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 /* If the olddecl is a version, so is the newdecl. */
2311 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2312 && DECL_FUNCTION_VERSIONED (olddecl
))
2314 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2315 /* newdecl will be purged and is no longer a version. */
2316 delete_function_version (newdecl
);
2319 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2323 function_size
= sizeof (struct tree_decl_common
);
2325 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2326 (char *) newdecl
+ sizeof (struct tree_common
),
2327 function_size
- sizeof (struct tree_common
));
2329 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2330 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2331 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2332 if (new_template_info
)
2333 /* If newdecl is a template instantiation, it is possible that
2334 the following sequence of events has occurred:
2336 o A friend function was declared in a class template. The
2337 class template was instantiated.
2339 o The instantiation of the friend declaration was
2340 recorded on the instantiation list, and is newdecl.
2342 o Later, however, instantiate_class_template called pushdecl
2343 on the newdecl to perform name injection. But, pushdecl in
2344 turn called duplicate_decls when it discovered that another
2345 declaration of a global function with the same name already
2348 o Here, in duplicate_decls, we decided to clobber newdecl.
2350 If we're going to do that, we'd better make sure that
2351 olddecl, and not newdecl, is on the list of
2352 instantiations so that if we try to do the instantiation
2353 again we won't get the clobbered declaration. */
2354 reregister_specialization (newdecl
,
2360 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2361 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2362 (char *) newdecl
+ sizeof (struct tree_common
),
2363 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2364 switch (TREE_CODE (olddecl
))
2374 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2375 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2376 size
- sizeof (struct tree_decl_common
)
2377 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2381 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2382 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2383 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2384 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2388 DECL_UID (olddecl
) = olddecl_uid
;
2390 DECL_FRIEND_P (olddecl
) = 1;
2393 DECL_ANTICIPATED (olddecl
) = 1;
2394 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2397 /* NEWDECL contains the merged attribute lists.
2398 Update OLDDECL to be the same. */
2399 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2401 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2402 so that encode_section_info has a chance to look at the new decl
2403 flags and attributes. */
2404 if (DECL_RTL_SET_P (olddecl
)
2405 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2406 || (TREE_CODE (olddecl
) == VAR_DECL
2407 && TREE_STATIC (olddecl
))))
2408 make_decl_rtl (olddecl
);
2410 /* The NEWDECL will no longer be needed. Because every out-of-class
2411 declaration of a member results in a call to duplicate_decls,
2412 freeing these nodes represents in a significant savings. */
2418 /* Return zero if the declaration NEWDECL is valid
2419 when the declaration OLDDECL (assumed to be for the same name)
2420 has already been seen.
2421 Otherwise return an error message format string with a %s
2422 where the identifier should go. */
2425 redeclaration_error_message (tree newdecl
, tree olddecl
)
2427 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2429 /* Because C++ can put things into name space for free,
2430 constructs like "typedef struct foo { ... } foo"
2431 would look like an erroneous redeclaration. */
2432 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2435 return G_("redefinition of %q#D");
2437 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2439 /* If this is a pure function, its olddecl will actually be
2440 the original initialization to `0' (which we force to call
2441 abort()). Don't complain about redefinition in this case. */
2442 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2443 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2446 /* If both functions come from different namespaces, this is not
2447 a redeclaration - this is a conflict with a used function. */
2448 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2449 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2450 && ! decls_match (olddecl
, newdecl
))
2451 return G_("%qD conflicts with used function");
2453 /* We'll complain about linkage mismatches in
2454 warn_extern_redeclared_static. */
2456 /* Defining the same name twice is no good. */
2457 if (DECL_INITIAL (olddecl
) != NULL_TREE
2458 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2460 if (DECL_NAME (olddecl
) == NULL_TREE
)
2461 return G_("%q#D not declared in class");
2462 else if (!GNU_INLINE_P (olddecl
)
2463 || GNU_INLINE_P (newdecl
))
2464 return G_("redefinition of %q#D");
2467 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2469 bool olda
= GNU_INLINE_P (olddecl
);
2470 bool newa
= GNU_INLINE_P (newdecl
);
2475 return G_("%q+D redeclared inline with "
2476 "%<gnu_inline%> attribute");
2478 return G_("%q+D redeclared inline without "
2479 "%<gnu_inline%> attribute");
2483 check_abi_tag_redeclaration
2484 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2485 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2489 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2493 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2495 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2496 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2497 return G_("redefinition of %q#D");
2501 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2502 || (DECL_TEMPLATE_RESULT (newdecl
)
2503 == DECL_TEMPLATE_RESULT (olddecl
)))
2506 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2507 if (DECL_TEMPLATE_INFO (nt
))
2508 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2509 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2510 if (DECL_TEMPLATE_INFO (ot
))
2511 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2512 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2513 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2514 return G_("redefinition of %q#D");
2516 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2518 bool olda
= GNU_INLINE_P (ot
);
2519 bool newa
= GNU_INLINE_P (nt
);
2524 return G_("%q+D redeclared inline with "
2525 "%<gnu_inline%> attribute");
2527 return G_("%q+D redeclared inline without "
2528 "%<gnu_inline%> attribute");
2532 /* Core issue #226 (C++0x):
2534 If a friend function template declaration specifies a
2535 default template-argument, that declaration shall be a
2536 definition and shall be the only declaration of the
2537 function template in the translation unit. */
2538 if ((cxx_dialect
!= cxx98
)
2539 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2540 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2541 /*is_primary=*/true,
2542 /*is_partial=*/false,
2543 /*is_friend_decl=*/2))
2544 return G_("redeclaration of friend %q#D "
2545 "may not have default template arguments");
2549 else if (TREE_CODE (newdecl
) == VAR_DECL
2550 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2551 && (! DECL_LANG_SPECIFIC (olddecl
)
2552 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2553 || DECL_THREAD_LOCAL_P (newdecl
)))
2555 /* Only variables can be thread-local, and all declarations must
2556 agree on this property. */
2557 if (DECL_THREAD_LOCAL_P (newdecl
))
2558 return G_("thread-local declaration of %q#D follows "
2559 "non-thread-local declaration");
2561 return G_("non-thread-local declaration of %q#D follows "
2562 "thread-local declaration");
2564 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2566 /* The objects have been declared at namespace scope. If either
2567 is a member of an anonymous union, then this is an invalid
2568 redeclaration. For example:
2574 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2575 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2576 return G_("redeclaration of %q#D");
2577 /* If at least one declaration is a reference, there is no
2578 conflict. For example:
2584 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2586 /* Reject two definitions. */
2587 return G_("redefinition of %q#D");
2591 /* Objects declared with block scope: */
2592 /* Reject two definitions, and reject a definition
2593 together with an external reference. */
2594 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2595 return G_("redeclaration of %q#D");
2600 /* Hash and equality functions for the named_label table. */
2603 named_label_entry_hash (const void *data
)
2605 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2606 return DECL_UID (ent
->label_decl
);
2610 named_label_entry_eq (const void *a
, const void *b
)
2612 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2613 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2614 return ent_a
->label_decl
== ent_b
->label_decl
;
2617 /* Create a new label, named ID. */
2620 make_label_decl (tree id
, int local_p
)
2622 struct named_label_entry
*ent
;
2626 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2628 DECL_CONTEXT (decl
) = current_function_decl
;
2629 DECL_MODE (decl
) = VOIDmode
;
2630 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2632 /* Say where one reference is to the label, for the sake of the
2633 error if it is not defined. */
2634 DECL_SOURCE_LOCATION (decl
) = input_location
;
2636 /* Record the fact that this identifier is bound to this label. */
2637 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2639 /* Create the label htab for the function on demand. */
2641 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2642 named_label_entry_eq
, NULL
);
2644 /* Record this label on the list of labels used in this function.
2645 We do this before calling make_label_decl so that we get the
2646 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2647 ent
= ggc_alloc_cleared_named_label_entry ();
2648 ent
->label_decl
= decl
;
2650 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2651 gcc_assert (*slot
== NULL
);
2657 /* Look for a label named ID in the current function. If one cannot
2658 be found, create one. (We keep track of used, but undefined,
2659 labels, and complain about them at the end of a function.) */
2662 lookup_label_1 (tree id
)
2666 /* You can't use labels at global scope. */
2667 if (current_function_decl
== NULL_TREE
)
2669 error ("label %qE referenced outside of any function", id
);
2673 /* See if we've already got this label. */
2674 decl
= IDENTIFIER_LABEL_VALUE (id
);
2675 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2678 decl
= make_label_decl (id
, /*local_p=*/0);
2682 /* Wrapper for lookup_label_1. */
2685 lookup_label (tree id
)
2688 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2689 ret
= lookup_label_1 (id
);
2690 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2694 /* Declare a local label named ID. */
2697 declare_local_label (tree id
)
2700 cp_label_binding bind
;
2702 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2703 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2704 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2706 decl
= make_label_decl (id
, /*local_p=*/1);
2708 VEC_safe_push (cp_label_binding
, gc
, current_binding_level
->shadowed_labels
,
2714 /* Returns nonzero if it is ill-formed to jump past the declaration of
2715 DECL. Returns 2 if it's also a real problem. */
2718 decl_jump_unsafe (tree decl
)
2720 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2721 with automatic storage duration is not in scope to a point where it is
2722 in scope is ill-formed unless the variable has scalar type, class type
2723 with a trivial default constructor and a trivial destructor, a
2724 cv-qualified version of one of these types, or an array of one of the
2725 preceding types and is declared without an initializer (8.5). */
2726 tree type
= TREE_TYPE (decl
);
2728 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2729 || type
== error_mark_node
)
2732 type
= strip_array_types (type
);
2734 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2737 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2743 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2746 identify_goto (tree decl
, const location_t
*locus
)
2749 permerror (input_location
, "jump to label %qD", decl
);
2751 permerror (input_location
, "jump to case label");
2753 permerror (*locus
, " from here");
2756 /* Check that a single previously seen jump to a newly defined label
2757 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2758 the jump context; NAMES are the names in scope in LEVEL at the jump
2759 context; LOCUS is the source position of the jump or 0. Returns
2760 true if all is well. */
2763 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2764 bool exited_omp
, const location_t
*locus
)
2766 cp_binding_level
*b
;
2767 bool identified
= false, saw_eh
= false, saw_omp
= false;
2771 identify_goto (decl
, locus
);
2772 error (" exits OpenMP structured block");
2773 identified
= saw_omp
= true;
2776 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2778 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2780 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2781 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2782 : TREE_CHAIN (new_decls
)))
2784 int problem
= decl_jump_unsafe (new_decls
);
2790 identify_goto (decl
, locus
);
2794 error (" crosses initialization of %q+#D", new_decls
);
2796 permerror (input_location
, " enters scope of %q+#D which has "
2797 "non-trivial destructor", new_decls
);
2802 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2806 identify_goto (decl
, locus
);
2809 if (b
->kind
== sk_try
)
2810 error (" enters try block");
2812 error (" enters catch block");
2815 if (b
->kind
== sk_omp
&& !saw_omp
)
2819 identify_goto (decl
, locus
);
2822 error (" enters OpenMP structured block");
2831 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2833 check_previous_goto_1 (decl
, use
->binding_level
,
2834 use
->names_in_scope
, use
->in_omp_scope
,
2835 &use
->o_goto_locus
);
2839 check_switch_goto (cp_binding_level
* level
)
2841 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2844 /* Check that a new jump to a label DECL is OK. Called by
2845 finish_goto_stmt. */
2848 check_goto (tree decl
)
2850 struct named_label_entry
*ent
, dummy
;
2851 bool saw_catch
= false, identified
= false;
2855 /* We can't know where a computed goto is jumping.
2856 So we assume that it's OK. */
2857 if (TREE_CODE (decl
) != LABEL_DECL
)
2860 /* We didn't record any information about this label when we created it,
2861 and there's not much point since it's trivial to analyze as a return. */
2862 if (decl
== cdtor_label
)
2865 dummy
.label_decl
= decl
;
2866 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2867 gcc_assert (ent
!= NULL
);
2869 /* If the label hasn't been defined yet, defer checking. */
2870 if (! DECL_INITIAL (decl
))
2872 struct named_label_use_entry
*new_use
;
2874 /* Don't bother creating another use if the last goto had the
2875 same data, and will therefore create the same set of errors. */
2877 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2880 new_use
= ggc_alloc_named_label_use_entry ();
2881 new_use
->binding_level
= current_binding_level
;
2882 new_use
->names_in_scope
= current_binding_level
->names
;
2883 new_use
->o_goto_locus
= input_location
;
2884 new_use
->in_omp_scope
= false;
2886 new_use
->next
= ent
->uses
;
2887 ent
->uses
= new_use
;
2891 if (ent
->in_try_scope
|| ent
->in_catch_scope
2892 || ent
->in_omp_scope
|| !VEC_empty (tree
, ent
->bad_decls
))
2894 permerror (input_location
, "jump to label %q+D", decl
);
2895 permerror (input_location
, " from here");
2899 FOR_EACH_VEC_ELT (tree
, ent
->bad_decls
, ix
, bad
)
2901 int u
= decl_jump_unsafe (bad
);
2903 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2905 /* Can't skip init of __exception_info. */
2906 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2910 error (" skips initialization of %q+#D", bad
);
2912 permerror (input_location
, " enters scope of %q+#D which has "
2913 "non-trivial destructor", bad
);
2916 if (ent
->in_try_scope
)
2917 error (" enters try block");
2918 else if (ent
->in_catch_scope
&& !saw_catch
)
2919 error (" enters catch block");
2921 if (ent
->in_omp_scope
)
2922 error (" enters OpenMP structured block");
2923 else if (flag_openmp
)
2925 cp_binding_level
*b
;
2926 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2928 if (b
== ent
->binding_level
)
2930 if (b
->kind
== sk_omp
)
2934 permerror (input_location
, "jump to label %q+D", decl
);
2935 permerror (input_location
, " from here");
2938 error (" exits OpenMP structured block");
2945 /* Check that a return is ok wrt OpenMP structured blocks.
2946 Called by finish_return_stmt. Returns true if all is well. */
2949 check_omp_return (void)
2951 cp_binding_level
*b
;
2952 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2953 if (b
->kind
== sk_omp
)
2955 error ("invalid exit from OpenMP structured block");
2958 else if (b
->kind
== sk_function_parms
)
2963 /* Define a label, specifying the location in the source file.
2964 Return the LABEL_DECL node for the label. */
2967 define_label_1 (location_t location
, tree name
)
2969 struct named_label_entry
*ent
, dummy
;
2970 cp_binding_level
*p
;
2973 decl
= lookup_label (name
);
2975 dummy
.label_decl
= decl
;
2976 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2977 gcc_assert (ent
!= NULL
);
2979 /* After labels, make any new cleanups in the function go into their
2980 own new (temporary) binding contour. */
2981 for (p
= current_binding_level
;
2982 p
->kind
!= sk_function_parms
;
2984 p
->more_cleanups_ok
= 0;
2986 if (name
== get_identifier ("wchar_t"))
2987 permerror (input_location
, "label named wchar_t");
2989 if (DECL_INITIAL (decl
) != NULL_TREE
)
2991 error ("duplicate label %qD", decl
);
2992 return error_mark_node
;
2996 struct named_label_use_entry
*use
;
2998 /* Mark label as having been defined. */
2999 DECL_INITIAL (decl
) = error_mark_node
;
3000 /* Say where in the source. */
3001 DECL_SOURCE_LOCATION (decl
) = location
;
3003 ent
->binding_level
= current_binding_level
;
3004 ent
->names_in_scope
= current_binding_level
->names
;
3006 for (use
= ent
->uses
; use
; use
= use
->next
)
3007 check_previous_goto (decl
, use
);
3014 /* Wrapper for define_label_1. */
3017 define_label (location_t location
, tree name
)
3020 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3021 ret
= define_label_1 (location
, name
);
3022 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3029 cp_binding_level
*level
;
3030 struct cp_switch
*next
;
3031 /* The SWITCH_STMT being built. */
3033 /* A splay-tree mapping the low element of a case range to the high
3034 element, or NULL_TREE if there is no high element. Used to
3035 determine whether or not a new case label duplicates an old case
3036 label. We need a tree, rather than simply a hash table, because
3037 of the GNU case range extension. */
3041 /* A stack of the currently active switch statements. The innermost
3042 switch statement is on the top of the stack. There is no need to
3043 mark the stack for garbage collection because it is only active
3044 during the processing of the body of a function, and we never
3045 collect at that point. */
3047 static struct cp_switch
*switch_stack
;
3049 /* Called right after a switch-statement condition is parsed.
3050 SWITCH_STMT is the switch statement being parsed. */
3053 push_switch (tree switch_stmt
)
3055 struct cp_switch
*p
= XNEW (struct cp_switch
);
3056 p
->level
= current_binding_level
;
3057 p
->next
= switch_stack
;
3058 p
->switch_stmt
= switch_stmt
;
3059 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3066 struct cp_switch
*cs
= switch_stack
;
3067 location_t switch_location
;
3069 /* Emit warnings as needed. */
3070 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3071 if (!processing_template_decl
)
3072 c_do_switch_warnings (cs
->cases
, switch_location
,
3073 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3074 SWITCH_STMT_COND (cs
->switch_stmt
));
3076 splay_tree_delete (cs
->cases
);
3077 switch_stack
= switch_stack
->next
;
3081 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3082 condition. Note that if TYPE and VALUE are already integral we don't
3083 really do the conversion because the language-independent
3084 warning/optimization code will work better that way. */
3087 case_conversion (tree type
, tree value
)
3089 if (value
== NULL_TREE
)
3092 if (cxx_dialect
>= cxx0x
3093 && (SCOPED_ENUM_P (type
)
3094 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3096 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3097 type
= type_promotes_to (type
);
3098 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3100 return cxx_constant_value (value
);
3103 /* Note that we've seen a definition of a case label, and complain if this
3104 is a bad place for one. */
3107 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3110 cp_binding_level
*p
;
3113 if (processing_template_decl
)
3117 /* For templates, just add the case label; we'll do semantic
3118 analysis at instantiation-time. */
3119 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3120 return add_stmt (build_case_label (low_value
, high_value
, label
));
3123 /* Find the condition on which this switch statement depends. */
3124 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3125 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3126 cond
= TREE_VALUE (cond
);
3128 if (!check_switch_goto (switch_stack
->level
))
3129 return error_mark_node
;
3131 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3133 low_value
= case_conversion (type
, low_value
);
3134 high_value
= case_conversion (type
, high_value
);
3136 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3137 low_value
, high_value
);
3139 /* After labels, make any new cleanups in the function go into their
3140 own new (temporary) binding contour. */
3141 for (p
= current_binding_level
;
3142 p
->kind
!= sk_function_parms
;
3144 p
->more_cleanups_ok
= 0;
3149 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3152 typename_hash (const void* k
)
3155 const_tree
const t
= (const_tree
) k
;
3157 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3158 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3163 typedef struct typename_info
{
3171 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3172 really of type `typename_info*' */
3175 typename_compare (const void * k1
, const void * k2
)
3177 const_tree
const t1
= (const_tree
) k1
;
3178 const typename_info
*const t2
= (const typename_info
*) k2
;
3180 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3181 && TYPE_CONTEXT (t1
) == t2
->scope
3182 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3183 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3184 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3187 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3188 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3190 Returns the new TYPENAME_TYPE. */
3192 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3195 build_typename_type (tree context
, tree name
, tree fullname
,
3196 enum tag_types tag_type
)
3204 if (typename_htab
== NULL
)
3205 typename_htab
= htab_create_ggc (61, &typename_hash
,
3206 &typename_compare
, NULL
);
3208 ti
.scope
= FROB_CONTEXT (context
);
3210 ti
.template_id
= fullname
;
3211 ti
.enum_p
= tag_type
== enum_type
;
3212 ti
.class_p
= (tag_type
== class_type
3213 || tag_type
== record_type
3214 || tag_type
== union_type
);
3215 hash
= (htab_hash_pointer (ti
.scope
)
3216 ^ htab_hash_pointer (ti
.name
));
3218 /* See if we already have this type. */
3219 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3224 /* Build the TYPENAME_TYPE. */
3225 t
= cxx_make_type (TYPENAME_TYPE
);
3226 TYPE_CONTEXT (t
) = ti
.scope
;
3227 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3228 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3229 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3231 /* Build the corresponding TYPE_DECL. */
3232 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3233 TYPE_NAME (TREE_TYPE (d
)) = d
;
3234 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3235 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3236 DECL_ARTIFICIAL (d
) = 1;
3238 /* Store it in the hash table. */
3241 /* TYPENAME_TYPEs must always be compared structurally, because
3242 they may or may not resolve down to another type depending on
3243 the currently open classes. */
3244 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3250 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3251 provided to name the type. Returns an appropriate type, unless an
3252 error occurs, in which case error_mark_node is returned. If we
3253 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3254 return that, rather than the _TYPE it corresponds to, in other
3255 cases we look through the type decl. If TF_ERROR is set, complain
3256 about errors, otherwise be quiet. */
3259 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3260 tsubst_flags_t complain
)
3266 if (name
== error_mark_node
3267 || context
== NULL_TREE
3268 || context
== error_mark_node
)
3269 return error_mark_node
;
3273 if (!(TYPE_LANG_SPECIFIC (name
)
3274 && (CLASSTYPE_IS_TEMPLATE (name
)
3275 || CLASSTYPE_USE_TEMPLATE (name
))))
3276 name
= TYPE_IDENTIFIER (name
);
3278 /* Create a TEMPLATE_ID_EXPR for the type. */
3279 name
= build_nt (TEMPLATE_ID_EXPR
,
3280 CLASSTYPE_TI_TEMPLATE (name
),
3281 CLASSTYPE_TI_ARGS (name
));
3283 else if (TREE_CODE (name
) == TYPE_DECL
)
3284 name
= DECL_NAME (name
);
3288 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3290 name
= TREE_OPERAND (name
, 0);
3291 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3292 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3293 else if (TREE_CODE (name
) == OVERLOAD
)
3295 if (complain
& tf_error
)
3296 error ("%qD is not a type", name
);
3297 return error_mark_node
;
3300 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3302 if (complain
& tf_error
)
3303 error ("%qD used without template parameters", name
);
3304 return error_mark_node
;
3306 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3307 gcc_assert (TYPE_P (context
));
3309 if (!MAYBE_CLASS_TYPE_P (context
))
3311 if (complain
& tf_error
)
3312 error ("%q#T is not a class", context
);
3313 return error_mark_node
;
3316 /* When the CONTEXT is a dependent type, NAME could refer to a
3317 dependent base class of CONTEXT. But look inside it anyway
3318 if CONTEXT is a currently open scope, in case it refers to a
3319 member of the current instantiation or a non-dependent base;
3320 lookup will stop when we hit a dependent base. */
3321 if (!dependent_scope_p (context
))
3322 /* We should only set WANT_TYPE when we're a nested typename type.
3323 Then we can give better diagnostics if we find a non-type. */
3324 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3328 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3329 return build_typename_type (context
, name
, fullname
, tag_type
);
3331 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3335 if (complain
& tf_error
)
3336 error (want_template
? G_("no class template named %q#T in %q#T")
3337 : G_("no type named %q#T in %q#T"), name
, context
);
3338 return error_mark_node
;
3341 /* Pull out the template from an injected-class-name (or multiple). */
3343 t
= maybe_get_template_decl_from_type_decl (t
);
3345 if (TREE_CODE (t
) == TREE_LIST
)
3347 if (complain
& tf_error
)
3349 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3350 print_candidates (t
);
3352 return error_mark_node
;
3355 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3357 if (complain
& tf_error
)
3358 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3360 return error_mark_node
;
3362 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3364 if (complain
& tf_error
)
3365 error ("%<typename %T::%D%> names %q#T, which is not a type",
3367 return error_mark_node
;
3370 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3371 return error_mark_node
;
3373 /* If we are currently parsing a template and if T is a typedef accessed
3374 through CONTEXT then we need to remember and check access of T at
3375 template instantiation time. */
3376 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3379 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3381 /*entering_scope=*/0,
3382 tf_warning_or_error
| tf_user
);
3384 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3387 maybe_record_typedef_use (t
);
3392 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3393 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3394 in which case error_mark_node is returned.
3396 If PARM_LIST is non-NULL, also make sure that the template parameter
3397 list of TEMPLATE_DECL matches.
3399 If COMPLAIN zero, don't complain about any errors that occur. */
3402 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3403 tsubst_flags_t complain
)
3409 name
= TYPE_IDENTIFIER (name
);
3410 else if (DECL_P (name
))
3411 name
= DECL_NAME (name
);
3412 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3414 if (!dependent_type_p (context
)
3415 || currently_open_class (context
))
3417 tree tmpl
= NULL_TREE
;
3419 if (MAYBE_CLASS_TYPE_P (context
))
3420 tmpl
= lookup_field (context
, name
, 0, false);
3422 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3423 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3425 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3427 if (complain
& tf_error
)
3428 error ("no class template named %q#T in %q#T", name
, context
);
3429 return error_mark_node
;
3433 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3435 if (complain
& tf_error
)
3437 error ("template parameters do not match template");
3438 error ("%q+D declared here", tmpl
);
3440 return error_mark_node
;
3443 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3445 return error_mark_node
;
3450 /* Build the UNBOUND_CLASS_TEMPLATE. */
3451 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3452 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3453 TREE_TYPE (t
) = NULL_TREE
;
3454 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3456 /* Build the corresponding TEMPLATE_DECL. */
3457 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3458 TYPE_NAME (TREE_TYPE (d
)) = d
;
3459 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3460 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3461 DECL_ARTIFICIAL (d
) = 1;
3462 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3469 /* Push the declarations of builtin types into the namespace.
3470 RID_INDEX is the index of the builtin type in the array
3471 RID_POINTERS. NAME is the name used when looking up the builtin
3472 type. TYPE is the _TYPE node for the builtin type. */
3475 record_builtin_type (enum rid rid_index
,
3479 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3480 tree tdecl
= NULL_TREE
;
3482 if ((int) rid_index
< (int) RID_MAX
)
3483 rname
= ridpointers
[(int) rid_index
];
3485 tname
= get_identifier (name
);
3487 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3488 eliminated. Built-in types should not be looked up name; their
3489 names are keywords that the parser can recognize. However, there
3490 is code in c-common.c that uses identifier_global_value to look
3491 up built-in types by name. */
3494 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3495 DECL_ARTIFICIAL (tdecl
) = 1;
3496 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3502 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3503 DECL_ARTIFICIAL (tdecl
) = 1;
3505 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3508 if (!TYPE_NAME (type
))
3509 TYPE_NAME (type
) = tdecl
;
3512 debug_hooks
->type_decl (tdecl
, 0);
3515 /* Record one of the standard Java types.
3516 * Declare it as having the given NAME.
3517 * If SIZE > 0, it is the size of one of the integral types;
3518 * otherwise it is the negative of the size of one of the other types. */
3521 record_builtin_java_type (const char* name
, int size
)
3526 type
= build_nonstandard_integer_type (size
, 0);
3527 type
= build_distinct_type_copy (type
);
3529 else if (size
> -32)
3532 /* "__java_char" or ""__java_boolean". */
3533 type
= build_nonstandard_integer_type (-size
, 1);
3534 type
= build_distinct_type_copy (type
);
3535 /* Get the signed type cached and attached to the unsigned type,
3536 so it doesn't get garbage-collected at "random" times,
3537 causing potential codegen differences out of different UIDs
3538 and different alias set numbers. */
3539 stype
= build_nonstandard_integer_type (-size
, 0);
3540 stype
= build_distinct_type_copy (stype
);
3541 TREE_CHAIN (type
) = stype
;
3542 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3545 { /* "__java_float" or ""__java_double". */
3546 type
= make_node (REAL_TYPE
);
3547 TYPE_PRECISION (type
) = - size
;
3550 record_builtin_type (RID_MAX
, name
, type
);
3551 decl
= TYPE_NAME (type
);
3553 /* Suppress generate debug symbol entries for these types,
3554 since for normal C++ they are just clutter.
3555 However, push_lang_context undoes this if extern "Java" is seen. */
3556 DECL_IGNORED_P (decl
) = 1;
3558 TYPE_FOR_JAVA (type
) = 1;
3562 /* Push a type into the namespace so that the back ends ignore it. */
3565 record_unknown_type (tree type
, const char* name
)
3567 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3568 TYPE_DECL
, get_identifier (name
), type
));
3569 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3570 DECL_IGNORED_P (decl
) = 1;
3571 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3572 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3573 TYPE_ALIGN (type
) = 1;
3574 TYPE_USER_ALIGN (type
) = 0;
3575 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3578 /* A string for which we should create an IDENTIFIER_NODE at
3581 typedef struct predefined_identifier
3583 /* The name of the identifier. */
3584 const char *const name
;
3585 /* The place where the IDENTIFIER_NODE should be stored. */
3587 /* Nonzero if this is the name of a constructor or destructor. */
3588 const int ctor_or_dtor_p
;
3589 } predefined_identifier
;
3591 /* Create all the predefined identifiers. */
3594 initialize_predefined_identifiers (void)
3596 const predefined_identifier
*pid
;
3598 /* A table of identifiers to create at startup. */
3599 static const predefined_identifier predefined_identifiers
[] = {
3600 { "C++", &lang_name_cplusplus
, 0 },
3601 { "C", &lang_name_c
, 0 },
3602 { "Java", &lang_name_java
, 0 },
3603 /* Some of these names have a trailing space so that it is
3604 impossible for them to conflict with names written by users. */
3605 { "__ct ", &ctor_identifier
, 1 },
3606 { "__base_ctor ", &base_ctor_identifier
, 1 },
3607 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3608 { "__dt ", &dtor_identifier
, 1 },
3609 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3610 { "__base_dtor ", &base_dtor_identifier
, 1 },
3611 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3612 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3613 { "nelts", &nelts_identifier
, 0 },
3614 { THIS_NAME
, &this_identifier
, 0 },
3615 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3616 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3617 { "_vptr", &vptr_identifier
, 0 },
3618 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3619 { "::", &global_scope_name
, 0 },
3620 { "std", &std_identifier
, 0 },
3624 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3626 *pid
->node
= get_identifier (pid
->name
);
3627 if (pid
->ctor_or_dtor_p
)
3628 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3632 /* Create the predefined scalar types of C,
3633 and some nodes representing standard constants (0, 1, (void *)0).
3634 Initialize the global binding level.
3635 Make definitions for built-in primitive functions. */
3638 cxx_init_decl_processing (void)
3641 tree void_ftype_ptr
;
3643 /* Create all the identifiers we need. */
3644 initialize_predefined_identifiers ();
3646 /* Create the global variables. */
3647 push_to_top_level ();
3649 current_function_decl
= NULL_TREE
;
3650 current_binding_level
= NULL
;
3651 /* Enter the global namespace. */
3652 gcc_assert (global_namespace
== NULL_TREE
);
3653 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3655 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3656 TREE_PUBLIC (global_namespace
) = 1;
3657 begin_scope (sk_namespace
, global_namespace
);
3659 if (flag_visibility_ms_compat
)
3660 default_visibility
= VISIBILITY_HIDDEN
;
3663 current_lang_name
= lang_name_c
;
3665 /* Create the `std' namespace. */
3666 push_namespace (std_identifier
);
3667 std_node
= current_namespace
;
3670 c_common_nodes_and_builtins ();
3672 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3673 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3674 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3675 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3676 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3677 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3678 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3679 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3681 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3683 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3684 truthvalue_type_node
= boolean_type_node
;
3685 truthvalue_false_node
= boolean_false_node
;
3686 truthvalue_true_node
= boolean_true_node
;
3688 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3689 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3690 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3693 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3696 delta_type_node
= ptrdiff_type_node
;
3697 vtable_index_type
= ptrdiff_type_node
;
3699 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3700 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3701 void_ftype_ptr
= build_function_type_list (void_type_node
,
3702 ptr_type_node
, NULL_TREE
);
3704 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3706 /* C++ extensions */
3708 unknown_type_node
= make_node (LANG_TYPE
);
3709 record_unknown_type (unknown_type_node
, "unknown type");
3711 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3712 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3714 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3716 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3717 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3719 init_list_type_node
= make_node (LANG_TYPE
);
3720 record_unknown_type (init_list_type_node
, "init list");
3723 /* Make sure we get a unique function type, so we can give
3724 its pointer type a name. (This wins for gdb.) */
3725 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3726 TREE_TYPE (vfunc_type
) = integer_type_node
;
3727 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3728 layout_type (vfunc_type
);
3730 vtable_entry_type
= build_pointer_type (vfunc_type
);
3732 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3735 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3736 layout_type (vtbl_type_node
);
3737 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3738 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3739 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3740 layout_type (vtbl_ptr_type_node
);
3741 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3743 push_namespace (get_identifier ("__cxxabiv1"));
3744 abi_node
= current_namespace
;
3747 global_type_node
= make_node (LANG_TYPE
);
3748 record_unknown_type (global_type_node
, "global type");
3751 current_lang_name
= lang_name_cplusplus
;
3754 tree newattrs
, extvisattr
;
3755 tree newtype
, deltype
;
3756 tree ptr_ftype_sizetype
;
3760 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3761 if (cxx_dialect
== cxx98
)
3764 tree bad_alloc_type_node
;
3765 tree bad_alloc_decl
;
3767 push_namespace (std_identifier
);
3768 bad_alloc_id
= get_identifier ("bad_alloc");
3769 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3770 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3772 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3773 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3777 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3780 new_eh_spec
= noexcept_false_spec
;
3782 /* Ensure attribs.c is initialized. */
3784 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3786 newattrs
= tree_cons (get_identifier ("alloc_size"),
3787 build_tree_list (NULL_TREE
, integer_one_node
),
3789 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3790 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3791 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3792 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3793 push_cp_library_fn (NEW_EXPR
, newtype
);
3794 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3795 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3796 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3798 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3799 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3800 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3801 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3802 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3803 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3804 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3805 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3809 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3811 /* Perform other language dependent initializations. */
3812 init_class_processing ();
3813 init_rtti_processing ();
3814 init_template_processing ();
3816 if (flag_exceptions
)
3817 init_exception_processing ();
3819 if (! supports_one_only ())
3822 make_fname_decl
= cp_make_fname_decl
;
3823 start_fname_decls ();
3825 /* Show we use EH for cleanups. */
3826 if (flag_exceptions
)
3827 using_eh_for_cleanups ();
3830 /* Generate an initializer for a function naming variable from
3831 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3832 filled in with the type of the init. */
3835 cp_fname_init (const char* name
, tree
*type_p
)
3837 tree domain
= NULL_TREE
;
3839 tree init
= NULL_TREE
;
3844 length
= strlen (name
);
3845 domain
= build_index_type (size_int (length
));
3846 init
= build_string (length
+ 1, name
);
3849 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3850 type
= build_cplus_array_type (type
, domain
);
3855 TREE_TYPE (init
) = type
;
3857 init
= error_mark_node
;
3862 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3863 the decl, LOC is the location to give the decl, NAME is the
3864 initialization string and TYPE_DEP indicates whether NAME depended
3865 on the type of the function. We make use of that to detect
3866 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3867 at the point of first use, so we mustn't push the decl now. */
3870 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3872 const char *const name
= (type_dep
&& processing_template_decl
3873 ? NULL
: fname_as_string (type_dep
));
3875 tree init
= cp_fname_init (name
, &type
);
3876 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3879 free (CONST_CAST (char *, name
));
3881 /* As we're using pushdecl_with_scope, we must set the context. */
3882 DECL_CONTEXT (decl
) = current_function_decl
;
3884 TREE_STATIC (decl
) = 1;
3885 TREE_READONLY (decl
) = 1;
3886 DECL_ARTIFICIAL (decl
) = 1;
3888 TREE_USED (decl
) = 1;
3890 if (current_function_decl
)
3892 cp_binding_level
*b
= current_binding_level
;
3893 if (b
->kind
== sk_function_parms
)
3894 return error_mark_node
;
3895 while (b
->level_chain
->kind
!= sk_function_parms
)
3897 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3898 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3899 LOOKUP_ONLYCONVERTING
);
3903 DECL_THIS_STATIC (decl
) = true;
3904 pushdecl_top_level_and_finish (decl
, init
);
3911 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3913 tree id
= DECL_NAME (decl
);
3914 const char *name
= IDENTIFIER_POINTER (id
);
3916 retrofit_lang_decl (decl
);
3918 DECL_ARTIFICIAL (decl
) = 1;
3919 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3920 SET_DECL_LANGUAGE (decl
, lang_c
);
3921 /* Runtime library routines are, by definition, available in an
3922 external shared object. */
3923 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3924 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3926 DECL_CONTEXT (decl
) = context
;
3929 pushdecl_top_level (decl
);
3933 /* A function in the user's namespace should have an explicit
3934 declaration before it is used. Mark the built-in function as
3935 anticipated but not actually declared. */
3936 if (name
[0] != '_' || name
[1] != '_')
3937 DECL_ANTICIPATED (decl
) = 1;
3938 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3940 size_t len
= strlen (name
);
3942 /* Treat __*_chk fortification functions as anticipated as well,
3943 unless they are __builtin_*. */
3944 if (len
> strlen ("___chk")
3945 && memcmp (name
+ len
- strlen ("_chk"),
3946 "_chk", strlen ("_chk") + 1) == 0)
3947 DECL_ANTICIPATED (decl
) = 1;
3954 cxx_builtin_function (tree decl
)
3956 tree id
= DECL_NAME (decl
);
3957 const char *name
= IDENTIFIER_POINTER (id
);
3958 /* All builtins that don't begin with an '_' should additionally
3959 go in the 'std' namespace. */
3962 tree decl2
= copy_node(decl
);
3963 push_namespace (std_identifier
);
3964 builtin_function_1 (decl2
, std_node
, false);
3968 return builtin_function_1 (decl
, NULL_TREE
, false);
3971 /* Like cxx_builtin_function, but guarantee the function is added to the global
3972 scope. This is to allow function specific options to add new machine
3973 dependent builtins when the target ISA changes via attribute((target(...)))
