all the
337 specialized classes present. For example:
339 template <class T> void R<T>::S<T>::f(int);
341 This is invalid; there needs to be one set of template
342 parameters for each class. */
343 return tsk_insufficient_parms
;
344 else if (n_template_parm_scopes
== n_class_scopes
)
345 /* We're processing a non-template declaration (even though it may
346 be a member of a template class.) For example:
348 template <class T> void S<T>::f(int);
350 The `class T' matches the `S<T>', leaving no template headers
351 corresponding to the `f'. */
353 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
354 /* We've got too many template headers. For example:
356 template <> template <class T> void f (T);
358 There need to be more enclosing classes. */
359 return tsk_excessive_parms
;
361 /* This must be a template. It's of the form:
363 template <class T> template <class U> void S<T>::f(U);
365 This is a specialization if the innermost level was a
366 specialization; otherwise it's just a definition of the
368 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
371 /* Exit the current scope. */
379 /* When a label goes out of scope, check to see if that label was used
380 in a valid manner, and issue any appropriate warnings or errors. */
383 pop_label (tree label
, tree old_value
)
385 if (!processing_template_decl
)
387 if (DECL_INITIAL (label
) == NULL_TREE
)
391 error ("label %q+D used but not defined", label
);
392 location
= input_location
;
393 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
394 /* Avoid crashing later. */
395 define_label (location
, DECL_NAME (label
));
398 warn_for_unused_label (label
);
401 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
404 /* At the end of a function, all labels declared within the function
405 go out of scope. BLOCK is the top-level block for the
409 pop_labels_1 (named_label_entry
**slot
, tree block
)
411 struct named_label_entry
*ent
= *slot
;
413 pop_label (ent
->label_decl
, NULL_TREE
);
415 /* Put the labels into the "variables" of the top-level block,
416 so debugger can see them. */
417 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
418 BLOCK_VARS (block
) = ent
->label_decl
;
420 named_labels
->clear_slot (slot
);
426 pop_labels (tree block
)
430 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
435 /* At the end of a block with local labels, restore the outer definition. */
438 pop_local_label (tree label
, tree old_value
)
440 struct named_label_entry dummy
;
442 pop_label (label
, old_value
);
444 dummy
.label_decl
= label
;
445 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
446 named_labels
->clear_slot (slot
);
449 /* The following two routines are used to interface to Objective-C++.
450 The binding level is purposely treated as an opaque type. */
453 objc_get_current_scope (void)
455 return current_binding_level
;
458 /* The following routine is used by the NeXT-style SJLJ exceptions;
459 variables get marked 'volatile' so as to not be clobbered by
460 _setjmp()/_longjmp() calls. All variables in the current scope,
461 as well as parent scopes up to (but not including) ENCLOSING_BLK
462 shall be thusly marked. */
465 objc_mark_locals_volatile (void *enclosing_blk
)
467 cp_binding_level
*scope
;
469 for (scope
= current_binding_level
;
470 scope
&& scope
!= enclosing_blk
;
471 scope
= scope
->level_chain
)
475 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
476 objc_volatilize_decl (decl
);
478 /* Do not climb up past the current function. */
479 if (scope
->kind
== sk_function_parms
)
484 /* Update data for defined and undefined labels when leaving a scope. */
487 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
489 named_label_entry
*ent
= *slot
;
490 cp_binding_level
*obl
= bl
->level_chain
;
492 if (ent
->binding_level
== bl
)
496 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
497 TREE_LISTs representing OVERLOADs, so be careful. */
498 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
500 : TREE_CHAIN (decl
)))
501 if (decl_jump_unsafe (decl
))
502 vec_safe_push (ent
->bad_decls
, decl
);
504 ent
->binding_level
= obl
;
505 ent
->names_in_scope
= obl
->names
;
509 ent
->in_try_scope
= true;
512 ent
->in_catch_scope
= true;
515 ent
->in_omp_scope
= true;
523 struct named_label_use_entry
*use
;
525 for (use
= ent
->uses
; use
; use
= use
->next
)
526 if (use
->binding_level
== bl
)
528 use
->binding_level
= obl
;
529 use
->names_in_scope
= obl
->names
;
530 if (bl
->kind
== sk_omp
)
531 use
->in_omp_scope
= true;
538 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
539 when errors were reported, except for -Werror-unused-but-set-*. */
540 static int unused_but_set_errorcount
;
542 /* Exit a binding level.
543 Pop the level off, and restore the state of the identifier-decl mappings
544 that were in effect when this level was entered.
546 If KEEP == 1, this level had explicit declarations, so
547 and create a "block" (a BLOCK node) for the level
548 to record its declarations and subblocks for symbol table output.
550 If FUNCTIONBODY is nonzero, this level is the body of a function,
551 so create a block as if KEEP were set and also clear out all
554 If REVERSE is nonzero, reverse the order of decls before putting
555 them into the BLOCK. */
558 poplevel (int keep
, int reverse
, int functionbody
)
561 /* The chain of decls was accumulated in reverse order.
562 Put it into forward order, just for cleanliness. */
567 int leaving_for_scope
;
570 cp_label_binding
*label_bind
;
572 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
577 gcc_assert (current_binding_level
->kind
!= sk_class
);
579 if (current_binding_level
->kind
== sk_cleanup
)
581 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
583 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
585 /* We used to use KEEP == 2 to indicate that the new block should go
586 at the beginning of the list of blocks at this binding level,
587 rather than the end. This hack is no longer used. */
588 gcc_assert (keep
== 0 || keep
== 1);
590 if (current_binding_level
->keep
)
593 /* Any uses of undefined labels, and any defined labels, now operate
594 under constraints of next binding contour. */
595 if (cfun
&& !functionbody
&& named_labels
)
596 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
597 (current_binding_level
);
599 /* Get the decls in the order they were written.
600 Usually current_binding_level->names is in reverse order.
601 But parameter decls were previously put in forward order. */
604 current_binding_level
->names
605 = decls
= nreverse (current_binding_level
->names
);
607 decls
= current_binding_level
->names
;
609 /* If there were any declarations or structure tags in that level,
610 or if this level is a function body,
611 create a BLOCK to record them for the life of this function. */
613 if (keep
== 1 || functionbody
)
614 block
= make_node (BLOCK
);
615 if (block
!= NULL_TREE
)
617 BLOCK_VARS (block
) = decls
;
618 BLOCK_SUBBLOCKS (block
) = subblocks
;
621 /* In each subblock, record that this is its superior. */
623 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
624 BLOCK_SUPERCONTEXT (link
) = block
;
626 /* We still support the old for-scope rules, whereby the variables
627 in a for-init statement were in scope after the for-statement
628 ended. We only use the new rules if flag_new_for_scope is
631 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
633 /* Before we remove the declarations first check for unused variables. */
634 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
635 && current_binding_level
->kind
!= sk_template_parms
636 && !processing_template_decl
)
637 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
639 /* There are cases where D itself is a TREE_LIST. See in
640 push_local_binding where the list of decls returned by
641 getdecls is built. */
642 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
643 tree type
= TREE_TYPE (decl
);
645 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
646 && ! DECL_IN_SYSTEM_HEADER (decl
)
647 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
648 && type
!= error_mark_node
649 && (!CLASS_TYPE_P (type
)
650 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
651 || lookup_attribute ("warn_unused",
652 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
654 if (! TREE_USED (decl
))
655 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
656 else if (DECL_CONTEXT (decl
) == current_function_decl
657 // For -Wunused-but-set-variable leave references alone.
658 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
659 && errorcount
== unused_but_set_errorcount
)
661 warning (OPT_Wunused_but_set_variable
,
662 "variable %q+D set but not used", decl
);
663 unused_but_set_errorcount
= errorcount
;
668 /* Remove declarations for all the DECLs in this level. */
669 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
671 if (leaving_for_scope
&& VAR_P (link
)
672 /* It's hard to make this ARM compatibility hack play nicely with
673 lambdas, and it really isn't necessary in C++11 mode. */
674 && cxx_dialect
< cxx11
677 tree name
= DECL_NAME (link
);
681 ob
= outer_binding (name
,
682 IDENTIFIER_BINDING (name
),
685 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
687 ns_binding
= NULL_TREE
;
689 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
690 /* We have something like:
695 and we are leaving the `for' scope. There's no reason to
696 keep the binding of the inner `i' in this case. */
697 pop_binding (name
, link
);
698 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
699 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
700 /* Here, we have something like:
708 We must pop the for-scope binding so we know what's a
709 type and what isn't. */
710 pop_binding (name
, link
);
713 /* Mark this VAR_DECL as dead so that we can tell we left it
714 there only for backward compatibility. */
715 DECL_DEAD_FOR_LOCAL (link
) = 1;
717 /* Keep track of what should have happened when we
718 popped the binding. */
721 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
722 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
725 /* Add it to the list of dead variables in the next
726 outermost binding to that we can remove these when we
727 leave that binding. */
729 current_binding_level
->level_chain
->dead_vars_from_for
,
732 /* Although we don't pop the cxx_binding, we do clear
733 its SCOPE since the scope is going away now. */
734 IDENTIFIER_BINDING (name
)->scope
735 = current_binding_level
->level_chain
;
742 /* Remove the binding. */
745 if (TREE_CODE (decl
) == TREE_LIST
)
746 decl
= TREE_VALUE (decl
);
749 if (TREE_CODE (name
) == OVERLOAD
)
750 name
= OVL_FUNCTION (name
);
752 gcc_assert (DECL_P (name
));
753 pop_binding (DECL_NAME (name
), decl
);
757 /* Remove declarations for any `for' variables from inner scopes
758 that we kept around. */
759 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
761 pop_binding (DECL_NAME (decl
), decl
);
763 /* Restore the IDENTIFIER_TYPE_VALUEs. */
764 for (link
= current_binding_level
->type_shadowed
;
765 link
; link
= TREE_CHAIN (link
))
766 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
768 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
769 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
771 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
773 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
774 list if a `using' declaration put them there. The debugging
775 back ends won't understand OVERLOAD, so we remove them here.
776 Because the BLOCK_VARS are (temporarily) shared with
777 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
778 popped all the bindings. */
783 for (d
= &BLOCK_VARS (block
); *d
; )
785 if (TREE_CODE (*d
) == TREE_LIST
)
786 *d
= TREE_CHAIN (*d
);
788 d
= &DECL_CHAIN (*d
);
792 /* If the level being exited is the top level of a function,
793 check over all the labels. */
796 /* Since this is the top level block of a function, the vars are
797 the function's parameters. Don't leave them in the BLOCK
798 because they are found in the FUNCTION_DECL instead. */
799 BLOCK_VARS (block
) = 0;
803 kind
= current_binding_level
->kind
;
804 if (kind
== sk_cleanup
)
808 /* If this is a temporary binding created for a cleanup, then we'll
809 have pushed a statement list level. Pop that, create a new
810 BIND_EXPR for the block, and insert it into the stream. */
811 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
812 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
819 /* The current function is being defined, so its DECL_INITIAL
820 should be error_mark_node. */
821 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
822 DECL_INITIAL (current_function_decl
) = block
;
825 current_binding_level
->blocks
826 = block_chainon (current_binding_level
->blocks
, block
);
828 /* If we did not make a block for the level just exited,
829 any blocks made for inner levels
830 (since they cannot be recorded as subblocks in that level)
831 must be carried forward so they will later become subblocks
832 of something else. */
834 current_binding_level
->blocks
835 = block_chainon (current_binding_level
->blocks
, subblocks
);
837 /* Each and every BLOCK node created here in `poplevel' is important
838 (e.g. for proper debugging information) so if we created one
839 earlier, mark it as "used". */
841 TREE_USED (block
) = 1;
843 /* All temporary bindings created for cleanups are popped silently. */
844 if (kind
== sk_cleanup
)
847 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
851 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
852 itself, calling F for each. The DATA is passed to F as well. */
855 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
858 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
860 result
|= (*f
) (name_space
, data
);
862 for (; current
; current
= DECL_CHAIN (current
))
863 result
|= walk_namespaces_r (current
, f
, data
);
868 /* Walk all the namespaces, calling F for each. The DATA is passed to
872 walk_namespaces (walk_namespaces_fn f
, void* data
)
874 return walk_namespaces_r (global_namespace
, f
, data
);
877 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
878 DATA is non-NULL, this is the last time we will call
879 wrapup_global_declarations for this NAMESPACE. */
882 wrapup_globals_for_namespace (tree name_space
, void* data
)
884 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
885 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
886 tree
*vec
= statics
->address ();
887 int len
= statics
->length ();
888 int last_time
= (data
!= 0);
892 check_global_declarations (vec
, len
);
893 emit_debug_global_declarations (vec
, len
);
897 /* Write out any globals that need to be output. */
898 return wrapup_global_declarations (vec
, len
);
902 /* In C++, you don't have to write `struct S' to refer to `S'; you
903 can just use `S'. We accomplish this by creating a TYPE_DECL as
904 if the user had written `typedef struct S S'. Create and return
905 the TYPE_DECL for TYPE. */
908 create_implicit_typedef (tree name
, tree type
)
912 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
913 DECL_ARTIFICIAL (decl
) = 1;
914 /* There are other implicit type declarations, like the one *within*
915 a class that allows you to write `S::S'. We must distinguish
917 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
918 TYPE_NAME (type
) = decl
;
919 TYPE_STUB_DECL (type
) = decl
;
924 /* Remember a local name for name-mangling purposes. */
927 push_local_name (tree decl
)
932 timevar_start (TV_NAME_LOOKUP
);
934 name
= DECL_NAME (decl
);
936 nelts
= vec_safe_length (local_names
);
937 for (i
= 0; i
< nelts
; i
++)
939 t
= (*local_names
)[i
];
940 if (DECL_NAME (t
) == name
)
942 if (!DECL_LANG_SPECIFIC (decl
))
943 retrofit_lang_decl (decl
);
944 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
945 if (DECL_DISCRIMINATOR_SET_P (t
))
946 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
948 DECL_DISCRIMINATOR (decl
) = 1;
950 (*local_names
)[i
] = decl
;
951 timevar_stop (TV_NAME_LOOKUP
);
956 vec_safe_push (local_names
, decl
);
957 timevar_stop (TV_NAME_LOOKUP
);
960 /* Subroutine of duplicate_decls: return truthvalue of whether
961 or not types of these decls match.
963 For C++, we must compare the parameter list so that `int' can match
964 `int&' in a parameter position, but `int&' is not confused with
968 decls_match (tree newdecl
, tree olddecl
)
972 if (newdecl
== olddecl
)
975 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
976 /* If the two DECLs are not even the same kind of thing, we're not
977 interested in their types. */
980 gcc_assert (DECL_P (newdecl
));
982 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
984 tree f1
= TREE_TYPE (newdecl
);
985 tree f2
= TREE_TYPE (olddecl
);
986 tree p1
= TYPE_ARG_TYPES (f1
);
987 tree p2
= TYPE_ARG_TYPES (f2
);
990 /* Specializations of different templates are different functions
991 even if they have the same type. */
992 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
993 ? DECL_TI_TEMPLATE (newdecl
)
995 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
996 ? DECL_TI_TEMPLATE (olddecl
)
1001 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1002 && ! (DECL_EXTERN_C_P (newdecl
)
1003 && DECL_EXTERN_C_P (olddecl
)))
1006 /* A new declaration doesn't match a built-in one unless it
1007 is also extern "C". */
1008 if (DECL_IS_BUILTIN (olddecl
)
1009 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1012 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1015 /* A declaration with deduced return type should use its pre-deduction
1016 type for declaration matching. */
1017 r2
= fndecl_declared_return_type (olddecl
);
1019 if (same_type_p (TREE_TYPE (f1
), r2
))
1021 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1022 && (DECL_BUILT_IN (olddecl
)
1023 #ifndef NO_IMPLICIT_EXTERN_C
1024 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1025 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1029 types_match
= self_promoting_args_p (p1
);
1030 if (p1
== void_list_node
)
1031 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1033 #ifndef NO_IMPLICIT_EXTERN_C
1034 else if (!prototype_p (f1
)
1035 && (DECL_EXTERN_C_P (olddecl
)
1036 && DECL_IN_SYSTEM_HEADER (olddecl
)
1037 && !DECL_CLASS_SCOPE_P (olddecl
))
1038 && (DECL_EXTERN_C_P (newdecl
)
1039 && DECL_IN_SYSTEM_HEADER (newdecl
)
1040 && !DECL_CLASS_SCOPE_P (newdecl
)))
1042 types_match
= self_promoting_args_p (p2
);
1043 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1049 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1050 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1051 || comp_type_attributes (TREE_TYPE (newdecl
),
1052 TREE_TYPE (olddecl
)) != 0);
1057 /* The decls dont match if they correspond to two different versions
1058 of the same function. Disallow extern "C" functions to be
1059 versions for now. */
1061 && !DECL_EXTERN_C_P (newdecl
)
1062 && !DECL_EXTERN_C_P (olddecl
)
1063 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1065 /* Mark functions as versions if necessary. Modify the mangled decl
1066 name if necessary. */
1067 if (DECL_FUNCTION_VERSIONED (newdecl
)
1068 && DECL_FUNCTION_VERSIONED (olddecl
))
1070 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1072 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1073 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1074 mangle_decl (newdecl
);
1076 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1078 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1079 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1080 mangle_decl (olddecl
);
1082 cgraph_node::record_function_versions (olddecl
, newdecl
);
1086 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1088 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1089 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1092 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1093 DECL_TEMPLATE_PARMS (olddecl
)))
1096 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1097 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1098 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1100 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1101 DECL_TEMPLATE_RESULT (newdecl
));
1105 /* Need to check scope for variable declaration (VAR_DECL).
1106 For typedef (TYPE_DECL), scope is ignored. */
1108 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1110 Two declarations for an object with C language linkage
1111 with the same name (ignoring the namespace that qualify
1112 it) that appear in different namespace scopes refer to
1114 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1117 if (TREE_TYPE (newdecl
) == error_mark_node
)
1118 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1119 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1120 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1121 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1124 types_match
= comptypes (TREE_TYPE (newdecl
),
1125 TREE_TYPE (olddecl
),
1126 COMPARE_REDECLARATION
);
1132 /* If NEWDECL is `static' and an `extern' was seen previously,
1133 warn about it. OLDDECL is the previous declaration.
1135 Note that this does not apply to the C++ case of declaring
1136 a variable `extern const' and then later `const'.
1138 Don't complain about built-in functions, since they are beyond
1139 the user's control. */
1142 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1144 if (TREE_CODE (newdecl
) == TYPE_DECL
1145 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1146 || TREE_CODE (newdecl
) == CONST_DECL
1147 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1150 /* Don't get confused by static member functions; that's a different
1152 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1153 && DECL_STATIC_FUNCTION_P (newdecl
))
1156 /* If the old declaration was `static', or the new one isn't, then
1157 everything is OK. */
1158 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1161 /* It's OK to declare a builtin function as `static'. */
1162 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1163 && DECL_ARTIFICIAL (olddecl
))
1166 if (permerror (input_location
,
1167 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1168 inform (input_location
, "previous declaration of %q+D", olddecl
);
1171 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1172 function templates. If their exception specifications do not
1173 match, issue a diagnostic. */
1176 check_redeclaration_exception_specification (tree new_decl
,
1179 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1180 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1182 /* Two default specs are equivalent, don't force evaluation. */
1183 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1184 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1187 maybe_instantiate_noexcept (new_decl
);
1188 maybe_instantiate_noexcept (old_decl
);
1189 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1190 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1194 If any declaration of a function has an exception-specification,
1195 all declarations, including the definition and an explicit
1196 specialization, of that function shall have an
1197 exception-specification with the same set of type-ids. */
1198 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1199 && ! DECL_IS_BUILTIN (old_decl
)
1201 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1203 error ("declaration of %qF has a different exception specifier",
1205 error ("from previous declaration %q+F", old_decl
);
1209 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1210 Otherwise issue diagnostics. */
1213 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1215 old_decl
= STRIP_TEMPLATE (old_decl
);
1216 new_decl
= STRIP_TEMPLATE (new_decl
);
1217 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1218 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1220 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1221 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1223 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1225 if (DECL_BUILT_IN (old_decl
))
1227 /* Hide a built-in declaration. */
1228 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1229 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1232 /* 7.1.5 [dcl.constexpr]
1233 Note: An explicit specialization can differ from the template
1234 declaration with respect to the constexpr specifier. */
1235 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1236 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1239 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1240 error ("from previous declaration %q+D", old_decl
);
1246 /* DECL is a redeclaration of a function or function template. If
1247 it does have default arguments issue a diagnostic. Note: this
1248 function is used to enforce the requirements in C++11 8.3.6 about
1249 no default arguments in redeclarations. */
1252 check_redeclaration_no_default_args (tree decl
)
1254 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1256 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1257 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1258 if (TREE_PURPOSE (t
))
1260 permerror (input_location
,
1261 "redeclaration of %q#D may not have default "
1267 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1268 && lookup_attribute ("gnu_inline", \
1269 DECL_ATTRIBUTES (fn)))
1271 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1272 If the redeclaration is invalid, a diagnostic is issued, and the
1273 error_mark_node is returned. Otherwise, OLDDECL is returned.
1275 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1278 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1281 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1283 unsigned olddecl_uid
= DECL_UID (olddecl
);
1284 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1285 int new_defines_function
= 0;
1286 tree new_template_info
;
1288 if (newdecl
== olddecl
)
1291 types_match
= decls_match (newdecl
, olddecl
);
1293 /* If either the type of the new decl or the type of the old decl is an
1294 error_mark_node, then that implies that we have already issued an
1295 error (earlier) for some bogus type specification, and in that case,
1296 it is rather pointless to harass the user with yet more error message
1297 about the same declaration, so just pretend the types match here. */
1298 if (TREE_TYPE (newdecl
) == error_mark_node
1299 || TREE_TYPE (olddecl
) == error_mark_node
)
1300 return error_mark_node
;
1302 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1303 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1305 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1306 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1307 && check_raw_literal_operator (olddecl
))
1308 error ("literal operator template %q+D conflicts with"
1309 " raw literal operator %qD", newdecl
, olddecl
);
1310 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1311 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1312 && check_raw_literal_operator (newdecl
))
1313 error ("raw literal operator %q+D conflicts with"
1314 " literal operator template %qD", newdecl
, olddecl
);
1317 if (DECL_P (olddecl
)
1318 && TREE_CODE (newdecl
) == FUNCTION_DECL
1319 && TREE_CODE (olddecl
) == FUNCTION_DECL
1320 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1322 if (DECL_DECLARED_INLINE_P (newdecl
)
1323 && DECL_UNINLINABLE (newdecl
)
1324 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1325 /* Already warned elsewhere. */;
1326 else if (DECL_DECLARED_INLINE_P (olddecl
)
1327 && DECL_UNINLINABLE (olddecl
)
1328 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1329 /* Already warned. */;
1330 else if (DECL_DECLARED_INLINE_P (newdecl
)
1331 && DECL_UNINLINABLE (olddecl
)
1332 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1334 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1336 inform (DECL_SOURCE_LOCATION (olddecl
),
1337 "previous declaration of %qD with attribute noinline",
1340 else if (DECL_DECLARED_INLINE_P (olddecl
)
1341 && DECL_UNINLINABLE (newdecl
)
1342 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1344 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1345 "attribute noinline", newdecl
))
1346 inform (DECL_SOURCE_LOCATION (olddecl
),
1347 "previous declaration of %qD was inline",
1352 /* Check for redeclaration and other discrepancies. */
1353 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1354 && DECL_ARTIFICIAL (olddecl
))
1356 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1357 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1359 /* Avoid warnings redeclaring built-ins which have not been
1360 explicitly declared. */
1361 if (DECL_ANTICIPATED (olddecl
))
1364 /* If you declare a built-in or predefined function name as static,
1365 the old definition is overridden, but optionally warn this was a
1366 bad choice of name. */
1367 if (! TREE_PUBLIC (newdecl
))
1369 warning (OPT_Wshadow
,
1370 DECL_BUILT_IN (olddecl
)
1371 ? G_("shadowing built-in function %q#D")
1372 : G_("shadowing library function %q#D"), olddecl
);
1373 /* Discard the old built-in function. */
1376 /* If the built-in is not ansi, then programs can override
1377 it even globally without an error. */
1378 else if (! DECL_BUILT_IN (olddecl
))
1379 warning (0, "library function %q#D redeclared as non-function %q#D",
1382 error ("declaration of %q#D conflicts with built-in "
1383 "declaration %q#D", newdecl
, olddecl
);
1386 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1388 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1389 error_at (DECL_SOURCE_LOCATION (newdecl
),
1390 "redeclaration of %<pragma omp declare reduction%>");
1391 inform (DECL_SOURCE_LOCATION (olddecl
),
1392 "previous %<pragma omp declare reduction%> declaration");
1393 return error_mark_node
;
1395 else if (!types_match
)
1397 /* Avoid warnings redeclaring built-ins which have not been
1398 explicitly declared. */
1399 if (DECL_ANTICIPATED (olddecl
))
1401 /* Deal with fileptr_type_node. FILE type is not known
1402 at the time we create the builtins. */
1405 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1406 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1408 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1411 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1413 tree t
= TREE_VALUE (t1
);
1416 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1417 == get_identifier ("FILE")
1418 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1420 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1422 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1423 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1424 types_match
= decls_match (newdecl
, olddecl
);
1426 return duplicate_decls (newdecl
, olddecl
,
1428 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1431 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1434 else if ((DECL_EXTERN_C_P (newdecl
)
1435 && DECL_EXTERN_C_P (olddecl
))
1436 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1437 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1439 /* A near match; override the builtin. */
1441 if (TREE_PUBLIC (newdecl
))
1442 warning (0, "new declaration %q#D ambiguates built-in "
1443 "declaration %q#D", newdecl
, olddecl
);
1445 warning (OPT_Wshadow
,
1446 DECL_BUILT_IN (olddecl
)
1447 ? G_("shadowing built-in function %q#D")
1448 : G_("shadowing library function %q#D"), olddecl
);
1451 /* Discard the old built-in function. */
1454 /* Replace the old RTL to avoid problems with inlining. */
1455 COPY_DECL_RTL (newdecl
, olddecl
);
1457 /* Even if the types match, prefer the new declarations type for
1458 built-ins which have not been explicitly declared, for
1459 exception lists, etc... */
1460 else if (DECL_IS_BUILTIN (olddecl
))
1462 tree type
= TREE_TYPE (newdecl
);
1463 tree attribs
= (*targetm
.merge_type_attributes
)
1464 (TREE_TYPE (olddecl
), type
);
1466 type
= cp_build_type_attribute_variant (type
, attribs
);
1467 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1470 /* If a function is explicitly declared "throw ()", propagate that to
1471 the corresponding builtin. */
1472 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1473 && DECL_ANTICIPATED (olddecl
)
1474 && TREE_NOTHROW (newdecl
)
1475 && !TREE_NOTHROW (olddecl
))
1477 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1478 tree tmpdecl
= builtin_decl_explicit (fncode
);
1479 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1480 TREE_NOTHROW (tmpdecl
) = 1;
1483 /* Whether or not the builtin can throw exceptions has no
1484 bearing on this declarator. */
1485 TREE_NOTHROW (olddecl
) = 0;
1487 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1489 /* If a builtin function is redeclared as `static', merge
1490 the declarations, but make the original one static. */
1491 DECL_THIS_STATIC (olddecl
) = 1;
1492 TREE_PUBLIC (olddecl
) = 0;
1494 /* Make the old declaration consistent with the new one so
1495 that all remnants of the builtin-ness of this function
1496 will be banished. */
1497 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1498 COPY_DECL_RTL (newdecl
, olddecl
);
1501 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1503 /* C++ Standard, 3.3, clause 4:
1504 "[Note: a namespace name or a class template name must be unique
1505 in its declarative region (7.3.2, clause 14). ]" */
1506 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1507 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1508 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1509 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1510 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1511 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1513 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1514 && TREE_CODE (newdecl
) != TYPE_DECL
)
1515 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1516 && TREE_CODE (olddecl
) != TYPE_DECL
))
1518 /* We do nothing special here, because C++ does such nasty
1519 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1520 get shadowed, and know that if we need to find a TYPE_DECL
1521 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1522 slot of the identifier. */
1526 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1527 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1528 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1529 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1533 error ("%q#D redeclared as different kind of symbol", newdecl
);
1534 if (TREE_CODE (olddecl
) == TREE_LIST
)
1535 olddecl
= TREE_VALUE (olddecl
);
1536 inform (DECL_SOURCE_LOCATION (olddecl
),
1537 "previous declaration %q#D", olddecl
);
1539 return error_mark_node
;
1541 else if (!types_match
)
1543 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1544 /* These are certainly not duplicate declarations; they're
1545 from different scopes. */
1548 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1550 /* The name of a class template may not be declared to refer to
1551 any other template, class, function, object, namespace, value,
1552 or type in the same scope. */
1553 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1554 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1556 error ("conflicting declaration of template %q#D", newdecl
);
1557 inform (DECL_SOURCE_LOCATION (olddecl
),
1558 "previous declaration %q#D", olddecl
);
1559 return error_mark_node
;
1561 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1562 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1563 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1564 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1565 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1566 DECL_TEMPLATE_PARMS (olddecl
))
1567 /* Template functions can be disambiguated by
1569 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1570 TREE_TYPE (TREE_TYPE (olddecl
))))
1572 error ("ambiguating new declaration %q#D", newdecl
);
1573 inform (DECL_SOURCE_LOCATION (olddecl
),
1574 "old declaration %q#D", olddecl
);
1578 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1580 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1582 error ("conflicting declaration of C function %q#D",
1584 inform (DECL_SOURCE_LOCATION (olddecl
),
1585 "previous declaration %q#D", olddecl
);
1588 /* For function versions, params and types match, but they
1589 are not ambiguous. */
1590 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1591 && !DECL_FUNCTION_VERSIONED (olddecl
))
1592 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1593 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1595 error ("ambiguating new declaration of %q#D", newdecl
);
1596 inform (DECL_SOURCE_LOCATION (olddecl
),
1597 "old declaration %q#D", olddecl
);
1598 return error_mark_node
;
1605 error ("conflicting declaration %q#D", newdecl
);
1606 inform (DECL_SOURCE_LOCATION (olddecl
),
1607 "previous declaration as %q#D", olddecl
);
1608 return error_mark_node
;
1611 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1612 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1613 && (!DECL_TEMPLATE_INFO (newdecl
)
1614 || (DECL_TI_TEMPLATE (newdecl
)
1615 != DECL_TI_TEMPLATE (olddecl
))))
1616 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1617 && (!DECL_TEMPLATE_INFO (olddecl
)
1618 || (DECL_TI_TEMPLATE (olddecl
)
1619 != DECL_TI_TEMPLATE (newdecl
))))))
1620 /* It's OK to have a template specialization and a non-template
1621 with the same type, or to have specializations of two
1622 different templates with the same type. Note that if one is a
1623 specialization, and the other is an instantiation of the same
1624 template, that we do not exit at this point. That situation
1625 can occur if we instantiate a template class, and then
1626 specialize one of its methods. This situation is valid, but
1627 the declarations must be merged in the usual way. */
1629 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1630 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1631 && !DECL_USE_TEMPLATE (newdecl
))
1632 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1633 && !DECL_USE_TEMPLATE (olddecl
))))
1634 /* One of the declarations is a template instantiation, and the
1635 other is not a template at all. That's OK. */
1637 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1639 /* In [namespace.alias] we have:
1641 In a declarative region, a namespace-alias-definition can be
1642 used to redefine a namespace-alias declared in that declarative
1643 region to refer only to the namespace to which it already
1646 Therefore, if we encounter a second alias directive for the same
1647 alias, we can just ignore the second directive. */
1648 if (DECL_NAMESPACE_ALIAS (newdecl
)
1649 && (DECL_NAMESPACE_ALIAS (newdecl
)
1650 == DECL_NAMESPACE_ALIAS (olddecl
)))
1652 /* [namespace.alias]
1654 A namespace-name or namespace-alias shall not be declared as
1655 the name of any other entity in the same declarative region.
1656 A namespace-name defined at global scope shall not be
1657 declared as the name of any other entity in any global scope
1659 error ("conflicting declaration of namespace %qD", newdecl
);
1660 inform (DECL_SOURCE_LOCATION (olddecl
),
1661 "previous declaration of namespace %qD here", olddecl
);
1662 return error_mark_node
;
1666 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1669 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1670 if (DECL_NAME (olddecl
) != NULL_TREE
)
1671 inform (input_location
,
1672 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1673 ? G_("%q+#D previously defined here")
1674 : G_("%q+#D previously declared here"), olddecl
);
1675 return error_mark_node
;
1677 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1678 && DECL_INITIAL (olddecl
) != NULL_TREE
1679 && !prototype_p (TREE_TYPE (olddecl
))
1680 && prototype_p (TREE_TYPE (newdecl
)))
1682 /* Prototype decl follows defn w/o prototype. */
1683 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1684 "prototype specified for %q#D", newdecl
))
1685 inform (DECL_SOURCE_LOCATION (olddecl
),
1686 "previous non-prototype definition here");
1688 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1689 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1692 If two declarations of the same function or object
1693 specify different linkage-specifications ..., the program
1694 is ill-formed.... Except for functions with C++ linkage,
1695 a function declaration without a linkage specification
1696 shall not precede the first linkage specification for
1697 that function. A function can be declared without a
1698 linkage specification after an explicit linkage
1699 specification has been seen; the linkage explicitly
1700 specified in the earlier declaration is not affected by
1701 such a function declaration.
1703 DR 563 raises the question why the restrictions on
1704 functions should not also apply to objects. Older
1705 versions of G++ silently ignore the linkage-specification
1713 which is clearly wrong. Therefore, we now treat objects
1715 if (current_lang_depth () == 0)
1717 /* There is no explicit linkage-specification, so we use
1718 the linkage from the previous declaration. */
1719 if (!DECL_LANG_SPECIFIC (newdecl
))
1720 retrofit_lang_decl (newdecl
);
1721 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1725 error ("conflicting declaration of %q#D with %qL linkage",
1726 newdecl
, DECL_LANGUAGE (newdecl
));
1727 inform (DECL_SOURCE_LOCATION (olddecl
),
1728 "previous declaration with %qL linkage",
1729 DECL_LANGUAGE (olddecl
));
1733 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1735 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1737 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1738 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1739 && (/* grokfndecl passes member function templates too
1740 as FUNCTION_DECLs. */
1741 DECL_TEMPLATE_INFO (olddecl
)
1743 Default arguments for a member function of a class
1744 template shall be specified on the initial declaration
1745 of the member function within the class template. */
1746 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1747 check_redeclaration_no_default_args (newdecl
);
1750 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1751 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1754 for (; t1
&& t1
!= void_list_node
;
1755 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1756 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1758 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1761 if (permerror (input_location
,
1762 "default argument given for parameter "
1763 "%d of %q#D", i
, newdecl
))
1764 inform (DECL_SOURCE_LOCATION (olddecl
),
1765 "previous specification in %q#D here",
1770 error ("default argument given for parameter %d "
1771 "of %q#D", i
, newdecl
);
1772 inform (DECL_SOURCE_LOCATION (olddecl
),
1773 "previous specification in %q#D here",
1781 /* Do not merge an implicit typedef with an explicit one. In:
1785 typedef class A A __attribute__ ((foo));
1787 the attribute should apply only to the typedef. */
1788 if (TREE_CODE (olddecl
) == TYPE_DECL
1789 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1790 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1793 /* If new decl is `static' and an `extern' was seen previously,
1795 warn_extern_redeclared_static (newdecl
, olddecl
);
1797 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1798 return error_mark_node
;
1800 /* We have committed to returning 1 at this point. */
1801 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1803 /* Now that functions must hold information normally held
1804 by field decls, there is extra work to do so that
1805 declaration information does not get destroyed during
1807 if (DECL_VINDEX (olddecl
))
1808 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1809 if (DECL_CONTEXT (olddecl
))
1810 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1811 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1812 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1813 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1814 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1815 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1816 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1817 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1818 SET_OVERLOADED_OPERATOR_CODE
1819 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1820 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1822 /* Optionally warn about more than one declaration for the same
1823 name, but don't warn about a function declaration followed by a
1825 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1826 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1827 /* Don't warn about extern decl followed by definition. */
1828 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1829 /* Don't warn about friends, let add_friend take care of it. */
1830 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1831 /* Don't warn about declaration followed by specialization. */
1832 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1833 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1835 if (warning (OPT_Wredundant_decls
,
1836 "redundant redeclaration of %qD in same scope",
1838 inform (DECL_SOURCE_LOCATION (olddecl
),
1839 "previous declaration of %qD", olddecl
);
1842 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1843 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1845 if (DECL_DELETED_FN (newdecl
))
1847 error ("deleted definition of %qD", newdecl
);
1848 inform (DECL_SOURCE_LOCATION (olddecl
),
1849 "previous declaration of %qD", olddecl
);
1851 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1855 /* Deal with C++: must preserve virtual function table size. */
1856 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1858 tree newtype
= TREE_TYPE (newdecl
);
1859 tree oldtype
= TREE_TYPE (olddecl
);
1861 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1862 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1863 CLASSTYPE_FRIEND_CLASSES (newtype
)
1864 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1866 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1869 /* Copy all the DECL_... slots specified in the new decl
1870 except for any that we copy here from the old type. */
1871 DECL_ATTRIBUTES (newdecl
)
1872 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1874 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1878 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1879 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1880 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1881 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1882 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1883 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1885 DECL_ATTRIBUTES (old_result
)
1886 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1888 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1890 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1891 declarations of a function template. */
1892 check_redeclaration_no_default_args (newdecl
);
1894 check_default_args (newdecl
);
1896 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1897 && DECL_INITIAL (new_result
))
1899 if (DECL_INITIAL (old_result
))
1900 DECL_UNINLINABLE (old_result
) = 1;
1902 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1903 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1904 DECL_NOT_REALLY_EXTERN (old_result
)
1905 = DECL_NOT_REALLY_EXTERN (new_result
);
1906 DECL_INTERFACE_KNOWN (old_result
)
1907 = DECL_INTERFACE_KNOWN (new_result
);
1908 DECL_DECLARED_INLINE_P (old_result
)
1909 = DECL_DECLARED_INLINE_P (new_result
);
1910 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1911 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1916 DECL_DECLARED_INLINE_P (old_result
)
1917 |= DECL_DECLARED_INLINE_P (new_result
);
1918 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1919 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1920 check_redeclaration_exception_specification (newdecl
, olddecl
);
1924 /* If the new declaration is a definition, update the file and
1925 line information on the declaration, and also make
1926 the old declaration the same definition. */
1927 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1929 DECL_SOURCE_LOCATION (olddecl
)
1930 = DECL_SOURCE_LOCATION (old_result
)
1931 = DECL_SOURCE_LOCATION (newdecl
);
1932 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1933 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1936 DECL_ARGUMENTS (old_result
)
1937 = DECL_ARGUMENTS (new_result
);
1938 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1939 parm
= DECL_CHAIN (parm
))
1940 DECL_CONTEXT (parm
) = old_result
;
1949 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1950 check_redeclaration_exception_specification (newdecl
, olddecl
);
1952 /* Automatically handles default parameters. */
1953 tree oldtype
= TREE_TYPE (olddecl
);
1956 /* For typedefs use the old type, as the new type's DECL_NAME points
1957 at newdecl, which will be ggc_freed. */
1958 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1961 /* Merge the data types specified in the two decls. */
1962 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1964 if (VAR_P (newdecl
))
1966 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1967 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1968 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1969 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1970 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1971 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1973 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1974 if (DECL_LANG_SPECIFIC (olddecl
)
1975 && CP_DECL_THREADPRIVATE_P (olddecl
))
1977 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1978 if (!DECL_LANG_SPECIFIC (newdecl
))
1979 retrofit_lang_decl (newdecl
);
1981 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1985 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1987 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1988 check_default_args (newdecl
);
1990 /* Lay the type out, unless already done. */
1991 if (! same_type_p (newtype
, oldtype
)
1992 && TREE_TYPE (newdecl
) != error_mark_node
1993 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1994 layout_type (TREE_TYPE (newdecl
));
1996 if ((VAR_P (newdecl
)
1997 || TREE_CODE (newdecl
) == PARM_DECL
1998 || TREE_CODE (newdecl
) == RESULT_DECL
1999 || TREE_CODE (newdecl
) == FIELD_DECL
2000 || TREE_CODE (newdecl
) == TYPE_DECL
)
2001 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2002 layout_decl (newdecl
, 0);
2004 /* Merge the type qualifiers. */
2005 if (TREE_READONLY (newdecl
))
2006 TREE_READONLY (olddecl
) = 1;
2007 if (TREE_THIS_VOLATILE (newdecl
))
2008 TREE_THIS_VOLATILE (olddecl
) = 1;
2009 if (TREE_NOTHROW (newdecl
))
2010 TREE_NOTHROW (olddecl
) = 1;
2012 /* Merge deprecatedness. */
2013 if (TREE_DEPRECATED (newdecl
))
2014 TREE_DEPRECATED (olddecl
) = 1;
2016 /* Preserve function specific target and optimization options */
2017 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2019 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2020 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2021 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2022 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2024 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2025 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2026 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2027 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2030 /* Merge the initialization information. */
2031 if (DECL_INITIAL (newdecl
) == NULL_TREE
2032 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2034 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2035 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2036 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2038 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2039 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2043 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2045 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2046 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2047 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2048 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2049 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2050 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2051 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2052 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2053 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2054 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2055 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2056 /* Keep the old RTL. */
2057 COPY_DECL_RTL (olddecl
, newdecl
);
2059 else if (VAR_P (newdecl
)
2060 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2062 /* Keep the old RTL. We cannot keep the old RTL if the old
2063 declaration was for an incomplete object and the new
2064 declaration is not since many attributes of the RTL will
2066 COPY_DECL_RTL (olddecl
, newdecl
);
2069 /* If cannot merge, then use the new type and qualifiers,
2070 and don't preserve the old rtl. */
2073 /* Clean out any memory we had of the old declaration. */
2074 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2076 TREE_VALUE (oldstatic
) = error_mark_node
;
2078 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2079 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2080 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2081 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2084 /* Merge the storage class information. */
2085 merge_weak (newdecl
, olddecl
);
2087 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2088 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2089 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2090 if (! DECL_EXTERNAL (olddecl
))
2091 DECL_EXTERNAL (newdecl
) = 0;
2093 new_template_info
= NULL_TREE
;
2094 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2096 bool new_redefines_gnu_inline
= false;
2098 if (new_defines_function
2099 && ((DECL_INTERFACE_KNOWN (olddecl
)
2100 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2101 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2102 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2103 == FUNCTION_DECL
))))
2107 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2108 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2110 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2113 if (!new_redefines_gnu_inline
)
2115 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2116 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2117 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2119 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2120 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2121 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2123 /* If the OLDDECL is an instantiation and/or specialization,
2124 then the NEWDECL must be too. But, it may not yet be marked
2125 as such if the caller has created NEWDECL, but has not yet
2126 figured out that it is a redeclaration. */
2127 if (!DECL_USE_TEMPLATE (newdecl
))
2128 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2130 /* Don't really know how much of the language-specific
2131 values we should copy from old to new. */
2132 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2133 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2134 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2135 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2137 if (LANG_DECL_HAS_MIN (newdecl
))
2139 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2140 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2141 if (DECL_TEMPLATE_INFO (newdecl
))
2143 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2144 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2145 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2146 /* Remember the presence of explicit specialization args. */
2147 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2148 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2150 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2152 /* Only functions have these fields. */
2153 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2155 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2156 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2157 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2158 && DECL_HIDDEN_FRIEND_P (olddecl
)
2159 && newdecl_is_friend
);
2160 DECL_BEFRIENDING_CLASSES (newdecl
)
2161 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2162 DECL_BEFRIENDING_CLASSES (olddecl
));
2163 /* DECL_THUNKS is only valid for virtual functions,
2164 otherwise it is a DECL_FRIEND_CONTEXT. */
2165 if (DECL_VIRTUAL_P (newdecl
))
2166 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2168 /* Only variables have this field. */
2169 else if (VAR_P (newdecl
)
2170 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2171 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2174 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2178 /* Merge parameter attributes. */
2179 tree oldarg
, newarg
;
2180 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2181 newarg
= DECL_ARGUMENTS(newdecl
);
2183 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2184 DECL_ATTRIBUTES (newarg
)
2185 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2186 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2189 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2190 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2192 /* If newdecl is not a specialization, then it is not a
2193 template-related function at all. And that means that we
2194 should have exited above, returning 0. */
2195 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2197 if (DECL_ODR_USED (olddecl
))
2198 /* From [temp.expl.spec]:
2200 If a template, a member template or the member of a class
2201 template is explicitly specialized then that
2202 specialization shall be declared before the first use of
2203 that specialization that would cause an implicit
2204 instantiation to take place, in every translation unit in
2205 which such a use occurs. */
2206 error ("explicit specialization of %qD after first use",
2209 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2210 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2211 && DECL_DECLARED_INLINE_P (newdecl
));
2213 /* Don't propagate visibility from the template to the
2214 specialization here. We'll do that in determine_visibility if
2216 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2218 /* [temp.expl.spec/14] We don't inline explicit specialization
2219 just because the primary template says so. */
2221 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2222 the always_inline attribute. */
2223 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2224 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2226 if (DECL_DECLARED_INLINE_P (newdecl
))
2227 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2229 DECL_ATTRIBUTES (newdecl
)
2230 = remove_attribute ("always_inline",
2231 DECL_ATTRIBUTES (newdecl
));
2234 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2236 /* Never inline re-defined extern inline functions.
