1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2014 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"
34 #include "stringpool.h"
35 #include "stor-layout.h"
41 #include "tree-iterator.h"
42 #include "tree-inline.h"
49 #include "c-family/c-common.h"
50 #include "c-family/c-objc.h"
51 #include "c-family/c-pragma.h"
52 #include "c-family/c-target.h"
53 #include "c-family/c-ubsan.h"
54 #include "diagnostic.h"
58 #include "splay-tree.h"
65 /* Possible cases of bad specifiers type used by bad_specifiers. */
67 BSP_VAR
, /* variable */
68 BSP_PARM
, /* parameter */
73 static tree
grokparms (tree parmlist
, tree
*);
74 static const char *redeclaration_error_message (tree
, tree
);
76 static int decl_jump_unsafe (tree
);
77 static void require_complete_types_for_parms (tree
);
78 static int ambi_op_p (enum tree_code
);
79 static int unary_op_p (enum tree_code
);
80 static void push_local_name (tree
);
81 static tree
grok_reference_init (tree
, tree
, tree
, int);
82 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
84 static int check_static_variable_definition (tree
, tree
);
85 static void record_unknown_type (tree
, const char *);
86 static tree
builtin_function_1 (tree
, tree
, bool);
87 static int member_function_or_else (tree
, tree
, enum overload_flags
);
88 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
90 static void check_for_uninitialized_const_var (tree
);
91 static hashval_t
typename_hash (const void *);
92 static int typename_compare (const void *, const void *);
93 static tree
local_variable_p_walkfn (tree
*, int *, void *);
94 static tree
record_builtin_java_type (const char *, int);
95 static const char *tag_name (enum tag_types
);
96 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
97 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
98 static void maybe_deduce_size_from_array_init (tree
, tree
);
99 static void layout_var_decl (tree
);
100 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
101 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
102 static void save_function_data (tree
);
103 static void copy_type_enum (tree
, tree
);
104 static void check_function_type (tree
, tree
);
105 static void finish_constructor_body (void);
106 static void begin_destructor_body (void);
107 static void finish_destructor_body (void);
108 static void record_key_method_defined (tree
);
109 static tree
create_array_type_for_decl (tree
, tree
, tree
);
110 static tree
get_atexit_node (void);
111 static tree
get_dso_handle_node (void);
112 static tree
start_cleanup_fn (void);
113 static void end_cleanup_fn (void);
114 static tree
cp_make_fname_decl (location_t
, tree
, int);
115 static void initialize_predefined_identifiers (void);
116 static tree check_special_function_return_type
117 (special_function_kind
, tree
, tree
);
118 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
119 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
120 static void store_parm_decls (tree
);
121 static void initialize_local_var (tree
, tree
);
122 static void expand_static_init (tree
, tree
);
124 /* The following symbols are subsumed in the cp_global_trees array, and
125 listed here individually for documentation purposes.
128 tree wchar_decl_node;
130 tree vtable_entry_type;
131 tree delta_type_node;
132 tree __t_desc_type_node;
134 tree class_type_node;
135 tree unknown_type_node;
137 Array type `vtable_entry_type[]'
140 tree vtbl_ptr_type_node;
147 A FUNCTION_DECL which can call `abort'. Not necessarily the
148 one that the user will declare, but sufficient to be called
149 by routines that want to abort the program.
153 The FUNCTION_DECL for the default `::operator delete'.
155 tree global_delete_fndecl;
158 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
159 tree tinfo_var_id; */
161 tree cp_global_trees
[CPTI_MAX
];
163 /* Indicates that there is a type value in some namespace, although
164 that is not necessarily in scope at the moment. */
166 tree global_type_node
;
168 /* The node that holds the "name" of the global scope. */
169 tree global_scope_name
;
171 #define local_names cp_function_chain->x_local_names
173 /* A list of objects which have constructors or destructors
174 which reside in the global scope. The decl is stored in
175 the TREE_VALUE slot and the initializer is stored
176 in the TREE_PURPOSE slot. */
177 tree static_aggregates
;
179 /* Like static_aggregates, but for thread_local variables. */
184 /* A node for the integer constant 2. */
186 tree integer_two_node
;
188 /* Used only for jumps to as-yet undefined labels, since jumps to
189 defined labels can have their validity checked immediately. */
191 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
192 struct named_label_use_entry
*next
;
193 /* The binding level to which this entry is *currently* attached.
194 This is initially the binding level in which the goto appeared,
195 but is modified as scopes are closed. */
196 cp_binding_level
*binding_level
;
197 /* The head of the names list that was current when the goto appeared,
198 or the inner scope popped. These are the decls that will *not* be
199 skipped when jumping to the label. */
201 /* The location of the goto, for error reporting. */
202 location_t o_goto_locus
;
203 /* True if an OpenMP structured block scope has been closed since
204 the goto appeared. This means that the branch from the label will
205 illegally exit an OpenMP scope. */
209 /* A list of all LABEL_DECLs in the function that have names. Here so
210 we can clear out their names' definitions at the end of the
211 function, and so we can check the validity of jumps to these labels. */
213 struct GTY(()) named_label_entry
{
214 /* The decl itself. */
217 /* The binding level to which the label is *currently* attached.
218 This is initially set to the binding level in which the label
219 is defined, but is modified as scopes are closed. */
220 cp_binding_level
*binding_level
;
221 /* The head of the names list that was current when the label was
222 defined, or the inner scope popped. These are the decls that will
223 be skipped when jumping to the label. */
225 /* A vector of all decls from all binding levels that would be
226 crossed by a backward branch to the label. */
227 vec
<tree
, va_gc
> *bad_decls
;
229 /* A list of uses of the label, before the label is defined. */
230 struct named_label_use_entry
*uses
;
232 /* The following bits are set after the label is defined, and are
233 updated as scopes are popped. They indicate that a backward jump
234 to the label will illegally enter a scope of the given flavor. */
240 #define named_labels cp_function_chain->x_named_labels
242 /* The number of function bodies which we are currently processing.
243 (Zero if we are at namespace scope, one inside the body of a
244 function, two inside the body of a function in a local class, etc.) */
247 /* To avoid unwanted recursion, finish_function defers all mark_used calls
248 encountered during its execution until it finishes. */
249 bool defer_mark_used_calls
;
250 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
252 /* States indicating how grokdeclarator() should handle declspecs marked
253 with __attribute__((deprecated)). An object declared as
254 __attribute__((deprecated)) suppresses warnings of uses of other
256 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
259 /* A list of VAR_DECLs whose type was incomplete at the time the
260 variable was declared. */
262 typedef struct GTY(()) incomplete_var_d
{
264 tree incomplete_type
;
268 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
270 /* Returns the kind of template specialization we are currently
271 processing, given that it's declaration contained N_CLASS_SCOPES
272 explicit scope qualifications. */
275 current_tmpl_spec_kind (int n_class_scopes
)
277 int n_template_parm_scopes
= 0;
278 int seen_specialization_p
= 0;
279 int innermost_specialization_p
= 0;
282 /* Scan through the template parameter scopes. */
283 for (b
= current_binding_level
;
284 b
->kind
== sk_template_parms
;
287 /* If we see a specialization scope inside a parameter scope,
288 then something is wrong. That corresponds to a declaration
291 template <class T> template <> ...
293 which is always invalid since [temp.expl.spec] forbids the
294 specialization of a class member template if the enclosing
295 class templates are not explicitly specialized as well. */
296 if (b
->explicit_spec_p
)
298 if (n_template_parm_scopes
== 0)
299 innermost_specialization_p
= 1;
301 seen_specialization_p
= 1;
303 else if (seen_specialization_p
== 1)
304 return tsk_invalid_member_spec
;
306 ++n_template_parm_scopes
;
309 /* Handle explicit instantiations. */
310 if (processing_explicit_instantiation
)
312 if (n_template_parm_scopes
!= 0)
313 /* We've seen a template parameter list during an explicit
314 instantiation. For example:
316 template <class T> template void f(int);
318 This is erroneous. */
319 return tsk_invalid_expl_inst
;
321 return tsk_expl_inst
;
324 if (n_template_parm_scopes
< n_class_scopes
)
325 /* We've not seen enough template headers to match all the
326 specialized classes present. For example:
328 template <class T> void R<T>::S<T>::f(int);
330 This is invalid; there needs to be one set of template
331 parameters for each class. */
332 return tsk_insufficient_parms
;
333 else if (n_template_parm_scopes
== n_class_scopes
)
334 /* We're processing a non-template declaration (even though it may
335 be a member of a template class.) For example:
337 template <class T> void S<T>::f(int);
339 The `class T' matches the `S<T>', leaving no template headers
340 corresponding to the `f'. */
342 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
343 /* We've got too many template headers. For example:
345 template <> template <class T> void f (T);
347 There need to be more enclosing classes. */
348 return tsk_excessive_parms
;
350 /* This must be a template. It's of the form:
352 template <class T> template <class U> void S<T>::f(U);
354 This is a specialization if the innermost level was a
355 specialization; otherwise it's just a definition of the
357 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
360 /* Exit the current scope. */
368 /* When a label goes out of scope, check to see if that label was used
369 in a valid manner, and issue any appropriate warnings or errors. */
372 pop_label (tree label
, tree old_value
)
374 if (!processing_template_decl
)
376 if (DECL_INITIAL (label
) == NULL_TREE
)
380 error ("label %q+D used but not defined", label
);
381 location
= input_location
;
382 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
383 /* Avoid crashing later. */
384 define_label (location
, DECL_NAME (label
));
387 warn_for_unused_label (label
);
390 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
393 /* At the end of a function, all labels declared within the function
394 go out of scope. BLOCK is the top-level block for the
398 pop_labels_1 (void **slot
, void *data
)
400 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
401 tree block
= (tree
) data
;
403 pop_label (ent
->label_decl
, NULL_TREE
);
405 /* Put the labels into the "variables" of the top-level block,
406 so debugger can see them. */
407 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
408 BLOCK_VARS (block
) = ent
->label_decl
;
410 htab_clear_slot (named_labels
, slot
);
416 pop_labels (tree block
)
420 htab_traverse (named_labels
, pop_labels_1
, block
);
425 /* At the end of a block with local labels, restore the outer definition. */
428 pop_local_label (tree label
, tree old_value
)
430 struct named_label_entry dummy
;
433 pop_label (label
, old_value
);
435 dummy
.label_decl
= label
;
436 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
437 htab_clear_slot (named_labels
, slot
);
440 /* The following two routines are used to interface to Objective-C++.
441 The binding level is purposely treated as an opaque type. */
444 objc_get_current_scope (void)
446 return current_binding_level
;
449 /* The following routine is used by the NeXT-style SJLJ exceptions;
450 variables get marked 'volatile' so as to not be clobbered by
451 _setjmp()/_longjmp() calls. All variables in the current scope,
452 as well as parent scopes up to (but not including) ENCLOSING_BLK
453 shall be thusly marked. */
456 objc_mark_locals_volatile (void *enclosing_blk
)
458 cp_binding_level
*scope
;
460 for (scope
= current_binding_level
;
461 scope
&& scope
!= enclosing_blk
;
462 scope
= scope
->level_chain
)
466 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
467 objc_volatilize_decl (decl
);
469 /* Do not climb up past the current function. */
470 if (scope
->kind
== sk_function_parms
)
475 /* Update data for defined and undefined labels when leaving a scope. */
478 poplevel_named_label_1 (void **slot
, void *data
)
480 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
481 cp_binding_level
*bl
= (cp_binding_level
*) data
;
482 cp_binding_level
*obl
= bl
->level_chain
;
484 if (ent
->binding_level
== bl
)
488 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
489 TREE_LISTs representing OVERLOADs, so be careful. */
490 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
492 : TREE_CHAIN (decl
)))
493 if (decl_jump_unsafe (decl
))
494 vec_safe_push (ent
->bad_decls
, decl
);
496 ent
->binding_level
= obl
;
497 ent
->names_in_scope
= obl
->names
;
501 ent
->in_try_scope
= true;
504 ent
->in_catch_scope
= true;
507 ent
->in_omp_scope
= true;
515 struct named_label_use_entry
*use
;
517 for (use
= ent
->uses
; use
; use
= use
->next
)
518 if (use
->binding_level
== bl
)
520 use
->binding_level
= obl
;
521 use
->names_in_scope
= obl
->names
;
522 if (bl
->kind
== sk_omp
)
523 use
->in_omp_scope
= true;
530 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
531 when errors were reported, except for -Werror-unused-but-set-*. */
532 static int unused_but_set_errorcount
;
534 /* Exit a binding level.
535 Pop the level off, and restore the state of the identifier-decl mappings
536 that were in effect when this level was entered.
538 If KEEP == 1, this level had explicit declarations, so
539 and create a "block" (a BLOCK node) for the level
540 to record its declarations and subblocks for symbol table output.
542 If FUNCTIONBODY is nonzero, this level is the body of a function,
543 so create a block as if KEEP were set and also clear out all
546 If REVERSE is nonzero, reverse the order of decls before putting
547 them into the BLOCK. */
550 poplevel (int keep
, int reverse
, int functionbody
)
553 /* The chain of decls was accumulated in reverse order.
554 Put it into forward order, just for cleanliness. */
559 int leaving_for_scope
;
562 cp_label_binding
*label_bind
;
564 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
569 gcc_assert (current_binding_level
->kind
!= sk_class
);
571 if (current_binding_level
->kind
== sk_cleanup
)
573 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
575 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
577 /* We used to use KEEP == 2 to indicate that the new block should go
578 at the beginning of the list of blocks at this binding level,
579 rather than the end. This hack is no longer used. */
580 gcc_assert (keep
== 0 || keep
== 1);
582 if (current_binding_level
->keep
)
585 /* Any uses of undefined labels, and any defined labels, now operate
586 under constraints of next binding contour. */
587 if (cfun
&& !functionbody
&& named_labels
)
588 htab_traverse (named_labels
, poplevel_named_label_1
,
589 current_binding_level
);
591 /* Get the decls in the order they were written.
592 Usually current_binding_level->names is in reverse order.
593 But parameter decls were previously put in forward order. */
596 current_binding_level
->names
597 = decls
= nreverse (current_binding_level
->names
);
599 decls
= current_binding_level
->names
;
601 /* If there were any declarations or structure tags in that level,
602 or if this level is a function body,
603 create a BLOCK to record them for the life of this function. */
605 if (keep
== 1 || functionbody
)
606 block
= make_node (BLOCK
);
607 if (block
!= NULL_TREE
)
609 BLOCK_VARS (block
) = decls
;
610 BLOCK_SUBBLOCKS (block
) = subblocks
;
613 /* In each subblock, record that this is its superior. */
615 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
616 BLOCK_SUPERCONTEXT (link
) = block
;
618 /* We still support the old for-scope rules, whereby the variables
619 in a for-init statement were in scope after the for-statement
620 ended. We only use the new rules if flag_new_for_scope is
623 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
625 /* Before we remove the declarations first check for unused variables. */
626 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
627 && !processing_template_decl
)
628 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
630 /* There are cases where D itself is a TREE_LIST. See in
631 push_local_binding where the list of decls returned by
632 getdecls is built. */
633 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
634 // See through references for improved -Wunused-variable (PR 38958).
635 tree type
= non_reference (TREE_TYPE (decl
));
637 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
638 && ! DECL_IN_SYSTEM_HEADER (decl
)
639 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
640 && type
!= error_mark_node
641 && (!CLASS_TYPE_P (type
)
642 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
643 || lookup_attribute ("warn_unused",
644 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
646 if (! TREE_USED (decl
))
647 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
648 else if (DECL_CONTEXT (decl
) == current_function_decl
649 // For -Wunused-but-set-variable leave references alone.
650 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
651 && errorcount
== unused_but_set_errorcount
)
653 warning (OPT_Wunused_but_set_variable
,
654 "variable %q+D set but not used", decl
);
655 unused_but_set_errorcount
= errorcount
;
660 /* Remove declarations for all the DECLs in this level. */
661 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
663 if (leaving_for_scope
&& VAR_P (link
)
664 /* It's hard to make this ARM compatibility hack play nicely with
665 lambdas, and it really isn't necessary in C++11 mode. */
666 && cxx_dialect
< cxx11
669 tree name
= DECL_NAME (link
);
673 ob
= outer_binding (name
,
674 IDENTIFIER_BINDING (name
),
677 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
679 ns_binding
= NULL_TREE
;
681 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
682 /* We have something like:
687 and we are leaving the `for' scope. There's no reason to
688 keep the binding of the inner `i' in this case. */
689 pop_binding (name
, link
);
690 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
691 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
692 /* Here, we have something like:
700 We must pop the for-scope binding so we know what's a
701 type and what isn't. */
702 pop_binding (name
, link
);
705 /* Mark this VAR_DECL as dead so that we can tell we left it
706 there only for backward compatibility. */
707 DECL_DEAD_FOR_LOCAL (link
) = 1;
709 /* Keep track of what should have happened when we
710 popped the binding. */
713 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
714 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
717 /* Add it to the list of dead variables in the next
718 outermost binding to that we can remove these when we
719 leave that binding. */
721 current_binding_level
->level_chain
->dead_vars_from_for
,
724 /* Although we don't pop the cxx_binding, we do clear
725 its SCOPE since the scope is going away now. */
726 IDENTIFIER_BINDING (name
)->scope
727 = current_binding_level
->level_chain
;
734 /* Remove the binding. */
737 if (TREE_CODE (decl
) == TREE_LIST
)
738 decl
= TREE_VALUE (decl
);
741 if (TREE_CODE (name
) == OVERLOAD
)
742 name
= OVL_FUNCTION (name
);
744 gcc_assert (DECL_P (name
));
745 pop_binding (DECL_NAME (name
), decl
);
749 /* Remove declarations for any `for' variables from inner scopes
750 that we kept around. */
751 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
753 pop_binding (DECL_NAME (decl
), decl
);
755 /* Restore the IDENTIFIER_TYPE_VALUEs. */
756 for (link
= current_binding_level
->type_shadowed
;
757 link
; link
= TREE_CHAIN (link
))
758 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
760 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
761 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
763 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
765 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
766 list if a `using' declaration put them there. The debugging
767 back ends won't understand OVERLOAD, so we remove them here.
768 Because the BLOCK_VARS are (temporarily) shared with
769 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
770 popped all the bindings. */
775 for (d
= &BLOCK_VARS (block
); *d
; )
777 if (TREE_CODE (*d
) == TREE_LIST
)
778 *d
= TREE_CHAIN (*d
);
780 d
= &DECL_CHAIN (*d
);
784 /* If the level being exited is the top level of a function,
785 check over all the labels. */
788 /* Since this is the top level block of a function, the vars are
789 the function's parameters. Don't leave them in the BLOCK
790 because they are found in the FUNCTION_DECL instead. */
791 BLOCK_VARS (block
) = 0;
795 kind
= current_binding_level
->kind
;
796 if (kind
== sk_cleanup
)
800 /* If this is a temporary binding created for a cleanup, then we'll
801 have pushed a statement list level. Pop that, create a new
802 BIND_EXPR for the block, and insert it into the stream. */
803 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
804 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
811 /* The current function is being defined, so its DECL_INITIAL
812 should be error_mark_node. */
813 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
814 DECL_INITIAL (current_function_decl
) = block
;
817 current_binding_level
->blocks
818 = block_chainon (current_binding_level
->blocks
, block
);
820 /* If we did not make a block for the level just exited,
821 any blocks made for inner levels
822 (since they cannot be recorded as subblocks in that level)
823 must be carried forward so they will later become subblocks
824 of something else. */
826 current_binding_level
->blocks
827 = block_chainon (current_binding_level
->blocks
, subblocks
);
829 /* Each and every BLOCK node created here in `poplevel' is important
830 (e.g. for proper debugging information) so if we created one
831 earlier, mark it as "used". */
833 TREE_USED (block
) = 1;
835 /* All temporary bindings created for cleanups are popped silently. */
836 if (kind
== sk_cleanup
)
839 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
843 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
844 itself, calling F for each. The DATA is passed to F as well. */
847 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
850 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
852 result
|= (*f
) (name_space
, data
);
854 for (; current
; current
= DECL_CHAIN (current
))
855 result
|= walk_namespaces_r (current
, f
, data
);
860 /* Walk all the namespaces, calling F for each. The DATA is passed to
864 walk_namespaces (walk_namespaces_fn f
, void* data
)
866 return walk_namespaces_r (global_namespace
, f
, data
);
869 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
870 DATA is non-NULL, this is the last time we will call
871 wrapup_global_declarations for this NAMESPACE. */
874 wrapup_globals_for_namespace (tree name_space
, void* data
)
876 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
877 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
878 tree
*vec
= statics
->address ();
879 int len
= statics
->length ();
880 int last_time
= (data
!= 0);
884 check_global_declarations (vec
, len
);
885 emit_debug_global_declarations (vec
, len
);
889 /* Write out any globals that need to be output. */
890 return wrapup_global_declarations (vec
, len
);
894 /* In C++, you don't have to write `struct S' to refer to `S'; you
895 can just use `S'. We accomplish this by creating a TYPE_DECL as
896 if the user had written `typedef struct S S'. Create and return
897 the TYPE_DECL for TYPE. */
900 create_implicit_typedef (tree name
, tree type
)
904 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
905 DECL_ARTIFICIAL (decl
) = 1;
906 /* There are other implicit type declarations, like the one *within*
907 a class that allows you to write `S::S'. We must distinguish
909 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
910 TYPE_NAME (type
) = decl
;
911 TYPE_STUB_DECL (type
) = decl
;
916 /* Remember a local name for name-mangling purposes. */
919 push_local_name (tree decl
)
924 timevar_start (TV_NAME_LOOKUP
);
926 name
= DECL_NAME (decl
);
928 nelts
= vec_safe_length (local_names
);
929 for (i
= 0; i
< nelts
; i
++)
931 t
= (*local_names
)[i
];
932 if (DECL_NAME (t
) == name
)
934 if (!DECL_LANG_SPECIFIC (decl
))
935 retrofit_lang_decl (decl
);
936 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
937 if (DECL_DISCRIMINATOR_SET_P (t
))
938 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
940 DECL_DISCRIMINATOR (decl
) = 1;
942 (*local_names
)[i
] = decl
;
943 timevar_stop (TV_NAME_LOOKUP
);
948 vec_safe_push (local_names
, decl
);
949 timevar_stop (TV_NAME_LOOKUP
);
952 /* Subroutine of duplicate_decls: return truthvalue of whether
953 or not types of these decls match.
955 For C++, we must compare the parameter list so that `int' can match
956 `int&' in a parameter position, but `int&' is not confused with
960 decls_match (tree newdecl
, tree olddecl
)
964 if (newdecl
== olddecl
)
967 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
968 /* If the two DECLs are not even the same kind of thing, we're not
969 interested in their types. */
972 gcc_assert (DECL_P (newdecl
));
974 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
976 tree f1
= TREE_TYPE (newdecl
);
977 tree f2
= TREE_TYPE (olddecl
);
978 tree p1
= TYPE_ARG_TYPES (f1
);
979 tree p2
= TYPE_ARG_TYPES (f2
);
982 /* Specializations of different templates are different functions
983 even if they have the same type. */
984 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
985 ? DECL_TI_TEMPLATE (newdecl
)
987 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
988 ? DECL_TI_TEMPLATE (olddecl
)
993 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
994 && ! (DECL_EXTERN_C_P (newdecl
)
995 && DECL_EXTERN_C_P (olddecl
)))
998 /* A new declaration doesn't match a built-in one unless it
999 is also extern "C". */
1000 if (DECL_IS_BUILTIN (olddecl
)
1001 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1004 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1007 /* A declaration with deduced return type should use its pre-deduction
1008 type for declaration matching. */
1009 r2
= fndecl_declared_return_type (olddecl
);
1011 if (same_type_p (TREE_TYPE (f1
), r2
))
1013 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1014 && (DECL_BUILT_IN (olddecl
)
1015 #ifndef NO_IMPLICIT_EXTERN_C
1016 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1017 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1021 types_match
= self_promoting_args_p (p1
);
1022 if (p1
== void_list_node
)
1023 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1025 #ifndef NO_IMPLICIT_EXTERN_C
1026 else if (!prototype_p (f1
)
1027 && (DECL_EXTERN_C_P (olddecl
)
1028 && DECL_IN_SYSTEM_HEADER (olddecl
)
1029 && !DECL_CLASS_SCOPE_P (olddecl
))
1030 && (DECL_EXTERN_C_P (newdecl
)
1031 && DECL_IN_SYSTEM_HEADER (newdecl
)
1032 && !DECL_CLASS_SCOPE_P (newdecl
)))
1034 types_match
= self_promoting_args_p (p2
);
1035 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1041 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1042 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1043 || comp_type_attributes (TREE_TYPE (newdecl
),
1044 TREE_TYPE (olddecl
)) != 0);
1049 /* The decls dont match if they correspond to two different versions
1050 of the same function. Disallow extern "C" functions to be
1051 versions for now. */
1053 && !DECL_EXTERN_C_P (newdecl
)
1054 && !DECL_EXTERN_C_P (olddecl
)
1055 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1057 /* Mark functions as versions if necessary. Modify the mangled decl
1058 name if necessary. */
1059 if (DECL_FUNCTION_VERSIONED (newdecl
)
1060 && DECL_FUNCTION_VERSIONED (olddecl
))
1062 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1064 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1065 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1066 mangle_decl (newdecl
);
1068 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1070 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1071 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1072 mangle_decl (olddecl
);
1074 cgraph_node::record_function_versions (olddecl
, newdecl
);
1078 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1080 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1081 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1084 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1085 DECL_TEMPLATE_PARMS (olddecl
)))
1088 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1089 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1090 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1092 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1093 DECL_TEMPLATE_RESULT (newdecl
));
1097 /* Need to check scope for variable declaration (VAR_DECL).
1098 For typedef (TYPE_DECL), scope is ignored. */
1100 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1102 Two declarations for an object with C language linkage
1103 with the same name (ignoring the namespace that qualify
1104 it) that appear in different namespace scopes refer to
1106 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1109 if (TREE_TYPE (newdecl
) == error_mark_node
)
1110 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1111 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1112 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1113 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1116 types_match
= comptypes (TREE_TYPE (newdecl
),
1117 TREE_TYPE (olddecl
),
1118 COMPARE_REDECLARATION
);
1124 /* If NEWDECL is `static' and an `extern' was seen previously,
1125 warn about it. OLDDECL is the previous declaration.
1127 Note that this does not apply to the C++ case of declaring
1128 a variable `extern const' and then later `const'.
1130 Don't complain about built-in functions, since they are beyond
1131 the user's control. */
1134 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1136 if (TREE_CODE (newdecl
) == TYPE_DECL
1137 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1138 || TREE_CODE (newdecl
) == CONST_DECL
1139 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1142 /* Don't get confused by static member functions; that's a different
1144 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1145 && DECL_STATIC_FUNCTION_P (newdecl
))
1148 /* If the old declaration was `static', or the new one isn't, then
1149 everything is OK. */
1150 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1153 /* It's OK to declare a builtin function as `static'. */
1154 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1155 && DECL_ARTIFICIAL (olddecl
))
1158 if (permerror (input_location
,
1159 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1160 inform (input_location
, "previous declaration of %q+D", olddecl
);
1163 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1164 function templates. If their exception specifications do not
1165 match, issue a diagnostic. */
1168 check_redeclaration_exception_specification (tree new_decl
,
1171 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1172 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1174 /* Two default specs are equivalent, don't force evaluation. */
1175 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1176 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1179 maybe_instantiate_noexcept (new_decl
);
1180 maybe_instantiate_noexcept (old_decl
);
1181 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1182 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1186 If any declaration of a function has an exception-specification,
1187 all declarations, including the definition and an explicit
1188 specialization, of that function shall have an
1189 exception-specification with the same set of type-ids. */
1190 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1191 && ! DECL_IS_BUILTIN (old_decl
)
1193 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1195 error ("declaration of %qF has a different exception specifier",
1197 error ("from previous declaration %q+F", old_decl
);
1201 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1202 Otherwise issue diagnostics. */
1205 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1207 old_decl
= STRIP_TEMPLATE (old_decl
);
1208 new_decl
= STRIP_TEMPLATE (new_decl
);
1209 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1210 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1212 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1213 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1215 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1217 if (DECL_BUILT_IN (old_decl
))
1219 /* Hide a built-in declaration. */
1220 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1221 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1224 /* 7.1.5 [dcl.constexpr]
1225 Note: An explicit specialization can differ from the template
1226 declaration with respect to the constexpr specifier. */
1227 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1228 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1231 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1232 error ("from previous declaration %q+D", old_decl
);
1238 /* DECL is a redeclaration of a function or function template. If
1239 it does have default arguments issue a diagnostic. Note: this
1240 function is used to enforce the requirements in C++11 8.3.6 about
1241 no default arguments in redeclarations. */
1244 check_redeclaration_no_default_args (tree decl
)
1246 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1248 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1249 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1250 if (TREE_PURPOSE (t
))
1252 permerror (input_location
,
1253 "redeclaration of %q#D may not have default "
1259 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1260 && lookup_attribute ("gnu_inline", \
1261 DECL_ATTRIBUTES (fn)))
1263 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1264 If the redeclaration is invalid, a diagnostic is issued, and the
1265 error_mark_node is returned. Otherwise, OLDDECL is returned.
1267 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1270 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1273 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1275 unsigned olddecl_uid
= DECL_UID (olddecl
);
1276 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1277 int new_defines_function
= 0;
1278 tree new_template_info
;
1280 if (newdecl
== olddecl
)
1283 types_match
= decls_match (newdecl
, olddecl
);
1285 /* If either the type of the new decl or the type of the old decl is an
1286 error_mark_node, then that implies that we have already issued an
1287 error (earlier) for some bogus type specification, and in that case,
1288 it is rather pointless to harass the user with yet more error message
1289 about the same declaration, so just pretend the types match here. */
1290 if (TREE_TYPE (newdecl
) == error_mark_node
1291 || TREE_TYPE (olddecl
) == error_mark_node
)
1292 return error_mark_node
;
1294 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1295 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1297 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1298 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1299 && check_raw_literal_operator (olddecl
))
1300 error ("literal operator template %q+D conflicts with"
1301 " raw literal operator %qD", newdecl
, olddecl
);
1302 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1303 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1304 && check_raw_literal_operator (newdecl
))
1305 error ("raw literal operator %q+D conflicts with"
1306 " literal operator template %qD", newdecl
, olddecl
);
1309 if (DECL_P (olddecl
)
1310 && TREE_CODE (newdecl
) == FUNCTION_DECL
1311 && TREE_CODE (olddecl
) == FUNCTION_DECL
1312 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1314 if (DECL_DECLARED_INLINE_P (newdecl
)
1315 && DECL_UNINLINABLE (newdecl
)
1316 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1317 /* Already warned elsewhere. */;
1318 else if (DECL_DECLARED_INLINE_P (olddecl
)
1319 && DECL_UNINLINABLE (olddecl
)
1320 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1321 /* Already warned. */;
1322 else if (DECL_DECLARED_INLINE_P (newdecl
)
1323 && DECL_UNINLINABLE (olddecl
)
1324 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1326 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1328 inform (DECL_SOURCE_LOCATION (olddecl
),
1329 "previous declaration of %qD with attribute noinline",
1332 else if (DECL_DECLARED_INLINE_P (olddecl
)
1333 && DECL_UNINLINABLE (newdecl
)
1334 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1336 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1337 "attribute noinline", newdecl
))
1338 inform (DECL_SOURCE_LOCATION (olddecl
),
1339 "previous declaration of %qD was inline",
1344 /* Check for redeclaration and other discrepancies. */
1345 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1346 && DECL_ARTIFICIAL (olddecl
))
1348 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1349 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1351 /* Avoid warnings redeclaring built-ins which have not been
1352 explicitly declared. */
1353 if (DECL_ANTICIPATED (olddecl
))
1356 /* If you declare a built-in or predefined function name as static,
1357 the old definition is overridden, but optionally warn this was a
1358 bad choice of name. */
1359 if (! TREE_PUBLIC (newdecl
))
1361 warning (OPT_Wshadow
,
1362 DECL_BUILT_IN (olddecl
)
1363 ? G_("shadowing built-in function %q#D")
1364 : G_("shadowing library function %q#D"), olddecl
);
1365 /* Discard the old built-in function. */
1368 /* If the built-in is not ansi, then programs can override
1369 it even globally without an error. */
1370 else if (! DECL_BUILT_IN (olddecl
))
1371 warning (0, "library function %q#D redeclared as non-function %q#D",
1374 error ("declaration of %q#D conflicts with built-in "
1375 "declaration %q#D", newdecl
, olddecl
);
1378 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1380 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1381 error_at (DECL_SOURCE_LOCATION (newdecl
),
1382 "redeclaration of %<pragma omp declare reduction%>");
1383 inform (DECL_SOURCE_LOCATION (olddecl
),
1384 "previous %<pragma omp declare reduction%> declaration");
1385 return error_mark_node
;
1387 else if (!types_match
)
1389 /* Avoid warnings redeclaring built-ins which have not been
1390 explicitly declared. */
1391 if (DECL_ANTICIPATED (olddecl
))
1393 /* Deal with fileptr_type_node. FILE type is not known
1394 at the time we create the builtins. */
1397 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1398 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1400 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1403 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1405 tree t
= TREE_VALUE (t1
);
1408 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1409 == get_identifier ("FILE")
1410 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1412 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1414 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1415 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1416 types_match
= decls_match (newdecl
, olddecl
);
1418 return duplicate_decls (newdecl
, olddecl
,
1420 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1423 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1426 else if ((DECL_EXTERN_C_P (newdecl
)
1427 && DECL_EXTERN_C_P (olddecl
))
1428 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1429 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1431 /* A near match; override the builtin. */
1433 if (TREE_PUBLIC (newdecl
))
1434 warning (0, "new declaration %q#D ambiguates built-in "
1435 "declaration %q#D", newdecl
, olddecl
);
1437 warning (OPT_Wshadow
,
1438 DECL_BUILT_IN (olddecl
)
1439 ? G_("shadowing built-in function %q#D")
1440 : G_("shadowing library function %q#D"), olddecl
);
1443 /* Discard the old built-in function. */
1446 /* Replace the old RTL to avoid problems with inlining. */
1447 COPY_DECL_RTL (newdecl
, olddecl
);
1449 /* Even if the types match, prefer the new declarations type for
1450 built-ins which have not been explicitly declared, for
1451 exception lists, etc... */
1452 else if (DECL_IS_BUILTIN (olddecl
))
1454 tree type
= TREE_TYPE (newdecl
);
1455 tree attribs
= (*targetm
.merge_type_attributes
)
1456 (TREE_TYPE (olddecl
), type
);
1458 type
= cp_build_type_attribute_variant (type
, attribs
);
1459 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1462 /* If a function is explicitly declared "throw ()", propagate that to
1463 the corresponding builtin. */
1464 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1465 && DECL_ANTICIPATED (olddecl
)
1466 && TREE_NOTHROW (newdecl
)
1467 && !TREE_NOTHROW (olddecl
))
1469 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1470 tree tmpdecl
= builtin_decl_explicit (fncode
);
1471 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1472 TREE_NOTHROW (tmpdecl
) = 1;
1475 /* Whether or not the builtin can throw exceptions has no
1476 bearing on this declarator. */
1477 TREE_NOTHROW (olddecl
) = 0;
1479 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1481 /* If a builtin function is redeclared as `static', merge
1482 the declarations, but make the original one static. */
1483 DECL_THIS_STATIC (olddecl
) = 1;
1484 TREE_PUBLIC (olddecl
) = 0;
1486 /* Make the old declaration consistent with the new one so
1487 that all remnants of the builtin-ness of this function
1488 will be banished. */
1489 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1490 COPY_DECL_RTL (newdecl
, olddecl
);
1493 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1495 /* C++ Standard, 3.3, clause 4:
1496 "[Note: a namespace name or a class template name must be unique
1497 in its declarative region (7.3.2, clause 14). ]" */
1498 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1499 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1500 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1501 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1502 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1503 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1505 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1506 && TREE_CODE (newdecl
) != TYPE_DECL
)
1507 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1508 && TREE_CODE (olddecl
) != TYPE_DECL
))
1510 /* We do nothing special here, because C++ does such nasty
1511 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1512 get shadowed, and know that if we need to find a TYPE_DECL
1513 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1514 slot of the identifier. */
1518 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1519 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1520 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1521 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1525 error ("%q#D redeclared as different kind of symbol", newdecl
);
1526 if (TREE_CODE (olddecl
) == TREE_LIST
)
1527 olddecl
= TREE_VALUE (olddecl
);
1528 inform (DECL_SOURCE_LOCATION (olddecl
),
1529 "previous declaration %q#D", olddecl
);
1531 return error_mark_node
;
1533 else if (!types_match
)
1535 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1536 /* These are certainly not duplicate declarations; they're
1537 from different scopes. */
1540 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1542 /* The name of a class template may not be declared to refer to
1543 any other template, class, function, object, namespace, value,
1544 or type in the same scope. */
1545 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1546 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1548 error ("conflicting declaration of template %q#D", newdecl
);
1549 inform (DECL_SOURCE_LOCATION (olddecl
),
1550 "previous declaration %q#D", olddecl
);
1551 return error_mark_node
;
1553 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1554 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1555 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1556 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1557 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1558 DECL_TEMPLATE_PARMS (olddecl
))
1559 /* Template functions can be disambiguated by
1561 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1562 TREE_TYPE (TREE_TYPE (olddecl
))))
1564 error ("ambiguating new declaration %q#D", newdecl
);
1565 inform (DECL_SOURCE_LOCATION (olddecl
),
1566 "old declaration %q#D", olddecl
);
1570 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1572 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1574 error ("conflicting declaration of C function %q#D",
1576 inform (DECL_SOURCE_LOCATION (olddecl
),
1577 "previous declaration %q#D", olddecl
);
1580 /* For function versions, params and types match, but they
1581 are not ambiguous. */
1582 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1583 && !DECL_FUNCTION_VERSIONED (olddecl
))
1584 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1585 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1587 error ("ambiguating new declaration of %q#D", newdecl
);
1588 inform (DECL_SOURCE_LOCATION (olddecl
),
1589 "old declaration %q#D", olddecl
);
1590 return error_mark_node
;
1597 error ("conflicting declaration %q#D", newdecl
);
1598 inform (DECL_SOURCE_LOCATION (olddecl
),
1599 "previous declaration as %q#D", olddecl
);
1600 return error_mark_node
;
1603 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1604 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1605 && (!DECL_TEMPLATE_INFO (newdecl
)
1606 || (DECL_TI_TEMPLATE (newdecl
)
1607 != DECL_TI_TEMPLATE (olddecl
))))
1608 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1609 && (!DECL_TEMPLATE_INFO (olddecl
)
1610 || (DECL_TI_TEMPLATE (olddecl
)
1611 != DECL_TI_TEMPLATE (newdecl
))))))
1612 /* It's OK to have a template specialization and a non-template
1613 with the same type, or to have specializations of two
1614 different templates with the same type. Note that if one is a
1615 specialization, and the other is an instantiation of the same
1616 template, that we do not exit at this point. That situation
1617 can occur if we instantiate a template class, and then
1618 specialize one of its methods. This situation is valid, but
1619 the declarations must be merged in the usual way. */
1621 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1622 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1623 && !DECL_USE_TEMPLATE (newdecl
))
1624 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1625 && !DECL_USE_TEMPLATE (olddecl
))))
1626 /* One of the declarations is a template instantiation, and the
1627 other is not a template at all. That's OK. */
1629 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1631 /* In [namespace.alias] we have:
1633 In a declarative region, a namespace-alias-definition can be
1634 used to redefine a namespace-alias declared in that declarative
1635 region to refer only to the namespace to which it already
1638 Therefore, if we encounter a second alias directive for the same
1639 alias, we can just ignore the second directive. */
1640 if (DECL_NAMESPACE_ALIAS (newdecl
)
1641 && (DECL_NAMESPACE_ALIAS (newdecl
)
1642 == DECL_NAMESPACE_ALIAS (olddecl
)))
1644 /* [namespace.alias]
1646 A namespace-name or namespace-alias shall not be declared as
1647 the name of any other entity in the same declarative region.
1648 A namespace-name defined at global scope shall not be
1649 declared as the name of any other entity in any global scope
1651 error ("conflicting declaration of namespace %qD", newdecl
);
1652 inform (DECL_SOURCE_LOCATION (olddecl
),
1653 "previous declaration of namespace %qD here", olddecl
);
1654 return error_mark_node
;
1658 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1661 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1662 if (DECL_NAME (olddecl
) != NULL_TREE
)
1663 inform (input_location
,
1664 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1665 ? G_("%q+#D previously defined here")
1666 : G_("%q+#D previously declared here"), olddecl
);
1667 return error_mark_node
;
1669 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1670 && DECL_INITIAL (olddecl
) != NULL_TREE
1671 && !prototype_p (TREE_TYPE (olddecl
))
1672 && prototype_p (TREE_TYPE (newdecl
)))
1674 /* Prototype decl follows defn w/o prototype. */
1675 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1676 "prototype specified for %q#D", newdecl
))
1677 inform (DECL_SOURCE_LOCATION (olddecl
),
1678 "previous non-prototype definition here");
1680 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1681 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1684 If two declarations of the same function or object
1685 specify different linkage-specifications ..., the program
1686 is ill-formed.... Except for functions with C++ linkage,
1687 a function declaration without a linkage specification
1688 shall not precede the first linkage specification for
1689 that function. A function can be declared without a
1690 linkage specification after an explicit linkage
1691 specification has been seen; the linkage explicitly
1692 specified in the earlier declaration is not affected by
1693 such a function declaration.
