1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
46 #include "c-family/c-common.h"
47 #include "c-family/c-objc.h"
48 #include "c-family/c-pragma.h"
49 #include "diagnostic.h"
53 #include "pointer-set.h"
54 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR
, /* variable */
61 BSP_PARM
, /* parameter */
66 static tree
grokparms (tree parmlist
, tree
*);
67 static const char *redeclaration_error_message (tree
, tree
);
69 static int decl_jump_unsafe (tree
);
70 static void require_complete_types_for_parms (tree
);
71 static int ambi_op_p (enum tree_code
);
72 static int unary_op_p (enum tree_code
);
73 static void push_local_name (tree
);
74 static tree
grok_reference_init (tree
, tree
, tree
, int);
75 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
77 static int check_static_variable_definition (tree
, tree
);
78 static void record_unknown_type (tree
, const char *);
79 static tree
builtin_function_1 (tree
, tree
, bool);
80 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
81 static int member_function_or_else (tree
, tree
, enum overload_flags
);
82 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
84 static void check_for_uninitialized_const_var (tree
);
85 static hashval_t
typename_hash (const void *);
86 static int typename_compare (const void *, const void *);
87 static tree
local_variable_p_walkfn (tree
*, int *, void *);
88 static tree
record_builtin_java_type (const char *, int);
89 static const char *tag_name (enum tag_types
);
90 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
91 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
92 static void maybe_deduce_size_from_array_init (tree
, tree
);
93 static void layout_var_decl (tree
);
94 static tree
check_initializer (tree
, tree
, int, VEC(tree
,gc
) **);
95 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
96 static void save_function_data (tree
);
97 static void copy_type_enum (tree
, tree
);
98 static void check_function_type (tree
, tree
);
99 static void finish_constructor_body (void);
100 static void begin_destructor_body (void);
101 static void finish_destructor_body (void);
102 static void record_key_method_defined (tree
);
103 static tree
create_array_type_for_decl (tree
, tree
, tree
);
104 static tree
get_atexit_node (void);
105 static tree
get_dso_handle_node (void);
106 static tree
start_cleanup_fn (void);
107 static void end_cleanup_fn (void);
108 static tree
cp_make_fname_decl (location_t
, tree
, int);
109 static void initialize_predefined_identifiers (void);
110 static tree check_special_function_return_type
111 (special_function_kind
, tree
, tree
);
112 static tree
push_cp_library_fn (enum tree_code
, tree
);
113 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
114 static void store_parm_decls (tree
);
115 static void initialize_local_var (tree
, tree
);
116 static void expand_static_init (tree
, tree
);
118 /* The following symbols are subsumed in the cp_global_trees array, and
119 listed here individually for documentation purposes.
122 tree wchar_decl_node;
124 tree vtable_entry_type;
125 tree delta_type_node;
126 tree __t_desc_type_node;
128 tree class_type_node;
129 tree unknown_type_node;
131 Array type `vtable_entry_type[]'
134 tree vtbl_ptr_type_node;
141 A FUNCTION_DECL which can call `abort'. Not necessarily the
142 one that the user will declare, but sufficient to be called
143 by routines that want to abort the program.
147 The FUNCTION_DECL for the default `::operator delete'.
149 tree global_delete_fndecl;
152 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
153 tree tinfo_var_id; */
155 tree cp_global_trees
[CPTI_MAX
];
157 /* Indicates that there is a type value in some namespace, although
158 that is not necessarily in scope at the moment. */
160 tree global_type_node
;
162 /* The node that holds the "name" of the global scope. */
163 tree global_scope_name
;
165 #define local_names cp_function_chain->x_local_names
167 /* A list of objects which have constructors or destructors
168 which reside in the global scope. The decl is stored in
169 the TREE_VALUE slot and the initializer is stored
170 in the TREE_PURPOSE slot. */
171 tree static_aggregates
;
173 /* Like static_aggregates, but for thread_local variables. */
178 /* A node for the integer constant 2. */
180 tree integer_two_node
;
182 /* Used only for jumps to as-yet undefined labels, since jumps to
183 defined labels can have their validity checked immediately. */
185 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
186 struct named_label_use_entry
*next
;
187 /* The binding level to which this entry is *currently* attached.
188 This is initially the binding level in which the goto appeared,
189 but is modified as scopes are closed. */
190 cp_binding_level
*binding_level
;
191 /* The head of the names list that was current when the goto appeared,
192 or the inner scope popped. These are the decls that will *not* be
193 skipped when jumping to the label. */
195 /* The location of the goto, for error reporting. */
196 location_t o_goto_locus
;
197 /* True if an OpenMP structured block scope has been closed since
198 the goto appeared. This means that the branch from the label will
199 illegally exit an OpenMP scope. */
203 /* A list of all LABEL_DECLs in the function that have names. Here so
204 we can clear out their names' definitions at the end of the
205 function, and so we can check the validity of jumps to these labels. */
207 struct GTY(()) named_label_entry
{
208 /* The decl itself. */
211 /* The binding level to which the label is *currently* attached.
212 This is initially set to the binding level in which the label
213 is defined, but is modified as scopes are closed. */
214 cp_binding_level
*binding_level
;
215 /* The head of the names list that was current when the label was
216 defined, or the inner scope popped. These are the decls that will
217 be skipped when jumping to the label. */
219 /* A vector of all decls from all binding levels that would be
220 crossed by a backward branch to the label. */
221 VEC(tree
,gc
) *bad_decls
;
223 /* A list of uses of the label, before the label is defined. */
224 struct named_label_use_entry
*uses
;
226 /* The following bits are set after the label is defined, and are
227 updated as scopes are popped. They indicate that a backward jump
228 to the label will illegally enter a scope of the given flavor. */
234 #define named_labels cp_function_chain->x_named_labels
236 /* The number of function bodies which we are currently processing.
237 (Zero if we are at namespace scope, one inside the body of a
238 function, two inside the body of a function in a local class, etc.) */
241 /* To avoid unwanted recursion, finish_function defers all mark_used calls
242 encountered during its execution until it finishes. */
243 bool defer_mark_used_calls
;
244 VEC(tree
, gc
) *deferred_mark_used_calls
;
246 /* States indicating how grokdeclarator() should handle declspecs marked
247 with __attribute__((deprecated)). An object declared as
248 __attribute__((deprecated)) suppresses warnings of uses of other
250 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
253 /* A list of VAR_DECLs whose type was incomplete at the time the
254 variable was declared. */
256 typedef struct GTY(()) incomplete_var_d
{
258 tree incomplete_type
;
261 DEF_VEC_O(incomplete_var
);
262 DEF_VEC_ALLOC_O(incomplete_var
,gc
);
264 static GTY(()) VEC(incomplete_var
,gc
) *incomplete_vars
;
266 /* Returns the kind of template specialization we are currently
267 processing, given that it's declaration contained N_CLASS_SCOPES
268 explicit scope qualifications. */
271 current_tmpl_spec_kind (int n_class_scopes
)
273 int n_template_parm_scopes
= 0;
274 int seen_specialization_p
= 0;
275 int innermost_specialization_p
= 0;
278 /* Scan through the template parameter scopes. */
279 for (b
= current_binding_level
;
280 b
->kind
== sk_template_parms
;
283 /* If we see a specialization scope inside a parameter scope,
284 then something is wrong. That corresponds to a declaration
287 template <class T> template <> ...
289 which is always invalid since [temp.expl.spec] forbids the
290 specialization of a class member template if the enclosing
291 class templates are not explicitly specialized as well. */
292 if (b
->explicit_spec_p
)
294 if (n_template_parm_scopes
== 0)
295 innermost_specialization_p
= 1;
297 seen_specialization_p
= 1;
299 else if (seen_specialization_p
== 1)
300 return tsk_invalid_member_spec
;
302 ++n_template_parm_scopes
;
305 /* Handle explicit instantiations. */
306 if (processing_explicit_instantiation
)
308 if (n_template_parm_scopes
!= 0)
309 /* We've seen a template parameter list during an explicit
310 instantiation. For example:
312 template <class T> template void f(int);
314 This is erroneous. */
315 return tsk_invalid_expl_inst
;
317 return tsk_expl_inst
;
320 if (n_template_parm_scopes
< n_class_scopes
)
321 /* We've not seen enough template headers to match all the
322 specialized classes present. For example:
324 template <class T> void R<T>::S<T>::f(int);
326 This is invalid; there needs to be one set of template
327 parameters for each class. */
328 return tsk_insufficient_parms
;
329 else if (n_template_parm_scopes
== n_class_scopes
)
330 /* We're processing a non-template declaration (even though it may
331 be a member of a template class.) For example:
333 template <class T> void S<T>::f(int);
335 The `class T' matches the `S<T>', leaving no template headers
336 corresponding to the `f'. */
338 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
339 /* We've got too many template headers. For example:
341 template <> template <class T> void f (T);
343 There need to be more enclosing classes. */
344 return tsk_excessive_parms
;
346 /* This must be a template. It's of the form:
348 template <class T> template <class U> void S<T>::f(U);
350 This is a specialization if the innermost level was a
351 specialization; otherwise it's just a definition of the
353 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
356 /* Exit the current scope. */
364 /* When a label goes out of scope, check to see if that label was used
365 in a valid manner, and issue any appropriate warnings or errors. */
368 pop_label (tree label
, tree old_value
)
370 if (!processing_template_decl
)
372 if (DECL_INITIAL (label
) == NULL_TREE
)
376 error ("label %q+D used but not defined", label
);
377 location
= input_location
; /* FIXME want (input_filename, (line)0) */
378 /* Avoid crashing later. */
379 define_label (location
, DECL_NAME (label
));
382 warn_for_unused_label (label
);
385 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
388 /* At the end of a function, all labels declared within the function
389 go out of scope. BLOCK is the top-level block for the
393 pop_labels_1 (void **slot
, void *data
)
395 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
396 tree block
= (tree
) data
;
398 pop_label (ent
->label_decl
, NULL_TREE
);
400 /* Put the labels into the "variables" of the top-level block,
401 so debugger can see them. */
402 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
403 BLOCK_VARS (block
) = ent
->label_decl
;
405 htab_clear_slot (named_labels
, slot
);
411 pop_labels (tree block
)
415 htab_traverse (named_labels
, pop_labels_1
, block
);
420 /* At the end of a block with local labels, restore the outer definition. */
423 pop_local_label (tree label
, tree old_value
)
425 struct named_label_entry dummy
;
428 pop_label (label
, old_value
);
430 dummy
.label_decl
= label
;
431 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
432 htab_clear_slot (named_labels
, slot
);
435 /* The following two routines are used to interface to Objective-C++.
436 The binding level is purposely treated as an opaque type. */
439 objc_get_current_scope (void)
441 return current_binding_level
;
444 /* The following routine is used by the NeXT-style SJLJ exceptions;
445 variables get marked 'volatile' so as to not be clobbered by
446 _setjmp()/_longjmp() calls. All variables in the current scope,
447 as well as parent scopes up to (but not including) ENCLOSING_BLK
448 shall be thusly marked. */
451 objc_mark_locals_volatile (void *enclosing_blk
)
453 cp_binding_level
*scope
;
455 for (scope
= current_binding_level
;
456 scope
&& scope
!= enclosing_blk
;
457 scope
= scope
->level_chain
)
461 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
462 objc_volatilize_decl (decl
);
464 /* Do not climb up past the current function. */
465 if (scope
->kind
== sk_function_parms
)
470 /* Update data for defined and undefined labels when leaving a scope. */
473 poplevel_named_label_1 (void **slot
, void *data
)
475 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
476 cp_binding_level
*bl
= (cp_binding_level
*) data
;
477 cp_binding_level
*obl
= bl
->level_chain
;
479 if (ent
->binding_level
== bl
)
483 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
484 TREE_LISTs representing OVERLOADs, so be careful. */
485 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
487 : TREE_CHAIN (decl
)))
488 if (decl_jump_unsafe (decl
))
489 VEC_safe_push (tree
, gc
, ent
->bad_decls
, decl
);
491 ent
->binding_level
= obl
;
492 ent
->names_in_scope
= obl
->names
;
496 ent
->in_try_scope
= true;
499 ent
->in_catch_scope
= true;
502 ent
->in_omp_scope
= true;
510 struct named_label_use_entry
*use
;
512 for (use
= ent
->uses
; use
; use
= use
->next
)
513 if (use
->binding_level
== bl
)
515 use
->binding_level
= obl
;
516 use
->names_in_scope
= obl
->names
;
517 if (bl
->kind
== sk_omp
)
518 use
->in_omp_scope
= true;
525 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
526 when errors were reported, except for -Werror-unused-but-set-*. */
527 static int unused_but_set_errorcount
;
529 /* Exit a binding level.
530 Pop the level off, and restore the state of the identifier-decl mappings
531 that were in effect when this level was entered.
533 If KEEP == 1, this level had explicit declarations, so
534 and create a "block" (a BLOCK node) for the level
535 to record its declarations and subblocks for symbol table output.
537 If FUNCTIONBODY is nonzero, this level is the body of a function,
538 so create a block as if KEEP were set and also clear out all
541 If REVERSE is nonzero, reverse the order of decls before putting
542 them into the BLOCK. */
545 poplevel (int keep
, int reverse
, int functionbody
)
548 /* The chain of decls was accumulated in reverse order.
549 Put it into forward order, just for cleanliness. */
554 int leaving_for_scope
;
557 cp_label_binding
*label_bind
;
559 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
564 gcc_assert (current_binding_level
->kind
!= sk_class
);
566 if (current_binding_level
->kind
== sk_cleanup
)
568 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
570 gcc_assert (!VEC_length(cp_class_binding
,
571 current_binding_level
->class_shadowed
));
573 /* We used to use KEEP == 2 to indicate that the new block should go
574 at the beginning of the list of blocks at this binding level,
575 rather than the end. This hack is no longer used. */
576 gcc_assert (keep
== 0 || keep
== 1);
578 if (current_binding_level
->keep
)
581 /* Any uses of undefined labels, and any defined labels, now operate
582 under constraints of next binding contour. */
583 if (cfun
&& !functionbody
&& named_labels
)
584 htab_traverse (named_labels
, poplevel_named_label_1
,
585 current_binding_level
);
587 /* Get the decls in the order they were written.
588 Usually current_binding_level->names is in reverse order.
589 But parameter decls were previously put in forward order. */
592 current_binding_level
->names
593 = decls
= nreverse (current_binding_level
->names
);
595 decls
= current_binding_level
->names
;
597 /* If there were any declarations or structure tags in that level,
598 or if this level is a function body,
599 create a BLOCK to record them for the life of this function. */
601 if (keep
== 1 || functionbody
)
602 block
= make_node (BLOCK
);
603 if (block
!= NULL_TREE
)
605 BLOCK_VARS (block
) = decls
;
606 BLOCK_SUBBLOCKS (block
) = subblocks
;
609 /* In each subblock, record that this is its superior. */
611 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
612 BLOCK_SUPERCONTEXT (link
) = block
;
614 /* We still support the old for-scope rules, whereby the variables
615 in a for-init statement were in scope after the for-statement
616 ended. We only use the new rules if flag_new_for_scope is
619 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
621 /* Before we remove the declarations first check for unused variables. */
622 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
623 && !processing_template_decl
)
624 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
626 /* There are cases where D itself is a TREE_LIST. See in
627 push_local_binding where the list of decls returned by
628 getdecls is built. */
629 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
630 if (TREE_CODE (decl
) == VAR_DECL
631 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
632 && ! DECL_IN_SYSTEM_HEADER (decl
)
633 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
634 && TREE_TYPE (decl
) != error_mark_node
635 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
636 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
638 if (! TREE_USED (decl
))
639 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
640 else if (DECL_CONTEXT (decl
) == current_function_decl
641 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
642 && errorcount
== unused_but_set_errorcount
)
644 warning (OPT_Wunused_but_set_variable
,
645 "variable %q+D set but not used", decl
);
646 unused_but_set_errorcount
= errorcount
;
651 /* Remove declarations for all the DECLs in this level. */
652 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
654 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
655 /* It's hard to make this ARM compatibility hack play nicely with
656 lambdas, and it really isn't necessary in C++11 mode. */
657 && cxx_dialect
< cxx0x
660 tree name
= DECL_NAME (link
);
664 ob
= outer_binding (name
,
665 IDENTIFIER_BINDING (name
),
668 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
670 ns_binding
= NULL_TREE
;
672 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
673 /* We have something like:
678 and we are leaving the `for' scope. There's no reason to
679 keep the binding of the inner `i' in this case. */
680 pop_binding (name
, link
);
681 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
682 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
683 /* Here, we have something like:
691 We must pop the for-scope binding so we know what's a
692 type and what isn't. */
693 pop_binding (name
, link
);
696 /* Mark this VAR_DECL as dead so that we can tell we left it
697 there only for backward compatibility. */
698 DECL_DEAD_FOR_LOCAL (link
) = 1;
700 /* Keep track of what should have happened when we
701 popped the binding. */
704 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
705 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
708 /* Add it to the list of dead variables in the next
709 outermost binding to that we can remove these when we
710 leave that binding. */
711 VEC_safe_push (tree
, gc
,
712 current_binding_level
->level_chain
->dead_vars_from_for
,
715 /* Although we don't pop the cxx_binding, we do clear
716 its SCOPE since the scope is going away now. */
717 IDENTIFIER_BINDING (name
)->scope
718 = current_binding_level
->level_chain
;
725 /* Remove the binding. */
728 if (TREE_CODE (decl
) == TREE_LIST
)
729 decl
= TREE_VALUE (decl
);
732 if (TREE_CODE (name
) == OVERLOAD
)
733 name
= OVL_FUNCTION (name
);
735 gcc_assert (DECL_P (name
));
736 pop_binding (DECL_NAME (name
), decl
);
740 /* Remove declarations for any `for' variables from inner scopes
741 that we kept around. */
742 FOR_EACH_VEC_ELT_REVERSE (tree
, current_binding_level
->dead_vars_from_for
,
744 pop_binding (DECL_NAME (decl
), decl
);
746 /* Restore the IDENTIFIER_TYPE_VALUEs. */
747 for (link
= current_binding_level
->type_shadowed
;
748 link
; link
= TREE_CHAIN (link
))
749 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
751 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
752 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding
,
753 current_binding_level
->shadowed_labels
,
755 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
757 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
758 list if a `using' declaration put them there. The debugging
759 back ends won't understand OVERLOAD, so we remove them here.
760 Because the BLOCK_VARS are (temporarily) shared with
761 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
762 popped all the bindings. */
767 for (d
= &BLOCK_VARS (block
); *d
; )
769 if (TREE_CODE (*d
) == TREE_LIST
)
770 *d
= TREE_CHAIN (*d
);
772 d
= &DECL_CHAIN (*d
);
776 /* If the level being exited is the top level of a function,
777 check over all the labels. */
780 /* Since this is the top level block of a function, the vars are
781 the function's parameters. Don't leave them in the BLOCK
782 because they are found in the FUNCTION_DECL instead. */
783 BLOCK_VARS (block
) = 0;
787 kind
= current_binding_level
->kind
;
788 if (kind
== sk_cleanup
)
792 /* If this is a temporary binding created for a cleanup, then we'll
793 have pushed a statement list level. Pop that, create a new
794 BIND_EXPR for the block, and insert it into the stream. */
795 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
796 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
803 /* The current function is being defined, so its DECL_INITIAL
804 should be error_mark_node. */
805 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
806 DECL_INITIAL (current_function_decl
) = block
;
809 current_binding_level
->blocks
810 = block_chainon (current_binding_level
->blocks
, block
);
812 /* If we did not make a block for the level just exited,
813 any blocks made for inner levels
814 (since they cannot be recorded as subblocks in that level)
815 must be carried forward so they will later become subblocks
816 of something else. */
818 current_binding_level
->blocks
819 = block_chainon (current_binding_level
->blocks
, subblocks
);
821 /* Each and every BLOCK node created here in `poplevel' is important
822 (e.g. for proper debugging information) so if we created one
823 earlier, mark it as "used". */
825 TREE_USED (block
) = 1;
827 /* All temporary bindings created for cleanups are popped silently. */
828 if (kind
== sk_cleanup
)
831 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
835 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
836 itself, calling F for each. The DATA is passed to F as well. */
839 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
842 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
844 result
|= (*f
) (name_space
, data
);
846 for (; current
; current
= DECL_CHAIN (current
))
847 result
|= walk_namespaces_r (current
, f
, data
);
852 /* Walk all the namespaces, calling F for each. The DATA is passed to
856 walk_namespaces (walk_namespaces_fn f
, void* data
)
858 return walk_namespaces_r (global_namespace
, f
, data
);
861 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
862 DATA is non-NULL, this is the last time we will call
863 wrapup_global_declarations for this NAMESPACE. */
866 wrapup_globals_for_namespace (tree name_space
, void* data
)
868 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
869 VEC(tree
,gc
) *statics
= level
->static_decls
;
870 tree
*vec
= VEC_address (tree
, statics
);
871 int len
= VEC_length (tree
, statics
);
872 int last_time
= (data
!= 0);
876 check_global_declarations (vec
, len
);
877 emit_debug_global_declarations (vec
, len
);
881 /* Write out any globals that need to be output. */
882 return wrapup_global_declarations (vec
, len
);
886 /* In C++, you don't have to write `struct S' to refer to `S'; you
887 can just use `S'. We accomplish this by creating a TYPE_DECL as
888 if the user had written `typedef struct S S'. Create and return
889 the TYPE_DECL for TYPE. */
892 create_implicit_typedef (tree name
, tree type
)
896 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
897 DECL_ARTIFICIAL (decl
) = 1;
898 /* There are other implicit type declarations, like the one *within*
899 a class that allows you to write `S::S'. We must distinguish
901 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
902 TYPE_NAME (type
) = decl
;
903 TYPE_STUB_DECL (type
) = decl
;
908 /* Remember a local name for name-mangling purposes. */
911 push_local_name (tree decl
)
916 timevar_start (TV_NAME_LOOKUP
);
918 name
= DECL_NAME (decl
);
920 nelts
= VEC_length (tree
, local_names
);
921 for (i
= 0; i
< nelts
; i
++)
923 t
= VEC_index (tree
, local_names
, i
);
924 if (DECL_NAME (t
) == name
)
926 if (!DECL_LANG_SPECIFIC (decl
))
927 retrofit_lang_decl (decl
);
928 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
929 if (DECL_LANG_SPECIFIC (t
))
930 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
932 DECL_DISCRIMINATOR (decl
) = 1;
934 VEC_replace (tree
, local_names
, i
, decl
);
935 timevar_stop (TV_NAME_LOOKUP
);
940 VEC_safe_push (tree
, gc
, local_names
, decl
);
941 timevar_stop (TV_NAME_LOOKUP
);
944 /* Subroutine of duplicate_decls: return truthvalue of whether
945 or not types of these decls match.
947 For C++, we must compare the parameter list so that `int' can match
948 `int&' in a parameter position, but `int&' is not confused with
952 decls_match (tree newdecl
, tree olddecl
)
956 if (newdecl
== olddecl
)
959 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
960 /* If the two DECLs are not even the same kind of thing, we're not
961 interested in their types. */
964 gcc_assert (DECL_P (newdecl
));
966 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
968 tree f1
= TREE_TYPE (newdecl
);
969 tree f2
= TREE_TYPE (olddecl
);
970 tree p1
= TYPE_ARG_TYPES (f1
);
971 tree p2
= TYPE_ARG_TYPES (f2
);
974 /* Specializations of different templates are different functions
975 even if they have the same type. */
976 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
977 ? DECL_TI_TEMPLATE (newdecl
)
979 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
980 ? DECL_TI_TEMPLATE (olddecl
)
985 /* The decls dont match if they correspond to two different versions
986 of the same function. Disallow extern "C" functions to be
988 if (compparms (p1
, p2
)
989 && same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
))
990 && !DECL_EXTERN_C_P (newdecl
)
991 && !DECL_EXTERN_C_P (olddecl
)
992 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
994 /* Mark functions as versions if necessary. Modify the mangled decl
995 name if necessary. */
996 if (DECL_FUNCTION_VERSIONED (newdecl
)
997 && DECL_FUNCTION_VERSIONED (olddecl
))
999 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1001 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1002 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1003 mangle_decl (newdecl
);
1005 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1007 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1008 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1009 mangle_decl (olddecl
);
1011 record_function_versions (olddecl
, newdecl
);
1015 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1016 && ! (DECL_EXTERN_C_P (newdecl
)
1017 && DECL_EXTERN_C_P (olddecl
)))
1020 #ifdef NO_IMPLICIT_EXTERN_C
1021 /* A new declaration doesn't match a built-in one unless it
1022 is also extern "C". */
1023 if (DECL_IS_BUILTIN (olddecl
)
1024 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1028 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1031 /* A declaration with deduced return type should use its pre-deduction
1032 type for declaration matching. */
1033 if (FNDECL_USED_AUTO (olddecl
))
1034 r2
= DECL_STRUCT_FUNCTION (olddecl
)->language
->x_auto_return_pattern
;
1036 r2
= TREE_TYPE (f2
);
1038 if (same_type_p (TREE_TYPE (f1
), r2
))
1040 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1041 && (DECL_BUILT_IN (olddecl
)
1042 #ifndef NO_IMPLICIT_EXTERN_C
1043 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1044 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1048 types_match
= self_promoting_args_p (p1
);
1049 if (p1
== void_list_node
)
1050 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1052 #ifndef NO_IMPLICIT_EXTERN_C
1053 else if (!prototype_p (f1
)
1054 && (DECL_EXTERN_C_P (olddecl
)
1055 && DECL_IN_SYSTEM_HEADER (olddecl
)
1056 && !DECL_CLASS_SCOPE_P (olddecl
))
1057 && (DECL_EXTERN_C_P (newdecl
)
1058 && DECL_IN_SYSTEM_HEADER (newdecl
)
1059 && !DECL_CLASS_SCOPE_P (newdecl
)))
1061 types_match
= self_promoting_args_p (p2
);
1062 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1068 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1069 || comp_type_attributes (TREE_TYPE (newdecl
),
1070 TREE_TYPE (olddecl
)) != 0);
1075 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1077 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1078 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1081 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1082 DECL_TEMPLATE_PARMS (olddecl
)))
1085 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1086 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1087 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1089 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1090 DECL_TEMPLATE_RESULT (newdecl
));
1094 /* Need to check scope for variable declaration (VAR_DECL).
1095 For typedef (TYPE_DECL), scope is ignored. */
1096 if (TREE_CODE (newdecl
) == VAR_DECL
1097 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1099 Two declarations for an object with C language linkage
1100 with the same name (ignoring the namespace that qualify
1101 it) that appear in different namespace scopes refer to
1103 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1106 if (TREE_TYPE (newdecl
) == error_mark_node
)
1107 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1108 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1109 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1110 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1113 types_match
= comptypes (TREE_TYPE (newdecl
),
1114 TREE_TYPE (olddecl
),
1115 COMPARE_REDECLARATION
);
1121 /* If NEWDECL is `static' and an `extern' was seen previously,
1122 warn about it. OLDDECL is the previous declaration.
1124 Note that this does not apply to the C++ case of declaring
1125 a variable `extern const' and then later `const'.
1127 Don't complain about built-in functions, since they are beyond
1128 the user's control. */
1131 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1133 if (TREE_CODE (newdecl
) == TYPE_DECL
1134 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1135 || TREE_CODE (newdecl
) == CONST_DECL
1136 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1139 /* Don't get confused by static member functions; that's a different
1141 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1142 && DECL_STATIC_FUNCTION_P (newdecl
))
1145 /* If the old declaration was `static', or the new one isn't, then
1146 everything is OK. */
1147 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1150 /* It's OK to declare a builtin function as `static'. */
1151 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1152 && DECL_ARTIFICIAL (olddecl
))
1155 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1156 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1159 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1160 function templates. If their exception specifications do not
1161 match, issue a diagnostic. */
1164 check_redeclaration_exception_specification (tree new_decl
,
1169 tree new_exceptions
;
1170 tree old_exceptions
;
1172 new_type
= TREE_TYPE (new_decl
);
1173 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1174 old_type
= TREE_TYPE (old_decl
);
1175 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1179 If any declaration of a function has an exception-specification,
1180 all declarations, including the definition and an explicit
1181 specialization, of that function shall have an
1182 exception-specification with the same set of type-ids. */
1183 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1184 && ! DECL_IS_BUILTIN (old_decl
)
1186 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1188 error ("declaration of %qF has a different exception specifier",
1190 error ("from previous declaration %q+F", old_decl
);
1194 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1195 Otherwise issue diagnostics. */
1198 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1200 old_decl
= STRIP_TEMPLATE (old_decl
);
1201 new_decl
= STRIP_TEMPLATE (new_decl
);
1202 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1203 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1205 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1206 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1208 if (TREE_CODE (old_decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (old_decl
))
1210 /* Hide a built-in declaration. */
1211 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1212 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1215 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1216 error ("from previous declaration %q+D", old_decl
);
1220 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1221 && lookup_attribute ("gnu_inline", \
1222 DECL_ATTRIBUTES (fn)))
1224 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1225 If the redeclaration is invalid, a diagnostic is issued, and the
1226 error_mark_node is returned. Otherwise, OLDDECL is returned.
1228 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1231 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1234 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1236 unsigned olddecl_uid
= DECL_UID (olddecl
);
1237 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1238 int new_defines_function
= 0;
1239 tree new_template_info
;
1241 if (newdecl
== olddecl
)
1244 types_match
= decls_match (newdecl
, olddecl
);
1246 /* If either the type of the new decl or the type of the old decl is an
1247 error_mark_node, then that implies that we have already issued an
1248 error (earlier) for some bogus type specification, and in that case,
1249 it is rather pointless to harass the user with yet more error message
1250 about the same declaration, so just pretend the types match here. */
1251 if (TREE_TYPE (newdecl
) == error_mark_node
1252 || TREE_TYPE (olddecl
) == error_mark_node
)
1253 return error_mark_node
;
1255 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1256 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1258 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1259 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1260 && check_raw_literal_operator (olddecl
))
1261 error ("literal operator template %q+D conflicts with"
1262 " raw literal operator %qD", newdecl
, olddecl
);
1263 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1264 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1265 && check_raw_literal_operator (newdecl
))
1266 error ("raw literal operator %q+D conflicts with"
1267 " literal operator template %qD", newdecl
, olddecl
);
1270 if (DECL_P (olddecl
)
1271 && TREE_CODE (newdecl
) == FUNCTION_DECL
1272 && TREE_CODE (olddecl
) == FUNCTION_DECL
1273 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1275 if (DECL_DECLARED_INLINE_P (newdecl
)
1276 && DECL_UNINLINABLE (newdecl
)
1277 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1278 /* Already warned elsewhere. */;
1279 else if (DECL_DECLARED_INLINE_P (olddecl
)
1280 && DECL_UNINLINABLE (olddecl
)
1281 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1282 /* Already warned. */;
1283 else if (DECL_DECLARED_INLINE_P (newdecl
)
1284 && DECL_UNINLINABLE (olddecl
)
1285 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1287 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1289 warning (OPT_Wattributes
, "previous declaration of %q+D "
1290 "with attribute noinline", olddecl
);
1292 else if (DECL_DECLARED_INLINE_P (olddecl
)
1293 && DECL_UNINLINABLE (newdecl
)
1294 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1296 warning (OPT_Wattributes
, "function %q+D redeclared with "
1297 "attribute noinline", newdecl
);
1298 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1303 /* Check for redeclaration and other discrepancies. */
1304 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1305 && DECL_ARTIFICIAL (olddecl
))
1307 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1308 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1310 /* Avoid warnings redeclaring built-ins which have not been
1311 explicitly declared. */
1312 if (DECL_ANTICIPATED (olddecl
))
1315 /* If you declare a built-in or predefined function name as static,
1316 the old definition is overridden, but optionally warn this was a
1317 bad choice of name. */
1318 if (! TREE_PUBLIC (newdecl
))
1320 warning (OPT_Wshadow
,
1321 DECL_BUILT_IN (olddecl
)
1322 ? G_("shadowing built-in function %q#D")
1323 : G_("shadowing library function %q#D"), olddecl
);
1324 /* Discard the old built-in function. */
1327 /* If the built-in is not ansi, then programs can override
1328 it even globally without an error. */
1329 else if (! DECL_BUILT_IN (olddecl
))
1330 warning (0, "library function %q#D redeclared as non-function %q#D",
1334 error ("declaration of %q#D", newdecl
);
1335 error ("conflicts with built-in declaration %q#D",
1340 else if (!types_match
)
1342 /* Avoid warnings redeclaring built-ins which have not been
1343 explicitly declared. */
1344 if (DECL_ANTICIPATED (olddecl
))
1346 /* Deal with fileptr_type_node. FILE type is not known
1347 at the time we create the builtins. */
1350 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1351 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1353 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1356 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1358 tree t
= TREE_VALUE (t1
);
1360 if (TREE_CODE (t
) == POINTER_TYPE
1361 && TYPE_NAME (TREE_TYPE (t
))
1362 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1363 == get_identifier ("FILE")
1364 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1366 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1368 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1369 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1370 types_match
= decls_match (newdecl
, olddecl
);
1372 return duplicate_decls (newdecl
, olddecl
,
1374 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1377 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1380 else if ((DECL_EXTERN_C_P (newdecl
)
1381 && DECL_EXTERN_C_P (olddecl
))
1382 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1383 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1385 /* A near match; override the builtin. */
1387 if (TREE_PUBLIC (newdecl
))
1389 warning (0, "new declaration %q#D", newdecl
);
1390 warning (0, "ambiguates built-in declaration %q#D",
1394 warning (OPT_Wshadow
,
1395 DECL_BUILT_IN (olddecl
)
1396 ? G_("shadowing built-in function %q#D")
1397 : G_("shadowing library function %q#D"), olddecl
);
1400 /* Discard the old built-in function. */
1403 /* Replace the old RTL to avoid problems with inlining. */
1404 COPY_DECL_RTL (newdecl
, olddecl
);
1406 /* Even if the types match, prefer the new declarations type for
1407 built-ins which have not been explicitly declared, for
1408 exception lists, etc... */
1409 else if (DECL_IS_BUILTIN (olddecl
))
1411 tree type
= TREE_TYPE (newdecl
);
1412 tree attribs
= (*targetm
.merge_type_attributes
)
1413 (TREE_TYPE (olddecl
), type
);
1415 type
= cp_build_type_attribute_variant (type
, attribs
);
1416 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1419 /* If a function is explicitly declared "throw ()", propagate that to
1420 the corresponding builtin. */
1421 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1422 && DECL_ANTICIPATED (olddecl
)
1423 && TREE_NOTHROW (newdecl
)
1424 && !TREE_NOTHROW (olddecl
))
1426 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1427 tree tmpdecl
= builtin_decl_explicit (fncode
);
1428 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1429 TREE_NOTHROW (tmpdecl
) = 1;
1432 /* Whether or not the builtin can throw exceptions has no
1433 bearing on this declarator. */
1434 TREE_NOTHROW (olddecl
) = 0;
1436 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1438 /* If a builtin function is redeclared as `static', merge
1439 the declarations, but make the original one static. */
1440 DECL_THIS_STATIC (olddecl
) = 1;
1441 TREE_PUBLIC (olddecl
) = 0;
1443 /* Make the old declaration consistent with the new one so
1444 that all remnants of the builtin-ness of this function
1445 will be banished. */
1446 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1447 COPY_DECL_RTL (newdecl
, olddecl
);
1450 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1452 /* C++ Standard, 3.3, clause 4:
1453 "[Note: a namespace name or a class template name must be unique
1454 in its declarative region (7.3.2, clause 14). ]" */
1455 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1456 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1457 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1458 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1459 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1460 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1462 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1463 && TREE_CODE (newdecl
) != TYPE_DECL
)
1464 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1465 && TREE_CODE (olddecl
) != TYPE_DECL
))
1467 /* We do nothing special here, because C++ does such nasty
1468 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1469 get shadowed, and know that if we need to find a TYPE_DECL
1470 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1471 slot of the identifier. */
1475 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1476 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1477 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1478 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1482 error ("%q#D redeclared as different kind of symbol", newdecl
);
1483 if (TREE_CODE (olddecl
) == TREE_LIST
)
1484 olddecl
= TREE_VALUE (olddecl
);
1485 error ("previous declaration of %q+#D", olddecl
);
1487 return error_mark_node
;
1489 else if (!types_match
)
1491 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1492 /* These are certainly not duplicate declarations; they're
1493 from different scopes. */
1496 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1498 /* The name of a class template may not be declared to refer to
1499 any other template, class, function, object, namespace, value,
1500 or type in the same scope. */
1501 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1502 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1504 error ("declaration of template %q#D", newdecl
);
1505 error ("conflicts with previous declaration %q+#D", olddecl
);
1506 return error_mark_node
;
1508 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1509 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1510 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1511 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1512 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1513 DECL_TEMPLATE_PARMS (olddecl
))
1514 /* Template functions can be disambiguated by
1516 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1517 TREE_TYPE (TREE_TYPE (olddecl
))))
1519 error ("new declaration %q#D", newdecl
);
1520 error ("ambiguates old declaration %q+#D", olddecl
);
1524 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1526 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1528 error ("declaration of C function %q#D conflicts with",
1530 error ("previous declaration %q+#D here", olddecl
);
1533 /* For function versions, params and types match, but they
1534 are not ambiguous. */
1535 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1536 && !DECL_FUNCTION_VERSIONED (olddecl
))
1537 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1538 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1540 error ("new declaration %q#D", newdecl
);
1541 if (FNDECL_USED_AUTO (olddecl
))
1542 error_at (DECL_SOURCE_LOCATION (olddecl
), "ambiguates old "
1543 "declaration with deduced return type");
1545 error ("ambiguates old declaration %q+#D", olddecl
);
1546 return error_mark_node
;
1553 error ("conflicting declaration %q#D", newdecl
);
1554 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1555 return error_mark_node
;
1558 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1559 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1560 && (!DECL_TEMPLATE_INFO (newdecl
)
1561 || (DECL_TI_TEMPLATE (newdecl
)
1562 != DECL_TI_TEMPLATE (olddecl
))))
1563 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1564 && (!DECL_TEMPLATE_INFO (olddecl
)
1565 || (DECL_TI_TEMPLATE (olddecl
)
1566 != DECL_TI_TEMPLATE (newdecl
))))))
1567 /* It's OK to have a template specialization and a non-template
1568 with the same type, or to have specializations of two
1569 different templates with the same type. Note that if one is a
1570 specialization, and the other is an instantiation of the same
1571 template, that we do not exit at this point. That situation
1572 can occur if we instantiate a template class, and then
1573 specialize one of its methods. This situation is valid, but
1574 the declarations must be merged in the usual way. */
1576 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1577 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1578 && !DECL_USE_TEMPLATE (newdecl
))
1579 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1580 && !DECL_USE_TEMPLATE (olddecl
))))
1581 /* One of the declarations is a template instantiation, and the
1582 other is not a template at all. That's OK. */
1584 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1586 /* In [namespace.alias] we have:
1588 In a declarative region, a namespace-alias-definition can be
1589 used to redefine a namespace-alias declared in that declarative
1590 region to refer only to the namespace to which it already
1593 Therefore, if we encounter a second alias directive for the same
1594 alias, we can just ignore the second directive. */
1595 if (DECL_NAMESPACE_ALIAS (newdecl
)
1596 && (DECL_NAMESPACE_ALIAS (newdecl
)
1597 == DECL_NAMESPACE_ALIAS (olddecl
)))
1599 /* [namespace.alias]
1601 A namespace-name or namespace-alias shall not be declared as
1602 the name of any other entity in the same declarative region.
1603 A namespace-name defined at global scope shall not be
1604 declared as the name of any other entity in any global scope
1606 error ("declaration of namespace %qD conflicts with", newdecl
);
1607 error ("previous declaration of namespace %q+D here", olddecl
);
1608 return error_mark_node
;
1612 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1615 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1616 if (DECL_NAME (olddecl
) != NULL_TREE
)
1617 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1618 ? G_("%q+#D previously defined here")
1619 : G_("%q+#D previously declared here"), olddecl
);
1620 return error_mark_node
;
1622 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1623 && DECL_INITIAL (olddecl
) != NULL_TREE
1624 && !prototype_p (TREE_TYPE (olddecl
))
1625 && prototype_p (TREE_TYPE (newdecl
)))
1627 /* Prototype decl follows defn w/o prototype. */
1628 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1629 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1630 "follows non-prototype definition here");
1632 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1633 || TREE_CODE (olddecl
) == VAR_DECL
)
1634 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1637 If two declarations of the same function or object
1638 specify different linkage-specifications ..., the program
1639 is ill-formed.... Except for functions with C++ linkage,
1640 a function declaration without a linkage specification
1641 shall not precede the first linkage specification for
1642 that function. A function can be declared without a
1643 linkage specification after an explicit linkage
1644 specification has been seen; the linkage explicitly
1645 specified in the earlier declaration is not affected by
1646 such a function declaration.