3974 which saves space on program startup if the program does not use non-generic
3978 cxx_builtin_function_ext_scope (tree decl
)
3981 tree id
= DECL_NAME (decl
);
3982 const char *name
= IDENTIFIER_POINTER (id
);
3983 /* All builtins that don't begin with an '_' should additionally
3984 go in the 'std' namespace. */
3987 tree decl2
= copy_node(decl
);
3988 push_namespace (std_identifier
);
3989 builtin_function_1 (decl2
, std_node
, true);
3993 return builtin_function_1 (decl
, NULL_TREE
, true);
3996 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3997 function. Not called directly. */
4000 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
4002 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4003 DECL_EXTERNAL (fn
) = 1;
4004 TREE_PUBLIC (fn
) = 1;
4005 DECL_ARTIFICIAL (fn
) = 1;
4006 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4007 SET_DECL_LANGUAGE (fn
, lang_c
);
4008 /* Runtime library routines are, by definition, available in an
4009 external shared object. */
4010 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4011 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4015 /* Returns the _DECL for a library function with C linkage.
4016 We assume that such functions never throw; if this is incorrect,
4017 callers should unset TREE_NOTHROW. */
4020 build_library_fn (tree name
, tree type
)
4022 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
4023 TREE_NOTHROW (fn
) = 1;
4027 /* Returns the _DECL for a library function with C++ linkage. */
4030 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
4032 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
4033 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
4034 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4035 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4039 /* Like build_library_fn, but takes a C string instead of an
4043 build_library_fn_ptr (const char* name
, tree type
)
4045 return build_library_fn (get_identifier (name
), type
);
4048 /* Like build_cp_library_fn, but takes a C string instead of an
4052 build_cp_library_fn_ptr (const char* name
, tree type
)
4054 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
4057 /* Like build_library_fn, but also pushes the function so that we will
4058 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4059 may throw exceptions listed in RAISES. */
4062 push_library_fn (tree name
, tree type
, tree raises
)
4067 type
= build_exception_variant (type
, raises
);
4069 fn
= build_library_fn (name
, type
);
4070 pushdecl_top_level (fn
);
4074 /* Like build_cp_library_fn, but also pushes the function so that it
4075 will be found by normal lookup. */
4078 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4080 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4085 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4089 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4093 push_void_library_fn (tree name
, tree parmtypes
)
4095 tree type
= build_function_type (void_type_node
, parmtypes
);
4096 return push_library_fn (name
, type
, NULL_TREE
);
4099 /* Like push_library_fn, but also note that this function throws
4100 and does not return. Used for __throw_foo and the like. */
4103 push_throw_library_fn (tree name
, tree type
)
4105 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4106 TREE_THIS_VOLATILE (fn
) = 1;
4107 TREE_NOTHROW (fn
) = 0;
4111 /* When we call finish_struct for an anonymous union, we create
4112 default copy constructors and such. But, an anonymous union
4113 shouldn't have such things; this function undoes the damage to the
4114 anonymous union type T.
4116 (The reason that we create the synthesized methods is that we don't
4117 distinguish `union { int i; }' from `typedef union { int i; } U'.
4118 The first is an anonymous union; the second is just an ordinary
4122 fixup_anonymous_aggr (tree t
)
4126 /* Wipe out memory of synthesized methods. */
4127 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4128 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4129 TYPE_HAS_COPY_CTOR (t
) = 0;
4130 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4131 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4132 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4134 /* Splice the implicitly generated functions out of the TYPE_METHODS
4136 q
= &TYPE_METHODS (t
);
4139 if (DECL_ARTIFICIAL (*q
))
4140 *q
= TREE_CHAIN (*q
);
4142 q
= &DECL_CHAIN (*q
);
4145 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4146 if (TYPE_METHODS (t
))
4148 tree decl
= TYPE_MAIN_DECL (t
);
4150 if (TREE_CODE (t
) != UNION_TYPE
)
4151 error_at (DECL_SOURCE_LOCATION (decl
),
4152 "an anonymous struct cannot have function members");
4154 error_at (DECL_SOURCE_LOCATION (decl
),
4155 "an anonymous union cannot have function members");
4158 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4159 assignment operators (because they cannot have these methods themselves).
4160 For anonymous unions this is already checked because they are not allowed
4161 in any union, otherwise we have to check it. */
4162 if (TREE_CODE (t
) != UNION_TYPE
)
4166 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4167 if (TREE_CODE (field
) == FIELD_DECL
)
4169 type
= TREE_TYPE (field
);
4170 if (CLASS_TYPE_P (type
))
4172 if (TYPE_NEEDS_CONSTRUCTING (type
))
4173 error ("member %q+#D with constructor not allowed "
4174 "in anonymous aggregate", field
);
4175 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4176 error ("member %q+#D with destructor not allowed "
4177 "in anonymous aggregate", field
);
4178 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4179 error ("member %q+#D with copy assignment operator "
4180 "not allowed in anonymous aggregate", field
);
4186 /* Warn for an attribute located at LOCATION that appertains to the
4187 class type CLASS_TYPE that has not been properly placed after its
4188 class-key, in it class-specifier. */
4191 warn_misplaced_attr_for_class_type (source_location location
,
4194 gcc_assert (TAGGED_TYPE_P (class_type
));
4196 warning_at (location
, OPT_Wattributes
,
4197 "attribute ignored in declaration "
4198 "of %q#T", class_type
);
4200 "attribute for %q#T must follow the %qs keyword",
4201 class_type
, class_key_or_enum_as_string (class_type
));
4204 /* Make sure that a declaration with no declarator is well-formed, i.e.
4205 just declares a tagged type or anonymous union.
4207 Returns the type declared; or NULL_TREE if none. */
4210 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4211 bool explicit_type_instantiation_p
)
4213 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4214 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4215 /* If a class, struct, or enum type is declared by the DECLSPECS
4216 (i.e, if a class-specifier, enum-specifier, or non-typename
4217 elaborated-type-specifier appears in the DECLSPECS),
4218 DECLARED_TYPE is set to the corresponding type. */
4219 tree declared_type
= NULL_TREE
;
4220 bool error_p
= false;
4222 if (declspecs
->multiple_types_p
)
4223 error ("multiple types in one declaration");
4224 else if (declspecs
->redefined_builtin_type
)
4226 if (!in_system_header
)
4227 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4228 "redeclaration of C++ built-in type %qT",
4229 declspecs
->redefined_builtin_type
);
4234 && TYPE_P (declspecs
->type
)
4235 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4236 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4237 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4238 declared_type
= declspecs
->type
;
4239 else if (declspecs
->type
== error_mark_node
)
4241 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4242 permerror (input_location
, "declaration does not declare anything");
4243 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4245 error ("%<auto%> can only be specified for variables "
4246 "or function declarations");
4247 return error_mark_node
;
4249 /* Check for an anonymous union. */
4250 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4251 && TYPE_ANONYMOUS_P (declared_type
))
4253 /* 7/3 In a simple-declaration, the optional init-declarator-list
4254 can be omitted only when declaring a class (clause 9) or
4255 enumeration (7.2), that is, when the decl-specifier-seq contains
4256 either a class-specifier, an elaborated-type-specifier with
4257 a class-key (9.1), or an enum-specifier. In these cases and
4258 whenever a class-specifier or enum-specifier is present in the
4259 decl-specifier-seq, the identifiers in these specifiers are among
4260 the names being declared by the declaration (as class-name,
4261 enum-names, or enumerators, depending on the syntax). In such
4262 cases, and except for the declaration of an unnamed bit-field (9.6),
4263 the decl-specifier-seq shall introduce one or more names into the
4264 program, or shall redeclare a name introduced by a previous
4265 declaration. [Example:
4266 enum { }; // ill-formed
4267 typedef class { }; // ill-formed
4271 error ("missing type-name in typedef-declaration");
4274 /* Anonymous unions are objects, so they can have specifiers. */;
4275 SET_ANON_AGGR_TYPE_P (declared_type
);
4277 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4278 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4283 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4284 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4285 error ("%qs can only be specified for functions",
4286 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4287 ? "inline" : "virtual");
4289 && (!current_class_type
4290 || current_scope () != current_class_type
))
4291 error ("%<friend%> can only be specified inside a class");
4292 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4293 error ("%<explicit%> can only be specified for constructors");
4294 else if (declspecs
->storage_class
)
4295 error ("a storage class can only be specified for objects "
4297 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4298 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4299 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4300 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4301 error ("qualifiers can only be specified for objects "
4303 else if (saw_typedef
)
4304 warning (0, "%<typedef%> was ignored in this declaration");
4305 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4306 error ("%<constexpr%> cannot be used for type declarations");
4309 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4312 if (!CLASS_TYPE_P (declared_type
)
4313 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4314 /* For a non-template class, use the name location. */
4315 loc
= location_of (declared_type
);
4317 /* For a template class (an explicit instantiation), use the
4318 current location. */
4319 loc
= input_location
;
4321 if (explicit_type_instantiation_p
)
4322 /* [dcl.attr.grammar]/4:
4324 No attribute-specifier-seq shall appertain to an explicit
4327 warning_at (loc
, OPT_Wattributes
,
4328 "attribute ignored in explicit instantiation %q#T",
4331 "no attribute can be applied to "
4332 "an explicit instantiation");
4335 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4338 return declared_type
;
4341 /* Called when a declaration is seen that contains no names to declare.
4342 If its type is a reference to a structure, union or enum inherited
4343 from a containing scope, shadow that tag name for the current scope
4344 with a forward reference.
4345 If its type defines a new named structure or union
4346 or defines an enum, it is valid but we need not do anything here.
4347 Otherwise, it is an error.
4349 C++: may have to grok the declspecs to learn about static,
4350 complain for anonymous unions.
4352 Returns the TYPE declared -- or NULL_TREE if none. */
4355 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4357 tree t
= check_tag_decl (declspecs
,
4358 /*explicit_type_instantiation_p=*/false);
4363 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4366 /* This is where the variables in an anonymous union are
4367 declared. An anonymous union declaration looks like:
4369 because there is no declarator after the union, the parser
4370 sends that declaration here. */
4371 if (ANON_AGGR_TYPE_P (t
))
4373 fixup_anonymous_aggr (t
);
4375 if (TYPE_FIELDS (t
))
4377 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4378 declspecs
, NORMAL
, 0, NULL
);
4379 finish_anon_union (decl
);
4386 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4389 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4390 const cp_declarator
*declarator
,
4391 bool is_template_arg
)
4395 enum decl_context context
4396 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4397 attrs
= type_specifiers
->attributes
;
4398 type_specifiers
->attributes
= NULL_TREE
;
4399 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4400 if (attrs
&& type
!= error_mark_node
)
4402 if (CLASS_TYPE_P (type
))
4403 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4404 "outside of definition", type
);
4405 else if (MAYBE_CLASS_TYPE_P (type
))
4406 /* A template type parameter or other dependent type. */
4407 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4408 "type %qT without an associated declaration", type
);
4410 cplus_decl_attributes (&type
, attrs
, 0);
4415 /* Process a DECLARATOR for a function-scope variable declaration,
4416 namespace-scope variable declaration, or function declaration.
4417 (Function definitions go through start_function; class member
4418 declarations appearing in the body of the class go through
4419 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4420 If an error occurs, the error_mark_node is returned instead.
4422 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4423 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4424 for an explicitly defaulted function, or SD_DELETED for an explicitly
4425 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4426 implicitly initialized via a default constructor. ATTRIBUTES and
4427 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4429 The scope represented by the context of the returned DECL is pushed
4430 (if it is not the global namespace) and is assigned to
4431 *PUSHED_SCOPE_P. The caller is then responsible for calling
4432 pop_scope on *PUSHED_SCOPE_P if it is set. */
4435 start_decl (const cp_declarator
*declarator
,
4436 cp_decl_specifier_seq
*declspecs
,
4439 tree prefix_attributes
,
4440 tree
*pushed_scope_p
)
4448 *pushed_scope_p
= NULL_TREE
;
4450 /* An object declared as __attribute__((deprecated)) suppresses
4451 warnings of uses of other deprecated items. */
4452 if (lookup_attribute ("deprecated", attributes
))
4453 deprecated_state
= DEPRECATED_SUPPRESS
;
4455 attributes
= chainon (attributes
, prefix_attributes
);
4457 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4460 deprecated_state
= DEPRECATED_NORMAL
;
4462 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4463 || decl
== error_mark_node
)
4464 return error_mark_node
;
4466 context
= CP_DECL_CONTEXT (decl
);
4467 if (context
!= global_namespace
)
4468 *pushed_scope_p
= push_scope (context
);
4471 /* Is it valid for this decl to have an initializer at all?
4472 If not, set INITIALIZED to zero, which will indirectly
4473 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4474 switch (TREE_CODE (decl
))
4477 error ("typedef %qD is initialized (use decltype instead)", decl
);
4478 return error_mark_node
;
4481 if (initialized
== SD_DELETED
)
4482 /* We'll handle the rest of the semantics later, but we need to
4483 set this now so it's visible to duplicate_decls. */
4484 DECL_DELETED_FN (decl
) = 1;
4493 if (! toplevel_bindings_p ()
4494 && DECL_EXTERNAL (decl
))
4495 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4497 DECL_EXTERNAL (decl
) = 0;
4498 if (toplevel_bindings_p ())
4499 TREE_STATIC (decl
) = 1;
4501 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4503 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4504 record_key_method_defined (decl
);
4506 /* If this is a typedef that names the class for linkage purposes
4507 (7.1.3p8), apply any attributes directly to the type. */
4508 if (TREE_CODE (decl
) == TYPE_DECL
4509 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4510 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4511 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4515 /* Set attributes here so if duplicate decl, will have proper attributes. */
4516 cplus_decl_attributes (&decl
, attributes
, flags
);
4518 /* Dllimported symbols cannot be defined. Static data members (which
4519 can be initialized in-class and dllimported) go through grokfield,
4520 not here, so we don't need to exclude those decls when checking for
4522 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4524 error ("definition of %q#D is marked %<dllimport%>", decl
);
4525 DECL_DLLIMPORT_P (decl
) = 0;
4528 /* If #pragma weak was used, mark the decl weak now. */
4529 if (!processing_template_decl
)
4530 maybe_apply_pragma_weak (decl
);
4532 if (TREE_CODE (decl
) == FUNCTION_DECL
4533 && DECL_DECLARED_INLINE_P (decl
)
4534 && DECL_UNINLINABLE (decl
)
4535 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4536 warning (0, "inline function %q+D given attribute noinline", decl
);
4538 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4540 if (TREE_CODE (decl
) == VAR_DECL
)
4542 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4543 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4544 error ("%q#D is not a static member of %q#T", decl
, context
);
4547 if (DECL_CONTEXT (field
) != context
)
4549 if (!same_type_p (DECL_CONTEXT (field
), context
))
4550 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4551 "to be defined as %<%T::%D%>",
4552 DECL_CONTEXT (field
), DECL_NAME (decl
),
4553 context
, DECL_NAME (decl
));
4554 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4556 /* Static data member are tricky; an in-class initialization
4557 still doesn't provide a definition, so the in-class
4558 declaration will have DECL_EXTERNAL set, but will have an
4559 initialization. Thus, duplicate_decls won't warn
4560 about this situation, and so we check here. */
4561 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4562 error ("duplicate initialization of %qD", decl
);
4563 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4565 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4566 && !DECL_DECLARED_CONSTEXPR_P (field
))
4567 error ("%qD declared %<constexpr%> outside its class", field
);
4572 tree field
= check_classfn (context
, decl
,
4573 (processing_template_decl
4574 > template_class_depth (context
))
4575 ? current_template_parms
4577 if (field
&& field
!= error_mark_node
4578 && duplicate_decls (decl
, field
,
4579 /*newdecl_is_friend=*/false))
4583 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4584 DECL_IN_AGGR_P (decl
) = 0;
4585 /* Do not mark DECL as an explicit specialization if it was not
4586 already marked as an instantiation; a declaration should
4587 never be marked as a specialization unless we know what
4588 template is being specialized. */
4589 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4591 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4593 /* [temp.expl.spec] An explicit specialization of a static data
4594 member of a template is a definition if the declaration
4595 includes an initializer; otherwise, it is a declaration.
4597 We check for processing_specialization so this only applies
4598 to the new specialization syntax. */
4599 if (!initialized
&& processing_specialization
)
4600 DECL_EXTERNAL (decl
) = 1;
4603 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4604 /* Aliases are definitions. */
4606 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4610 was_public
= TREE_PUBLIC (decl
);
4612 /* Enter this declaration into the symbol table. */
4613 decl
= maybe_push_decl (decl
);
4615 if (processing_template_decl
)
4616 decl
= push_template_decl (decl
);
4617 if (decl
== error_mark_node
)
4618 return error_mark_node
;
4620 if (TREE_CODE (decl
) == VAR_DECL
4621 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4622 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4624 /* This is a const variable with implicit 'static'. Set
4625 DECL_THIS_STATIC so we can tell it from variables that are
4626 !TREE_PUBLIC because of the anonymous namespace. */
4627 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4628 DECL_THIS_STATIC (decl
) = 1;
4631 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4632 start_decl_1 (decl
, initialized
);
4637 /* Process the declaration of a variable DECL. INITIALIZED is true
4638 iff DECL is explicitly initialized. (INITIALIZED is false if the
4639 variable is initialized via an implicitly-called constructor.)
4640 This function must be called for ordinary variables (including, for
4641 example, implicit instantiations of templates), but must not be
4642 called for template declarations. */
4645 start_decl_1 (tree decl
, bool initialized
)
4649 bool aggregate_definition_p
;
4651 gcc_assert (!processing_template_decl
);
4653 if (error_operand_p (decl
))
4656 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4658 type
= TREE_TYPE (decl
);
4659 complete_p
= COMPLETE_TYPE_P (type
);
4660 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4662 /* If an explicit initializer is present, or if this is a definition
4663 of an aggregate, then we need a complete type at this point.
4664 (Scalars are always complete types, so there is nothing to
4665 check.) This code just sets COMPLETE_P; errors (if necessary)
4666 are issued below. */
4667 if ((initialized
|| aggregate_definition_p
)
4669 && COMPLETE_TYPE_P (complete_type (type
)))
4672 /* We will not yet have set TREE_READONLY on DECL if the type
4673 was "const", but incomplete, before this point. But, now, we
4674 have a complete type, so we can try again. */
4675 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4679 /* Is it valid for this decl to have an initializer at all? */
4681 /* Don't allow initializations for incomplete types except for
4682 arrays which might be completed by the initialization. */
4684 ; /* A complete type is ok. */
4685 else if (type_uses_auto (type
))
4686 ; /* An auto type is ok. */
4687 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4689 error ("variable %q#D has initializer but incomplete type", decl
);
4690 type
= TREE_TYPE (decl
) = error_mark_node
;
4692 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4694 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4695 error ("elements of array %q#D have incomplete type", decl
);
4696 /* else we already gave an error in start_decl. */
4699 else if (aggregate_definition_p
&& !complete_p
)
4701 if (type_uses_auto (type
))
4702 error ("declaration of %q#D has no initializer", decl
);
4704 error ("aggregate %q#D has incomplete type and cannot be defined",
4706 /* Change the type so that assemble_variable will give
4707 DECL an rtl we can live with: (mem (const_int 0)). */
4708 type
= TREE_TYPE (decl
) = error_mark_node
;
4711 /* Create a new scope to hold this declaration if necessary.
4712 Whether or not a new scope is necessary cannot be determined
4713 until after the type has been completed; if the type is a
4714 specialization of a class template it is not until after
4715 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4716 will be set correctly. */
4717 maybe_push_cleanup_level (type
);
4720 /* Handle initialization of references. DECL, TYPE, and INIT have the
4721 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4722 but will be set to a new CLEANUP_STMT if a temporary is created
4723 that must be destroyed subsequently.
4725 Returns an initializer expression to use to initialize DECL, or
4726 NULL if the initialization can be performed statically.
4728 Quotes on semantics can be found in ARM 8.4.3. */
4731 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4733 if (init
== NULL_TREE
)
4735 if ((DECL_LANG_SPECIFIC (decl
) == 0
4736 || DECL_IN_AGGR_P (decl
) == 0)
4737 && ! DECL_THIS_EXTERN (decl
))
4738 error ("%qD declared as reference but not initialized", decl
);
4742 if (TREE_CODE (init
) == TREE_LIST
)
4743 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4744 tf_warning_or_error
);
4746 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4747 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4748 /* Note: default conversion is only called in very special cases. */
4749 init
= decay_conversion (init
, tf_warning_or_error
);
4751 /* Convert INIT to the reference type TYPE. This may involve the
4752 creation of a temporary, whose lifetime must be the same as that
4753 of the reference. If so, a DECL_EXPR for the temporary will be
4754 added just after the DECL_EXPR for DECL. That's why we don't set
4755 DECL_INITIAL for local references (instead assigning to them
4756 explicitly); we need to allow the temporary to be initialized
4758 return initialize_reference (type
, init
, flags
,
4759 tf_warning_or_error
);
4762 /* Designated initializers in arrays are not supported in GNU C++.
4763 The parser cannot detect this error since it does not know whether
4764 a given brace-enclosed initializer is for a class type or for an
4765 array. This function checks that CE does not use a designated
4766 initializer. If it does, an error is issued. Returns true if CE
4767 is valid, i.e., does not have a designated initializer. */
4770 check_array_designated_initializer (const constructor_elt
*ce
,
4771 unsigned HOST_WIDE_INT index
)
4773 /* Designated initializers for array elements are not supported. */
4776 /* The parser only allows identifiers as designated
4778 if (ce
->index
== error_mark_node
)
4779 error ("name used in a GNU-style designated "
4780 "initializer for an array");
4781 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4783 /* A C99 designator is OK if it matches the current index. */
4784 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4787 sorry ("non-trivial designated initializers not supported");
4791 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4792 error ("name %qD used in a GNU-style designated "
4793 "initializer for an array", ce
->index
);
4801 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4802 array until we finish parsing the initializer. If that's the
4803 situation we're in, update DECL accordingly. */
4806 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4808 tree type
= TREE_TYPE (decl
);
4810 if (TREE_CODE (type
) == ARRAY_TYPE
4811 && TYPE_DOMAIN (type
) == NULL_TREE
4812 && TREE_CODE (decl
) != TYPE_DECL
)
4814 /* do_default is really a C-ism to deal with tentative definitions.
4815 But let's leave it here to ease the eventual merge. */
4816 int do_default
= !DECL_EXTERNAL (decl
);
4817 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4820 /* Check that there are no designated initializers in INIT, as
4821 those are not supported in GNU C++, and as the middle-end
4822 will crash if presented with a non-numeric designated
4824 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4826 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4827 constructor_elt
*ce
;
4829 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4830 if (!check_array_designated_initializer (ce
, i
))
4836 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4840 error ("initializer fails to determine size of %qD", decl
);
4841 TREE_TYPE (decl
) = error_mark_node
;
4843 else if (failure
== 2)
4847 error ("array size missing in %qD", decl
);
4848 TREE_TYPE (decl
) = error_mark_node
;
4850 /* If a `static' var's size isn't known, make it extern as
4851 well as static, so it does not get allocated. If it's not
4852 `static', then don't mark it extern; finish_incomplete_decl
4853 will give it a default size and it will get allocated. */
4854 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4855 DECL_EXTERNAL (decl
) = 1;
4857 else if (failure
== 3)
4859 error ("zero-size array %qD", decl
);
4860 TREE_TYPE (decl
) = error_mark_node
;
4864 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4866 relayout_decl (decl
);
4870 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4871 any appropriate error messages regarding the layout. */
4874 layout_var_decl (tree decl
)
4878 type
= TREE_TYPE (decl
);
4879 if (type
== error_mark_node
)
4882 /* If we haven't already layed out this declaration, do so now.
4883 Note that we must not call complete type for an external object
4884 because it's type might involve templates that we are not
4885 supposed to instantiate yet. (And it's perfectly valid to say
4886 `extern X x' for some incomplete type `X'.) */
4887 if (!DECL_EXTERNAL (decl
))
4888 complete_type (type
);
4889 if (!DECL_SIZE (decl
)
4890 && TREE_TYPE (decl
) != error_mark_node
4891 && (COMPLETE_TYPE_P (type
)
4892 || (TREE_CODE (type
) == ARRAY_TYPE
4893 && !TYPE_DOMAIN (type
)
4894 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4895 layout_decl (decl
, 0);
4897 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4899 /* An automatic variable with an incomplete type: that is an error.
4900 Don't talk about array types here, since we took care of that
4901 message in grokdeclarator. */
4902 error ("storage size of %qD isn%'t known", decl
);
4903 TREE_TYPE (decl
) = error_mark_node
;
4906 /* Keep this code around in case we later want to control debug info
4907 based on whether a type is "used". (jason 1999-11-11) */
4909 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4910 /* Let debugger know it should output info for this type. */
4911 note_debug_info_needed (ttype
);
4913 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4914 note_debug_info_needed (DECL_CONTEXT (decl
));
4917 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4918 && DECL_SIZE (decl
) != NULL_TREE
4919 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4921 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4922 constant_expression_warning (DECL_SIZE (decl
));
4925 error ("storage size of %qD isn%'t constant", decl
);
4926 TREE_TYPE (decl
) = error_mark_node
;
4931 /* If a local static variable is declared in an inline function, or if
4932 we have a weak definition, we must endeavor to create only one
4933 instance of the variable at link-time. */
4936 maybe_commonize_var (tree decl
)
4938 /* Static data in a function with comdat linkage also has comdat
4940 if (TREE_STATIC (decl
)
4941 /* Don't mess with __FUNCTION__. */
4942 && ! DECL_ARTIFICIAL (decl
)
4943 && DECL_FUNCTION_SCOPE_P (decl
)
4944 && vague_linkage_p (DECL_CONTEXT (decl
)))
4948 /* With weak symbols, we simply make the variable COMDAT;
4949 that will cause copies in multiple translations units to
4951 comdat_linkage (decl
);
4955 if (DECL_INITIAL (decl
) == NULL_TREE
4956 || DECL_INITIAL (decl
) == error_mark_node
)
4958 /* Without weak symbols, we can use COMMON to merge
4959 uninitialized variables. */
4960 TREE_PUBLIC (decl
) = 1;
4961 DECL_COMMON (decl
) = 1;
4965 /* While for initialized variables, we must use internal
4966 linkage -- which means that multiple copies will not
4968 TREE_PUBLIC (decl
) = 0;
4969 DECL_COMMON (decl
) = 0;
4970 warning_at (input_location
, 0,
4971 "sorry: semantics of inline function static "
4972 "data %q+#D are wrong (you%'ll wind up "
4973 "with multiple copies)", decl
);
4974 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4975 " you can work around this by removing "
4980 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4981 /* Set it up again; we might have set DECL_INITIAL since the last
4983 comdat_linkage (decl
);
4986 /* Issue an error message if DECL is an uninitialized const variable. */
4989 check_for_uninitialized_const_var (tree decl
)
4991 tree type
= strip_array_types (TREE_TYPE (decl
));
4993 /* ``Unless explicitly declared extern, a const object does not have
4994 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4996 if (TREE_CODE (decl
) == VAR_DECL
4997 && TREE_CODE (type
) != REFERENCE_TYPE
4998 && CP_TYPE_CONST_P (type
)
4999 && !DECL_INITIAL (decl
))
5001 tree field
= default_init_uninitialized_part (type
);
5005 permerror (DECL_SOURCE_LOCATION (decl
),
5006 "uninitialized const %qD", decl
);
5008 if (CLASS_TYPE_P (type
))
5010 tree defaulted_ctor
;
5012 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5013 "%q#T has no user-provided default constructor", type
);
5014 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5016 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5017 "constructor is not user-provided because it is "
5018 "explicitly defaulted in the class body");
5019 inform (0, "and the implicitly-defined constructor does not "
5020 "initialize %q+#D", field
);
5025 /* Structure holding the current initializer being processed by reshape_init.
5026 CUR is a pointer to the current element being processed, END is a pointer
5027 after the last element present in the initializer. */
5028 typedef struct reshape_iterator_t
5030 constructor_elt
*cur
;
5031 constructor_elt
*end
;
5034 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5036 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5037 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5038 initialized. If there are no more such fields, the return value
5042 next_initializable_field (tree field
)
5045 && (TREE_CODE (field
) != FIELD_DECL
5046 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5047 || DECL_ARTIFICIAL (field
)))
5048 field
= DECL_CHAIN (field
);
5053 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5054 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5055 INTEGER_CST representing the size of the array minus one (the maximum index),
5056 or NULL_TREE if the array was declared without specifying the size. D is
5057 the iterator within the constructor. */
5060 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5061 tsubst_flags_t complain
)
5064 bool sized_array_p
= (max_index
!= NULL_TREE
);
5065 unsigned HOST_WIDE_INT max_index_cst
= 0;
5066 unsigned HOST_WIDE_INT index
;
5068 /* The initializer for an array is always a CONSTRUCTOR. */
5069 new_init
= build_constructor (init_list_type_node
, NULL
);
5073 /* Minus 1 is used for zero sized arrays. */
5074 if (integer_all_onesp (max_index
))
5077 if (host_integerp (max_index
, 1))
5078 max_index_cst
= tree_low_cst (max_index
, 1);
5079 /* sizetype is sign extended, not zero extended. */
5081 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5085 /* Loop until there are no more initializers. */
5087 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5091 constructor_elt
*old_cur
= d
->cur
;
5093 check_array_designated_initializer (d
->cur
, index
);
5094 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5096 if (elt_init
== error_mark_node
)
5097 return error_mark_node
;
5098 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5099 size_int (index
), elt_init
);
5100 if (!TREE_CONSTANT (elt_init
))
5101 TREE_CONSTANT (new_init
) = false;
5103 /* This can happen with an invalid initializer (c++/54501). */
5104 if (d
->cur
== old_cur
&& !sized_array_p
)
5111 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5112 Parameters are the same of reshape_init_r. */
5115 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5117 tree max_index
= NULL_TREE
;
5119 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5121 if (TYPE_DOMAIN (type
))
5122 max_index
= array_type_nelts (type
);
5124 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5127 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5128 Parameters are the same of reshape_init_r. */
5131 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5133 tree max_index
= NULL_TREE
;
5135 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5137 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5139 tree value
= d
->cur
->value
;
5140 if (!same_type_p (TREE_TYPE (value
), type
))
5142 if (complain
& tf_error
)
5143 error ("invalid type %qT as initializer for a vector of type %qT",
5144 TREE_TYPE (d
->cur
->value
), type
);
5145 value
= error_mark_node
;
5151 /* For a vector, we initialize it as an array of the appropriate size. */
5152 if (TREE_CODE (type
) == VECTOR_TYPE
)
5153 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5155 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5158 /* Subroutine of reshape_init_r, processes the initializers for classes
5159 or union. Parameters are the same of reshape_init_r. */
5162 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5163 tsubst_flags_t complain
)
5168 gcc_assert (CLASS_TYPE_P (type
));
5170 /* The initializer for a class is always a CONSTRUCTOR. */
5171 new_init
= build_constructor (init_list_type_node
, NULL
);
5172 field
= next_initializable_field (TYPE_FIELDS (type
));
5178 An initializer for an aggregate member that is an
5179 empty class shall have the form of an empty
5180 initializer-list {}. */
5181 if (!first_initializer_p
)
5183 if (complain
& tf_error
)
5184 error ("initializer for %qT must be brace-enclosed", type
);
5185 return error_mark_node
;
5190 /* Loop through the initializable fields, gathering initializers. */
5191 while (d
->cur
!= d
->end
)
5194 constructor_elt
*old_cur
= d
->cur
;
5196 /* Handle designated initializers, as an extension. */
5199 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5201 if (complain
& tf_error
)
5202 error ("%<[%E] =%> used in a GNU-style designated initializer"
5203 " for class %qT", d
->cur
->index
, type
);
5204 return error_mark_node
;
5207 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5208 /* We already reshaped this. */
5209 gcc_assert (d
->cur
->index
== field
);
5211 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5213 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5215 if (complain
& tf_error
)
5216 error ("%qT has no non-static data member named %qD", type
,
5218 return error_mark_node
;
5222 /* If we processed all the member of the class, we are done. */
5226 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5227 /*first_initializer_p=*/false, complain
);
5228 if (field_init
== error_mark_node
)
5229 return error_mark_node
;
5231 if (d
->cur
== old_cur
&& d
->cur
->index
)
5233 /* This can happen with an invalid initializer for a flexible
5234 array member (c++/54441). */
5235 if (complain
& tf_error
)
5236 error ("invalid initializer for %q#D", field
);
5237 return error_mark_node
;
5240 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5244 When a union is initialized with a brace-enclosed
5245 initializer, the braces shall only contain an
5246 initializer for the first member of the union. */
5247 if (TREE_CODE (type
) == UNION_TYPE
)
5250 field
= next_initializable_field (DECL_CHAIN (field
));
5256 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5257 designators are not valid; either complain or return true to indicate
5258 that reshape_init_r should return error_mark_node. */
5261 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5265 if (complain
& tf_error
)
5266 error ("C99 designator %qE outside aggregate initializer",
5274 /* Subroutine of reshape_init, which processes a single initializer (part of
5275 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5276 iterator within the CONSTRUCTOR which points to the initializer to process.
5277 FIRST_INITIALIZER_P is true if this is the first initializer of the
5278 outermost CONSTRUCTOR node. */
5281 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5282 tsubst_flags_t complain
)
5284 tree init
= d
->cur
->value
;
5286 if (error_operand_p (init
))
5287 return error_mark_node
;
5289 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5290 && has_designator_problem (d
, complain
))
5291 return error_mark_node
;
5293 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5295 /* A complex type can be initialized from one or two initializers,
5296 but braces are not elided. */
5298 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5300 if (CONSTRUCTOR_NELTS (init
) > 2)
5302 if (complain
& tf_error
)
5303 error ("too many initializers for %qT", type
);
5305 return error_mark_node
;
5308 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5310 VEC(constructor_elt
, gc
) *v
= 0;
5311 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5312 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5313 if (has_designator_problem (d
, complain
))
5314 return error_mark_node
;
5316 init
= build_constructor (init_list_type_node
, v
);
5321 /* A non-aggregate type is always initialized with a single
5323 if (!CP_AGGREGATE_TYPE_P (type
))
5325 /* It is invalid to initialize a non-aggregate type with a
5326 brace-enclosed initializer before C++0x.
5327 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5328 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5329 a CONSTRUCTOR (with a record type). */
5330 if (TREE_CODE (init
) == CONSTRUCTOR
5331 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5333 if (SCALAR_TYPE_P (type
))
5335 if (complain
& tf_error
)
5336 error ("braces around scalar initializer for type %qT", type
);
5337 init
= error_mark_node
;
5340 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5349 All implicit type conversions (clause _conv_) are considered when
5350 initializing the aggregate member with an initializer from an
5351 initializer-list. If the initializer can initialize a member,
5352 the member is initialized. Otherwise, if the member is itself a
5353 non-empty subaggregate, brace elision is assumed and the
5354 initializer is considered for the initialization of the first
5355 member of the subaggregate. */
5356 if (TREE_CODE (init
) != CONSTRUCTOR
5357 /* But don't try this for the first initializer, since that would be
5358 looking through the outermost braces; A a2 = { a1 }; is not a
5359 valid aggregate initialization. */
5360 && !first_initializer_p
5361 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5362 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5369 /* [dcl.init.string]
5371 A char array (whether plain char, signed char, or unsigned char)
5372 can be initialized by a string-literal (optionally enclosed in
5373 braces); a wchar_t array can be initialized by a wide
5374 string-literal (optionally enclosed in braces). */
5375 if (TREE_CODE (type
) == ARRAY_TYPE
5376 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5378 tree str_init
= init
;
5380 /* Strip one level of braces if and only if they enclose a single
5381 element (as allowed by [dcl.init.string]). */
5382 if (!first_initializer_p
5383 && TREE_CODE (str_init
) == CONSTRUCTOR
5384 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5386 str_init
= VEC_index (constructor_elt
,
5387 CONSTRUCTOR_ELTS (str_init
), 0).value
;
5390 /* If it's a string literal, then it's the initializer for the array
5391 as a whole. Otherwise, continue with normal initialization for
5392 array types (one value per array element). */
5393 if (TREE_CODE (str_init
) == STRING_CST
)
5395 if (has_designator_problem (d
, complain
))
5396 return error_mark_node
;
5402 /* The following cases are about aggregates. If we are not within a full
5403 initializer already, and there is not a CONSTRUCTOR, it means that there
5404 is a missing set of braces (that is, we are processing the case for
5405 which reshape_init exists). */
5406 if (!first_initializer_p
)
5408 if (TREE_CODE (init
) == CONSTRUCTOR
)
5410 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5411 /* There is no need to reshape pointer-to-member function
5412 initializers, as they are always constructed correctly
5413 by the front end. */
5415 else if (COMPOUND_LITERAL_P (init
))
5416 /* For a nested compound literal, there is no need to reshape since
5417 brace elision is not allowed. Even if we decided to allow it,
5418 we should add a call to reshape_init in finish_compound_literal,
5419 before calling digest_init, so changing this code would still
5420 not be necessary. */
5421 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5425 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5426 return reshape_init (type
, init
, complain
);
5430 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5434 /* Dispatch to specialized routines. */
5435 if (CLASS_TYPE_P (type
))
5436 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5437 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5438 return reshape_init_array (type
, d
, complain
);
5439 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5440 return reshape_init_vector (type
, d
, complain
);
5445 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5446 brace-enclosed aggregate initializer.