1695 DR 563 raises the question why the restrictions on
1696 functions should not also apply to objects. Older
1697 versions of G++ silently ignore the linkage-specification
1705 which is clearly wrong. Therefore, we now treat objects
1707 if (current_lang_depth () == 0)
1709 /* There is no explicit linkage-specification, so we use
1710 the linkage from the previous declaration. */
1711 if (!DECL_LANG_SPECIFIC (newdecl
))
1712 retrofit_lang_decl (newdecl
);
1713 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1717 error ("conflicting declaration of %q#D with %qL linkage",
1718 newdecl
, DECL_LANGUAGE (newdecl
));
1719 inform (DECL_SOURCE_LOCATION (olddecl
),
1720 "previous declaration with %qL linkage",
1721 DECL_LANGUAGE (olddecl
));
1725 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1727 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1729 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1730 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1731 && (/* grokfndecl passes member function templates too
1732 as FUNCTION_DECLs. */
1733 DECL_TEMPLATE_INFO (olddecl
)
1735 Default arguments for a member function of a class
1736 template shall be specified on the initial declaration
1737 of the member function within the class template. */
1738 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1739 check_redeclaration_no_default_args (newdecl
);
1742 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1743 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1746 for (; t1
&& t1
!= void_list_node
;
1747 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1748 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1750 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1753 if (permerror (input_location
,
1754 "default argument given for parameter "
1755 "%d of %q#D", i
, newdecl
))
1756 inform (DECL_SOURCE_LOCATION (olddecl
),
1757 "previous specification in %q#D here",
1762 error ("default argument given for parameter %d "
1763 "of %q#D", i
, newdecl
);
1764 inform (DECL_SOURCE_LOCATION (olddecl
),
1765 "previous specification in %q#D here",
1773 /* Do not merge an implicit typedef with an explicit one. In:
1777 typedef class A A __attribute__ ((foo));
1779 the attribute should apply only to the typedef. */
1780 if (TREE_CODE (olddecl
) == TYPE_DECL
1781 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1782 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1785 /* If new decl is `static' and an `extern' was seen previously,
1787 warn_extern_redeclared_static (newdecl
, olddecl
);
1789 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1790 return error_mark_node
;
1792 /* We have committed to returning 1 at this point. */
1793 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1795 /* Now that functions must hold information normally held
1796 by field decls, there is extra work to do so that
1797 declaration information does not get destroyed during
1799 if (DECL_VINDEX (olddecl
))
1800 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1801 if (DECL_CONTEXT (olddecl
))
1802 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1803 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1804 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1805 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1806 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1807 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1808 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1809 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1810 SET_OVERLOADED_OPERATOR_CODE
1811 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1812 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1814 /* Optionally warn about more than one declaration for the same
1815 name, but don't warn about a function declaration followed by a
1817 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1818 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1819 /* Don't warn about extern decl followed by definition. */
1820 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1821 /* Don't warn about friends, let add_friend take care of it. */
1822 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1823 /* Don't warn about declaration followed by specialization. */
1824 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1825 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1827 if (warning (OPT_Wredundant_decls
,
1828 "redundant redeclaration of %qD in same scope",
1830 inform (DECL_SOURCE_LOCATION (olddecl
),
1831 "previous declaration of %qD", olddecl
);
1834 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1835 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1837 if (DECL_DELETED_FN (newdecl
))
1839 error ("deleted definition of %qD", newdecl
);
1840 inform (DECL_SOURCE_LOCATION (olddecl
),
1841 "previous declaration of %qD", olddecl
);
1843 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1847 /* Deal with C++: must preserve virtual function table size. */
1848 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1850 tree newtype
= TREE_TYPE (newdecl
);
1851 tree oldtype
= TREE_TYPE (olddecl
);
1853 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1854 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1855 CLASSTYPE_FRIEND_CLASSES (newtype
)
1856 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1858 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1861 /* Copy all the DECL_... slots specified in the new decl
1862 except for any that we copy here from the old type. */
1863 DECL_ATTRIBUTES (newdecl
)
1864 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1866 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1870 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1871 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1872 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1873 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1874 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1875 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1877 DECL_ATTRIBUTES (old_result
)
1878 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1880 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1882 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1883 declarations of a function template. */
1884 check_redeclaration_no_default_args (newdecl
);
1886 check_default_args (newdecl
);
1888 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1889 && DECL_INITIAL (new_result
))
1891 if (DECL_INITIAL (old_result
))
1892 DECL_UNINLINABLE (old_result
) = 1;
1894 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1895 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1896 DECL_NOT_REALLY_EXTERN (old_result
)
1897 = DECL_NOT_REALLY_EXTERN (new_result
);
1898 DECL_INTERFACE_KNOWN (old_result
)
1899 = DECL_INTERFACE_KNOWN (new_result
);
1900 DECL_DECLARED_INLINE_P (old_result
)
1901 = DECL_DECLARED_INLINE_P (new_result
);
1902 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1903 |= DECL_DISREGARD_INLINE_LIMITS (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
);
1912 check_redeclaration_exception_specification (newdecl
, olddecl
);
1916 /* If the new declaration is a definition, update the file and
1917 line information on the declaration, and also make
1918 the old declaration the same definition. */
1919 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1921 DECL_SOURCE_LOCATION (olddecl
)
1922 = DECL_SOURCE_LOCATION (old_result
)
1923 = DECL_SOURCE_LOCATION (newdecl
);
1924 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1925 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1928 DECL_ARGUMENTS (old_result
)
1929 = DECL_ARGUMENTS (new_result
);
1930 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1931 parm
= DECL_CHAIN (parm
))
1932 DECL_CONTEXT (parm
) = old_result
;
1941 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1942 check_redeclaration_exception_specification (newdecl
, olddecl
);
1944 /* Automatically handles default parameters. */
1945 tree oldtype
= TREE_TYPE (olddecl
);
1948 /* For typedefs use the old type, as the new type's DECL_NAME points
1949 at newdecl, which will be ggc_freed. */
1950 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1953 /* Merge the data types specified in the two decls. */
1954 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1956 if (VAR_P (newdecl
))
1958 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1959 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1960 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1961 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1962 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1963 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1965 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1966 if (DECL_LANG_SPECIFIC (olddecl
)
1967 && CP_DECL_THREADPRIVATE_P (olddecl
))
1969 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1970 if (!DECL_LANG_SPECIFIC (newdecl
))
1971 retrofit_lang_decl (newdecl
);
1973 set_decl_tls_model (newdecl
, DECL_TLS_MODEL (olddecl
));
1974 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1978 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1980 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1981 check_default_args (newdecl
);
1983 /* Lay the type out, unless already done. */
1984 if (! same_type_p (newtype
, oldtype
)
1985 && TREE_TYPE (newdecl
) != error_mark_node
1986 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1987 layout_type (TREE_TYPE (newdecl
));
1989 if ((VAR_P (newdecl
)
1990 || TREE_CODE (newdecl
) == PARM_DECL
1991 || TREE_CODE (newdecl
) == RESULT_DECL
1992 || TREE_CODE (newdecl
) == FIELD_DECL
1993 || TREE_CODE (newdecl
) == TYPE_DECL
)
1994 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1995 layout_decl (newdecl
, 0);
1997 /* Merge the type qualifiers. */
1998 if (TREE_READONLY (newdecl
))
1999 TREE_READONLY (olddecl
) = 1;
2000 if (TREE_THIS_VOLATILE (newdecl
))
2001 TREE_THIS_VOLATILE (olddecl
) = 1;
2002 if (TREE_NOTHROW (newdecl
))
2003 TREE_NOTHROW (olddecl
) = 1;
2005 /* Merge deprecatedness. */
2006 if (TREE_DEPRECATED (newdecl
))
2007 TREE_DEPRECATED (olddecl
) = 1;
2009 /* Preserve function specific target and optimization options */
2010 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2012 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2013 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2014 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2015 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2017 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2018 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2019 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2020 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2023 /* Merge the initialization information. */
2024 if (DECL_INITIAL (newdecl
) == NULL_TREE
2025 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2027 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2028 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2029 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2031 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2032 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2036 /* Merge the section attribute.
2037 We want to issue an error if the sections conflict but that must be
2038 done later in decl_attributes since we are called before attributes
2040 if ((DECL_EXTERNAL (olddecl
) || TREE_PUBLIC (olddecl
) || TREE_STATIC (olddecl
))
2041 && DECL_SECTION_NAME (newdecl
) == NULL
2042 && DECL_SECTION_NAME (olddecl
) != NULL
)
2043 set_decl_section_name (newdecl
, DECL_SECTION_NAME (olddecl
));
2045 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2047 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2048 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2049 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2050 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2051 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2052 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2053 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2054 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2055 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2056 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2057 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2058 /* Keep the old RTL. */
2059 COPY_DECL_RTL (olddecl
, newdecl
);
2061 else if (VAR_P (newdecl
)
2062 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2064 /* Keep the old RTL. We cannot keep the old RTL if the old
2065 declaration was for an incomplete object and the new
2066 declaration is not since many attributes of the RTL will
2068 COPY_DECL_RTL (olddecl
, newdecl
);
2071 /* If cannot merge, then use the new type and qualifiers,
2072 and don't preserve the old rtl. */
2075 /* Clean out any memory we had of the old declaration. */
2076 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2078 TREE_VALUE (oldstatic
) = error_mark_node
;
2080 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2081 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2082 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2083 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2086 /* Merge the storage class information. */
2087 merge_weak (newdecl
, olddecl
);
2089 if ((TREE_CODE (olddecl
) == FUNCTION_DECL
|| TREE_CODE (olddecl
) == VAR_DECL
)
2090 && (DECL_EXTERNAL (olddecl
) || TREE_PUBLIC (olddecl
) || TREE_STATIC (olddecl
))
2091 && DECL_ONE_ONLY (olddecl
))
2093 struct symtab_node
*symbol
;
2094 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2095 symbol
= cgraph_node::get_create (newdecl
);
2097 symbol
= varpool_node::get_create (newdecl
);
2098 symbol
->set_comdat_group (symtab_node::get
2099 (olddecl
)->get_comdat_group ());
2102 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2103 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2104 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2105 if (! DECL_EXTERNAL (olddecl
))
2106 DECL_EXTERNAL (newdecl
) = 0;
2108 new_template_info
= NULL_TREE
;
2109 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2111 bool new_redefines_gnu_inline
= false;
2113 if (new_defines_function
2114 && ((DECL_INTERFACE_KNOWN (olddecl
)
2115 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2116 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2117 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2118 == FUNCTION_DECL
))))
2122 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2123 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2125 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2128 if (!new_redefines_gnu_inline
)
2130 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2131 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2132 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2134 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2135 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2136 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2138 /* If the OLDDECL is an instantiation and/or specialization,
2139 then the NEWDECL must be too. But, it may not yet be marked
2140 as such if the caller has created NEWDECL, but has not yet
2141 figured out that it is a redeclaration. */
2142 if (!DECL_USE_TEMPLATE (newdecl
))
2143 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2145 /* Don't really know how much of the language-specific
2146 values we should copy from old to new. */
2147 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2148 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2149 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2150 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2152 if (LANG_DECL_HAS_MIN (newdecl
))
2154 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2155 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2156 if (DECL_TEMPLATE_INFO (newdecl
))
2157 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2158 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2160 /* Only functions have these fields. */
2161 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2163 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2164 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2165 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2166 && DECL_HIDDEN_FRIEND_P (olddecl
)
2167 && newdecl_is_friend
);
2168 DECL_BEFRIENDING_CLASSES (newdecl
)
2169 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2170 DECL_BEFRIENDING_CLASSES (olddecl
));
2171 /* DECL_THUNKS is only valid for virtual functions,
2172 otherwise it is a DECL_FRIEND_CONTEXT. */
2173 if (DECL_VIRTUAL_P (newdecl
))
2174 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2176 /* Only variables have this field. */
2177 else if (VAR_P (newdecl
)
2178 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2179 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2182 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2186 /* Merge parameter attributes. */
2187 tree oldarg
, newarg
;
2188 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2189 newarg
= DECL_ARGUMENTS(newdecl
);
2191 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2192 DECL_ATTRIBUTES (newarg
)
2193 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2194 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2197 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2198 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2200 /* If newdecl is not a specialization, then it is not a
2201 template-related function at all. And that means that we
2202 should have exited above, returning 0. */
2203 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2205 if (DECL_ODR_USED (olddecl
))
2206 /* From [temp.expl.spec]:
2208 If a template, a member template or the member of a class
2209 template is explicitly specialized then that
2210 specialization shall be declared before the first use of
2211 that specialization that would cause an implicit
2212 instantiation to take place, in every translation unit in
2213 which such a use occurs. */
2214 error ("explicit specialization of %qD after first use",
2217 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2218 DECL_COMDAT (newdecl
) = DECL_DECLARED_INLINE_P (olddecl
);
2220 /* Don't propagate visibility from the template to the
2221 specialization here. We'll do that in determine_visibility if
2223 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2225 /* [temp.expl.spec/14] We don't inline explicit specialization
2226 just because the primary template says so. */
2228 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2229 the always_inline attribute. */
2230 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2231 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2233 if (DECL_DECLARED_INLINE_P (newdecl
))
2234 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2236 DECL_ATTRIBUTES (newdecl
)
2237 = remove_attribute ("always_inline",
2238 DECL_ATTRIBUTES (newdecl
));
2241 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2243 /* Never inline re-defined extern inline functions.
2244 FIXME: this could be better handled by keeping both
2245 function as separate declarations. */
2246 DECL_UNINLINABLE (newdecl
) = 1;
2250 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2251 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2253 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2255 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2256 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2258 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2259 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2260 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2261 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2264 /* Preserve abstractness on cloned [cd]tors. */
2265 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2267 /* Update newdecl's parms to point at olddecl. */
2268 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2269 parm
= DECL_CHAIN (parm
))
2270 DECL_CONTEXT (parm
) = olddecl
;
2274 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2275 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2276 COPY_DECL_RTL (newdecl
, olddecl
);
2278 if (! types_match
|| new_defines_function
)
2280 /* These need to be copied so that the names are available.
2281 Note that if the types do match, we'll preserve inline
2282 info and other bits, but if not, we won't. */
2283 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2284 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2286 /* If redeclaring a builtin function, it stays built in
2287 if newdecl is a gnu_inline definition, or if newdecl is just
2289 if (DECL_BUILT_IN (olddecl
)
2290 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2292 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2293 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2294 /* If we're keeping the built-in definition, keep the rtl,
2295 regardless of declaration matches. */
2296 COPY_DECL_RTL (olddecl
, newdecl
);
2297 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2299 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2302 /* If a compatible prototype of these builtin functions
2303 is seen, assume the runtime implements it with the
2304 expected semantics. */
2305 case BUILT_IN_STPCPY
:
2306 if (builtin_decl_explicit_p (fncode
))
2307 set_builtin_decl_implicit_p (fncode
, true);
2314 if (new_defines_function
)
2315 /* If defining a function declared with other language
2316 linkage, use the previously declared language linkage. */
2317 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2318 else if (types_match
)
2320 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2321 /* Don't clear out the arguments if we're just redeclaring a
2323 if (DECL_ARGUMENTS (olddecl
))
2324 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2327 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2328 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2330 /* Now preserve various other info from the definition. */
2331 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2332 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2333 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2334 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2336 /* Warn about conflicting visibility specifications. */
2337 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2338 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2339 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2341 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2342 "%qD: visibility attribute ignored because it "
2343 "conflicts with previous declaration", newdecl
))
2344 inform (DECL_SOURCE_LOCATION (olddecl
),
2345 "previous declaration of %qD", olddecl
);
2347 /* Choose the declaration which specified visibility. */
2348 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2350 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2351 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2353 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2354 so keep this behavior. */
2355 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2357 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2358 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2360 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2361 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2363 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2364 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2366 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2367 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2368 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2370 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2371 with that from NEWDECL below. */
2372 if (DECL_LANG_SPECIFIC (olddecl
))
2374 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2375 != DECL_LANG_SPECIFIC (newdecl
));
2376 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2379 /* Merge the USED information. */
2380 if (TREE_USED (olddecl
))
2381 TREE_USED (newdecl
) = 1;
2382 else if (TREE_USED (newdecl
))
2383 TREE_USED (olddecl
) = 1;
2384 if (VAR_P (newdecl
))
2386 if (DECL_READ_P (olddecl
))
2387 DECL_READ_P (newdecl
) = 1;
2388 else if (DECL_READ_P (newdecl
))
2389 DECL_READ_P (olddecl
) = 1;
2391 if (DECL_PRESERVE_P (olddecl
))
2392 DECL_PRESERVE_P (newdecl
) = 1;
2393 else if (DECL_PRESERVE_P (newdecl
))
2394 DECL_PRESERVE_P (olddecl
) = 1;
2396 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2397 to olddecl and deleted. */
2398 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2399 && DECL_FUNCTION_VERSIONED (olddecl
))
2401 /* Set the flag for newdecl so that it gets copied to olddecl. */
2402 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2403 /* newdecl will be purged after copying to olddecl and is no longer
2405 cgraph_node::delete_function_version (newdecl
);
2408 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2411 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2413 function_size
= sizeof (struct tree_decl_common
);
2415 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2416 (char *) newdecl
+ sizeof (struct tree_common
),
2417 function_size
- sizeof (struct tree_common
));
2419 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2420 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2421 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2423 /* Preserve symtab node mapping. */
2424 olddecl
->decl_with_vis
.symtab_node
= snode
;
2426 if (new_template_info
)
2427 /* If newdecl is a template instantiation, it is possible that
2428 the following sequence of events has occurred:
2430 o A friend function was declared in a class template. The
2431 class template was instantiated.
2433 o The instantiation of the friend declaration was
2434 recorded on the instantiation list, and is newdecl.
2436 o Later, however, instantiate_class_template called pushdecl
2437 on the newdecl to perform name injection. But, pushdecl in
2438 turn called duplicate_decls when it discovered that another
2439 declaration of a global function with the same name already
2442 o Here, in duplicate_decls, we decided to clobber newdecl.
2444 If we're going to do that, we'd better make sure that
2445 olddecl, and not newdecl, is on the list of
2446 instantiations so that if we try to do the instantiation
2447 again we won't get the clobbered declaration. */
2448 reregister_specialization (newdecl
,
2454 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2456 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2457 (char *) newdecl
+ sizeof (struct tree_common
),
2458 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2459 switch (TREE_CODE (olddecl
))
2469 struct symtab_node
*snode
= NULL
;
2471 if (TREE_CODE (olddecl
) == VAR_DECL
2472 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2473 snode
= symtab_node::get (olddecl
);
2474 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2475 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2476 size
- sizeof (struct tree_decl_common
)
2477 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2478 if (TREE_CODE (olddecl
) == VAR_DECL
)
2479 olddecl
->decl_with_vis
.symtab_node
= snode
;
2483 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2484 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2485 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2486 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2490 DECL_UID (olddecl
) = olddecl_uid
;
2492 DECL_FRIEND_P (olddecl
) = 1;
2495 DECL_ANTICIPATED (olddecl
) = 1;
2496 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2499 /* NEWDECL contains the merged attribute lists.
2500 Update OLDDECL to be the same. */
2501 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2503 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2504 so that encode_section_info has a chance to look at the new decl
2505 flags and attributes. */
2506 if (DECL_RTL_SET_P (olddecl
)
2507 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2509 && TREE_STATIC (olddecl
))))
2510 make_decl_rtl (olddecl
);
2512 /* The NEWDECL will no longer be needed. Because every out-of-class
2513 declaration of a member results in a call to duplicate_decls,
2514 freeing these nodes represents in a significant savings.
2516 Before releasing the node, be sore to remove function from symbol
2517 table that might have been inserted there to record comdat group.
2518 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2519 structure is shared in between newdecl and oldecl. */
2520 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2521 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2522 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2523 || TREE_CODE (newdecl
) == VAR_DECL
)
2525 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2534 /* Return zero if the declaration NEWDECL is valid
2535 when the declaration OLDDECL (assumed to be for the same name)
2536 has already been seen.
2537 Otherwise return an error message format string with a %s
2538 where the identifier should go. */
2541 redeclaration_error_message (tree newdecl
, tree olddecl
)
2543 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2545 /* Because C++ can put things into name space for free,
2546 constructs like "typedef struct foo { ... } foo"
2547 would look like an erroneous redeclaration. */
2548 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2551 return G_("redefinition of %q#D");
2553 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2555 /* If this is a pure function, its olddecl will actually be
2556 the original initialization to `0' (which we force to call
2557 abort()). Don't complain about redefinition in this case. */
2558 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2559 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2562 /* If both functions come from different namespaces, this is not
2563 a redeclaration - this is a conflict with a used function. */
2564 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2565 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2566 && ! decls_match (olddecl
, newdecl
))
2567 return G_("%qD conflicts with used function");
2569 /* We'll complain about linkage mismatches in
2570 warn_extern_redeclared_static. */
2572 /* Defining the same name twice is no good. */
2573 if (DECL_INITIAL (olddecl
) != NULL_TREE
2574 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2576 if (DECL_NAME (olddecl
) == NULL_TREE
)
2577 return G_("%q#D not declared in class");
2578 else if (!GNU_INLINE_P (olddecl
)
2579 || GNU_INLINE_P (newdecl
))
2580 return G_("redefinition of %q#D");
2583 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2585 bool olda
= GNU_INLINE_P (olddecl
);
2586 bool newa
= GNU_INLINE_P (newdecl
);
2591 return G_("%q+D redeclared inline with "
2592 "%<gnu_inline%> attribute");
2594 return G_("%q+D redeclared inline without "
2595 "%<gnu_inline%> attribute");
2599 check_abi_tag_redeclaration
2600 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2601 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2605 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2609 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2611 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2612 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2613 return G_("redefinition of %q#D");
2617 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2618 || (DECL_TEMPLATE_RESULT (newdecl
)
2619 == DECL_TEMPLATE_RESULT (olddecl
)))
2622 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2623 if (DECL_TEMPLATE_INFO (nt
))
2624 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2625 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2626 if (DECL_TEMPLATE_INFO (ot
))
2627 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2628 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2629 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2630 return G_("redefinition of %q#D");
2632 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2634 bool olda
= GNU_INLINE_P (ot
);
2635 bool newa
= GNU_INLINE_P (nt
);
2640 return G_("%q+D redeclared inline with "
2641 "%<gnu_inline%> attribute");
2643 return G_("%q+D redeclared inline without "
2644 "%<gnu_inline%> attribute");
2648 /* Core issue #226 (C++0x):
2650 If a friend function template declaration specifies a
2651 default template-argument, that declaration shall be a
2652 definition and shall be the only declaration of the
2653 function template in the translation unit. */
2654 if ((cxx_dialect
!= cxx98
)
2655 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2656 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2657 /*is_primary=*/true,
2658 /*is_partial=*/false,
2659 /*is_friend_decl=*/2))
2660 return G_("redeclaration of friend %q#D "
2661 "may not have default template arguments");
2665 else if (VAR_P (newdecl
)
2666 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2667 && (! DECL_LANG_SPECIFIC (olddecl
)
2668 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2669 || DECL_THREAD_LOCAL_P (newdecl
)))
2671 /* Only variables can be thread-local, and all declarations must
2672 agree on this property. */
2673 if (DECL_THREAD_LOCAL_P (newdecl
))
2674 return G_("thread-local declaration of %q#D follows "
2675 "non-thread-local declaration");
2677 return G_("non-thread-local declaration of %q#D follows "
2678 "thread-local declaration");
2680 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2682 /* The objects have been declared at namespace scope. If either
2683 is a member of an anonymous union, then this is an invalid
2684 redeclaration. For example:
2690 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2691 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2692 return G_("redeclaration of %q#D");
2693 /* If at least one declaration is a reference, there is no
2694 conflict. For example:
2700 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2702 /* Reject two definitions. */
2703 return G_("redefinition of %q#D");
2707 /* Objects declared with block scope: */
2708 /* Reject two definitions, and reject a definition
2709 together with an external reference. */
2710 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2711 return G_("redeclaration of %q#D");
2716 /* Hash and equality functions for the named_label table. */
2719 named_label_entry_hash (const void *data
)
2721 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2722 return DECL_UID (ent
->label_decl
);
2726 named_label_entry_eq (const void *a
, const void *b
)
2728 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2729 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2730 return ent_a
->label_decl
== ent_b
->label_decl
;
2733 /* Create a new label, named ID. */
2736 make_label_decl (tree id
, int local_p
)
2738 struct named_label_entry
*ent
;
2742 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2744 DECL_CONTEXT (decl
) = current_function_decl
;
2745 DECL_MODE (decl
) = VOIDmode
;
2746 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2748 /* Say where one reference is to the label, for the sake of the
2749 error if it is not defined. */
2750 DECL_SOURCE_LOCATION (decl
) = input_location
;
2752 /* Record the fact that this identifier is bound to this label. */
2753 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2755 /* Create the label htab for the function on demand. */
2757 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2758 named_label_entry_eq
, NULL
);
2760 /* Record this label on the list of labels used in this function.
2761 We do this before calling make_label_decl so that we get the
2762 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2763 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2764 ent
->label_decl
= decl
;
2766 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2767 gcc_assert (*slot
== NULL
);
2773 /* Look for a label named ID in the current function. If one cannot
2774 be found, create one. (We keep track of used, but undefined,
2775 labels, and complain about them at the end of a function.) */
2778 lookup_label_1 (tree id
)
2782 /* You can't use labels at global scope. */
2783 if (current_function_decl
== NULL_TREE
)
2785 error ("label %qE referenced outside of any function", id
);
2789 /* See if we've already got this label. */
2790 decl
= IDENTIFIER_LABEL_VALUE (id
);
2791 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2794 decl
= make_label_decl (id
, /*local_p=*/0);
2798 /* Wrapper for lookup_label_1. */
2801 lookup_label (tree id
)
2804 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2805 ret
= lookup_label_1 (id
);
2806 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2810 /* Declare a local label named ID. */
2813 declare_local_label (tree id
)
2816 cp_label_binding bind
;
2818 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2819 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2820 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2822 decl
= make_label_decl (id
, /*local_p=*/1);
2824 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2829 /* Returns nonzero if it is ill-formed to jump past the declaration of
2830 DECL. Returns 2 if it's also a real problem. */
2833 decl_jump_unsafe (tree decl
)
2835 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2836 with automatic storage duration is not in scope to a point where it is
2837 in scope is ill-formed unless the variable has scalar type, class type
2838 with a trivial default constructor and a trivial destructor, a
2839 cv-qualified version of one of these types, or an array of one of the
2840 preceding types and is declared without an initializer (8.5). */
2841 tree type
= TREE_TYPE (decl
);
2843 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2844 || type
== error_mark_node
)
2847 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2848 || variably_modified_type_p (type
, NULL_TREE
))
2851 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2857 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2860 identify_goto (tree decl
, const location_t
*locus
)
2863 permerror (input_location
, "jump to label %qD", decl
);
2865 permerror (input_location
, "jump to case label");
2867 permerror (*locus
, " from here");
2870 /* Check that a single previously seen jump to a newly defined label
2871 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2872 the jump context; NAMES are the names in scope in LEVEL at the jump
2873 context; LOCUS is the source position of the jump or 0. Returns
2874 true if all is well. */
2877 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2878 bool exited_omp
, const location_t
*locus
)
2880 cp_binding_level
*b
;
2881 bool identified
= false, saw_eh
= false, saw_omp
= false;
2885 identify_goto (decl
, locus
);
2886 error (" exits OpenMP structured block");
2887 identified
= saw_omp
= true;
2890 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2892 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2894 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2895 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2896 : TREE_CHAIN (new_decls
)))
2898 int problem
= decl_jump_unsafe (new_decls
);
2904 identify_goto (decl
, locus
);
2908 error (" crosses initialization of %q+#D", new_decls
);
2910 permerror (input_location
, " enters scope of %q+#D which has "
2911 "non-trivial destructor", new_decls
);
2916 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2920 identify_goto (decl
, locus
);
2923 if (b
->kind
== sk_try
)
2924 error (" enters try block");
2926 error (" enters catch block");
2929 if (b
->kind
== sk_omp
&& !saw_omp
)
2933 identify_goto (decl
, locus
);
2936 error (" enters OpenMP structured block");
2945 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2947 check_previous_goto_1 (decl
, use
->binding_level
,
2948 use
->names_in_scope
, use
->in_omp_scope
,
2949 &use
->o_goto_locus
);
2953 check_switch_goto (cp_binding_level
* level
)
2955 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2958 /* Check that a new jump to a label DECL is OK. Called by
2959 finish_goto_stmt. */
2962 check_goto (tree decl
)
2964 struct named_label_entry
*ent
, dummy
;
2965 bool saw_catch
= false, identified
= false;
2969 /* We can't know where a computed goto is jumping.
2970 So we assume that it's OK. */
2971 if (TREE_CODE (decl
) != LABEL_DECL
)
2974 /* We didn't record any information about this label when we created it,
2975 and there's not much point since it's trivial to analyze as a return. */
2976 if (decl
== cdtor_label
)
2979 dummy
.label_decl
= decl
;
2980 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2981 gcc_assert (ent
!= NULL
);
2983 /* If the label hasn't been defined yet, defer checking. */
2984 if (! DECL_INITIAL (decl
))
2986 struct named_label_use_entry
*new_use
;
2988 /* Don't bother creating another use if the last goto had the
2989 same data, and will therefore create the same set of errors. */
2991 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2994 new_use
= ggc_alloc
<named_label_use_entry
> ();
2995 new_use
->binding_level
= current_binding_level
;
2996 new_use
->names_in_scope
= current_binding_level
->names
;
2997 new_use
->o_goto_locus
= input_location
;
2998 new_use
->in_omp_scope
= false;
3000 new_use
->next
= ent
->uses
;
3001 ent
->uses
= new_use
;
3005 if (ent
->in_try_scope
|| ent
->in_catch_scope
3006 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3008 permerror (input_location
, "jump to label %q+D", decl
);
3009 permerror (input_location
, " from here");
3013 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3015 int u
= decl_jump_unsafe (bad
);
3017 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3019 /* Can't skip init of __exception_info. */
3020 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3024 error (" skips initialization of %q+#D", bad
);
3026 permerror (input_location
, " enters scope of %q+#D which has "
3027 "non-trivial destructor", bad
);
3030 if (ent
->in_try_scope
)
3031 error (" enters try block");
3032 else if (ent
->in_catch_scope
&& !saw_catch
)
3033 error (" enters catch block");
3035 if (ent
->in_omp_scope
)
3036 error (" enters OpenMP structured block");
3037 else if (flag_openmp
)
3039 cp_binding_level
*b
;
3040 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3042 if (b
== ent
->binding_level
)
3044 if (b
->kind
== sk_omp
)
3048 permerror (input_location
, "jump to label %q+D", decl
);
3049 permerror (input_location
, " from here");
3052 error (" exits OpenMP structured block");
3059 /* Check that a return is ok wrt OpenMP structured blocks.
3060 Called by finish_return_stmt. Returns true if all is well. */
3063 check_omp_return (void)
3065 cp_binding_level
*b
;
3066 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3067 if (b
->kind
== sk_omp
)
3069 error ("invalid exit from OpenMP structured block");
3072 else if (b
->kind
== sk_function_parms
)
3077 /* Define a label, specifying the location in the source file.
3078 Return the LABEL_DECL node for the label. */
3081 define_label_1 (location_t location
, tree name
)
3083 struct named_label_entry
*ent
, dummy
;
3084 cp_binding_level
*p
;
3087 decl
= lookup_label (name
);
3089 dummy
.label_decl
= decl
;
3090 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
3091 gcc_assert (ent
!= NULL
);
3093 /* After labels, make any new cleanups in the function go into their
3094 own new (temporary) binding contour. */
3095 for (p
= current_binding_level
;
3096 p
->kind
!= sk_function_parms
;
3098 p
->more_cleanups_ok
= 0;
3100 if (name
== get_identifier ("wchar_t"))
3101 permerror (input_location
, "label named wchar_t");
3103 if (DECL_INITIAL (decl
) != NULL_TREE
)
3105 error ("duplicate label %qD", decl
);
3106 return error_mark_node
;
3110 struct named_label_use_entry
*use
;
3112 /* Mark label as having been defined. */
3113 DECL_INITIAL (decl
) = error_mark_node
;
3114 /* Say where in the source. */
3115 DECL_SOURCE_LOCATION (decl
) = location
;
3117 ent
->binding_level
= current_binding_level
;
3118 ent
->names_in_scope
= current_binding_level
->names
;
3120 for (use
= ent
->uses
; use
; use
= use
->next
)
3121 check_previous_goto (decl
, use
);
3128 /* Wrapper for define_label_1. */
3131 define_label (location_t location
, tree name
)
3134 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3135 ret
= define_label_1 (location
, name
);
3136 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3143 cp_binding_level
*level
;
3144 struct cp_switch
*next
;
3145 /* The SWITCH_STMT being built. */
3147 /* A splay-tree mapping the low element of a case range to the high
3148 element, or NULL_TREE if there is no high element. Used to
3149 determine whether or not a new case label duplicates an old case
3150 label. We need a tree, rather than simply a hash table, because
3151 of the GNU case range extension. */
3155 /* A stack of the currently active switch statements. The innermost
3156 switch statement is on the top of the stack. There is no need to
3157 mark the stack for garbage collection because it is only active
3158 during the processing of the body of a function, and we never
3159 collect at that point. */
3161 static struct cp_switch
*switch_stack
;
3163 /* Called right after a switch-statement condition is parsed.
3164 SWITCH_STMT is the switch statement being parsed. */
3167 push_switch (tree switch_stmt
)
3169 struct cp_switch
*p
= XNEW (struct cp_switch
);
3170 p
->level
= current_binding_level
;
3171 p
->next
= switch_stack
;
3172 p
->switch_stmt
= switch_stmt
;
3173 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3180 struct cp_switch
*cs
= switch_stack
;
3181 location_t switch_location
;
3183 /* Emit warnings as needed. */
3184 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3185 if (!processing_template_decl
)
3186 c_do_switch_warnings (cs
->cases
, switch_location
,
3187 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3188 SWITCH_STMT_COND (cs
->switch_stmt
));
3190 splay_tree_delete (cs
->cases
);
3191 switch_stack
= switch_stack
->next
;
3195 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3196 condition. Note that if TYPE and VALUE are already integral we don't
3197 really do the conversion because the language-independent
3198 warning/optimization code will work better that way. */
3201 case_conversion (tree type
, tree value
)
3203 if (value
== NULL_TREE
)
3206 if (cxx_dialect
>= cxx11
3207 && (SCOPED_ENUM_P (type
)
3208 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3210 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3211 type
= type_promotes_to (type
);
3212 value
= (perform_implicit_conversion_flags
3213 (type
, value
, tf_warning_or_error
,
3214 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3216 return cxx_constant_value (value
);
3219 /* Note that we've seen a definition of a case label, and complain if this
3220 is a bad place for one. */
3223 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3226 cp_binding_level
*p
;
3229 if (processing_template_decl
)
3233 /* For templates, just add the case label; we'll do semantic
3234 analysis at instantiation-time. */
3235 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3236 return add_stmt (build_case_label (low_value
, high_value
, label
));
3239 /* Find the condition on which this switch statement depends. */
3240 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3241 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3242 cond
= TREE_VALUE (cond
);
3244 if (!check_switch_goto (switch_stack
->level
))
3245 return error_mark_node
;
3247 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3249 low_value
= case_conversion (type
, low_value
);
3250 high_value
= case_conversion (type
, high_value
);
3252 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3253 low_value
, high_value
);
3255 /* After labels, make any new cleanups in the function go into their
3256 own new (temporary) binding contour. */
3257 for (p
= current_binding_level
;
3258 p
->kind
!= sk_function_parms
;
3260 p
->more_cleanups_ok
= 0;
3265 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3268 typename_hash (const void* k
)
3271 const_tree
const t
= (const_tree
) k
;
3273 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3274 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3279 typedef struct typename_info
{
3287 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3288 really of type `typename_info*' */
3291 typename_compare (const void * k1
, const void * k2
)
3293 const_tree
const t1
= (const_tree
) k1
;
3294 const typename_info
*const t2
= (const typename_info
*) k2
;
3296 return (TYPE_IDENTIFIER (t1
) == t2
->name
3297 && TYPE_CONTEXT (t1
) == t2
->scope
3298 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3299 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3300 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3303 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3304 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3306 Returns the new TYPENAME_TYPE. */
3308 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3311 build_typename_type (tree context
, tree name
, tree fullname
,
3312 enum tag_types tag_type
)
3320 if (typename_htab
== NULL
)
3321 typename_htab
= htab_create_ggc (61, &typename_hash
,
3322 &typename_compare
, NULL
);
3324 ti
.scope
= FROB_CONTEXT (context
);
3326 ti
.template_id
= fullname
;
3327 ti
.enum_p
= tag_type
== enum_type
;
3328 ti
.class_p
= (tag_type
== class_type
3329 || tag_type
== record_type
3330 || tag_type
== union_type
);
3331 hash
= (htab_hash_pointer (ti
.scope
)
3332 ^ htab_hash_pointer (ti
.name
));
3334 /* See if we already have this type. */
3335 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3340 /* Build the TYPENAME_TYPE. */
3341 t
= cxx_make_type (TYPENAME_TYPE
);
3342 TYPE_CONTEXT (t
) = ti
.scope
;
3343 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3344 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3345 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3347 /* Build the corresponding TYPE_DECL. */
3348 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3349 TYPE_NAME (TREE_TYPE (d
)) = d
;
3350 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3351 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3352 DECL_ARTIFICIAL (d
) = 1;
3354 /* Store it in the hash table. */
3357 /* TYPENAME_TYPEs must always be compared structurally, because
3358 they may or may not resolve down to another type depending on
3359 the currently open classes. */
3360 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3366 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3367 provided to name the type. Returns an appropriate type, unless an
3368 error occurs, in which case error_mark_node is returned. If we
3369 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3370 return that, rather than the _TYPE it corresponds to, in other
3371 cases we look through the type decl. If TF_ERROR is set, complain
3372 about errors, otherwise be quiet. */
3375 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3376 tsubst_flags_t complain
)
3382 if (name
== error_mark_node
3383 || context
== NULL_TREE
3384 || context
== error_mark_node
)
3385 return error_mark_node
;
3389 if (!(TYPE_LANG_SPECIFIC (name
)
3390 && (CLASSTYPE_IS_TEMPLATE (name
)
3391 || CLASSTYPE_USE_TEMPLATE (name
))))
3392 name
= TYPE_IDENTIFIER (name
);
3394 /* Create a TEMPLATE_ID_EXPR for the type. */
3395 name
= build_nt (TEMPLATE_ID_EXPR
,
3396 CLASSTYPE_TI_TEMPLATE (name
),
3397 CLASSTYPE_TI_ARGS (name
));
3399 else if (TREE_CODE (name
) == TYPE_DECL
)
3400 name
= DECL_NAME (name
);
3404 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3406 name
= TREE_OPERAND (name
, 0);
3407 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3408 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3409 else if (TREE_CODE (name
) == OVERLOAD
)
3411 if (complain
& tf_error
)
3412 error ("%qD is not a type", name
);
3413 return error_mark_node
;
3416 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3418 if (complain
& tf_error
)
3419 error ("%qD used without template parameters", name
);
3420 return error_mark_node
;
3422 gcc_assert (identifier_p (name
));
3423 gcc_assert (TYPE_P (context
));
3425 if (!MAYBE_CLASS_TYPE_P (context
))
3427 if (complain
& tf_error
)
3428 error ("%q#T is not a class", context
);
3429 return error_mark_node
;
3432 /* When the CONTEXT is a dependent type, NAME could refer to a
3433 dependent base class of CONTEXT. But look inside it anyway
3434 if CONTEXT is a currently open scope, in case it refers to a
3435 member of the current instantiation or a non-dependent base;
3436 lookup will stop when we hit a dependent base. */
3437 if (!dependent_scope_p (context
))
3438 /* We should only set WANT_TYPE when we're a nested typename type.
3439 Then we can give better diagnostics if we find a non-type. */
3440 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3444 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3445 return build_typename_type (context
, name
, fullname
, tag_type
);
3447 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3451 if (complain
& tf_error
)
3452 error (want_template
? G_("no class template named %q#T in %q#T")
3453 : G_("no type named %q#T in %q#T"), name
, context
);
3454 return error_mark_node
;
3457 /* Pull out the template from an injected-class-name (or multiple). */
3459 t
= maybe_get_template_decl_from_type_decl (t
);
3461 if (TREE_CODE (t
) == TREE_LIST
)
3463 if (complain
& tf_error
)
3465 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3466 print_candidates (t
);
3468 return error_mark_node
;
3471 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3473 if (complain
& tf_error
)
3474 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3476 return error_mark_node
;
3478 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3480 if (complain
& tf_error
)
3481 error ("%<typename %T::%D%> names %q#T, which is not a type",
3483 return error_mark_node
;
3486 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3487 return error_mark_node
;
3489 /* If we are currently parsing a template and if T is a typedef accessed
3490 through CONTEXT then we need to remember and check access of T at
3491 template instantiation time. */
3492 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3495 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3497 /*entering_scope=*/0,
3498 tf_warning_or_error
| tf_user
);
3500 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3503 maybe_record_typedef_use (t
);
3508 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3509 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3510 in which case error_mark_node is returned.
3512 If PARM_LIST is non-NULL, also make sure that the template parameter
3513 list of TEMPLATE_DECL matches.
3515 If COMPLAIN zero, don't complain about any errors that occur. */
3518 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3519 tsubst_flags_t complain
)
3525 name
= TYPE_IDENTIFIER (name
);
3526 else if (DECL_P (name
))
3527 name
= DECL_NAME (name
);
3528 gcc_assert (identifier_p (name
));
3530 if (!dependent_type_p (context
)
3531 || currently_open_class (context
))
3533 tree tmpl
= NULL_TREE
;
3535 if (MAYBE_CLASS_TYPE_P (context
))
3536 tmpl
= lookup_field (context
, name
, 0, false);
3538 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3539 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3541 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3543 if (complain
& tf_error
)
3544 error ("no class template named %q#T in %q#T", name
, context
);
3545 return error_mark_node
;
3549 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3551 if (complain
& tf_error
)
3553 error ("template parameters do not match template %qD", tmpl
);
3554 inform (DECL_SOURCE_LOCATION (tmpl
),
3555 "%qD declared here", tmpl
);
3557 return error_mark_node
;
3560 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3562 return error_mark_node
;
3567 /* Build the UNBOUND_CLASS_TEMPLATE. */
3568 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3569 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3570 TREE_TYPE (t
) = NULL_TREE
;
3571 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3573 /* Build the corresponding TEMPLATE_DECL. */
3574 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3575 TYPE_NAME (TREE_TYPE (d
)) = d
;
3576 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3577 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3578 DECL_ARTIFICIAL (d
) = 1;
3579 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3586 /* Push the declarations of builtin types into the namespace.
3587 RID_INDEX is the index of the builtin type in the array
3588 RID_POINTERS. NAME is the name used when looking up the builtin
3589 type. TYPE is the _TYPE node for the builtin type. */
3592 record_builtin_type (enum rid rid_index
,
3596 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3597 tree tdecl
= NULL_TREE
;
3599 if ((int) rid_index
< (int) RID_MAX
)
3600 rname
= ridpointers
[(int) rid_index
];
3602 tname
= get_identifier (name
);
3604 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3605 eliminated. Built-in types should not be looked up name; their
3606 names are keywords that the parser can recognize. However, there
3607 is code in c-common.c that uses identifier_global_value to look
3608 up built-in types by name. */
3611 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3612 DECL_ARTIFICIAL (tdecl
) = 1;
3613 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3619 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3620 DECL_ARTIFICIAL (tdecl
) = 1;
3622 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3625 if (!TYPE_NAME (type
))
3626 TYPE_NAME (type
) = tdecl
;
3629 debug_hooks
->type_decl (tdecl
, 0);
3632 /* Record one of the standard Java types.
3633 * Declare it as having the given NAME.
3634 * If SIZE > 0, it is the size of one of the integral types;
3635 * otherwise it is the negative of the size of one of the other types. */
3638 record_builtin_java_type (const char* name
, int size
)
3643 type
= build_nonstandard_integer_type (size
, 0);
3644 type
= build_distinct_type_copy (type
);
3646 else if (size
> -32)
3649 /* "__java_char" or ""__java_boolean". */
3650 type
= build_nonstandard_integer_type (-size
, 1);
3651 type
= build_distinct_type_copy (type
);
3652 /* Get the signed type cached and attached to the unsigned type,
3653 so it doesn't get garbage-collected at "random" times,
3654 causing potential codegen differences out of different UIDs
3655 and different alias set numbers. */
3656 stype
= build_nonstandard_integer_type (-size
, 0);
3657 stype
= build_distinct_type_copy (stype
);
3658 TREE_CHAIN (type
) = stype
;
3659 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3662 { /* "__java_float" or ""__java_double". */
3663 type
= make_node (REAL_TYPE
);
3664 TYPE_PRECISION (type
) = - size
;
3667 record_builtin_type (RID_MAX
, name
, type
);
3668 decl
= TYPE_NAME (type
);
3670 /* Suppress generate debug symbol entries for these types,
3671 since for normal C++ they are just clutter.
3672 However, push_lang_context undoes this if extern "Java" is seen. */
3673 DECL_IGNORED_P (decl
) = 1;
3675 TYPE_FOR_JAVA (type
) = 1;
3679 /* Push a type into the namespace so that the back ends ignore it. */
3682 record_unknown_type (tree type
, const char* name
)
3684 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3685 TYPE_DECL
, get_identifier (name
), type
));
3686 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3687 DECL_IGNORED_P (decl
) = 1;
3688 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3689 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3690 TYPE_ALIGN (type
) = 1;
3691 TYPE_USER_ALIGN (type
) = 0;
3692 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3695 /* A string for which we should create an IDENTIFIER_NODE at
3698 typedef struct predefined_identifier
3700 /* The name of the identifier. */
3701 const char *const name
;
3702 /* The place where the IDENTIFIER_NODE should be stored. */
3704 /* Nonzero if this is the name of a constructor or destructor. */
3705 const int ctor_or_dtor_p
;
3706 } predefined_identifier
;
3708 /* Create all the predefined identifiers. */
3711 initialize_predefined_identifiers (void)
3713 const predefined_identifier
*pid
;
3715 /* A table of identifiers to create at startup. */
3716 static const predefined_identifier predefined_identifiers
[] = {
3717 { "C++", &lang_name_cplusplus
, 0 },
3718 { "C", &lang_name_c
, 0 },
3719 { "Java", &lang_name_java
, 0 },
3720 /* Some of these names have a trailing space so that it is
3721 impossible for them to conflict with names written by users. */
3722 { "__ct ", &ctor_identifier
, 1 },
3723 { "__base_ctor ", &base_ctor_identifier
, 1 },
3724 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3725 { "__dt ", &dtor_identifier
, 1 },
3726 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3727 { "__base_dtor ", &base_dtor_identifier
, 1 },
3728 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3729 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3730 { "nelts", &nelts_identifier
, 0 },
3731 { THIS_NAME
, &this_identifier
, 0 },
3732 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3733 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3734 { "_vptr", &vptr_identifier
, 0 },
3735 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3736 { "::", &global_scope_name
, 0 },
3737 { "std", &std_identifier
, 0 },
3741 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3743 *pid
->node
= get_identifier (pid
->name
);
3744 if (pid
->ctor_or_dtor_p
)
3745 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3749 /* Create the predefined scalar types of C,
3750 and some nodes representing standard constants (0, 1, (void *)0).