1648 DR 563 raises the question why the restrictions on
1649 functions should not also apply to objects. Older
1650 versions of G++ silently ignore the linkage-specification
1658 which is clearly wrong. Therefore, we now treat objects
1660 if (current_lang_depth () == 0)
1662 /* There is no explicit linkage-specification, so we use
1663 the linkage from the previous declaration. */
1664 if (!DECL_LANG_SPECIFIC (newdecl
))
1665 retrofit_lang_decl (newdecl
);
1666 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1670 error ("previous declaration of %q+#D with %qL linkage",
1671 olddecl
, DECL_LANGUAGE (olddecl
));
1672 error ("conflicts with new declaration with %qL linkage",
1673 DECL_LANGUAGE (newdecl
));
1677 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1679 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1681 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1682 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1685 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1686 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1688 for (; t1
&& t1
!= void_list_node
;
1689 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1690 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1692 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1695 permerror (input_location
, "default argument given for parameter %d of %q#D",
1697 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1701 error ("default argument given for parameter %d of %q#D",
1703 error ("after previous specification in %q+#D",
1710 /* Do not merge an implicit typedef with an explicit one. In:
1714 typedef class A A __attribute__ ((foo));
1716 the attribute should apply only to the typedef. */
1717 if (TREE_CODE (olddecl
) == TYPE_DECL
1718 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1719 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1722 /* If new decl is `static' and an `extern' was seen previously,
1724 warn_extern_redeclared_static (newdecl
, olddecl
);
1726 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1727 return error_mark_node
;
1729 /* We have committed to returning 1 at this point. */
1730 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1732 /* Now that functions must hold information normally held
1733 by field decls, there is extra work to do so that
1734 declaration information does not get destroyed during
1736 if (DECL_VINDEX (olddecl
))
1737 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1738 if (DECL_CONTEXT (olddecl
))
1739 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1740 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1741 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1742 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1743 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1744 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1745 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1746 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1747 SET_OVERLOADED_OPERATOR_CODE
1748 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1749 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1751 /* Optionally warn about more than one declaration for the same
1752 name, but don't warn about a function declaration followed by a
1754 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1755 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1756 /* Don't warn about extern decl followed by definition. */
1757 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1758 /* Don't warn about friends, let add_friend take care of it. */
1759 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1760 /* Don't warn about declaration followed by specialization. */
1761 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1762 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1764 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1765 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1768 if (DECL_DELETED_FN (newdecl
))
1770 error ("deleted definition of %qD", newdecl
);
1771 error ("after previous declaration %q+D", olddecl
);
1773 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1776 /* Deal with C++: must preserve virtual function table size. */
1777 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1779 tree newtype
= TREE_TYPE (newdecl
);
1780 tree oldtype
= TREE_TYPE (olddecl
);
1782 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1783 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1784 CLASSTYPE_FRIEND_CLASSES (newtype
)
1785 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1787 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1790 /* Copy all the DECL_... slots specified in the new decl
1791 except for any that we copy here from the old type. */
1792 DECL_ATTRIBUTES (newdecl
)
1793 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1795 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1799 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1800 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1801 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1802 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1803 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1804 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1806 DECL_ATTRIBUTES (old_result
)
1807 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1809 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1811 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1812 && DECL_INITIAL (new_result
))
1814 if (DECL_INITIAL (old_result
))
1815 DECL_UNINLINABLE (old_result
) = 1;
1817 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1818 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1819 DECL_NOT_REALLY_EXTERN (old_result
)
1820 = DECL_NOT_REALLY_EXTERN (new_result
);
1821 DECL_INTERFACE_KNOWN (old_result
)
1822 = DECL_INTERFACE_KNOWN (new_result
);
1823 DECL_DECLARED_INLINE_P (old_result
)
1824 = DECL_DECLARED_INLINE_P (new_result
);
1825 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1826 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1831 DECL_DECLARED_INLINE_P (old_result
)
1832 |= DECL_DECLARED_INLINE_P (new_result
);
1833 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1834 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1835 check_redeclaration_exception_specification (newdecl
, olddecl
);
1839 /* If the new declaration is a definition, update the file and
1840 line information on the declaration, and also make
1841 the old declaration the same definition. */
1842 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1844 DECL_SOURCE_LOCATION (olddecl
)
1845 = DECL_SOURCE_LOCATION (old_result
)
1846 = DECL_SOURCE_LOCATION (newdecl
);
1847 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1848 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1851 DECL_ARGUMENTS (old_result
)
1852 = DECL_ARGUMENTS (new_result
);
1853 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1854 parm
= DECL_CHAIN (parm
))
1855 DECL_CONTEXT (parm
) = old_result
;
1864 /* Automatically handles default parameters. */
1865 tree oldtype
= TREE_TYPE (olddecl
);
1868 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1869 maybe_instantiate_noexcept (olddecl
);
1871 /* Merge the data types specified in the two decls. */
1872 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1874 /* If merge_types produces a non-typedef type, just use the old type. */
1875 if (TREE_CODE (newdecl
) == TYPE_DECL
1876 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1879 if (TREE_CODE (newdecl
) == VAR_DECL
)
1881 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1882 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1883 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1884 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1885 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1886 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1888 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1889 if (DECL_LANG_SPECIFIC (olddecl
)
1890 && CP_DECL_THREADPRIVATE_P (olddecl
))
1892 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1893 if (!DECL_LANG_SPECIFIC (newdecl
))
1894 retrofit_lang_decl (newdecl
);
1896 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1897 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1901 /* Do this after calling `merge_types' so that default
1902 parameters don't confuse us. */
1903 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1904 check_redeclaration_exception_specification (newdecl
, olddecl
);
1905 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1907 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1908 check_default_args (newdecl
);
1910 /* Lay the type out, unless already done. */
1911 if (! same_type_p (newtype
, oldtype
)
1912 && TREE_TYPE (newdecl
) != error_mark_node
1913 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1914 layout_type (TREE_TYPE (newdecl
));
1916 if ((TREE_CODE (newdecl
) == VAR_DECL
1917 || TREE_CODE (newdecl
) == PARM_DECL
1918 || TREE_CODE (newdecl
) == RESULT_DECL
1919 || TREE_CODE (newdecl
) == FIELD_DECL
1920 || TREE_CODE (newdecl
) == TYPE_DECL
)
1921 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1922 layout_decl (newdecl
, 0);
1924 /* Merge the type qualifiers. */
1925 if (TREE_READONLY (newdecl
))
1926 TREE_READONLY (olddecl
) = 1;
1927 if (TREE_THIS_VOLATILE (newdecl
))
1928 TREE_THIS_VOLATILE (olddecl
) = 1;
1929 if (TREE_NOTHROW (newdecl
))
1930 TREE_NOTHROW (olddecl
) = 1;
1932 /* Merge deprecatedness. */
1933 if (TREE_DEPRECATED (newdecl
))
1934 TREE_DEPRECATED (olddecl
) = 1;
1936 /* Preserve function specific target and optimization options */
1937 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1939 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1940 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1941 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1942 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1944 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1945 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1946 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1947 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1950 /* Merge the initialization information. */
1951 if (DECL_INITIAL (newdecl
) == NULL_TREE
1952 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1954 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1955 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1956 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1958 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1959 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1963 /* Merge the section attribute.
1964 We want to issue an error if the sections conflict but that must be
1965 done later in decl_attributes since we are called before attributes
1967 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1968 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1970 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1972 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1973 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1974 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1975 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1976 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1977 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1978 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1979 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1980 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1981 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1982 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1983 /* Keep the old RTL. */
1984 COPY_DECL_RTL (olddecl
, newdecl
);
1986 else if (TREE_CODE (newdecl
) == VAR_DECL
1987 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1989 /* Keep the old RTL. We cannot keep the old RTL if the old
1990 declaration was for an incomplete object and the new
1991 declaration is not since many attributes of the RTL will
1993 COPY_DECL_RTL (olddecl
, newdecl
);
1996 /* If cannot merge, then use the new type and qualifiers,
1997 and don't preserve the old rtl. */
2000 /* Clean out any memory we had of the old declaration. */
2001 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2003 TREE_VALUE (oldstatic
) = error_mark_node
;
2005 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2006 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2007 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2008 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2011 /* Merge the storage class information. */
2012 merge_weak (newdecl
, olddecl
);
2014 if (DECL_ONE_ONLY (olddecl
))
2015 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2017 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2018 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2019 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2020 if (! DECL_EXTERNAL (olddecl
))
2021 DECL_EXTERNAL (newdecl
) = 0;
2023 new_template_info
= NULL_TREE
;
2024 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2026 bool new_redefines_gnu_inline
= false;
2028 if (new_defines_function
2029 && ((DECL_INTERFACE_KNOWN (olddecl
)
2030 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2031 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2032 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2033 == FUNCTION_DECL
))))
2037 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2038 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2040 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2043 if (!new_redefines_gnu_inline
)
2045 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2046 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2047 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2049 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2050 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2051 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2053 /* If the OLDDECL is an instantiation and/or specialization,
2054 then the NEWDECL must be too. But, it may not yet be marked
2055 as such if the caller has created NEWDECL, but has not yet
2056 figured out that it is a redeclaration. */
2057 if (!DECL_USE_TEMPLATE (newdecl
))
2058 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2060 /* Don't really know how much of the language-specific
2061 values we should copy from old to new. */
2062 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2063 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2064 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2065 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2067 if (LANG_DECL_HAS_MIN (newdecl
))
2069 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2070 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2071 if (DECL_TEMPLATE_INFO (newdecl
))
2072 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2073 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2075 /* Only functions have these fields. */
2076 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2077 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
2079 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2080 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2081 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2082 && DECL_HIDDEN_FRIEND_P (olddecl
)
2083 && newdecl_is_friend
);
2084 DECL_BEFRIENDING_CLASSES (newdecl
)
2085 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2086 DECL_BEFRIENDING_CLASSES (olddecl
));
2087 /* DECL_THUNKS is only valid for virtual functions,
2088 otherwise it is a DECL_FRIEND_CONTEXT. */
2089 if (DECL_VIRTUAL_P (newdecl
))
2090 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2092 /* Only variables have this field. */
2093 else if (TREE_CODE (newdecl
) == VAR_DECL
2094 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2095 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2098 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2102 /* Merge parameter attributes. */
2103 tree oldarg
, newarg
;
2104 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2105 newarg
= DECL_ARGUMENTS(newdecl
);
2107 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2108 DECL_ATTRIBUTES (newarg
)
2109 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2110 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2113 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2114 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2116 /* If newdecl is not a specialization, then it is not a
2117 template-related function at all. And that means that we
2118 should have exited above, returning 0. */
2119 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2121 if (DECL_ODR_USED (olddecl
))
2122 /* From [temp.expl.spec]:
2124 If a template, a member template or the member of a class
2125 template is explicitly specialized then that
2126 specialization shall be declared before the first use of
2127 that specialization that would cause an implicit
2128 instantiation to take place, in every translation unit in
2129 which such a use occurs. */
2130 error ("explicit specialization of %qD after first use",
2133 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2135 /* Don't propagate visibility from the template to the
2136 specialization here. We'll do that in determine_visibility if
2138 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2140 /* [temp.expl.spec/14] We don't inline explicit specialization
2141 just because the primary template says so. */
2143 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2144 the always_inline attribute. */
2145 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2146 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2148 if (DECL_DECLARED_INLINE_P (newdecl
))
2149 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2151 DECL_ATTRIBUTES (newdecl
)
2152 = remove_attribute ("always_inline",
2153 DECL_ATTRIBUTES (newdecl
));
2156 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2158 /* Never inline re-defined extern inline functions.
2159 FIXME: this could be better handled by keeping both
2160 function as separate declarations. */
2161 DECL_UNINLINABLE (newdecl
) = 1;
2165 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2166 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2168 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2170 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2171 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2173 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2174 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2175 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2176 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2179 /* Preserve abstractness on cloned [cd]tors. */
2180 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2182 /* Update newdecl's parms to point at olddecl. */
2183 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2184 parm
= DECL_CHAIN (parm
))
2185 DECL_CONTEXT (parm
) = olddecl
;
2189 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2190 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2191 COPY_DECL_RTL (newdecl
, olddecl
);
2193 if (! types_match
|| new_defines_function
)
2195 /* These need to be copied so that the names are available.
2196 Note that if the types do match, we'll preserve inline
2197 info and other bits, but if not, we won't. */
2198 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2199 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2201 /* If redeclaring a builtin function, it stays built in
2202 if newdecl is a gnu_inline definition, or if newdecl is just
2204 if (DECL_BUILT_IN (olddecl
)
2205 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2207 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2208 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2209 /* If we're keeping the built-in definition, keep the rtl,
2210 regardless of declaration matches. */
2211 COPY_DECL_RTL (olddecl
, newdecl
);
2212 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2214 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2217 /* If a compatible prototype of these builtin functions
2218 is seen, assume the runtime implements it with the
2219 expected semantics. */
2220 case BUILT_IN_STPCPY
:
2221 if (builtin_decl_explicit_p (fncode
))
2222 set_builtin_decl_implicit_p (fncode
, true);
2229 if (new_defines_function
)
2230 /* If defining a function declared with other language
2231 linkage, use the previously declared language linkage. */
2232 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2233 else if (types_match
)
2235 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2236 /* Don't clear out the arguments if we're just redeclaring a
2238 if (DECL_ARGUMENTS (olddecl
))
2239 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2242 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2243 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2245 /* Now preserve various other info from the definition. */
2246 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2247 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2248 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2249 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2251 /* Warn about conflicting visibility specifications. */
2252 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2253 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2254 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2256 warning_at (input_location
, OPT_Wattributes
,
2257 "%q+D: visibility attribute ignored because it", newdecl
);
2258 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2259 "conflicts with previous declaration here");
2261 /* Choose the declaration which specified visibility. */
2262 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2264 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2265 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2267 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2268 so keep this behavior. */
2269 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2271 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2272 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2274 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2275 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2277 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2278 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2280 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2281 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2282 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2284 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2285 with that from NEWDECL below. */
2286 if (DECL_LANG_SPECIFIC (olddecl
))
2288 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2289 != DECL_LANG_SPECIFIC (newdecl
));
2290 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2293 /* Merge the USED information. */
2294 if (TREE_USED (olddecl
))
2295 TREE_USED (newdecl
) = 1;
2296 else if (TREE_USED (newdecl
))
2297 TREE_USED (olddecl
) = 1;
2298 if (TREE_CODE (newdecl
) == VAR_DECL
)
2300 if (DECL_READ_P (olddecl
))
2301 DECL_READ_P (newdecl
) = 1;
2302 else if (DECL_READ_P (newdecl
))
2303 DECL_READ_P (olddecl
) = 1;
2305 if (DECL_PRESERVE_P (olddecl
))
2306 DECL_PRESERVE_P (newdecl
) = 1;
2307 else if (DECL_PRESERVE_P (newdecl
))
2308 DECL_PRESERVE_P (olddecl
) = 1;
2310 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2311 to olddecl and deleted. */
2312 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2313 && DECL_FUNCTION_VERSIONED (olddecl
))
2315 /* Set the flag for newdecl so that it gets copied to olddecl. */
2316 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2317 /* newdecl will be purged after copying to olddecl and is no longer
2319 delete_function_version (newdecl
);
2322 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2326 function_size
= sizeof (struct tree_decl_common
);
2328 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2329 (char *) newdecl
+ sizeof (struct tree_common
),
2330 function_size
- sizeof (struct tree_common
));
2332 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2333 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2334 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2335 if (new_template_info
)
2336 /* If newdecl is a template instantiation, it is possible that
2337 the following sequence of events has occurred:
2339 o A friend function was declared in a class template. The
2340 class template was instantiated.
2342 o The instantiation of the friend declaration was
2343 recorded on the instantiation list, and is newdecl.
2345 o Later, however, instantiate_class_template called pushdecl
2346 on the newdecl to perform name injection. But, pushdecl in
2347 turn called duplicate_decls when it discovered that another
2348 declaration of a global function with the same name already
2351 o Here, in duplicate_decls, we decided to clobber newdecl.
2353 If we're going to do that, we'd better make sure that
2354 olddecl, and not newdecl, is on the list of
2355 instantiations so that if we try to do the instantiation
2356 again we won't get the clobbered declaration. */
2357 reregister_specialization (newdecl
,
2363 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2364 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2365 (char *) newdecl
+ sizeof (struct tree_common
),
2366 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2367 switch (TREE_CODE (olddecl
))
2377 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2378 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2379 size
- sizeof (struct tree_decl_common
)
2380 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2384 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2385 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2386 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2387 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2391 DECL_UID (olddecl
) = olddecl_uid
;
2393 DECL_FRIEND_P (olddecl
) = 1;
2396 DECL_ANTICIPATED (olddecl
) = 1;
2397 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2400 /* NEWDECL contains the merged attribute lists.
2401 Update OLDDECL to be the same. */
2402 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2404 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2405 so that encode_section_info has a chance to look at the new decl
2406 flags and attributes. */
2407 if (DECL_RTL_SET_P (olddecl
)
2408 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2409 || (TREE_CODE (olddecl
) == VAR_DECL
2410 && TREE_STATIC (olddecl
))))
2411 make_decl_rtl (olddecl
);
2413 /* The NEWDECL will no longer be needed. Because every out-of-class
2414 declaration of a member results in a call to duplicate_decls,
2415 freeing these nodes represents in a significant savings. */
2421 /* Return zero if the declaration NEWDECL is valid
2422 when the declaration OLDDECL (assumed to be for the same name)
2423 has already been seen.
2424 Otherwise return an error message format string with a %s
2425 where the identifier should go. */
2428 redeclaration_error_message (tree newdecl
, tree olddecl
)
2430 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2432 /* Because C++ can put things into name space for free,
2433 constructs like "typedef struct foo { ... } foo"
2434 would look like an erroneous redeclaration. */
2435 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2438 return G_("redefinition of %q#D");
2440 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2442 /* If this is a pure function, its olddecl will actually be
2443 the original initialization to `0' (which we force to call
2444 abort()). Don't complain about redefinition in this case. */
2445 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2446 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2449 /* If both functions come from different namespaces, this is not
2450 a redeclaration - this is a conflict with a used function. */
2451 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2452 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2453 && ! decls_match (olddecl
, newdecl
))
2454 return G_("%qD conflicts with used function");
2456 /* We'll complain about linkage mismatches in
2457 warn_extern_redeclared_static. */
2459 /* Defining the same name twice is no good. */
2460 if (DECL_INITIAL (olddecl
) != NULL_TREE
2461 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2463 if (DECL_NAME (olddecl
) == NULL_TREE
)
2464 return G_("%q#D not declared in class");
2465 else if (!GNU_INLINE_P (olddecl
)
2466 || GNU_INLINE_P (newdecl
))
2467 return G_("redefinition of %q#D");
2470 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2472 bool olda
= GNU_INLINE_P (olddecl
);
2473 bool newa
= GNU_INLINE_P (newdecl
);
2478 return G_("%q+D redeclared inline with "
2479 "%<gnu_inline%> attribute");
2481 return G_("%q+D redeclared inline without "
2482 "%<gnu_inline%> attribute");
2486 check_abi_tag_redeclaration
2487 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2488 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2492 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2496 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2498 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2499 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2500 return G_("redefinition of %q#D");
2504 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2505 || (DECL_TEMPLATE_RESULT (newdecl
)
2506 == DECL_TEMPLATE_RESULT (olddecl
)))
2509 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2510 if (DECL_TEMPLATE_INFO (nt
))
2511 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2512 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2513 if (DECL_TEMPLATE_INFO (ot
))
2514 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2515 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2516 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2517 return G_("redefinition of %q#D");
2519 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2521 bool olda
= GNU_INLINE_P (ot
);
2522 bool newa
= GNU_INLINE_P (nt
);
2527 return G_("%q+D redeclared inline with "
2528 "%<gnu_inline%> attribute");
2530 return G_("%q+D redeclared inline without "
2531 "%<gnu_inline%> attribute");
2535 /* Core issue #226 (C++0x):
2537 If a friend function template declaration specifies a
2538 default template-argument, that declaration shall be a
2539 definition and shall be the only declaration of the
2540 function template in the translation unit. */
2541 if ((cxx_dialect
!= cxx98
)
2542 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2543 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2544 /*is_primary=*/true,
2545 /*is_partial=*/false,
2546 /*is_friend_decl=*/2))
2547 return G_("redeclaration of friend %q#D "
2548 "may not have default template arguments");
2552 else if (TREE_CODE (newdecl
) == VAR_DECL
2553 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2554 && (! DECL_LANG_SPECIFIC (olddecl
)
2555 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2556 || DECL_THREAD_LOCAL_P (newdecl
)))
2558 /* Only variables can be thread-local, and all declarations must
2559 agree on this property. */
2560 if (DECL_THREAD_LOCAL_P (newdecl
))
2561 return G_("thread-local declaration of %q#D follows "
2562 "non-thread-local declaration");
2564 return G_("non-thread-local declaration of %q#D follows "
2565 "thread-local declaration");
2567 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2569 /* The objects have been declared at namespace scope. If either
2570 is a member of an anonymous union, then this is an invalid
2571 redeclaration. For example:
2577 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2578 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2579 return G_("redeclaration of %q#D");
2580 /* If at least one declaration is a reference, there is no
2581 conflict. For example:
2587 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2589 /* Reject two definitions. */
2590 return G_("redefinition of %q#D");
2594 /* Objects declared with block scope: */
2595 /* Reject two definitions, and reject a definition
2596 together with an external reference. */
2597 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2598 return G_("redeclaration of %q#D");
2603 /* Hash and equality functions for the named_label table. */
2606 named_label_entry_hash (const void *data
)
2608 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2609 return DECL_UID (ent
->label_decl
);
2613 named_label_entry_eq (const void *a
, const void *b
)
2615 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2616 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2617 return ent_a
->label_decl
== ent_b
->label_decl
;
2620 /* Create a new label, named ID. */
2623 make_label_decl (tree id
, int local_p
)
2625 struct named_label_entry
*ent
;
2629 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2631 DECL_CONTEXT (decl
) = current_function_decl
;
2632 DECL_MODE (decl
) = VOIDmode
;
2633 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2635 /* Say where one reference is to the label, for the sake of the
2636 error if it is not defined. */
2637 DECL_SOURCE_LOCATION (decl
) = input_location
;
2639 /* Record the fact that this identifier is bound to this label. */
2640 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2642 /* Create the label htab for the function on demand. */
2644 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2645 named_label_entry_eq
, NULL
);
2647 /* Record this label on the list of labels used in this function.
2648 We do this before calling make_label_decl so that we get the
2649 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2650 ent
= ggc_alloc_cleared_named_label_entry ();
2651 ent
->label_decl
= decl
;
2653 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2654 gcc_assert (*slot
== NULL
);
2660 /* Look for a label named ID in the current function. If one cannot
2661 be found, create one. (We keep track of used, but undefined,
2662 labels, and complain about them at the end of a function.) */
2665 lookup_label_1 (tree id
)
2669 /* You can't use labels at global scope. */
2670 if (current_function_decl
== NULL_TREE
)
2672 error ("label %qE referenced outside of any function", id
);
2676 /* See if we've already got this label. */
2677 decl
= IDENTIFIER_LABEL_VALUE (id
);
2678 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2681 decl
= make_label_decl (id
, /*local_p=*/0);
2685 /* Wrapper for lookup_label_1. */
2688 lookup_label (tree id
)
2691 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2692 ret
= lookup_label_1 (id
);
2693 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2697 /* Declare a local label named ID. */
2700 declare_local_label (tree id
)
2703 cp_label_binding bind
;
2705 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2706 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2707 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2709 decl
= make_label_decl (id
, /*local_p=*/1);
2711 VEC_safe_push (cp_label_binding
, gc
, current_binding_level
->shadowed_labels
,
2717 /* Returns nonzero if it is ill-formed to jump past the declaration of
2718 DECL. Returns 2 if it's also a real problem. */
2721 decl_jump_unsafe (tree decl
)
2723 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2724 with automatic storage duration is not in scope to a point where it is
2725 in scope is ill-formed unless the variable has scalar type, class type
2726 with a trivial default constructor and a trivial destructor, a
2727 cv-qualified version of one of these types, or an array of one of the
2728 preceding types and is declared without an initializer (8.5). */
2729 tree type
= TREE_TYPE (decl
);
2731 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2732 || type
== error_mark_node
)
2735 type
= strip_array_types (type
);
2737 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2740 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2746 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2749 identify_goto (tree decl
, const location_t
*locus
)
2752 permerror (input_location
, "jump to label %qD", decl
);
2754 permerror (input_location
, "jump to case label");
2756 permerror (*locus
, " from here");
2759 /* Check that a single previously seen jump to a newly defined label
2760 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2761 the jump context; NAMES are the names in scope in LEVEL at the jump
2762 context; LOCUS is the source position of the jump or 0. Returns
2763 true if all is well. */
2766 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2767 bool exited_omp
, const location_t
*locus
)
2769 cp_binding_level
*b
;
2770 bool identified
= false, saw_eh
= false, saw_omp
= false;
2774 identify_goto (decl
, locus
);
2775 error (" exits OpenMP structured block");
2776 identified
= saw_omp
= true;
2779 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2781 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2783 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2784 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2785 : TREE_CHAIN (new_decls
)))
2787 int problem
= decl_jump_unsafe (new_decls
);
2793 identify_goto (decl
, locus
);
2797 error (" crosses initialization of %q+#D", new_decls
);
2799 permerror (input_location
, " enters scope of %q+#D which has "
2800 "non-trivial destructor", new_decls
);
2805 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2809 identify_goto (decl
, locus
);
2812 if (b
->kind
== sk_try
)
2813 error (" enters try block");
2815 error (" enters catch block");
2818 if (b
->kind
== sk_omp
&& !saw_omp
)
2822 identify_goto (decl
, locus
);
2825 error (" enters OpenMP structured block");
2834 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2836 check_previous_goto_1 (decl
, use
->binding_level
,
2837 use
->names_in_scope
, use
->in_omp_scope
,
2838 &use
->o_goto_locus
);
2842 check_switch_goto (cp_binding_level
* level
)
2844 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2847 /* Check that a new jump to a label DECL is OK. Called by
2848 finish_goto_stmt. */
2851 check_goto (tree decl
)
2853 struct named_label_entry
*ent
, dummy
;
2854 bool saw_catch
= false, identified
= false;
2858 /* We can't know where a computed goto is jumping.
2859 So we assume that it's OK. */
2860 if (TREE_CODE (decl
) != LABEL_DECL
)
2863 /* We didn't record any information about this label when we created it,
2864 and there's not much point since it's trivial to analyze as a return. */
2865 if (decl
== cdtor_label
)
2868 dummy
.label_decl
= decl
;
2869 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2870 gcc_assert (ent
!= NULL
);
2872 /* If the label hasn't been defined yet, defer checking. */
2873 if (! DECL_INITIAL (decl
))
2875 struct named_label_use_entry
*new_use
;
2877 /* Don't bother creating another use if the last goto had the
2878 same data, and will therefore create the same set of errors. */
2880 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2883 new_use
= ggc_alloc_named_label_use_entry ();
2884 new_use
->binding_level
= current_binding_level
;
2885 new_use
->names_in_scope
= current_binding_level
->names
;
2886 new_use
->o_goto_locus
= input_location
;
2887 new_use
->in_omp_scope
= false;
2889 new_use
->next
= ent
->uses
;
2890 ent
->uses
= new_use
;
2894 if (ent
->in_try_scope
|| ent
->in_catch_scope
2895 || ent
->in_omp_scope
|| !VEC_empty (tree
, ent
->bad_decls
))
2897 permerror (input_location
, "jump to label %q+D", decl
);
2898 permerror (input_location
, " from here");
2902 FOR_EACH_VEC_ELT (tree
, ent
->bad_decls
, ix
, bad
)
2904 int u
= decl_jump_unsafe (bad
);
2906 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2908 /* Can't skip init of __exception_info. */
2909 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2913 error (" skips initialization of %q+#D", bad
);
2915 permerror (input_location
, " enters scope of %q+#D which has "
2916 "non-trivial destructor", bad
);
2919 if (ent
->in_try_scope
)
2920 error (" enters try block");
2921 else if (ent
->in_catch_scope
&& !saw_catch
)
2922 error (" enters catch block");
2924 if (ent
->in_omp_scope
)
2925 error (" enters OpenMP structured block");
2926 else if (flag_openmp
)
2928 cp_binding_level
*b
;
2929 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2931 if (b
== ent
->binding_level
)
2933 if (b
->kind
== sk_omp
)
2937 permerror (input_location
, "jump to label %q+D", decl
);
2938 permerror (input_location
, " from here");
2941 error (" exits OpenMP structured block");
2948 /* Check that a return is ok wrt OpenMP structured blocks.
2949 Called by finish_return_stmt. Returns true if all is well. */
2952 check_omp_return (void)
2954 cp_binding_level
*b
;
2955 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2956 if (b
->kind
== sk_omp
)
2958 error ("invalid exit from OpenMP structured block");
2961 else if (b
->kind
== sk_function_parms
)
2966 /* Define a label, specifying the location in the source file.
2967 Return the LABEL_DECL node for the label. */
2970 define_label_1 (location_t location
, tree name
)
2972 struct named_label_entry
*ent
, dummy
;
2973 cp_binding_level
*p
;
2976 decl
= lookup_label (name
);
2978 dummy
.label_decl
= decl
;
2979 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2980 gcc_assert (ent
!= NULL
);
2982 /* After labels, make any new cleanups in the function go into their
2983 own new (temporary) binding contour. */
2984 for (p
= current_binding_level
;
2985 p
->kind
!= sk_function_parms
;
2987 p
->more_cleanups_ok
= 0;
2989 if (name
== get_identifier ("wchar_t"))
2990 permerror (input_location
, "label named wchar_t");
2992 if (DECL_INITIAL (decl
) != NULL_TREE
)
2994 error ("duplicate label %qD", decl
);
2995 return error_mark_node
;
2999 struct named_label_use_entry
*use
;
3001 /* Mark label as having been defined. */
3002 DECL_INITIAL (decl
) = error_mark_node
;
3003 /* Say where in the source. */
3004 DECL_SOURCE_LOCATION (decl
) = location
;
3006 ent
->binding_level
= current_binding_level
;
3007 ent
->names_in_scope
= current_binding_level
->names
;
3009 for (use
= ent
->uses
; use
; use
= use
->next
)
3010 check_previous_goto (decl
, use
);
3017 /* Wrapper for define_label_1. */
3020 define_label (location_t location
, tree name
)
3023 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3024 ret
= define_label_1 (location
, name
);
3025 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3032 cp_binding_level
*level
;
3033 struct cp_switch
*next
;
3034 /* The SWITCH_STMT being built. */
3036 /* A splay-tree mapping the low element of a case range to the high
3037 element, or NULL_TREE if there is no high element. Used to
3038 determine whether or not a new case label duplicates an old case
3039 label. We need a tree, rather than simply a hash table, because
3040 of the GNU case range extension. */
3044 /* A stack of the currently active switch statements. The innermost
3045 switch statement is on the top of the stack. There is no need to
3046 mark the stack for garbage collection because it is only active
3047 during the processing of the body of a function, and we never
3048 collect at that point. */
3050 static struct cp_switch
*switch_stack
;
3052 /* Called right after a switch-statement condition is parsed.
3053 SWITCH_STMT is the switch statement being parsed. */
3056 push_switch (tree switch_stmt
)
3058 struct cp_switch
*p
= XNEW (struct cp_switch
);
3059 p
->level
= current_binding_level
;
3060 p
->next
= switch_stack
;
3061 p
->switch_stmt
= switch_stmt
;
3062 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3069 struct cp_switch
*cs
= switch_stack
;
3070 location_t switch_location
;
3072 /* Emit warnings as needed. */
3073 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3074 if (!processing_template_decl
)
3075 c_do_switch_warnings (cs
->cases
, switch_location
,
3076 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3077 SWITCH_STMT_COND (cs
->switch_stmt
));
3079 splay_tree_delete (cs
->cases
);
3080 switch_stack
= switch_stack
->next
;
3084 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3085 condition. Note that if TYPE and VALUE are already integral we don't
3086 really do the conversion because the language-independent
3087 warning/optimization code will work better that way. */
3090 case_conversion (tree type
, tree value
)
3092 if (value
== NULL_TREE
)
3095 if (cxx_dialect
>= cxx0x
3096 && (SCOPED_ENUM_P (type
)
3097 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3099 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3100 type
= type_promotes_to (type
);
3101 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3103 return cxx_constant_value (value
);
3106 /* Note that we've seen a definition of a case label, and complain if this
3107 is a bad place for one. */
3110 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3113 cp_binding_level
*p
;
3116 if (processing_template_decl
)
3120 /* For templates, just add the case label; we'll do semantic
3121 analysis at instantiation-time. */
3122 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3123 return add_stmt (build_case_label (low_value
, high_value
, label
));
3126 /* Find the condition on which this switch statement depends. */
3127 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3128 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3129 cond
= TREE_VALUE (cond
);
3131 if (!check_switch_goto (switch_stack
->level
))
3132 return error_mark_node
;
3134 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3136 low_value
= case_conversion (type
, low_value
);
3137 high_value
= case_conversion (type
, high_value
);
3139 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3140 low_value
, high_value
);
3142 /* After labels, make any new cleanups in the function go into their
3143 own new (temporary) binding contour. */
3144 for (p
= current_binding_level
;
3145 p
->kind
!= sk_function_parms
;
3147 p
->more_cleanups_ok
= 0;
3152 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3155 typename_hash (const void* k
)
3158 const_tree
const t
= (const_tree
) k
;
3160 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3161 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3166 typedef struct typename_info
{
3174 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3175 really of type `typename_info*' */
3178 typename_compare (const void * k1
, const void * k2
)
3180 const_tree
const t1
= (const_tree
) k1
;
3181 const typename_info
*const t2
= (const typename_info
*) k2
;
3183 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3184 && TYPE_CONTEXT (t1
) == t2
->scope
3185 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3186 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3187 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3190 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3191 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3193 Returns the new TYPENAME_TYPE. */
3195 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3198 build_typename_type (tree context
, tree name
, tree fullname
,
3199 enum tag_types tag_type
)
3207 if (typename_htab
== NULL
)
3208 typename_htab
= htab_create_ggc (61, &typename_hash
,
3209 &typename_compare
, NULL
);
3211 ti
.scope
= FROB_CONTEXT (context
);
3213 ti
.template_id
= fullname
;
3214 ti
.enum_p
= tag_type
== enum_type
;
3215 ti
.class_p
= (tag_type
== class_type
3216 || tag_type
== record_type
3217 || tag_type
== union_type
);
3218 hash
= (htab_hash_pointer (ti
.scope
)
3219 ^ htab_hash_pointer (ti
.name
));
3221 /* See if we already have this type. */
3222 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3227 /* Build the TYPENAME_TYPE. */
3228 t
= cxx_make_type (TYPENAME_TYPE
);
3229 TYPE_CONTEXT (t
) = ti
.scope
;
3230 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3231 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3232 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3234 /* Build the corresponding TYPE_DECL. */
3235 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3236 TYPE_NAME (TREE_TYPE (d
)) = d
;
3237 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3238 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3239 DECL_ARTIFICIAL (d
) = 1;
3241 /* Store it in the hash table. */
3244 /* TYPENAME_TYPEs must always be compared structurally, because
3245 they may or may not resolve down to another type depending on
3246 the currently open classes. */
3247 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3253 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3254 provided to name the type. Returns an appropriate type, unless an
3255 error occurs, in which case error_mark_node is returned. If we
3256 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3257 return that, rather than the _TYPE it corresponds to, in other
3258 cases we look through the type decl. If TF_ERROR is set, complain
3259 about errors, otherwise be quiet. */
3262 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3263 tsubst_flags_t complain
)
3269 if (name
== error_mark_node
3270 || context
== NULL_TREE
3271 || context
== error_mark_node
)
3272 return error_mark_node
;
3276 if (!(TYPE_LANG_SPECIFIC (name
)
3277 && (CLASSTYPE_IS_TEMPLATE (name
)
3278 || CLASSTYPE_USE_TEMPLATE (name
))))
3279 name
= TYPE_IDENTIFIER (name
);
3281 /* Create a TEMPLATE_ID_EXPR for the type. */
3282 name
= build_nt (TEMPLATE_ID_EXPR
,
3283 CLASSTYPE_TI_TEMPLATE (name
),
3284 CLASSTYPE_TI_ARGS (name
));
3286 else if (TREE_CODE (name
) == TYPE_DECL
)
3287 name
= DECL_NAME (name
);
3291 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3293 name
= TREE_OPERAND (name
, 0);
3294 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3295 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3296 else if (TREE_CODE (name
) == OVERLOAD
)
3298 if (complain
& tf_error
)
3299 error ("%qD is not a type", name
);
3300 return error_mark_node
;
3303 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3305 if (complain
& tf_error
)
3306 error ("%qD used without template parameters", name
);
3307 return error_mark_node
;
3309 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3310 gcc_assert (TYPE_P (context
));
3312 if (!MAYBE_CLASS_TYPE_P (context
))
3314 if (complain
& tf_error
)
3315 error ("%q#T is not a class", context
);
3316 return error_mark_node
;
3319 /* When the CONTEXT is a dependent type, NAME could refer to a
3320 dependent base class of CONTEXT. But look inside it anyway
3321 if CONTEXT is a currently open scope, in case it refers to a
3322 member of the current instantiation or a non-dependent base;
3323 lookup will stop when we hit a dependent base. */
3324 if (!dependent_scope_p (context
))
3325 /* We should only set WANT_TYPE when we're a nested typename type.
3326 Then we can give better diagnostics if we find a non-type. */
3327 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3331 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3332 return build_typename_type (context
, name
, fullname
, tag_type
);
3334 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3338 if (complain
& tf_error
)
3339 error (want_template
? G_("no class template named %q#T in %q#T")
3340 : G_("no type named %q#T in %q#T"), name
, context
);
3341 return error_mark_node
;
3344 /* Pull out the template from an injected-class-name (or multiple). */
3346 t
= maybe_get_template_decl_from_type_decl (t
);
3348 if (TREE_CODE (t
) == TREE_LIST
)
3350 if (complain
& tf_error
)
3352 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3353 print_candidates (t
);
3355 return error_mark_node
;
3358 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3360 if (complain
& tf_error
)
3361 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3363 return error_mark_node
;
3365 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3367 if (complain
& tf_error
)
3368 error ("%<typename %T::%D%> names %q#T, which is not a type",
3370 return error_mark_node
;
3373 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3374 return error_mark_node
;
3376 /* If we are currently parsing a template and if T is a typedef accessed
3377 through CONTEXT then we need to remember and check access of T at
3378 template instantiation time. */
3379 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3382 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3384 /*entering_scope=*/0,
3385 tf_warning_or_error
| tf_user
);
3387 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3390 maybe_record_typedef_use (t
);
3395 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3396 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3397 in which case error_mark_node is returned.
3399 If PARM_LIST is non-NULL, also make sure that the template parameter
3400 list of TEMPLATE_DECL matches.
3402 If COMPLAIN zero, don't complain about any errors that occur. */
3405 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3406 tsubst_flags_t complain
)
3412 name
= TYPE_IDENTIFIER (name
);
3413 else if (DECL_P (name
))
3414 name
= DECL_NAME (name
);
3415 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3417 if (!dependent_type_p (context
)
3418 || currently_open_class (context
))
3420 tree tmpl
= NULL_TREE
;
3422 if (MAYBE_CLASS_TYPE_P (context
))
3423 tmpl
= lookup_field (context
, name
, 0, false);
3425 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3426 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3428 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3430 if (complain
& tf_error
)
3431 error ("no class template named %q#T in %q#T", name
, context
);
3432 return error_mark_node
;
3436 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3438 if (complain
& tf_error
)
3440 error ("template parameters do not match template");
3441 error ("%q+D declared here", tmpl
);
3443 return error_mark_node
;
3446 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3448 return error_mark_node
;
3453 /* Build the UNBOUND_CLASS_TEMPLATE. */
3454 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3455 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3456 TREE_TYPE (t
) = NULL_TREE
;
3457 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3459 /* Build the corresponding TEMPLATE_DECL. */
3460 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3461 TYPE_NAME (TREE_TYPE (d
)) = d
;
3462 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3463 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3464 DECL_ARTIFICIAL (d
) = 1;
3465 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3472 /* Push the declarations of builtin types into the namespace.
3473 RID_INDEX is the index of the builtin type in the array
3474 RID_POINTERS. NAME is the name used when looking up the builtin
3475 type. TYPE is the _TYPE node for the builtin type. */
3478 record_builtin_type (enum rid rid_index
,
3482 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3483 tree tdecl
= NULL_TREE
;
3485 if ((int) rid_index
< (int) RID_MAX
)
3486 rname
= ridpointers
[(int) rid_index
];
3488 tname
= get_identifier (name
);
3490 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3491 eliminated. Built-in types should not be looked up name; their
3492 names are keywords that the parser can recognize. However, there
3493 is code in c-common.c that uses identifier_global_value to look
3494 up built-in types by name. */
3497 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3498 DECL_ARTIFICIAL (tdecl
) = 1;
3499 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3505 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3506 DECL_ARTIFICIAL (tdecl
) = 1;
3508 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3511 if (!TYPE_NAME (type
))
3512 TYPE_NAME (type
) = tdecl
;
3515 debug_hooks
->type_decl (tdecl
, 0);
3518 /* Record one of the standard Java types.
3519 * Declare it as having the given NAME.
3520 * If SIZE > 0, it is the size of one of the integral types;
3521 * otherwise it is the negative of the size of one of the other types. */
3524 record_builtin_java_type (const char* name
, int size
)
3529 type
= build_nonstandard_integer_type (size
, 0);
3530 type
= build_distinct_type_copy (type
);
3532 else if (size
> -32)
3535 /* "__java_char" or ""__java_boolean". */
3536 type
= build_nonstandard_integer_type (-size
, 1);
3537 type
= build_distinct_type_copy (type
);
3538 /* Get the signed type cached and attached to the unsigned type,
3539 so it doesn't get garbage-collected at "random" times,
3540 causing potential codegen differences out of different UIDs
3541 and different alias set numbers. */
3542 stype
= build_nonstandard_integer_type (-size
, 0);
3543 stype
= build_distinct_type_copy (stype
);
3544 TREE_CHAIN (type
) = stype
;
3545 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3548 { /* "__java_float" or ""__java_double". */
3549 type
= make_node (REAL_TYPE
);
3550 TYPE_PRECISION (type
) = - size
;
3553 record_builtin_type (RID_MAX
, name
, type
);
3554 decl
= TYPE_NAME (type
);
3556 /* Suppress generate debug symbol entries for these types,
3557 since for normal C++ they are just clutter.
3558 However, push_lang_context undoes this if extern "Java" is seen. */
3559 DECL_IGNORED_P (decl
) = 1;
3561 TYPE_FOR_JAVA (type
) = 1;
3565 /* Push a type into the namespace so that the back ends ignore it. */
3568 record_unknown_type (tree type
, const char* name
)
3570 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3571 TYPE_DECL
, get_identifier (name
), type
));
3572 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3573 DECL_IGNORED_P (decl
) = 1;
3574 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3575 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3576 TYPE_ALIGN (type
) = 1;
3577 TYPE_USER_ALIGN (type
) = 0;
3578 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3581 /* A string for which we should create an IDENTIFIER_NODE at
3584 typedef struct predefined_identifier
3586 /* The name of the identifier. */
3587 const char *const name
;
3588 /* The place where the IDENTIFIER_NODE should be stored. */
3590 /* Nonzero if this is the name of a constructor or destructor. */
3591 const int ctor_or_dtor_p
;
3592 } predefined_identifier
;
3594 /* Create all the predefined identifiers. */
3597 initialize_predefined_identifiers (void)
3599 const predefined_identifier
*pid
;
3601 /* A table of identifiers to create at startup. */
3602 static const predefined_identifier predefined_identifiers
[] = {
3603 { "C++", &lang_name_cplusplus
, 0 },
3604 { "C", &lang_name_c
, 0 },
3605 { "Java", &lang_name_java
, 0 },
3606 /* Some of these names have a trailing space so that it is
3607 impossible for them to conflict with names written by users. */
3608 { "__ct ", &ctor_identifier
, 1 },
3609 { "__base_ctor ", &base_ctor_identifier
, 1 },
3610 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3611 { "__dt ", &dtor_identifier
, 1 },
3612 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3613 { "__base_dtor ", &base_dtor_identifier
, 1 },
3614 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3615 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3616 { "nelts", &nelts_identifier
, 0 },
3617 { THIS_NAME
, &this_identifier
, 0 },
3618 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3619 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3620 { "_vptr", &vptr_identifier
, 0 },
3621 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3622 { "::", &global_scope_name
, 0 },
3623 { "std", &std_identifier
, 0 },
3627 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3629 *pid
->node
= get_identifier (pid
->name
);
3630 if (pid
->ctor_or_dtor_p
)
3631 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3635 /* Create the predefined scalar types of C,
3636 and some nodes representing standard constants (0, 1, (void *)0).