2237 FIXME: this could be better handled by keeping both
2238 function as separate declarations. */
2239 DECL_UNINLINABLE (newdecl
) = 1;
2243 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2244 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2246 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2248 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2249 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2251 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2252 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2253 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2254 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2257 /* Preserve abstractness on cloned [cd]tors. */
2258 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2260 /* Update newdecl's parms to point at olddecl. */
2261 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2262 parm
= DECL_CHAIN (parm
))
2263 DECL_CONTEXT (parm
) = olddecl
;
2267 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2268 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2269 COPY_DECL_RTL (newdecl
, olddecl
);
2271 if (! types_match
|| new_defines_function
)
2273 /* These need to be copied so that the names are available.
2274 Note that if the types do match, we'll preserve inline
2275 info and other bits, but if not, we won't. */
2276 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2277 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2279 /* If redeclaring a builtin function, it stays built in
2280 if newdecl is a gnu_inline definition, or if newdecl is just
2282 if (DECL_BUILT_IN (olddecl
)
2283 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2285 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2286 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2287 /* If we're keeping the built-in definition, keep the rtl,
2288 regardless of declaration matches. */
2289 COPY_DECL_RTL (olddecl
, newdecl
);
2290 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2292 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2295 /* If a compatible prototype of these builtin functions
2296 is seen, assume the runtime implements it with the
2297 expected semantics. */
2298 case BUILT_IN_STPCPY
:
2299 if (builtin_decl_explicit_p (fncode
))
2300 set_builtin_decl_implicit_p (fncode
, true);
2307 if (new_defines_function
)
2308 /* If defining a function declared with other language
2309 linkage, use the previously declared language linkage. */
2310 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2311 else if (types_match
)
2313 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2314 /* Don't clear out the arguments if we're just redeclaring a
2316 if (DECL_ARGUMENTS (olddecl
))
2317 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2320 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2321 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2323 /* Now preserve various other info from the definition. */
2324 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2325 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2326 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2327 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2329 /* Warn about conflicting visibility specifications. */
2330 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2331 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2332 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2334 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2335 "%qD: visibility attribute ignored because it "
2336 "conflicts with previous declaration", newdecl
))
2337 inform (DECL_SOURCE_LOCATION (olddecl
),
2338 "previous declaration of %qD", olddecl
);
2340 /* Choose the declaration which specified visibility. */
2341 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2343 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2344 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2346 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2347 so keep this behavior. */
2348 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2350 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2351 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2353 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2354 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2356 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2357 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2359 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2360 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2361 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2363 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2364 with that from NEWDECL below. */
2365 if (DECL_LANG_SPECIFIC (olddecl
))
2367 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2368 != DECL_LANG_SPECIFIC (newdecl
));
2369 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2372 /* Merge the USED information. */
2373 if (TREE_USED (olddecl
))
2374 TREE_USED (newdecl
) = 1;
2375 else if (TREE_USED (newdecl
))
2376 TREE_USED (olddecl
) = 1;
2377 if (VAR_P (newdecl
))
2379 if (DECL_READ_P (olddecl
))
2380 DECL_READ_P (newdecl
) = 1;
2381 else if (DECL_READ_P (newdecl
))
2382 DECL_READ_P (olddecl
) = 1;
2384 if (DECL_PRESERVE_P (olddecl
))
2385 DECL_PRESERVE_P (newdecl
) = 1;
2386 else if (DECL_PRESERVE_P (newdecl
))
2387 DECL_PRESERVE_P (olddecl
) = 1;
2389 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2390 to olddecl and deleted. */
2391 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2392 && DECL_FUNCTION_VERSIONED (olddecl
))
2394 /* Set the flag for newdecl so that it gets copied to olddecl. */
2395 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2396 /* newdecl will be purged after copying to olddecl and is no longer
2398 cgraph_node::delete_function_version (newdecl
);
2401 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2404 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2406 function_size
= sizeof (struct tree_decl_common
);
2408 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2409 (char *) newdecl
+ sizeof (struct tree_common
),
2410 function_size
- sizeof (struct tree_common
));
2412 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2413 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2414 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2416 /* Preserve symtab node mapping. */
2417 olddecl
->decl_with_vis
.symtab_node
= snode
;
2419 if (new_template_info
)
2420 /* If newdecl is a template instantiation, it is possible that
2421 the following sequence of events has occurred:
2423 o A friend function was declared in a class template. The
2424 class template was instantiated.
2426 o The instantiation of the friend declaration was
2427 recorded on the instantiation list, and is newdecl.
2429 o Later, however, instantiate_class_template called pushdecl
2430 on the newdecl to perform name injection. But, pushdecl in
2431 turn called duplicate_decls when it discovered that another
2432 declaration of a global function with the same name already
2435 o Here, in duplicate_decls, we decided to clobber newdecl.
2437 If we're going to do that, we'd better make sure that
2438 olddecl, and not newdecl, is on the list of
2439 instantiations so that if we try to do the instantiation
2440 again we won't get the clobbered declaration. */
2441 reregister_specialization (newdecl
,
2447 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2449 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2450 (char *) newdecl
+ sizeof (struct tree_common
),
2451 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2452 switch (TREE_CODE (newdecl
))
2462 struct symtab_node
*snode
= NULL
;
2464 if (TREE_CODE (newdecl
) == VAR_DECL
2465 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2466 snode
= symtab_node::get (olddecl
);
2467 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2468 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2469 size
- sizeof (struct tree_decl_common
)
2470 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2471 if (TREE_CODE (newdecl
) == VAR_DECL
)
2472 olddecl
->decl_with_vis
.symtab_node
= snode
;
2476 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2477 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2478 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2479 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2484 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2485 || TREE_CODE (newdecl
) == VAR_DECL
)
2487 if (DECL_EXTERNAL (olddecl
)
2488 || TREE_PUBLIC (olddecl
)
2489 || TREE_STATIC (olddecl
))
2491 /* Merge the section attribute.
2492 We want to issue an error if the sections conflict but that must be
2493 done later in decl_attributes since we are called before attributes
2495 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2496 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2498 if (DECL_ONE_ONLY (newdecl
))
2500 struct symtab_node
*oldsym
, *newsym
;
2501 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2502 oldsym
= cgraph_node::get_create (olddecl
);
2504 oldsym
= varpool_node::get_create (olddecl
);
2505 newsym
= symtab_node::get (newdecl
);
2506 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2510 if (TREE_CODE (newdecl
) == VAR_DECL
2511 && DECL_THREAD_LOCAL_P (newdecl
))
2512 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2515 DECL_UID (olddecl
) = olddecl_uid
;
2517 DECL_FRIEND_P (olddecl
) = 1;
2520 DECL_ANTICIPATED (olddecl
) = 1;
2521 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2524 /* NEWDECL contains the merged attribute lists.
2525 Update OLDDECL to be the same. */
2526 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2528 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2529 so that encode_section_info has a chance to look at the new decl
2530 flags and attributes. */
2531 if (DECL_RTL_SET_P (olddecl
)
2532 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2534 && TREE_STATIC (olddecl
))))
2535 make_decl_rtl (olddecl
);
2537 /* The NEWDECL will no longer be needed. Because every out-of-class
2538 declaration of a member results in a call to duplicate_decls,
2539 freeing these nodes represents in a significant savings.
2541 Before releasing the node, be sore to remove function from symbol
2542 table that might have been inserted there to record comdat group.
2543 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2544 structure is shared in between newdecl and oldecl. */
2545 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2546 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2547 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2548 || TREE_CODE (newdecl
) == VAR_DECL
)
2550 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2559 /* Return zero if the declaration NEWDECL is valid
2560 when the declaration OLDDECL (assumed to be for the same name)
2561 has already been seen.
2562 Otherwise return an error message format string with a %s
2563 where the identifier should go. */
2566 redeclaration_error_message (tree newdecl
, tree olddecl
)
2568 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2570 /* Because C++ can put things into name space for free,
2571 constructs like "typedef struct foo { ... } foo"
2572 would look like an erroneous redeclaration. */
2573 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2576 return G_("redefinition of %q#D");
2578 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2580 /* If this is a pure function, its olddecl will actually be
2581 the original initialization to `0' (which we force to call
2582 abort()). Don't complain about redefinition in this case. */
2583 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2584 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2587 /* If both functions come from different namespaces, this is not
2588 a redeclaration - this is a conflict with a used function. */
2589 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2590 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2591 && ! decls_match (olddecl
, newdecl
))
2592 return G_("%qD conflicts with used function");
2594 /* We'll complain about linkage mismatches in
2595 warn_extern_redeclared_static. */
2597 /* Defining the same name twice is no good. */
2598 if (DECL_INITIAL (olddecl
) != NULL_TREE
2599 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2601 if (DECL_NAME (olddecl
) == NULL_TREE
)
2602 return G_("%q#D not declared in class");
2603 else if (!GNU_INLINE_P (olddecl
)
2604 || GNU_INLINE_P (newdecl
))
2605 return G_("redefinition of %q#D");
2608 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2610 bool olda
= GNU_INLINE_P (olddecl
);
2611 bool newa
= GNU_INLINE_P (newdecl
);
2616 return G_("%q+D redeclared inline with "
2617 "%<gnu_inline%> attribute");
2619 return G_("%q+D redeclared inline without "
2620 "%<gnu_inline%> attribute");
2624 check_abi_tag_redeclaration
2625 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2626 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2630 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2634 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2636 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2637 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2638 return G_("redefinition of %q#D");
2642 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2643 || (DECL_TEMPLATE_RESULT (newdecl
)
2644 == DECL_TEMPLATE_RESULT (olddecl
)))
2647 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2648 if (DECL_TEMPLATE_INFO (nt
))
2649 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2650 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2651 if (DECL_TEMPLATE_INFO (ot
))
2652 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2653 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2654 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2655 return G_("redefinition of %q#D");
2657 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2659 bool olda
= GNU_INLINE_P (ot
);
2660 bool newa
= GNU_INLINE_P (nt
);
2665 return G_("%q+D redeclared inline with "
2666 "%<gnu_inline%> attribute");
2668 return G_("%q+D redeclared inline without "
2669 "%<gnu_inline%> attribute");
2673 /* Core issue #226 (C++0x):
2675 If a friend function template declaration specifies a
2676 default template-argument, that declaration shall be a
2677 definition and shall be the only declaration of the
2678 function template in the translation unit. */
2679 if ((cxx_dialect
!= cxx98
)
2680 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2681 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2682 /*is_primary=*/true,
2683 /*is_partial=*/false,
2684 /*is_friend_decl=*/2))
2685 return G_("redeclaration of friend %q#D "
2686 "may not have default template arguments");
2690 else if (VAR_P (newdecl
)
2691 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2692 && (! DECL_LANG_SPECIFIC (olddecl
)
2693 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2694 || DECL_THREAD_LOCAL_P (newdecl
)))
2696 /* Only variables can be thread-local, and all declarations must
2697 agree on this property. */
2698 if (DECL_THREAD_LOCAL_P (newdecl
))
2699 return G_("thread-local declaration of %q#D follows "
2700 "non-thread-local declaration");
2702 return G_("non-thread-local declaration of %q#D follows "
2703 "thread-local declaration");
2705 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2707 /* The objects have been declared at namespace scope. If either
2708 is a member of an anonymous union, then this is an invalid
2709 redeclaration. For example:
2715 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2716 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2717 return G_("redeclaration of %q#D");
2718 /* If at least one declaration is a reference, there is no
2719 conflict. For example:
2725 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2727 /* Reject two definitions. */
2728 return G_("redefinition of %q#D");
2732 /* Objects declared with block scope: */
2733 /* Reject two definitions, and reject a definition
2734 together with an external reference. */
2735 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2736 return G_("redeclaration of %q#D");
2741 /* Hash and equality functions for the named_label table. */
2744 named_label_hasher::hash (named_label_entry
*ent
)
2746 return DECL_UID (ent
->label_decl
);
2750 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2752 return a
->label_decl
== b
->label_decl
;
2755 /* Create a new label, named ID. */
2758 make_label_decl (tree id
, int local_p
)
2760 struct named_label_entry
*ent
;
2763 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2765 DECL_CONTEXT (decl
) = current_function_decl
;
2766 DECL_MODE (decl
) = VOIDmode
;
2767 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2769 /* Say where one reference is to the label, for the sake of the
2770 error if it is not defined. */
2771 DECL_SOURCE_LOCATION (decl
) = input_location
;
2773 /* Record the fact that this identifier is bound to this label. */
2774 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2776 /* Create the label htab for the function on demand. */
2778 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2780 /* Record this label on the list of labels used in this function.
2781 We do this before calling make_label_decl so that we get the
2782 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2783 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2784 ent
->label_decl
= decl
;
2786 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2787 gcc_assert (*slot
== NULL
);
2793 /* Look for a label named ID in the current function. If one cannot
2794 be found, create one. (We keep track of used, but undefined,
2795 labels, and complain about them at the end of a function.) */
2798 lookup_label_1 (tree id
)
2802 /* You can't use labels at global scope. */
2803 if (current_function_decl
== NULL_TREE
)
2805 error ("label %qE referenced outside of any function", id
);
2809 /* See if we've already got this label. */
2810 decl
= IDENTIFIER_LABEL_VALUE (id
);
2811 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2814 decl
= make_label_decl (id
, /*local_p=*/0);
2818 /* Wrapper for lookup_label_1. */
2821 lookup_label (tree id
)
2824 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2825 ret
= lookup_label_1 (id
);
2826 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2830 /* Declare a local label named ID. */
2833 declare_local_label (tree id
)
2836 cp_label_binding bind
;
2838 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2839 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2840 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2842 decl
= make_label_decl (id
, /*local_p=*/1);
2844 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2849 /* Returns nonzero if it is ill-formed to jump past the declaration of
2850 DECL. Returns 2 if it's also a real problem. */
2853 decl_jump_unsafe (tree decl
)
2855 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2856 with automatic storage duration is not in scope to a point where it is
2857 in scope is ill-formed unless the variable has scalar type, class type
2858 with a trivial default constructor and a trivial destructor, a
2859 cv-qualified version of one of these types, or an array of one of the
2860 preceding types and is declared without an initializer (8.5). */
2861 tree type
= TREE_TYPE (decl
);
2863 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2864 || type
== error_mark_node
)
2867 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2868 || variably_modified_type_p (type
, NULL_TREE
))
2871 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2877 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2880 identify_goto (tree decl
, const location_t
*locus
)
2882 bool complained
= (decl
2883 ? permerror (input_location
, "jump to label %qD", decl
)
2884 : permerror (input_location
, "jump to case label"));
2885 if (complained
&& locus
)
2886 inform (*locus
, " from here");
2890 /* Check that a single previously seen jump to a newly defined label
2891 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2892 the jump context; NAMES are the names in scope in LEVEL at the jump
2893 context; LOCUS is the source position of the jump or 0. Returns
2894 true if all is well. */
2897 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2898 bool exited_omp
, const location_t
*locus
)
2900 cp_binding_level
*b
;
2901 bool identified
= false, complained
= false;
2902 bool saw_eh
= false, saw_omp
= false;
2906 complained
= identify_goto (decl
, locus
);
2908 inform (input_location
, " exits OpenMP structured block");
2909 identified
= saw_omp
= true;
2912 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2914 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2916 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2917 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2918 : TREE_CHAIN (new_decls
)))
2920 int problem
= decl_jump_unsafe (new_decls
);
2926 complained
= identify_goto (decl
, locus
);
2932 inform (input_location
,
2933 " crosses initialization of %q+#D", new_decls
);
2935 inform (input_location
, " enters scope of %q+#D which has "
2936 "non-trivial destructor", new_decls
);
2942 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2946 complained
= identify_goto (decl
, locus
);
2951 if (b
->kind
== sk_try
)
2952 inform (input_location
, " enters try block");
2954 inform (input_location
, " enters catch block");
2958 if (b
->kind
== sk_omp
&& !saw_omp
)
2962 complained
= identify_goto (decl
, locus
);
2966 inform (input_location
, " enters OpenMP structured block");
2975 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2977 check_previous_goto_1 (decl
, use
->binding_level
,
2978 use
->names_in_scope
, use
->in_omp_scope
,
2979 &use
->o_goto_locus
);
2983 check_switch_goto (cp_binding_level
* level
)
2985 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2988 /* Check that a new jump to a label DECL is OK. Called by
2989 finish_goto_stmt. */
2992 check_goto (tree decl
)
2994 struct named_label_entry
*ent
, dummy
;
2995 bool saw_catch
= false, identified
= false, complained
= false;
2999 /* We can't know where a computed goto is jumping.
3000 So we assume that it's OK. */
3001 if (TREE_CODE (decl
) != LABEL_DECL
)
3004 /* We didn't record any information about this label when we created it,
3005 and there's not much point since it's trivial to analyze as a return. */
3006 if (decl
== cdtor_label
)
3009 dummy
.label_decl
= decl
;
3010 ent
= named_labels
->find (&dummy
);
3011 gcc_assert (ent
!= NULL
);
3013 /* If the label hasn't been defined yet, defer checking. */
3014 if (! DECL_INITIAL (decl
))
3016 struct named_label_use_entry
*new_use
;
3018 /* Don't bother creating another use if the last goto had the
3019 same data, and will therefore create the same set of errors. */
3021 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3024 new_use
= ggc_alloc
<named_label_use_entry
> ();
3025 new_use
->binding_level
= current_binding_level
;
3026 new_use
->names_in_scope
= current_binding_level
->names
;
3027 new_use
->o_goto_locus
= input_location
;
3028 new_use
->in_omp_scope
= false;
3030 new_use
->next
= ent
->uses
;
3031 ent
->uses
= new_use
;
3035 if (ent
->in_try_scope
|| ent
->in_catch_scope
3036 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3038 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3040 inform (input_location
, " from here");
3044 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3046 int u
= decl_jump_unsafe (bad
);
3048 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3050 /* Can't skip init of __exception_info. */
3052 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3055 else if (complained
)
3058 inform (input_location
, " skips initialization of %q+#D", bad
);
3060 inform (input_location
, " enters scope of %q+#D which has "
3061 "non-trivial destructor", bad
);
3067 if (ent
->in_try_scope
)
3068 inform (input_location
, " enters try block");
3069 else if (ent
->in_catch_scope
&& !saw_catch
)
3070 inform (input_location
, " enters catch block");
3073 if (ent
->in_omp_scope
)
3076 inform (input_location
, " enters OpenMP structured block");
3078 else if (flag_openmp
)
3080 cp_binding_level
*b
;
3081 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3083 if (b
== ent
->binding_level
)
3085 if (b
->kind
== sk_omp
)
3089 complained
= permerror (input_location
,
3090 "jump to label %q+D", decl
);
3092 inform (input_location
, " from here");
3096 inform (input_location
, " exits OpenMP structured block");
3103 /* Check that a return is ok wrt OpenMP structured blocks.
3104 Called by finish_return_stmt. Returns true if all is well. */
3107 check_omp_return (void)
3109 cp_binding_level
*b
;
3110 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3111 if (b
->kind
== sk_omp
)
3113 error ("invalid exit from OpenMP structured block");
3116 else if (b
->kind
== sk_function_parms
)
3121 /* Define a label, specifying the location in the source file.
3122 Return the LABEL_DECL node for the label. */
3125 define_label_1 (location_t location
, tree name
)
3127 struct named_label_entry
*ent
, dummy
;
3128 cp_binding_level
*p
;
3131 decl
= lookup_label (name
);
3133 dummy
.label_decl
= decl
;
3134 ent
= named_labels
->find (&dummy
);
3135 gcc_assert (ent
!= NULL
);
3137 /* After labels, make any new cleanups in the function go into their
3138 own new (temporary) binding contour. */
3139 for (p
= current_binding_level
;
3140 p
->kind
!= sk_function_parms
;
3142 p
->more_cleanups_ok
= 0;
3144 if (name
== get_identifier ("wchar_t"))
3145 permerror (input_location
, "label named wchar_t");
3147 if (DECL_INITIAL (decl
) != NULL_TREE
)
3149 error ("duplicate label %qD", decl
);
3150 return error_mark_node
;
3154 struct named_label_use_entry
*use
;
3156 /* Mark label as having been defined. */
3157 DECL_INITIAL (decl
) = error_mark_node
;
3158 /* Say where in the source. */
3159 DECL_SOURCE_LOCATION (decl
) = location
;
3161 ent
->binding_level
= current_binding_level
;
3162 ent
->names_in_scope
= current_binding_level
->names
;
3164 for (use
= ent
->uses
; use
; use
= use
->next
)
3165 check_previous_goto (decl
, use
);
3172 /* Wrapper for define_label_1. */
3175 define_label (location_t location
, tree name
)
3178 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3179 ret
= define_label_1 (location
, name
);
3180 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3187 cp_binding_level
*level
;
3188 struct cp_switch
*next
;
3189 /* The SWITCH_STMT being built. */
3191 /* A splay-tree mapping the low element of a case range to the high
3192 element, or NULL_TREE if there is no high element. Used to
3193 determine whether or not a new case label duplicates an old case
3194 label. We need a tree, rather than simply a hash table, because
3195 of the GNU case range extension. */
3199 /* A stack of the currently active switch statements. The innermost
3200 switch statement is on the top of the stack. There is no need to
3201 mark the stack for garbage collection because it is only active
3202 during the processing of the body of a function, and we never
3203 collect at that point. */
3205 static struct cp_switch
*switch_stack
;
3207 /* Called right after a switch-statement condition is parsed.
3208 SWITCH_STMT is the switch statement being parsed. */
3211 push_switch (tree switch_stmt
)
3213 struct cp_switch
*p
= XNEW (struct cp_switch
);
3214 p
->level
= current_binding_level
;
3215 p
->next
= switch_stack
;
3216 p
->switch_stmt
= switch_stmt
;
3217 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3224 struct cp_switch
*cs
= switch_stack
;
3225 location_t switch_location
;
3227 /* Emit warnings as needed. */
3228 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3229 if (!processing_template_decl
)
3230 c_do_switch_warnings (cs
->cases
, switch_location
,
3231 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3232 SWITCH_STMT_COND (cs
->switch_stmt
));
3234 splay_tree_delete (cs
->cases
);
3235 switch_stack
= switch_stack
->next
;
3239 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3240 condition. Note that if TYPE and VALUE are already integral we don't
3241 really do the conversion because the language-independent
3242 warning/optimization code will work better that way. */
3245 case_conversion (tree type
, tree value
)
3247 if (value
== NULL_TREE
)
3250 if (cxx_dialect
>= cxx11
3251 && (SCOPED_ENUM_P (type
)
3252 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3254 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3255 type
= type_promotes_to (type
);
3256 value
= (perform_implicit_conversion_flags
3257 (type
, value
, tf_warning_or_error
,
3258 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3260 return cxx_constant_value (value
);
3263 /* Note that we've seen a definition of a case label, and complain if this
3264 is a bad place for one. */
3267 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3270 cp_binding_level
*p
;
3273 if (processing_template_decl
)
3277 /* For templates, just add the case label; we'll do semantic
3278 analysis at instantiation-time. */
3279 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3280 return add_stmt (build_case_label (low_value
, high_value
, label
));
3283 /* Find the condition on which this switch statement depends. */
3284 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3285 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3286 cond
= TREE_VALUE (cond
);
3288 if (!check_switch_goto (switch_stack
->level
))
3289 return error_mark_node
;
3291 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3293 low_value
= case_conversion (type
, low_value
);
3294 high_value
= case_conversion (type
, high_value
);
3296 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3297 low_value
, high_value
);
3299 /* After labels, make any new cleanups in the function go into their
3300 own new (temporary) binding contour. */
3301 for (p
= current_binding_level
;
3302 p
->kind
!= sk_function_parms
;
3304 p
->more_cleanups_ok
= 0;
3309 struct typename_info
{
3317 struct typename_hasher
: ggc_hasher
<tree
>
3319 typedef typename_info
*compare_type
;
3321 /* Hash a TYPENAME_TYPE. */
3328 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3329 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3334 /* Compare two TYPENAME_TYPEs. */
3337 equal (tree t1
, const typename_info
*t2
)
3339 return (TYPE_IDENTIFIER (t1
) == t2
->name
3340 && TYPE_CONTEXT (t1
) == t2
->scope
3341 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3342 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3343 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3347 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3348 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3350 Returns the new TYPENAME_TYPE. */
3352 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3355 build_typename_type (tree context
, tree name
, tree fullname
,
3356 enum tag_types tag_type
)
3364 if (typename_htab
== NULL
)
3365 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3367 ti
.scope
= FROB_CONTEXT (context
);
3369 ti
.template_id
= fullname
;
3370 ti
.enum_p
= tag_type
== enum_type
;
3371 ti
.class_p
= (tag_type
== class_type
3372 || tag_type
== record_type
3373 || tag_type
== union_type
);
3374 hash
= (htab_hash_pointer (ti
.scope
)
3375 ^ htab_hash_pointer (ti
.name
));
3377 /* See if we already have this type. */
3378 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3383 /* Build the TYPENAME_TYPE. */
3384 t
= cxx_make_type (TYPENAME_TYPE
);
3385 TYPE_CONTEXT (t
) = ti
.scope
;
3386 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3387 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3388 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3390 /* Build the corresponding TYPE_DECL. */
3391 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3392 TYPE_NAME (TREE_TYPE (d
)) = d
;
3393 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3394 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3395 DECL_ARTIFICIAL (d
) = 1;
3397 /* Store it in the hash table. */
3400 /* TYPENAME_TYPEs must always be compared structurally, because
3401 they may or may not resolve down to another type depending on
3402 the currently open classes. */
3403 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3409 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3410 provided to name the type. Returns an appropriate type, unless an
3411 error occurs, in which case error_mark_node is returned. If we
3412 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3413 return that, rather than the _TYPE it corresponds to, in other
3414 cases we look through the type decl. If TF_ERROR is set, complain
3415 about errors, otherwise be quiet. */
3418 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3419 tsubst_flags_t complain
)
3425 if (name
== error_mark_node
3426 || context
== NULL_TREE
3427 || context
== error_mark_node
)
3428 return error_mark_node
;
3432 if (!(TYPE_LANG_SPECIFIC (name
)
3433 && (CLASSTYPE_IS_TEMPLATE (name
)
3434 || CLASSTYPE_USE_TEMPLATE (name
))))
3435 name
= TYPE_IDENTIFIER (name
);
3437 /* Create a TEMPLATE_ID_EXPR for the type. */
3438 name
= build_nt (TEMPLATE_ID_EXPR
,
3439 CLASSTYPE_TI_TEMPLATE (name
),
3440 CLASSTYPE_TI_ARGS (name
));
3442 else if (TREE_CODE (name
) == TYPE_DECL
)
3443 name
= DECL_NAME (name
);
3447 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3449 name
= TREE_OPERAND (name
, 0);
3450 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3451 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3452 else if (TREE_CODE (name
) == OVERLOAD
)
3454 if (complain
& tf_error
)
3455 error ("%qD is not a type", name
);
3456 return error_mark_node
;
3459 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3461 if (complain
& tf_error
)
3462 error ("%qD used without template parameters", name
);
3463 return error_mark_node
;
3465 gcc_assert (identifier_p (name
));
3466 gcc_assert (TYPE_P (context
));
3468 if (!MAYBE_CLASS_TYPE_P (context
))
3470 if (complain
& tf_error
)
3471 error ("%q#T is not a class", context
);
3472 return error_mark_node
;
3475 /* When the CONTEXT is a dependent type, NAME could refer to a
3476 dependent base class of CONTEXT. But look inside it anyway
3477 if CONTEXT is a currently open scope, in case it refers to a
3478 member of the current instantiation or a non-dependent base;
3479 lookup will stop when we hit a dependent base. */
3480 if (!dependent_scope_p (context
))
3481 /* We should only set WANT_TYPE when we're a nested typename type.
3482 Then we can give better diagnostics if we find a non-type. */
3483 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3487 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3488 return build_typename_type (context
, name
, fullname
, tag_type
);
3490 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3494 if (complain
& tf_error
)
3495 error (want_template
? G_("no class template named %q#T in %q#T")
3496 : G_("no type named %q#T in %q#T"), name
, context
);
3497 return error_mark_node
;
3500 /* Pull out the template from an injected-class-name (or multiple). */
3502 t
= maybe_get_template_decl_from_type_decl (t
);
3504 if (TREE_CODE (t
) == TREE_LIST
)
3506 if (complain
& tf_error
)
3508 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3509 print_candidates (t
);
3511 return error_mark_node
;
3514 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3516 if (complain
& tf_error
)
3517 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3519 return error_mark_node
;
3521 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3523 if (complain
& tf_error
)
3524 error ("%<typename %T::%D%> names %q#T, which is not a type",
3526 return error_mark_node
;
3529 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3530 return error_mark_node
;
3532 /* If we are currently parsing a template and if T is a typedef accessed
3533 through CONTEXT then we need to remember and check access of T at
3534 template instantiation time. */
3535 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3538 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3540 /*entering_scope=*/0,
3541 tf_warning_or_error
| tf_user
);
3543 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3546 maybe_record_typedef_use (t
);
3551 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3552 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3553 in which case error_mark_node is returned.
3555 If PARM_LIST is non-NULL, also make sure that the template parameter
3556 list of TEMPLATE_DECL matches.
3558 If COMPLAIN zero, don't complain about any errors that occur. */
3561 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3562 tsubst_flags_t complain
)
3568 name
= TYPE_IDENTIFIER (name
);
3569 else if (DECL_P (name
))
3570 name
= DECL_NAME (name
);
3571 gcc_assert (identifier_p (name
));
3573 if (!dependent_type_p (context
)
3574 || currently_open_class (context
))
3576 tree tmpl
= NULL_TREE
;
3578 if (MAYBE_CLASS_TYPE_P (context
))
3579 tmpl
= lookup_field (context
, name
, 0, false);
3581 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3582 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3584 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3586 if (complain
& tf_error
)
3587 error ("no class template named %q#T in %q#T", name
, context
);
3588 return error_mark_node
;
3592 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3594 if (complain
& tf_error
)
3596 error ("template parameters do not match template %qD", tmpl
);
3597 inform (DECL_SOURCE_LOCATION (tmpl
),
3598 "%qD declared here", tmpl
);
3600 return error_mark_node
;
3603 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3605 return error_mark_node
;
3610 /* Build the UNBOUND_CLASS_TEMPLATE. */
3611 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3612 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3613 TREE_TYPE (t
) = NULL_TREE
;
3614 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3616 /* Build the corresponding TEMPLATE_DECL. */
3617 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3618 TYPE_NAME (TREE_TYPE (d
)) = d
;
3619 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3620 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3621 DECL_ARTIFICIAL (d
) = 1;
3622 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3629 /* Push the declarations of builtin types into the namespace.
3630 RID_INDEX is the index of the builtin type in the array
3631 RID_POINTERS. NAME is the name used when looking up the builtin
3632 type. TYPE is the _TYPE node for the builtin type. */
3635 record_builtin_type (enum rid rid_index
,
3639 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3640 tree tdecl
= NULL_TREE
;
3642 if ((int) rid_index
< (int) RID_MAX
)
3643 rname
= ridpointers
[(int) rid_index
];
3645 tname
= get_identifier (name
);
3647 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3648 eliminated. Built-in types should not be looked up name; their
3649 names are keywords that the parser can recognize. However, there
3650 is code in c-common.c that uses identifier_global_value to look
3651 up built-in types by name. */
3654 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3655 DECL_ARTIFICIAL (tdecl
) = 1;
3656 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3662 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3663 DECL_ARTIFICIAL (tdecl
) = 1;
3665 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3668 if (!TYPE_NAME (type
))
3669 TYPE_NAME (type
) = tdecl
;
3672 debug_hooks
->type_decl (tdecl
, 0);
3675 /* Record one of the standard Java types.
3676 * Declare it as having the given NAME.
3677 * If SIZE > 0, it is the size of one of the integral types;
3678 * otherwise it is the negative of the size of one of the other types. */
3681 record_builtin_java_type (const char* name
, int size
)
3686 type
= build_nonstandard_integer_type (size
, 0);
3687 type
= build_distinct_type_copy (type
);
3689 else if (size
> -32)
3692 /* "__java_char" or ""__java_boolean". */
3693 type
= build_nonstandard_integer_type (-size
, 1);
3694 type
= build_distinct_type_copy (type
);
3695 /* Get the signed type cached and attached to the unsigned type,
3696 so it doesn't get garbage-collected at "random" times,
3697 causing potential codegen differences out of different UIDs
3698 and different alias set numbers. */
3699 stype
= build_nonstandard_integer_type (-size
, 0);
3700 stype
= build_distinct_type_copy (stype
);
3701 TREE_CHAIN (type
) = stype
;
3702 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3705 { /* "__java_float" or ""__java_double". */
3706 type
= make_node (REAL_TYPE
);
3707 TYPE_PRECISION (type
) = - size
;
3710 record_builtin_type (RID_MAX
, name
, type
);
3711 decl
= TYPE_NAME (type
);
3713 /* Suppress generate debug symbol entries for these types,
3714 since for normal C++ they are just clutter.
3715 However, push_lang_context undoes this if extern "Java" is seen. */
3716 DECL_IGNORED_P (decl
) = 1;
3718 TYPE_FOR_JAVA (type
) = 1;
3722 /* Push a type into the namespace so that the back ends ignore it. */
3725 record_unknown_type (tree type
, const char* name
)
3727 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3728 TYPE_DECL
, get_identifier (name
), type
));
3729 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3730 DECL_IGNORED_P (decl
) = 1;
3731 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3732 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3733 TYPE_ALIGN (type
) = 1;
3734 TYPE_USER_ALIGN (type
) = 0;
3735 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3738 /* A string for which we should create an IDENTIFIER_NODE at
3741 typedef struct predefined_identifier
3743 /* The name of the identifier. */
3744 const char *const name
;
3745 /* The place where the IDENTIFIER_NODE should be stored. */
3747 /* Nonzero if this is the name of a constructor or destructor. */
3748 const int ctor_or_dtor_p
;
3749 } predefined_identifier
;
3751 /* Create all the predefined identifiers. */
3754 initialize_predefined_identifiers (void)
3756 const predefined_identifier
*pid
;
3758 /* A table of identifiers to create at startup. */
3759 static const predefined_identifier predefined_identifiers
[] = {
3760 { "C++", &lang_name_cplusplus
, 0 },
3761 { "C", &lang_name_c
, 0 },
3762 { "Java", &lang_name_java
, 0 },
3763 /* Some of these names have a trailing space so that it is
3764 impossible for them to conflict with names written by users. */
3765 { "__ct ", &ctor_identifier
, 1 },
3766 { "__base_ctor ", &base_ctor_identifier
, 1 },
3767 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3768 { "__dt ", &dtor_identifier
, 1 },
3769 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3770 { "__base_dtor ", &base_dtor_identifier
, 1 },
3771 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3772 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3773 { "nelts", &nelts_identifier
, 0 },
3774 { THIS_NAME
, &this_identifier
, 0 },
3775 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3776 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3777 { "_vptr", &vptr_identifier
, 0 },
3778 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3779 { "::", &global_scope_name
, 0 },
3780 { "std", &std_identifier
, 0 },
3784 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3786 *pid
->node
= get_identifier (pid
->name
);
3787 if (pid
->ctor_or_dtor_p
)
3788 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3792 /* Create the predefined scalar types of C,
3793 and some nodes representing standard constants (0, 1, (void *)0).
3794 Initialize the global binding level.
3795 Make definitions for built-in primitive functions. */
3798 cxx_init_decl_processing (void)
3801 tree void_ftype_ptr
;
3803 /* Create all the identifiers we need. */
3804 initialize_predefined_identifiers ();
3806 /* Create the global variables. */
3807 push_to_top_level ();
3809 current_function_decl
= NULL_TREE
;
3810 current_binding_level
= NULL
;
3811 /* Enter the global namespace. */
3812 gcc_assert (global_namespace
== NULL_TREE
);
3813 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3815 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3816 TREE_PUBLIC (global_namespace
) = 1;
3817 begin_scope (sk_namespace
, global_namespace
);
3819 if (flag_visibility_ms_compat
)
3820 default_visibility
= VISIBILITY_HIDDEN
;
3823 current_lang_name
= lang_name_c
;
3825 /* Create the `std' namespace. */
3826 push_namespace (std_identifier
);
3827 std_node
= current_namespace
;
3830 c_common_nodes_and_builtins ();
3832 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3833 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3834 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3835 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3836 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3837 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3838 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3839 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3841 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3843 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3844 truthvalue_type_node
= boolean_type_node
;
3845 truthvalue_false_node
= boolean_false_node
;
3846 truthvalue_true_node
= boolean_true_node
;
3848 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3849 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3850 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3853 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3856 delta_type_node
= ptrdiff_type_node
;
3857 vtable_index_type
= ptrdiff_type_node
;
3859 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3860 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3861 void_ftype_ptr
= build_function_type_list (void_type_node
,
3862 ptr_type_node
, NULL_TREE
);
3864 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3866 /* C++ extensions */
3868 unknown_type_node
= make_node (LANG_TYPE
);
3869 record_unknown_type (unknown_type_node
, "unknown type");
3871 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3872 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3874 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3876 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3877 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3879 init_list_type_node
= make_node (LANG_TYPE
);
3880 record_unknown_type (init_list_type_node
, "init list");
3883 /* Make sure we get a unique function type, so we can give
3884 its pointer type a name. (This wins for gdb.) */
3885 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3886 TREE_TYPE (vfunc_type
) = integer_type_node
;
3887 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3888 layout_type (vfunc_type
);
3890 vtable_entry_type
= build_pointer_type (vfunc_type
);
3892 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3895 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3896 layout_type (vtbl_type_node
);
3897 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3898 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3899 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3900 layout_type (vtbl_ptr_type_node
);
3901 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3903 push_namespace (get_identifier ("__cxxabiv1"));
3904 abi_node
= current_namespace
;
3907 global_type_node
= make_node (LANG_TYPE
);
3908 record_unknown_type (global_type_node
, "global type");
3911 current_lang_name
= lang_name_cplusplus
;
3914 tree newattrs
, extvisattr
;
3915 tree newtype
, deltype
;
3916 tree ptr_ftype_sizetype
;
3920 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3921 if (cxx_dialect
== cxx98
)
3924 tree bad_alloc_type_node
;
3925 tree bad_alloc_decl
;
3927 push_namespace (std_identifier
);
3928 bad_alloc_id
= get_identifier ("bad_alloc");
3929 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3930 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3932 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3933 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3937 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3940 new_eh_spec
= noexcept_false_spec
;
3942 /* Ensure attribs.c is initialized. */
3944 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3946 newattrs
= tree_cons (get_identifier ("alloc_size"),
3947 build_tree_list (NULL_TREE
, integer_one_node
),
3949 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3950 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3951 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3952 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3953 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3954 DECL_IS_MALLOC (opnew
) = 1;
3955 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3956 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3957 DECL_IS_MALLOC (opnew
) = 1;
3958 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3959 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3960 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3961 if (flag_sized_deallocation
)
3963 /* Also push the sized deallocation variants:
3964 void operator delete(void*, std::size_t) throw();
3965 void operator delete[](void*, std::size_t) throw(); */
3966 tree void_ftype_ptr_size
3967 = build_function_type_list (void_type_node
, ptr_type_node
,
3968 size_type_node
, NULL_TREE
);
3969 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
3971 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3972 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3973 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3976 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3977 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3978 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3979 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3980 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3981 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3982 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3983 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3987 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3988 ECF_NORETURN
| ECF_NOTHROW
);
3990 /* Perform other language dependent initializations. */
3991 init_class_processing ();
3992 init_rtti_processing ();
3993 init_template_processing ();
3995 if (flag_exceptions
)
3996 init_exception_processing ();
3998 if (! supports_one_only ())
4001 make_fname_decl
= cp_make_fname_decl
;
4002 start_fname_decls ();
4004 /* Show we use EH for cleanups. */
4005 if (flag_exceptions
)
4006 using_eh_for_cleanups ();
4009 /* Generate an initializer for a function naming variable from
4010 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4011 filled in with the type of the init. */
4014 cp_fname_init (const char* name
, tree
*type_p
)
4016 tree domain
= NULL_TREE
;
4018 tree init
= NULL_TREE
;
4023 length
= strlen (name
);
4024 domain
= build_index_type (size_int (length
));
4025 init
= build_string (length
+ 1, name
);
4028 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4029 type
= build_cplus_array_type (type
, domain
);
4034 TREE_TYPE (init
) = type
;
4036 init
= error_mark_node
;
4041 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4042 the decl, LOC is the location to give the decl, NAME is the
4043 initialization string and TYPE_DEP indicates whether NAME depended
4044 on the type of the function. We make use of that to detect
4045 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4046 at the point of first use, so we mustn't push the decl now. */
4049 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4051 const char *const name
= (type_dep
&& processing_template_decl
4052 ? NULL
: fname_as_string (type_dep
));
4054 tree init
= cp_fname_init (name
, &type
);
4055 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4058 free (CONST_CAST (char *, name
));
4060 /* As we're using pushdecl_with_scope, we must set the context. */
4061 DECL_CONTEXT (decl
) = current_function_decl
;
4063 TREE_STATIC (decl
) = 1;
4064 TREE_READONLY (decl
) = 1;
4065 DECL_ARTIFICIAL (decl
) = 1;
4067 TREE_USED (decl
) = 1;
4069 if (current_function_decl
)
4071 cp_binding_level
*b
= current_binding_level
;
4072 if (b
->kind
== sk_function_parms
)
4073 return error_mark_node
;
4074 while (b
->level_chain
->kind
!= sk_function_parms
)
4076 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4077 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4078 LOOKUP_ONLYCONVERTING
);
4082 DECL_THIS_STATIC (decl
) = true;
4083 pushdecl_top_level_and_finish (decl
, init
);
4090 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4092 tree id
= DECL_NAME (decl
);
4093 const char *name
= IDENTIFIER_POINTER (id
);
4095 retrofit_lang_decl (decl
);
4097 DECL_ARTIFICIAL (decl
) = 1;
4098 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4099 SET_DECL_LANGUAGE (decl
, lang_c
);
4100 /* Runtime library routines are, by definition, available in an
4101 external shared object. */
4102 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4103 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4105 DECL_CONTEXT (decl
) = context
;
4108 pushdecl_top_level (decl
);
4112 /* A function in the user's namespace should have an explicit
4113 declaration before it is used. Mark the built-in function as
4114 anticipated but not actually declared. */
4115 if (name
[0] != '_' || name
[1] != '_')
4116 DECL_ANTICIPATED (decl
) = 1;
4117 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4119 size_t len
= strlen (name
);
4121 /* Treat __*_chk fortification functions as anticipated as well,
4122 unless they are __builtin_*. */
4123 if (len
> strlen ("___chk")
4124 && memcmp (name
+ len
- strlen ("_chk"),
4125 "_chk", strlen ("_chk") + 1) == 0)
4126 DECL_ANTICIPATED (decl
) = 1;
4133 cxx_builtin_function (tree decl
)
4135 tree id
= DECL_NAME (decl
);
4136 const char *name
= IDENTIFIER_POINTER (id
);
4137 /* All builtins that don't begin with an '_' should additionally
4138 go in the 'std' namespace. */
4141 tree decl2
= copy_node(decl
);
4142 push_namespace (std_identifier
);
4143 builtin_function_1 (decl2
, std_node
, false);
4147 return builtin_function_1 (decl
, NULL_TREE
, false);
4150 /* Like cxx_builtin_function, but guarantee the function is added to the global
4151 scope. This is to allow function specific options to add new machine
4152 dependent builtins when the target ISA changes via attribute((target(...)))