3751 Initialize the global binding level.
3752 Make definitions for built-in primitive functions. */
3755 cxx_init_decl_processing (void)
3758 tree void_ftype_ptr
;
3760 /* Create all the identifiers we need. */
3761 initialize_predefined_identifiers ();
3763 /* Create the global variables. */
3764 push_to_top_level ();
3766 current_function_decl
= NULL_TREE
;
3767 current_binding_level
= NULL
;
3768 /* Enter the global namespace. */
3769 gcc_assert (global_namespace
== NULL_TREE
);
3770 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3772 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3773 TREE_PUBLIC (global_namespace
) = 1;
3774 begin_scope (sk_namespace
, global_namespace
);
3776 if (flag_visibility_ms_compat
)
3777 default_visibility
= VISIBILITY_HIDDEN
;
3780 current_lang_name
= lang_name_c
;
3782 /* Create the `std' namespace. */
3783 push_namespace (std_identifier
);
3784 std_node
= current_namespace
;
3787 c_common_nodes_and_builtins ();
3789 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3790 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3791 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3792 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3793 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3794 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3795 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3796 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3798 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3800 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3801 truthvalue_type_node
= boolean_type_node
;
3802 truthvalue_false_node
= boolean_false_node
;
3803 truthvalue_true_node
= boolean_true_node
;
3805 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3806 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3807 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3810 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3813 delta_type_node
= ptrdiff_type_node
;
3814 vtable_index_type
= ptrdiff_type_node
;
3816 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3817 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3818 void_ftype_ptr
= build_function_type_list (void_type_node
,
3819 ptr_type_node
, NULL_TREE
);
3821 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3823 /* C++ extensions */
3825 unknown_type_node
= make_node (LANG_TYPE
);
3826 record_unknown_type (unknown_type_node
, "unknown type");
3828 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3829 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3831 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3833 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3834 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3836 init_list_type_node
= make_node (LANG_TYPE
);
3837 record_unknown_type (init_list_type_node
, "init list");
3840 /* Make sure we get a unique function type, so we can give
3841 its pointer type a name. (This wins for gdb.) */
3842 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3843 TREE_TYPE (vfunc_type
) = integer_type_node
;
3844 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3845 layout_type (vfunc_type
);
3847 vtable_entry_type
= build_pointer_type (vfunc_type
);
3849 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3852 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3853 layout_type (vtbl_type_node
);
3854 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3855 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3856 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3857 layout_type (vtbl_ptr_type_node
);
3858 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3860 push_namespace (get_identifier ("__cxxabiv1"));
3861 abi_node
= current_namespace
;
3864 global_type_node
= make_node (LANG_TYPE
);
3865 record_unknown_type (global_type_node
, "global type");
3868 current_lang_name
= lang_name_cplusplus
;
3871 tree newattrs
, extvisattr
;
3872 tree newtype
, deltype
;
3873 tree ptr_ftype_sizetype
;
3877 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3878 if (cxx_dialect
== cxx98
)
3881 tree bad_alloc_type_node
;
3882 tree bad_alloc_decl
;
3884 push_namespace (std_identifier
);
3885 bad_alloc_id
= get_identifier ("bad_alloc");
3886 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3887 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3889 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3890 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3894 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3897 new_eh_spec
= noexcept_false_spec
;
3899 /* Ensure attribs.c is initialized. */
3901 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3903 newattrs
= tree_cons (get_identifier ("alloc_size"),
3904 build_tree_list (NULL_TREE
, integer_one_node
),
3906 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3907 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3908 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3909 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3910 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3911 DECL_IS_MALLOC (opnew
) = 1;
3912 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3913 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3914 DECL_IS_MALLOC (opnew
) = 1;
3915 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3916 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3917 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3919 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3920 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3921 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3922 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3923 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3924 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3925 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3926 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3930 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3931 ECF_NORETURN
| ECF_NOTHROW
);
3933 /* Perform other language dependent initializations. */
3934 init_class_processing ();
3935 init_rtti_processing ();
3936 init_template_processing ();
3938 if (flag_exceptions
)
3939 init_exception_processing ();
3941 if (! supports_one_only ())
3944 make_fname_decl
= cp_make_fname_decl
;
3945 start_fname_decls ();
3947 /* Show we use EH for cleanups. */
3948 if (flag_exceptions
)
3949 using_eh_for_cleanups ();
3952 /* Generate an initializer for a function naming variable from
3953 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3954 filled in with the type of the init. */
3957 cp_fname_init (const char* name
, tree
*type_p
)
3959 tree domain
= NULL_TREE
;
3961 tree init
= NULL_TREE
;
3966 length
= strlen (name
);
3967 domain
= build_index_type (size_int (length
));
3968 init
= build_string (length
+ 1, name
);
3971 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3972 type
= build_cplus_array_type (type
, domain
);
3977 TREE_TYPE (init
) = type
;
3979 init
= error_mark_node
;
3984 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3985 the decl, LOC is the location to give the decl, NAME is the
3986 initialization string and TYPE_DEP indicates whether NAME depended
3987 on the type of the function. We make use of that to detect
3988 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3989 at the point of first use, so we mustn't push the decl now. */
3992 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3994 const char *const name
= (type_dep
&& processing_template_decl
3995 ? NULL
: fname_as_string (type_dep
));
3997 tree init
= cp_fname_init (name
, &type
);
3998 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4001 free (CONST_CAST (char *, name
));
4003 /* As we're using pushdecl_with_scope, we must set the context. */
4004 DECL_CONTEXT (decl
) = current_function_decl
;
4006 TREE_STATIC (decl
) = 1;
4007 TREE_READONLY (decl
) = 1;
4008 DECL_ARTIFICIAL (decl
) = 1;
4010 TREE_USED (decl
) = 1;
4012 if (current_function_decl
)
4014 cp_binding_level
*b
= current_binding_level
;
4015 if (b
->kind
== sk_function_parms
)
4016 return error_mark_node
;
4017 while (b
->level_chain
->kind
!= sk_function_parms
)
4019 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4020 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4021 LOOKUP_ONLYCONVERTING
);
4025 DECL_THIS_STATIC (decl
) = true;
4026 pushdecl_top_level_and_finish (decl
, init
);
4033 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4035 tree id
= DECL_NAME (decl
);
4036 const char *name
= IDENTIFIER_POINTER (id
);
4038 retrofit_lang_decl (decl
);
4040 DECL_ARTIFICIAL (decl
) = 1;
4041 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4042 SET_DECL_LANGUAGE (decl
, lang_c
);
4043 /* Runtime library routines are, by definition, available in an
4044 external shared object. */
4045 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4046 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4048 DECL_CONTEXT (decl
) = context
;
4051 pushdecl_top_level (decl
);
4055 /* A function in the user's namespace should have an explicit
4056 declaration before it is used. Mark the built-in function as
4057 anticipated but not actually declared. */
4058 if (name
[0] != '_' || name
[1] != '_')
4059 DECL_ANTICIPATED (decl
) = 1;
4060 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4062 size_t len
= strlen (name
);
4064 /* Treat __*_chk fortification functions as anticipated as well,
4065 unless they are __builtin_*. */
4066 if (len
> strlen ("___chk")
4067 && memcmp (name
+ len
- strlen ("_chk"),
4068 "_chk", strlen ("_chk") + 1) == 0)
4069 DECL_ANTICIPATED (decl
) = 1;
4076 cxx_builtin_function (tree decl
)
4078 tree id
= DECL_NAME (decl
);
4079 const char *name
= IDENTIFIER_POINTER (id
);
4080 /* All builtins that don't begin with an '_' should additionally
4081 go in the 'std' namespace. */
4084 tree decl2
= copy_node(decl
);
4085 push_namespace (std_identifier
);
4086 builtin_function_1 (decl2
, std_node
, false);
4090 return builtin_function_1 (decl
, NULL_TREE
, false);
4093 /* Like cxx_builtin_function, but guarantee the function is added to the global
4094 scope. This is to allow function specific options to add new machine
4095 dependent builtins when the target ISA changes via attribute((target(...)))
4096 which saves space on program startup if the program does not use non-generic
4100 cxx_builtin_function_ext_scope (tree decl
)
4103 tree id
= DECL_NAME (decl
);
4104 const char *name
= IDENTIFIER_POINTER (id
);
4105 /* All builtins that don't begin with an '_' should additionally
4106 go in the 'std' namespace. */
4109 tree decl2
= copy_node(decl
);
4110 push_namespace (std_identifier
);
4111 builtin_function_1 (decl2
, std_node
, true);
4115 return builtin_function_1 (decl
, NULL_TREE
, true);
4118 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4119 function. Not called directly. */
4122 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4125 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4126 DECL_EXTERNAL (fn
) = 1;
4127 TREE_PUBLIC (fn
) = 1;
4128 DECL_ARTIFICIAL (fn
) = 1;
4129 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4130 SET_DECL_LANGUAGE (fn
, lang_c
);
4131 /* Runtime library routines are, by definition, available in an
4132 external shared object. */
4133 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4134 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4135 set_call_expr_flags (fn
, ecf_flags
);
4139 /* Returns the _DECL for a library function with C++ linkage. */
4142 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4145 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4146 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4147 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4151 /* Like build_library_fn, but takes a C string instead of an
4155 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4157 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4160 /* Like build_cp_library_fn, but takes a C string instead of an
4164 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4166 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4170 /* Like build_library_fn, but also pushes the function so that we will
4171 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4172 may throw exceptions listed in RAISES. */
4175 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4180 type
= build_exception_variant (type
, raises
);
4182 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4183 pushdecl_top_level (fn
);
4187 /* Like build_cp_library_fn, but also pushes the function so that it
4188 will be found by normal lookup. */
4191 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4194 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4199 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4203 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4207 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4209 tree type
= build_function_type (void_type_node
, parmtypes
);
4210 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4213 /* Like push_library_fn, but also note that this function throws
4214 and does not return. Used for __throw_foo and the like. */
4217 push_throw_library_fn (tree name
, tree type
)
4219 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4223 /* When we call finish_struct for an anonymous union, we create
4224 default copy constructors and such. But, an anonymous union
4225 shouldn't have such things; this function undoes the damage to the
4226 anonymous union type T.
4228 (The reason that we create the synthesized methods is that we don't
4229 distinguish `union { int i; }' from `typedef union { int i; } U'.
4230 The first is an anonymous union; the second is just an ordinary
4234 fixup_anonymous_aggr (tree t
)
4238 /* Wipe out memory of synthesized methods. */
4239 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4240 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4241 TYPE_HAS_COPY_CTOR (t
) = 0;
4242 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4243 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4244 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4246 /* Splice the implicitly generated functions out of the TYPE_METHODS
4248 q
= &TYPE_METHODS (t
);
4251 if (DECL_ARTIFICIAL (*q
))
4252 *q
= TREE_CHAIN (*q
);
4254 q
= &DECL_CHAIN (*q
);
4257 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4258 if (TYPE_METHODS (t
))
4260 tree decl
= TYPE_MAIN_DECL (t
);
4262 if (TREE_CODE (t
) != UNION_TYPE
)
4263 error_at (DECL_SOURCE_LOCATION (decl
),
4264 "an anonymous struct cannot have function members");
4266 error_at (DECL_SOURCE_LOCATION (decl
),
4267 "an anonymous union cannot have function members");
4270 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4271 assignment operators (because they cannot have these methods themselves).
4272 For anonymous unions this is already checked because they are not allowed
4273 in any union, otherwise we have to check it. */
4274 if (TREE_CODE (t
) != UNION_TYPE
)
4278 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4279 if (TREE_CODE (field
) == FIELD_DECL
)
4281 type
= TREE_TYPE (field
);
4282 if (CLASS_TYPE_P (type
))
4284 if (TYPE_NEEDS_CONSTRUCTING (type
))
4285 error ("member %q+#D with constructor not allowed "
4286 "in anonymous aggregate", field
);
4287 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4288 error ("member %q+#D with destructor not allowed "
4289 "in anonymous aggregate", field
);
4290 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4291 error ("member %q+#D with copy assignment operator "
4292 "not allowed in anonymous aggregate", field
);
4298 /* Warn for an attribute located at LOCATION that appertains to the
4299 class type CLASS_TYPE that has not been properly placed after its
4300 class-key, in it class-specifier. */
4303 warn_misplaced_attr_for_class_type (source_location location
,
4306 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4308 if (warning_at (location
, OPT_Wattributes
,
4309 "attribute ignored in declaration "
4310 "of %q#T", class_type
))
4312 "attribute for %q#T must follow the %qs keyword",
4313 class_type
, class_key_or_enum_as_string (class_type
));
4316 /* Make sure that a declaration with no declarator is well-formed, i.e.
4317 just declares a tagged type or anonymous union.
4319 Returns the type declared; or NULL_TREE if none. */
4322 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4323 bool explicit_type_instantiation_p
)
4325 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4326 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4327 /* If a class, struct, or enum type is declared by the DECLSPECS
4328 (i.e, if a class-specifier, enum-specifier, or non-typename
4329 elaborated-type-specifier appears in the DECLSPECS),
4330 DECLARED_TYPE is set to the corresponding type. */
4331 tree declared_type
= NULL_TREE
;
4332 bool error_p
= false;
4334 if (declspecs
->multiple_types_p
)
4335 error ("multiple types in one declaration");
4336 else if (declspecs
->redefined_builtin_type
)
4338 if (!in_system_header_at (input_location
))
4339 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4340 "redeclaration of C++ built-in type %qT",
4341 declspecs
->redefined_builtin_type
);
4346 && TYPE_P (declspecs
->type
)
4347 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4348 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4349 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4350 declared_type
= declspecs
->type
;
4351 else if (declspecs
->type
== error_mark_node
)
4353 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4354 permerror (input_location
, "declaration does not declare anything");
4355 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4357 error ("%<auto%> can only be specified for variables "
4358 "or function declarations");
4359 return error_mark_node
;
4361 /* Check for an anonymous union. */
4362 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4363 && TYPE_ANONYMOUS_P (declared_type
))
4365 /* 7/3 In a simple-declaration, the optional init-declarator-list
4366 can be omitted only when declaring a class (clause 9) or
4367 enumeration (7.2), that is, when the decl-specifier-seq contains
4368 either a class-specifier, an elaborated-type-specifier with
4369 a class-key (9.1), or an enum-specifier. In these cases and
4370 whenever a class-specifier or enum-specifier is present in the
4371 decl-specifier-seq, the identifiers in these specifiers are among
4372 the names being declared by the declaration (as class-name,
4373 enum-names, or enumerators, depending on the syntax). In such
4374 cases, and except for the declaration of an unnamed bit-field (9.6),
4375 the decl-specifier-seq shall introduce one or more names into the
4376 program, or shall redeclare a name introduced by a previous
4377 declaration. [Example:
4378 enum { }; // ill-formed
4379 typedef class { }; // ill-formed
4383 error ("missing type-name in typedef-declaration");
4386 /* Anonymous unions are objects, so they can have specifiers. */;
4387 SET_ANON_AGGR_TYPE_P (declared_type
);
4389 if (TREE_CODE (declared_type
) != UNION_TYPE
4390 && !in_system_header_at (input_location
))
4391 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4396 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4397 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4398 error ("%qs can only be specified for functions",
4399 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4400 ? "inline" : "virtual");
4402 && (!current_class_type
4403 || current_scope () != current_class_type
))
4404 error ("%<friend%> can only be specified inside a class");
4405 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4406 error ("%<explicit%> can only be specified for constructors");
4407 else if (declspecs
->storage_class
)
4408 error ("a storage class can only be specified for objects "
4410 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4411 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4412 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4413 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4414 error ("qualifiers can only be specified for objects "
4416 else if (saw_typedef
)
4417 warning (0, "%<typedef%> was ignored in this declaration");
4418 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4419 error ("%<constexpr%> cannot be used for type declarations");
4422 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4425 if (!CLASS_TYPE_P (declared_type
)
4426 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4427 /* For a non-template class, use the name location. */
4428 loc
= location_of (declared_type
);
4430 /* For a template class (an explicit instantiation), use the
4431 current location. */
4432 loc
= input_location
;
4434 if (explicit_type_instantiation_p
)
4435 /* [dcl.attr.grammar]/4:
4437 No attribute-specifier-seq shall appertain to an explicit
4440 if (warning_at (loc
, OPT_Wattributes
,
4441 "attribute ignored in explicit instantiation %q#T",
4444 "no attribute can be applied to "
4445 "an explicit instantiation");
4448 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4451 return declared_type
;
4454 /* Called when a declaration is seen that contains no names to declare.
4455 If its type is a reference to a structure, union or enum inherited
4456 from a containing scope, shadow that tag name for the current scope
4457 with a forward reference.
4458 If its type defines a new named structure or union
4459 or defines an enum, it is valid but we need not do anything here.
4460 Otherwise, it is an error.
4462 C++: may have to grok the declspecs to learn about static,
4463 complain for anonymous unions.
4465 Returns the TYPE declared -- or NULL_TREE if none. */
4468 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4470 tree t
= check_tag_decl (declspecs
,
4471 /*explicit_type_instantiation_p=*/false);
4476 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4479 /* This is where the variables in an anonymous union are
4480 declared. An anonymous union declaration looks like:
4482 because there is no declarator after the union, the parser
4483 sends that declaration here. */
4484 if (ANON_AGGR_TYPE_P (t
))
4486 fixup_anonymous_aggr (t
);
4488 if (TYPE_FIELDS (t
))
4490 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4491 declspecs
, NORMAL
, 0, NULL
);
4492 finish_anon_union (decl
);
4499 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4502 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4503 const cp_declarator
*declarator
,
4504 bool is_template_arg
)
4508 enum decl_context context
4509 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4510 attrs
= type_specifiers
->attributes
;
4511 type_specifiers
->attributes
= NULL_TREE
;
4512 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4513 if (attrs
&& type
!= error_mark_node
)
4515 if (CLASS_TYPE_P (type
))
4516 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4517 "outside of definition", type
);
4518 else if (MAYBE_CLASS_TYPE_P (type
))
4519 /* A template type parameter or other dependent type. */
4520 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4521 "type %qT without an associated declaration", type
);
4523 cplus_decl_attributes (&type
, attrs
, 0);
4528 /* Process a DECLARATOR for a function-scope variable declaration,
4529 namespace-scope variable declaration, or function declaration.
4530 (Function definitions go through start_function; class member
4531 declarations appearing in the body of the class go through
4532 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4533 If an error occurs, the error_mark_node is returned instead.
4535 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4536 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4537 for an explicitly defaulted function, or SD_DELETED for an explicitly
4538 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4539 implicitly initialized via a default constructor. ATTRIBUTES and
4540 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4542 The scope represented by the context of the returned DECL is pushed
4543 (if it is not the global namespace) and is assigned to
4544 *PUSHED_SCOPE_P. The caller is then responsible for calling
4545 pop_scope on *PUSHED_SCOPE_P if it is set. */
4548 start_decl (const cp_declarator
*declarator
,
4549 cp_decl_specifier_seq
*declspecs
,
4552 tree prefix_attributes
,
4553 tree
*pushed_scope_p
)
4561 *pushed_scope_p
= NULL_TREE
;
4563 /* An object declared as __attribute__((deprecated)) suppresses
4564 warnings of uses of other deprecated items. */
4565 if (lookup_attribute ("deprecated", attributes
))
4566 deprecated_state
= DEPRECATED_SUPPRESS
;
4568 attributes
= chainon (attributes
, prefix_attributes
);
4570 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4573 deprecated_state
= DEPRECATED_NORMAL
;
4575 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4576 || decl
== error_mark_node
)
4577 return error_mark_node
;
4579 context
= CP_DECL_CONTEXT (decl
);
4580 if (context
!= global_namespace
)
4581 *pushed_scope_p
= push_scope (context
);
4584 /* Is it valid for this decl to have an initializer at all?
4585 If not, set INITIALIZED to zero, which will indirectly
4586 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4587 switch (TREE_CODE (decl
))
4590 error ("typedef %qD is initialized (use decltype instead)", decl
);
4591 return error_mark_node
;
4594 if (initialized
== SD_DELETED
)
4595 /* We'll handle the rest of the semantics later, but we need to
4596 set this now so it's visible to duplicate_decls. */
4597 DECL_DELETED_FN (decl
) = 1;
4606 if (! toplevel_bindings_p ()
4607 && DECL_EXTERNAL (decl
))
4608 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4610 DECL_EXTERNAL (decl
) = 0;
4611 if (toplevel_bindings_p ())
4612 TREE_STATIC (decl
) = 1;
4614 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4616 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4617 record_key_method_defined (decl
);
4619 /* If this is a typedef that names the class for linkage purposes
4620 (7.1.3p8), apply any attributes directly to the type. */
4621 if (TREE_CODE (decl
) == TYPE_DECL
4622 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4623 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4624 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4628 /* Set attributes here so if duplicate decl, will have proper attributes. */
4629 cplus_decl_attributes (&decl
, attributes
, flags
);
4631 /* Dllimported symbols cannot be defined. Static data members (which
4632 can be initialized in-class and dllimported) go through grokfield,
4633 not here, so we don't need to exclude those decls when checking for
4635 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4637 error ("definition of %q#D is marked %<dllimport%>", decl
);
4638 DECL_DLLIMPORT_P (decl
) = 0;
4641 /* If #pragma weak was used, mark the decl weak now. */
4642 if (!processing_template_decl
)
4643 maybe_apply_pragma_weak (decl
);
4645 if (TREE_CODE (decl
) == FUNCTION_DECL
4646 && DECL_DECLARED_INLINE_P (decl
)
4647 && DECL_UNINLINABLE (decl
)
4648 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4649 warning (0, "inline function %q+D given attribute noinline", decl
);
4651 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4655 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4656 if (field
== NULL_TREE
|| !VAR_P (field
))
4657 error ("%q#D is not a static member of %q#T", decl
, context
);
4660 if (DECL_CONTEXT (field
) != context
)
4662 if (!same_type_p (DECL_CONTEXT (field
), context
))
4663 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4664 "to be defined as %<%T::%D%>",
4665 DECL_CONTEXT (field
), DECL_NAME (decl
),
4666 context
, DECL_NAME (decl
));
4667 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4669 /* Static data member are tricky; an in-class initialization
4670 still doesn't provide a definition, so the in-class
4671 declaration will have DECL_EXTERNAL set, but will have an
4672 initialization. Thus, duplicate_decls won't warn
4673 about this situation, and so we check here. */
4674 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4675 error ("duplicate initialization of %qD", decl
);
4676 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4678 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4679 && !DECL_DECLARED_CONSTEXPR_P (field
))
4680 error ("%qD declared %<constexpr%> outside its class", field
);
4685 tree field
= check_classfn (context
, decl
,
4686 (processing_template_decl
4687 > template_class_depth (context
))
4688 ? current_template_parms
4690 if (field
&& field
!= error_mark_node
4691 && duplicate_decls (decl
, field
,
4692 /*newdecl_is_friend=*/false))
4696 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4697 DECL_IN_AGGR_P (decl
) = 0;
4698 /* Do not mark DECL as an explicit specialization if it was not
4699 already marked as an instantiation; a declaration should
4700 never be marked as a specialization unless we know what
4701 template is being specialized. */
4702 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4704 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4705 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4706 DECL_COMDAT (decl
) = DECL_DECLARED_INLINE_P (decl
);
4708 DECL_COMDAT (decl
) = false;
4710 /* [temp.expl.spec] An explicit specialization of a static data
4711 member of a template is a definition if the declaration
4712 includes an initializer; otherwise, it is a declaration.
4714 We check for processing_specialization so this only applies
4715 to the new specialization syntax. */
4716 if (!initialized
&& processing_specialization
)
4717 DECL_EXTERNAL (decl
) = 1;
4720 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4721 /* Aliases are definitions. */
4723 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4727 was_public
= TREE_PUBLIC (decl
);
4729 /* Enter this declaration into the symbol table. */
4730 decl
= maybe_push_decl (decl
);
4732 if (processing_template_decl
)
4733 decl
= push_template_decl (decl
);
4734 if (decl
== error_mark_node
)
4735 return error_mark_node
;
4738 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4739 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4741 /* This is a const variable with implicit 'static'. Set
4742 DECL_THIS_STATIC so we can tell it from variables that are
4743 !TREE_PUBLIC because of the anonymous namespace. */
4744 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4745 DECL_THIS_STATIC (decl
) = 1;
4748 if (!processing_template_decl
&& VAR_P (decl
))
4749 start_decl_1 (decl
, initialized
);
4754 /* Process the declaration of a variable DECL. INITIALIZED is true
4755 iff DECL is explicitly initialized. (INITIALIZED is false if the
4756 variable is initialized via an implicitly-called constructor.)
4757 This function must be called for ordinary variables (including, for
4758 example, implicit instantiations of templates), but must not be
4759 called for template declarations. */
4762 start_decl_1 (tree decl
, bool initialized
)
4766 bool aggregate_definition_p
;
4768 gcc_assert (!processing_template_decl
);
4770 if (error_operand_p (decl
))
4773 gcc_assert (VAR_P (decl
));
4775 type
= TREE_TYPE (decl
);
4776 complete_p
= COMPLETE_TYPE_P (type
);
4777 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4779 /* If an explicit initializer is present, or if this is a definition
4780 of an aggregate, then we need a complete type at this point.
4781 (Scalars are always complete types, so there is nothing to
4782 check.) This code just sets COMPLETE_P; errors (if necessary)
4783 are issued below. */
4784 if ((initialized
|| aggregate_definition_p
)
4786 && COMPLETE_TYPE_P (complete_type (type
)))
4789 /* We will not yet have set TREE_READONLY on DECL if the type
4790 was "const", but incomplete, before this point. But, now, we
4791 have a complete type, so we can try again. */
4792 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4796 /* Is it valid for this decl to have an initializer at all? */
4798 /* Don't allow initializations for incomplete types except for
4799 arrays which might be completed by the initialization. */
4801 ; /* A complete type is ok. */
4802 else if (type_uses_auto (type
))
4803 ; /* An auto type is ok. */
4804 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4806 error ("variable %q#D has initializer but incomplete type", decl
);
4807 type
= TREE_TYPE (decl
) = error_mark_node
;
4809 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4811 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4812 error ("elements of array %q#D have incomplete type", decl
);
4813 /* else we already gave an error in start_decl. */
4816 else if (aggregate_definition_p
&& !complete_p
)
4818 if (type_uses_auto (type
))
4819 error ("declaration of %q#D has no initializer", decl
);
4821 error ("aggregate %q#D has incomplete type and cannot be defined",
4823 /* Change the type so that assemble_variable will give
4824 DECL an rtl we can live with: (mem (const_int 0)). */
4825 type
= TREE_TYPE (decl
) = error_mark_node
;
4828 /* Create a new scope to hold this declaration if necessary.
4829 Whether or not a new scope is necessary cannot be determined
4830 until after the type has been completed; if the type is a
4831 specialization of a class template it is not until after
4832 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4833 will be set correctly. */
4834 maybe_push_cleanup_level (type
);
4837 /* Handle initialization of references. DECL, TYPE, and INIT have the
4838 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4839 but will be set to a new CLEANUP_STMT if a temporary is created
4840 that must be destroyed subsequently.
4842 Returns an initializer expression to use to initialize DECL, or
4843 NULL if the initialization can be performed statically.
4845 Quotes on semantics can be found in ARM 8.4.3. */
4848 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4850 if (init
== NULL_TREE
)
4852 if ((DECL_LANG_SPECIFIC (decl
) == 0
4853 || DECL_IN_AGGR_P (decl
) == 0)
4854 && ! DECL_THIS_EXTERN (decl
))
4855 error ("%qD declared as reference but not initialized", decl
);
4859 if (TREE_CODE (init
) == TREE_LIST
)
4860 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4861 tf_warning_or_error
);
4863 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4864 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4865 /* Note: default conversion is only called in very special cases. */
4866 init
= decay_conversion (init
, tf_warning_or_error
);
4868 /* Convert INIT to the reference type TYPE. This may involve the
4869 creation of a temporary, whose lifetime must be the same as that
4870 of the reference. If so, a DECL_EXPR for the temporary will be
4871 added just after the DECL_EXPR for DECL. That's why we don't set
4872 DECL_INITIAL for local references (instead assigning to them
4873 explicitly); we need to allow the temporary to be initialized
4875 return initialize_reference (type
, init
, flags
,
4876 tf_warning_or_error
);
4879 /* Designated initializers in arrays are not supported in GNU C++.
4880 The parser cannot detect this error since it does not know whether
4881 a given brace-enclosed initializer is for a class type or for an
4882 array. This function checks that CE does not use a designated
4883 initializer. If it does, an error is issued. Returns true if CE
4884 is valid, i.e., does not have a designated initializer. */
4887 check_array_designated_initializer (constructor_elt
*ce
,
4888 unsigned HOST_WIDE_INT index
)
4890 /* Designated initializers for array elements are not supported. */
4893 /* The parser only allows identifiers as designated
4895 if (ce
->index
== error_mark_node
)
4897 error ("name used in a GNU-style designated "
4898 "initializer for an array");
4901 else if (identifier_p (ce
->index
))
4903 error ("name %qD used in a GNU-style designated "
4904 "initializer for an array", ce
->index
);
4908 ce
->index
= cxx_constant_value (ce
->index
);
4910 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4912 /* A C99 designator is OK if it matches the current index. */
4913 if (wi::eq_p (ce
->index
, index
))
4916 sorry ("non-trivial designated initializers not supported");
4927 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4928 array until we finish parsing the initializer. If that's the
4929 situation we're in, update DECL accordingly. */
4932 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4934 tree type
= TREE_TYPE (decl
);
4936 if (TREE_CODE (type
) == ARRAY_TYPE
4937 && TYPE_DOMAIN (type
) == NULL_TREE
4938 && TREE_CODE (decl
) != TYPE_DECL
)
4940 /* do_default is really a C-ism to deal with tentative definitions.
4941 But let's leave it here to ease the eventual merge. */
4942 int do_default
= !DECL_EXTERNAL (decl
);
4943 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4946 /* Check that there are no designated initializers in INIT, as
4947 those are not supported in GNU C++, and as the middle-end
4948 will crash if presented with a non-numeric designated
4950 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
4952 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4953 constructor_elt
*ce
;
4955 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4956 if (!check_array_designated_initializer (ce
, i
))
4962 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4966 error ("initializer fails to determine size of %qD", decl
);
4968 else if (failure
== 2)
4972 error ("array size missing in %qD", decl
);
4974 /* If a `static' var's size isn't known, make it extern as
4975 well as static, so it does not get allocated. If it's not
4976 `static', then don't mark it extern; finish_incomplete_decl
4977 will give it a default size and it will get allocated. */
4978 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4979 DECL_EXTERNAL (decl
) = 1;
4981 else if (failure
== 3)
4983 error ("zero-size array %qD", decl
);
4987 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4989 relayout_decl (decl
);
4993 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4994 any appropriate error messages regarding the layout. */
4997 layout_var_decl (tree decl
)
5001 type
= TREE_TYPE (decl
);
5002 if (type
== error_mark_node
)
5005 /* If we haven't already laid out this declaration, do so now.
5006 Note that we must not call complete type for an external object
5007 because it's type might involve templates that we are not
5008 supposed to instantiate yet. (And it's perfectly valid to say
5009 `extern X x' for some incomplete type `X'.) */
5010 if (!DECL_EXTERNAL (decl
))
5011 complete_type (type
);
5012 if (!DECL_SIZE (decl
)
5013 && TREE_TYPE (decl
) != error_mark_node
5014 && (COMPLETE_TYPE_P (type
)
5015 || (TREE_CODE (type
) == ARRAY_TYPE
5016 && !TYPE_DOMAIN (type
)
5017 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5018 layout_decl (decl
, 0);
5020 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5022 /* An automatic variable with an incomplete type: that is an error.
5023 Don't talk about array types here, since we took care of that
5024 message in grokdeclarator. */
5025 error ("storage size of %qD isn%'t known", decl
);
5026 TREE_TYPE (decl
) = error_mark_node
;
5029 /* Keep this code around in case we later want to control debug info
5030 based on whether a type is "used". (jason 1999-11-11) */
5032 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5033 /* Let debugger know it should output info for this type. */
5034 note_debug_info_needed (ttype
);
5036 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5037 note_debug_info_needed (DECL_CONTEXT (decl
));
5040 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5041 && DECL_SIZE (decl
) != NULL_TREE
5042 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5044 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5045 constant_expression_warning (DECL_SIZE (decl
));
5048 error ("storage size of %qD isn%'t constant", decl
);
5049 TREE_TYPE (decl
) = error_mark_node
;
5054 /* If a local static variable is declared in an inline function, or if
5055 we have a weak definition, we must endeavor to create only one
5056 instance of the variable at link-time. */
5059 maybe_commonize_var (tree decl
)
5061 /* Static data in a function with comdat linkage also has comdat
5063 if (TREE_STATIC (decl
)
5064 /* Don't mess with __FUNCTION__. */
5065 && ! DECL_ARTIFICIAL (decl
)
5066 && DECL_FUNCTION_SCOPE_P (decl
)
5067 && vague_linkage_p (DECL_CONTEXT (decl
)))
5071 /* With weak symbols, we simply make the variable COMDAT;
5072 that will cause copies in multiple translations units to
5074 comdat_linkage (decl
);
5078 if (DECL_INITIAL (decl
) == NULL_TREE
5079 || DECL_INITIAL (decl
) == error_mark_node
)
5081 /* Without weak symbols, we can use COMMON to merge
5082 uninitialized variables. */
5083 TREE_PUBLIC (decl
) = 1;
5084 DECL_COMMON (decl
) = 1;
5088 /* While for initialized variables, we must use internal
5089 linkage -- which means that multiple copies will not
5091 TREE_PUBLIC (decl
) = 0;
5092 DECL_COMMON (decl
) = 0;
5093 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5094 "sorry: semantics of inline function static "
5095 "data %q#D are wrong (you%'ll wind up "
5096 "with multiple copies)", decl
))
5097 inform (DECL_SOURCE_LOCATION (decl
),
5098 "you can work around this by removing the initializer");
5104 /* Issue an error message if DECL is an uninitialized const variable. */
5107 check_for_uninitialized_const_var (tree decl
)
5109 tree type
= strip_array_types (TREE_TYPE (decl
));
5111 /* ``Unless explicitly declared extern, a const object does not have
5112 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5115 && TREE_CODE (type
) != REFERENCE_TYPE
5116 && CP_TYPE_CONST_P (type
)
5117 && !DECL_INITIAL (decl
))
5119 tree field
= default_init_uninitialized_part (type
);
5123 permerror (DECL_SOURCE_LOCATION (decl
),
5124 "uninitialized const %qD", decl
);
5126 if (CLASS_TYPE_P (type
))
5128 tree defaulted_ctor
;
5130 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5131 "%q#T has no user-provided default constructor", type
);
5132 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5134 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5135 "constructor is not user-provided because it is "
5136 "explicitly defaulted in the class body");
5137 inform (0, "and the implicitly-defined constructor does not "
5138 "initialize %q+#D", field
);
5143 /* Structure holding the current initializer being processed by reshape_init.
5144 CUR is a pointer to the current element being processed, END is a pointer
5145 after the last element present in the initializer. */
5146 typedef struct reshape_iterator_t
5148 constructor_elt
*cur
;
5149 constructor_elt
*end
;
5152 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5154 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5155 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5156 initialized. If there are no more such fields, the return value
5160 next_initializable_field (tree field
)
5163 && (TREE_CODE (field
) != FIELD_DECL
5164 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5165 || DECL_ARTIFICIAL (field
)))
5166 field
= DECL_CHAIN (field
);
5171 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5172 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5173 INTEGER_CST representing the size of the array minus one (the maximum index),
5174 or NULL_TREE if the array was declared without specifying the size. D is
5175 the iterator within the constructor. */
5178 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5179 tsubst_flags_t complain
)
5182 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5183 unsigned HOST_WIDE_INT max_index_cst
= 0;
5184 unsigned HOST_WIDE_INT index
;
5186 /* The initializer for an array is always a CONSTRUCTOR. */
5187 new_init
= build_constructor (init_list_type_node
, NULL
);
5191 /* Minus 1 is used for zero sized arrays. */
5192 if (integer_all_onesp (max_index
))
5195 if (tree_fits_uhwi_p (max_index
))
5196 max_index_cst
= tree_to_uhwi (max_index
);
5197 /* sizetype is sign extended, not zero extended. */
5199 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5202 /* Loop until there are no more initializers. */
5204 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5208 constructor_elt
*old_cur
= d
->cur
;
5210 check_array_designated_initializer (d
->cur
, index
);
5211 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5213 if (elt_init
== error_mark_node
)
5214 return error_mark_node
;
5215 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5216 size_int (index
), elt_init
);
5217 if (!TREE_CONSTANT (elt_init
))
5218 TREE_CONSTANT (new_init
) = false;
5220 /* This can happen with an invalid initializer (c++/54501). */
5221 if (d
->cur
== old_cur
&& !sized_array_p
)
5228 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5229 Parameters are the same of reshape_init_r. */
5232 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5234 tree max_index
= NULL_TREE
;
5236 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5238 if (TYPE_DOMAIN (type
))
5239 max_index
= array_type_nelts (type
);
5241 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5244 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5245 Parameters are the same of reshape_init_r. */
5248 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5250 tree max_index
= NULL_TREE
;
5252 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5254 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5256 tree value
= d
->cur
->value
;
5257 if (!same_type_p (TREE_TYPE (value
), type
))
5259 if (complain
& tf_error
)
5260 error ("invalid type %qT as initializer for a vector of type %qT",
5261 TREE_TYPE (d
->cur
->value
), type
);
5262 value
= error_mark_node
;
5268 /* For a vector, we initialize it as an array of the appropriate size. */
5269 if (TREE_CODE (type
) == VECTOR_TYPE
)
5270 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5272 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5275 /* Subroutine of reshape_init_r, processes the initializers for classes
5276 or union. Parameters are the same of reshape_init_r. */
5279 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5280 tsubst_flags_t complain
)
5285 gcc_assert (CLASS_TYPE_P (type
));
5287 /* The initializer for a class is always a CONSTRUCTOR. */
5288 new_init
= build_constructor (init_list_type_node
, NULL
);
5289 field
= next_initializable_field (TYPE_FIELDS (type
));
5295 An initializer for an aggregate member that is an
5296 empty class shall have the form of an empty
5297 initializer-list {}. */
5298 if (!first_initializer_p
)
5300 if (complain
& tf_error
)
5301 error ("initializer for %qT must be brace-enclosed", type
);
5302 return error_mark_node
;
5307 /* Loop through the initializable fields, gathering initializers. */
5308 while (d
->cur
!= d
->end
)
5311 constructor_elt
*old_cur
= d
->cur
;
5313 /* Handle designated initializers, as an extension. */
5316 if (d
->cur
->index
== error_mark_node
)
5317 return error_mark_node
;
5319 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5320 /* We already reshaped this. */
5321 gcc_assert (d
->cur
->index
== field
);
5322 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5323 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5326 if (complain
& tf_error
)
5327 error ("%<[%E] =%> used in a GNU-style designated initializer"
5328 " for class %qT", d
->cur
->index
, type
);
5329 return error_mark_node
;
5332 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5334 if (complain
& tf_error
)
5335 error ("%qT has no non-static data member named %qD", type
,
5337 return error_mark_node
;
5341 /* If we processed all the member of the class, we are done. */
5345 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5346 /*first_initializer_p=*/false, complain
);
5347 if (field_init
== error_mark_node
)
5348 return error_mark_node
;
5350 if (d
->cur
== old_cur
&& d
->cur
->index
)
5352 /* This can happen with an invalid initializer for a flexible
5353 array member (c++/54441). */
5354 if (complain
& tf_error
)
5355 error ("invalid initializer for %q#D", field
);
5356 return error_mark_node
;
5359 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5363 When a union is initialized with a brace-enclosed
5364 initializer, the braces shall only contain an
5365 initializer for the first member of the union. */
5366 if (TREE_CODE (type
) == UNION_TYPE
)
5369 field
= next_initializable_field (DECL_CHAIN (field
));
5375 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5376 designators are not valid; either complain or return true to indicate
5377 that reshape_init_r should return error_mark_node. */
5380 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5384 if (complain
& tf_error
)
5385 error ("C99 designator %qE outside aggregate initializer",
5393 /* Subroutine of reshape_init, which processes a single initializer (part of
5394 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5395 iterator within the CONSTRUCTOR which points to the initializer to process.
5396 FIRST_INITIALIZER_P is true if this is the first initializer of the
5397 outermost CONSTRUCTOR node. */
5400 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5401 tsubst_flags_t complain
)
5403 tree init
= d
->cur
->value
;
5405 if (error_operand_p (init
))
5406 return error_mark_node
;
5408 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5409 && has_designator_problem (d
, complain
))
5410 return error_mark_node
;
5412 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5414 /* A complex type can be initialized from one or two initializers,
5415 but braces are not elided. */
5417 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5419 if (CONSTRUCTOR_NELTS (init
) > 2)
5421 if (complain
& tf_error
)
5422 error ("too many initializers for %qT", type
);
5424 return error_mark_node
;
5427 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5429 vec
<constructor_elt
, va_gc
> *v
= 0;
5430 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5431 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5432 if (has_designator_problem (d
, complain
))
5433 return error_mark_node
;
5435 init
= build_constructor (init_list_type_node
, v
);
5440 /* A non-aggregate type is always initialized with a single
5442 if (!CP_AGGREGATE_TYPE_P (type
))
5444 /* It is invalid to initialize a non-aggregate type with a
5445 brace-enclosed initializer before C++0x.
5446 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5447 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5448 a CONSTRUCTOR (with a record type). */
5449 if (TREE_CODE (init
) == CONSTRUCTOR
5450 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5452 if (SCALAR_TYPE_P (type
))
5454 if (complain
& tf_error
)
5455 error ("braces around scalar initializer for type %qT", type
);
5456 init
= error_mark_node
;
5459 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5466 /* "If T is a class type and the initializer list has a single element of
5467 type cv U, where U is T or a class derived from T, the object is
5468 initialized from that element." Even if T is an aggregate. */
5469 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5470 && first_initializer_p
5471 && d
->end
- d
->cur
== 1
5472 && reference_related_p (type
, TREE_TYPE (init
)))
5480 All implicit type conversions (clause _conv_) are considered when
5481 initializing the aggregate member with an initializer from an
5482 initializer-list. If the initializer can initialize a member,
5483 the member is initialized. Otherwise, if the member is itself a
5484 non-empty subaggregate, brace elision is assumed and the
5485 initializer is considered for the initialization of the first
5486 member of the subaggregate. */
5487 if (TREE_CODE (init
) != CONSTRUCTOR
5488 /* But don't try this for the first initializer, since that would be
5489 looking through the outermost braces; A a2 = { a1 }; is not a
5490 valid aggregate initialization. */
5491 && !first_initializer_p
5492 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5493 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5500 /* [dcl.init.string]
5502 A char array (whether plain char, signed char, or unsigned char)
5503 can be initialized by a string-literal (optionally enclosed in
5504 braces); a wchar_t array can be initialized by a wide
5505 string-literal (optionally enclosed in braces). */
5506 if (TREE_CODE (type
) == ARRAY_TYPE
5507 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5509 tree str_init
= init
;
5511 /* Strip one level of braces if and only if they enclose a single
5512 element (as allowed by [dcl.init.string]). */
5513 if (!first_initializer_p
5514 && TREE_CODE (str_init
) == CONSTRUCTOR
5515 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5517 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5520 /* If it's a string literal, then it's the initializer for the array
5521 as a whole. Otherwise, continue with normal initialization for
5522 array types (one value per array element). */
5523 if (TREE_CODE (str_init
) == STRING_CST
)
5525 if (has_designator_problem (d
, complain
))
5526 return error_mark_node
;
5532 /* The following cases are about aggregates. If we are not within a full
5533 initializer already, and there is not a CONSTRUCTOR, it means that there
5534 is a missing set of braces (that is, we are processing the case for
5535 which reshape_init exists). */
5536 if (!first_initializer_p
)
5538 if (TREE_CODE (init
) == CONSTRUCTOR
)
5540 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5541 /* There is no need to reshape pointer-to-member function
5542 initializers, as they are always constructed correctly
5543 by the front end. */
5545 else if (COMPOUND_LITERAL_P (init
))
5546 /* For a nested compound literal, there is no need to reshape since
5547 brace elision is not allowed. Even if we decided to allow it,
5548 we should add a call to reshape_init in finish_compound_literal,
5549 before calling digest_init, so changing this code would still
5550 not be necessary. */
5551 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5555 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5556 return reshape_init (type
, init
, complain
);
5560 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5564 /* Dispatch to specialized routines. */
5565 if (CLASS_TYPE_P (type
))
5566 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5567 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5568 return reshape_init_array (type
, d
, complain
);
5569 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5570 return reshape_init_vector (type
, d
, complain
);
5575 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5576 brace-enclosed aggregate initializer.