3637 Initialize the global binding level.
3638 Make definitions for built-in primitive functions. */
3641 cxx_init_decl_processing (void)
3644 tree void_ftype_ptr
;
3646 /* Create all the identifiers we need. */
3647 initialize_predefined_identifiers ();
3649 /* Create the global variables. */
3650 push_to_top_level ();
3652 current_function_decl
= NULL_TREE
;
3653 current_binding_level
= NULL
;
3654 /* Enter the global namespace. */
3655 gcc_assert (global_namespace
== NULL_TREE
);
3656 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3658 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3659 TREE_PUBLIC (global_namespace
) = 1;
3660 begin_scope (sk_namespace
, global_namespace
);
3662 if (flag_visibility_ms_compat
)
3663 default_visibility
= VISIBILITY_HIDDEN
;
3666 current_lang_name
= lang_name_c
;
3668 /* Create the `std' namespace. */
3669 push_namespace (std_identifier
);
3670 std_node
= current_namespace
;
3673 c_common_nodes_and_builtins ();
3675 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3676 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3677 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3678 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3679 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3680 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3681 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3682 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3684 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3686 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3687 truthvalue_type_node
= boolean_type_node
;
3688 truthvalue_false_node
= boolean_false_node
;
3689 truthvalue_true_node
= boolean_true_node
;
3691 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3692 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3693 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3696 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3699 delta_type_node
= ptrdiff_type_node
;
3700 vtable_index_type
= ptrdiff_type_node
;
3702 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3703 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3704 void_ftype_ptr
= build_function_type_list (void_type_node
,
3705 ptr_type_node
, NULL_TREE
);
3707 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3709 /* C++ extensions */
3711 unknown_type_node
= make_node (LANG_TYPE
);
3712 record_unknown_type (unknown_type_node
, "unknown type");
3714 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3715 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3717 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3719 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3720 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3722 init_list_type_node
= make_node (LANG_TYPE
);
3723 record_unknown_type (init_list_type_node
, "init list");
3726 /* Make sure we get a unique function type, so we can give
3727 its pointer type a name. (This wins for gdb.) */
3728 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3729 TREE_TYPE (vfunc_type
) = integer_type_node
;
3730 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3731 layout_type (vfunc_type
);
3733 vtable_entry_type
= build_pointer_type (vfunc_type
);
3735 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3738 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3739 layout_type (vtbl_type_node
);
3740 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3741 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3742 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3743 layout_type (vtbl_ptr_type_node
);
3744 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3746 push_namespace (get_identifier ("__cxxabiv1"));
3747 abi_node
= current_namespace
;
3750 global_type_node
= make_node (LANG_TYPE
);
3751 record_unknown_type (global_type_node
, "global type");
3754 current_lang_name
= lang_name_cplusplus
;
3757 tree newattrs
, extvisattr
;
3758 tree newtype
, deltype
;
3759 tree ptr_ftype_sizetype
;
3763 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3764 if (cxx_dialect
== cxx98
)
3767 tree bad_alloc_type_node
;
3768 tree bad_alloc_decl
;
3770 push_namespace (std_identifier
);
3771 bad_alloc_id
= get_identifier ("bad_alloc");
3772 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3773 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3775 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3776 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3780 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3783 new_eh_spec
= noexcept_false_spec
;
3785 /* Ensure attribs.c is initialized. */
3787 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3789 newattrs
= tree_cons (get_identifier ("alloc_size"),
3790 build_tree_list (NULL_TREE
, integer_one_node
),
3792 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3793 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3794 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3795 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3796 push_cp_library_fn (NEW_EXPR
, newtype
);
3797 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3798 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3799 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3801 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3802 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3803 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3804 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3805 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3806 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3807 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3808 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3812 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3814 /* Perform other language dependent initializations. */
3815 init_class_processing ();
3816 init_rtti_processing ();
3817 init_template_processing ();
3819 if (flag_exceptions
)
3820 init_exception_processing ();
3822 if (! supports_one_only ())
3825 make_fname_decl
= cp_make_fname_decl
;
3826 start_fname_decls ();
3828 /* Show we use EH for cleanups. */
3829 if (flag_exceptions
)
3830 using_eh_for_cleanups ();
3833 /* Generate an initializer for a function naming variable from
3834 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3835 filled in with the type of the init. */
3838 cp_fname_init (const char* name
, tree
*type_p
)
3840 tree domain
= NULL_TREE
;
3842 tree init
= NULL_TREE
;
3847 length
= strlen (name
);
3848 domain
= build_index_type (size_int (length
));
3849 init
= build_string (length
+ 1, name
);
3852 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3853 type
= build_cplus_array_type (type
, domain
);
3858 TREE_TYPE (init
) = type
;
3860 init
= error_mark_node
;
3865 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3866 the decl, LOC is the location to give the decl, NAME is the
3867 initialization string and TYPE_DEP indicates whether NAME depended
3868 on the type of the function. We make use of that to detect
3869 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3870 at the point of first use, so we mustn't push the decl now. */
3873 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3875 const char *const name
= (type_dep
&& processing_template_decl
3876 ? NULL
: fname_as_string (type_dep
));
3878 tree init
= cp_fname_init (name
, &type
);
3879 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3882 free (CONST_CAST (char *, name
));
3884 /* As we're using pushdecl_with_scope, we must set the context. */
3885 DECL_CONTEXT (decl
) = current_function_decl
;
3887 TREE_STATIC (decl
) = 1;
3888 TREE_READONLY (decl
) = 1;
3889 DECL_ARTIFICIAL (decl
) = 1;
3891 TREE_USED (decl
) = 1;
3893 if (current_function_decl
)
3895 cp_binding_level
*b
= current_binding_level
;
3896 if (b
->kind
== sk_function_parms
)
3897 return error_mark_node
;
3898 while (b
->level_chain
->kind
!= sk_function_parms
)
3900 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3901 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3902 LOOKUP_ONLYCONVERTING
);
3906 DECL_THIS_STATIC (decl
) = true;
3907 pushdecl_top_level_and_finish (decl
, init
);
3914 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3916 tree id
= DECL_NAME (decl
);
3917 const char *name
= IDENTIFIER_POINTER (id
);
3919 retrofit_lang_decl (decl
);
3921 DECL_ARTIFICIAL (decl
) = 1;
3922 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3923 SET_DECL_LANGUAGE (decl
, lang_c
);
3924 /* Runtime library routines are, by definition, available in an
3925 external shared object. */
3926 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3927 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3929 DECL_CONTEXT (decl
) = context
;
3932 pushdecl_top_level (decl
);
3936 /* A function in the user's namespace should have an explicit
3937 declaration before it is used. Mark the built-in function as
3938 anticipated but not actually declared. */
3939 if (name
[0] != '_' || name
[1] != '_')
3940 DECL_ANTICIPATED (decl
) = 1;
3941 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3943 size_t len
= strlen (name
);
3945 /* Treat __*_chk fortification functions as anticipated as well,
3946 unless they are __builtin_*. */
3947 if (len
> strlen ("___chk")
3948 && memcmp (name
+ len
- strlen ("_chk"),
3949 "_chk", strlen ("_chk") + 1) == 0)
3950 DECL_ANTICIPATED (decl
) = 1;
3957 cxx_builtin_function (tree decl
)
3959 tree id
= DECL_NAME (decl
);
3960 const char *name
= IDENTIFIER_POINTER (id
);
3961 /* All builtins that don't begin with an '_' should additionally
3962 go in the 'std' namespace. */
3965 tree decl2
= copy_node(decl
);
3966 push_namespace (std_identifier
);
3967 builtin_function_1 (decl2
, std_node
, false);
3971 return builtin_function_1 (decl
, NULL_TREE
, false);
3974 /* Like cxx_builtin_function, but guarantee the function is added to the global
3975 scope. This is to allow function specific options to add new machine
3976 dependent builtins when the target ISA changes via attribute((target(...)))
3977 which saves space on program startup if the program does not use non-generic
3981 cxx_builtin_function_ext_scope (tree decl
)
3984 tree id
= DECL_NAME (decl
);
3985 const char *name
= IDENTIFIER_POINTER (id
);
3986 /* All builtins that don't begin with an '_' should additionally
3987 go in the 'std' namespace. */
3990 tree decl2
= copy_node(decl
);
3991 push_namespace (std_identifier
);
3992 builtin_function_1 (decl2
, std_node
, true);
3996 return builtin_function_1 (decl
, NULL_TREE
, true);
3999 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4000 function. Not called directly. */
4003 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
4005 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4006 DECL_EXTERNAL (fn
) = 1;
4007 TREE_PUBLIC (fn
) = 1;
4008 DECL_ARTIFICIAL (fn
) = 1;
4009 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4010 SET_DECL_LANGUAGE (fn
, lang_c
);
4011 /* Runtime library routines are, by definition, available in an
4012 external shared object. */
4013 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4014 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4018 /* Returns the _DECL for a library function with C linkage.
4019 We assume that such functions never throw; if this is incorrect,
4020 callers should unset TREE_NOTHROW. */
4023 build_library_fn (tree name
, tree type
)
4025 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
4026 TREE_NOTHROW (fn
) = 1;
4030 /* Returns the _DECL for a library function with C++ linkage. */
4033 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
4035 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
4036 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
4037 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4038 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4042 /* Like build_library_fn, but takes a C string instead of an
4046 build_library_fn_ptr (const char* name
, tree type
)
4048 return build_library_fn (get_identifier (name
), type
);
4051 /* Like build_cp_library_fn, but takes a C string instead of an
4055 build_cp_library_fn_ptr (const char* name
, tree type
)
4057 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
4060 /* Like build_library_fn, but also pushes the function so that we will
4061 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4062 may throw exceptions listed in RAISES. */
4065 push_library_fn (tree name
, tree type
, tree raises
)
4070 type
= build_exception_variant (type
, raises
);
4072 fn
= build_library_fn (name
, type
);
4073 pushdecl_top_level (fn
);
4077 /* Like build_cp_library_fn, but also pushes the function so that it
4078 will be found by normal lookup. */
4081 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4083 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4088 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4092 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4096 push_void_library_fn (tree name
, tree parmtypes
)
4098 tree type
= build_function_type (void_type_node
, parmtypes
);
4099 return push_library_fn (name
, type
, NULL_TREE
);
4102 /* Like push_library_fn, but also note that this function throws
4103 and does not return. Used for __throw_foo and the like. */
4106 push_throw_library_fn (tree name
, tree type
)
4108 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4109 TREE_THIS_VOLATILE (fn
) = 1;
4110 TREE_NOTHROW (fn
) = 0;
4114 /* When we call finish_struct for an anonymous union, we create
4115 default copy constructors and such. But, an anonymous union
4116 shouldn't have such things; this function undoes the damage to the
4117 anonymous union type T.
4119 (The reason that we create the synthesized methods is that we don't
4120 distinguish `union { int i; }' from `typedef union { int i; } U'.
4121 The first is an anonymous union; the second is just an ordinary
4125 fixup_anonymous_aggr (tree t
)
4129 /* Wipe out memory of synthesized methods. */
4130 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4131 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4132 TYPE_HAS_COPY_CTOR (t
) = 0;
4133 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4134 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4135 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4137 /* Splice the implicitly generated functions out of the TYPE_METHODS
4139 q
= &TYPE_METHODS (t
);
4142 if (DECL_ARTIFICIAL (*q
))
4143 *q
= TREE_CHAIN (*q
);
4145 q
= &DECL_CHAIN (*q
);
4148 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4149 if (TYPE_METHODS (t
))
4151 tree decl
= TYPE_MAIN_DECL (t
);
4153 if (TREE_CODE (t
) != UNION_TYPE
)
4154 error_at (DECL_SOURCE_LOCATION (decl
),
4155 "an anonymous struct cannot have function members");
4157 error_at (DECL_SOURCE_LOCATION (decl
),
4158 "an anonymous union cannot have function members");
4161 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4162 assignment operators (because they cannot have these methods themselves).
4163 For anonymous unions this is already checked because they are not allowed
4164 in any union, otherwise we have to check it. */
4165 if (TREE_CODE (t
) != UNION_TYPE
)
4169 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4170 if (TREE_CODE (field
) == FIELD_DECL
)
4172 type
= TREE_TYPE (field
);
4173 if (CLASS_TYPE_P (type
))
4175 if (TYPE_NEEDS_CONSTRUCTING (type
))
4176 error ("member %q+#D with constructor not allowed "
4177 "in anonymous aggregate", field
);
4178 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4179 error ("member %q+#D with destructor not allowed "
4180 "in anonymous aggregate", field
);
4181 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4182 error ("member %q+#D with copy assignment operator "
4183 "not allowed in anonymous aggregate", field
);
4189 /* Warn for an attribute located at LOCATION that appertains to the
4190 class type CLASS_TYPE that has not been properly placed after its
4191 class-key, in it class-specifier. */
4194 warn_misplaced_attr_for_class_type (source_location location
,
4197 gcc_assert (TAGGED_TYPE_P (class_type
));
4199 warning_at (location
, OPT_Wattributes
,
4200 "attribute ignored in declaration "
4201 "of %q#T", class_type
);
4203 "attribute for %q#T must follow the %qs keyword",
4204 class_type
, class_key_or_enum_as_string (class_type
));
4207 /* Make sure that a declaration with no declarator is well-formed, i.e.
4208 just declares a tagged type or anonymous union.
4210 Returns the type declared; or NULL_TREE if none. */
4213 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4214 bool explicit_type_instantiation_p
)
4216 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4217 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4218 /* If a class, struct, or enum type is declared by the DECLSPECS
4219 (i.e, if a class-specifier, enum-specifier, or non-typename
4220 elaborated-type-specifier appears in the DECLSPECS),
4221 DECLARED_TYPE is set to the corresponding type. */
4222 tree declared_type
= NULL_TREE
;
4223 bool error_p
= false;
4225 if (declspecs
->multiple_types_p
)
4226 error ("multiple types in one declaration");
4227 else if (declspecs
->redefined_builtin_type
)
4229 if (!in_system_header
)
4230 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4231 "redeclaration of C++ built-in type %qT",
4232 declspecs
->redefined_builtin_type
);
4237 && TYPE_P (declspecs
->type
)
4238 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4239 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4240 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4241 declared_type
= declspecs
->type
;
4242 else if (declspecs
->type
== error_mark_node
)
4244 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4245 permerror (input_location
, "declaration does not declare anything");
4246 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4248 error ("%<auto%> can only be specified for variables "
4249 "or function declarations");
4250 return error_mark_node
;
4252 /* Check for an anonymous union. */
4253 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4254 && TYPE_ANONYMOUS_P (declared_type
))
4256 /* 7/3 In a simple-declaration, the optional init-declarator-list
4257 can be omitted only when declaring a class (clause 9) or
4258 enumeration (7.2), that is, when the decl-specifier-seq contains
4259 either a class-specifier, an elaborated-type-specifier with
4260 a class-key (9.1), or an enum-specifier. In these cases and
4261 whenever a class-specifier or enum-specifier is present in the
4262 decl-specifier-seq, the identifiers in these specifiers are among
4263 the names being declared by the declaration (as class-name,
4264 enum-names, or enumerators, depending on the syntax). In such
4265 cases, and except for the declaration of an unnamed bit-field (9.6),
4266 the decl-specifier-seq shall introduce one or more names into the
4267 program, or shall redeclare a name introduced by a previous
4268 declaration. [Example:
4269 enum { }; // ill-formed
4270 typedef class { }; // ill-formed
4274 error ("missing type-name in typedef-declaration");
4277 /* Anonymous unions are objects, so they can have specifiers. */;
4278 SET_ANON_AGGR_TYPE_P (declared_type
);
4280 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4281 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4286 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4287 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4288 error ("%qs can only be specified for functions",
4289 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4290 ? "inline" : "virtual");
4292 && (!current_class_type
4293 || current_scope () != current_class_type
))
4294 error ("%<friend%> can only be specified inside a class");
4295 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4296 error ("%<explicit%> can only be specified for constructors");
4297 else if (declspecs
->storage_class
)
4298 error ("a storage class can only be specified for objects "
4300 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4301 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4302 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4303 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4304 error ("qualifiers can only be specified for objects "
4306 else if (saw_typedef
)
4307 warning (0, "%<typedef%> was ignored in this declaration");
4308 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4309 error ("%<constexpr%> cannot be used for type declarations");
4312 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4315 if (!CLASS_TYPE_P (declared_type
)
4316 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4317 /* For a non-template class, use the name location. */
4318 loc
= location_of (declared_type
);
4320 /* For a template class (an explicit instantiation), use the
4321 current location. */
4322 loc
= input_location
;
4324 if (explicit_type_instantiation_p
)
4325 /* [dcl.attr.grammar]/4:
4327 No attribute-specifier-seq shall appertain to an explicit
4330 warning_at (loc
, OPT_Wattributes
,
4331 "attribute ignored in explicit instantiation %q#T",
4334 "no attribute can be applied to "
4335 "an explicit instantiation");
4338 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4341 return declared_type
;
4344 /* Called when a declaration is seen that contains no names to declare.
4345 If its type is a reference to a structure, union or enum inherited
4346 from a containing scope, shadow that tag name for the current scope
4347 with a forward reference.
4348 If its type defines a new named structure or union
4349 or defines an enum, it is valid but we need not do anything here.
4350 Otherwise, it is an error.
4352 C++: may have to grok the declspecs to learn about static,
4353 complain for anonymous unions.
4355 Returns the TYPE declared -- or NULL_TREE if none. */
4358 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4360 tree t
= check_tag_decl (declspecs
,
4361 /*explicit_type_instantiation_p=*/false);
4366 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4369 /* This is where the variables in an anonymous union are
4370 declared. An anonymous union declaration looks like:
4372 because there is no declarator after the union, the parser
4373 sends that declaration here. */
4374 if (ANON_AGGR_TYPE_P (t
))
4376 fixup_anonymous_aggr (t
);
4378 if (TYPE_FIELDS (t
))
4380 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4381 declspecs
, NORMAL
, 0, NULL
);
4382 finish_anon_union (decl
);
4389 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4392 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4393 const cp_declarator
*declarator
,
4394 bool is_template_arg
)
4398 enum decl_context context
4399 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4400 attrs
= type_specifiers
->attributes
;
4401 type_specifiers
->attributes
= NULL_TREE
;
4402 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4403 if (attrs
&& type
!= error_mark_node
)
4405 if (CLASS_TYPE_P (type
))
4406 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4407 "outside of definition", type
);
4408 else if (MAYBE_CLASS_TYPE_P (type
))
4409 /* A template type parameter or other dependent type. */
4410 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4411 "type %qT without an associated declaration", type
);
4413 cplus_decl_attributes (&type
, attrs
, 0);
4418 /* Process a DECLARATOR for a function-scope variable declaration,
4419 namespace-scope variable declaration, or function declaration.
4420 (Function definitions go through start_function; class member
4421 declarations appearing in the body of the class go through
4422 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4423 If an error occurs, the error_mark_node is returned instead.
4425 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4426 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4427 for an explicitly defaulted function, or SD_DELETED for an explicitly
4428 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4429 implicitly initialized via a default constructor. ATTRIBUTES and
4430 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4432 The scope represented by the context of the returned DECL is pushed
4433 (if it is not the global namespace) and is assigned to
4434 *PUSHED_SCOPE_P. The caller is then responsible for calling
4435 pop_scope on *PUSHED_SCOPE_P if it is set. */
4438 start_decl (const cp_declarator
*declarator
,
4439 cp_decl_specifier_seq
*declspecs
,
4442 tree prefix_attributes
,
4443 tree
*pushed_scope_p
)
4451 *pushed_scope_p
= NULL_TREE
;
4453 /* An object declared as __attribute__((deprecated)) suppresses
4454 warnings of uses of other deprecated items. */
4455 if (lookup_attribute ("deprecated", attributes
))
4456 deprecated_state
= DEPRECATED_SUPPRESS
;
4458 attributes
= chainon (attributes
, prefix_attributes
);
4460 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4463 deprecated_state
= DEPRECATED_NORMAL
;
4465 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4466 || decl
== error_mark_node
)
4467 return error_mark_node
;
4469 context
= CP_DECL_CONTEXT (decl
);
4470 if (context
!= global_namespace
)
4471 *pushed_scope_p
= push_scope (context
);
4474 /* Is it valid for this decl to have an initializer at all?
4475 If not, set INITIALIZED to zero, which will indirectly
4476 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4477 switch (TREE_CODE (decl
))
4480 error ("typedef %qD is initialized (use decltype instead)", decl
);
4481 return error_mark_node
;
4484 if (initialized
== SD_DELETED
)
4485 /* We'll handle the rest of the semantics later, but we need to
4486 set this now so it's visible to duplicate_decls. */
4487 DECL_DELETED_FN (decl
) = 1;
4496 if (! toplevel_bindings_p ()
4497 && DECL_EXTERNAL (decl
))
4498 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4500 DECL_EXTERNAL (decl
) = 0;
4501 if (toplevel_bindings_p ())
4502 TREE_STATIC (decl
) = 1;
4504 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4506 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4507 record_key_method_defined (decl
);
4509 /* If this is a typedef that names the class for linkage purposes
4510 (7.1.3p8), apply any attributes directly to the type. */
4511 if (TREE_CODE (decl
) == TYPE_DECL
4512 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4513 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4514 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4518 /* Set attributes here so if duplicate decl, will have proper attributes. */
4519 cplus_decl_attributes (&decl
, attributes
, flags
);
4521 /* Dllimported symbols cannot be defined. Static data members (which
4522 can be initialized in-class and dllimported) go through grokfield,
4523 not here, so we don't need to exclude those decls when checking for
4525 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4527 error ("definition of %q#D is marked %<dllimport%>", decl
);
4528 DECL_DLLIMPORT_P (decl
) = 0;
4531 /* If #pragma weak was used, mark the decl weak now. */
4532 if (!processing_template_decl
)
4533 maybe_apply_pragma_weak (decl
);
4535 if (TREE_CODE (decl
) == FUNCTION_DECL
4536 && DECL_DECLARED_INLINE_P (decl
)
4537 && DECL_UNINLINABLE (decl
)
4538 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4539 warning (0, "inline function %q+D given attribute noinline", decl
);
4541 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4543 if (TREE_CODE (decl
) == VAR_DECL
)
4545 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4546 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4547 error ("%q#D is not a static member of %q#T", decl
, context
);
4550 if (DECL_CONTEXT (field
) != context
)
4552 if (!same_type_p (DECL_CONTEXT (field
), context
))
4553 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4554 "to be defined as %<%T::%D%>",
4555 DECL_CONTEXT (field
), DECL_NAME (decl
),
4556 context
, DECL_NAME (decl
));
4557 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4559 /* Static data member are tricky; an in-class initialization
4560 still doesn't provide a definition, so the in-class
4561 declaration will have DECL_EXTERNAL set, but will have an
4562 initialization. Thus, duplicate_decls won't warn
4563 about this situation, and so we check here. */
4564 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4565 error ("duplicate initialization of %qD", decl
);
4566 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4568 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4569 && !DECL_DECLARED_CONSTEXPR_P (field
))
4570 error ("%qD declared %<constexpr%> outside its class", field
);
4575 tree field
= check_classfn (context
, decl
,
4576 (processing_template_decl
4577 > template_class_depth (context
))
4578 ? current_template_parms
4580 if (field
&& field
!= error_mark_node
4581 && duplicate_decls (decl
, field
,
4582 /*newdecl_is_friend=*/false))
4586 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4587 DECL_IN_AGGR_P (decl
) = 0;
4588 /* Do not mark DECL as an explicit specialization if it was not
4589 already marked as an instantiation; a declaration should
4590 never be marked as a specialization unless we know what
4591 template is being specialized. */
4592 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4594 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4596 /* [temp.expl.spec] An explicit specialization of a static data
4597 member of a template is a definition if the declaration
4598 includes an initializer; otherwise, it is a declaration.
4600 We check for processing_specialization so this only applies
4601 to the new specialization syntax. */
4602 if (!initialized
&& processing_specialization
)
4603 DECL_EXTERNAL (decl
) = 1;
4606 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4607 /* Aliases are definitions. */
4609 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4613 was_public
= TREE_PUBLIC (decl
);
4615 /* Enter this declaration into the symbol table. */
4616 decl
= maybe_push_decl (decl
);
4618 if (processing_template_decl
)
4619 decl
= push_template_decl (decl
);
4620 if (decl
== error_mark_node
)
4621 return error_mark_node
;
4623 if (TREE_CODE (decl
) == VAR_DECL
4624 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4625 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4627 /* This is a const variable with implicit 'static'. Set
4628 DECL_THIS_STATIC so we can tell it from variables that are
4629 !TREE_PUBLIC because of the anonymous namespace. */
4630 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4631 DECL_THIS_STATIC (decl
) = 1;
4634 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4635 start_decl_1 (decl
, initialized
);
4640 /* Process the declaration of a variable DECL. INITIALIZED is true
4641 iff DECL is explicitly initialized. (INITIALIZED is false if the
4642 variable is initialized via an implicitly-called constructor.)
4643 This function must be called for ordinary variables (including, for
4644 example, implicit instantiations of templates), but must not be
4645 called for template declarations. */
4648 start_decl_1 (tree decl
, bool initialized
)
4652 bool aggregate_definition_p
;
4654 gcc_assert (!processing_template_decl
);
4656 if (error_operand_p (decl
))
4659 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4661 type
= TREE_TYPE (decl
);
4662 complete_p
= COMPLETE_TYPE_P (type
);
4663 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4665 /* If an explicit initializer is present, or if this is a definition
4666 of an aggregate, then we need a complete type at this point.
4667 (Scalars are always complete types, so there is nothing to
4668 check.) This code just sets COMPLETE_P; errors (if necessary)
4669 are issued below. */
4670 if ((initialized
|| aggregate_definition_p
)
4672 && COMPLETE_TYPE_P (complete_type (type
)))
4675 /* We will not yet have set TREE_READONLY on DECL if the type
4676 was "const", but incomplete, before this point. But, now, we
4677 have a complete type, so we can try again. */
4678 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4682 /* Is it valid for this decl to have an initializer at all? */
4684 /* Don't allow initializations for incomplete types except for
4685 arrays which might be completed by the initialization. */
4687 ; /* A complete type is ok. */
4688 else if (type_uses_auto (type
))
4689 ; /* An auto type is ok. */
4690 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4692 error ("variable %q#D has initializer but incomplete type", decl
);
4693 type
= TREE_TYPE (decl
) = error_mark_node
;
4695 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4697 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4698 error ("elements of array %q#D have incomplete type", decl
);
4699 /* else we already gave an error in start_decl. */
4702 else if (aggregate_definition_p
&& !complete_p
)
4704 if (type_uses_auto (type
))
4705 error ("declaration of %q#D has no initializer", decl
);
4707 error ("aggregate %q#D has incomplete type and cannot be defined",
4709 /* Change the type so that assemble_variable will give
4710 DECL an rtl we can live with: (mem (const_int 0)). */
4711 type
= TREE_TYPE (decl
) = error_mark_node
;
4714 /* Create a new scope to hold this declaration if necessary.
4715 Whether or not a new scope is necessary cannot be determined
4716 until after the type has been completed; if the type is a
4717 specialization of a class template it is not until after
4718 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4719 will be set correctly. */
4720 maybe_push_cleanup_level (type
);
4723 /* Handle initialization of references. DECL, TYPE, and INIT have the
4724 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4725 but will be set to a new CLEANUP_STMT if a temporary is created
4726 that must be destroyed subsequently.
4728 Returns an initializer expression to use to initialize DECL, or
4729 NULL if the initialization can be performed statically.
4731 Quotes on semantics can be found in ARM 8.4.3. */
4734 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4736 if (init
== NULL_TREE
)
4738 if ((DECL_LANG_SPECIFIC (decl
) == 0
4739 || DECL_IN_AGGR_P (decl
) == 0)
4740 && ! DECL_THIS_EXTERN (decl
))
4741 error ("%qD declared as reference but not initialized", decl
);
4745 if (TREE_CODE (init
) == TREE_LIST
)
4746 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4747 tf_warning_or_error
);
4749 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4750 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4751 /* Note: default conversion is only called in very special cases. */
4752 init
= decay_conversion (init
, tf_warning_or_error
);
4754 /* Convert INIT to the reference type TYPE. This may involve the
4755 creation of a temporary, whose lifetime must be the same as that
4756 of the reference. If so, a DECL_EXPR for the temporary will be
4757 added just after the DECL_EXPR for DECL. That's why we don't set
4758 DECL_INITIAL for local references (instead assigning to them
4759 explicitly); we need to allow the temporary to be initialized
4761 return initialize_reference (type
, init
, flags
,
4762 tf_warning_or_error
);
4765 /* Designated initializers in arrays are not supported in GNU C++.
4766 The parser cannot detect this error since it does not know whether
4767 a given brace-enclosed initializer is for a class type or for an
4768 array. This function checks that CE does not use a designated
4769 initializer. If it does, an error is issued. Returns true if CE
4770 is valid, i.e., does not have a designated initializer. */
4773 check_array_designated_initializer (const constructor_elt
*ce
,
4774 unsigned HOST_WIDE_INT index
)
4776 /* Designated initializers for array elements are not supported. */
4779 /* The parser only allows identifiers as designated
4781 if (ce
->index
== error_mark_node
)
4782 error ("name used in a GNU-style designated "
4783 "initializer for an array");
4784 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4786 /* A C99 designator is OK if it matches the current index. */
4787 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4790 sorry ("non-trivial designated initializers not supported");
4794 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4795 error ("name %qD used in a GNU-style designated "
4796 "initializer for an array", ce
->index
);
4804 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4805 array until we finish parsing the initializer. If that's the
4806 situation we're in, update DECL accordingly. */
4809 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4811 tree type
= TREE_TYPE (decl
);
4813 if (TREE_CODE (type
) == ARRAY_TYPE
4814 && TYPE_DOMAIN (type
) == NULL_TREE
4815 && TREE_CODE (decl
) != TYPE_DECL
)
4817 /* do_default is really a C-ism to deal with tentative definitions.
4818 But let's leave it here to ease the eventual merge. */
4819 int do_default
= !DECL_EXTERNAL (decl
);
4820 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4823 /* Check that there are no designated initializers in INIT, as
4824 those are not supported in GNU C++, and as the middle-end
4825 will crash if presented with a non-numeric designated
4827 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4829 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4830 constructor_elt
*ce
;
4832 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4833 if (!check_array_designated_initializer (ce
, i
))
4839 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4843 error ("initializer fails to determine size of %qD", decl
);
4844 TREE_TYPE (decl
) = error_mark_node
;
4846 else if (failure
== 2)
4850 error ("array size missing in %qD", decl
);
4851 TREE_TYPE (decl
) = error_mark_node
;
4853 /* If a `static' var's size isn't known, make it extern as
4854 well as static, so it does not get allocated. If it's not
4855 `static', then don't mark it extern; finish_incomplete_decl
4856 will give it a default size and it will get allocated. */
4857 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4858 DECL_EXTERNAL (decl
) = 1;
4860 else if (failure
== 3)
4862 error ("zero-size array %qD", decl
);
4863 TREE_TYPE (decl
) = error_mark_node
;
4867 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4869 relayout_decl (decl
);
4873 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4874 any appropriate error messages regarding the layout. */
4877 layout_var_decl (tree decl
)
4881 type
= TREE_TYPE (decl
);
4882 if (type
== error_mark_node
)
4885 /* If we haven't already layed out this declaration, do so now.
4886 Note that we must not call complete type for an external object
4887 because it's type might involve templates that we are not
4888 supposed to instantiate yet. (And it's perfectly valid to say
4889 `extern X x' for some incomplete type `X'.) */
4890 if (!DECL_EXTERNAL (decl
))
4891 complete_type (type
);
4892 if (!DECL_SIZE (decl
)
4893 && TREE_TYPE (decl
) != error_mark_node
4894 && (COMPLETE_TYPE_P (type
)
4895 || (TREE_CODE (type
) == ARRAY_TYPE
4896 && !TYPE_DOMAIN (type
)
4897 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4898 layout_decl (decl
, 0);
4900 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4902 /* An automatic variable with an incomplete type: that is an error.
4903 Don't talk about array types here, since we took care of that
4904 message in grokdeclarator. */
4905 error ("storage size of %qD isn%'t known", decl
);
4906 TREE_TYPE (decl
) = error_mark_node
;
4909 /* Keep this code around in case we later want to control debug info
4910 based on whether a type is "used". (jason 1999-11-11) */
4912 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4913 /* Let debugger know it should output info for this type. */
4914 note_debug_info_needed (ttype
);
4916 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4917 note_debug_info_needed (DECL_CONTEXT (decl
));
4920 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4921 && DECL_SIZE (decl
) != NULL_TREE
4922 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4924 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4925 constant_expression_warning (DECL_SIZE (decl
));
4928 error ("storage size of %qD isn%'t constant", decl
);
4929 TREE_TYPE (decl
) = error_mark_node
;
4934 /* If a local static variable is declared in an inline function, or if
4935 we have a weak definition, we must endeavor to create only one
4936 instance of the variable at link-time. */
4939 maybe_commonize_var (tree decl
)
4941 /* Static data in a function with comdat linkage also has comdat
4943 if (TREE_STATIC (decl
)
4944 /* Don't mess with __FUNCTION__. */
4945 && ! DECL_ARTIFICIAL (decl
)
4946 && DECL_FUNCTION_SCOPE_P (decl
)
4947 && vague_linkage_p (DECL_CONTEXT (decl
)))
4951 /* With weak symbols, we simply make the variable COMDAT;
4952 that will cause copies in multiple translations units to
4954 comdat_linkage (decl
);
4958 if (DECL_INITIAL (decl
) == NULL_TREE
4959 || DECL_INITIAL (decl
) == error_mark_node
)
4961 /* Without weak symbols, we can use COMMON to merge
4962 uninitialized variables. */
4963 TREE_PUBLIC (decl
) = 1;
4964 DECL_COMMON (decl
) = 1;
4968 /* While for initialized variables, we must use internal
4969 linkage -- which means that multiple copies will not
4971 TREE_PUBLIC (decl
) = 0;
4972 DECL_COMMON (decl
) = 0;
4973 warning_at (input_location
, 0,
4974 "sorry: semantics of inline function static "
4975 "data %q+#D are wrong (you%'ll wind up "
4976 "with multiple copies)", decl
);
4977 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4978 " you can work around this by removing "
4983 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4984 /* Set it up again; we might have set DECL_INITIAL since the last
4986 comdat_linkage (decl
);
4989 /* Issue an error message if DECL is an uninitialized const variable. */
4992 check_for_uninitialized_const_var (tree decl
)
4994 tree type
= strip_array_types (TREE_TYPE (decl
));
4996 /* ``Unless explicitly declared extern, a const object does not have
4997 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4999 if (TREE_CODE (decl
) == VAR_DECL
5000 && TREE_CODE (type
) != REFERENCE_TYPE
5001 && CP_TYPE_CONST_P (type
)
5002 && !DECL_INITIAL (decl
))
5004 tree field
= default_init_uninitialized_part (type
);
5008 permerror (DECL_SOURCE_LOCATION (decl
),
5009 "uninitialized const %qD", decl
);
5011 if (CLASS_TYPE_P (type
))
5013 tree defaulted_ctor
;
5015 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5016 "%q#T has no user-provided default constructor", type
);
5017 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5019 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5020 "constructor is not user-provided because it is "
5021 "explicitly defaulted in the class body");
5022 inform (0, "and the implicitly-defined constructor does not "
5023 "initialize %q+#D", field
);
5028 /* Structure holding the current initializer being processed by reshape_init.
5029 CUR is a pointer to the current element being processed, END is a pointer
5030 after the last element present in the initializer. */
5031 typedef struct reshape_iterator_t
5033 constructor_elt
*cur
;
5034 constructor_elt
*end
;
5037 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5039 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5040 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5041 initialized. If there are no more such fields, the return value
5045 next_initializable_field (tree field
)
5048 && (TREE_CODE (field
) != FIELD_DECL
5049 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5050 || DECL_ARTIFICIAL (field
)))
5051 field
= DECL_CHAIN (field
);
5056 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5057 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5058 INTEGER_CST representing the size of the array minus one (the maximum index),
5059 or NULL_TREE if the array was declared without specifying the size. D is
5060 the iterator within the constructor. */
5063 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5064 tsubst_flags_t complain
)
5067 bool sized_array_p
= (max_index
!= NULL_TREE
);
5068 unsigned HOST_WIDE_INT max_index_cst
= 0;
5069 unsigned HOST_WIDE_INT index
;
5071 /* The initializer for an array is always a CONSTRUCTOR. */
5072 new_init
= build_constructor (init_list_type_node
, NULL
);
5076 /* Minus 1 is used for zero sized arrays. */
5077 if (integer_all_onesp (max_index
))
5080 if (host_integerp (max_index
, 1))
5081 max_index_cst
= tree_low_cst (max_index
, 1);
5082 /* sizetype is sign extended, not zero extended. */
5084 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5088 /* Loop until there are no more initializers. */
5090 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5094 constructor_elt
*old_cur
= d
->cur
;
5096 check_array_designated_initializer (d
->cur
, index
);
5097 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5099 if (elt_init
== error_mark_node
)
5100 return error_mark_node
;
5101 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5102 size_int (index
), elt_init
);
5103 if (!TREE_CONSTANT (elt_init
))
5104 TREE_CONSTANT (new_init
) = false;
5106 /* This can happen with an invalid initializer (c++/54501). */
5107 if (d
->cur
== old_cur
&& !sized_array_p
)
5114 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5115 Parameters are the same of reshape_init_r. */
5118 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5120 tree max_index
= NULL_TREE
;
5122 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5124 if (TYPE_DOMAIN (type
))
5125 max_index
= array_type_nelts (type
);
5127 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5130 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5131 Parameters are the same of reshape_init_r. */
5134 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5136 tree max_index
= NULL_TREE
;
5138 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5140 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5142 tree value
= d
->cur
->value
;
5143 if (!same_type_p (TREE_TYPE (value
), type
))
5145 if (complain
& tf_error
)
5146 error ("invalid type %qT as initializer for a vector of type %qT",
5147 TREE_TYPE (d
->cur
->value
), type
);
5148 value
= error_mark_node
;
5154 /* For a vector, we initialize it as an array of the appropriate size. */
5155 if (TREE_CODE (type
) == VECTOR_TYPE
)
5156 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5158 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5161 /* Subroutine of reshape_init_r, processes the initializers for classes
5162 or union. Parameters are the same of reshape_init_r. */
5165 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5166 tsubst_flags_t complain
)
5171 gcc_assert (CLASS_TYPE_P (type
));
5173 /* The initializer for a class is always a CONSTRUCTOR. */
5174 new_init
= build_constructor (init_list_type_node
, NULL
);
5175 field
= next_initializable_field (TYPE_FIELDS (type
));
5181 An initializer for an aggregate member that is an
5182 empty class shall have the form of an empty
5183 initializer-list {}. */
5184 if (!first_initializer_p
)
5186 if (complain
& tf_error
)
5187 error ("initializer for %qT must be brace-enclosed", type
);
5188 return error_mark_node
;
5193 /* Loop through the initializable fields, gathering initializers. */
5194 while (d
->cur
!= d
->end
)
5197 constructor_elt
*old_cur
= d
->cur
;
5199 /* Handle designated initializers, as an extension. */
5202 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5204 if (complain
& tf_error
)
5205 error ("%<[%E] =%> used in a GNU-style designated initializer"
5206 " for class %qT", d
->cur
->index
, type
);
5207 return error_mark_node
;
5210 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5211 /* We already reshaped this. */
5212 gcc_assert (d
->cur
->index
== field
);
5214 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5216 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5218 if (complain
& tf_error
)
5219 error ("%qT has no non-static data member named %qD", type
,
5221 return error_mark_node
;
5225 /* If we processed all the member of the class, we are done. */
5229 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5230 /*first_initializer_p=*/false, complain
);
5231 if (field_init
== error_mark_node
)
5232 return error_mark_node
;
5234 if (d
->cur
== old_cur
&& d
->cur
->index
)
5236 /* This can happen with an invalid initializer for a flexible
5237 array member (c++/54441). */
5238 if (complain
& tf_error
)
5239 error ("invalid initializer for %q#D", field
);
5240 return error_mark_node
;
5243 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5247 When a union is initialized with a brace-enclosed
5248 initializer, the braces shall only contain an
5249 initializer for the first member of the union. */
5250 if (TREE_CODE (type
) == UNION_TYPE
)
5253 field
= next_initializable_field (DECL_CHAIN (field
));
5259 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5260 designators are not valid; either complain or return true to indicate
5261 that reshape_init_r should return error_mark_node. */
5264 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5268 if (complain
& tf_error
)
5269 error ("C99 designator %qE outside aggregate initializer",
5277 /* Subroutine of reshape_init, which processes a single initializer (part of
5278 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5279 iterator within the CONSTRUCTOR which points to the initializer to process.
5280 FIRST_INITIALIZER_P is true if this is the first initializer of the
5281 outermost CONSTRUCTOR node. */
5284 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5285 tsubst_flags_t complain
)
5287 tree init
= d
->cur
->value
;
5289 if (error_operand_p (init
))
5290 return error_mark_node
;
5292 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5293 && has_designator_problem (d
, complain
))
5294 return error_mark_node
;
5296 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5298 /* A complex type can be initialized from one or two initializers,
5299 but braces are not elided. */
5301 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5303 if (CONSTRUCTOR_NELTS (init
) > 2)
5305 if (complain
& tf_error
)
5306 error ("too many initializers for %qT", type
);
5308 return error_mark_node
;
5311 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5313 VEC(constructor_elt
, gc
) *v
= 0;
5314 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5315 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5316 if (has_designator_problem (d
, complain
))
5317 return error_mark_node
;
5319 init
= build_constructor (init_list_type_node
, v
);
5324 /* A non-aggregate type is always initialized with a single
5326 if (!CP_AGGREGATE_TYPE_P (type
))
5328 /* It is invalid to initialize a non-aggregate type with a
5329 brace-enclosed initializer before C++0x.
5330 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5331 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5332 a CONSTRUCTOR (with a record type). */
5333 if (TREE_CODE (init
) == CONSTRUCTOR
5334 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5336 if (SCALAR_TYPE_P (type
))
5338 if (complain
& tf_error
)
5339 error ("braces around scalar initializer for type %qT", type
);
5340 init
= error_mark_node
;
5343 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5352 All implicit type conversions (clause _conv_) are considered when
5353 initializing the aggregate member with an initializer from an
5354 initializer-list. If the initializer can initialize a member,
5355 the member is initialized. Otherwise, if the member is itself a
5356 non-empty subaggregate, brace elision is assumed and the
5357 initializer is considered for the initialization of the first
5358 member of the subaggregate. */
5359 if (TREE_CODE (init
) != CONSTRUCTOR
5360 /* But don't try this for the first initializer, since that would be
5361 looking through the outermost braces; A a2 = { a1 }; is not a
5362 valid aggregate initialization. */
5363 && !first_initializer_p
5364 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5365 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5372 /* [dcl.init.string]
5374 A char array (whether plain char, signed char, or unsigned char)
5375 can be initialized by a string-literal (optionally enclosed in
5376 braces); a wchar_t array can be initialized by a wide
5377 string-literal (optionally enclosed in braces). */
5378 if (TREE_CODE (type
) == ARRAY_TYPE
5379 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5381 tree str_init
= init
;
5383 /* Strip one level of braces if and only if they enclose a single
5384 element (as allowed by [dcl.init.string]). */
5385 if (!first_initializer_p
5386 && TREE_CODE (str_init
) == CONSTRUCTOR
5387 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5389 str_init
= VEC_index (constructor_elt
,
5390 CONSTRUCTOR_ELTS (str_init
), 0).value
;
5393 /* If it's a string literal, then it's the initializer for the array
5394 as a whole. Otherwise, continue with normal initialization for
5395 array types (one value per array element). */
5396 if (TREE_CODE (str_init
) == STRING_CST
)
5398 if (has_designator_problem (d
, complain
))
5399 return error_mark_node
;
5405 /* The following cases are about aggregates. If we are not within a full
5406 initializer already, and there is not a CONSTRUCTOR, it means that there
5407 is a missing set of braces (that is, we are processing the case for
5408 which reshape_init exists). */
5409 if (!first_initializer_p
)
5411 if (TREE_CODE (init
) == CONSTRUCTOR
)
5413 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5414 /* There is no need to reshape pointer-to-member function
5415 initializers, as they are always constructed correctly
5416 by the front end. */
5418 else if (COMPOUND_LITERAL_P (init
))
5419 /* For a nested compound literal, there is no need to reshape since
5420 brace elision is not allowed. Even if we decided to allow it,
5421 we should add a call to reshape_init in finish_compound_literal,
5422 before calling digest_init, so changing this code would still
5423 not be necessary. */
5424 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5428 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5429 return reshape_init (type
, init
, complain
);
5433 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5437 /* Dispatch to specialized routines. */
5438 if (CLASS_TYPE_P (type
))
5439 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5440 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5441 return reshape_init_array (type
, d
, complain
);
5442 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5443 return reshape_init_vector (type
, d
, complain
);
5448 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5449 brace-enclosed aggregate initializer.
5451 INIT is the CONSTRUCTOR containing the list of initializers describing
5452 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5453 It may not presently match the shape of the TYPE; for example:
5455 struct S { int a; int b; };
5456 struct S a[] = { 1, 2, 3, 4 };
5458 Here INIT will hold a VEC of four elements, rather than a
5459 VEC of two elements, each itself a VEC of two elements. This
5460 routine transforms INIT from the former form into the latter. The
5461 revised CONSTRUCTOR node is returned. */
5464 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5466 VEC(constructor_elt
, gc
) *v
;
5470 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5472 v
= CONSTRUCTOR_ELTS (init
);
5474 /* An empty constructor does not need reshaping, and it is always a valid
5476 if (VEC_empty (constructor_elt
, v
))
5479 /* Recurse on this CONSTRUCTOR. */
5480 d
.cur
= &VEC_index (constructor_elt
, v
, 0);
5481 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5483 new_init
= reshape_init_r (type
, &d
, true, complain
);
5484 if (new_init
== error_mark_node
)
5485 return error_mark_node
;
5487 /* Make sure all the element of the constructor were used. Otherwise,
5488 issue an error about exceeding initializers. */
5491 if (complain
& tf_error
)
5492 error ("too many initializers for %qT", type
);
5494 return error_mark_node
;
5500 /* Verify array initializer. Returns true if errors have been reported. */
5503 check_array_initializer (tree decl
, tree type
, tree init
)
5505 tree element_type
= TREE_TYPE (type
);
5507 /* The array type itself need not be complete, because the
5508 initializer may tell us how many elements are in the array.