4153 which saves space on program startup if the program does not use non-generic
4157 cxx_builtin_function_ext_scope (tree decl
)
4160 tree id
= DECL_NAME (decl
);
4161 const char *name
= IDENTIFIER_POINTER (id
);
4162 /* All builtins that don't begin with an '_' should additionally
4163 go in the 'std' namespace. */
4166 tree decl2
= copy_node(decl
);
4167 push_namespace (std_identifier
);
4168 builtin_function_1 (decl2
, std_node
, true);
4172 return builtin_function_1 (decl
, NULL_TREE
, true);
4175 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4176 function. Not called directly. */
4179 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4182 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4183 DECL_EXTERNAL (fn
) = 1;
4184 TREE_PUBLIC (fn
) = 1;
4185 DECL_ARTIFICIAL (fn
) = 1;
4186 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4187 SET_DECL_LANGUAGE (fn
, lang_c
);
4188 /* Runtime library routines are, by definition, available in an
4189 external shared object. */
4190 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4191 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4192 set_call_expr_flags (fn
, ecf_flags
);
4196 /* Returns the _DECL for a library function with C++ linkage. */
4199 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4202 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4203 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4204 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4208 /* Like build_library_fn, but takes a C string instead of an
4212 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4214 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4217 /* Like build_cp_library_fn, but takes a C string instead of an
4221 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4223 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4227 /* Like build_library_fn, but also pushes the function so that we will
4228 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4229 may throw exceptions listed in RAISES. */
4232 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4237 type
= build_exception_variant (type
, raises
);
4239 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4240 pushdecl_top_level (fn
);
4244 /* Like build_cp_library_fn, but also pushes the function so that it
4245 will be found by normal lookup. */
4248 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4251 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4256 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4260 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4264 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4266 tree type
= build_function_type (void_type_node
, parmtypes
);
4267 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4270 /* Like push_library_fn, but also note that this function throws
4271 and does not return. Used for __throw_foo and the like. */
4274 push_throw_library_fn (tree name
, tree type
)
4276 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4280 /* When we call finish_struct for an anonymous union, we create
4281 default copy constructors and such. But, an anonymous union
4282 shouldn't have such things; this function undoes the damage to the
4283 anonymous union type T.
4285 (The reason that we create the synthesized methods is that we don't
4286 distinguish `union { int i; }' from `typedef union { int i; } U'.
4287 The first is an anonymous union; the second is just an ordinary
4291 fixup_anonymous_aggr (tree t
)
4295 /* Wipe out memory of synthesized methods. */
4296 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4297 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4298 TYPE_HAS_COPY_CTOR (t
) = 0;
4299 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4300 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4301 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4303 /* Splice the implicitly generated functions out of the TYPE_METHODS
4305 q
= &TYPE_METHODS (t
);
4308 if (DECL_ARTIFICIAL (*q
))
4309 *q
= TREE_CHAIN (*q
);
4311 q
= &DECL_CHAIN (*q
);
4314 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4315 if (TYPE_METHODS (t
))
4317 tree decl
= TYPE_MAIN_DECL (t
);
4319 if (TREE_CODE (t
) != UNION_TYPE
)
4320 error_at (DECL_SOURCE_LOCATION (decl
),
4321 "an anonymous struct cannot have function members");
4323 error_at (DECL_SOURCE_LOCATION (decl
),
4324 "an anonymous union cannot have function members");
4327 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4328 assignment operators (because they cannot have these methods themselves).
4329 For anonymous unions this is already checked because they are not allowed
4330 in any union, otherwise we have to check it. */
4331 if (TREE_CODE (t
) != UNION_TYPE
)
4335 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4336 if (TREE_CODE (field
) == FIELD_DECL
)
4338 type
= TREE_TYPE (field
);
4339 if (CLASS_TYPE_P (type
))
4341 if (TYPE_NEEDS_CONSTRUCTING (type
))
4342 error ("member %q+#D with constructor not allowed "
4343 "in anonymous aggregate", field
);
4344 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4345 error ("member %q+#D with destructor not allowed "
4346 "in anonymous aggregate", field
);
4347 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4348 error ("member %q+#D with copy assignment operator "
4349 "not allowed in anonymous aggregate", field
);
4355 /* Warn for an attribute located at LOCATION that appertains to the
4356 class type CLASS_TYPE that has not been properly placed after its
4357 class-key, in it class-specifier. */
4360 warn_misplaced_attr_for_class_type (source_location location
,
4363 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4365 if (warning_at (location
, OPT_Wattributes
,
4366 "attribute ignored in declaration "
4367 "of %q#T", class_type
))
4369 "attribute for %q#T must follow the %qs keyword",
4370 class_type
, class_key_or_enum_as_string (class_type
));
4373 /* Make sure that a declaration with no declarator is well-formed, i.e.
4374 just declares a tagged type or anonymous union.
4376 Returns the type declared; or NULL_TREE if none. */
4379 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4380 bool explicit_type_instantiation_p
)
4382 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4383 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4384 /* If a class, struct, or enum type is declared by the DECLSPECS
4385 (i.e, if a class-specifier, enum-specifier, or non-typename
4386 elaborated-type-specifier appears in the DECLSPECS),
4387 DECLARED_TYPE is set to the corresponding type. */
4388 tree declared_type
= NULL_TREE
;
4389 bool error_p
= false;
4391 if (declspecs
->multiple_types_p
)
4392 error ("multiple types in one declaration");
4393 else if (declspecs
->redefined_builtin_type
)
4395 if (!in_system_header_at (input_location
))
4396 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4397 "redeclaration of C++ built-in type %qT",
4398 declspecs
->redefined_builtin_type
);
4403 && TYPE_P (declspecs
->type
)
4404 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4405 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4406 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4407 declared_type
= declspecs
->type
;
4408 else if (declspecs
->type
== error_mark_node
)
4410 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4411 permerror (input_location
, "declaration does not declare anything");
4412 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4414 error ("%<auto%> can only be specified for variables "
4415 "or function declarations");
4416 return error_mark_node
;
4418 /* Check for an anonymous union. */
4419 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4420 && TYPE_ANONYMOUS_P (declared_type
))
4422 /* 7/3 In a simple-declaration, the optional init-declarator-list
4423 can be omitted only when declaring a class (clause 9) or
4424 enumeration (7.2), that is, when the decl-specifier-seq contains
4425 either a class-specifier, an elaborated-type-specifier with
4426 a class-key (9.1), or an enum-specifier. In these cases and
4427 whenever a class-specifier or enum-specifier is present in the
4428 decl-specifier-seq, the identifiers in these specifiers are among
4429 the names being declared by the declaration (as class-name,
4430 enum-names, or enumerators, depending on the syntax). In such
4431 cases, and except for the declaration of an unnamed bit-field (9.6),
4432 the decl-specifier-seq shall introduce one or more names into the
4433 program, or shall redeclare a name introduced by a previous
4434 declaration. [Example:
4435 enum { }; // ill-formed
4436 typedef class { }; // ill-formed
4440 error ("missing type-name in typedef-declaration");
4443 /* Anonymous unions are objects, so they can have specifiers. */;
4444 SET_ANON_AGGR_TYPE_P (declared_type
);
4446 if (TREE_CODE (declared_type
) != UNION_TYPE
4447 && !in_system_header_at (input_location
))
4448 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4453 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4454 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4455 error ("%qs can only be specified for functions",
4456 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4457 ? "inline" : "virtual");
4459 && (!current_class_type
4460 || current_scope () != current_class_type
))
4461 error ("%<friend%> can only be specified inside a class");
4462 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4463 error ("%<explicit%> can only be specified for constructors");
4464 else if (declspecs
->storage_class
)
4465 error ("a storage class can only be specified for objects "
4467 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4468 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4469 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4470 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4471 error ("qualifiers can only be specified for objects "
4473 else if (saw_typedef
)
4474 warning (0, "%<typedef%> was ignored in this declaration");
4475 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4476 error ("%<constexpr%> cannot be used for type declarations");
4479 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4482 if (!CLASS_TYPE_P (declared_type
)
4483 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4484 /* For a non-template class, use the name location. */
4485 loc
= location_of (declared_type
);
4487 /* For a template class (an explicit instantiation), use the
4488 current location. */
4489 loc
= input_location
;
4491 if (explicit_type_instantiation_p
)
4492 /* [dcl.attr.grammar]/4:
4494 No attribute-specifier-seq shall appertain to an explicit
4497 if (warning_at (loc
, OPT_Wattributes
,
4498 "attribute ignored in explicit instantiation %q#T",
4501 "no attribute can be applied to "
4502 "an explicit instantiation");
4505 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4508 return declared_type
;
4511 /* Called when a declaration is seen that contains no names to declare.
4512 If its type is a reference to a structure, union or enum inherited
4513 from a containing scope, shadow that tag name for the current scope
4514 with a forward reference.
4515 If its type defines a new named structure or union
4516 or defines an enum, it is valid but we need not do anything here.
4517 Otherwise, it is an error.
4519 C++: may have to grok the declspecs to learn about static,
4520 complain for anonymous unions.
4522 Returns the TYPE declared -- or NULL_TREE if none. */
4525 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4527 tree t
= check_tag_decl (declspecs
,
4528 /*explicit_type_instantiation_p=*/false);
4533 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4536 /* This is where the variables in an anonymous union are
4537 declared. An anonymous union declaration looks like:
4539 because there is no declarator after the union, the parser
4540 sends that declaration here. */
4541 if (ANON_AGGR_TYPE_P (t
))
4543 fixup_anonymous_aggr (t
);
4545 if (TYPE_FIELDS (t
))
4547 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4548 declspecs
, NORMAL
, 0, NULL
);
4549 finish_anon_union (decl
);
4556 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4559 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4560 const cp_declarator
*declarator
,
4561 bool is_template_arg
)
4565 enum decl_context context
4566 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4567 attrs
= type_specifiers
->attributes
;
4568 type_specifiers
->attributes
= NULL_TREE
;
4569 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4570 if (attrs
&& type
!= error_mark_node
)
4572 if (CLASS_TYPE_P (type
))
4573 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4574 "outside of definition", type
);
4575 else if (MAYBE_CLASS_TYPE_P (type
))
4576 /* A template type parameter or other dependent type. */
4577 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4578 "type %qT without an associated declaration", type
);
4580 cplus_decl_attributes (&type
, attrs
, 0);
4585 /* Process a DECLARATOR for a function-scope variable declaration,
4586 namespace-scope variable declaration, or function declaration.
4587 (Function definitions go through start_function; class member
4588 declarations appearing in the body of the class go through
4589 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4590 If an error occurs, the error_mark_node is returned instead.
4592 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4593 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4594 for an explicitly defaulted function, or SD_DELETED for an explicitly
4595 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4596 implicitly initialized via a default constructor. ATTRIBUTES and
4597 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4599 The scope represented by the context of the returned DECL is pushed
4600 (if it is not the global namespace) and is assigned to
4601 *PUSHED_SCOPE_P. The caller is then responsible for calling
4602 pop_scope on *PUSHED_SCOPE_P if it is set. */
4605 start_decl (const cp_declarator
*declarator
,
4606 cp_decl_specifier_seq
*declspecs
,
4609 tree prefix_attributes
,
4610 tree
*pushed_scope_p
)
4618 *pushed_scope_p
= NULL_TREE
;
4620 /* An object declared as __attribute__((deprecated)) suppresses
4621 warnings of uses of other deprecated items. */
4622 if (lookup_attribute ("deprecated", attributes
))
4623 deprecated_state
= DEPRECATED_SUPPRESS
;
4625 attributes
= chainon (attributes
, prefix_attributes
);
4627 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4630 deprecated_state
= DEPRECATED_NORMAL
;
4632 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4633 || decl
== error_mark_node
)
4634 return error_mark_node
;
4636 context
= CP_DECL_CONTEXT (decl
);
4637 if (context
!= global_namespace
)
4638 *pushed_scope_p
= push_scope (context
);
4640 /* Is it valid for this decl to have an initializer at all?
4641 If not, set INITIALIZED to zero, which will indirectly
4642 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4644 && TREE_CODE (decl
) == TYPE_DECL
)
4646 error ("typedef %qD is initialized (use decltype instead)", decl
);
4647 return error_mark_node
;
4652 if (! toplevel_bindings_p ()
4653 && DECL_EXTERNAL (decl
))
4654 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4656 DECL_EXTERNAL (decl
) = 0;
4657 if (toplevel_bindings_p ())
4658 TREE_STATIC (decl
) = 1;
4660 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4662 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4663 record_key_method_defined (decl
);
4665 /* If this is a typedef that names the class for linkage purposes
4666 (7.1.3p8), apply any attributes directly to the type. */
4667 if (TREE_CODE (decl
) == TYPE_DECL
4668 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4669 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4670 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4674 /* Set attributes here so if duplicate decl, will have proper attributes. */
4675 cplus_decl_attributes (&decl
, attributes
, flags
);
4677 /* Dllimported symbols cannot be defined. Static data members (which
4678 can be initialized in-class and dllimported) go through grokfield,
4679 not here, so we don't need to exclude those decls when checking for
4681 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4683 error ("definition of %q#D is marked %<dllimport%>", decl
);
4684 DECL_DLLIMPORT_P (decl
) = 0;
4687 /* If #pragma weak was used, mark the decl weak now. */
4688 if (!processing_template_decl
)
4689 maybe_apply_pragma_weak (decl
);
4691 if (TREE_CODE (decl
) == FUNCTION_DECL
4692 && DECL_DECLARED_INLINE_P (decl
)
4693 && DECL_UNINLINABLE (decl
)
4694 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4695 warning (0, "inline function %q+D given attribute noinline", decl
);
4697 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4699 bool this_tmpl
= (processing_template_decl
4700 > template_class_depth (context
));
4703 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4704 if (field
== NULL_TREE
4705 || !(VAR_P (field
) || variable_template_p (field
)))
4706 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4707 else if (variable_template_p (field
) && !this_tmpl
)
4709 if (DECL_LANG_SPECIFIC (decl
)
4710 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4711 /* OK, specialization was already checked. */;
4714 error_at (DECL_SOURCE_LOCATION (decl
),
4715 "non-member-template declaration of %qD", decl
);
4716 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4717 "member template declaration here");
4718 return error_mark_node
;
4723 if (variable_template_p (field
))
4724 field
= DECL_TEMPLATE_RESULT (field
);
4726 if (DECL_CONTEXT (field
) != context
)
4728 if (!same_type_p (DECL_CONTEXT (field
), context
))
4729 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4730 "to be defined as %<%T::%D%>",
4731 DECL_CONTEXT (field
), DECL_NAME (decl
),
4732 context
, DECL_NAME (decl
));
4733 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4735 /* Static data member are tricky; an in-class initialization
4736 still doesn't provide a definition, so the in-class
4737 declaration will have DECL_EXTERNAL set, but will have an
4738 initialization. Thus, duplicate_decls won't warn
4739 about this situation, and so we check here. */
4740 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4741 error ("duplicate initialization of %qD", decl
);
4742 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4744 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4745 && !DECL_DECLARED_CONSTEXPR_P (field
))
4746 error ("%qD declared %<constexpr%> outside its class", field
);
4751 tree field
= check_classfn (context
, decl
,
4753 ? current_template_parms
4755 if (field
&& field
!= error_mark_node
4756 && duplicate_decls (decl
, field
,
4757 /*newdecl_is_friend=*/false))
4761 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4762 DECL_IN_AGGR_P (decl
) = 0;
4763 /* Do not mark DECL as an explicit specialization if it was not
4764 already marked as an instantiation; a declaration should
4765 never be marked as a specialization unless we know what
4766 template is being specialized. */
4767 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4769 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4770 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4771 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4772 && DECL_DECLARED_INLINE_P (decl
));
4774 DECL_COMDAT (decl
) = false;
4776 /* [temp.expl.spec] An explicit specialization of a static data
4777 member of a template is a definition if the declaration
4778 includes an initializer; otherwise, it is a declaration.
4780 We check for processing_specialization so this only applies
4781 to the new specialization syntax. */
4782 if (!initialized
&& processing_specialization
)
4783 DECL_EXTERNAL (decl
) = 1;
4786 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4787 /* Aliases are definitions. */
4789 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4793 was_public
= TREE_PUBLIC (decl
);
4795 /* Enter this declaration into the symbol table. */
4796 decl
= maybe_push_decl (decl
);
4798 if (processing_template_decl
)
4799 decl
= push_template_decl (decl
);
4800 if (decl
== error_mark_node
)
4801 return error_mark_node
;
4804 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4805 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4807 /* This is a const variable with implicit 'static'. Set
4808 DECL_THIS_STATIC so we can tell it from variables that are
4809 !TREE_PUBLIC because of the anonymous namespace. */
4810 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4811 DECL_THIS_STATIC (decl
) = 1;
4814 if (current_function_decl
&& VAR_P (decl
)
4815 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4818 if (DECL_THREAD_LOCAL_P (decl
))
4819 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4821 else if (TREE_STATIC (decl
))
4822 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4826 cp_function_chain
->invalid_constexpr
= true;
4829 if (!processing_template_decl
&& VAR_P (decl
))
4830 start_decl_1 (decl
, initialized
);
4835 /* Process the declaration of a variable DECL. INITIALIZED is true
4836 iff DECL is explicitly initialized. (INITIALIZED is false if the
4837 variable is initialized via an implicitly-called constructor.)
4838 This function must be called for ordinary variables (including, for
4839 example, implicit instantiations of templates), but must not be
4840 called for template declarations. */
4843 start_decl_1 (tree decl
, bool initialized
)
4847 bool aggregate_definition_p
;
4849 gcc_assert (!processing_template_decl
);
4851 if (error_operand_p (decl
))
4854 gcc_assert (VAR_P (decl
));
4856 type
= TREE_TYPE (decl
);
4857 complete_p
= COMPLETE_TYPE_P (type
);
4858 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4860 /* If an explicit initializer is present, or if this is a definition
4861 of an aggregate, then we need a complete type at this point.
4862 (Scalars are always complete types, so there is nothing to
4863 check.) This code just sets COMPLETE_P; errors (if necessary)
4864 are issued below. */
4865 if ((initialized
|| aggregate_definition_p
)
4867 && COMPLETE_TYPE_P (complete_type (type
)))
4870 /* We will not yet have set TREE_READONLY on DECL if the type
4871 was "const", but incomplete, before this point. But, now, we
4872 have a complete type, so we can try again. */
4873 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4877 /* Is it valid for this decl to have an initializer at all? */
4879 /* Don't allow initializations for incomplete types except for
4880 arrays which might be completed by the initialization. */
4882 ; /* A complete type is ok. */
4883 else if (type_uses_auto (type
))
4884 ; /* An auto type is ok. */
4885 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4887 error ("variable %q#D has initializer but incomplete type", decl
);
4888 type
= TREE_TYPE (decl
) = error_mark_node
;
4890 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4892 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4893 error ("elements of array %q#D have incomplete type", decl
);
4894 /* else we already gave an error in start_decl. */
4897 else if (aggregate_definition_p
&& !complete_p
)
4899 if (type_uses_auto (type
))
4900 error ("declaration of %q#D has no initializer", decl
);
4902 error ("aggregate %q#D has incomplete type and cannot be defined",
4904 /* Change the type so that assemble_variable will give
4905 DECL an rtl we can live with: (mem (const_int 0)). */
4906 type
= TREE_TYPE (decl
) = error_mark_node
;
4909 /* Create a new scope to hold this declaration if necessary.
4910 Whether or not a new scope is necessary cannot be determined
4911 until after the type has been completed; if the type is a
4912 specialization of a class template it is not until after
4913 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4914 will be set correctly. */
4915 maybe_push_cleanup_level (type
);
4918 /* Handle initialization of references. DECL, TYPE, and INIT have the
4919 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4920 but will be set to a new CLEANUP_STMT if a temporary is created
4921 that must be destroyed subsequently.
4923 Returns an initializer expression to use to initialize DECL, or
4924 NULL if the initialization can be performed statically.
4926 Quotes on semantics can be found in ARM 8.4.3. */
4929 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4931 if (init
== NULL_TREE
)
4933 if ((DECL_LANG_SPECIFIC (decl
) == 0
4934 || DECL_IN_AGGR_P (decl
) == 0)
4935 && ! DECL_THIS_EXTERN (decl
))
4936 error ("%qD declared as reference but not initialized", decl
);
4940 if (TREE_CODE (init
) == TREE_LIST
)
4941 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4942 tf_warning_or_error
);
4944 tree ttype
= TREE_TYPE (type
);
4945 if (TREE_CODE (ttype
) != ARRAY_TYPE
4946 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4947 /* Note: default conversion is only called in very special cases. */
4948 init
= decay_conversion (init
, tf_warning_or_error
);
4950 /* check_initializer handles this for non-reference variables, but for
4951 references we need to do it here or the initializer will get the
4952 incomplete array type and confuse later calls to
4953 cp_complete_array_type. */
4954 if (TREE_CODE (ttype
) == ARRAY_TYPE
4955 && TYPE_DOMAIN (ttype
) == NULL_TREE
4956 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
4957 || TREE_CODE (init
) == STRING_CST
))
4959 cp_complete_array_type (&ttype
, init
, false);
4960 if (ttype
!= TREE_TYPE (type
))
4961 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
4964 /* Convert INIT to the reference type TYPE. This may involve the
4965 creation of a temporary, whose lifetime must be the same as that
4966 of the reference. If so, a DECL_EXPR for the temporary will be
4967 added just after the DECL_EXPR for DECL. That's why we don't set
4968 DECL_INITIAL for local references (instead assigning to them
4969 explicitly); we need to allow the temporary to be initialized
4971 return initialize_reference (type
, init
, flags
,
4972 tf_warning_or_error
);
4975 /* Designated initializers in arrays are not supported in GNU C++.
4976 The parser cannot detect this error since it does not know whether
4977 a given brace-enclosed initializer is for a class type or for an
4978 array. This function checks that CE does not use a designated
4979 initializer. If it does, an error is issued. Returns true if CE
4980 is valid, i.e., does not have a designated initializer. */
4983 check_array_designated_initializer (constructor_elt
*ce
,
4984 unsigned HOST_WIDE_INT index
)
4986 /* Designated initializers for array elements are not supported. */
4989 /* The parser only allows identifiers as designated
4991 if (ce
->index
== error_mark_node
)
4993 error ("name used in a GNU-style designated "
4994 "initializer for an array");
4997 else if (identifier_p (ce
->index
))
4999 error ("name %qD used in a GNU-style designated "
5000 "initializer for an array", ce
->index
);
5004 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5007 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5008 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5011 /* A C99 designator is OK if it matches the current index. */
5012 if (wi::eq_p (ce_index
, index
))
5015 sorry ("non-trivial designated initializers not supported");
5018 error ("C99 designator %qE is not an integral constant-expression",
5027 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5028 array until we finish parsing the initializer. If that's the
5029 situation we're in, update DECL accordingly. */
5032 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5034 tree type
= TREE_TYPE (decl
);
5036 if (TREE_CODE (type
) == ARRAY_TYPE
5037 && TYPE_DOMAIN (type
) == NULL_TREE
5038 && TREE_CODE (decl
) != TYPE_DECL
)
5040 /* do_default is really a C-ism to deal with tentative definitions.
5041 But let's leave it here to ease the eventual merge. */
5042 int do_default
= !DECL_EXTERNAL (decl
);
5043 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5046 /* Check that there are no designated initializers in INIT, as
5047 those are not supported in GNU C++, and as the middle-end
5048 will crash if presented with a non-numeric designated
5050 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5052 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5053 constructor_elt
*ce
;
5055 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5056 if (!check_array_designated_initializer (ce
, i
))
5062 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5066 error ("initializer fails to determine size of %qD", decl
);
5068 else if (failure
== 2)
5072 error ("array size missing in %qD", decl
);
5074 /* If a `static' var's size isn't known, make it extern as
5075 well as static, so it does not get allocated. If it's not
5076 `static', then don't mark it extern; finish_incomplete_decl
5077 will give it a default size and it will get allocated. */
5078 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5079 DECL_EXTERNAL (decl
) = 1;
5081 else if (failure
== 3)
5083 error ("zero-size array %qD", decl
);
5087 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5089 relayout_decl (decl
);
5093 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5094 any appropriate error messages regarding the layout. */
5097 layout_var_decl (tree decl
)
5101 type
= TREE_TYPE (decl
);
5102 if (type
== error_mark_node
)
5105 /* If we haven't already laid out this declaration, do so now.
5106 Note that we must not call complete type for an external object
5107 because it's type might involve templates that we are not
5108 supposed to instantiate yet. (And it's perfectly valid to say
5109 `extern X x' for some incomplete type `X'.) */
5110 if (!DECL_EXTERNAL (decl
))
5111 complete_type (type
);
5112 if (!DECL_SIZE (decl
)
5113 && TREE_TYPE (decl
) != error_mark_node
5114 && (COMPLETE_TYPE_P (type
)
5115 || (TREE_CODE (type
) == ARRAY_TYPE
5116 && !TYPE_DOMAIN (type
)
5117 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5118 layout_decl (decl
, 0);
5120 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5122 /* An automatic variable with an incomplete type: that is an error.
5123 Don't talk about array types here, since we took care of that
5124 message in grokdeclarator. */
5125 error ("storage size of %qD isn%'t known", decl
);
5126 TREE_TYPE (decl
) = error_mark_node
;
5129 /* Keep this code around in case we later want to control debug info
5130 based on whether a type is "used". (jason 1999-11-11) */
5132 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5133 /* Let debugger know it should output info for this type. */
5134 note_debug_info_needed (ttype
);
5136 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5137 note_debug_info_needed (DECL_CONTEXT (decl
));
5140 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5141 && DECL_SIZE (decl
) != NULL_TREE
5142 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5144 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5145 constant_expression_warning (DECL_SIZE (decl
));
5148 error ("storage size of %qD isn%'t constant", decl
);
5149 TREE_TYPE (decl
) = error_mark_node
;
5154 /* If a local static variable is declared in an inline function, or if
5155 we have a weak definition, we must endeavor to create only one
5156 instance of the variable at link-time. */
5159 maybe_commonize_var (tree decl
)
5161 /* Static data in a function with comdat linkage also has comdat
5163 if (TREE_STATIC (decl
)
5164 /* Don't mess with __FUNCTION__. */
5165 && ! DECL_ARTIFICIAL (decl
)
5166 && DECL_FUNCTION_SCOPE_P (decl
)
5167 && vague_linkage_p (DECL_CONTEXT (decl
)))
5171 /* With weak symbols, we simply make the variable COMDAT;
5172 that will cause copies in multiple translations units to
5174 comdat_linkage (decl
);
5178 if (DECL_INITIAL (decl
) == NULL_TREE
5179 || DECL_INITIAL (decl
) == error_mark_node
)
5181 /* Without weak symbols, we can use COMMON to merge
5182 uninitialized variables. */
5183 TREE_PUBLIC (decl
) = 1;
5184 DECL_COMMON (decl
) = 1;
5188 /* While for initialized variables, we must use internal
5189 linkage -- which means that multiple copies will not
5191 TREE_PUBLIC (decl
) = 0;
5192 DECL_COMMON (decl
) = 0;
5193 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5194 "sorry: semantics of inline function static "
5195 "data %q#D are wrong (you%'ll wind up "
5196 "with multiple copies)", decl
))
5197 inform (DECL_SOURCE_LOCATION (decl
),
5198 "you can work around this by removing the initializer");
5204 /* Issue an error message if DECL is an uninitialized const variable. */
5207 check_for_uninitialized_const_var (tree decl
)
5209 tree type
= strip_array_types (TREE_TYPE (decl
));
5211 /* ``Unless explicitly declared extern, a const object does not have
5212 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5215 && TREE_CODE (type
) != REFERENCE_TYPE
5216 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5217 && !DECL_INITIAL (decl
))
5219 tree field
= default_init_uninitialized_part (type
);
5223 if (CP_TYPE_CONST_P (type
))
5224 permerror (DECL_SOURCE_LOCATION (decl
),
5225 "uninitialized const %qD", decl
);
5228 error_at (DECL_SOURCE_LOCATION (decl
),
5229 "uninitialized variable %qD in %<constexpr%> function",
5231 cp_function_chain
->invalid_constexpr
= true;
5234 if (CLASS_TYPE_P (type
))
5236 tree defaulted_ctor
;
5238 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5239 "%q#T has no user-provided default constructor", type
);
5240 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5242 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5243 "constructor is not user-provided because it is "
5244 "explicitly defaulted in the class body");
5245 inform (0, "and the implicitly-defined constructor does not "
5246 "initialize %q+#D", field
);
5251 /* Structure holding the current initializer being processed by reshape_init.
5252 CUR is a pointer to the current element being processed, END is a pointer
5253 after the last element present in the initializer. */
5254 typedef struct reshape_iterator_t
5256 constructor_elt
*cur
;
5257 constructor_elt
*end
;
5260 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5262 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5263 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5264 initialized. If there are no more such fields, the return value
5268 next_initializable_field (tree field
)
5271 && (TREE_CODE (field
) != FIELD_DECL
5272 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5273 || DECL_ARTIFICIAL (field
)))
5274 field
= DECL_CHAIN (field
);
5279 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5280 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5281 INTEGER_CST representing the size of the array minus one (the maximum index),
5282 or NULL_TREE if the array was declared without specifying the size. D is
5283 the iterator within the constructor. */
5286 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5287 tsubst_flags_t complain
)
5290 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5291 unsigned HOST_WIDE_INT max_index_cst
= 0;
5292 unsigned HOST_WIDE_INT index
;
5294 /* The initializer for an array is always a CONSTRUCTOR. */
5295 new_init
= build_constructor (init_list_type_node
, NULL
);
5299 /* Minus 1 is used for zero sized arrays. */
5300 if (integer_all_onesp (max_index
))
5303 if (tree_fits_uhwi_p (max_index
))
5304 max_index_cst
= tree_to_uhwi (max_index
);
5305 /* sizetype is sign extended, not zero extended. */
5307 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5310 /* Loop until there are no more initializers. */
5312 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5316 constructor_elt
*old_cur
= d
->cur
;
5318 check_array_designated_initializer (d
->cur
, index
);
5319 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5321 if (elt_init
== error_mark_node
)
5322 return error_mark_node
;
5323 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5324 size_int (index
), elt_init
);
5325 if (!TREE_CONSTANT (elt_init
))
5326 TREE_CONSTANT (new_init
) = false;
5328 /* This can happen with an invalid initializer (c++/54501). */
5329 if (d
->cur
== old_cur
&& !sized_array_p
)
5336 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5337 Parameters are the same of reshape_init_r. */
5340 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5342 tree max_index
= NULL_TREE
;
5344 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5346 if (TYPE_DOMAIN (type
))
5347 max_index
= array_type_nelts (type
);
5349 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5352 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5353 Parameters are the same of reshape_init_r. */
5356 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5358 tree max_index
= NULL_TREE
;
5360 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5362 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5364 tree value
= d
->cur
->value
;
5365 if (!same_type_p (TREE_TYPE (value
), type
))
5367 if (complain
& tf_error
)
5368 error ("invalid type %qT as initializer for a vector of type %qT",
5369 TREE_TYPE (d
->cur
->value
), type
);
5370 value
= error_mark_node
;
5376 /* For a vector, we initialize it as an array of the appropriate size. */
5377 if (TREE_CODE (type
) == VECTOR_TYPE
)
5378 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5380 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5383 /* Subroutine of reshape_init_r, processes the initializers for classes
5384 or union. Parameters are the same of reshape_init_r. */
5387 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5388 tsubst_flags_t complain
)
5393 gcc_assert (CLASS_TYPE_P (type
));
5395 /* The initializer for a class is always a CONSTRUCTOR. */
5396 new_init
= build_constructor (init_list_type_node
, NULL
);
5397 field
= next_initializable_field (TYPE_FIELDS (type
));
5403 An initializer for an aggregate member that is an
5404 empty class shall have the form of an empty
5405 initializer-list {}. */
5406 if (!first_initializer_p
)
5408 if (complain
& tf_error
)
5409 error ("initializer for %qT must be brace-enclosed", type
);
5410 return error_mark_node
;
5415 /* Loop through the initializable fields, gathering initializers. */
5416 while (d
->cur
!= d
->end
)
5419 constructor_elt
*old_cur
= d
->cur
;
5421 /* Handle designated initializers, as an extension. */
5424 if (d
->cur
->index
== error_mark_node
)
5425 return error_mark_node
;
5427 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5428 /* We already reshaped this. */
5429 gcc_assert (d
->cur
->index
== field
);
5430 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5431 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5434 if (complain
& tf_error
)
5435 error ("%<[%E] =%> used in a GNU-style designated initializer"
5436 " for class %qT", d
->cur
->index
, type
);
5437 return error_mark_node
;
5440 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5442 if (complain
& tf_error
)
5443 error ("%qT has no non-static data member named %qD", type
,
5445 return error_mark_node
;
5449 /* If we processed all the member of the class, we are done. */
5453 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5454 /*first_initializer_p=*/false, complain
);
5455 if (field_init
== error_mark_node
)
5456 return error_mark_node
;
5458 if (d
->cur
== old_cur
&& d
->cur
->index
)
5460 /* This can happen with an invalid initializer for a flexible
5461 array member (c++/54441). */
5462 if (complain
& tf_error
)
5463 error ("invalid initializer for %q#D", field
);
5464 return error_mark_node
;
5467 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5471 When a union is initialized with a brace-enclosed
5472 initializer, the braces shall only contain an
5473 initializer for the first member of the union. */
5474 if (TREE_CODE (type
) == UNION_TYPE
)
5477 field
= next_initializable_field (DECL_CHAIN (field
));
5483 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5484 designators are not valid; either complain or return true to indicate
5485 that reshape_init_r should return error_mark_node. */
5488 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5492 if (complain
& tf_error
)
5493 error ("C99 designator %qE outside aggregate initializer",
5501 /* Subroutine of reshape_init, which processes a single initializer (part of
5502 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5503 iterator within the CONSTRUCTOR which points to the initializer to process.
5504 FIRST_INITIALIZER_P is true if this is the first initializer of the
5505 outermost CONSTRUCTOR node. */
5508 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5509 tsubst_flags_t complain
)
5511 tree init
= d
->cur
->value
;
5513 if (error_operand_p (init
))
5514 return error_mark_node
;
5516 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5517 && has_designator_problem (d
, complain
))
5518 return error_mark_node
;
5520 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5522 /* A complex type can be initialized from one or two initializers,
5523 but braces are not elided. */
5525 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5527 if (CONSTRUCTOR_NELTS (init
) > 2)
5529 if (complain
& tf_error
)
5530 error ("too many initializers for %qT", type
);
5532 return error_mark_node
;
5535 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5537 vec
<constructor_elt
, va_gc
> *v
= 0;
5538 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5539 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5540 if (has_designator_problem (d
, complain
))
5541 return error_mark_node
;
5543 init
= build_constructor (init_list_type_node
, v
);
5548 /* A non-aggregate type is always initialized with a single
5550 if (!CP_AGGREGATE_TYPE_P (type
))
5552 /* It is invalid to initialize a non-aggregate type with a
5553 brace-enclosed initializer before C++0x.
5554 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5555 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5556 a CONSTRUCTOR (with a record type). */
5557 if (TREE_CODE (init
) == CONSTRUCTOR
5558 /* Don't complain about a capture-init. */
5559 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5560 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5562 if (SCALAR_TYPE_P (type
))
5564 if (cxx_dialect
< cxx11
5565 /* Isn't value-initialization. */
5566 || CONSTRUCTOR_NELTS (init
) > 0)
5568 if (complain
& tf_error
)
5569 error ("braces around scalar initializer for type %qT",
5571 init
= error_mark_node
;
5575 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5582 /* "If T is a class type and the initializer list has a single element of
5583 type cv U, where U is T or a class derived from T, the object is
5584 initialized from that element." Even if T is an aggregate. */
5585 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5586 && first_initializer_p
5587 && d
->end
- d
->cur
== 1
5588 && reference_related_p (type
, TREE_TYPE (init
)))
5596 All implicit type conversions (clause _conv_) are considered when
5597 initializing the aggregate member with an initializer from an
5598 initializer-list. If the initializer can initialize a member,
5599 the member is initialized. Otherwise, if the member is itself a
5600 non-empty subaggregate, brace elision is assumed and the
5601 initializer is considered for the initialization of the first
5602 member of the subaggregate. */
5603 if (TREE_CODE (init
) != CONSTRUCTOR
5604 /* But don't try this for the first initializer, since that would be
5605 looking through the outermost braces; A a2 = { a1 }; is not a
5606 valid aggregate initialization. */
5607 && !first_initializer_p
5608 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5609 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5616 /* [dcl.init.string]
5618 A char array (whether plain char, signed char, or unsigned char)
5619 can be initialized by a string-literal (optionally enclosed in
5620 braces); a wchar_t array can be initialized by a wide
5621 string-literal (optionally enclosed in braces). */
5622 if (TREE_CODE (type
) == ARRAY_TYPE
5623 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5625 tree str_init
= init
;
5627 /* Strip one level of braces if and only if they enclose a single
5628 element (as allowed by [dcl.init.string]). */
5629 if (!first_initializer_p
5630 && TREE_CODE (str_init
) == CONSTRUCTOR
5631 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5633 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5636 /* If it's a string literal, then it's the initializer for the array
5637 as a whole. Otherwise, continue with normal initialization for
5638 array types (one value per array element). */
5639 if (TREE_CODE (str_init
) == STRING_CST
)
5641 if (has_designator_problem (d
, complain
))
5642 return error_mark_node
;
5648 /* The following cases are about aggregates. If we are not within a full
5649 initializer already, and there is not a CONSTRUCTOR, it means that there
5650 is a missing set of braces (that is, we are processing the case for
5651 which reshape_init exists). */
5652 if (!first_initializer_p
)
5654 if (TREE_CODE (init
) == CONSTRUCTOR
)
5656 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5657 /* There is no need to reshape pointer-to-member function
5658 initializers, as they are always constructed correctly
5659 by the front end. */
5661 else if (COMPOUND_LITERAL_P (init
))
5662 /* For a nested compound literal, there is no need to reshape since
5663 brace elision is not allowed. Even if we decided to allow it,
5664 we should add a call to reshape_init in finish_compound_literal,
5665 before calling digest_init, so changing this code would still
5666 not be necessary. */
5667 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5671 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5672 return reshape_init (type
, init
, complain
);
5676 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5680 /* Dispatch to specialized routines. */
5681 if (CLASS_TYPE_P (type
))
5682 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5683 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5684 return reshape_init_array (type
, d
, complain
);
5685 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5686 return reshape_init_vector (type
, d
, complain
);
5691 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5692 brace-enclosed aggregate initializer.
5694 INIT is the CONSTRUCTOR containing the list of initializers describing
5695 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5696 It may not presently match the shape of the TYPE; for example:
5698 struct S { int a; int b; };
5699 struct S a[] = { 1, 2, 3, 4 };
5701 Here INIT will hold a vector of four elements, rather than a
5702 vector of two elements, each itself a vector of two elements. This
5703 routine transforms INIT from the former form into the latter. The
5704 revised CONSTRUCTOR node is returned. */
5707 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5709 vec
<constructor_elt
, va_gc
> *v
;
5713 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5715 v
= CONSTRUCTOR_ELTS (init
);
5717 /* An empty constructor does not need reshaping, and it is always a valid
5719 if (vec_safe_is_empty (v
))
5722 /* Recurse on this CONSTRUCTOR. */
5724 d
.end
= d
.cur
+ v
->length ();
5726 new_init
= reshape_init_r (type
, &d
, true, complain
);
5727 if (new_init
== error_mark_node
)
5728 return error_mark_node
;
5730 /* Make sure all the element of the constructor were used. Otherwise,
5731 issue an error about exceeding initializers. */
5734 if (complain
& tf_error
)
5735 error ("too many initializers for %qT", type
);
5737 return error_mark_node
;
5743 /* Verify array initializer. Returns true if errors have been reported. */
5746 check_array_initializer (tree decl
, tree type
, tree init
)
5748 tree element_type
= TREE_TYPE (type
);
5750 /* The array type itself need not be complete, because the
5751 initializer may tell us how many elements are in the array.
5752 But, the elements of the array must be complete. */
5753 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5756 error ("elements of array %q#D have incomplete type", decl
);
5758 error ("elements of array %q#T have incomplete type", type
);
5761 /* A compound literal can't have variable size. */
5763 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5764 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5766 error ("variable-sized compound literal");
5772 /* Subroutine of check_initializer; args are passed down from that function.
5773 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5776 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5779 gcc_assert (stmts_are_full_exprs_p ());
5780 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5783 /* Verify INIT (the initializer for DECL), and record the
5784 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5785 grok_reference_init.