5578 INIT is the CONSTRUCTOR containing the list of initializers describing
5579 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5580 It may not presently match the shape of the TYPE; for example:
5582 struct S { int a; int b; };
5583 struct S a[] = { 1, 2, 3, 4 };
5585 Here INIT will hold a vector of four elements, rather than a
5586 vector of two elements, each itself a vector of two elements. This
5587 routine transforms INIT from the former form into the latter. The
5588 revised CONSTRUCTOR node is returned. */
5591 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5593 vec
<constructor_elt
, va_gc
> *v
;
5597 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5599 v
= CONSTRUCTOR_ELTS (init
);
5601 /* An empty constructor does not need reshaping, and it is always a valid
5603 if (vec_safe_is_empty (v
))
5606 /* Recurse on this CONSTRUCTOR. */
5608 d
.end
= d
.cur
+ v
->length ();
5610 new_init
= reshape_init_r (type
, &d
, true, complain
);
5611 if (new_init
== error_mark_node
)
5612 return error_mark_node
;
5614 /* Make sure all the element of the constructor were used. Otherwise,
5615 issue an error about exceeding initializers. */
5618 if (complain
& tf_error
)
5619 error ("too many initializers for %qT", type
);
5621 return error_mark_node
;
5627 /* Verify array initializer. Returns true if errors have been reported. */
5630 check_array_initializer (tree decl
, tree type
, tree init
)
5632 tree element_type
= TREE_TYPE (type
);
5634 /* The array type itself need not be complete, because the
5635 initializer may tell us how many elements are in the array.
5636 But, the elements of the array must be complete. */
5637 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5640 error ("elements of array %q#D have incomplete type", decl
);
5642 error ("elements of array %q#T have incomplete type", type
);
5645 /* A compound literal can't have variable size. */
5647 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5648 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5650 error ("variable-sized compound literal");
5656 /* Subroutine of check_initializer; args are passed down from that function.
5657 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5660 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5663 gcc_assert (stmts_are_full_exprs_p ());
5664 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5667 /* Verify INIT (the initializer for DECL), and record the
5668 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5669 grok_reference_init.
5671 If the return value is non-NULL, it is an expression that must be
5672 evaluated dynamically to initialize DECL. */
5675 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5677 tree type
= TREE_TYPE (decl
);
5678 tree init_code
= NULL
;
5681 /* Things that are going to be initialized need to have complete
5683 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5685 if (DECL_HAS_VALUE_EXPR_P (decl
))
5687 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5688 it doesn't have storage to be initialized. */
5689 gcc_assert (init
== NULL_TREE
);
5693 if (type
== error_mark_node
)
5694 /* We will have already complained. */
5697 if (TREE_CODE (type
) == ARRAY_TYPE
)
5699 if (check_array_initializer (decl
, type
, init
))
5702 else if (!COMPLETE_TYPE_P (type
))
5704 error ("%q#D has incomplete type", decl
);
5705 TREE_TYPE (decl
) = error_mark_node
;
5709 /* There is no way to make a variable-sized class type in GNU C++. */
5710 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5712 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5714 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5715 if (SCALAR_TYPE_P (type
))
5719 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5720 init
= build_zero_init (type
, NULL_TREE
, false);
5722 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5724 error ("scalar object %qD requires one element in initializer",
5726 TREE_TYPE (decl
) = error_mark_node
;
5732 if (TREE_CODE (decl
) == CONST_DECL
)
5734 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5736 DECL_INITIAL (decl
) = init
;
5738 gcc_assert (init
!= NULL_TREE
);
5741 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5743 else if (init
|| type_build_ctor_call (type
)
5744 || TREE_CODE (type
) == REFERENCE_TYPE
)
5746 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5748 init
= grok_reference_init (decl
, type
, init
, flags
);
5749 flags
|= LOOKUP_ALREADY_DIGESTED
;
5752 check_for_uninitialized_const_var (decl
);
5753 /* Do not reshape constructors of vectors (they don't need to be
5755 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5757 if (is_std_init_list (type
))
5759 init
= perform_implicit_conversion (type
, init
,
5760 tf_warning_or_error
);
5761 flags
|= LOOKUP_ALREADY_DIGESTED
;
5763 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5765 /* Don't reshape if the class has constructors. */
5766 if (cxx_dialect
== cxx98
)
5767 error ("in C++98 %qD must be initialized by constructor, "
5771 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5773 error ("opaque vector types cannot be initialized");
5774 init
= error_mark_node
;
5778 init
= reshape_init (type
, init
, tf_warning_or_error
);
5779 flags
|= LOOKUP_NO_NARROWING
;
5782 else if (TREE_CODE (init
) == TREE_LIST
5783 && TREE_TYPE (init
) != unknown_type_node
5784 && !MAYBE_CLASS_TYPE_P (type
))
5786 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5788 /* We get here with code like `int a (2);' */
5789 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5790 tf_warning_or_error
);
5793 /* If DECL has an array type without a specific bound, deduce the
5794 array size from the initializer. */
5795 maybe_deduce_size_from_array_init (decl
, init
);
5796 type
= TREE_TYPE (decl
);
5797 if (type
== error_mark_node
)
5800 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5801 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5802 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5803 && CP_AGGREGATE_TYPE_P (type
)
5804 && (CLASS_TYPE_P (type
)
5805 || !TYPE_NEEDS_CONSTRUCTING (type
)
5806 || type_has_extended_temps (type
))))
5808 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5810 /* A constructor call is a non-trivial initializer even if
5811 it isn't explicitly written. */
5812 if (TREE_SIDE_EFFECTS (init_code
))
5813 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5815 /* If this is a constexpr initializer, expand_default_init will
5816 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5817 case, pull the initializer back out and pass it down into
5818 store_init_value. */
5819 while (TREE_CODE (init_code
) == EXPR_STMT
5820 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5821 init_code
= TREE_OPERAND (init_code
, 0);
5822 if (TREE_CODE (init_code
) == INIT_EXPR
)
5824 init
= TREE_OPERAND (init_code
, 1);
5825 init_code
= NULL_TREE
;
5826 /* Don't call digest_init; it's unnecessary and will complain
5827 about aggregate initialization of non-aggregate classes. */
5828 flags
|= LOOKUP_ALREADY_DIGESTED
;
5830 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5832 /* Declared constexpr, but no suitable initializer; massage
5833 init appropriately so we can pass it into store_init_value
5835 if (CLASS_TYPE_P (type
)
5836 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5838 init
= build_functional_cast (type
, init
, tf_none
);
5839 if (TREE_CODE (init
) == TARGET_EXPR
)
5840 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5842 init_code
= NULL_TREE
;
5848 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5850 /* In aggregate initialization of a variable, each element
5851 initialization is a full-expression because there is no
5852 enclosing expression. */
5853 gcc_assert (stmts_are_full_exprs_p ());
5855 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5857 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5858 && DECL_INITIAL (decl
)
5859 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5860 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5861 warning (0, "array %qD initialized by parenthesized string literal %qE",
5862 decl
, DECL_INITIAL (decl
));
5868 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5869 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5870 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5871 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5874 check_for_uninitialized_const_var (decl
);
5877 if (init
&& init
!= error_mark_node
)
5878 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5882 /* We might have set these in cp_finish_decl. */
5883 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
5884 TREE_CONSTANT (decl
) = false;
5887 if (init_code
&& DECL_IN_AGGR_P (decl
))
5889 static int explained
= 0;
5891 if (cxx_dialect
< cxx11
)
5892 error ("initializer invalid for static member with constructor");
5894 error ("non-constant in-class initialization invalid for static "
5895 "member %qD", decl
);
5898 inform (input_location
,
5899 "(an out of class initialization is required)");
5908 /* If DECL is not a local variable, give it RTL. */
5911 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5913 int toplev
= toplevel_bindings_p ();
5915 const char *filename
;
5917 /* Set the DECL_ASSEMBLER_NAME for the object. */
5920 /* The `register' keyword, when used together with an
5921 asm-specification, indicates that the variable should be
5922 placed in a particular register. */
5923 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5925 set_user_assembler_name (decl
, asmspec
);
5926 DECL_HARD_REGISTER (decl
) = 1;
5930 if (TREE_CODE (decl
) == FUNCTION_DECL
5931 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5932 set_builtin_user_assembler_name (decl
, asmspec
);
5933 set_user_assembler_name (decl
, asmspec
);
5937 /* Handle non-variables up front. */
5940 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5944 /* If we see a class member here, it should be a static data
5946 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5948 gcc_assert (TREE_STATIC (decl
));
5949 /* An in-class declaration of a static data member should be
5950 external; it is only a declaration, and not a definition. */
5951 if (init
== NULL_TREE
)
5952 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5955 /* We don't create any RTL for local variables. */
5956 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5959 /* We defer emission of local statics until the corresponding
5960 DECL_EXPR is expanded. */
5961 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5963 /* We try to defer namespace-scope static constants so that they are
5964 not emitted into the object file unnecessarily. */
5965 filename
= LOCATION_FILE (input_location
);
5966 if (!DECL_VIRTUAL_P (decl
)
5967 && TREE_READONLY (decl
)
5968 && DECL_INITIAL (decl
) != NULL_TREE
5969 && DECL_INITIAL (decl
) != error_mark_node
5971 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5973 && !TREE_PUBLIC (decl
))
5975 /* Fool with the linkage of static consts according to #pragma
5977 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5978 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5980 TREE_PUBLIC (decl
) = 1;
5981 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5986 /* Likewise for template instantiations. */
5987 else if (DECL_LANG_SPECIFIC (decl
)
5988 && DECL_IMPLICIT_INSTANTIATION (decl
))
5991 /* If we're not deferring, go ahead and assemble the variable. */
5993 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5996 /* walk_tree helper for wrap_temporary_cleanups, below. */
5999 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6001 /* Stop at types or full-expression boundaries. */
6002 if (TYPE_P (*stmt_p
)
6003 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6009 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6011 tree guard
= (tree
)data
;
6012 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6014 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6015 /* Tell honor_protect_cleanup_actions to handle this as a separate
6017 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6019 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6025 /* We're initializing a local variable which has a cleanup GUARD. If there
6026 are any temporaries used in the initializer INIT of this variable, we
6027 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6028 variable will be cleaned up properly if one of them throws.
6030 Unfortunately, there's no way to express this properly in terms of
6031 nesting, as the regions for the temporaries overlap the region for the
6032 variable itself; if there are two temporaries, the variable needs to be
6033 the first thing destroyed if either of them throws. However, we only
6034 want to run the variable's cleanup if it actually got constructed. So
6035 we need to guard the temporary cleanups with the variable's cleanup if
6036 they are run on the normal path, but not if they are run on the
6037 exceptional path. We implement this by telling
6038 honor_protect_cleanup_actions to strip the variable cleanup from the
6039 exceptional path. */
6042 wrap_temporary_cleanups (tree init
, tree guard
)
6044 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6047 /* Generate code to initialize DECL (a local variable). */
6050 initialize_local_var (tree decl
, tree init
)
6052 tree type
= TREE_TYPE (decl
);
6056 gcc_assert (VAR_P (decl
)
6057 || TREE_CODE (decl
) == RESULT_DECL
);
6058 gcc_assert (!TREE_STATIC (decl
));
6060 if (DECL_SIZE (decl
) == NULL_TREE
)
6062 /* If we used it already as memory, it must stay in memory. */
6063 DECL_INITIAL (decl
) = NULL_TREE
;
6064 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6068 if (type
== error_mark_node
)
6071 /* Compute and store the initial value. */
6072 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6073 if (TREE_USED (type
))
6074 DECL_READ_P (decl
) = 1;
6076 /* Generate a cleanup, if necessary. */
6077 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6079 /* Perform the initialization. */
6082 if (TREE_CODE (init
) == INIT_EXPR
6083 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
6085 /* Stick simple initializers in DECL_INITIAL so that
6086 -Wno-init-self works (c++/34772). */
6087 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6088 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
6092 int saved_stmts_are_full_exprs_p
;
6094 /* If we're only initializing a single object, guard the
6095 destructors of any temporaries used in its initializer with
6096 its destructor. This isn't right for arrays because each
6097 element initialization is a full-expression. */
6098 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6099 wrap_temporary_cleanups (init
, cleanup
);
6101 gcc_assert (building_stmt_list_p ());
6102 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6103 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6104 finish_expr_stmt (init
);
6105 current_stmt_tree ()->stmts_are_full_exprs_p
=
6106 saved_stmts_are_full_exprs_p
;
6110 /* Set this to 0 so we can tell whether an aggregate which was
6111 initialized was ever used. Don't do this if it has a
6112 destructor, so we don't complain about the 'resource
6113 allocation is initialization' idiom. Now set
6114 attribute((unused)) on types so decls of that type will be
6115 marked used. (see TREE_USED, above.) */
6116 if (TYPE_NEEDS_CONSTRUCTING (type
)
6118 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6119 && DECL_NAME (decl
))
6120 TREE_USED (decl
) = 0;
6121 else if (already_used
)
6122 TREE_USED (decl
) = 1;
6125 finish_decl_cleanup (decl
, cleanup
);
6128 /* DECL is a VAR_DECL for a compiler-generated variable with static
6129 storage duration (like a virtual table) whose initializer is a
6130 compile-time constant. Initialize the variable and provide it to the
6134 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6137 gcc_assert (DECL_ARTIFICIAL (decl
));
6138 init
= build_constructor (TREE_TYPE (decl
), v
);
6139 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6140 DECL_INITIAL (decl
) = init
;
6141 DECL_INITIALIZED_P (decl
) = 1;
6142 determine_visibility (decl
);
6143 layout_var_decl (decl
);
6144 maybe_commonize_var (decl
);
6145 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6148 /* INIT is the initializer for a variable, as represented by the
6149 parser. Returns true iff INIT is type-dependent. */
6152 type_dependent_init_p (tree init
)
6154 if (TREE_CODE (init
) == TREE_LIST
)
6155 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6156 return any_type_dependent_elements_p (init
);
6157 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6158 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6160 vec
<constructor_elt
, va_gc
> *elts
;
6164 elts
= CONSTRUCTOR_ELTS (init
);
6165 nelts
= vec_safe_length (elts
);
6166 for (i
= 0; i
< nelts
; ++i
)
6167 if (type_dependent_init_p ((*elts
)[i
].value
))
6171 /* It must be a simple expression, e.g., int i = 3; */
6172 return type_dependent_expression_p (init
);
6177 /* INIT is the initializer for a variable, as represented by the
6178 parser. Returns true iff INIT is value-dependent. */
6181 value_dependent_init_p (tree init
)
6183 if (TREE_CODE (init
) == TREE_LIST
)
6184 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6185 return any_value_dependent_elements_p (init
);
6186 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6187 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6189 vec
<constructor_elt
, va_gc
> *elts
;
6193 elts
= CONSTRUCTOR_ELTS (init
);
6194 nelts
= vec_safe_length (elts
);
6195 for (i
= 0; i
< nelts
; ++i
)
6196 if (value_dependent_init_p ((*elts
)[i
].value
))
6200 /* It must be a simple expression, e.g., int i = 3; */
6201 return value_dependent_expression_p (init
);
6206 /* Finish processing of a declaration;
6207 install its line number and initial value.
6208 If the length of an array type is not known before,
6209 it must be determined now, from the initial value, or it is an error.
6211 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6212 true, then INIT is an integral constant expression.
6214 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6215 if the (init) syntax was used. */
6218 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6219 tree asmspec_tree
, int flags
)
6222 vec
<tree
, va_gc
> *cleanups
= NULL
;
6223 const char *asmspec
= NULL
;
6224 int was_readonly
= 0;
6225 bool var_definition_p
= false;
6228 if (decl
== error_mark_node
)
6233 error ("assignment (not initialization) in declaration");
6237 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6238 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6239 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6241 type
= TREE_TYPE (decl
);
6242 if (type
== error_mark_node
)
6245 /* If a name was specified, get the string. */
6246 if (at_namespace_scope_p ())
6247 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6248 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6249 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6251 if (current_class_type
6252 && CP_DECL_CONTEXT (decl
) == current_class_type
6253 && TYPE_BEING_DEFINED (current_class_type
)
6254 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6255 && (DECL_INITIAL (decl
) || init
))
6256 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6258 if (TREE_CODE (decl
) != FUNCTION_DECL
6259 && (auto_node
= type_uses_auto (type
)))
6262 if (init
== NULL_TREE
)
6264 if (DECL_LANG_SPECIFIC (decl
)
6265 && DECL_TEMPLATE_INSTANTIATION (decl
)
6266 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6268 /* init is null because we're deferring instantiating the
6269 initializer until we need it. Well, we need it now. */
6270 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6274 error ("declaration of %q#D has no initializer", decl
);
6275 TREE_TYPE (decl
) = error_mark_node
;
6279 if (TREE_CODE (d_init
) == TREE_LIST
)
6280 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6281 tf_warning_or_error
);
6282 d_init
= resolve_nondeduced_context (d_init
);
6283 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6285 if (type
== error_mark_node
)
6287 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6290 if (!ensure_literal_type_for_constexpr_object (decl
))
6291 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6294 && DECL_CLASS_SCOPE_P (decl
)
6295 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6296 check_static_variable_definition (decl
, type
);
6298 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6301 if (init
== ridpointers
[(int)RID_DELETE
])
6303 /* FIXME check this is 1st decl. */
6304 DECL_DELETED_FN (decl
) = 1;
6305 DECL_DECLARED_INLINE_P (decl
) = 1;
6306 DECL_INITIAL (decl
) = error_mark_node
;
6307 FOR_EACH_CLONE (clone
, decl
)
6309 DECL_DELETED_FN (clone
) = 1;
6310 DECL_DECLARED_INLINE_P (clone
) = 1;
6311 DECL_INITIAL (clone
) = error_mark_node
;
6315 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6317 if (defaultable_fn_check (decl
))
6318 DECL_DEFAULTED_FN (decl
) = 1;
6320 DECL_INITIAL (decl
) = NULL_TREE
;
6324 if (init
&& VAR_P (decl
))
6326 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6327 /* If DECL is a reference, then we want to know whether init is a
6328 reference constant; init_const_expr_p as passed tells us whether
6329 it's an rvalue constant. */
6330 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6331 init_const_expr_p
= potential_constant_expression (init
);
6332 if (init_const_expr_p
)
6334 /* Set these flags now for templates. We'll update the flags in
6335 store_init_value for instantiations. */
6336 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6337 if (decl_maybe_constant_var_p (decl
))
6338 TREE_CONSTANT (decl
) = 1;
6342 if (processing_template_decl
)
6344 bool type_dependent_p
;
6346 /* Add this declaration to the statement-tree. */
6347 if (at_function_scope_p ())
6348 add_decl_expr (decl
);
6350 type_dependent_p
= dependent_type_p (type
);
6352 if (check_for_bare_parameter_packs (init
))
6355 DECL_INITIAL (decl
) = NULL_TREE
;
6358 /* Generally, initializers in templates are expanded when the
6359 template is instantiated. But, if DECL is a variable constant
6360 then it can be used in future constant expressions, so its value
6361 must be available. */
6363 if (!VAR_P (decl
) || dependent_type_p (type
))
6364 /* We can't do anything if the decl has dependent type. */;
6366 && init_const_expr_p
6367 && !type_dependent_p
6368 && decl_maybe_constant_var_p (decl
)
6369 && !type_dependent_init_p (init
)
6370 && !value_dependent_init_p (init
))
6372 /* This variable seems to be a non-dependent constant, so process
6373 its initializer. If check_initializer returns non-null the
6374 initialization wasn't constant after all. */
6376 cleanups
= make_tree_vector ();
6377 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6378 if (init_code
== NULL_TREE
)
6380 release_tree_vector (cleanups
);
6382 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6384 /* Deduce array size even if the initializer is dependent. */
6385 maybe_deduce_size_from_array_init (decl
, init
);
6386 /* And complain about multiple initializers. */
6387 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6388 && !MAYBE_CLASS_TYPE_P (type
))
6389 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6390 tf_warning_or_error
);
6394 DECL_INITIAL (decl
) = init
;
6398 /* Just store non-static data member initializers for later. */
6399 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6400 DECL_INITIAL (decl
) = init
;
6402 /* Take care of TYPE_DECLs up front. */
6403 if (TREE_CODE (decl
) == TYPE_DECL
)
6405 if (type
!= error_mark_node
6406 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6408 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6409 warning (0, "shadowing previous type declaration of %q#D", decl
);
6410 set_identifier_type_value (DECL_NAME (decl
), decl
);
6413 /* If we have installed this as the canonical typedef for this
6414 type, and that type has not been defined yet, delay emitting
6415 the debug information for it, as we will emit it later. */
6416 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6417 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6418 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6420 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6425 /* A reference will be modified here, as it is initialized. */
6426 if (! DECL_EXTERNAL (decl
)
6427 && TREE_READONLY (decl
)
6428 && TREE_CODE (type
) == REFERENCE_TYPE
)
6431 TREE_READONLY (decl
) = 0;
6436 /* If this is a local variable that will need a mangled name,
6437 register it now. We must do this before processing the
6438 initializer for the variable, since the initialization might
6439 require a guard variable, and since the mangled name of the
6440 guard variable will depend on the mangled name of this
6442 if (DECL_FUNCTION_SCOPE_P (decl
)
6443 && TREE_STATIC (decl
)
6444 && !DECL_ARTIFICIAL (decl
))
6446 push_local_name (decl
);
6447 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6448 || DECL_DESTRUCTOR_P (current_function_decl
))
6449 /* Normally local_decls is populated during GIMPLE lowering,
6450 but [cd]tors are never actually compiled directly. We need
6451 to put statics on the list so we can deal with the label
6452 address extension. FIXME. */
6453 add_local_decl (cfun
, decl
);
6456 /* Convert the initializer to the type of DECL, if we have not
6457 already initialized DECL. */
6458 if (!DECL_INITIALIZED_P (decl
)
6459 /* If !DECL_EXTERNAL then DECL is being defined. In the
6460 case of a static data member initialized inside the
6461 class-specifier, there can be an initializer even if DECL
6462 is *not* defined. */
6463 && (!DECL_EXTERNAL (decl
) || init
))
6465 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6468 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6469 /* Allow libjava/prims.cc define primitive classes. */
6470 if (init
!= NULL_TREE
6471 || jclass
== NULL_TREE
6472 || TREE_CODE (jclass
) != TYPE_DECL
6473 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6474 || !same_type_ignoring_top_level_qualifiers_p
6475 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6476 error ("Java object %qD not allocated with %<new%>", decl
);
6479 cleanups
= make_tree_vector ();
6480 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6486 The memory occupied by any object of static storage
6487 duration is zero-initialized at program startup before
6488 any other initialization takes place.
6490 We cannot create an appropriate initializer until after
6491 the type of DECL is finalized. If DECL_INITIAL is set,
6492 then the DECL is statically initialized, and any
6493 necessary zero-initialization has already been performed. */
6494 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6495 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6496 /*nelts=*/NULL_TREE
,
6497 /*static_storage_p=*/true);
6498 /* Remember that the initialization for this variable has
6500 DECL_INITIALIZED_P (decl
) = 1;
6501 /* This declaration is the definition of this variable,
6502 unless we are initializing a static data member within
6503 the class specifier. */
6504 if (!DECL_EXTERNAL (decl
))
6505 var_definition_p
= true;
6507 /* If the variable has an array type, lay out the type, even if
6508 there is no initializer. It is valid to index through the
6509 array, and we must get TYPE_ALIGN set correctly on the array
6511 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6514 if (TREE_STATIC (decl
)
6515 && !at_function_scope_p ()
6516 && current_function_decl
== NULL
)
6517 /* So decl is a global variable or a static member of a
6518 non local class. Record the types it uses
6519 so that we can decide later to emit debug info for them. */
6520 record_types_used_by_current_var_decl (decl
);
6522 else if (TREE_CODE (decl
) == FIELD_DECL
6523 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6524 error ("non-static data member %qD has Java class type", decl
);
6526 /* Add this declaration to the statement-tree. This needs to happen
6527 after the call to check_initializer so that the DECL_EXPR for a
6528 reference temp is added before the DECL_EXPR for the reference itself. */
6529 if (DECL_FUNCTION_SCOPE_P (decl
))
6531 /* If we're building a variable sized type, and we might be
6532 reachable other than via the top of the current binding
6533 level, then create a new BIND_EXPR so that we deallocate
6534 the object at the right time. */
6537 && !TREE_CONSTANT (DECL_SIZE (decl
))
6538 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6541 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6542 TREE_SIDE_EFFECTS (bind
) = 1;
6544 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6546 add_decl_expr (decl
);
6549 /* Let the middle end know about variables and functions -- but not
6550 static data members in uninstantiated class templates. */
6551 if (VAR_OR_FUNCTION_DECL_P (decl
))
6555 layout_var_decl (decl
);
6556 maybe_commonize_var (decl
);
6559 /* This needs to happen after the linkage is set. */
6560 determine_visibility (decl
);
6562 if (var_definition_p
&& TREE_STATIC (decl
))
6564 /* If a TREE_READONLY variable needs initialization
6565 at runtime, it is no longer readonly and we need to
6566 avoid MEM_READONLY_P being set on RTL created for it. */
6569 if (TREE_READONLY (decl
))
6570 TREE_READONLY (decl
) = 0;
6573 else if (was_readonly
)
6574 TREE_READONLY (decl
) = 1;
6576 /* Likewise if it needs destruction. */
6577 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6578 TREE_READONLY (decl
) = 0;
6581 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6583 /* Check for abstractness of the type. Notice that there is no
6584 need to strip array types here since the check for those types
6585 is already done within create_array_type_for_decl. */
6586 abstract_virtuals_error (decl
, type
);
6588 if (TREE_TYPE (decl
) == error_mark_node
)
6589 /* No initialization required. */
6591 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6595 if (init
== ridpointers
[(int)RID_DEFAULT
])
6597 /* An out-of-class default definition is defined at
6598 the point where it is explicitly defaulted. */
6599 if (DECL_DELETED_FN (decl
))
6600 maybe_explain_implicit_delete (decl
);
6601 else if (DECL_INITIAL (decl
) == error_mark_node
)
6602 synthesize_method (decl
);
6605 error ("function %q#D is initialized like a variable", decl
);
6607 /* else no initialization required. */
6609 else if (DECL_EXTERNAL (decl
)
6610 && ! (DECL_LANG_SPECIFIC (decl
)
6611 && DECL_NOT_REALLY_EXTERN (decl
)))
6614 DECL_INITIAL (decl
) = init
;
6616 /* A variable definition. */
6617 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6618 /* Initialize the local variable. */
6619 initialize_local_var (decl
, init
);
6621 /* If a variable is defined, and then a subsequent
6622 definition with external linkage is encountered, we will
6623 get here twice for the same variable. We want to avoid
6624 calling expand_static_init more than once. For variables
6625 that are not static data members, we can call
6626 expand_static_init only when we actually process the
6627 initializer. It is not legal to redeclare a static data
6628 member, so this issue does not arise in that case. */
6629 else if (var_definition_p
&& TREE_STATIC (decl
))
6630 expand_static_init (decl
, init
);
6633 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6634 reference, insert it in the statement-tree now. */
6638 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6639 push_cleanup (decl
, t
, false);
6640 release_tree_vector (cleanups
);
6644 TREE_READONLY (decl
) = 1;
6646 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6649 /* Returns a declaration for a VAR_DECL as if:
6651 extern "C" TYPE NAME;
6653 had been seen. Used to create compiler-generated global
6657 declare_global_var (tree name
, tree type
)
6661 push_to_top_level ();
6662 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6663 TREE_PUBLIC (decl
) = 1;
6664 DECL_EXTERNAL (decl
) = 1;
6665 DECL_ARTIFICIAL (decl
) = 1;
6666 /* If the user has explicitly declared this variable (perhaps
6667 because the code we are compiling is part of a low-level runtime
6668 library), then it is possible that our declaration will be merged
6669 with theirs by pushdecl. */
6670 decl
= pushdecl (decl
);
6671 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6672 pop_from_top_level ();
6677 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6678 if "__cxa_atexit" is not being used) corresponding to the function
6679 to be called when the program exits. */
6682 get_atexit_fn_ptr_type (void)
6686 if (!atexit_fn_ptr_type_node
)
6689 if (flag_use_cxa_atexit
6690 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6691 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6692 arg_type
= ptr_type_node
;
6694 /* The parameter to "atexit" is "void (*)(void)". */
6695 arg_type
= NULL_TREE
;
6697 fn_type
= build_function_type_list (void_type_node
,
6698 arg_type
, NULL_TREE
);
6699 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6702 return atexit_fn_ptr_type_node
;
6705 /* Returns a pointer to the `atexit' function. Note that if
6706 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6707 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6710 get_atexit_node (void)
6716 bool use_aeabi_atexit
;
6721 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6723 /* The declaration for `__cxa_atexit' is:
6725 int __cxa_atexit (void (*)(void *), void *, void *)
6727 We build up the argument types and then the function type
6729 tree argtype0
, argtype1
, argtype2
;
6731 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6732 /* First, build the pointer-to-function type for the first
6734 fn_ptr_type
= get_atexit_fn_ptr_type ();
6735 /* Then, build the rest of the argument types. */
6736 argtype2
= ptr_type_node
;
6737 if (use_aeabi_atexit
)
6739 argtype1
= fn_ptr_type
;
6740 argtype0
= ptr_type_node
;
6744 argtype1
= ptr_type_node
;
6745 argtype0
= fn_ptr_type
;
6747 /* And the final __cxa_atexit type. */
6748 fn_type
= build_function_type_list (integer_type_node
,
6749 argtype0
, argtype1
, argtype2
,
6751 if (use_aeabi_atexit
)
6752 name
= "__aeabi_atexit";
6754 name
= "__cxa_atexit";
6758 /* The declaration for `atexit' is:
6760 int atexit (void (*)());
6762 We build up the argument types and then the function type
6764 fn_ptr_type
= get_atexit_fn_ptr_type ();
6765 /* Build the final atexit type. */
6766 fn_type
= build_function_type_list (integer_type_node
,
6767 fn_ptr_type
, NULL_TREE
);
6771 /* Now, build the function declaration. */
6772 push_lang_context (lang_name_c
);
6773 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6774 mark_used (atexit_fndecl
);
6775 pop_lang_context ();
6776 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6781 /* Like get_atexit_node, but for thread-local cleanups. */
6784 get_thread_atexit_node (void)
6786 /* The declaration for `__cxa_thread_atexit' is:
6788 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6789 tree fn_type
= build_function_type_list (integer_type_node
,
6790 get_atexit_fn_ptr_type (),
6791 ptr_type_node
, ptr_type_node
,
6794 /* Now, build the function declaration. */
6795 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6796 ECF_LEAF
| ECF_NOTHROW
);
6797 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6800 /* Returns the __dso_handle VAR_DECL. */
6803 get_dso_handle_node (void)
6805 if (dso_handle_node
)
6806 return dso_handle_node
;
6808 /* Declare the variable. */
6809 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6812 #ifdef HAVE_GAS_HIDDEN
6813 if (dso_handle_node
!= error_mark_node
)
6815 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6816 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6820 return dso_handle_node
;
6823 /* Begin a new function with internal linkage whose job will be simply
6824 to destroy some particular variable. */
6826 static GTY(()) int start_cleanup_cnt
;
6829 start_cleanup_fn (void)
6834 bool use_cxa_atexit
= flag_use_cxa_atexit
6835 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6837 push_to_top_level ();
6839 /* No need to mangle this. */
6840 push_lang_context (lang_name_c
);
6842 /* Build the name of the function. */
6843 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6844 /* Build the function declaration. */
6845 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6846 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6847 /* It's a function with internal linkage, generated by the
6849 TREE_PUBLIC (fndecl
) = 0;
6850 DECL_ARTIFICIAL (fndecl
) = 1;
6851 /* Make the function `inline' so that it is only emitted if it is
6852 actually needed. It is unlikely that it will be inlined, since
6853 it is only called via a function pointer, but we avoid unnecessary
6854 emissions this way. */
6855 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6856 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6857 /* Build the parameter. */
6862 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6863 DECL_CONTEXT (parmdecl
) = fndecl
;
6864 TREE_USED (parmdecl
) = 1;
6865 DECL_READ_P (parmdecl
) = 1;
6866 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6870 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6872 pop_lang_context ();
6874 return current_function_decl
;
6877 /* Finish the cleanup function begun by start_cleanup_fn. */
6880 end_cleanup_fn (void)
6882 expand_or_defer_fn (finish_function (0));
6884 pop_from_top_level ();
6887 /* Generate code to handle the destruction of DECL, an object with
6888 static storage duration. */
6891 register_dtor_fn (tree decl
)
6898 bool ob_parm
, dso_parm
, use_dtor
;
6899 tree arg0
, arg1
, arg2
;
6902 type
= TREE_TYPE (decl
);
6903 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6906 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6907 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6908 destructor to "__cxa_atexit"; we don't have to build a temporary
6909 function to do the cleanup. */
6910 dso_parm
= (flag_use_cxa_atexit
6911 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6912 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6913 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6918 /* Find the destructor. */
6919 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6920 gcc_assert (idx
>= 0);
6921 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6922 /* Make sure it is accessible. */
6923 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6924 tf_warning_or_error
);
6928 /* Call build_cleanup before we enter the anonymous function so
6929 that any access checks will be done relative to the current
6930 scope, rather than the scope of the anonymous function. */
6931 build_cleanup (decl
);
6933 /* Now start the function. */
6934 cleanup
= start_cleanup_fn ();
6936 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6937 to the original function, rather than the anonymous one. That
6938 will make the back end think that nested functions are in use,
6939 which causes confusion. */
6940 push_deferring_access_checks (dk_no_check
);
6941 fcall
= build_cleanup (decl
);
6942 pop_deferring_access_checks ();
6944 /* Create the body of the anonymous function. */
6945 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6946 finish_expr_stmt (fcall
);
6947 finish_compound_stmt (compound_stmt
);
6951 /* Call atexit with the cleanup function. */
6952 mark_used (cleanup
);
6953 cleanup
= build_address (cleanup
);
6955 if (DECL_THREAD_LOCAL_P (decl
))
6956 atex_node
= get_thread_atexit_node ();
6958 atex_node
= get_atexit_node ();
6962 /* We must convert CLEANUP to the type that "__cxa_atexit"
6964 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6965 /* "__cxa_atexit" will pass the address of DECL to the
6966 cleanup function. */
6968 addr
= build_address (decl
);
6969 /* The declared type of the parameter to "__cxa_atexit" is
6970 "void *". For plain "T*", we could just let the
6971 machinery in cp_build_function_call convert it -- but if the
6972 type is "cv-qualified T *", then we need to convert it
6973 before passing it in, to avoid spurious errors. */
6974 addr
= build_nop (ptr_type_node
, addr
);
6977 /* Since the cleanup functions we build ignore the address
6978 they're given, there's no reason to pass the actual address
6979 in, and, in general, it's cheaper to pass NULL than any
6981 addr
= null_pointer_node
;
6984 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6985 tf_warning_or_error
);
6987 /* Just pass NULL to the dso handle parm if we don't actually
6988 have a DSO handle on this target. */
6989 arg2
= null_pointer_node
;
6995 if (!DECL_THREAD_LOCAL_P (decl
)
6996 && targetm
.cxx
.use_aeabi_atexit ())
7012 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7013 arg0
, arg1
, arg2
, NULL_TREE
);
7016 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7017 is its initializer. Generate code to handle the construction
7018 and destruction of DECL. */
7021 expand_static_init (tree decl
, tree init
)
7023 gcc_assert (VAR_P (decl
));
7024 gcc_assert (TREE_STATIC (decl
));
7026 /* Some variables require no dynamic initialization. */
7028 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7030 /* Make sure the destructor is callable. */
7031 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7035 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7036 && !DECL_FUNCTION_SCOPE_P (decl
))
7039 error ("non-local variable %qD declared %<__thread%> "
7040 "needs dynamic initialization", decl
);
7042 error ("non-local variable %qD declared %<__thread%> "
7043 "has a non-trivial destructor", decl
);
7044 static bool informed
;
7047 inform (DECL_SOURCE_LOCATION (decl
),
7048 "C++11 %<thread_local%> allows dynamic initialization "
7055 if (DECL_FUNCTION_SCOPE_P (decl
))
7057 /* Emit code to perform this initialization but once. */
7058 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7059 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7060 tree guard
, guard_addr
;
7062 /* We don't need thread-safety code for thread-local vars. */
7063 bool thread_guard
= (flag_threadsafe_statics
7064 && !DECL_THREAD_LOCAL_P (decl
));
7066 /* Emit code to perform this initialization but once. This code
7069 static <type> guard;
7070 if (!guard.first_byte) {
7071 if (__cxa_guard_acquire (&guard)) {
7074 // Do initialization.
7075 flag = true; __cxa_guard_release (&guard);
7076 // Register variable for destruction at end of program.
7078 if (!flag) __cxa_guard_abort (&guard);
7082 Note that the `flag' variable is only set to 1 *after* the
7083 initialization is complete. This ensures that an exception,
7084 thrown during the construction, will cause the variable to
7085 reinitialized when we pass through this code again, as per:
7089 If the initialization exits by throwing an exception, the
7090 initialization is not complete, so it will be tried again
7091 the next time control enters the declaration.
7093 This process should be thread-safe, too; multiple threads
7094 should not be able to initialize the variable more than
7097 /* Create the guard variable. */
7098 guard
= get_guard (decl
);
7100 /* This optimization isn't safe on targets with relaxed memory
7101 consistency. On such targets we force synchronization in
7102 __cxa_guard_acquire. */
7103 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7105 /* Begin the conditional initialization. */
7106 if_stmt
= begin_if_stmt ();
7107 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7108 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7113 tree vfntype
= NULL_TREE
;
7114 tree acquire_name
, release_name
, abort_name
;
7115 tree acquire_fn
, release_fn
, abort_fn
;
7116 guard_addr
= build_address (guard
);
7118 acquire_name
= get_identifier ("__cxa_guard_acquire");
7119 release_name
= get_identifier ("__cxa_guard_release");
7120 abort_name
= get_identifier ("__cxa_guard_abort");
7121 acquire_fn
= identifier_global_value (acquire_name
);
7122 release_fn
= identifier_global_value (release_name
);
7123 abort_fn
= identifier_global_value (abort_name
);
7125 acquire_fn
= push_library_fn
7126 (acquire_name
, build_function_type_list (integer_type_node
,
7127 TREE_TYPE (guard_addr
),
7129 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7130 if (!release_fn
|| !abort_fn
)
7131 vfntype
= build_function_type_list (void_type_node
,
7132 TREE_TYPE (guard_addr
),
7135 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7136 ECF_NOTHROW
| ECF_LEAF
);
7138 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7139 ECF_NOTHROW
| ECF_LEAF
);
7141 inner_if_stmt
= begin_if_stmt ();
7142 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7145 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7146 begin
= get_target_expr (boolean_false_node
);
7147 flag
= TARGET_EXPR_SLOT (begin
);
7149 TARGET_EXPR_CLEANUP (begin
)
7150 = build3 (COND_EXPR
, void_type_node
, flag
,
7152 build_call_n (abort_fn
, 1, guard_addr
));
7153 CLEANUP_EH_ONLY (begin
) = 1;
7155 /* Do the initialization itself. */
7156 init
= add_stmt_to_compound (begin
, init
);
7157 init
= add_stmt_to_compound
7158 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7159 init
= add_stmt_to_compound
7160 (init
, build_call_n (release_fn
, 1, guard_addr
));
7163 init
= add_stmt_to_compound (init
, set_guard (guard
));
7165 /* Use atexit to register a function for destroying this static
7167 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7169 finish_expr_stmt (init
);
7173 finish_compound_stmt (inner_then_clause
);
7174 finish_then_clause (inner_if_stmt
);
7175 finish_if_stmt (inner_if_stmt
);
7178 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7180 finish_compound_stmt (then_clause
);
7181 finish_then_clause (if_stmt
);
7182 finish_if_stmt (if_stmt
);
7185 else if (DECL_THREAD_LOCAL_P (decl
))
7186 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7188 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7192 /* Make TYPE a complete type based on INITIAL_VALUE.
7193 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7194 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7195 3 if the initializer list is empty (in pedantic mode). */
7198 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7201 tree type
, elt_type
;
7203 /* Don't get confused by a CONSTRUCTOR for some other type. */
7204 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7205 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7210 unsigned HOST_WIDE_INT i
;
7213 /* An array of character type can be initialized from a
7214 brace-enclosed string constant.
7216 FIXME: this code is duplicated from reshape_init. Probably
7217 we should just call reshape_init here? */
7218 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7219 && TREE_CODE (initial_value
) == CONSTRUCTOR
7220 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7222 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7223 tree value
= (*v
)[0].value
;
7225 if (TREE_CODE (value
) == STRING_CST
7226 && v
->length () == 1)
7227 initial_value
= value
;
7230 /* If any of the elements are parameter packs, we can't actually
7231 complete this type now because the array size is dependent. */
7232 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7234 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7237 if (PACK_EXPANSION_P (value
))
7243 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7245 /* We can create the array before the element type is complete, which
7246 means that we didn't have these two bits set in the original type
7247 either. In completing the type, we are expected to propagate these
7248 bits. See also complete_type which does the same thing for arrays
7251 if (TYPE_DOMAIN (type
))
7253 elt_type
= TREE_TYPE (type
);
7254 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7255 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7256 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7262 /* As above, but either give an error or reject zero-size arrays, depending
7266 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7267 bool do_default
, tsubst_flags_t complain
)
7270 bool sfinae
= !(complain
& tf_error
);
7271 /* In SFINAE context we can't be lenient about zero-size arrays. */
7274 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7280 /* Not an error. */;
7281 else if (failure
== 1)
7282 error ("initializer fails to determine size of %qT", *ptype
);
7283 else if (failure
== 2)
7286 error ("array size missing in %qT", *ptype
);
7288 else if (failure
== 3)
7289 error ("zero-size array %qT", *ptype
);
7290 *ptype
= error_mark_node
;
7295 /* Return zero if something is declared to be a member of type
7296 CTYPE when in the context of CUR_TYPE. STRING is the error
7297 message to print in that case. Otherwise, quietly return 1. */
7300 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7302 if (ctype
&& ctype
!= cur_type
)
7304 if (flags
== DTOR_FLAG
)
7305 error ("destructor for alien class %qT cannot be a member", ctype
);
7307 error ("constructor for alien class %qT cannot be a member", ctype
);
7313 /* Subroutine of `grokdeclarator'. */
7315 /* Generate errors possibly applicable for a given set of specifiers.
7316 This is for ARM $7.1.2. */
7319 bad_specifiers (tree object
,
7320 enum bad_spec_place type
,
7331 error ("%qD declared as a %<virtual%> variable", object
);
7333 error ("%qD declared as an %<inline%> variable", object
);
7335 error ("%<const%> and %<volatile%> function specifiers on "
7336 "%qD invalid in variable declaration", object
);
7340 error ("%qD declared as a %<virtual%> parameter", object
);
7342 error ("%qD declared as an %<inline%> parameter", object
);
7344 error ("%<const%> and %<volatile%> function specifiers on "
7345 "%qD invalid in parameter declaration", object
);
7349 error ("%qD declared as a %<virtual%> type", object
);
7351 error ("%qD declared as an %<inline%> type", object
);
7353 error ("%<const%> and %<volatile%> function specifiers on "
7354 "%qD invalid in type declaration", object
);
7358 error ("%qD declared as a %<virtual%> field", object
);
7360 error ("%qD declared as an %<inline%> field", object
);
7362 error ("%<const%> and %<volatile%> function specifiers on "
7363 "%qD invalid in field declaration", object
);
7369 error ("%q+D declared as a friend", object
);
7371 && (TREE_CODE (object
) == TYPE_DECL
7372 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7373 && !TYPE_REFFN_P (TREE_TYPE (object
))
7374 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7375 error ("%q+D declared with an exception specification", object
);
7378 /* DECL is a member function or static data member and is presently
7379 being defined. Check that the definition is taking place in a
7383 check_class_member_definition_namespace (tree decl
)
7385 /* These checks only apply to member functions and static data
7387 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7388 /* We check for problems with specializations in pt.c in
7389 check_specialization_namespace, where we can issue better
7391 if (processing_specialization
)
7393 /* There are no restrictions on the placement of
7394 explicit instantiations. */
7395 if (processing_explicit_instantiation
)
7399 A member function definition that appears outside of the
7400 class definition shall appear in a namespace scope enclosing
7401 the class definition.
7405 The definition for a static data member shall appear in a
7406 namespace scope enclosing the member's class definition. */
7407 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7408 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7409 decl
, DECL_CONTEXT (decl
));
7412 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7413 METHOD_TYPE for a non-static member function; QUALS are the
7414 cv-qualifiers that apply to the function. */
7417 build_this_parm (tree type
, cp_cv_quals quals
)
7422 cp_cv_quals this_quals
;
7424 if (CLASS_TYPE_P (type
))
7427 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7428 this_type
= build_pointer_type (this_type
);
7431 this_type
= type_of_this_parm (type
);
7432 /* The `this' parameter is implicitly `const'; it cannot be
7434 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7435 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7436 parm
= build_artificial_parm (this_identifier
, qual_type
);
7437 cp_apply_type_quals_to_decl (this_quals
, parm
);
7441 /* DECL is a static member function. Complain if it was declared
7442 with function-cv-quals. */
7445 check_static_quals (tree decl
, cp_cv_quals quals
)
7447 if (quals
!= TYPE_UNQUALIFIED
)
7448 error ("static member function %q#D declared with type qualifiers",
7452 /* Helper function. Replace the temporary this parameter injected
7453 during cp_finish_omp_declare_simd with the real this parameter. */
7456 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7458 tree this_parm
= (tree
) data
;
7459 if (TREE_CODE (*tp
) == PARM_DECL
7460 && DECL_NAME (*tp
) == this_identifier
7461 && *tp
!= this_parm
)
7463 else if (TYPE_P (*tp
))
7468 /* CTYPE is class type, or null if non-class.