5448 INIT is the CONSTRUCTOR containing the list of initializers describing
5449 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5450 It may not presently match the shape of the TYPE; for example:
5452 struct S { int a; int b; };
5453 struct S a[] = { 1, 2, 3, 4 };
5455 Here INIT will hold a VEC of four elements, rather than a
5456 VEC of two elements, each itself a VEC of two elements. This
5457 routine transforms INIT from the former form into the latter. The
5458 revised CONSTRUCTOR node is returned. */
5461 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5463 VEC(constructor_elt
, gc
) *v
;
5467 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5469 v
= CONSTRUCTOR_ELTS (init
);
5471 /* An empty constructor does not need reshaping, and it is always a valid
5473 if (VEC_empty (constructor_elt
, v
))
5476 /* Recurse on this CONSTRUCTOR. */
5477 d
.cur
= &VEC_index (constructor_elt
, v
, 0);
5478 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5480 new_init
= reshape_init_r (type
, &d
, true, complain
);
5481 if (new_init
== error_mark_node
)
5482 return error_mark_node
;
5484 /* Make sure all the element of the constructor were used. Otherwise,
5485 issue an error about exceeding initializers. */
5488 if (complain
& tf_error
)
5489 error ("too many initializers for %qT", type
);
5491 return error_mark_node
;
5497 /* Verify array initializer. Returns true if errors have been reported. */
5500 check_array_initializer (tree decl
, tree type
, tree init
)
5502 tree element_type
= TREE_TYPE (type
);
5504 /* The array type itself need not be complete, because the
5505 initializer may tell us how many elements are in the array.
5506 But, the elements of the array must be complete. */
5507 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5510 error ("elements of array %q#D have incomplete type", decl
);
5512 error ("elements of array %q#T have incomplete type", type
);
5515 /* It is not valid to initialize a VLA. */
5517 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5518 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5521 error ("variable-sized object %qD may not be initialized", decl
);
5523 error ("variable-sized compound literal");
5529 /* Subroutine of check_initializer; args are passed down from that function.
5530 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5533 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5536 gcc_assert (stmts_are_full_exprs_p ());
5537 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5540 /* Verify INIT (the initializer for DECL), and record the
5541 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5542 grok_reference_init.
5544 If the return value is non-NULL, it is an expression that must be
5545 evaluated dynamically to initialize DECL. */
5548 check_initializer (tree decl
, tree init
, int flags
, VEC(tree
,gc
) **cleanups
)
5550 tree type
= TREE_TYPE (decl
);
5551 tree init_code
= NULL
;
5552 tree extra_init
= NULL_TREE
;
5555 /* Things that are going to be initialized need to have complete
5557 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5559 if (DECL_HAS_VALUE_EXPR_P (decl
))
5561 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5562 it doesn't have storage to be initialized. */
5563 gcc_assert (init
== NULL_TREE
);
5567 if (type
== error_mark_node
)
5568 /* We will have already complained. */
5571 if (TREE_CODE (type
) == ARRAY_TYPE
)
5573 if (check_array_initializer (decl
, type
, init
))
5576 else if (!COMPLETE_TYPE_P (type
))
5578 error ("%q#D has incomplete type", decl
);
5579 TREE_TYPE (decl
) = error_mark_node
;
5583 /* There is no way to make a variable-sized class type in GNU C++. */
5584 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5586 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5588 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5589 if (SCALAR_TYPE_P (type
))
5593 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5594 init
= build_zero_init (type
, NULL_TREE
, false);
5596 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5598 error ("scalar object %qD requires one element in initializer",
5600 TREE_TYPE (decl
) = error_mark_node
;
5606 if (TREE_CODE (decl
) == CONST_DECL
)
5608 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5610 DECL_INITIAL (decl
) = init
;
5612 gcc_assert (init
!= NULL_TREE
);
5615 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5617 else if (init
|| type_build_ctor_call (type
)
5618 || TREE_CODE (type
) == REFERENCE_TYPE
)
5620 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5622 init
= grok_reference_init (decl
, type
, init
, flags
);
5623 flags
|= LOOKUP_ALREADY_DIGESTED
;
5626 check_for_uninitialized_const_var (decl
);
5627 /* Do not reshape constructors of vectors (they don't need to be
5629 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5631 if (is_std_init_list (type
))
5633 init
= perform_implicit_conversion (type
, init
,
5634 tf_warning_or_error
);
5635 flags
|= LOOKUP_ALREADY_DIGESTED
;
5637 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5639 /* Don't reshape if the class has constructors. */
5640 if (cxx_dialect
== cxx98
)
5641 error ("in C++98 %qD must be initialized by constructor, "
5645 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5647 error ("opaque vector types cannot be initialized");
5648 init
= error_mark_node
;
5652 init
= reshape_init (type
, init
, tf_warning_or_error
);
5653 if (SCALAR_TYPE_P (type
))
5654 check_narrowing (type
, init
);
5658 /* If DECL has an array type without a specific bound, deduce the
5659 array size from the initializer. */
5660 maybe_deduce_size_from_array_init (decl
, init
);
5661 type
= TREE_TYPE (decl
);
5662 if (type
== error_mark_node
)
5665 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5666 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5667 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5668 && CP_AGGREGATE_TYPE_P (type
)))
5670 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5672 /* A constructor call is a non-trivial initializer even if
5673 it isn't explicitly written. */
5674 if (TREE_SIDE_EFFECTS (init_code
))
5675 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5677 /* If this is a constexpr initializer, expand_default_init will
5678 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5679 case, pull the initializer back out and pass it down into
5680 store_init_value. */
5681 while (TREE_CODE (init_code
) == EXPR_STMT
5682 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5683 init_code
= TREE_OPERAND (init_code
, 0);
5684 if (TREE_CODE (init_code
) == INIT_EXPR
)
5686 init
= TREE_OPERAND (init_code
, 1);
5687 init_code
= NULL_TREE
;
5688 /* Don't call digest_init; it's unnecessary and will complain
5689 about aggregate initialization of non-aggregate classes. */
5690 flags
|= LOOKUP_ALREADY_DIGESTED
;
5692 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5694 /* Declared constexpr, but no suitable initializer; massage
5695 init appropriately so we can pass it into store_init_value
5697 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5698 init
= finish_compound_literal (type
, init
,
5699 tf_warning_or_error
);
5700 else if (CLASS_TYPE_P (type
)
5701 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5703 init
= build_functional_cast (type
, init
, tf_none
);
5704 if (init
!= error_mark_node
)
5705 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5707 init_code
= NULL_TREE
;
5713 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5715 /* In aggregate initialization of a variable, each element
5716 initialization is a full-expression because there is no
5717 enclosing expression. */
5718 gcc_assert (stmts_are_full_exprs_p ());
5720 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5722 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5723 && DECL_INITIAL (decl
)
5724 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5725 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5726 warning (0, "array %qD initialized by parenthesized string literal %qE",
5727 decl
, DECL_INITIAL (decl
));
5733 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5734 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5735 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5736 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5739 check_for_uninitialized_const_var (decl
);
5742 if (init
&& init
!= error_mark_node
)
5743 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5746 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5748 if (init_code
&& DECL_IN_AGGR_P (decl
))
5750 static int explained
= 0;
5752 if (cxx_dialect
< cxx0x
)
5753 error ("initializer invalid for static member with constructor");
5755 error ("non-constant in-class initialization invalid for static "
5756 "member %qD", decl
);
5759 error ("(an out of class initialization is required)");
5767 /* If DECL is not a local variable, give it RTL. */
5770 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5772 int toplev
= toplevel_bindings_p ();
5774 const char *filename
;
5776 /* Set the DECL_ASSEMBLER_NAME for the object. */
5779 /* The `register' keyword, when used together with an
5780 asm-specification, indicates that the variable should be
5781 placed in a particular register. */
5782 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5784 set_user_assembler_name (decl
, asmspec
);
5785 DECL_HARD_REGISTER (decl
) = 1;
5789 if (TREE_CODE (decl
) == FUNCTION_DECL
5790 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5791 set_builtin_user_assembler_name (decl
, asmspec
);
5792 set_user_assembler_name (decl
, asmspec
);
5796 /* Handle non-variables up front. */
5797 if (TREE_CODE (decl
) != VAR_DECL
)
5799 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5803 /* If we see a class member here, it should be a static data
5805 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5807 gcc_assert (TREE_STATIC (decl
));
5808 /* An in-class declaration of a static data member should be
5809 external; it is only a declaration, and not a definition. */
5810 if (init
== NULL_TREE
)
5811 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5814 /* We don't create any RTL for local variables. */
5815 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5818 /* We defer emission of local statics until the corresponding
5819 DECL_EXPR is expanded. */
5820 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5822 /* We try to defer namespace-scope static constants so that they are
5823 not emitted into the object file unnecessarily. */
5824 filename
= input_filename
;
5825 if (!DECL_VIRTUAL_P (decl
)
5826 && TREE_READONLY (decl
)
5827 && DECL_INITIAL (decl
) != NULL_TREE
5828 && DECL_INITIAL (decl
) != error_mark_node
5830 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5832 && !TREE_PUBLIC (decl
))
5834 /* Fool with the linkage of static consts according to #pragma
5836 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5837 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5839 TREE_PUBLIC (decl
) = 1;
5840 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5845 /* Likewise for template instantiations. */
5846 else if (DECL_LANG_SPECIFIC (decl
)
5847 && DECL_IMPLICIT_INSTANTIATION (decl
))
5850 /* If we're not deferring, go ahead and assemble the variable. */
5852 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5855 /* walk_tree helper for wrap_temporary_cleanups, below. */
5858 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5860 /* Stop at types or full-expression boundaries. */
5861 if (TYPE_P (*stmt_p
)
5862 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5868 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5870 tree guard
= (tree
)data
;
5871 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5873 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5874 /* Tell honor_protect_cleanup_actions to handle this as a separate
5876 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5878 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5884 /* We're initializing a local variable which has a cleanup GUARD. If there
5885 are any temporaries used in the initializer INIT of this variable, we
5886 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5887 variable will be cleaned up properly if one of them throws.
5889 Unfortunately, there's no way to express this properly in terms of
5890 nesting, as the regions for the temporaries overlap the region for the
5891 variable itself; if there are two temporaries, the variable needs to be
5892 the first thing destroyed if either of them throws. However, we only
5893 want to run the variable's cleanup if it actually got constructed. So
5894 we need to guard the temporary cleanups with the variable's cleanup if
5895 they are run on the normal path, but not if they are run on the
5896 exceptional path. We implement this by telling
5897 honor_protect_cleanup_actions to strip the variable cleanup from the
5898 exceptional path. */
5901 wrap_temporary_cleanups (tree init
, tree guard
)
5903 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5906 /* Generate code to initialize DECL (a local variable). */
5909 initialize_local_var (tree decl
, tree init
)
5911 tree type
= TREE_TYPE (decl
);
5915 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5916 || TREE_CODE (decl
) == RESULT_DECL
);
5917 gcc_assert (!TREE_STATIC (decl
));
5919 if (DECL_SIZE (decl
) == NULL_TREE
)
5921 /* If we used it already as memory, it must stay in memory. */
5922 DECL_INITIAL (decl
) = NULL_TREE
;
5923 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5927 if (type
== error_mark_node
)
5930 /* Compute and store the initial value. */
5931 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5932 if (TREE_USED (type
))
5933 DECL_READ_P (decl
) = 1;
5935 /* Generate a cleanup, if necessary. */
5936 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5938 /* Perform the initialization. */
5941 if (TREE_CODE (init
) == INIT_EXPR
5942 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5944 /* Stick simple initializers in DECL_INITIAL so that
5945 -Wno-init-self works (c++/34772). */
5946 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5947 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5951 int saved_stmts_are_full_exprs_p
;
5953 /* If we're only initializing a single object, guard the
5954 destructors of any temporaries used in its initializer with
5955 its destructor. This isn't right for arrays because each
5956 element initialization is a full-expression. */
5957 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5958 wrap_temporary_cleanups (init
, cleanup
);
5960 gcc_assert (building_stmt_list_p ());
5961 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5962 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5963 finish_expr_stmt (init
);
5964 current_stmt_tree ()->stmts_are_full_exprs_p
=
5965 saved_stmts_are_full_exprs_p
;
5969 /* Set this to 0 so we can tell whether an aggregate which was
5970 initialized was ever used. Don't do this if it has a
5971 destructor, so we don't complain about the 'resource
5972 allocation is initialization' idiom. Now set
5973 attribute((unused)) on types so decls of that type will be
5974 marked used. (see TREE_USED, above.) */
5975 if (TYPE_NEEDS_CONSTRUCTING (type
)
5977 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5978 && DECL_NAME (decl
))
5979 TREE_USED (decl
) = 0;
5980 else if (already_used
)
5981 TREE_USED (decl
) = 1;
5984 finish_decl_cleanup (decl
, cleanup
);
5987 /* DECL is a VAR_DECL for a compiler-generated variable with static
5988 storage duration (like a virtual table) whose initializer is a
5989 compile-time constant. Initialize the variable and provide it to the
5993 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5996 gcc_assert (DECL_ARTIFICIAL (decl
));
5997 init
= build_constructor (TREE_TYPE (decl
), v
);
5998 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5999 DECL_INITIAL (decl
) = init
;
6000 DECL_INITIALIZED_P (decl
) = 1;
6001 determine_visibility (decl
);
6002 layout_var_decl (decl
);
6003 maybe_commonize_var (decl
);
6004 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6007 /* INIT is the initializer for a variable, as represented by the
6008 parser. Returns true iff INIT is type-dependent. */
6011 type_dependent_init_p (tree init
)
6013 if (TREE_CODE (init
) == TREE_LIST
)
6014 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6015 return any_type_dependent_elements_p (init
);
6016 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6017 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6019 VEC(constructor_elt
, gc
) *elts
;
6023 elts
= CONSTRUCTOR_ELTS (init
);
6024 nelts
= VEC_length (constructor_elt
, elts
);
6025 for (i
= 0; i
< nelts
; ++i
)
6026 if (type_dependent_init_p (VEC_index (constructor_elt
,
6031 /* It must be a simple expression, e.g., int i = 3; */
6032 return type_dependent_expression_p (init
);
6037 /* INIT is the initializer for a variable, as represented by the
6038 parser. Returns true iff INIT is value-dependent. */
6041 value_dependent_init_p (tree init
)
6043 if (TREE_CODE (init
) == TREE_LIST
)
6044 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6045 return any_value_dependent_elements_p (init
);
6046 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6047 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6049 VEC(constructor_elt
, gc
) *elts
;
6053 elts
= CONSTRUCTOR_ELTS (init
);
6054 nelts
= VEC_length (constructor_elt
, elts
);
6055 for (i
= 0; i
< nelts
; ++i
)
6056 if (value_dependent_init_p (VEC_index (constructor_elt
,
6061 /* It must be a simple expression, e.g., int i = 3; */
6062 return value_dependent_expression_p (init
);
6067 /* Finish processing of a declaration;
6068 install its line number and initial value.
6069 If the length of an array type is not known before,
6070 it must be determined now, from the initial value, or it is an error.
6072 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6073 true, then INIT is an integral constant expression.
6075 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6076 if the (init) syntax was used. */
6079 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6080 tree asmspec_tree
, int flags
)
6083 VEC(tree
,gc
) *cleanups
= NULL
;
6084 const char *asmspec
= NULL
;
6085 int was_readonly
= 0;
6086 bool var_definition_p
= false;
6089 if (decl
== error_mark_node
)
6094 error ("assignment (not initialization) in declaration");
6098 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6099 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6100 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6102 type
= TREE_TYPE (decl
);
6103 if (type
== error_mark_node
)
6106 /* If a name was specified, get the string. */
6107 if (at_namespace_scope_p ())
6108 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6109 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6110 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6112 if (current_class_type
6113 && CP_DECL_CONTEXT (decl
) == current_class_type
6114 && TYPE_BEING_DEFINED (current_class_type
)
6115 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6116 && (DECL_INITIAL (decl
) || init
))
6117 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6119 if (TREE_CODE (decl
) != FUNCTION_DECL
6120 && (auto_node
= type_uses_auto (type
)))
6123 if (init
== NULL_TREE
)
6125 error ("declaration of %q#D has no initializer", decl
);
6126 TREE_TYPE (decl
) = error_mark_node
;
6130 if (TREE_CODE (d_init
) == TREE_LIST
)
6131 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6132 tf_warning_or_error
);
6133 d_init
= resolve_nondeduced_context (d_init
);
6134 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6136 if (type
== error_mark_node
)
6140 if (!ensure_literal_type_for_constexpr_object (decl
))
6141 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6143 if (TREE_CODE (decl
) == VAR_DECL
6144 && DECL_CLASS_SCOPE_P (decl
)
6145 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6146 check_static_variable_definition (decl
, type
);
6148 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6151 if (init
== ridpointers
[(int)RID_DELETE
])
6153 /* FIXME check this is 1st decl. */
6154 DECL_DELETED_FN (decl
) = 1;
6155 DECL_DECLARED_INLINE_P (decl
) = 1;
6156 DECL_INITIAL (decl
) = error_mark_node
;
6157 FOR_EACH_CLONE (clone
, decl
)
6159 DECL_DELETED_FN (clone
) = 1;
6160 DECL_DECLARED_INLINE_P (clone
) = 1;
6161 DECL_INITIAL (clone
) = error_mark_node
;
6165 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6167 if (defaultable_fn_check (decl
))
6168 DECL_DEFAULTED_FN (decl
) = 1;
6170 DECL_INITIAL (decl
) = NULL_TREE
;
6174 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6176 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6177 /* If DECL is a reference, then we want to know whether init is a
6178 reference constant; init_const_expr_p as passed tells us whether
6179 it's an rvalue constant. */
6180 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6181 init_const_expr_p
= potential_constant_expression (init
);
6182 if (init_const_expr_p
)
6184 /* Set these flags now for templates. We'll update the flags in
6185 store_init_value for instantiations. */
6186 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6187 if (decl_maybe_constant_var_p (decl
))
6188 TREE_CONSTANT (decl
) = 1;
6192 if (processing_template_decl
)
6194 bool type_dependent_p
;
6196 /* Add this declaration to the statement-tree. */
6197 if (at_function_scope_p ())
6198 add_decl_expr (decl
);
6200 type_dependent_p
= dependent_type_p (type
);
6202 if (check_for_bare_parameter_packs (init
))
6205 DECL_INITIAL (decl
) = NULL_TREE
;
6208 /* Generally, initializers in templates are expanded when the
6209 template is instantiated. But, if DECL is a variable constant
6210 then it can be used in future constant expressions, so its value
6211 must be available. */
6213 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6214 /* We can't do anything if the decl has dependent type. */;
6216 && init_const_expr_p
6217 && !type_dependent_p
6218 && decl_maybe_constant_var_p (decl
)
6219 && !type_dependent_init_p (init
)
6220 && !value_dependent_init_p (init
))
6222 /* This variable seems to be a non-dependent constant, so process
6223 its initializer. If check_initializer returns non-null the
6224 initialization wasn't constant after all. */
6226 cleanups
= make_tree_vector ();
6227 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6228 if (init_code
== NULL_TREE
)
6230 release_tree_vector (cleanups
);
6232 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6234 /* Deduce array size even if the initializer is dependent. */
6235 maybe_deduce_size_from_array_init (decl
, init
);
6236 /* And complain about multiple initializers. */
6237 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6238 && !MAYBE_CLASS_TYPE_P (type
))
6239 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6240 tf_warning_or_error
);
6244 DECL_INITIAL (decl
) = init
;
6248 /* Just store non-static data member initializers for later. */
6249 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6250 DECL_INITIAL (decl
) = init
;
6252 /* Take care of TYPE_DECLs up front. */
6253 if (TREE_CODE (decl
) == TYPE_DECL
)
6255 if (type
!= error_mark_node
6256 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6258 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6259 warning (0, "shadowing previous type declaration of %q#D", decl
);
6260 set_identifier_type_value (DECL_NAME (decl
), decl
);
6263 /* If we have installed this as the canonical typedef for this
6264 type, and that type has not been defined yet, delay emitting
6265 the debug information for it, as we will emit it later. */
6266 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6267 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6268 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6270 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6275 /* A reference will be modified here, as it is initialized. */
6276 if (! DECL_EXTERNAL (decl
)
6277 && TREE_READONLY (decl
)
6278 && TREE_CODE (type
) == REFERENCE_TYPE
)
6281 TREE_READONLY (decl
) = 0;
6284 if (TREE_CODE (decl
) == VAR_DECL
)
6286 /* If this is a local variable that will need a mangled name,
6287 register it now. We must do this before processing the
6288 initializer for the variable, since the initialization might
6289 require a guard variable, and since the mangled name of the
6290 guard variable will depend on the mangled name of this
6292 if (DECL_FUNCTION_SCOPE_P (decl
)
6293 && TREE_STATIC (decl
)
6294 && !DECL_ARTIFICIAL (decl
))
6296 push_local_name (decl
);
6297 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6298 || DECL_DESTRUCTOR_P (current_function_decl
))
6299 /* Normally local_decls is populated during GIMPLE lowering,
6300 but [cd]tors are never actually compiled directly. We need
6301 to put statics on the list so we can deal with the label
6302 address extension. FIXME. */
6303 add_local_decl (cfun
, decl
);
6306 /* Convert the initializer to the type of DECL, if we have not
6307 already initialized DECL. */
6308 if (!DECL_INITIALIZED_P (decl
)
6309 /* If !DECL_EXTERNAL then DECL is being defined. In the
6310 case of a static data member initialized inside the
6311 class-specifier, there can be an initializer even if DECL
6312 is *not* defined. */
6313 && (!DECL_EXTERNAL (decl
) || init
))
6315 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6318 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6319 /* Allow libjava/prims.cc define primitive classes. */
6320 if (init
!= NULL_TREE
6321 || jclass
== NULL_TREE
6322 || TREE_CODE (jclass
) != TYPE_DECL
6323 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6324 || !same_type_ignoring_top_level_qualifiers_p
6325 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6326 error ("Java object %qD not allocated with %<new%>", decl
);
6329 cleanups
= make_tree_vector ();
6330 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6332 /* Check that the initializer for a static data member was a
6333 constant. Although we check in the parser that the
6334 initializer is an integral constant expression, we do not
6335 simplify division-by-zero at the point at which it
6336 occurs. Therefore, in:
6338 struct S { static const int i = 7 / 0; };
6340 we issue an error at this point. It would
6341 probably be better to forbid division by zero in
6342 integral constant expressions. */
6343 if (DECL_EXTERNAL (decl
) && init
)
6345 error ("%qD cannot be initialized by a non-constant expression"
6346 " when being declared", decl
);
6347 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6355 The memory occupied by any object of static storage
6356 duration is zero-initialized at program startup before
6357 any other initialization takes place.
6359 We cannot create an appropriate initializer until after
6360 the type of DECL is finalized. If DECL_INITIAL is set,
6361 then the DECL is statically initialized, and any
6362 necessary zero-initialization has already been performed. */
6363 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6364 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6365 /*nelts=*/NULL_TREE
,
6366 /*static_storage_p=*/true);
6367 /* Remember that the initialization for this variable has
6369 DECL_INITIALIZED_P (decl
) = 1;
6370 /* This declaration is the definition of this variable,
6371 unless we are initializing a static data member within
6372 the class specifier. */
6373 if (!DECL_EXTERNAL (decl
))
6374 var_definition_p
= true;
6376 /* If the variable has an array type, lay out the type, even if
6377 there is no initializer. It is valid to index through the
6378 array, and we must get TYPE_ALIGN set correctly on the array
6380 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6383 if (TREE_STATIC (decl
)
6384 && !at_function_scope_p ()
6385 && current_function_decl
== NULL
)
6386 /* So decl is a global variable or a static member of a
6387 non local class. Record the types it uses
6388 so that we can decide later to emit debug info for them. */
6389 record_types_used_by_current_var_decl (decl
);
6391 else if (TREE_CODE (decl
) == FIELD_DECL
6392 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6393 error ("non-static data member %qD has Java class type", decl
);
6395 /* Add this declaration to the statement-tree. This needs to happen
6396 after the call to check_initializer so that the DECL_EXPR for a
6397 reference temp is added before the DECL_EXPR for the reference itself. */
6398 if (DECL_FUNCTION_SCOPE_P (decl
))
6399 add_decl_expr (decl
);
6401 /* Let the middle end know about variables and functions -- but not
6402 static data members in uninstantiated class templates. */
6403 if (TREE_CODE (decl
) == VAR_DECL
6404 || TREE_CODE (decl
) == FUNCTION_DECL
)
6406 if (TREE_CODE (decl
) == VAR_DECL
)
6408 layout_var_decl (decl
);
6409 maybe_commonize_var (decl
);
6412 /* This needs to happen after the linkage is set. */
6413 determine_visibility (decl
);
6415 if (var_definition_p
&& TREE_STATIC (decl
))
6417 /* If a TREE_READONLY variable needs initialization
6418 at runtime, it is no longer readonly and we need to
6419 avoid MEM_READONLY_P being set on RTL created for it. */
6422 if (TREE_READONLY (decl
))
6423 TREE_READONLY (decl
) = 0;
6426 else if (was_readonly
)
6427 TREE_READONLY (decl
) = 1;
6430 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6432 /* Check for abstractness of the type. Notice that there is no
6433 need to strip array types here since the check for those types
6434 is already done within create_array_type_for_decl. */
6435 if (TREE_CODE (type
) == FUNCTION_TYPE
6436 || TREE_CODE (type
) == METHOD_TYPE
)
6437 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6439 abstract_virtuals_error (decl
, type
);
6441 if (TREE_TYPE (decl
) == error_mark_node
)
6442 /* No initialization required. */
6444 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6448 if (init
== ridpointers
[(int)RID_DEFAULT
])
6450 /* An out-of-class default definition is defined at
6451 the point where it is explicitly defaulted. */
6452 if (DECL_DELETED_FN (decl
))
6453 maybe_explain_implicit_delete (decl
);
6454 else if (DECL_INITIAL (decl
) == error_mark_node
)
6455 synthesize_method (decl
);
6458 error ("function %q#D is initialized like a variable", decl
);
6460 /* else no initialization required. */
6462 else if (DECL_EXTERNAL (decl
)
6463 && ! (DECL_LANG_SPECIFIC (decl
)
6464 && DECL_NOT_REALLY_EXTERN (decl
)))
6467 DECL_INITIAL (decl
) = init
;
6469 /* A variable definition. */
6470 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6471 /* Initialize the local variable. */
6472 initialize_local_var (decl
, init
);
6474 /* If a variable is defined, and then a subsequent
6475 definition with external linkage is encountered, we will
6476 get here twice for the same variable. We want to avoid
6477 calling expand_static_init more than once. For variables
6478 that are not static data members, we can call
6479 expand_static_init only when we actually process the
6480 initializer. It is not legal to redeclare a static data
6481 member, so this issue does not arise in that case. */
6482 else if (var_definition_p
&& TREE_STATIC (decl
))
6483 expand_static_init (decl
, init
);
6486 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6487 reference, insert it in the statement-tree now. */
6491 FOR_EACH_VEC_ELT (tree
, cleanups
, i
, t
)
6492 push_cleanup (decl
, t
, false);
6493 release_tree_vector (cleanups
);
6497 TREE_READONLY (decl
) = 1;
6499 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6502 /* Returns a declaration for a VAR_DECL as if:
6504 extern "C" TYPE NAME;
6506 had been seen. Used to create compiler-generated global
6510 declare_global_var (tree name
, tree type
)
6514 push_to_top_level ();
6515 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6516 TREE_PUBLIC (decl
) = 1;
6517 DECL_EXTERNAL (decl
) = 1;
6518 DECL_ARTIFICIAL (decl
) = 1;
6519 /* If the user has explicitly declared this variable (perhaps
6520 because the code we are compiling is part of a low-level runtime
6521 library), then it is possible that our declaration will be merged
6522 with theirs by pushdecl. */
6523 decl
= pushdecl (decl
);
6524 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6525 pop_from_top_level ();
6530 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6531 if "__cxa_atexit" is not being used) corresponding to the function
6532 to be called when the program exits. */
6535 get_atexit_fn_ptr_type (void)
6539 if (!atexit_fn_ptr_type_node
)
6542 if (flag_use_cxa_atexit
6543 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6544 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6545 arg_type
= ptr_type_node
;
6547 /* The parameter to "atexit" is "void (*)(void)". */
6548 arg_type
= NULL_TREE
;
6550 fn_type
= build_function_type_list (void_type_node
,
6551 arg_type
, NULL_TREE
);
6552 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6555 return atexit_fn_ptr_type_node
;
6558 /* Returns a pointer to the `atexit' function. Note that if
6559 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6560 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6563 get_atexit_node (void)
6569 bool use_aeabi_atexit
;
6574 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6576 /* The declaration for `__cxa_atexit' is:
6578 int __cxa_atexit (void (*)(void *), void *, void *)
6580 We build up the argument types and then the function type
6582 tree argtype0
, argtype1
, argtype2
;
6584 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6585 /* First, build the pointer-to-function type for the first
6587 fn_ptr_type
= get_atexit_fn_ptr_type ();
6588 /* Then, build the rest of the argument types. */
6589 argtype2
= ptr_type_node
;
6590 if (use_aeabi_atexit
)
6592 argtype1
= fn_ptr_type
;
6593 argtype0
= ptr_type_node
;
6597 argtype1
= ptr_type_node
;
6598 argtype0
= fn_ptr_type
;
6600 /* And the final __cxa_atexit type. */
6601 fn_type
= build_function_type_list (integer_type_node
,
6602 argtype0
, argtype1
, argtype2
,
6604 if (use_aeabi_atexit
)
6605 name
= "__aeabi_atexit";
6607 name
= "__cxa_atexit";
6611 /* The declaration for `atexit' is:
6613 int atexit (void (*)());
6615 We build up the argument types and then the function type
6617 fn_ptr_type
= get_atexit_fn_ptr_type ();
6618 /* Build the final atexit type. */
6619 fn_type
= build_function_type_list (integer_type_node
,
6620 fn_ptr_type
, NULL_TREE
);
6624 /* Now, build the function declaration. */
6625 push_lang_context (lang_name_c
);
6626 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6627 mark_used (atexit_fndecl
);
6628 pop_lang_context ();
6629 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6634 /* Like get_atexit_node, but for thread-local cleanups. */
6637 get_thread_atexit_node (void)
6639 /* The declaration for `__cxa_thread_atexit' is:
6641 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6642 tree fn_type
= build_function_type_list (integer_type_node
,
6643 get_atexit_fn_ptr_type (),
6644 ptr_type_node
, ptr_type_node
,
6647 /* Now, build the function declaration. */
6648 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
);
6649 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6652 /* Returns the __dso_handle VAR_DECL. */
6655 get_dso_handle_node (void)
6657 if (dso_handle_node
)
6658 return dso_handle_node
;
6660 /* Declare the variable. */
6661 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6664 #ifdef HAVE_GAS_HIDDEN
6665 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6666 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6669 return dso_handle_node
;
6672 /* Begin a new function with internal linkage whose job will be simply
6673 to destroy some particular variable. */
6675 static GTY(()) int start_cleanup_cnt
;
6678 start_cleanup_fn (void)
6683 bool use_cxa_atexit
= flag_use_cxa_atexit
6684 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6686 push_to_top_level ();
6688 /* No need to mangle this. */
6689 push_lang_context (lang_name_c
);
6691 /* Build the name of the function. */
6692 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6693 /* Build the function declaration. */
6694 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6695 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6696 /* It's a function with internal linkage, generated by the
6698 TREE_PUBLIC (fndecl
) = 0;
6699 DECL_ARTIFICIAL (fndecl
) = 1;
6700 /* Make the function `inline' so that it is only emitted if it is
6701 actually needed. It is unlikely that it will be inlined, since
6702 it is only called via a function pointer, but we avoid unnecessary
6703 emissions this way. */
6704 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6705 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6706 /* Build the parameter. */
6711 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6712 DECL_CONTEXT (parmdecl
) = fndecl
;
6713 TREE_USED (parmdecl
) = 1;
6714 DECL_READ_P (parmdecl
) = 1;
6715 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6719 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6721 pop_lang_context ();
6723 return current_function_decl
;
6726 /* Finish the cleanup function begun by start_cleanup_fn. */
6729 end_cleanup_fn (void)
6731 expand_or_defer_fn (finish_function (0));
6733 pop_from_top_level ();
6736 /* Generate code to handle the destruction of DECL, an object with
6737 static storage duration. */
6740 register_dtor_fn (tree decl
)
6747 bool ob_parm
, dso_parm
, use_dtor
;
6748 tree arg0
, arg1
, arg2
;
6751 type
= TREE_TYPE (decl
);
6752 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6753 return void_zero_node
;
6755 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6756 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6757 destructor to "__cxa_atexit"; we don't have to build a temporary
6758 function to do the cleanup. */
6759 ob_parm
= (DECL_THREAD_LOCAL_P (decl
)
6760 || (flag_use_cxa_atexit
6761 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()));
6763 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6768 /* Find the destructor. */
6769 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6770 gcc_assert (idx
>= 0);
6771 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6772 /* Make sure it is accessible. */
6773 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6774 tf_warning_or_error
);
6778 /* Call build_cleanup before we enter the anonymous function so
6779 that any access checks will be done relative to the current
6780 scope, rather than the scope of the anonymous function. */
6781 build_cleanup (decl
);
6783 /* Now start the function. */
6784 cleanup
= start_cleanup_fn ();
6786 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6787 to the original function, rather than the anonymous one. That
6788 will make the back end think that nested functions are in use,
6789 which causes confusion. */
6790 push_deferring_access_checks (dk_no_check
);
6791 fcall
= build_cleanup (decl
);
6792 pop_deferring_access_checks ();
6794 /* Create the body of the anonymous function. */
6795 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6796 finish_expr_stmt (fcall
);
6797 finish_compound_stmt (compound_stmt
);
6801 /* Call atexit with the cleanup function. */
6802 mark_used (cleanup
);
6803 cleanup
= build_address (cleanup
);
6805 if (DECL_THREAD_LOCAL_P (decl
))
6806 atex_node
= get_thread_atexit_node ();
6808 atex_node
= get_atexit_node ();
6812 /* We must convert CLEANUP to the type that "__cxa_atexit"
6814 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6815 /* "__cxa_atexit" will pass the address of DECL to the
6816 cleanup function. */
6818 addr
= build_address (decl
);
6819 /* The declared type of the parameter to "__cxa_atexit" is
6820 "void *". For plain "T*", we could just let the
6821 machinery in cp_build_function_call convert it -- but if the
6822 type is "cv-qualified T *", then we need to convert it
6823 before passing it in, to avoid spurious errors. */
6824 addr
= build_nop (ptr_type_node
, addr
);
6827 /* Since the cleanup functions we build ignore the address
6828 they're given, there's no reason to pass the actual address
6829 in, and, in general, it's cheaper to pass NULL than any
6831 addr
= null_pointer_node
;
6834 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6835 tf_warning_or_error
);
6841 if (!DECL_THREAD_LOCAL_P (decl
)
6842 && targetm
.cxx
.use_aeabi_atexit ())
6858 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6859 arg0
, arg1
, arg2
, NULL_TREE
);
6862 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6863 is its initializer. Generate code to handle the construction
6864 and destruction of DECL. */
6867 expand_static_init (tree decl
, tree init
)
6869 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6870 gcc_assert (TREE_STATIC (decl
));
6872 /* Some variables require no dynamic initialization. */
6874 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6877 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6878 && !DECL_FUNCTION_SCOPE_P (decl
))
6881 error ("non-local variable %qD declared %<__thread%> "
6882 "needs dynamic initialization", decl
);
6884 error ("non-local variable %qD declared %<__thread%> "
6885 "has a non-trivial destructor", decl
);
6886 static bool informed
;
6889 inform (DECL_SOURCE_LOCATION (decl
),
6890 "C++11 %<thread_local%> allows dynamic initialization "
6897 if (DECL_FUNCTION_SCOPE_P (decl
))
6899 /* Emit code to perform this initialization but once. */
6900 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6901 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6902 tree guard
, guard_addr
;
6904 /* We don't need thread-safety code for thread-local vars. */
6905 bool thread_guard
= (flag_threadsafe_statics
6906 && !DECL_THREAD_LOCAL_P (decl
));
6908 /* Emit code to perform this initialization but once. This code
6911 static <type> guard;
6912 if (!guard.first_byte) {
6913 if (__cxa_guard_acquire (&guard)) {
6916 // Do initialization.