5787 If the return value is non-NULL, it is an expression that must be
5788 evaluated dynamically to initialize DECL. */
5791 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5793 tree type
= TREE_TYPE (decl
);
5794 tree init_code
= NULL
;
5797 /* Things that are going to be initialized need to have complete
5799 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5801 if (DECL_HAS_VALUE_EXPR_P (decl
))
5803 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5804 it doesn't have storage to be initialized. */
5805 gcc_assert (init
== NULL_TREE
);
5809 if (type
== error_mark_node
)
5810 /* We will have already complained. */
5813 if (TREE_CODE (type
) == ARRAY_TYPE
)
5815 if (check_array_initializer (decl
, type
, init
))
5818 else if (!COMPLETE_TYPE_P (type
))
5820 error ("%q#D has incomplete type", decl
);
5821 TREE_TYPE (decl
) = error_mark_node
;
5825 /* There is no way to make a variable-sized class type in GNU C++. */
5826 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5828 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5830 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5831 if (SCALAR_TYPE_P (type
))
5835 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5836 init
= build_zero_init (type
, NULL_TREE
, false);
5838 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5840 error ("scalar object %qD requires one element in initializer",
5842 TREE_TYPE (decl
) = error_mark_node
;
5848 if (TREE_CODE (decl
) == CONST_DECL
)
5850 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5852 DECL_INITIAL (decl
) = init
;
5854 gcc_assert (init
!= NULL_TREE
);
5857 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5859 else if (init
|| type_build_ctor_call (type
)
5860 || TREE_CODE (type
) == REFERENCE_TYPE
)
5862 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5864 init
= grok_reference_init (decl
, type
, init
, flags
);
5865 flags
|= LOOKUP_ALREADY_DIGESTED
;
5868 check_for_uninitialized_const_var (decl
);
5869 /* Do not reshape constructors of vectors (they don't need to be
5871 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5873 if (is_std_init_list (type
))
5875 init
= perform_implicit_conversion (type
, init
,
5876 tf_warning_or_error
);
5877 flags
|= LOOKUP_ALREADY_DIGESTED
;
5879 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5881 /* Don't reshape if the class has constructors. */
5882 if (cxx_dialect
== cxx98
)
5883 error ("in C++98 %qD must be initialized by constructor, "
5887 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5889 error ("opaque vector types cannot be initialized");
5890 init
= error_mark_node
;
5894 init
= reshape_init (type
, init
, tf_warning_or_error
);
5895 flags
|= LOOKUP_NO_NARROWING
;
5898 else if (TREE_CODE (init
) == TREE_LIST
5899 && TREE_TYPE (init
) != unknown_type_node
5900 && !MAYBE_CLASS_TYPE_P (type
))
5902 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5904 /* We get here with code like `int a (2);' */
5905 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5906 tf_warning_or_error
);
5909 /* If DECL has an array type without a specific bound, deduce the
5910 array size from the initializer. */
5911 maybe_deduce_size_from_array_init (decl
, init
);
5912 type
= TREE_TYPE (decl
);
5913 if (type
== error_mark_node
)
5916 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5917 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5918 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5919 && CP_AGGREGATE_TYPE_P (type
)
5920 && (CLASS_TYPE_P (type
)
5921 || !TYPE_NEEDS_CONSTRUCTING (type
)
5922 || type_has_extended_temps (type
))))
5924 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5926 /* A constructor call is a non-trivial initializer even if
5927 it isn't explicitly written. */
5928 if (TREE_SIDE_EFFECTS (init_code
))
5929 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5931 /* If this is a constexpr initializer, expand_default_init will
5932 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5933 case, pull the initializer back out and pass it down into
5934 store_init_value. */
5935 while (TREE_CODE (init_code
) == EXPR_STMT
5936 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5937 init_code
= TREE_OPERAND (init_code
, 0);
5938 if (TREE_CODE (init_code
) == INIT_EXPR
)
5940 init
= TREE_OPERAND (init_code
, 1);
5941 init_code
= NULL_TREE
;
5942 /* Don't call digest_init; it's unnecessary and will complain
5943 about aggregate initialization of non-aggregate classes. */
5944 flags
|= LOOKUP_ALREADY_DIGESTED
;
5946 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5948 /* Declared constexpr, but no suitable initializer; massage
5949 init appropriately so we can pass it into store_init_value
5951 if (CLASS_TYPE_P (type
)
5952 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5954 init
= build_functional_cast (type
, init
, tf_none
);
5955 if (TREE_CODE (init
) == TARGET_EXPR
)
5956 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5958 init_code
= NULL_TREE
;
5964 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5966 /* In aggregate initialization of a variable, each element
5967 initialization is a full-expression because there is no
5968 enclosing expression. */
5969 gcc_assert (stmts_are_full_exprs_p ());
5971 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5973 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5974 && DECL_INITIAL (decl
)
5975 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5976 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5977 warning (0, "array %qD initialized by parenthesized string literal %qE",
5978 decl
, DECL_INITIAL (decl
));
5984 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5985 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5986 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5987 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5990 check_for_uninitialized_const_var (decl
);
5993 if (init
&& init
!= error_mark_node
)
5994 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5998 /* We might have set these in cp_finish_decl. */
5999 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6000 TREE_CONSTANT (decl
) = false;
6003 if (init_code
&& DECL_IN_AGGR_P (decl
))
6005 static int explained
= 0;
6007 if (cxx_dialect
< cxx11
)
6008 error ("initializer invalid for static member with constructor");
6010 error ("non-constant in-class initialization invalid for static "
6011 "member %qD", decl
);
6014 inform (input_location
,
6015 "(an out of class initialization is required)");
6024 /* If DECL is not a local variable, give it RTL. */
6027 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6029 int toplev
= toplevel_bindings_p ();
6031 const char *filename
;
6033 /* Set the DECL_ASSEMBLER_NAME for the object. */
6036 /* The `register' keyword, when used together with an
6037 asm-specification, indicates that the variable should be
6038 placed in a particular register. */
6039 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6041 set_user_assembler_name (decl
, asmspec
);
6042 DECL_HARD_REGISTER (decl
) = 1;
6046 if (TREE_CODE (decl
) == FUNCTION_DECL
6047 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6048 set_builtin_user_assembler_name (decl
, asmspec
);
6049 set_user_assembler_name (decl
, asmspec
);
6053 /* Handle non-variables up front. */
6056 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6060 /* If we see a class member here, it should be a static data
6062 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6064 gcc_assert (TREE_STATIC (decl
));
6065 /* An in-class declaration of a static data member should be
6066 external; it is only a declaration, and not a definition. */
6067 if (init
== NULL_TREE
)
6068 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6071 /* We don't create any RTL for local variables. */
6072 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6075 /* We defer emission of local statics until the corresponding
6076 DECL_EXPR is expanded. */
6077 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6079 /* We try to defer namespace-scope static constants so that they are
6080 not emitted into the object file unnecessarily. */
6081 filename
= LOCATION_FILE (input_location
);
6082 if (!DECL_VIRTUAL_P (decl
)
6083 && TREE_READONLY (decl
)
6084 && DECL_INITIAL (decl
) != NULL_TREE
6085 && DECL_INITIAL (decl
) != error_mark_node
6087 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
6089 && !TREE_PUBLIC (decl
))
6091 /* Fool with the linkage of static consts according to #pragma
6093 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
6094 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
6096 TREE_PUBLIC (decl
) = 1;
6097 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
6102 /* Likewise for template instantiations. */
6103 else if (DECL_LANG_SPECIFIC (decl
)
6104 && DECL_IMPLICIT_INSTANTIATION (decl
))
6107 /* If we're not deferring, go ahead and assemble the variable. */
6109 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6112 /* walk_tree helper for wrap_temporary_cleanups, below. */
6115 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6117 /* Stop at types or full-expression boundaries. */
6118 if (TYPE_P (*stmt_p
)
6119 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6125 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6127 tree guard
= (tree
)data
;
6128 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6130 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6131 /* Tell honor_protect_cleanup_actions to handle this as a separate
6133 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6135 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6141 /* We're initializing a local variable which has a cleanup GUARD. If there
6142 are any temporaries used in the initializer INIT of this variable, we
6143 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6144 variable will be cleaned up properly if one of them throws.
6146 Unfortunately, there's no way to express this properly in terms of
6147 nesting, as the regions for the temporaries overlap the region for the
6148 variable itself; if there are two temporaries, the variable needs to be
6149 the first thing destroyed if either of them throws. However, we only
6150 want to run the variable's cleanup if it actually got constructed. So
6151 we need to guard the temporary cleanups with the variable's cleanup if
6152 they are run on the normal path, but not if they are run on the
6153 exceptional path. We implement this by telling
6154 honor_protect_cleanup_actions to strip the variable cleanup from the
6155 exceptional path. */
6158 wrap_temporary_cleanups (tree init
, tree guard
)
6160 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6163 /* Generate code to initialize DECL (a local variable). */
6166 initialize_local_var (tree decl
, tree init
)
6168 tree type
= TREE_TYPE (decl
);
6172 gcc_assert (VAR_P (decl
)
6173 || TREE_CODE (decl
) == RESULT_DECL
);
6174 gcc_assert (!TREE_STATIC (decl
));
6176 if (DECL_SIZE (decl
) == NULL_TREE
)
6178 /* If we used it already as memory, it must stay in memory. */
6179 DECL_INITIAL (decl
) = NULL_TREE
;
6180 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6184 if (type
== error_mark_node
)
6187 /* Compute and store the initial value. */
6188 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6189 if (TREE_USED (type
))
6190 DECL_READ_P (decl
) = 1;
6192 /* Generate a cleanup, if necessary. */
6193 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6195 /* Perform the initialization. */
6198 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6199 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6200 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6202 /* Stick simple initializers in DECL_INITIAL so that
6203 -Wno-init-self works (c++/34772). */
6204 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6205 DECL_INITIAL (decl
) = rinit
;
6207 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6211 warning_at (DECL_SOURCE_LOCATION (decl
),
6213 "reference %qD is initialized with itself", decl
);
6218 int saved_stmts_are_full_exprs_p
;
6220 /* If we're only initializing a single object, guard the
6221 destructors of any temporaries used in its initializer with
6222 its destructor. This isn't right for arrays because each
6223 element initialization is a full-expression. */
6224 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6225 wrap_temporary_cleanups (init
, cleanup
);
6227 gcc_assert (building_stmt_list_p ());
6228 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6229 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6230 finish_expr_stmt (init
);
6231 current_stmt_tree ()->stmts_are_full_exprs_p
=
6232 saved_stmts_are_full_exprs_p
;
6236 /* Set this to 0 so we can tell whether an aggregate which was
6237 initialized was ever used. Don't do this if it has a
6238 destructor, so we don't complain about the 'resource
6239 allocation is initialization' idiom. Now set
6240 attribute((unused)) on types so decls of that type will be
6241 marked used. (see TREE_USED, above.) */
6242 if (TYPE_NEEDS_CONSTRUCTING (type
)
6244 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6245 && DECL_NAME (decl
))
6246 TREE_USED (decl
) = 0;
6247 else if (already_used
)
6248 TREE_USED (decl
) = 1;
6251 finish_decl_cleanup (decl
, cleanup
);
6254 /* DECL is a VAR_DECL for a compiler-generated variable with static
6255 storage duration (like a virtual table) whose initializer is a
6256 compile-time constant. Initialize the variable and provide it to the
6260 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6263 gcc_assert (DECL_ARTIFICIAL (decl
));
6264 init
= build_constructor (TREE_TYPE (decl
), v
);
6265 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6266 DECL_INITIAL (decl
) = init
;
6267 DECL_INITIALIZED_P (decl
) = 1;
6268 determine_visibility (decl
);
6269 layout_var_decl (decl
);
6270 maybe_commonize_var (decl
);
6271 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6274 /* INIT is the initializer for a variable, as represented by the
6275 parser. Returns true iff INIT is type-dependent. */
6278 type_dependent_init_p (tree init
)
6280 if (TREE_CODE (init
) == TREE_LIST
)
6281 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6282 return any_type_dependent_elements_p (init
);
6283 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6284 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6286 vec
<constructor_elt
, va_gc
> *elts
;
6290 elts
= CONSTRUCTOR_ELTS (init
);
6291 nelts
= vec_safe_length (elts
);
6292 for (i
= 0; i
< nelts
; ++i
)
6293 if (type_dependent_init_p ((*elts
)[i
].value
))
6297 /* It must be a simple expression, e.g., int i = 3; */
6298 return type_dependent_expression_p (init
);
6303 /* INIT is the initializer for a variable, as represented by the
6304 parser. Returns true iff INIT is value-dependent. */
6307 value_dependent_init_p (tree init
)
6309 if (TREE_CODE (init
) == TREE_LIST
)
6310 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6311 return any_value_dependent_elements_p (init
);
6312 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6313 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6315 vec
<constructor_elt
, va_gc
> *elts
;
6319 elts
= CONSTRUCTOR_ELTS (init
);
6320 nelts
= vec_safe_length (elts
);
6321 for (i
= 0; i
< nelts
; ++i
)
6322 if (value_dependent_init_p ((*elts
)[i
].value
))
6326 /* It must be a simple expression, e.g., int i = 3; */
6327 return value_dependent_expression_p (init
);
6332 /* Finish processing of a declaration;
6333 install its line number and initial value.
6334 If the length of an array type is not known before,
6335 it must be determined now, from the initial value, or it is an error.
6337 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6338 true, then INIT is an integral constant expression.
6340 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6341 if the (init) syntax was used. */
6344 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6345 tree asmspec_tree
, int flags
)
6348 vec
<tree
, va_gc
> *cleanups
= NULL
;
6349 const char *asmspec
= NULL
;
6350 int was_readonly
= 0;
6351 bool var_definition_p
= false;
6354 if (decl
== error_mark_node
)
6359 error ("assignment (not initialization) in declaration");
6363 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6364 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6365 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6367 type
= TREE_TYPE (decl
);
6368 if (type
== error_mark_node
)
6371 /* If a name was specified, get the string. */
6372 if (at_namespace_scope_p ())
6373 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6374 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6375 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6377 if (current_class_type
6378 && CP_DECL_CONTEXT (decl
) == current_class_type
6379 && TYPE_BEING_DEFINED (current_class_type
)
6380 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6381 && (DECL_INITIAL (decl
) || init
))
6382 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6384 if (TREE_CODE (decl
) != FUNCTION_DECL
6385 && (auto_node
= type_uses_auto (type
)))
6388 if (init
== NULL_TREE
)
6390 if (DECL_LANG_SPECIFIC (decl
)
6391 && DECL_TEMPLATE_INSTANTIATION (decl
)
6392 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6394 /* init is null because we're deferring instantiating the
6395 initializer until we need it. Well, we need it now. */
6396 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6400 error ("declaration of %q#D has no initializer", decl
);
6401 TREE_TYPE (decl
) = error_mark_node
;
6405 if (TREE_CODE (d_init
) == TREE_LIST
)
6406 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6407 tf_warning_or_error
);
6408 d_init
= resolve_nondeduced_context (d_init
);
6409 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6411 if (type
== error_mark_node
)
6413 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6416 if (!ensure_literal_type_for_constexpr_object (decl
))
6417 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6420 && DECL_CLASS_SCOPE_P (decl
)
6421 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6422 check_static_variable_definition (decl
, type
);
6424 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6427 if (init
== ridpointers
[(int)RID_DELETE
])
6429 /* FIXME check this is 1st decl. */
6430 DECL_DELETED_FN (decl
) = 1;
6431 DECL_DECLARED_INLINE_P (decl
) = 1;
6432 DECL_INITIAL (decl
) = error_mark_node
;
6433 FOR_EACH_CLONE (clone
, decl
)
6435 DECL_DELETED_FN (clone
) = 1;
6436 DECL_DECLARED_INLINE_P (clone
) = 1;
6437 DECL_INITIAL (clone
) = error_mark_node
;
6441 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6443 if (defaultable_fn_check (decl
))
6444 DECL_DEFAULTED_FN (decl
) = 1;
6446 DECL_INITIAL (decl
) = NULL_TREE
;
6450 if (init
&& VAR_P (decl
))
6452 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6453 /* If DECL is a reference, then we want to know whether init is a
6454 reference constant; init_const_expr_p as passed tells us whether
6455 it's an rvalue constant. */
6456 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6457 init_const_expr_p
= potential_constant_expression (init
);
6458 if (init_const_expr_p
)
6460 /* Set these flags now for templates. We'll update the flags in
6461 store_init_value for instantiations. */
6462 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6463 if (decl_maybe_constant_var_p (decl
))
6464 TREE_CONSTANT (decl
) = 1;
6468 if (processing_template_decl
)
6470 bool type_dependent_p
;
6472 /* Add this declaration to the statement-tree. */
6473 if (at_function_scope_p ())
6474 add_decl_expr (decl
);
6476 type_dependent_p
= dependent_type_p (type
);
6478 if (check_for_bare_parameter_packs (init
))
6481 DECL_INITIAL (decl
) = NULL_TREE
;
6484 /* Generally, initializers in templates are expanded when the
6485 template is instantiated. But, if DECL is a variable constant
6486 then it can be used in future constant expressions, so its value
6487 must be available. */
6489 if (!VAR_P (decl
) || dependent_type_p (type
))
6490 /* We can't do anything if the decl has dependent type. */;
6492 && init_const_expr_p
6493 && !type_dependent_p
6494 && TREE_CODE (type
) != REFERENCE_TYPE
6495 && decl_maybe_constant_var_p (decl
)
6496 && !type_dependent_init_p (init
)
6497 && !value_dependent_init_p (init
))
6499 /* This variable seems to be a non-dependent constant, so process
6500 its initializer. If check_initializer returns non-null the
6501 initialization wasn't constant after all. */
6503 cleanups
= make_tree_vector ();
6504 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6505 if (init_code
== NULL_TREE
)
6507 release_tree_vector (cleanups
);
6509 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6511 /* Deduce array size even if the initializer is dependent. */
6512 maybe_deduce_size_from_array_init (decl
, init
);
6513 /* And complain about multiple initializers. */
6514 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6515 && !MAYBE_CLASS_TYPE_P (type
))
6516 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6517 tf_warning_or_error
);
6521 DECL_INITIAL (decl
) = init
;
6525 /* Just store non-static data member initializers for later. */
6526 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6527 DECL_INITIAL (decl
) = init
;
6529 /* Take care of TYPE_DECLs up front. */
6530 if (TREE_CODE (decl
) == TYPE_DECL
)
6532 if (type
!= error_mark_node
6533 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6535 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6536 warning (0, "shadowing previous type declaration of %q#D", decl
);
6537 set_identifier_type_value (DECL_NAME (decl
), decl
);
6540 /* If we have installed this as the canonical typedef for this
6541 type, and that type has not been defined yet, delay emitting
6542 the debug information for it, as we will emit it later. */
6543 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6544 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6545 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6547 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6552 /* A reference will be modified here, as it is initialized. */
6553 if (! DECL_EXTERNAL (decl
)
6554 && TREE_READONLY (decl
)
6555 && TREE_CODE (type
) == REFERENCE_TYPE
)
6558 TREE_READONLY (decl
) = 0;
6563 /* If this is a local variable that will need a mangled name,
6564 register it now. We must do this before processing the
6565 initializer for the variable, since the initialization might
6566 require a guard variable, and since the mangled name of the
6567 guard variable will depend on the mangled name of this
6569 if (DECL_FUNCTION_SCOPE_P (decl
)
6570 && TREE_STATIC (decl
)
6571 && !DECL_ARTIFICIAL (decl
))
6573 push_local_name (decl
);
6574 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6575 || DECL_DESTRUCTOR_P (current_function_decl
))
6576 /* Normally local_decls is populated during GIMPLE lowering,
6577 but [cd]tors are never actually compiled directly. We need
6578 to put statics on the list so we can deal with the label
6579 address extension. FIXME. */
6580 add_local_decl (cfun
, decl
);
6583 /* Convert the initializer to the type of DECL, if we have not
6584 already initialized DECL. */
6585 if (!DECL_INITIALIZED_P (decl
)
6586 /* If !DECL_EXTERNAL then DECL is being defined. In the
6587 case of a static data member initialized inside the
6588 class-specifier, there can be an initializer even if DECL
6589 is *not* defined. */
6590 && (!DECL_EXTERNAL (decl
) || init
))
6592 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6595 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6596 /* Allow libjava/prims.cc define primitive classes. */
6597 if (init
!= NULL_TREE
6598 || jclass
== NULL_TREE
6599 || TREE_CODE (jclass
) != TYPE_DECL
6600 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6601 || !same_type_ignoring_top_level_qualifiers_p
6602 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6603 error ("Java object %qD not allocated with %<new%>", decl
);
6606 cleanups
= make_tree_vector ();
6607 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6613 The memory occupied by any object of static storage
6614 duration is zero-initialized at program startup before
6615 any other initialization takes place.
6617 We cannot create an appropriate initializer until after
6618 the type of DECL is finalized. If DECL_INITIAL is set,
6619 then the DECL is statically initialized, and any
6620 necessary zero-initialization has already been performed. */
6621 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6622 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6623 /*nelts=*/NULL_TREE
,
6624 /*static_storage_p=*/true);
6625 /* Remember that the initialization for this variable has
6627 DECL_INITIALIZED_P (decl
) = 1;
6628 /* This declaration is the definition of this variable,
6629 unless we are initializing a static data member within
6630 the class specifier. */
6631 if (!DECL_EXTERNAL (decl
))
6632 var_definition_p
= true;
6634 /* If the variable has an array type, lay out the type, even if
6635 there is no initializer. It is valid to index through the
6636 array, and we must get TYPE_ALIGN set correctly on the array
6638 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6641 if (TREE_STATIC (decl
)
6642 && !at_function_scope_p ()
6643 && current_function_decl
== NULL
)
6644 /* So decl is a global variable or a static member of a
6645 non local class. Record the types it uses
6646 so that we can decide later to emit debug info for them. */
6647 record_types_used_by_current_var_decl (decl
);
6649 else if (TREE_CODE (decl
) == FIELD_DECL
6650 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6651 error ("non-static data member %qD has Java class type", decl
);
6653 /* Add this declaration to the statement-tree. This needs to happen
6654 after the call to check_initializer so that the DECL_EXPR for a
6655 reference temp is added before the DECL_EXPR for the reference itself. */
6656 if (DECL_FUNCTION_SCOPE_P (decl
))
6658 /* If we're building a variable sized type, and we might be
6659 reachable other than via the top of the current binding
6660 level, then create a new BIND_EXPR so that we deallocate
6661 the object at the right time. */
6664 && !TREE_CONSTANT (DECL_SIZE (decl
))
6665 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6668 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6669 TREE_SIDE_EFFECTS (bind
) = 1;
6671 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6673 add_decl_expr (decl
);
6676 /* Let the middle end know about variables and functions -- but not
6677 static data members in uninstantiated class templates. */
6678 if (VAR_OR_FUNCTION_DECL_P (decl
))
6682 layout_var_decl (decl
);
6683 maybe_commonize_var (decl
);
6686 /* This needs to happen after the linkage is set. */
6687 determine_visibility (decl
);
6689 if (var_definition_p
&& TREE_STATIC (decl
))
6691 /* If a TREE_READONLY variable needs initialization
6692 at runtime, it is no longer readonly and we need to
6693 avoid MEM_READONLY_P being set on RTL created for it. */
6696 if (TREE_READONLY (decl
))
6697 TREE_READONLY (decl
) = 0;
6700 else if (was_readonly
)
6701 TREE_READONLY (decl
) = 1;
6703 /* Likewise if it needs destruction. */
6704 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6705 TREE_READONLY (decl
) = 0;
6708 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6710 /* Check for abstractness of the type. Notice that there is no
6711 need to strip array types here since the check for those types
6712 is already done within create_array_type_for_decl. */
6713 abstract_virtuals_error (decl
, type
);
6715 if (TREE_TYPE (decl
) == error_mark_node
)
6716 /* No initialization required. */
6718 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6722 if (init
== ridpointers
[(int)RID_DEFAULT
])
6724 /* An out-of-class default definition is defined at
6725 the point where it is explicitly defaulted. */
6726 if (DECL_DELETED_FN (decl
))
6727 maybe_explain_implicit_delete (decl
);
6728 else if (DECL_INITIAL (decl
) == error_mark_node
)
6729 synthesize_method (decl
);
6732 error ("function %q#D is initialized like a variable", decl
);
6734 /* else no initialization required. */
6736 else if (DECL_EXTERNAL (decl
)
6737 && ! (DECL_LANG_SPECIFIC (decl
)
6738 && DECL_NOT_REALLY_EXTERN (decl
)))
6741 DECL_INITIAL (decl
) = init
;
6743 /* A variable definition. */
6744 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6745 /* Initialize the local variable. */
6746 initialize_local_var (decl
, init
);
6748 /* If a variable is defined, and then a subsequent
6749 definition with external linkage is encountered, we will
6750 get here twice for the same variable. We want to avoid
6751 calling expand_static_init more than once. For variables
6752 that are not static data members, we can call
6753 expand_static_init only when we actually process the
6754 initializer. It is not legal to redeclare a static data
6755 member, so this issue does not arise in that case. */
6756 else if (var_definition_p
&& TREE_STATIC (decl
))
6757 expand_static_init (decl
, init
);
6760 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6761 reference, insert it in the statement-tree now. */
6765 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6766 push_cleanup (decl
, t
, false);
6767 release_tree_vector (cleanups
);
6771 TREE_READONLY (decl
) = 1;
6773 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6776 /* Returns a declaration for a VAR_DECL as if:
6778 extern "C" TYPE NAME;
6780 had been seen. Used to create compiler-generated global
6784 declare_global_var (tree name
, tree type
)
6788 push_to_top_level ();
6789 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6790 TREE_PUBLIC (decl
) = 1;
6791 DECL_EXTERNAL (decl
) = 1;
6792 DECL_ARTIFICIAL (decl
) = 1;
6793 /* If the user has explicitly declared this variable (perhaps
6794 because the code we are compiling is part of a low-level runtime
6795 library), then it is possible that our declaration will be merged
6796 with theirs by pushdecl. */
6797 decl
= pushdecl (decl
);
6798 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6799 pop_from_top_level ();
6804 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6805 if "__cxa_atexit" is not being used) corresponding to the function
6806 to be called when the program exits. */
6809 get_atexit_fn_ptr_type (void)
6813 if (!atexit_fn_ptr_type_node
)
6816 if (flag_use_cxa_atexit
6817 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6818 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6819 arg_type
= ptr_type_node
;
6821 /* The parameter to "atexit" is "void (*)(void)". */
6822 arg_type
= NULL_TREE
;
6824 fn_type
= build_function_type_list (void_type_node
,
6825 arg_type
, NULL_TREE
);
6826 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6829 return atexit_fn_ptr_type_node
;
6832 /* Returns a pointer to the `atexit' function. Note that if
6833 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6834 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6837 get_atexit_node (void)
6843 bool use_aeabi_atexit
;
6848 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6850 /* The declaration for `__cxa_atexit' is:
6852 int __cxa_atexit (void (*)(void *), void *, void *)
6854 We build up the argument types and then the function type
6856 tree argtype0
, argtype1
, argtype2
;
6858 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6859 /* First, build the pointer-to-function type for the first
6861 fn_ptr_type
= get_atexit_fn_ptr_type ();
6862 /* Then, build the rest of the argument types. */
6863 argtype2
= ptr_type_node
;
6864 if (use_aeabi_atexit
)
6866 argtype1
= fn_ptr_type
;
6867 argtype0
= ptr_type_node
;
6871 argtype1
= ptr_type_node
;
6872 argtype0
= fn_ptr_type
;
6874 /* And the final __cxa_atexit type. */
6875 fn_type
= build_function_type_list (integer_type_node
,
6876 argtype0
, argtype1
, argtype2
,
6878 if (use_aeabi_atexit
)
6879 name
= "__aeabi_atexit";
6881 name
= "__cxa_atexit";
6885 /* The declaration for `atexit' is:
6887 int atexit (void (*)());
6889 We build up the argument types and then the function type
6891 fn_ptr_type
= get_atexit_fn_ptr_type ();
6892 /* Build the final atexit type. */
6893 fn_type
= build_function_type_list (integer_type_node
,
6894 fn_ptr_type
, NULL_TREE
);
6898 /* Now, build the function declaration. */
6899 push_lang_context (lang_name_c
);
6900 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6901 mark_used (atexit_fndecl
);
6902 pop_lang_context ();
6903 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6908 /* Like get_atexit_node, but for thread-local cleanups. */
6911 get_thread_atexit_node (void)
6913 /* The declaration for `__cxa_thread_atexit' is:
6915 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6916 tree fn_type
= build_function_type_list (integer_type_node
,
6917 get_atexit_fn_ptr_type (),
6918 ptr_type_node
, ptr_type_node
,
6921 /* Now, build the function declaration. */
6922 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6923 ECF_LEAF
| ECF_NOTHROW
);
6924 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6927 /* Returns the __dso_handle VAR_DECL. */
6930 get_dso_handle_node (void)
6932 if (dso_handle_node
)
6933 return dso_handle_node
;
6935 /* Declare the variable. */
6936 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6939 #ifdef HAVE_GAS_HIDDEN
6940 if (dso_handle_node
!= error_mark_node
)
6942 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6943 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6947 return dso_handle_node
;
6950 /* Begin a new function with internal linkage whose job will be simply
6951 to destroy some particular variable. */
6953 static GTY(()) int start_cleanup_cnt
;
6956 start_cleanup_fn (void)
6961 bool use_cxa_atexit
= flag_use_cxa_atexit
6962 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6964 push_to_top_level ();
6966 /* No need to mangle this. */
6967 push_lang_context (lang_name_c
);
6969 /* Build the name of the function. */
6970 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6971 /* Build the function declaration. */
6972 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6973 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6974 /* It's a function with internal linkage, generated by the
6976 TREE_PUBLIC (fndecl
) = 0;
6977 DECL_ARTIFICIAL (fndecl
) = 1;
6978 /* Make the function `inline' so that it is only emitted if it is
6979 actually needed. It is unlikely that it will be inlined, since
6980 it is only called via a function pointer, but we avoid unnecessary
6981 emissions this way. */
6982 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6983 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6984 /* Build the parameter. */
6989 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6990 DECL_CONTEXT (parmdecl
) = fndecl
;
6991 TREE_USED (parmdecl
) = 1;
6992 DECL_READ_P (parmdecl
) = 1;
6993 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6997 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6999 pop_lang_context ();
7001 return current_function_decl
;
7004 /* Finish the cleanup function begun by start_cleanup_fn. */
7007 end_cleanup_fn (void)
7009 expand_or_defer_fn (finish_function (0));
7011 pop_from_top_level ();
7014 /* Generate code to handle the destruction of DECL, an object with
7015 static storage duration. */
7018 register_dtor_fn (tree decl
)
7025 bool ob_parm
, dso_parm
, use_dtor
;
7026 tree arg0
, arg1
, arg2
;
7029 type
= TREE_TYPE (decl
);
7030 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7033 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7034 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7035 destructor to "__cxa_atexit"; we don't have to build a temporary
7036 function to do the cleanup. */
7037 dso_parm
= (flag_use_cxa_atexit
7038 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7039 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7040 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7045 /* Find the destructor. */
7046 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7047 gcc_assert (idx
>= 0);
7048 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7049 /* Make sure it is accessible. */
7050 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7051 tf_warning_or_error
);
7055 /* Call build_cleanup before we enter the anonymous function so
7056 that any access checks will be done relative to the current
7057 scope, rather than the scope of the anonymous function. */
7058 build_cleanup (decl
);
7060 /* Now start the function. */
7061 cleanup
= start_cleanup_fn ();
7063 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7064 to the original function, rather than the anonymous one. That
7065 will make the back end think that nested functions are in use,
7066 which causes confusion. */
7067 push_deferring_access_checks (dk_no_check
);
7068 fcall
= build_cleanup (decl
);
7069 pop_deferring_access_checks ();
7071 /* Create the body of the anonymous function. */
7072 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7073 finish_expr_stmt (fcall
);
7074 finish_compound_stmt (compound_stmt
);
7078 /* Call atexit with the cleanup function. */
7079 mark_used (cleanup
);
7080 cleanup
= build_address (cleanup
);
7082 if (DECL_THREAD_LOCAL_P (decl
))
7083 atex_node
= get_thread_atexit_node ();
7085 atex_node
= get_atexit_node ();
7089 /* We must convert CLEANUP to the type that "__cxa_atexit"
7091 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7092 /* "__cxa_atexit" will pass the address of DECL to the
7093 cleanup function. */
7095 addr
= build_address (decl
);
7096 /* The declared type of the parameter to "__cxa_atexit" is
7097 "void *". For plain "T*", we could just let the
7098 machinery in cp_build_function_call convert it -- but if the
7099 type is "cv-qualified T *", then we need to convert it
7100 before passing it in, to avoid spurious errors. */
7101 addr
= build_nop (ptr_type_node
, addr
);
7104 /* Since the cleanup functions we build ignore the address
7105 they're given, there's no reason to pass the actual address
7106 in, and, in general, it's cheaper to pass NULL than any
7108 addr
= null_pointer_node
;
7111 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7112 tf_warning_or_error
);
7114 /* Just pass NULL to the dso handle parm if we don't actually
7115 have a DSO handle on this target. */
7116 arg2
= null_pointer_node
;
7122 if (!DECL_THREAD_LOCAL_P (decl
)
7123 && targetm
.cxx
.use_aeabi_atexit ())
7139 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7140 arg0
, arg1
, arg2
, NULL_TREE
);
7143 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7144 is its initializer. Generate code to handle the construction
7145 and destruction of DECL. */
7148 expand_static_init (tree decl
, tree init
)
7150 gcc_assert (VAR_P (decl
));
7151 gcc_assert (TREE_STATIC (decl
));
7153 /* Some variables require no dynamic initialization. */
7155 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7157 /* Make sure the destructor is callable. */
7158 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7162 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7163 && !DECL_FUNCTION_SCOPE_P (decl
))
7166 error ("non-local variable %qD declared %<__thread%> "
7167 "needs dynamic initialization", decl
);
7169 error ("non-local variable %qD declared %<__thread%> "
7170 "has a non-trivial destructor", decl
);
7171 static bool informed
;
7174 inform (DECL_SOURCE_LOCATION (decl
),
7175 "C++11 %<thread_local%> allows dynamic initialization "
7182 if (DECL_FUNCTION_SCOPE_P (decl
))
7184 /* Emit code to perform this initialization but once. */
7185 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7186 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7187 tree guard
, guard_addr
;
7189 /* We don't need thread-safety code for thread-local vars. */
7190 bool thread_guard
= (flag_threadsafe_statics
7191 && !DECL_THREAD_LOCAL_P (decl
));
7193 /* Emit code to perform this initialization but once. This code
7196 static <type> guard;
7197 if (!guard.first_byte) {
7198 if (__cxa_guard_acquire (&guard)) {
7201 // Do initialization.
7202 flag = true; __cxa_guard_release (&guard);
7203 // Register variable for destruction at end of program.
7205 if (!flag) __cxa_guard_abort (&guard);
7209 Note that the `flag' variable is only set to 1 *after* the
7210 initialization is complete. This ensures that an exception,
7211 thrown during the construction, will cause the variable to
7212 reinitialized when we pass through this code again, as per:
7216 If the initialization exits by throwing an exception, the
7217 initialization is not complete, so it will be tried again
7218 the next time control enters the declaration.
7220 This process should be thread-safe, too; multiple threads
7221 should not be able to initialize the variable more than
7224 /* Create the guard variable. */
7225 guard
= get_guard (decl
);
7227 /* This optimization isn't safe on targets with relaxed memory
7228 consistency. On such targets we force synchronization in
7229 __cxa_guard_acquire. */
7230 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7232 /* Begin the conditional initialization. */
7233 if_stmt
= begin_if_stmt ();
7234 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7235 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7240 tree vfntype
= NULL_TREE
;
7241 tree acquire_name
, release_name
, abort_name
;
7242 tree acquire_fn
, release_fn
, abort_fn
;
7243 guard_addr
= build_address (guard
);
7245 acquire_name
= get_identifier ("__cxa_guard_acquire");
7246 release_name
= get_identifier ("__cxa_guard_release");
7247 abort_name
= get_identifier ("__cxa_guard_abort");
7248 acquire_fn
= identifier_global_value (acquire_name
);
7249 release_fn
= identifier_global_value (release_name
);
7250 abort_fn
= identifier_global_value (abort_name
);
7252 acquire_fn
= push_library_fn
7253 (acquire_name
, build_function_type_list (integer_type_node
,
7254 TREE_TYPE (guard_addr
),
7256 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7257 if (!release_fn
|| !abort_fn
)
7258 vfntype
= build_function_type_list (void_type_node
,
7259 TREE_TYPE (guard_addr
),
7262 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7263 ECF_NOTHROW
| ECF_LEAF
);
7265 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7266 ECF_NOTHROW
| ECF_LEAF
);
7268 inner_if_stmt
= begin_if_stmt ();
7269 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7272 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7273 begin
= get_target_expr (boolean_false_node
);
7274 flag
= TARGET_EXPR_SLOT (begin
);
7276 TARGET_EXPR_CLEANUP (begin
)
7277 = build3 (COND_EXPR
, void_type_node
, flag
,
7279 build_call_n (abort_fn
, 1, guard_addr
));
7280 CLEANUP_EH_ONLY (begin
) = 1;
7282 /* Do the initialization itself. */
7283 init
= add_stmt_to_compound (begin
, init
);
7284 init
= add_stmt_to_compound
7285 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7286 init
= add_stmt_to_compound
7287 (init
, build_call_n (release_fn
, 1, guard_addr
));
7290 init
= add_stmt_to_compound (init
, set_guard (guard
));
7292 /* Use atexit to register a function for destroying this static
7294 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7296 finish_expr_stmt (init
);
7300 finish_compound_stmt (inner_then_clause
);
7301 finish_then_clause (inner_if_stmt
);
7302 finish_if_stmt (inner_if_stmt
);
7305 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7307 finish_compound_stmt (then_clause
);
7308 finish_then_clause (if_stmt
);
7309 finish_if_stmt (if_stmt
);
7312 else if (DECL_THREAD_LOCAL_P (decl
))
7313 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7315 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7319 /* Make TYPE a complete type based on INITIAL_VALUE.
7320 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7321 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7322 3 if the initializer list is empty (in pedantic mode). */
7325 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7328 tree type
, elt_type
;
7330 /* Don't get confused by a CONSTRUCTOR for some other type. */
7331 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7332 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7337 unsigned HOST_WIDE_INT i
;
7340 /* An array of character type can be initialized from a
7341 brace-enclosed string constant.
7343 FIXME: this code is duplicated from reshape_init. Probably
7344 we should just call reshape_init here? */
7345 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7346 && TREE_CODE (initial_value
) == CONSTRUCTOR
7347 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7349 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7350 tree value
= (*v
)[0].value
;
7352 if (TREE_CODE (value
) == STRING_CST
7353 && v
->length () == 1)
7354 initial_value
= value
;
7357 /* If any of the elements are parameter packs, we can't actually
7358 complete this type now because the array size is dependent. */
7359 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7361 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7364 if (PACK_EXPANSION_P (value
))
7370 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7372 /* We can create the array before the element type is complete, which
7373 means that we didn't have these two bits set in the original type
7374 either. In completing the type, we are expected to propagate these
7375 bits. See also complete_type which does the same thing for arrays
7378 if (TYPE_DOMAIN (type
))
7380 elt_type
= TREE_TYPE (type
);
7381 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7382 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7383 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7389 /* As above, but either give an error or reject zero-size arrays, depending
7393 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7394 bool do_default
, tsubst_flags_t complain
)
7397 bool sfinae
= !(complain
& tf_error
);
7398 /* In SFINAE context we can't be lenient about zero-size arrays. */
7401 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7407 /* Not an error. */;
7408 else if (failure
== 1)
7409 error ("initializer fails to determine size of %qT", *ptype
);
7410 else if (failure
== 2)
7413 error ("array size missing in %qT", *ptype
);
7415 else if (failure
== 3)
7416 error ("zero-size array %qT", *ptype
);
7417 *ptype
= error_mark_node
;
7422 /* Return zero if something is declared to be a member of type
7423 CTYPE when in the context of CUR_TYPE. STRING is the error
7424 message to print in that case. Otherwise, quietly return 1. */
7427 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7429 if (ctype
&& ctype
!= cur_type
)
7431 if (flags
== DTOR_FLAG
)
7432 error ("destructor for alien class %qT cannot be a member", ctype
);
7434 error ("constructor for alien class %qT cannot be a member", ctype
);
7440 /* Subroutine of `grokdeclarator'. */
7442 /* Generate errors possibly applicable for a given set of specifiers.
7443 This is for ARM $7.1.2. */
7446 bad_specifiers (tree object
,
7447 enum bad_spec_place type
,
7458 error ("%qD declared as a %<virtual%> variable", object
);
7460 error ("%qD declared as an %<inline%> variable", object
);
7462 error ("%<const%> and %<volatile%> function specifiers on "
7463 "%qD invalid in variable declaration", object
);
7467 error ("%qD declared as a %<virtual%> parameter", object
);
7469 error ("%qD declared as an %<inline%> parameter", object
);
7471 error ("%<const%> and %<volatile%> function specifiers on "
7472 "%qD invalid in parameter declaration", object
);
7476 error ("%qD declared as a %<virtual%> type", object
);
7478 error ("%qD declared as an %<inline%> type", object
);
7480 error ("%<const%> and %<volatile%> function specifiers on "
7481 "%qD invalid in type declaration", object
);
7485 error ("%qD declared as a %<virtual%> field", object
);
7487 error ("%qD declared as an %<inline%> field", object
);
7489 error ("%<const%> and %<volatile%> function specifiers on "
7490 "%qD invalid in field declaration", object
);
7496 error ("%q+D declared as a friend", object
);
7498 && (TREE_CODE (object
) == TYPE_DECL
7499 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7500 && !TYPE_REFFN_P (TREE_TYPE (object
))
7501 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7502 error ("%q+D declared with an exception specification", object
);
7505 /* DECL is a member function or static data member and is presently
7506 being defined. Check that the definition is taking place in a
7510 check_class_member_definition_namespace (tree decl
)
7512 /* These checks only apply to member functions and static data
7514 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7515 /* We check for problems with specializations in pt.c in
7516 check_specialization_namespace, where we can issue better
7518 if (processing_specialization
)
7520 /* There are no restrictions on the placement of
7521 explicit instantiations. */
7522 if (processing_explicit_instantiation
)
7526 A member function definition that appears outside of the
7527 class definition shall appear in a namespace scope enclosing
7528 the class definition.
7532 The definition for a static data member shall appear in a
7533 namespace scope enclosing the member's class definition. */
7534 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7535 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7536 decl
, DECL_CONTEXT (decl
));
7539 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7540 METHOD_TYPE for a non-static member function; QUALS are the
7541 cv-qualifiers that apply to the function. */
7544 build_this_parm (tree type
, cp_cv_quals quals
)
7549 cp_cv_quals this_quals
;
7551 if (CLASS_TYPE_P (type
))
7554 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7555 this_type
= build_pointer_type (this_type
);
7558 this_type
= type_of_this_parm (type
);
7559 /* The `this' parameter is implicitly `const'; it cannot be
7561 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7562 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7563 parm
= build_artificial_parm (this_identifier
, qual_type
);
7564 cp_apply_type_quals_to_decl (this_quals
, parm
);
7568 /* DECL is a static member function. Complain if it was declared
7569 with function-cv-quals. */
7572 check_static_quals (tree decl
, cp_cv_quals quals
)
7574 if (quals
!= TYPE_UNQUALIFIED
)
7575 error ("static member function %q#D declared with type qualifiers",
7579 /* Helper function. Replace the temporary this parameter injected
7580 during cp_finish_omp_declare_simd with the real this parameter. */
7583 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7585 tree this_parm
= (tree
) data
;
7586 if (TREE_CODE (*tp
) == PARM_DECL
7587 && DECL_NAME (*tp
) == this_identifier
7588 && *tp
!= this_parm
)
7590 else if (TYPE_P (*tp
))
7595 /* CTYPE is class type, or null if non-class.
7596 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7598 DECLARATOR is the function's name.
7599 PARMS is a chain of PARM_DECLs for the function.
7600 VIRTUALP is truthvalue of whether the function is virtual or not.
7601 FLAGS are to be passed through to `grokclassfn'.
7602 QUALS are qualifiers indicating whether the function is `const'
7604 RAISES is a list of exceptions that this function can raise.
7605 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7606 not look, and -1 if we should not call `grokclassfn' at all.