5509 But, the elements of the array must be complete. */
5510 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5513 error ("elements of array %q#D have incomplete type", decl
);
5515 error ("elements of array %q#T have incomplete type", type
);
5518 /* It is not valid to initialize a VLA. */
5520 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5521 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5524 error ("variable-sized object %qD may not be initialized", decl
);
5526 error ("variable-sized compound literal");
5532 /* Subroutine of check_initializer; args are passed down from that function.
5533 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5536 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5539 gcc_assert (stmts_are_full_exprs_p ());
5540 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5543 /* Verify INIT (the initializer for DECL), and record the
5544 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5545 grok_reference_init.
5547 If the return value is non-NULL, it is an expression that must be
5548 evaluated dynamically to initialize DECL. */
5551 check_initializer (tree decl
, tree init
, int flags
, VEC(tree
,gc
) **cleanups
)
5553 tree type
= TREE_TYPE (decl
);
5554 tree init_code
= NULL
;
5555 tree extra_init
= NULL_TREE
;
5558 /* Things that are going to be initialized need to have complete
5560 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5562 if (DECL_HAS_VALUE_EXPR_P (decl
))
5564 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5565 it doesn't have storage to be initialized. */
5566 gcc_assert (init
== NULL_TREE
);
5570 if (type
== error_mark_node
)
5571 /* We will have already complained. */
5574 if (TREE_CODE (type
) == ARRAY_TYPE
)
5576 if (check_array_initializer (decl
, type
, init
))
5579 else if (!COMPLETE_TYPE_P (type
))
5581 error ("%q#D has incomplete type", decl
);
5582 TREE_TYPE (decl
) = error_mark_node
;
5586 /* There is no way to make a variable-sized class type in GNU C++. */
5587 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5589 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5591 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5592 if (SCALAR_TYPE_P (type
))
5596 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5597 init
= build_zero_init (type
, NULL_TREE
, false);
5599 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5601 error ("scalar object %qD requires one element in initializer",
5603 TREE_TYPE (decl
) = error_mark_node
;
5609 if (TREE_CODE (decl
) == CONST_DECL
)
5611 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5613 DECL_INITIAL (decl
) = init
;
5615 gcc_assert (init
!= NULL_TREE
);
5618 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5620 else if (init
|| type_build_ctor_call (type
)
5621 || TREE_CODE (type
) == REFERENCE_TYPE
)
5623 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5625 init
= grok_reference_init (decl
, type
, init
, flags
);
5626 flags
|= LOOKUP_ALREADY_DIGESTED
;
5629 check_for_uninitialized_const_var (decl
);
5630 /* Do not reshape constructors of vectors (they don't need to be
5632 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5634 if (is_std_init_list (type
))
5636 init
= perform_implicit_conversion (type
, init
,
5637 tf_warning_or_error
);
5638 flags
|= LOOKUP_ALREADY_DIGESTED
;
5640 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5642 /* Don't reshape if the class has constructors. */
5643 if (cxx_dialect
== cxx98
)
5644 error ("in C++98 %qD must be initialized by constructor, "
5648 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5650 error ("opaque vector types cannot be initialized");
5651 init
= error_mark_node
;
5655 init
= reshape_init (type
, init
, tf_warning_or_error
);
5656 if (SCALAR_TYPE_P (type
))
5657 check_narrowing (type
, init
);
5661 /* If DECL has an array type without a specific bound, deduce the
5662 array size from the initializer. */
5663 maybe_deduce_size_from_array_init (decl
, init
);
5664 type
= TREE_TYPE (decl
);
5665 if (type
== error_mark_node
)
5668 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5669 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5670 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5671 && CP_AGGREGATE_TYPE_P (type
)))
5673 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5675 /* A constructor call is a non-trivial initializer even if
5676 it isn't explicitly written. */
5677 if (TREE_SIDE_EFFECTS (init_code
))
5678 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5680 /* If this is a constexpr initializer, expand_default_init will
5681 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5682 case, pull the initializer back out and pass it down into
5683 store_init_value. */
5684 while (TREE_CODE (init_code
) == EXPR_STMT
5685 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5686 init_code
= TREE_OPERAND (init_code
, 0);
5687 if (TREE_CODE (init_code
) == INIT_EXPR
)
5689 init
= TREE_OPERAND (init_code
, 1);
5690 init_code
= NULL_TREE
;
5691 /* Don't call digest_init; it's unnecessary and will complain
5692 about aggregate initialization of non-aggregate classes. */
5693 flags
|= LOOKUP_ALREADY_DIGESTED
;
5695 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5697 /* Declared constexpr, but no suitable initializer; massage
5698 init appropriately so we can pass it into store_init_value
5700 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5701 init
= finish_compound_literal (type
, init
,
5702 tf_warning_or_error
);
5703 else if (CLASS_TYPE_P (type
)
5704 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5706 init
= build_functional_cast (type
, init
, tf_none
);
5707 if (init
!= error_mark_node
)
5708 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5710 init_code
= NULL_TREE
;
5716 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5718 /* In aggregate initialization of a variable, each element
5719 initialization is a full-expression because there is no
5720 enclosing expression. */
5721 gcc_assert (stmts_are_full_exprs_p ());
5723 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5725 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5726 && DECL_INITIAL (decl
)
5727 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5728 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5729 warning (0, "array %qD initialized by parenthesized string literal %qE",
5730 decl
, DECL_INITIAL (decl
));
5736 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5737 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5738 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5739 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5742 check_for_uninitialized_const_var (decl
);
5745 if (init
&& init
!= error_mark_node
)
5746 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5749 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5751 if (init_code
&& DECL_IN_AGGR_P (decl
))
5753 static int explained
= 0;
5755 if (cxx_dialect
< cxx0x
)
5756 error ("initializer invalid for static member with constructor");
5758 error ("non-constant in-class initialization invalid for static "
5759 "member %qD", decl
);
5762 error ("(an out of class initialization is required)");
5770 /* If DECL is not a local variable, give it RTL. */
5773 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5775 int toplev
= toplevel_bindings_p ();
5777 const char *filename
;
5779 /* Set the DECL_ASSEMBLER_NAME for the object. */
5782 /* The `register' keyword, when used together with an
5783 asm-specification, indicates that the variable should be
5784 placed in a particular register. */
5785 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5787 set_user_assembler_name (decl
, asmspec
);
5788 DECL_HARD_REGISTER (decl
) = 1;
5792 if (TREE_CODE (decl
) == FUNCTION_DECL
5793 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5794 set_builtin_user_assembler_name (decl
, asmspec
);
5795 set_user_assembler_name (decl
, asmspec
);
5799 /* Handle non-variables up front. */
5800 if (TREE_CODE (decl
) != VAR_DECL
)
5802 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5806 /* If we see a class member here, it should be a static data
5808 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5810 gcc_assert (TREE_STATIC (decl
));
5811 /* An in-class declaration of a static data member should be
5812 external; it is only a declaration, and not a definition. */
5813 if (init
== NULL_TREE
)
5814 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5817 /* We don't create any RTL for local variables. */
5818 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5821 /* We defer emission of local statics until the corresponding
5822 DECL_EXPR is expanded. */
5823 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5825 /* We try to defer namespace-scope static constants so that they are
5826 not emitted into the object file unnecessarily. */
5827 filename
= input_filename
;
5828 if (!DECL_VIRTUAL_P (decl
)
5829 && TREE_READONLY (decl
)
5830 && DECL_INITIAL (decl
) != NULL_TREE
5831 && DECL_INITIAL (decl
) != error_mark_node
5833 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5835 && !TREE_PUBLIC (decl
))
5837 /* Fool with the linkage of static consts according to #pragma
5839 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5840 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5842 TREE_PUBLIC (decl
) = 1;
5843 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5848 /* Likewise for template instantiations. */
5849 else if (DECL_LANG_SPECIFIC (decl
)
5850 && DECL_IMPLICIT_INSTANTIATION (decl
))
5853 /* If we're not deferring, go ahead and assemble the variable. */
5855 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5858 /* walk_tree helper for wrap_temporary_cleanups, below. */
5861 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5863 /* Stop at types or full-expression boundaries. */
5864 if (TYPE_P (*stmt_p
)
5865 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5871 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5873 tree guard
= (tree
)data
;
5874 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5876 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5877 /* Tell honor_protect_cleanup_actions to handle this as a separate
5879 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5881 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5887 /* We're initializing a local variable which has a cleanup GUARD. If there
5888 are any temporaries used in the initializer INIT of this variable, we
5889 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5890 variable will be cleaned up properly if one of them throws.
5892 Unfortunately, there's no way to express this properly in terms of
5893 nesting, as the regions for the temporaries overlap the region for the
5894 variable itself; if there are two temporaries, the variable needs to be
5895 the first thing destroyed if either of them throws. However, we only
5896 want to run the variable's cleanup if it actually got constructed. So
5897 we need to guard the temporary cleanups with the variable's cleanup if
5898 they are run on the normal path, but not if they are run on the
5899 exceptional path. We implement this by telling
5900 honor_protect_cleanup_actions to strip the variable cleanup from the
5901 exceptional path. */
5904 wrap_temporary_cleanups (tree init
, tree guard
)
5906 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5909 /* Generate code to initialize DECL (a local variable). */
5912 initialize_local_var (tree decl
, tree init
)
5914 tree type
= TREE_TYPE (decl
);
5918 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5919 || TREE_CODE (decl
) == RESULT_DECL
);
5920 gcc_assert (!TREE_STATIC (decl
));
5922 if (DECL_SIZE (decl
) == NULL_TREE
)
5924 /* If we used it already as memory, it must stay in memory. */
5925 DECL_INITIAL (decl
) = NULL_TREE
;
5926 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5930 if (type
== error_mark_node
)
5933 /* Compute and store the initial value. */
5934 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5935 if (TREE_USED (type
))
5936 DECL_READ_P (decl
) = 1;
5938 /* Generate a cleanup, if necessary. */
5939 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5941 /* Perform the initialization. */
5944 if (TREE_CODE (init
) == INIT_EXPR
5945 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5947 /* Stick simple initializers in DECL_INITIAL so that
5948 -Wno-init-self works (c++/34772). */
5949 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5950 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5954 int saved_stmts_are_full_exprs_p
;
5956 /* If we're only initializing a single object, guard the
5957 destructors of any temporaries used in its initializer with
5958 its destructor. This isn't right for arrays because each
5959 element initialization is a full-expression. */
5960 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5961 wrap_temporary_cleanups (init
, cleanup
);
5963 gcc_assert (building_stmt_list_p ());
5964 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5965 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5966 finish_expr_stmt (init
);
5967 current_stmt_tree ()->stmts_are_full_exprs_p
=
5968 saved_stmts_are_full_exprs_p
;
5972 /* Set this to 0 so we can tell whether an aggregate which was
5973 initialized was ever used. Don't do this if it has a
5974 destructor, so we don't complain about the 'resource
5975 allocation is initialization' idiom. Now set
5976 attribute((unused)) on types so decls of that type will be
5977 marked used. (see TREE_USED, above.) */
5978 if (TYPE_NEEDS_CONSTRUCTING (type
)
5980 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5981 && DECL_NAME (decl
))
5982 TREE_USED (decl
) = 0;
5983 else if (already_used
)
5984 TREE_USED (decl
) = 1;
5987 finish_decl_cleanup (decl
, cleanup
);
5990 /* DECL is a VAR_DECL for a compiler-generated variable with static
5991 storage duration (like a virtual table) whose initializer is a
5992 compile-time constant. Initialize the variable and provide it to the
5996 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5999 gcc_assert (DECL_ARTIFICIAL (decl
));
6000 init
= build_constructor (TREE_TYPE (decl
), v
);
6001 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6002 DECL_INITIAL (decl
) = init
;
6003 DECL_INITIALIZED_P (decl
) = 1;
6004 determine_visibility (decl
);
6005 layout_var_decl (decl
);
6006 maybe_commonize_var (decl
);
6007 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6010 /* INIT is the initializer for a variable, as represented by the
6011 parser. Returns true iff INIT is type-dependent. */
6014 type_dependent_init_p (tree init
)
6016 if (TREE_CODE (init
) == TREE_LIST
)
6017 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6018 return any_type_dependent_elements_p (init
);
6019 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6020 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6022 VEC(constructor_elt
, gc
) *elts
;
6026 elts
= CONSTRUCTOR_ELTS (init
);
6027 nelts
= VEC_length (constructor_elt
, elts
);
6028 for (i
= 0; i
< nelts
; ++i
)
6029 if (type_dependent_init_p (VEC_index (constructor_elt
,
6034 /* It must be a simple expression, e.g., int i = 3; */
6035 return type_dependent_expression_p (init
);
6040 /* INIT is the initializer for a variable, as represented by the
6041 parser. Returns true iff INIT is value-dependent. */
6044 value_dependent_init_p (tree init
)
6046 if (TREE_CODE (init
) == TREE_LIST
)
6047 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6048 return any_value_dependent_elements_p (init
);
6049 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6050 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6052 VEC(constructor_elt
, gc
) *elts
;
6056 elts
= CONSTRUCTOR_ELTS (init
);
6057 nelts
= VEC_length (constructor_elt
, elts
);
6058 for (i
= 0; i
< nelts
; ++i
)
6059 if (value_dependent_init_p (VEC_index (constructor_elt
,
6064 /* It must be a simple expression, e.g., int i = 3; */
6065 return value_dependent_expression_p (init
);
6070 /* Finish processing of a declaration;
6071 install its line number and initial value.
6072 If the length of an array type is not known before,
6073 it must be determined now, from the initial value, or it is an error.
6075 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6076 true, then INIT is an integral constant expression.
6078 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6079 if the (init) syntax was used. */
6082 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6083 tree asmspec_tree
, int flags
)
6086 VEC(tree
,gc
) *cleanups
= NULL
;
6087 const char *asmspec
= NULL
;
6088 int was_readonly
= 0;
6089 bool var_definition_p
= false;
6092 if (decl
== error_mark_node
)
6097 error ("assignment (not initialization) in declaration");
6101 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6102 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6103 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6105 type
= TREE_TYPE (decl
);
6106 if (type
== error_mark_node
)
6109 /* If a name was specified, get the string. */
6110 if (at_namespace_scope_p ())
6111 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6112 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6113 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6115 if (current_class_type
6116 && CP_DECL_CONTEXT (decl
) == current_class_type
6117 && TYPE_BEING_DEFINED (current_class_type
)
6118 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6119 && (DECL_INITIAL (decl
) || init
))
6120 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6122 if (TREE_CODE (decl
) != FUNCTION_DECL
6123 && (auto_node
= type_uses_auto (type
)))
6126 if (init
== NULL_TREE
)
6128 error ("declaration of %q#D has no initializer", decl
);
6129 TREE_TYPE (decl
) = error_mark_node
;
6133 if (TREE_CODE (d_init
) == TREE_LIST
)
6134 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6135 tf_warning_or_error
);
6136 d_init
= resolve_nondeduced_context (d_init
);
6137 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6139 if (type
== error_mark_node
)
6143 if (!ensure_literal_type_for_constexpr_object (decl
))
6144 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6146 if (TREE_CODE (decl
) == VAR_DECL
6147 && DECL_CLASS_SCOPE_P (decl
)
6148 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6149 check_static_variable_definition (decl
, type
);
6151 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6154 if (init
== ridpointers
[(int)RID_DELETE
])
6156 /* FIXME check this is 1st decl. */
6157 DECL_DELETED_FN (decl
) = 1;
6158 DECL_DECLARED_INLINE_P (decl
) = 1;
6159 DECL_INITIAL (decl
) = error_mark_node
;
6160 FOR_EACH_CLONE (clone
, decl
)
6162 DECL_DELETED_FN (clone
) = 1;
6163 DECL_DECLARED_INLINE_P (clone
) = 1;
6164 DECL_INITIAL (clone
) = error_mark_node
;
6168 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6170 if (defaultable_fn_check (decl
))
6171 DECL_DEFAULTED_FN (decl
) = 1;
6173 DECL_INITIAL (decl
) = NULL_TREE
;
6177 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6179 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6180 /* If DECL is a reference, then we want to know whether init is a
6181 reference constant; init_const_expr_p as passed tells us whether
6182 it's an rvalue constant. */
6183 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6184 init_const_expr_p
= potential_constant_expression (init
);
6185 if (init_const_expr_p
)
6187 /* Set these flags now for templates. We'll update the flags in
6188 store_init_value for instantiations. */
6189 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6190 if (decl_maybe_constant_var_p (decl
))
6191 TREE_CONSTANT (decl
) = 1;
6195 if (processing_template_decl
)
6197 bool type_dependent_p
;
6199 /* Add this declaration to the statement-tree. */
6200 if (at_function_scope_p ())
6201 add_decl_expr (decl
);
6203 type_dependent_p
= dependent_type_p (type
);
6205 if (check_for_bare_parameter_packs (init
))
6208 DECL_INITIAL (decl
) = NULL_TREE
;
6211 /* Generally, initializers in templates are expanded when the
6212 template is instantiated. But, if DECL is a variable constant
6213 then it can be used in future constant expressions, so its value
6214 must be available. */
6216 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6217 /* We can't do anything if the decl has dependent type. */;
6219 && init_const_expr_p
6220 && !type_dependent_p
6221 && decl_maybe_constant_var_p (decl
)
6222 && !type_dependent_init_p (init
)
6223 && !value_dependent_init_p (init
))
6225 /* This variable seems to be a non-dependent constant, so process
6226 its initializer. If check_initializer returns non-null the
6227 initialization wasn't constant after all. */
6229 cleanups
= make_tree_vector ();
6230 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6231 if (init_code
== NULL_TREE
)
6233 release_tree_vector (cleanups
);
6235 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6237 /* Deduce array size even if the initializer is dependent. */
6238 maybe_deduce_size_from_array_init (decl
, init
);
6239 /* And complain about multiple initializers. */
6240 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6241 && !MAYBE_CLASS_TYPE_P (type
))
6242 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6243 tf_warning_or_error
);
6247 DECL_INITIAL (decl
) = init
;
6251 /* Just store non-static data member initializers for later. */
6252 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6253 DECL_INITIAL (decl
) = init
;
6255 /* Take care of TYPE_DECLs up front. */
6256 if (TREE_CODE (decl
) == TYPE_DECL
)
6258 if (type
!= error_mark_node
6259 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6261 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6262 warning (0, "shadowing previous type declaration of %q#D", decl
);
6263 set_identifier_type_value (DECL_NAME (decl
), decl
);
6266 /* If we have installed this as the canonical typedef for this
6267 type, and that type has not been defined yet, delay emitting
6268 the debug information for it, as we will emit it later. */
6269 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6270 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6271 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6273 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6278 /* A reference will be modified here, as it is initialized. */
6279 if (! DECL_EXTERNAL (decl
)
6280 && TREE_READONLY (decl
)
6281 && TREE_CODE (type
) == REFERENCE_TYPE
)
6284 TREE_READONLY (decl
) = 0;
6287 if (TREE_CODE (decl
) == VAR_DECL
)
6289 /* If this is a local variable that will need a mangled name,
6290 register it now. We must do this before processing the
6291 initializer for the variable, since the initialization might
6292 require a guard variable, and since the mangled name of the
6293 guard variable will depend on the mangled name of this
6295 if (DECL_FUNCTION_SCOPE_P (decl
)
6296 && TREE_STATIC (decl
)
6297 && !DECL_ARTIFICIAL (decl
))
6299 push_local_name (decl
);
6300 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6301 || DECL_DESTRUCTOR_P (current_function_decl
))
6302 /* Normally local_decls is populated during GIMPLE lowering,
6303 but [cd]tors are never actually compiled directly. We need
6304 to put statics on the list so we can deal with the label
6305 address extension. FIXME. */
6306 add_local_decl (cfun
, decl
);
6309 /* Convert the initializer to the type of DECL, if we have not
6310 already initialized DECL. */
6311 if (!DECL_INITIALIZED_P (decl
)
6312 /* If !DECL_EXTERNAL then DECL is being defined. In the
6313 case of a static data member initialized inside the
6314 class-specifier, there can be an initializer even if DECL
6315 is *not* defined. */
6316 && (!DECL_EXTERNAL (decl
) || init
))
6318 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6321 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6322 /* Allow libjava/prims.cc define primitive classes. */
6323 if (init
!= NULL_TREE
6324 || jclass
== NULL_TREE
6325 || TREE_CODE (jclass
) != TYPE_DECL
6326 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6327 || !same_type_ignoring_top_level_qualifiers_p
6328 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6329 error ("Java object %qD not allocated with %<new%>", decl
);
6332 cleanups
= make_tree_vector ();
6333 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6335 /* Check that the initializer for a static data member was a
6336 constant. Although we check in the parser that the
6337 initializer is an integral constant expression, we do not
6338 simplify division-by-zero at the point at which it
6339 occurs. Therefore, in:
6341 struct S { static const int i = 7 / 0; };
6343 we issue an error at this point. It would
6344 probably be better to forbid division by zero in
6345 integral constant expressions. */
6346 if (DECL_EXTERNAL (decl
) && init
)
6348 error ("%qD cannot be initialized by a non-constant expression"
6349 " when being declared", decl
);
6350 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6358 The memory occupied by any object of static storage
6359 duration is zero-initialized at program startup before
6360 any other initialization takes place.
6362 We cannot create an appropriate initializer until after
6363 the type of DECL is finalized. If DECL_INITIAL is set,
6364 then the DECL is statically initialized, and any
6365 necessary zero-initialization has already been performed. */
6366 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6367 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6368 /*nelts=*/NULL_TREE
,
6369 /*static_storage_p=*/true);
6370 /* Remember that the initialization for this variable has
6372 DECL_INITIALIZED_P (decl
) = 1;
6373 /* This declaration is the definition of this variable,
6374 unless we are initializing a static data member within
6375 the class specifier. */
6376 if (!DECL_EXTERNAL (decl
))
6377 var_definition_p
= true;
6379 /* If the variable has an array type, lay out the type, even if
6380 there is no initializer. It is valid to index through the
6381 array, and we must get TYPE_ALIGN set correctly on the array
6383 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6386 if (TREE_STATIC (decl
)
6387 && !at_function_scope_p ()
6388 && current_function_decl
== NULL
)
6389 /* So decl is a global variable or a static member of a
6390 non local class. Record the types it uses
6391 so that we can decide later to emit debug info for them. */
6392 record_types_used_by_current_var_decl (decl
);
6394 else if (TREE_CODE (decl
) == FIELD_DECL
6395 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6396 error ("non-static data member %qD has Java class type", decl
);
6398 /* Add this declaration to the statement-tree. This needs to happen
6399 after the call to check_initializer so that the DECL_EXPR for a
6400 reference temp is added before the DECL_EXPR for the reference itself. */
6401 if (DECL_FUNCTION_SCOPE_P (decl
))
6402 add_decl_expr (decl
);
6404 /* Let the middle end know about variables and functions -- but not
6405 static data members in uninstantiated class templates. */
6406 if (TREE_CODE (decl
) == VAR_DECL
6407 || TREE_CODE (decl
) == FUNCTION_DECL
)
6409 if (TREE_CODE (decl
) == VAR_DECL
)
6411 layout_var_decl (decl
);
6412 maybe_commonize_var (decl
);
6415 /* This needs to happen after the linkage is set. */
6416 determine_visibility (decl
);
6418 if (var_definition_p
&& TREE_STATIC (decl
))
6420 /* If a TREE_READONLY variable needs initialization
6421 at runtime, it is no longer readonly and we need to
6422 avoid MEM_READONLY_P being set on RTL created for it. */
6425 if (TREE_READONLY (decl
))
6426 TREE_READONLY (decl
) = 0;
6429 else if (was_readonly
)
6430 TREE_READONLY (decl
) = 1;
6433 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6435 /* Check for abstractness of the type. Notice that there is no
6436 need to strip array types here since the check for those types
6437 is already done within create_array_type_for_decl. */
6438 if (TREE_CODE (type
) == FUNCTION_TYPE
6439 || TREE_CODE (type
) == METHOD_TYPE
)
6440 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6442 abstract_virtuals_error (decl
, type
);
6444 if (TREE_TYPE (decl
) == error_mark_node
)
6445 /* No initialization required. */
6447 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6451 if (init
== ridpointers
[(int)RID_DEFAULT
])
6453 /* An out-of-class default definition is defined at
6454 the point where it is explicitly defaulted. */
6455 if (DECL_DELETED_FN (decl
))
6456 maybe_explain_implicit_delete (decl
);
6457 else if (DECL_INITIAL (decl
) == error_mark_node
)
6458 synthesize_method (decl
);
6461 error ("function %q#D is initialized like a variable", decl
);
6463 /* else no initialization required. */
6465 else if (DECL_EXTERNAL (decl
)
6466 && ! (DECL_LANG_SPECIFIC (decl
)
6467 && DECL_NOT_REALLY_EXTERN (decl
)))
6470 DECL_INITIAL (decl
) = init
;
6472 /* A variable definition. */
6473 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6474 /* Initialize the local variable. */
6475 initialize_local_var (decl
, init
);
6477 /* If a variable is defined, and then a subsequent
6478 definition with external linkage is encountered, we will
6479 get here twice for the same variable. We want to avoid
6480 calling expand_static_init more than once. For variables
6481 that are not static data members, we can call
6482 expand_static_init only when we actually process the
6483 initializer. It is not legal to redeclare a static data
6484 member, so this issue does not arise in that case. */
6485 else if (var_definition_p
&& TREE_STATIC (decl
))
6486 expand_static_init (decl
, init
);
6489 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6490 reference, insert it in the statement-tree now. */
6494 FOR_EACH_VEC_ELT (tree
, cleanups
, i
, t
)
6495 push_cleanup (decl
, t
, false);
6496 release_tree_vector (cleanups
);
6500 TREE_READONLY (decl
) = 1;
6502 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6505 /* Returns a declaration for a VAR_DECL as if:
6507 extern "C" TYPE NAME;
6509 had been seen. Used to create compiler-generated global
6513 declare_global_var (tree name
, tree type
)
6517 push_to_top_level ();
6518 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6519 TREE_PUBLIC (decl
) = 1;
6520 DECL_EXTERNAL (decl
) = 1;
6521 DECL_ARTIFICIAL (decl
) = 1;
6522 /* If the user has explicitly declared this variable (perhaps
6523 because the code we are compiling is part of a low-level runtime
6524 library), then it is possible that our declaration will be merged
6525 with theirs by pushdecl. */
6526 decl
= pushdecl (decl
);
6527 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6528 pop_from_top_level ();
6533 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6534 if "__cxa_atexit" is not being used) corresponding to the function
6535 to be called when the program exits. */
6538 get_atexit_fn_ptr_type (void)
6542 if (!atexit_fn_ptr_type_node
)
6545 if (flag_use_cxa_atexit
6546 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6547 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6548 arg_type
= ptr_type_node
;
6550 /* The parameter to "atexit" is "void (*)(void)". */
6551 arg_type
= NULL_TREE
;
6553 fn_type
= build_function_type_list (void_type_node
,
6554 arg_type
, NULL_TREE
);
6555 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6558 return atexit_fn_ptr_type_node
;
6561 /* Returns a pointer to the `atexit' function. Note that if
6562 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6563 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6566 get_atexit_node (void)
6572 bool use_aeabi_atexit
;
6577 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6579 /* The declaration for `__cxa_atexit' is:
6581 int __cxa_atexit (void (*)(void *), void *, void *)
6583 We build up the argument types and then the function type
6585 tree argtype0
, argtype1
, argtype2
;
6587 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6588 /* First, build the pointer-to-function type for the first
6590 fn_ptr_type
= get_atexit_fn_ptr_type ();
6591 /* Then, build the rest of the argument types. */
6592 argtype2
= ptr_type_node
;
6593 if (use_aeabi_atexit
)
6595 argtype1
= fn_ptr_type
;
6596 argtype0
= ptr_type_node
;
6600 argtype1
= ptr_type_node
;
6601 argtype0
= fn_ptr_type
;
6603 /* And the final __cxa_atexit type. */
6604 fn_type
= build_function_type_list (integer_type_node
,
6605 argtype0
, argtype1
, argtype2
,
6607 if (use_aeabi_atexit
)
6608 name
= "__aeabi_atexit";
6610 name
= "__cxa_atexit";
6614 /* The declaration for `atexit' is:
6616 int atexit (void (*)());
6618 We build up the argument types and then the function type
6620 fn_ptr_type
= get_atexit_fn_ptr_type ();
6621 /* Build the final atexit type. */
6622 fn_type
= build_function_type_list (integer_type_node
,
6623 fn_ptr_type
, NULL_TREE
);
6627 /* Now, build the function declaration. */
6628 push_lang_context (lang_name_c
);
6629 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6630 mark_used (atexit_fndecl
);
6631 pop_lang_context ();
6632 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6637 /* Like get_atexit_node, but for thread-local cleanups. */
6640 get_thread_atexit_node (void)
6642 /* The declaration for `__cxa_thread_atexit' is:
6644 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6645 tree fn_type
= build_function_type_list (integer_type_node
,
6646 get_atexit_fn_ptr_type (),
6647 ptr_type_node
, ptr_type_node
,
6650 /* Now, build the function declaration. */
6651 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
);
6652 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6655 /* Returns the __dso_handle VAR_DECL. */
6658 get_dso_handle_node (void)
6660 if (dso_handle_node
)
6661 return dso_handle_node
;
6663 /* Declare the variable. */
6664 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6667 #ifdef HAVE_GAS_HIDDEN
6668 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6669 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6672 return dso_handle_node
;
6675 /* Begin a new function with internal linkage whose job will be simply
6676 to destroy some particular variable. */
6678 static GTY(()) int start_cleanup_cnt
;
6681 start_cleanup_fn (void)
6686 bool use_cxa_atexit
= flag_use_cxa_atexit
6687 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6689 push_to_top_level ();
6691 /* No need to mangle this. */
6692 push_lang_context (lang_name_c
);
6694 /* Build the name of the function. */
6695 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6696 /* Build the function declaration. */
6697 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6698 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6699 /* It's a function with internal linkage, generated by the
6701 TREE_PUBLIC (fndecl
) = 0;
6702 DECL_ARTIFICIAL (fndecl
) = 1;
6703 /* Make the function `inline' so that it is only emitted if it is
6704 actually needed. It is unlikely that it will be inlined, since
6705 it is only called via a function pointer, but we avoid unnecessary
6706 emissions this way. */
6707 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6708 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6709 /* Build the parameter. */
6714 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6715 DECL_CONTEXT (parmdecl
) = fndecl
;
6716 TREE_USED (parmdecl
) = 1;
6717 DECL_READ_P (parmdecl
) = 1;
6718 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6722 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6724 pop_lang_context ();
6726 return current_function_decl
;
6729 /* Finish the cleanup function begun by start_cleanup_fn. */
6732 end_cleanup_fn (void)
6734 expand_or_defer_fn (finish_function (0));
6736 pop_from_top_level ();
6739 /* Generate code to handle the destruction of DECL, an object with
6740 static storage duration. */
6743 register_dtor_fn (tree decl
)
6750 bool ob_parm
, dso_parm
, use_dtor
;
6751 tree arg0
, arg1
, arg2
;
6754 type
= TREE_TYPE (decl
);
6755 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6756 return void_zero_node
;
6758 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6759 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6760 destructor to "__cxa_atexit"; we don't have to build a temporary
6761 function to do the cleanup. */
6762 ob_parm
= (DECL_THREAD_LOCAL_P (decl
)
6763 || (flag_use_cxa_atexit
6764 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()));
6766 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6771 /* Find the destructor. */
6772 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6773 gcc_assert (idx
>= 0);
6774 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6775 /* Make sure it is accessible. */
6776 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6777 tf_warning_or_error
);
6781 /* Call build_cleanup before we enter the anonymous function so
6782 that any access checks will be done relative to the current
6783 scope, rather than the scope of the anonymous function. */
6784 build_cleanup (decl
);
6786 /* Now start the function. */
6787 cleanup
= start_cleanup_fn ();
6789 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6790 to the original function, rather than the anonymous one. That
6791 will make the back end think that nested functions are in use,
6792 which causes confusion. */
6793 push_deferring_access_checks (dk_no_check
);
6794 fcall
= build_cleanup (decl
);
6795 pop_deferring_access_checks ();
6797 /* Create the body of the anonymous function. */
6798 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6799 finish_expr_stmt (fcall
);
6800 finish_compound_stmt (compound_stmt
);
6804 /* Call atexit with the cleanup function. */
6805 mark_used (cleanup
);
6806 cleanup
= build_address (cleanup
);
6808 if (DECL_THREAD_LOCAL_P (decl
))
6809 atex_node
= get_thread_atexit_node ();
6811 atex_node
= get_atexit_node ();
6815 /* We must convert CLEANUP to the type that "__cxa_atexit"
6817 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6818 /* "__cxa_atexit" will pass the address of DECL to the
6819 cleanup function. */
6821 addr
= build_address (decl
);
6822 /* The declared type of the parameter to "__cxa_atexit" is
6823 "void *". For plain "T*", we could just let the
6824 machinery in cp_build_function_call convert it -- but if the
6825 type is "cv-qualified T *", then we need to convert it
6826 before passing it in, to avoid spurious errors. */
6827 addr
= build_nop (ptr_type_node
, addr
);
6830 /* Since the cleanup functions we build ignore the address
6831 they're given, there's no reason to pass the actual address
6832 in, and, in general, it's cheaper to pass NULL than any
6834 addr
= null_pointer_node
;
6837 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6838 tf_warning_or_error
);
6844 if (!DECL_THREAD_LOCAL_P (decl
)
6845 && targetm
.cxx
.use_aeabi_atexit ())
6861 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6862 arg0
, arg1
, arg2
, NULL_TREE
);
6865 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6866 is its initializer. Generate code to handle the construction
6867 and destruction of DECL. */
6870 expand_static_init (tree decl
, tree init
)
6872 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6873 gcc_assert (TREE_STATIC (decl
));
6875 /* Some variables require no dynamic initialization. */
6877 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6880 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6881 && !DECL_FUNCTION_SCOPE_P (decl
))
6884 error ("non-local variable %qD declared %<__thread%> "
6885 "needs dynamic initialization", decl
);
6887 error ("non-local variable %qD declared %<__thread%> "
6888 "has a non-trivial destructor", decl
);
6889 static bool informed
;
6892 inform (DECL_SOURCE_LOCATION (decl
),
6893 "C++11 %<thread_local%> allows dynamic initialization "
6900 if (DECL_FUNCTION_SCOPE_P (decl
))
6902 /* Emit code to perform this initialization but once. */
6903 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6904 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6905 tree guard
, guard_addr
;
6907 /* We don't need thread-safety code for thread-local vars. */
6908 bool thread_guard
= (flag_threadsafe_statics
6909 && !DECL_THREAD_LOCAL_P (decl
));
6911 /* Emit code to perform this initialization but once. This code
6914 static <type> guard;
6915 if (!guard.first_byte) {
6916 if (__cxa_guard_acquire (&guard)) {
6919 // Do initialization.
6920 flag = true; __cxa_guard_release (&guard);
6921 // Register variable for destruction at end of program.
6923 if (!flag) __cxa_guard_abort (&guard);
6927 Note that the `flag' variable is only set to 1 *after* the
6928 initialization is complete. This ensures that an exception,
6929 thrown during the construction, will cause the variable to
6930 reinitialized when we pass through this code again, as per:
6934 If the initialization exits by throwing an exception, the
6935 initialization is not complete, so it will be tried again
6936 the next time control enters the declaration.
6938 This process should be thread-safe, too; multiple threads
6939 should not be able to initialize the variable more than
6942 /* Create the guard variable. */
6943 guard
= get_guard (decl
);
6945 /* This optimization isn't safe on targets with relaxed memory
6946 consistency. On such targets we force synchronization in
6947 __cxa_guard_acquire. */
6948 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6950 /* Begin the conditional initialization. */
6951 if_stmt
= begin_if_stmt ();
6952 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6953 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6958 tree vfntype
= NULL_TREE
;
6959 tree acquire_name
, release_name
, abort_name
;
6960 tree acquire_fn
, release_fn
, abort_fn
;
6961 guard_addr
= build_address (guard
);
6963 acquire_name
= get_identifier ("__cxa_guard_acquire");
6964 release_name
= get_identifier ("__cxa_guard_release");
6965 abort_name
= get_identifier ("__cxa_guard_abort");
6966 acquire_fn
= identifier_global_value (acquire_name
);
6967 release_fn
= identifier_global_value (release_name
);
6968 abort_fn
= identifier_global_value (abort_name
);
6970 acquire_fn
= push_library_fn
6971 (acquire_name
, build_function_type_list (integer_type_node
,
6972 TREE_TYPE (guard_addr
),
6975 if (!release_fn
|| !abort_fn
)
6976 vfntype
= build_function_type_list (void_type_node
,
6977 TREE_TYPE (guard_addr
),
6980 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6982 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6984 inner_if_stmt
= begin_if_stmt ();
6985 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6988 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6989 begin
= get_target_expr (boolean_false_node
);
6990 flag
= TARGET_EXPR_SLOT (begin
);
6992 TARGET_EXPR_CLEANUP (begin
)
6993 = build3 (COND_EXPR
, void_type_node
, flag
,
6995 build_call_n (abort_fn
, 1, guard_addr
));
6996 CLEANUP_EH_ONLY (begin
) = 1;
6998 /* Do the initialization itself. */
6999 init
= add_stmt_to_compound (begin
, init
);
7000 init
= add_stmt_to_compound
7001 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7002 init
= add_stmt_to_compound
7003 (init
, build_call_n (release_fn
, 1, guard_addr
));
7006 init
= add_stmt_to_compound (init
, set_guard (guard
));
7008 /* Use atexit to register a function for destroying this static
7010 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7012 finish_expr_stmt (init
);
7016 finish_compound_stmt (inner_then_clause
);
7017 finish_then_clause (inner_if_stmt
);
7018 finish_if_stmt (inner_if_stmt
);
7021 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7023 finish_compound_stmt (then_clause
);
7024 finish_then_clause (if_stmt
);
7025 finish_if_stmt (if_stmt
);
7028 else if (DECL_THREAD_LOCAL_P (decl
))
7029 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7031 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7035 /* Make TYPE a complete type based on INITIAL_VALUE.
7036 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7037 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7038 3 if the initializer list is empty (in pedantic mode). */
7041 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7044 tree type
, elt_type
;
7048 unsigned HOST_WIDE_INT i
;
7051 /* An array of character type can be initialized from a
7052 brace-enclosed string constant.
7054 FIXME: this code is duplicated from reshape_init. Probably
7055 we should just call reshape_init here? */
7056 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7057 && TREE_CODE (initial_value
) == CONSTRUCTOR
7058 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
7060 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
7061 tree value
= VEC_index (constructor_elt
, v
, 0).value
;
7063 if (TREE_CODE (value
) == STRING_CST
7064 && VEC_length (constructor_elt
, v
) == 1)
7065 initial_value
= value
;
7068 /* If any of the elements are parameter packs, we can't actually
7069 complete this type now because the array size is dependent. */
7070 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7072 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7075 if (PACK_EXPANSION_P (value
))
7081 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7083 /* We can create the array before the element type is complete, which
7084 means that we didn't have these two bits set in the original type
7085 either. In completing the type, we are expected to propagate these
7086 bits. See also complete_type which does the same thing for arrays
7089 if (TYPE_DOMAIN (type
))
7091 elt_type
= TREE_TYPE (type
);
7092 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7093 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7094 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7100 /* As above, but either give an error or reject zero-size arrays, depending
7104 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7105 bool do_default
, tsubst_flags_t complain
)
7108 bool sfinae
= !(complain
& tf_error
);
7109 /* In SFINAE context we can't be lenient about zero-size arrays. */
7112 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7118 /* Not an error. */;
7119 else if (failure
== 1)
7120 error ("initializer fails to determine size of %qT", *ptype
);
7121 else if (failure
== 2)
7124 error ("array size missing in %qT", *ptype
);
7126 else if (failure
== 3)
7127 error ("zero-size array %qT", *ptype
);
7128 *ptype
= error_mark_node
;
7133 /* Return zero if something is declared to be a member of type
7134 CTYPE when in the context of CUR_TYPE. STRING is the error
7135 message to print in that case. Otherwise, quietly return 1. */
7138 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7140 if (ctype
&& ctype
!= cur_type
)
7142 if (flags
== DTOR_FLAG
)
7143 error ("destructor for alien class %qT cannot be a member", ctype
);
7145 error ("constructor for alien class %qT cannot be a member", ctype
);
7151 /* Subroutine of `grokdeclarator'. */
7153 /* Generate errors possibly applicable for a given set of specifiers.
7154 This is for ARM $7.1.2. */
7157 bad_specifiers (tree object
,
7158 enum bad_spec_place type
,
7169 error ("%qD declared as a %<virtual%> variable", object
);
7171 error ("%qD declared as an %<inline%> variable", object
);
7173 error ("%<const%> and %<volatile%> function specifiers on "
7174 "%qD invalid in variable declaration", object
);
7178 error ("%qD declared as a %<virtual%> parameter", object
);
7180 error ("%qD declared as an %<inline%> parameter", object
);
7182 error ("%<const%> and %<volatile%> function specifiers on "
7183 "%qD invalid in parameter declaration", object
);
7187 error ("%qD declared as a %<virtual%> type", object
);
7189 error ("%qD declared as an %<inline%> type", object
);
7191 error ("%<const%> and %<volatile%> function specifiers on "
7192 "%qD invalid in type declaration", object
);
7196 error ("%qD declared as a %<virtual%> field", object
);
7198 error ("%qD declared as an %<inline%> field", object
);
7200 error ("%<const%> and %<volatile%> function specifiers on "
7201 "%qD invalid in field declaration", object
);
7207 error ("%q+D declared as a friend", object
);
7209 && (TREE_CODE (object
) == TYPE_DECL
7210 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7211 && !TYPE_REFFN_P (TREE_TYPE (object
))
7212 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7213 error ("%q+D declared with an exception specification", object
);
7216 /* DECL is a member function or static data member and is presently
7217 being defined. Check that the definition is taking place in a
7221 check_class_member_definition_namespace (tree decl
)
7223 /* These checks only apply to member functions and static data
7225 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7226 || TREE_CODE (decl
) == VAR_DECL
);
7227 /* We check for problems with specializations in pt.c in
7228 check_specialization_namespace, where we can issue better
7230 if (processing_specialization
)
7232 /* There are no restrictions on the placement of
7233 explicit instantiations. */
7234 if (processing_explicit_instantiation
)
7238 A member function definition that appears outside of the
7239 class definition shall appear in a namespace scope enclosing
7240 the class definition.
7244 The definition for a static data member shall appear in a
7245 namespace scope enclosing the member's class definition. */
7246 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7247 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7248 decl
, DECL_CONTEXT (decl
));
7251 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7252 METHOD_TYPE for a non-static member function; QUALS are the
7253 cv-qualifiers that apply to the function. */
7256 build_this_parm (tree type
, cp_cv_quals quals
)
7261 cp_cv_quals this_quals
;
7263 if (CLASS_TYPE_P (type
))
7266 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7267 this_type
= build_pointer_type (this_type
);
7270 this_type
= type_of_this_parm (type
);
7271 /* The `this' parameter is implicitly `const'; it cannot be
7273 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7274 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7275 parm
= build_artificial_parm (this_identifier
, qual_type
);
7276 cp_apply_type_quals_to_decl (this_quals
, parm
);
7280 /* DECL is a static member function. Complain if it was declared
7281 with function-cv-quals. */
7284 check_static_quals (tree decl
, cp_cv_quals quals
)
7286 if (quals
!= TYPE_UNQUALIFIED
)
7287 error ("static member function %q#D declared with type qualifiers",
7291 /* CTYPE is class type, or null if non-class.