6917 flag = true; __cxa_guard_release (&guard);
6918 // Register variable for destruction at end of program.
6920 if (!flag) __cxa_guard_abort (&guard);
6924 Note that the `flag' variable is only set to 1 *after* the
6925 initialization is complete. This ensures that an exception,
6926 thrown during the construction, will cause the variable to
6927 reinitialized when we pass through this code again, as per:
6931 If the initialization exits by throwing an exception, the
6932 initialization is not complete, so it will be tried again
6933 the next time control enters the declaration.
6935 This process should be thread-safe, too; multiple threads
6936 should not be able to initialize the variable more than
6939 /* Create the guard variable. */
6940 guard
= get_guard (decl
);
6942 /* This optimization isn't safe on targets with relaxed memory
6943 consistency. On such targets we force synchronization in
6944 __cxa_guard_acquire. */
6945 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6947 /* Begin the conditional initialization. */
6948 if_stmt
= begin_if_stmt ();
6949 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6950 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6955 tree vfntype
= NULL_TREE
;
6956 tree acquire_name
, release_name
, abort_name
;
6957 tree acquire_fn
, release_fn
, abort_fn
;
6958 guard_addr
= build_address (guard
);
6960 acquire_name
= get_identifier ("__cxa_guard_acquire");
6961 release_name
= get_identifier ("__cxa_guard_release");
6962 abort_name
= get_identifier ("__cxa_guard_abort");
6963 acquire_fn
= identifier_global_value (acquire_name
);
6964 release_fn
= identifier_global_value (release_name
);
6965 abort_fn
= identifier_global_value (abort_name
);
6967 acquire_fn
= push_library_fn
6968 (acquire_name
, build_function_type_list (integer_type_node
,
6969 TREE_TYPE (guard_addr
),
6972 if (!release_fn
|| !abort_fn
)
6973 vfntype
= build_function_type_list (void_type_node
,
6974 TREE_TYPE (guard_addr
),
6977 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6979 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6981 inner_if_stmt
= begin_if_stmt ();
6982 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6985 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6986 begin
= get_target_expr (boolean_false_node
);
6987 flag
= TARGET_EXPR_SLOT (begin
);
6989 TARGET_EXPR_CLEANUP (begin
)
6990 = build3 (COND_EXPR
, void_type_node
, flag
,
6992 build_call_n (abort_fn
, 1, guard_addr
));
6993 CLEANUP_EH_ONLY (begin
) = 1;
6995 /* Do the initialization itself. */
6996 init
= add_stmt_to_compound (begin
, init
);
6997 init
= add_stmt_to_compound
6998 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6999 init
= add_stmt_to_compound
7000 (init
, build_call_n (release_fn
, 1, guard_addr
));
7003 init
= add_stmt_to_compound (init
, set_guard (guard
));
7005 /* Use atexit to register a function for destroying this static
7007 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7009 finish_expr_stmt (init
);
7013 finish_compound_stmt (inner_then_clause
);
7014 finish_then_clause (inner_if_stmt
);
7015 finish_if_stmt (inner_if_stmt
);
7018 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7020 finish_compound_stmt (then_clause
);
7021 finish_then_clause (if_stmt
);
7022 finish_if_stmt (if_stmt
);
7025 else if (DECL_THREAD_LOCAL_P (decl
))
7026 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7028 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7032 /* Make TYPE a complete type based on INITIAL_VALUE.
7033 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7034 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7035 3 if the initializer list is empty (in pedantic mode). */
7038 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7041 tree type
, elt_type
;
7045 unsigned HOST_WIDE_INT i
;
7048 /* An array of character type can be initialized from a
7049 brace-enclosed string constant.
7051 FIXME: this code is duplicated from reshape_init. Probably
7052 we should just call reshape_init here? */
7053 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7054 && TREE_CODE (initial_value
) == CONSTRUCTOR
7055 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
7057 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
7058 tree value
= VEC_index (constructor_elt
, v
, 0).value
;
7060 if (TREE_CODE (value
) == STRING_CST
7061 && VEC_length (constructor_elt
, v
) == 1)
7062 initial_value
= value
;
7065 /* If any of the elements are parameter packs, we can't actually
7066 complete this type now because the array size is dependent. */
7067 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7069 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7072 if (PACK_EXPANSION_P (value
))
7078 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7080 /* We can create the array before the element type is complete, which
7081 means that we didn't have these two bits set in the original type
7082 either. In completing the type, we are expected to propagate these
7083 bits. See also complete_type which does the same thing for arrays
7086 if (TYPE_DOMAIN (type
))
7088 elt_type
= TREE_TYPE (type
);
7089 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7090 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7091 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7097 /* As above, but either give an error or reject zero-size arrays, depending
7101 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7102 bool do_default
, tsubst_flags_t complain
)
7105 bool sfinae
= !(complain
& tf_error
);
7106 /* In SFINAE context we can't be lenient about zero-size arrays. */
7109 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7115 /* Not an error. */;
7116 else if (failure
== 1)
7117 error ("initializer fails to determine size of %qT", *ptype
);
7118 else if (failure
== 2)
7121 error ("array size missing in %qT", *ptype
);
7123 else if (failure
== 3)
7124 error ("zero-size array %qT", *ptype
);
7125 *ptype
= error_mark_node
;
7130 /* Return zero if something is declared to be a member of type
7131 CTYPE when in the context of CUR_TYPE. STRING is the error
7132 message to print in that case. Otherwise, quietly return 1. */
7135 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7137 if (ctype
&& ctype
!= cur_type
)
7139 if (flags
== DTOR_FLAG
)
7140 error ("destructor for alien class %qT cannot be a member", ctype
);
7142 error ("constructor for alien class %qT cannot be a member", ctype
);
7148 /* Subroutine of `grokdeclarator'. */
7150 /* Generate errors possibly applicable for a given set of specifiers.
7151 This is for ARM $7.1.2. */
7154 bad_specifiers (tree object
,
7155 enum bad_spec_place type
,
7166 error ("%qD declared as a %<virtual%> variable", object
);
7168 error ("%qD declared as an %<inline%> variable", object
);
7170 error ("%<const%> and %<volatile%> function specifiers on "
7171 "%qD invalid in variable declaration", object
);
7175 error ("%qD declared as a %<virtual%> parameter", object
);
7177 error ("%qD declared as an %<inline%> parameter", object
);
7179 error ("%<const%> and %<volatile%> function specifiers on "
7180 "%qD invalid in parameter declaration", object
);
7184 error ("%qD declared as a %<virtual%> type", object
);
7186 error ("%qD declared as an %<inline%> type", object
);
7188 error ("%<const%> and %<volatile%> function specifiers on "
7189 "%qD invalid in type declaration", object
);
7193 error ("%qD declared as a %<virtual%> field", object
);
7195 error ("%qD declared as an %<inline%> field", object
);
7197 error ("%<const%> and %<volatile%> function specifiers on "
7198 "%qD invalid in field declaration", object
);
7204 error ("%q+D declared as a friend", object
);
7206 && (TREE_CODE (object
) == TYPE_DECL
7207 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7208 && !TYPE_REFFN_P (TREE_TYPE (object
))
7209 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7210 error ("%q+D declared with an exception specification", object
);
7213 /* DECL is a member function or static data member and is presently
7214 being defined. Check that the definition is taking place in a
7218 check_class_member_definition_namespace (tree decl
)
7220 /* These checks only apply to member functions and static data
7222 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7223 || TREE_CODE (decl
) == VAR_DECL
);
7224 /* We check for problems with specializations in pt.c in
7225 check_specialization_namespace, where we can issue better
7227 if (processing_specialization
)
7229 /* There are no restrictions on the placement of
7230 explicit instantiations. */
7231 if (processing_explicit_instantiation
)
7235 A member function definition that appears outside of the
7236 class definition shall appear in a namespace scope enclosing
7237 the class definition.
7241 The definition for a static data member shall appear in a
7242 namespace scope enclosing the member's class definition. */
7243 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7244 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7245 decl
, DECL_CONTEXT (decl
));
7248 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7249 METHOD_TYPE for a non-static member function; QUALS are the
7250 cv-qualifiers that apply to the function. */
7253 build_this_parm (tree type
, cp_cv_quals quals
)
7258 cp_cv_quals this_quals
;
7260 if (CLASS_TYPE_P (type
))
7263 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7264 this_type
= build_pointer_type (this_type
);
7267 this_type
= type_of_this_parm (type
);
7268 /* The `this' parameter is implicitly `const'; it cannot be
7270 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7271 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7272 parm
= build_artificial_parm (this_identifier
, qual_type
);
7273 cp_apply_type_quals_to_decl (this_quals
, parm
);
7277 /* DECL is a static member function. Complain if it was declared
7278 with function-cv-quals. */
7281 check_static_quals (tree decl
, cp_cv_quals quals
)
7283 if (quals
!= TYPE_UNQUALIFIED
)
7284 error ("static member function %q#D declared with type qualifiers",
7288 /* CTYPE is class type, or null if non-class.
7289 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7291 DECLARATOR is the function's name.
7292 PARMS is a chain of PARM_DECLs for the function.
7293 VIRTUALP is truthvalue of whether the function is virtual or not.
7294 FLAGS are to be passed through to `grokclassfn'.
7295 QUALS are qualifiers indicating whether the function is `const'
7297 RAISES is a list of exceptions that this function can raise.
7298 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7299 not look, and -1 if we should not call `grokclassfn' at all.
7301 SFK is the kind of special function (if any) for the new function.
7303 Returns `NULL_TREE' if something goes wrong, after issuing
7304 applicable error messages. */
7307 grokfndecl (tree ctype
,
7311 tree orig_declarator
,
7313 enum overload_flags flags
,
7320 special_function_kind sfk
,
7325 location_t location
)
7328 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7332 type
= build_exception_variant (type
, raises
);
7334 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7336 /* If we have an explicit location, use it, otherwise use whatever
7337 build_lang_decl used (probably input_location). */
7338 if (location
!= UNKNOWN_LOCATION
)
7339 DECL_SOURCE_LOCATION (decl
) = location
;
7341 if (TREE_CODE (type
) == METHOD_TYPE
)
7344 parm
= build_this_parm (type
, quals
);
7345 DECL_CHAIN (parm
) = parms
;
7348 DECL_ARGUMENTS (decl
) = parms
;
7349 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7350 DECL_CONTEXT (t
) = decl
;
7351 /* Propagate volatile out from type to decl. */
7352 if (TYPE_VOLATILE (type
))
7353 TREE_THIS_VOLATILE (decl
) = 1;
7355 /* Setup decl according to sfk. */
7358 case sfk_constructor
:
7359 case sfk_copy_constructor
:
7360 case sfk_move_constructor
:
7361 DECL_CONSTRUCTOR_P (decl
) = 1;
7363 case sfk_destructor
:
7364 DECL_DESTRUCTOR_P (decl
) = 1;
7370 /* If pointers to member functions use the least significant bit to
7371 indicate whether a function is virtual, ensure a pointer
7372 to this function will have that bit clear. */
7373 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7374 && TREE_CODE (type
) == METHOD_TYPE
7375 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7376 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7379 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7383 ("defining explicit specialization %qD in friend declaration",
7387 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7388 tree args
= TREE_OPERAND (orig_declarator
, 1);
7390 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7392 /* Something like `template <class T> friend void f<T>()'. */
7393 error ("invalid use of template-id %qD in declaration "
7394 "of primary template",
7400 /* A friend declaration of the form friend void f<>(). Record
7401 the information in the TEMPLATE_ID_EXPR. */
7402 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7404 if (TREE_CODE (fns
) == COMPONENT_REF
)
7406 /* Due to bison parser ickiness, we will have already looked
7407 up an operator_name or PFUNCNAME within the current class
7408 (see template_id in parse.y). If the current class contains
7409 such a name, we'll get a COMPONENT_REF here. Undo that. */
7411 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7412 == current_class_type
);
7413 fns
= TREE_OPERAND (fns
, 1);
7415 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7416 || TREE_CODE (fns
) == OVERLOAD
);
7417 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7419 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7420 if (TREE_PURPOSE (t
)
7421 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7423 error ("default arguments are not allowed in declaration "
7424 "of friend template specialization %qD",
7431 error ("%<inline%> is not allowed in declaration of friend "
7432 "template specialization %qD",
7439 /* If this decl has namespace scope, set that up. */
7441 set_decl_namespace (decl
, in_namespace
, friendp
);
7443 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7445 /* `main' and builtins have implicit 'C' linkage. */
7446 if ((MAIN_NAME_P (declarator
)
7447 || (IDENTIFIER_LENGTH (declarator
) > 10
7448 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7449 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7450 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7451 && current_lang_name
== lang_name_cplusplus
7452 && ctype
== NULL_TREE
7453 && DECL_FILE_SCOPE_P (decl
))
7454 SET_DECL_LANGUAGE (decl
, lang_c
);
7456 /* Should probably propagate const out from type to decl I bet (mrs). */
7459 DECL_STATIC_FUNCTION_P (decl
) = 1;
7460 DECL_CONTEXT (decl
) = ctype
;
7465 DECL_CONTEXT (decl
) = ctype
;
7467 check_class_member_definition_namespace (decl
);
7470 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7472 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7473 error ("cannot declare %<::main%> to be a template");
7475 error ("cannot declare %<::main%> to be inline");
7477 error ("cannot declare %<::main%> to be static");
7482 /* Members of anonymous types and local classes have no linkage; make
7483 them internal. If a typedef is made later, this will be changed. */
7484 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7485 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7488 if (publicp
&& cxx_dialect
== cxx98
)
7490 /* [basic.link]: A name with no linkage (notably, the name of a class
7491 or enumeration declared in a local scope) shall not be used to
7492 declare an entity with linkage.
7494 DR 757 relaxes this restriction for C++0x. */
7495 t
= no_linkage_check (TREE_TYPE (decl
),
7496 /*relaxed_p=*/false);
7499 if (TYPE_ANONYMOUS_P (t
))
7501 if (DECL_EXTERN_C_P (decl
))
7502 /* Allow this; it's pretty common in C. */;
7505 permerror (input_location
, "anonymous type with no linkage "
7506 "used to declare function %q#D with linkage",
7508 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7509 permerror (input_location
, "%q+#D does not refer to the unqualified "
7510 "type, so it is not used for linkage",
7515 permerror (input_location
, "type %qT with no linkage used to "
7516 "declare function %q#D with linkage", t
, decl
);
7520 TREE_PUBLIC (decl
) = publicp
;
7523 DECL_INTERFACE_KNOWN (decl
) = 1;
7524 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7527 /* If the declaration was declared inline, mark it as such. */
7529 DECL_DECLARED_INLINE_P (decl
) = 1;
7531 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7533 DECL_EXTERNAL (decl
) = 1;
7534 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7537 ? G_("static member function %qD cannot have cv-qualifier")
7538 : G_("non-member function %qD cannot have cv-qualifier"),
7540 quals
= TYPE_UNQUALIFIED
;
7543 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7544 && !grok_op_properties (decl
, /*complain=*/true))
7546 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7548 bool long_long_unsigned_p
;
7550 const char *suffix
= NULL
;
7551 /* [over.literal]/6: Literal operators shall not have C linkage. */
7552 if (DECL_LANGUAGE (decl
) == lang_c
)
7554 error ("literal operator with C linkage");
7558 if (DECL_NAMESPACE_SCOPE_P (decl
))
7560 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7563 error ("%qD has invalid argument list", decl
);
7567 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7568 if (long_long_unsigned_p
)
7570 if (cpp_interpret_int_suffix (suffix
, strlen (suffix
)))
7571 warning (0, "integer suffix %<%s%>"
7572 " shadowed by implementation", suffix
);
7574 else if (long_double_p
)
7576 if (cpp_interpret_float_suffix (suffix
, strlen (suffix
)))
7577 warning (0, "floating point suffix %<%s%>"
7578 " shadowed by implementation", suffix
);
7583 error ("%qD must be a non-member function", decl
);
7589 /* Make the init_value nonzero so pushdecl knows this is not
7590 tentative. error_mark_node is replaced later with the BLOCK. */
7591 DECL_INITIAL (decl
) = error_mark_node
;
7593 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7594 TREE_NOTHROW (decl
) = 1;
7596 /* Caller will do the rest of this. */
7600 if (ctype
!= NULL_TREE
)
7601 grokclassfn (ctype
, decl
, flags
);
7604 if (cxx_dialect
>= cxx0x
7605 && DECL_DESTRUCTOR_P (decl
)
7606 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7607 && !processing_template_decl
)
7608 deduce_noexcept_on_destructor (decl
);
7610 decl
= check_explicit_specialization (orig_declarator
, decl
,
7613 4 * (friendp
!= 0));
7614 if (decl
== error_mark_node
)
7617 if (DECL_STATIC_FUNCTION_P (decl
))
7618 check_static_quals (decl
, quals
);
7622 cplus_decl_attributes (&decl
, *attrlist
, 0);
7623 *attrlist
= NULL_TREE
;
7626 /* Check main's type after attributes have been applied. */
7627 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7629 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7632 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7634 error ("%<::main%> must return %<int%>");
7635 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7636 TREE_TYPE (decl
) = newtype
;
7639 check_main_parameter_types (decl
);
7642 if (ctype
!= NULL_TREE
7643 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7646 tree old_decl
= check_classfn (ctype
, decl
,
7647 (processing_template_decl
7648 > template_class_depth (ctype
))
7649 ? current_template_parms
7652 if (old_decl
== error_mark_node
)
7660 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7661 /* Because grokfndecl is always supposed to return a
7662 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7663 here. We depend on our callers to figure out that its
7664 really a template that's being returned. */
7665 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7667 if (DECL_STATIC_FUNCTION_P (old_decl
)
7668 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7670 /* Remove the `this' parm added by grokclassfn. */
7671 revert_static_member_fn (decl
);
7672 check_static_quals (decl
, quals
);
7674 if (DECL_ARTIFICIAL (old_decl
))
7676 error ("definition of implicitly-declared %qD", old_decl
);
7679 else if (DECL_DEFAULTED_FN (old_decl
))
7681 error ("definition of explicitly-defaulted %q+D", decl
);
7682 error ("%q+#D explicitly defaulted here", old_decl
);
7686 /* Since we've smashed OLD_DECL to its
7687 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7688 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7689 decl
= DECL_TEMPLATE_RESULT (decl
);
7691 /* Attempt to merge the declarations. This can fail, in
7692 the case of some invalid specialization declarations. */
7693 pushed_scope
= push_scope (ctype
);
7694 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7696 pop_scope (pushed_scope
);
7699 error ("no %q#D member function declared in class %qT",
7707 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7710 if (ctype
== NULL_TREE
|| check
)
7714 DECL_VIRTUAL_P (decl
) = 1;
7719 /* decl is a FUNCTION_DECL.
7720 specifiers are the parsed virt-specifiers.
7722 Set flags to reflect the virt-specifiers.
7727 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7729 if (decl
== NULL_TREE
)
7731 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7732 DECL_OVERRIDE_P (decl
) = 1;
7733 if (specifiers
& VIRT_SPEC_FINAL
)
7734 DECL_FINAL_P (decl
) = 1;
7738 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7739 the linkage that DECL will receive in the object file. */
7742 set_linkage_for_static_data_member (tree decl
)
7744 /* A static data member always has static storage duration and
7745 external linkage. Note that static data members are forbidden in
7746 local classes -- the only situation in which a class has
7747 non-external linkage. */
7748 TREE_PUBLIC (decl
) = 1;
7749 TREE_STATIC (decl
) = 1;
7750 /* For non-template classes, static data members are always put
7751 out in exactly those files where they are defined, just as
7752 with ordinary namespace-scope variables. */
7753 if (!processing_template_decl
)
7754 DECL_INTERFACE_KNOWN (decl
) = 1;
7757 /* Create a VAR_DECL named NAME with the indicated TYPE.
7759 If SCOPE is non-NULL, it is the class type or namespace containing
7760 the variable. If SCOPE is NULL, the variable should is created in
7761 the innermost enclosings scope. */
7764 grokvardecl (tree type
,
7766 const cp_decl_specifier_seq
*declspecs
,
7772 tree explicit_scope
;
7774 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7776 /* Compute the scope in which to place the variable, but remember
7777 whether or not that scope was explicitly specified by the user. */
7778 explicit_scope
= scope
;
7781 /* An explicit "extern" specifier indicates a namespace-scope
7783 if (declspecs
->storage_class
== sc_extern
)
7784 scope
= current_decl_namespace ();
7785 else if (!at_function_scope_p ())
7786 scope
= current_scope ();
7790 && (/* If the variable is a namespace-scope variable declared in a
7791 template, we need DECL_LANG_SPECIFIC. */
7792 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7793 /* Similarly for namespace-scope variables with language linkage
7795 || (TREE_CODE (scope
) == NAMESPACE_DECL
7796 && current_lang_name
!= lang_name_cplusplus
)
7797 /* Similarly for static data members. */
7799 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7801 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7803 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7804 set_decl_namespace (decl
, explicit_scope
, 0);
7806 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7808 if (declspecs
->storage_class
== sc_extern
)
7810 DECL_THIS_EXTERN (decl
) = 1;
7811 DECL_EXTERNAL (decl
) = !initialized
;
7814 if (DECL_CLASS_SCOPE_P (decl
))
7816 set_linkage_for_static_data_member (decl
);
7817 /* This function is only called with out-of-class definitions. */
7818 DECL_EXTERNAL (decl
) = 0;
7819 check_class_member_definition_namespace (decl
);
7821 /* At top level, either `static' or no s.c. makes a definition
7822 (perhaps tentative), and absence of `static' makes it public. */
7823 else if (toplevel_bindings_p ())
7825 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7826 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7827 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7829 /* Not at top level, only `static' makes a static definition. */
7832 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7833 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7836 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7838 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7839 if (declspecs
->gnu_thread_keyword_p
)
7840 DECL_GNU_TLS_P (decl
) = true;
7843 /* If the type of the decl has no linkage, make sure that we'll
7844 notice that in mark_used. */
7845 if (cxx_dialect
> cxx98
7846 && decl_linkage (decl
) != lk_none
7847 && DECL_LANG_SPECIFIC (decl
) == NULL
7848 && !DECL_EXTERN_C_P (decl
)
7849 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7850 retrofit_lang_decl (decl
);
7852 if (TREE_PUBLIC (decl
))
7854 /* [basic.link]: A name with no linkage (notably, the name of a class
7855 or enumeration declared in a local scope) shall not be used to
7856 declare an entity with linkage.
7858 DR 757 relaxes this restriction for C++0x. */
7859 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7860 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7863 if (TYPE_ANONYMOUS_P (t
))
7865 if (DECL_EXTERN_C_P (decl
))
7866 /* Allow this; it's pretty common in C. */
7870 /* DRs 132, 319 and 389 seem to indicate types with
7871 no linkage can only be used to declare extern "C"
7872 entities. Since it's not always an error in the
7873 ISO C++ 90 Standard, we only issue a warning. */
7874 warning (0, "anonymous type with no linkage used to declare "
7875 "variable %q#D with linkage", decl
);
7876 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7877 warning (0, "%q+#D does not refer to the unqualified "
7878 "type, so it is not used for linkage",
7883 warning (0, "type %qT with no linkage used to declare variable "
7884 "%q#D with linkage", t
, decl
);
7888 DECL_INTERFACE_KNOWN (decl
) = 1;
7893 /* Create and return a canonical pointer to member function type, for
7894 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7897 build_ptrmemfunc_type (tree type
)
7901 tree unqualified_variant
= NULL_TREE
;
7903 if (type
== error_mark_node
)
7906 /* If a canonical type already exists for this type, use it. We use
7907 this method instead of type_hash_canon, because it only does a
7908 simple equality check on the list of field members. */
7910 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7913 /* Make sure that we always have the unqualified pointer-to-member
7915 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7917 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7919 t
= make_class_type (RECORD_TYPE
);
7920 xref_basetypes (t
, NULL_TREE
);
7922 /* Let the front end know this is a pointer to member function... */
7923 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7924 /* ... and not really a class type. */
7925 SET_CLASS_TYPE_P (t
, 0);
7927 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7930 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7932 DECL_CHAIN (field
) = fields
;
7935 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7937 /* Zap out the name so that the back end will give us the debugging
7938 information for this anonymous RECORD_TYPE. */
7939 TYPE_NAME (t
) = NULL_TREE
;
7941 /* If this is not the unqualified form of this pointer-to-member
7942 type, set the TYPE_MAIN_VARIANT for this type to be the
7943 unqualified type. Since they are actually RECORD_TYPEs that are
7944 not variants of each other, we must do this manually.
7945 As we just built a new type there is no need to do yet another copy. */
7946 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7948 int type_quals
= cp_type_quals (type
);
7949 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7950 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7951 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7952 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7953 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7954 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7955 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7958 /* Cache this pointer-to-member type so that we can find it again
7960 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7962 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7963 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7964 else if (TYPE_CANONICAL (type
) != type
)
7965 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7970 /* Create and return a pointer to data member type. */
7973 build_ptrmem_type (tree class_type
, tree member_type
)
7975 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7977 cp_cv_quals quals
= type_memfn_quals (member_type
);
7978 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7979 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7983 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7984 return build_offset_type (class_type
, member_type
);
7988 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7989 Check to see that the definition is valid. Issue appropriate error
7990 messages. Return 1 if the definition is particularly bad, or 0
7994 check_static_variable_definition (tree decl
, tree type
)
7996 /* Can't check yet if we don't know the type. */
7997 if (dependent_type_p (type
))
7999 /* If DECL is declared constexpr, we'll do the appropriate checks
8000 in check_initializer. */
8001 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8003 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8005 if (!COMPLETE_TYPE_P (type
))
8006 error ("in-class initialization of static data member %q#D of "
8007 "incomplete type", decl
);
8008 else if (literal_type_p (type
))
8009 permerror (input_location
,
8010 "%<constexpr%> needed for in-class initialization of "
8011 "static data member %q#D of non-integral type", decl
);
8013 error ("in-class initialization of static data member %q#D of "
8014 "non-literal type", decl
);
8018 /* Motion 10 at San Diego: If a static const integral data member is
8019 initialized with an integral constant expression, the initializer
8020 may appear either in the declaration (within the class), or in
8021 the definition, but not both. If it appears in the class, the
8022 member is a member constant. The file-scope definition is always
8024 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8026 error ("invalid in-class initialization of static data member "
8027 "of non-integral type %qT",
8031 else if (!CP_TYPE_CONST_P (type
))
8032 error ("ISO C++ forbids in-class initialization of non-const "
8033 "static member %qD",
8035 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8036 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8037 "%qD of non-integral type %qT", decl
, type
);
8042 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8043 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8044 expressions out into temporary variables so that walk_tree doesn't
8045 step into them (c++/15764). */
8048 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8050 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8051 tree expr
= *expr_p
;
8052 if (TREE_CODE (expr
) == SAVE_EXPR
)
8054 tree op
= TREE_OPERAND (expr
, 0);
8055 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8056 if (TREE_SIDE_EFFECTS (op
))
8057 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8060 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8065 /* Entry point for the above. */
8068 stabilize_vla_size (tree size
)
8070 struct pointer_set_t
*pset
= pointer_set_create ();
8071 /* Break out any function calls into temporary variables. */
8072 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8073 pointer_set_destroy (pset
);
8076 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8077 not inside of SAVE_EXPR and fold them. */
8080 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8082 tree expr
= *expr_p
;
8083 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8085 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8087 *(bool *)data
= true;
8088 if (SIZEOF_EXPR_TYPE_P (expr
))
8089 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8090 SIZEOF_EXPR
, false);
8091 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8092 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8095 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8097 if (expr
== error_mark_node
)
8098 expr
= size_one_node
;
8105 /* Given the SIZE (i.e., number of elements) in an array, compute an
8106 appropriate index type for the array. If non-NULL, NAME is the
8107 name of the thing being declared. */
8110 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8114 tree abi_1_itype
= NULL_TREE
;
8116 if (error_operand_p (size
))
8117 return error_mark_node
;
8119 if (!type_dependent_expression_p (size
))
8121 tree type
= TREE_TYPE (size
);
8123 mark_rvalue_use (size
);
8125 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
8126 && TREE_SIDE_EFFECTS (size
))
8127 /* In C++98, we mark a non-constant array bound with a magic
8128 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8131 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8133 if (CLASS_TYPE_P (type
)
8134 && CLASSTYPE_LITERAL_P (type
))
8136 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8139 if (!(complain
& tf_error
))
8140 return error_mark_node
;
8142 error ("size of array %qD has non-integral type %qT",
8145 error ("size of array has non-integral type %qT", type
);
8146 size
= integer_one_node
;
8148 if (size
== error_mark_node
)
8149 return error_mark_node
;
8150 type
= TREE_TYPE (size
);
8151 /* We didn't support this case in GCC 3.2, so don't bother
8152 trying to model it now in ABI v1. */
8153 abi_1_itype
= error_mark_node
;
8156 size
= maybe_constant_value (size
);
8157 if (!TREE_CONSTANT (size
))
8161 if (error_operand_p (size
))
8162 return error_mark_node
;
8164 /* The array bound must be an integer type. */
8165 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8167 if (!(complain
& tf_error
))
8168 return error_mark_node
;
8170 error ("size of array %qD has non-integral type %qT", name
, type
);
8172 error ("size of array has non-integral type %qT", type
);
8173 size
= integer_one_node
;
8174 type
= TREE_TYPE (size
);
8178 /* A type is dependent if it is...an array type constructed from any
8179 dependent type or whose size is specified by a constant expression
8180 that is value-dependent. */
8181 /* We can only call value_dependent_expression_p on integral constant
8182 expressions; treat non-constant expressions as dependent, too. */
8183 if (processing_template_decl
8184 && (type_dependent_expression_p (size
)
8185 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8187 /* We cannot do any checking for a SIZE that isn't known to be
8188 constant. Just build the index type and mark that it requires
8189 structural equality checks. */
8190 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8191 size
, integer_one_node
));
8192 TYPE_DEPENDENT_P (itype
) = 1;
8193 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8194 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8198 if (!abi_version_at_least (2) && processing_template_decl
8199 && abi_1_itype
== NULL_TREE
)
8200 /* For abi-1, we handled all instances in templates the same way,
8201 even when they were non-dependent. This affects the manglings
8202 produced. So, we do the normal checking for non-dependent
8203 sizes, but at the end we'll return the same type that abi-1
8204 would have, but with TYPE_CANONICAL set to the "right"
8205 value that the current ABI would provide. */
8206 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8207 osize
, integer_one_node
));
8209 /* Normally, the array-bound will be a constant. */
8210 if (TREE_CODE (size
) == INTEGER_CST
)
8212 /* Check to see if the array bound overflowed. Make that an
8213 error, no matter how generous we're being. */
8214 constant_expression_error (size
);
8216 /* An array must have a positive number of elements. */
8217 if (INT_CST_LT (size
, integer_zero_node
))
8219 if (!(complain
& tf_error
))
8220 return error_mark_node
;
8222 error ("size of array %qD is negative", name
);
8224 error ("size of array is negative");
8225 size
= integer_one_node
;
8227 /* As an extension we allow zero-sized arrays. */
8228 else if (integer_zerop (size
))
8230 if (!(complain
& tf_error
))
8231 /* We must fail if performing argument deduction (as
8232 indicated by the state of complain), so that
8233 another substitution can be found. */
8234 return error_mark_node
;
8235 else if (in_system_header
)
8236 /* Allow them in system headers because glibc uses them. */;
8238 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8240 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8243 else if (TREE_CONSTANT (size
)
8244 /* We don't allow VLAs at non-function scopes, or during
8245 tentative template substitution. */
8246 || !at_function_scope_p () || !(complain
& tf_error
))
8248 if (!(complain
& tf_error
))
8249 return error_mark_node
;
8250 /* `(int) &fn' is not a valid array bound. */
8252 error ("size of array %qD is not an integral constant-expression",
8255 error ("size of array is not an integral constant-expression");
8256 size
= integer_one_node
;
8258 else if (pedantic
&& warn_vla
!= 0)
8261 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8263 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8265 else if (warn_vla
> 0)
8269 "variable length array %qD is used", name
);
8272 "variable length array is used");
8275 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8276 /* A variable sized array. */
8277 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8280 HOST_WIDE_INT saved_processing_template_decl
;
8282 /* Compute the index of the largest element in the array. It is
8283 one less than the number of elements in the array. We save
8284 and restore PROCESSING_TEMPLATE_DECL so that computations in
8285 cp_build_binary_op will be appropriately folded. */
8286 saved_processing_template_decl
= processing_template_decl
;
8287 processing_template_decl
= 0;
8288 itype
= cp_build_binary_op (input_location
,
8290 cp_convert (ssizetype
, size
, complain
),
8291 cp_convert (ssizetype
, integer_one_node
,
8294 itype
= fold (itype
);
8295 processing_template_decl
= saved_processing_template_decl
;
8297 if (!TREE_CONSTANT (itype
))
8299 /* A variable sized array. */
8300 itype
= variable_size (itype
);
8301 if (TREE_CODE (itype
) != SAVE_EXPR
)
8303 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8304 they might survive till gimplification. */
8305 tree newitype
= itype
;
8307 cp_walk_tree_without_duplicates (&newitype
,
8308 fold_sizeof_expr_r
, &found
);
8310 itype
= variable_size (fold (newitype
));
8313 /* Make sure that there was no overflow when creating to a signed
8314 index type. (For example, on a 32-bit machine, an array with
8315 size 2^32 - 1 is too big.) */
8316 else if (TREE_CODE (itype
) == INTEGER_CST
8317 && TREE_OVERFLOW (itype
))
8319 if (!(complain
& tf_error
))
8320 return error_mark_node
;
8321 error ("overflow in array dimension");
8322 TREE_OVERFLOW (itype
) = 0;
8326 /* Create and return the appropriate index type. */
8327 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8329 tree t
= build_index_type (itype
);
8330 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8331 itype
= abi_1_itype
;
8334 itype
= build_index_type (itype
);
8336 /* If the index type were dependent, we would have returned early, so
8337 remember that it isn't. */
8338 TYPE_DEPENDENT_P (itype
) = 0;
8339 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8343 /* Returns the scope (if any) in which the entity declared by
8344 DECLARATOR will be located. If the entity was declared with an
8345 unqualified name, NULL_TREE is returned. */
8348 get_scope_of_declarator (const cp_declarator
*declarator
)
8350 while (declarator
&& declarator
->kind
!= cdk_id
)
8351 declarator
= declarator
->declarator
;
8353 /* If the declarator-id is a SCOPE_REF, the scope in which the
8354 declaration occurs is the first operand. */
8356 && declarator
->u
.id
.qualifying_scope
)
8357 return declarator
->u
.id
.qualifying_scope
;
8359 /* Otherwise, the declarator is not a qualified name; the entity will
8360 be declared in the current scope. */
8364 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8365 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8369 create_array_type_for_decl (tree name
, tree type
, tree size
)
8371 tree itype
= NULL_TREE
;
8373 /* If things have already gone awry, bail now. */
8374 if (type
== error_mark_node
|| size
== error_mark_node
)
8375 return error_mark_node
;
8377 /* 8.3.4/1: If the type of the identifier of D contains the auto
8378 type-specifier, the program is ill-formed. */
8379 if (pedantic
&& type_uses_auto (type
))
8380 pedwarn (input_location
, OPT_Wpedantic
,
8381 "declaration of %qD as array of %<auto%>", name
);
8383 /* If there are some types which cannot be array elements,
8384 issue an error-message and return. */
8385 switch (TREE_CODE (type
))
8389 error ("declaration of %qD as array of void", name
);
8391 error ("creating array of void");
8392 return error_mark_node
;
8396 error ("declaration of %qD as array of functions", name
);
8398 error ("creating array of functions");
8399 return error_mark_node
;
8401 case REFERENCE_TYPE
:
8403 error ("declaration of %qD as array of references", name
);
8405 error ("creating array of references");
8406 return error_mark_node
;
8410 error ("declaration of %qD as array of function members", name
);
8412 error ("creating array of function members");
8413 return error_mark_node
;
8421 The constant expressions that specify the bounds of the arrays
8422 can be omitted only for the first member of the sequence. */
8423 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8426 error ("declaration of %qD as multidimensional array must "
8427 "have bounds for all dimensions except the first",
8430 error ("multidimensional array must have bounds for all "
8431 "dimensions except the first");
8433 return error_mark_node
;
8436 /* Figure out the index type for the array. */
8438 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8441 T is called the array element type; this type shall not be [...] an
8442 abstract class type. */
8443 abstract_virtuals_error (name
, type
);
8445 return build_cplus_array_type (type
, itype
);
8448 /* Check that it's OK to declare a function with the indicated TYPE.