7608 SFK is the kind of special function (if any) for the new function.
7610 Returns `NULL_TREE' if something goes wrong, after issuing
7611 applicable error messages. */
7614 grokfndecl (tree ctype
,
7618 tree orig_declarator
,
7620 enum overload_flags flags
,
7622 cp_ref_qualifier rqual
,
7629 special_function_kind sfk
,
7634 location_t location
)
7637 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7641 type
= build_ref_qualified_type (type
, rqual
);
7643 type
= build_exception_variant (type
, raises
);
7645 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7647 /* If we have an explicit location, use it, otherwise use whatever
7648 build_lang_decl used (probably input_location). */
7649 if (location
!= UNKNOWN_LOCATION
)
7650 DECL_SOURCE_LOCATION (decl
) = location
;
7652 if (TREE_CODE (type
) == METHOD_TYPE
)
7655 parm
= build_this_parm (type
, quals
);
7656 DECL_CHAIN (parm
) = parms
;
7659 DECL_ARGUMENTS (decl
) = parms
;
7660 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7661 DECL_CONTEXT (t
) = decl
;
7662 /* Propagate volatile out from type to decl. */
7663 if (TYPE_VOLATILE (type
))
7664 TREE_THIS_VOLATILE (decl
) = 1;
7666 /* Setup decl according to sfk. */
7669 case sfk_constructor
:
7670 case sfk_copy_constructor
:
7671 case sfk_move_constructor
:
7672 DECL_CONSTRUCTOR_P (decl
) = 1;
7674 case sfk_destructor
:
7675 DECL_DESTRUCTOR_P (decl
) = 1;
7681 /* If pointers to member functions use the least significant bit to
7682 indicate whether a function is virtual, ensure a pointer
7683 to this function will have that bit clear. */
7684 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7685 && TREE_CODE (type
) == METHOD_TYPE
7686 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7687 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7690 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7694 ("defining explicit specialization %qD in friend declaration",
7698 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7699 tree args
= TREE_OPERAND (orig_declarator
, 1);
7701 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7703 /* Something like `template <class T> friend void f<T>()'. */
7704 error ("invalid use of template-id %qD in declaration "
7705 "of primary template",
7711 /* A friend declaration of the form friend void f<>(). Record
7712 the information in the TEMPLATE_ID_EXPR. */
7713 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7715 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7716 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7718 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7719 if (TREE_PURPOSE (t
)
7720 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7722 error ("default arguments are not allowed in declaration "
7723 "of friend template specialization %qD",
7729 error ("%<inline%> is not allowed in declaration of friend "
7730 "template specialization %qD",
7733 error ("%<constexpr%> is not allowed in declaration of friend "
7734 "template specialization %qD",
7741 /* If this decl has namespace scope, set that up. */
7743 set_decl_namespace (decl
, in_namespace
, friendp
);
7745 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7747 /* `main' and builtins have implicit 'C' linkage. */
7748 if ((MAIN_NAME_P (declarator
)
7749 || (IDENTIFIER_LENGTH (declarator
) > 10
7750 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7751 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7752 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7753 || (targetcm
.cxx_implicit_extern_c
7754 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7755 && current_lang_name
== lang_name_cplusplus
7756 && ctype
== NULL_TREE
7757 && DECL_FILE_SCOPE_P (decl
))
7758 SET_DECL_LANGUAGE (decl
, lang_c
);
7760 /* Should probably propagate const out from type to decl I bet (mrs). */
7763 DECL_STATIC_FUNCTION_P (decl
) = 1;
7764 DECL_CONTEXT (decl
) = ctype
;
7768 DECL_DELETED_FN (decl
) = 1;
7772 DECL_CONTEXT (decl
) = ctype
;
7774 check_class_member_definition_namespace (decl
);
7777 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7779 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7780 error ("cannot declare %<::main%> to be a template");
7782 error ("cannot declare %<::main%> to be inline");
7784 error ("cannot declare %<::main%> to be constexpr");
7786 error ("cannot declare %<::main%> to be static");
7791 /* Members of anonymous types and local classes have no linkage; make
7792 them internal. If a typedef is made later, this will be changed. */
7793 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7794 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7797 if (publicp
&& cxx_dialect
== cxx98
)
7799 /* [basic.link]: A name with no linkage (notably, the name of a class
7800 or enumeration declared in a local scope) shall not be used to
7801 declare an entity with linkage.
7803 DR 757 relaxes this restriction for C++0x. */
7804 no_linkage_error (decl
);
7807 TREE_PUBLIC (decl
) = publicp
;
7810 DECL_INTERFACE_KNOWN (decl
) = 1;
7811 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7814 /* If the declaration was declared inline, mark it as such. */
7817 DECL_DECLARED_INLINE_P (decl
) = 1;
7819 DECL_COMDAT (decl
) = 1;
7822 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7824 DECL_EXTERNAL (decl
) = 1;
7825 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7830 ? G_("static member function %qD cannot have cv-qualifier")
7831 : G_("non-member function %qD cannot have cv-qualifier"),
7833 quals
= TYPE_UNQUALIFIED
;
7839 ? G_("static member function %qD cannot have ref-qualifier")
7840 : G_("non-member function %qD cannot have ref-qualifier"),
7842 rqual
= REF_QUAL_NONE
;
7846 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7847 && !grok_op_properties (decl
, /*complain=*/true))
7849 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7851 bool long_long_unsigned_p
;
7853 const char *suffix
= NULL
;
7854 /* [over.literal]/6: Literal operators shall not have C linkage. */
7855 if (DECL_LANGUAGE (decl
) == lang_c
)
7857 error ("literal operator with C linkage");
7861 if (DECL_NAMESPACE_SCOPE_P (decl
))
7863 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7866 error ("%qD has invalid argument list", decl
);
7870 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7871 if (long_long_unsigned_p
)
7873 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7874 warning (0, "integer suffix %<%s%>"
7875 " shadowed by implementation", suffix
);
7877 else if (long_double_p
)
7879 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7880 warning (0, "floating point suffix %<%s%>"
7881 " shadowed by implementation", suffix
);
7886 error ("%qD must be a non-member function", decl
);
7892 /* Make the init_value nonzero so pushdecl knows this is not
7893 tentative. error_mark_node is replaced later with the BLOCK. */
7894 DECL_INITIAL (decl
) = error_mark_node
;
7896 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7897 TREE_NOTHROW (decl
) = 1;
7899 if (flag_openmp
|| flag_cilkplus
)
7901 /* Adjust "omp declare simd" attributes. */
7902 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7906 for (attr
= ods
; attr
;
7907 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7909 if (TREE_CODE (type
) == METHOD_TYPE
)
7910 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7911 DECL_ARGUMENTS (decl
), NULL
);
7912 if (TREE_VALUE (attr
) != NULL_TREE
)
7914 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7915 cl
= c_omp_declare_simd_clauses_to_numbers
7916 (DECL_ARGUMENTS (decl
), cl
);
7918 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7920 TREE_VALUE (attr
) = NULL_TREE
;
7926 /* Caller will do the rest of this. */
7930 if (ctype
!= NULL_TREE
)
7931 grokclassfn (ctype
, decl
, flags
);
7934 if (cxx_dialect
>= cxx11
7935 && DECL_DESTRUCTOR_P (decl
)
7936 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7937 && !processing_template_decl
)
7938 deduce_noexcept_on_destructor (decl
);
7940 decl
= check_explicit_specialization (orig_declarator
, decl
,
7943 4 * (friendp
!= 0));
7944 if (decl
== error_mark_node
)
7947 if (DECL_STATIC_FUNCTION_P (decl
))
7948 check_static_quals (decl
, quals
);
7952 cplus_decl_attributes (&decl
, *attrlist
, 0);
7953 *attrlist
= NULL_TREE
;
7956 /* Check main's type after attributes have been applied. */
7957 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7959 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7962 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7964 error ("%<::main%> must return %<int%>");
7965 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7966 TREE_TYPE (decl
) = newtype
;
7969 check_main_parameter_types (decl
);
7972 if (ctype
!= NULL_TREE
7973 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7976 tree old_decl
= check_classfn (ctype
, decl
,
7977 (processing_template_decl
7978 > template_class_depth (ctype
))
7979 ? current_template_parms
7982 if (old_decl
== error_mark_node
)
7990 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7991 /* Because grokfndecl is always supposed to return a
7992 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7993 here. We depend on our callers to figure out that its
7994 really a template that's being returned. */
7995 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7997 if (DECL_STATIC_FUNCTION_P (old_decl
)
7998 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8000 /* Remove the `this' parm added by grokclassfn. */
8001 revert_static_member_fn (decl
);
8002 check_static_quals (decl
, quals
);
8004 if (DECL_ARTIFICIAL (old_decl
))
8006 error ("definition of implicitly-declared %qD", old_decl
);
8009 else if (DECL_DEFAULTED_FN (old_decl
))
8011 error ("definition of explicitly-defaulted %q+D", decl
);
8012 error ("%q+#D explicitly defaulted here", old_decl
);
8016 /* Since we've smashed OLD_DECL to its
8017 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8018 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8019 decl
= DECL_TEMPLATE_RESULT (decl
);
8021 /* Attempt to merge the declarations. This can fail, in
8022 the case of some invalid specialization declarations. */
8023 pushed_scope
= push_scope (ctype
);
8024 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8026 pop_scope (pushed_scope
);
8029 error ("no %q#D member function declared in class %qT",
8033 if (ok
== error_mark_node
)
8039 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8042 if (ctype
== NULL_TREE
|| check
)
8046 DECL_VIRTUAL_P (decl
) = 1;
8051 /* decl is a FUNCTION_DECL.
8052 specifiers are the parsed virt-specifiers.
8054 Set flags to reflect the virt-specifiers.
8059 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8061 if (decl
== NULL_TREE
)
8063 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8064 DECL_OVERRIDE_P (decl
) = 1;
8065 if (specifiers
& VIRT_SPEC_FINAL
)
8066 DECL_FINAL_P (decl
) = 1;
8070 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8071 the linkage that DECL will receive in the object file. */
8074 set_linkage_for_static_data_member (tree decl
)
8076 /* A static data member always has static storage duration and
8077 external linkage. Note that static data members are forbidden in
8078 local classes -- the only situation in which a class has
8079 non-external linkage. */
8080 TREE_PUBLIC (decl
) = 1;
8081 TREE_STATIC (decl
) = 1;
8082 /* For non-template classes, static data members are always put
8083 out in exactly those files where they are defined, just as
8084 with ordinary namespace-scope variables. */
8085 if (!processing_template_decl
)
8086 DECL_INTERFACE_KNOWN (decl
) = 1;
8089 /* Create a VAR_DECL named NAME with the indicated TYPE.
8091 If SCOPE is non-NULL, it is the class type or namespace containing
8092 the variable. If SCOPE is NULL, the variable should is created in
8093 the innermost enclosing scope. */
8096 grokvardecl (tree type
,
8098 tree orig_declarator
,
8099 const cp_decl_specifier_seq
*declspecs
,
8106 tree explicit_scope
;
8108 gcc_assert (!name
|| identifier_p (name
));
8110 /* Compute the scope in which to place the variable, but remember
8111 whether or not that scope was explicitly specified by the user. */
8112 explicit_scope
= scope
;
8115 /* An explicit "extern" specifier indicates a namespace-scope
8117 if (declspecs
->storage_class
== sc_extern
)
8118 scope
= current_decl_namespace ();
8119 else if (!at_function_scope_p ())
8120 scope
= current_scope ();
8124 && (/* If the variable is a namespace-scope variable declared in a
8125 template, we need DECL_LANG_SPECIFIC. */
8126 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8127 /* Similarly for namespace-scope variables with language linkage
8129 || (TREE_CODE (scope
) == NAMESPACE_DECL
8130 && current_lang_name
!= lang_name_cplusplus
)
8131 /* Similarly for static data members. */
8133 /* Similarly for explicit specializations. */
8135 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8136 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8138 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8140 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8141 set_decl_namespace (decl
, explicit_scope
, 0);
8143 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8145 if (declspecs
->storage_class
== sc_extern
)
8147 DECL_THIS_EXTERN (decl
) = 1;
8148 DECL_EXTERNAL (decl
) = !initialized
;
8151 if (DECL_CLASS_SCOPE_P (decl
))
8153 set_linkage_for_static_data_member (decl
);
8154 /* This function is only called with out-of-class definitions. */
8155 DECL_EXTERNAL (decl
) = 0;
8156 check_class_member_definition_namespace (decl
);
8158 /* At top level, either `static' or no s.c. makes a definition
8159 (perhaps tentative), and absence of `static' makes it public. */
8160 else if (toplevel_bindings_p ())
8162 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8163 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8164 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8166 /* Not at top level, only `static' makes a static definition. */
8169 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8170 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8173 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8175 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8176 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8177 if (declspecs
->gnu_thread_keyword_p
)
8178 DECL_GNU_TLS_P (decl
) = true;
8181 /* If the type of the decl has no linkage, make sure that we'll
8182 notice that in mark_used. */
8183 if (cxx_dialect
> cxx98
8184 && decl_linkage (decl
) != lk_none
8185 && DECL_LANG_SPECIFIC (decl
) == NULL
8186 && !DECL_EXTERN_C_P (decl
)
8187 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8188 retrofit_lang_decl (decl
);
8190 if (TREE_PUBLIC (decl
))
8192 /* [basic.link]: A name with no linkage (notably, the name of a class
8193 or enumeration declared in a local scope) shall not be used to
8194 declare an entity with linkage.
8196 DR 757 relaxes this restriction for C++0x. */
8197 if (cxx_dialect
< cxx11
)
8198 no_linkage_error (decl
);
8201 DECL_INTERFACE_KNOWN (decl
) = 1;
8203 // Handle explicit specializations and instantiations of variable templates.
8204 if (orig_declarator
)
8205 decl
= check_explicit_specialization (orig_declarator
, decl
,
8208 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8211 /* Create and return a canonical pointer to member function type, for
8212 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8215 build_ptrmemfunc_type (tree type
)
8220 if (type
== error_mark_node
)
8223 /* If a canonical type already exists for this type, use it. We use
8224 this method instead of type_hash_canon, because it only does a
8225 simple equality check on the list of field members. */
8227 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8230 /* Make sure that we always have the unqualified pointer-to-member
8232 if (cp_cv_quals quals
= cp_type_quals (type
))
8234 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8235 return cp_build_qualified_type (unqual
, quals
);
8238 t
= make_node (RECORD_TYPE
);
8240 /* Let the front end know this is a pointer to member function. */
8241 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8243 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8246 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8248 DECL_CHAIN (field
) = fields
;
8251 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8253 /* Zap out the name so that the back end will give us the debugging
8254 information for this anonymous RECORD_TYPE. */
8255 TYPE_NAME (t
) = NULL_TREE
;
8257 /* Cache this pointer-to-member type so that we can find it again
8259 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8261 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8262 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8263 else if (TYPE_CANONICAL (type
) != type
)
8264 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8269 /* Create and return a pointer to data member type. */
8272 build_ptrmem_type (tree class_type
, tree member_type
)
8274 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8276 cp_cv_quals quals
= type_memfn_quals (member_type
);
8277 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8278 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8279 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8283 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8284 return build_offset_type (class_type
, member_type
);
8288 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8289 Check to see that the definition is valid. Issue appropriate error
8290 messages. Return 1 if the definition is particularly bad, or 0
8294 check_static_variable_definition (tree decl
, tree type
)
8296 /* Can't check yet if we don't know the type. */
8297 if (dependent_type_p (type
))
8299 /* If DECL is declared constexpr, we'll do the appropriate checks
8300 in check_initializer. */
8301 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8303 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8305 if (!COMPLETE_TYPE_P (type
))
8306 error ("in-class initialization of static data member %q#D of "
8307 "incomplete type", decl
);
8308 else if (literal_type_p (type
))
8309 permerror (input_location
,
8310 "%<constexpr%> needed for in-class initialization of "
8311 "static data member %q#D of non-integral type", decl
);
8313 error ("in-class initialization of static data member %q#D of "
8314 "non-literal type", decl
);
8318 /* Motion 10 at San Diego: If a static const integral data member is
8319 initialized with an integral constant expression, the initializer
8320 may appear either in the declaration (within the class), or in
8321 the definition, but not both. If it appears in the class, the
8322 member is a member constant. The file-scope definition is always
8324 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8326 error ("invalid in-class initialization of static data member "
8327 "of non-integral type %qT",
8331 else if (!CP_TYPE_CONST_P (type
))
8332 error ("ISO C++ forbids in-class initialization of non-const "
8333 "static member %qD",
8335 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8336 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8337 "%qD of non-integral type %qT", decl
, type
);
8342 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8343 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8344 expressions out into temporary variables so that walk_tree doesn't
8345 step into them (c++/15764). */
8348 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8350 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8351 tree expr
= *expr_p
;
8352 if (TREE_CODE (expr
) == SAVE_EXPR
)
8354 tree op
= TREE_OPERAND (expr
, 0);
8355 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8356 if (TREE_SIDE_EFFECTS (op
))
8357 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8360 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8365 /* Entry point for the above. */
8368 stabilize_vla_size (tree size
)
8370 hash_set
<tree
> pset
;
8371 /* Break out any function calls into temporary variables. */
8372 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8375 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8376 not inside of SAVE_EXPR and fold them. */
8379 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8381 tree expr
= *expr_p
;
8382 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8384 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8386 *(bool *)data
= true;
8387 if (SIZEOF_EXPR_TYPE_P (expr
))
8388 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8389 SIZEOF_EXPR
, false);
8390 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8391 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8394 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8396 if (expr
== error_mark_node
)
8397 expr
= size_one_node
;
8404 /* Given the SIZE (i.e., number of elements) in an array, compute an
8405 appropriate index type for the array. If non-NULL, NAME is the
8406 name of the thing being declared. */
8409 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8414 if (error_operand_p (size
))
8415 return error_mark_node
;
8417 if (!type_dependent_expression_p (size
))
8419 tree type
= TREE_TYPE (size
);
8421 mark_rvalue_use (size
);
8423 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8424 && TREE_SIDE_EFFECTS (size
))
8425 /* In C++98, we mark a non-constant array bound with a magic
8426 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8429 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8431 if (CLASS_TYPE_P (type
)
8432 && CLASSTYPE_LITERAL_P (type
))
8434 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8437 if (!(complain
& tf_error
))
8438 return error_mark_node
;
8440 error ("size of array %qD has non-integral type %qT",
8443 error ("size of array has non-integral type %qT", type
);
8444 size
= integer_one_node
;
8446 if (size
== error_mark_node
)
8447 return error_mark_node
;
8448 type
= TREE_TYPE (size
);
8451 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8452 size
= maybe_constant_value (size
);
8454 if (!TREE_CONSTANT (size
))
8458 if (error_operand_p (size
))
8459 return error_mark_node
;
8461 /* The array bound must be an integer type. */
8462 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8464 if (!(complain
& tf_error
))
8465 return error_mark_node
;
8467 error ("size of array %qD has non-integral type %qT", name
, type
);
8469 error ("size of array has non-integral type %qT", type
);
8470 size
= integer_one_node
;
8471 type
= TREE_TYPE (size
);
8475 /* A type is dependent if it is...an array type constructed from any
8476 dependent type or whose size is specified by a constant expression
8477 that is value-dependent. */
8478 /* We can only call value_dependent_expression_p on integral constant
8479 expressions; treat non-constant expressions as dependent, too. */
8480 if (processing_template_decl
8481 && (type_dependent_expression_p (size
)
8482 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8484 /* We cannot do any checking for a SIZE that isn't known to be
8485 constant. Just build the index type and mark that it requires
8486 structural equality checks. */
8487 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8488 size
, size_one_node
));
8489 TYPE_DEPENDENT_P (itype
) = 1;
8490 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8491 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8495 /* Normally, the array-bound will be a constant. */
8496 if (TREE_CODE (size
) == INTEGER_CST
)
8498 /* Check to see if the array bound overflowed. Make that an
8499 error, no matter how generous we're being. */
8500 constant_expression_error (size
);
8502 /* An array must have a positive number of elements. */
8503 if (tree_int_cst_lt (size
, integer_zero_node
))
8505 if (!(complain
& tf_error
))
8506 return error_mark_node
;
8508 error ("size of array %qD is negative", name
);
8510 error ("size of array is negative");
8511 size
= integer_one_node
;
8513 /* As an extension we allow zero-sized arrays. */
8514 else if (integer_zerop (size
))
8516 if (!(complain
& tf_error
))
8517 /* We must fail if performing argument deduction (as
8518 indicated by the state of complain), so that
8519 another substitution can be found. */
8520 return error_mark_node
;
8521 else if (in_system_header_at (input_location
))
8522 /* Allow them in system headers because glibc uses them. */;
8524 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8526 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8529 else if (TREE_CONSTANT (size
)
8530 /* We don't allow VLAs at non-function scopes, or during
8531 tentative template substitution. */
8532 || !at_function_scope_p ()
8533 || !(complain
& tf_error
))
8535 if (!(complain
& tf_error
))
8536 return error_mark_node
;
8537 /* `(int) &fn' is not a valid array bound. */
8539 error ("size of array %qD is not an integral constant-expression",
8542 error ("size of array is not an integral constant-expression");
8543 size
= integer_one_node
;
8545 else if (pedantic
&& warn_vla
!= 0)
8548 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8550 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8552 else if (warn_vla
> 0)
8556 "variable length array %qD is used", name
);
8559 "variable length array is used");
8562 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8563 /* A variable sized array. */
8564 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8567 HOST_WIDE_INT saved_processing_template_decl
;
8569 /* Compute the index of the largest element in the array. It is
8570 one less than the number of elements in the array. We save
8571 and restore PROCESSING_TEMPLATE_DECL so that computations in
8572 cp_build_binary_op will be appropriately folded. */
8573 saved_processing_template_decl
= processing_template_decl
;
8574 processing_template_decl
= 0;
8575 itype
= cp_build_binary_op (input_location
,
8577 cp_convert (ssizetype
, size
, complain
),
8578 cp_convert (ssizetype
, integer_one_node
,
8581 itype
= fold (itype
);
8582 processing_template_decl
= saved_processing_template_decl
;
8584 if (!TREE_CONSTANT (itype
))
8586 /* A variable sized array. */
8587 itype
= variable_size (itype
);
8589 if (TREE_CODE (itype
) != SAVE_EXPR
)
8591 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8592 they might survive till gimplification. */
8593 tree newitype
= itype
;
8595 cp_walk_tree_without_duplicates (&newitype
,
8596 fold_sizeof_expr_r
, &found
);
8598 itype
= variable_size (fold (newitype
));
8601 stabilize_vla_size (itype
);
8603 if (flag_sanitize
& SANITIZE_VLA
8604 && do_ubsan_in_current_function ())
8606 /* We have to add 1 -- in the ubsan routine we generate
8607 LE_EXPR rather than LT_EXPR. */
8608 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8609 build_one_cst (TREE_TYPE (itype
)));
8610 t
= ubsan_instrument_vla (input_location
, t
);
8611 finish_expr_stmt (t
);
8614 /* Make sure that there was no overflow when creating to a signed
8615 index type. (For example, on a 32-bit machine, an array with
8616 size 2^32 - 1 is too big.) */
8617 else if (TREE_CODE (itype
) == INTEGER_CST
8618 && TREE_OVERFLOW (itype
))
8620 if (!(complain
& tf_error
))
8621 return error_mark_node
;
8622 error ("overflow in array dimension");
8623 TREE_OVERFLOW (itype
) = 0;
8627 /* Create and return the appropriate index type. */
8628 itype
= build_index_type (itype
);
8630 /* If the index type were dependent, we would have returned early, so
8631 remember that it isn't. */
8632 TYPE_DEPENDENT_P (itype
) = 0;
8633 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8637 /* Returns the scope (if any) in which the entity declared by
8638 DECLARATOR will be located. If the entity was declared with an
8639 unqualified name, NULL_TREE is returned. */
8642 get_scope_of_declarator (const cp_declarator
*declarator
)
8644 while (declarator
&& declarator
->kind
!= cdk_id
)
8645 declarator
= declarator
->declarator
;
8647 /* If the declarator-id is a SCOPE_REF, the scope in which the
8648 declaration occurs is the first operand. */
8650 && declarator
->u
.id
.qualifying_scope
)
8651 return declarator
->u
.id
.qualifying_scope
;
8653 /* Otherwise, the declarator is not a qualified name; the entity will
8654 be declared in the current scope. */
8658 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8659 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8663 create_array_type_for_decl (tree name
, tree type
, tree size
)
8665 tree itype
= NULL_TREE
;
8667 /* If things have already gone awry, bail now. */
8668 if (type
== error_mark_node
|| size
== error_mark_node
)
8669 return error_mark_node
;
8671 /* 8.3.4/1: If the type of the identifier of D contains the auto
8672 type-specifier, the program is ill-formed. */
8673 if (type_uses_auto (type
))
8675 error ("%qD declared as array of %qT", name
, type
);
8676 return error_mark_node
;
8679 /* If there are some types which cannot be array elements,
8680 issue an error-message and return. */
8681 switch (TREE_CODE (type
))
8685 error ("declaration of %qD as array of void", name
);
8687 error ("creating array of void");
8688 return error_mark_node
;
8692 error ("declaration of %qD as array of functions", name
);
8694 error ("creating array of functions");
8695 return error_mark_node
;
8697 case REFERENCE_TYPE
:
8699 error ("declaration of %qD as array of references", name
);
8701 error ("creating array of references");
8702 return error_mark_node
;
8706 error ("declaration of %qD as array of function members", name
);
8708 error ("creating array of function members");
8709 return error_mark_node
;
8717 The constant expressions that specify the bounds of the arrays
8718 can be omitted only for the first member of the sequence. */
8719 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8722 error ("declaration of %qD as multidimensional array must "
8723 "have bounds for all dimensions except the first",
8726 error ("multidimensional array must have bounds for all "
8727 "dimensions except the first");
8729 return error_mark_node
;
8732 /* Figure out the index type for the array. */
8734 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8737 T is called the array element type; this type shall not be [...] an
8738 abstract class type. */
8739 abstract_virtuals_error (name
, type
);
8741 return build_cplus_array_type (type
, itype
);
8744 /* Check that it's OK to declare a function with the indicated TYPE.
8745 SFK indicates the kind of special function (if any) that this
8746 function is. OPTYPE is the type given in a conversion operator
8747 declaration, or the class type for a constructor/destructor.
8748 Returns the actual return type of the function; that
8749 may be different than TYPE if an error occurs, or for certain
8750 special functions. */
8753 check_special_function_return_type (special_function_kind sfk
,
8759 case sfk_constructor
:
8761 error ("return type specification for constructor invalid");
8763 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8764 type
= build_pointer_type (optype
);
8766 type
= void_type_node
;
8769 case sfk_destructor
:
8771 error ("return type specification for destructor invalid");
8772 /* We can't use the proper return type here because we run into
8773 problems with ambiguous bases and covariant returns.
8774 Java classes are left unchanged because (void *) isn't a valid
8775 Java type, and we don't want to change the Java ABI. */
8776 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8777 type
= build_pointer_type (void_type_node
);
8779 type
= void_type_node
;
8782 case sfk_conversion
:
8784 error ("return type specified for %<operator %T%>", optype
);
8795 /* A variable or data member (whose unqualified name is IDENTIFIER)
8796 has been declared with the indicated TYPE. If the TYPE is not
8797 acceptable, issue an error message and return a type to use for
8798 error-recovery purposes. */
8801 check_var_type (tree identifier
, tree type
)
8803 if (VOID_TYPE_P (type
))
8806 error ("unnamed variable or field declared void");
8807 else if (identifier_p (identifier
))
8809 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8810 error ("variable or field %qE declared void", identifier
);
8813 error ("variable or field declared void");
8814 type
= error_mark_node
;
8820 /* Given declspecs and a declarator (abstract or otherwise), determine
8821 the name and type of the object declared and construct a DECL node
8824 DECLSPECS points to the representation of declaration-specifier
8825 sequence that precedes declarator.
8827 DECL_CONTEXT says which syntactic context this declaration is in:
8828 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8829 FUNCDEF for a function definition. Like NORMAL but a few different
8830 error messages in each case. Return value may be zero meaning
8831 this definition is too screwy to try to parse.
8832 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8833 handle member functions (which have FIELD context).
8834 Return value may be zero meaning this definition is too screwy to
8836 PARM for a parameter declaration (either within a function prototype
8837 or before a function body). Make a PARM_DECL, or return void_type_node.
8838 TPARM for a template parameter declaration.
8839 CATCHPARM for a parameter declaration before a catch clause.
8840 TYPENAME if for a typename (in a cast or sizeof).
8841 Don't make a DECL node; just return the ..._TYPE node.
8842 FIELD for a struct or union field; make a FIELD_DECL.
8843 BITFIELD for a field with specified width.
8845 INITIALIZED is as for start_decl.
8847 ATTRLIST is a pointer to the list of attributes, which may be NULL
8848 if there are none; *ATTRLIST may be modified if attributes from inside
8849 the declarator should be applied to the declaration.
8851 When this function is called, scoping variables (such as
8852 CURRENT_CLASS_TYPE) should reflect the scope in which the
8853 declaration occurs, not the scope in which the new declaration will
8854 be placed. For example, on:
8858 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8861 Returns a DECL (if a declarator is present), a TYPE (if there is no
8862 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8866 grokdeclarator (const cp_declarator
*declarator
,
8867 cp_decl_specifier_seq
*declspecs
,
8868 enum decl_context decl_context
,
8872 tree type
= NULL_TREE
;
8874 int explicit_intN
= 0;
8875 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8876 int explicit_int
= 0;
8877 int explicit_char
= 0;
8878 int defaulted_int
= 0;
8880 tree typedef_decl
= NULL_TREE
;
8881 const char *name
= NULL
;
8882 tree typedef_type
= NULL_TREE
;
8883 /* True if this declarator is a function definition. */
8884 bool funcdef_flag
= false;
8885 cp_declarator_kind innermost_code
= cdk_error
;
8888 /* See the code below that used this. */
8889 tree decl_attr
= NULL_TREE
;
8892 /* Keep track of what sort of function is being processed
8893 so that we can warn about default return values, or explicit
8894 return values which do not match prescribed defaults. */
8895 special_function_kind sfk
= sfk_none
;
8897 tree dname
= NULL_TREE
;
8898 tree ctor_return_type
= NULL_TREE
;
8899 enum overload_flags flags
= NO_SPECIAL
;
8900 /* cv-qualifiers that apply to the declarator, for a declaration of
8901 a member function. */
8902 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8903 /* virt-specifiers that apply to the declarator, for a declaration of
8904 a member function. */
8905 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8906 /* ref-qualifier that applies to the declarator, for a declaration of
8907 a member function. */
8908 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8909 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8911 tree raises
= NULL_TREE
;
8912 int template_count
= 0;
8913 tree returned_attrs
= NULL_TREE
;
8914 tree parms
= NULL_TREE
;
8915 const cp_declarator
*id_declarator
;
8916 /* The unqualified name of the declarator; either an
8917 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8918 tree unqualified_id
;
8919 /* The class type, if any, in which this entity is located,
8920 or NULL_TREE if none. Note that this value may be different from
8921 the current class type; for example if an attempt is made to declare
8922 "A::f" inside "B", this value will be "A". */
8923 tree ctype
= current_class_type
;
8924 /* The NAMESPACE_DECL for the namespace in which this entity is
8925 located. If an unqualified name is used to declare the entity,
8926 this value will be NULL_TREE, even if the entity is located at
8928 tree in_namespace
= NULL_TREE
;
8929 cp_storage_class storage_class
;
8930 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8931 bool type_was_error_mark_node
= false;
8932 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8933 bool template_type_arg
= false;
8934 bool template_parm_flag
= false;
8935 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8936 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8937 bool late_return_type_p
= false;
8938 bool array_parameter_p
= false;
8939 source_location saved_loc
= input_location
;
8942 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8943 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8944 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8945 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8946 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8947 explicit_intN
= declspecs
->explicit_intN_p
;
8948 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8950 if (decl_context
== FUNCDEF
)
8951 funcdef_flag
= true, decl_context
= NORMAL
;
8952 else if (decl_context
== MEMFUNCDEF
)
8953 funcdef_flag
= true, decl_context
= FIELD
;
8954 else if (decl_context
== BITFIELD
)
8955 bitfield
= 1, decl_context
= FIELD
;
8956 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8957 template_type_arg
= true, decl_context
= TYPENAME
;
8958 else if (decl_context
== TPARM
)
8959 template_parm_flag
= true, decl_context
= PARM
;
8961 if (initialized
> 1)
8962 funcdef_flag
= true;
8964 /* Look inside a declarator for the name being declared
8965 and get it as a string, for an error message. */
8966 for (id_declarator
= declarator
;
8968 id_declarator
= id_declarator
->declarator
)
8970 if (id_declarator
->kind
!= cdk_id
)
8971 innermost_code
= id_declarator
->kind
;
8973 switch (id_declarator
->kind
)
8976 if (id_declarator
->declarator
8977 && id_declarator
->declarator
->kind
== cdk_id
)
8979 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8980 if (sfk
== sfk_destructor
)
8987 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8988 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8991 if (qualifying_scope
)
8993 if (at_function_scope_p ())
8997 A declarator-id shall not be qualified except
9000 None of the cases are permitted in block
9002 if (qualifying_scope
== global_namespace
)
9003 error ("invalid use of qualified-name %<::%D%>",
9005 else if (TYPE_P (qualifying_scope
))
9006 error ("invalid use of qualified-name %<%T::%D%>",
9007 qualifying_scope
, decl
);
9009 error ("invalid use of qualified-name %<%D::%D%>",
9010 qualifying_scope
, decl
);
9011 return error_mark_node
;
9013 else if (TYPE_P (qualifying_scope
))
9015 ctype
= qualifying_scope
;
9016 if (!MAYBE_CLASS_TYPE_P (ctype
))
9018 error ("%q#T is not a class or a namespace", ctype
);
9021 else if (innermost_code
!= cdk_function
9022 && current_class_type
9023 && !uniquely_derived_from_p (ctype
,
9024 current_class_type
))
9026 error ("invalid use of qualified-name %<%T::%D%>",
9027 qualifying_scope
, decl
);
9028 return error_mark_node
;
9031 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9032 in_namespace
= qualifying_scope
;
9034 switch (TREE_CODE (decl
))
9040 if (innermost_code
!= cdk_function
)
9042 error ("declaration of %qD as non-function", decl
);
9043 return error_mark_node
;
9045 else if (!qualifying_scope
9046 && !(current_class_type
&& at_class_scope_p ()))
9048 error ("declaration of %qD as non-member", decl
);
9049 return error_mark_node
;
9052 type
= TREE_OPERAND (decl
, 0);
9054 type
= constructor_name (type
);
9055 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9060 case TEMPLATE_ID_EXPR
:
9062 tree fns
= TREE_OPERAND (decl
, 0);
9065 if (!identifier_p (dname
))
9067 if (variable_template_p (dname
))
9068 dname
= DECL_NAME (dname
);
9071 gcc_assert (is_overloaded_fn (dname
));
9072 dname
= DECL_NAME (get_first_fn (dname
));
9078 case IDENTIFIER_NODE
:
9079 if (identifier_p (decl
))
9082 if (C_IS_RESERVED_WORD (dname
))
9084 error ("declarator-id missing; using reserved word %qD",
9086 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9088 else if (!IDENTIFIER_TYPENAME_P (dname
))
9089 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9092 gcc_assert (flags
== NO_SPECIAL
);
9093 flags
= TYPENAME_FLAG
;
9094 ctor_return_type
= TREE_TYPE (dname
);
9095 sfk
= sfk_conversion
;
9096 if (is_typename_at_global_scope (dname
))
9097 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9099 name
= "<invalid operator>";
9116 return error_mark_node
;
9121 if (id_declarator
->kind
== cdk_id
)
9127 The declarator in a function-definition shall have the form
9128 D1 ( parameter-declaration-clause) ... */
9129 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9131 error ("function definition does not declare parameters");
9132 return error_mark_node
;
9135 if (flags
== TYPENAME_FLAG
9136 && innermost_code
!= cdk_function
9137 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9139 error ("declaration of %qD as non-function", dname
);
9140 return error_mark_node
;
9144 && identifier_p (dname
)
9145 && UDLIT_OPER_P (dname
)
9146 && innermost_code
!= cdk_function
)
9148 error ("declaration of %qD as non-function", dname
);
9149 return error_mark_node
;
9152 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9156 error ("declaration of %qD as %<typedef%>", dname
);
9157 return error_mark_node
;
9159 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9161 error ("declaration of %qD as parameter", dname
);
9162 return error_mark_node
;
9166 /* Anything declared one level down from the top level
9167 must be one of the parameters of a function
9168 (because the body is at least two levels down). */
9170 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9171 by not allowing C++ class definitions to specify their parameters
9172 with xdecls (must be spec.d in the parmlist).
9174 Since we now wait to push a class scope until we are sure that
9175 we are in a legitimate method context, we must set oldcname
9176 explicitly (since current_class_name is not yet alive).
9178 We also want to avoid calling this a PARM if it is in a namespace. */
9180 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9182 cp_binding_level
*b
= current_binding_level
;
9183 current_binding_level
= b
->level_chain
;
9184 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9185 decl_context
= PARM
;
9186 current_binding_level
= b
;
9190 name
= decl_context
== PARM
? "parameter" : "type name";
9192 if (constexpr_p
&& typedef_p
)
9194 error ("%<constexpr%> cannot appear in a typedef declaration");
9195 return error_mark_node
;
9198 /* If there were multiple types specified in the decl-specifier-seq,
9199 issue an error message. */
9200 if (declspecs
->multiple_types_p
)
9202 error ("two or more data types in declaration of %qs", name
);
9203 return error_mark_node
;
9206 if (declspecs
->conflicting_specifiers_p
)
9208 error ("conflicting specifiers in declaration of %qs", name
);
9209 return error_mark_node
;
9212 /* Extract the basic type from the decl-specifier-seq. */
9213 type
= declspecs
->type
;
9214 if (type
== error_mark_node
)
9217 type_was_error_mark_node
= true;
9219 /* If the entire declaration is itself tagged as deprecated then
9220 suppress reports of deprecated items. */
9221 if (type
&& TREE_DEPRECATED (type
)
9222 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9223 warn_deprecated_use (type
, NULL_TREE
);
9224 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9226 typedef_decl
= type
;
9227 type
= TREE_TYPE (typedef_decl
);
9228 if (TREE_DEPRECATED (type
)
9229 && DECL_ARTIFICIAL (typedef_decl
)
9230 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9231 warn_deprecated_use (type
, NULL_TREE
);
9233 /* No type at all: default to `int', and set DEFAULTED_INT
9234 because it was not a user-defined typedef. */
9235 if (type
== NULL_TREE
)
9237 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9239 /* These imply 'int'. */
9240 type
= integer_type_node
;
9243 /* If we just have "complex", it is equivalent to "complex double". */
9244 else if (!longlong
&& !explicit_intN
9245 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9247 type
= double_type_node
;
9248 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9249 "ISO C++ does not support plain %<complex%> meaning "
9250 "%<double complex%>");
9254 explicit_int
= declspecs
->explicit_int_p
;
9255 explicit_char
= declspecs
->explicit_char_p
;
9258 /* See the code below that used this. */
9260 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9262 typedef_type
= type
;
9265 if (sfk
!= sfk_conversion
)
9266 ctor_return_type
= ctype
;
9268 if (sfk
!= sfk_none
)
9269 type
= check_special_function_return_type (sfk
, type
,
9271 else if (type
== NULL_TREE
)
9277 /* We handle `main' specially here, because 'main () { }' is so
9278 common. With no options, it is allowed. With -Wreturn-type,
9279 it is a warning. It is only an error with -pedantic-errors. */
9280 is_main
= (funcdef_flag
9281 && dname
&& identifier_p (dname
)
9282 && MAIN_NAME_P (dname
)
9283 && ctype
== NULL_TREE
9284 && in_namespace
== NULL_TREE
9285 && current_namespace
== global_namespace
);
9287 if (type_was_error_mark_node
)
9288 /* We've already issued an error, don't complain more. */;
9289 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9290 /* Allow it, sigh. */;
9292 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9294 pedwarn (input_location
, OPT_Wpedantic
,
9295 "ISO C++ forbids declaration of %qs with no type", name
);
9297 warning (OPT_Wreturn_type
,
9298 "ISO C++ forbids declaration of %qs with no type", name
);
9300 type
= integer_type_node
;
9307 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9309 error ("%<__int%d%> is not supported by this target",
9310 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9311 explicit_intN
= false;
9313 else if (pedantic
&& ! in_system_header_at (input_location
))
9314 pedwarn (input_location
, OPT_Wpedantic
,
9315 "ISO C++ does not support %<__int%d%> for %qs",
9316 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9319 /* Now process the modifiers that were specified
9320 and check for invalid combinations. */
9322 /* Long double is a special combination. */
9323 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9326 type
= cp_build_qualified_type (long_double_type_node
,
9327 cp_type_quals (type
));
9330 /* Check all other uses of type modifiers. */
9332 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9336 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9337 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9338 else if (signed_p
&& unsigned_p
)
9339 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9340 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9341 error ("%<long long%> invalid for %qs", name
);
9342 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9343 error ("%<long%> invalid for %qs", name
);
9344 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9345 error ("%<short%> invalid for %qs", name
);
9346 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9347 error ("%<long%> or %<short%> invalid for %qs", name
);
9348 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9349 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9350 else if ((long_p
|| short_p
) && explicit_char
)
9351 error ("%<long%> or %<short%> specified with char for %qs", name
);
9352 else if (long_p
&& short_p
)
9353 error ("%<long%> and %<short%> specified together for %qs", name
);
9354 else if (type
== char16_type_node
|| type
== char32_type_node
)
9356 if (signed_p
|| unsigned_p
)
9357 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9358 else if (short_p
|| long_p
)
9359 error ("%<short%> or %<long%> invalid for %qs", name
);
9364 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9366 pedwarn (input_location
, OPT_Wpedantic
,
9367 "long, short, signed or unsigned used invalidly for %qs",
9369 if (flag_pedantic_errors
)
9374 /* Discard the type modifiers if they are invalid. */
9385 /* Decide whether an integer type is signed or not.
9386 Optionally treat bitfields as signed by default. */
9390 It is implementation-defined whether a plain (neither
9391 explicitly signed or unsigned) char, short, int, or long
9392 bit-field is signed or unsigned.