7469 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7471 DECLARATOR is the function's name.
7472 PARMS is a chain of PARM_DECLs for the function.
7473 VIRTUALP is truthvalue of whether the function is virtual or not.
7474 FLAGS are to be passed through to `grokclassfn'.
7475 QUALS are qualifiers indicating whether the function is `const'
7477 RAISES is a list of exceptions that this function can raise.
7478 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7479 not look, and -1 if we should not call `grokclassfn' at all.
7481 SFK is the kind of special function (if any) for the new function.
7483 Returns `NULL_TREE' if something goes wrong, after issuing
7484 applicable error messages. */
7487 grokfndecl (tree ctype
,
7491 tree orig_declarator
,
7493 enum overload_flags flags
,
7495 cp_ref_qualifier rqual
,
7501 special_function_kind sfk
,
7506 location_t location
)
7509 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7513 type
= build_ref_qualified_type (type
, rqual
);
7515 type
= build_exception_variant (type
, raises
);
7517 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7519 /* If we have an explicit location, use it, otherwise use whatever
7520 build_lang_decl used (probably input_location). */
7521 if (location
!= UNKNOWN_LOCATION
)
7522 DECL_SOURCE_LOCATION (decl
) = location
;
7524 if (TREE_CODE (type
) == METHOD_TYPE
)
7527 parm
= build_this_parm (type
, quals
);
7528 DECL_CHAIN (parm
) = parms
;
7531 DECL_ARGUMENTS (decl
) = parms
;
7532 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7533 DECL_CONTEXT (t
) = decl
;
7534 /* Propagate volatile out from type to decl. */
7535 if (TYPE_VOLATILE (type
))
7536 TREE_THIS_VOLATILE (decl
) = 1;
7538 /* Setup decl according to sfk. */
7541 case sfk_constructor
:
7542 case sfk_copy_constructor
:
7543 case sfk_move_constructor
:
7544 DECL_CONSTRUCTOR_P (decl
) = 1;
7546 case sfk_destructor
:
7547 DECL_DESTRUCTOR_P (decl
) = 1;
7553 /* If pointers to member functions use the least significant bit to
7554 indicate whether a function is virtual, ensure a pointer
7555 to this function will have that bit clear. */
7556 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7557 && TREE_CODE (type
) == METHOD_TYPE
7558 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7559 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7562 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7566 ("defining explicit specialization %qD in friend declaration",
7570 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7571 tree args
= TREE_OPERAND (orig_declarator
, 1);
7573 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7575 /* Something like `template <class T> friend void f<T>()'. */
7576 error ("invalid use of template-id %qD in declaration "
7577 "of primary template",
7583 /* A friend declaration of the form friend void f<>(). Record
7584 the information in the TEMPLATE_ID_EXPR. */
7585 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7587 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7588 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7590 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7591 if (TREE_PURPOSE (t
)
7592 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7594 error ("default arguments are not allowed in declaration "
7595 "of friend template specialization %qD",
7601 error ("%<inline%> is not allowed in declaration of friend "
7602 "template specialization %qD",
7605 error ("%<constexpr%> is not allowed in declaration of friend "
7606 "template specialization %qD",
7613 /* If this decl has namespace scope, set that up. */
7615 set_decl_namespace (decl
, in_namespace
, friendp
);
7617 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7619 /* `main' and builtins have implicit 'C' linkage. */
7620 if ((MAIN_NAME_P (declarator
)
7621 || (IDENTIFIER_LENGTH (declarator
) > 10
7622 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7623 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7624 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7625 || (targetcm
.cxx_implicit_extern_c
7626 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7627 && current_lang_name
== lang_name_cplusplus
7628 && ctype
== NULL_TREE
7629 && DECL_FILE_SCOPE_P (decl
))
7630 SET_DECL_LANGUAGE (decl
, lang_c
);
7632 /* Should probably propagate const out from type to decl I bet (mrs). */
7635 DECL_STATIC_FUNCTION_P (decl
) = 1;
7636 DECL_CONTEXT (decl
) = ctype
;
7641 DECL_CONTEXT (decl
) = ctype
;
7643 check_class_member_definition_namespace (decl
);
7646 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7648 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7649 error ("cannot declare %<::main%> to be a template");
7651 error ("cannot declare %<::main%> to be inline");
7653 error ("cannot declare %<::main%> to be constexpr");
7655 error ("cannot declare %<::main%> to be static");
7660 /* Members of anonymous types and local classes have no linkage; make
7661 them internal. If a typedef is made later, this will be changed. */
7662 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7663 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7666 if (publicp
&& cxx_dialect
== cxx98
)
7668 /* [basic.link]: A name with no linkage (notably, the name of a class
7669 or enumeration declared in a local scope) shall not be used to
7670 declare an entity with linkage.
7672 DR 757 relaxes this restriction for C++0x. */
7673 no_linkage_error (decl
);
7676 TREE_PUBLIC (decl
) = publicp
;
7679 DECL_INTERFACE_KNOWN (decl
) = 1;
7680 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7683 /* If the declaration was declared inline, mark it as such. */
7686 DECL_DECLARED_INLINE_P (decl
) = 1;
7687 DECL_COMDAT (decl
) = 1;
7690 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7692 DECL_EXTERNAL (decl
) = 1;
7693 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7698 ? G_("static member function %qD cannot have cv-qualifier")
7699 : G_("non-member function %qD cannot have cv-qualifier"),
7701 quals
= TYPE_UNQUALIFIED
;
7707 ? G_("static member function %qD cannot have ref-qualifier")
7708 : G_("non-member function %qD cannot have ref-qualifier"),
7710 rqual
= REF_QUAL_NONE
;
7714 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7715 && !grok_op_properties (decl
, /*complain=*/true))
7717 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7719 bool long_long_unsigned_p
;
7721 const char *suffix
= NULL
;
7722 /* [over.literal]/6: Literal operators shall not have C linkage. */
7723 if (DECL_LANGUAGE (decl
) == lang_c
)
7725 error ("literal operator with C linkage");
7729 if (DECL_NAMESPACE_SCOPE_P (decl
))
7731 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7734 error ("%qD has invalid argument list", decl
);
7738 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7739 if (long_long_unsigned_p
)
7741 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7742 warning (0, "integer suffix %<%s%>"
7743 " shadowed by implementation", suffix
);
7745 else if (long_double_p
)
7747 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7748 warning (0, "floating point suffix %<%s%>"
7749 " shadowed by implementation", suffix
);
7754 error ("%qD must be a non-member function", decl
);
7760 /* Make the init_value nonzero so pushdecl knows this is not
7761 tentative. error_mark_node is replaced later with the BLOCK. */
7762 DECL_INITIAL (decl
) = error_mark_node
;
7764 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7765 TREE_NOTHROW (decl
) = 1;
7767 if (flag_openmp
|| flag_cilkplus
)
7769 /* Adjust "omp declare simd" attributes. */
7770 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7774 for (attr
= ods
; attr
;
7775 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7777 if (TREE_CODE (type
) == METHOD_TYPE
)
7778 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7779 DECL_ARGUMENTS (decl
), NULL
);
7780 if (TREE_VALUE (attr
) != NULL_TREE
)
7782 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7783 cl
= c_omp_declare_simd_clauses_to_numbers
7784 (DECL_ARGUMENTS (decl
), cl
);
7786 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7788 TREE_VALUE (attr
) = NULL_TREE
;
7794 /* Caller will do the rest of this. */
7798 if (ctype
!= NULL_TREE
)
7799 grokclassfn (ctype
, decl
, flags
);
7802 if (cxx_dialect
>= cxx11
7803 && DECL_DESTRUCTOR_P (decl
)
7804 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7805 && !processing_template_decl
)
7806 deduce_noexcept_on_destructor (decl
);
7808 decl
= check_explicit_specialization (orig_declarator
, decl
,
7811 4 * (friendp
!= 0));
7812 if (decl
== error_mark_node
)
7815 if (DECL_STATIC_FUNCTION_P (decl
))
7816 check_static_quals (decl
, quals
);
7820 cplus_decl_attributes (&decl
, *attrlist
, 0);
7821 *attrlist
= NULL_TREE
;
7824 /* Check main's type after attributes have been applied. */
7825 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7827 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7830 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7832 error ("%<::main%> must return %<int%>");
7833 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7834 TREE_TYPE (decl
) = newtype
;
7837 check_main_parameter_types (decl
);
7840 if (ctype
!= NULL_TREE
7841 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7844 tree old_decl
= check_classfn (ctype
, decl
,
7845 (processing_template_decl
7846 > template_class_depth (ctype
))
7847 ? current_template_parms
7850 if (old_decl
== error_mark_node
)
7858 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7859 /* Because grokfndecl is always supposed to return a
7860 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7861 here. We depend on our callers to figure out that its
7862 really a template that's being returned. */
7863 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7865 if (DECL_STATIC_FUNCTION_P (old_decl
)
7866 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7868 /* Remove the `this' parm added by grokclassfn. */
7869 revert_static_member_fn (decl
);
7870 check_static_quals (decl
, quals
);
7872 if (DECL_ARTIFICIAL (old_decl
))
7874 error ("definition of implicitly-declared %qD", old_decl
);
7877 else if (DECL_DEFAULTED_FN (old_decl
))
7879 error ("definition of explicitly-defaulted %q+D", decl
);
7880 error ("%q+#D explicitly defaulted here", old_decl
);
7884 /* Since we've smashed OLD_DECL to its
7885 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7886 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7887 decl
= DECL_TEMPLATE_RESULT (decl
);
7889 /* Attempt to merge the declarations. This can fail, in
7890 the case of some invalid specialization declarations. */
7891 pushed_scope
= push_scope (ctype
);
7892 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7894 pop_scope (pushed_scope
);
7897 error ("no %q#D member function declared in class %qT",
7901 if (ok
== error_mark_node
)
7907 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7910 if (ctype
== NULL_TREE
|| check
)
7914 DECL_VIRTUAL_P (decl
) = 1;
7919 /* decl is a FUNCTION_DECL.
7920 specifiers are the parsed virt-specifiers.
7922 Set flags to reflect the virt-specifiers.
7927 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7929 if (decl
== NULL_TREE
)
7931 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7932 DECL_OVERRIDE_P (decl
) = 1;
7933 if (specifiers
& VIRT_SPEC_FINAL
)
7934 DECL_FINAL_P (decl
) = 1;
7938 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7939 the linkage that DECL will receive in the object file. */
7942 set_linkage_for_static_data_member (tree decl
)
7944 /* A static data member always has static storage duration and
7945 external linkage. Note that static data members are forbidden in
7946 local classes -- the only situation in which a class has
7947 non-external linkage. */
7948 TREE_PUBLIC (decl
) = 1;
7949 TREE_STATIC (decl
) = 1;
7950 /* For non-template classes, static data members are always put
7951 out in exactly those files where they are defined, just as
7952 with ordinary namespace-scope variables. */
7953 if (!processing_template_decl
)
7954 DECL_INTERFACE_KNOWN (decl
) = 1;
7957 /* Create a VAR_DECL named NAME with the indicated TYPE.
7959 If SCOPE is non-NULL, it is the class type or namespace containing
7960 the variable. If SCOPE is NULL, the variable should is created in
7961 the innermost enclosing scope. */
7964 grokvardecl (tree type
,
7966 tree orig_declarator
,
7967 const cp_decl_specifier_seq
*declspecs
,
7974 tree explicit_scope
;
7976 gcc_assert (!name
|| identifier_p (name
));
7978 /* Compute the scope in which to place the variable, but remember
7979 whether or not that scope was explicitly specified by the user. */
7980 explicit_scope
= scope
;
7983 /* An explicit "extern" specifier indicates a namespace-scope
7985 if (declspecs
->storage_class
== sc_extern
)
7986 scope
= current_decl_namespace ();
7987 else if (!at_function_scope_p ())
7988 scope
= current_scope ();
7992 && (/* If the variable is a namespace-scope variable declared in a
7993 template, we need DECL_LANG_SPECIFIC. */
7994 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7995 /* Similarly for namespace-scope variables with language linkage
7997 || (TREE_CODE (scope
) == NAMESPACE_DECL
7998 && current_lang_name
!= lang_name_cplusplus
)
7999 /* Similarly for static data members. */
8001 /* Similarly for explicit specializations. */
8003 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8004 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8006 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8008 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8009 set_decl_namespace (decl
, explicit_scope
, 0);
8011 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8013 if (declspecs
->storage_class
== sc_extern
)
8015 DECL_THIS_EXTERN (decl
) = 1;
8016 DECL_EXTERNAL (decl
) = !initialized
;
8019 if (DECL_CLASS_SCOPE_P (decl
))
8021 set_linkage_for_static_data_member (decl
);
8022 /* This function is only called with out-of-class definitions. */
8023 DECL_EXTERNAL (decl
) = 0;
8024 check_class_member_definition_namespace (decl
);
8026 /* At top level, either `static' or no s.c. makes a definition
8027 (perhaps tentative), and absence of `static' makes it public. */
8028 else if (toplevel_bindings_p ())
8030 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8031 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8032 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8034 /* Not at top level, only `static' makes a static definition. */
8037 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8038 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8041 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8043 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8044 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8045 if (declspecs
->gnu_thread_keyword_p
)
8046 DECL_GNU_TLS_P (decl
) = true;
8049 /* If the type of the decl has no linkage, make sure that we'll
8050 notice that in mark_used. */
8051 if (cxx_dialect
> cxx98
8052 && decl_linkage (decl
) != lk_none
8053 && DECL_LANG_SPECIFIC (decl
) == NULL
8054 && !DECL_EXTERN_C_P (decl
)
8055 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8056 retrofit_lang_decl (decl
);
8058 if (TREE_PUBLIC (decl
))
8060 /* [basic.link]: A name with no linkage (notably, the name of a class
8061 or enumeration declared in a local scope) shall not be used to
8062 declare an entity with linkage.
8064 DR 757 relaxes this restriction for C++0x. */
8065 if (cxx_dialect
< cxx11
)
8066 no_linkage_error (decl
);
8069 DECL_INTERFACE_KNOWN (decl
) = 1;
8071 // Handle explicit specializations and instantiations of variable templates.
8072 if (orig_declarator
)
8073 decl
= check_explicit_specialization (orig_declarator
, decl
,
8076 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8079 /* Create and return a canonical pointer to member function type, for
8080 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8083 build_ptrmemfunc_type (tree type
)
8087 tree unqualified_variant
= NULL_TREE
;
8089 if (type
== error_mark_node
)
8092 /* If a canonical type already exists for this type, use it. We use
8093 this method instead of type_hash_canon, because it only does a
8094 simple equality check on the list of field members. */
8096 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8099 /* Make sure that we always have the unqualified pointer-to-member
8101 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8103 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8105 t
= make_node (RECORD_TYPE
);
8107 /* Let the front end know this is a pointer to member function. */
8108 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8110 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8113 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8115 DECL_CHAIN (field
) = fields
;
8118 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8120 /* Zap out the name so that the back end will give us the debugging
8121 information for this anonymous RECORD_TYPE. */
8122 TYPE_NAME (t
) = NULL_TREE
;
8124 /* If this is not the unqualified form of this pointer-to-member
8125 type, set the TYPE_MAIN_VARIANT for this type to be the
8126 unqualified type. Since they are actually RECORD_TYPEs that are
8127 not variants of each other, we must do this manually.
8128 As we just built a new type there is no need to do yet another copy. */
8129 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8131 int type_quals
= cp_type_quals (type
);
8132 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
8133 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
8134 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
8135 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8136 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8137 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8140 /* Cache this pointer-to-member type so that we can find it again
8142 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8144 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8145 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8146 else if (TYPE_CANONICAL (type
) != type
)
8147 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8152 /* Create and return a pointer to data member type. */
8155 build_ptrmem_type (tree class_type
, tree member_type
)
8157 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8159 cp_cv_quals quals
= type_memfn_quals (member_type
);
8160 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8161 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8162 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8166 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8167 return build_offset_type (class_type
, member_type
);
8171 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8172 Check to see that the definition is valid. Issue appropriate error
8173 messages. Return 1 if the definition is particularly bad, or 0
8177 check_static_variable_definition (tree decl
, tree type
)
8179 /* Can't check yet if we don't know the type. */
8180 if (dependent_type_p (type
))
8182 /* If DECL is declared constexpr, we'll do the appropriate checks
8183 in check_initializer. */
8184 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8186 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8188 if (!COMPLETE_TYPE_P (type
))
8189 error ("in-class initialization of static data member %q#D of "
8190 "incomplete type", decl
);
8191 else if (literal_type_p (type
))
8192 permerror (input_location
,
8193 "%<constexpr%> needed for in-class initialization of "
8194 "static data member %q#D of non-integral type", decl
);
8196 error ("in-class initialization of static data member %q#D of "
8197 "non-literal type", decl
);
8201 /* Motion 10 at San Diego: If a static const integral data member is
8202 initialized with an integral constant expression, the initializer
8203 may appear either in the declaration (within the class), or in
8204 the definition, but not both. If it appears in the class, the
8205 member is a member constant. The file-scope definition is always
8207 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8209 error ("invalid in-class initialization of static data member "
8210 "of non-integral type %qT",
8214 else if (!CP_TYPE_CONST_P (type
))
8215 error ("ISO C++ forbids in-class initialization of non-const "
8216 "static member %qD",
8218 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8219 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8220 "%qD of non-integral type %qT", decl
, type
);
8225 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8226 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8227 expressions out into temporary variables so that walk_tree doesn't
8228 step into them (c++/15764). */
8231 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8233 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8234 tree expr
= *expr_p
;
8235 if (TREE_CODE (expr
) == SAVE_EXPR
)
8237 tree op
= TREE_OPERAND (expr
, 0);
8238 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8239 if (TREE_SIDE_EFFECTS (op
))
8240 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8243 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8248 /* Entry point for the above. */
8251 stabilize_vla_size (tree size
)
8253 hash_set
<tree
> pset
;
8254 /* Break out any function calls into temporary variables. */
8255 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8258 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8259 not inside of SAVE_EXPR and fold them. */
8262 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8264 tree expr
= *expr_p
;
8265 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8267 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8269 *(bool *)data
= true;
8270 if (SIZEOF_EXPR_TYPE_P (expr
))
8271 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8272 SIZEOF_EXPR
, false);
8273 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8274 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8277 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8279 if (expr
== error_mark_node
)
8280 expr
= size_one_node
;
8287 /* Given the SIZE (i.e., number of elements) in an array, compute an
8288 appropriate index type for the array. If non-NULL, NAME is the
8289 name of the thing being declared. */
8292 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8297 if (error_operand_p (size
))
8298 return error_mark_node
;
8300 if (!type_dependent_expression_p (size
))
8302 tree type
= TREE_TYPE (size
);
8304 mark_rvalue_use (size
);
8306 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8307 && TREE_SIDE_EFFECTS (size
))
8308 /* In C++98, we mark a non-constant array bound with a magic
8309 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8312 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8314 if (CLASS_TYPE_P (type
)
8315 && CLASSTYPE_LITERAL_P (type
))
8317 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8320 if (!(complain
& tf_error
))
8321 return error_mark_node
;
8323 error ("size of array %qD has non-integral type %qT",
8326 error ("size of array has non-integral type %qT", type
);
8327 size
= integer_one_node
;
8329 if (size
== error_mark_node
)
8330 return error_mark_node
;
8331 type
= TREE_TYPE (size
);
8334 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8335 size
= maybe_constant_value (size
);
8337 if (!TREE_CONSTANT (size
))
8341 if (error_operand_p (size
))
8342 return error_mark_node
;
8344 /* The array bound must be an integer type. */
8345 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8347 if (!(complain
& tf_error
))
8348 return error_mark_node
;
8350 error ("size of array %qD has non-integral type %qT", name
, type
);
8352 error ("size of array has non-integral type %qT", type
);
8353 size
= integer_one_node
;
8354 type
= TREE_TYPE (size
);
8358 /* A type is dependent if it is...an array type constructed from any
8359 dependent type or whose size is specified by a constant expression
8360 that is value-dependent. */
8361 /* We can only call value_dependent_expression_p on integral constant
8362 expressions; treat non-constant expressions as dependent, too. */
8363 if (processing_template_decl
8364 && (type_dependent_expression_p (size
)
8365 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8367 /* We cannot do any checking for a SIZE that isn't known to be
8368 constant. Just build the index type and mark that it requires
8369 structural equality checks. */
8370 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8371 size
, size_one_node
));
8372 TYPE_DEPENDENT_P (itype
) = 1;
8373 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8374 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8378 /* Normally, the array-bound will be a constant. */
8379 if (TREE_CODE (size
) == INTEGER_CST
)
8381 /* Check to see if the array bound overflowed. Make that an
8382 error, no matter how generous we're being. */
8383 constant_expression_error (size
);
8385 /* An array must have a positive number of elements. */
8386 if (tree_int_cst_lt (size
, integer_zero_node
))
8388 if (!(complain
& tf_error
))
8389 return error_mark_node
;
8391 error ("size of array %qD is negative", name
);
8393 error ("size of array is negative");
8394 size
= integer_one_node
;
8396 /* As an extension we allow zero-sized arrays. */
8397 else if (integer_zerop (size
))
8399 if (!(complain
& tf_error
))
8400 /* We must fail if performing argument deduction (as
8401 indicated by the state of complain), so that
8402 another substitution can be found. */
8403 return error_mark_node
;
8404 else if (in_system_header_at (input_location
))
8405 /* Allow them in system headers because glibc uses them. */;
8407 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8409 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8412 else if (TREE_CONSTANT (size
)
8413 /* We don't allow VLAs at non-function scopes, or during
8414 tentative template substitution. */
8415 || !at_function_scope_p ()
8416 || (cxx_dialect
< cxx14
&& !(complain
& tf_error
)))
8418 if (!(complain
& tf_error
))
8419 return error_mark_node
;
8420 /* `(int) &fn' is not a valid array bound. */
8422 error ("size of array %qD is not an integral constant-expression",
8425 error ("size of array is not an integral constant-expression");
8426 size
= integer_one_node
;
8428 else if (cxx_dialect
< cxx14
&& pedantic
&& warn_vla
!= 0)
8431 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8433 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8435 else if (warn_vla
> 0)
8439 "variable length array %qD is used", name
);
8442 "variable length array is used");
8445 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8446 /* A variable sized array. */
8447 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8450 HOST_WIDE_INT saved_processing_template_decl
;
8452 /* Compute the index of the largest element in the array. It is
8453 one less than the number of elements in the array. We save
8454 and restore PROCESSING_TEMPLATE_DECL so that computations in
8455 cp_build_binary_op will be appropriately folded. */
8456 saved_processing_template_decl
= processing_template_decl
;
8457 processing_template_decl
= 0;
8458 itype
= cp_build_binary_op (input_location
,
8460 cp_convert (ssizetype
, size
, complain
),
8461 cp_convert (ssizetype
, integer_one_node
,
8464 itype
= fold (itype
);
8465 processing_template_decl
= saved_processing_template_decl
;
8467 if (!TREE_CONSTANT (itype
))
8469 /* A variable sized array. */
8470 itype
= variable_size (itype
);
8472 if (TREE_CODE (itype
) != SAVE_EXPR
)
8474 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8475 they might survive till gimplification. */
8476 tree newitype
= itype
;
8478 cp_walk_tree_without_duplicates (&newitype
,
8479 fold_sizeof_expr_r
, &found
);
8481 itype
= variable_size (fold (newitype
));
8484 stabilize_vla_size (itype
);
8486 if (cxx_dialect
>= cxx14
&& flag_exceptions
)
8488 /* If the VLA bound is larger than half the address space,
8489 or less than zero, throw std::bad_array_length. */
8490 tree comp
= build2 (LT_EXPR
, boolean_type_node
, itype
,
8492 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
8493 throw_bad_array_length (), void_node
);
8494 finish_expr_stmt (comp
);
8496 else if (flag_sanitize
& SANITIZE_VLA
8497 && current_function_decl
!= NULL_TREE
8498 && !lookup_attribute ("no_sanitize_undefined",
8500 (current_function_decl
)))
8502 /* From C++14 onwards, we throw an exception on a negative
8503 length size of an array; see above. */
8505 /* We have to add 1 -- in the ubsan routine we generate
8506 LE_EXPR rather than LT_EXPR. */
8507 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8508 build_one_cst (TREE_TYPE (itype
)));
8509 t
= ubsan_instrument_vla (input_location
, t
);
8510 finish_expr_stmt (t
);
8513 /* Make sure that there was no overflow when creating to a signed
8514 index type. (For example, on a 32-bit machine, an array with
8515 size 2^32 - 1 is too big.) */
8516 else if (TREE_CODE (itype
) == INTEGER_CST
8517 && TREE_OVERFLOW (itype
))
8519 if (!(complain
& tf_error
))
8520 return error_mark_node
;
8521 error ("overflow in array dimension");
8522 TREE_OVERFLOW (itype
) = 0;
8526 /* Create and return the appropriate index type. */
8527 itype
= build_index_type (itype
);
8529 /* If the index type were dependent, we would have returned early, so
8530 remember that it isn't. */
8531 TYPE_DEPENDENT_P (itype
) = 0;
8532 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8536 /* Returns the scope (if any) in which the entity declared by
8537 DECLARATOR will be located. If the entity was declared with an
8538 unqualified name, NULL_TREE is returned. */
8541 get_scope_of_declarator (const cp_declarator
*declarator
)
8543 while (declarator
&& declarator
->kind
!= cdk_id
)
8544 declarator
= declarator
->declarator
;
8546 /* If the declarator-id is a SCOPE_REF, the scope in which the
8547 declaration occurs is the first operand. */
8549 && declarator
->u
.id
.qualifying_scope
)
8550 return declarator
->u
.id
.qualifying_scope
;
8552 /* Otherwise, the declarator is not a qualified name; the entity will
8553 be declared in the current scope. */
8557 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8558 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8562 create_array_type_for_decl (tree name
, tree type
, tree size
)
8564 tree itype
= NULL_TREE
;
8566 /* If things have already gone awry, bail now. */
8567 if (type
== error_mark_node
|| size
== error_mark_node
)
8568 return error_mark_node
;
8570 /* 8.3.4/1: If the type of the identifier of D contains the auto
8571 type-specifier, the program is ill-formed. */
8572 if (type_uses_auto (type
))
8574 error ("%qD declared as array of %qT", name
, type
);
8575 return error_mark_node
;
8578 /* If there are some types which cannot be array elements,
8579 issue an error-message and return. */
8580 switch (TREE_CODE (type
))
8584 error ("declaration of %qD as array of void", name
);
8586 error ("creating array of void");
8587 return error_mark_node
;
8591 error ("declaration of %qD as array of functions", name
);
8593 error ("creating array of functions");
8594 return error_mark_node
;
8596 case REFERENCE_TYPE
:
8598 error ("declaration of %qD as array of references", name
);
8600 error ("creating array of references");
8601 return error_mark_node
;
8605 error ("declaration of %qD as array of function members", name
);
8607 error ("creating array of function members");
8608 return error_mark_node
;
8616 The constant expressions that specify the bounds of the arrays
8617 can be omitted only for the first member of the sequence. */
8618 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8621 error ("declaration of %qD as multidimensional array must "
8622 "have bounds for all dimensions except the first",
8625 error ("multidimensional array must have bounds for all "
8626 "dimensions except the first");
8628 return error_mark_node
;
8631 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
8632 && (flag_iso
|| warn_vla
> 0))
8633 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8635 /* Figure out the index type for the array. */
8637 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8640 T is called the array element type; this type shall not be [...] an
8641 abstract class type. */
8642 abstract_virtuals_error (name
, type
);
8644 return build_cplus_array_type (type
, itype
);
8647 /* Check that it's OK to declare a function with the indicated TYPE.
8648 SFK indicates the kind of special function (if any) that this
8649 function is. OPTYPE is the type given in a conversion operator
8650 declaration, or the class type for a constructor/destructor.
8651 Returns the actual return type of the function; that
8652 may be different than TYPE if an error occurs, or for certain
8653 special functions. */
8656 check_special_function_return_type (special_function_kind sfk
,
8662 case sfk_constructor
:
8664 error ("return type specification for constructor invalid");
8666 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8667 type
= build_pointer_type (optype
);
8669 type
= void_type_node
;
8672 case sfk_destructor
:
8674 error ("return type specification for destructor invalid");
8675 /* We can't use the proper return type here because we run into
8676 problems with ambiguous bases and covariant returns.
8677 Java classes are left unchanged because (void *) isn't a valid
8678 Java type, and we don't want to change the Java ABI. */
8679 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8680 type
= build_pointer_type (void_type_node
);
8682 type
= void_type_node
;
8685 case sfk_conversion
:
8687 error ("return type specified for %<operator %T%>", optype
);
8698 /* A variable or data member (whose unqualified name is IDENTIFIER)
8699 has been declared with the indicated TYPE. If the TYPE is not
8700 acceptable, issue an error message and return a type to use for
8701 error-recovery purposes. */
8704 check_var_type (tree identifier
, tree type
)
8706 if (VOID_TYPE_P (type
))
8709 error ("unnamed variable or field declared void");
8710 else if (identifier_p (identifier
))
8712 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8713 error ("variable or field %qE declared void", identifier
);
8716 error ("variable or field declared void");
8717 type
= error_mark_node
;
8723 /* Given declspecs and a declarator (abstract or otherwise), determine
8724 the name and type of the object declared and construct a DECL node
8727 DECLSPECS points to the representation of declaration-specifier
8728 sequence that precedes declarator.
8730 DECL_CONTEXT says which syntactic context this declaration is in:
8731 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8732 FUNCDEF for a function definition. Like NORMAL but a few different
8733 error messages in each case. Return value may be zero meaning
8734 this definition is too screwy to try to parse.
8735 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8736 handle member functions (which have FIELD context).
8737 Return value may be zero meaning this definition is too screwy to
8739 PARM for a parameter declaration (either within a function prototype
8740 or before a function body). Make a PARM_DECL, or return void_type_node.
8741 TPARM for a template parameter declaration.
8742 CATCHPARM for a parameter declaration before a catch clause.
8743 TYPENAME if for a typename (in a cast or sizeof).
8744 Don't make a DECL node; just return the ..._TYPE node.
8745 FIELD for a struct or union field; make a FIELD_DECL.
8746 BITFIELD for a field with specified width.
8748 INITIALIZED is as for start_decl.
8750 ATTRLIST is a pointer to the list of attributes, which may be NULL
8751 if there are none; *ATTRLIST may be modified if attributes from inside
8752 the declarator should be applied to the declaration.
8754 When this function is called, scoping variables (such as
8755 CURRENT_CLASS_TYPE) should reflect the scope in which the
8756 declaration occurs, not the scope in which the new declaration will
8757 be placed. For example, on:
8761 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8764 Returns a DECL (if a declarator is present), a TYPE (if there is no
8765 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8769 grokdeclarator (const cp_declarator
*declarator
,
8770 cp_decl_specifier_seq
*declspecs
,
8771 enum decl_context decl_context
,
8775 tree type
= NULL_TREE
;
8777 int explicit_int128
= 0;
8778 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8779 int explicit_int
= 0;
8780 int explicit_char
= 0;
8781 int defaulted_int
= 0;
8783 tree typedef_decl
= NULL_TREE
;
8784 const char *name
= NULL
;
8785 tree typedef_type
= NULL_TREE
;
8786 /* True if this declarator is a function definition. */
8787 bool funcdef_flag
= false;
8788 cp_declarator_kind innermost_code
= cdk_error
;
8791 /* See the code below that used this. */
8792 tree decl_attr
= NULL_TREE
;
8795 /* Keep track of what sort of function is being processed
8796 so that we can warn about default return values, or explicit
8797 return values which do not match prescribed defaults. */
8798 special_function_kind sfk
= sfk_none
;
8800 tree dname
= NULL_TREE
;
8801 tree ctor_return_type
= NULL_TREE
;
8802 enum overload_flags flags
= NO_SPECIAL
;
8803 /* cv-qualifiers that apply to the declarator, for a declaration of
8804 a member function. */
8805 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8806 /* virt-specifiers that apply to the declarator, for a declaration of
8807 a member function. */
8808 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8809 /* ref-qualifier that applies to the declarator, for a declaration of
8810 a member function. */
8811 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8812 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8814 tree raises
= NULL_TREE
;
8815 int template_count
= 0;
8816 tree returned_attrs
= NULL_TREE
;
8817 tree parms
= NULL_TREE
;
8818 const cp_declarator
*id_declarator
;
8819 /* The unqualified name of the declarator; either an
8820 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8821 tree unqualified_id
;
8822 /* The class type, if any, in which this entity is located,
8823 or NULL_TREE if none. Note that this value may be different from
8824 the current class type; for example if an attempt is made to declare
8825 "A::f" inside "B", this value will be "A". */
8826 tree ctype
= current_class_type
;
8827 /* The NAMESPACE_DECL for the namespace in which this entity is
8828 located. If an unqualified name is used to declare the entity,
8829 this value will be NULL_TREE, even if the entity is located at
8831 tree in_namespace
= NULL_TREE
;
8832 cp_storage_class storage_class
;
8833 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8834 bool type_was_error_mark_node
= false;
8835 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8836 bool template_type_arg
= false;
8837 bool template_parm_flag
= false;
8838 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8839 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8840 bool late_return_type_p
= false;
8841 bool array_parameter_p
= false;
8842 source_location saved_loc
= input_location
;
8845 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8846 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8847 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8848 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8849 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8850 explicit_int128
= declspecs
->explicit_int128_p
;
8851 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8853 if (decl_context
== FUNCDEF
)
8854 funcdef_flag
= true, decl_context
= NORMAL
;
8855 else if (decl_context
== MEMFUNCDEF
)
8856 funcdef_flag
= true, decl_context
= FIELD
;
8857 else if (decl_context
== BITFIELD
)
8858 bitfield
= 1, decl_context
= FIELD
;
8859 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8860 template_type_arg
= true, decl_context
= TYPENAME
;
8861 else if (decl_context
== TPARM
)
8862 template_parm_flag
= true, decl_context
= PARM
;
8864 if (initialized
> 1)
8865 funcdef_flag
= true;
8867 /* Look inside a declarator for the name being declared
8868 and get it as a string, for an error message. */
8869 for (id_declarator
= declarator
;
8871 id_declarator
= id_declarator
->declarator
)
8873 if (id_declarator
->kind
!= cdk_id
)
8874 innermost_code
= id_declarator
->kind
;
8876 switch (id_declarator
->kind
)
8879 if (id_declarator
->declarator
8880 && id_declarator
->declarator
->kind
== cdk_id
)
8882 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8883 if (sfk
== sfk_destructor
)
8890 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8891 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8894 if (qualifying_scope
)
8896 if (at_function_scope_p ())
8900 A declarator-id shall not be qualified except
8903 None of the cases are permitted in block
8905 if (qualifying_scope
== global_namespace
)
8906 error ("invalid use of qualified-name %<::%D%>",
8908 else if (TYPE_P (qualifying_scope
))
8909 error ("invalid use of qualified-name %<%T::%D%>",
8910 qualifying_scope
, decl
);
8912 error ("invalid use of qualified-name %<%D::%D%>",
8913 qualifying_scope
, decl
);
8914 return error_mark_node
;
8916 else if (TYPE_P (qualifying_scope
))
8918 ctype
= qualifying_scope
;
8919 if (!MAYBE_CLASS_TYPE_P (ctype
))
8921 error ("%q#T is not a class or a namespace", ctype
);
8924 else if (innermost_code
!= cdk_function
8925 && current_class_type
8926 && !uniquely_derived_from_p (ctype
,
8927 current_class_type
))
8929 error ("invalid use of qualified-name %<%T::%D%>",
8930 qualifying_scope
, decl
);
8931 return error_mark_node
;
8934 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8935 in_namespace
= qualifying_scope
;
8937 switch (TREE_CODE (decl
))
8943 if (innermost_code
!= cdk_function
)
8945 error ("declaration of %qD as non-function", decl
);
8946 return error_mark_node
;
8948 else if (!qualifying_scope
8949 && !(current_class_type
&& at_class_scope_p ()))
8951 error ("declaration of %qD as non-member", decl
);
8952 return error_mark_node
;
8955 type
= TREE_OPERAND (decl
, 0);
8957 type
= constructor_name (type
);
8958 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8963 case TEMPLATE_ID_EXPR
:
8965 tree fns
= TREE_OPERAND (decl
, 0);
8968 if (!identifier_p (dname
))
8970 if (variable_template_p (dname
))
8971 dname
= DECL_NAME (dname
);
8974 gcc_assert (is_overloaded_fn (dname
));
8975 dname
= DECL_NAME (get_first_fn (dname
));
8981 case IDENTIFIER_NODE
:
8982 if (identifier_p (decl
))
8985 if (C_IS_RESERVED_WORD (dname
))
8987 error ("declarator-id missing; using reserved word %qD",
8989 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8991 else if (!IDENTIFIER_TYPENAME_P (dname
))
8992 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8995 gcc_assert (flags
== NO_SPECIAL
);
8996 flags
= TYPENAME_FLAG
;
8997 ctor_return_type
= TREE_TYPE (dname
);
8998 sfk
= sfk_conversion
;
8999 if (is_typename_at_global_scope (dname
))
9000 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9002 name
= "<invalid operator>";
9019 return error_mark_node
;
9024 if (id_declarator
->kind
== cdk_id
)
9030 The declarator in a function-definition shall have the form
9031 D1 ( parameter-declaration-clause) ... */
9032 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9034 error ("function definition does not declare parameters");
9035 return error_mark_node
;
9038 if (flags
== TYPENAME_FLAG
9039 && innermost_code
!= cdk_function
9040 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9042 error ("declaration of %qD as non-function", dname
);
9043 return error_mark_node
;
9047 && identifier_p (dname
)
9048 && UDLIT_OPER_P (dname
)
9049 && innermost_code
!= cdk_function
)
9051 error ("declaration of %qD as non-function", dname
);
9052 return error_mark_node
;
9055 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9059 error ("declaration of %qD as %<typedef%>", dname
);
9060 return error_mark_node
;
9062 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9064 error ("declaration of %qD as parameter", dname
);
9065 return error_mark_node
;
9069 /* Anything declared one level down from the top level
9070 must be one of the parameters of a function
9071 (because the body is at least two levels down). */
9073 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9074 by not allowing C++ class definitions to specify their parameters
9075 with xdecls (must be spec.d in the parmlist).
9077 Since we now wait to push a class scope until we are sure that
9078 we are in a legitimate method context, we must set oldcname
9079 explicitly (since current_class_name is not yet alive).
9081 We also want to avoid calling this a PARM if it is in a namespace. */
9083 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9085 cp_binding_level
*b
= current_binding_level
;
9086 current_binding_level
= b
->level_chain
;
9087 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9088 decl_context
= PARM
;
9089 current_binding_level
= b
;
9093 name
= decl_context
== PARM
? "parameter" : "type name";
9095 if (constexpr_p
&& typedef_p
)
9097 error ("%<constexpr%> cannot appear in a typedef declaration");
9098 return error_mark_node
;
9101 /* If there were multiple types specified in the decl-specifier-seq,
9102 issue an error message. */
9103 if (declspecs
->multiple_types_p
)
9105 error ("two or more data types in declaration of %qs", name
);
9106 return error_mark_node
;
9109 if (declspecs
->conflicting_specifiers_p
)
9111 error ("conflicting specifiers in declaration of %qs", name
);
9112 return error_mark_node
;
9115 /* Extract the basic type from the decl-specifier-seq. */
9116 type
= declspecs
->type
;
9117 if (type
== error_mark_node
)
9120 type_was_error_mark_node
= true;
9122 /* If the entire declaration is itself tagged as deprecated then
9123 suppress reports of deprecated items. */
9124 if (type
&& TREE_DEPRECATED (type
)
9125 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9126 warn_deprecated_use (type
, NULL_TREE
);
9127 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9129 typedef_decl
= type
;
9130 type
= TREE_TYPE (typedef_decl
);
9131 if (TREE_DEPRECATED (type
)
9132 && DECL_ARTIFICIAL (typedef_decl
)
9133 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9134 warn_deprecated_use (type
, NULL_TREE
);
9136 /* No type at all: default to `int', and set DEFAULTED_INT
9137 because it was not a user-defined typedef. */
9138 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9140 /* These imply 'int'. */
9141 type
= integer_type_node
;
9145 explicit_int
= declspecs
->explicit_int_p
;
9146 explicit_char
= declspecs
->explicit_char_p
;
9149 /* See the code below that used this. */
9151 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9153 typedef_type
= type
;
9156 if (sfk
!= sfk_conversion
)
9157 ctor_return_type
= ctype
;
9159 if (sfk
!= sfk_none
)
9160 type
= check_special_function_return_type (sfk
, type
,
9162 else if (type
== NULL_TREE
)
9168 /* We handle `main' specially here, because 'main () { }' is so
9169 common. With no options, it is allowed. With -Wreturn-type,
9170 it is a warning. It is only an error with -pedantic-errors. */
9171 is_main
= (funcdef_flag
9172 && dname
&& identifier_p (dname
)
9173 && MAIN_NAME_P (dname
)
9174 && ctype
== NULL_TREE
9175 && in_namespace
== NULL_TREE
9176 && current_namespace
== global_namespace
);
9178 if (type_was_error_mark_node
)
9179 /* We've already issued an error, don't complain more. */;
9180 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9181 /* Allow it, sigh. */;
9183 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9185 pedwarn (input_location
, OPT_Wpedantic
,
9186 "ISO C++ forbids declaration of %qs with no type", name
);
9188 warning (OPT_Wreturn_type
,
9189 "ISO C++ forbids declaration of %qs with no type", name
);
9191 type
= integer_type_node
;
9196 if (explicit_int128
)
9198 if (int128_integer_type_node
== NULL_TREE
)
9200 error ("%<__int128%> is not supported by this target");
9201 explicit_int128
= false;
9203 else if (pedantic
&& ! in_system_header_at (input_location
))
9204 pedwarn (input_location
, OPT_Wpedantic
,
9205 "ISO C++ does not support %<__int128%> for %qs", name
);
9208 /* Now process the modifiers that were specified
9209 and check for invalid combinations. */
9211 /* Long double is a special combination. */
9212 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9215 type
= cp_build_qualified_type (long_double_type_node
,
9216 cp_type_quals (type
));
9219 /* Check all other uses of type modifiers. */
9221 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9225 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9226 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9227 else if (signed_p
&& unsigned_p
)
9228 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9229 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9230 error ("%<long long%> invalid for %qs", name
);
9231 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9232 error ("%<long%> invalid for %qs", name
);
9233 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9234 error ("%<short%> invalid for %qs", name
);
9235 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9236 error ("%<long%> or %<short%> invalid for %qs", name
);
9237 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9238 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9239 else if ((long_p
|| short_p
) && explicit_char
)
9240 error ("%<long%> or %<short%> specified with char for %qs", name
);
9241 else if (long_p
&& short_p
)
9242 error ("%<long%> and %<short%> specified together for %qs", name
);
9243 else if (type
== char16_type_node
|| type
== char32_type_node
)
9245 if (signed_p
|| unsigned_p
)
9246 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9247 else if (short_p
|| long_p
)
9248 error ("%<short%> or %<long%> invalid for %qs", name
);
9253 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9255 pedwarn (input_location
, OPT_Wpedantic
,
9256 "long, short, signed or unsigned used invalidly for %qs",
9258 if (flag_pedantic_errors
)
9263 /* Discard the type modifiers if they are invalid. */
9274 /* Decide whether an integer type is signed or not.
9275 Optionally treat bitfields as signed by default. */
9279 It is implementation-defined whether a plain (neither
9280 explicitly signed or unsigned) char, short, int, or long
9281 bit-field is signed or unsigned.