7292 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7294 DECLARATOR is the function's name.
7295 PARMS is a chain of PARM_DECLs for the function.
7296 VIRTUALP is truthvalue of whether the function is virtual or not.
7297 FLAGS are to be passed through to `grokclassfn'.
7298 QUALS are qualifiers indicating whether the function is `const'
7300 RAISES is a list of exceptions that this function can raise.
7301 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7302 not look, and -1 if we should not call `grokclassfn' at all.
7304 SFK is the kind of special function (if any) for the new function.
7306 Returns `NULL_TREE' if something goes wrong, after issuing
7307 applicable error messages. */
7310 grokfndecl (tree ctype
,
7314 tree orig_declarator
,
7316 enum overload_flags flags
,
7323 special_function_kind sfk
,
7328 location_t location
)
7331 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7335 type
= build_exception_variant (type
, raises
);
7337 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7339 /* If we have an explicit location, use it, otherwise use whatever
7340 build_lang_decl used (probably input_location). */
7341 if (location
!= UNKNOWN_LOCATION
)
7342 DECL_SOURCE_LOCATION (decl
) = location
;
7344 if (TREE_CODE (type
) == METHOD_TYPE
)
7347 parm
= build_this_parm (type
, quals
);
7348 DECL_CHAIN (parm
) = parms
;
7351 DECL_ARGUMENTS (decl
) = parms
;
7352 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7353 DECL_CONTEXT (t
) = decl
;
7354 /* Propagate volatile out from type to decl. */
7355 if (TYPE_VOLATILE (type
))
7356 TREE_THIS_VOLATILE (decl
) = 1;
7358 /* Setup decl according to sfk. */
7361 case sfk_constructor
:
7362 case sfk_copy_constructor
:
7363 case sfk_move_constructor
:
7364 DECL_CONSTRUCTOR_P (decl
) = 1;
7366 case sfk_destructor
:
7367 DECL_DESTRUCTOR_P (decl
) = 1;
7373 /* If pointers to member functions use the least significant bit to
7374 indicate whether a function is virtual, ensure a pointer
7375 to this function will have that bit clear. */
7376 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7377 && TREE_CODE (type
) == METHOD_TYPE
7378 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7379 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7382 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7386 ("defining explicit specialization %qD in friend declaration",
7390 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7391 tree args
= TREE_OPERAND (orig_declarator
, 1);
7393 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7395 /* Something like `template <class T> friend void f<T>()'. */
7396 error ("invalid use of template-id %qD in declaration "
7397 "of primary template",
7403 /* A friend declaration of the form friend void f<>(). Record
7404 the information in the TEMPLATE_ID_EXPR. */
7405 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7407 if (TREE_CODE (fns
) == COMPONENT_REF
)
7409 /* Due to bison parser ickiness, we will have already looked
7410 up an operator_name or PFUNCNAME within the current class
7411 (see template_id in parse.y). If the current class contains
7412 such a name, we'll get a COMPONENT_REF here. Undo that. */
7414 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7415 == current_class_type
);
7416 fns
= TREE_OPERAND (fns
, 1);
7418 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7419 || TREE_CODE (fns
) == OVERLOAD
);
7420 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7422 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7423 if (TREE_PURPOSE (t
)
7424 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7426 error ("default arguments are not allowed in declaration "
7427 "of friend template specialization %qD",
7434 error ("%<inline%> is not allowed in declaration of friend "
7435 "template specialization %qD",
7442 /* If this decl has namespace scope, set that up. */
7444 set_decl_namespace (decl
, in_namespace
, friendp
);
7446 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7448 /* `main' and builtins have implicit 'C' linkage. */
7449 if ((MAIN_NAME_P (declarator
)
7450 || (IDENTIFIER_LENGTH (declarator
) > 10
7451 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7452 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7453 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7454 && current_lang_name
== lang_name_cplusplus
7455 && ctype
== NULL_TREE
7456 && DECL_FILE_SCOPE_P (decl
))
7457 SET_DECL_LANGUAGE (decl
, lang_c
);
7459 /* Should probably propagate const out from type to decl I bet (mrs). */
7462 DECL_STATIC_FUNCTION_P (decl
) = 1;
7463 DECL_CONTEXT (decl
) = ctype
;
7468 DECL_CONTEXT (decl
) = ctype
;
7470 check_class_member_definition_namespace (decl
);
7473 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7475 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7476 error ("cannot declare %<::main%> to be a template");
7478 error ("cannot declare %<::main%> to be inline");
7480 error ("cannot declare %<::main%> to be static");
7485 /* Members of anonymous types and local classes have no linkage; make
7486 them internal. If a typedef is made later, this will be changed. */
7487 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7488 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7491 if (publicp
&& cxx_dialect
== cxx98
)
7493 /* [basic.link]: A name with no linkage (notably, the name of a class
7494 or enumeration declared in a local scope) shall not be used to
7495 declare an entity with linkage.
7497 DR 757 relaxes this restriction for C++0x. */
7498 t
= no_linkage_check (TREE_TYPE (decl
),
7499 /*relaxed_p=*/false);
7502 if (TYPE_ANONYMOUS_P (t
))
7504 if (DECL_EXTERN_C_P (decl
))
7505 /* Allow this; it's pretty common in C. */;
7508 permerror (input_location
, "anonymous type with no linkage "
7509 "used to declare function %q#D with linkage",
7511 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7512 permerror (input_location
, "%q+#D does not refer to the unqualified "
7513 "type, so it is not used for linkage",
7518 permerror (input_location
, "type %qT with no linkage used to "
7519 "declare function %q#D with linkage", t
, decl
);
7523 TREE_PUBLIC (decl
) = publicp
;
7526 DECL_INTERFACE_KNOWN (decl
) = 1;
7527 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7530 /* If the declaration was declared inline, mark it as such. */
7532 DECL_DECLARED_INLINE_P (decl
) = 1;
7534 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7536 DECL_EXTERNAL (decl
) = 1;
7537 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7540 ? G_("static member function %qD cannot have cv-qualifier")
7541 : G_("non-member function %qD cannot have cv-qualifier"),
7543 quals
= TYPE_UNQUALIFIED
;
7546 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7547 && !grok_op_properties (decl
, /*complain=*/true))
7549 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7551 bool long_long_unsigned_p
;
7553 const char *suffix
= NULL
;
7554 /* [over.literal]/6: Literal operators shall not have C linkage. */
7555 if (DECL_LANGUAGE (decl
) == lang_c
)
7557 error ("literal operator with C linkage");
7561 if (DECL_NAMESPACE_SCOPE_P (decl
))
7563 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7566 error ("%qD has invalid argument list", decl
);
7570 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7571 if (long_long_unsigned_p
)
7573 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7574 warning (0, "integer suffix %<%s%>"
7575 " shadowed by implementation", suffix
);
7577 else if (long_double_p
)
7579 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7580 warning (0, "floating point suffix %<%s%>"
7581 " shadowed by implementation", suffix
);
7586 error ("%qD must be a non-member function", decl
);
7592 /* Make the init_value nonzero so pushdecl knows this is not
7593 tentative. error_mark_node is replaced later with the BLOCK. */
7594 DECL_INITIAL (decl
) = error_mark_node
;
7596 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7597 TREE_NOTHROW (decl
) = 1;
7599 /* Caller will do the rest of this. */
7603 if (ctype
!= NULL_TREE
)
7604 grokclassfn (ctype
, decl
, flags
);
7607 if (cxx_dialect
>= cxx0x
7608 && DECL_DESTRUCTOR_P (decl
)
7609 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7610 && !processing_template_decl
)
7611 deduce_noexcept_on_destructor (decl
);
7613 decl
= check_explicit_specialization (orig_declarator
, decl
,
7616 4 * (friendp
!= 0));
7617 if (decl
== error_mark_node
)
7620 if (DECL_STATIC_FUNCTION_P (decl
))
7621 check_static_quals (decl
, quals
);
7625 cplus_decl_attributes (&decl
, *attrlist
, 0);
7626 *attrlist
= NULL_TREE
;
7629 /* Check main's type after attributes have been applied. */
7630 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7632 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7635 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7637 error ("%<::main%> must return %<int%>");
7638 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7639 TREE_TYPE (decl
) = newtype
;
7642 check_main_parameter_types (decl
);
7645 if (ctype
!= NULL_TREE
7646 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7649 tree old_decl
= check_classfn (ctype
, decl
,
7650 (processing_template_decl
7651 > template_class_depth (ctype
))
7652 ? current_template_parms
7655 if (old_decl
== error_mark_node
)
7663 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7664 /* Because grokfndecl is always supposed to return a
7665 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7666 here. We depend on our callers to figure out that its
7667 really a template that's being returned. */
7668 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7670 if (DECL_STATIC_FUNCTION_P (old_decl
)
7671 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7673 /* Remove the `this' parm added by grokclassfn. */
7674 revert_static_member_fn (decl
);
7675 check_static_quals (decl
, quals
);
7677 if (DECL_ARTIFICIAL (old_decl
))
7679 error ("definition of implicitly-declared %qD", old_decl
);
7682 else if (DECL_DEFAULTED_FN (old_decl
))
7684 error ("definition of explicitly-defaulted %q+D", decl
);
7685 error ("%q+#D explicitly defaulted here", old_decl
);
7689 /* Since we've smashed OLD_DECL to its
7690 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7691 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7692 decl
= DECL_TEMPLATE_RESULT (decl
);
7694 /* Attempt to merge the declarations. This can fail, in
7695 the case of some invalid specialization declarations. */
7696 pushed_scope
= push_scope (ctype
);
7697 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7699 pop_scope (pushed_scope
);
7702 error ("no %q#D member function declared in class %qT",
7710 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7713 if (ctype
== NULL_TREE
|| check
)
7717 DECL_VIRTUAL_P (decl
) = 1;
7722 /* decl is a FUNCTION_DECL.
7723 specifiers are the parsed virt-specifiers.
7725 Set flags to reflect the virt-specifiers.
7730 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7732 if (decl
== NULL_TREE
)
7734 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7735 DECL_OVERRIDE_P (decl
) = 1;
7736 if (specifiers
& VIRT_SPEC_FINAL
)
7737 DECL_FINAL_P (decl
) = 1;
7741 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7742 the linkage that DECL will receive in the object file. */
7745 set_linkage_for_static_data_member (tree decl
)
7747 /* A static data member always has static storage duration and
7748 external linkage. Note that static data members are forbidden in
7749 local classes -- the only situation in which a class has
7750 non-external linkage. */
7751 TREE_PUBLIC (decl
) = 1;
7752 TREE_STATIC (decl
) = 1;
7753 /* For non-template classes, static data members are always put
7754 out in exactly those files where they are defined, just as
7755 with ordinary namespace-scope variables. */
7756 if (!processing_template_decl
)
7757 DECL_INTERFACE_KNOWN (decl
) = 1;
7760 /* Create a VAR_DECL named NAME with the indicated TYPE.
7762 If SCOPE is non-NULL, it is the class type or namespace containing
7763 the variable. If SCOPE is NULL, the variable should is created in
7764 the innermost enclosings scope. */
7767 grokvardecl (tree type
,
7769 const cp_decl_specifier_seq
*declspecs
,
7775 tree explicit_scope
;
7777 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7779 /* Compute the scope in which to place the variable, but remember
7780 whether or not that scope was explicitly specified by the user. */
7781 explicit_scope
= scope
;
7784 /* An explicit "extern" specifier indicates a namespace-scope
7786 if (declspecs
->storage_class
== sc_extern
)
7787 scope
= current_decl_namespace ();
7788 else if (!at_function_scope_p ())
7789 scope
= current_scope ();
7793 && (/* If the variable is a namespace-scope variable declared in a
7794 template, we need DECL_LANG_SPECIFIC. */
7795 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7796 /* Similarly for namespace-scope variables with language linkage
7798 || (TREE_CODE (scope
) == NAMESPACE_DECL
7799 && current_lang_name
!= lang_name_cplusplus
)
7800 /* Similarly for static data members. */
7802 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7804 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7806 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7807 set_decl_namespace (decl
, explicit_scope
, 0);
7809 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7811 if (declspecs
->storage_class
== sc_extern
)
7813 DECL_THIS_EXTERN (decl
) = 1;
7814 DECL_EXTERNAL (decl
) = !initialized
;
7817 if (DECL_CLASS_SCOPE_P (decl
))
7819 set_linkage_for_static_data_member (decl
);
7820 /* This function is only called with out-of-class definitions. */
7821 DECL_EXTERNAL (decl
) = 0;
7822 check_class_member_definition_namespace (decl
);
7824 /* At top level, either `static' or no s.c. makes a definition
7825 (perhaps tentative), and absence of `static' makes it public. */
7826 else if (toplevel_bindings_p ())
7828 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7829 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7830 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7832 /* Not at top level, only `static' makes a static definition. */
7835 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7836 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7839 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7841 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7842 if (declspecs
->gnu_thread_keyword_p
)
7843 DECL_GNU_TLS_P (decl
) = true;
7846 /* If the type of the decl has no linkage, make sure that we'll
7847 notice that in mark_used. */
7848 if (cxx_dialect
> cxx98
7849 && decl_linkage (decl
) != lk_none
7850 && DECL_LANG_SPECIFIC (decl
) == NULL
7851 && !DECL_EXTERN_C_P (decl
)
7852 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7853 retrofit_lang_decl (decl
);
7855 if (TREE_PUBLIC (decl
))
7857 /* [basic.link]: A name with no linkage (notably, the name of a class
7858 or enumeration declared in a local scope) shall not be used to
7859 declare an entity with linkage.
7861 DR 757 relaxes this restriction for C++0x. */
7862 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7863 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7866 if (TYPE_ANONYMOUS_P (t
))
7868 if (DECL_EXTERN_C_P (decl
))
7869 /* Allow this; it's pretty common in C. */
7873 /* DRs 132, 319 and 389 seem to indicate types with
7874 no linkage can only be used to declare extern "C"
7875 entities. Since it's not always an error in the
7876 ISO C++ 90 Standard, we only issue a warning. */
7877 warning (0, "anonymous type with no linkage used to declare "
7878 "variable %q#D with linkage", decl
);
7879 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7880 warning (0, "%q+#D does not refer to the unqualified "
7881 "type, so it is not used for linkage",
7886 warning (0, "type %qT with no linkage used to declare variable "
7887 "%q#D with linkage", t
, decl
);
7891 DECL_INTERFACE_KNOWN (decl
) = 1;
7896 /* Create and return a canonical pointer to member function type, for
7897 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7900 build_ptrmemfunc_type (tree type
)
7904 tree unqualified_variant
= NULL_TREE
;
7906 if (type
== error_mark_node
)
7909 /* If a canonical type already exists for this type, use it. We use
7910 this method instead of type_hash_canon, because it only does a
7911 simple equality check on the list of field members. */
7913 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7916 /* Make sure that we always have the unqualified pointer-to-member
7918 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7920 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7922 t
= make_class_type (RECORD_TYPE
);
7923 xref_basetypes (t
, NULL_TREE
);
7925 /* Let the front end know this is a pointer to member function... */
7926 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7927 /* ... and not really a class type. */
7928 SET_CLASS_TYPE_P (t
, 0);
7930 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7933 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7935 DECL_CHAIN (field
) = fields
;
7938 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7940 /* Zap out the name so that the back end will give us the debugging
7941 information for this anonymous RECORD_TYPE. */
7942 TYPE_NAME (t
) = NULL_TREE
;
7944 /* If this is not the unqualified form of this pointer-to-member
7945 type, set the TYPE_MAIN_VARIANT for this type to be the
7946 unqualified type. Since they are actually RECORD_TYPEs that are
7947 not variants of each other, we must do this manually.
7948 As we just built a new type there is no need to do yet another copy. */
7949 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7951 int type_quals
= cp_type_quals (type
);
7952 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7953 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7954 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7955 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7956 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7957 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7958 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7961 /* Cache this pointer-to-member type so that we can find it again
7963 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7965 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7966 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7967 else if (TYPE_CANONICAL (type
) != type
)
7968 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7973 /* Create and return a pointer to data member type. */
7976 build_ptrmem_type (tree class_type
, tree member_type
)
7978 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7980 cp_cv_quals quals
= type_memfn_quals (member_type
);
7981 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7982 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7986 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7987 return build_offset_type (class_type
, member_type
);
7991 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7992 Check to see that the definition is valid. Issue appropriate error
7993 messages. Return 1 if the definition is particularly bad, or 0
7997 check_static_variable_definition (tree decl
, tree type
)
7999 /* Can't check yet if we don't know the type. */
8000 if (dependent_type_p (type
))
8002 /* If DECL is declared constexpr, we'll do the appropriate checks
8003 in check_initializer. */
8004 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8006 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8008 if (!COMPLETE_TYPE_P (type
))
8009 error ("in-class initialization of static data member %q#D of "
8010 "incomplete type", decl
);
8011 else if (literal_type_p (type
))
8012 permerror (input_location
,
8013 "%<constexpr%> needed for in-class initialization of "
8014 "static data member %q#D of non-integral type", decl
);
8016 error ("in-class initialization of static data member %q#D of "
8017 "non-literal type", decl
);
8021 /* Motion 10 at San Diego: If a static const integral data member is
8022 initialized with an integral constant expression, the initializer
8023 may appear either in the declaration (within the class), or in
8024 the definition, but not both. If it appears in the class, the
8025 member is a member constant. The file-scope definition is always
8027 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8029 error ("invalid in-class initialization of static data member "
8030 "of non-integral type %qT",
8034 else if (!CP_TYPE_CONST_P (type
))
8035 error ("ISO C++ forbids in-class initialization of non-const "
8036 "static member %qD",
8038 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8039 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8040 "%qD of non-integral type %qT", decl
, type
);
8045 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8046 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8047 expressions out into temporary variables so that walk_tree doesn't
8048 step into them (c++/15764). */
8051 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8053 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8054 tree expr
= *expr_p
;
8055 if (TREE_CODE (expr
) == SAVE_EXPR
)
8057 tree op
= TREE_OPERAND (expr
, 0);
8058 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8059 if (TREE_SIDE_EFFECTS (op
))
8060 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8063 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8068 /* Entry point for the above. */
8071 stabilize_vla_size (tree size
)
8073 struct pointer_set_t
*pset
= pointer_set_create ();
8074 /* Break out any function calls into temporary variables. */
8075 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8076 pointer_set_destroy (pset
);
8079 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8080 not inside of SAVE_EXPR and fold them. */
8083 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8085 tree expr
= *expr_p
;
8086 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8088 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8090 *(bool *)data
= true;
8091 if (SIZEOF_EXPR_TYPE_P (expr
))
8092 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8093 SIZEOF_EXPR
, false);
8094 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8095 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8098 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8100 if (expr
== error_mark_node
)
8101 expr
= size_one_node
;
8108 /* Given the SIZE (i.e., number of elements) in an array, compute an
8109 appropriate index type for the array. If non-NULL, NAME is the
8110 name of the thing being declared. */
8113 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8117 tree abi_1_itype
= NULL_TREE
;
8119 if (error_operand_p (size
))
8120 return error_mark_node
;
8122 if (!type_dependent_expression_p (size
))
8124 tree type
= TREE_TYPE (size
);
8126 mark_rvalue_use (size
);
8128 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
8129 && TREE_SIDE_EFFECTS (size
))
8130 /* In C++98, we mark a non-constant array bound with a magic
8131 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8134 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8136 if (CLASS_TYPE_P (type
)
8137 && CLASSTYPE_LITERAL_P (type
))
8139 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8142 if (!(complain
& tf_error
))
8143 return error_mark_node
;
8145 error ("size of array %qD has non-integral type %qT",
8148 error ("size of array has non-integral type %qT", type
);
8149 size
= integer_one_node
;
8151 if (size
== error_mark_node
)
8152 return error_mark_node
;
8153 type
= TREE_TYPE (size
);
8154 /* We didn't support this case in GCC 3.2, so don't bother
8155 trying to model it now in ABI v1. */
8156 abi_1_itype
= error_mark_node
;
8159 size
= maybe_constant_value (size
);
8160 if (!TREE_CONSTANT (size
))
8164 if (error_operand_p (size
))
8165 return error_mark_node
;
8167 /* The array bound must be an integer type. */
8168 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8170 if (!(complain
& tf_error
))
8171 return error_mark_node
;
8173 error ("size of array %qD has non-integral type %qT", name
, type
);
8175 error ("size of array has non-integral type %qT", type
);
8176 size
= integer_one_node
;
8177 type
= TREE_TYPE (size
);
8181 /* A type is dependent if it is...an array type constructed from any
8182 dependent type or whose size is specified by a constant expression
8183 that is value-dependent. */
8184 /* We can only call value_dependent_expression_p on integral constant
8185 expressions; treat non-constant expressions as dependent, too. */
8186 if (processing_template_decl
8187 && (type_dependent_expression_p (size
)
8188 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8190 /* We cannot do any checking for a SIZE that isn't known to be
8191 constant. Just build the index type and mark that it requires
8192 structural equality checks. */
8193 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8194 size
, integer_one_node
));
8195 TYPE_DEPENDENT_P (itype
) = 1;
8196 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8197 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8201 if (!abi_version_at_least (2) && processing_template_decl
8202 && abi_1_itype
== NULL_TREE
)
8203 /* For abi-1, we handled all instances in templates the same way,
8204 even when they were non-dependent. This affects the manglings
8205 produced. So, we do the normal checking for non-dependent
8206 sizes, but at the end we'll return the same type that abi-1
8207 would have, but with TYPE_CANONICAL set to the "right"
8208 value that the current ABI would provide. */
8209 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8210 osize
, integer_one_node
));
8212 /* Normally, the array-bound will be a constant. */
8213 if (TREE_CODE (size
) == INTEGER_CST
)
8215 /* Check to see if the array bound overflowed. Make that an
8216 error, no matter how generous we're being. */
8217 constant_expression_error (size
);
8219 /* An array must have a positive number of elements. */
8220 if (INT_CST_LT (size
, integer_zero_node
))
8222 if (!(complain
& tf_error
))
8223 return error_mark_node
;
8225 error ("size of array %qD is negative", name
);
8227 error ("size of array is negative");
8228 size
= integer_one_node
;
8230 /* As an extension we allow zero-sized arrays. */
8231 else if (integer_zerop (size
))
8233 if (!(complain
& tf_error
))
8234 /* We must fail if performing argument deduction (as
8235 indicated by the state of complain), so that
8236 another substitution can be found. */
8237 return error_mark_node
;
8238 else if (in_system_header
)
8239 /* Allow them in system headers because glibc uses them. */;
8241 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8243 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8246 else if (TREE_CONSTANT (size
)
8247 /* We don't allow VLAs at non-function scopes, or during
8248 tentative template substitution. */
8249 || !at_function_scope_p () || !(complain
& tf_error
))
8251 if (!(complain
& tf_error
))
8252 return error_mark_node
;
8253 /* `(int) &fn' is not a valid array bound. */
8255 error ("size of array %qD is not an integral constant-expression",
8258 error ("size of array is not an integral constant-expression");
8259 size
= integer_one_node
;
8261 else if (pedantic
&& warn_vla
!= 0)
8264 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8266 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8268 else if (warn_vla
> 0)
8272 "variable length array %qD is used", name
);
8275 "variable length array is used");
8278 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8279 /* A variable sized array. */
8280 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8283 HOST_WIDE_INT saved_processing_template_decl
;
8285 /* Compute the index of the largest element in the array. It is
8286 one less than the number of elements in the array. We save
8287 and restore PROCESSING_TEMPLATE_DECL so that computations in
8288 cp_build_binary_op will be appropriately folded. */
8289 saved_processing_template_decl
= processing_template_decl
;
8290 processing_template_decl
= 0;
8291 itype
= cp_build_binary_op (input_location
,
8293 cp_convert (ssizetype
, size
, complain
),
8294 cp_convert (ssizetype
, integer_one_node
,
8297 itype
= fold (itype
);
8298 processing_template_decl
= saved_processing_template_decl
;
8300 if (!TREE_CONSTANT (itype
))
8302 /* A variable sized array. */
8303 itype
= variable_size (itype
);
8304 if (TREE_CODE (itype
) != SAVE_EXPR
)
8306 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8307 they might survive till gimplification. */
8308 tree newitype
= itype
;
8310 cp_walk_tree_without_duplicates (&newitype
,
8311 fold_sizeof_expr_r
, &found
);
8313 itype
= variable_size (fold (newitype
));
8316 /* Make sure that there was no overflow when creating to a signed
8317 index type. (For example, on a 32-bit machine, an array with
8318 size 2^32 - 1 is too big.) */
8319 else if (TREE_CODE (itype
) == INTEGER_CST
8320 && TREE_OVERFLOW (itype
))
8322 if (!(complain
& tf_error
))
8323 return error_mark_node
;
8324 error ("overflow in array dimension");
8325 TREE_OVERFLOW (itype
) = 0;
8329 /* Create and return the appropriate index type. */
8330 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8332 tree t
= build_index_type (itype
);
8333 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8334 itype
= abi_1_itype
;
8337 itype
= build_index_type (itype
);
8339 /* If the index type were dependent, we would have returned early, so
8340 remember that it isn't. */
8341 TYPE_DEPENDENT_P (itype
) = 0;
8342 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8346 /* Returns the scope (if any) in which the entity declared by
8347 DECLARATOR will be located. If the entity was declared with an
8348 unqualified name, NULL_TREE is returned. */
8351 get_scope_of_declarator (const cp_declarator
*declarator
)
8353 while (declarator
&& declarator
->kind
!= cdk_id
)
8354 declarator
= declarator
->declarator
;
8356 /* If the declarator-id is a SCOPE_REF, the scope in which the
8357 declaration occurs is the first operand. */
8359 && declarator
->u
.id
.qualifying_scope
)
8360 return declarator
->u
.id
.qualifying_scope
;
8362 /* Otherwise, the declarator is not a qualified name; the entity will
8363 be declared in the current scope. */
8367 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8368 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8372 create_array_type_for_decl (tree name
, tree type
, tree size
)
8374 tree itype
= NULL_TREE
;
8376 /* If things have already gone awry, bail now. */
8377 if (type
== error_mark_node
|| size
== error_mark_node
)
8378 return error_mark_node
;
8380 /* 8.3.4/1: If the type of the identifier of D contains the auto
8381 type-specifier, the program is ill-formed. */
8382 if (pedantic
&& type_uses_auto (type
))
8383 pedwarn (input_location
, OPT_Wpedantic
,
8384 "declaration of %qD as array of %<auto%>", name
);
8386 /* If there are some types which cannot be array elements,
8387 issue an error-message and return. */
8388 switch (TREE_CODE (type
))
8392 error ("declaration of %qD as array of void", name
);
8394 error ("creating array of void");
8395 return error_mark_node
;
8399 error ("declaration of %qD as array of functions", name
);
8401 error ("creating array of functions");
8402 return error_mark_node
;
8404 case REFERENCE_TYPE
:
8406 error ("declaration of %qD as array of references", name
);
8408 error ("creating array of references");
8409 return error_mark_node
;
8413 error ("declaration of %qD as array of function members", name
);
8415 error ("creating array of function members");
8416 return error_mark_node
;
8424 The constant expressions that specify the bounds of the arrays
8425 can be omitted only for the first member of the sequence. */
8426 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8429 error ("declaration of %qD as multidimensional array must "
8430 "have bounds for all dimensions except the first",
8433 error ("multidimensional array must have bounds for all "
8434 "dimensions except the first");
8436 return error_mark_node
;
8439 /* Figure out the index type for the array. */
8441 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8444 T is called the array element type; this type shall not be [...] an
8445 abstract class type. */
8446 abstract_virtuals_error (name
, type
);
8448 return build_cplus_array_type (type
, itype
);
8451 /* Check that it's OK to declare a function with the indicated TYPE.
8452 SFK indicates the kind of special function (if any) that this
8453 function is. OPTYPE is the type given in a conversion operator
8454 declaration, or the class type for a constructor/destructor.
8455 Returns the actual return type of the function; that
8456 may be different than TYPE if an error occurs, or for certain
8457 special functions. */
8460 check_special_function_return_type (special_function_kind sfk
,
8466 case sfk_constructor
:
8468 error ("return type specification for constructor invalid");
8470 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8471 type
= build_pointer_type (optype
);
8473 type
= void_type_node
;
8476 case sfk_destructor
:
8478 error ("return type specification for destructor invalid");
8479 /* We can't use the proper return type here because we run into
8480 problems with ambiguous bases and covariant returns.
8481 Java classes are left unchanged because (void *) isn't a valid
8482 Java type, and we don't want to change the Java ABI. */
8483 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8484 type
= build_pointer_type (void_type_node
);
8486 type
= void_type_node
;
8489 case sfk_conversion
:
8491 error ("return type specified for %<operator %T%>", optype
);
8502 /* A variable or data member (whose unqualified name is IDENTIFIER)
8503 has been declared with the indicated TYPE. If the TYPE is not
8504 acceptable, issue an error message and return a type to use for
8505 error-recovery purposes. */
8508 check_var_type (tree identifier
, tree type
)
8510 if (VOID_TYPE_P (type
))
8513 error ("unnamed variable or field declared void");
8514 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8516 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8517 error ("variable or field %qE declared void", identifier
);
8520 error ("variable or field declared void");
8521 type
= error_mark_node
;
8527 /* Given declspecs and a declarator (abstract or otherwise), determine
8528 the name and type of the object declared and construct a DECL node
8531 DECLSPECS points to the representation of declaration-specifier
8532 sequence that precedes declarator.
8534 DECL_CONTEXT says which syntactic context this declaration is in:
8535 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8536 FUNCDEF for a function definition. Like NORMAL but a few different
8537 error messages in each case. Return value may be zero meaning
8538 this definition is too screwy to try to parse.
8539 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8540 handle member functions (which have FIELD context).
8541 Return value may be zero meaning this definition is too screwy to
8543 PARM for a parameter declaration (either within a function prototype
8544 or before a function body). Make a PARM_DECL, or return void_type_node.
8545 TPARM for a template parameter declaration.
8546 CATCHPARM for a parameter declaration before a catch clause.
8547 TYPENAME if for a typename (in a cast or sizeof).
8548 Don't make a DECL node; just return the ..._TYPE node.
8549 FIELD for a struct or union field; make a FIELD_DECL.
8550 BITFIELD for a field with specified width.
8552 INITIALIZED is as for start_decl.
8554 ATTRLIST is a pointer to the list of attributes, which may be NULL
8555 if there are none; *ATTRLIST may be modified if attributes from inside
8556 the declarator should be applied to the declaration.
8558 When this function is called, scoping variables (such as
8559 CURRENT_CLASS_TYPE) should reflect the scope in which the
8560 declaration occurs, not the scope in which the new declaration will
8561 be placed. For example, on:
8565 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8568 Returns a DECL (if a declarator is present), a TYPE (if there is no
8569 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8573 grokdeclarator (const cp_declarator
*declarator
,
8574 cp_decl_specifier_seq
*declspecs
,
8575 enum decl_context decl_context
,
8579 tree type
= NULL_TREE
;
8581 int explicit_int128
= 0;
8582 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8583 int explicit_int
= 0;
8584 int explicit_char
= 0;
8585 int defaulted_int
= 0;
8586 tree dependent_name
= NULL_TREE
;
8588 tree typedef_decl
= NULL_TREE
;
8589 const char *name
= NULL
;
8590 tree typedef_type
= NULL_TREE
;
8591 /* True if this declarator is a function definition. */
8592 bool funcdef_flag
= false;
8593 cp_declarator_kind innermost_code
= cdk_error
;
8596 /* See the code below that used this. */
8597 tree decl_attr
= NULL_TREE
;
8600 /* Keep track of what sort of function is being processed
8601 so that we can warn about default return values, or explicit
8602 return values which do not match prescribed defaults. */
8603 special_function_kind sfk
= sfk_none
;
8605 tree dname
= NULL_TREE
;
8606 tree ctor_return_type
= NULL_TREE
;
8607 enum overload_flags flags
= NO_SPECIAL
;
8608 /* cv-qualifiers that apply to the declarator, for a declaration of
8609 a member function. */
8610 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8611 /* virt-specifiers that apply to the declarator, for a declaration of
8612 a member function. */
8613 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8614 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8616 tree raises
= NULL_TREE
;
8617 int template_count
= 0;
8618 tree returned_attrs
= NULL_TREE
;
8619 tree parms
= NULL_TREE
;
8620 const cp_declarator
*id_declarator
;
8621 /* The unqualified name of the declarator; either an
8622 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8623 tree unqualified_id
;
8624 /* The class type, if any, in which this entity is located,
8625 or NULL_TREE if none. Note that this value may be different from
8626 the current class type; for example if an attempt is made to declare
8627 "A::f" inside "B", this value will be "A". */
8628 tree ctype
= current_class_type
;
8629 /* The NAMESPACE_DECL for the namespace in which this entity is
8630 located. If an unqualified name is used to declare the entity,
8631 this value will be NULL_TREE, even if the entity is located at
8633 tree in_namespace
= NULL_TREE
;
8634 cp_storage_class storage_class
;
8635 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8636 bool type_was_error_mark_node
= false;
8637 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8638 bool template_type_arg
= false;
8639 bool template_parm_flag
= false;
8640 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8643 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8644 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8645 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8646 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8647 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8648 explicit_int128
= declspecs
->explicit_int128_p
;
8649 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8651 if (decl_context
== FUNCDEF
)
8652 funcdef_flag
= true, decl_context
= NORMAL
;
8653 else if (decl_context
== MEMFUNCDEF
)
8654 funcdef_flag
= true, decl_context
= FIELD
;
8655 else if (decl_context
== BITFIELD
)
8656 bitfield
= 1, decl_context
= FIELD
;
8657 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8658 template_type_arg
= true, decl_context
= TYPENAME
;
8659 else if (decl_context
== TPARM
)
8660 template_parm_flag
= true, decl_context
= PARM
;
8662 if (initialized
> 1)
8663 funcdef_flag
= true;
8665 /* Look inside a declarator for the name being declared
8666 and get it as a string, for an error message. */
8667 for (id_declarator
= declarator
;
8669 id_declarator
= id_declarator
->declarator
)
8671 if (id_declarator
->kind
!= cdk_id
)
8672 innermost_code
= id_declarator
->kind
;
8674 switch (id_declarator
->kind
)
8677 if (id_declarator
->declarator
8678 && id_declarator
->declarator
->kind
== cdk_id
)
8680 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8681 if (sfk
== sfk_destructor
)
8688 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8689 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8692 if (qualifying_scope
)
8694 if (at_function_scope_p ())
8698 A declarator-id shall not be qualified except
8701 None of the cases are permitted in block
8703 if (qualifying_scope
== global_namespace
)
8704 error ("invalid use of qualified-name %<::%D%>",
8706 else if (TYPE_P (qualifying_scope
))
8707 error ("invalid use of qualified-name %<%T::%D%>",
8708 qualifying_scope
, decl
);
8710 error ("invalid use of qualified-name %<%D::%D%>",
8711 qualifying_scope
, decl
);
8712 return error_mark_node
;
8714 else if (TYPE_P (qualifying_scope
))
8716 ctype
= qualifying_scope
;
8717 if (!MAYBE_CLASS_TYPE_P (ctype
))
8719 error ("%q#T is not a class or a namespace", ctype
);
8722 else if (innermost_code
!= cdk_function
8723 && current_class_type
8724 && !uniquely_derived_from_p (ctype
,
8725 current_class_type
))
8727 error ("type %qT is not derived from type %qT",
8728 ctype
, current_class_type
);
8729 return error_mark_node
;
8732 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8733 in_namespace
= qualifying_scope
;
8735 switch (TREE_CODE (decl
))
8741 if (innermost_code
!= cdk_function
)
8743 error ("declaration of %qD as non-function", decl
);
8744 return error_mark_node
;
8746 else if (!qualifying_scope
8747 && !(current_class_type
&& at_class_scope_p ()))
8749 error ("declaration of %qD as non-member", decl
);
8750 return error_mark_node
;
8753 type
= TREE_OPERAND (decl
, 0);
8755 type
= constructor_name (type
);
8756 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8761 case TEMPLATE_ID_EXPR
:
8763 tree fns
= TREE_OPERAND (decl
, 0);
8766 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8768 gcc_assert (is_overloaded_fn (dname
));
8769 dname
= DECL_NAME (get_first_fn (dname
));
8774 case IDENTIFIER_NODE
:
8775 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8778 if (C_IS_RESERVED_WORD (dname
))
8780 error ("declarator-id missing; using reserved word %qD",
8782 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8784 else if (!IDENTIFIER_TYPENAME_P (dname
))
8785 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8788 gcc_assert (flags
== NO_SPECIAL
);
8789 flags
= TYPENAME_FLAG
;
8790 ctor_return_type
= TREE_TYPE (dname
);
8791 sfk
= sfk_conversion
;
8792 if (is_typename_at_global_scope (dname
))
8793 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8795 name
= "<invalid operator>";
8812 return error_mark_node
;
8817 if (id_declarator
->kind
== cdk_id
)
8823 The declarator in a function-definition shall have the form
8824 D1 ( parameter-declaration-clause) ... */
8825 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8827 error ("function definition does not declare parameters");
8828 return error_mark_node
;
8831 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8832 && innermost_code
!= cdk_function
8833 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8835 error ("declaration of %qD as non-function", dname
);
8836 return error_mark_node
;
8840 && TREE_CODE (dname
) == IDENTIFIER_NODE
8841 && UDLIT_OPER_P (dname
)
8842 && innermost_code
!= cdk_function
)
8844 error ("declaration of %qD as non-function", dname
);
8845 return error_mark_node
;
8848 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8850 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
8852 error ("declaration of %qD as %<typedef%>", dname
);
8853 return error_mark_node
;
8855 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8857 error ("declaration of %qD as parameter", dname
);
8858 return error_mark_node
;
8862 /* Anything declared one level down from the top level
8863 must be one of the parameters of a function
8864 (because the body is at least two levels down). */
8866 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8867 by not allowing C++ class definitions to specify their parameters
8868 with xdecls (must be spec.d in the parmlist).
8870 Since we now wait to push a class scope until we are sure that
8871 we are in a legitimate method context, we must set oldcname
8872 explicitly (since current_class_name is not yet alive).
8874 We also want to avoid calling this a PARM if it is in a namespace. */
8876 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8878 cp_binding_level
*b
= current_binding_level
;
8879 current_binding_level
= b
->level_chain
;
8880 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8881 decl_context
= PARM
;
8882 current_binding_level
= b
;
8886 name
= decl_context
== PARM
? "parameter" : "type name";
8888 if (constexpr_p
&& decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
8890 error ("%<constexpr%> cannot appear in a typedef declaration");
8891 return error_mark_node
;
8894 /* If there were multiple types specified in the decl-specifier-seq,
8895 issue an error message. */
8896 if (declspecs
->multiple_types_p
)
8898 error ("two or more data types in declaration of %qs", name
);
8899 return error_mark_node
;
8902 if (declspecs
->conflicting_specifiers_p
)
8904 error ("conflicting specifiers in declaration of %qs", name
);
8905 return error_mark_node
;
8908 /* Extract the basic type from the decl-specifier-seq. */
8909 type
= declspecs
->type
;
8910 if (type
== error_mark_node
)
8913 type_was_error_mark_node
= true;
8915 /* If the entire declaration is itself tagged as deprecated then
8916 suppress reports of deprecated items. */
8917 if (type
&& TREE_DEPRECATED (type
)
8918 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8919 warn_deprecated_use (type
, NULL_TREE
);
8920 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8922 typedef_decl
= type
;
8923 type
= TREE_TYPE (typedef_decl
);
8924 if (TREE_DEPRECATED (type
)
8925 && DECL_ARTIFICIAL (typedef_decl
)
8926 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8927 warn_deprecated_use (type
, NULL_TREE
);
8929 /* No type at all: default to `int', and set DEFAULTED_INT
8930 because it was not a user-defined typedef. */
8931 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8933 /* These imply 'int'. */
8934 type
= integer_type_node
;
8938 explicit_int
= declspecs
->explicit_int_p
;
8939 explicit_char
= declspecs
->explicit_char_p
;
8942 /* See the code below that used this. */
8944 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8946 typedef_type
= type
;
8949 if (sfk
!= sfk_conversion
)
8950 ctor_return_type
= ctype
;
8952 if (sfk
!= sfk_none
)
8953 type
= check_special_function_return_type (sfk
, type
,
8955 else if (type
== NULL_TREE
)
8961 /* We handle `main' specially here, because 'main () { }' is so
8962 common. With no options, it is allowed. With -Wreturn-type,
8963 it is a warning. It is only an error with -pedantic-errors. */
8964 is_main
= (funcdef_flag
8965 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8966 && MAIN_NAME_P (dname
)
8967 && ctype
== NULL_TREE
8968 && in_namespace
== NULL_TREE
8969 && current_namespace
== global_namespace
);
8971 if (type_was_error_mark_node
)
8972 /* We've already issued an error, don't complain more. */;
8973 else if (in_system_header
|| flag_ms_extensions
)
8974 /* Allow it, sigh. */;
8976 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8978 pedwarn (input_location
, OPT_Wpedantic
,
8979 "ISO C++ forbids declaration of %qs with no type", name
);
8981 warning (OPT_Wreturn_type
,
8982 "ISO C++ forbids declaration of %qs with no type", name
);
8984 type
= integer_type_node
;
8989 if (explicit_int128
)
8991 if (int128_integer_type_node
== NULL_TREE
)
8993 error ("%<__int128%> is not supported by this target");
8994 explicit_int128
= false;
8996 else if (pedantic
&& ! in_system_header
)
8997 pedwarn (input_location
, OPT_Wpedantic
,
8998 "ISO C++ does not support %<__int128%> for %qs", name
);
9001 /* Now process the modifiers that were specified
9002 and check for invalid combinations. */
9004 /* Long double is a special combination. */
9005 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9008 type
= cp_build_qualified_type (long_double_type_node
,
9009 cp_type_quals (type
));
9012 /* Check all other uses of type modifiers. */
9014 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9018 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9019 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9020 else if (signed_p
&& unsigned_p
)
9021 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9022 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9023 error ("%<long long%> invalid for %qs", name
);
9024 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9025 error ("%<long%> invalid for %qs", name
);
9026 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9027 error ("%<short%> invalid for %qs", name
);
9028 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9029 error ("%<long%> or %<short%> invalid for %qs", name
);
9030 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9031 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9032 else if ((long_p
|| short_p
) && explicit_char
)
9033 error ("%<long%> or %<short%> specified with char for %qs", name
);
9034 else if (long_p
&& short_p
)
9035 error ("%<long%> and %<short%> specified together for %qs", name
);
9036 else if (type
== char16_type_node
|| type
== char32_type_node
)
9038 if (signed_p
|| unsigned_p
)
9039 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9040 else if (short_p
|| long_p
)
9041 error ("%<short%> or %<long%> invalid for %qs", name
);
9046 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9048 pedwarn (input_location
, OPT_Wpedantic
,
9049 "long, short, signed or unsigned used invalidly for %qs",
9051 if (flag_pedantic_errors
)
9056 /* Discard the type modifiers if they are invalid. */
9067 /* Decide whether an integer type is signed or not.
9068 Optionally treat bitfields as signed by default. */
9072 It is implementation-defined whether a plain (neither
9073 explicitly signed or unsigned) char, short, int, or long
9074 bit-field is signed or unsigned.