8449 SFK indicates the kind of special function (if any) that this
8450 function is. OPTYPE is the type given in a conversion operator
8451 declaration, or the class type for a constructor/destructor.
8452 Returns the actual return type of the function; that
8453 may be different than TYPE if an error occurs, or for certain
8454 special functions. */
8457 check_special_function_return_type (special_function_kind sfk
,
8463 case sfk_constructor
:
8465 error ("return type specification for constructor invalid");
8467 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8468 type
= build_pointer_type (optype
);
8470 type
= void_type_node
;
8473 case sfk_destructor
:
8475 error ("return type specification for destructor invalid");
8476 /* We can't use the proper return type here because we run into
8477 problems with ambiguous bases and covariant returns.
8478 Java classes are left unchanged because (void *) isn't a valid
8479 Java type, and we don't want to change the Java ABI. */
8480 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8481 type
= build_pointer_type (void_type_node
);
8483 type
= void_type_node
;
8486 case sfk_conversion
:
8488 error ("return type specified for %<operator %T%>", optype
);
8499 /* A variable or data member (whose unqualified name is IDENTIFIER)
8500 has been declared with the indicated TYPE. If the TYPE is not
8501 acceptable, issue an error message and return a type to use for
8502 error-recovery purposes. */
8505 check_var_type (tree identifier
, tree type
)
8507 if (VOID_TYPE_P (type
))
8510 error ("unnamed variable or field declared void");
8511 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8513 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8514 error ("variable or field %qE declared void", identifier
);
8517 error ("variable or field declared void");
8518 type
= error_mark_node
;
8524 /* Given declspecs and a declarator (abstract or otherwise), determine
8525 the name and type of the object declared and construct a DECL node
8528 DECLSPECS points to the representation of declaration-specifier
8529 sequence that precedes declarator.
8531 DECL_CONTEXT says which syntactic context this declaration is in:
8532 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8533 FUNCDEF for a function definition. Like NORMAL but a few different
8534 error messages in each case. Return value may be zero meaning
8535 this definition is too screwy to try to parse.
8536 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8537 handle member functions (which have FIELD context).
8538 Return value may be zero meaning this definition is too screwy to
8540 PARM for a parameter declaration (either within a function prototype
8541 or before a function body). Make a PARM_DECL, or return void_type_node.
8542 TPARM for a template parameter declaration.
8543 CATCHPARM for a parameter declaration before a catch clause.
8544 TYPENAME if for a typename (in a cast or sizeof).
8545 Don't make a DECL node; just return the ..._TYPE node.
8546 FIELD for a struct or union field; make a FIELD_DECL.
8547 BITFIELD for a field with specified width.
8549 INITIALIZED is as for start_decl.
8551 ATTRLIST is a pointer to the list of attributes, which may be NULL
8552 if there are none; *ATTRLIST may be modified if attributes from inside
8553 the declarator should be applied to the declaration.
8555 When this function is called, scoping variables (such as
8556 CURRENT_CLASS_TYPE) should reflect the scope in which the
8557 declaration occurs, not the scope in which the new declaration will
8558 be placed. For example, on:
8562 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8565 Returns a DECL (if a declarator is present), a TYPE (if there is no
8566 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8570 grokdeclarator (const cp_declarator
*declarator
,
8571 cp_decl_specifier_seq
*declspecs
,
8572 enum decl_context decl_context
,
8576 tree type
= NULL_TREE
;
8578 int explicit_int128
= 0;
8579 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8580 int explicit_int
= 0;
8581 int explicit_char
= 0;
8582 int defaulted_int
= 0;
8583 tree dependent_name
= NULL_TREE
;
8585 tree typedef_decl
= NULL_TREE
;
8586 const char *name
= NULL
;
8587 tree typedef_type
= NULL_TREE
;
8588 /* True if this declarator is a function definition. */
8589 bool funcdef_flag
= false;
8590 cp_declarator_kind innermost_code
= cdk_error
;
8593 /* See the code below that used this. */
8594 tree decl_attr
= NULL_TREE
;
8597 /* Keep track of what sort of function is being processed
8598 so that we can warn about default return values, or explicit
8599 return values which do not match prescribed defaults. */
8600 special_function_kind sfk
= sfk_none
;
8602 tree dname
= NULL_TREE
;
8603 tree ctor_return_type
= NULL_TREE
;
8604 enum overload_flags flags
= NO_SPECIAL
;
8605 /* cv-qualifiers that apply to the declarator, for a declaration of
8606 a member function. */
8607 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8608 /* virt-specifiers that apply to the declarator, for a declaration of
8609 a member function. */
8610 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8611 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8613 tree raises
= NULL_TREE
;
8614 int template_count
= 0;
8615 tree returned_attrs
= NULL_TREE
;
8616 tree parms
= NULL_TREE
;
8617 const cp_declarator
*id_declarator
;
8618 /* The unqualified name of the declarator; either an
8619 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8620 tree unqualified_id
;
8621 /* The class type, if any, in which this entity is located,
8622 or NULL_TREE if none. Note that this value may be different from
8623 the current class type; for example if an attempt is made to declare
8624 "A::f" inside "B", this value will be "A". */
8625 tree ctype
= current_class_type
;
8626 /* The NAMESPACE_DECL for the namespace in which this entity is
8627 located. If an unqualified name is used to declare the entity,
8628 this value will be NULL_TREE, even if the entity is located at
8630 tree in_namespace
= NULL_TREE
;
8631 cp_storage_class storage_class
;
8632 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8633 bool type_was_error_mark_node
= false;
8634 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8635 bool template_type_arg
= false;
8636 bool template_parm_flag
= false;
8637 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8640 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8641 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8642 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8643 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8644 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8645 explicit_int128
= declspecs
->explicit_int128_p
;
8646 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8648 if (decl_context
== FUNCDEF
)
8649 funcdef_flag
= true, decl_context
= NORMAL
;
8650 else if (decl_context
== MEMFUNCDEF
)
8651 funcdef_flag
= true, decl_context
= FIELD
;
8652 else if (decl_context
== BITFIELD
)
8653 bitfield
= 1, decl_context
= FIELD
;
8654 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8655 template_type_arg
= true, decl_context
= TYPENAME
;
8656 else if (decl_context
== TPARM
)
8657 template_parm_flag
= true, decl_context
= PARM
;
8659 if (initialized
> 1)
8660 funcdef_flag
= true;
8662 /* Look inside a declarator for the name being declared
8663 and get it as a string, for an error message. */
8664 for (id_declarator
= declarator
;
8666 id_declarator
= id_declarator
->declarator
)
8668 if (id_declarator
->kind
!= cdk_id
)
8669 innermost_code
= id_declarator
->kind
;
8671 switch (id_declarator
->kind
)
8674 if (id_declarator
->declarator
8675 && id_declarator
->declarator
->kind
== cdk_id
)
8677 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8678 if (sfk
== sfk_destructor
)
8685 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8686 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8689 if (qualifying_scope
)
8691 if (at_function_scope_p ())
8695 A declarator-id shall not be qualified except
8698 None of the cases are permitted in block
8700 if (qualifying_scope
== global_namespace
)
8701 error ("invalid use of qualified-name %<::%D%>",
8703 else if (TYPE_P (qualifying_scope
))
8704 error ("invalid use of qualified-name %<%T::%D%>",
8705 qualifying_scope
, decl
);
8707 error ("invalid use of qualified-name %<%D::%D%>",
8708 qualifying_scope
, decl
);
8709 return error_mark_node
;
8711 else if (TYPE_P (qualifying_scope
))
8713 ctype
= qualifying_scope
;
8714 if (!MAYBE_CLASS_TYPE_P (ctype
))
8716 error ("%q#T is not a class or a namespace", ctype
);
8719 else if (innermost_code
!= cdk_function
8720 && current_class_type
8721 && !uniquely_derived_from_p (ctype
,
8722 current_class_type
))
8724 error ("type %qT is not derived from type %qT",
8725 ctype
, current_class_type
);
8726 return error_mark_node
;
8729 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8730 in_namespace
= qualifying_scope
;
8732 switch (TREE_CODE (decl
))
8738 if (innermost_code
!= cdk_function
)
8740 error ("declaration of %qD as non-function", decl
);
8741 return error_mark_node
;
8743 else if (!qualifying_scope
8744 && !(current_class_type
&& at_class_scope_p ()))
8746 error ("declaration of %qD as non-member", decl
);
8747 return error_mark_node
;
8750 type
= TREE_OPERAND (decl
, 0);
8752 type
= constructor_name (type
);
8753 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8758 case TEMPLATE_ID_EXPR
:
8760 tree fns
= TREE_OPERAND (decl
, 0);
8763 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8765 gcc_assert (is_overloaded_fn (dname
));
8766 dname
= DECL_NAME (get_first_fn (dname
));
8771 case IDENTIFIER_NODE
:
8772 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8775 if (C_IS_RESERVED_WORD (dname
))
8777 error ("declarator-id missing; using reserved word %qD",
8779 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8781 else if (!IDENTIFIER_TYPENAME_P (dname
))
8782 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8785 gcc_assert (flags
== NO_SPECIAL
);
8786 flags
= TYPENAME_FLAG
;
8787 ctor_return_type
= TREE_TYPE (dname
);
8788 sfk
= sfk_conversion
;
8789 if (is_typename_at_global_scope (dname
))
8790 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8792 name
= "<invalid operator>";
8809 return error_mark_node
;
8814 if (id_declarator
->kind
== cdk_id
)
8820 The declarator in a function-definition shall have the form
8821 D1 ( parameter-declaration-clause) ... */
8822 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8824 error ("function definition does not declare parameters");
8825 return error_mark_node
;
8828 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8829 && innermost_code
!= cdk_function
8830 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8832 error ("declaration of %qD as non-function", dname
);
8833 return error_mark_node
;
8837 && TREE_CODE (dname
) == IDENTIFIER_NODE
8838 && UDLIT_OPER_P (dname
)
8839 && innermost_code
!= cdk_function
)
8841 error ("declaration of %qD as non-function", dname
);
8842 return error_mark_node
;
8845 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8847 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
8849 error ("declaration of %qD as %<typedef%>", dname
);
8850 return error_mark_node
;
8852 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8854 error ("declaration of %qD as parameter", dname
);
8855 return error_mark_node
;
8859 /* Anything declared one level down from the top level
8860 must be one of the parameters of a function
8861 (because the body is at least two levels down). */
8863 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8864 by not allowing C++ class definitions to specify their parameters
8865 with xdecls (must be spec.d in the parmlist).
8867 Since we now wait to push a class scope until we are sure that
8868 we are in a legitimate method context, we must set oldcname
8869 explicitly (since current_class_name is not yet alive).
8871 We also want to avoid calling this a PARM if it is in a namespace. */
8873 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8875 cp_binding_level
*b
= current_binding_level
;
8876 current_binding_level
= b
->level_chain
;
8877 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8878 decl_context
= PARM
;
8879 current_binding_level
= b
;
8883 name
= decl_context
== PARM
? "parameter" : "type name";
8885 if (constexpr_p
&& decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
8887 error ("%<constexpr%> cannot appear in a typedef declaration");
8888 return error_mark_node
;
8891 /* If there were multiple types specified in the decl-specifier-seq,
8892 issue an error message. */
8893 if (declspecs
->multiple_types_p
)
8895 error ("two or more data types in declaration of %qs", name
);
8896 return error_mark_node
;
8899 if (declspecs
->conflicting_specifiers_p
)
8901 error ("conflicting specifiers in declaration of %qs", name
);
8902 return error_mark_node
;
8905 /* Extract the basic type from the decl-specifier-seq. */
8906 type
= declspecs
->type
;
8907 if (type
== error_mark_node
)
8910 type_was_error_mark_node
= true;
8912 /* If the entire declaration is itself tagged as deprecated then
8913 suppress reports of deprecated items. */
8914 if (type
&& TREE_DEPRECATED (type
)
8915 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8916 warn_deprecated_use (type
, NULL_TREE
);
8917 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8919 typedef_decl
= type
;
8920 type
= TREE_TYPE (typedef_decl
);
8921 if (TREE_DEPRECATED (type
)
8922 && DECL_ARTIFICIAL (typedef_decl
)
8923 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8924 warn_deprecated_use (type
, NULL_TREE
);
8926 /* No type at all: default to `int', and set DEFAULTED_INT
8927 because it was not a user-defined typedef. */
8928 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8930 /* These imply 'int'. */
8931 type
= integer_type_node
;
8935 explicit_int
= declspecs
->explicit_int_p
;
8936 explicit_char
= declspecs
->explicit_char_p
;
8939 /* See the code below that used this. */
8941 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8943 typedef_type
= type
;
8946 if (sfk
!= sfk_conversion
)
8947 ctor_return_type
= ctype
;
8949 if (sfk
!= sfk_none
)
8950 type
= check_special_function_return_type (sfk
, type
,
8952 else if (type
== NULL_TREE
)
8958 /* We handle `main' specially here, because 'main () { }' is so
8959 common. With no options, it is allowed. With -Wreturn-type,
8960 it is a warning. It is only an error with -pedantic-errors. */
8961 is_main
= (funcdef_flag
8962 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8963 && MAIN_NAME_P (dname
)
8964 && ctype
== NULL_TREE
8965 && in_namespace
== NULL_TREE
8966 && current_namespace
== global_namespace
);
8968 if (type_was_error_mark_node
)
8969 /* We've already issued an error, don't complain more. */;
8970 else if (in_system_header
|| flag_ms_extensions
)
8971 /* Allow it, sigh. */;
8973 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8975 pedwarn (input_location
, OPT_Wpedantic
,
8976 "ISO C++ forbids declaration of %qs with no type", name
);
8978 warning (OPT_Wreturn_type
,
8979 "ISO C++ forbids declaration of %qs with no type", name
);
8981 type
= integer_type_node
;
8986 if (explicit_int128
)
8988 if (int128_integer_type_node
== NULL_TREE
)
8990 error ("%<__int128%> is not supported by this target");
8991 explicit_int128
= false;
8993 else if (pedantic
&& ! in_system_header
)
8994 pedwarn (input_location
, OPT_Wpedantic
,
8995 "ISO C++ does not support %<__int128%> for %qs", name
);
8998 /* Now process the modifiers that were specified
8999 and check for invalid combinations. */
9001 /* Long double is a special combination. */
9002 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9005 type
= cp_build_qualified_type (long_double_type_node
,
9006 cp_type_quals (type
));
9009 /* Check all other uses of type modifiers. */
9011 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9015 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9016 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9017 else if (signed_p
&& unsigned_p
)
9018 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9019 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9020 error ("%<long long%> invalid for %qs", name
);
9021 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9022 error ("%<long%> invalid for %qs", name
);
9023 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9024 error ("%<short%> invalid for %qs", name
);
9025 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9026 error ("%<long%> or %<short%> invalid for %qs", name
);
9027 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9028 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9029 else if ((long_p
|| short_p
) && explicit_char
)
9030 error ("%<long%> or %<short%> specified with char for %qs", name
);
9031 else if (long_p
&& short_p
)
9032 error ("%<long%> and %<short%> specified together for %qs", name
);
9033 else if (type
== char16_type_node
|| type
== char32_type_node
)
9035 if (signed_p
|| unsigned_p
)
9036 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9037 else if (short_p
|| long_p
)
9038 error ("%<short%> or %<long%> invalid for %qs", name
);
9043 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9045 pedwarn (input_location
, OPT_Wpedantic
,
9046 "long, short, signed or unsigned used invalidly for %qs",
9048 if (flag_pedantic_errors
)
9053 /* Discard the type modifiers if they are invalid. */
9064 /* Decide whether an integer type is signed or not.
9065 Optionally treat bitfields as signed by default. */
9069 It is implementation-defined whether a plain (neither
9070 explicitly signed or unsigned) char, short, int, or long
9071 bit-field is signed or unsigned.
9073 Naturally, we extend this to long long as well. Note that
9074 this does not include wchar_t. */
9075 || (bitfield
&& !flag_signed_bitfields
9077 /* A typedef for plain `int' without `signed' can be
9078 controlled just like plain `int', but a typedef for
9079 `signed int' cannot be so controlled. */
9081 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9082 && TREE_CODE (type
) == INTEGER_TYPE
9083 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9085 if (explicit_int128
)
9086 type
= int128_unsigned_type_node
;
9088 type
= long_long_unsigned_type_node
;
9090 type
= long_unsigned_type_node
;
9092 type
= short_unsigned_type_node
;
9093 else if (type
== char_type_node
)
9094 type
= unsigned_char_type_node
;
9095 else if (typedef_decl
)
9096 type
= unsigned_type_for (type
);
9098 type
= unsigned_type_node
;
9100 else if (signed_p
&& type
== char_type_node
)
9101 type
= signed_char_type_node
;
9102 else if (explicit_int128
)
9103 type
= int128_integer_type_node
;
9105 type
= long_long_integer_type_node
;
9107 type
= long_integer_type_node
;
9109 type
= short_integer_type_node
;
9111 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9113 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9114 error ("complex invalid for %qs", name
);
9115 /* If we just have "complex", it is equivalent to
9116 "complex double", but if any modifiers at all are specified it is
9117 the complex form of TYPE. E.g, "complex short" is
9118 "complex short int". */
9119 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9120 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9121 type
= complex_double_type_node
;
9122 else if (type
== integer_type_node
)
9123 type
= complex_integer_type_node
;
9124 else if (type
== float_type_node
)
9125 type
= complex_float_type_node
;
9126 else if (type
== double_type_node
)
9127 type
= complex_double_type_node
;
9128 else if (type
== long_double_type_node
)
9129 type
= complex_long_double_type_node
;
9131 type
= build_complex_type (type
);
9134 type_quals
= TYPE_UNQUALIFIED
;
9135 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9136 type_quals
|= TYPE_QUAL_CONST
;
9137 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9138 type_quals
|= TYPE_QUAL_VOLATILE
;
9139 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9140 type_quals
|= TYPE_QUAL_RESTRICT
;
9141 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9142 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9145 /* If we're using the injected-class-name to form a compound type or a
9146 declaration, replace it with the underlying class so we don't get
9147 redundant typedefs in the debug output. But if we are returning the
9148 type unchanged, leave it alone so that it's available to
9149 maybe_get_template_decl_from_type_decl. */
9150 if (CLASS_TYPE_P (type
)
9151 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9152 && type
== TREE_TYPE (TYPE_NAME (type
))
9153 && (declarator
|| type_quals
))
9154 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9156 type_quals
|= cp_type_quals (type
);
9157 type
= cp_build_qualified_type_real
9158 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9159 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9160 /* We might have ignored or rejected some of the qualifiers. */
9161 type_quals
= cp_type_quals (type
);
9164 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9165 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9166 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9168 storage_class
= declspecs
->storage_class
;
9169 if (storage_class
== sc_static
)
9170 staticp
= 1 + (decl_context
== FIELD
);
9172 if (virtualp
&& staticp
== 2)
9174 error ("member %qD cannot be declared both virtual and static", dname
);
9175 storage_class
= sc_none
;
9178 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9180 if (dependent_name
&& !friendp
)
9182 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
9183 return error_mark_node
;
9186 /* Issue errors about use of storage classes for parameters. */
9187 if (decl_context
== PARM
)
9189 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9191 error ("typedef declaration invalid in parameter declaration");
9192 return error_mark_node
;
9194 else if (template_parm_flag
&& storage_class
!= sc_none
)
9196 error ("storage class specified for template parameter %qs", name
);
9197 return error_mark_node
;
9199 else if (storage_class
== sc_static
9200 || storage_class
== sc_extern
9202 error ("storage class specifiers invalid in parameter declarations");
9204 /* Function parameters cannot be constexpr. If we saw one, moan
9205 and pretend it wasn't there. */
9208 error ("a parameter cannot be declared %<constexpr%>");
9213 /* Give error if `virtual' is used outside of class declaration. */
9215 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9217 error ("%<virtual%> outside class declaration");
9221 /* Static anonymous unions are dealt with here. */
9222 if (staticp
&& decl_context
== TYPENAME
9224 && ANON_AGGR_TYPE_P (declspecs
->type
))
9225 decl_context
= FIELD
;
9227 /* Warn about storage classes that are invalid for certain
9228 kinds of declarations (parameters, typenames, etc.). */
9231 && storage_class
!= sc_extern
9232 && storage_class
!= sc_static
)
9233 || decl_spec_seq_has_spec_p (declspecs
, ds_typedef
)))
9235 error ("multiple storage classes in declaration of %qs", name
);
9238 if (decl_context
!= NORMAL
9239 && ((storage_class
!= sc_none
9240 && storage_class
!= sc_mutable
)
9243 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9244 && (storage_class
== sc_register
9245 || storage_class
== sc_auto
))
9247 else if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9249 else if (decl_context
== FIELD
9250 /* C++ allows static class elements. */
9251 && storage_class
== sc_static
)
9252 /* C++ also allows inlines and signed and unsigned elements,
9253 but in those cases we don't come in here. */
9257 if (decl_context
== FIELD
)
9258 error ("storage class specified for %qs", name
);
9261 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9262 error ("storage class specified for parameter %qs", name
);
9264 error ("storage class specified for typename");
9266 if (storage_class
== sc_register
9267 || storage_class
== sc_auto
9268 || storage_class
== sc_extern
9270 storage_class
= sc_none
;
9273 else if (storage_class
== sc_extern
&& funcdef_flag
9274 && ! toplevel_bindings_p ())
9275 error ("nested function %qs declared %<extern%>", name
);
9276 else if (toplevel_bindings_p ())
9278 if (storage_class
== sc_auto
)
9279 error ("top-level declaration of %qs specifies %<auto%>", name
);
9282 && storage_class
!= sc_extern
9283 && storage_class
!= sc_static
)
9285 if (declspecs
->gnu_thread_keyword_p
)
9286 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9287 "declared %<__thread%>", name
);
9289 /* When thread_local is applied to a variable of block scope the
9290 storage-class-specifier static is implied if it does not appear
9292 storage_class
= declspecs
->storage_class
= sc_static
;
9296 if (storage_class
&& friendp
)
9298 error ("storage class specifiers invalid in friend function declarations");
9299 storage_class
= sc_none
;
9304 unqualified_id
= NULL_TREE
;
9307 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9308 switch (TREE_CODE (unqualified_id
))
9311 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9312 if (TYPE_P (unqualified_id
))
9313 unqualified_id
= constructor_name (unqualified_id
);
9316 case IDENTIFIER_NODE
:
9317 case TEMPLATE_ID_EXPR
:
9325 if (declspecs
->std_attributes
)
9327 /* Apply the c++11 attributes to the type preceding them. */
9328 source_location saved_loc
= input_location
;
9329 input_location
= declspecs
->locations
[ds_std_attribute
];
9330 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9331 input_location
= saved_loc
;
9334 /* Determine the type of the entity declared by recurring on the
9336 for (; declarator
; declarator
= declarator
->declarator
)
9338 const cp_declarator
*inner_declarator
;
9341 if (type
== error_mark_node
)
9342 return error_mark_node
;
9344 attrs
= declarator
->attributes
;
9350 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9351 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9352 if (declarator
->kind
== cdk_function
)
9353 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9354 if (declarator
->kind
== cdk_array
)
9355 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9356 returned_attrs
= decl_attributes (&type
,
9357 chainon (returned_attrs
, attrs
),
9361 if (declarator
->kind
== cdk_id
)
9364 inner_declarator
= declarator
->declarator
;
9366 switch (declarator
->kind
)
9369 type
= create_array_type_for_decl (dname
, type
,
9370 declarator
->u
.array
.bounds
);
9371 if (declarator
->std_attributes
)
9374 The optional attribute-specifier-seq appertains to the
9376 returned_attrs
= chainon (returned_attrs
,
9377 declarator
->std_attributes
);
9385 /* Declaring a function type.
9386 Make sure we have a valid type for the function to return. */
9388 if (type_quals
!= TYPE_UNQUALIFIED
)
9390 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9391 warning (OPT_Wignored_qualifiers
,
9392 "type qualifiers ignored on function return type");
9393 /* We now know that the TYPE_QUALS don't apply to the
9394 decl, but to its return type. */
9395 type_quals
= TYPE_UNQUALIFIED
;
9397 errmsg
= targetm
.invalid_return_type (type
);
9401 type
= integer_type_node
;
9404 /* Error about some types functions can't return. */
9406 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9408 error ("%qs declared as function returning a function", name
);
9409 return error_mark_node
;
9411 if (TREE_CODE (type
) == ARRAY_TYPE
)
9413 error ("%qs declared as function returning an array", name
);
9414 return error_mark_node
;
9416 /* When decl_context == NORMAL we emit a better error message
9417 later in abstract_virtuals_error. */
9418 if (decl_context
== TYPENAME
&& ABSTRACT_CLASS_TYPE_P (type
))
9419 error ("%qs declared as function returning an abstract "
9420 "class type", name
);
9422 /* Pick up type qualifiers which should be applied to `this'. */
9423 memfn_quals
= declarator
->u
.function
.qualifiers
;
9424 /* Pick up virt-specifiers. */
9425 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9426 /* Pick up the exception specifications. */
9427 raises
= declarator
->u
.function
.exception_specification
;
9428 /* If the exception-specification is ill-formed, let's pretend
9429 there wasn't one. */
9430 if (raises
== error_mark_node
)
9433 /* Say it's a definition only for the CALL_EXPR
9434 closest to the identifier. */
9435 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9437 /* Handle a late-specified return type. */
9440 if (type_uses_auto (type
))
9442 if (!declarator
->u
.function
.late_return_type
)
9444 if (current_class_type
9445 && LAMBDA_TYPE_P (current_class_type
))
9446 /* OK for C++11 lambdas. */;
9447 else if (cxx_dialect
< cxx1y
)
9448 pedwarn (input_location
, 0, "%qs function uses "
9449 "%<auto%> type specifier without trailing "
9450 "return type", name
);
9452 else if (!is_auto (type
))
9454 error ("%qs function with trailing return type has"
9455 " %qT as its type rather than plain %<auto%>",
9457 return error_mark_node
;
9460 else if (declarator
->u
.function
.late_return_type
)
9462 if (cxx_dialect
< cxx0x
)
9463 /* Not using maybe_warn_cpp0x because this should
9464 always be an error. */
9465 error ("trailing return type only available with "
9466 "-std=c++11 or -std=gnu++11");
9468 error ("%qs function with trailing return type not "
9469 "declared with %<auto%> type specifier", name
);
9470 return error_mark_node
;
9473 type
= splice_late_return_type
9474 (type
, declarator
->u
.function
.late_return_type
);
9475 if (type
== error_mark_node
)
9476 return error_mark_node
;
9478 if (ctype
== NULL_TREE
9479 && decl_context
== FIELD
9481 && (friendp
== 0 || dname
== current_class_name
))
9482 ctype
= current_class_type
;
9484 if (ctype
&& (sfk
== sfk_constructor
9485 || sfk
== sfk_destructor
))
9487 /* We are within a class's scope. If our declarator name
9488 is the same as the class name, and we are defining
9489 a function, then it is a constructor/destructor, and
9490 therefore returns a void type. */
9492 /* ISO C++ 12.4/2. A destructor may not be declared
9493 const or volatile. A destructor may not be
9496 ISO C++ 12.1. A constructor may not be declared
9497 const or volatile. A constructor may not be
9498 virtual. A constructor may not be static. */
9500 error ((flags
== DTOR_FLAG
)
9501 ? G_("destructor cannot be static member function")
9502 : G_("constructor cannot be static member function"));
9505 error ((flags
== DTOR_FLAG
)
9506 ? G_("destructors may not be cv-qualified")
9507 : G_("constructors may not be cv-qualified"));
9508 memfn_quals
= TYPE_UNQUALIFIED
;
9511 if (decl_context
== FIELD
9512 && !member_function_or_else (ctype
,
9515 return error_mark_node
;
9517 if (flags
!= DTOR_FLAG
)
9519 /* It's a constructor. */
9524 permerror (input_location
, "constructors cannot be declared virtual");
9527 if (decl_context
== FIELD
9528 && sfk
!= sfk_constructor
)
9529 return error_mark_node
;
9531 if (decl_context
== FIELD
)
9537 error ("can%'t initialize friend function %qs", name
);
9540 /* Cannot be both friend and virtual. */
9541 error ("virtual functions cannot be friends");
9544 if (decl_context
== NORMAL
)
9545 error ("friend declaration not in class definition");
9546 if (current_function_decl
&& funcdef_flag
)
9547 error ("can%'t define friend function %qs in a local "
9551 else if (ctype
&& sfk
== sfk_conversion
)
9555 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9560 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9563 if (inner_declarator
9564 && inner_declarator
->kind
== cdk_id
9565 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9566 && arg_types
!= void_list_node
)
9568 error ("destructors may not have parameters");
9569 arg_types
= void_list_node
;
9573 type
= build_function_type (type
, arg_types
);
9574 if (declarator
->std_attributes
)
9577 The optional attribute-specifier-seq appertains to
9578 the function type. */
9579 decl_attributes (&type
, declarator
->std_attributes
,
9587 /* Filter out pointers-to-references and references-to-references.
9588 We can get these if a TYPE_DECL is used. */
9590 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9592 if (declarator
->kind
!= cdk_reference
)
9594 error ("cannot declare pointer to %q#T", type
);
9595 type
= TREE_TYPE (type
);
9598 /* In C++0x, we allow reference to reference declarations
9599 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9600 and template type arguments [14.3.1/4 temp.arg.type]. The
9601 check for direct reference to reference declarations, which
9602 are still forbidden, occurs below. Reasoning behind the change
9603 can be found in DR106, DR540, and the rvalue reference
9605 else if (cxx_dialect
== cxx98
)
9607 error ("cannot declare reference to %q#T", type
);
9608 type
= TREE_TYPE (type
);
9611 else if (VOID_TYPE_P (type
))
9613 if (declarator
->kind
== cdk_reference
)
9614 error ("cannot declare reference to %q#T", type
);
9615 else if (declarator
->kind
== cdk_ptrmem
)
9616 error ("cannot declare pointer to %q#T member", type
);
9619 /* We now know that the TYPE_QUALS don't apply to the decl,
9620 but to the target of the pointer. */
9621 type_quals
= TYPE_UNQUALIFIED
;
9623 if (declarator
->kind
== cdk_ptrmem
9624 && (TREE_CODE (type
) == FUNCTION_TYPE
9625 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9627 memfn_quals
|= type_memfn_quals (type
);
9628 type
= build_memfn_type (type
,
9629 declarator
->u
.pointer
.class_type
,
9631 if (type
== error_mark_node
)
9632 return error_mark_node
;
9633 memfn_quals
= TYPE_UNQUALIFIED
;
9636 if (TREE_CODE (type
) == FUNCTION_TYPE
9637 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9638 error (declarator
->kind
== cdk_reference
9639 ? G_("cannot declare reference to qualified function type %qT")
9640 : G_("cannot declare pointer to qualified function type %qT"),
9643 /* When the pointed-to type involves components of variable size,
9644 care must be taken to ensure that the size evaluation code is
9645 emitted early enough to dominate all the possible later uses
9646 and late enough for the variables on which it depends to have
9649 This is expected to happen automatically when the pointed-to
9650 type has a name/declaration of it's own, but special attention
9651 is required if the type is anonymous.
9653 We handle the NORMAL and FIELD contexts here by inserting a
9654 dummy statement that just evaluates the size at a safe point
9655 and ensures it is not deferred until e.g. within a deeper
9656 conditional context (c++/43555).
9658 We expect nothing to be needed here for PARM or TYPENAME.
9659 Evaluating the size at this point for TYPENAME would
9660 actually be incorrect, as we might be in the middle of an
9661 expression with side effects on the pointed-to type size
9662 "arguments" prior to the pointer declaration point and the
9663 size evaluation could end up prior to the side effects. */
9665 if (!TYPE_NAME (type
)
9666 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9667 && at_function_scope_p ()
9668 && variably_modified_type_p (type
, NULL_TREE
))
9670 /* First break out any side-effects. */
9671 stabilize_vla_size (TYPE_SIZE (type
));
9672 /* And then force evaluation of the SAVE_EXPR. */
9673 finish_expr_stmt (TYPE_SIZE (type
));
9676 if (declarator
->kind
== cdk_reference
)
9678 /* In C++0x, the type we are creating a reference to might be
9679 a typedef which is itself a reference type. In that case,
9680 we follow the reference collapsing rules in
9681 [7.1.3/8 dcl.typedef] to create the final reference type:
9683 "If a typedef TD names a type that is a reference to a type
9684 T, an attempt to create the type 'lvalue reference to cv TD'
9685 creates the type 'lvalue reference to T,' while an attempt
9686 to create the type "rvalue reference to cv TD' creates the
9689 if (VOID_TYPE_P (type
))
9690 /* We already gave an error. */;
9691 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9693 if (declarator
->u
.reference
.rvalue_ref
)
9694 /* Leave type alone. */;
9696 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9699 type
= cp_build_reference_type
9700 (type
, declarator
->u
.reference
.rvalue_ref
);
9702 /* In C++0x, we need this check for direct reference to
9703 reference declarations, which are forbidden by
9704 [8.3.2/5 dcl.ref]. Reference to reference declarations
9705 are only allowed indirectly through typedefs and template
9706 type arguments. Example:
9708 void foo(int & &); // invalid ref-to-ref decl
9710 typedef int & int_ref;
9711 void foo(int_ref &); // valid ref-to-ref decl
9713 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9714 error ("cannot declare reference to %q#T, which is not "
9715 "a typedef or a template type argument", type
);
9717 else if (TREE_CODE (type
) == METHOD_TYPE
)
9718 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9719 else if (declarator
->kind
== cdk_ptrmem
)
9721 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9723 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9724 /* We will already have complained. */
9725 type
= error_mark_node
;
9727 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9731 type
= build_pointer_type (type
);
9733 /* Process a list of type modifier keywords (such as
9734 const or volatile) that were given inside the `*' or `&'. */
9736 if (declarator
->u
.pointer
.qualifiers
)
9739 = cp_build_qualified_type (type
,
9740 declarator
->u
.pointer
.qualifiers
);
9741 type_quals
= cp_type_quals (type
);
9744 /* Apply C++11 attributes to the pointer, and not to the
9745 type pointed to. This is unlike what is done for GNU
9746 attributes above. It is to comply with [dcl.ptr]/1:
9748 [the optional attribute-specifier-seq (7.6.1) appertains
9749 to the pointer and not to the object pointed to]. */
9750 if (declarator
->std_attributes
)
9751 decl_attributes (&type
, declarator
->std_attributes
,
9765 /* We need to stabilize side-effects in VLA sizes for regular array
9766 declarations too, not just pointers to arrays. */
9767 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9768 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9769 && at_function_scope_p ()
9770 && variably_modified_type_p (type
, NULL_TREE
))
9771 stabilize_vla_size (TYPE_SIZE (type
));
9773 /* A `constexpr' specifier used in an object declaration declares
9774 the object as `const'. */
9775 if (constexpr_p
&& innermost_code
!= cdk_function
)
9777 if (type_quals
& TYPE_QUAL_VOLATILE
)
9778 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9779 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9781 type_quals
|= TYPE_QUAL_CONST
;
9782 type
= cp_build_qualified_type (type
, type_quals
);
9786 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9787 && TREE_CODE (type
) != FUNCTION_TYPE
9788 && TREE_CODE (type
) != METHOD_TYPE
)
9790 error ("template-id %qD used as a declarator",
9792 unqualified_id
= dname
;
9795 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9796 qualified with a class-name, turn it into a METHOD_TYPE, unless
9797 we know that the function is static. We take advantage of this
9798 opportunity to do other processing that pertains to entities
9799 explicitly declared to be class members. Note that if DECLARATOR
9800 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9801 would not have exited the loop above. */
9803 && declarator
->u
.id
.qualifying_scope
9804 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9806 ctype
= declarator
->u
.id
.qualifying_scope
;
9807 ctype
= TYPE_MAIN_VARIANT (ctype
);
9808 template_count
= num_template_headers_for_class (ctype
);
9810 if (ctype
== current_class_type
)
9814 permerror (input_location
, "member functions are implicitly friends of their class");
9818 permerror (declarator
->id_loc
,
9819 "extra qualification %<%T::%> on member %qs",
9822 else if (/* If the qualifying type is already complete, then we
9823 can skip the following checks. */
9824 !COMPLETE_TYPE_P (ctype
)
9825 && (/* If the function is being defined, then
9826 qualifying type must certainly be complete. */
9828 /* A friend declaration of "T::f" is OK, even if
9829 "T" is a template parameter. But, if this
9830 function is not a friend, the qualifying type
9832 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9833 /* For a declaration, the type need not be
9834 complete, if either it is dependent (since there
9835 is no meaningful definition of complete in that
9836 case) or the qualifying class is currently being
9838 || !(dependent_type_p (ctype
)
9839 || currently_open_class (ctype
)))
9840 /* Check that the qualifying type is complete. */
9841 && !complete_type_or_else (ctype
, NULL_TREE
))
9842 return error_mark_node
;
9843 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9845 if (current_class_type
9846 && (!friendp
|| funcdef_flag
))
9849 ? G_("cannot define member function %<%T::%s%> "
9851 : G_("cannot declare member function %<%T::%s%> "
9853 ctype
, name
, current_class_type
);
9854 return error_mark_node
;
9857 else if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
)
9858 && current_class_type
)
9860 error ("cannot declare member %<%T::%s%> within %qT",
9861 ctype
, name
, current_class_type
);
9862 return error_mark_node
;
9866 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9867 ctype
= current_class_type
;
9869 /* Now TYPE has the actual type. */
9874 *attrlist
= chainon (returned_attrs
, *attrlist
);
9876 attrlist
= &returned_attrs
;
9880 && declarator
->kind
== cdk_id
9881 && declarator
->std_attributes
)
9882 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
9883 a declarator-id appertains to the entity that is declared. */
9884 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
9886 /* Handle parameter packs. */
9887 if (parameter_pack_p
)
9889 if (decl_context
== PARM
)
9890 /* Turn the type into a pack expansion.*/
9891 type
= make_pack_expansion (type
);
9893 error ("non-parameter %qs cannot be a parameter pack", name
);
9896 /* Did array size calculations overflow or does the array cover more
9897 than half of the address-space? */
9898 if (TREE_CODE (type
) == ARRAY_TYPE
9899 && COMPLETE_TYPE_P (type
)
9900 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9901 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
9903 error ("size of array %qs is too large", name
);
9904 /* If we proceed with the array type as it is, we'll eventually
9905 crash in tree_low_cst(). */
9906 type
= error_mark_node
;
9909 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9910 && !processing_template_decl
9911 && variably_modified_type_p (type
, NULL_TREE
))
9913 if (decl_context
== FIELD
)
9914 error ("data member may not have variably modified type %qT", type
);
9916 error ("parameter may not have variably modified type %qT", type
);
9917 type
= error_mark_node
;
9920 if (explicitp
== 1 || (explicitp
&& friendp
))
9922 /* [dcl.fct.spec] The explicit specifier shall only be used in
9923 declarations of constructors within a class definition. */
9924 error ("only declarations of constructors can be %<explicit%>");
9928 if (storage_class
== sc_mutable
)
9930 if (decl_context
!= FIELD
|| friendp
)
9932 error ("non-member %qs cannot be declared %<mutable%>", name
);
9933 storage_class
= sc_none
;
9935 else if (decl_context
== TYPENAME
9936 || decl_spec_seq_has_spec_p (declspecs
, ds_typedef
))
9938 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9939 storage_class
= sc_none
;
9941 else if (TREE_CODE (type
) == FUNCTION_TYPE
9942 || TREE_CODE (type
) == METHOD_TYPE
)
9944 error ("function %qs cannot be declared %<mutable%>", name
);
9945 storage_class
= sc_none
;
9949 error ("static %qs cannot be declared %<mutable%>", name
);
9950 storage_class
= sc_none
;
9952 else if (type_quals
& TYPE_QUAL_CONST
)
9954 error ("const %qs cannot be declared %<mutable%>", name
);
9955 storage_class
= sc_none
;
9957 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9959 permerror (input_location
, "reference %qs cannot be declared "
9960 "%<mutable%>", name
);
9961 storage_class
= sc_none
;
9965 /* If this is declaring a typedef name, return a TYPE_DECL. */
9966 if (decl_spec_seq_has_spec_p (declspecs
, ds_typedef
) && decl_context
!= TYPENAME
)
9970 /* Note that the grammar rejects storage classes
9971 in typenames, fields or parameters. */
9972 if (current_lang_name
== lang_name_java
)
9973 TYPE_FOR_JAVA (type
) = 1;
9975 /* This declaration:
9977 typedef void f(int) const;
9979 declares a function type which is not a member of any
9980 particular class, but which is cv-qualified; for
9981 example "f S::*" declares a pointer to a const-qualified
9982 member function of S. We record the cv-qualification in the
9984 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9986 type
= apply_memfn_quals (type
, memfn_quals
);
9988 /* We have now dealt with these qualifiers. */
9989 memfn_quals
= TYPE_UNQUALIFIED
;
9992 if (type_uses_auto (type
))
9994 error ("typedef declared %<auto%>");
9995 type
= error_mark_node
;
9998 if (decl_context
== FIELD
)
9999 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10001 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10002 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10003 error_at (DECL_SOURCE_LOCATION (decl
),
10004 "typedef name may not be a nested-name-specifier");
10005 TREE_TYPE (decl
) = error_mark_node
;
10008 if (decl_context
!= FIELD
)
10010 if (!current_function_decl
)
10011 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10012 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10013 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10014 (current_function_decl
)))
10015 /* The TYPE_DECL is "abstract" because there will be
10016 clones of this constructor/destructor, and there will
10017 be copies of this TYPE_DECL generated in those
10019 DECL_ABSTRACT (decl
) = 1;
10021 else if (current_class_type
10022 && constructor_name_p (unqualified_id
, current_class_type
))
10023 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10024 "as enclosing class",
10027 /* If the user declares "typedef struct {...} foo" then the
10028 struct will have an anonymous name. Fill that name in now.