9283 Naturally, we extend this to long long as well. Note that
9284 this does not include wchar_t. */
9285 || (bitfield
&& !flag_signed_bitfields
9287 /* A typedef for plain `int' without `signed' can be
9288 controlled just like plain `int', but a typedef for
9289 `signed int' cannot be so controlled. */
9291 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9292 && TREE_CODE (type
) == INTEGER_TYPE
9293 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9295 if (explicit_int128
)
9296 type
= int128_unsigned_type_node
;
9298 type
= long_long_unsigned_type_node
;
9300 type
= long_unsigned_type_node
;
9302 type
= short_unsigned_type_node
;
9303 else if (type
== char_type_node
)
9304 type
= unsigned_char_type_node
;
9305 else if (typedef_decl
)
9306 type
= unsigned_type_for (type
);
9308 type
= unsigned_type_node
;
9310 else if (signed_p
&& type
== char_type_node
)
9311 type
= signed_char_type_node
;
9312 else if (explicit_int128
)
9313 type
= int128_integer_type_node
;
9315 type
= long_long_integer_type_node
;
9317 type
= long_integer_type_node
;
9319 type
= short_integer_type_node
;
9321 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9323 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9324 error ("complex invalid for %qs", name
);
9325 /* If we just have "complex", it is equivalent to
9326 "complex double", but if any modifiers at all are specified it is
9327 the complex form of TYPE. E.g, "complex short" is
9328 "complex short int". */
9329 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9330 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9331 type
= complex_double_type_node
;
9332 else if (type
== integer_type_node
)
9333 type
= complex_integer_type_node
;
9334 else if (type
== float_type_node
)
9335 type
= complex_float_type_node
;
9336 else if (type
== double_type_node
)
9337 type
= complex_double_type_node
;
9338 else if (type
== long_double_type_node
)
9339 type
= complex_long_double_type_node
;
9341 type
= build_complex_type (type
);
9344 type_quals
= TYPE_UNQUALIFIED
;
9345 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9346 type_quals
|= TYPE_QUAL_CONST
;
9347 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9348 type_quals
|= TYPE_QUAL_VOLATILE
;
9349 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9350 type_quals
|= TYPE_QUAL_RESTRICT
;
9351 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9352 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9355 /* If we're using the injected-class-name to form a compound type or a
9356 declaration, replace it with the underlying class so we don't get
9357 redundant typedefs in the debug output. But if we are returning the
9358 type unchanged, leave it alone so that it's available to
9359 maybe_get_template_decl_from_type_decl. */
9360 if (CLASS_TYPE_P (type
)
9361 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9362 && type
== TREE_TYPE (TYPE_NAME (type
))
9363 && (declarator
|| type_quals
))
9364 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9366 type_quals
|= cp_type_quals (type
);
9367 type
= cp_build_qualified_type_real
9368 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9369 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9370 /* We might have ignored or rejected some of the qualifiers. */
9371 type_quals
= cp_type_quals (type
);
9374 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9375 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9376 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9378 storage_class
= declspecs
->storage_class
;
9379 if (storage_class
== sc_static
)
9380 staticp
= 1 + (decl_context
== FIELD
);
9382 if (virtualp
&& staticp
== 2)
9384 error ("member %qD cannot be declared both virtual and static", dname
);
9385 storage_class
= sc_none
;
9388 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9390 /* Issue errors about use of storage classes for parameters. */
9391 if (decl_context
== PARM
)
9395 error ("typedef declaration invalid in parameter declaration");
9396 return error_mark_node
;
9398 else if (template_parm_flag
&& storage_class
!= sc_none
)
9400 error ("storage class specified for template parameter %qs", name
);
9401 return error_mark_node
;
9403 else if (storage_class
== sc_static
9404 || storage_class
== sc_extern
9406 error ("storage class specifiers invalid in parameter declarations");
9408 /* Function parameters cannot be constexpr. If we saw one, moan
9409 and pretend it wasn't there. */
9412 error ("a parameter cannot be declared %<constexpr%>");
9417 /* Give error if `virtual' is used outside of class declaration. */
9419 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9421 error ("%<virtual%> outside class declaration");
9425 /* Static anonymous unions are dealt with here. */
9426 if (staticp
&& decl_context
== TYPENAME
9428 && ANON_AGGR_TYPE_P (declspecs
->type
))
9429 decl_context
= FIELD
;
9431 /* Warn about storage classes that are invalid for certain
9432 kinds of declarations (parameters, typenames, etc.). */
9435 && storage_class
!= sc_extern
9436 && storage_class
!= sc_static
)
9439 error ("multiple storage classes in declaration of %qs", name
);
9442 if (decl_context
!= NORMAL
9443 && ((storage_class
!= sc_none
9444 && storage_class
!= sc_mutable
)
9447 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9448 && (storage_class
== sc_register
9449 || storage_class
== sc_auto
))
9453 else if (decl_context
== FIELD
9454 /* C++ allows static class elements. */
9455 && storage_class
== sc_static
)
9456 /* C++ also allows inlines and signed and unsigned elements,
9457 but in those cases we don't come in here. */
9461 if (decl_context
== FIELD
)
9462 error ("storage class specified for %qs", name
);
9465 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9466 error ("storage class specified for parameter %qs", name
);
9468 error ("storage class specified for typename");
9470 if (storage_class
== sc_register
9471 || storage_class
== sc_auto
9472 || storage_class
== sc_extern
9474 storage_class
= sc_none
;
9477 else if (storage_class
== sc_extern
&& funcdef_flag
9478 && ! toplevel_bindings_p ())
9479 error ("nested function %qs declared %<extern%>", name
);
9480 else if (toplevel_bindings_p ())
9482 if (storage_class
== sc_auto
)
9483 error ("top-level declaration of %qs specifies %<auto%>", name
);
9486 && storage_class
!= sc_extern
9487 && storage_class
!= sc_static
)
9489 if (declspecs
->gnu_thread_keyword_p
)
9490 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9491 "declared %<__thread%>", name
);
9493 /* When thread_local is applied to a variable of block scope the
9494 storage-class-specifier static is implied if it does not appear
9496 storage_class
= declspecs
->storage_class
= sc_static
;
9500 if (storage_class
&& friendp
)
9502 error ("storage class specifiers invalid in friend function declarations");
9503 storage_class
= sc_none
;
9508 unqualified_id
= NULL_TREE
;
9511 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9512 switch (TREE_CODE (unqualified_id
))
9515 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9516 if (TYPE_P (unqualified_id
))
9517 unqualified_id
= constructor_name (unqualified_id
);
9520 case IDENTIFIER_NODE
:
9521 case TEMPLATE_ID_EXPR
:
9529 if (declspecs
->std_attributes
)
9531 /* Apply the c++11 attributes to the type preceding them. */
9532 input_location
= declspecs
->locations
[ds_std_attribute
];
9533 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9534 input_location
= saved_loc
;
9537 /* Determine the type of the entity declared by recurring on the
9539 for (; declarator
; declarator
= declarator
->declarator
)
9541 const cp_declarator
*inner_declarator
;
9544 if (type
== error_mark_node
)
9545 return error_mark_node
;
9547 attrs
= declarator
->attributes
;
9553 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9554 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9555 if (declarator
->kind
== cdk_function
)
9556 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9557 if (declarator
->kind
== cdk_array
)
9558 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9559 returned_attrs
= decl_attributes (&type
,
9560 chainon (returned_attrs
, attrs
),
9564 if (declarator
->kind
== cdk_id
)
9567 inner_declarator
= declarator
->declarator
;
9569 switch (declarator
->kind
)
9572 type
= create_array_type_for_decl (dname
, type
,
9573 declarator
->u
.array
.bounds
);
9574 if (declarator
->std_attributes
)
9577 The optional attribute-specifier-seq appertains to the
9579 returned_attrs
= chainon (returned_attrs
,
9580 declarator
->std_attributes
);
9588 /* Declaring a function type.
9589 Make sure we have a valid type for the function to return. */
9591 if (type_quals
!= TYPE_UNQUALIFIED
)
9593 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9594 warning (OPT_Wignored_qualifiers
,
9595 "type qualifiers ignored on function return type");
9596 /* We now know that the TYPE_QUALS don't apply to the
9597 decl, but to its return type. */
9598 type_quals
= TYPE_UNQUALIFIED
;
9600 errmsg
= targetm
.invalid_return_type (type
);
9604 type
= integer_type_node
;
9607 /* Error about some types functions can't return. */
9609 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9611 error ("%qs declared as function returning a function", name
);
9612 return error_mark_node
;
9614 if (TREE_CODE (type
) == ARRAY_TYPE
)
9616 error ("%qs declared as function returning an array", name
);
9617 return error_mark_node
;
9620 input_location
= declspecs
->locations
[ds_type_spec
];
9621 abstract_virtuals_error (ACU_RETURN
, type
);
9622 input_location
= saved_loc
;
9624 /* Pick up type qualifiers which should be applied to `this'. */
9625 memfn_quals
= declarator
->u
.function
.qualifiers
;
9626 /* Pick up virt-specifiers. */
9627 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9628 /* And ref-qualifier, too */
9629 rqual
= declarator
->u
.function
.ref_qualifier
;
9630 /* Pick up the exception specifications. */
9631 raises
= declarator
->u
.function
.exception_specification
;
9632 /* If the exception-specification is ill-formed, let's pretend
9633 there wasn't one. */
9634 if (raises
== error_mark_node
)
9637 /* Say it's a definition only for the CALL_EXPR
9638 closest to the identifier. */
9639 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9641 /* Handle a late-specified return type. */
9644 if (type_uses_auto (type
))
9646 if (!declarator
->u
.function
.late_return_type
)
9648 if (current_class_type
9649 && LAMBDA_TYPE_P (current_class_type
))
9650 /* OK for C++11 lambdas. */;
9651 else if (cxx_dialect
< cxx14
)
9653 error ("%qs function uses "
9654 "%<auto%> type specifier without trailing "
9655 "return type", name
);
9656 inform (input_location
, "deduced return type "
9657 "only available with -std=c++14 or "
9662 error ("virtual function cannot "
9663 "have deduced return type");
9667 else if (!is_auto (type
))
9669 error ("%qs function with trailing return type has"
9670 " %qT as its type rather than plain %<auto%>",
9672 return error_mark_node
;
9675 else if (declarator
->u
.function
.late_return_type
)
9677 if (cxx_dialect
< cxx11
)
9678 /* Not using maybe_warn_cpp0x because this should
9679 always be an error. */
9680 error ("trailing return type only available with "
9681 "-std=c++11 or -std=gnu++11");
9683 error ("%qs function with trailing return type not "
9684 "declared with %<auto%> type specifier", name
);
9685 return error_mark_node
;
9688 type
= splice_late_return_type
9689 (type
, declarator
->u
.function
.late_return_type
);
9690 if (type
== error_mark_node
)
9691 return error_mark_node
;
9693 if (declarator
->u
.function
.late_return_type
)
9694 late_return_type_p
= true;
9696 if (ctype
== NULL_TREE
9697 && decl_context
== FIELD
9700 ctype
= current_class_type
;
9702 if (ctype
&& (sfk
== sfk_constructor
9703 || sfk
== sfk_destructor
))
9705 /* We are within a class's scope. If our declarator name
9706 is the same as the class name, and we are defining
9707 a function, then it is a constructor/destructor, and
9708 therefore returns a void type. */
9710 /* ISO C++ 12.4/2. A destructor may not be declared
9711 const or volatile. A destructor may not be static.
9712 A destructor may not be declared with ref-qualifier.
9714 ISO C++ 12.1. A constructor may not be declared
9715 const or volatile. A constructor may not be
9716 virtual. A constructor may not be static.
9717 A constructor may not be declared with ref-qualifier. */
9719 error ((flags
== DTOR_FLAG
)
9720 ? G_("destructor cannot be static member function")
9721 : G_("constructor cannot be static member function"));
9724 error ((flags
== DTOR_FLAG
)
9725 ? G_("destructors may not be cv-qualified")
9726 : G_("constructors may not be cv-qualified"));
9727 memfn_quals
= TYPE_UNQUALIFIED
;
9732 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9733 error ((flags
== DTOR_FLAG
)
9734 ? "destructors may not be ref-qualified"
9735 : "constructors may not be ref-qualified");
9736 rqual
= REF_QUAL_NONE
;
9739 if (decl_context
== FIELD
9740 && !member_function_or_else (ctype
,
9743 return error_mark_node
;
9745 if (flags
!= DTOR_FLAG
)
9747 /* It's a constructor. */
9752 permerror (input_location
, "constructors cannot be declared virtual");
9755 if (decl_context
== FIELD
9756 && sfk
!= sfk_constructor
)
9757 return error_mark_node
;
9759 if (decl_context
== FIELD
)
9766 /* Cannot be both friend and virtual. */
9767 error ("virtual functions cannot be friends");
9770 if (decl_context
== NORMAL
)
9771 error ("friend declaration not in class definition");
9772 if (current_function_decl
&& funcdef_flag
)
9773 error ("can%'t define friend function %qs in a local "
9777 else if (ctype
&& sfk
== sfk_conversion
)
9781 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9786 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9789 if (inner_declarator
9790 && inner_declarator
->kind
== cdk_id
9791 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9792 && arg_types
!= void_list_node
)
9794 error ("destructors may not have parameters");
9795 arg_types
= void_list_node
;
9799 type
= build_function_type (type
, arg_types
);
9800 if (declarator
->std_attributes
)
9803 The optional attribute-specifier-seq appertains to
9804 the function type. */
9805 decl_attributes (&type
, declarator
->std_attributes
,
9813 /* Filter out pointers-to-references and references-to-references.
9814 We can get these if a TYPE_DECL is used. */
9816 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9818 if (declarator
->kind
!= cdk_reference
)
9820 error ("cannot declare pointer to %q#T", type
);
9821 type
= TREE_TYPE (type
);
9824 /* In C++0x, we allow reference to reference declarations
9825 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9826 and template type arguments [14.3.1/4 temp.arg.type]. The
9827 check for direct reference to reference declarations, which
9828 are still forbidden, occurs below. Reasoning behind the change
9829 can be found in DR106, DR540, and the rvalue reference
9831 else if (cxx_dialect
== cxx98
)
9833 error ("cannot declare reference to %q#T", type
);
9834 type
= TREE_TYPE (type
);
9837 else if (VOID_TYPE_P (type
))
9839 if (declarator
->kind
== cdk_reference
)
9840 error ("cannot declare reference to %q#T", type
);
9841 else if (declarator
->kind
== cdk_ptrmem
)
9842 error ("cannot declare pointer to %q#T member", type
);
9845 /* We now know that the TYPE_QUALS don't apply to the decl,
9846 but to the target of the pointer. */
9847 type_quals
= TYPE_UNQUALIFIED
;
9849 /* This code used to handle METHOD_TYPE, but I don't think it's
9850 possible to get it here anymore. */
9851 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9852 if (declarator
->kind
== cdk_ptrmem
9853 && TREE_CODE (type
) == FUNCTION_TYPE
)
9855 memfn_quals
|= type_memfn_quals (type
);
9856 type
= build_memfn_type (type
,
9857 declarator
->u
.pointer
.class_type
,
9860 if (type
== error_mark_node
)
9861 return error_mark_node
;
9863 rqual
= REF_QUAL_NONE
;
9864 memfn_quals
= TYPE_UNQUALIFIED
;
9867 if (TREE_CODE (type
) == FUNCTION_TYPE
9868 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9869 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9870 error (declarator
->kind
== cdk_reference
9871 ? G_("cannot declare reference to qualified function type %qT")
9872 : G_("cannot declare pointer to qualified function type %qT"),
9875 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
9876 && (flag_iso
|| warn_vla
> 0))
9877 pedwarn (input_location
, OPT_Wvla
,
9878 declarator
->kind
== cdk_reference
9879 ? G_("reference to array of runtime bound")
9880 : G_("pointer to array of runtime bound"));
9882 /* When the pointed-to type involves components of variable size,
9883 care must be taken to ensure that the size evaluation code is
9884 emitted early enough to dominate all the possible later uses
9885 and late enough for the variables on which it depends to have
9888 This is expected to happen automatically when the pointed-to
9889 type has a name/declaration of it's own, but special attention
9890 is required if the type is anonymous.
9892 We handle the NORMAL and FIELD contexts here by inserting a
9893 dummy statement that just evaluates the size at a safe point
9894 and ensures it is not deferred until e.g. within a deeper
9895 conditional context (c++/43555).
9897 We expect nothing to be needed here for PARM or TYPENAME.
9898 Evaluating the size at this point for TYPENAME would
9899 actually be incorrect, as we might be in the middle of an
9900 expression with side effects on the pointed-to type size
9901 "arguments" prior to the pointer declaration point and the
9902 size evaluation could end up prior to the side effects. */
9904 if (!TYPE_NAME (type
)
9905 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9906 && at_function_scope_p ()
9907 && variably_modified_type_p (type
, NULL_TREE
))
9908 /* Force evaluation of the SAVE_EXPR. */
9909 finish_expr_stmt (TYPE_SIZE (type
));
9911 if (declarator
->kind
== cdk_reference
)
9913 /* In C++0x, the type we are creating a reference to might be
9914 a typedef which is itself a reference type. In that case,
9915 we follow the reference collapsing rules in
9916 [7.1.3/8 dcl.typedef] to create the final reference type:
9918 "If a typedef TD names a type that is a reference to a type
9919 T, an attempt to create the type 'lvalue reference to cv TD'
9920 creates the type 'lvalue reference to T,' while an attempt
9921 to create the type "rvalue reference to cv TD' creates the
9924 if (VOID_TYPE_P (type
))
9925 /* We already gave an error. */;
9926 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9928 if (declarator
->u
.reference
.rvalue_ref
)
9929 /* Leave type alone. */;
9931 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9934 type
= cp_build_reference_type
9935 (type
, declarator
->u
.reference
.rvalue_ref
);
9937 /* In C++0x, we need this check for direct reference to
9938 reference declarations, which are forbidden by
9939 [8.3.2/5 dcl.ref]. Reference to reference declarations
9940 are only allowed indirectly through typedefs and template
9941 type arguments. Example:
9943 void foo(int & &); // invalid ref-to-ref decl
9945 typedef int & int_ref;
9946 void foo(int_ref &); // valid ref-to-ref decl
9948 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9949 error ("cannot declare reference to %q#T, which is not "
9950 "a typedef or a template type argument", type
);
9952 else if (TREE_CODE (type
) == METHOD_TYPE
)
9953 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9954 else if (declarator
->kind
== cdk_ptrmem
)
9956 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9958 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9959 /* We will already have complained. */
9960 type
= error_mark_node
;
9962 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9966 type
= build_pointer_type (type
);
9968 /* Process a list of type modifier keywords (such as
9969 const or volatile) that were given inside the `*' or `&'. */
9971 if (declarator
->u
.pointer
.qualifiers
)
9974 = cp_build_qualified_type (type
,
9975 declarator
->u
.pointer
.qualifiers
);
9976 type_quals
= cp_type_quals (type
);
9979 /* Apply C++11 attributes to the pointer, and not to the
9980 type pointed to. This is unlike what is done for GNU
9981 attributes above. It is to comply with [dcl.ptr]/1:
9983 [the optional attribute-specifier-seq (7.6.1) appertains
9984 to the pointer and not to the object pointed to]. */
9985 if (declarator
->std_attributes
)
9986 decl_attributes (&type
, declarator
->std_attributes
,
10000 /* A `constexpr' specifier used in an object declaration declares
10001 the object as `const'. */
10002 if (constexpr_p
&& innermost_code
!= cdk_function
)
10004 if (type_quals
& TYPE_QUAL_VOLATILE
)
10005 error ("both %<volatile%> and %<constexpr%> cannot be used here");
10006 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10008 type_quals
|= TYPE_QUAL_CONST
;
10009 type
= cp_build_qualified_type (type
, type_quals
);
10013 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10014 && TREE_CODE (type
) != FUNCTION_TYPE
10015 && TREE_CODE (type
) != METHOD_TYPE
10016 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10018 error ("template-id %qD used as a declarator",
10020 unqualified_id
= dname
;
10023 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10024 qualified with a class-name, turn it into a METHOD_TYPE, unless
10025 we know that the function is static. We take advantage of this
10026 opportunity to do other processing that pertains to entities
10027 explicitly declared to be class members. Note that if DECLARATOR
10028 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10029 would not have exited the loop above. */
10031 && declarator
->u
.id
.qualifying_scope
10032 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10034 ctype
= declarator
->u
.id
.qualifying_scope
;
10035 ctype
= TYPE_MAIN_VARIANT (ctype
);
10036 template_count
= num_template_headers_for_class (ctype
);
10038 if (ctype
== current_class_type
)
10042 permerror (input_location
, "member functions are implicitly friends of their class");
10046 permerror (declarator
->id_loc
,
10047 "extra qualification %<%T::%> on member %qs",
10050 else if (/* If the qualifying type is already complete, then we
10051 can skip the following checks. */
10052 !COMPLETE_TYPE_P (ctype
)
10053 && (/* If the function is being defined, then
10054 qualifying type must certainly be complete. */
10056 /* A friend declaration of "T::f" is OK, even if
10057 "T" is a template parameter. But, if this
10058 function is not a friend, the qualifying type
10059 must be a class. */
10060 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10061 /* For a declaration, the type need not be
10062 complete, if either it is dependent (since there
10063 is no meaningful definition of complete in that
10064 case) or the qualifying class is currently being
10066 || !(dependent_type_p (ctype
)
10067 || currently_open_class (ctype
)))
10068 /* Check that the qualifying type is complete. */
10069 && !complete_type_or_else (ctype
, NULL_TREE
))
10070 return error_mark_node
;
10071 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10073 if (current_class_type
10074 && (!friendp
|| funcdef_flag
))
10076 error (funcdef_flag
10077 ? G_("cannot define member function %<%T::%s%> "
10079 : G_("cannot declare member function %<%T::%s%> "
10081 ctype
, name
, current_class_type
);
10082 return error_mark_node
;
10085 else if (typedef_p
&& current_class_type
)
10087 error ("cannot declare member %<%T::%s%> within %qT",
10088 ctype
, name
, current_class_type
);
10089 return error_mark_node
;
10093 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10094 ctype
= current_class_type
;
10096 /* Now TYPE has the actual type. */
10098 if (returned_attrs
)
10101 *attrlist
= chainon (returned_attrs
, *attrlist
);
10103 attrlist
= &returned_attrs
;
10107 && declarator
->kind
== cdk_id
10108 && declarator
->std_attributes
)
10109 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10110 a declarator-id appertains to the entity that is declared. */
10111 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10113 /* Handle parameter packs. */
10114 if (parameter_pack_p
)
10116 if (decl_context
== PARM
)
10117 /* Turn the type into a pack expansion.*/
10118 type
= make_pack_expansion (type
);
10120 error ("non-parameter %qs cannot be a parameter pack", name
);
10123 /* Did array size calculations overflow or does the array cover more
10124 than half of the address-space? */
10125 if (TREE_CODE (type
) == ARRAY_TYPE
10126 && COMPLETE_TYPE_P (type
)
10127 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10128 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10130 error ("size of array %qs is too large", name
);
10131 /* If we proceed with the array type as it is, we'll eventually
10132 crash in tree_to_[su]hwi(). */
10133 type
= error_mark_node
;
10136 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10137 && !processing_template_decl
10138 && variably_modified_type_p (type
, NULL_TREE
))
10140 if (decl_context
== FIELD
)
10141 error ("data member may not have variably modified type %qT", type
);
10143 error ("parameter may not have variably modified type %qT", type
);
10144 type
= error_mark_node
;
10147 if (explicitp
== 1 || (explicitp
&& friendp
))
10149 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10150 in the declaration of a constructor or conversion function within
10151 a class definition. */
10152 if (!current_class_type
)
10153 error ("%<explicit%> outside class declaration");
10155 error ("%<explicit%> in friend declaration");
10157 error ("only declarations of constructors and conversion operators "
10158 "can be %<explicit%>");
10162 if (storage_class
== sc_mutable
)
10164 if (decl_context
!= FIELD
|| friendp
)
10166 error ("non-member %qs cannot be declared %<mutable%>", name
);
10167 storage_class
= sc_none
;
10169 else if (decl_context
== TYPENAME
|| typedef_p
)
10171 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10172 storage_class
= sc_none
;
10174 else if (TREE_CODE (type
) == FUNCTION_TYPE
10175 || TREE_CODE (type
) == METHOD_TYPE
)
10177 error ("function %qs cannot be declared %<mutable%>", name
);
10178 storage_class
= sc_none
;
10182 error ("static %qs cannot be declared %<mutable%>", name
);
10183 storage_class
= sc_none
;
10185 else if (type_quals
& TYPE_QUAL_CONST
)
10187 error ("const %qs cannot be declared %<mutable%>", name
);
10188 storage_class
= sc_none
;
10190 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10192 permerror (input_location
, "reference %qs cannot be declared "
10193 "%<mutable%>", name
);
10194 storage_class
= sc_none
;
10198 /* If this is declaring a typedef name, return a TYPE_DECL. */
10199 if (typedef_p
&& decl_context
!= TYPENAME
)
10203 /* Note that the grammar rejects storage classes
10204 in typenames, fields or parameters. */
10205 if (current_lang_name
== lang_name_java
)
10206 TYPE_FOR_JAVA (type
) = 1;
10208 /* This declaration:
10210 typedef void f(int) const;
10212 declares a function type which is not a member of any
10213 particular class, but which is cv-qualified; for
10214 example "f S::*" declares a pointer to a const-qualified
10215 member function of S. We record the cv-qualification in the
10217 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10219 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10221 /* We have now dealt with these qualifiers. */
10222 memfn_quals
= TYPE_UNQUALIFIED
;
10223 rqual
= REF_QUAL_NONE
;
10226 if (type_uses_auto (type
))
10228 error ("typedef declared %<auto%>");
10229 type
= error_mark_node
;
10232 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
10233 && (flag_iso
|| warn_vla
> 0))
10234 pedwarn (input_location
, OPT_Wvla
,
10235 "typedef naming array of runtime bound");
10237 if (decl_context
== FIELD
)
10238 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10240 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10241 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10242 error_at (DECL_SOURCE_LOCATION (decl
),
10243 "typedef name may not be a nested-name-specifier");
10244 TREE_TYPE (decl
) = error_mark_node
;
10247 if (decl_context
!= FIELD
)
10249 if (!current_function_decl
)
10250 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10251 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10252 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10253 (current_function_decl
)))
10254 /* The TYPE_DECL is "abstract" because there will be
10255 clones of this constructor/destructor, and there will
10256 be copies of this TYPE_DECL generated in those
10257 clones. The decloning optimization (for space) may
10258 revert this subsequently if it determines that
10259 the clones should share a common implementation. */
10260 DECL_ABSTRACT (decl
) = 1;
10262 else if (current_class_type
10263 && constructor_name_p (unqualified_id
, current_class_type
))
10264 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10265 "as enclosing class",
10268 /* If the user declares "typedef struct {...} foo" then the
10269 struct will have an anonymous name. Fill that name in now.
10270 Nothing can refer to it, so nothing needs know about the name
10272 if (type
!= error_mark_node
10274 && TYPE_NAME (type
)
10275 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10276 && TYPE_ANONYMOUS_P (type
)
10277 && declspecs
->type_definition_p
10278 && attributes_naming_typedef_ok (*attrlist
)
10279 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10283 /* Replace the anonymous name with the real name everywhere. */
10284 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10286 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10287 /* We do not rename the debug info representing the
10288 anonymous tagged type because the standard says in
10289 [dcl.typedef] that the naming applies only for
10290 linkage purposes. */
10291 /*debug_hooks->set_name (t, decl);*/
10292 TYPE_NAME (t
) = decl
;
10295 if (TYPE_LANG_SPECIFIC (type
))
10296 TYPE_WAS_ANONYMOUS (type
) = 1;
10298 /* If this is a typedef within a template class, the nested
10299 type is a (non-primary) template. The name for the
10300 template needs updating as well. */
10301 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10302 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10303 = TYPE_IDENTIFIER (type
);
10305 /* Adjust linkage now that we aren't anonymous anymore. */
10306 reset_type_linkage (type
);
10308 /* FIXME remangle member functions; member functions of a
10309 type with external linkage have external linkage. */
10313 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10314 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10316 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10317 memfn_quals
!= TYPE_UNQUALIFIED
,
10318 inlinep
, friendp
, raises
!= NULL_TREE
);
10320 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10321 /* Acknowledge that this was written:
10322 `using analias = atype;'. */
10323 TYPE_DECL_ALIAS_P (decl
) = 1;
10328 /* Detect the case of an array type of unspecified size
10329 which came, as such, direct from a typedef name.
10330 We must copy the type, so that the array's domain can be
10331 individually set by the object's initializer. */
10333 if (type
&& typedef_type
10334 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10335 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10336 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10338 /* Detect where we're using a typedef of function type to declare a
10339 function. PARMS will not be set, so we must create it now. */
10341 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10343 tree decls
= NULL_TREE
;
10346 for (args
= TYPE_ARG_TYPES (type
);
10347 args
&& args
!= void_list_node
;
10348 args
= TREE_CHAIN (args
))
10350 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10352 DECL_CHAIN (decl
) = decls
;
10356 parms
= nreverse (decls
);
10358 if (decl_context
!= TYPENAME
)
10360 /* The qualifiers on the function type become the qualifiers on
10361 the non-static member function. */
10362 memfn_quals
|= type_memfn_quals (type
);
10363 rqual
= type_memfn_rqual (type
);
10364 type_quals
= TYPE_UNQUALIFIED
;
10368 /* If this is a type name (such as, in a cast or sizeof),
10369 compute the type and return it now. */
10371 if (decl_context
== TYPENAME
)
10373 /* Note that the grammar rejects storage classes
10374 in typenames, fields or parameters. */
10375 if (type_quals
!= TYPE_UNQUALIFIED
)
10376 type_quals
= TYPE_UNQUALIFIED
;
10378 /* Special case: "friend class foo" looks like a TYPENAME context. */
10381 if (type_quals
!= TYPE_UNQUALIFIED
)
10383 error ("type qualifiers specified for friend class declaration");
10384 type_quals
= TYPE_UNQUALIFIED
;
10388 error ("%<inline%> specified for friend class declaration");
10394 /* Don't allow friend declaration without a class-key. */
10395 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10396 permerror (input_location
, "template parameters cannot be friends");
10397 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10398 permerror (input_location
, "friend declaration requires class-key, "
10399 "i.e. %<friend class %T::%D%>",
10400 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10402 permerror (input_location
, "friend declaration requires class-key, "
10403 "i.e. %<friend %#T%>",
10407 /* Only try to do this stuff if we didn't already give up. */
10408 if (type
!= integer_type_node
)
10410 /* A friendly class? */
10411 if (current_class_type
)
10412 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10413 /*complain=*/true);
10415 error ("trying to make class %qT a friend of global scope",
10418 type
= void_type_node
;
10421 else if (memfn_quals
|| rqual
)
10423 if (ctype
== NULL_TREE
10424 && TREE_CODE (type
) == METHOD_TYPE
)
10425 ctype
= TYPE_METHOD_BASETYPE (type
);
10428 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10429 /* Core issue #547: need to allow this in template type args.
10430 Allow it in general in C++11 for alias-declarations. */
10431 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10432 && TREE_CODE (type
) == FUNCTION_TYPE
)
10433 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10435 error ("invalid qualifiers on non-member function type");
10440 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10441 && decl_context
!= CATCHPARM
10442 && TREE_CODE (type
) != UNION_TYPE
10445 error ("abstract declarator %qT used as declaration", type
);
10446 return error_mark_node
;
10449 /* Only functions may be declared using an operator-function-id. */
10451 && IDENTIFIER_OPNAME_P (unqualified_id
)
10452 && TREE_CODE (type
) != FUNCTION_TYPE
10453 && TREE_CODE (type
) != METHOD_TYPE
)
10455 error ("declaration of %qD as non-function", unqualified_id
);
10456 return error_mark_node
;
10459 /* We don't check parameter types here because we can emit a better
10460 error message later. */
10461 if (decl_context
!= PARM
)
10463 type
= check_var_type (unqualified_id
, type
);
10464 if (type
== error_mark_node
)
10465 return error_mark_node
;
10468 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10469 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10471 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10473 if (ctype
|| in_namespace
)
10474 error ("cannot use %<::%> in parameter declaration");
10476 if (type_uses_auto (type
))
10478 if (cxx_dialect
>= cxx14
)
10479 error ("%<auto%> parameter not permitted in this context");
10481 error ("parameter declared %<auto%>");
10482 type
= error_mark_node
;
10485 /* A parameter declared as an array of T is really a pointer to T.
10486 One declared as a function is really a pointer to a function.
10487 One declared as a member is really a pointer to member. */
10489 if (TREE_CODE (type
) == ARRAY_TYPE
)
10491 /* Transfer const-ness of array into that of type pointed to. */
10492 type
= build_pointer_type (TREE_TYPE (type
));
10493 type_quals
= TYPE_UNQUALIFIED
;
10494 array_parameter_p
= true;
10496 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10497 type
= build_pointer_type (type
);
10500 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10501 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10503 cp_cv_quals real_quals
= memfn_quals
;
10504 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10505 real_quals
|= TYPE_QUAL_CONST
;
10506 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10512 if (decl_context
== PARM
)
10514 decl
= cp_build_parm_decl (unqualified_id
, type
);
10515 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10517 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10518 memfn_quals
!= TYPE_UNQUALIFIED
,
10519 inlinep
, friendp
, raises
!= NULL_TREE
);
10521 else if (decl_context
== FIELD
)
10523 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10524 && type_uses_auto (type
))
10526 error ("non-static data member declared %<auto%>");
10527 type
= error_mark_node
;
10530 /* The C99 flexible array extension. */
10531 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10532 && TYPE_DOMAIN (type
) == NULL_TREE
)
10534 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10535 tf_warning_or_error
);
10536 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10539 if (type
== error_mark_node
)
10541 /* Happens when declaring arrays of sizes which
10542 are error_mark_node, for example. */
10545 else if (in_namespace
&& !friendp
)
10547 /* Something like struct S { int N::j; }; */
10548 error ("invalid use of %<::%>");
10549 return error_mark_node
;
10551 else if (TREE_CODE (type
) == FUNCTION_TYPE
10552 || TREE_CODE (type
) == METHOD_TYPE
)
10555 tree function_context
;
10559 /* This should never happen in pure C++ (the check
10560 could be an assert). It could happen in
10561 Objective-C++ if someone writes invalid code that
10562 uses a function declaration for an instance
10563 variable or property (instance variables and
10564 properties are parsed as FIELD_DECLs, but they are
10565 part of an Objective-C class, not a C++ class).
10566 That code is invalid and is caught by this
10570 error ("declaration of function %qD in invalid context",
10572 return error_mark_node
;
10575 /* ``A union may [ ... ] not [ have ] virtual functions.''
10577 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10579 error ("function %qD declared virtual inside a union",
10581 return error_mark_node
;
10584 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10588 error ("%qD cannot be declared virtual, since it "
10589 "is always static",
10596 /* Check that the name used for a destructor makes sense. */
10597 if (sfk
== sfk_destructor
)
10599 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10603 gcc_assert (friendp
);
10604 error ("expected qualified name in friend declaration "
10605 "for destructor %qD", uqname
);
10606 return error_mark_node
;
10609 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10611 error ("declaration of %qD as member of %qT",
10613 return error_mark_node
;
10617 error ("a destructor cannot be %<constexpr%>");
10618 return error_mark_node
;
10621 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10623 error ("expected qualified name in friend declaration "
10624 "for constructor %qD",
10625 id_declarator
->u
.id
.unqualified_name
);
10626 return error_mark_node
;
10629 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10630 function_context
= (ctype
!= NULL_TREE
) ?
10631 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10632 publicp
= (! friendp
|| ! staticp
)
10633 && function_context
== NULL_TREE
;
10635 if (late_return_type_p
)
10636 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10638 decl
= grokfndecl (ctype
, type
,
10639 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10640 ? unqualified_id
: dname
,
10643 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10644 friendp
? -1 : 0, friendp
, publicp
,
10645 inlinep
| (2 * constexpr_p
),
10647 funcdef_flag
, template_count
, in_namespace
,
10648 attrlist
, declarator
->id_loc
);
10649 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10650 if (decl
== NULL_TREE
)
10651 return error_mark_node
;
10653 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10654 /* The decl and setting of decl_attr is also turned off. */
10655 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10658 /* [class.conv.ctor]
10660 A constructor declared without the function-specifier
10661 explicit that can be called with a single parameter
10662 specifies a conversion from the type of its first
10663 parameter to the type of its class. Such a constructor
10664 is called a converting constructor. */
10665 if (explicitp
== 2)
10666 DECL_NONCONVERTING_P (decl
) = 1;
10668 else if (!staticp
&& !dependent_type_p (type
)
10669 && !COMPLETE_TYPE_P (complete_type (type
))
10670 && (TREE_CODE (type
) != ARRAY_TYPE
10671 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10672 || initialized
== 0))
10674 if (unqualified_id
)
10676 error ("field %qD has incomplete type %qT",
10677 unqualified_id
, type
);
10678 cxx_incomplete_type_inform (strip_array_types (type
));
10681 error ("name %qT has incomplete type", type
);
10683 type
= error_mark_node
;
10690 error ("%qE is neither function nor member function; "
10691 "cannot be declared friend", unqualified_id
);
10699 /* Friends are treated specially. */
10700 if (ctype
== current_class_type
)
10701 ; /* We already issued a permerror. */
10702 else if (decl
&& DECL_NAME (decl
))
10704 if (template_class_depth (current_class_type
) == 0)
10706 decl
= check_explicit_specialization
10707 (unqualified_id
, decl
, template_count
,
10708 2 * funcdef_flag
+ 4);
10709 if (decl
== error_mark_node
)
10710 return error_mark_node
;
10713 decl
= do_friend (ctype
, unqualified_id
, decl
,
10719 return error_mark_node
;
10722 /* Structure field. It may not be a function, except for C++. */
10724 if (decl
== NULL_TREE
)
10728 /* C++ allows static class members. All other work
10729 for this is done by grokfield. */
10730 decl
= build_lang_decl_loc (declarator
10731 ? declarator
->id_loc
10733 VAR_DECL
, unqualified_id
, type
);
10734 set_linkage_for_static_data_member (decl
);
10735 /* Even if there is an in-class initialization, DECL
10736 is considered undefined until an out-of-class
10737 definition is provided. */
10738 DECL_EXTERNAL (decl
) = 1;
10742 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10743 if (declspecs
->gnu_thread_keyword_p
)
10744 DECL_GNU_TLS_P (decl
) = true;
10747 if (constexpr_p
&& !initialized
)
10749 error ("constexpr static data member %qD must have an "
10750 "initializer", decl
);
10751 constexpr_p
= false;
10758 error ("non-static data member %qE declared %<constexpr%>",
10760 constexpr_p
= false;
10762 decl
= build_decl (input_location
,
10763 FIELD_DECL
, unqualified_id
, type
);
10764 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10765 if (bitfield
&& !unqualified_id
)
10766 TREE_NO_WARNING (decl
) = 1;
10768 if (storage_class
== sc_mutable
)
10770 DECL_MUTABLE_P (decl
) = 1;
10771 storage_class
= sc_none
;
10776 /* An attempt is being made to initialize a non-static
10777 member. This is new in C++11. */
10778 maybe_warn_cpp0x (CPP0X_NSDMI
);
10780 /* If this has been parsed with static storage class, but
10781 errors forced staticp to be cleared, ensure NSDMI is
10783 if (declspecs
->storage_class
== sc_static
)
10784 DECL_INITIAL (decl
) = error_mark_node
;
10788 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10789 memfn_quals
!= TYPE_UNQUALIFIED
,
10790 inlinep
, friendp
, raises
!= NULL_TREE
);
10793 else if (TREE_CODE (type
) == FUNCTION_TYPE
10794 || TREE_CODE (type
) == METHOD_TYPE
)
10796 tree original_name
;
10799 if (!unqualified_id
)
10800 return error_mark_node
;
10802 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10803 original_name
= dname
;
10805 original_name
= unqualified_id
;
10807 if (storage_class
== sc_auto
)
10808 error ("storage class %<auto%> invalid for function %qs", name
);
10809 else if (storage_class
== sc_register
)
10810 error ("storage class %<register%> invalid for function %qs", name
);
10813 if (declspecs
->gnu_thread_keyword_p
)
10814 error ("storage class %<__thread%> invalid for function %qs",
10817 error ("storage class %<thread_local%> invalid for function %qs",
10821 if (virt_specifiers
)
10822 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10823 /* Function declaration not at top level.
10824 Storage classes other than `extern' are not allowed
10825 and `extern' makes no difference. */
10826 if (! toplevel_bindings_p ()
10827 && (storage_class
== sc_static
10828 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10831 if (storage_class
== sc_static
)
10832 pedwarn (input_location
, OPT_Wpedantic
,
10833 "%<static%> specified invalid for function %qs "
10834 "declared out of global scope", name
);
10836 pedwarn (input_location
, OPT_Wpedantic
,
10837 "%<inline%> specifier invalid for function %qs "
10838 "declared out of global scope", name
);
10841 if (ctype
== NULL_TREE
)
10845 error ("virtual non-class function %qs", name
);
10848 else if (sfk
== sfk_constructor
10849 || sfk
== sfk_destructor
)
10851 error (funcdef_flag
10852 ? G_("%qs defined in a non-class scope")
10853 : G_("%qs declared in a non-class scope"), name
);
10858 /* Record whether the function is public. */
10859 publicp
= (ctype
!= NULL_TREE
10860 || storage_class
!= sc_static
);
10862 if (late_return_type_p
)
10863 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10865 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10866 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10868 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10870 template_count
, in_namespace
, attrlist
,
10871 declarator
->id_loc
);
10872 if (decl
== NULL_TREE
)
10873 return error_mark_node
;
10877 int invalid_static
= 0;
10879 /* Don't allow a static member function in a class, and forbid
10880 declaring main to be static. */
10881 if (TREE_CODE (type
) == METHOD_TYPE
)
10883 permerror (input_location
, "cannot declare member function %qD to have "
10884 "static linkage", decl
);
10885 invalid_static
= 1;
10887 else if (current_function_decl
)
10889 /* FIXME need arm citation */
10890 error ("cannot declare static function inside another function");
10891 invalid_static
= 1;
10894 if (invalid_static
)
10897 storage_class
= sc_none
;
10903 /* It's a variable. */
10905 /* An uninitialized decl with `extern' is a reference. */
10906 decl
= grokvardecl (type
, dname
, unqualified_id
,
10909 (type_quals
& TYPE_QUAL_CONST
) != 0,
10911 ctype
? ctype
: in_namespace
);
10912 if (decl
== NULL_TREE
)
10913 return error_mark_node
;
10915 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10916 memfn_quals
!= TYPE_UNQUALIFIED
,
10917 inlinep
, friendp
, raises
!= NULL_TREE
);
10921 DECL_CONTEXT (decl
) = ctype
;
10924 permerror (input_location
, "%<static%> may not be used when defining "
10925 "(as opposed to declaring) a static data member");
10927 storage_class
= sc_none
;
10929 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10931 error ("static member %qD declared %<register%>", decl
);
10932 storage_class
= sc_none
;
10934 if (storage_class
== sc_extern
&& pedantic
)
10936 pedwarn (input_location
, OPT_Wpedantic
,
10937 "cannot explicitly declare member %q#D to have "
10938 "extern linkage", decl
);
10939 storage_class
= sc_none
;
10942 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10944 error ("declaration of constexpr variable %qD is not a definition",
10946 constexpr_p
= false;
10950 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10952 if (toplevel_bindings_p ())
10954 /* It's common practice (and completely valid) to have a const
10955 be initialized and declared extern. */
10956 if (!(type_quals
& TYPE_QUAL_CONST
))
10957 warning (0, "%qs initialized and declared %<extern%>", name
);
10961 error ("%qs has both %<extern%> and initializer", name
);
10962 return error_mark_node
;
10966 /* Record `register' declaration for warnings on &
10967 and in case doing stupid register allocation. */
10969 if (storage_class
== sc_register
)
10970 DECL_REGISTER (decl
) = 1;
10971 else if (storage_class
== sc_extern
)
10972 DECL_THIS_EXTERN (decl
) = 1;
10973 else if (storage_class
== sc_static
)
10974 DECL_THIS_STATIC (decl
) = 1;
10976 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10977 if (constexpr_p
&& VAR_P (decl
))
10978 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10980 /* Record constancy and volatility on the DECL itself . There's
10981 no need to do this when processing a template; we'll do this
10982 for the instantiated declaration based on the type of DECL. */
10983 if (!processing_template_decl
)
10984 cp_apply_type_quals_to_decl (type_quals
, decl
);
10990 /* Subroutine of start_function. Ensure that each of the parameter
10991 types (as listed in PARMS) is complete, as is required for a
10992 function definition. */
10995 require_complete_types_for_parms (tree parms
)
10997 for (; parms
; parms
= DECL_CHAIN (parms
))
10999 if (dependent_type_p (TREE_TYPE (parms
)))
11001 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11002 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11004 relayout_decl (parms
);
11005 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11008 /* grokparms or complete_type_or_else will have already issued
11010 TREE_TYPE (parms
) = error_mark_node
;
11014 /* Returns nonzero if T is a local variable. */
11017 local_variable_p (const_tree t
)
11020 /* A VAR_DECL with a context that is a _TYPE is a static data
11022 && !TYPE_P (CP_DECL_CONTEXT (t
))
11023 /* Any other non-local variable must be at namespace scope. */
11024 && !DECL_NAMESPACE_SCOPE_P (t
))
11025 || (TREE_CODE (t
) == PARM_DECL
))
11031 /* Like local_variable_p, but suitable for use as a tree-walking
11035 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11038 if (local_variable_p (*tp
)
11039 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11041 else if (TYPE_P (*tp
))
11042 *walk_subtrees
= 0;
11047 /* Check that ARG, which is a default-argument expression for a
11048 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11049 something goes wrong. DECL may also be a _TYPE node, rather than a
11050 DECL, if there is no DECL available. */
11053 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11058 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11059 /* We get a DEFAULT_ARG when looking at an in-class declaration
11060 with a default argument. Ignore the argument for now; we'll
11061 deal with it after the class is complete. */
11070 decl_type
= TREE_TYPE (decl
);
11072 if (arg
== error_mark_node
11073 || decl
== error_mark_node
11074 || TREE_TYPE (arg
) == error_mark_node
11075 || decl_type
== error_mark_node
)
11076 /* Something already went wrong. There's no need to check
11078 return error_mark_node
;
11080 /* [dcl.fct.default]
11082 A default argument expression is implicitly converted to the
11084 ++cp_unevaluated_operand
;
11085 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11087 --cp_unevaluated_operand
;
11089 if (warn_zero_as_null_pointer_constant
11090 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11091 && null_ptr_cst_p (arg
)
11092 && (complain
& tf_warning
)
11093 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11094 return nullptr_node
;
11096 /* [dcl.fct.default]
11098 Local variables shall not be used in default argument
11101 The keyword `this' shall not be used in a default argument of a
11102 member function. */
11103 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11106 if (complain
& tf_warning_or_error
)
11108 if (DECL_NAME (var
) == this_identifier
)
11109 permerror (input_location
, "default argument %qE uses %qD",
11112 error ("default argument %qE uses local variable %qD", arg
, var
);
11114 return error_mark_node
;
11121 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11124 type_is_deprecated (tree type
)
11126 enum tree_code code
;
11127 if (TREE_DEPRECATED (type
))
11129 if (TYPE_NAME (type
)
11130 && TREE_DEPRECATED (TYPE_NAME (type
)))
11133 /* Do warn about using typedefs to a deprecated class. */
11134 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11135 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11137 code
= TREE_CODE (type
);
11139 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11140 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11141 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11142 return type_is_deprecated (TREE_TYPE (type
));
11144 if (TYPE_PTRMEMFUNC_P (type
))
11145 return type_is_deprecated
11146 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11151 /* Decode the list of parameter types for a function type.