9076 Naturally, we extend this to long long as well. Note that
9077 this does not include wchar_t. */
9078 || (bitfield
&& !flag_signed_bitfields
9080 /* A typedef for plain `int' without `signed' can be
9081 controlled just like plain `int', but a typedef for
9082 `signed int' cannot be so controlled. */
9084 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9085 && TREE_CODE (type
) == INTEGER_TYPE
9086 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9088 if (explicit_int128
)
9089 type
= int128_unsigned_type_node
;
9091 type
= long_long_unsigned_type_node
;
9093 type
= long_unsigned_type_node
;
9095 type
= short_unsigned_type_node
;
9096 else if (type
== char_type_node
)
9097 type
= unsigned_char_type_node
;
9098 else if (typedef_decl
)
9099 type
= unsigned_type_for (type
);
9101 type
= unsigned_type_node
;
9103 else if (signed_p
&& type
== char_type_node
)
9104 type
= signed_char_type_node
;
9105 else if (explicit_int128
)
9106 type
= int128_integer_type_node
;
9108 type
= long_long_integer_type_node
;
9110 type
= long_integer_type_node
;
9112 type
= short_integer_type_node
;
9114 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9116 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9117 error ("complex invalid for %qs", name
);
9118 /* If we just have "complex", it is equivalent to
9119 "complex double", but if any modifiers at all are specified it is
9120 the complex form of TYPE. E.g, "complex short" is
9121 "complex short int". */
9122 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9123 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9124 type
= complex_double_type_node
;
9125 else if (type
== integer_type_node
)
9126 type
= complex_integer_type_node
;
9127 else if (type
== float_type_node
)
9128 type
= complex_float_type_node
;
9129 else if (type
== double_type_node
)
9130 type
= complex_double_type_node
;
9131 else if (type
== long_double_type_node
)
9132 type
= complex_long_double_type_node
;
9134 type
= build_complex_type (type
);
9137 type_quals
= TYPE_UNQUALIFIED
;
9138 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9139 type_quals
|= TYPE_QUAL_CONST
;
9140 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9141 type_quals
|= TYPE_QUAL_VOLATILE
;
9142 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9143 type_quals
|= TYPE_QUAL_RESTRICT
;
9144 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9145 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9148 /* If we're using the injected-class-name to form a compound type or a
9149 declaration, replace it with the underlying class so we don't get
9150 redundant typedefs in the debug output. But if we are returning the
9151 type unchanged, leave it alone so that it's available to
9152 maybe_get_template_decl_from_type_decl. */
9153 if (CLASS_TYPE_P (type
)
9154 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9155 && type
== TREE_TYPE (TYPE_NAME (type
))
9156 && (declarator
|| type_quals
))
9157 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9159 type_quals
|= cp_type_quals (type
);
9160 type
= cp_build_qualified_type_real
9161 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9162 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9163 /* We might have ignored or rejected some of the qualifiers. */
9164 type_quals
= cp_type_quals (type
);
9167 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9168 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9169 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9171 storage_class
= declspecs
->storage_class
;
9172 if (storage_class
== sc_static
)
9173 staticp
= 1 + (decl_context
== FIELD
);
9175 if (virtualp
&& staticp
== 2)
9177 error ("member %qD cannot be declared both virtual and static", dname
);
9178 storage_class
= sc_none
;
9181 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9183 if (dependent_name
&& !friendp
)
9185 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
9186 return error_mark_node
;
9189 /* Issue errors about use of storage classes for parameters. */
9190 if (decl_context
== PARM
)
9192 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9194 error ("typedef declaration invalid in parameter declaration");
9195 return error_mark_node
;
9197 else if (template_parm_flag
&& storage_class
!= sc_none
)
9199 error ("storage class specified for template parameter %qs", name
);
9200 return error_mark_node
;
9202 else if (storage_class
== sc_static
9203 || storage_class
== sc_extern
9205 error ("storage class specifiers invalid in parameter declarations");
9207 /* Function parameters cannot be constexpr. If we saw one, moan
9208 and pretend it wasn't there. */
9211 error ("a parameter cannot be declared %<constexpr%>");
9216 /* Give error if `virtual' is used outside of class declaration. */
9218 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9220 error ("%<virtual%> outside class declaration");
9224 /* Static anonymous unions are dealt with here. */
9225 if (staticp
&& decl_context
== TYPENAME
9227 && ANON_AGGR_TYPE_P (declspecs
->type
))
9228 decl_context
= FIELD
;
9230 /* Warn about storage classes that are invalid for certain
9231 kinds of declarations (parameters, typenames, etc.). */
9234 && storage_class
!= sc_extern
9235 && storage_class
!= sc_static
)
9236 || decl_spec_seq_has_spec_p (declspecs
, ds_typedef
)))
9238 error ("multiple storage classes in declaration of %qs", name
);
9241 if (decl_context
!= NORMAL
9242 && ((storage_class
!= sc_none
9243 && storage_class
!= sc_mutable
)
9246 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9247 && (storage_class
== sc_register
9248 || storage_class
== sc_auto
))
9250 else if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9252 else if (decl_context
== FIELD
9253 /* C++ allows static class elements. */
9254 && storage_class
== sc_static
)
9255 /* C++ also allows inlines and signed and unsigned elements,
9256 but in those cases we don't come in here. */
9260 if (decl_context
== FIELD
)
9261 error ("storage class specified for %qs", name
);
9264 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9265 error ("storage class specified for parameter %qs", name
);
9267 error ("storage class specified for typename");
9269 if (storage_class
== sc_register
9270 || storage_class
== sc_auto
9271 || storage_class
== sc_extern
9273 storage_class
= sc_none
;
9276 else if (storage_class
== sc_extern
&& funcdef_flag
9277 && ! toplevel_bindings_p ())
9278 error ("nested function %qs declared %<extern%>", name
);
9279 else if (toplevel_bindings_p ())
9281 if (storage_class
== sc_auto
)
9282 error ("top-level declaration of %qs specifies %<auto%>", name
);
9285 && storage_class
!= sc_extern
9286 && storage_class
!= sc_static
)
9288 if (declspecs
->gnu_thread_keyword_p
)
9289 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9290 "declared %<__thread%>", name
);
9292 /* When thread_local is applied to a variable of block scope the
9293 storage-class-specifier static is implied if it does not appear
9295 storage_class
= declspecs
->storage_class
= sc_static
;
9299 if (storage_class
&& friendp
)
9301 error ("storage class specifiers invalid in friend function declarations");
9302 storage_class
= sc_none
;
9307 unqualified_id
= NULL_TREE
;
9310 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9311 switch (TREE_CODE (unqualified_id
))
9314 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9315 if (TYPE_P (unqualified_id
))
9316 unqualified_id
= constructor_name (unqualified_id
);
9319 case IDENTIFIER_NODE
:
9320 case TEMPLATE_ID_EXPR
:
9328 if (declspecs
->std_attributes
)
9330 /* Apply the c++11 attributes to the type preceding them. */
9331 source_location saved_loc
= input_location
;
9332 input_location
= declspecs
->locations
[ds_std_attribute
];
9333 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9334 input_location
= saved_loc
;
9337 /* Determine the type of the entity declared by recurring on the
9339 for (; declarator
; declarator
= declarator
->declarator
)
9341 const cp_declarator
*inner_declarator
;
9344 if (type
== error_mark_node
)
9345 return error_mark_node
;
9347 attrs
= declarator
->attributes
;
9353 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9354 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9355 if (declarator
->kind
== cdk_function
)
9356 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9357 if (declarator
->kind
== cdk_array
)
9358 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9359 returned_attrs
= decl_attributes (&type
,
9360 chainon (returned_attrs
, attrs
),
9364 if (declarator
->kind
== cdk_id
)
9367 inner_declarator
= declarator
->declarator
;
9369 switch (declarator
->kind
)
9372 type
= create_array_type_for_decl (dname
, type
,
9373 declarator
->u
.array
.bounds
);
9374 if (declarator
->std_attributes
)
9377 The optional attribute-specifier-seq appertains to the
9379 returned_attrs
= chainon (returned_attrs
,
9380 declarator
->std_attributes
);
9388 /* Declaring a function type.
9389 Make sure we have a valid type for the function to return. */
9391 if (type_quals
!= TYPE_UNQUALIFIED
)
9393 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9394 warning (OPT_Wignored_qualifiers
,
9395 "type qualifiers ignored on function return type");
9396 /* We now know that the TYPE_QUALS don't apply to the
9397 decl, but to its return type. */
9398 type_quals
= TYPE_UNQUALIFIED
;
9400 errmsg
= targetm
.invalid_return_type (type
);
9404 type
= integer_type_node
;
9407 /* Error about some types functions can't return. */
9409 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9411 error ("%qs declared as function returning a function", name
);
9412 return error_mark_node
;
9414 if (TREE_CODE (type
) == ARRAY_TYPE
)
9416 error ("%qs declared as function returning an array", name
);
9417 return error_mark_node
;
9419 /* When decl_context == NORMAL we emit a better error message
9420 later in abstract_virtuals_error. */
9421 if (decl_context
== TYPENAME
&& ABSTRACT_CLASS_TYPE_P (type
))
9422 error ("%qs declared as function returning an abstract "
9423 "class type", name
);
9425 /* Pick up type qualifiers which should be applied to `this'. */
9426 memfn_quals
= declarator
->u
.function
.qualifiers
;
9427 /* Pick up virt-specifiers. */
9428 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9429 /* Pick up the exception specifications. */
9430 raises
= declarator
->u
.function
.exception_specification
;
9431 /* If the exception-specification is ill-formed, let's pretend
9432 there wasn't one. */
9433 if (raises
== error_mark_node
)
9436 /* Say it's a definition only for the CALL_EXPR
9437 closest to the identifier. */
9438 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9440 /* Handle a late-specified return type. */
9443 if (type_uses_auto (type
))
9445 if (!declarator
->u
.function
.late_return_type
)
9447 if (current_class_type
9448 && LAMBDA_TYPE_P (current_class_type
))
9449 /* OK for C++11 lambdas. */;
9450 else if (cxx_dialect
< cxx1y
)
9451 pedwarn (input_location
, 0, "%qs function uses "
9452 "%<auto%> type specifier without trailing "
9453 "return type", name
);
9455 else if (!is_auto (type
))
9457 error ("%qs function with trailing return type has"
9458 " %qT as its type rather than plain %<auto%>",
9460 return error_mark_node
;
9463 else if (declarator
->u
.function
.late_return_type
)
9465 if (cxx_dialect
< cxx0x
)
9466 /* Not using maybe_warn_cpp0x because this should
9467 always be an error. */
9468 error ("trailing return type only available with "
9469 "-std=c++11 or -std=gnu++11");
9471 error ("%qs function with trailing return type not "
9472 "declared with %<auto%> type specifier", name
);
9473 return error_mark_node
;
9476 type
= splice_late_return_type
9477 (type
, declarator
->u
.function
.late_return_type
);
9478 if (type
== error_mark_node
)
9479 return error_mark_node
;
9481 if (ctype
== NULL_TREE
9482 && decl_context
== FIELD
9484 && (friendp
== 0 || dname
== current_class_name
))
9485 ctype
= current_class_type
;
9487 if (ctype
&& (sfk
== sfk_constructor
9488 || sfk
== sfk_destructor
))
9490 /* We are within a class's scope. If our declarator name
9491 is the same as the class name, and we are defining
9492 a function, then it is a constructor/destructor, and
9493 therefore returns a void type. */
9495 /* ISO C++ 12.4/2. A destructor may not be declared
9496 const or volatile. A destructor may not be
9499 ISO C++ 12.1. A constructor may not be declared
9500 const or volatile. A constructor may not be
9501 virtual. A constructor may not be static. */
9503 error ((flags
== DTOR_FLAG
)
9504 ? G_("destructor cannot be static member function")
9505 : G_("constructor cannot be static member function"));
9508 error ((flags
== DTOR_FLAG
)
9509 ? G_("destructors may not be cv-qualified")
9510 : G_("constructors may not be cv-qualified"));
9511 memfn_quals
= TYPE_UNQUALIFIED
;
9514 if (decl_context
== FIELD
9515 && !member_function_or_else (ctype
,
9518 return error_mark_node
;
9520 if (flags
!= DTOR_FLAG
)
9522 /* It's a constructor. */
9527 permerror (input_location
, "constructors cannot be declared virtual");
9530 if (decl_context
== FIELD
9531 && sfk
!= sfk_constructor
)
9532 return error_mark_node
;
9534 if (decl_context
== FIELD
)
9540 error ("can%'t initialize friend function %qs", name
);
9543 /* Cannot be both friend and virtual. */
9544 error ("virtual functions cannot be friends");
9547 if (decl_context
== NORMAL
)
9548 error ("friend declaration not in class definition");
9549 if (current_function_decl
&& funcdef_flag
)
9550 error ("can%'t define friend function %qs in a local "
9554 else if (ctype
&& sfk
== sfk_conversion
)
9558 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9563 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9566 if (inner_declarator
9567 && inner_declarator
->kind
== cdk_id
9568 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9569 && arg_types
!= void_list_node
)
9571 error ("destructors may not have parameters");
9572 arg_types
= void_list_node
;
9576 type
= build_function_type (type
, arg_types
);
9577 if (declarator
->std_attributes
)
9580 The optional attribute-specifier-seq appertains to
9581 the function type. */
9582 decl_attributes (&type
, declarator
->std_attributes
,
9590 /* Filter out pointers-to-references and references-to-references.
9591 We can get these if a TYPE_DECL is used. */
9593 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9595 if (declarator
->kind
!= cdk_reference
)
9597 error ("cannot declare pointer to %q#T", type
);
9598 type
= TREE_TYPE (type
);
9601 /* In C++0x, we allow reference to reference declarations
9602 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9603 and template type arguments [14.3.1/4 temp.arg.type]. The
9604 check for direct reference to reference declarations, which
9605 are still forbidden, occurs below. Reasoning behind the change
9606 can be found in DR106, DR540, and the rvalue reference
9608 else if (cxx_dialect
== cxx98
)
9610 error ("cannot declare reference to %q#T", type
);
9611 type
= TREE_TYPE (type
);
9614 else if (VOID_TYPE_P (type
))
9616 if (declarator
->kind
== cdk_reference
)
9617 error ("cannot declare reference to %q#T", type
);
9618 else if (declarator
->kind
== cdk_ptrmem
)
9619 error ("cannot declare pointer to %q#T member", type
);
9622 /* We now know that the TYPE_QUALS don't apply to the decl,
9623 but to the target of the pointer. */
9624 type_quals
= TYPE_UNQUALIFIED
;
9626 if (declarator
->kind
== cdk_ptrmem
9627 && (TREE_CODE (type
) == FUNCTION_TYPE
9628 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9630 memfn_quals
|= type_memfn_quals (type
);
9631 type
= build_memfn_type (type
,
9632 declarator
->u
.pointer
.class_type
,
9634 if (type
== error_mark_node
)
9635 return error_mark_node
;
9636 memfn_quals
= TYPE_UNQUALIFIED
;
9639 if (TREE_CODE (type
) == FUNCTION_TYPE
9640 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9641 error (declarator
->kind
== cdk_reference
9642 ? G_("cannot declare reference to qualified function type %qT")
9643 : G_("cannot declare pointer to qualified function type %qT"),
9646 /* When the pointed-to type involves components of variable size,
9647 care must be taken to ensure that the size evaluation code is
9648 emitted early enough to dominate all the possible later uses
9649 and late enough for the variables on which it depends to have
9652 This is expected to happen automatically when the pointed-to
9653 type has a name/declaration of it's own, but special attention
9654 is required if the type is anonymous.
9656 We handle the NORMAL and FIELD contexts here by inserting a
9657 dummy statement that just evaluates the size at a safe point
9658 and ensures it is not deferred until e.g. within a deeper
9659 conditional context (c++/43555).
9661 We expect nothing to be needed here for PARM or TYPENAME.
9662 Evaluating the size at this point for TYPENAME would
9663 actually be incorrect, as we might be in the middle of an
9664 expression with side effects on the pointed-to type size
9665 "arguments" prior to the pointer declaration point and the
9666 size evaluation could end up prior to the side effects. */
9668 if (!TYPE_NAME (type
)
9669 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9670 && at_function_scope_p ()
9671 && variably_modified_type_p (type
, NULL_TREE
))
9673 /* First break out any side-effects. */
9674 stabilize_vla_size (TYPE_SIZE (type
));
9675 /* And then force evaluation of the SAVE_EXPR. */
9676 finish_expr_stmt (TYPE_SIZE (type
));
9679 if (declarator
->kind
== cdk_reference
)
9681 /* In C++0x, the type we are creating a reference to might be
9682 a typedef which is itself a reference type. In that case,
9683 we follow the reference collapsing rules in
9684 [7.1.3/8 dcl.typedef] to create the final reference type:
9686 "If a typedef TD names a type that is a reference to a type
9687 T, an attempt to create the type 'lvalue reference to cv TD'
9688 creates the type 'lvalue reference to T,' while an attempt
9689 to create the type "rvalue reference to cv TD' creates the
9692 if (VOID_TYPE_P (type
))
9693 /* We already gave an error. */;
9694 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9696 if (declarator
->u
.reference
.rvalue_ref
)
9697 /* Leave type alone. */;
9699 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9702 type
= cp_build_reference_type
9703 (type
, declarator
->u
.reference
.rvalue_ref
);
9705 /* In C++0x, we need this check for direct reference to
9706 reference declarations, which are forbidden by
9707 [8.3.2/5 dcl.ref]. Reference to reference declarations
9708 are only allowed indirectly through typedefs and template
9709 type arguments. Example:
9711 void foo(int & &); // invalid ref-to-ref decl
9713 typedef int & int_ref;
9714 void foo(int_ref &); // valid ref-to-ref decl
9716 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9717 error ("cannot declare reference to %q#T, which is not "
9718 "a typedef or a template type argument", type
);
9720 else if (TREE_CODE (type
) == METHOD_TYPE
)
9721 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9722 else if (declarator
->kind
== cdk_ptrmem
)
9724 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9726 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9727 /* We will already have complained. */
9728 type
= error_mark_node
;
9730 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9734 type
= build_pointer_type (type
);
9736 /* Process a list of type modifier keywords (such as
9737 const or volatile) that were given inside the `*' or `&'. */
9739 if (declarator
->u
.pointer
.qualifiers
)
9742 = cp_build_qualified_type (type
,
9743 declarator
->u
.pointer
.qualifiers
);
9744 type_quals
= cp_type_quals (type
);
9747 /* Apply C++11 attributes to the pointer, and not to the
9748 type pointed to. This is unlike what is done for GNU
9749 attributes above. It is to comply with [dcl.ptr]/1:
9751 [the optional attribute-specifier-seq (7.6.1) appertains
9752 to the pointer and not to the object pointed to]. */
9753 if (declarator
->std_attributes
)
9754 decl_attributes (&type
, declarator
->std_attributes
,
9768 /* We need to stabilize side-effects in VLA sizes for regular array
9769 declarations too, not just pointers to arrays. */
9770 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9771 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9772 && at_function_scope_p ()
9773 && variably_modified_type_p (type
, NULL_TREE
))
9774 stabilize_vla_size (TYPE_SIZE (type
));
9776 /* A `constexpr' specifier used in an object declaration declares
9777 the object as `const'. */
9778 if (constexpr_p
&& innermost_code
!= cdk_function
)
9780 if (type_quals
& TYPE_QUAL_VOLATILE
)
9781 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9782 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9784 type_quals
|= TYPE_QUAL_CONST
;
9785 type
= cp_build_qualified_type (type
, type_quals
);
9789 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9790 && TREE_CODE (type
) != FUNCTION_TYPE
9791 && TREE_CODE (type
) != METHOD_TYPE
)
9793 error ("template-id %qD used as a declarator",
9795 unqualified_id
= dname
;
9798 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9799 qualified with a class-name, turn it into a METHOD_TYPE, unless
9800 we know that the function is static. We take advantage of this
9801 opportunity to do other processing that pertains to entities
9802 explicitly declared to be class members. Note that if DECLARATOR
9803 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9804 would not have exited the loop above. */
9806 && declarator
->u
.id
.qualifying_scope
9807 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9809 ctype
= declarator
->u
.id
.qualifying_scope
;
9810 ctype
= TYPE_MAIN_VARIANT (ctype
);
9811 template_count
= num_template_headers_for_class (ctype
);
9813 if (ctype
== current_class_type
)
9817 permerror (input_location
, "member functions are implicitly friends of their class");
9821 permerror (declarator
->id_loc
,
9822 "extra qualification %<%T::%> on member %qs",
9825 else if (/* If the qualifying type is already complete, then we
9826 can skip the following checks. */
9827 !COMPLETE_TYPE_P (ctype
)
9828 && (/* If the function is being defined, then
9829 qualifying type must certainly be complete. */
9831 /* A friend declaration of "T::f" is OK, even if
9832 "T" is a template parameter. But, if this
9833 function is not a friend, the qualifying type
9835 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9836 /* For a declaration, the type need not be
9837 complete, if either it is dependent (since there
9838 is no meaningful definition of complete in that
9839 case) or the qualifying class is currently being
9841 || !(dependent_type_p (ctype
)
9842 || currently_open_class (ctype
)))
9843 /* Check that the qualifying type is complete. */
9844 && !complete_type_or_else (ctype
, NULL_TREE
))
9845 return error_mark_node
;
9846 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9848 if (current_class_type
9849 && (!friendp
|| funcdef_flag
))
9852 ? G_("cannot define member function %<%T::%s%> "
9854 : G_("cannot declare member function %<%T::%s%> "
9856 ctype
, name
, current_class_type
);
9857 return error_mark_node
;
9860 else if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
)
9861 && current_class_type
)
9863 error ("cannot declare member %<%T::%s%> within %qT",
9864 ctype
, name
, current_class_type
);
9865 return error_mark_node
;
9869 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9870 ctype
= current_class_type
;
9872 /* Now TYPE has the actual type. */
9877 *attrlist
= chainon (returned_attrs
, *attrlist
);
9879 attrlist
= &returned_attrs
;
9883 && declarator
->kind
== cdk_id
9884 && declarator
->std_attributes
)
9885 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
9886 a declarator-id appertains to the entity that is declared. */
9887 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
9889 /* Handle parameter packs. */
9890 if (parameter_pack_p
)
9892 if (decl_context
== PARM
)
9893 /* Turn the type into a pack expansion.*/
9894 type
= make_pack_expansion (type
);
9896 error ("non-parameter %qs cannot be a parameter pack", name
);
9899 /* Did array size calculations overflow or does the array cover more
9900 than half of the address-space? */
9901 if (TREE_CODE (type
) == ARRAY_TYPE
9902 && COMPLETE_TYPE_P (type
)
9903 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9904 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
9906 error ("size of array %qs is too large", name
);
9907 /* If we proceed with the array type as it is, we'll eventually
9908 crash in tree_low_cst(). */
9909 type
= error_mark_node
;
9912 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9913 && !processing_template_decl
9914 && variably_modified_type_p (type
, NULL_TREE
))
9916 if (decl_context
== FIELD
)
9917 error ("data member may not have variably modified type %qT", type
);
9919 error ("parameter may not have variably modified type %qT", type
);
9920 type
= error_mark_node
;
9923 if (explicitp
== 1 || (explicitp
&& friendp
))
9925 /* [dcl.fct.spec] The explicit specifier shall only be used in
9926 declarations of constructors within a class definition. */
9927 error ("only declarations of constructors can be %<explicit%>");
9931 if (storage_class
== sc_mutable
)
9933 if (decl_context
!= FIELD
|| friendp
)
9935 error ("non-member %qs cannot be declared %<mutable%>", name
);
9936 storage_class
= sc_none
;
9938 else if (decl_context
== TYPENAME
9939 || decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9941 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9942 storage_class
= sc_none
;
9944 else if (TREE_CODE (type
) == FUNCTION_TYPE
9945 || TREE_CODE (type
) == METHOD_TYPE
)
9947 error ("function %qs cannot be declared %<mutable%>", name
);
9948 storage_class
= sc_none
;
9952 error ("static %qs cannot be declared %<mutable%>", name
);
9953 storage_class
= sc_none
;
9955 else if (type_quals
& TYPE_QUAL_CONST
)
9957 error ("const %qs cannot be declared %<mutable%>", name
);
9958 storage_class
= sc_none
;
9960 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9962 permerror (input_location
, "reference %qs cannot be declared "
9963 "%<mutable%>", name
);
9964 storage_class
= sc_none
;
9968 /* If this is declaring a typedef name, return a TYPE_DECL. */
9969 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
) && decl_context
!= TYPENAME
)
9973 /* Note that the grammar rejects storage classes
9974 in typenames, fields or parameters. */
9975 if (current_lang_name
== lang_name_java
)
9976 TYPE_FOR_JAVA (type
) = 1;
9978 /* This declaration:
9980 typedef void f(int) const;
9982 declares a function type which is not a member of any
9983 particular class, but which is cv-qualified; for
9984 example "f S::*" declares a pointer to a const-qualified
9985 member function of S. We record the cv-qualification in the
9987 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9989 type
= apply_memfn_quals (type
, memfn_quals
);
9991 /* We have now dealt with these qualifiers. */
9992 memfn_quals
= TYPE_UNQUALIFIED
;
9995 if (type_uses_auto (type
))
9997 error ("typedef declared %<auto%>");
9998 type
= error_mark_node
;
10001 if (decl_context
== FIELD
)
10002 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10004 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10005 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10006 error_at (DECL_SOURCE_LOCATION (decl
),
10007 "typedef name may not be a nested-name-specifier");
10008 TREE_TYPE (decl
) = error_mark_node
;
10011 if (decl_context
!= FIELD
)
10013 if (!current_function_decl
)
10014 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10015 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10016 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10017 (current_function_decl
)))
10018 /* The TYPE_DECL is "abstract" because there will be
10019 clones of this constructor/destructor, and there will
10020 be copies of this TYPE_DECL generated in those
10022 DECL_ABSTRACT (decl
) = 1;
10024 else if (current_class_type
10025 && constructor_name_p (unqualified_id
, current_class_type
))
10026 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10027 "as enclosing class",
10030 /* If the user declares "typedef struct {...} foo" then the
10031 struct will have an anonymous name. Fill that name in now.
10032 Nothing can refer to it, so nothing needs know about the name
10034 if (type
!= error_mark_node
10036 && TYPE_NAME (type
)
10037 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10038 && TYPE_ANONYMOUS_P (type
)
10039 && declspecs
->type_definition_p
10040 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10044 /* Replace the anonymous name with the real name everywhere. */
10045 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10047 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10048 /* We do not rename the debug info representing the
10049 anonymous tagged type because the standard says in
10050 [dcl.typedef] that the naming applies only for
10051 linkage purposes. */
10052 /*debug_hooks->set_name (t, decl);*/
10053 TYPE_NAME (t
) = decl
;
10056 if (TYPE_LANG_SPECIFIC (type
))
10057 TYPE_WAS_ANONYMOUS (type
) = 1;
10059 /* If this is a typedef within a template class, the nested
10060 type is a (non-primary) template. The name for the
10061 template needs updating as well. */
10062 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10063 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10064 = TYPE_IDENTIFIER (type
);
10066 /* Adjust linkage now that we aren't anonymous anymore. */
10067 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
10068 determine_visibility (TYPE_MAIN_DECL (type
));
10070 /* FIXME remangle member functions; member functions of a
10071 type with external linkage have external linkage. */
10075 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10076 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10078 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10079 memfn_quals
!= TYPE_UNQUALIFIED
,
10080 inlinep
, friendp
, raises
!= NULL_TREE
);
10082 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10083 /* Acknowledge that this was written:
10084 `using analias = atype;'. */
10085 TYPE_DECL_ALIAS_P (decl
) = 1;
10090 /* Detect the case of an array type of unspecified size
10091 which came, as such, direct from a typedef name.
10092 We must copy the type, so that the array's domain can be
10093 individually set by the object's initializer. */
10095 if (type
&& typedef_type
10096 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10097 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10098 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10100 /* Detect where we're using a typedef of function type to declare a
10101 function. PARMS will not be set, so we must create it now. */
10103 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10105 tree decls
= NULL_TREE
;
10108 for (args
= TYPE_ARG_TYPES (type
);
10109 args
&& args
!= void_list_node
;
10110 args
= TREE_CHAIN (args
))
10112 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10114 DECL_CHAIN (decl
) = decls
;
10118 parms
= nreverse (decls
);
10120 if (decl_context
!= TYPENAME
)
10122 /* A cv-qualifier-seq shall only be part of the function type
10123 for a non-static member function. [8.3.5/4 dcl.fct] */
10124 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
10125 && (current_class_type
== NULL_TREE
|| staticp
) )
10128 ? G_("qualified function types cannot be used to "
10129 "declare static member functions")
10130 : G_("qualified function types cannot be used to "
10131 "declare free functions"));
10132 type
= TYPE_MAIN_VARIANT (type
);
10135 /* The qualifiers on the function type become the qualifiers on
10136 the non-static member function. */
10137 memfn_quals
|= type_memfn_quals (type
);
10138 type_quals
= TYPE_UNQUALIFIED
;
10142 /* If this is a type name (such as, in a cast or sizeof),
10143 compute the type and return it now. */
10145 if (decl_context
== TYPENAME
)
10147 /* Note that the grammar rejects storage classes
10148 in typenames, fields or parameters. */
10149 if (type_quals
!= TYPE_UNQUALIFIED
)
10150 type_quals
= TYPE_UNQUALIFIED
;
10152 /* Special case: "friend class foo" looks like a TYPENAME context. */
10155 if (type_quals
!= TYPE_UNQUALIFIED
)
10157 error ("type qualifiers specified for friend class declaration");
10158 type_quals
= TYPE_UNQUALIFIED
;
10162 error ("%<inline%> specified for friend class declaration");
10168 /* Don't allow friend declaration without a class-key. */
10169 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10170 permerror (input_location
, "template parameters cannot be friends");
10171 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10172 permerror (input_location
, "friend declaration requires class-key, "
10173 "i.e. %<friend class %T::%D%>",
10174 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10176 permerror (input_location
, "friend declaration requires class-key, "
10177 "i.e. %<friend %#T%>",
10181 /* Only try to do this stuff if we didn't already give up. */
10182 if (type
!= integer_type_node
)
10184 /* A friendly class? */
10185 if (current_class_type
)
10186 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10187 /*complain=*/true);
10189 error ("trying to make class %qT a friend of global scope",
10192 type
= void_type_node
;
10195 else if (memfn_quals
)
10197 if (ctype
== NULL_TREE
10198 && TREE_CODE (type
) == METHOD_TYPE
)
10199 ctype
= TYPE_METHOD_BASETYPE (type
);
10202 type
= build_memfn_type (type
, ctype
, memfn_quals
);
10203 /* Core issue #547: need to allow this in template type args. */
10204 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10205 type
= apply_memfn_quals (type
, memfn_quals
);
10207 error ("invalid qualifiers on non-member function type");
10212 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10213 && decl_context
!= CATCHPARM
10214 && TREE_CODE (type
) != UNION_TYPE
10217 error ("abstract declarator %qT used as declaration", type
);
10218 return error_mark_node
;
10221 /* Only functions may be declared using an operator-function-id. */
10223 && IDENTIFIER_OPNAME_P (unqualified_id
)
10224 && TREE_CODE (type
) != FUNCTION_TYPE
10225 && TREE_CODE (type
) != METHOD_TYPE
)
10227 error ("declaration of %qD as non-function", unqualified_id
);
10228 return error_mark_node
;
10231 /* We don't check parameter types here because we can emit a better
10232 error message later. */
10233 if (decl_context
!= PARM
)
10235 type
= check_var_type (unqualified_id
, type
);
10236 if (type
== error_mark_node
)
10237 return error_mark_node
;
10240 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10241 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10243 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10245 if (ctype
|| in_namespace
)
10246 error ("cannot use %<::%> in parameter declaration");
10248 if (type_uses_auto (type
))
10250 error ("parameter declared %<auto%>");
10251 type
= error_mark_node
;
10254 /* A parameter declared as an array of T is really a pointer to T.
10255 One declared as a function is really a pointer to a function.
10256 One declared as a member is really a pointer to member. */
10258 if (TREE_CODE (type
) == ARRAY_TYPE
)
10260 /* Transfer const-ness of array into that of type pointed to. */
10261 type
= build_pointer_type (TREE_TYPE (type
));
10262 type_quals
= TYPE_UNQUALIFIED
;
10264 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10265 type
= build_pointer_type (type
);
10268 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10269 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10271 cp_cv_quals real_quals
= memfn_quals
;
10272 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10273 real_quals
|= TYPE_QUAL_CONST
;
10274 type
= build_memfn_type (type
, ctype
, real_quals
);
10280 if (decl_context
== PARM
)
10282 decl
= cp_build_parm_decl (unqualified_id
, type
);
10284 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10285 memfn_quals
!= TYPE_UNQUALIFIED
,
10286 inlinep
, friendp
, raises
!= NULL_TREE
);
10288 else if (decl_context
== FIELD
)
10290 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10291 && type_uses_auto (type
))
10293 error ("non-static data member declared %<auto%>");
10294 type
= error_mark_node
;
10297 /* The C99 flexible array extension. */
10298 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10299 && TYPE_DOMAIN (type
) == NULL_TREE
)
10301 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10302 tf_warning_or_error
);
10303 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10306 if (type
== error_mark_node
)
10308 /* Happens when declaring arrays of sizes which
10309 are error_mark_node, for example. */
10312 else if (in_namespace
&& !friendp
)
10314 /* Something like struct S { int N::j; }; */
10315 error ("invalid use of %<::%>");
10316 return error_mark_node
;
10318 else if (TREE_CODE (type
) == FUNCTION_TYPE
10319 || TREE_CODE (type
) == METHOD_TYPE
)
10322 tree function_context
;
10326 /* This should never happen in pure C++ (the check
10327 could be an assert). It could happen in
10328 Objective-C++ if someone writes invalid code that
10329 uses a function declaration for an instance
10330 variable or property (instance variables and
10331 properties are parsed as FIELD_DECLs, but they are
10332 part of an Objective-C class, not a C++ class).
10333 That code is invalid and is caught by this
10337 error ("declaration of function %qD in invalid context",
10339 return error_mark_node
;
10342 /* ``A union may [ ... ] not [ have ] virtual functions.''
10344 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10346 error ("function %qD declared virtual inside a union",
10348 return error_mark_node
;
10351 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10355 error ("%qD cannot be declared virtual, since it "
10356 "is always static",
10363 /* Check that the name used for a destructor makes sense. */
10364 if (sfk
== sfk_destructor
)
10366 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10370 gcc_assert (friendp
);
10371 error ("expected qualified name in friend declaration "
10372 "for destructor %qD", uqname
);
10373 return error_mark_node
;
10376 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10378 error ("declaration of %qD as member of %qT",
10380 return error_mark_node
;
10384 error ("a destructor cannot be %<constexpr%>");
10385 return error_mark_node
;
10388 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10390 error ("expected qualified name in friend declaration "
10391 "for constructor %qD",
10392 id_declarator
->u
.id
.unqualified_name
);
10393 return error_mark_node
;
10396 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10397 function_context
= (ctype
!= NULL_TREE
) ?
10398 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10399 publicp
= (! friendp
|| ! staticp
)
10400 && function_context
== NULL_TREE
;
10401 decl
= grokfndecl (ctype
, type
,
10402 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10403 ? unqualified_id
: dname
,
10406 virtualp
, flags
, memfn_quals
, raises
,
10407 friendp
? -1 : 0, friendp
, publicp
,
10408 inlinep
| (2 * constexpr_p
),
10410 funcdef_flag
, template_count
, in_namespace
,
10411 attrlist
, declarator
->id_loc
);
10412 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10413 if (decl
== NULL_TREE
)
10414 return error_mark_node
;
10416 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10417 /* The decl and setting of decl_attr is also turned off. */
10418 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10421 /* [class.conv.ctor]
10423 A constructor declared without the function-specifier
10424 explicit that can be called with a single parameter
10425 specifies a conversion from the type of its first
10426 parameter to the type of its class. Such a constructor
10427 is called a converting constructor. */
10428 if (explicitp
== 2)
10429 DECL_NONCONVERTING_P (decl
) = 1;
10431 else if (!staticp
&& !dependent_type_p (type
)
10432 && !COMPLETE_TYPE_P (complete_type (type
))
10433 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10435 if (unqualified_id
)
10436 error ("field %qD has incomplete type", unqualified_id
);
10438 error ("name %qT has incomplete type", type
);
10440 /* If we're instantiating a template, tell them which
10441 instantiation made the field's type be incomplete. */
10442 if (current_class_type
10443 && TYPE_NAME (current_class_type
)
10444 && IDENTIFIER_TEMPLATE (current_class_name
)
10446 && declspecs
->type
== type
)
10447 error (" in instantiation of template %qT",
10448 current_class_type
);
10450 return error_mark_node
;
10456 error ("%qE is neither function nor member function; "
10457 "cannot be declared friend", unqualified_id
);
10465 /* Friends are treated specially. */
10466 if (ctype
== current_class_type
)
10467 ; /* We already issued a permerror. */
10468 else if (decl
&& DECL_NAME (decl
))
10470 if (template_class_depth (current_class_type
) == 0)
10472 decl
= check_explicit_specialization
10473 (unqualified_id
, decl
, template_count
,
10474 2 * funcdef_flag
+ 4);
10475 if (decl
== error_mark_node
)
10476 return error_mark_node
;
10479 decl
= do_friend (ctype
, unqualified_id
, decl
,
10485 return error_mark_node
;
10488 /* Structure field. It may not be a function, except for C++. */
10490 if (decl
== NULL_TREE
)
10494 /* C++ allows static class members. All other work
10495 for this is done by grokfield. */
10496 decl
= build_lang_decl_loc (declarator
->id_loc
,
10497 VAR_DECL
, unqualified_id
, type
);
10498 set_linkage_for_static_data_member (decl
);
10499 /* Even if there is an in-class initialization, DECL
10500 is considered undefined until an out-of-class
10501 definition is provided. */
10502 DECL_EXTERNAL (decl
) = 1;
10506 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10507 if (declspecs
->gnu_thread_keyword_p
)
10508 DECL_GNU_TLS_P (decl
) = true;
10511 if (constexpr_p
&& !initialized
)
10513 error ("constexpr static data member %qD must have an "
10514 "initializer", decl
);
10515 constexpr_p
= false;
10522 error ("non-static data member %qE declared %<constexpr%>",
10524 constexpr_p
= false;
10526 decl
= build_decl (input_location
,
10527 FIELD_DECL
, unqualified_id
, type
);
10528 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10529 if (bitfield
&& !unqualified_id
)
10530 TREE_NO_WARNING (decl
) = 1;
10532 if (storage_class
== sc_mutable
)
10534 DECL_MUTABLE_P (decl
) = 1;
10535 storage_class
= sc_none
;
10540 /* An attempt is being made to initialize a non-static
10541 member. This is new in C++11. */
10542 maybe_warn_cpp0x (CPP0X_NSDMI
);
10544 /* If this has been parsed with static storage class, but
10545 errors forced staticp to be cleared, ensure NSDMI is
10547 if (declspecs
->storage_class
== sc_static
)
10548 DECL_INITIAL (decl
) = error_mark_node
;
10552 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10553 memfn_quals
!= TYPE_UNQUALIFIED
,
10554 inlinep
, friendp
, raises
!= NULL_TREE
);
10557 else if (TREE_CODE (type
) == FUNCTION_TYPE
10558 || TREE_CODE (type
) == METHOD_TYPE
)
10560 tree original_name
;
10563 if (!unqualified_id
)
10564 return error_mark_node
;
10566 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10567 original_name
= dname
;
10569 original_name
= unqualified_id
;
10571 if (storage_class
== sc_auto
)
10572 error ("storage class %<auto%> invalid for function %qs", name
);
10573 else if (storage_class
== sc_register
)
10574 error ("storage class %<register%> invalid for function %qs", name
);
10577 if (declspecs
->gnu_thread_keyword_p
)
10578 error ("storage class %<__thread%> invalid for function %qs",
10581 error ("storage class %<thread_local%> invalid for function %qs",
10585 if (virt_specifiers
)
10586 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10587 /* Function declaration not at top level.
10588 Storage classes other than `extern' are not allowed
10589 and `extern' makes no difference. */
10590 if (! toplevel_bindings_p ()
10591 && (storage_class
== sc_static
10592 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10595 if (storage_class
== sc_static
)
10596 pedwarn (input_location
, OPT_Wpedantic
,
10597 "%<static%> specified invalid for function %qs "
10598 "declared out of global scope", name
);
10600 pedwarn (input_location
, OPT_Wpedantic
,
10601 "%<inline%> specifier invalid for function %qs "
10602 "declared out of global scope", name
);
10605 if (ctype
== NULL_TREE
)
10609 error ("virtual non-class function %qs", name
);
10612 else if (sfk
== sfk_constructor
10613 || sfk
== sfk_destructor
)
10615 error (funcdef_flag
10616 ? G_("%qs defined in a non-class scope")
10617 : G_("%qs declared in a non-class scope"), name
);
10622 /* Record presence of `static'. */
10623 publicp
= (ctype
!= NULL_TREE
10624 || storage_class
== sc_extern
10625 || storage_class
!= sc_static
);
10627 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10628 virtualp
, flags
, memfn_quals
, raises
,
10630 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10632 template_count
, in_namespace
, attrlist
,
10633 declarator
->id_loc
);
10634 if (decl
== NULL_TREE
)
10635 return error_mark_node
;
10639 int invalid_static
= 0;
10641 /* Don't allow a static member function in a class, and forbid
10642 declaring main to be static. */
10643 if (TREE_CODE (type
) == METHOD_TYPE
)
10645 permerror (input_location
, "cannot declare member function %qD to have "
10646 "static linkage", decl
);
10647 invalid_static
= 1;
10649 else if (current_function_decl
)
10651 /* FIXME need arm citation */
10652 error ("cannot declare static function inside another function");
10653 invalid_static
= 1;
10656 if (invalid_static
)
10659 storage_class
= sc_none
;
10665 /* It's a variable. */
10667 /* An uninitialized decl with `extern' is a reference. */
10668 decl
= grokvardecl (type
, unqualified_id
,
10671 (type_quals
& TYPE_QUAL_CONST
) != 0,
10672 ctype
? ctype
: in_namespace
);
10673 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10674 memfn_quals
!= TYPE_UNQUALIFIED
,
10675 inlinep
, friendp
, raises
!= NULL_TREE
);
10679 DECL_CONTEXT (decl
) = ctype
;
10682 permerror (input_location
, "%<static%> may not be used when defining "
10683 "(as opposed to declaring) a static data member");
10685 storage_class
= sc_none
;
10687 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10689 error ("static member %qD declared %<register%>", decl
);
10690 storage_class
= sc_none
;
10692 if (storage_class
== sc_extern
&& pedantic
)
10694 pedwarn (input_location
, OPT_Wpedantic
,
10695 "cannot explicitly declare member %q#D to have "
10696 "extern linkage", decl
);
10697 storage_class
= sc_none
;
10700 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10702 error ("declaration of constexpr variable %qD is not a definition",
10704 constexpr_p
= false;
10708 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10710 if (toplevel_bindings_p ())
10712 /* It's common practice (and completely valid) to have a const
10713 be initialized and declared extern. */
10714 if (!(type_quals
& TYPE_QUAL_CONST
))
10715 warning (0, "%qs initialized and declared %<extern%>", name
);
10719 error ("%qs has both %<extern%> and initializer", name
);
10720 return error_mark_node
;
10724 /* Record `register' declaration for warnings on &
10725 and in case doing stupid register allocation. */
10727 if (storage_class
== sc_register
)
10728 DECL_REGISTER (decl
) = 1;
10729 else if (storage_class
== sc_extern
)
10730 DECL_THIS_EXTERN (decl
) = 1;
10731 else if (storage_class
== sc_static
)
10732 DECL_THIS_STATIC (decl
) = 1;
10734 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10735 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10736 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10738 /* Record constancy and volatility on the DECL itself . There's
10739 no need to do this when processing a template; we'll do this
10740 for the instantiated declaration based on the type of DECL. */
10741 if (!processing_template_decl
)
10742 cp_apply_type_quals_to_decl (type_quals
, decl
);
10748 /* Subroutine of start_function. Ensure that each of the parameter
10749 types (as listed in PARMS) is complete, as is required for a
10750 function definition. */
10753 require_complete_types_for_parms (tree parms
)
10755 for (; parms
; parms
= DECL_CHAIN (parms
))
10757 if (dependent_type_p (TREE_TYPE (parms
)))
10759 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10760 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10762 relayout_decl (parms
);
10763 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10766 /* grokparms or complete_type_or_else will have already issued
10768 TREE_TYPE (parms
) = error_mark_node
;
10772 /* Returns nonzero if T is a local variable. */
10775 local_variable_p (const_tree t
)
10777 if ((TREE_CODE (t
) == VAR_DECL
10778 /* A VAR_DECL with a context that is a _TYPE is a static data
10780 && !TYPE_P (CP_DECL_CONTEXT (t
))
10781 /* Any other non-local variable must be at namespace scope. */
10782 && !DECL_NAMESPACE_SCOPE_P (t
))
10783 || (TREE_CODE (t
) == PARM_DECL
))
10789 /* Like local_variable_p, but suitable for use as a tree-walking
10793 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10796 /* Check DECL_NAME to avoid including temporaries. We don't check
10797 DECL_ARTIFICIAL because we do want to complain about 'this'. */
10798 if (local_variable_p (*tp
) && DECL_NAME (*tp
))
10800 else if (TYPE_P (*tp
))
10801 *walk_subtrees
= 0;
10806 /* Check that ARG, which is a default-argument expression for a
10807 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10808 something goes wrong. DECL may also be a _TYPE node, rather than a
10809 DECL, if there is no DECL available. */
10812 check_default_argument (tree decl
, tree arg
)
10817 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10818 /* We get a DEFAULT_ARG when looking at an in-class declaration
10819 with a default argument. Ignore the argument for now; we'll
10820 deal with it after the class is complete. */
10829 decl_type
= TREE_TYPE (decl
);
10831 if (arg
== error_mark_node
10832 || decl
== error_mark_node
10833 || TREE_TYPE (arg
) == error_mark_node
10834 || decl_type
== error_mark_node
)
10835 /* Something already went wrong. There's no need to check
10837 return error_mark_node
;
10839 /* [dcl.fct.default]
10841 A default argument expression is implicitly converted to the
10843 ++cp_unevaluated_operand
;
10844 perform_implicit_conversion_flags (decl_type
, arg
, tf_warning_or_error
,
10846 --cp_unevaluated_operand
;
10848 if (warn_zero_as_null_pointer_constant
10849 && c_inhibit_evaluation_warnings
== 0
10850 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10851 && null_ptr_cst_p (arg
)
10852 && !NULLPTR_TYPE_P (TREE_TYPE (arg
)))
10854 warning (OPT_Wzero_as_null_pointer_constant
,
10855 "zero as null pointer constant");
10856 return nullptr_node
;
10859 /* [dcl.fct.default]
10861 Local variables shall not be used in default argument
10864 The keyword `this' shall not be used in a default argument of a
10865 member function. */
10866 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10869 if (DECL_NAME (var
) == this_identifier
)
10870 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10872 error ("default argument %qE uses local variable %qD", arg
, var
);
10873 return error_mark_node
;
10880 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10883 type_is_deprecated (tree type
)
10885 enum tree_code code
;
10886 if (TREE_DEPRECATED (type
))
10888 if (TYPE_NAME (type
)
10889 && TREE_DEPRECATED (TYPE_NAME (type
)))
10892 /* Do warn about using typedefs to a deprecated class. */
10893 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10894 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10896 code
= TREE_CODE (type
);
10898 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10899 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10900 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10901 return type_is_deprecated (TREE_TYPE (type
));
10903 if (TYPE_PTRMEMFUNC_P (type
))
10904 return type_is_deprecated
10905 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10910 /* Decode the list of parameter types for a function type.