10029 Nothing can refer to it, so nothing needs know about the name
10031 if (type
!= error_mark_node
10033 && TYPE_NAME (type
)
10034 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10035 && TYPE_ANONYMOUS_P (type
)
10036 && declspecs
->type_definition_p
10037 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10041 /* Replace the anonymous name with the real name everywhere. */
10042 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10044 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10045 /* We do not rename the debug info representing the
10046 anonymous tagged type because the standard says in
10047 [dcl.typedef] that the naming applies only for
10048 linkage purposes. */
10049 /*debug_hooks->set_name (t, decl);*/
10050 TYPE_NAME (t
) = decl
;
10053 if (TYPE_LANG_SPECIFIC (type
))
10054 TYPE_WAS_ANONYMOUS (type
) = 1;
10056 /* If this is a typedef within a template class, the nested
10057 type is a (non-primary) template. The name for the
10058 template needs updating as well. */
10059 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10060 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10061 = TYPE_IDENTIFIER (type
);
10063 /* Adjust linkage now that we aren't anonymous anymore. */
10064 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
10065 determine_visibility (TYPE_MAIN_DECL (type
));
10067 /* FIXME remangle member functions; member functions of a
10068 type with external linkage have external linkage. */
10072 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10073 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10075 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10076 memfn_quals
!= TYPE_UNQUALIFIED
,
10077 inlinep
, friendp
, raises
!= NULL_TREE
);
10079 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10080 /* Acknowledge that this was written:
10081 `using analias = atype;'. */
10082 TYPE_DECL_ALIAS_P (decl
) = 1;
10087 /* Detect the case of an array type of unspecified size
10088 which came, as such, direct from a typedef name.
10089 We must copy the type, so that the array's domain can be
10090 individually set by the object's initializer. */
10092 if (type
&& typedef_type
10093 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10094 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10095 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10097 /* Detect where we're using a typedef of function type to declare a
10098 function. PARMS will not be set, so we must create it now. */
10100 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10102 tree decls
= NULL_TREE
;
10105 for (args
= TYPE_ARG_TYPES (type
);
10106 args
&& args
!= void_list_node
;
10107 args
= TREE_CHAIN (args
))
10109 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10111 DECL_CHAIN (decl
) = decls
;
10115 parms
= nreverse (decls
);
10117 if (decl_context
!= TYPENAME
)
10119 /* A cv-qualifier-seq shall only be part of the function type
10120 for a non-static member function. [8.3.5/4 dcl.fct] */
10121 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
10122 && (current_class_type
== NULL_TREE
|| staticp
) )
10125 ? G_("qualified function types cannot be used to "
10126 "declare static member functions")
10127 : G_("qualified function types cannot be used to "
10128 "declare free functions"));
10129 type
= TYPE_MAIN_VARIANT (type
);
10132 /* The qualifiers on the function type become the qualifiers on
10133 the non-static member function. */
10134 memfn_quals
|= type_memfn_quals (type
);
10135 type_quals
= TYPE_UNQUALIFIED
;
10139 /* If this is a type name (such as, in a cast or sizeof),
10140 compute the type and return it now. */
10142 if (decl_context
== TYPENAME
)
10144 /* Note that the grammar rejects storage classes
10145 in typenames, fields or parameters. */
10146 if (type_quals
!= TYPE_UNQUALIFIED
)
10147 type_quals
= TYPE_UNQUALIFIED
;
10149 /* Special case: "friend class foo" looks like a TYPENAME context. */
10152 if (type_quals
!= TYPE_UNQUALIFIED
)
10154 error ("type qualifiers specified for friend class declaration");
10155 type_quals
= TYPE_UNQUALIFIED
;
10159 error ("%<inline%> specified for friend class declaration");
10165 /* Don't allow friend declaration without a class-key. */
10166 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10167 permerror (input_location
, "template parameters cannot be friends");
10168 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10169 permerror (input_location
, "friend declaration requires class-key, "
10170 "i.e. %<friend class %T::%D%>",
10171 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10173 permerror (input_location
, "friend declaration requires class-key, "
10174 "i.e. %<friend %#T%>",
10178 /* Only try to do this stuff if we didn't already give up. */
10179 if (type
!= integer_type_node
)
10181 /* A friendly class? */
10182 if (current_class_type
)
10183 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10184 /*complain=*/true);
10186 error ("trying to make class %qT a friend of global scope",
10189 type
= void_type_node
;
10192 else if (memfn_quals
)
10194 if (ctype
== NULL_TREE
10195 && TREE_CODE (type
) == METHOD_TYPE
)
10196 ctype
= TYPE_METHOD_BASETYPE (type
);
10199 type
= build_memfn_type (type
, ctype
, memfn_quals
);
10200 /* Core issue #547: need to allow this in template type args. */
10201 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10202 type
= apply_memfn_quals (type
, memfn_quals
);
10204 error ("invalid qualifiers on non-member function type");
10209 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10210 && decl_context
!= CATCHPARM
10211 && TREE_CODE (type
) != UNION_TYPE
10214 error ("abstract declarator %qT used as declaration", type
);
10215 return error_mark_node
;
10218 /* Only functions may be declared using an operator-function-id. */
10220 && IDENTIFIER_OPNAME_P (unqualified_id
)
10221 && TREE_CODE (type
) != FUNCTION_TYPE
10222 && TREE_CODE (type
) != METHOD_TYPE
)
10224 error ("declaration of %qD as non-function", unqualified_id
);
10225 return error_mark_node
;
10228 /* We don't check parameter types here because we can emit a better
10229 error message later. */
10230 if (decl_context
!= PARM
)
10232 type
= check_var_type (unqualified_id
, type
);
10233 if (type
== error_mark_node
)
10234 return error_mark_node
;
10237 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10238 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10240 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10242 if (ctype
|| in_namespace
)
10243 error ("cannot use %<::%> in parameter declaration");
10245 if (type_uses_auto (type
))
10247 error ("parameter declared %<auto%>");
10248 type
= error_mark_node
;
10251 /* A parameter declared as an array of T is really a pointer to T.
10252 One declared as a function is really a pointer to a function.
10253 One declared as a member is really a pointer to member. */
10255 if (TREE_CODE (type
) == ARRAY_TYPE
)
10257 /* Transfer const-ness of array into that of type pointed to. */
10258 type
= build_pointer_type (TREE_TYPE (type
));
10259 type_quals
= TYPE_UNQUALIFIED
;
10261 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10262 type
= build_pointer_type (type
);
10265 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10266 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10268 cp_cv_quals real_quals
= memfn_quals
;
10269 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10270 real_quals
|= TYPE_QUAL_CONST
;
10271 type
= build_memfn_type (type
, ctype
, real_quals
);
10277 if (decl_context
== PARM
)
10279 decl
= cp_build_parm_decl (unqualified_id
, type
);
10281 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10282 memfn_quals
!= TYPE_UNQUALIFIED
,
10283 inlinep
, friendp
, raises
!= NULL_TREE
);
10285 else if (decl_context
== FIELD
)
10287 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10288 && type_uses_auto (type
))
10290 error ("non-static data member declared %<auto%>");
10291 type
= error_mark_node
;
10294 /* The C99 flexible array extension. */
10295 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10296 && TYPE_DOMAIN (type
) == NULL_TREE
)
10298 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10299 tf_warning_or_error
);
10300 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10303 if (type
== error_mark_node
)
10305 /* Happens when declaring arrays of sizes which
10306 are error_mark_node, for example. */
10309 else if (in_namespace
&& !friendp
)
10311 /* Something like struct S { int N::j; }; */
10312 error ("invalid use of %<::%>");
10313 return error_mark_node
;
10315 else if (TREE_CODE (type
) == FUNCTION_TYPE
10316 || TREE_CODE (type
) == METHOD_TYPE
)
10319 tree function_context
;
10323 /* This should never happen in pure C++ (the check
10324 could be an assert). It could happen in
10325 Objective-C++ if someone writes invalid code that
10326 uses a function declaration for an instance
10327 variable or property (instance variables and
10328 properties are parsed as FIELD_DECLs, but they are
10329 part of an Objective-C class, not a C++ class).
10330 That code is invalid and is caught by this
10334 error ("declaration of function %qD in invalid context",
10336 return error_mark_node
;
10339 /* ``A union may [ ... ] not [ have ] virtual functions.''
10341 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10343 error ("function %qD declared virtual inside a union",
10345 return error_mark_node
;
10348 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10352 error ("%qD cannot be declared virtual, since it "
10353 "is always static",
10360 /* Check that the name used for a destructor makes sense. */
10361 if (sfk
== sfk_destructor
)
10363 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10367 gcc_assert (friendp
);
10368 error ("expected qualified name in friend declaration "
10369 "for destructor %qD", uqname
);
10370 return error_mark_node
;
10373 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10375 error ("declaration of %qD as member of %qT",
10377 return error_mark_node
;
10381 error ("a destructor cannot be %<constexpr%>");
10382 return error_mark_node
;
10385 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10387 error ("expected qualified name in friend declaration "
10388 "for constructor %qD",
10389 id_declarator
->u
.id
.unqualified_name
);
10390 return error_mark_node
;
10393 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10394 function_context
= (ctype
!= NULL_TREE
) ?
10395 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10396 publicp
= (! friendp
|| ! staticp
)
10397 && function_context
== NULL_TREE
;
10398 decl
= grokfndecl (ctype
, type
,
10399 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10400 ? unqualified_id
: dname
,
10403 virtualp
, flags
, memfn_quals
, raises
,
10404 friendp
? -1 : 0, friendp
, publicp
,
10405 inlinep
| (2 * constexpr_p
),
10407 funcdef_flag
, template_count
, in_namespace
,
10408 attrlist
, declarator
->id_loc
);
10409 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10410 if (decl
== NULL_TREE
)
10411 return error_mark_node
;
10413 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10414 /* The decl and setting of decl_attr is also turned off. */
10415 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10418 /* [class.conv.ctor]
10420 A constructor declared without the function-specifier
10421 explicit that can be called with a single parameter
10422 specifies a conversion from the type of its first
10423 parameter to the type of its class. Such a constructor
10424 is called a converting constructor. */
10425 if (explicitp
== 2)
10426 DECL_NONCONVERTING_P (decl
) = 1;
10428 else if (!staticp
&& !dependent_type_p (type
)
10429 && !COMPLETE_TYPE_P (complete_type (type
))
10430 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10432 if (unqualified_id
)
10433 error ("field %qD has incomplete type", unqualified_id
);
10435 error ("name %qT has incomplete type", type
);
10437 /* If we're instantiating a template, tell them which
10438 instantiation made the field's type be incomplete. */
10439 if (current_class_type
10440 && TYPE_NAME (current_class_type
)
10441 && IDENTIFIER_TEMPLATE (current_class_name
)
10443 && declspecs
->type
== type
)
10444 error (" in instantiation of template %qT",
10445 current_class_type
);
10447 return error_mark_node
;
10453 error ("%qE is neither function nor member function; "
10454 "cannot be declared friend", unqualified_id
);
10462 /* Friends are treated specially. */
10463 if (ctype
== current_class_type
)
10464 ; /* We already issued a permerror. */
10465 else if (decl
&& DECL_NAME (decl
))
10467 if (template_class_depth (current_class_type
) == 0)
10469 decl
= check_explicit_specialization
10470 (unqualified_id
, decl
, template_count
,
10471 2 * funcdef_flag
+ 4);
10472 if (decl
== error_mark_node
)
10473 return error_mark_node
;
10476 decl
= do_friend (ctype
, unqualified_id
, decl
,
10482 return error_mark_node
;
10485 /* Structure field. It may not be a function, except for C++. */
10487 if (decl
== NULL_TREE
)
10491 /* C++ allows static class members. All other work
10492 for this is done by grokfield. */
10493 decl
= build_lang_decl_loc (declarator
->id_loc
,
10494 VAR_DECL
, unqualified_id
, type
);
10495 set_linkage_for_static_data_member (decl
);
10496 /* Even if there is an in-class initialization, DECL
10497 is considered undefined until an out-of-class
10498 definition is provided. */
10499 DECL_EXTERNAL (decl
) = 1;
10503 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10504 if (declspecs
->gnu_thread_keyword_p
)
10505 DECL_GNU_TLS_P (decl
) = true;
10508 if (constexpr_p
&& !initialized
)
10510 error ("constexpr static data member %qD must have an "
10511 "initializer", decl
);
10512 constexpr_p
= false;
10519 error ("non-static data member %qE declared %<constexpr%>",
10521 constexpr_p
= false;
10523 decl
= build_decl (input_location
,
10524 FIELD_DECL
, unqualified_id
, type
);
10525 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10526 if (bitfield
&& !unqualified_id
)
10527 TREE_NO_WARNING (decl
) = 1;
10529 if (storage_class
== sc_mutable
)
10531 DECL_MUTABLE_P (decl
) = 1;
10532 storage_class
= sc_none
;
10537 /* An attempt is being made to initialize a non-static
10538 member. This is new in C++11. */
10539 maybe_warn_cpp0x (CPP0X_NSDMI
);
10541 /* If this has been parsed with static storage class, but
10542 errors forced staticp to be cleared, ensure NSDMI is
10544 if (declspecs
->storage_class
== sc_static
)
10545 DECL_INITIAL (decl
) = error_mark_node
;
10549 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10550 memfn_quals
!= TYPE_UNQUALIFIED
,
10551 inlinep
, friendp
, raises
!= NULL_TREE
);
10554 else if (TREE_CODE (type
) == FUNCTION_TYPE
10555 || TREE_CODE (type
) == METHOD_TYPE
)
10557 tree original_name
;
10560 if (!unqualified_id
)
10561 return error_mark_node
;
10563 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10564 original_name
= dname
;
10566 original_name
= unqualified_id
;
10568 if (storage_class
== sc_auto
)
10569 error ("storage class %<auto%> invalid for function %qs", name
);
10570 else if (storage_class
== sc_register
)
10571 error ("storage class %<register%> invalid for function %qs", name
);
10574 if (declspecs
->gnu_thread_keyword_p
)
10575 error ("storage class %<__thread%> invalid for function %qs",
10578 error ("storage class %<thread_local%> invalid for function %qs",
10582 if (virt_specifiers
)
10583 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10584 /* Function declaration not at top level.
10585 Storage classes other than `extern' are not allowed
10586 and `extern' makes no difference. */
10587 if (! toplevel_bindings_p ()
10588 && (storage_class
== sc_static
10589 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10592 if (storage_class
== sc_static
)
10593 pedwarn (input_location
, OPT_Wpedantic
,
10594 "%<static%> specified invalid for function %qs "
10595 "declared out of global scope", name
);
10597 pedwarn (input_location
, OPT_Wpedantic
,
10598 "%<inline%> specifier invalid for function %qs "
10599 "declared out of global scope", name
);
10602 if (ctype
== NULL_TREE
)
10606 error ("virtual non-class function %qs", name
);
10609 else if (sfk
== sfk_constructor
10610 || sfk
== sfk_destructor
)
10612 error (funcdef_flag
10613 ? G_("%qs defined in a non-class scope")
10614 : G_("%qs declared in a non-class scope"), name
);
10619 /* Record presence of `static'. */
10620 publicp
= (ctype
!= NULL_TREE
10621 || storage_class
== sc_extern
10622 || storage_class
!= sc_static
);
10624 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10625 virtualp
, flags
, memfn_quals
, raises
,
10627 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10629 template_count
, in_namespace
, attrlist
,
10630 declarator
->id_loc
);
10631 if (decl
== NULL_TREE
)
10632 return error_mark_node
;
10636 int invalid_static
= 0;
10638 /* Don't allow a static member function in a class, and forbid
10639 declaring main to be static. */
10640 if (TREE_CODE (type
) == METHOD_TYPE
)
10642 permerror (input_location
, "cannot declare member function %qD to have "
10643 "static linkage", decl
);
10644 invalid_static
= 1;
10646 else if (current_function_decl
)
10648 /* FIXME need arm citation */
10649 error ("cannot declare static function inside another function");
10650 invalid_static
= 1;
10653 if (invalid_static
)
10656 storage_class
= sc_none
;
10662 /* It's a variable. */
10664 /* An uninitialized decl with `extern' is a reference. */
10665 decl
= grokvardecl (type
, unqualified_id
,
10668 (type_quals
& TYPE_QUAL_CONST
) != 0,
10669 ctype
? ctype
: in_namespace
);
10670 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10671 memfn_quals
!= TYPE_UNQUALIFIED
,
10672 inlinep
, friendp
, raises
!= NULL_TREE
);
10676 DECL_CONTEXT (decl
) = ctype
;
10679 permerror (input_location
, "%<static%> may not be used when defining "
10680 "(as opposed to declaring) a static data member");
10682 storage_class
= sc_none
;
10684 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10686 error ("static member %qD declared %<register%>", decl
);
10687 storage_class
= sc_none
;
10689 if (storage_class
== sc_extern
&& pedantic
)
10691 pedwarn (input_location
, OPT_Wpedantic
,
10692 "cannot explicitly declare member %q#D to have "
10693 "extern linkage", decl
);
10694 storage_class
= sc_none
;
10697 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10699 error ("declaration of constexpr variable %qD is not a definition",
10701 constexpr_p
= false;
10705 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10707 if (toplevel_bindings_p ())
10709 /* It's common practice (and completely valid) to have a const
10710 be initialized and declared extern. */
10711 if (!(type_quals
& TYPE_QUAL_CONST
))
10712 warning (0, "%qs initialized and declared %<extern%>", name
);
10716 error ("%qs has both %<extern%> and initializer", name
);
10717 return error_mark_node
;
10721 /* Record `register' declaration for warnings on &
10722 and in case doing stupid register allocation. */
10724 if (storage_class
== sc_register
)
10725 DECL_REGISTER (decl
) = 1;
10726 else if (storage_class
== sc_extern
)
10727 DECL_THIS_EXTERN (decl
) = 1;
10728 else if (storage_class
== sc_static
)
10729 DECL_THIS_STATIC (decl
) = 1;
10731 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10732 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10733 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10735 /* Record constancy and volatility on the DECL itself . There's
10736 no need to do this when processing a template; we'll do this
10737 for the instantiated declaration based on the type of DECL. */
10738 if (!processing_template_decl
)
10739 cp_apply_type_quals_to_decl (type_quals
, decl
);
10745 /* Subroutine of start_function. Ensure that each of the parameter
10746 types (as listed in PARMS) is complete, as is required for a
10747 function definition. */
10750 require_complete_types_for_parms (tree parms
)
10752 for (; parms
; parms
= DECL_CHAIN (parms
))
10754 if (dependent_type_p (TREE_TYPE (parms
)))
10756 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10757 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10759 relayout_decl (parms
);
10760 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10763 /* grokparms or complete_type_or_else will have already issued
10765 TREE_TYPE (parms
) = error_mark_node
;
10769 /* Returns nonzero if T is a local variable. */
10772 local_variable_p (const_tree t
)
10774 if ((TREE_CODE (t
) == VAR_DECL
10775 /* A VAR_DECL with a context that is a _TYPE is a static data
10777 && !TYPE_P (CP_DECL_CONTEXT (t
))
10778 /* Any other non-local variable must be at namespace scope. */
10779 && !DECL_NAMESPACE_SCOPE_P (t
))
10780 || (TREE_CODE (t
) == PARM_DECL
))
10786 /* Like local_variable_p, but suitable for use as a tree-walking
10790 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10793 /* Check DECL_NAME to avoid including temporaries. We don't check
10794 DECL_ARTIFICIAL because we do want to complain about 'this'. */
10795 if (local_variable_p (*tp
) && DECL_NAME (*tp
))
10797 else if (TYPE_P (*tp
))
10798 *walk_subtrees
= 0;
10803 /* Check that ARG, which is a default-argument expression for a
10804 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10805 something goes wrong. DECL may also be a _TYPE node, rather than a
10806 DECL, if there is no DECL available. */
10809 check_default_argument (tree decl
, tree arg
)
10814 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10815 /* We get a DEFAULT_ARG when looking at an in-class declaration
10816 with a default argument. Ignore the argument for now; we'll
10817 deal with it after the class is complete. */
10826 decl_type
= TREE_TYPE (decl
);
10828 if (arg
== error_mark_node
10829 || decl
== error_mark_node
10830 || TREE_TYPE (arg
) == error_mark_node
10831 || decl_type
== error_mark_node
)
10832 /* Something already went wrong. There's no need to check
10834 return error_mark_node
;
10836 /* [dcl.fct.default]
10838 A default argument expression is implicitly converted to the
10840 ++cp_unevaluated_operand
;
10841 perform_implicit_conversion_flags (decl_type
, arg
, tf_warning_or_error
,
10843 --cp_unevaluated_operand
;
10845 if (warn_zero_as_null_pointer_constant
10846 && c_inhibit_evaluation_warnings
== 0
10847 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10848 && null_ptr_cst_p (arg
)
10849 && !NULLPTR_TYPE_P (TREE_TYPE (arg
)))
10851 warning (OPT_Wzero_as_null_pointer_constant
,
10852 "zero as null pointer constant");
10853 return nullptr_node
;
10856 /* [dcl.fct.default]
10858 Local variables shall not be used in default argument
10861 The keyword `this' shall not be used in a default argument of a
10862 member function. */
10863 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10866 if (DECL_NAME (var
) == this_identifier
)
10867 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10869 error ("default argument %qE uses local variable %qD", arg
, var
);
10870 return error_mark_node
;
10877 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10880 type_is_deprecated (tree type
)
10882 enum tree_code code
;
10883 if (TREE_DEPRECATED (type
))
10885 if (TYPE_NAME (type
)
10886 && TREE_DEPRECATED (TYPE_NAME (type
)))
10889 /* Do warn about using typedefs to a deprecated class. */
10890 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10891 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10893 code
= TREE_CODE (type
);
10895 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10896 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10897 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10898 return type_is_deprecated (TREE_TYPE (type
));
10900 if (TYPE_PTRMEMFUNC_P (type
))
10901 return type_is_deprecated
10902 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10907 /* Decode the list of parameter types for a function type.
10908 Given the list of things declared inside the parens,
10909 return a list of types.
10911 If this parameter does not end with an ellipsis, we append
10914 *PARMS is set to the chain of PARM_DECLs created. */
10917 grokparms (tree parmlist
, tree
*parms
)
10919 tree result
= NULL_TREE
;
10920 tree decls
= NULL_TREE
;
10924 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10926 tree type
= NULL_TREE
;
10927 tree init
= TREE_PURPOSE (parm
);
10928 tree decl
= TREE_VALUE (parm
);
10929 const char *errmsg
;
10931 if (parm
== void_list_node
)
10934 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10937 type
= TREE_TYPE (decl
);
10938 if (VOID_TYPE_P (type
))
10940 if (same_type_p (type
, void_type_node
)
10941 && DECL_SELF_REFERENCE_P (type
)
10942 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10943 /* this is a parmlist of `(void)', which is ok. */
10945 cxx_incomplete_type_error (decl
, type
);
10946 /* It's not a good idea to actually create parameters of
10947 type `void'; other parts of the compiler assume that a
10948 void type terminates the parameter list. */
10949 type
= error_mark_node
;
10950 TREE_TYPE (decl
) = error_mark_node
;
10953 if (type
!= error_mark_node
10954 && TYPE_FOR_JAVA (type
)
10955 && MAYBE_CLASS_TYPE_P (type
))
10957 error ("parameter %qD has Java class type", decl
);
10958 type
= error_mark_node
;
10959 TREE_TYPE (decl
) = error_mark_node
;
10963 if (type
!= error_mark_node
10964 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10967 type
= error_mark_node
;
10968 TREE_TYPE (decl
) = error_mark_node
;
10971 if (type
!= error_mark_node
)
10973 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10975 tree deptype
= type_is_deprecated (type
);
10977 warn_deprecated_use (deptype
, NULL_TREE
);
10980 /* Top-level qualifiers on the parameters are
10981 ignored for function types. */
10982 type
= cp_build_qualified_type (type
, 0);
10983 if (TREE_CODE (type
) == METHOD_TYPE
)
10985 error ("parameter %qD invalidly declared method type", decl
);
10986 type
= build_pointer_type (type
);
10987 TREE_TYPE (decl
) = type
;
10989 else if (abstract_virtuals_error (decl
, type
))
10990 any_error
= 1; /* Seems like a good idea. */
10991 else if (POINTER_TYPE_P (type
))
10993 /* [dcl.fct]/6, parameter types cannot contain pointers
10994 (references) to arrays of unknown bound. */
10995 tree t
= TREE_TYPE (type
);
10996 int ptr
= TYPE_PTR_P (type
);
11000 if (TYPE_PTR_P (t
))
11002 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11004 else if (!TYPE_DOMAIN (t
))
11008 if (TREE_CODE (t
) == ARRAY_TYPE
)
11010 ? G_("parameter %qD includes pointer to array of "
11011 "unknown bound %qT")
11012 : G_("parameter %qD includes reference to array of "
11013 "unknown bound %qT"),
11019 else if (init
&& !processing_template_decl
)
11020 init
= check_default_argument (decl
, init
);
11023 DECL_CHAIN (decl
) = decls
;
11025 result
= tree_cons (init
, type
, result
);
11027 decls
= nreverse (decls
);
11028 result
= nreverse (result
);
11030 result
= chainon (result
, void_list_node
);
11037 /* D is a constructor or overloaded `operator='.
11039 Let T be the class in which D is declared. Then, this function
11042 -1 if D's is an ill-formed constructor or copy assignment operator
11043 whose first parameter is of type `T'.
11044 0 if D is not a copy constructor or copy assignment
11046 1 if D is a copy constructor or copy assignment operator whose
11047 first parameter is a reference to non-const qualified T.
11048 2 if D is a copy constructor or copy assignment operator whose
11049 first parameter is a reference to const qualified T.
11051 This function can be used as a predicate. Positive values indicate
11052 a copy constructor and nonzero values indicate a copy assignment
11056 copy_fn_p (const_tree d
)
11062 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11064 if (TREE_CODE (d
) == TEMPLATE_DECL
11065 || (DECL_TEMPLATE_INFO (d
)
11066 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11067 /* Instantiations of template member functions are never copy
11068 functions. Note that member functions of templated classes are
11069 represented as template functions internally, and we must
11070 accept those as copy functions. */
11073 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11077 arg_type
= TREE_VALUE (args
);
11078 if (arg_type
== error_mark_node
)
11081 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11083 /* Pass by value copy assignment operator. */
11086 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11087 && !TYPE_REF_IS_RVALUE (arg_type
)
11088 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11090 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11096 args
= TREE_CHAIN (args
);
11098 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11099 /* There are more non-optional args. */
11105 /* D is a constructor or overloaded `operator='.
11107 Let T be the class in which D is declared. Then, this function
11108 returns true when D is a move constructor or move assignment
11109 operator, false otherwise. */
11112 move_fn_p (const_tree d
)
11114 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11116 if (cxx_dialect
== cxx98
)
11117 /* There are no move constructors if we are in C++98 mode. */
11120 if (TREE_CODE (d
) == TEMPLATE_DECL
11121 || (DECL_TEMPLATE_INFO (d
)
11122 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11123 /* Instantiations of template member functions are never move
11124 functions. Note that member functions of templated classes are
11125 represented as template functions internally, and we must
11126 accept those as move functions. */
11129 return move_signature_fn_p (d
);
11132 /* D is a constructor or overloaded `operator='.
11134 Then, this function returns true when D has the same signature as a move
11135 constructor or move assignment operator (because either it is such a
11136 ctor/op= or it is a template specialization with the same signature),
11137 false otherwise. */
11140 move_signature_fn_p (const_tree d
)
11144 bool result
= false;
11146 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11150 arg_type
= TREE_VALUE (args
);
11151 if (arg_type
== error_mark_node
)
11154 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11155 && TYPE_REF_IS_RVALUE (arg_type
)
11156 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11160 args
= TREE_CHAIN (args
);
11162 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11163 /* There are more non-optional args. */
11169 /* Remember any special properties of member function DECL. */
11172 grok_special_member_properties (tree decl
)
11176 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11179 class_type
= DECL_CONTEXT (decl
);
11180 if (DECL_CONSTRUCTOR_P (decl
))
11182 int ctor
= copy_fn_p (decl
);
11184 if (!DECL_ARTIFICIAL (decl
))
11185 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11191 A non-template constructor for class X is a copy
11192 constructor if its first parameter is of type X&, const
11193 X&, volatile X& or const volatile X&, and either there
11194 are no other parameters or else all other parameters have
11195 default arguments. */
11196 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11197 if (user_provided_p (decl
))
11198 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11200 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11202 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11204 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11205 if (user_provided_p (decl
))
11206 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11208 else if (move_fn_p (decl
) && user_provided_p (decl
))
11209 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11210 else if (is_list_ctor (decl
))
11211 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11213 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11214 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11215 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11217 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11221 A non-template assignment operator for class X is a copy
11222 assignment operator if its parameter is of type X, X&, const
11223 X&, volatile X& or const volatile X&. */
11225 int assop
= copy_fn_p (decl
);
11229 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11230 if (user_provided_p (decl
))
11231 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11233 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11235 else if (move_fn_p (decl
) && user_provided_p (decl
))
11236 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11238 /* Destructors are handled in check_methods. */
11241 /* Check a constructor DECL has the correct form. Complains
11242 if the class has a constructor of the form X(X). */
11245 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11247 int ctor_parm
= copy_fn_p (decl
);
11253 A declaration of a constructor for a class X is ill-formed if
11254 its first parameter is of type (optionally cv-qualified) X
11255 and either there are no other parameters or else all other
11256 parameters have default arguments.