11152 Given the list of things declared inside the parens,
11153 return a list of types.
11155 If this parameter does not end with an ellipsis, we append
11158 *PARMS is set to the chain of PARM_DECLs created. */
11161 grokparms (tree parmlist
, tree
*parms
)
11163 tree result
= NULL_TREE
;
11164 tree decls
= NULL_TREE
;
11168 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11170 tree type
= NULL_TREE
;
11171 tree init
= TREE_PURPOSE (parm
);
11172 tree decl
= TREE_VALUE (parm
);
11173 const char *errmsg
;
11175 if (parm
== void_list_node
)
11178 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11181 type
= TREE_TYPE (decl
);
11182 if (VOID_TYPE_P (type
))
11184 if (same_type_p (type
, void_type_node
)
11186 && !DECL_NAME (decl
) && !result
11187 && TREE_CHAIN (parm
) == void_list_node
)
11188 /* DR 577: A parameter list consisting of a single
11189 unnamed parameter of non-dependent type 'void'. */
11191 else if (cv_qualified_p (type
))
11192 error_at (DECL_SOURCE_LOCATION (decl
),
11193 "invalid use of cv-qualified type %qT in "
11194 "parameter declaration", type
);
11196 error_at (DECL_SOURCE_LOCATION (decl
),
11197 "invalid use of type %<void%> in parameter "
11199 /* It's not a good idea to actually create parameters of
11200 type `void'; other parts of the compiler assume that a
11201 void type terminates the parameter list. */
11202 type
= error_mark_node
;
11203 TREE_TYPE (decl
) = error_mark_node
;
11206 if (type
!= error_mark_node
11207 && TYPE_FOR_JAVA (type
)
11208 && MAYBE_CLASS_TYPE_P (type
))
11210 error ("parameter %qD has Java class type", decl
);
11211 type
= error_mark_node
;
11212 TREE_TYPE (decl
) = error_mark_node
;
11216 if (type
!= error_mark_node
11217 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11220 type
= error_mark_node
;
11221 TREE_TYPE (decl
) = error_mark_node
;
11224 if (type
!= error_mark_node
)
11226 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11228 tree deptype
= type_is_deprecated (type
);
11230 warn_deprecated_use (deptype
, NULL_TREE
);
11233 /* Top-level qualifiers on the parameters are
11234 ignored for function types. */
11235 type
= cp_build_qualified_type (type
, 0);
11236 if (TREE_CODE (type
) == METHOD_TYPE
)
11238 error ("parameter %qD invalidly declared method type", decl
);
11239 type
= build_pointer_type (type
);
11240 TREE_TYPE (decl
) = type
;
11242 else if (abstract_virtuals_error (decl
, type
))
11243 any_error
= 1; /* Seems like a good idea. */
11244 else if (POINTER_TYPE_P (type
))
11246 /* [dcl.fct]/6, parameter types cannot contain pointers
11247 (references) to arrays of unknown bound. */
11248 tree t
= TREE_TYPE (type
);
11249 int ptr
= TYPE_PTR_P (type
);
11253 if (TYPE_PTR_P (t
))
11255 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11257 else if (!TYPE_DOMAIN (t
))
11261 if (TREE_CODE (t
) == ARRAY_TYPE
)
11263 ? G_("parameter %qD includes pointer to array of "
11264 "unknown bound %qT")
11265 : G_("parameter %qD includes reference to array of "
11266 "unknown bound %qT"),
11272 else if (init
&& !processing_template_decl
)
11273 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11276 DECL_CHAIN (decl
) = decls
;
11278 result
= tree_cons (init
, type
, result
);
11280 decls
= nreverse (decls
);
11281 result
= nreverse (result
);
11283 result
= chainon (result
, void_list_node
);
11290 /* D is a constructor or overloaded `operator='.
11292 Let T be the class in which D is declared. Then, this function
11295 -1 if D's is an ill-formed constructor or copy assignment operator
11296 whose first parameter is of type `T'.
11297 0 if D is not a copy constructor or copy assignment
11299 1 if D is a copy constructor or copy assignment operator whose
11300 first parameter is a reference to non-const qualified T.
11301 2 if D is a copy constructor or copy assignment operator whose
11302 first parameter is a reference to const qualified T.
11304 This function can be used as a predicate. Positive values indicate
11305 a copy constructor and nonzero values indicate a copy assignment
11309 copy_fn_p (const_tree d
)
11315 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11317 if (TREE_CODE (d
) == TEMPLATE_DECL
11318 || (DECL_TEMPLATE_INFO (d
)
11319 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11320 /* Instantiations of template member functions are never copy
11321 functions. Note that member functions of templated classes are
11322 represented as template functions internally, and we must
11323 accept those as copy functions. */
11326 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11330 arg_type
= TREE_VALUE (args
);
11331 if (arg_type
== error_mark_node
)
11334 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11336 /* Pass by value copy assignment operator. */
11339 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11340 && !TYPE_REF_IS_RVALUE (arg_type
)
11341 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11343 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11349 args
= TREE_CHAIN (args
);
11351 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11352 /* There are more non-optional args. */
11358 /* D is a constructor or overloaded `operator='.
11360 Let T be the class in which D is declared. Then, this function
11361 returns true when D is a move constructor or move assignment
11362 operator, false otherwise. */
11365 move_fn_p (const_tree d
)
11367 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11369 if (cxx_dialect
== cxx98
)
11370 /* There are no move constructors if we are in C++98 mode. */
11373 if (TREE_CODE (d
) == TEMPLATE_DECL
11374 || (DECL_TEMPLATE_INFO (d
)
11375 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11376 /* Instantiations of template member functions are never move
11377 functions. Note that member functions of templated classes are
11378 represented as template functions internally, and we must
11379 accept those as move functions. */
11382 return move_signature_fn_p (d
);
11385 /* D is a constructor or overloaded `operator='.
11387 Then, this function returns true when D has the same signature as a move
11388 constructor or move assignment operator (because either it is such a
11389 ctor/op= or it is a template specialization with the same signature),
11390 false otherwise. */
11393 move_signature_fn_p (const_tree d
)
11397 bool result
= false;
11399 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11403 arg_type
= TREE_VALUE (args
);
11404 if (arg_type
== error_mark_node
)
11407 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11408 && TYPE_REF_IS_RVALUE (arg_type
)
11409 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11413 args
= TREE_CHAIN (args
);
11415 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11416 /* There are more non-optional args. */
11422 /* Remember any special properties of member function DECL. */
11425 grok_special_member_properties (tree decl
)
11429 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11432 class_type
= DECL_CONTEXT (decl
);
11433 if (DECL_CONSTRUCTOR_P (decl
))
11435 int ctor
= copy_fn_p (decl
);
11437 if (!DECL_ARTIFICIAL (decl
))
11438 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11444 A non-template constructor for class X is a copy
11445 constructor if its first parameter is of type X&, const
11446 X&, volatile X& or const volatile X&, and either there
11447 are no other parameters or else all other parameters have
11448 default arguments. */
11449 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11450 if (user_provided_p (decl
))
11451 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11453 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11455 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11457 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11458 if (user_provided_p (decl
))
11459 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11461 else if (move_fn_p (decl
) && user_provided_p (decl
))
11462 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11463 else if (is_list_ctor (decl
))
11464 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11466 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11467 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11468 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11470 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11474 A non-template assignment operator for class X is a copy
11475 assignment operator if its parameter is of type X, X&, const
11476 X&, volatile X& or const volatile X&. */
11478 int assop
= copy_fn_p (decl
);
11482 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11483 if (user_provided_p (decl
))
11484 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11486 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11488 else if (move_fn_p (decl
) && user_provided_p (decl
))
11489 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11491 /* Destructors are handled in check_methods. */
11494 /* Check a constructor DECL has the correct form. Complains
11495 if the class has a constructor of the form X(X). */
11498 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11500 int ctor_parm
= copy_fn_p (decl
);
11506 A declaration of a constructor for a class X is ill-formed if
11507 its first parameter is of type (optionally cv-qualified) X
11508 and either there are no other parameters or else all other
11509 parameters have default arguments.
11511 We *don't* complain about member template instantiations that
11512 have this form, though; they can occur as we try to decide
11513 what constructor to use during overload resolution. Since
11514 overload resolution will never prefer such a constructor to
11515 the non-template copy constructor (which is either explicitly
11516 or implicitly defined), there's no need to worry about their
11517 existence. Theoretically, they should never even be
11518 instantiated, but that's hard to forestall. */
11519 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11527 /* An operator with this code is unary, but can also be binary. */
11530 ambi_op_p (enum tree_code code
)
11532 return (code
== INDIRECT_REF
11533 || code
== ADDR_EXPR
11534 || code
== UNARY_PLUS_EXPR
11535 || code
== NEGATE_EXPR
11536 || code
== PREINCREMENT_EXPR
11537 || code
== PREDECREMENT_EXPR
);
11540 /* An operator with this name can only be unary. */
11543 unary_op_p (enum tree_code code
)
11545 return (code
== TRUTH_NOT_EXPR
11546 || code
== BIT_NOT_EXPR
11547 || code
== COMPONENT_REF
11548 || code
== TYPE_EXPR
);
11551 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11552 errors are issued for invalid declarations. */
11555 grok_op_properties (tree decl
, bool complain
)
11557 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11559 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11560 tree name
= DECL_NAME (decl
);
11561 enum tree_code operator_code
;
11566 /* Count the number of arguments and check for ellipsis. */
11567 for (argtype
= argtypes
, arity
= 0;
11568 argtype
&& argtype
!= void_list_node
;
11569 argtype
= TREE_CHAIN (argtype
))
11571 ellipsis_p
= !argtype
;
11573 class_type
= DECL_CONTEXT (decl
);
11574 if (class_type
&& !CLASS_TYPE_P (class_type
))
11575 class_type
= NULL_TREE
;
11577 if (DECL_CONV_FN_P (decl
))
11578 operator_code
= TYPE_EXPR
;
11582 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11583 if (ansi_opname (CODE) == name) \
11585 operator_code = (CODE); \
11588 else if (ansi_assopname (CODE) == name) \
11590 operator_code = (CODE); \
11591 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11595 #include "operators.def"
11596 #undef DEF_OPERATOR
11598 gcc_unreachable ();
11601 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11602 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11605 switch (operator_code
)
11608 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11612 TYPE_GETS_DELETE (class_type
) |= 1;
11616 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11619 case VEC_DELETE_EXPR
:
11620 TYPE_GETS_DELETE (class_type
) |= 2;
11627 /* [basic.std.dynamic.allocation]/1:
11629 A program is ill-formed if an allocation function is declared
11630 in a namespace scope other than global scope or declared static
11633 The same also holds true for deallocation functions. */
11634 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11635 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11637 if (DECL_NAMESPACE_SCOPE_P (decl
))
11639 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11641 error ("%qD may not be declared within a namespace", decl
);
11644 else if (!TREE_PUBLIC (decl
))
11646 error ("%qD may not be declared as static", decl
);
11652 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11654 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11655 DECL_IS_OPERATOR_NEW (decl
) = 1;
11657 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11658 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11661 /* An operator function must either be a non-static member function
11662 or have at least one parameter of a class, a reference to a class,
11663 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11664 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11666 if (operator_code
== TYPE_EXPR
11667 || operator_code
== CALL_EXPR
11668 || operator_code
== COMPONENT_REF
11669 || operator_code
== ARRAY_REF
11670 || operator_code
== NOP_EXPR
)
11672 error ("%qD must be a nonstatic member function", decl
);
11679 if (DECL_STATIC_FUNCTION_P (decl
))
11681 error ("%qD must be either a non-static member "
11682 "function or a non-member function", decl
);
11686 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11688 tree arg
= non_reference (TREE_VALUE (p
));
11689 if (arg
== error_mark_node
)
11692 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11693 because these checks are performed even on
11694 template functions. */
11695 if (MAYBE_CLASS_TYPE_P (arg
)
11696 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11700 if (!p
|| p
== void_list_node
)
11703 error ("%qD must have an argument of class or "
11704 "enumerated type", decl
);
11710 /* There are no restrictions on the arguments to an overloaded
11712 if (operator_code
== CALL_EXPR
)
11715 /* Warn about conversion operators that will never be used. */
11716 if (IDENTIFIER_TYPENAME_P (name
)
11717 && ! DECL_TEMPLATE_INFO (decl
)
11719 /* Warn only declaring the function; there is no need to
11720 warn again about out-of-class definitions. */
11721 && class_type
== current_class_type
)
11723 tree t
= TREE_TYPE (name
);
11724 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11727 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11729 if (VOID_TYPE_P (t
))
11730 warning (OPT_Wconversion
,
11732 ? G_("conversion to a reference to void "
11733 "will never use a type conversion operator")
11734 : G_("conversion to void "
11735 "will never use a type conversion operator"));
11736 else if (class_type
)
11738 if (t
== class_type
)
11739 warning (OPT_Wconversion
,
11741 ? G_("conversion to a reference to the same type "
11742 "will never use a type conversion operator")
11743 : G_("conversion to the same type "
11744 "will never use a type conversion operator"));
11745 /* Don't force t to be complete here. */
11746 else if (MAYBE_CLASS_TYPE_P (t
)
11747 && COMPLETE_TYPE_P (t
)
11748 && DERIVED_FROM_P (t
, class_type
))
11749 warning (OPT_Wconversion
,
11751 ? G_("conversion to a reference to a base class "
11752 "will never use a type conversion operator")
11753 : G_("conversion to a base class "
11754 "will never use a type conversion operator"));
11759 if (operator_code
== COND_EXPR
)
11762 error ("ISO C++ prohibits overloading operator ?:");
11765 else if (ellipsis_p
)
11767 error ("%qD must not have variable number of arguments", decl
);
11770 else if (ambi_op_p (operator_code
))
11773 /* We pick the one-argument operator codes by default, so
11774 we don't have to change anything. */
11776 else if (arity
== 2)
11778 /* If we thought this was a unary operator, we now know
11779 it to be a binary operator. */
11780 switch (operator_code
)
11783 operator_code
= MULT_EXPR
;
11787 operator_code
= BIT_AND_EXPR
;
11790 case UNARY_PLUS_EXPR
:
11791 operator_code
= PLUS_EXPR
;
11795 operator_code
= MINUS_EXPR
;
11798 case PREINCREMENT_EXPR
:
11799 operator_code
= POSTINCREMENT_EXPR
;
11802 case PREDECREMENT_EXPR
:
11803 operator_code
= POSTDECREMENT_EXPR
;
11807 gcc_unreachable ();
11810 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11812 if ((operator_code
== POSTINCREMENT_EXPR
11813 || operator_code
== POSTDECREMENT_EXPR
)
11814 && ! processing_template_decl
11815 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11818 error ("postfix %qD must take %<int%> as its argument",
11821 error ("postfix %qD must take %<int%> as its second "
11829 error ("%qD must take either zero or one argument", decl
);
11831 error ("%qD must take either one or two arguments", decl
);
11835 /* More Effective C++ rule 6. */
11837 && (operator_code
== POSTINCREMENT_EXPR
11838 || operator_code
== POSTDECREMENT_EXPR
11839 || operator_code
== PREINCREMENT_EXPR
11840 || operator_code
== PREDECREMENT_EXPR
))
11842 tree arg
= TREE_VALUE (argtypes
);
11843 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11844 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11845 arg
= TREE_TYPE (arg
);
11846 arg
= TYPE_MAIN_VARIANT (arg
);
11847 if (operator_code
== PREINCREMENT_EXPR
11848 || operator_code
== PREDECREMENT_EXPR
)
11850 if (TREE_CODE (ret
) != REFERENCE_TYPE
11851 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11853 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11854 build_reference_type (arg
));
11858 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11859 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11863 else if (unary_op_p (operator_code
))
11868 error ("%qD must take %<void%>", decl
);
11870 error ("%qD must take exactly one argument", decl
);
11874 else /* if (binary_op_p (operator_code)) */
11879 error ("%qD must take exactly one argument", decl
);
11881 error ("%qD must take exactly two arguments", decl
);
11885 /* More Effective C++ rule 7. */
11887 && (operator_code
== TRUTH_ANDIF_EXPR
11888 || operator_code
== TRUTH_ORIF_EXPR
11889 || operator_code
== COMPOUND_EXPR
))
11890 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11894 /* Effective C++ rule 23. */
11897 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11898 && (operator_code
== PLUS_EXPR
11899 || operator_code
== MINUS_EXPR
11900 || operator_code
== TRUNC_DIV_EXPR
11901 || operator_code
== MULT_EXPR
11902 || operator_code
== TRUNC_MOD_EXPR
)
11903 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11904 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11906 /* [over.oper]/8 */
11907 for (; argtypes
&& argtypes
!= void_list_node
;
11908 argtypes
= TREE_CHAIN (argtypes
))
11909 if (TREE_PURPOSE (argtypes
))
11911 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11912 if (operator_code
== POSTINCREMENT_EXPR
11913 || operator_code
== POSTDECREMENT_EXPR
)
11915 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11920 error ("%qD cannot have default arguments", decl
);
11928 /* Return a string giving the keyword associate with CODE. */
11930 static const char *
11931 tag_name (enum tag_types code
)
11943 case typename_type
:
11946 gcc_unreachable ();
11950 /* Name lookup in an elaborated-type-specifier (after the keyword
11951 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11952 elaborated-type-specifier is invalid, issue a diagnostic and return
11953 error_mark_node; otherwise, return the *_TYPE to which it referred.
11954 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11957 check_elaborated_type_specifier (enum tag_types tag_code
,
11959 bool allow_template_p
)
11965 struct S { struct S *p; };
11967 name lookup will find the TYPE_DECL for the implicit "S::S"
11968 typedef. Adjust for that here. */
11969 if (DECL_SELF_REFERENCE_P (decl
))
11970 decl
= TYPE_NAME (TREE_TYPE (decl
));
11972 type
= TREE_TYPE (decl
);
11974 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11975 is false for this case as well. */
11976 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11978 error ("using template type parameter %qT after %qs",
11979 type
, tag_name (tag_code
));
11980 return error_mark_node
;
11982 /* Accept template template parameters. */
11983 else if (allow_template_p
11984 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11985 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11989 If the identifier resolves to a typedef-name or the
11990 simple-template-id resolves to an alias template
11991 specialization, the elaborated-type-specifier is ill-formed.
11993 In other words, the only legitimate declaration to use in the
11994 elaborated type specifier is the implicit typedef created when
11995 the type is declared. */
11996 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11997 && !DECL_SELF_REFERENCE_P (decl
)
11998 && tag_code
!= typename_type
)
12000 if (alias_template_specialization_p (type
))
12001 error ("using alias template specialization %qT after %qs",
12002 type
, tag_name (tag_code
));
12004 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12005 inform (DECL_SOURCE_LOCATION (decl
),
12006 "%qD has a previous declaration here", decl
);
12007 return error_mark_node
;
12009 else if (TREE_CODE (type
) != RECORD_TYPE
12010 && TREE_CODE (type
) != UNION_TYPE
12011 && tag_code
!= enum_type
12012 && tag_code
!= typename_type
)
12014 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12015 inform (input_location
, "%q+T has a previous declaration here", type
);
12016 return error_mark_node
;
12018 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12019 && tag_code
== enum_type
)
12021 error ("%qT referred to as enum", type
);
12022 inform (input_location
, "%q+T has a previous declaration here", type
);
12023 return error_mark_node
;
12025 else if (!allow_template_p
12026 && TREE_CODE (type
) == RECORD_TYPE
12027 && CLASSTYPE_IS_TEMPLATE (type
))
12029 /* If a class template appears as elaborated type specifier
12030 without a template header such as:
12032 template <class T> class C {};
12033 void f(class C); // No template header here
12035 then the required template argument is missing. */
12036 error ("template argument required for %<%s %T%>",
12037 tag_name (tag_code
),
12038 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12039 return error_mark_node
;
12045 /* Lookup NAME in elaborate type specifier in scope according to
12046 SCOPE and issue diagnostics if necessary.
12047 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12048 found, and ERROR_MARK_NODE for type error. */
12051 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12052 tag_scope scope
, bool template_header_p
)
12056 if (scope
== ts_global
)
12058 /* First try ordinary name lookup, ignoring hidden class name
12059 injected via friend declaration. */
12060 decl
= lookup_name_prefer_type (name
, 2);
12061 /* If that fails, the name will be placed in the smallest
12062 non-class, non-function-prototype scope according to 3.3.1/5.
12063 We may already have a hidden name declared as friend in this
12064 scope. So lookup again but not ignoring hidden names.
12065 If we find one, that name will be made visible rather than
12066 creating a new tag. */
12068 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12071 decl
= lookup_type_scope (name
, scope
);
12074 && (DECL_CLASS_TEMPLATE_P (decl
)
12075 /* If scope is ts_current we're defining a class, so ignore a
12076 template template parameter. */
12077 || (scope
!= ts_current
12078 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12079 decl
= DECL_TEMPLATE_RESULT (decl
);
12081 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12083 /* Look for invalid nested type:
12087 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12089 error ("%qD has the same name as the class in which it is "
12092 return error_mark_node
;
12095 /* Two cases we need to consider when deciding if a class
12096 template is allowed as an elaborated type specifier:
12097 1. It is a self reference to its own class.
12098 2. It comes with a template header.
12102 template <class T> class C {
12103 class C *c1; // DECL_SELF_REFERENCE_P is true
12106 template <class U> class C; // template_header_p is true
12107 template <class T> class C<T>::D {
12108 class C *c2; // DECL_SELF_REFERENCE_P is true
12111 t
= check_elaborated_type_specifier (tag_code
,
12114 | DECL_SELF_REFERENCE_P (decl
));
12117 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12119 error ("reference to %qD is ambiguous", name
);
12120 print_candidates (decl
);
12121 return error_mark_node
;
12127 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12128 Define the tag as a forward-reference if it is not defined.
12130 If a declaration is given, process it here, and report an error if
12131 multiple declarations are not identical.
12133 SCOPE is TS_CURRENT when this is also a definition. Only look in
12134 the current frame for the name (since C++ allows new names in any
12135 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12136 declaration. Only look beginning from the current scope outward up
12137 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12139 TEMPLATE_HEADER_P is true when this declaration is preceded by
12140 a set of template parameters. */
12143 xref_tag_1 (enum tag_types tag_code
, tree name
,
12144 tag_scope orig_scope
, bool template_header_p
)
12146 enum tree_code code
;
12148 tree context
= NULL_TREE
;
12151 gcc_assert (identifier_p (name
));
12157 code
= RECORD_TYPE
;
12163 code
= ENUMERAL_TYPE
;
12166 gcc_unreachable ();
12169 if (orig_scope
== ts_lambda
)
12170 scope
= ts_current
;
12172 scope
= orig_scope
;
12174 /* In case of anonymous name, xref_tag is only called to
12175 make type node and push name. Name lookup is not required. */
12176 if (ANON_AGGRNAME_P (name
))
12179 t
= lookup_and_check_tag (tag_code
, name
,
12180 scope
, template_header_p
);
12182 if (t
== error_mark_node
)
12183 return error_mark_node
;
12185 if (scope
!= ts_current
&& t
&& current_class_type
12186 && template_class_depth (current_class_type
)
12187 && template_header_p
)
12189 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12192 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12193 definition of this tag. Since, in addition, we are currently
12194 processing a (member) template declaration of a template
12195 class, we must be very careful; consider:
12202 { template <class V>
12203 friend struct S1; };
12205 Here, the S2::S1 declaration should not be confused with the
12206 outer declaration. In particular, the inner version should
12207 have a template parameter of level 2, not level 1. This
12208 would be particularly important if the member declaration
12211 template <class V = U> friend struct S1;
12213 say, when we should tsubst into `U' when instantiating
12214 S2. On the other hand, when presented with:
12224 we must find the inner binding eventually. We
12225 accomplish this by making sure that the new type we
12226 create to represent this declaration has the right
12228 context
= TYPE_CONTEXT (t
);
12234 /* If no such tag is yet defined, create a forward-reference node
12235 and record it as the "definition".
12236 When a real declaration of this type is found,
12237 the forward-reference will be altered into a real type. */
12238 if (code
== ENUMERAL_TYPE
)
12240 error ("use of enum %q#D without previous declaration", name
);
12241 return error_mark_node
;
12245 t
= make_class_type (code
);
12246 TYPE_CONTEXT (t
) = context
;
12247 if (orig_scope
== ts_lambda
)
12248 /* Remember that we're declaring a lambda to avoid bogus errors
12249 in push_template_decl. */
12250 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12251 t
= pushtag (name
, t
, scope
);
12256 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12258 if (!redeclare_class_template (t
, current_template_parms
))
12259 return error_mark_node
;
12261 else if (!processing_template_decl
12262 && CLASS_TYPE_P (t
)
12263 && CLASSTYPE_IS_TEMPLATE (t
))
12265 error ("redeclaration of %qT as a non-template", t
);
12266 error ("previous declaration %q+D", t
);
12267 return error_mark_node
;
12270 /* Make injected friend class visible. */
12271 if (scope
!= ts_within_enclosing_non_class
12272 && hidden_name_p (TYPE_NAME (t
)))
12274 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12275 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12277 if (TYPE_TEMPLATE_INFO (t
))
12279 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12280 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12288 /* Wrapper for xref_tag_1. */
12291 xref_tag (enum tag_types tag_code
, tree name
,
12292 tag_scope scope
, bool template_header_p
)
12296 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12297 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12298 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12304 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12306 enum tag_types tag_kind
;
12308 if (TREE_CODE (old
) == RECORD_TYPE
)
12309 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12311 tag_kind
= union_type
;
12313 if (id
== NULL_TREE
)
12314 id
= TYPE_IDENTIFIER (old
);
12316 return xref_tag (tag_kind
, id
, scope
, false);
12319 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12320 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12321 access_* node, and the TREE_VALUE is the type of the base-class.
12322 Non-NULL TREE_TYPE indicates virtual inheritance.
12324 Returns true if the binfo hierarchy was successfully created,
12325 false if an error was detected. */
12328 xref_basetypes (tree ref
, tree base_list
)
12331 tree binfo
, base_binfo
;
12332 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12333 unsigned max_bases
= 0; /* Maximum direct bases. */
12335 tree default_access
;
12336 tree igo_prev
; /* Track Inheritance Graph Order. */
12338 if (ref
== error_mark_node
)
12341 /* The base of a derived class is private by default, all others are
12343 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12344 && CLASSTYPE_DECLARED_CLASS (ref
)
12345 ? access_private_node
: access_public_node
);
12347 /* First, make sure that any templates in base-classes are
12348 instantiated. This ensures that if we call ourselves recursively
12349 we do not get confused about which classes are marked and which
12351 basep
= &base_list
;
12354 tree basetype
= TREE_VALUE (*basep
);
12356 /* The dependent_type_p call below should really be dependent_scope_p
12357 so that we give a hard error about using an incomplete type as a
12358 base, but we allow it with a pedwarn for backward
12360 if (processing_template_decl
12361 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12362 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12363 if (!dependent_type_p (basetype
)
12364 && !complete_type_or_else (basetype
, NULL
))
12365 /* An incomplete type. Remove it from the list. */
12366 *basep
= TREE_CHAIN (*basep
);
12370 if (TREE_TYPE (*basep
))
12372 if (CLASS_TYPE_P (basetype
))
12373 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12374 basep
= &TREE_CHAIN (*basep
);
12378 TYPE_MARKED_P (ref
) = 1;
12380 /* The binfo slot should be empty, unless this is an (ill-formed)
12382 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12384 error ("redefinition of %q#T", ref
);
12388 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12390 binfo
= make_tree_binfo (max_bases
);
12392 TYPE_BINFO (ref
) = binfo
;
12393 BINFO_OFFSET (binfo
) = size_zero_node
;
12394 BINFO_TYPE (binfo
) = ref
;
12396 /* Apply base-class info set up to the variants of this type. */
12397 fixup_type_variants (ref
);
12401 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12402 /* An aggregate cannot have baseclasses. */
12403 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12405 if (TREE_CODE (ref
) == UNION_TYPE
)
12407 error ("derived union %qT invalid", ref
);
12414 if (TYPE_FOR_JAVA (ref
))
12416 error ("Java class %qT cannot have multiple bases", ref
);
12423 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12425 if (TYPE_FOR_JAVA (ref
))
12427 error ("Java class %qT cannot have virtual bases", ref
);
12432 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12434 tree access
= TREE_PURPOSE (base_list
);
12435 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12436 tree basetype
= TREE_VALUE (base_list
);
12438 if (access
== access_default_node
)
12439 access
= default_access
;
12441 if (PACK_EXPANSION_P (basetype
))
12442 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12443 if (TREE_CODE (basetype
) == TYPE_DECL
)
12444 basetype
= TREE_TYPE (basetype
);
12445 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12447 error ("base type %qT fails to be a struct or class type",
12452 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12453 TYPE_FOR_JAVA (ref
) = 1;
12455 base_binfo
= NULL_TREE
;
12456 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12458 base_binfo
= TYPE_BINFO (basetype
);
12459 /* The original basetype could have been a typedef'd type. */
12460 basetype
= BINFO_TYPE (base_binfo
);
12462 /* Inherit flags from the base. */
12463 TYPE_HAS_NEW_OPERATOR (ref
)
12464 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12465 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12466 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12467 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12468 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12469 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12470 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12471 CLASSTYPE_REPEATED_BASE_P (ref
)
12472 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12475 /* We must do this test after we've seen through a typedef
12477 if (TYPE_MARKED_P (basetype
))
12479 if (basetype
== ref
)
12480 error ("recursive type %qT undefined", basetype
);
12482 error ("duplicate base type %qT invalid", basetype
);
12486 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12487 /* Regenerate the pack expansion for the bases. */
12488 basetype
= make_pack_expansion (basetype
);
12490 TYPE_MARKED_P (basetype
) = 1;
12492 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12493 &igo_prev
, via_virtual
);
12494 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12495 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12497 BINFO_BASE_APPEND (binfo
, base_binfo
);
12498 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12501 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12502 /* If we didn't get max_vbases vbases, we must have shared at
12503 least one of them, and are therefore diamond shaped. */
12504 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12506 /* Unmark all the types. */
12507 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12508 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12509 TYPE_MARKED_P (ref
) = 0;
12511 /* Now see if we have a repeated base type. */
12512 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12514 for (base_binfo
= binfo
; base_binfo
;
12515 base_binfo
= TREE_CHAIN (base_binfo
))
12517 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12519 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12522 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12524 for (base_binfo
= binfo
; base_binfo
;
12525 base_binfo
= TREE_CHAIN (base_binfo
))
12526 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12527 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12536 /* Copies the enum-related properties from type SRC to type DST.
12537 Used with the underlying type of an enum and the enum itself. */
12539 copy_type_enum (tree dst
, tree src
)
12542 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12544 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12545 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12546 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12547 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12548 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12549 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12550 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12551 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12552 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12556 /* Begin compiling the definition of an enumeration type.
12559 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12561 UNDERLYING_TYPE is the type that will be used as the storage for
12562 the enumeration type. This should be NULL_TREE if no storage type
12565 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12567 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12569 Returns the type object, as yet incomplete.
12570 Also records info about it so that build_enumerator
12571 may be used to declare the individual values as they are read. */
12574 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12575 bool scoped_enum_p
, bool *is_new
)
12577 tree prevtype
= NULL_TREE
;
12578 gcc_assert (identifier_p (name
));
12582 /* [C++0x dcl.enum]p5:
12584 If not explicitly specified, the underlying type of a scoped
12585 enumeration type is int. */
12586 if (!underlying_type
&& scoped_enum_p
)
12587 underlying_type
= integer_type_node
;
12589 if (underlying_type
)
12590 underlying_type
= cv_unqualified (underlying_type
);
12592 /* If this is the real definition for a previous forward reference,
12593 fill in the contents in the same object that used to be the
12594 forward reference. */
12596 enumtype
= lookup_and_check_tag (enum_type
, name
,
12597 /*tag_scope=*/ts_current
,
12598 /*template_header_p=*/false);
12600 /* In case of a template_decl, the only check that should be deferred
12601 to instantiation time is the comparison of underlying types. */
12602 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12604 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12606 error_at (input_location
, "scoped/unscoped mismatch "
12607 "in enum %q#T", enumtype
);
12608 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12609 "previous definition here");
12610 enumtype
= error_mark_node
;
12612 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12614 error_at (input_location
, "underlying type mismatch "
12615 "in enum %q#T", enumtype
);
12616 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12617 "previous definition here");
12618 enumtype
= error_mark_node
;
12620 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12621 && !dependent_type_p (underlying_type
)
12622 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12623 && !same_type_p (underlying_type
,
12624 ENUM_UNDERLYING_TYPE (enumtype
)))
12626 error_at (input_location
, "different underlying type "
12627 "in enum %q#T", enumtype
);
12628 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12629 "previous definition here");
12630 underlying_type
= NULL_TREE
;
12634 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12635 || processing_template_decl
)
12637 /* In case of error, make a dummy enum to allow parsing to
12639 if (enumtype
== error_mark_node
)
12641 name
= make_anon_name ();
12642 enumtype
= NULL_TREE
;
12645 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12646 of an opaque enum, or an opaque enum of an already defined
12647 enumeration (C++0x only).
12648 In any other case, it'll be NULL_TREE. */
12654 prevtype
= enumtype
;
12656 /* Do not push the decl more than once, unless we need to
12657 compare underlying types at instantiation time */
12659 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12660 || (underlying_type
12661 && dependent_type_p (underlying_type
))
12662 || (ENUM_UNDERLYING_TYPE (enumtype
)
12663 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12665 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12666 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12669 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12672 if (enumtype
== error_mark_node
)
12673 return error_mark_node
;
12675 /* The enum is considered opaque until the opening '{' of the
12676 enumerator list. */
12677 SET_OPAQUE_ENUM_P (enumtype
, true);
12678 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12681 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12683 if (underlying_type
)
12685 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12687 copy_type_enum (enumtype
, underlying_type
);
12688 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12690 else if (dependent_type_p (underlying_type
))
12691 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12693 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12694 underlying_type
, enumtype
);
12697 /* If into a template class, the returned enum is always the first
12698 declaration (opaque or not) seen. This way all the references to
12699 this type will be to the same declaration. The following ones are used
12700 only to check for definition errors. */
12701 if (prevtype
&& processing_template_decl
)
12707 /* After processing and defining all the values of an enumeration type,
12708 install their decls in the enumeration type.
12709 ENUMTYPE is the type object. */
12712 finish_enum_value_list (tree enumtype
)
12715 tree underlying_type
;
12718 tree minnode
, maxnode
;
12721 bool fixed_underlying_type_p
12722 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12724 /* We built up the VALUES in reverse order. */
12725 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12727 /* For an enum defined in a template, just set the type of the values;
12728 all further processing is postponed until the template is
12729 instantiated. We need to set the type so that tsubst of a CONST_DECL
12731 if (processing_template_decl
)
12733 for (values
= TYPE_VALUES (enumtype
);
12735 values
= TREE_CHAIN (values
))
12736 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12740 /* Determine the minimum and maximum values of the enumerators. */
12741 if (TYPE_VALUES (enumtype
))
12743 minnode
= maxnode
= NULL_TREE
;
12745 for (values
= TYPE_VALUES (enumtype
);
12747 values
= TREE_CHAIN (values
))
12749 decl
= TREE_VALUE (values
);
12751 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12752 each enumerator has the type of its enumeration. Prior to the
12753 closing brace, the type of each enumerator is the type of its
12754 initializing value. */
12755 TREE_TYPE (decl
) = enumtype
;
12757 /* Update the minimum and maximum values, if appropriate. */
12758 value
= DECL_INITIAL (decl
);
12759 if (value
== error_mark_node
)
12760 value
= integer_zero_node
;
12761 /* Figure out what the minimum and maximum values of the
12762 enumerators are. */
12764 minnode
= maxnode
= value
;
12765 else if (tree_int_cst_lt (maxnode
, value
))
12767 else if (tree_int_cst_lt (value
, minnode
))
12774 If the enumerator-list is empty, the underlying type is as if
12775 the enumeration had a single enumerator with value 0. */
12776 minnode
= maxnode
= integer_zero_node
;
12778 if (!fixed_underlying_type_p
)
12780 /* Compute the number of bits require to represent all values of the
12781 enumeration. We must do this before the type of MINNODE and
12782 MAXNODE are transformed, since tree_int_cst_min_precision relies
12783 on the TREE_TYPE of the value it is passed. */
12784 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12785 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12786 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12787 int precision
= MAX (lowprec
, highprec
);
12789 bool use_short_enum
;
12791 /* Determine the underlying type of the enumeration.
12795 The underlying type of an enumeration is an integral type that
12796 can represent all the enumerator values defined in the
12797 enumeration. It is implementation-defined which integral type is
12798 used as the underlying type for an enumeration except that the
12799 underlying type shall not be larger than int unless the value of
12800 an enumerator cannot fit in an int or unsigned int.
12802 We use "int" or an "unsigned int" as the underlying type, even if
12803 a smaller integral type would work, unless the user has
12804 explicitly requested that we use the smallest possible type. The
12805 user can request that for all enumerations with a command line
12806 flag, or for just one enumeration with an attribute. */
12808 use_short_enum
= flag_short_enums
12809 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12811 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12815 underlying_type
= integer_types
[itk
];
12816 if (underlying_type
!= NULL_TREE
12817 && TYPE_PRECISION (underlying_type
) >= precision
12818 && TYPE_SIGN (underlying_type
) == sgn
)
12821 if (itk
== itk_none
)
12825 IF no integral type can represent all the enumerator values, the
12826 enumeration is ill-formed. */
12827 error ("no integral type can represent all of the enumerator values "
12828 "for %qT", enumtype
);
12829 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12830 underlying_type
= integer_types
[itk_unsigned_long_long
];
12835 The value of sizeof() applied to an enumeration type, an object
12836 of an enumeration type, or an enumerator, is the value of sizeof()
12837 applied to the underlying type. */
12838 copy_type_enum (enumtype
, underlying_type
);
12840 /* Compute the minimum and maximum values for the type.
12844 For an enumeration where emin is the smallest enumerator and emax
12845 is the largest, the values of the enumeration are the values of the
12846 underlying type in the range bmin to bmax, where bmin and bmax are,
12847 respectively, the smallest and largest values of the smallest bit-
12848 field that can store emin and emax. */
12850 /* The middle-end currently assumes that types with TYPE_PRECISION
12851 narrower than their underlying type are suitably zero or sign
12852 extended to fill their mode. Similarly, it assumes that the front
12853 end assures that a value of a particular type must be within
12854 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12856 We used to set these fields based on bmin and bmax, but that led
12857 to invalid assumptions like optimizing away bounds checking. So
12858 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12859 TYPE_MAX_VALUE to the values for the mode above and only restrict
12860 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12861 ENUM_UNDERLYING_TYPE (enumtype
)
12862 = build_distinct_type_copy (underlying_type
);
12863 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12864 set_min_and_max_values_for_integral_type
12865 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12867 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12868 if (flag_strict_enums
)
12869 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12872 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12874 /* Convert each of the enumerators to the type of the underlying
12875 type of the enumeration. */
12876 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12878 location_t saved_location
;
12880 decl
= TREE_VALUE (values
);
12881 saved_location
= input_location
;
12882 input_location
= DECL_SOURCE_LOCATION (decl
);
12883 if (fixed_underlying_type_p
)
12884 /* If the enumeration type has a fixed underlying type, we
12885 already checked all of the enumerator values. */
12886 value
= DECL_INITIAL (decl
);
12888 value
= perform_implicit_conversion (underlying_type
,
12889 DECL_INITIAL (decl
),
12890 tf_warning_or_error
);
12891 input_location
= saved_location
;
12893 /* Do not clobber shared ints. */
12894 value
= copy_node (value
);
12896 TREE_TYPE (value
) = enumtype
;
12897 DECL_INITIAL (decl
) = value
;
12900 /* Fix up all variant types of this enum type. */
12901 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12902 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12904 if (at_class_scope_p ()
12905 && COMPLETE_TYPE_P (current_class_type
)
12906 && UNSCOPED_ENUM_P (enumtype
))
12907 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12908 current_class_type
);
12910 /* Finish debugging output for this type. */
12911 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12914 /* Finishes the enum type. This is called only the first time an
12915 enumeration is seen, be it opaque or odinary.
12916 ENUMTYPE is the type object. */
12919 finish_enum (tree enumtype
)
12921 if (processing_template_decl
)
12923 if (at_function_scope_p ())
12924 add_stmt (build_min (TAG_DEFN
, enumtype
));
12928 /* If this is a forward declaration, there should not be any variants,
12929 though we can get a variant in the middle of an enum-specifier with
12930 wacky code like 'enum E { e = sizeof(const E*) };' */
12931 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12932 && (TYPE_VALUES (enumtype
)
12933 || !TYPE_NEXT_VARIANT (enumtype
)));
12936 /* Build and install a CONST_DECL for an enumeration constant of the
12937 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12938 LOC is the location of NAME.