10911 Given the list of things declared inside the parens,
10912 return a list of types.
10914 If this parameter does not end with an ellipsis, we append
10917 *PARMS is set to the chain of PARM_DECLs created. */
10920 grokparms (tree parmlist
, tree
*parms
)
10922 tree result
= NULL_TREE
;
10923 tree decls
= NULL_TREE
;
10927 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10929 tree type
= NULL_TREE
;
10930 tree init
= TREE_PURPOSE (parm
);
10931 tree decl
= TREE_VALUE (parm
);
10932 const char *errmsg
;
10934 if (parm
== void_list_node
)
10937 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10940 type
= TREE_TYPE (decl
);
10941 if (VOID_TYPE_P (type
))
10943 if (same_type_p (type
, void_type_node
)
10944 && DECL_SELF_REFERENCE_P (type
)
10945 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10946 /* this is a parmlist of `(void)', which is ok. */
10948 cxx_incomplete_type_error (decl
, type
);
10949 /* It's not a good idea to actually create parameters of
10950 type `void'; other parts of the compiler assume that a
10951 void type terminates the parameter list. */
10952 type
= error_mark_node
;
10953 TREE_TYPE (decl
) = error_mark_node
;
10956 if (type
!= error_mark_node
10957 && TYPE_FOR_JAVA (type
)
10958 && MAYBE_CLASS_TYPE_P (type
))
10960 error ("parameter %qD has Java class type", decl
);
10961 type
= error_mark_node
;
10962 TREE_TYPE (decl
) = error_mark_node
;
10966 if (type
!= error_mark_node
10967 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10970 type
= error_mark_node
;
10971 TREE_TYPE (decl
) = error_mark_node
;
10974 if (type
!= error_mark_node
)
10976 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10978 tree deptype
= type_is_deprecated (type
);
10980 warn_deprecated_use (deptype
, NULL_TREE
);
10983 /* Top-level qualifiers on the parameters are
10984 ignored for function types. */
10985 type
= cp_build_qualified_type (type
, 0);
10986 if (TREE_CODE (type
) == METHOD_TYPE
)
10988 error ("parameter %qD invalidly declared method type", decl
);
10989 type
= build_pointer_type (type
);
10990 TREE_TYPE (decl
) = type
;
10992 else if (abstract_virtuals_error (decl
, type
))
10993 any_error
= 1; /* Seems like a good idea. */
10994 else if (POINTER_TYPE_P (type
))
10996 /* [dcl.fct]/6, parameter types cannot contain pointers
10997 (references) to arrays of unknown bound. */
10998 tree t
= TREE_TYPE (type
);
10999 int ptr
= TYPE_PTR_P (type
);
11003 if (TYPE_PTR_P (t
))
11005 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11007 else if (!TYPE_DOMAIN (t
))
11011 if (TREE_CODE (t
) == ARRAY_TYPE
)
11013 ? G_("parameter %qD includes pointer to array of "
11014 "unknown bound %qT")
11015 : G_("parameter %qD includes reference to array of "
11016 "unknown bound %qT"),
11022 else if (init
&& !processing_template_decl
)
11023 init
= check_default_argument (decl
, init
);
11026 DECL_CHAIN (decl
) = decls
;
11028 result
= tree_cons (init
, type
, result
);
11030 decls
= nreverse (decls
);
11031 result
= nreverse (result
);
11033 result
= chainon (result
, void_list_node
);
11040 /* D is a constructor or overloaded `operator='.
11042 Let T be the class in which D is declared. Then, this function
11045 -1 if D's is an ill-formed constructor or copy assignment operator
11046 whose first parameter is of type `T'.
11047 0 if D is not a copy constructor or copy assignment
11049 1 if D is a copy constructor or copy assignment operator whose
11050 first parameter is a reference to non-const qualified T.
11051 2 if D is a copy constructor or copy assignment operator whose
11052 first parameter is a reference to const qualified T.
11054 This function can be used as a predicate. Positive values indicate
11055 a copy constructor and nonzero values indicate a copy assignment
11059 copy_fn_p (const_tree d
)
11065 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11067 if (TREE_CODE (d
) == TEMPLATE_DECL
11068 || (DECL_TEMPLATE_INFO (d
)
11069 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11070 /* Instantiations of template member functions are never copy
11071 functions. Note that member functions of templated classes are
11072 represented as template functions internally, and we must
11073 accept those as copy functions. */
11076 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11080 arg_type
= TREE_VALUE (args
);
11081 if (arg_type
== error_mark_node
)
11084 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11086 /* Pass by value copy assignment operator. */
11089 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11090 && !TYPE_REF_IS_RVALUE (arg_type
)
11091 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11093 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11099 args
= TREE_CHAIN (args
);
11101 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11102 /* There are more non-optional args. */
11108 /* D is a constructor or overloaded `operator='.
11110 Let T be the class in which D is declared. Then, this function
11111 returns true when D is a move constructor or move assignment
11112 operator, false otherwise. */
11115 move_fn_p (const_tree d
)
11117 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11119 if (cxx_dialect
== cxx98
)
11120 /* There are no move constructors if we are in C++98 mode. */
11123 if (TREE_CODE (d
) == TEMPLATE_DECL
11124 || (DECL_TEMPLATE_INFO (d
)
11125 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11126 /* Instantiations of template member functions are never move
11127 functions. Note that member functions of templated classes are
11128 represented as template functions internally, and we must
11129 accept those as move functions. */
11132 return move_signature_fn_p (d
);
11135 /* D is a constructor or overloaded `operator='.
11137 Then, this function returns true when D has the same signature as a move
11138 constructor or move assignment operator (because either it is such a
11139 ctor/op= or it is a template specialization with the same signature),
11140 false otherwise. */
11143 move_signature_fn_p (const_tree d
)
11147 bool result
= false;
11149 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11153 arg_type
= TREE_VALUE (args
);
11154 if (arg_type
== error_mark_node
)
11157 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11158 && TYPE_REF_IS_RVALUE (arg_type
)
11159 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11163 args
= TREE_CHAIN (args
);
11165 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11166 /* There are more non-optional args. */
11172 /* Remember any special properties of member function DECL. */
11175 grok_special_member_properties (tree decl
)
11179 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11182 class_type
= DECL_CONTEXT (decl
);
11183 if (DECL_CONSTRUCTOR_P (decl
))
11185 int ctor
= copy_fn_p (decl
);
11187 if (!DECL_ARTIFICIAL (decl
))
11188 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11194 A non-template constructor for class X is a copy
11195 constructor if its first parameter is of type X&, const
11196 X&, volatile X& or const volatile X&, and either there
11197 are no other parameters or else all other parameters have
11198 default arguments. */
11199 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11200 if (user_provided_p (decl
))
11201 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11203 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11205 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11207 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11208 if (user_provided_p (decl
))
11209 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11211 else if (move_fn_p (decl
) && user_provided_p (decl
))
11212 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11213 else if (is_list_ctor (decl
))
11214 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11216 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11217 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11218 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11220 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11224 A non-template assignment operator for class X is a copy
11225 assignment operator if its parameter is of type X, X&, const
11226 X&, volatile X& or const volatile X&. */
11228 int assop
= copy_fn_p (decl
);
11232 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11233 if (user_provided_p (decl
))
11234 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11236 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11238 else if (move_fn_p (decl
) && user_provided_p (decl
))
11239 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11241 /* Destructors are handled in check_methods. */
11244 /* Check a constructor DECL has the correct form. Complains
11245 if the class has a constructor of the form X(X). */
11248 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11250 int ctor_parm
= copy_fn_p (decl
);
11256 A declaration of a constructor for a class X is ill-formed if
11257 its first parameter is of type (optionally cv-qualified) X
11258 and either there are no other parameters or else all other
11259 parameters have default arguments.
11261 We *don't* complain about member template instantiations that
11262 have this form, though; they can occur as we try to decide
11263 what constructor to use during overload resolution. Since
11264 overload resolution will never prefer such a constructor to
11265 the non-template copy constructor (which is either explicitly
11266 or implicitly defined), there's no need to worry about their
11267 existence. Theoretically, they should never even be
11268 instantiated, but that's hard to forestall. */
11269 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11277 /* An operator with this code is unary, but can also be binary. */
11280 ambi_op_p (enum tree_code code
)
11282 return (code
== INDIRECT_REF
11283 || code
== ADDR_EXPR
11284 || code
== UNARY_PLUS_EXPR
11285 || code
== NEGATE_EXPR
11286 || code
== PREINCREMENT_EXPR
11287 || code
== PREDECREMENT_EXPR
);
11290 /* An operator with this name can only be unary. */
11293 unary_op_p (enum tree_code code
)
11295 return (code
== TRUTH_NOT_EXPR
11296 || code
== BIT_NOT_EXPR
11297 || code
== COMPONENT_REF
11298 || code
== TYPE_EXPR
);
11301 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11302 errors are issued for invalid declarations. */
11305 grok_op_properties (tree decl
, bool complain
)
11307 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11309 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11310 tree name
= DECL_NAME (decl
);
11311 enum tree_code operator_code
;
11316 /* Count the number of arguments and check for ellipsis. */
11317 for (argtype
= argtypes
, arity
= 0;
11318 argtype
&& argtype
!= void_list_node
;
11319 argtype
= TREE_CHAIN (argtype
))
11321 ellipsis_p
= !argtype
;
11323 class_type
= DECL_CONTEXT (decl
);
11324 if (class_type
&& !CLASS_TYPE_P (class_type
))
11325 class_type
= NULL_TREE
;
11327 if (DECL_CONV_FN_P (decl
))
11328 operator_code
= TYPE_EXPR
;
11332 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11333 if (ansi_opname (CODE) == name) \
11335 operator_code = (CODE); \
11338 else if (ansi_assopname (CODE) == name) \
11340 operator_code = (CODE); \
11341 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11345 #include "operators.def"
11346 #undef DEF_OPERATOR
11348 gcc_unreachable ();
11351 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11352 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11355 switch (operator_code
)
11358 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11362 TYPE_GETS_DELETE (class_type
) |= 1;
11366 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11369 case VEC_DELETE_EXPR
:
11370 TYPE_GETS_DELETE (class_type
) |= 2;
11377 /* [basic.std.dynamic.allocation]/1:
11379 A program is ill-formed if an allocation function is declared
11380 in a namespace scope other than global scope or declared static
11383 The same also holds true for deallocation functions. */
11384 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11385 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11387 if (DECL_NAMESPACE_SCOPE_P (decl
))
11389 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11391 error ("%qD may not be declared within a namespace", decl
);
11394 else if (!TREE_PUBLIC (decl
))
11396 error ("%qD may not be declared as static", decl
);
11402 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11404 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11405 DECL_IS_OPERATOR_NEW (decl
) = 1;
11407 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11408 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11411 /* An operator function must either be a non-static member function
11412 or have at least one parameter of a class, a reference to a class,
11413 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11414 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11416 if (operator_code
== TYPE_EXPR
11417 || operator_code
== CALL_EXPR
11418 || operator_code
== COMPONENT_REF
11419 || operator_code
== ARRAY_REF
11420 || operator_code
== NOP_EXPR
)
11422 error ("%qD must be a nonstatic member function", decl
);
11429 if (DECL_STATIC_FUNCTION_P (decl
))
11431 error ("%qD must be either a non-static member "
11432 "function or a non-member function", decl
);
11436 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11438 tree arg
= non_reference (TREE_VALUE (p
));
11439 if (arg
== error_mark_node
)
11442 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11443 because these checks are performed even on
11444 template functions. */
11445 if (MAYBE_CLASS_TYPE_P (arg
)
11446 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11450 if (!p
|| p
== void_list_node
)
11453 error ("%qD must have an argument of class or "
11454 "enumerated type", decl
);
11460 /* There are no restrictions on the arguments to an overloaded
11462 if (operator_code
== CALL_EXPR
)
11465 /* Warn about conversion operators that will never be used. */
11466 if (IDENTIFIER_TYPENAME_P (name
)
11467 && ! DECL_TEMPLATE_INFO (decl
)
11469 /* Warn only declaring the function; there is no need to
11470 warn again about out-of-class definitions. */
11471 && class_type
== current_class_type
)
11473 tree t
= TREE_TYPE (name
);
11474 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11477 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11479 if (TREE_CODE (t
) == VOID_TYPE
)
11480 warning (OPT_Wconversion
,
11482 ? G_("conversion to a reference to void "
11483 "will never use a type conversion operator")
11484 : G_("conversion to void "
11485 "will never use a type conversion operator"));
11486 else if (class_type
)
11488 if (t
== class_type
)
11489 warning (OPT_Wconversion
,
11491 ? G_("conversion to a reference to the same type "
11492 "will never use a type conversion operator")
11493 : G_("conversion to the same type "
11494 "will never use a type conversion operator"));
11495 /* Don't force t to be complete here. */
11496 else if (MAYBE_CLASS_TYPE_P (t
)
11497 && COMPLETE_TYPE_P (t
)
11498 && DERIVED_FROM_P (t
, class_type
))
11499 warning (OPT_Wconversion
,
11501 ? G_("conversion to a reference to a base class "
11502 "will never use a type conversion operator")
11503 : G_("conversion to a base class "
11504 "will never use a type conversion operator"));
11509 if (operator_code
== COND_EXPR
)
11512 error ("ISO C++ prohibits overloading operator ?:");
11515 else if (ellipsis_p
)
11517 error ("%qD must not have variable number of arguments", decl
);
11520 else if (ambi_op_p (operator_code
))
11523 /* We pick the one-argument operator codes by default, so
11524 we don't have to change anything. */
11526 else if (arity
== 2)
11528 /* If we thought this was a unary operator, we now know
11529 it to be a binary operator. */
11530 switch (operator_code
)
11533 operator_code
= MULT_EXPR
;
11537 operator_code
= BIT_AND_EXPR
;
11540 case UNARY_PLUS_EXPR
:
11541 operator_code
= PLUS_EXPR
;
11545 operator_code
= MINUS_EXPR
;
11548 case PREINCREMENT_EXPR
:
11549 operator_code
= POSTINCREMENT_EXPR
;
11552 case PREDECREMENT_EXPR
:
11553 operator_code
= POSTDECREMENT_EXPR
;
11557 gcc_unreachable ();
11560 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11562 if ((operator_code
== POSTINCREMENT_EXPR
11563 || operator_code
== POSTDECREMENT_EXPR
)
11564 && ! processing_template_decl
11565 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11568 error ("postfix %qD must take %<int%> as its argument",
11571 error ("postfix %qD must take %<int%> as its second "
11579 error ("%qD must take either zero or one argument", decl
);
11581 error ("%qD must take either one or two arguments", decl
);
11585 /* More Effective C++ rule 6. */
11587 && (operator_code
== POSTINCREMENT_EXPR
11588 || operator_code
== POSTDECREMENT_EXPR
11589 || operator_code
== PREINCREMENT_EXPR
11590 || operator_code
== PREDECREMENT_EXPR
))
11592 tree arg
= TREE_VALUE (argtypes
);
11593 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11594 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11595 arg
= TREE_TYPE (arg
);
11596 arg
= TYPE_MAIN_VARIANT (arg
);
11597 if (operator_code
== PREINCREMENT_EXPR
11598 || operator_code
== PREDECREMENT_EXPR
)
11600 if (TREE_CODE (ret
) != REFERENCE_TYPE
11601 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11603 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11604 build_reference_type (arg
));
11608 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11609 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11613 else if (unary_op_p (operator_code
))
11618 error ("%qD must take %<void%>", decl
);
11620 error ("%qD must take exactly one argument", decl
);
11624 else /* if (binary_op_p (operator_code)) */
11629 error ("%qD must take exactly one argument", decl
);
11631 error ("%qD must take exactly two arguments", decl
);
11635 /* More Effective C++ rule 7. */
11637 && (operator_code
== TRUTH_ANDIF_EXPR
11638 || operator_code
== TRUTH_ORIF_EXPR
11639 || operator_code
== COMPOUND_EXPR
))
11640 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11644 /* Effective C++ rule 23. */
11647 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11648 && (operator_code
== PLUS_EXPR
11649 || operator_code
== MINUS_EXPR
11650 || operator_code
== TRUNC_DIV_EXPR
11651 || operator_code
== MULT_EXPR
11652 || operator_code
== TRUNC_MOD_EXPR
)
11653 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11654 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11656 /* [over.oper]/8 */
11657 for (; argtypes
&& argtypes
!= void_list_node
;
11658 argtypes
= TREE_CHAIN (argtypes
))
11659 if (TREE_PURPOSE (argtypes
))
11661 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11662 if (operator_code
== POSTINCREMENT_EXPR
11663 || operator_code
== POSTDECREMENT_EXPR
)
11665 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11670 error ("%qD cannot have default arguments", decl
);
11678 /* Return a string giving the keyword associate with CODE. */
11680 static const char *
11681 tag_name (enum tag_types code
)
11693 case typename_type
:
11696 gcc_unreachable ();
11700 /* Name lookup in an elaborated-type-specifier (after the keyword
11701 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11702 elaborated-type-specifier is invalid, issue a diagnostic and return
11703 error_mark_node; otherwise, return the *_TYPE to which it referred.
11704 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11707 check_elaborated_type_specifier (enum tag_types tag_code
,
11709 bool allow_template_p
)
11713 if (decl
== error_mark_node
)
11714 return error_mark_node
;
11718 struct S { struct S *p; };
11720 name lookup will find the TYPE_DECL for the implicit "S::S"
11721 typedef. Adjust for that here. */
11722 if (DECL_SELF_REFERENCE_P (decl
))
11723 decl
= TYPE_NAME (TREE_TYPE (decl
));
11725 type
= TREE_TYPE (decl
);
11727 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11728 is false for this case as well. */
11729 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11731 error ("using template type parameter %qT after %qs",
11732 type
, tag_name (tag_code
));
11733 return error_mark_node
;
11735 /* Accept template template parameters. */
11736 else if (allow_template_p
11737 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11738 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11742 If the identifier resolves to a typedef-name or the
11743 simple-template-id resolves to an alias template
11744 specialization, the elaborated-type-specifier is ill-formed.
11746 In other words, the only legitimate declaration to use in the
11747 elaborated type specifier is the implicit typedef created when
11748 the type is declared. */
11749 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11750 && !DECL_SELF_REFERENCE_P (decl
)
11751 && tag_code
!= typename_type
)
11753 if (alias_template_specialization_p (type
))
11754 error ("using alias template specialization %qT after %qs",
11755 type
, tag_name (tag_code
));
11757 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11758 inform (DECL_SOURCE_LOCATION (decl
),
11759 "%qD has a previous declaration here", decl
);
11760 return error_mark_node
;
11762 else if (TREE_CODE (type
) != RECORD_TYPE
11763 && TREE_CODE (type
) != UNION_TYPE
11764 && tag_code
!= enum_type
11765 && tag_code
!= typename_type
)
11767 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11768 error ("%q+T has a previous declaration here", type
);
11769 return error_mark_node
;
11771 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11772 && tag_code
== enum_type
)
11774 error ("%qT referred to as enum", type
);
11775 error ("%q+T has a previous declaration here", type
);
11776 return error_mark_node
;
11778 else if (!allow_template_p
11779 && TREE_CODE (type
) == RECORD_TYPE
11780 && CLASSTYPE_IS_TEMPLATE (type
))
11782 /* If a class template appears as elaborated type specifier
11783 without a template header such as:
11785 template <class T> class C {};
11786 void f(class C); // No template header here
11788 then the required template argument is missing. */
11789 error ("template argument required for %<%s %T%>",
11790 tag_name (tag_code
),
11791 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11792 return error_mark_node
;
11798 /* Lookup NAME in elaborate type specifier in scope according to
11799 SCOPE and issue diagnostics if necessary.
11800 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11801 found, and ERROR_MARK_NODE for type error. */
11804 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11805 tag_scope scope
, bool template_header_p
)
11809 if (scope
== ts_global
)
11811 /* First try ordinary name lookup, ignoring hidden class name
11812 injected via friend declaration. */
11813 decl
= lookup_name_prefer_type (name
, 2);
11814 /* If that fails, the name will be placed in the smallest
11815 non-class, non-function-prototype scope according to 3.3.1/5.
11816 We may already have a hidden name declared as friend in this
11817 scope. So lookup again but not ignoring hidden names.
11818 If we find one, that name will be made visible rather than
11819 creating a new tag. */
11821 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11824 decl
= lookup_type_scope (name
, scope
);
11827 && (DECL_CLASS_TEMPLATE_P (decl
)
11828 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11829 decl
= DECL_TEMPLATE_RESULT (decl
);
11831 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11833 /* Look for invalid nested type:
11837 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11839 error ("%qD has the same name as the class in which it is "
11842 return error_mark_node
;
11845 /* Two cases we need to consider when deciding if a class
11846 template is allowed as an elaborated type specifier:
11847 1. It is a self reference to its own class.
11848 2. It comes with a template header.
11852 template <class T> class C {
11853 class C *c1; // DECL_SELF_REFERENCE_P is true
11856 template <class U> class C; // template_header_p is true
11857 template <class T> class C<T>::D {
11858 class C *c2; // DECL_SELF_REFERENCE_P is true
11861 t
= check_elaborated_type_specifier (tag_code
,
11864 | DECL_SELF_REFERENCE_P (decl
));
11867 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11869 error ("reference to %qD is ambiguous", name
);
11870 print_candidates (decl
);
11871 return error_mark_node
;
11877 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11878 Define the tag as a forward-reference if it is not defined.
11880 If a declaration is given, process it here, and report an error if
11881 multiple declarations are not identical.
11883 SCOPE is TS_CURRENT when this is also a definition. Only look in
11884 the current frame for the name (since C++ allows new names in any
11885 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11886 declaration. Only look beginning from the current scope outward up
11887 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11889 TEMPLATE_HEADER_P is true when this declaration is preceded by
11890 a set of template parameters. */
11893 xref_tag_1 (enum tag_types tag_code
, tree name
,
11894 tag_scope scope
, bool template_header_p
)
11896 enum tree_code code
;
11898 tree context
= NULL_TREE
;
11900 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11906 code
= RECORD_TYPE
;
11912 code
= ENUMERAL_TYPE
;
11915 gcc_unreachable ();
11918 /* In case of anonymous name, xref_tag is only called to
11919 make type node and push name. Name lookup is not required. */
11920 if (ANON_AGGRNAME_P (name
))
11923 t
= lookup_and_check_tag (tag_code
, name
,
11924 scope
, template_header_p
);
11926 if (t
== error_mark_node
)
11927 return error_mark_node
;
11929 if (scope
!= ts_current
&& t
&& current_class_type
11930 && template_class_depth (current_class_type
)
11931 && template_header_p
)
11933 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
11936 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11937 definition of this tag. Since, in addition, we are currently
11938 processing a (member) template declaration of a template
11939 class, we must be very careful; consider:
11946 { template <class V>
11947 friend struct S1; };
11949 Here, the S2::S1 declaration should not be confused with the
11950 outer declaration. In particular, the inner version should
11951 have a template parameter of level 2, not level 1. This
11952 would be particularly important if the member declaration
11955 template <class V = U> friend struct S1;
11957 say, when we should tsubst into `U' when instantiating
11958 S2. On the other hand, when presented with:
11968 we must find the inner binding eventually. We
11969 accomplish this by making sure that the new type we
11970 create to represent this declaration has the right
11972 context
= TYPE_CONTEXT (t
);
11978 /* If no such tag is yet defined, create a forward-reference node
11979 and record it as the "definition".
11980 When a real declaration of this type is found,
11981 the forward-reference will be altered into a real type. */
11982 if (code
== ENUMERAL_TYPE
)
11984 error ("use of enum %q#D without previous declaration", name
);
11985 return error_mark_node
;
11989 t
= make_class_type (code
);
11990 TYPE_CONTEXT (t
) = context
;
11991 t
= pushtag (name
, t
, scope
);
11996 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11998 if (!redeclare_class_template (t
, current_template_parms
))
11999 return error_mark_node
;
12001 else if (!processing_template_decl
12002 && CLASS_TYPE_P (t
)
12003 && CLASSTYPE_IS_TEMPLATE (t
))
12005 error ("redeclaration of %qT as a non-template", t
);
12006 error ("previous declaration %q+D", t
);
12007 return error_mark_node
;
12010 /* Make injected friend class visible. */
12011 if (scope
!= ts_within_enclosing_non_class
12012 && hidden_name_p (TYPE_NAME (t
)))
12014 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12015 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12017 if (TYPE_TEMPLATE_INFO (t
))
12019 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12020 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12028 /* Wrapper for xref_tag_1. */
12031 xref_tag (enum tag_types tag_code
, tree name
,
12032 tag_scope scope
, bool template_header_p
)
12036 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12037 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12038 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12044 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12046 enum tag_types tag_kind
;
12048 if (TREE_CODE (old
) == RECORD_TYPE
)
12049 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12051 tag_kind
= union_type
;
12053 if (id
== NULL_TREE
)
12054 id
= TYPE_IDENTIFIER (old
);
12056 return xref_tag (tag_kind
, id
, scope
, false);
12059 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12060 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12061 access_* node, and the TREE_VALUE is the type of the base-class.
12062 Non-NULL TREE_TYPE indicates virtual inheritance.
12064 Returns true if the binfo hierarchy was successfully created,
12065 false if an error was detected. */
12068 xref_basetypes (tree ref
, tree base_list
)
12071 tree binfo
, base_binfo
;
12072 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12073 unsigned max_bases
= 0; /* Maximum direct bases. */
12075 tree default_access
;
12076 tree igo_prev
; /* Track Inheritance Graph Order. */
12078 if (ref
== error_mark_node
)
12081 /* The base of a derived class is private by default, all others are
12083 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12084 && CLASSTYPE_DECLARED_CLASS (ref
)
12085 ? access_private_node
: access_public_node
);
12087 /* First, make sure that any templates in base-classes are
12088 instantiated. This ensures that if we call ourselves recursively
12089 we do not get confused about which classes are marked and which
12091 basep
= &base_list
;
12094 tree basetype
= TREE_VALUE (*basep
);
12096 /* The dependent_type_p call below should really be dependent_scope_p
12097 so that we give a hard error about using an incomplete type as a
12098 base, but we allow it with a pedwarn for backward
12100 if (processing_template_decl
12101 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12102 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12103 if (!dependent_type_p (basetype
)
12104 && !complete_type_or_else (basetype
, NULL
))
12105 /* An incomplete type. Remove it from the list. */
12106 *basep
= TREE_CHAIN (*basep
);
12110 if (TREE_TYPE (*basep
))
12112 if (CLASS_TYPE_P (basetype
))
12113 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
12114 basep
= &TREE_CHAIN (*basep
);
12118 TYPE_MARKED_P (ref
) = 1;
12120 /* The binfo slot should be empty, unless this is an (ill-formed)
12122 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12124 error ("redefinition of %q#T", ref
);
12128 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12130 binfo
= make_tree_binfo (max_bases
);
12132 TYPE_BINFO (ref
) = binfo
;
12133 BINFO_OFFSET (binfo
) = size_zero_node
;
12134 BINFO_TYPE (binfo
) = ref
;
12136 /* Apply base-class info set up to the variants of this type. */
12137 fixup_type_variants (ref
);
12141 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
12142 /* An aggregate cannot have baseclasses. */
12143 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12145 if (TREE_CODE (ref
) == UNION_TYPE
)
12147 error ("derived union %qT invalid", ref
);
12154 if (TYPE_FOR_JAVA (ref
))
12156 error ("Java class %qT cannot have multiple bases", ref
);
12163 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
12165 if (TYPE_FOR_JAVA (ref
))
12167 error ("Java class %qT cannot have virtual bases", ref
);
12172 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12174 tree access
= TREE_PURPOSE (base_list
);
12175 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12176 tree basetype
= TREE_VALUE (base_list
);
12178 if (access
== access_default_node
)
12179 access
= default_access
;
12181 if (PACK_EXPANSION_P (basetype
))
12182 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12183 if (TREE_CODE (basetype
) == TYPE_DECL
)
12184 basetype
= TREE_TYPE (basetype
);
12185 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12187 error ("base type %qT fails to be a struct or class type",
12192 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12193 TYPE_FOR_JAVA (ref
) = 1;
12195 base_binfo
= NULL_TREE
;
12196 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12198 base_binfo
= TYPE_BINFO (basetype
);
12199 /* The original basetype could have been a typedef'd type. */
12200 basetype
= BINFO_TYPE (base_binfo
);
12202 /* Inherit flags from the base. */
12203 TYPE_HAS_NEW_OPERATOR (ref
)
12204 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12205 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12206 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12207 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12208 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12209 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12210 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12211 CLASSTYPE_REPEATED_BASE_P (ref
)
12212 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12215 /* We must do this test after we've seen through a typedef
12217 if (TYPE_MARKED_P (basetype
))
12219 if (basetype
== ref
)
12220 error ("recursive type %qT undefined", basetype
);
12222 error ("duplicate base type %qT invalid", basetype
);
12226 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12227 /* Regenerate the pack expansion for the bases. */
12228 basetype
= make_pack_expansion (basetype
);
12230 TYPE_MARKED_P (basetype
) = 1;
12232 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12233 &igo_prev
, via_virtual
);
12234 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12235 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12237 BINFO_BASE_APPEND (binfo
, base_binfo
);
12238 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12241 if (VEC_length (tree
, CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12242 /* If we didn't get max_vbases vbases, we must have shared at
12243 least one of them, and are therefore diamond shaped. */
12244 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12246 /* Unmark all the types. */
12247 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12248 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12249 TYPE_MARKED_P (ref
) = 0;
12251 /* Now see if we have a repeated base type. */
12252 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12254 for (base_binfo
= binfo
; base_binfo
;
12255 base_binfo
= TREE_CHAIN (base_binfo
))
12257 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12259 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12262 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12264 for (base_binfo
= binfo
; base_binfo
;
12265 base_binfo
= TREE_CHAIN (base_binfo
))
12266 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12267 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12276 /* Copies the enum-related properties from type SRC to type DST.
12277 Used with the underlying type of an enum and the enum itself. */
12279 copy_type_enum (tree dst
, tree src
)
12282 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12284 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12285 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12286 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12287 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12288 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12289 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12290 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12291 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12292 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12296 /* Begin compiling the definition of an enumeration type.
12299 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12301 UNDERLYING_TYPE is the type that will be used as the storage for
12302 the enumeration type. This should be NULL_TREE if no storage type
12305 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12307 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12309 Returns the type object, as yet incomplete.
12310 Also records info about it so that build_enumerator
12311 may be used to declare the individual values as they are read. */
12314 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12315 bool scoped_enum_p
, bool *is_new
)
12317 tree prevtype
= NULL_TREE
;
12318 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
12322 /* [C++0x dcl.enum]p5:
12324 If not explicitly specified, the underlying type of a scoped
12325 enumeration type is int. */
12326 if (!underlying_type
&& scoped_enum_p
)
12327 underlying_type
= integer_type_node
;
12329 if (underlying_type
)
12330 underlying_type
= cv_unqualified (underlying_type
);
12332 /* If this is the real definition for a previous forward reference,
12333 fill in the contents in the same object that used to be the
12334 forward reference. */
12336 enumtype
= lookup_and_check_tag (enum_type
, name
,
12337 /*tag_scope=*/ts_current
,
12338 /*template_header_p=*/false);
12340 /* In case of a template_decl, the only check that should be deferred
12341 to instantiation time is the comparison of underlying types. */
12342 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12344 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12346 error_at (input_location
, "scoped/unscoped mismatch "
12347 "in enum %q#T", enumtype
);
12348 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12349 "previous definition here");
12350 enumtype
= error_mark_node
;
12352 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12354 error_at (input_location
, "underlying type mismatch "
12355 "in enum %q#T", enumtype
);
12356 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12357 "previous definition here");
12358 enumtype
= error_mark_node
;
12360 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12361 && !dependent_type_p (underlying_type
)
12362 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12363 && !same_type_p (underlying_type
,
12364 ENUM_UNDERLYING_TYPE (enumtype
)))
12366 error_at (input_location
, "different underlying type "
12367 "in enum %q#T", enumtype
);
12368 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12369 "previous definition here");
12370 underlying_type
= NULL_TREE
;
12374 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12375 || processing_template_decl
)
12377 /* In case of error, make a dummy enum to allow parsing to
12379 if (enumtype
== error_mark_node
)
12381 name
= make_anon_name ();
12382 enumtype
= NULL_TREE
;
12385 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12386 of an opaque enum, or an opaque enum of an already defined
12387 enumeration (C++0x only).
12388 In any other case, it'll be NULL_TREE. */
12394 prevtype
= enumtype
;
12396 /* Do not push the decl more than once, unless we need to
12397 compare underlying types at instantiation time */
12399 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12400 || (underlying_type
12401 && dependent_type_p (underlying_type
))
12402 || (ENUM_UNDERLYING_TYPE (enumtype
)
12403 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12405 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12406 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12409 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12412 if (enumtype
== error_mark_node
)
12413 return error_mark_node
;
12415 /* The enum is considered opaque until the opening '{' of the
12416 enumerator list. */
12417 SET_OPAQUE_ENUM_P (enumtype
, true);
12418 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12421 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12423 if (underlying_type
)
12425 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12427 copy_type_enum (enumtype
, underlying_type
);
12428 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12430 else if (dependent_type_p (underlying_type
))
12431 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12433 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12434 underlying_type
, enumtype
);
12437 /* If into a template class, the returned enum is always the first
12438 declaration (opaque or not) seen. This way all the references to
12439 this type will be to the same declaration. The following ones are used
12440 only to check for definition errors. */
12441 if (prevtype
&& processing_template_decl
)
12447 /* After processing and defining all the values of an enumeration type,
12448 install their decls in the enumeration type.
12449 ENUMTYPE is the type object. */
12452 finish_enum_value_list (tree enumtype
)
12455 tree underlying_type
;
12458 tree minnode
, maxnode
;
12461 bool fixed_underlying_type_p
12462 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12464 /* We built up the VALUES in reverse order. */
12465 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12467 /* For an enum defined in a template, just set the type of the values;
12468 all further processing is postponed until the template is
12469 instantiated. We need to set the type so that tsubst of a CONST_DECL
12471 if (processing_template_decl
)
12473 for (values
= TYPE_VALUES (enumtype
);
12475 values
= TREE_CHAIN (values
))
12476 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12480 /* Determine the minimum and maximum values of the enumerators. */
12481 if (TYPE_VALUES (enumtype
))
12483 minnode
= maxnode
= NULL_TREE
;
12485 for (values
= TYPE_VALUES (enumtype
);
12487 values
= TREE_CHAIN (values
))
12489 decl
= TREE_VALUE (values
);
12491 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12492 each enumerator has the type of its enumeration. Prior to the
12493 closing brace, the type of each enumerator is the type of its
12494 initializing value. */
12495 TREE_TYPE (decl
) = enumtype
;
12497 /* Update the minimum and maximum values, if appropriate. */
12498 value
= DECL_INITIAL (decl
);
12499 if (value
== error_mark_node
)
12500 value
= integer_zero_node
;
12501 /* Figure out what the minimum and maximum values of the
12502 enumerators are. */
12504 minnode
= maxnode
= value
;
12505 else if (tree_int_cst_lt (maxnode
, value
))
12507 else if (tree_int_cst_lt (value
, minnode
))
12514 If the enumerator-list is empty, the underlying type is as if
12515 the enumeration had a single enumerator with value 0. */
12516 minnode
= maxnode
= integer_zero_node
;
12518 if (!fixed_underlying_type_p
)
12520 /* Compute the number of bits require to represent all values of the
12521 enumeration. We must do this before the type of MINNODE and
12522 MAXNODE are transformed, since tree_int_cst_min_precision relies
12523 on the TREE_TYPE of the value it is passed. */
12524 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12525 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12526 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12527 int precision
= MAX (lowprec
, highprec
);
12529 bool use_short_enum
;
12531 /* Determine the underlying type of the enumeration.
12535 The underlying type of an enumeration is an integral type that
12536 can represent all the enumerator values defined in the
12537 enumeration. It is implementation-defined which integral type is
12538 used as the underlying type for an enumeration except that the
12539 underlying type shall not be larger than int unless the value of
12540 an enumerator cannot fit in an int or unsigned int.
12542 We use "int" or an "unsigned int" as the underlying type, even if
12543 a smaller integral type would work, unless the user has
12544 explicitly requested that we use the smallest possible type. The
12545 user can request that for all enumerations with a command line
12546 flag, or for just one enumeration with an attribute. */
12548 use_short_enum
= flag_short_enums
12549 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12551 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12555 underlying_type
= integer_types
[itk
];
12556 if (underlying_type
!= NULL_TREE
12557 && TYPE_PRECISION (underlying_type
) >= precision
12558 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12561 if (itk
== itk_none
)
12565 IF no integral type can represent all the enumerator values, the
12566 enumeration is ill-formed. */
12567 error ("no integral type can represent all of the enumerator values "
12568 "for %qT", enumtype
);
12569 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12570 underlying_type
= integer_types
[itk_unsigned_long_long
];
12575 The value of sizeof() applied to an enumeration type, an object
12576 of an enumeration type, or an enumerator, is the value of sizeof()
12577 applied to the underlying type. */
12578 copy_type_enum (enumtype
, underlying_type
);
12580 /* Compute the minimum and maximum values for the type.
12584 For an enumeration where emin is the smallest enumerator and emax
12585 is the largest, the values of the enumeration are the values of the
12586 underlying type in the range bmin to bmax, where bmin and bmax are,
12587 respectively, the smallest and largest values of the smallest bit-
12588 field that can store emin and emax. */
12590 /* The middle-end currently assumes that types with TYPE_PRECISION
12591 narrower than their underlying type are suitably zero or sign
12592 extended to fill their mode. Similarly, it assumes that the front
12593 end assures that a value of a particular type must be within
12594 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12596 We used to set these fields based on bmin and bmax, but that led
12597 to invalid assumptions like optimizing away bounds checking. So
12598 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12599 TYPE_MAX_VALUE to the values for the mode above and only restrict
12600 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12601 ENUM_UNDERLYING_TYPE (enumtype
)
12602 = build_distinct_type_copy (underlying_type
);
12603 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12604 set_min_and_max_values_for_integral_type
12605 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12607 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12608 if (flag_strict_enums
)
12609 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12613 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12615 /* Convert each of the enumerators to the type of the underlying
12616 type of the enumeration. */
12617 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12619 location_t saved_location
;
12621 decl
= TREE_VALUE (values
);
12622 saved_location
= input_location
;
12623 input_location
= DECL_SOURCE_LOCATION (decl
);
12624 if (fixed_underlying_type_p
)
12625 /* If the enumeration type has a fixed underlying type, we
12626 already checked all of the enumerator values. */
12627 value
= DECL_INITIAL (decl
);
12629 value
= perform_implicit_conversion (underlying_type
,
12630 DECL_INITIAL (decl
),
12631 tf_warning_or_error
);
12632 input_location
= saved_location
;
12634 /* Do not clobber shared ints. */
12635 value
= copy_node (value
);
12637 TREE_TYPE (value
) = enumtype
;
12638 DECL_INITIAL (decl
) = value
;
12641 /* Fix up all variant types of this enum type. */
12642 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12643 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12645 if (at_class_scope_p ()
12646 && COMPLETE_TYPE_P (current_class_type
)
12647 && UNSCOPED_ENUM_P (enumtype
))
12648 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12649 current_class_type
);
12651 /* Finish debugging output for this type. */
12652 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12655 /* Finishes the enum type. This is called only the first time an
12656 enumeration is seen, be it opaque or odinary.
12657 ENUMTYPE is the type object. */
12660 finish_enum (tree enumtype
)
12662 if (processing_template_decl
)
12664 if (at_function_scope_p ())
12665 add_stmt (build_min (TAG_DEFN
, enumtype
));
12669 /* If this is a forward declaration, there should not be any variants,
12670 though we can get a variant in the middle of an enum-specifier with
12671 wacky code like 'enum E { e = sizeof(const E*) };' */
12672 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12673 && (TYPE_VALUES (enumtype
)
12674 || !TYPE_NEXT_VARIANT (enumtype
)));
12677 /* Build and install a CONST_DECL for an enumeration constant of the
12678 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12679 LOC is the location of NAME.