9394 Naturally, we extend this to long long as well. Note that
9395 this does not include wchar_t. */
9396 || (bitfield
&& !flag_signed_bitfields
9398 /* A typedef for plain `int' without `signed' can be
9399 controlled just like plain `int', but a typedef for
9400 `signed int' cannot be so controlled. */
9402 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9403 && TREE_CODE (type
) == INTEGER_TYPE
9404 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9407 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9409 type
= long_long_unsigned_type_node
;
9411 type
= long_unsigned_type_node
;
9413 type
= short_unsigned_type_node
;
9414 else if (type
== char_type_node
)
9415 type
= unsigned_char_type_node
;
9416 else if (typedef_decl
)
9417 type
= unsigned_type_for (type
);
9419 type
= unsigned_type_node
;
9421 else if (signed_p
&& type
== char_type_node
)
9422 type
= signed_char_type_node
;
9423 else if (explicit_intN
)
9424 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9426 type
= long_long_integer_type_node
;
9428 type
= long_integer_type_node
;
9430 type
= short_integer_type_node
;
9432 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9434 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9435 error ("complex invalid for %qs", name
);
9436 /* If a modifier is specified, the resulting complex is the complex
9437 form of TYPE. E.g, "complex short" is "complex short int". */
9438 else if (type
== integer_type_node
)
9439 type
= complex_integer_type_node
;
9440 else if (type
== float_type_node
)
9441 type
= complex_float_type_node
;
9442 else if (type
== double_type_node
)
9443 type
= complex_double_type_node
;
9444 else if (type
== long_double_type_node
)
9445 type
= complex_long_double_type_node
;
9447 type
= build_complex_type (type
);
9450 type_quals
= TYPE_UNQUALIFIED
;
9451 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9452 type_quals
|= TYPE_QUAL_CONST
;
9453 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9454 type_quals
|= TYPE_QUAL_VOLATILE
;
9455 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9456 type_quals
|= TYPE_QUAL_RESTRICT
;
9457 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9458 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9461 /* If we're using the injected-class-name to form a compound type or a
9462 declaration, replace it with the underlying class so we don't get
9463 redundant typedefs in the debug output. But if we are returning the
9464 type unchanged, leave it alone so that it's available to
9465 maybe_get_template_decl_from_type_decl. */
9466 if (CLASS_TYPE_P (type
)
9467 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9468 && type
== TREE_TYPE (TYPE_NAME (type
))
9469 && (declarator
|| type_quals
))
9470 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9472 type_quals
|= cp_type_quals (type
);
9473 type
= cp_build_qualified_type_real
9474 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9475 || declspecs
->decltype_p
)
9476 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9477 /* We might have ignored or rejected some of the qualifiers. */
9478 type_quals
= cp_type_quals (type
);
9481 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9482 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9483 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9485 storage_class
= declspecs
->storage_class
;
9486 if (storage_class
== sc_static
)
9487 staticp
= 1 + (decl_context
== FIELD
);
9489 if (virtualp
&& staticp
== 2)
9491 error ("member %qD cannot be declared both virtual and static", dname
);
9492 storage_class
= sc_none
;
9495 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9497 /* Issue errors about use of storage classes for parameters. */
9498 if (decl_context
== PARM
)
9502 error ("typedef declaration invalid in parameter declaration");
9503 return error_mark_node
;
9505 else if (template_parm_flag
&& storage_class
!= sc_none
)
9507 error ("storage class specified for template parameter %qs", name
);
9508 return error_mark_node
;
9510 else if (storage_class
== sc_static
9511 || storage_class
== sc_extern
9513 error ("storage class specifiers invalid in parameter declarations");
9515 /* Function parameters cannot be constexpr. If we saw one, moan
9516 and pretend it wasn't there. */
9519 error ("a parameter cannot be declared %<constexpr%>");
9524 /* Give error if `virtual' is used outside of class declaration. */
9526 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9528 error ("%<virtual%> outside class declaration");
9532 /* Static anonymous unions are dealt with here. */
9533 if (staticp
&& decl_context
== TYPENAME
9535 && ANON_AGGR_TYPE_P (declspecs
->type
))
9536 decl_context
= FIELD
;
9538 /* Warn about storage classes that are invalid for certain
9539 kinds of declarations (parameters, typenames, etc.). */
9542 && storage_class
!= sc_extern
9543 && storage_class
!= sc_static
)
9546 error ("multiple storage classes in declaration of %qs", name
);
9549 if (decl_context
!= NORMAL
9550 && ((storage_class
!= sc_none
9551 && storage_class
!= sc_mutable
)
9554 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9555 && (storage_class
== sc_register
9556 || storage_class
== sc_auto
))
9560 else if (decl_context
== FIELD
9561 /* C++ allows static class elements. */
9562 && storage_class
== sc_static
)
9563 /* C++ also allows inlines and signed and unsigned elements,
9564 but in those cases we don't come in here. */
9568 if (decl_context
== FIELD
)
9569 error ("storage class specified for %qs", name
);
9572 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9573 error ("storage class specified for parameter %qs", name
);
9575 error ("storage class specified for typename");
9577 if (storage_class
== sc_register
9578 || storage_class
== sc_auto
9579 || storage_class
== sc_extern
9581 storage_class
= sc_none
;
9584 else if (storage_class
== sc_extern
&& funcdef_flag
9585 && ! toplevel_bindings_p ())
9586 error ("nested function %qs declared %<extern%>", name
);
9587 else if (toplevel_bindings_p ())
9589 if (storage_class
== sc_auto
)
9590 error ("top-level declaration of %qs specifies %<auto%>", name
);
9593 && storage_class
!= sc_extern
9594 && storage_class
!= sc_static
)
9596 if (declspecs
->gnu_thread_keyword_p
)
9597 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9598 "declared %<__thread%>", name
);
9600 /* When thread_local is applied to a variable of block scope the
9601 storage-class-specifier static is implied if it does not appear
9603 storage_class
= declspecs
->storage_class
= sc_static
;
9607 if (storage_class
&& friendp
)
9609 error ("storage class specifiers invalid in friend function declarations");
9610 storage_class
= sc_none
;
9615 unqualified_id
= NULL_TREE
;
9618 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9619 switch (TREE_CODE (unqualified_id
))
9622 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9623 if (TYPE_P (unqualified_id
))
9624 unqualified_id
= constructor_name (unqualified_id
);
9627 case IDENTIFIER_NODE
:
9628 case TEMPLATE_ID_EXPR
:
9636 if (declspecs
->std_attributes
)
9638 /* Apply the c++11 attributes to the type preceding them. */
9639 input_location
= declspecs
->locations
[ds_std_attribute
];
9640 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9641 input_location
= saved_loc
;
9644 /* Determine the type of the entity declared by recurring on the
9646 for (; declarator
; declarator
= declarator
->declarator
)
9648 const cp_declarator
*inner_declarator
;
9651 if (type
== error_mark_node
)
9652 return error_mark_node
;
9654 attrs
= declarator
->attributes
;
9660 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9661 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9662 if (declarator
->kind
== cdk_function
)
9663 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9664 if (declarator
->kind
== cdk_array
)
9665 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9666 returned_attrs
= decl_attributes (&type
,
9667 chainon (returned_attrs
, attrs
),
9671 if (declarator
->kind
== cdk_id
)
9674 inner_declarator
= declarator
->declarator
;
9676 switch (declarator
->kind
)
9679 type
= create_array_type_for_decl (dname
, type
,
9680 declarator
->u
.array
.bounds
);
9681 if (declarator
->std_attributes
)
9684 The optional attribute-specifier-seq appertains to the
9686 returned_attrs
= chainon (returned_attrs
,
9687 declarator
->std_attributes
);
9695 /* Declaring a function type.
9696 Make sure we have a valid type for the function to return. */
9698 if (type_quals
!= TYPE_UNQUALIFIED
)
9700 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9701 warning (OPT_Wignored_qualifiers
,
9702 "type qualifiers ignored on function return type");
9703 /* We now know that the TYPE_QUALS don't apply to the
9704 decl, but to its return type. */
9705 type_quals
= TYPE_UNQUALIFIED
;
9707 errmsg
= targetm
.invalid_return_type (type
);
9711 type
= integer_type_node
;
9714 /* Error about some types functions can't return. */
9716 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9718 error ("%qs declared as function returning a function", name
);
9719 return error_mark_node
;
9721 if (TREE_CODE (type
) == ARRAY_TYPE
)
9723 error ("%qs declared as function returning an array", name
);
9724 return error_mark_node
;
9727 input_location
= declspecs
->locations
[ds_type_spec
];
9728 abstract_virtuals_error (ACU_RETURN
, type
);
9729 input_location
= saved_loc
;
9731 /* Pick up type qualifiers which should be applied to `this'. */
9732 memfn_quals
= declarator
->u
.function
.qualifiers
;
9733 /* Pick up virt-specifiers. */
9734 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9735 /* And ref-qualifier, too */
9736 rqual
= declarator
->u
.function
.ref_qualifier
;
9737 /* Pick up the exception specifications. */
9738 raises
= declarator
->u
.function
.exception_specification
;
9739 /* If the exception-specification is ill-formed, let's pretend
9740 there wasn't one. */
9741 if (raises
== error_mark_node
)
9744 /* Say it's a definition only for the CALL_EXPR
9745 closest to the identifier. */
9746 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9748 /* Handle a late-specified return type. */
9751 if (type_uses_auto (type
))
9753 if (!declarator
->u
.function
.late_return_type
)
9755 if (current_class_type
9756 && LAMBDA_TYPE_P (current_class_type
))
9757 /* OK for C++11 lambdas. */;
9758 else if (cxx_dialect
< cxx14
)
9760 error ("%qs function uses "
9761 "%<auto%> type specifier without trailing "
9762 "return type", name
);
9763 inform (input_location
, "deduced return type "
9764 "only available with -std=c++14 or "
9769 error ("virtual function cannot "
9770 "have deduced return type");
9774 else if (!is_auto (type
))
9776 error ("%qs function with trailing return type has"
9777 " %qT as its type rather than plain %<auto%>",
9779 return error_mark_node
;
9782 else if (declarator
->u
.function
.late_return_type
)
9784 if (cxx_dialect
< cxx11
)
9785 /* Not using maybe_warn_cpp0x because this should
9786 always be an error. */
9787 error ("trailing return type only available with "
9788 "-std=c++11 or -std=gnu++11");
9790 error ("%qs function with trailing return type not "
9791 "declared with %<auto%> type specifier", name
);
9792 return error_mark_node
;
9795 type
= splice_late_return_type
9796 (type
, declarator
->u
.function
.late_return_type
);
9797 if (type
== error_mark_node
)
9798 return error_mark_node
;
9800 if (declarator
->u
.function
.late_return_type
)
9801 late_return_type_p
= true;
9803 if (ctype
== NULL_TREE
9804 && decl_context
== FIELD
9807 ctype
= current_class_type
;
9809 if (ctype
&& (sfk
== sfk_constructor
9810 || sfk
== sfk_destructor
))
9812 /* We are within a class's scope. If our declarator name
9813 is the same as the class name, and we are defining
9814 a function, then it is a constructor/destructor, and
9815 therefore returns a void type. */
9817 /* ISO C++ 12.4/2. A destructor may not be declared
9818 const or volatile. A destructor may not be static.
9819 A destructor may not be declared with ref-qualifier.
9821 ISO C++ 12.1. A constructor may not be declared
9822 const or volatile. A constructor may not be
9823 virtual. A constructor may not be static.
9824 A constructor may not be declared with ref-qualifier. */
9826 error ((flags
== DTOR_FLAG
)
9827 ? G_("destructor cannot be static member function")
9828 : G_("constructor cannot be static member function"));
9831 error ((flags
== DTOR_FLAG
)
9832 ? G_("destructors may not be cv-qualified")
9833 : G_("constructors may not be cv-qualified"));
9834 memfn_quals
= TYPE_UNQUALIFIED
;
9839 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9840 error ((flags
== DTOR_FLAG
)
9841 ? "destructors may not be ref-qualified"
9842 : "constructors may not be ref-qualified");
9843 rqual
= REF_QUAL_NONE
;
9846 if (decl_context
== FIELD
9847 && !member_function_or_else (ctype
,
9850 return error_mark_node
;
9852 if (flags
!= DTOR_FLAG
)
9854 /* It's a constructor. */
9859 permerror (input_location
, "constructors cannot be declared virtual");
9862 if (decl_context
== FIELD
9863 && sfk
!= sfk_constructor
)
9864 return error_mark_node
;
9866 if (decl_context
== FIELD
)
9873 /* Cannot be both friend and virtual. */
9874 error ("virtual functions cannot be friends");
9877 if (decl_context
== NORMAL
)
9878 error ("friend declaration not in class definition");
9879 if (current_function_decl
&& funcdef_flag
)
9880 error ("can%'t define friend function %qs in a local "
9884 else if (ctype
&& sfk
== sfk_conversion
)
9888 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9893 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9896 if (inner_declarator
9897 && inner_declarator
->kind
== cdk_id
9898 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9899 && arg_types
!= void_list_node
)
9901 error ("destructors may not have parameters");
9902 arg_types
= void_list_node
;
9906 type
= build_function_type (type
, arg_types
);
9907 if (declarator
->std_attributes
)
9910 The optional attribute-specifier-seq appertains to
9911 the function type. */
9912 decl_attributes (&type
, declarator
->std_attributes
,
9920 /* Filter out pointers-to-references and references-to-references.
9921 We can get these if a TYPE_DECL is used. */
9923 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9925 if (declarator
->kind
!= cdk_reference
)
9927 error ("cannot declare pointer to %q#T", type
);
9928 type
= TREE_TYPE (type
);
9931 /* In C++0x, we allow reference to reference declarations
9932 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9933 and template type arguments [14.3.1/4 temp.arg.type]. The
9934 check for direct reference to reference declarations, which
9935 are still forbidden, occurs below. Reasoning behind the change
9936 can be found in DR106, DR540, and the rvalue reference
9938 else if (cxx_dialect
== cxx98
)
9940 error ("cannot declare reference to %q#T", type
);
9941 type
= TREE_TYPE (type
);
9944 else if (VOID_TYPE_P (type
))
9946 if (declarator
->kind
== cdk_reference
)
9947 error ("cannot declare reference to %q#T", type
);
9948 else if (declarator
->kind
== cdk_ptrmem
)
9949 error ("cannot declare pointer to %q#T member", type
);
9952 /* We now know that the TYPE_QUALS don't apply to the decl,
9953 but to the target of the pointer. */
9954 type_quals
= TYPE_UNQUALIFIED
;
9956 /* This code used to handle METHOD_TYPE, but I don't think it's
9957 possible to get it here anymore. */
9958 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9959 if (declarator
->kind
== cdk_ptrmem
9960 && TREE_CODE (type
) == FUNCTION_TYPE
)
9962 memfn_quals
|= type_memfn_quals (type
);
9963 type
= build_memfn_type (type
,
9964 declarator
->u
.pointer
.class_type
,
9967 if (type
== error_mark_node
)
9968 return error_mark_node
;
9970 rqual
= REF_QUAL_NONE
;
9971 memfn_quals
= TYPE_UNQUALIFIED
;
9974 if (TREE_CODE (type
) == FUNCTION_TYPE
9975 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9976 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9977 error (declarator
->kind
== cdk_reference
9978 ? G_("cannot declare reference to qualified function type %qT")
9979 : G_("cannot declare pointer to qualified function type %qT"),
9982 /* When the pointed-to type involves components of variable size,
9983 care must be taken to ensure that the size evaluation code is
9984 emitted early enough to dominate all the possible later uses
9985 and late enough for the variables on which it depends to have
9988 This is expected to happen automatically when the pointed-to
9989 type has a name/declaration of it's own, but special attention
9990 is required if the type is anonymous.
9992 We handle the NORMAL and FIELD contexts here by inserting a
9993 dummy statement that just evaluates the size at a safe point
9994 and ensures it is not deferred until e.g. within a deeper
9995 conditional context (c++/43555).
9997 We expect nothing to be needed here for PARM or TYPENAME.
9998 Evaluating the size at this point for TYPENAME would
9999 actually be incorrect, as we might be in the middle of an
10000 expression with side effects on the pointed-to type size
10001 "arguments" prior to the pointer declaration point and the
10002 size evaluation could end up prior to the side effects. */
10004 if (!TYPE_NAME (type
)
10005 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10006 && at_function_scope_p ()
10007 && variably_modified_type_p (type
, NULL_TREE
))
10008 /* Force evaluation of the SAVE_EXPR. */
10009 finish_expr_stmt (TYPE_SIZE (type
));
10011 if (declarator
->kind
== cdk_reference
)
10013 /* In C++0x, the type we are creating a reference to might be
10014 a typedef which is itself a reference type. In that case,
10015 we follow the reference collapsing rules in
10016 [7.1.3/8 dcl.typedef] to create the final reference type:
10018 "If a typedef TD names a type that is a reference to a type
10019 T, an attempt to create the type 'lvalue reference to cv TD'
10020 creates the type 'lvalue reference to T,' while an attempt
10021 to create the type "rvalue reference to cv TD' creates the
10024 if (VOID_TYPE_P (type
))
10025 /* We already gave an error. */;
10026 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10028 if (declarator
->u
.reference
.rvalue_ref
)
10029 /* Leave type alone. */;
10031 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10034 type
= cp_build_reference_type
10035 (type
, declarator
->u
.reference
.rvalue_ref
);
10037 /* In C++0x, we need this check for direct reference to
10038 reference declarations, which are forbidden by
10039 [8.3.2/5 dcl.ref]. Reference to reference declarations
10040 are only allowed indirectly through typedefs and template
10041 type arguments. Example:
10043 void foo(int & &); // invalid ref-to-ref decl
10045 typedef int & int_ref;
10046 void foo(int_ref &); // valid ref-to-ref decl
10048 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10049 error ("cannot declare reference to %q#T, which is not "
10050 "a typedef or a template type argument", type
);
10052 else if (TREE_CODE (type
) == METHOD_TYPE
)
10053 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10054 else if (declarator
->kind
== cdk_ptrmem
)
10056 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10057 != NAMESPACE_DECL
);
10058 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10059 /* We will already have complained. */
10060 type
= error_mark_node
;
10062 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10066 type
= build_pointer_type (type
);
10068 /* Process a list of type modifier keywords (such as
10069 const or volatile) that were given inside the `*' or `&'. */
10071 if (declarator
->u
.pointer
.qualifiers
)
10074 = cp_build_qualified_type (type
,
10075 declarator
->u
.pointer
.qualifiers
);
10076 type_quals
= cp_type_quals (type
);
10079 /* Apply C++11 attributes to the pointer, and not to the
10080 type pointed to. This is unlike what is done for GNU
10081 attributes above. It is to comply with [dcl.ptr]/1:
10083 [the optional attribute-specifier-seq (7.6.1) appertains
10084 to the pointer and not to the object pointed to]. */
10085 if (declarator
->std_attributes
)
10086 decl_attributes (&type
, declarator
->std_attributes
,
10096 gcc_unreachable ();
10100 /* A `constexpr' specifier used in an object declaration declares
10101 the object as `const'. */
10102 if (constexpr_p
&& innermost_code
!= cdk_function
)
10104 if (type_quals
& TYPE_QUAL_VOLATILE
)
10105 error ("both %<volatile%> and %<constexpr%> cannot be used here");
10106 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10108 type_quals
|= TYPE_QUAL_CONST
;
10109 type
= cp_build_qualified_type (type
, type_quals
);
10113 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10114 && TREE_CODE (type
) != FUNCTION_TYPE
10115 && TREE_CODE (type
) != METHOD_TYPE
10116 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10118 error ("template-id %qD used as a declarator",
10120 unqualified_id
= dname
;
10123 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10124 qualified with a class-name, turn it into a METHOD_TYPE, unless
10125 we know that the function is static. We take advantage of this
10126 opportunity to do other processing that pertains to entities
10127 explicitly declared to be class members. Note that if DECLARATOR
10128 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10129 would not have exited the loop above. */
10131 && declarator
->u
.id
.qualifying_scope
10132 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10134 ctype
= declarator
->u
.id
.qualifying_scope
;
10135 ctype
= TYPE_MAIN_VARIANT (ctype
);
10136 template_count
= num_template_headers_for_class (ctype
);
10138 if (ctype
== current_class_type
)
10142 permerror (input_location
, "member functions are implicitly friends of their class");
10146 permerror (declarator
->id_loc
,
10147 "extra qualification %<%T::%> on member %qs",
10150 else if (/* If the qualifying type is already complete, then we
10151 can skip the following checks. */
10152 !COMPLETE_TYPE_P (ctype
)
10153 && (/* If the function is being defined, then
10154 qualifying type must certainly be complete. */
10156 /* A friend declaration of "T::f" is OK, even if
10157 "T" is a template parameter. But, if this
10158 function is not a friend, the qualifying type
10159 must be a class. */
10160 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10161 /* For a declaration, the type need not be
10162 complete, if either it is dependent (since there
10163 is no meaningful definition of complete in that
10164 case) or the qualifying class is currently being
10166 || !(dependent_type_p (ctype
)
10167 || currently_open_class (ctype
)))
10168 /* Check that the qualifying type is complete. */
10169 && !complete_type_or_else (ctype
, NULL_TREE
))
10170 return error_mark_node
;
10171 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10173 if (current_class_type
10174 && (!friendp
|| funcdef_flag
))
10176 error (funcdef_flag
10177 ? G_("cannot define member function %<%T::%s%> "
10179 : G_("cannot declare member function %<%T::%s%> "
10181 ctype
, name
, current_class_type
);
10182 return error_mark_node
;
10185 else if (typedef_p
&& current_class_type
)
10187 error ("cannot declare member %<%T::%s%> within %qT",
10188 ctype
, name
, current_class_type
);
10189 return error_mark_node
;
10193 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10194 ctype
= current_class_type
;
10196 /* Now TYPE has the actual type. */
10198 if (returned_attrs
)
10201 *attrlist
= chainon (returned_attrs
, *attrlist
);
10203 attrlist
= &returned_attrs
;
10207 && declarator
->kind
== cdk_id
10208 && declarator
->std_attributes
)
10209 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10210 a declarator-id appertains to the entity that is declared. */
10211 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10213 /* Handle parameter packs. */
10214 if (parameter_pack_p
)
10216 if (decl_context
== PARM
)
10217 /* Turn the type into a pack expansion.*/
10218 type
= make_pack_expansion (type
);
10220 error ("non-parameter %qs cannot be a parameter pack", name
);
10223 /* Did array size calculations overflow or does the array cover more
10224 than half of the address-space? */
10225 if (TREE_CODE (type
) == ARRAY_TYPE
10226 && COMPLETE_TYPE_P (type
)
10227 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10228 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10230 error ("size of array %qs is too large", name
);
10231 /* If we proceed with the array type as it is, we'll eventually
10232 crash in tree_to_[su]hwi(). */
10233 type
= error_mark_node
;
10236 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10237 && !processing_template_decl
10238 && variably_modified_type_p (type
, NULL_TREE
))
10240 if (decl_context
== FIELD
)
10241 error ("data member may not have variably modified type %qT", type
);
10243 error ("parameter may not have variably modified type %qT", type
);
10244 type
= error_mark_node
;
10247 if (explicitp
== 1 || (explicitp
&& friendp
))
10249 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10250 in the declaration of a constructor or conversion function within
10251 a class definition. */
10252 if (!current_class_type
)
10253 error ("%<explicit%> outside class declaration");
10255 error ("%<explicit%> in friend declaration");
10257 error ("only declarations of constructors and conversion operators "
10258 "can be %<explicit%>");
10262 if (storage_class
== sc_mutable
)
10264 if (decl_context
!= FIELD
|| friendp
)
10266 error ("non-member %qs cannot be declared %<mutable%>", name
);
10267 storage_class
= sc_none
;
10269 else if (decl_context
== TYPENAME
|| typedef_p
)
10271 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10272 storage_class
= sc_none
;
10274 else if (TREE_CODE (type
) == FUNCTION_TYPE
10275 || TREE_CODE (type
) == METHOD_TYPE
)
10277 error ("function %qs cannot be declared %<mutable%>", name
);
10278 storage_class
= sc_none
;
10282 error ("static %qs cannot be declared %<mutable%>", name
);
10283 storage_class
= sc_none
;
10285 else if (type_quals
& TYPE_QUAL_CONST
)
10287 error ("const %qs cannot be declared %<mutable%>", name
);
10288 storage_class
= sc_none
;
10290 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10292 permerror (input_location
, "reference %qs cannot be declared "
10293 "%<mutable%>", name
);
10294 storage_class
= sc_none
;
10298 /* If this is declaring a typedef name, return a TYPE_DECL. */
10299 if (typedef_p
&& decl_context
!= TYPENAME
)
10303 /* Note that the grammar rejects storage classes
10304 in typenames, fields or parameters. */
10305 if (current_lang_name
== lang_name_java
)
10306 TYPE_FOR_JAVA (type
) = 1;
10308 /* This declaration:
10310 typedef void f(int) const;
10312 declares a function type which is not a member of any
10313 particular class, but which is cv-qualified; for
10314 example "f S::*" declares a pointer to a const-qualified
10315 member function of S. We record the cv-qualification in the
10317 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10319 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10321 /* We have now dealt with these qualifiers. */
10322 memfn_quals
= TYPE_UNQUALIFIED
;
10323 rqual
= REF_QUAL_NONE
;
10326 if (type_uses_auto (type
))
10328 error ("typedef declared %<auto%>");
10329 type
= error_mark_node
;
10332 if (decl_context
== FIELD
)
10333 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10335 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10336 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10337 error_at (DECL_SOURCE_LOCATION (decl
),
10338 "typedef name may not be a nested-name-specifier");
10339 TREE_TYPE (decl
) = error_mark_node
;
10342 if (decl_context
!= FIELD
)
10344 if (!current_function_decl
)
10345 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10346 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10347 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10348 (current_function_decl
)))
10349 /* The TYPE_DECL is "abstract" because there will be
10350 clones of this constructor/destructor, and there will
10351 be copies of this TYPE_DECL generated in those
10352 clones. The decloning optimization (for space) may
10353 revert this subsequently if it determines that
10354 the clones should share a common implementation. */
10355 DECL_ABSTRACT_P (decl
) = true;
10357 else if (current_class_type
10358 && constructor_name_p (unqualified_id
, current_class_type
))
10359 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10360 "as enclosing class",
10363 /* If the user declares "typedef struct {...} foo" then the
10364 struct will have an anonymous name. Fill that name in now.
10365 Nothing can refer to it, so nothing needs know about the name
10367 if (type
!= error_mark_node
10369 && TYPE_NAME (type
)
10370 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10371 && TYPE_ANONYMOUS_P (type
)
10372 && declspecs
->type_definition_p
10373 && attributes_naming_typedef_ok (*attrlist
)
10374 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10378 /* Replace the anonymous name with the real name everywhere. */
10379 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10381 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10382 /* We do not rename the debug info representing the
10383 anonymous tagged type because the standard says in
10384 [dcl.typedef] that the naming applies only for
10385 linkage purposes. */
10386 /*debug_hooks->set_name (t, decl);*/
10387 TYPE_NAME (t
) = decl
;
10390 if (TYPE_LANG_SPECIFIC (type
))
10391 TYPE_WAS_ANONYMOUS (type
) = 1;
10393 /* If this is a typedef within a template class, the nested
10394 type is a (non-primary) template. The name for the
10395 template needs updating as well. */
10396 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10397 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10398 = TYPE_IDENTIFIER (type
);
10400 /* Adjust linkage now that we aren't anonymous anymore. */
10401 reset_type_linkage (type
);
10403 /* FIXME remangle member functions; member functions of a
10404 type with external linkage have external linkage. */
10408 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10409 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10411 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10412 memfn_quals
!= TYPE_UNQUALIFIED
,
10413 inlinep
, friendp
, raises
!= NULL_TREE
);
10415 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10416 /* Acknowledge that this was written:
10417 `using analias = atype;'. */
10418 TYPE_DECL_ALIAS_P (decl
) = 1;
10423 /* Detect the case of an array type of unspecified size
10424 which came, as such, direct from a typedef name.
10425 We must copy the type, so that the array's domain can be
10426 individually set by the object's initializer. */
10428 if (type
&& typedef_type
10429 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10430 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10431 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10433 /* Detect where we're using a typedef of function type to declare a
10434 function. PARMS will not be set, so we must create it now. */
10436 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10438 tree decls
= NULL_TREE
;
10441 for (args
= TYPE_ARG_TYPES (type
);
10442 args
&& args
!= void_list_node
;
10443 args
= TREE_CHAIN (args
))
10445 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10447 DECL_CHAIN (decl
) = decls
;
10451 parms
= nreverse (decls
);
10453 if (decl_context
!= TYPENAME
)
10455 /* The qualifiers on the function type become the qualifiers on
10456 the non-static member function. */
10457 memfn_quals
|= type_memfn_quals (type
);
10458 rqual
= type_memfn_rqual (type
);
10459 type_quals
= TYPE_UNQUALIFIED
;
10463 /* If this is a type name (such as, in a cast or sizeof),
10464 compute the type and return it now. */
10466 if (decl_context
== TYPENAME
)
10468 /* Note that the grammar rejects storage classes
10469 in typenames, fields or parameters. */
10470 if (type_quals
!= TYPE_UNQUALIFIED
)
10471 type_quals
= TYPE_UNQUALIFIED
;
10473 /* Special case: "friend class foo" looks like a TYPENAME context. */
10476 if (type_quals
!= TYPE_UNQUALIFIED
)
10478 error ("type qualifiers specified for friend class declaration");
10479 type_quals
= TYPE_UNQUALIFIED
;
10483 error ("%<inline%> specified for friend class declaration");
10489 /* Don't allow friend declaration without a class-key. */
10490 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10491 permerror (input_location
, "template parameters cannot be friends");
10492 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10493 permerror (input_location
, "friend declaration requires class-key, "
10494 "i.e. %<friend class %T::%D%>",
10495 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10497 permerror (input_location
, "friend declaration requires class-key, "
10498 "i.e. %<friend %#T%>",
10502 /* Only try to do this stuff if we didn't already give up. */
10503 if (type
!= integer_type_node
)
10505 /* A friendly class? */
10506 if (current_class_type
)
10507 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10508 /*complain=*/true);
10510 error ("trying to make class %qT a friend of global scope",
10513 type
= void_type_node
;
10516 else if (memfn_quals
|| rqual
)
10518 if (ctype
== NULL_TREE
10519 && TREE_CODE (type
) == METHOD_TYPE
)
10520 ctype
= TYPE_METHOD_BASETYPE (type
);
10523 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10524 /* Core issue #547: need to allow this in template type args.
10525 Allow it in general in C++11 for alias-declarations. */
10526 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10527 && TREE_CODE (type
) == FUNCTION_TYPE
)
10528 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10530 error ("invalid qualifiers on non-member function type");
10535 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10536 && decl_context
!= CATCHPARM
10537 && TREE_CODE (type
) != UNION_TYPE
10540 error ("abstract declarator %qT used as declaration", type
);
10541 return error_mark_node
;
10544 /* Only functions may be declared using an operator-function-id. */
10546 && IDENTIFIER_OPNAME_P (unqualified_id
)
10547 && TREE_CODE (type
) != FUNCTION_TYPE
10548 && TREE_CODE (type
) != METHOD_TYPE
)
10550 error ("declaration of %qD as non-function", unqualified_id
);
10551 return error_mark_node
;
10554 /* We don't check parameter types here because we can emit a better
10555 error message later. */
10556 if (decl_context
!= PARM
)
10558 type
= check_var_type (unqualified_id
, type
);
10559 if (type
== error_mark_node
)
10560 return error_mark_node
;
10563 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10564 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10566 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10568 if (ctype
|| in_namespace
)
10569 error ("cannot use %<::%> in parameter declaration");
10571 if (type_uses_auto (type
))
10573 if (cxx_dialect
>= cxx14
)
10574 error ("%<auto%> parameter not permitted in this context");
10576 error ("parameter declared %<auto%>");
10577 type
= error_mark_node
;
10580 /* A parameter declared as an array of T is really a pointer to T.
10581 One declared as a function is really a pointer to a function.
10582 One declared as a member is really a pointer to member. */
10584 if (TREE_CODE (type
) == ARRAY_TYPE
)
10586 /* Transfer const-ness of array into that of type pointed to. */
10587 type
= build_pointer_type (TREE_TYPE (type
));
10588 type_quals
= TYPE_UNQUALIFIED
;
10589 array_parameter_p
= true;
10591 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10592 type
= build_pointer_type (type
);
10595 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10596 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10598 cp_cv_quals real_quals
= memfn_quals
;
10599 if (cxx_dialect
< cxx14
&& constexpr_p
10600 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10601 real_quals
|= TYPE_QUAL_CONST
;
10602 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10608 if (decl_context
== PARM
)
10610 decl
= cp_build_parm_decl (unqualified_id
, type
);
10611 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10613 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10614 memfn_quals
!= TYPE_UNQUALIFIED
,
10615 inlinep
, friendp
, raises
!= NULL_TREE
);
10617 else if (decl_context
== FIELD
)
10619 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10620 && type_uses_auto (type
))
10622 error ("non-static data member declared %<auto%>");
10623 type
= error_mark_node
;
10626 /* The C99 flexible array extension. */
10627 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10628 && TYPE_DOMAIN (type
) == NULL_TREE
)
10630 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10631 tf_warning_or_error
);
10632 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10635 if (type
== error_mark_node
)
10637 /* Happens when declaring arrays of sizes which
10638 are error_mark_node, for example. */
10641 else if (in_namespace
&& !friendp
)
10643 /* Something like struct S { int N::j; }; */
10644 error ("invalid use of %<::%>");
10645 return error_mark_node
;
10647 else if (TREE_CODE (type
) == FUNCTION_TYPE
10648 || TREE_CODE (type
) == METHOD_TYPE
)
10651 tree function_context
;
10655 /* This should never happen in pure C++ (the check
10656 could be an assert). It could happen in
10657 Objective-C++ if someone writes invalid code that
10658 uses a function declaration for an instance
10659 variable or property (instance variables and
10660 properties are parsed as FIELD_DECLs, but they are
10661 part of an Objective-C class, not a C++ class).
10662 That code is invalid and is caught by this
10666 error ("declaration of function %qD in invalid context",
10668 return error_mark_node
;
10671 /* ``A union may [ ... ] not [ have ] virtual functions.''
10673 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10675 error ("function %qD declared virtual inside a union",
10677 return error_mark_node
;
10680 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10684 error ("%qD cannot be declared virtual, since it "
10685 "is always static",
10692 /* Check that the name used for a destructor makes sense. */
10693 if (sfk
== sfk_destructor
)
10695 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10699 gcc_assert (friendp
);
10700 error ("expected qualified name in friend declaration "
10701 "for destructor %qD", uqname
);
10702 return error_mark_node
;
10705 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10707 error ("declaration of %qD as member of %qT",
10709 return error_mark_node
;
10713 error ("a destructor cannot be %<constexpr%>");
10714 return error_mark_node
;
10717 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10719 error ("expected qualified name in friend declaration "
10720 "for constructor %qD",
10721 id_declarator
->u
.id
.unqualified_name
);
10722 return error_mark_node
;
10725 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10727 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10728 if (variable_template_p (tmpl
))
10730 error ("specialization of variable template %qD "
10731 "declared as function", tmpl
);
10732 inform (DECL_SOURCE_LOCATION (tmpl
),
10733 "variable template declared here");
10734 return error_mark_node
;
10738 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10739 function_context
= (ctype
!= NULL_TREE
) ?
10740 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10741 publicp
= (! friendp
|| ! staticp
)
10742 && function_context
== NULL_TREE
;
10744 if (late_return_type_p
)
10745 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10747 decl
= grokfndecl (ctype
, type
,
10748 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10749 ? unqualified_id
: dname
,
10752 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10753 friendp
? -1 : 0, friendp
, publicp
,
10754 inlinep
| (2 * constexpr_p
),
10755 initialized
== SD_DELETED
, sfk
,
10756 funcdef_flag
, template_count
, in_namespace
,
10757 attrlist
, declarator
->id_loc
);
10758 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10759 if (decl
== NULL_TREE
)
10760 return error_mark_node
;
10762 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10763 /* The decl and setting of decl_attr is also turned off. */
10764 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10767 /* [class.conv.ctor]
10769 A constructor declared without the function-specifier
10770 explicit that can be called with a single parameter
10771 specifies a conversion from the type of its first
10772 parameter to the type of its class. Such a constructor
10773 is called a converting constructor. */
10774 if (explicitp
== 2)
10775 DECL_NONCONVERTING_P (decl
) = 1;
10777 else if (!staticp
&& !dependent_type_p (type
)
10778 && !COMPLETE_TYPE_P (complete_type (type
))
10779 && (TREE_CODE (type
) != ARRAY_TYPE
10780 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10781 || initialized
== 0))
10783 if (unqualified_id
)
10785 error ("field %qD has incomplete type %qT",
10786 unqualified_id
, type
);
10787 cxx_incomplete_type_inform (strip_array_types (type
));
10790 error ("name %qT has incomplete type", type
);
10792 type
= error_mark_node
;
10799 error ("%qE is neither function nor member function; "
10800 "cannot be declared friend", unqualified_id
);
10808 /* Friends are treated specially. */
10809 if (ctype
== current_class_type
)
10810 ; /* We already issued a permerror. */
10811 else if (decl
&& DECL_NAME (decl
))
10813 if (template_class_depth (current_class_type
) == 0)
10815 decl
= check_explicit_specialization
10816 (unqualified_id
, decl
, template_count
,
10817 2 * funcdef_flag
+ 4);
10818 if (decl
== error_mark_node
)
10819 return error_mark_node
;
10822 decl
= do_friend (ctype
, unqualified_id
, decl
,
10828 return error_mark_node
;
10831 /* Structure field. It may not be a function, except for C++. */
10833 if (decl
== NULL_TREE
)
10837 /* C++ allows static class members. All other work
10838 for this is done by grokfield. */
10839 decl
= build_lang_decl_loc (declarator
10840 ? declarator
->id_loc
10842 VAR_DECL
, unqualified_id
, type
);
10843 set_linkage_for_static_data_member (decl
);
10844 /* Even if there is an in-class initialization, DECL
10845 is considered undefined until an out-of-class
10846 definition is provided. */
10847 DECL_EXTERNAL (decl
) = 1;
10851 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10852 if (declspecs
->gnu_thread_keyword_p
)
10853 DECL_GNU_TLS_P (decl
) = true;
10856 if (constexpr_p
&& !initialized
)
10858 error ("constexpr static data member %qD must have an "
10859 "initializer", decl
);
10860 constexpr_p
= false;
10867 error ("non-static data member %qE declared %<constexpr%>",
10869 constexpr_p
= false;
10871 decl
= build_decl (input_location
,
10872 FIELD_DECL
, unqualified_id
, type
);
10873 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10874 if (bitfield
&& !unqualified_id
)
10875 TREE_NO_WARNING (decl
) = 1;
10877 if (storage_class
== sc_mutable
)
10879 DECL_MUTABLE_P (decl
) = 1;
10880 storage_class
= sc_none
;
10885 /* An attempt is being made to initialize a non-static
10886 member. This is new in C++11. */
10887 maybe_warn_cpp0x (CPP0X_NSDMI
);
10889 /* If this has been parsed with static storage class, but
10890 errors forced staticp to be cleared, ensure NSDMI is
10892 if (declspecs
->storage_class
== sc_static
)
10893 DECL_INITIAL (decl
) = error_mark_node
;
10897 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10898 memfn_quals
!= TYPE_UNQUALIFIED
,
10899 inlinep
, friendp
, raises
!= NULL_TREE
);
10902 else if (TREE_CODE (type
) == FUNCTION_TYPE
10903 || TREE_CODE (type
) == METHOD_TYPE
)
10905 tree original_name
;
10908 if (!unqualified_id
)
10909 return error_mark_node
;
10911 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10912 original_name
= dname
;
10914 original_name
= unqualified_id
;
10916 if (storage_class
== sc_auto
)
10917 error ("storage class %<auto%> invalid for function %qs", name
);
10918 else if (storage_class
== sc_register
)
10919 error ("storage class %<register%> invalid for function %qs", name
);
10922 if (declspecs
->gnu_thread_keyword_p
)
10923 error ("storage class %<__thread%> invalid for function %qs",
10926 error ("storage class %<thread_local%> invalid for function %qs",
10930 if (virt_specifiers
)
10931 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10932 /* Function declaration not at top level.
10933 Storage classes other than `extern' are not allowed
10934 and `extern' makes no difference. */
10935 if (! toplevel_bindings_p ()
10936 && (storage_class
== sc_static
10937 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10940 if (storage_class
== sc_static
)
10941 pedwarn (input_location
, OPT_Wpedantic
,
10942 "%<static%> specified invalid for function %qs "
10943 "declared out of global scope", name
);
10945 pedwarn (input_location
, OPT_Wpedantic
,
10946 "%<inline%> specifier invalid for function %qs "
10947 "declared out of global scope", name
);
10950 if (ctype
== NULL_TREE
)
10954 error ("virtual non-class function %qs", name
);
10957 else if (sfk
== sfk_constructor
10958 || sfk
== sfk_destructor
)
10960 error (funcdef_flag
10961 ? G_("%qs defined in a non-class scope")
10962 : G_("%qs declared in a non-class scope"), name
);
10967 /* Record whether the function is public. */
10968 publicp
= (ctype
!= NULL_TREE
10969 || storage_class
!= sc_static
);
10971 if (late_return_type_p
)
10972 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10974 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10975 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10977 publicp
, inlinep
| (2 * constexpr_p
),
10978 initialized
== SD_DELETED
, sfk
,
10980 template_count
, in_namespace
, attrlist
,
10981 declarator
->id_loc
);
10982 if (decl
== NULL_TREE
)
10983 return error_mark_node
;
10987 int invalid_static
= 0;
10989 /* Don't allow a static member function in a class, and forbid
10990 declaring main to be static. */
10991 if (TREE_CODE (type
) == METHOD_TYPE
)
10993 permerror (input_location
, "cannot declare member function %qD to have "
10994 "static linkage", decl
);
10995 invalid_static
= 1;
10997 else if (current_function_decl
)
10999 /* FIXME need arm citation */
11000 error ("cannot declare static function inside another function");
11001 invalid_static
= 1;
11004 if (invalid_static
)
11007 storage_class
= sc_none
;
11013 /* It's a variable. */
11015 /* An uninitialized decl with `extern' is a reference. */
11016 decl
= grokvardecl (type
, dname
, unqualified_id
,
11019 (type_quals
& TYPE_QUAL_CONST
) != 0,
11021 ctype
? ctype
: in_namespace
);
11022 if (decl
== NULL_TREE
)
11023 return error_mark_node
;
11025 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11026 memfn_quals
!= TYPE_UNQUALIFIED
,
11027 inlinep
, friendp
, raises
!= NULL_TREE
);
11031 DECL_CONTEXT (decl
) = ctype
;
11034 permerror (input_location
, "%<static%> may not be used when defining "
11035 "(as opposed to declaring) a static data member");
11037 storage_class
= sc_none
;
11039 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11041 error ("static member %qD declared %<register%>", decl
);
11042 storage_class
= sc_none
;
11044 if (storage_class
== sc_extern
&& pedantic
)
11046 pedwarn (input_location
, OPT_Wpedantic
,
11047 "cannot explicitly declare member %q#D to have "
11048 "extern linkage", decl
);
11049 storage_class
= sc_none
;
11052 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11054 error ("declaration of constexpr variable %qD is not a definition",
11056 constexpr_p
= false;
11060 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11062 if (toplevel_bindings_p ())
11064 /* It's common practice (and completely valid) to have a const
11065 be initialized and declared extern. */
11066 if (!(type_quals
& TYPE_QUAL_CONST
))
11067 warning (0, "%qs initialized and declared %<extern%>", name
);
11071 error ("%qs has both %<extern%> and initializer", name
);
11072 return error_mark_node
;
11076 /* Record `register' declaration for warnings on &
11077 and in case doing stupid register allocation. */
11079 if (storage_class
== sc_register
)
11080 DECL_REGISTER (decl
) = 1;
11081 else if (storage_class
== sc_extern
)
11082 DECL_THIS_EXTERN (decl
) = 1;
11083 else if (storage_class
== sc_static
)
11084 DECL_THIS_STATIC (decl
) = 1;
11086 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11087 if (constexpr_p
&& VAR_P (decl
))
11088 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11090 /* Record constancy and volatility on the DECL itself . There's
11091 no need to do this when processing a template; we'll do this
11092 for the instantiated declaration based on the type of DECL. */
11093 if (!processing_template_decl
)
11094 cp_apply_type_quals_to_decl (type_quals
, decl
);
11100 /* Subroutine of start_function. Ensure that each of the parameter
11101 types (as listed in PARMS) is complete, as is required for a
11102 function definition. */
11105 require_complete_types_for_parms (tree parms
)
11107 for (; parms
; parms
= DECL_CHAIN (parms
))
11109 if (dependent_type_p (TREE_TYPE (parms
)))
11111 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11112 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11114 relayout_decl (parms
);
11115 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11118 /* grokparms or complete_type_or_else will have already issued
11120 TREE_TYPE (parms
) = error_mark_node
;
11124 /* Returns nonzero if T is a local variable. */
11127 local_variable_p (const_tree t
)
11130 /* A VAR_DECL with a context that is a _TYPE is a static data
11132 && !TYPE_P (CP_DECL_CONTEXT (t
))
11133 /* Any other non-local variable must be at namespace scope. */
11134 && !DECL_NAMESPACE_SCOPE_P (t
))
11135 || (TREE_CODE (t
) == PARM_DECL
))
11141 /* Like local_variable_p, but suitable for use as a tree-walking
11145 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11148 if (local_variable_p (*tp
)
11149 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11151 else if (TYPE_P (*tp
))
11152 *walk_subtrees
= 0;
11157 /* Check that ARG, which is a default-argument expression for a
11158 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11159 something goes wrong. DECL may also be a _TYPE node, rather than a
11160 DECL, if there is no DECL available. */
11163 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11168 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11169 /* We get a DEFAULT_ARG when looking at an in-class declaration
11170 with a default argument. Ignore the argument for now; we'll
11171 deal with it after the class is complete. */
11180 decl_type
= TREE_TYPE (decl
);
11182 if (arg
== error_mark_node
11183 || decl
== error_mark_node
11184 || TREE_TYPE (arg
) == error_mark_node
11185 || decl_type
== error_mark_node
)
11186 /* Something already went wrong. There's no need to check
11188 return error_mark_node
;
11190 /* [dcl.fct.default]
11192 A default argument expression is implicitly converted to the
11194 ++cp_unevaluated_operand
;
11195 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11197 --cp_unevaluated_operand
;
11199 if (warn_zero_as_null_pointer_constant
11200 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11201 && null_ptr_cst_p (arg
)
11202 && (complain
& tf_warning
)
11203 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11204 return nullptr_node
;
11206 /* [dcl.fct.default]
11208 Local variables shall not be used in default argument
11211 The keyword `this' shall not be used in a default argument of a
11212 member function. */
11213 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11216 if (complain
& tf_warning_or_error
)
11218 if (DECL_NAME (var
) == this_identifier
)
11219 permerror (input_location
, "default argument %qE uses %qD",
11222 error ("default argument %qE uses local variable %qD", arg
, var
);
11224 return error_mark_node
;
11231 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11234 type_is_deprecated (tree type
)
11236 enum tree_code code
;
11237 if (TREE_DEPRECATED (type
))
11239 if (TYPE_NAME (type
)
11240 && TREE_DEPRECATED (TYPE_NAME (type
)))
11243 /* Do warn about using typedefs to a deprecated class. */
11244 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11245 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11247 code
= TREE_CODE (type
);
11249 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11250 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11251 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11252 return type_is_deprecated (TREE_TYPE (type
));
11254 if (TYPE_PTRMEMFUNC_P (type
))
11255 return type_is_deprecated
11256 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11261 /* Decode the list of parameter types for a function type.