11258 We *don't* complain about member template instantiations that
11259 have this form, though; they can occur as we try to decide
11260 what constructor to use during overload resolution. Since
11261 overload resolution will never prefer such a constructor to
11262 the non-template copy constructor (which is either explicitly
11263 or implicitly defined), there's no need to worry about their
11264 existence. Theoretically, they should never even be
11265 instantiated, but that's hard to forestall. */
11266 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11274 /* An operator with this code is unary, but can also be binary. */
11277 ambi_op_p (enum tree_code code
)
11279 return (code
== INDIRECT_REF
11280 || code
== ADDR_EXPR
11281 || code
== UNARY_PLUS_EXPR
11282 || code
== NEGATE_EXPR
11283 || code
== PREINCREMENT_EXPR
11284 || code
== PREDECREMENT_EXPR
);
11287 /* An operator with this name can only be unary. */
11290 unary_op_p (enum tree_code code
)
11292 return (code
== TRUTH_NOT_EXPR
11293 || code
== BIT_NOT_EXPR
11294 || code
== COMPONENT_REF
11295 || code
== TYPE_EXPR
);
11298 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11299 errors are issued for invalid declarations. */
11302 grok_op_properties (tree decl
, bool complain
)
11304 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11306 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11307 tree name
= DECL_NAME (decl
);
11308 enum tree_code operator_code
;
11313 /* Count the number of arguments and check for ellipsis. */
11314 for (argtype
= argtypes
, arity
= 0;
11315 argtype
&& argtype
!= void_list_node
;
11316 argtype
= TREE_CHAIN (argtype
))
11318 ellipsis_p
= !argtype
;
11320 class_type
= DECL_CONTEXT (decl
);
11321 if (class_type
&& !CLASS_TYPE_P (class_type
))
11322 class_type
= NULL_TREE
;
11324 if (DECL_CONV_FN_P (decl
))
11325 operator_code
= TYPE_EXPR
;
11329 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11330 if (ansi_opname (CODE) == name) \
11332 operator_code = (CODE); \
11335 else if (ansi_assopname (CODE) == name) \
11337 operator_code = (CODE); \
11338 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11342 #include "operators.def"
11343 #undef DEF_OPERATOR
11345 gcc_unreachable ();
11348 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11349 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11352 switch (operator_code
)
11355 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11359 TYPE_GETS_DELETE (class_type
) |= 1;
11363 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11366 case VEC_DELETE_EXPR
:
11367 TYPE_GETS_DELETE (class_type
) |= 2;
11374 /* [basic.std.dynamic.allocation]/1:
11376 A program is ill-formed if an allocation function is declared
11377 in a namespace scope other than global scope or declared static
11380 The same also holds true for deallocation functions. */
11381 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11382 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11384 if (DECL_NAMESPACE_SCOPE_P (decl
))
11386 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11388 error ("%qD may not be declared within a namespace", decl
);
11391 else if (!TREE_PUBLIC (decl
))
11393 error ("%qD may not be declared as static", decl
);
11399 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11401 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11402 DECL_IS_OPERATOR_NEW (decl
) = 1;
11404 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11405 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11408 /* An operator function must either be a non-static member function
11409 or have at least one parameter of a class, a reference to a class,
11410 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11411 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11413 if (operator_code
== TYPE_EXPR
11414 || operator_code
== CALL_EXPR
11415 || operator_code
== COMPONENT_REF
11416 || operator_code
== ARRAY_REF
11417 || operator_code
== NOP_EXPR
)
11419 error ("%qD must be a nonstatic member function", decl
);
11426 if (DECL_STATIC_FUNCTION_P (decl
))
11428 error ("%qD must be either a non-static member "
11429 "function or a non-member function", decl
);
11433 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11435 tree arg
= non_reference (TREE_VALUE (p
));
11436 if (arg
== error_mark_node
)
11439 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11440 because these checks are performed even on
11441 template functions. */
11442 if (MAYBE_CLASS_TYPE_P (arg
)
11443 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11447 if (!p
|| p
== void_list_node
)
11450 error ("%qD must have an argument of class or "
11451 "enumerated type", decl
);
11457 /* There are no restrictions on the arguments to an overloaded
11459 if (operator_code
== CALL_EXPR
)
11462 /* Warn about conversion operators that will never be used. */
11463 if (IDENTIFIER_TYPENAME_P (name
)
11464 && ! DECL_TEMPLATE_INFO (decl
)
11466 /* Warn only declaring the function; there is no need to
11467 warn again about out-of-class definitions. */
11468 && class_type
== current_class_type
)
11470 tree t
= TREE_TYPE (name
);
11471 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11474 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11476 if (TREE_CODE (t
) == VOID_TYPE
)
11477 warning (OPT_Wconversion
,
11479 ? G_("conversion to a reference to void "
11480 "will never use a type conversion operator")
11481 : G_("conversion to void "
11482 "will never use a type conversion operator"));
11483 else if (class_type
)
11485 if (t
== class_type
)
11486 warning (OPT_Wconversion
,
11488 ? G_("conversion to a reference to the same type "
11489 "will never use a type conversion operator")
11490 : G_("conversion to the same type "
11491 "will never use a type conversion operator"));
11492 /* Don't force t to be complete here. */
11493 else if (MAYBE_CLASS_TYPE_P (t
)
11494 && COMPLETE_TYPE_P (t
)
11495 && DERIVED_FROM_P (t
, class_type
))
11496 warning (OPT_Wconversion
,
11498 ? G_("conversion to a reference to a base class "
11499 "will never use a type conversion operator")
11500 : G_("conversion to a base class "
11501 "will never use a type conversion operator"));
11506 if (operator_code
== COND_EXPR
)
11509 error ("ISO C++ prohibits overloading operator ?:");
11512 else if (ellipsis_p
)
11514 error ("%qD must not have variable number of arguments", decl
);
11517 else if (ambi_op_p (operator_code
))
11520 /* We pick the one-argument operator codes by default, so
11521 we don't have to change anything. */
11523 else if (arity
== 2)
11525 /* If we thought this was a unary operator, we now know
11526 it to be a binary operator. */
11527 switch (operator_code
)
11530 operator_code
= MULT_EXPR
;
11534 operator_code
= BIT_AND_EXPR
;
11537 case UNARY_PLUS_EXPR
:
11538 operator_code
= PLUS_EXPR
;
11542 operator_code
= MINUS_EXPR
;
11545 case PREINCREMENT_EXPR
:
11546 operator_code
= POSTINCREMENT_EXPR
;
11549 case PREDECREMENT_EXPR
:
11550 operator_code
= POSTDECREMENT_EXPR
;
11554 gcc_unreachable ();
11557 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11559 if ((operator_code
== POSTINCREMENT_EXPR
11560 || operator_code
== POSTDECREMENT_EXPR
)
11561 && ! processing_template_decl
11562 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11565 error ("postfix %qD must take %<int%> as its argument",
11568 error ("postfix %qD must take %<int%> as its second "
11576 error ("%qD must take either zero or one argument", decl
);
11578 error ("%qD must take either one or two arguments", decl
);
11582 /* More Effective C++ rule 6. */
11584 && (operator_code
== POSTINCREMENT_EXPR
11585 || operator_code
== POSTDECREMENT_EXPR
11586 || operator_code
== PREINCREMENT_EXPR
11587 || operator_code
== PREDECREMENT_EXPR
))
11589 tree arg
= TREE_VALUE (argtypes
);
11590 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11591 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11592 arg
= TREE_TYPE (arg
);
11593 arg
= TYPE_MAIN_VARIANT (arg
);
11594 if (operator_code
== PREINCREMENT_EXPR
11595 || operator_code
== PREDECREMENT_EXPR
)
11597 if (TREE_CODE (ret
) != REFERENCE_TYPE
11598 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11600 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11601 build_reference_type (arg
));
11605 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11606 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11610 else if (unary_op_p (operator_code
))
11615 error ("%qD must take %<void%>", decl
);
11617 error ("%qD must take exactly one argument", decl
);
11621 else /* if (binary_op_p (operator_code)) */
11626 error ("%qD must take exactly one argument", decl
);
11628 error ("%qD must take exactly two arguments", decl
);
11632 /* More Effective C++ rule 7. */
11634 && (operator_code
== TRUTH_ANDIF_EXPR
11635 || operator_code
== TRUTH_ORIF_EXPR
11636 || operator_code
== COMPOUND_EXPR
))
11637 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11641 /* Effective C++ rule 23. */
11644 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11645 && (operator_code
== PLUS_EXPR
11646 || operator_code
== MINUS_EXPR
11647 || operator_code
== TRUNC_DIV_EXPR
11648 || operator_code
== MULT_EXPR
11649 || operator_code
== TRUNC_MOD_EXPR
)
11650 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11651 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11653 /* [over.oper]/8 */
11654 for (; argtypes
&& argtypes
!= void_list_node
;
11655 argtypes
= TREE_CHAIN (argtypes
))
11656 if (TREE_PURPOSE (argtypes
))
11658 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11659 if (operator_code
== POSTINCREMENT_EXPR
11660 || operator_code
== POSTDECREMENT_EXPR
)
11662 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11667 error ("%qD cannot have default arguments", decl
);
11675 /* Return a string giving the keyword associate with CODE. */
11677 static const char *
11678 tag_name (enum tag_types code
)
11690 case typename_type
:
11693 gcc_unreachable ();
11697 /* Name lookup in an elaborated-type-specifier (after the keyword
11698 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11699 elaborated-type-specifier is invalid, issue a diagnostic and return
11700 error_mark_node; otherwise, return the *_TYPE to which it referred.
11701 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11704 check_elaborated_type_specifier (enum tag_types tag_code
,
11706 bool allow_template_p
)
11710 if (decl
== error_mark_node
)
11711 return error_mark_node
;
11715 struct S { struct S *p; };
11717 name lookup will find the TYPE_DECL for the implicit "S::S"
11718 typedef. Adjust for that here. */
11719 if (DECL_SELF_REFERENCE_P (decl
))
11720 decl
= TYPE_NAME (TREE_TYPE (decl
));
11722 type
= TREE_TYPE (decl
);
11724 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11725 is false for this case as well. */
11726 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11728 error ("using template type parameter %qT after %qs",
11729 type
, tag_name (tag_code
));
11730 return error_mark_node
;
11732 /* Accept template template parameters. */
11733 else if (allow_template_p
11734 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11735 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11739 If the identifier resolves to a typedef-name or the
11740 simple-template-id resolves to an alias template
11741 specialization, the elaborated-type-specifier is ill-formed.
11743 In other words, the only legitimate declaration to use in the
11744 elaborated type specifier is the implicit typedef created when
11745 the type is declared. */
11746 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11747 && !DECL_SELF_REFERENCE_P (decl
)
11748 && tag_code
!= typename_type
)
11750 if (alias_template_specialization_p (type
))
11751 error ("using alias template specialization %qT after %qs",
11752 type
, tag_name (tag_code
));
11754 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11755 inform (DECL_SOURCE_LOCATION (decl
),
11756 "%qD has a previous declaration here", decl
);
11757 return error_mark_node
;
11759 else if (TREE_CODE (type
) != RECORD_TYPE
11760 && TREE_CODE (type
) != UNION_TYPE
11761 && tag_code
!= enum_type
11762 && tag_code
!= typename_type
)
11764 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11765 error ("%q+T has a previous declaration here", type
);
11766 return error_mark_node
;
11768 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11769 && tag_code
== enum_type
)
11771 error ("%qT referred to as enum", type
);
11772 error ("%q+T has a previous declaration here", type
);
11773 return error_mark_node
;
11775 else if (!allow_template_p
11776 && TREE_CODE (type
) == RECORD_TYPE
11777 && CLASSTYPE_IS_TEMPLATE (type
))
11779 /* If a class template appears as elaborated type specifier
11780 without a template header such as:
11782 template <class T> class C {};
11783 void f(class C); // No template header here
11785 then the required template argument is missing. */
11786 error ("template argument required for %<%s %T%>",
11787 tag_name (tag_code
),
11788 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11789 return error_mark_node
;
11795 /* Lookup NAME in elaborate type specifier in scope according to
11796 SCOPE and issue diagnostics if necessary.
11797 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11798 found, and ERROR_MARK_NODE for type error. */
11801 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11802 tag_scope scope
, bool template_header_p
)
11806 if (scope
== ts_global
)
11808 /* First try ordinary name lookup, ignoring hidden class name
11809 injected via friend declaration. */
11810 decl
= lookup_name_prefer_type (name
, 2);
11811 /* If that fails, the name will be placed in the smallest
11812 non-class, non-function-prototype scope according to 3.3.1/5.
11813 We may already have a hidden name declared as friend in this
11814 scope. So lookup again but not ignoring hidden names.
11815 If we find one, that name will be made visible rather than
11816 creating a new tag. */
11818 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11821 decl
= lookup_type_scope (name
, scope
);
11824 && (DECL_CLASS_TEMPLATE_P (decl
)
11825 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11826 decl
= DECL_TEMPLATE_RESULT (decl
);
11828 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11830 /* Look for invalid nested type:
11834 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11836 error ("%qD has the same name as the class in which it is "
11839 return error_mark_node
;
11842 /* Two cases we need to consider when deciding if a class
11843 template is allowed as an elaborated type specifier:
11844 1. It is a self reference to its own class.
11845 2. It comes with a template header.
11849 template <class T> class C {
11850 class C *c1; // DECL_SELF_REFERENCE_P is true
11853 template <class U> class C; // template_header_p is true
11854 template <class T> class C<T>::D {
11855 class C *c2; // DECL_SELF_REFERENCE_P is true
11858 t
= check_elaborated_type_specifier (tag_code
,
11861 | DECL_SELF_REFERENCE_P (decl
));
11864 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11866 error ("reference to %qD is ambiguous", name
);
11867 print_candidates (decl
);
11868 return error_mark_node
;
11874 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11875 Define the tag as a forward-reference if it is not defined.
11877 If a declaration is given, process it here, and report an error if
11878 multiple declarations are not identical.
11880 SCOPE is TS_CURRENT when this is also a definition. Only look in
11881 the current frame for the name (since C++ allows new names in any
11882 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11883 declaration. Only look beginning from the current scope outward up
11884 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11886 TEMPLATE_HEADER_P is true when this declaration is preceded by
11887 a set of template parameters. */
11890 xref_tag_1 (enum tag_types tag_code
, tree name
,
11891 tag_scope scope
, bool template_header_p
)
11893 enum tree_code code
;
11895 tree context
= NULL_TREE
;
11897 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11903 code
= RECORD_TYPE
;
11909 code
= ENUMERAL_TYPE
;
11912 gcc_unreachable ();
11915 /* In case of anonymous name, xref_tag is only called to
11916 make type node and push name. Name lookup is not required. */
11917 if (ANON_AGGRNAME_P (name
))
11920 t
= lookup_and_check_tag (tag_code
, name
,
11921 scope
, template_header_p
);
11923 if (t
== error_mark_node
)
11924 return error_mark_node
;
11926 if (scope
!= ts_current
&& t
&& current_class_type
11927 && template_class_depth (current_class_type
)
11928 && template_header_p
)
11930 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
11933 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11934 definition of this tag. Since, in addition, we are currently
11935 processing a (member) template declaration of a template
11936 class, we must be very careful; consider:
11943 { template <class V>
11944 friend struct S1; };
11946 Here, the S2::S1 declaration should not be confused with the
11947 outer declaration. In particular, the inner version should
11948 have a template parameter of level 2, not level 1. This
11949 would be particularly important if the member declaration
11952 template <class V = U> friend struct S1;
11954 say, when we should tsubst into `U' when instantiating
11955 S2. On the other hand, when presented with:
11965 we must find the inner binding eventually. We
11966 accomplish this by making sure that the new type we
11967 create to represent this declaration has the right
11969 context
= TYPE_CONTEXT (t
);
11975 /* If no such tag is yet defined, create a forward-reference node
11976 and record it as the "definition".
11977 When a real declaration of this type is found,
11978 the forward-reference will be altered into a real type. */
11979 if (code
== ENUMERAL_TYPE
)
11981 error ("use of enum %q#D without previous declaration", name
);
11982 return error_mark_node
;
11986 t
= make_class_type (code
);
11987 TYPE_CONTEXT (t
) = context
;
11988 t
= pushtag (name
, t
, scope
);
11993 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11995 if (!redeclare_class_template (t
, current_template_parms
))
11996 return error_mark_node
;
11998 else if (!processing_template_decl
11999 && CLASS_TYPE_P (t
)
12000 && CLASSTYPE_IS_TEMPLATE (t
))
12002 error ("redeclaration of %qT as a non-template", t
);
12003 error ("previous declaration %q+D", t
);
12004 return error_mark_node
;
12007 /* Make injected friend class visible. */
12008 if (scope
!= ts_within_enclosing_non_class
12009 && hidden_name_p (TYPE_NAME (t
)))
12011 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12012 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12014 if (TYPE_TEMPLATE_INFO (t
))
12016 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12017 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12025 /* Wrapper for xref_tag_1. */
12028 xref_tag (enum tag_types tag_code
, tree name
,
12029 tag_scope scope
, bool template_header_p
)
12033 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12034 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12035 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12041 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12043 enum tag_types tag_kind
;
12045 if (TREE_CODE (old
) == RECORD_TYPE
)
12046 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12048 tag_kind
= union_type
;
12050 if (id
== NULL_TREE
)
12051 id
= TYPE_IDENTIFIER (old
);
12053 return xref_tag (tag_kind
, id
, scope
, false);
12056 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12057 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12058 access_* node, and the TREE_VALUE is the type of the base-class.
12059 Non-NULL TREE_TYPE indicates virtual inheritance.
12061 Returns true if the binfo hierarchy was successfully created,
12062 false if an error was detected. */
12065 xref_basetypes (tree ref
, tree base_list
)
12068 tree binfo
, base_binfo
;
12069 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12070 unsigned max_bases
= 0; /* Maximum direct bases. */
12072 tree default_access
;
12073 tree igo_prev
; /* Track Inheritance Graph Order. */
12075 if (ref
== error_mark_node
)
12078 /* The base of a derived class is private by default, all others are
12080 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12081 && CLASSTYPE_DECLARED_CLASS (ref
)
12082 ? access_private_node
: access_public_node
);
12084 /* First, make sure that any templates in base-classes are
12085 instantiated. This ensures that if we call ourselves recursively
12086 we do not get confused about which classes are marked and which
12088 basep
= &base_list
;
12091 tree basetype
= TREE_VALUE (*basep
);
12093 /* The dependent_type_p call below should really be dependent_scope_p
12094 so that we give a hard error about using an incomplete type as a
12095 base, but we allow it with a pedwarn for backward
12097 if (processing_template_decl
12098 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12099 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12100 if (!dependent_type_p (basetype
)
12101 && !complete_type_or_else (basetype
, NULL
))
12102 /* An incomplete type. Remove it from the list. */
12103 *basep
= TREE_CHAIN (*basep
);
12107 if (TREE_TYPE (*basep
))
12109 if (CLASS_TYPE_P (basetype
))
12110 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
12111 basep
= &TREE_CHAIN (*basep
);
12115 TYPE_MARKED_P (ref
) = 1;
12117 /* The binfo slot should be empty, unless this is an (ill-formed)
12119 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12121 error ("redefinition of %q#T", ref
);
12125 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12127 binfo
= make_tree_binfo (max_bases
);
12129 TYPE_BINFO (ref
) = binfo
;
12130 BINFO_OFFSET (binfo
) = size_zero_node
;
12131 BINFO_TYPE (binfo
) = ref
;
12133 /* Apply base-class info set up to the variants of this type. */
12134 fixup_type_variants (ref
);
12138 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
12139 /* An aggregate cannot have baseclasses. */
12140 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12142 if (TREE_CODE (ref
) == UNION_TYPE
)
12144 error ("derived union %qT invalid", ref
);
12151 if (TYPE_FOR_JAVA (ref
))
12153 error ("Java class %qT cannot have multiple bases", ref
);
12160 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
12162 if (TYPE_FOR_JAVA (ref
))
12164 error ("Java class %qT cannot have virtual bases", ref
);
12169 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12171 tree access
= TREE_PURPOSE (base_list
);
12172 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12173 tree basetype
= TREE_VALUE (base_list
);
12175 if (access
== access_default_node
)
12176 access
= default_access
;
12178 if (PACK_EXPANSION_P (basetype
))
12179 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12180 if (TREE_CODE (basetype
) == TYPE_DECL
)
12181 basetype
= TREE_TYPE (basetype
);
12182 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12184 error ("base type %qT fails to be a struct or class type",
12189 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12190 TYPE_FOR_JAVA (ref
) = 1;
12192 base_binfo
= NULL_TREE
;
12193 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12195 base_binfo
= TYPE_BINFO (basetype
);
12196 /* The original basetype could have been a typedef'd type. */
12197 basetype
= BINFO_TYPE (base_binfo
);
12199 /* Inherit flags from the base. */
12200 TYPE_HAS_NEW_OPERATOR (ref
)
12201 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12202 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12203 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12204 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12205 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12206 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12207 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12208 CLASSTYPE_REPEATED_BASE_P (ref
)
12209 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12212 /* We must do this test after we've seen through a typedef
12214 if (TYPE_MARKED_P (basetype
))
12216 if (basetype
== ref
)
12217 error ("recursive type %qT undefined", basetype
);
12219 error ("duplicate base type %qT invalid", basetype
);
12223 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12224 /* Regenerate the pack expansion for the bases. */
12225 basetype
= make_pack_expansion (basetype
);
12227 TYPE_MARKED_P (basetype
) = 1;
12229 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12230 &igo_prev
, via_virtual
);
12231 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12232 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12234 BINFO_BASE_APPEND (binfo
, base_binfo
);
12235 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12238 if (VEC_length (tree
, CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12239 /* If we didn't get max_vbases vbases, we must have shared at
12240 least one of them, and are therefore diamond shaped. */
12241 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12243 /* Unmark all the types. */
12244 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12245 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12246 TYPE_MARKED_P (ref
) = 0;
12248 /* Now see if we have a repeated base type. */
12249 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12251 for (base_binfo
= binfo
; base_binfo
;
12252 base_binfo
= TREE_CHAIN (base_binfo
))
12254 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12256 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12259 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12261 for (base_binfo
= binfo
; base_binfo
;
12262 base_binfo
= TREE_CHAIN (base_binfo
))
12263 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12264 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12273 /* Copies the enum-related properties from type SRC to type DST.
12274 Used with the underlying type of an enum and the enum itself. */
12276 copy_type_enum (tree dst
, tree src
)
12279 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12281 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12282 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12283 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12284 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12285 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12286 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12287 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12288 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12289 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12293 /* Begin compiling the definition of an enumeration type.
12296 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12298 UNDERLYING_TYPE is the type that will be used as the storage for
12299 the enumeration type. This should be NULL_TREE if no storage type
12302 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12304 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12306 Returns the type object, as yet incomplete.
12307 Also records info about it so that build_enumerator
12308 may be used to declare the individual values as they are read. */
12311 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12312 bool scoped_enum_p
, bool *is_new
)
12314 tree prevtype
= NULL_TREE
;
12315 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
12319 /* [C++0x dcl.enum]p5:
12321 If not explicitly specified, the underlying type of a scoped
12322 enumeration type is int. */
12323 if (!underlying_type
&& scoped_enum_p
)
12324 underlying_type
= integer_type_node
;
12326 if (underlying_type
)
12327 underlying_type
= cv_unqualified (underlying_type
);
12329 /* If this is the real definition for a previous forward reference,
12330 fill in the contents in the same object that used to be the
12331 forward reference. */
12333 enumtype
= lookup_and_check_tag (enum_type
, name
,
12334 /*tag_scope=*/ts_current
,
12335 /*template_header_p=*/false);
12337 /* In case of a template_decl, the only check that should be deferred
12338 to instantiation time is the comparison of underlying types. */
12339 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12341 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12343 error_at (input_location
, "scoped/unscoped mismatch "
12344 "in enum %q#T", enumtype
);
12345 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12346 "previous definition here");
12347 enumtype
= error_mark_node
;
12349 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12351 error_at (input_location
, "underlying type mismatch "
12352 "in enum %q#T", enumtype
);
12353 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12354 "previous definition here");
12355 enumtype
= error_mark_node
;
12357 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12358 && !dependent_type_p (underlying_type
)
12359 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12360 && !same_type_p (underlying_type
,
12361 ENUM_UNDERLYING_TYPE (enumtype
)))
12363 error_at (input_location
, "different underlying type "
12364 "in enum %q#T", enumtype
);
12365 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12366 "previous definition here");
12367 underlying_type
= NULL_TREE
;
12371 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12372 || processing_template_decl
)
12374 /* In case of error, make a dummy enum to allow parsing to
12376 if (enumtype
== error_mark_node
)
12378 name
= make_anon_name ();
12379 enumtype
= NULL_TREE
;
12382 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12383 of an opaque enum, or an opaque enum of an already defined
12384 enumeration (C++0x only).
12385 In any other case, it'll be NULL_TREE. */
12391 prevtype
= enumtype
;
12393 /* Do not push the decl more than once, unless we need to
12394 compare underlying types at instantiation time */
12396 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12397 || (underlying_type
12398 && dependent_type_p (underlying_type
))
12399 || (ENUM_UNDERLYING_TYPE (enumtype
)
12400 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12402 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12403 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12406 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12409 if (enumtype
== error_mark_node
)
12410 return error_mark_node
;
12412 /* The enum is considered opaque until the opening '{' of the
12413 enumerator list. */
12414 SET_OPAQUE_ENUM_P (enumtype
, true);
12415 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12418 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12420 if (underlying_type
)
12422 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12424 copy_type_enum (enumtype
, underlying_type
);
12425 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12427 else if (dependent_type_p (underlying_type
))
12428 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12430 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12431 underlying_type
, enumtype
);
12434 /* If into a template class, the returned enum is always the first
12435 declaration (opaque or not) seen. This way all the references to
12436 this type will be to the same declaration. The following ones are used
12437 only to check for definition errors. */
12438 if (prevtype
&& processing_template_decl
)
12444 /* After processing and defining all the values of an enumeration type,
12445 install their decls in the enumeration type.
12446 ENUMTYPE is the type object. */
12449 finish_enum_value_list (tree enumtype
)
12452 tree underlying_type
;
12455 tree minnode
, maxnode
;
12458 bool fixed_underlying_type_p
12459 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12461 /* We built up the VALUES in reverse order. */
12462 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12464 /* For an enum defined in a template, just set the type of the values;
12465 all further processing is postponed until the template is
12466 instantiated. We need to set the type so that tsubst of a CONST_DECL
12468 if (processing_template_decl
)
12470 for (values
= TYPE_VALUES (enumtype
);
12472 values
= TREE_CHAIN (values
))
12473 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12477 /* Determine the minimum and maximum values of the enumerators. */
12478 if (TYPE_VALUES (enumtype
))
12480 minnode
= maxnode
= NULL_TREE
;
12482 for (values
= TYPE_VALUES (enumtype
);
12484 values
= TREE_CHAIN (values
))
12486 decl
= TREE_VALUE (values
);
12488 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12489 each enumerator has the type of its enumeration. Prior to the
12490 closing brace, the type of each enumerator is the type of its
12491 initializing value. */
12492 TREE_TYPE (decl
) = enumtype
;
12494 /* Update the minimum and maximum values, if appropriate. */
12495 value
= DECL_INITIAL (decl
);
12496 if (value
== error_mark_node
)
12497 value
= integer_zero_node
;
12498 /* Figure out what the minimum and maximum values of the
12499 enumerators are. */
12501 minnode
= maxnode
= value
;
12502 else if (tree_int_cst_lt (maxnode
, value
))
12504 else if (tree_int_cst_lt (value
, minnode
))
12511 If the enumerator-list is empty, the underlying type is as if
12512 the enumeration had a single enumerator with value 0. */
12513 minnode
= maxnode
= integer_zero_node
;
12515 if (!fixed_underlying_type_p
)
12517 /* Compute the number of bits require to represent all values of the
12518 enumeration. We must do this before the type of MINNODE and
12519 MAXNODE are transformed, since tree_int_cst_min_precision relies
12520 on the TREE_TYPE of the value it is passed. */
12521 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12522 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12523 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12524 int precision
= MAX (lowprec
, highprec
);
12526 bool use_short_enum
;
12528 /* Determine the underlying type of the enumeration.
12532 The underlying type of an enumeration is an integral type that
12533 can represent all the enumerator values defined in the
12534 enumeration. It is implementation-defined which integral type is
12535 used as the underlying type for an enumeration except that the
12536 underlying type shall not be larger than int unless the value of
12537 an enumerator cannot fit in an int or unsigned int.
12539 We use "int" or an "unsigned int" as the underlying type, even if
12540 a smaller integral type would work, unless the user has
12541 explicitly requested that we use the smallest possible type. The
12542 user can request that for all enumerations with a command line
12543 flag, or for just one enumeration with an attribute. */
12545 use_short_enum
= flag_short_enums
12546 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12548 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12552 underlying_type
= integer_types
[itk
];
12553 if (underlying_type
!= NULL_TREE
12554 && TYPE_PRECISION (underlying_type
) >= precision
12555 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12558 if (itk
== itk_none
)
12562 IF no integral type can represent all the enumerator values, the
12563 enumeration is ill-formed. */
12564 error ("no integral type can represent all of the enumerator values "
12565 "for %qT", enumtype
);
12566 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12567 underlying_type
= integer_types
[itk_unsigned_long_long
];
12572 The value of sizeof() applied to an enumeration type, an object
12573 of an enumeration type, or an enumerator, is the value of sizeof()
12574 applied to the underlying type. */
12575 copy_type_enum (enumtype
, underlying_type
);
12577 /* Compute the minimum and maximum values for the type.
12581 For an enumeration where emin is the smallest enumerator and emax
12582 is the largest, the values of the enumeration are the values of the
12583 underlying type in the range bmin to bmax, where bmin and bmax are,
12584 respectively, the smallest and largest values of the smallest bit-
12585 field that can store emin and emax. */
12587 /* The middle-end currently assumes that types with TYPE_PRECISION
12588 narrower than their underlying type are suitably zero or sign
12589 extended to fill their mode. Similarly, it assumes that the front
12590 end assures that a value of a particular type must be within
12591 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12593 We used to set these fields based on bmin and bmax, but that led
12594 to invalid assumptions like optimizing away bounds checking. So
12595 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12596 TYPE_MAX_VALUE to the values for the mode above and only restrict
12597 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12598 ENUM_UNDERLYING_TYPE (enumtype
)
12599 = build_distinct_type_copy (underlying_type
);
12600 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12601 set_min_and_max_values_for_integral_type
12602 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12604 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12605 if (flag_strict_enums
)
12606 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12610 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12612 /* Convert each of the enumerators to the type of the underlying
12613 type of the enumeration. */
12614 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12616 location_t saved_location
;
12618 decl
= TREE_VALUE (values
);
12619 saved_location
= input_location
;
12620 input_location
= DECL_SOURCE_LOCATION (decl
);
12621 if (fixed_underlying_type_p
)
12622 /* If the enumeration type has a fixed underlying type, we
12623 already checked all of the enumerator values. */
12624 value
= DECL_INITIAL (decl
);
12626 value
= perform_implicit_conversion (underlying_type
,
12627 DECL_INITIAL (decl
),
12628 tf_warning_or_error
);
12629 input_location
= saved_location
;
12631 /* Do not clobber shared ints. */
12632 value
= copy_node (value
);
12634 TREE_TYPE (value
) = enumtype
;
12635 DECL_INITIAL (decl
) = value
;
12638 /* Fix up all variant types of this enum type. */
12639 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12640 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12642 if (at_class_scope_p ()
12643 && COMPLETE_TYPE_P (current_class_type
)
12644 && UNSCOPED_ENUM_P (enumtype
))
12645 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12646 current_class_type
);
12648 /* Finish debugging output for this type. */
12649 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12652 /* Finishes the enum type. This is called only the first time an
12653 enumeration is seen, be it opaque or odinary.
12654 ENUMTYPE is the type object. */
12657 finish_enum (tree enumtype
)
12659 if (processing_template_decl
)
12661 if (at_function_scope_p ())
12662 add_stmt (build_min (TAG_DEFN
, enumtype
));
12666 /* If this is a forward declaration, there should not be any variants,
12667 though we can get a variant in the middle of an enum-specifier with
12668 wacky code like 'enum E { e = sizeof(const E*) };' */
12669 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12670 && (TYPE_VALUES (enumtype
)
12671 || !TYPE_NEXT_VARIANT (enumtype
)));
12674 /* Build and install a CONST_DECL for an enumeration constant of the
12675 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12676 LOC is the location of NAME.
12677 Assignment of sequential values by default is handled here. */
12680 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12686 /* If the VALUE was erroneous, pretend it wasn't there; that will
12687 result in the enum being assigned the next value in sequence. */
12688 if (value
== error_mark_node
)
12691 /* Remove no-op casts from the value. */
12693 STRIP_TYPE_NOPS (value
);
12695 if (! processing_template_decl
)
12697 /* Validate and default VALUE. */
12698 if (value
!= NULL_TREE
)
12700 value
= cxx_constant_value (value
);
12702 if (TREE_CODE (value
) != INTEGER_CST
12703 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12705 error ("enumerator value for %qD is not an integer constant",
12711 /* Default based on previous value. */
12712 if (value
== NULL_TREE
)
12714 if (TYPE_VALUES (enumtype
))
12719 /* C++03 7.2/4: If no initializer is specified for the first
12720 enumerator, the type is an unspecified integral
12721 type. Otherwise the type is the same as the type of the
12722 initializing value of the preceding enumerator unless the
12723 incremented value is not representable in that type, in
12724 which case the type is an unspecified integral type
12725 sufficient to contain the incremented value. */
12726 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12727 if (error_operand_p (prev_value
))
12728 value
= error_mark_node
;
12731 double_int di
= TREE_INT_CST (prev_value
)
12732 .add_with_sign (double_int_one
,
12733 false, &overflowed
);
12736 tree type
= TREE_TYPE (prev_value
);
12737 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12738 if (!double_int_fits_to_tree_p (type
, di
))
12741 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12743 type
= integer_types
[itk
];
12744 if (type
!= NULL_TREE
12745 && (pos
|| !TYPE_UNSIGNED (type
))
12746 && double_int_fits_to_tree_p (type
, di
))
12749 if (type
&& cxx_dialect
< cxx0x
12750 && itk
> itk_unsigned_long
)
12751 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12752 incremented enumerator value is too large for %<unsigned long%>" : "\
12753 incremented enumerator value is too large for %<long%>");
12755 if (type
== NULL_TREE
)
12758 value
= double_int_to_tree (type
, di
);
12763 error ("overflow in enumeration values at %qD", name
);
12764 value
= error_mark_node
;
12769 value
= integer_zero_node
;
12772 /* Remove no-op casts from the value. */
12773 STRIP_TYPE_NOPS (value
);
12775 /* If the underlying type of the enum is fixed, check whether
12776 the enumerator values fits in the underlying type. If it
12777 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12778 if (ENUM_UNDERLYING_TYPE (enumtype
)
12780 && TREE_CODE (value
) == INTEGER_CST
12781 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12783 error ("enumerator value %E is too large for underlying type %<%T%>",
12784 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12786 /* Silently convert the value so that we can continue. */
12787 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12792 /* C++ associates enums with global, function, or class declarations. */
12793 context
= current_scope ();
12795 /* Build the actual enumeration constant. Note that the enumeration
12796 constants have the underlying type of the enum (if it is fixed)
12797 or the type of their initializer (if the underlying type of the
12798 enum is not fixed):
12802 If the underlying type is fixed, the type of each enumerator
12803 prior to the closing brace is the underlying type; if the
12804 initializing value of an enumerator cannot be represented by
12805 the underlying type, the program is ill-formed. If the
12806 underlying type is not fixed, the type of each enumerator is
12807 the type of its initializing value.
12809 If the underlying type is not fixed, it will be computed by
12810 finish_enum and we will reset the type of this enumerator. Of
12811 course, if we're processing a template, there may be no value. */
12812 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12814 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12816 DECL_CONTEXT (decl
) = enumtype
;
12817 TREE_CONSTANT (decl
) = 1;
12818 TREE_READONLY (decl
) = 1;
12819 DECL_INITIAL (decl
) = value
;
12821 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12822 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12823 on the TYPE_FIELDS list for `S'. (That's so that you can say
12824 things like `S::i' later.) */
12825 finish_member_declaration (decl
);
12829 /* Add this enumeration constant to the list for this type. */
12830 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12833 /* Look for an enumerator with the given NAME within the enumeration
12834 type ENUMTYPE. This routine is used primarily for qualified name
12835 lookup into an enumerator in C++0x, e.g.,
12837 enum class Color { Red, Green, Blue };
12839 Color color = Color::Red;
12841 Returns the value corresponding to the enumerator, or
12842 NULL_TREE if no such enumerator was found. */
12844 lookup_enumerator (tree enumtype
, tree name
)
12847 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12849 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12850 return e
? TREE_VALUE (e
) : NULL_TREE
;
12854 /* We're defining DECL. Make sure that its type is OK. */
12857 check_function_type (tree decl
, tree current_function_parms
)
12859 tree fntype
= TREE_TYPE (decl
);
12860 tree return_type
= complete_type (TREE_TYPE (fntype
));
12862 /* In a function definition, arg types must be complete. */
12863 require_complete_types_for_parms (current_function_parms
);
12865 if (dependent_type_p (return_type
)
12866 || type_uses_auto (return_type
))
12868 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12869 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12871 tree args
= TYPE_ARG_TYPES (fntype
);
12873 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12874 error ("return type %q#T is incomplete", return_type
);
12876 error ("return type has Java class type %q#T", return_type
);
12878 /* Make it return void instead. */
12879 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12880 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12882 TREE_CHAIN (args
));
12884 fntype
= build_function_type (void_type_node
, args
);
12886 = build_exception_variant (fntype
,
12887 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12888 fntype
= (cp_build_type_attribute_variant
12889 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12890 TREE_TYPE (decl
) = fntype
;
12893 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12896 /* Create the FUNCTION_DECL for a function definition.
12897 DECLSPECS and DECLARATOR are the parts of the declaration;
12898 they describe the function's name and the type it returns,
12899 but twisted together in a fashion that parallels the syntax of C.
12901 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12902 DECLARATOR is really the DECL for the function we are about to
12903 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12904 indicating that the function is an inline defined in-class.
12906 This function creates a binding context for the function body
12907 as well as setting up the FUNCTION_DECL in current_function_decl.
12909 For C++, we must first check whether that datum makes any sense.
12910 For example, "class A local_a(1,2);" means that variable local_a
12911 is an aggregate of type A, which should have a constructor
12912 applied to it with the argument list [1, 2].