12680 Assignment of sequential values by default is handled here. */
12683 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12689 /* If the VALUE was erroneous, pretend it wasn't there; that will
12690 result in the enum being assigned the next value in sequence. */
12691 if (value
== error_mark_node
)
12694 /* Remove no-op casts from the value. */
12696 STRIP_TYPE_NOPS (value
);
12698 if (! processing_template_decl
)
12700 /* Validate and default VALUE. */
12701 if (value
!= NULL_TREE
)
12703 value
= cxx_constant_value (value
);
12705 if (TREE_CODE (value
) != INTEGER_CST
12706 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12708 error ("enumerator value for %qD is not an integer constant",
12714 /* Default based on previous value. */
12715 if (value
== NULL_TREE
)
12717 if (TYPE_VALUES (enumtype
))
12722 /* C++03 7.2/4: If no initializer is specified for the first
12723 enumerator, the type is an unspecified integral
12724 type. Otherwise the type is the same as the type of the
12725 initializing value of the preceding enumerator unless the
12726 incremented value is not representable in that type, in
12727 which case the type is an unspecified integral type
12728 sufficient to contain the incremented value. */
12729 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12730 if (error_operand_p (prev_value
))
12731 value
= error_mark_node
;
12734 double_int di
= TREE_INT_CST (prev_value
)
12735 .add_with_sign (double_int_one
,
12736 false, &overflowed
);
12739 tree type
= TREE_TYPE (prev_value
);
12740 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12741 if (!double_int_fits_to_tree_p (type
, di
))
12744 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12746 type
= integer_types
[itk
];
12747 if (type
!= NULL_TREE
12748 && (pos
|| !TYPE_UNSIGNED (type
))
12749 && double_int_fits_to_tree_p (type
, di
))
12752 if (type
&& cxx_dialect
< cxx0x
12753 && itk
> itk_unsigned_long
)
12754 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12755 incremented enumerator value is too large for %<unsigned long%>" : "\
12756 incremented enumerator value is too large for %<long%>");
12758 if (type
== NULL_TREE
)
12761 value
= double_int_to_tree (type
, di
);
12766 error ("overflow in enumeration values at %qD", name
);
12767 value
= error_mark_node
;
12772 value
= integer_zero_node
;
12775 /* Remove no-op casts from the value. */
12776 STRIP_TYPE_NOPS (value
);
12778 /* If the underlying type of the enum is fixed, check whether
12779 the enumerator values fits in the underlying type. If it
12780 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12781 if (ENUM_UNDERLYING_TYPE (enumtype
)
12783 && TREE_CODE (value
) == INTEGER_CST
12784 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12786 error ("enumerator value %E is too large for underlying type %<%T%>",
12787 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12789 /* Silently convert the value so that we can continue. */
12790 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12795 /* C++ associates enums with global, function, or class declarations. */
12796 context
= current_scope ();
12798 /* Build the actual enumeration constant. Note that the enumeration
12799 constants have the underlying type of the enum (if it is fixed)
12800 or the type of their initializer (if the underlying type of the
12801 enum is not fixed):
12805 If the underlying type is fixed, the type of each enumerator
12806 prior to the closing brace is the underlying type; if the
12807 initializing value of an enumerator cannot be represented by
12808 the underlying type, the program is ill-formed. If the
12809 underlying type is not fixed, the type of each enumerator is
12810 the type of its initializing value.
12812 If the underlying type is not fixed, it will be computed by
12813 finish_enum and we will reset the type of this enumerator. Of
12814 course, if we're processing a template, there may be no value. */
12815 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12817 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12819 DECL_CONTEXT (decl
) = enumtype
;
12820 TREE_CONSTANT (decl
) = 1;
12821 TREE_READONLY (decl
) = 1;
12822 DECL_INITIAL (decl
) = value
;
12824 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12825 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12826 on the TYPE_FIELDS list for `S'. (That's so that you can say
12827 things like `S::i' later.) */
12828 finish_member_declaration (decl
);
12832 /* Add this enumeration constant to the list for this type. */
12833 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12836 /* Look for an enumerator with the given NAME within the enumeration
12837 type ENUMTYPE. This routine is used primarily for qualified name
12838 lookup into an enumerator in C++0x, e.g.,
12840 enum class Color { Red, Green, Blue };
12842 Color color = Color::Red;
12844 Returns the value corresponding to the enumerator, or
12845 NULL_TREE if no such enumerator was found. */
12847 lookup_enumerator (tree enumtype
, tree name
)
12850 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12852 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12853 return e
? TREE_VALUE (e
) : NULL_TREE
;
12857 /* We're defining DECL. Make sure that its type is OK. */
12860 check_function_type (tree decl
, tree current_function_parms
)
12862 tree fntype
= TREE_TYPE (decl
);
12863 tree return_type
= complete_type (TREE_TYPE (fntype
));
12865 /* In a function definition, arg types must be complete. */
12866 require_complete_types_for_parms (current_function_parms
);
12868 if (dependent_type_p (return_type
)
12869 || type_uses_auto (return_type
))
12871 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12872 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12874 tree args
= TYPE_ARG_TYPES (fntype
);
12876 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12877 error ("return type %q#T is incomplete", return_type
);
12879 error ("return type has Java class type %q#T", return_type
);
12881 /* Make it return void instead. */
12882 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12883 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12885 TREE_CHAIN (args
));
12887 fntype
= build_function_type (void_type_node
, args
);
12889 = build_exception_variant (fntype
,
12890 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12891 fntype
= (cp_build_type_attribute_variant
12892 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12893 TREE_TYPE (decl
) = fntype
;
12896 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12899 /* Create the FUNCTION_DECL for a function definition.
12900 DECLSPECS and DECLARATOR are the parts of the declaration;
12901 they describe the function's name and the type it returns,
12902 but twisted together in a fashion that parallels the syntax of C.
12904 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12905 DECLARATOR is really the DECL for the function we are about to
12906 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12907 indicating that the function is an inline defined in-class.
12909 This function creates a binding context for the function body
12910 as well as setting up the FUNCTION_DECL in current_function_decl.
12912 For C++, we must first check whether that datum makes any sense.
12913 For example, "class A local_a(1,2);" means that variable local_a
12914 is an aggregate of type A, which should have a constructor
12915 applied to it with the argument list [1, 2].
12917 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12918 or may be a BLOCK if the function has been defined previously
12919 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12920 error_mark_node if the function has never been defined, or
12921 a BLOCK if the function has been defined somewhere. */
12924 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12926 tree ctype
= NULL_TREE
;
12929 int doing_friend
= 0;
12930 cp_binding_level
*bl
;
12931 tree current_function_parms
;
12932 struct c_fileinfo
*finfo
12933 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12934 bool honor_interface
;
12936 /* Sanity check. */
12937 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12938 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12940 fntype
= TREE_TYPE (decl1
);
12941 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12942 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12944 /* ISO C++ 11.4/5. A friend function defined in a class is in
12945 the (lexical) scope of the class in which it is defined. */
12946 if (!ctype
&& DECL_FRIEND_P (decl1
))
12948 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12950 /* CTYPE could be null here if we're dealing with a template;
12951 for example, `inline friend float foo()' inside a template
12952 will have no CTYPE set. */
12953 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12959 if (DECL_DECLARED_INLINE_P (decl1
)
12960 && lookup_attribute ("noinline", attrs
))
12961 warning (0, "inline function %q+D given attribute noinline", decl1
);
12963 /* Handle gnu_inline attribute. */
12964 if (GNU_INLINE_P (decl1
))
12966 DECL_EXTERNAL (decl1
) = 1;
12967 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12968 DECL_INTERFACE_KNOWN (decl1
) = 1;
12969 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12972 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12973 /* This is a constructor, we must ensure that any default args
12974 introduced by this definition are propagated to the clones
12975 now. The clones are used directly in overload resolution. */
12976 adjust_clone_args (decl1
);
12978 /* Sometimes we don't notice that a function is a static member, and
12979 build a METHOD_TYPE for it. Fix that up now. */
12980 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12981 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12983 /* Set up current_class_type, and enter the scope of the class, if
12986 push_nested_class (ctype
);
12987 else if (DECL_STATIC_FUNCTION_P (decl1
))
12988 push_nested_class (DECL_CONTEXT (decl1
));
12990 /* Now that we have entered the scope of the class, we must restore
12991 the bindings for any template parameters surrounding DECL1, if it
12992 is an inline member template. (Order is important; consider the
12993 case where a template parameter has the same name as a field of
12994 the class.) It is not until after this point that
12995 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12996 if (flags
& SF_INCLASS_INLINE
)
12997 maybe_begin_member_template_processing (decl1
);
12999 /* Effective C++ rule 15. */
13001 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13002 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
13003 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13005 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13006 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13007 if (!DECL_INITIAL (decl1
))
13008 DECL_INITIAL (decl1
) = error_mark_node
;
13010 /* This function exists in static storage.
13011 (This does not mean `static' in the C sense!) */
13012 TREE_STATIC (decl1
) = 1;
13014 /* We must call push_template_decl after current_class_type is set
13015 up. (If we are processing inline definitions after exiting a
13016 class scope, current_class_type will be NULL_TREE until set above
13017 by push_nested_class.) */
13018 if (processing_template_decl
)
13020 /* FIXME: Handle error_mark_node more gracefully. */
13021 tree newdecl1
= push_template_decl (decl1
);
13022 if (newdecl1
!= error_mark_node
)
13026 /* We are now in the scope of the function being defined. */
13027 current_function_decl
= decl1
;
13029 /* Save the parm names or decls from this function's declarator
13030 where store_parm_decls will find them. */
13031 current_function_parms
= DECL_ARGUMENTS (decl1
);
13033 /* Make sure the parameter and return types are reasonable. When
13034 you declare a function, these types can be incomplete, but they
13035 must be complete when you define the function. */
13036 check_function_type (decl1
, current_function_parms
);
13038 /* Build the return declaration for the function. */
13039 restype
= TREE_TYPE (fntype
);
13041 if (DECL_RESULT (decl1
) == NULL_TREE
)
13045 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13046 DECL_ARTIFICIAL (resdecl
) = 1;
13047 DECL_IGNORED_P (resdecl
) = 1;
13048 DECL_RESULT (decl1
) = resdecl
;
13050 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13053 /* Let the user know we're compiling this function. */
13054 announce_function (decl1
);
13056 /* Record the decl so that the function name is defined.
13057 If we already have a decl for this name, and it is a FUNCTION_DECL,
13058 use the old decl. */
13059 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13061 /* A specialization is not used to guide overload resolution. */
13062 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13063 && !(DECL_USE_TEMPLATE (decl1
) &&
13064 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13066 tree olddecl
= pushdecl (decl1
);
13068 if (olddecl
== error_mark_node
)
13069 /* If something went wrong when registering the declaration,
13070 use DECL1; we have to have a FUNCTION_DECL to use when
13071 parsing the body of the function. */
13075 /* Otherwise, OLDDECL is either a previous declaration
13076 of the same function or DECL1 itself. */
13078 if (warn_missing_declarations
13079 && olddecl
== decl1
13080 && !DECL_MAIN_P (decl1
)
13081 && TREE_PUBLIC (decl1
)
13082 && !DECL_DECLARED_INLINE_P (decl1
))
13086 /* Check whether DECL1 is in an anonymous
13088 for (context
= DECL_CONTEXT (decl1
);
13090 context
= DECL_CONTEXT (context
))
13092 if (TREE_CODE (context
) == NAMESPACE_DECL
13093 && DECL_NAME (context
) == NULL_TREE
)
13097 if (context
== NULL
)
13098 warning (OPT_Wmissing_declarations
,
13099 "no previous declaration for %q+D", decl1
);
13107 /* We need to set the DECL_CONTEXT. */
13108 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13109 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13111 fntype
= TREE_TYPE (decl1
);
13113 /* If #pragma weak applies, mark the decl appropriately now.
13114 The pragma only applies to global functions. Because
13115 determining whether or not the #pragma applies involves
13116 computing the mangled name for the declaration, we cannot
13117 apply the pragma until after we have merged this declaration
13118 with any previous declarations; if the original declaration
13119 has a linkage specification, that specification applies to
13120 the definition as well, and may affect the mangled name. */
13121 if (DECL_FILE_SCOPE_P (decl1
))
13122 maybe_apply_pragma_weak (decl1
);
13125 /* Reset this in case the call to pushdecl changed it. */
13126 current_function_decl
= decl1
;
13128 gcc_assert (DECL_INITIAL (decl1
));
13130 /* This function may already have been parsed, in which case just
13131 return; our caller will skip over the body without parsing. */
13132 if (DECL_INITIAL (decl1
) != error_mark_node
)
13135 /* Initialize RTL machinery. We cannot do this until
13136 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13137 even when processing a template; this is how we get
13138 CFUN set up, and our per-function variables initialized.
13139 FIXME factor out the non-RTL stuff. */
13140 bl
= current_binding_level
;
13141 allocate_struct_function (decl1
, processing_template_decl
);
13143 /* Initialize the language data structures. Whenever we start
13144 a new function, we destroy temporaries in the usual way. */
13145 cfun
->language
= ggc_alloc_cleared_language_function ();
13146 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13147 current_binding_level
= bl
;
13149 if (!processing_template_decl
&& type_uses_auto (restype
))
13151 FNDECL_USED_AUTO (decl1
) = true;
13152 current_function_auto_return_pattern
= restype
;
13155 /* Start the statement-tree, start the tree now. */
13156 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13158 /* If we are (erroneously) defining a function that we have already
13159 defined before, wipe out what we knew before. */
13160 if (!DECL_PENDING_INLINE_P (decl1
))
13161 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13163 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13165 /* We know that this was set up by `grokclassfn'. We do not
13166 wait until `store_parm_decls', since evil parse errors may
13167 never get us to that point. Here we keep the consistency
13168 between `current_class_type' and `current_class_ptr'. */
13169 tree t
= DECL_ARGUMENTS (decl1
);
13171 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13172 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
13174 cp_function_chain
->x_current_class_ref
13175 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13176 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13177 cp_function_chain
->x_current_class_ptr
= t
;
13179 /* Constructors and destructors need to know whether they're "in
13180 charge" of initializing virtual base classes. */
13181 t
= DECL_CHAIN (t
);
13182 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13184 current_in_charge_parm
= t
;
13185 t
= DECL_CHAIN (t
);
13187 if (DECL_HAS_VTT_PARM_P (decl1
))
13189 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13190 current_vtt_parm
= t
;
13194 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13195 /* Implicitly-defined methods (like the
13196 destructor for a class in which no destructor
13197 is explicitly declared) must not be defined
13198 until their definition is needed. So, we
13199 ignore interface specifications for
13200 compiler-generated functions. */
13201 && !DECL_ARTIFICIAL (decl1
));
13203 if (processing_template_decl
)
13204 /* Don't mess with interface flags. */;
13205 else if (DECL_INTERFACE_KNOWN (decl1
))
13207 tree ctx
= decl_function_context (decl1
);
13209 if (DECL_NOT_REALLY_EXTERN (decl1
))
13210 DECL_EXTERNAL (decl1
) = 0;
13212 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
13213 && TREE_PUBLIC (ctx
))
13214 /* This is a function in a local class in an extern inline
13216 comdat_linkage (decl1
);
13218 /* If this function belongs to an interface, it is public.
13219 If it belongs to someone else's interface, it is also external.
13220 This only affects inlines and template instantiations. */
13221 else if (!finfo
->interface_unknown
&& honor_interface
)
13223 if (DECL_DECLARED_INLINE_P (decl1
)
13224 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13226 DECL_EXTERNAL (decl1
)
13227 = (finfo
->interface_only
13228 || (DECL_DECLARED_INLINE_P (decl1
)
13229 && ! flag_implement_inlines
13230 && !DECL_VINDEX (decl1
)));
13232 /* For WIN32 we also want to put these in linkonce sections. */
13233 maybe_make_one_only (decl1
);
13236 DECL_EXTERNAL (decl1
) = 0;
13237 DECL_INTERFACE_KNOWN (decl1
) = 1;
13238 /* If this function is in an interface implemented in this file,
13239 make sure that the back end knows to emit this function
13241 if (!DECL_EXTERNAL (decl1
))
13242 mark_needed (decl1
);
13244 else if (finfo
->interface_unknown
&& finfo
->interface_only
13245 && honor_interface
)
13247 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13248 interface, we will have both finfo->interface_unknown and
13249 finfo->interface_only set. In that case, we don't want to
13250 use the normal heuristics because someone will supply a
13251 #pragma implementation elsewhere, and deducing it here would
13252 produce a conflict. */
13253 comdat_linkage (decl1
);
13254 DECL_EXTERNAL (decl1
) = 0;
13255 DECL_INTERFACE_KNOWN (decl1
) = 1;
13256 DECL_DEFER_OUTPUT (decl1
) = 1;
13260 /* This is a definition, not a reference.
13261 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13262 if (!GNU_INLINE_P (decl1
))
13263 DECL_EXTERNAL (decl1
) = 0;
13265 if ((DECL_DECLARED_INLINE_P (decl1
)
13266 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13267 && ! DECL_INTERFACE_KNOWN (decl1
))
13268 DECL_DEFER_OUTPUT (decl1
) = 1;
13270 DECL_INTERFACE_KNOWN (decl1
) = 1;
13273 /* Determine the ELF visibility attribute for the function. We must not
13274 do this before calling "pushdecl", as we must allow "duplicate_decls"
13275 to merge any attributes appropriately. We also need to wait until
13277 if (!DECL_CLONED_FUNCTION_P (decl1
))
13278 determine_visibility (decl1
);
13280 begin_scope (sk_function_parms
, decl1
);
13284 if (DECL_DESTRUCTOR_P (decl1
)
13285 || (DECL_CONSTRUCTOR_P (decl1
)
13286 && targetm
.cxx
.cdtor_returns_this ()))
13288 cdtor_label
= build_decl (input_location
,
13289 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13290 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13293 start_fname_decls ();
13295 store_parm_decls (current_function_parms
);
13299 /* Like start_preparsed_function, except that instead of a
13300 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13302 Returns 1 on success. If the DECLARATOR is not suitable for a function
13303 (it defines a datum instead), we return 0, which tells
13304 yyparse to report a parse error. */
13307 start_function (cp_decl_specifier_seq
*declspecs
,
13308 const cp_declarator
*declarator
,
13313 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13314 if (decl1
== error_mark_node
)
13316 /* If the declarator is not suitable for a function definition,
13317 cause a syntax error. */
13318 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13320 error ("invalid function declaration");
13324 if (DECL_MAIN_P (decl1
))
13325 /* main must return int. grokfndecl should have corrected it
13326 (and issued a diagnostic) if the user got it wrong. */
13327 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13328 integer_type_node
));
13330 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13335 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13339 use_eh_spec_block (tree fn
)
13341 return (flag_exceptions
&& flag_enforce_eh_specs
13342 && !processing_template_decl
13343 && !type_throw_all_p (TREE_TYPE (fn
))
13344 /* We insert the EH_SPEC_BLOCK only in the original
13345 function; then, it is copied automatically to the
13347 && !DECL_CLONED_FUNCTION_P (fn
)
13348 /* Implicitly-generated constructors and destructors have
13349 exception specifications. However, those specifications
13350 are the union of the possible exceptions specified by the
13351 constructors/destructors for bases and members, so no
13352 unallowed exception will ever reach this function. By
13353 not creating the EH_SPEC_BLOCK we save a little memory,
13354 and we avoid spurious warnings about unreachable
13356 && !DECL_DEFAULTED_FN (fn
));
13359 /* Store the parameter declarations into the current function declaration.
13360 This is called after parsing the parameter declarations, before
13361 digesting the body of the function.
13363 Also install to binding contour return value identifier, if any. */
13366 store_parm_decls (tree current_function_parms
)
13368 tree fndecl
= current_function_decl
;
13371 /* This is a chain of any other decls that came in among the parm
13372 declarations. If a parm is declared with enum {foo, bar} x;
13373 then CONST_DECLs for foo and bar are put here. */
13374 tree nonparms
= NULL_TREE
;
13376 if (current_function_parms
)
13378 /* This case is when the function was defined with an ANSI prototype.
13379 The parms already have decls, so we need not do anything here
13380 except record them as in effect
13381 and complain if any redundant old-style parm decls were written. */
13383 tree specparms
= current_function_parms
;
13386 /* Must clear this because it might contain TYPE_DECLs declared
13388 current_binding_level
->names
= NULL
;
13390 /* If we're doing semantic analysis, then we'll call pushdecl
13391 for each of these. We must do them in reverse order so that
13392 they end in the correct forward order. */
13393 specparms
= nreverse (specparms
);
13395 for (parm
= specparms
; parm
; parm
= next
)
13397 next
= DECL_CHAIN (parm
);
13398 if (TREE_CODE (parm
) == PARM_DECL
)
13400 if (DECL_NAME (parm
) == NULL_TREE
13401 || TREE_CODE (parm
) != VOID_TYPE
)
13404 error ("parameter %qD declared void", parm
);
13408 /* If we find an enum constant or a type tag,
13409 put it aside for the moment. */
13410 TREE_CHAIN (parm
) = NULL_TREE
;
13411 nonparms
= chainon (nonparms
, parm
);
13415 /* Get the decls in their original chain order and record in the
13416 function. This is all and only the PARM_DECLs that were
13417 pushed into scope by the loop above. */
13418 DECL_ARGUMENTS (fndecl
) = getdecls ();
13421 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13423 /* Now store the final chain of decls for the arguments
13424 as the decl-chain of the current lexical scope.
13425 Put the enumerators in as well, at the front so that
13426 DECL_ARGUMENTS is not modified. */
13427 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13429 if (use_eh_spec_block (current_function_decl
))
13430 current_eh_spec_block
= begin_eh_spec_block ();
13434 /* We have finished doing semantic analysis on DECL, but have not yet
13435 generated RTL for its body. Save away our current state, so that
13436 when we want to generate RTL later we know what to do. */
13439 save_function_data (tree decl
)
13441 struct language_function
*f
;
13443 /* Save the language-specific per-function data so that we can
13444 get it back when we really expand this function. */
13445 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13448 f
= ggc_alloc_language_function ();
13449 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13450 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13452 /* Clear out the bits we don't need. */
13453 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13454 f
->bindings
= NULL
;
13455 f
->x_local_names
= NULL
;
13456 f
->base
.local_typedefs
= NULL
;
13460 /* Set the return value of the constructor (if present). */
13463 finish_constructor_body (void)
13468 if (targetm
.cxx
.cdtor_returns_this ()
13469 && (! TYPE_FOR_JAVA (current_class_type
)))
13471 /* Any return from a constructor will end up here. */
13472 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13474 val
= DECL_ARGUMENTS (current_function_decl
);
13475 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13476 DECL_RESULT (current_function_decl
), val
);
13477 /* Return the address of the object. */
13478 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13479 add_stmt (exprstmt
);
13483 /* Do all the processing for the beginning of a destructor; set up the
13484 vtable pointers and cleanups for bases and members. */
13487 begin_destructor_body (void)
13489 tree compound_stmt
;
13491 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13492 issued an error message. We still want to try to process the
13493 body of the function, but initialize_vtbl_ptrs will crash if
13494 TYPE_BINFO is NULL. */
13495 if (COMPLETE_TYPE_P (current_class_type
))
13497 compound_stmt
= begin_compound_stmt (0);
13498 /* Make all virtual function table pointers in non-virtual base
13499 classes point to CURRENT_CLASS_TYPE's virtual function
13501 initialize_vtbl_ptrs (current_class_ptr
);
13502 finish_compound_stmt (compound_stmt
);
13504 /* And insert cleanups for our bases and members so that they
13505 will be properly destroyed if we throw. */
13506 push_base_cleanups ();
13510 /* At the end of every destructor we generate code to delete the object if
13511 necessary. Do that now. */
13514 finish_destructor_body (void)
13518 /* Any return from a destructor will end up here; that way all base
13519 and member cleanups will be run when the function returns. */
13520 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13522 /* In a virtual destructor, we must call delete. */
13523 if (DECL_VIRTUAL_P (current_function_decl
))
13526 tree virtual_size
= cxx_sizeof (current_class_type
);
13530 At the point of definition of a virtual destructor (including
13531 an implicit definition), non-placement operator delete shall
13532 be looked up in the scope of the destructor's class and if
13533 found shall be accessible and unambiguous. */
13534 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13536 /*global_p=*/false,
13537 /*placement=*/NULL_TREE
,
13538 /*alloc_fn=*/NULL_TREE
,
13539 tf_warning_or_error
);
13541 if_stmt
= begin_if_stmt ();
13542 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13543 current_in_charge_parm
,
13546 finish_expr_stmt (exprstmt
);
13547 finish_then_clause (if_stmt
);
13548 finish_if_stmt (if_stmt
);
13551 if (targetm
.cxx
.cdtor_returns_this ())
13555 val
= DECL_ARGUMENTS (current_function_decl
);
13556 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13557 DECL_RESULT (current_function_decl
), val
);
13558 /* Return the address of the object. */
13559 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13560 add_stmt (exprstmt
);
13564 /* Do the necessary processing for the beginning of a function body, which
13565 in this case includes member-initializers, but not the catch clauses of
13566 a function-try-block. Currently, this means opening a binding level
13567 for the member-initializers (in a ctor), member cleanups (in a dtor),
13568 and capture proxies (in a lambda operator()). */
13571 begin_function_body (void)
13575 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13578 if (processing_template_decl
)
13579 /* Do nothing now. */;
13581 /* Always keep the BLOCK node associated with the outermost pair of
13582 curly braces of a function. These are needed for correct
13583 operation of dwarfout.c. */
13584 keep_next_level (true);
13586 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13588 if (processing_template_decl
)
13589 /* Do nothing now. */;
13590 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13591 begin_destructor_body ();
13596 /* Do the processing for the end of a function body. Currently, this means
13597 closing out the cleanups for fully-constructed bases and members, and in
13598 the case of the destructor, deleting the object if desired. Again, this
13599 is only meaningful for [cd]tors, since they are the only functions where
13600 there is a significant distinction between the main body and any
13601 function catch clauses. Handling, say, main() return semantics here
13602 would be wrong, as flowing off the end of a function catch clause for
13603 main() would also need to return 0. */
13606 finish_function_body (tree compstmt
)
13608 if (compstmt
== NULL_TREE
)
13611 /* Close the block. */
13612 finish_compound_stmt (compstmt
);
13614 if (processing_template_decl
)
13615 /* Do nothing now. */;
13616 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13617 finish_constructor_body ();
13618 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13619 finish_destructor_body ();
13622 /* Given a function, returns the BLOCK corresponding to the outermost level
13623 of curly braces, skipping the artificial block created for constructor
13627 outer_curly_brace_block (tree fndecl
)
13629 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13630 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13631 /* Skip the artificial function body block. */
13632 block
= BLOCK_SUBBLOCKS (block
);
13636 /* If FNDECL is a class's key method, add the class to the list of
13637 keyed classes that should be emitted. */
13640 record_key_method_defined (tree fndecl
)
13642 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13643 && DECL_VIRTUAL_P (fndecl
)
13644 && !processing_template_decl
)
13646 tree fnclass
= DECL_CONTEXT (fndecl
);
13647 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13648 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13652 /* Subroutine of finish_function.
13653 Save the body of constexpr functions for possible
13654 future compile time evaluation. */
13657 maybe_save_function_definition (tree fun
)
13659 if (!processing_template_decl
13660 && DECL_DECLARED_CONSTEXPR_P (fun
)
13661 && !DECL_CLONED_FUNCTION_P (fun
))
13662 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13665 /* Finish up a function declaration and compile that function
13666 all the way to assembler language output. The free the storage
13667 for the function definition.
13669 FLAGS is a bitwise or of the following values:
13671 We just finished processing the body of an in-class inline
13672 function definition. (This processing will have taken place
13673 after the class definition is complete.) */
13676 finish_function (int flags
)
13678 tree fndecl
= current_function_decl
;
13679 tree fntype
, ctype
= NULL_TREE
;
13680 int inclass_inline
= (flags
& 2) != 0;
13682 /* When we get some parse errors, we can end up without a
13683 current_function_decl, so cope. */
13684 if (fndecl
== NULL_TREE
)
13685 return error_mark_node
;
13687 if (c_dialect_objc ())
13688 objc_finish_function ();
13690 gcc_assert (!defer_mark_used_calls
);
13691 defer_mark_used_calls
= true;
13693 record_key_method_defined (fndecl
);
13695 fntype
= TREE_TYPE (fndecl
);
13697 /* TREE_READONLY (fndecl) = 1;
13698 This caused &foo to be of type ptr-to-const-function
13699 which then got a warning when stored in a ptr-to-function variable. */
13701 gcc_assert (building_stmt_list_p ());
13702 /* The current function is being defined, so its DECL_INITIAL should
13703 be set, and unless there's a multiple definition, it should be
13704 error_mark_node. */
13705 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13707 /* For a cloned function, we've already got all the code we need;
13708 there's no need to add any extra bits. */
13709 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13711 /* Make it so that `main' always returns 0 by default. */
13712 if (DECL_MAIN_P (current_function_decl
))
13713 finish_return_stmt (integer_zero_node
);
13715 if (use_eh_spec_block (current_function_decl
))
13716 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13717 (TREE_TYPE (current_function_decl
)),
13718 current_eh_spec_block
);
13721 /* If we're saving up tree structure, tie off the function now. */
13722 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13724 finish_fname_decls ();
13726 /* If this function can't throw any exceptions, remember that. */
13727 if (!processing_template_decl
13728 && !cp_function_chain
->can_throw
13729 && !flag_non_call_exceptions
13730 && !decl_replaceable_p (fndecl
))
13731 TREE_NOTHROW (fndecl
) = 1;
13733 /* This must come after expand_function_end because cleanups might
13734 have declarations (from inline functions) that need to go into
13735 this function's blocks. */
13737 /* If the current binding level isn't the outermost binding level
13738 for this function, either there is a bug, or we have experienced
13739 syntax errors and the statement tree is malformed. */
13740 if (current_binding_level
->kind
!= sk_function_parms
)
13742 /* Make sure we have already experienced errors. */
13743 gcc_assert (errorcount
);
13745 /* Throw away the broken statement tree and extra binding
13747 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13749 while (current_binding_level
->kind
!= sk_function_parms
)
13751 if (current_binding_level
->kind
== sk_class
)
13752 pop_nested_class ();
13754 poplevel (0, 0, 0);
13757 poplevel (1, 0, 1);
13759 /* Statements should always be full-expressions at the outermost set
13760 of curly braces for a function. */
13761 gcc_assert (stmts_are_full_exprs_p ());
13763 /* If there are no return statements in a function with auto return type,
13764 the return type is void. But if the declared type is something like
13765 auto*, this is an error. */
13766 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13767 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13769 if (!is_auto (current_function_auto_return_pattern
)
13770 && !current_function_returns_value
&& !current_function_returns_null
)
13772 error ("no return statements in function returning %qT",
13773 current_function_auto_return_pattern
);
13774 inform (input_location
, "only plain %<auto%> return type can be "
13775 "deduced to %<void%>");
13777 apply_deduced_return_type (fndecl
, void_type_node
);
13778 fntype
= TREE_TYPE (fndecl
);
13781 /* Save constexpr function body before it gets munged by
13782 the NRV transformation. */
13783 maybe_save_function_definition (fndecl
);
13785 /* Set up the named return value optimization, if we can. Candidate
13786 variables are selected in check_return_expr. */
13787 if (current_function_return_value
)
13789 tree r
= current_function_return_value
;
13792 if (r
!= error_mark_node
13793 /* This is only worth doing for fns that return in memory--and
13794 simpler, since we don't have to worry about promoted modes. */
13795 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13796 /* Only allow this for variables declared in the outer scope of
13797 the function so we know that their lifetime always ends with a
13798 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13799 we were to do this optimization in tree-ssa. */
13800 && (outer
= outer_curly_brace_block (fndecl
))
13801 && chain_member (r
, BLOCK_VARS (outer
)))
13802 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13804 current_function_return_value
= NULL_TREE
;
13807 /* Remember that we were in class scope. */
13808 if (current_class_name
)
13809 ctype
= current_class_type
;
13811 /* Must mark the RESULT_DECL as being in this function. */
13812 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13814 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13815 to the FUNCTION_DECL node itself. */
13816 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13818 /* Save away current state, if appropriate. */
13819 if (!processing_template_decl
)
13820 save_function_data (fndecl
);
13822 /* Complain if there's just no return statement. */
13823 if (warn_return_type
13824 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13825 && !dependent_type_p (TREE_TYPE (fntype
))
13826 && !current_function_returns_value
&& !current_function_returns_null
13827 /* Don't complain if we abort or throw. */
13828 && !current_function_returns_abnormally
13829 /* Don't complain if we are declared noreturn. */
13830 && !TREE_THIS_VOLATILE (fndecl
)
13831 && !DECL_NAME (DECL_RESULT (fndecl
))
13832 && !TREE_NO_WARNING (fndecl
)
13833 /* Structor return values (if any) are set by the compiler. */
13834 && !DECL_CONSTRUCTOR_P (fndecl
)
13835 && !DECL_DESTRUCTOR_P (fndecl
)
13836 && targetm
.warn_func_return (fndecl
))
13838 warning (OPT_Wreturn_type
,
13839 "no return statement in function returning non-void");
13840 TREE_NO_WARNING (fndecl
) = 1;
13843 /* Store the end of the function, so that we get good line number
13844 info for the epilogue. */
13845 cfun
->function_end_locus
= input_location
;
13847 /* Complain about parameters that are only set, but never otherwise used. */
13848 if (warn_unused_but_set_parameter
13849 && !processing_template_decl
13850 && errorcount
== unused_but_set_errorcount
13851 && !DECL_CLONED_FUNCTION_P (fndecl
))
13855 for (decl
= DECL_ARGUMENTS (fndecl
);
13857 decl
= DECL_CHAIN (decl
))
13858 if (TREE_USED (decl
)
13859 && TREE_CODE (decl
) == PARM_DECL
13860 && !DECL_READ_P (decl
)
13861 && DECL_NAME (decl
)
13862 && !DECL_ARTIFICIAL (decl
)
13863 && !TREE_NO_WARNING (decl
)
13864 && !DECL_IN_SYSTEM_HEADER (decl
)
13865 && TREE_TYPE (decl
) != error_mark_node
13866 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13867 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13868 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13869 warning (OPT_Wunused_but_set_parameter
,
13870 "parameter %q+D set but not used", decl
);
13871 unused_but_set_errorcount
= errorcount
;
13874 /* Complain about locally defined typedefs that are not used in this
13876 maybe_warn_unused_local_typedefs ();
13878 /* Genericize before inlining. */
13879 if (!processing_template_decl
)
13881 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13882 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13883 cp_genericize (fndecl
);
13884 /* Clear out the bits we don't need. */
13885 f
->x_current_class_ptr
= NULL
;
13886 f
->x_current_class_ref
= NULL
;
13887 f
->x_eh_spec_block
= NULL
;
13888 f
->x_in_charge_parm
= NULL
;
13889 f
->x_vtt_parm
= NULL
;
13890 f
->x_return_value
= NULL
;
13891 f
->bindings
= NULL
;
13892 f
->extern_decl_map
= NULL
;
13894 /* Clear out the bits we don't need. */
13895 local_names
= NULL
;
13897 /* We're leaving the context of this function, so zap cfun. It's still in
13898 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13900 current_function_decl
= NULL
;
13902 /* If this is an in-class inline definition, we may have to pop the
13903 bindings for the template parameters that we added in
13904 maybe_begin_member_template_processing when start_function was
13906 if (inclass_inline
)
13907 maybe_end_member_template_processing ();
13909 /* Leave the scope of the class. */
13911 pop_nested_class ();
13916 current_function_decl
= NULL_TREE
;
13918 defer_mark_used_calls
= false;
13919 if (deferred_mark_used_calls
)
13924 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13926 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13932 /* Create the FUNCTION_DECL for a function definition.
13933 DECLSPECS and DECLARATOR are the parts of the declaration;
13934 they describe the return type and the name of the function,
13935 but twisted together in a fashion that parallels the syntax of C.
13937 This function creates a binding context for the function body
13938 as well as setting up the FUNCTION_DECL in current_function_decl.
13940 Returns a FUNCTION_DECL on success.
13942 If the DECLARATOR is not suitable for a function (it defines a datum
13943 instead), we return 0, which tells yyparse to report a parse error.
13945 May return void_type_node indicating that this method is actually
13946 a friend. See grokfield for more details.
13948 Came here with a `.pushlevel' .
13950 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13951 CHANGES TO CODE IN `grokfield'. */
13954 grokmethod (cp_decl_specifier_seq
*declspecs
,
13955 const cp_declarator
*declarator
, tree attrlist
)
13957 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13960 if (fndecl
== error_mark_node
)
13961 return error_mark_node
;
13963 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13965 error ("invalid member function declaration");
13966 return error_mark_node
;
13970 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13972 /* Pass friends other than inline friend functions back. */
13973 if (fndecl
== void_type_node
)
13976 if (DECL_IN_AGGR_P (fndecl
))
13978 if (DECL_CLASS_SCOPE_P (fndecl
))
13979 error ("%qD is already defined in class %qT", fndecl
,
13980 DECL_CONTEXT (fndecl
));
13981 return error_mark_node
;
13984 check_template_shadow (fndecl
);
13986 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13987 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13989 /* We process method specializations in finish_struct_1. */
13990 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13992 fndecl
= push_template_decl (fndecl
);
13993 if (fndecl
== error_mark_node
)
13997 if (! DECL_FRIEND_P (fndecl
))
13999 if (DECL_CHAIN (fndecl
))
14001 fndecl
= copy_node (fndecl
);
14002 TREE_CHAIN (fndecl
) = NULL_TREE
;
14006 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14008 DECL_IN_AGGR_P (fndecl
) = 1;
14013 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14014 we can lay it out later, when and if its type becomes complete. */
14017 maybe_register_incomplete_var (tree var
)
14019 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
14021 /* Keep track of variables with incomplete types. */
14022 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14023 && DECL_EXTERNAL (var
))
14025 tree inner_type
= TREE_TYPE (var
);
14027 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14028 inner_type
= TREE_TYPE (inner_type
);
14029 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14031 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14032 /* RTTI TD entries are created while defining the type_info. */
14033 || (TYPE_LANG_SPECIFIC (inner_type
)
14034 && TYPE_BEING_DEFINED (inner_type
)))
14036 incomplete_var iv
= {var
, inner_type
};
14037 VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, iv
);
14042 /* Called when a class type (given by TYPE) is defined. If there are
14043 any existing VAR_DECLs whose type has been completed by this
14044 declaration, update them now. */
14047 complete_vars (tree type
)
14050 incomplete_var
*iv
;
14052 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
14054 if (same_type_p (type
, iv
->incomplete_type
))
14056 tree var
= iv
->decl
;
14057 tree type
= TREE_TYPE (var
);
14058 /* Complete the type of the variable. The VAR_DECL itself
14059 will be laid out in expand_expr. */
14060 complete_type (type
);
14061 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14062 /* Remove this entry from the list. */
14063 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
14069 /* Check for pending declarations which may have abstract type. */
14070 complete_type_check_abstract (type
);
14073 /* If DECL is of a type which needs a cleanup, build and return an
14074 expression to perform that cleanup here. Return NULL_TREE if no
14075 cleanup need be done. */
14078 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14084 /* Assume no cleanup is required. */
14085 cleanup
= NULL_TREE
;
14087 if (error_operand_p (decl
))
14090 /* Handle "__attribute__((cleanup))". We run the cleanup function
14091 before the destructor since the destructor is what actually
14092 terminates the lifetime of the object. */
14093 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14100 /* Get the name specified by the user for the cleanup function. */
14101 id
= TREE_VALUE (TREE_VALUE (attr
));
14102 /* Look up the name to find the cleanup function to call. It is
14103 important to use lookup_name here because that is what is
14104 used in c-common.c:handle_cleanup_attribute when performing
14105 initial checks on the attribute. Note that those checks
14106 include ensuring that the function found is not an overloaded
14107 function, or an object with an overloaded call operator,
14108 etc.; we can rely on the fact that the function found is an
14109 ordinary FUNCTION_DECL. */
14110 fn
= lookup_name (id
);
14111 arg
= build_address (decl
);
14113 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14114 if (cleanup
== error_mark_node
)
14115 return error_mark_node
;
14117 /* Handle ordinary C++ destructors. */
14118 type
= TREE_TYPE (decl
);
14119 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
14121 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14122 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
14123 && CLASSTYPE_VBASECLASSES (type
));
14127 if (TREE_CODE (type
) == ARRAY_TYPE
)
14130 addr
= build_address (decl
);
14132 /* Optimize for space over speed here. */
14133 if (!has_vbases
|| flag_expensive_optimizations
)
14134 flags
|= LOOKUP_NONVIRTUAL
;
14136 call
= build_delete (TREE_TYPE (addr
), addr
,
14137 sfk_complete_destructor
, flags
, 0, complain
);
14138 if (call
== error_mark_node
)
14139 cleanup
= error_mark_node
;
14141 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14146 /* build_delete sets the location of the destructor call to the
14147 current location, even though the destructor is going to be
14148 called later, at the end of the current scope. This can lead to
14149 a "jumpy" behaviour for users of debuggers when they step around
14150 the end of the block. So let's unset the location of the
14151 destructor call instead. */
14152 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14153 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14158 /* When a stmt has been parsed, this function is called. */
14165 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14166 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14167 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14170 static_fn_type (tree memfntype
)
14175 if (TYPE_PTRMEMFUNC_P (memfntype
))
14176 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14177 if (POINTER_TYPE_P (memfntype
)
14178 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14179 memfntype
= TREE_TYPE (memfntype
);
14180 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14182 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14183 args
= TYPE_ARG_TYPES (memfntype
);
14184 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14185 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
14186 fntype
= (cp_build_type_attribute_variant
14187 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14188 fntype
= (build_exception_variant
14189 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14193 /* DECL was originally constructed as a non-static member function,
14194 but turned out to be static. Update it accordingly. */
14197 revert_static_member_fn (tree decl
)
14199 tree stype
= static_fn_type (decl
);
14200 cp_cv_quals quals
= type_memfn_quals (stype
);
14202 if (quals
!= TYPE_UNQUALIFIED
)
14203 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
14205 TREE_TYPE (decl
) = stype
;
14207 if (DECL_ARGUMENTS (decl
))
14208 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14209 DECL_STATIC_FUNCTION_P (decl
) = 1;
14212 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14213 one of the language-independent trees. */
14215 enum cp_tree_node_structure_enum
14216 cp_tree_node_structure (union lang_tree_node
* t
)
14218 switch (TREE_CODE (&t
->generic
))
14220 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14221 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14222 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14223 case OVERLOAD
: return TS_CP_OVERLOAD
;
14224 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14225 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14226 case BASELINK
: return TS_CP_BASELINK
;
14227 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14228 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14229 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14230 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14231 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14232 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14233 default: return TS_CP_GENERIC
;
14237 /* Build the void_list_node (void_type_node having been created). */
14239 build_void_list_node (void)
14241 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14246 cp_missing_noreturn_ok_p (tree decl
)
14248 /* A missing noreturn is ok for the `main' function. */
14249 return DECL_MAIN_P (decl
);
14252 /* Return the COMDAT group into which DECL should be placed. */
14255 cxx_comdat_group (tree decl
)
14259 /* Virtual tables, construction virtual tables, and virtual table
14260 tables all go in a single COMDAT group, named after the primary
14262 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
14263 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14264 /* For all other DECLs, the COMDAT group is the mangled name of the
14265 declaration itself. */
14268 while (DECL_THUNK_P (decl
))
14270 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14271 into the same section as the target function. In that case
14272 we must return target's name. */
14273 tree target
= THUNK_TARGET (decl
);
14274 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14275 && DECL_SECTION_NAME (target
) != NULL
14276 && DECL_ONE_ONLY (target
))
14281 name
= DECL_ASSEMBLER_NAME (decl
);
14287 #include "gt-cp-decl.h"