11262 Given the list of things declared inside the parens,
11263 return a list of types.
11265 If this parameter does not end with an ellipsis, we append
11268 *PARMS is set to the chain of PARM_DECLs created. */
11271 grokparms (tree parmlist
, tree
*parms
)
11273 tree result
= NULL_TREE
;
11274 tree decls
= NULL_TREE
;
11278 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11280 tree type
= NULL_TREE
;
11281 tree init
= TREE_PURPOSE (parm
);
11282 tree decl
= TREE_VALUE (parm
);
11283 const char *errmsg
;
11285 if (parm
== void_list_node
)
11288 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11291 type
= TREE_TYPE (decl
);
11292 if (VOID_TYPE_P (type
))
11294 if (same_type_p (type
, void_type_node
)
11296 && !DECL_NAME (decl
) && !result
11297 && TREE_CHAIN (parm
) == void_list_node
)
11298 /* DR 577: A parameter list consisting of a single
11299 unnamed parameter of non-dependent type 'void'. */
11301 else if (cv_qualified_p (type
))
11302 error_at (DECL_SOURCE_LOCATION (decl
),
11303 "invalid use of cv-qualified type %qT in "
11304 "parameter declaration", type
);
11306 error_at (DECL_SOURCE_LOCATION (decl
),
11307 "invalid use of type %<void%> in parameter "
11309 /* It's not a good idea to actually create parameters of
11310 type `void'; other parts of the compiler assume that a
11311 void type terminates the parameter list. */
11312 type
= error_mark_node
;
11313 TREE_TYPE (decl
) = error_mark_node
;
11316 if (type
!= error_mark_node
11317 && TYPE_FOR_JAVA (type
)
11318 && MAYBE_CLASS_TYPE_P (type
))
11320 error ("parameter %qD has Java class type", decl
);
11321 type
= error_mark_node
;
11322 TREE_TYPE (decl
) = error_mark_node
;
11326 if (type
!= error_mark_node
11327 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11330 type
= error_mark_node
;
11331 TREE_TYPE (decl
) = error_mark_node
;
11334 if (type
!= error_mark_node
)
11336 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11338 tree deptype
= type_is_deprecated (type
);
11340 warn_deprecated_use (deptype
, NULL_TREE
);
11343 /* Top-level qualifiers on the parameters are
11344 ignored for function types. */
11345 type
= cp_build_qualified_type (type
, 0);
11346 if (TREE_CODE (type
) == METHOD_TYPE
)
11348 error ("parameter %qD invalidly declared method type", decl
);
11349 type
= build_pointer_type (type
);
11350 TREE_TYPE (decl
) = type
;
11352 else if (abstract_virtuals_error (decl
, type
))
11353 any_error
= 1; /* Seems like a good idea. */
11354 else if (POINTER_TYPE_P (type
))
11356 /* [dcl.fct]/6, parameter types cannot contain pointers
11357 (references) to arrays of unknown bound. */
11358 tree t
= TREE_TYPE (type
);
11359 int ptr
= TYPE_PTR_P (type
);
11363 if (TYPE_PTR_P (t
))
11365 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11367 else if (!TYPE_DOMAIN (t
))
11371 if (TREE_CODE (t
) == ARRAY_TYPE
)
11373 ? G_("parameter %qD includes pointer to array of "
11374 "unknown bound %qT")
11375 : G_("parameter %qD includes reference to array of "
11376 "unknown bound %qT"),
11382 else if (init
&& !processing_template_decl
)
11383 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11386 DECL_CHAIN (decl
) = decls
;
11388 result
= tree_cons (init
, type
, result
);
11390 decls
= nreverse (decls
);
11391 result
= nreverse (result
);
11393 result
= chainon (result
, void_list_node
);
11400 /* D is a constructor or overloaded `operator='.
11402 Let T be the class in which D is declared. Then, this function
11405 -1 if D's is an ill-formed constructor or copy assignment operator
11406 whose first parameter is of type `T'.
11407 0 if D is not a copy constructor or copy assignment
11409 1 if D is a copy constructor or copy assignment operator whose
11410 first parameter is a reference to non-const qualified T.
11411 2 if D is a copy constructor or copy assignment operator whose
11412 first parameter is a reference to const qualified T.
11414 This function can be used as a predicate. Positive values indicate
11415 a copy constructor and nonzero values indicate a copy assignment
11419 copy_fn_p (const_tree d
)
11425 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11427 if (TREE_CODE (d
) == TEMPLATE_DECL
11428 || (DECL_TEMPLATE_INFO (d
)
11429 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11430 /* Instantiations of template member functions are never copy
11431 functions. Note that member functions of templated classes are
11432 represented as template functions internally, and we must
11433 accept those as copy functions. */
11436 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11440 arg_type
= TREE_VALUE (args
);
11441 if (arg_type
== error_mark_node
)
11444 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11446 /* Pass by value copy assignment operator. */
11449 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11450 && !TYPE_REF_IS_RVALUE (arg_type
)
11451 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11453 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11459 args
= TREE_CHAIN (args
);
11461 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11462 /* There are more non-optional args. */
11468 /* D is a constructor or overloaded `operator='.
11470 Let T be the class in which D is declared. Then, this function
11471 returns true when D is a move constructor or move assignment
11472 operator, false otherwise. */
11475 move_fn_p (const_tree d
)
11477 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11479 if (cxx_dialect
== cxx98
)
11480 /* There are no move constructors if we are in C++98 mode. */
11483 if (TREE_CODE (d
) == TEMPLATE_DECL
11484 || (DECL_TEMPLATE_INFO (d
)
11485 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11486 /* Instantiations of template member functions are never move
11487 functions. Note that member functions of templated classes are
11488 represented as template functions internally, and we must
11489 accept those as move functions. */
11492 return move_signature_fn_p (d
);
11495 /* D is a constructor or overloaded `operator='.
11497 Then, this function returns true when D has the same signature as a move
11498 constructor or move assignment operator (because either it is such a
11499 ctor/op= or it is a template specialization with the same signature),
11500 false otherwise. */
11503 move_signature_fn_p (const_tree d
)
11507 bool result
= false;
11509 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11513 arg_type
= TREE_VALUE (args
);
11514 if (arg_type
== error_mark_node
)
11517 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11518 && TYPE_REF_IS_RVALUE (arg_type
)
11519 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11523 args
= TREE_CHAIN (args
);
11525 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11526 /* There are more non-optional args. */
11532 /* Remember any special properties of member function DECL. */
11535 grok_special_member_properties (tree decl
)
11539 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11542 class_type
= DECL_CONTEXT (decl
);
11543 if (DECL_CONSTRUCTOR_P (decl
))
11545 int ctor
= copy_fn_p (decl
);
11547 if (!DECL_ARTIFICIAL (decl
))
11548 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11554 A non-template constructor for class X is a copy
11555 constructor if its first parameter is of type X&, const
11556 X&, volatile X& or const volatile X&, and either there
11557 are no other parameters or else all other parameters have
11558 default arguments. */
11559 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11560 if (user_provided_p (decl
))
11561 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11563 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11565 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11566 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11567 else if (move_fn_p (decl
) && user_provided_p (decl
))
11568 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11569 else if (is_list_ctor (decl
))
11570 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11572 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11573 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11574 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11576 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11580 A non-template assignment operator for class X is a copy
11581 assignment operator if its parameter is of type X, X&, const
11582 X&, volatile X& or const volatile X&. */
11584 int assop
= copy_fn_p (decl
);
11588 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11589 if (user_provided_p (decl
))
11590 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11592 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11594 else if (move_fn_p (decl
) && user_provided_p (decl
))
11595 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11597 /* Destructors are handled in check_methods. */
11600 /* Check a constructor DECL has the correct form. Complains
11601 if the class has a constructor of the form X(X). */
11604 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11606 int ctor_parm
= copy_fn_p (decl
);
11612 A declaration of a constructor for a class X is ill-formed if
11613 its first parameter is of type (optionally cv-qualified) X
11614 and either there are no other parameters or else all other
11615 parameters have default arguments.
11617 We *don't* complain about member template instantiations that
11618 have this form, though; they can occur as we try to decide
11619 what constructor to use during overload resolution. Since
11620 overload resolution will never prefer such a constructor to
11621 the non-template copy constructor (which is either explicitly
11622 or implicitly defined), there's no need to worry about their
11623 existence. Theoretically, they should never even be
11624 instantiated, but that's hard to forestall. */
11625 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11633 /* An operator with this code is unary, but can also be binary. */
11636 ambi_op_p (enum tree_code code
)
11638 return (code
== INDIRECT_REF
11639 || code
== ADDR_EXPR
11640 || code
== UNARY_PLUS_EXPR
11641 || code
== NEGATE_EXPR
11642 || code
== PREINCREMENT_EXPR
11643 || code
== PREDECREMENT_EXPR
);
11646 /* An operator with this name can only be unary. */
11649 unary_op_p (enum tree_code code
)
11651 return (code
== TRUTH_NOT_EXPR
11652 || code
== BIT_NOT_EXPR
11653 || code
== COMPONENT_REF
11654 || code
== TYPE_EXPR
);
11657 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11658 errors are issued for invalid declarations. */
11661 grok_op_properties (tree decl
, bool complain
)
11663 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11665 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11666 tree name
= DECL_NAME (decl
);
11667 enum tree_code operator_code
;
11672 /* Count the number of arguments and check for ellipsis. */
11673 for (argtype
= argtypes
, arity
= 0;
11674 argtype
&& argtype
!= void_list_node
;
11675 argtype
= TREE_CHAIN (argtype
))
11677 ellipsis_p
= !argtype
;
11679 class_type
= DECL_CONTEXT (decl
);
11680 if (class_type
&& !CLASS_TYPE_P (class_type
))
11681 class_type
= NULL_TREE
;
11683 if (DECL_CONV_FN_P (decl
))
11684 operator_code
= TYPE_EXPR
;
11688 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11689 if (ansi_opname (CODE) == name) \
11691 operator_code = (CODE); \
11694 else if (ansi_assopname (CODE) == name) \
11696 operator_code = (CODE); \
11697 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11701 #include "operators.def"
11702 #undef DEF_OPERATOR
11704 gcc_unreachable ();
11707 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11708 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11711 switch (operator_code
)
11714 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11718 TYPE_GETS_DELETE (class_type
) |= 1;
11722 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11725 case VEC_DELETE_EXPR
:
11726 TYPE_GETS_DELETE (class_type
) |= 2;
11733 /* [basic.std.dynamic.allocation]/1:
11735 A program is ill-formed if an allocation function is declared
11736 in a namespace scope other than global scope or declared static
11739 The same also holds true for deallocation functions. */
11740 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11741 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11743 if (DECL_NAMESPACE_SCOPE_P (decl
))
11745 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11747 error ("%qD may not be declared within a namespace", decl
);
11750 else if (!TREE_PUBLIC (decl
))
11752 error ("%qD may not be declared as static", decl
);
11755 if (!flag_sized_deallocation
&& warn_cxx14_compat
)
11757 tree parm
= FUNCTION_ARG_CHAIN (decl
);
11758 if (parm
&& same_type_p (TREE_VALUE (parm
), size_type_node
)
11759 && TREE_CHAIN (parm
) == void_list_node
)
11760 warning_at (DECL_SOURCE_LOCATION (decl
), OPT_Wc__14_compat
,
11761 "%qD is a usual (non-placement) deallocation "
11762 "function in C++14 (or with -fsized-deallocation)",
11768 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11770 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11771 DECL_IS_OPERATOR_NEW (decl
) = 1;
11773 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11774 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11777 /* An operator function must either be a non-static member function
11778 or have at least one parameter of a class, a reference to a class,
11779 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11780 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11782 if (operator_code
== TYPE_EXPR
11783 || operator_code
== CALL_EXPR
11784 || operator_code
== COMPONENT_REF
11785 || operator_code
== ARRAY_REF
11786 || operator_code
== NOP_EXPR
)
11788 error ("%qD must be a nonstatic member function", decl
);
11795 if (DECL_STATIC_FUNCTION_P (decl
))
11797 error ("%qD must be either a non-static member "
11798 "function or a non-member function", decl
);
11802 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11804 tree arg
= non_reference (TREE_VALUE (p
));
11805 if (arg
== error_mark_node
)
11808 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11809 because these checks are performed even on
11810 template functions. */
11811 if (MAYBE_CLASS_TYPE_P (arg
)
11812 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11816 if (!p
|| p
== void_list_node
)
11819 error ("%qD must have an argument of class or "
11820 "enumerated type", decl
);
11826 /* There are no restrictions on the arguments to an overloaded
11828 if (operator_code
== CALL_EXPR
)
11831 /* Warn about conversion operators that will never be used. */
11832 if (IDENTIFIER_TYPENAME_P (name
)
11833 && ! DECL_TEMPLATE_INFO (decl
)
11835 /* Warn only declaring the function; there is no need to
11836 warn again about out-of-class definitions. */
11837 && class_type
== current_class_type
)
11839 tree t
= TREE_TYPE (name
);
11840 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11843 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11845 if (VOID_TYPE_P (t
))
11846 warning (OPT_Wconversion
,
11848 ? G_("conversion to a reference to void "
11849 "will never use a type conversion operator")
11850 : G_("conversion to void "
11851 "will never use a type conversion operator"));
11852 else if (class_type
)
11854 if (t
== class_type
)
11855 warning (OPT_Wconversion
,
11857 ? G_("conversion to a reference to the same type "
11858 "will never use a type conversion operator")
11859 : G_("conversion to the same type "
11860 "will never use a type conversion operator"));
11861 /* Don't force t to be complete here. */
11862 else if (MAYBE_CLASS_TYPE_P (t
)
11863 && COMPLETE_TYPE_P (t
)
11864 && DERIVED_FROM_P (t
, class_type
))
11865 warning (OPT_Wconversion
,
11867 ? G_("conversion to a reference to a base class "
11868 "will never use a type conversion operator")
11869 : G_("conversion to a base class "
11870 "will never use a type conversion operator"));
11875 if (operator_code
== COND_EXPR
)
11878 error ("ISO C++ prohibits overloading operator ?:");
11881 else if (ellipsis_p
)
11883 error ("%qD must not have variable number of arguments", decl
);
11886 else if (ambi_op_p (operator_code
))
11889 /* We pick the one-argument operator codes by default, so
11890 we don't have to change anything. */
11892 else if (arity
== 2)
11894 /* If we thought this was a unary operator, we now know
11895 it to be a binary operator. */
11896 switch (operator_code
)
11899 operator_code
= MULT_EXPR
;
11903 operator_code
= BIT_AND_EXPR
;
11906 case UNARY_PLUS_EXPR
:
11907 operator_code
= PLUS_EXPR
;
11911 operator_code
= MINUS_EXPR
;
11914 case PREINCREMENT_EXPR
:
11915 operator_code
= POSTINCREMENT_EXPR
;
11918 case PREDECREMENT_EXPR
:
11919 operator_code
= POSTDECREMENT_EXPR
;
11923 gcc_unreachable ();
11926 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11928 if ((operator_code
== POSTINCREMENT_EXPR
11929 || operator_code
== POSTDECREMENT_EXPR
)
11930 && ! processing_template_decl
11931 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11934 error ("postfix %qD must take %<int%> as its argument",
11937 error ("postfix %qD must take %<int%> as its second "
11945 error ("%qD must take either zero or one argument", decl
);
11947 error ("%qD must take either one or two arguments", decl
);
11951 /* More Effective C++ rule 6. */
11953 && (operator_code
== POSTINCREMENT_EXPR
11954 || operator_code
== POSTDECREMENT_EXPR
11955 || operator_code
== PREINCREMENT_EXPR
11956 || operator_code
== PREDECREMENT_EXPR
))
11958 tree arg
= TREE_VALUE (argtypes
);
11959 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11960 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11961 arg
= TREE_TYPE (arg
);
11962 arg
= TYPE_MAIN_VARIANT (arg
);
11963 if (operator_code
== PREINCREMENT_EXPR
11964 || operator_code
== PREDECREMENT_EXPR
)
11966 if (TREE_CODE (ret
) != REFERENCE_TYPE
11967 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11969 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11970 build_reference_type (arg
));
11974 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11975 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11979 else if (unary_op_p (operator_code
))
11984 error ("%qD must take %<void%>", decl
);
11986 error ("%qD must take exactly one argument", decl
);
11990 else /* if (binary_op_p (operator_code)) */
11995 error ("%qD must take exactly one argument", decl
);
11997 error ("%qD must take exactly two arguments", decl
);
12001 /* More Effective C++ rule 7. */
12003 && (operator_code
== TRUTH_ANDIF_EXPR
12004 || operator_code
== TRUTH_ORIF_EXPR
12005 || operator_code
== COMPOUND_EXPR
))
12006 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12010 /* Effective C++ rule 23. */
12013 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12014 && (operator_code
== PLUS_EXPR
12015 || operator_code
== MINUS_EXPR
12016 || operator_code
== TRUNC_DIV_EXPR
12017 || operator_code
== MULT_EXPR
12018 || operator_code
== TRUNC_MOD_EXPR
)
12019 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12020 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12022 /* [over.oper]/8 */
12023 for (; argtypes
&& argtypes
!= void_list_node
;
12024 argtypes
= TREE_CHAIN (argtypes
))
12025 if (TREE_PURPOSE (argtypes
))
12027 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12028 if (operator_code
== POSTINCREMENT_EXPR
12029 || operator_code
== POSTDECREMENT_EXPR
)
12031 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12036 error ("%qD cannot have default arguments", decl
);
12044 /* Return a string giving the keyword associate with CODE. */
12046 static const char *
12047 tag_name (enum tag_types code
)
12059 case typename_type
:
12062 gcc_unreachable ();
12066 /* Name lookup in an elaborated-type-specifier (after the keyword
12067 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12068 elaborated-type-specifier is invalid, issue a diagnostic and return
12069 error_mark_node; otherwise, return the *_TYPE to which it referred.
12070 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12073 check_elaborated_type_specifier (enum tag_types tag_code
,
12075 bool allow_template_p
)
12081 struct S { struct S *p; };
12083 name lookup will find the TYPE_DECL for the implicit "S::S"
12084 typedef. Adjust for that here. */
12085 if (DECL_SELF_REFERENCE_P (decl
))
12086 decl
= TYPE_NAME (TREE_TYPE (decl
));
12088 type
= TREE_TYPE (decl
);
12090 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12091 is false for this case as well. */
12092 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12094 error ("using template type parameter %qT after %qs",
12095 type
, tag_name (tag_code
));
12096 return error_mark_node
;
12098 /* Accept template template parameters. */
12099 else if (allow_template_p
12100 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12101 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12105 If the identifier resolves to a typedef-name or the
12106 simple-template-id resolves to an alias template
12107 specialization, the elaborated-type-specifier is ill-formed.
12109 In other words, the only legitimate declaration to use in the
12110 elaborated type specifier is the implicit typedef created when
12111 the type is declared. */
12112 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12113 && !DECL_SELF_REFERENCE_P (decl
)
12114 && tag_code
!= typename_type
)
12116 if (alias_template_specialization_p (type
))
12117 error ("using alias template specialization %qT after %qs",
12118 type
, tag_name (tag_code
));
12120 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12121 inform (DECL_SOURCE_LOCATION (decl
),
12122 "%qD has a previous declaration here", decl
);
12123 return error_mark_node
;
12125 else if (TREE_CODE (type
) != RECORD_TYPE
12126 && TREE_CODE (type
) != UNION_TYPE
12127 && tag_code
!= enum_type
12128 && tag_code
!= typename_type
)
12130 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12131 inform (input_location
, "%q+T has a previous declaration here", type
);
12132 return error_mark_node
;
12134 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12135 && tag_code
== enum_type
)
12137 error ("%qT referred to as enum", type
);
12138 inform (input_location
, "%q+T has a previous declaration here", type
);
12139 return error_mark_node
;
12141 else if (!allow_template_p
12142 && TREE_CODE (type
) == RECORD_TYPE
12143 && CLASSTYPE_IS_TEMPLATE (type
))
12145 /* If a class template appears as elaborated type specifier
12146 without a template header such as:
12148 template <class T> class C {};
12149 void f(class C); // No template header here
12151 then the required template argument is missing. */
12152 error ("template argument required for %<%s %T%>",
12153 tag_name (tag_code
),
12154 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12155 return error_mark_node
;
12161 /* Lookup NAME in elaborate type specifier in scope according to
12162 SCOPE and issue diagnostics if necessary.
12163 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12164 found, and ERROR_MARK_NODE for type error. */
12167 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12168 tag_scope scope
, bool template_header_p
)
12172 if (scope
== ts_global
)
12174 /* First try ordinary name lookup, ignoring hidden class name
12175 injected via friend declaration. */
12176 decl
= lookup_name_prefer_type (name
, 2);
12177 /* If that fails, the name will be placed in the smallest
12178 non-class, non-function-prototype scope according to 3.3.1/5.
12179 We may already have a hidden name declared as friend in this
12180 scope. So lookup again but not ignoring hidden names.
12181 If we find one, that name will be made visible rather than
12182 creating a new tag. */
12184 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12187 decl
= lookup_type_scope (name
, scope
);
12190 && (DECL_CLASS_TEMPLATE_P (decl
)
12191 /* If scope is ts_current we're defining a class, so ignore a
12192 template template parameter. */
12193 || (scope
!= ts_current
12194 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12195 decl
= DECL_TEMPLATE_RESULT (decl
);
12197 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12199 /* Look for invalid nested type:
12203 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12205 error ("%qD has the same name as the class in which it is "
12208 return error_mark_node
;
12211 /* Two cases we need to consider when deciding if a class
12212 template is allowed as an elaborated type specifier:
12213 1. It is a self reference to its own class.
12214 2. It comes with a template header.
12218 template <class T> class C {
12219 class C *c1; // DECL_SELF_REFERENCE_P is true
12222 template <class U> class C; // template_header_p is true
12223 template <class T> class C<T>::D {
12224 class C *c2; // DECL_SELF_REFERENCE_P is true
12227 t
= check_elaborated_type_specifier (tag_code
,
12230 | DECL_SELF_REFERENCE_P (decl
));
12233 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12235 error ("reference to %qD is ambiguous", name
);
12236 print_candidates (decl
);
12237 return error_mark_node
;
12243 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12244 Define the tag as a forward-reference if it is not defined.
12246 If a declaration is given, process it here, and report an error if
12247 multiple declarations are not identical.
12249 SCOPE is TS_CURRENT when this is also a definition. Only look in
12250 the current frame for the name (since C++ allows new names in any
12251 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12252 declaration. Only look beginning from the current scope outward up
12253 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12255 TEMPLATE_HEADER_P is true when this declaration is preceded by
12256 a set of template parameters. */
12259 xref_tag_1 (enum tag_types tag_code
, tree name
,
12260 tag_scope orig_scope
, bool template_header_p
)
12262 enum tree_code code
;
12264 tree context
= NULL_TREE
;
12267 gcc_assert (identifier_p (name
));
12273 code
= RECORD_TYPE
;
12279 code
= ENUMERAL_TYPE
;
12282 gcc_unreachable ();
12285 if (orig_scope
== ts_lambda
)
12286 scope
= ts_current
;
12288 scope
= orig_scope
;
12290 /* In case of anonymous name, xref_tag is only called to
12291 make type node and push name. Name lookup is not required. */
12292 if (ANON_AGGRNAME_P (name
))
12295 t
= lookup_and_check_tag (tag_code
, name
,
12296 scope
, template_header_p
);
12298 if (t
== error_mark_node
)
12299 return error_mark_node
;
12301 if (scope
!= ts_current
&& t
&& current_class_type
12302 && template_class_depth (current_class_type
)
12303 && template_header_p
)
12305 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12308 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12309 definition of this tag. Since, in addition, we are currently
12310 processing a (member) template declaration of a template
12311 class, we must be very careful; consider:
12318 { template <class V>
12319 friend struct S1; };
12321 Here, the S2::S1 declaration should not be confused with the
12322 outer declaration. In particular, the inner version should
12323 have a template parameter of level 2, not level 1. This
12324 would be particularly important if the member declaration
12327 template <class V = U> friend struct S1;
12329 say, when we should tsubst into `U' when instantiating
12330 S2. On the other hand, when presented with:
12340 we must find the inner binding eventually. We
12341 accomplish this by making sure that the new type we
12342 create to represent this declaration has the right
12344 context
= TYPE_CONTEXT (t
);
12350 /* If no such tag is yet defined, create a forward-reference node
12351 and record it as the "definition".
12352 When a real declaration of this type is found,
12353 the forward-reference will be altered into a real type. */
12354 if (code
== ENUMERAL_TYPE
)
12356 error ("use of enum %q#D without previous declaration", name
);
12357 return error_mark_node
;
12361 t
= make_class_type (code
);
12362 TYPE_CONTEXT (t
) = context
;
12363 if (orig_scope
== ts_lambda
)
12364 /* Remember that we're declaring a lambda to avoid bogus errors
12365 in push_template_decl. */
12366 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12367 t
= pushtag (name
, t
, scope
);
12372 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12374 if (!redeclare_class_template (t
, current_template_parms
))
12375 return error_mark_node
;
12377 else if (!processing_template_decl
12378 && CLASS_TYPE_P (t
)
12379 && CLASSTYPE_IS_TEMPLATE (t
))
12381 error ("redeclaration of %qT as a non-template", t
);
12382 error ("previous declaration %q+D", t
);
12383 return error_mark_node
;
12386 /* Make injected friend class visible. */
12387 if (scope
!= ts_within_enclosing_non_class
12388 && hidden_name_p (TYPE_NAME (t
)))
12390 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12391 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12393 if (TYPE_TEMPLATE_INFO (t
))
12395 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12396 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12404 /* Wrapper for xref_tag_1. */
12407 xref_tag (enum tag_types tag_code
, tree name
,
12408 tag_scope scope
, bool template_header_p
)
12412 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12413 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12414 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12420 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12422 enum tag_types tag_kind
;
12424 if (TREE_CODE (old
) == RECORD_TYPE
)
12425 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12427 tag_kind
= union_type
;
12429 if (id
== NULL_TREE
)
12430 id
= TYPE_IDENTIFIER (old
);
12432 return xref_tag (tag_kind
, id
, scope
, false);
12435 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12436 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12437 access_* node, and the TREE_VALUE is the type of the base-class.
12438 Non-NULL TREE_TYPE indicates virtual inheritance.
12440 Returns true if the binfo hierarchy was successfully created,
12441 false if an error was detected. */
12444 xref_basetypes (tree ref
, tree base_list
)
12447 tree binfo
, base_binfo
;
12448 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12449 unsigned max_bases
= 0; /* Maximum direct bases. */
12451 tree default_access
;
12452 tree igo_prev
; /* Track Inheritance Graph Order. */
12454 if (ref
== error_mark_node
)
12457 /* The base of a derived class is private by default, all others are
12459 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12460 && CLASSTYPE_DECLARED_CLASS (ref
)
12461 ? access_private_node
: access_public_node
);
12463 /* First, make sure that any templates in base-classes are
12464 instantiated. This ensures that if we call ourselves recursively
12465 we do not get confused about which classes are marked and which
12467 basep
= &base_list
;
12470 tree basetype
= TREE_VALUE (*basep
);
12472 /* The dependent_type_p call below should really be dependent_scope_p
12473 so that we give a hard error about using an incomplete type as a
12474 base, but we allow it with a pedwarn for backward
12476 if (processing_template_decl
12477 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12478 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12479 if (!dependent_type_p (basetype
)
12480 && !complete_type_or_else (basetype
, NULL
))
12481 /* An incomplete type. Remove it from the list. */
12482 *basep
= TREE_CHAIN (*basep
);
12486 if (TREE_TYPE (*basep
))
12488 if (CLASS_TYPE_P (basetype
))
12489 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12490 basep
= &TREE_CHAIN (*basep
);
12494 TYPE_MARKED_P (ref
) = 1;
12496 /* The binfo slot should be empty, unless this is an (ill-formed)
12498 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12500 error ("redefinition of %q#T", ref
);
12504 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12506 binfo
= make_tree_binfo (max_bases
);
12508 TYPE_BINFO (ref
) = binfo
;
12509 BINFO_OFFSET (binfo
) = size_zero_node
;
12510 BINFO_TYPE (binfo
) = ref
;
12512 /* Apply base-class info set up to the variants of this type. */
12513 fixup_type_variants (ref
);
12517 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12518 /* An aggregate cannot have baseclasses. */
12519 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12521 if (TREE_CODE (ref
) == UNION_TYPE
)
12523 error ("derived union %qT invalid", ref
);
12530 if (TYPE_FOR_JAVA (ref
))
12532 error ("Java class %qT cannot have multiple bases", ref
);
12539 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12541 if (TYPE_FOR_JAVA (ref
))
12543 error ("Java class %qT cannot have virtual bases", ref
);
12548 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12550 tree access
= TREE_PURPOSE (base_list
);
12551 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12552 tree basetype
= TREE_VALUE (base_list
);
12554 if (access
== access_default_node
)
12555 access
= default_access
;
12557 if (PACK_EXPANSION_P (basetype
))
12558 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12559 if (TREE_CODE (basetype
) == TYPE_DECL
)
12560 basetype
= TREE_TYPE (basetype
);
12561 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12563 error ("base type %qT fails to be a struct or class type",
12568 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12569 TYPE_FOR_JAVA (ref
) = 1;
12571 base_binfo
= NULL_TREE
;
12572 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12574 base_binfo
= TYPE_BINFO (basetype
);
12575 /* The original basetype could have been a typedef'd type. */
12576 basetype
= BINFO_TYPE (base_binfo
);
12578 /* Inherit flags from the base. */
12579 TYPE_HAS_NEW_OPERATOR (ref
)
12580 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12581 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12582 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12583 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12584 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12585 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12586 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12587 CLASSTYPE_REPEATED_BASE_P (ref
)
12588 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12591 /* We must do this test after we've seen through a typedef
12593 if (TYPE_MARKED_P (basetype
))
12595 if (basetype
== ref
)
12596 error ("recursive type %qT undefined", basetype
);
12598 error ("duplicate base type %qT invalid", basetype
);
12602 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12603 /* Regenerate the pack expansion for the bases. */
12604 basetype
= make_pack_expansion (basetype
);
12606 TYPE_MARKED_P (basetype
) = 1;
12608 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12609 &igo_prev
, via_virtual
);
12610 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12611 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12613 BINFO_BASE_APPEND (binfo
, base_binfo
);
12614 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12617 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12618 /* If we didn't get max_vbases vbases, we must have shared at
12619 least one of them, and are therefore diamond shaped. */
12620 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12622 /* Unmark all the types. */
12623 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12624 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12625 TYPE_MARKED_P (ref
) = 0;
12627 /* Now see if we have a repeated base type. */
12628 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12630 for (base_binfo
= binfo
; base_binfo
;
12631 base_binfo
= TREE_CHAIN (base_binfo
))
12633 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12635 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12638 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12640 for (base_binfo
= binfo
; base_binfo
;
12641 base_binfo
= TREE_CHAIN (base_binfo
))
12642 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12643 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12652 /* Copies the enum-related properties from type SRC to type DST.
12653 Used with the underlying type of an enum and the enum itself. */
12655 copy_type_enum (tree dst
, tree src
)
12658 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12660 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12661 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12662 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12663 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12664 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12665 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12666 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12667 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12668 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12672 /* Begin compiling the definition of an enumeration type.
12675 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12677 UNDERLYING_TYPE is the type that will be used as the storage for
12678 the enumeration type. This should be NULL_TREE if no storage type
12681 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12683 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12685 Returns the type object, as yet incomplete.
12686 Also records info about it so that build_enumerator
12687 may be used to declare the individual values as they are read. */
12690 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12691 bool scoped_enum_p
, bool *is_new
)
12693 tree prevtype
= NULL_TREE
;
12694 gcc_assert (identifier_p (name
));
12698 /* [C++0x dcl.enum]p5:
12700 If not explicitly specified, the underlying type of a scoped
12701 enumeration type is int. */
12702 if (!underlying_type
&& scoped_enum_p
)
12703 underlying_type
= integer_type_node
;
12705 if (underlying_type
)
12706 underlying_type
= cv_unqualified (underlying_type
);
12708 /* If this is the real definition for a previous forward reference,
12709 fill in the contents in the same object that used to be the
12710 forward reference. */
12712 enumtype
= lookup_and_check_tag (enum_type
, name
,
12713 /*tag_scope=*/ts_current
,
12714 /*template_header_p=*/false);
12716 /* In case of a template_decl, the only check that should be deferred
12717 to instantiation time is the comparison of underlying types. */
12718 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12720 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12722 error_at (input_location
, "scoped/unscoped mismatch "
12723 "in enum %q#T", enumtype
);
12724 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12725 "previous definition here");
12726 enumtype
= error_mark_node
;
12728 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12730 error_at (input_location
, "underlying type mismatch "
12731 "in enum %q#T", enumtype
);
12732 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12733 "previous definition here");
12734 enumtype
= error_mark_node
;
12736 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12737 && !dependent_type_p (underlying_type
)
12738 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12739 && !same_type_p (underlying_type
,
12740 ENUM_UNDERLYING_TYPE (enumtype
)))
12742 error_at (input_location
, "different underlying type "
12743 "in enum %q#T", enumtype
);
12744 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12745 "previous definition here");
12746 underlying_type
= NULL_TREE
;
12750 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12751 || processing_template_decl
)
12753 /* In case of error, make a dummy enum to allow parsing to
12755 if (enumtype
== error_mark_node
)
12757 name
= make_anon_name ();
12758 enumtype
= NULL_TREE
;
12761 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12762 of an opaque enum, or an opaque enum of an already defined
12763 enumeration (C++0x only).
12764 In any other case, it'll be NULL_TREE. */
12770 prevtype
= enumtype
;
12772 /* Do not push the decl more than once, unless we need to
12773 compare underlying types at instantiation time */
12775 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12776 || (underlying_type
12777 && dependent_type_p (underlying_type
))
12778 || (ENUM_UNDERLYING_TYPE (enumtype
)
12779 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12781 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12782 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12785 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12788 if (enumtype
== error_mark_node
)
12789 return error_mark_node
;
12791 /* The enum is considered opaque until the opening '{' of the
12792 enumerator list. */
12793 SET_OPAQUE_ENUM_P (enumtype
, true);
12794 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12797 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12799 if (underlying_type
)
12801 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12803 copy_type_enum (enumtype
, underlying_type
);
12804 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12806 else if (dependent_type_p (underlying_type
))
12807 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12809 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12810 underlying_type
, enumtype
);
12813 /* If into a template class, the returned enum is always the first
12814 declaration (opaque or not) seen. This way all the references to
12815 this type will be to the same declaration. The following ones are used
12816 only to check for definition errors. */
12817 if (prevtype
&& processing_template_decl
)
12823 /* After processing and defining all the values of an enumeration type,
12824 install their decls in the enumeration type.
12825 ENUMTYPE is the type object. */
12828 finish_enum_value_list (tree enumtype
)
12831 tree underlying_type
;
12834 tree minnode
, maxnode
;
12837 bool fixed_underlying_type_p
12838 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12840 /* We built up the VALUES in reverse order. */
12841 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12843 /* For an enum defined in a template, just set the type of the values;
12844 all further processing is postponed until the template is
12845 instantiated. We need to set the type so that tsubst of a CONST_DECL
12847 if (processing_template_decl
)
12849 for (values
= TYPE_VALUES (enumtype
);
12851 values
= TREE_CHAIN (values
))
12852 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12856 /* Determine the minimum and maximum values of the enumerators. */
12857 if (TYPE_VALUES (enumtype
))
12859 minnode
= maxnode
= NULL_TREE
;
12861 for (values
= TYPE_VALUES (enumtype
);
12863 values
= TREE_CHAIN (values
))
12865 decl
= TREE_VALUE (values
);
12867 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12868 each enumerator has the type of its enumeration. Prior to the
12869 closing brace, the type of each enumerator is the type of its
12870 initializing value. */
12871 TREE_TYPE (decl
) = enumtype
;
12873 /* Update the minimum and maximum values, if appropriate. */
12874 value
= DECL_INITIAL (decl
);
12875 if (value
== error_mark_node
)
12876 value
= integer_zero_node
;
12877 /* Figure out what the minimum and maximum values of the
12878 enumerators are. */
12880 minnode
= maxnode
= value
;
12881 else if (tree_int_cst_lt (maxnode
, value
))
12883 else if (tree_int_cst_lt (value
, minnode
))
12890 If the enumerator-list is empty, the underlying type is as if
12891 the enumeration had a single enumerator with value 0. */
12892 minnode
= maxnode
= integer_zero_node
;
12894 if (!fixed_underlying_type_p
)
12896 /* Compute the number of bits require to represent all values of the
12897 enumeration. We must do this before the type of MINNODE and
12898 MAXNODE are transformed, since tree_int_cst_min_precision relies
12899 on the TREE_TYPE of the value it is passed. */
12900 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12901 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12902 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12903 int precision
= MAX (lowprec
, highprec
);
12905 bool use_short_enum
;
12907 /* Determine the underlying type of the enumeration.
12911 The underlying type of an enumeration is an integral type that
12912 can represent all the enumerator values defined in the
12913 enumeration. It is implementation-defined which integral type is
12914 used as the underlying type for an enumeration except that the
12915 underlying type shall not be larger than int unless the value of
12916 an enumerator cannot fit in an int or unsigned int.
12918 We use "int" or an "unsigned int" as the underlying type, even if
12919 a smaller integral type would work, unless the user has
12920 explicitly requested that we use the smallest possible type. The
12921 user can request that for all enumerations with a command line
12922 flag, or for just one enumeration with an attribute. */
12924 use_short_enum
= flag_short_enums
12925 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12927 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12931 underlying_type
= integer_types
[itk
];
12932 if (underlying_type
!= NULL_TREE
12933 && TYPE_PRECISION (underlying_type
) >= precision
12934 && TYPE_SIGN (underlying_type
) == sgn
)
12937 if (itk
== itk_none
)
12941 IF no integral type can represent all the enumerator values, the
12942 enumeration is ill-formed. */
12943 error ("no integral type can represent all of the enumerator values "
12944 "for %qT", enumtype
);
12945 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12946 underlying_type
= integer_types
[itk_unsigned_long_long
];
12951 The value of sizeof() applied to an enumeration type, an object
12952 of an enumeration type, or an enumerator, is the value of sizeof()
12953 applied to the underlying type. */
12954 copy_type_enum (enumtype
, underlying_type
);
12956 /* Compute the minimum and maximum values for the type.
12960 For an enumeration where emin is the smallest enumerator and emax
12961 is the largest, the values of the enumeration are the values of the
12962 underlying type in the range bmin to bmax, where bmin and bmax are,
12963 respectively, the smallest and largest values of the smallest bit-
12964 field that can store emin and emax. */
12966 /* The middle-end currently assumes that types with TYPE_PRECISION
12967 narrower than their underlying type are suitably zero or sign
12968 extended to fill their mode. Similarly, it assumes that the front
12969 end assures that a value of a particular type must be within
12970 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12972 We used to set these fields based on bmin and bmax, but that led
12973 to invalid assumptions like optimizing away bounds checking. So
12974 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12975 TYPE_MAX_VALUE to the values for the mode above and only restrict
12976 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12977 ENUM_UNDERLYING_TYPE (enumtype
)
12978 = build_distinct_type_copy (underlying_type
);
12979 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12980 set_min_and_max_values_for_integral_type
12981 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12983 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12984 if (flag_strict_enums
)
12985 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12988 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12990 /* Convert each of the enumerators to the type of the underlying
12991 type of the enumeration. */
12992 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12994 location_t saved_location
;
12996 decl
= TREE_VALUE (values
);
12997 saved_location
= input_location
;
12998 input_location
= DECL_SOURCE_LOCATION (decl
);
12999 if (fixed_underlying_type_p
)
13000 /* If the enumeration type has a fixed underlying type, we
13001 already checked all of the enumerator values. */
13002 value
= DECL_INITIAL (decl
);
13004 value
= perform_implicit_conversion (underlying_type
,
13005 DECL_INITIAL (decl
),
13006 tf_warning_or_error
);
13007 input_location
= saved_location
;
13009 /* Do not clobber shared ints. */
13010 value
= copy_node (value
);
13012 TREE_TYPE (value
) = enumtype
;
13013 DECL_INITIAL (decl
) = value
;
13016 /* Fix up all variant types of this enum type. */
13017 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13018 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13020 if (at_class_scope_p ()
13021 && COMPLETE_TYPE_P (current_class_type
)
13022 && UNSCOPED_ENUM_P (enumtype
))
13023 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13024 current_class_type
);
13026 /* Finish debugging output for this type. */
13027 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13030 /* Finishes the enum type. This is called only the first time an
13031 enumeration is seen, be it opaque or odinary.
13032 ENUMTYPE is the type object. */
13035 finish_enum (tree enumtype
)
13037 if (processing_template_decl
)
13039 if (at_function_scope_p ())
13040 add_stmt (build_min (TAG_DEFN
, enumtype
));
13044 /* If this is a forward declaration, there should not be any variants,
13045 though we can get a variant in the middle of an enum-specifier with
13046 wacky code like 'enum E { e = sizeof(const E*) };' */
13047 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13048 && (TYPE_VALUES (enumtype
)
13049 || !TYPE_NEXT_VARIANT (enumtype
)));
13052 /* Build and install a CONST_DECL for an enumeration constant of the
13053 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13054 LOC is the location of NAME.
13055 Assignment of sequential values by default is handled here. */
13058 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
13064 /* scalar_constant_value will pull out this expression, so make sure
13065 it's folded as appropriate. */
13066 if (processing_template_decl
)
13067 value
= fold_non_dependent_expr (value
);
13069 /* If the VALUE was erroneous, pretend it wasn't there; that will
13070 result in the enum being assigned the next value in sequence. */
13071 if (value
== error_mark_node
)
13074 /* Remove no-op casts from the value. */
13076 STRIP_TYPE_NOPS (value
);
13078 if (! processing_template_decl
)
13080 /* Validate and default VALUE. */
13081 if (value
!= NULL_TREE
)
13083 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13085 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13090 else if (! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13091 value
= perform_implicit_conversion_flags
13092 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13093 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13095 if (value
== error_mark_node
)
13098 if (value
!= NULL_TREE
)
13100 value
= cxx_constant_value (value
);
13102 if (TREE_CODE (value
) != INTEGER_CST
13103 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13105 error ("enumerator value for %qD is not an integer constant",
13112 /* Default based on previous value. */
13113 if (value
== NULL_TREE
)
13115 if (TYPE_VALUES (enumtype
))
13120 /* C++03 7.2/4: If no initializer is specified for the first
13121 enumerator, the type is an unspecified integral
13122 type. Otherwise the type is the same as the type of the
13123 initializing value of the preceding enumerator unless the
13124 incremented value is not representable in that type, in
13125 which case the type is an unspecified integral type
13126 sufficient to contain the incremented value. */
13127 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13128 if (error_operand_p (prev_value
))
13129 value
= error_mark_node
;
13132 tree type
= TREE_TYPE (prev_value
);
13133 signop sgn
= TYPE_SIGN (type
);
13134 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13138 bool pos
= !wi::neg_p (wi
, sgn
);
13139 if (!wi::fits_to_tree_p (wi
, type
))
13142 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13144 type
= integer_types
[itk
];
13145 if (type
!= NULL_TREE
13146 && (pos
|| !TYPE_UNSIGNED (type
))
13147 && wi::fits_to_tree_p (wi
, type
))
13150 if (type
&& cxx_dialect
< cxx11
13151 && itk
> itk_unsigned_long
)
13152 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13153 incremented enumerator value is too large for %<unsigned long%>" : "\
13154 incremented enumerator value is too large for %<long%>");
13156 if (type
== NULL_TREE
)
13159 value
= wide_int_to_tree (type
, wi
);
13164 error ("overflow in enumeration values at %qD", name
);
13165 value
= error_mark_node
;
13170 value
= integer_zero_node
;
13173 /* Remove no-op casts from the value. */
13174 STRIP_TYPE_NOPS (value
);
13176 /* If the underlying type of the enum is fixed, check whether
13177 the enumerator values fits in the underlying type. If it
13178 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13179 if (ENUM_UNDERLYING_TYPE (enumtype
)
13181 && TREE_CODE (value
) == INTEGER_CST
)
13183 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13184 error ("enumerator value %E is outside the range of underlying "
13185 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13187 /* Convert the value to the appropriate type. */
13188 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13192 /* C++ associates enums with global, function, or class declarations. */
13193 context
= current_scope ();
13195 /* Build the actual enumeration constant. Note that the enumeration
13196 constants have the underlying type of the enum (if it is fixed)
13197 or the type of their initializer (if the underlying type of the
13198 enum is not fixed):
13202 If the underlying type is fixed, the type of each enumerator
13203 prior to the closing brace is the underlying type; if the
13204 initializing value of an enumerator cannot be represented by
13205 the underlying type, the program is ill-formed. If the
13206 underlying type is not fixed, the type of each enumerator is
13207 the type of its initializing value.