12914 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12915 or may be a BLOCK if the function has been defined previously
12916 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12917 error_mark_node if the function has never been defined, or
12918 a BLOCK if the function has been defined somewhere. */
12921 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12923 tree ctype
= NULL_TREE
;
12926 int doing_friend
= 0;
12927 cp_binding_level
*bl
;
12928 tree current_function_parms
;
12929 struct c_fileinfo
*finfo
12930 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12931 bool honor_interface
;
12933 /* Sanity check. */
12934 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12935 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12937 fntype
= TREE_TYPE (decl1
);
12938 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12939 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12941 /* ISO C++ 11.4/5. A friend function defined in a class is in
12942 the (lexical) scope of the class in which it is defined. */
12943 if (!ctype
&& DECL_FRIEND_P (decl1
))
12945 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12947 /* CTYPE could be null here if we're dealing with a template;
12948 for example, `inline friend float foo()' inside a template
12949 will have no CTYPE set. */
12950 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12956 if (DECL_DECLARED_INLINE_P (decl1
)
12957 && lookup_attribute ("noinline", attrs
))
12958 warning (0, "inline function %q+D given attribute noinline", decl1
);
12960 /* Handle gnu_inline attribute. */
12961 if (GNU_INLINE_P (decl1
))
12963 DECL_EXTERNAL (decl1
) = 1;
12964 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12965 DECL_INTERFACE_KNOWN (decl1
) = 1;
12966 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12969 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12970 /* This is a constructor, we must ensure that any default args
12971 introduced by this definition are propagated to the clones
12972 now. The clones are used directly in overload resolution. */
12973 adjust_clone_args (decl1
);
12975 /* Sometimes we don't notice that a function is a static member, and
12976 build a METHOD_TYPE for it. Fix that up now. */
12977 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12978 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12980 /* Set up current_class_type, and enter the scope of the class, if
12983 push_nested_class (ctype
);
12984 else if (DECL_STATIC_FUNCTION_P (decl1
))
12985 push_nested_class (DECL_CONTEXT (decl1
));
12987 /* Now that we have entered the scope of the class, we must restore
12988 the bindings for any template parameters surrounding DECL1, if it
12989 is an inline member template. (Order is important; consider the
12990 case where a template parameter has the same name as a field of
12991 the class.) It is not until after this point that
12992 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12993 if (flags
& SF_INCLASS_INLINE
)
12994 maybe_begin_member_template_processing (decl1
);
12996 /* Effective C++ rule 15. */
12998 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12999 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
13000 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13002 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13003 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13004 if (!DECL_INITIAL (decl1
))
13005 DECL_INITIAL (decl1
) = error_mark_node
;
13007 /* This function exists in static storage.
13008 (This does not mean `static' in the C sense!) */
13009 TREE_STATIC (decl1
) = 1;
13011 /* We must call push_template_decl after current_class_type is set
13012 up. (If we are processing inline definitions after exiting a
13013 class scope, current_class_type will be NULL_TREE until set above
13014 by push_nested_class.) */
13015 if (processing_template_decl
)
13017 /* FIXME: Handle error_mark_node more gracefully. */
13018 tree newdecl1
= push_template_decl (decl1
);
13019 if (newdecl1
!= error_mark_node
)
13023 /* We are now in the scope of the function being defined. */
13024 current_function_decl
= decl1
;
13026 /* Save the parm names or decls from this function's declarator
13027 where store_parm_decls will find them. */
13028 current_function_parms
= DECL_ARGUMENTS (decl1
);
13030 /* Make sure the parameter and return types are reasonable. When
13031 you declare a function, these types can be incomplete, but they
13032 must be complete when you define the function. */
13033 check_function_type (decl1
, current_function_parms
);
13035 /* Build the return declaration for the function. */
13036 restype
= TREE_TYPE (fntype
);
13038 if (DECL_RESULT (decl1
) == NULL_TREE
)
13042 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13043 DECL_ARTIFICIAL (resdecl
) = 1;
13044 DECL_IGNORED_P (resdecl
) = 1;
13045 DECL_RESULT (decl1
) = resdecl
;
13047 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13050 /* Let the user know we're compiling this function. */
13051 announce_function (decl1
);
13053 /* Record the decl so that the function name is defined.
13054 If we already have a decl for this name, and it is a FUNCTION_DECL,
13055 use the old decl. */
13056 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13058 /* A specialization is not used to guide overload resolution. */
13059 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13060 && !(DECL_USE_TEMPLATE (decl1
) &&
13061 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13063 tree olddecl
= pushdecl (decl1
);
13065 if (olddecl
== error_mark_node
)
13066 /* If something went wrong when registering the declaration,
13067 use DECL1; we have to have a FUNCTION_DECL to use when
13068 parsing the body of the function. */
13072 /* Otherwise, OLDDECL is either a previous declaration
13073 of the same function or DECL1 itself. */
13075 if (warn_missing_declarations
13076 && olddecl
== decl1
13077 && !DECL_MAIN_P (decl1
)
13078 && TREE_PUBLIC (decl1
)
13079 && !DECL_DECLARED_INLINE_P (decl1
))
13083 /* Check whether DECL1 is in an anonymous
13085 for (context
= DECL_CONTEXT (decl1
);
13087 context
= DECL_CONTEXT (context
))
13089 if (TREE_CODE (context
) == NAMESPACE_DECL
13090 && DECL_NAME (context
) == NULL_TREE
)
13094 if (context
== NULL
)
13095 warning (OPT_Wmissing_declarations
,
13096 "no previous declaration for %q+D", decl1
);
13104 /* We need to set the DECL_CONTEXT. */
13105 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13106 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13108 fntype
= TREE_TYPE (decl1
);
13110 /* If #pragma weak applies, mark the decl appropriately now.
13111 The pragma only applies to global functions. Because
13112 determining whether or not the #pragma applies involves
13113 computing the mangled name for the declaration, we cannot
13114 apply the pragma until after we have merged this declaration
13115 with any previous declarations; if the original declaration
13116 has a linkage specification, that specification applies to
13117 the definition as well, and may affect the mangled name. */
13118 if (DECL_FILE_SCOPE_P (decl1
))
13119 maybe_apply_pragma_weak (decl1
);
13122 /* Reset this in case the call to pushdecl changed it. */
13123 current_function_decl
= decl1
;
13125 gcc_assert (DECL_INITIAL (decl1
));
13127 /* This function may already have been parsed, in which case just
13128 return; our caller will skip over the body without parsing. */
13129 if (DECL_INITIAL (decl1
) != error_mark_node
)
13132 /* Initialize RTL machinery. We cannot do this until
13133 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13134 even when processing a template; this is how we get
13135 CFUN set up, and our per-function variables initialized.
13136 FIXME factor out the non-RTL stuff. */
13137 bl
= current_binding_level
;
13138 allocate_struct_function (decl1
, processing_template_decl
);
13140 /* Initialize the language data structures. Whenever we start
13141 a new function, we destroy temporaries in the usual way. */
13142 cfun
->language
= ggc_alloc_cleared_language_function ();
13143 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13144 current_binding_level
= bl
;
13146 if (!processing_template_decl
&& type_uses_auto (restype
))
13148 FNDECL_USED_AUTO (decl1
) = true;
13149 current_function_auto_return_pattern
= restype
;
13152 /* Start the statement-tree, start the tree now. */
13153 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13155 /* If we are (erroneously) defining a function that we have already
13156 defined before, wipe out what we knew before. */
13157 if (!DECL_PENDING_INLINE_P (decl1
))
13158 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13160 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13162 /* We know that this was set up by `grokclassfn'. We do not
13163 wait until `store_parm_decls', since evil parse errors may
13164 never get us to that point. Here we keep the consistency
13165 between `current_class_type' and `current_class_ptr'. */
13166 tree t
= DECL_ARGUMENTS (decl1
);
13168 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13169 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
13171 cp_function_chain
->x_current_class_ref
13172 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13173 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13174 cp_function_chain
->x_current_class_ptr
= t
;
13176 /* Constructors and destructors need to know whether they're "in
13177 charge" of initializing virtual base classes. */
13178 t
= DECL_CHAIN (t
);
13179 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13181 current_in_charge_parm
= t
;
13182 t
= DECL_CHAIN (t
);
13184 if (DECL_HAS_VTT_PARM_P (decl1
))
13186 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13187 current_vtt_parm
= t
;
13191 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13192 /* Implicitly-defined methods (like the
13193 destructor for a class in which no destructor
13194 is explicitly declared) must not be defined
13195 until their definition is needed. So, we
13196 ignore interface specifications for
13197 compiler-generated functions. */
13198 && !DECL_ARTIFICIAL (decl1
));
13200 if (processing_template_decl
)
13201 /* Don't mess with interface flags. */;
13202 else if (DECL_INTERFACE_KNOWN (decl1
))
13204 tree ctx
= decl_function_context (decl1
);
13206 if (DECL_NOT_REALLY_EXTERN (decl1
))
13207 DECL_EXTERNAL (decl1
) = 0;
13209 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
13210 && TREE_PUBLIC (ctx
))
13211 /* This is a function in a local class in an extern inline
13213 comdat_linkage (decl1
);
13215 /* If this function belongs to an interface, it is public.
13216 If it belongs to someone else's interface, it is also external.
13217 This only affects inlines and template instantiations. */
13218 else if (!finfo
->interface_unknown
&& honor_interface
)
13220 if (DECL_DECLARED_INLINE_P (decl1
)
13221 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13223 DECL_EXTERNAL (decl1
)
13224 = (finfo
->interface_only
13225 || (DECL_DECLARED_INLINE_P (decl1
)
13226 && ! flag_implement_inlines
13227 && !DECL_VINDEX (decl1
)));
13229 /* For WIN32 we also want to put these in linkonce sections. */
13230 maybe_make_one_only (decl1
);
13233 DECL_EXTERNAL (decl1
) = 0;
13234 DECL_INTERFACE_KNOWN (decl1
) = 1;
13235 /* If this function is in an interface implemented in this file,
13236 make sure that the back end knows to emit this function
13238 if (!DECL_EXTERNAL (decl1
))
13239 mark_needed (decl1
);
13241 else if (finfo
->interface_unknown
&& finfo
->interface_only
13242 && honor_interface
)
13244 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13245 interface, we will have both finfo->interface_unknown and
13246 finfo->interface_only set. In that case, we don't want to
13247 use the normal heuristics because someone will supply a
13248 #pragma implementation elsewhere, and deducing it here would
13249 produce a conflict. */
13250 comdat_linkage (decl1
);
13251 DECL_EXTERNAL (decl1
) = 0;
13252 DECL_INTERFACE_KNOWN (decl1
) = 1;
13253 DECL_DEFER_OUTPUT (decl1
) = 1;
13257 /* This is a definition, not a reference.
13258 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13259 if (!GNU_INLINE_P (decl1
))
13260 DECL_EXTERNAL (decl1
) = 0;
13262 if ((DECL_DECLARED_INLINE_P (decl1
)
13263 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13264 && ! DECL_INTERFACE_KNOWN (decl1
))
13265 DECL_DEFER_OUTPUT (decl1
) = 1;
13267 DECL_INTERFACE_KNOWN (decl1
) = 1;
13270 /* Determine the ELF visibility attribute for the function. We must not
13271 do this before calling "pushdecl", as we must allow "duplicate_decls"
13272 to merge any attributes appropriately. We also need to wait until
13274 if (!DECL_CLONED_FUNCTION_P (decl1
))
13275 determine_visibility (decl1
);
13277 begin_scope (sk_function_parms
, decl1
);
13281 if (DECL_DESTRUCTOR_P (decl1
)
13282 || (DECL_CONSTRUCTOR_P (decl1
)
13283 && targetm
.cxx
.cdtor_returns_this ()))
13285 cdtor_label
= build_decl (input_location
,
13286 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13287 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13290 start_fname_decls ();
13292 store_parm_decls (current_function_parms
);
13296 /* Like start_preparsed_function, except that instead of a
13297 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13299 Returns 1 on success. If the DECLARATOR is not suitable for a function
13300 (it defines a datum instead), we return 0, which tells
13301 yyparse to report a parse error. */
13304 start_function (cp_decl_specifier_seq
*declspecs
,
13305 const cp_declarator
*declarator
,
13310 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13311 if (decl1
== error_mark_node
)
13313 /* If the declarator is not suitable for a function definition,
13314 cause a syntax error. */
13315 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13317 error ("invalid function declaration");
13321 if (DECL_MAIN_P (decl1
))
13322 /* main must return int. grokfndecl should have corrected it
13323 (and issued a diagnostic) if the user got it wrong. */
13324 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13325 integer_type_node
));
13327 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13332 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13336 use_eh_spec_block (tree fn
)
13338 return (flag_exceptions
&& flag_enforce_eh_specs
13339 && !processing_template_decl
13340 && !type_throw_all_p (TREE_TYPE (fn
))
13341 /* We insert the EH_SPEC_BLOCK only in the original
13342 function; then, it is copied automatically to the
13344 && !DECL_CLONED_FUNCTION_P (fn
)
13345 /* Implicitly-generated constructors and destructors have
13346 exception specifications. However, those specifications
13347 are the union of the possible exceptions specified by the
13348 constructors/destructors for bases and members, so no
13349 unallowed exception will ever reach this function. By
13350 not creating the EH_SPEC_BLOCK we save a little memory,
13351 and we avoid spurious warnings about unreachable
13353 && !DECL_DEFAULTED_FN (fn
));
13356 /* Store the parameter declarations into the current function declaration.
13357 This is called after parsing the parameter declarations, before
13358 digesting the body of the function.
13360 Also install to binding contour return value identifier, if any. */
13363 store_parm_decls (tree current_function_parms
)
13365 tree fndecl
= current_function_decl
;
13368 /* This is a chain of any other decls that came in among the parm
13369 declarations. If a parm is declared with enum {foo, bar} x;
13370 then CONST_DECLs for foo and bar are put here. */
13371 tree nonparms
= NULL_TREE
;
13373 if (current_function_parms
)
13375 /* This case is when the function was defined with an ANSI prototype.
13376 The parms already have decls, so we need not do anything here
13377 except record them as in effect
13378 and complain if any redundant old-style parm decls were written. */
13380 tree specparms
= current_function_parms
;
13383 /* Must clear this because it might contain TYPE_DECLs declared
13385 current_binding_level
->names
= NULL
;
13387 /* If we're doing semantic analysis, then we'll call pushdecl
13388 for each of these. We must do them in reverse order so that
13389 they end in the correct forward order. */
13390 specparms
= nreverse (specparms
);
13392 for (parm
= specparms
; parm
; parm
= next
)
13394 next
= DECL_CHAIN (parm
);
13395 if (TREE_CODE (parm
) == PARM_DECL
)
13397 if (DECL_NAME (parm
) == NULL_TREE
13398 || TREE_CODE (parm
) != VOID_TYPE
)
13401 error ("parameter %qD declared void", parm
);
13405 /* If we find an enum constant or a type tag,
13406 put it aside for the moment. */
13407 TREE_CHAIN (parm
) = NULL_TREE
;
13408 nonparms
= chainon (nonparms
, parm
);
13412 /* Get the decls in their original chain order and record in the
13413 function. This is all and only the PARM_DECLs that were
13414 pushed into scope by the loop above. */
13415 DECL_ARGUMENTS (fndecl
) = getdecls ();
13418 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13420 /* Now store the final chain of decls for the arguments
13421 as the decl-chain of the current lexical scope.
13422 Put the enumerators in as well, at the front so that
13423 DECL_ARGUMENTS is not modified. */
13424 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13426 if (use_eh_spec_block (current_function_decl
))
13427 current_eh_spec_block
= begin_eh_spec_block ();
13431 /* We have finished doing semantic analysis on DECL, but have not yet
13432 generated RTL for its body. Save away our current state, so that
13433 when we want to generate RTL later we know what to do. */
13436 save_function_data (tree decl
)
13438 struct language_function
*f
;
13440 /* Save the language-specific per-function data so that we can
13441 get it back when we really expand this function. */
13442 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13445 f
= ggc_alloc_language_function ();
13446 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13447 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13449 /* Clear out the bits we don't need. */
13450 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13451 f
->bindings
= NULL
;
13452 f
->x_local_names
= NULL
;
13453 f
->base
.local_typedefs
= NULL
;
13457 /* Set the return value of the constructor (if present). */
13460 finish_constructor_body (void)
13465 if (targetm
.cxx
.cdtor_returns_this ()
13466 && (! TYPE_FOR_JAVA (current_class_type
)))
13468 /* Any return from a constructor will end up here. */
13469 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13471 val
= DECL_ARGUMENTS (current_function_decl
);
13472 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13473 DECL_RESULT (current_function_decl
), val
);
13474 /* Return the address of the object. */
13475 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13476 add_stmt (exprstmt
);
13480 /* Do all the processing for the beginning of a destructor; set up the
13481 vtable pointers and cleanups for bases and members. */
13484 begin_destructor_body (void)
13486 tree compound_stmt
;
13488 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13489 issued an error message. We still want to try to process the
13490 body of the function, but initialize_vtbl_ptrs will crash if
13491 TYPE_BINFO is NULL. */
13492 if (COMPLETE_TYPE_P (current_class_type
))
13494 compound_stmt
= begin_compound_stmt (0);
13495 /* Make all virtual function table pointers in non-virtual base
13496 classes point to CURRENT_CLASS_TYPE's virtual function
13498 initialize_vtbl_ptrs (current_class_ptr
);
13499 finish_compound_stmt (compound_stmt
);
13501 /* And insert cleanups for our bases and members so that they
13502 will be properly destroyed if we throw. */
13503 push_base_cleanups ();
13507 /* At the end of every destructor we generate code to delete the object if
13508 necessary. Do that now. */
13511 finish_destructor_body (void)
13515 /* Any return from a destructor will end up here; that way all base
13516 and member cleanups will be run when the function returns. */
13517 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13519 /* In a virtual destructor, we must call delete. */
13520 if (DECL_VIRTUAL_P (current_function_decl
))
13523 tree virtual_size
= cxx_sizeof (current_class_type
);
13527 At the point of definition of a virtual destructor (including
13528 an implicit definition), non-placement operator delete shall
13529 be looked up in the scope of the destructor's class and if
13530 found shall be accessible and unambiguous. */
13531 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13533 /*global_p=*/false,
13534 /*placement=*/NULL_TREE
,
13535 /*alloc_fn=*/NULL_TREE
,
13536 tf_warning_or_error
);
13538 if_stmt
= begin_if_stmt ();
13539 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13540 current_in_charge_parm
,
13543 finish_expr_stmt (exprstmt
);
13544 finish_then_clause (if_stmt
);
13545 finish_if_stmt (if_stmt
);
13548 if (targetm
.cxx
.cdtor_returns_this ())
13552 val
= DECL_ARGUMENTS (current_function_decl
);
13553 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13554 DECL_RESULT (current_function_decl
), val
);
13555 /* Return the address of the object. */
13556 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13557 add_stmt (exprstmt
);
13561 /* Do the necessary processing for the beginning of a function body, which
13562 in this case includes member-initializers, but not the catch clauses of
13563 a function-try-block. Currently, this means opening a binding level
13564 for the member-initializers (in a ctor), member cleanups (in a dtor),
13565 and capture proxies (in a lambda operator()). */
13568 begin_function_body (void)
13572 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13575 if (processing_template_decl
)
13576 /* Do nothing now. */;
13578 /* Always keep the BLOCK node associated with the outermost pair of
13579 curly braces of a function. These are needed for correct
13580 operation of dwarfout.c. */
13581 keep_next_level (true);
13583 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13585 if (processing_template_decl
)
13586 /* Do nothing now. */;
13587 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13588 begin_destructor_body ();
13593 /* Do the processing for the end of a function body. Currently, this means
13594 closing out the cleanups for fully-constructed bases and members, and in
13595 the case of the destructor, deleting the object if desired. Again, this
13596 is only meaningful for [cd]tors, since they are the only functions where
13597 there is a significant distinction between the main body and any
13598 function catch clauses. Handling, say, main() return semantics here
13599 would be wrong, as flowing off the end of a function catch clause for
13600 main() would also need to return 0. */
13603 finish_function_body (tree compstmt
)
13605 if (compstmt
== NULL_TREE
)
13608 /* Close the block. */
13609 finish_compound_stmt (compstmt
);
13611 if (processing_template_decl
)
13612 /* Do nothing now. */;
13613 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13614 finish_constructor_body ();
13615 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13616 finish_destructor_body ();
13619 /* Given a function, returns the BLOCK corresponding to the outermost level
13620 of curly braces, skipping the artificial block created for constructor
13624 outer_curly_brace_block (tree fndecl
)
13626 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13627 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13628 /* Skip the artificial function body block. */
13629 block
= BLOCK_SUBBLOCKS (block
);
13633 /* If FNDECL is a class's key method, add the class to the list of
13634 keyed classes that should be emitted. */
13637 record_key_method_defined (tree fndecl
)
13639 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13640 && DECL_VIRTUAL_P (fndecl
)
13641 && !processing_template_decl
)
13643 tree fnclass
= DECL_CONTEXT (fndecl
);
13644 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13645 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13649 /* Subroutine of finish_function.
13650 Save the body of constexpr functions for possible
13651 future compile time evaluation. */
13654 maybe_save_function_definition (tree fun
)
13656 if (!processing_template_decl
13657 && DECL_DECLARED_CONSTEXPR_P (fun
)
13658 && !DECL_CLONED_FUNCTION_P (fun
))
13659 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13662 /* Finish up a function declaration and compile that function
13663 all the way to assembler language output. The free the storage
13664 for the function definition.
13666 FLAGS is a bitwise or of the following values:
13668 We just finished processing the body of an in-class inline
13669 function definition. (This processing will have taken place
13670 after the class definition is complete.) */
13673 finish_function (int flags
)
13675 tree fndecl
= current_function_decl
;
13676 tree fntype
, ctype
= NULL_TREE
;
13677 int inclass_inline
= (flags
& 2) != 0;
13679 /* When we get some parse errors, we can end up without a
13680 current_function_decl, so cope. */
13681 if (fndecl
== NULL_TREE
)
13682 return error_mark_node
;
13684 if (c_dialect_objc ())
13685 objc_finish_function ();
13687 gcc_assert (!defer_mark_used_calls
);
13688 defer_mark_used_calls
= true;
13690 record_key_method_defined (fndecl
);
13692 fntype
= TREE_TYPE (fndecl
);
13694 /* TREE_READONLY (fndecl) = 1;
13695 This caused &foo to be of type ptr-to-const-function
13696 which then got a warning when stored in a ptr-to-function variable. */
13698 gcc_assert (building_stmt_list_p ());
13699 /* The current function is being defined, so its DECL_INITIAL should
13700 be set, and unless there's a multiple definition, it should be
13701 error_mark_node. */
13702 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13704 /* For a cloned function, we've already got all the code we need;
13705 there's no need to add any extra bits. */
13706 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13708 /* Make it so that `main' always returns 0 by default. */
13709 if (DECL_MAIN_P (current_function_decl
))
13710 finish_return_stmt (integer_zero_node
);
13712 if (use_eh_spec_block (current_function_decl
))
13713 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13714 (TREE_TYPE (current_function_decl
)),
13715 current_eh_spec_block
);
13718 /* If we're saving up tree structure, tie off the function now. */
13719 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13721 finish_fname_decls ();
13723 /* If this function can't throw any exceptions, remember that. */
13724 if (!processing_template_decl
13725 && !cp_function_chain
->can_throw
13726 && !flag_non_call_exceptions
13727 && !decl_replaceable_p (fndecl
))
13728 TREE_NOTHROW (fndecl
) = 1;
13730 /* This must come after expand_function_end because cleanups might
13731 have declarations (from inline functions) that need to go into
13732 this function's blocks. */
13734 /* If the current binding level isn't the outermost binding level
13735 for this function, either there is a bug, or we have experienced
13736 syntax errors and the statement tree is malformed. */
13737 if (current_binding_level
->kind
!= sk_function_parms
)
13739 /* Make sure we have already experienced errors. */
13740 gcc_assert (errorcount
);
13742 /* Throw away the broken statement tree and extra binding
13744 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13746 while (current_binding_level
->kind
!= sk_function_parms
)
13748 if (current_binding_level
->kind
== sk_class
)
13749 pop_nested_class ();
13751 poplevel (0, 0, 0);
13754 poplevel (1, 0, 1);
13756 /* Statements should always be full-expressions at the outermost set
13757 of curly braces for a function. */
13758 gcc_assert (stmts_are_full_exprs_p ());
13760 /* If there are no return statements in a function with auto return type,
13761 the return type is void. But if the declared type is something like
13762 auto*, this is an error. */
13763 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13764 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13766 if (!is_auto (current_function_auto_return_pattern
)
13767 && !current_function_returns_value
&& !current_function_returns_null
)
13769 error ("no return statements in function returning %qT",
13770 current_function_auto_return_pattern
);
13771 inform (input_location
, "only plain %<auto%> return type can be "
13772 "deduced to %<void%>");
13774 apply_deduced_return_type (fndecl
, void_type_node
);
13775 fntype
= TREE_TYPE (fndecl
);
13778 /* Save constexpr function body before it gets munged by
13779 the NRV transformation. */
13780 maybe_save_function_definition (fndecl
);
13782 /* Set up the named return value optimization, if we can. Candidate
13783 variables are selected in check_return_expr. */
13784 if (current_function_return_value
)
13786 tree r
= current_function_return_value
;
13789 if (r
!= error_mark_node
13790 /* This is only worth doing for fns that return in memory--and
13791 simpler, since we don't have to worry about promoted modes. */
13792 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13793 /* Only allow this for variables declared in the outer scope of
13794 the function so we know that their lifetime always ends with a
13795 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13796 we were to do this optimization in tree-ssa. */
13797 && (outer
= outer_curly_brace_block (fndecl
))
13798 && chain_member (r
, BLOCK_VARS (outer
)))
13799 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13801 current_function_return_value
= NULL_TREE
;
13804 /* Remember that we were in class scope. */
13805 if (current_class_name
)
13806 ctype
= current_class_type
;
13808 /* Must mark the RESULT_DECL as being in this function. */
13809 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13811 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13812 to the FUNCTION_DECL node itself. */
13813 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13815 /* Save away current state, if appropriate. */
13816 if (!processing_template_decl
)
13817 save_function_data (fndecl
);
13819 /* Complain if there's just no return statement. */
13820 if (warn_return_type
13821 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13822 && !dependent_type_p (TREE_TYPE (fntype
))
13823 && !current_function_returns_value
&& !current_function_returns_null
13824 /* Don't complain if we abort or throw. */
13825 && !current_function_returns_abnormally
13826 /* Don't complain if we are declared noreturn. */
13827 && !TREE_THIS_VOLATILE (fndecl
)
13828 && !DECL_NAME (DECL_RESULT (fndecl
))
13829 && !TREE_NO_WARNING (fndecl
)
13830 /* Structor return values (if any) are set by the compiler. */
13831 && !DECL_CONSTRUCTOR_P (fndecl
)
13832 && !DECL_DESTRUCTOR_P (fndecl
)
13833 && targetm
.warn_func_return (fndecl
))
13835 warning (OPT_Wreturn_type
,
13836 "no return statement in function returning non-void");
13837 TREE_NO_WARNING (fndecl
) = 1;
13840 /* Store the end of the function, so that we get good line number
13841 info for the epilogue. */
13842 cfun
->function_end_locus
= input_location
;
13844 /* Complain about parameters that are only set, but never otherwise used. */
13845 if (warn_unused_but_set_parameter
13846 && !processing_template_decl
13847 && errorcount
== unused_but_set_errorcount
13848 && !DECL_CLONED_FUNCTION_P (fndecl
))
13852 for (decl
= DECL_ARGUMENTS (fndecl
);
13854 decl
= DECL_CHAIN (decl
))
13855 if (TREE_USED (decl
)
13856 && TREE_CODE (decl
) == PARM_DECL
13857 && !DECL_READ_P (decl
)
13858 && DECL_NAME (decl
)
13859 && !DECL_ARTIFICIAL (decl
)
13860 && !TREE_NO_WARNING (decl
)
13861 && !DECL_IN_SYSTEM_HEADER (decl
)
13862 && TREE_TYPE (decl
) != error_mark_node
13863 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13864 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13865 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13866 warning (OPT_Wunused_but_set_parameter
,
13867 "parameter %q+D set but not used", decl
);
13868 unused_but_set_errorcount
= errorcount
;
13871 /* Complain about locally defined typedefs that are not used in this
13873 maybe_warn_unused_local_typedefs ();
13875 /* Genericize before inlining. */
13876 if (!processing_template_decl
)
13878 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13879 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13880 cp_genericize (fndecl
);
13881 /* Clear out the bits we don't need. */
13882 f
->x_current_class_ptr
= NULL
;
13883 f
->x_current_class_ref
= NULL
;
13884 f
->x_eh_spec_block
= NULL
;
13885 f
->x_in_charge_parm
= NULL
;
13886 f
->x_vtt_parm
= NULL
;
13887 f
->x_return_value
= NULL
;
13888 f
->bindings
= NULL
;
13889 f
->extern_decl_map
= NULL
;
13891 /* Clear out the bits we don't need. */
13892 local_names
= NULL
;
13894 /* We're leaving the context of this function, so zap cfun. It's still in
13895 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13897 current_function_decl
= NULL
;
13899 /* If this is an in-class inline definition, we may have to pop the
13900 bindings for the template parameters that we added in
13901 maybe_begin_member_template_processing when start_function was
13903 if (inclass_inline
)
13904 maybe_end_member_template_processing ();
13906 /* Leave the scope of the class. */
13908 pop_nested_class ();
13913 current_function_decl
= NULL_TREE
;
13915 defer_mark_used_calls
= false;
13916 if (deferred_mark_used_calls
)
13921 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13923 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13929 /* Create the FUNCTION_DECL for a function definition.
13930 DECLSPECS and DECLARATOR are the parts of the declaration;
13931 they describe the return type and the name of the function,
13932 but twisted together in a fashion that parallels the syntax of C.
13934 This function creates a binding context for the function body
13935 as well as setting up the FUNCTION_DECL in current_function_decl.
13937 Returns a FUNCTION_DECL on success.
13939 If the DECLARATOR is not suitable for a function (it defines a datum
13940 instead), we return 0, which tells yyparse to report a parse error.
13942 May return void_type_node indicating that this method is actually
13943 a friend. See grokfield for more details.
13945 Came here with a `.pushlevel' .
13947 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13948 CHANGES TO CODE IN `grokfield'. */
13951 grokmethod (cp_decl_specifier_seq
*declspecs
,
13952 const cp_declarator
*declarator
, tree attrlist
)
13954 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13957 if (fndecl
== error_mark_node
)
13958 return error_mark_node
;
13960 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13962 error ("invalid member function declaration");
13963 return error_mark_node
;
13967 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13969 /* Pass friends other than inline friend functions back. */
13970 if (fndecl
== void_type_node
)
13973 if (DECL_IN_AGGR_P (fndecl
))
13975 if (DECL_CLASS_SCOPE_P (fndecl
))
13976 error ("%qD is already defined in class %qT", fndecl
,
13977 DECL_CONTEXT (fndecl
));
13978 return error_mark_node
;
13981 check_template_shadow (fndecl
);
13983 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13984 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13986 /* We process method specializations in finish_struct_1. */
13987 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13989 fndecl
= push_template_decl (fndecl
);
13990 if (fndecl
== error_mark_node
)
13994 if (! DECL_FRIEND_P (fndecl
))
13996 if (DECL_CHAIN (fndecl
))
13998 fndecl
= copy_node (fndecl
);
13999 TREE_CHAIN (fndecl
) = NULL_TREE
;
14003 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14005 DECL_IN_AGGR_P (fndecl
) = 1;
14010 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14011 we can lay it out later, when and if its type becomes complete. */
14014 maybe_register_incomplete_var (tree var
)
14016 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
14018 /* Keep track of variables with incomplete types. */
14019 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14020 && DECL_EXTERNAL (var
))
14022 tree inner_type
= TREE_TYPE (var
);
14024 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14025 inner_type
= TREE_TYPE (inner_type
);
14026 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14028 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14029 /* RTTI TD entries are created while defining the type_info. */
14030 || (TYPE_LANG_SPECIFIC (inner_type
)
14031 && TYPE_BEING_DEFINED (inner_type
)))
14033 incomplete_var iv
= {var
, inner_type
};
14034 VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, iv
);
14039 /* Called when a class type (given by TYPE) is defined. If there are
14040 any existing VAR_DECLs whose type has been completed by this
14041 declaration, update them now. */
14044 complete_vars (tree type
)
14047 incomplete_var
*iv
;
14049 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
14051 if (same_type_p (type
, iv
->incomplete_type
))
14053 tree var
= iv
->decl
;
14054 tree type
= TREE_TYPE (var
);
14055 /* Complete the type of the variable. The VAR_DECL itself
14056 will be laid out in expand_expr. */
14057 complete_type (type
);
14058 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14059 /* Remove this entry from the list. */
14060 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
14066 /* Check for pending declarations which may have abstract type. */
14067 complete_type_check_abstract (type
);
14070 /* If DECL is of a type which needs a cleanup, build and return an
14071 expression to perform that cleanup here. Return NULL_TREE if no
14072 cleanup need be done. */
14075 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14081 /* Assume no cleanup is required. */
14082 cleanup
= NULL_TREE
;
14084 if (error_operand_p (decl
))
14087 /* Handle "__attribute__((cleanup))". We run the cleanup function
14088 before the destructor since the destructor is what actually
14089 terminates the lifetime of the object. */
14090 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14097 /* Get the name specified by the user for the cleanup function. */
14098 id
= TREE_VALUE (TREE_VALUE (attr
));
14099 /* Look up the name to find the cleanup function to call. It is
14100 important to use lookup_name here because that is what is
14101 used in c-common.c:handle_cleanup_attribute when performing
14102 initial checks on the attribute. Note that those checks
14103 include ensuring that the function found is not an overloaded
14104 function, or an object with an overloaded call operator,
14105 etc.; we can rely on the fact that the function found is an
14106 ordinary FUNCTION_DECL. */
14107 fn
= lookup_name (id
);
14108 arg
= build_address (decl
);
14110 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14111 if (cleanup
== error_mark_node
)
14112 return error_mark_node
;
14114 /* Handle ordinary C++ destructors. */
14115 type
= TREE_TYPE (decl
);
14116 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
14118 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14119 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
14120 && CLASSTYPE_VBASECLASSES (type
));
14124 if (TREE_CODE (type
) == ARRAY_TYPE
)
14127 addr
= build_address (decl
);
14129 /* Optimize for space over speed here. */
14130 if (!has_vbases
|| flag_expensive_optimizations
)
14131 flags
|= LOOKUP_NONVIRTUAL
;
14133 call
= build_delete (TREE_TYPE (addr
), addr
,
14134 sfk_complete_destructor
, flags
, 0, complain
);
14135 if (call
== error_mark_node
)
14136 cleanup
= error_mark_node
;
14138 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14143 /* build_delete sets the location of the destructor call to the
14144 current location, even though the destructor is going to be
14145 called later, at the end of the current scope. This can lead to
14146 a "jumpy" behaviour for users of debuggers when they step around
14147 the end of the block. So let's unset the location of the
14148 destructor call instead. */
14149 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14150 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14155 /* When a stmt has been parsed, this function is called. */
14162 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14163 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14164 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14167 static_fn_type (tree memfntype
)
14172 if (TYPE_PTRMEMFUNC_P (memfntype
))
14173 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14174 if (POINTER_TYPE_P (memfntype
)
14175 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14176 memfntype
= TREE_TYPE (memfntype
);
14177 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14179 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14180 args
= TYPE_ARG_TYPES (memfntype
);
14181 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14182 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
14183 fntype
= (cp_build_type_attribute_variant
14184 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14185 fntype
= (build_exception_variant
14186 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14190 /* DECL was originally constructed as a non-static member function,
14191 but turned out to be static. Update it accordingly. */
14194 revert_static_member_fn (tree decl
)
14196 tree stype
= static_fn_type (decl
);
14197 cp_cv_quals quals
= type_memfn_quals (stype
);
14199 if (quals
!= TYPE_UNQUALIFIED
)
14200 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
14202 TREE_TYPE (decl
) = stype
;
14204 if (DECL_ARGUMENTS (decl
))
14205 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14206 DECL_STATIC_FUNCTION_P (decl
) = 1;
14209 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14210 one of the language-independent trees. */
14212 enum cp_tree_node_structure_enum
14213 cp_tree_node_structure (union lang_tree_node
* t
)
14215 switch (TREE_CODE (&t
->generic
))
14217 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14218 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14219 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14220 case OVERLOAD
: return TS_CP_OVERLOAD
;
14221 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14222 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14223 case BASELINK
: return TS_CP_BASELINK
;
14224 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14225 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14226 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14227 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14228 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14229 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14230 default: return TS_CP_GENERIC
;
14234 /* Build the void_list_node (void_type_node having been created). */
14236 build_void_list_node (void)
14238 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14243 cp_missing_noreturn_ok_p (tree decl
)
14245 /* A missing noreturn is ok for the `main' function. */
14246 return DECL_MAIN_P (decl
);
14249 /* Return the COMDAT group into which DECL should be placed. */
14252 cxx_comdat_group (tree decl
)
14256 /* Virtual tables, construction virtual tables, and virtual table
14257 tables all go in a single COMDAT group, named after the primary
14259 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
14260 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14261 /* For all other DECLs, the COMDAT group is the mangled name of the
14262 declaration itself. */
14265 while (DECL_THUNK_P (decl
))
14267 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14268 into the same section as the target function. In that case
14269 we must return target's name. */
14270 tree target
= THUNK_TARGET (decl
);
14271 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14272 && DECL_SECTION_NAME (target
) != NULL
14273 && DECL_ONE_ONLY (target
))
14278 name
= DECL_ASSEMBLER_NAME (decl
);
14284 #include "gt-cp-decl.h"