12939 Assignment of sequential values by default is handled here. */
12942 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12948 /* If the VALUE was erroneous, pretend it wasn't there; that will
12949 result in the enum being assigned the next value in sequence. */
12950 if (value
== error_mark_node
)
12953 /* Remove no-op casts from the value. */
12955 STRIP_TYPE_NOPS (value
);
12957 if (! processing_template_decl
)
12959 /* Validate and default VALUE. */
12960 if (value
!= NULL_TREE
)
12962 if (!ENUM_UNDERLYING_TYPE (enumtype
))
12964 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
12969 else if (! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12970 value
= perform_implicit_conversion_flags
12971 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
12972 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
12974 if (value
== error_mark_node
)
12977 if (value
!= NULL_TREE
)
12979 value
= cxx_constant_value (value
);
12981 if (TREE_CODE (value
) != INTEGER_CST
12982 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12984 error ("enumerator value for %qD is not an integer constant",
12991 /* Default based on previous value. */
12992 if (value
== NULL_TREE
)
12994 if (TYPE_VALUES (enumtype
))
12999 /* C++03 7.2/4: If no initializer is specified for the first
13000 enumerator, the type is an unspecified integral
13001 type. Otherwise the type is the same as the type of the
13002 initializing value of the preceding enumerator unless the
13003 incremented value is not representable in that type, in
13004 which case the type is an unspecified integral type
13005 sufficient to contain the incremented value. */
13006 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13007 if (error_operand_p (prev_value
))
13008 value
= error_mark_node
;
13011 tree type
= TREE_TYPE (prev_value
);
13012 signop sgn
= TYPE_SIGN (type
);
13013 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13017 bool pos
= !wi::neg_p (wi
, sgn
);
13018 if (!wi::fits_to_tree_p (wi
, type
))
13021 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13023 type
= integer_types
[itk
];
13024 if (type
!= NULL_TREE
13025 && (pos
|| !TYPE_UNSIGNED (type
))
13026 && wi::fits_to_tree_p (wi
, type
))
13029 if (type
&& cxx_dialect
< cxx11
13030 && itk
> itk_unsigned_long
)
13031 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13032 incremented enumerator value is too large for %<unsigned long%>" : "\
13033 incremented enumerator value is too large for %<long%>");
13035 if (type
== NULL_TREE
)
13038 value
= wide_int_to_tree (type
, wi
);
13043 error ("overflow in enumeration values at %qD", name
);
13044 value
= error_mark_node
;
13049 value
= integer_zero_node
;
13052 /* Remove no-op casts from the value. */
13053 STRIP_TYPE_NOPS (value
);
13055 /* If the underlying type of the enum is fixed, check whether
13056 the enumerator values fits in the underlying type. If it
13057 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13058 if (ENUM_UNDERLYING_TYPE (enumtype
)
13060 && TREE_CODE (value
) == INTEGER_CST
)
13062 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13063 error ("enumerator value %E is outside the range of underlying "
13064 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13066 /* Convert the value to the appropriate type. */
13067 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13071 /* C++ associates enums with global, function, or class declarations. */
13072 context
= current_scope ();
13074 /* Build the actual enumeration constant. Note that the enumeration
13075 constants have the underlying type of the enum (if it is fixed)
13076 or the type of their initializer (if the underlying type of the
13077 enum is not fixed):
13081 If the underlying type is fixed, the type of each enumerator
13082 prior to the closing brace is the underlying type; if the
13083 initializing value of an enumerator cannot be represented by
13084 the underlying type, the program is ill-formed. If the
13085 underlying type is not fixed, the type of each enumerator is
13086 the type of its initializing value.
13088 If the underlying type is not fixed, it will be computed by
13089 finish_enum and we will reset the type of this enumerator. Of
13090 course, if we're processing a template, there may be no value. */
13091 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13093 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13095 DECL_CONTEXT (decl
) = enumtype
;
13096 TREE_CONSTANT (decl
) = 1;
13097 TREE_READONLY (decl
) = 1;
13098 DECL_INITIAL (decl
) = value
;
13100 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13101 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13102 on the TYPE_FIELDS list for `S'. (That's so that you can say
13103 things like `S::i' later.) */
13104 finish_member_declaration (decl
);
13108 /* Add this enumeration constant to the list for this type. */
13109 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13112 /* Look for an enumerator with the given NAME within the enumeration
13113 type ENUMTYPE. This routine is used primarily for qualified name
13114 lookup into an enumerator in C++0x, e.g.,
13116 enum class Color { Red, Green, Blue };
13118 Color color = Color::Red;
13120 Returns the value corresponding to the enumerator, or
13121 NULL_TREE if no such enumerator was found. */
13123 lookup_enumerator (tree enumtype
, tree name
)
13126 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13128 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13129 return e
? TREE_VALUE (e
) : NULL_TREE
;
13133 /* We're defining DECL. Make sure that its type is OK. */
13136 check_function_type (tree decl
, tree current_function_parms
)
13138 tree fntype
= TREE_TYPE (decl
);
13139 tree return_type
= complete_type (TREE_TYPE (fntype
));
13141 /* In a function definition, arg types must be complete. */
13142 require_complete_types_for_parms (current_function_parms
);
13144 if (dependent_type_p (return_type
)
13145 || type_uses_auto (return_type
))
13147 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13148 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13150 tree args
= TYPE_ARG_TYPES (fntype
);
13152 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13153 error ("return type %q#T is incomplete", return_type
);
13155 error ("return type has Java class type %q#T", return_type
);
13157 /* Make it return void instead. */
13158 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13159 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13161 TREE_CHAIN (args
));
13163 fntype
= build_function_type (void_type_node
, args
);
13165 = build_exception_variant (fntype
,
13166 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13167 fntype
= (cp_build_type_attribute_variant
13168 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13169 TREE_TYPE (decl
) = fntype
;
13172 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13175 /* Create the FUNCTION_DECL for a function definition.
13176 DECLSPECS and DECLARATOR are the parts of the declaration;
13177 they describe the function's name and the type it returns,
13178 but twisted together in a fashion that parallels the syntax of C.
13180 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13181 DECLARATOR is really the DECL for the function we are about to
13182 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13183 indicating that the function is an inline defined in-class.
13185 This function creates a binding context for the function body
13186 as well as setting up the FUNCTION_DECL in current_function_decl.
13188 For C++, we must first check whether that datum makes any sense.
13189 For example, "class A local_a(1,2);" means that variable local_a
13190 is an aggregate of type A, which should have a constructor
13191 applied to it with the argument list [1, 2].
13193 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13194 or may be a BLOCK if the function has been defined previously
13195 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13196 error_mark_node if the function has never been defined, or
13197 a BLOCK if the function has been defined somewhere. */
13200 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13202 tree ctype
= NULL_TREE
;
13205 int doing_friend
= 0;
13206 cp_binding_level
*bl
;
13207 tree current_function_parms
;
13208 struct c_fileinfo
*finfo
13209 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13210 bool honor_interface
;
13212 /* Sanity check. */
13213 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13214 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13216 fntype
= TREE_TYPE (decl1
);
13217 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13218 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13220 /* ISO C++ 11.4/5. A friend function defined in a class is in
13221 the (lexical) scope of the class in which it is defined. */
13222 if (!ctype
&& DECL_FRIEND_P (decl1
))
13224 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13226 /* CTYPE could be null here if we're dealing with a template;
13227 for example, `inline friend float foo()' inside a template
13228 will have no CTYPE set. */
13229 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13235 if (DECL_DECLARED_INLINE_P (decl1
)
13236 && lookup_attribute ("noinline", attrs
))
13237 warning (0, "inline function %q+D given attribute noinline", decl1
);
13239 /* Handle gnu_inline attribute. */
13240 if (GNU_INLINE_P (decl1
))
13242 DECL_EXTERNAL (decl1
) = 1;
13243 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13244 DECL_INTERFACE_KNOWN (decl1
) = 1;
13245 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13248 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13249 /* This is a constructor, we must ensure that any default args
13250 introduced by this definition are propagated to the clones
13251 now. The clones are used directly in overload resolution. */
13252 adjust_clone_args (decl1
);
13254 /* Sometimes we don't notice that a function is a static member, and
13255 build a METHOD_TYPE for it. Fix that up now. */
13256 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13257 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13259 /* Set up current_class_type, and enter the scope of the class, if
13262 push_nested_class (ctype
);
13263 else if (DECL_STATIC_FUNCTION_P (decl1
))
13264 push_nested_class (DECL_CONTEXT (decl1
));
13266 /* Now that we have entered the scope of the class, we must restore
13267 the bindings for any template parameters surrounding DECL1, if it
13268 is an inline member template. (Order is important; consider the
13269 case where a template parameter has the same name as a field of
13270 the class.) It is not until after this point that
13271 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13272 if (flags
& SF_INCLASS_INLINE
)
13273 maybe_begin_member_template_processing (decl1
);
13275 /* Effective C++ rule 15. */
13277 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13278 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13279 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13281 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13282 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13283 if (!DECL_INITIAL (decl1
))
13284 DECL_INITIAL (decl1
) = error_mark_node
;
13286 /* This function exists in static storage.
13287 (This does not mean `static' in the C sense!) */
13288 TREE_STATIC (decl1
) = 1;
13290 /* We must call push_template_decl after current_class_type is set
13291 up. (If we are processing inline definitions after exiting a
13292 class scope, current_class_type will be NULL_TREE until set above
13293 by push_nested_class.) */
13294 if (processing_template_decl
)
13296 tree newdecl1
= push_template_decl (decl1
);
13297 if (newdecl1
== error_mark_node
)
13299 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13300 pop_nested_class ();
13306 /* We are now in the scope of the function being defined. */
13307 current_function_decl
= decl1
;
13309 /* Save the parm names or decls from this function's declarator
13310 where store_parm_decls will find them. */
13311 current_function_parms
= DECL_ARGUMENTS (decl1
);
13313 /* Make sure the parameter and return types are reasonable. When
13314 you declare a function, these types can be incomplete, but they
13315 must be complete when you define the function. */
13316 check_function_type (decl1
, current_function_parms
);
13318 /* Build the return declaration for the function. */
13319 restype
= TREE_TYPE (fntype
);
13321 if (DECL_RESULT (decl1
) == NULL_TREE
)
13325 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13326 DECL_ARTIFICIAL (resdecl
) = 1;
13327 DECL_IGNORED_P (resdecl
) = 1;
13328 DECL_RESULT (decl1
) = resdecl
;
13330 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13333 /* Let the user know we're compiling this function. */
13334 announce_function (decl1
);
13336 /* Record the decl so that the function name is defined.
13337 If we already have a decl for this name, and it is a FUNCTION_DECL,
13338 use the old decl. */
13339 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13341 /* A specialization is not used to guide overload resolution. */
13342 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13343 && !(DECL_USE_TEMPLATE (decl1
) &&
13344 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13346 tree olddecl
= pushdecl (decl1
);
13348 if (olddecl
== error_mark_node
)
13349 /* If something went wrong when registering the declaration,
13350 use DECL1; we have to have a FUNCTION_DECL to use when
13351 parsing the body of the function. */
13355 /* Otherwise, OLDDECL is either a previous declaration
13356 of the same function or DECL1 itself. */
13358 if (warn_missing_declarations
13359 && olddecl
== decl1
13360 && !DECL_MAIN_P (decl1
)
13361 && TREE_PUBLIC (decl1
)
13362 && !DECL_DECLARED_INLINE_P (decl1
))
13366 /* Check whether DECL1 is in an anonymous
13368 for (context
= DECL_CONTEXT (decl1
);
13370 context
= DECL_CONTEXT (context
))
13372 if (TREE_CODE (context
) == NAMESPACE_DECL
13373 && DECL_NAME (context
) == NULL_TREE
)
13377 if (context
== NULL
)
13378 warning (OPT_Wmissing_declarations
,
13379 "no previous declaration for %q+D", decl1
);
13387 /* We need to set the DECL_CONTEXT. */
13388 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13389 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13391 fntype
= TREE_TYPE (decl1
);
13392 restype
= TREE_TYPE (fntype
);
13394 /* If #pragma weak applies, mark the decl appropriately now.
13395 The pragma only applies to global functions. Because
13396 determining whether or not the #pragma applies involves
13397 computing the mangled name for the declaration, we cannot
13398 apply the pragma until after we have merged this declaration
13399 with any previous declarations; if the original declaration
13400 has a linkage specification, that specification applies to
13401 the definition as well, and may affect the mangled name. */
13402 if (DECL_FILE_SCOPE_P (decl1
))
13403 maybe_apply_pragma_weak (decl1
);
13406 /* Reset this in case the call to pushdecl changed it. */
13407 current_function_decl
= decl1
;
13409 gcc_assert (DECL_INITIAL (decl1
));
13411 /* This function may already have been parsed, in which case just
13412 return; our caller will skip over the body without parsing. */
13413 if (DECL_INITIAL (decl1
) != error_mark_node
)
13416 /* Initialize RTL machinery. We cannot do this until
13417 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13418 even when processing a template; this is how we get
13419 CFUN set up, and our per-function variables initialized.
13420 FIXME factor out the non-RTL stuff. */
13421 bl
= current_binding_level
;
13422 allocate_struct_function (decl1
, processing_template_decl
);
13424 /* Initialize the language data structures. Whenever we start
13425 a new function, we destroy temporaries in the usual way. */
13426 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13427 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13428 current_binding_level
= bl
;
13430 if (!processing_template_decl
&& type_uses_auto (restype
))
13432 FNDECL_USED_AUTO (decl1
) = true;
13433 current_function_auto_return_pattern
= restype
;
13436 /* Start the statement-tree, start the tree now. */
13437 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13439 /* If we are (erroneously) defining a function that we have already
13440 defined before, wipe out what we knew before. */
13441 if (!DECL_PENDING_INLINE_P (decl1
))
13442 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13444 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13446 /* We know that this was set up by `grokclassfn'. We do not
13447 wait until `store_parm_decls', since evil parse errors may
13448 never get us to that point. Here we keep the consistency
13449 between `current_class_type' and `current_class_ptr'. */
13450 tree t
= DECL_ARGUMENTS (decl1
);
13452 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13453 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13455 cp_function_chain
->x_current_class_ref
13456 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13457 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13458 cp_function_chain
->x_current_class_ptr
= t
;
13460 /* Constructors and destructors need to know whether they're "in
13461 charge" of initializing virtual base classes. */
13462 t
= DECL_CHAIN (t
);
13463 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13465 current_in_charge_parm
= t
;
13466 t
= DECL_CHAIN (t
);
13468 if (DECL_HAS_VTT_PARM_P (decl1
))
13470 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13471 current_vtt_parm
= t
;
13475 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13476 /* Implicitly-defined methods (like the
13477 destructor for a class in which no destructor
13478 is explicitly declared) must not be defined
13479 until their definition is needed. So, we
13480 ignore interface specifications for
13481 compiler-generated functions. */
13482 && !DECL_ARTIFICIAL (decl1
));
13484 if (processing_template_decl
)
13485 /* Don't mess with interface flags. */;
13486 else if (DECL_INTERFACE_KNOWN (decl1
))
13488 tree ctx
= decl_function_context (decl1
);
13490 if (DECL_NOT_REALLY_EXTERN (decl1
))
13491 DECL_EXTERNAL (decl1
) = 0;
13493 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13494 /* This is a function in a local class in an extern inline
13495 or template function. */
13496 comdat_linkage (decl1
);
13498 /* If this function belongs to an interface, it is public.
13499 If it belongs to someone else's interface, it is also external.
13500 This only affects inlines and template instantiations. */
13501 else if (!finfo
->interface_unknown
&& honor_interface
)
13503 if (DECL_DECLARED_INLINE_P (decl1
)
13504 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13506 DECL_EXTERNAL (decl1
)
13507 = (finfo
->interface_only
13508 || (DECL_DECLARED_INLINE_P (decl1
)
13509 && ! flag_implement_inlines
13510 && !DECL_VINDEX (decl1
)));
13512 /* For WIN32 we also want to put these in linkonce sections. */
13513 maybe_make_one_only (decl1
);
13516 DECL_EXTERNAL (decl1
) = 0;
13517 DECL_INTERFACE_KNOWN (decl1
) = 1;
13518 /* If this function is in an interface implemented in this file,
13519 make sure that the back end knows to emit this function
13521 if (!DECL_EXTERNAL (decl1
))
13522 mark_needed (decl1
);
13524 else if (finfo
->interface_unknown
&& finfo
->interface_only
13525 && honor_interface
)
13527 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13528 interface, we will have both finfo->interface_unknown and
13529 finfo->interface_only set. In that case, we don't want to
13530 use the normal heuristics because someone will supply a
13531 #pragma implementation elsewhere, and deducing it here would
13532 produce a conflict. */
13533 comdat_linkage (decl1
);
13534 DECL_EXTERNAL (decl1
) = 0;
13535 DECL_INTERFACE_KNOWN (decl1
) = 1;
13536 DECL_DEFER_OUTPUT (decl1
) = 1;
13540 /* This is a definition, not a reference.
13541 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13542 if (!GNU_INLINE_P (decl1
))
13543 DECL_EXTERNAL (decl1
) = 0;
13545 if ((DECL_DECLARED_INLINE_P (decl1
)
13546 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13547 && ! DECL_INTERFACE_KNOWN (decl1
))
13548 DECL_DEFER_OUTPUT (decl1
) = 1;
13550 DECL_INTERFACE_KNOWN (decl1
) = 1;
13553 /* Determine the ELF visibility attribute for the function. We must not
13554 do this before calling "pushdecl", as we must allow "duplicate_decls"
13555 to merge any attributes appropriately. We also need to wait until
13557 if (!DECL_CLONED_FUNCTION_P (decl1
))
13558 determine_visibility (decl1
);
13560 if (!processing_template_decl
)
13561 maybe_instantiate_noexcept (decl1
);
13563 begin_scope (sk_function_parms
, decl1
);
13567 if (DECL_DESTRUCTOR_P (decl1
)
13568 || (DECL_CONSTRUCTOR_P (decl1
)
13569 && targetm
.cxx
.cdtor_returns_this ()))
13571 cdtor_label
= build_decl (input_location
,
13572 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13573 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13576 start_fname_decls ();
13578 store_parm_decls (current_function_parms
);
13584 /* Like start_preparsed_function, except that instead of a
13585 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13587 Returns true on success. If the DECLARATOR is not suitable
13588 for a function, we return false, which tells the parser to
13589 skip the entire function. */
13592 start_function (cp_decl_specifier_seq
*declspecs
,
13593 const cp_declarator
*declarator
,
13598 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13599 if (decl1
== error_mark_node
)
13601 /* If the declarator is not suitable for a function definition,
13602 cause a syntax error. */
13603 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13605 error ("invalid function declaration");
13609 if (DECL_MAIN_P (decl1
))
13610 /* main must return int. grokfndecl should have corrected it
13611 (and issued a diagnostic) if the user got it wrong. */
13612 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13613 integer_type_node
));
13615 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13618 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13622 use_eh_spec_block (tree fn
)
13624 return (flag_exceptions
&& flag_enforce_eh_specs
13625 && !processing_template_decl
13626 && !type_throw_all_p (TREE_TYPE (fn
))
13627 /* We insert the EH_SPEC_BLOCK only in the original
13628 function; then, it is copied automatically to the
13630 && !DECL_CLONED_FUNCTION_P (fn
)
13631 /* Implicitly-generated constructors and destructors have
13632 exception specifications. However, those specifications
13633 are the union of the possible exceptions specified by the
13634 constructors/destructors for bases and members, so no
13635 unallowed exception will ever reach this function. By
13636 not creating the EH_SPEC_BLOCK we save a little memory,
13637 and we avoid spurious warnings about unreachable
13639 && !DECL_DEFAULTED_FN (fn
));
13642 /* Store the parameter declarations into the current function declaration.
13643 This is called after parsing the parameter declarations, before
13644 digesting the body of the function.
13646 Also install to binding contour return value identifier, if any. */
13649 store_parm_decls (tree current_function_parms
)
13651 tree fndecl
= current_function_decl
;
13654 /* This is a chain of any other decls that came in among the parm
13655 declarations. If a parm is declared with enum {foo, bar} x;
13656 then CONST_DECLs for foo and bar are put here. */
13657 tree nonparms
= NULL_TREE
;
13659 if (current_function_parms
)
13661 /* This case is when the function was defined with an ANSI prototype.
13662 The parms already have decls, so we need not do anything here
13663 except record them as in effect
13664 and complain if any redundant old-style parm decls were written. */
13666 tree specparms
= current_function_parms
;
13669 /* Must clear this because it might contain TYPE_DECLs declared
13671 current_binding_level
->names
= NULL
;
13673 /* If we're doing semantic analysis, then we'll call pushdecl
13674 for each of these. We must do them in reverse order so that
13675 they end in the correct forward order. */
13676 specparms
= nreverse (specparms
);
13678 for (parm
= specparms
; parm
; parm
= next
)
13680 next
= DECL_CHAIN (parm
);
13681 if (TREE_CODE (parm
) == PARM_DECL
)
13683 if (DECL_NAME (parm
) == NULL_TREE
13684 || !VOID_TYPE_P (parm
))
13687 error ("parameter %qD declared void", parm
);
13691 /* If we find an enum constant or a type tag,
13692 put it aside for the moment. */
13693 TREE_CHAIN (parm
) = NULL_TREE
;
13694 nonparms
= chainon (nonparms
, parm
);
13698 /* Get the decls in their original chain order and record in the
13699 function. This is all and only the PARM_DECLs that were
13700 pushed into scope by the loop above. */
13701 DECL_ARGUMENTS (fndecl
) = getdecls ();
13704 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13706 /* Now store the final chain of decls for the arguments
13707 as the decl-chain of the current lexical scope.
13708 Put the enumerators in as well, at the front so that
13709 DECL_ARGUMENTS is not modified. */
13710 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13712 if (use_eh_spec_block (current_function_decl
))
13713 current_eh_spec_block
= begin_eh_spec_block ();
13717 /* We have finished doing semantic analysis on DECL, but have not yet
13718 generated RTL for its body. Save away our current state, so that
13719 when we want to generate RTL later we know what to do. */
13722 save_function_data (tree decl
)
13724 struct language_function
*f
;
13726 /* Save the language-specific per-function data so that we can
13727 get it back when we really expand this function. */
13728 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13731 f
= ggc_alloc
<language_function
> ();
13732 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13733 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13735 /* Clear out the bits we don't need. */
13736 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13737 f
->bindings
= NULL
;
13738 f
->x_local_names
= NULL
;
13739 f
->base
.local_typedefs
= NULL
;
13743 /* Set the return value of the constructor (if present). */
13746 finish_constructor_body (void)
13751 if (targetm
.cxx
.cdtor_returns_this ()
13752 && (! TYPE_FOR_JAVA (current_class_type
)))
13754 /* Any return from a constructor will end up here. */
13755 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13757 val
= DECL_ARGUMENTS (current_function_decl
);
13758 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13759 DECL_RESULT (current_function_decl
), val
);
13760 /* Return the address of the object. */
13761 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13762 add_stmt (exprstmt
);
13766 /* Do all the processing for the beginning of a destructor; set up the
13767 vtable pointers and cleanups for bases and members. */
13770 begin_destructor_body (void)
13772 tree compound_stmt
;
13774 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13775 issued an error message. We still want to try to process the
13776 body of the function, but initialize_vtbl_ptrs will crash if
13777 TYPE_BINFO is NULL. */
13778 if (COMPLETE_TYPE_P (current_class_type
))
13780 compound_stmt
= begin_compound_stmt (0);
13781 /* Make all virtual function table pointers in non-virtual base
13782 classes point to CURRENT_CLASS_TYPE's virtual function
13784 initialize_vtbl_ptrs (current_class_ptr
);
13785 finish_compound_stmt (compound_stmt
);
13787 /* Insert a cleanup to let the back end know that the object is dead
13788 when we exit the destructor, either normally or via exception. */
13789 tree clobber
= build_constructor (current_class_type
, NULL
);
13790 TREE_THIS_VOLATILE (clobber
) = true;
13791 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13792 current_class_ref
, clobber
);
13793 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13795 /* And insert cleanups for our bases and members so that they
13796 will be properly destroyed if we throw. */
13797 push_base_cleanups ();
13801 /* At the end of every destructor we generate code to delete the object if
13802 necessary. Do that now. */
13805 finish_destructor_body (void)
13809 /* Any return from a destructor will end up here; that way all base
13810 and member cleanups will be run when the function returns. */
13811 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13813 /* In a virtual destructor, we must call delete. */
13814 if (DECL_VIRTUAL_P (current_function_decl
))
13817 tree virtual_size
= cxx_sizeof (current_class_type
);
13821 At the point of definition of a virtual destructor (including
13822 an implicit definition), non-placement operator delete shall
13823 be looked up in the scope of the destructor's class and if
13824 found shall be accessible and unambiguous. */
13825 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13827 /*global_p=*/false,
13828 /*placement=*/NULL_TREE
,
13829 /*alloc_fn=*/NULL_TREE
,
13830 tf_warning_or_error
);
13832 if_stmt
= begin_if_stmt ();
13833 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13834 current_in_charge_parm
,
13837 finish_expr_stmt (exprstmt
);
13838 finish_then_clause (if_stmt
);
13839 finish_if_stmt (if_stmt
);
13842 if (targetm
.cxx
.cdtor_returns_this ())
13846 val
= DECL_ARGUMENTS (current_function_decl
);
13847 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13848 DECL_RESULT (current_function_decl
), val
);
13849 /* Return the address of the object. */
13850 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13851 add_stmt (exprstmt
);
13855 /* Do the necessary processing for the beginning of a function body, which
13856 in this case includes member-initializers, but not the catch clauses of
13857 a function-try-block. Currently, this means opening a binding level
13858 for the member-initializers (in a ctor), member cleanups (in a dtor),
13859 and capture proxies (in a lambda operator()). */
13862 begin_function_body (void)
13866 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13869 if (processing_template_decl
)
13870 /* Do nothing now. */;
13872 /* Always keep the BLOCK node associated with the outermost pair of
13873 curly braces of a function. These are needed for correct
13874 operation of dwarfout.c. */
13875 keep_next_level (true);
13877 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13879 if (processing_template_decl
)
13880 /* Do nothing now. */;
13881 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13882 begin_destructor_body ();
13887 /* Do the processing for the end of a function body. Currently, this means
13888 closing out the cleanups for fully-constructed bases and members, and in
13889 the case of the destructor, deleting the object if desired. Again, this
13890 is only meaningful for [cd]tors, since they are the only functions where
13891 there is a significant distinction between the main body and any
13892 function catch clauses. Handling, say, main() return semantics here
13893 would be wrong, as flowing off the end of a function catch clause for
13894 main() would also need to return 0. */
13897 finish_function_body (tree compstmt
)
13899 if (compstmt
== NULL_TREE
)
13902 /* Close the block. */
13903 finish_compound_stmt (compstmt
);
13905 if (processing_template_decl
)
13906 /* Do nothing now. */;
13907 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13908 finish_constructor_body ();
13909 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13910 finish_destructor_body ();
13913 /* Given a function, returns the BLOCK corresponding to the outermost level
13914 of curly braces, skipping the artificial block created for constructor
13918 outer_curly_brace_block (tree fndecl
)
13920 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13921 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13922 /* Skip the artificial function body block. */
13923 block
= BLOCK_SUBBLOCKS (block
);
13927 /* If FNDECL is a class's key method, add the class to the list of
13928 keyed classes that should be emitted. */
13931 record_key_method_defined (tree fndecl
)
13933 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13934 && DECL_VIRTUAL_P (fndecl
)
13935 && !processing_template_decl
)
13937 tree fnclass
= DECL_CONTEXT (fndecl
);
13938 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13939 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13943 /* Subroutine of finish_function.
13944 Save the body of constexpr functions for possible
13945 future compile time evaluation. */
13948 maybe_save_function_definition (tree fun
)
13950 if (!processing_template_decl
13951 && DECL_DECLARED_CONSTEXPR_P (fun
)
13952 && !DECL_CLONED_FUNCTION_P (fun
))
13953 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13956 /* Finish up a function declaration and compile that function
13957 all the way to assembler language output. The free the storage
13958 for the function definition.
13960 FLAGS is a bitwise or of the following values:
13962 We just finished processing the body of an in-class inline
13963 function definition. (This processing will have taken place
13964 after the class definition is complete.) */
13967 finish_function (int flags
)
13969 tree fndecl
= current_function_decl
;
13970 tree fntype
, ctype
= NULL_TREE
;
13971 int inclass_inline
= (flags
& 2) != 0;
13973 /* When we get some parse errors, we can end up without a
13974 current_function_decl, so cope. */
13975 if (fndecl
== NULL_TREE
)
13976 return error_mark_node
;
13978 if (c_dialect_objc ())
13979 objc_finish_function ();
13981 gcc_assert (!defer_mark_used_calls
);
13982 defer_mark_used_calls
= true;
13984 record_key_method_defined (fndecl
);
13986 fntype
= TREE_TYPE (fndecl
);
13988 /* TREE_READONLY (fndecl) = 1;
13989 This caused &foo to be of type ptr-to-const-function
13990 which then got a warning when stored in a ptr-to-function variable. */
13992 gcc_assert (building_stmt_list_p ());
13993 /* The current function is being defined, so its DECL_INITIAL should
13994 be set, and unless there's a multiple definition, it should be
13995 error_mark_node. */
13996 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13998 /* For a cloned function, we've already got all the code we need;
13999 there's no need to add any extra bits. */
14000 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14002 /* Make it so that `main' always returns 0 by default. */
14003 if (DECL_MAIN_P (current_function_decl
))
14004 finish_return_stmt (integer_zero_node
);
14006 if (use_eh_spec_block (current_function_decl
))
14007 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14008 (TREE_TYPE (current_function_decl
)),
14009 current_eh_spec_block
);
14012 /* If we're saving up tree structure, tie off the function now. */
14013 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14015 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14016 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14018 finish_fname_decls ();
14020 /* If this function can't throw any exceptions, remember that. */
14021 if (!processing_template_decl
14022 && !cp_function_chain
->can_throw
14023 && !flag_non_call_exceptions
14024 && !decl_replaceable_p (fndecl
))
14025 TREE_NOTHROW (fndecl
) = 1;
14027 /* This must come after expand_function_end because cleanups might
14028 have declarations (from inline functions) that need to go into
14029 this function's blocks. */
14031 /* If the current binding level isn't the outermost binding level
14032 for this function, either there is a bug, or we have experienced
14033 syntax errors and the statement tree is malformed. */
14034 if (current_binding_level
->kind
!= sk_function_parms
)
14036 /* Make sure we have already experienced errors. */
14037 gcc_assert (errorcount
);
14039 /* Throw away the broken statement tree and extra binding
14041 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14043 while (current_binding_level
->kind
!= sk_function_parms
)
14045 if (current_binding_level
->kind
== sk_class
)
14046 pop_nested_class ();
14048 poplevel (0, 0, 0);
14051 poplevel (1, 0, 1);
14053 /* Statements should always be full-expressions at the outermost set
14054 of curly braces for a function. */
14055 gcc_assert (stmts_are_full_exprs_p ());
14057 /* If there are no return statements in a function with auto return type,
14058 the return type is void. But if the declared type is something like
14059 auto*, this is an error. */
14060 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14061 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14063 if (!is_auto (current_function_auto_return_pattern
)
14064 && !current_function_returns_value
&& !current_function_returns_null
)
14066 error ("no return statements in function returning %qT",
14067 current_function_auto_return_pattern
);
14068 inform (input_location
, "only plain %<auto%> return type can be "
14069 "deduced to %<void%>");
14071 apply_deduced_return_type (fndecl
, void_type_node
);
14072 fntype
= TREE_TYPE (fndecl
);
14075 /* Save constexpr function body before it gets munged by
14076 the NRV transformation. */
14077 maybe_save_function_definition (fndecl
);
14079 /* Set up the named return value optimization, if we can. Candidate
14080 variables are selected in check_return_expr. */
14081 if (current_function_return_value
)
14083 tree r
= current_function_return_value
;
14086 if (r
!= error_mark_node
14087 /* This is only worth doing for fns that return in memory--and
14088 simpler, since we don't have to worry about promoted modes. */
14089 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14090 /* Only allow this for variables declared in the outer scope of
14091 the function so we know that their lifetime always ends with a
14092 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14093 we were to do this optimization in tree-ssa. */
14094 && (outer
= outer_curly_brace_block (fndecl
))
14095 && chain_member (r
, BLOCK_VARS (outer
)))
14096 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14098 current_function_return_value
= NULL_TREE
;
14101 /* Remember that we were in class scope. */
14102 if (current_class_name
)
14103 ctype
= current_class_type
;
14105 /* Must mark the RESULT_DECL as being in this function. */
14106 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14108 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14109 to the FUNCTION_DECL node itself. */
14110 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14112 /* Save away current state, if appropriate. */
14113 if (!processing_template_decl
)
14114 save_function_data (fndecl
);
14116 /* Complain if there's just no return statement. */
14117 if (warn_return_type
14118 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14119 && !dependent_type_p (TREE_TYPE (fntype
))
14120 && !current_function_returns_value
&& !current_function_returns_null
14121 /* Don't complain if we abort or throw. */
14122 && !current_function_returns_abnormally
14123 /* Don't complain if there's an infinite loop. */
14124 && !current_function_infinite_loop
14125 /* Don't complain if we are declared noreturn. */
14126 && !TREE_THIS_VOLATILE (fndecl
)
14127 && !DECL_NAME (DECL_RESULT (fndecl
))
14128 && !TREE_NO_WARNING (fndecl
)
14129 /* Structor return values (if any) are set by the compiler. */
14130 && !DECL_CONSTRUCTOR_P (fndecl
)
14131 && !DECL_DESTRUCTOR_P (fndecl
)
14132 && targetm
.warn_func_return (fndecl
))
14134 warning (OPT_Wreturn_type
,
14135 "no return statement in function returning non-void");
14136 TREE_NO_WARNING (fndecl
) = 1;
14139 /* Store the end of the function, so that we get good line number
14140 info for the epilogue. */
14141 cfun
->function_end_locus
= input_location
;
14143 /* Complain about parameters that are only set, but never otherwise used. */
14144 if (warn_unused_but_set_parameter
14145 && !processing_template_decl
14146 && errorcount
== unused_but_set_errorcount
14147 && !DECL_CLONED_FUNCTION_P (fndecl
))
14151 for (decl
= DECL_ARGUMENTS (fndecl
);
14153 decl
= DECL_CHAIN (decl
))
14154 if (TREE_USED (decl
)
14155 && TREE_CODE (decl
) == PARM_DECL
14156 && !DECL_READ_P (decl
)
14157 && DECL_NAME (decl
)
14158 && !DECL_ARTIFICIAL (decl
)
14159 && !TREE_NO_WARNING (decl
)
14160 && !DECL_IN_SYSTEM_HEADER (decl
)
14161 && TREE_TYPE (decl
) != error_mark_node
14162 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14163 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14164 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14165 warning (OPT_Wunused_but_set_parameter
,
14166 "parameter %q+D set but not used", decl
);
14167 unused_but_set_errorcount
= errorcount
;
14170 /* Complain about locally defined typedefs that are not used in this
14172 maybe_warn_unused_local_typedefs ();
14174 /* Genericize before inlining. */
14175 if (!processing_template_decl
)
14177 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14178 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14179 cp_genericize (fndecl
);
14180 /* Clear out the bits we don't need. */
14181 f
->x_current_class_ptr
= NULL
;
14182 f
->x_current_class_ref
= NULL
;
14183 f
->x_eh_spec_block
= NULL
;
14184 f
->x_in_charge_parm
= NULL
;
14185 f
->x_vtt_parm
= NULL
;
14186 f
->x_return_value
= NULL
;
14187 f
->bindings
= NULL
;
14188 f
->extern_decl_map
= NULL
;
14189 f
->infinite_loops
= NULL
;
14191 /* Clear out the bits we don't need. */
14192 local_names
= NULL
;
14194 /* We're leaving the context of this function, so zap cfun. It's still in
14195 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14197 current_function_decl
= NULL
;
14199 /* If this is an in-class inline definition, we may have to pop the
14200 bindings for the template parameters that we added in
14201 maybe_begin_member_template_processing when start_function was
14203 if (inclass_inline
)
14204 maybe_end_member_template_processing ();
14206 /* Leave the scope of the class. */
14208 pop_nested_class ();
14213 current_function_decl
= NULL_TREE
;
14215 defer_mark_used_calls
= false;
14216 if (deferred_mark_used_calls
)
14221 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14223 vec_free (deferred_mark_used_calls
);
14229 /* Create the FUNCTION_DECL for a function definition.
14230 DECLSPECS and DECLARATOR are the parts of the declaration;
14231 they describe the return type and the name of the function,
14232 but twisted together in a fashion that parallels the syntax of C.
14234 This function creates a binding context for the function body
14235 as well as setting up the FUNCTION_DECL in current_function_decl.
14237 Returns a FUNCTION_DECL on success.
14239 If the DECLARATOR is not suitable for a function (it defines a datum
14240 instead), we return 0, which tells yyparse to report a parse error.
14242 May return void_type_node indicating that this method is actually
14243 a friend. See grokfield for more details.
14245 Came here with a `.pushlevel' .
14247 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14248 CHANGES TO CODE IN `grokfield'. */
14251 grokmethod (cp_decl_specifier_seq
*declspecs
,
14252 const cp_declarator
*declarator
, tree attrlist
)
14254 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14257 if (fndecl
== error_mark_node
)
14258 return error_mark_node
;
14260 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14262 error ("invalid member function declaration");
14263 return error_mark_node
;
14267 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14269 /* Pass friends other than inline friend functions back. */
14270 if (fndecl
== void_type_node
)
14273 if (DECL_IN_AGGR_P (fndecl
))
14275 if (DECL_CLASS_SCOPE_P (fndecl
))
14276 error ("%qD is already defined in class %qT", fndecl
,
14277 DECL_CONTEXT (fndecl
));
14278 return error_mark_node
;
14281 check_template_shadow (fndecl
);
14283 DECL_COMDAT (fndecl
) = 1;
14284 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14285 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14287 /* We process method specializations in finish_struct_1. */
14288 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14290 fndecl
= push_template_decl (fndecl
);
14291 if (fndecl
== error_mark_node
)
14295 if (! DECL_FRIEND_P (fndecl
))
14297 if (DECL_CHAIN (fndecl
))
14299 fndecl
= copy_node (fndecl
);
14300 TREE_CHAIN (fndecl
) = NULL_TREE
;
14304 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14306 DECL_IN_AGGR_P (fndecl
) = 1;
14311 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14312 we can lay it out later, when and if its type becomes complete.
14314 Also handle constexpr variables where the initializer involves
14315 an unlowered PTRMEM_CST because the class isn't complete yet. */
14318 maybe_register_incomplete_var (tree var
)
14320 gcc_assert (VAR_P (var
));
14322 /* Keep track of variables with incomplete types. */
14323 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14324 && DECL_EXTERNAL (var
))
14326 tree inner_type
= TREE_TYPE (var
);
14328 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14329 inner_type
= TREE_TYPE (inner_type
);
14330 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14332 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14333 /* RTTI TD entries are created while defining the type_info. */
14334 || (TYPE_LANG_SPECIFIC (inner_type
)
14335 && TYPE_BEING_DEFINED (inner_type
)))
14337 incomplete_var iv
= {var
, inner_type
};
14338 vec_safe_push (incomplete_vars
, iv
);
14340 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14341 && decl_constant_var_p (var
)
14342 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14344 /* When the outermost open class is complete we can resolve any
14345 pointers-to-members. */
14346 tree context
= outermost_open_class ();
14347 incomplete_var iv
= {var
, context
};
14348 vec_safe_push (incomplete_vars
, iv
);
14353 /* Called when a class type (given by TYPE) is defined. If there are
14354 any existing VAR_DECLs whose type has been completed by this
14355 declaration, update them now. */
14358 complete_vars (tree type
)
14361 incomplete_var
*iv
;
14363 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14365 if (same_type_p (type
, iv
->incomplete_type
))
14367 tree var
= iv
->decl
;
14368 tree type
= TREE_TYPE (var
);
14370 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14371 == iv
->incomplete_type
)
14373 /* Complete the type of the variable. The VAR_DECL itself
14374 will be laid out in expand_expr. */
14375 complete_type (type
);
14376 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14379 if (DECL_INITIAL (var
)
14380 && decl_constant_var_p (var
))
14381 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14383 /* Remove this entry from the list. */
14384 incomplete_vars
->unordered_remove (ix
);
14390 /* Check for pending declarations which may have abstract type. */
14391 complete_type_check_abstract (type
);
14394 /* If DECL is of a type which needs a cleanup, build and return an
14395 expression to perform that cleanup here. Return NULL_TREE if no
14396 cleanup need be done. */
14399 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14405 /* Assume no cleanup is required. */
14406 cleanup
= NULL_TREE
;
14408 if (error_operand_p (decl
))
14411 /* Handle "__attribute__((cleanup))". We run the cleanup function
14412 before the destructor since the destructor is what actually
14413 terminates the lifetime of the object. */
14414 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14421 /* Get the name specified by the user for the cleanup function. */
14422 id
= TREE_VALUE (TREE_VALUE (attr
));
14423 /* Look up the name to find the cleanup function to call. It is
14424 important to use lookup_name here because that is what is
14425 used in c-common.c:handle_cleanup_attribute when performing
14426 initial checks on the attribute. Note that those checks
14427 include ensuring that the function found is not an overloaded
14428 function, or an object with an overloaded call operator,
14429 etc.; we can rely on the fact that the function found is an
14430 ordinary FUNCTION_DECL. */
14431 fn
= lookup_name (id
);
14432 arg
= build_address (decl
);
14434 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14435 if (cleanup
== error_mark_node
)
14436 return error_mark_node
;
14438 /* Handle ordinary C++ destructors. */
14439 type
= TREE_TYPE (decl
);
14440 if (type_build_dtor_call (type
))
14442 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14446 if (TREE_CODE (type
) == ARRAY_TYPE
)
14449 addr
= build_address (decl
);
14451 call
= build_delete (TREE_TYPE (addr
), addr
,
14452 sfk_complete_destructor
, flags
, 0, complain
);
14453 if (call
== error_mark_node
)
14454 cleanup
= error_mark_node
;
14455 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14456 /* Discard the call. */;
14458 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14463 /* build_delete sets the location of the destructor call to the
14464 current location, even though the destructor is going to be
14465 called later, at the end of the current scope. This can lead to
14466 a "jumpy" behaviour for users of debuggers when they step around
14467 the end of the block. So let's unset the location of the
14468 destructor call instead. */
14469 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14470 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14473 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14474 /* Treat objects with destructors as used; the destructor may do
14475 something substantive. */
14482 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14483 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14484 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14487 static_fn_type (tree memfntype
)
14492 if (TYPE_PTRMEMFUNC_P (memfntype
))
14493 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14494 if (POINTER_TYPE_P (memfntype
)
14495 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14496 memfntype
= TREE_TYPE (memfntype
);
14497 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14499 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14500 args
= TYPE_ARG_TYPES (memfntype
);
14501 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14502 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14503 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14504 fntype
= (cp_build_type_attribute_variant
14505 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14506 fntype
= (build_exception_variant
14507 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14508 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14509 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14513 /* DECL was originally constructed as a non-static member function,
14514 but turned out to be static. Update it accordingly. */
14517 revert_static_member_fn (tree decl
)
14519 tree stype
= static_fn_type (decl
);
14520 cp_cv_quals quals
= type_memfn_quals (stype
);
14521 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14523 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14524 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14526 TREE_TYPE (decl
) = stype
;
14528 if (DECL_ARGUMENTS (decl
))
14529 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14530 DECL_STATIC_FUNCTION_P (decl
) = 1;
14533 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14534 one of the language-independent trees. */
14536 enum cp_tree_node_structure_enum
14537 cp_tree_node_structure (union lang_tree_node
* t
)
14539 switch (TREE_CODE (&t
->generic
))
14541 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14542 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14543 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14544 case OVERLOAD
: return TS_CP_OVERLOAD
;
14545 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14546 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14547 case BASELINK
: return TS_CP_BASELINK
;
14548 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14549 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14550 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14551 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14552 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14553 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14554 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14555 default: return TS_CP_GENERIC
;
14559 /* Build the void_list_node (void_type_node having been created). */
14561 build_void_list_node (void)
14563 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14568 cp_missing_noreturn_ok_p (tree decl
)
14570 /* A missing noreturn is ok for the `main' function. */
14571 return DECL_MAIN_P (decl
);
14574 /* Return the decl used to identify the COMDAT group into which DECL should
14578 cxx_comdat_group (tree decl
)
14580 /* Virtual tables, construction virtual tables, and virtual table
14581 tables all go in a single COMDAT group, named after the primary
14583 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14584 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14585 /* For all other DECLs, the COMDAT group is the mangled name of the
14586 declaration itself. */
14589 while (DECL_THUNK_P (decl
))
14591 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14592 into the same section as the target function. In that case
14593 we must return target's name. */
14594 tree target
= THUNK_TARGET (decl
);
14595 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14596 && DECL_SECTION_NAME (target
) != NULL
14597 && DECL_ONE_ONLY (target
))
14607 /* Returns the return type for FN as written by the user, which may include
14608 a placeholder for a deduced return type. */
14611 fndecl_declared_return_type (tree fn
)
14613 fn
= STRIP_TEMPLATE (fn
);
14614 if (FNDECL_USED_AUTO (fn
))
14616 struct language_function
*f
= NULL
;
14617 if (DECL_STRUCT_FUNCTION (fn
))
14618 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14620 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14621 return f
->x_auto_return_pattern
;
14623 return TREE_TYPE (TREE_TYPE (fn
));
14626 /* Returns true iff DECL was declared with an auto return type and it has
14627 not yet been deduced to a real type. */
14630 undeduced_auto_decl (tree decl
)
14632 if (cxx_dialect
< cxx14
)
14634 return type_uses_auto (TREE_TYPE (decl
));
14637 /* Complain if DECL has an undeduced return type. */
14640 require_deduced_type (tree decl
)
14642 if (undeduced_auto_decl (decl
))
14643 error ("use of %qD before deduction of %<auto%>", decl
);
14646 #include "gt-cp-decl.h"