13209 If the underlying type is not fixed, it will be computed by
13210 finish_enum and we will reset the type of this enumerator. Of
13211 course, if we're processing a template, there may be no value. */
13212 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13214 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13216 DECL_CONTEXT (decl
) = enumtype
;
13217 TREE_CONSTANT (decl
) = 1;
13218 TREE_READONLY (decl
) = 1;
13219 DECL_INITIAL (decl
) = value
;
13221 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13222 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13223 on the TYPE_FIELDS list for `S'. (That's so that you can say
13224 things like `S::i' later.) */
13225 finish_member_declaration (decl
);
13229 /* Add this enumeration constant to the list for this type. */
13230 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13233 /* Look for an enumerator with the given NAME within the enumeration
13234 type ENUMTYPE. This routine is used primarily for qualified name
13235 lookup into an enumerator in C++0x, e.g.,
13237 enum class Color { Red, Green, Blue };
13239 Color color = Color::Red;
13241 Returns the value corresponding to the enumerator, or
13242 NULL_TREE if no such enumerator was found. */
13244 lookup_enumerator (tree enumtype
, tree name
)
13247 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13249 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13250 return e
? TREE_VALUE (e
) : NULL_TREE
;
13254 /* We're defining DECL. Make sure that its type is OK. */
13257 check_function_type (tree decl
, tree current_function_parms
)
13259 tree fntype
= TREE_TYPE (decl
);
13260 tree return_type
= complete_type (TREE_TYPE (fntype
));
13262 /* In a function definition, arg types must be complete. */
13263 require_complete_types_for_parms (current_function_parms
);
13265 if (dependent_type_p (return_type
)
13266 || type_uses_auto (return_type
))
13268 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13269 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13271 tree args
= TYPE_ARG_TYPES (fntype
);
13273 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13274 error ("return type %q#T is incomplete", return_type
);
13276 error ("return type has Java class type %q#T", return_type
);
13278 /* Make it return void instead. */
13279 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13280 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13282 TREE_CHAIN (args
));
13284 fntype
= build_function_type (void_type_node
, args
);
13286 = build_exception_variant (fntype
,
13287 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13288 fntype
= (cp_build_type_attribute_variant
13289 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13290 TREE_TYPE (decl
) = fntype
;
13293 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13296 /* Create the FUNCTION_DECL for a function definition.
13297 DECLSPECS and DECLARATOR are the parts of the declaration;
13298 they describe the function's name and the type it returns,
13299 but twisted together in a fashion that parallels the syntax of C.
13301 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13302 DECLARATOR is really the DECL for the function we are about to
13303 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13304 indicating that the function is an inline defined in-class.
13306 This function creates a binding context for the function body
13307 as well as setting up the FUNCTION_DECL in current_function_decl.
13309 For C++, we must first check whether that datum makes any sense.
13310 For example, "class A local_a(1,2);" means that variable local_a
13311 is an aggregate of type A, which should have a constructor
13312 applied to it with the argument list [1, 2].
13314 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13315 or may be a BLOCK if the function has been defined previously
13316 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13317 error_mark_node if the function has never been defined, or
13318 a BLOCK if the function has been defined somewhere. */
13321 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13323 tree ctype
= NULL_TREE
;
13326 int doing_friend
= 0;
13327 cp_binding_level
*bl
;
13328 tree current_function_parms
;
13329 struct c_fileinfo
*finfo
13330 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13331 bool honor_interface
;
13333 /* Sanity check. */
13334 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13335 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13337 fntype
= TREE_TYPE (decl1
);
13338 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13339 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13341 /* ISO C++ 11.4/5. A friend function defined in a class is in
13342 the (lexical) scope of the class in which it is defined. */
13343 if (!ctype
&& DECL_FRIEND_P (decl1
))
13345 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13347 /* CTYPE could be null here if we're dealing with a template;
13348 for example, `inline friend float foo()' inside a template
13349 will have no CTYPE set. */
13350 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13356 if (DECL_DECLARED_INLINE_P (decl1
)
13357 && lookup_attribute ("noinline", attrs
))
13358 warning (0, "inline function %q+D given attribute noinline", decl1
);
13360 /* Handle gnu_inline attribute. */
13361 if (GNU_INLINE_P (decl1
))
13363 DECL_EXTERNAL (decl1
) = 1;
13364 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13365 DECL_INTERFACE_KNOWN (decl1
) = 1;
13366 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13369 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13370 /* This is a constructor, we must ensure that any default args
13371 introduced by this definition are propagated to the clones
13372 now. The clones are used directly in overload resolution. */
13373 adjust_clone_args (decl1
);
13375 /* Sometimes we don't notice that a function is a static member, and
13376 build a METHOD_TYPE for it. Fix that up now. */
13377 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13378 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13380 /* Set up current_class_type, and enter the scope of the class, if
13383 push_nested_class (ctype
);
13384 else if (DECL_STATIC_FUNCTION_P (decl1
))
13385 push_nested_class (DECL_CONTEXT (decl1
));
13387 /* Now that we have entered the scope of the class, we must restore
13388 the bindings for any template parameters surrounding DECL1, if it
13389 is an inline member template. (Order is important; consider the
13390 case where a template parameter has the same name as a field of
13391 the class.) It is not until after this point that
13392 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13393 if (flags
& SF_INCLASS_INLINE
)
13394 maybe_begin_member_template_processing (decl1
);
13396 /* Effective C++ rule 15. */
13398 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13399 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13400 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13402 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13403 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13404 if (!DECL_INITIAL (decl1
))
13405 DECL_INITIAL (decl1
) = error_mark_node
;
13407 /* This function exists in static storage.
13408 (This does not mean `static' in the C sense!) */
13409 TREE_STATIC (decl1
) = 1;
13411 /* We must call push_template_decl after current_class_type is set
13412 up. (If we are processing inline definitions after exiting a
13413 class scope, current_class_type will be NULL_TREE until set above
13414 by push_nested_class.) */
13415 if (processing_template_decl
)
13417 tree newdecl1
= push_template_decl (decl1
);
13418 if (newdecl1
== error_mark_node
)
13420 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13421 pop_nested_class ();
13427 /* We are now in the scope of the function being defined. */
13428 current_function_decl
= decl1
;
13430 /* Save the parm names or decls from this function's declarator
13431 where store_parm_decls will find them. */
13432 current_function_parms
= DECL_ARGUMENTS (decl1
);
13434 /* Make sure the parameter and return types are reasonable. When
13435 you declare a function, these types can be incomplete, but they
13436 must be complete when you define the function. */
13437 check_function_type (decl1
, current_function_parms
);
13439 /* Build the return declaration for the function. */
13440 restype
= TREE_TYPE (fntype
);
13442 if (DECL_RESULT (decl1
) == NULL_TREE
)
13446 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13447 DECL_ARTIFICIAL (resdecl
) = 1;
13448 DECL_IGNORED_P (resdecl
) = 1;
13449 DECL_RESULT (decl1
) = resdecl
;
13451 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13454 /* Let the user know we're compiling this function. */
13455 announce_function (decl1
);
13457 /* Record the decl so that the function name is defined.
13458 If we already have a decl for this name, and it is a FUNCTION_DECL,
13459 use the old decl. */
13460 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13462 /* A specialization is not used to guide overload resolution. */
13463 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13464 && !(DECL_USE_TEMPLATE (decl1
) &&
13465 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13467 tree olddecl
= pushdecl (decl1
);
13469 if (olddecl
== error_mark_node
)
13470 /* If something went wrong when registering the declaration,
13471 use DECL1; we have to have a FUNCTION_DECL to use when
13472 parsing the body of the function. */
13476 /* Otherwise, OLDDECL is either a previous declaration
13477 of the same function or DECL1 itself. */
13479 if (warn_missing_declarations
13480 && olddecl
== decl1
13481 && !DECL_MAIN_P (decl1
)
13482 && TREE_PUBLIC (decl1
)
13483 && !DECL_DECLARED_INLINE_P (decl1
))
13487 /* Check whether DECL1 is in an anonymous
13489 for (context
= DECL_CONTEXT (decl1
);
13491 context
= DECL_CONTEXT (context
))
13493 if (TREE_CODE (context
) == NAMESPACE_DECL
13494 && DECL_NAME (context
) == NULL_TREE
)
13498 if (context
== NULL
)
13499 warning (OPT_Wmissing_declarations
,
13500 "no previous declaration for %q+D", decl1
);
13508 /* We need to set the DECL_CONTEXT. */
13509 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13510 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13512 fntype
= TREE_TYPE (decl1
);
13513 restype
= TREE_TYPE (fntype
);
13515 /* If #pragma weak applies, mark the decl appropriately now.
13516 The pragma only applies to global functions. Because
13517 determining whether or not the #pragma applies involves
13518 computing the mangled name for the declaration, we cannot
13519 apply the pragma until after we have merged this declaration
13520 with any previous declarations; if the original declaration
13521 has a linkage specification, that specification applies to
13522 the definition as well, and may affect the mangled name. */
13523 if (DECL_FILE_SCOPE_P (decl1
))
13524 maybe_apply_pragma_weak (decl1
);
13527 /* Reset this in case the call to pushdecl changed it. */
13528 current_function_decl
= decl1
;
13530 gcc_assert (DECL_INITIAL (decl1
));
13532 /* This function may already have been parsed, in which case just
13533 return; our caller will skip over the body without parsing. */
13534 if (DECL_INITIAL (decl1
) != error_mark_node
)
13537 /* Initialize RTL machinery. We cannot do this until
13538 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13539 even when processing a template; this is how we get
13540 CFUN set up, and our per-function variables initialized.
13541 FIXME factor out the non-RTL stuff. */
13542 bl
= current_binding_level
;
13543 allocate_struct_function (decl1
, processing_template_decl
);
13545 /* Initialize the language data structures. Whenever we start
13546 a new function, we destroy temporaries in the usual way. */
13547 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13548 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13549 current_binding_level
= bl
;
13551 if (!processing_template_decl
&& type_uses_auto (restype
))
13553 FNDECL_USED_AUTO (decl1
) = true;
13554 current_function_auto_return_pattern
= restype
;
13557 /* Start the statement-tree, start the tree now. */
13558 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13560 /* If we are (erroneously) defining a function that we have already
13561 defined before, wipe out what we knew before. */
13562 if (!DECL_PENDING_INLINE_P (decl1
))
13563 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13565 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13567 /* We know that this was set up by `grokclassfn'. We do not
13568 wait until `store_parm_decls', since evil parse errors may
13569 never get us to that point. Here we keep the consistency
13570 between `current_class_type' and `current_class_ptr'. */
13571 tree t
= DECL_ARGUMENTS (decl1
);
13573 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13574 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13576 cp_function_chain
->x_current_class_ref
13577 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13578 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13579 cp_function_chain
->x_current_class_ptr
= t
;
13581 /* Constructors and destructors need to know whether they're "in
13582 charge" of initializing virtual base classes. */
13583 t
= DECL_CHAIN (t
);
13584 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13586 current_in_charge_parm
= t
;
13587 t
= DECL_CHAIN (t
);
13589 if (DECL_HAS_VTT_PARM_P (decl1
))
13591 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13592 current_vtt_parm
= t
;
13596 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13597 /* Implicitly-defined methods (like the
13598 destructor for a class in which no destructor
13599 is explicitly declared) must not be defined
13600 until their definition is needed. So, we
13601 ignore interface specifications for
13602 compiler-generated functions. */
13603 && !DECL_ARTIFICIAL (decl1
));
13605 if (processing_template_decl
)
13606 /* Don't mess with interface flags. */;
13607 else if (DECL_INTERFACE_KNOWN (decl1
))
13609 tree ctx
= decl_function_context (decl1
);
13611 if (DECL_NOT_REALLY_EXTERN (decl1
))
13612 DECL_EXTERNAL (decl1
) = 0;
13614 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13615 /* This is a function in a local class in an extern inline
13616 or template function. */
13617 comdat_linkage (decl1
);
13619 /* If this function belongs to an interface, it is public.
13620 If it belongs to someone else's interface, it is also external.
13621 This only affects inlines and template instantiations. */
13622 else if (!finfo
->interface_unknown
&& honor_interface
)
13624 if (DECL_DECLARED_INLINE_P (decl1
)
13625 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13627 DECL_EXTERNAL (decl1
)
13628 = (finfo
->interface_only
13629 || (DECL_DECLARED_INLINE_P (decl1
)
13630 && ! flag_implement_inlines
13631 && !DECL_VINDEX (decl1
)));
13633 /* For WIN32 we also want to put these in linkonce sections. */
13634 maybe_make_one_only (decl1
);
13637 DECL_EXTERNAL (decl1
) = 0;
13638 DECL_INTERFACE_KNOWN (decl1
) = 1;
13639 /* If this function is in an interface implemented in this file,
13640 make sure that the back end knows to emit this function
13642 if (!DECL_EXTERNAL (decl1
))
13643 mark_needed (decl1
);
13645 else if (finfo
->interface_unknown
&& finfo
->interface_only
13646 && honor_interface
)
13648 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13649 interface, we will have both finfo->interface_unknown and
13650 finfo->interface_only set. In that case, we don't want to
13651 use the normal heuristics because someone will supply a
13652 #pragma implementation elsewhere, and deducing it here would
13653 produce a conflict. */
13654 comdat_linkage (decl1
);
13655 DECL_EXTERNAL (decl1
) = 0;
13656 DECL_INTERFACE_KNOWN (decl1
) = 1;
13657 DECL_DEFER_OUTPUT (decl1
) = 1;
13661 /* This is a definition, not a reference.
13662 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13663 if (!GNU_INLINE_P (decl1
))
13664 DECL_EXTERNAL (decl1
) = 0;
13666 if ((DECL_DECLARED_INLINE_P (decl1
)
13667 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13668 && ! DECL_INTERFACE_KNOWN (decl1
))
13669 DECL_DEFER_OUTPUT (decl1
) = 1;
13671 DECL_INTERFACE_KNOWN (decl1
) = 1;
13674 /* Determine the ELF visibility attribute for the function. We must not
13675 do this before calling "pushdecl", as we must allow "duplicate_decls"
13676 to merge any attributes appropriately. We also need to wait until
13678 if (!DECL_CLONED_FUNCTION_P (decl1
))
13679 determine_visibility (decl1
);
13681 if (!processing_template_decl
)
13682 maybe_instantiate_noexcept (decl1
);
13684 begin_scope (sk_function_parms
, decl1
);
13688 if (DECL_DESTRUCTOR_P (decl1
)
13689 || (DECL_CONSTRUCTOR_P (decl1
)
13690 && targetm
.cxx
.cdtor_returns_this ()))
13692 cdtor_label
= build_decl (input_location
,
13693 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13694 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13697 start_fname_decls ();
13699 store_parm_decls (current_function_parms
);
13705 /* Like start_preparsed_function, except that instead of a
13706 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13708 Returns true on success. If the DECLARATOR is not suitable
13709 for a function, we return false, which tells the parser to
13710 skip the entire function. */
13713 start_function (cp_decl_specifier_seq
*declspecs
,
13714 const cp_declarator
*declarator
,
13719 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13720 if (decl1
== error_mark_node
)
13722 /* If the declarator is not suitable for a function definition,
13723 cause a syntax error. */
13724 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13726 error ("invalid function declaration");
13730 if (DECL_MAIN_P (decl1
))
13731 /* main must return int. grokfndecl should have corrected it
13732 (and issued a diagnostic) if the user got it wrong. */
13733 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13734 integer_type_node
));
13736 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13739 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13743 use_eh_spec_block (tree fn
)
13745 return (flag_exceptions
&& flag_enforce_eh_specs
13746 && !processing_template_decl
13747 && !type_throw_all_p (TREE_TYPE (fn
))
13748 /* We insert the EH_SPEC_BLOCK only in the original
13749 function; then, it is copied automatically to the
13751 && !DECL_CLONED_FUNCTION_P (fn
)
13752 /* Implicitly-generated constructors and destructors have
13753 exception specifications. However, those specifications
13754 are the union of the possible exceptions specified by the
13755 constructors/destructors for bases and members, so no
13756 unallowed exception will ever reach this function. By
13757 not creating the EH_SPEC_BLOCK we save a little memory,
13758 and we avoid spurious warnings about unreachable
13760 && !DECL_DEFAULTED_FN (fn
));
13763 /* Store the parameter declarations into the current function declaration.
13764 This is called after parsing the parameter declarations, before
13765 digesting the body of the function.
13767 Also install to binding contour return value identifier, if any. */
13770 store_parm_decls (tree current_function_parms
)
13772 tree fndecl
= current_function_decl
;
13775 /* This is a chain of any other decls that came in among the parm
13776 declarations. If a parm is declared with enum {foo, bar} x;
13777 then CONST_DECLs for foo and bar are put here. */
13778 tree nonparms
= NULL_TREE
;
13780 if (current_function_parms
)
13782 /* This case is when the function was defined with an ANSI prototype.
13783 The parms already have decls, so we need not do anything here
13784 except record them as in effect
13785 and complain if any redundant old-style parm decls were written. */
13787 tree specparms
= current_function_parms
;
13790 /* Must clear this because it might contain TYPE_DECLs declared
13792 current_binding_level
->names
= NULL
;
13794 /* If we're doing semantic analysis, then we'll call pushdecl
13795 for each of these. We must do them in reverse order so that
13796 they end in the correct forward order. */
13797 specparms
= nreverse (specparms
);
13799 for (parm
= specparms
; parm
; parm
= next
)
13801 next
= DECL_CHAIN (parm
);
13802 if (TREE_CODE (parm
) == PARM_DECL
)
13804 if (DECL_NAME (parm
) == NULL_TREE
13805 || !VOID_TYPE_P (parm
))
13808 error ("parameter %qD declared void", parm
);
13812 /* If we find an enum constant or a type tag,
13813 put it aside for the moment. */
13814 TREE_CHAIN (parm
) = NULL_TREE
;
13815 nonparms
= chainon (nonparms
, parm
);
13819 /* Get the decls in their original chain order and record in the
13820 function. This is all and only the PARM_DECLs that were
13821 pushed into scope by the loop above. */
13822 DECL_ARGUMENTS (fndecl
) = getdecls ();
13825 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13827 /* Now store the final chain of decls for the arguments
13828 as the decl-chain of the current lexical scope.
13829 Put the enumerators in as well, at the front so that
13830 DECL_ARGUMENTS is not modified. */
13831 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13833 if (use_eh_spec_block (current_function_decl
))
13834 current_eh_spec_block
= begin_eh_spec_block ();
13838 /* We have finished doing semantic analysis on DECL, but have not yet
13839 generated RTL for its body. Save away our current state, so that
13840 when we want to generate RTL later we know what to do. */
13843 save_function_data (tree decl
)
13845 struct language_function
*f
;
13847 /* Save the language-specific per-function data so that we can
13848 get it back when we really expand this function. */
13849 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13852 f
= ggc_alloc
<language_function
> ();
13853 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13854 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13856 /* Clear out the bits we don't need. */
13857 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13858 f
->bindings
= NULL
;
13859 f
->x_local_names
= NULL
;
13860 f
->base
.local_typedefs
= NULL
;
13864 /* Set the return value of the constructor (if present). */
13867 finish_constructor_body (void)
13872 if (targetm
.cxx
.cdtor_returns_this ()
13873 && (! TYPE_FOR_JAVA (current_class_type
)))
13875 /* Any return from a constructor will end up here. */
13876 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13878 val
= DECL_ARGUMENTS (current_function_decl
);
13879 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13880 DECL_RESULT (current_function_decl
), val
);
13881 /* Return the address of the object. */
13882 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13883 add_stmt (exprstmt
);
13887 /* Do all the processing for the beginning of a destructor; set up the
13888 vtable pointers and cleanups for bases and members. */
13891 begin_destructor_body (void)
13893 tree compound_stmt
;
13895 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13896 issued an error message. We still want to try to process the
13897 body of the function, but initialize_vtbl_ptrs will crash if
13898 TYPE_BINFO is NULL. */
13899 if (COMPLETE_TYPE_P (current_class_type
))
13901 compound_stmt
= begin_compound_stmt (0);
13902 /* Make all virtual function table pointers in non-virtual base
13903 classes point to CURRENT_CLASS_TYPE's virtual function
13905 initialize_vtbl_ptrs (current_class_ptr
);
13906 finish_compound_stmt (compound_stmt
);
13908 /* Insert a cleanup to let the back end know that the object is dead
13909 when we exit the destructor, either normally or via exception. */
13910 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13911 tree clobber
= build_constructor (btype
, NULL
);
13912 TREE_THIS_VOLATILE (clobber
) = true;
13913 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13914 bref
= convert_from_reference (bref
);
13915 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13916 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13918 /* And insert cleanups for our bases and members so that they
13919 will be properly destroyed if we throw. */
13920 push_base_cleanups ();
13924 /* At the end of every destructor we generate code to delete the object if
13925 necessary. Do that now. */
13928 finish_destructor_body (void)
13932 /* Any return from a destructor will end up here; that way all base
13933 and member cleanups will be run when the function returns. */
13934 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13936 /* In a virtual destructor, we must call delete. */
13937 if (DECL_VIRTUAL_P (current_function_decl
))
13940 tree virtual_size
= cxx_sizeof (current_class_type
);
13944 At the point of definition of a virtual destructor (including
13945 an implicit definition), non-placement operator delete shall
13946 be looked up in the scope of the destructor's class and if
13947 found shall be accessible and unambiguous. */
13948 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13950 /*global_p=*/false,
13951 /*placement=*/NULL_TREE
,
13952 /*alloc_fn=*/NULL_TREE
,
13953 tf_warning_or_error
);
13955 if_stmt
= begin_if_stmt ();
13956 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13957 current_in_charge_parm
,
13960 finish_expr_stmt (exprstmt
);
13961 finish_then_clause (if_stmt
);
13962 finish_if_stmt (if_stmt
);
13965 if (targetm
.cxx
.cdtor_returns_this ())
13969 val
= DECL_ARGUMENTS (current_function_decl
);
13970 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13971 DECL_RESULT (current_function_decl
), val
);
13972 /* Return the address of the object. */
13973 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13974 add_stmt (exprstmt
);
13978 /* Do the necessary processing for the beginning of a function body, which
13979 in this case includes member-initializers, but not the catch clauses of
13980 a function-try-block. Currently, this means opening a binding level
13981 for the member-initializers (in a ctor), member cleanups (in a dtor),
13982 and capture proxies (in a lambda operator()). */
13985 begin_function_body (void)
13989 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13992 if (processing_template_decl
)
13993 /* Do nothing now. */;
13995 /* Always keep the BLOCK node associated with the outermost pair of
13996 curly braces of a function. These are needed for correct
13997 operation of dwarfout.c. */
13998 keep_next_level (true);
14000 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14002 if (processing_template_decl
)
14003 /* Do nothing now. */;
14004 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14005 begin_destructor_body ();
14010 /* Do the processing for the end of a function body. Currently, this means
14011 closing out the cleanups for fully-constructed bases and members, and in
14012 the case of the destructor, deleting the object if desired. Again, this
14013 is only meaningful for [cd]tors, since they are the only functions where
14014 there is a significant distinction between the main body and any
14015 function catch clauses. Handling, say, main() return semantics here
14016 would be wrong, as flowing off the end of a function catch clause for
14017 main() would also need to return 0. */
14020 finish_function_body (tree compstmt
)
14022 if (compstmt
== NULL_TREE
)
14025 /* Close the block. */
14026 finish_compound_stmt (compstmt
);
14028 if (processing_template_decl
)
14029 /* Do nothing now. */;
14030 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14031 finish_constructor_body ();
14032 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14033 finish_destructor_body ();
14036 /* Given a function, returns the BLOCK corresponding to the outermost level
14037 of curly braces, skipping the artificial block created for constructor
14041 outer_curly_brace_block (tree fndecl
)
14043 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
14044 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14045 /* Skip the artificial function body block. */
14046 block
= BLOCK_SUBBLOCKS (block
);
14050 /* If FNDECL is a class's key method, add the class to the list of
14051 keyed classes that should be emitted. */
14054 record_key_method_defined (tree fndecl
)
14056 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14057 && DECL_VIRTUAL_P (fndecl
)
14058 && !processing_template_decl
)
14060 tree fnclass
= DECL_CONTEXT (fndecl
);
14061 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14062 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14066 /* Subroutine of finish_function.
14067 Save the body of constexpr functions for possible
14068 future compile time evaluation. */
14071 maybe_save_function_definition (tree fun
)
14073 if (!processing_template_decl
14074 && DECL_DECLARED_CONSTEXPR_P (fun
)
14075 && !cp_function_chain
->invalid_constexpr
14076 && !DECL_CLONED_FUNCTION_P (fun
))
14077 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14080 /* Finish up a function declaration and compile that function
14081 all the way to assembler language output. The free the storage
14082 for the function definition.
14084 FLAGS is a bitwise or of the following values:
14086 We just finished processing the body of an in-class inline
14087 function definition. (This processing will have taken place
14088 after the class definition is complete.) */
14091 finish_function (int flags
)
14093 tree fndecl
= current_function_decl
;
14094 tree fntype
, ctype
= NULL_TREE
;
14095 int inclass_inline
= (flags
& 2) != 0;
14097 /* When we get some parse errors, we can end up without a
14098 current_function_decl, so cope. */
14099 if (fndecl
== NULL_TREE
)
14100 return error_mark_node
;
14102 if (c_dialect_objc ())
14103 objc_finish_function ();
14105 gcc_assert (!defer_mark_used_calls
);
14106 defer_mark_used_calls
= true;
14108 record_key_method_defined (fndecl
);
14110 fntype
= TREE_TYPE (fndecl
);
14112 /* TREE_READONLY (fndecl) = 1;
14113 This caused &foo to be of type ptr-to-const-function
14114 which then got a warning when stored in a ptr-to-function variable. */
14116 gcc_assert (building_stmt_list_p ());
14117 /* The current function is being defined, so its DECL_INITIAL should
14118 be set, and unless there's a multiple definition, it should be
14119 error_mark_node. */
14120 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14122 /* For a cloned function, we've already got all the code we need;
14123 there's no need to add any extra bits. */
14124 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14126 /* Make it so that `main' always returns 0 by default. */
14127 if (DECL_MAIN_P (current_function_decl
))
14128 finish_return_stmt (integer_zero_node
);
14130 if (use_eh_spec_block (current_function_decl
))
14131 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14132 (TREE_TYPE (current_function_decl
)),
14133 current_eh_spec_block
);
14136 /* If we're saving up tree structure, tie off the function now. */
14137 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14139 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14140 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14142 finish_fname_decls ();
14144 /* If this function can't throw any exceptions, remember that. */
14145 if (!processing_template_decl
14146 && !cp_function_chain
->can_throw
14147 && !flag_non_call_exceptions
14148 && !decl_replaceable_p (fndecl
))
14149 TREE_NOTHROW (fndecl
) = 1;
14151 /* This must come after expand_function_end because cleanups might
14152 have declarations (from inline functions) that need to go into
14153 this function's blocks. */
14155 /* If the current binding level isn't the outermost binding level
14156 for this function, either there is a bug, or we have experienced
14157 syntax errors and the statement tree is malformed. */
14158 if (current_binding_level
->kind
!= sk_function_parms
)
14160 /* Make sure we have already experienced errors. */
14161 gcc_assert (errorcount
);
14163 /* Throw away the broken statement tree and extra binding
14165 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14167 while (current_binding_level
->kind
!= sk_function_parms
)
14169 if (current_binding_level
->kind
== sk_class
)
14170 pop_nested_class ();
14172 poplevel (0, 0, 0);
14175 poplevel (1, 0, 1);
14177 /* Statements should always be full-expressions at the outermost set
14178 of curly braces for a function. */
14179 gcc_assert (stmts_are_full_exprs_p ());
14181 /* If there are no return statements in a function with auto return type,
14182 the return type is void. But if the declared type is something like
14183 auto*, this is an error. */
14184 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14185 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14187 if (!is_auto (current_function_auto_return_pattern
)
14188 && !current_function_returns_value
&& !current_function_returns_null
)
14190 error ("no return statements in function returning %qT",
14191 current_function_auto_return_pattern
);
14192 inform (input_location
, "only plain %<auto%> return type can be "
14193 "deduced to %<void%>");
14195 apply_deduced_return_type (fndecl
, void_type_node
);
14196 fntype
= TREE_TYPE (fndecl
);
14199 /* Save constexpr function body before it gets munged by
14200 the NRV transformation. */
14201 maybe_save_function_definition (fndecl
);
14203 /* Set up the named return value optimization, if we can. Candidate
14204 variables are selected in check_return_expr. */
14205 if (current_function_return_value
)
14207 tree r
= current_function_return_value
;
14210 if (r
!= error_mark_node
14211 /* This is only worth doing for fns that return in memory--and
14212 simpler, since we don't have to worry about promoted modes. */
14213 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14214 /* Only allow this for variables declared in the outer scope of
14215 the function so we know that their lifetime always ends with a
14216 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14217 we were to do this optimization in tree-ssa. */
14218 && (outer
= outer_curly_brace_block (fndecl
))
14219 && chain_member (r
, BLOCK_VARS (outer
)))
14220 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14222 current_function_return_value
= NULL_TREE
;
14225 /* Remember that we were in class scope. */
14226 if (current_class_name
)
14227 ctype
= current_class_type
;
14229 /* Must mark the RESULT_DECL as being in this function. */
14230 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14232 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14233 to the FUNCTION_DECL node itself. */
14234 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14236 /* Save away current state, if appropriate. */
14237 if (!processing_template_decl
)
14238 save_function_data (fndecl
);
14240 /* Complain if there's just no return statement. */
14241 if (warn_return_type
14242 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14243 && !dependent_type_p (TREE_TYPE (fntype
))
14244 && !current_function_returns_value
&& !current_function_returns_null
14245 /* Don't complain if we abort or throw. */
14246 && !current_function_returns_abnormally
14247 /* Don't complain if there's an infinite loop. */
14248 && !current_function_infinite_loop
14249 /* Don't complain if we are declared noreturn. */
14250 && !TREE_THIS_VOLATILE (fndecl
)
14251 && !DECL_NAME (DECL_RESULT (fndecl
))
14252 && !TREE_NO_WARNING (fndecl
)
14253 /* Structor return values (if any) are set by the compiler. */
14254 && !DECL_CONSTRUCTOR_P (fndecl
)
14255 && !DECL_DESTRUCTOR_P (fndecl
)
14256 && targetm
.warn_func_return (fndecl
))
14258 warning (OPT_Wreturn_type
,
14259 "no return statement in function returning non-void");
14260 TREE_NO_WARNING (fndecl
) = 1;
14263 /* Store the end of the function, so that we get good line number
14264 info for the epilogue. */
14265 cfun
->function_end_locus
= input_location
;
14267 /* Complain about parameters that are only set, but never otherwise used. */
14268 if (warn_unused_but_set_parameter
14269 && !processing_template_decl
14270 && errorcount
== unused_but_set_errorcount
14271 && !DECL_CLONED_FUNCTION_P (fndecl
))
14275 for (decl
= DECL_ARGUMENTS (fndecl
);
14277 decl
= DECL_CHAIN (decl
))
14278 if (TREE_USED (decl
)
14279 && TREE_CODE (decl
) == PARM_DECL
14280 && !DECL_READ_P (decl
)
14281 && DECL_NAME (decl
)
14282 && !DECL_ARTIFICIAL (decl
)
14283 && !TREE_NO_WARNING (decl
)
14284 && !DECL_IN_SYSTEM_HEADER (decl
)
14285 && TREE_TYPE (decl
) != error_mark_node
14286 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14287 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14288 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14289 warning (OPT_Wunused_but_set_parameter
,
14290 "parameter %q+D set but not used", decl
);
14291 unused_but_set_errorcount
= errorcount
;
14294 /* Complain about locally defined typedefs that are not used in this
14296 maybe_warn_unused_local_typedefs ();
14298 /* Genericize before inlining. */
14299 if (!processing_template_decl
)
14301 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14302 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14303 cp_genericize (fndecl
);
14304 /* Clear out the bits we don't need. */
14305 f
->x_current_class_ptr
= NULL
;
14306 f
->x_current_class_ref
= NULL
;
14307 f
->x_eh_spec_block
= NULL
;
14308 f
->x_in_charge_parm
= NULL
;
14309 f
->x_vtt_parm
= NULL
;
14310 f
->x_return_value
= NULL
;
14311 f
->bindings
= NULL
;
14312 f
->extern_decl_map
= NULL
;
14313 f
->infinite_loops
= NULL
;
14315 /* Clear out the bits we don't need. */
14316 local_names
= NULL
;
14318 /* We're leaving the context of this function, so zap cfun. It's still in
14319 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14321 current_function_decl
= NULL
;
14323 /* If this is an in-class inline definition, we may have to pop the
14324 bindings for the template parameters that we added in
14325 maybe_begin_member_template_processing when start_function was
14327 if (inclass_inline
)
14328 maybe_end_member_template_processing ();
14330 /* Leave the scope of the class. */
14332 pop_nested_class ();
14337 current_function_decl
= NULL_TREE
;
14339 defer_mark_used_calls
= false;
14340 if (deferred_mark_used_calls
)
14345 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14347 vec_free (deferred_mark_used_calls
);
14353 /* Create the FUNCTION_DECL for a function definition.
14354 DECLSPECS and DECLARATOR are the parts of the declaration;
14355 they describe the return type and the name of the function,
14356 but twisted together in a fashion that parallels the syntax of C.
14358 This function creates a binding context for the function body
14359 as well as setting up the FUNCTION_DECL in current_function_decl.
14361 Returns a FUNCTION_DECL on success.
14363 If the DECLARATOR is not suitable for a function (it defines a datum
14364 instead), we return 0, which tells yyparse to report a parse error.
14366 May return void_type_node indicating that this method is actually
14367 a friend. See grokfield for more details.
14369 Came here with a `.pushlevel' .
14371 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14372 CHANGES TO CODE IN `grokfield'. */
14375 grokmethod (cp_decl_specifier_seq
*declspecs
,
14376 const cp_declarator
*declarator
, tree attrlist
)
14378 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14381 if (fndecl
== error_mark_node
)
14382 return error_mark_node
;
14384 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14386 error ("invalid member function declaration");
14387 return error_mark_node
;
14391 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14393 /* Pass friends other than inline friend functions back. */
14394 if (fndecl
== void_type_node
)
14397 if (DECL_IN_AGGR_P (fndecl
))
14399 if (DECL_CLASS_SCOPE_P (fndecl
))
14400 error ("%qD is already defined in class %qT", fndecl
,
14401 DECL_CONTEXT (fndecl
));
14402 return error_mark_node
;
14405 check_template_shadow (fndecl
);
14407 DECL_COMDAT (fndecl
) = 1;
14408 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14409 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14411 /* We process method specializations in finish_struct_1. */
14412 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14414 fndecl
= push_template_decl (fndecl
);
14415 if (fndecl
== error_mark_node
)
14419 if (! DECL_FRIEND_P (fndecl
))
14421 if (DECL_CHAIN (fndecl
))
14423 fndecl
= copy_node (fndecl
);
14424 TREE_CHAIN (fndecl
) = NULL_TREE
;
14428 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14430 DECL_IN_AGGR_P (fndecl
) = 1;
14435 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14436 we can lay it out later, when and if its type becomes complete.
14438 Also handle constexpr variables where the initializer involves
14439 an unlowered PTRMEM_CST because the class isn't complete yet. */
14442 maybe_register_incomplete_var (tree var
)
14444 gcc_assert (VAR_P (var
));
14446 /* Keep track of variables with incomplete types. */
14447 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14448 && DECL_EXTERNAL (var
))
14450 tree inner_type
= TREE_TYPE (var
);
14452 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14453 inner_type
= TREE_TYPE (inner_type
);
14454 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14456 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14457 /* RTTI TD entries are created while defining the type_info. */
14458 || (TYPE_LANG_SPECIFIC (inner_type
)
14459 && TYPE_BEING_DEFINED (inner_type
)))
14461 incomplete_var iv
= {var
, inner_type
};
14462 vec_safe_push (incomplete_vars
, iv
);
14464 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14465 && decl_constant_var_p (var
)
14466 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14468 /* When the outermost open class is complete we can resolve any
14469 pointers-to-members. */
14470 tree context
= outermost_open_class ();
14471 incomplete_var iv
= {var
, context
};
14472 vec_safe_push (incomplete_vars
, iv
);
14477 /* Called when a class type (given by TYPE) is defined. If there are
14478 any existing VAR_DECLs whose type has been completed by this
14479 declaration, update them now. */
14482 complete_vars (tree type
)
14485 incomplete_var
*iv
;
14487 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14489 if (same_type_p (type
, iv
->incomplete_type
))
14491 tree var
= iv
->decl
;
14492 tree type
= TREE_TYPE (var
);
14494 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14495 == iv
->incomplete_type
)
14497 /* Complete the type of the variable. The VAR_DECL itself
14498 will be laid out in expand_expr. */
14499 complete_type (type
);
14500 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14503 if (DECL_INITIAL (var
)
14504 && decl_constant_var_p (var
))
14505 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14507 /* Remove this entry from the list. */
14508 incomplete_vars
->unordered_remove (ix
);
14514 /* Check for pending declarations which may have abstract type. */
14515 complete_type_check_abstract (type
);
14518 /* If DECL is of a type which needs a cleanup, build and return an
14519 expression to perform that cleanup here. Return NULL_TREE if no
14520 cleanup need be done. */
14523 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14529 /* Assume no cleanup is required. */
14530 cleanup
= NULL_TREE
;
14532 if (error_operand_p (decl
))
14535 /* Handle "__attribute__((cleanup))". We run the cleanup function
14536 before the destructor since the destructor is what actually
14537 terminates the lifetime of the object. */
14538 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14545 /* Get the name specified by the user for the cleanup function. */
14546 id
= TREE_VALUE (TREE_VALUE (attr
));
14547 /* Look up the name to find the cleanup function to call. It is
14548 important to use lookup_name here because that is what is
14549 used in c-common.c:handle_cleanup_attribute when performing
14550 initial checks on the attribute. Note that those checks
14551 include ensuring that the function found is not an overloaded
14552 function, or an object with an overloaded call operator,
14553 etc.; we can rely on the fact that the function found is an
14554 ordinary FUNCTION_DECL. */
14555 fn
= lookup_name (id
);
14556 arg
= build_address (decl
);
14558 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14559 if (cleanup
== error_mark_node
)
14560 return error_mark_node
;
14562 /* Handle ordinary C++ destructors. */
14563 type
= TREE_TYPE (decl
);
14564 if (type_build_dtor_call (type
))
14566 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14570 if (TREE_CODE (type
) == ARRAY_TYPE
)
14573 addr
= build_address (decl
);
14575 call
= build_delete (TREE_TYPE (addr
), addr
,
14576 sfk_complete_destructor
, flags
, 0, complain
);
14577 if (call
== error_mark_node
)
14578 cleanup
= error_mark_node
;
14579 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14580 /* Discard the call. */;
14582 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14587 /* build_delete sets the location of the destructor call to the
14588 current location, even though the destructor is going to be
14589 called later, at the end of the current scope. This can lead to
14590 a "jumpy" behaviour for users of debuggers when they step around
14591 the end of the block. So let's unset the location of the
14592 destructor call instead. */
14593 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14594 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14597 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14598 /* Treat objects with destructors as used; the destructor may do
14599 something substantive. */
14606 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14607 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14608 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14611 static_fn_type (tree memfntype
)
14616 if (TYPE_PTRMEMFUNC_P (memfntype
))
14617 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14618 if (POINTER_TYPE_P (memfntype
)
14619 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14620 memfntype
= TREE_TYPE (memfntype
);
14621 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14623 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14624 args
= TYPE_ARG_TYPES (memfntype
);
14625 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14626 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14627 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14628 fntype
= (cp_build_type_attribute_variant
14629 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14630 fntype
= (build_exception_variant
14631 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14632 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14633 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14637 /* DECL was originally constructed as a non-static member function,
14638 but turned out to be static. Update it accordingly. */
14641 revert_static_member_fn (tree decl
)
14643 tree stype
= static_fn_type (decl
);
14644 cp_cv_quals quals
= type_memfn_quals (stype
);
14645 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14647 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14648 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14650 TREE_TYPE (decl
) = stype
;
14652 if (DECL_ARGUMENTS (decl
))
14653 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14654 DECL_STATIC_FUNCTION_P (decl
) = 1;
14657 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14658 one of the language-independent trees. */
14660 enum cp_tree_node_structure_enum
14661 cp_tree_node_structure (union lang_tree_node
* t
)
14663 switch (TREE_CODE (&t
->generic
))
14665 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14666 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14667 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14668 case OVERLOAD
: return TS_CP_OVERLOAD
;
14669 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14670 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14671 case BASELINK
: return TS_CP_BASELINK
;
14672 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14673 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14674 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14675 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14676 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14677 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14678 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14679 default: return TS_CP_GENERIC
;
14683 /* Build the void_list_node (void_type_node having been created). */
14685 build_void_list_node (void)
14687 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14692 cp_missing_noreturn_ok_p (tree decl
)
14694 /* A missing noreturn is ok for the `main' function. */
14695 return DECL_MAIN_P (decl
);
14698 /* Return the decl used to identify the COMDAT group into which DECL should
14702 cxx_comdat_group (tree decl
)
14704 /* Virtual tables, construction virtual tables, and virtual table
14705 tables all go in a single COMDAT group, named after the primary
14707 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14708 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14709 /* For all other DECLs, the COMDAT group is the mangled name of the
14710 declaration itself. */
14713 while (DECL_THUNK_P (decl
))
14715 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14716 into the same section as the target function. In that case
14717 we must return target's name. */
14718 tree target
= THUNK_TARGET (decl
);
14719 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14720 && DECL_SECTION_NAME (target
) != NULL
14721 && DECL_ONE_ONLY (target
))
14731 /* Returns the return type for FN as written by the user, which may include
14732 a placeholder for a deduced return type. */
14735 fndecl_declared_return_type (tree fn
)
14737 fn
= STRIP_TEMPLATE (fn
);
14738 if (FNDECL_USED_AUTO (fn
))
14740 struct language_function
*f
= NULL
;
14741 if (DECL_STRUCT_FUNCTION (fn
))
14742 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14744 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14745 return f
->x_auto_return_pattern
;
14747 return TREE_TYPE (TREE_TYPE (fn
));
14750 /* Returns true iff DECL was declared with an auto return type and it has
14751 not yet been deduced to a real type. */
14754 undeduced_auto_decl (tree decl
)
14756 if (cxx_dialect
< cxx14
)
14758 return type_uses_auto (TREE_TYPE (decl
));
14761 /* Complain if DECL has an undeduced return type. */
14764 require_deduced_type (tree decl
)
14766 if (undeduced_auto_decl (decl
))
14767 error ("use of %qD before deduction of %<auto%>", decl
);
14770 #include "gt-cp-decl.h"