1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2013 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
36 #include "tree-iterator.h"
37 #include "tree-inline.h"
44 #include "c-family/c-common.h"
45 #include "c-family/c-objc.h"
46 #include "c-family/c-pragma.h"
47 #include "c-family/c-target.h"
48 #include "c-family/c-ubsan.h"
49 #include "diagnostic.h"
53 #include "pointer-set.h"
54 #include "splay-tree.h"
59 /* Possible cases of bad specifiers type used by bad_specifiers. */
61 BSP_VAR
, /* variable */
62 BSP_PARM
, /* parameter */
67 static tree
grokparms (tree parmlist
, tree
*);
68 static const char *redeclaration_error_message (tree
, tree
);
70 static int decl_jump_unsafe (tree
);
71 static void require_complete_types_for_parms (tree
);
72 static int ambi_op_p (enum tree_code
);
73 static int unary_op_p (enum tree_code
);
74 static void push_local_name (tree
);
75 static tree
grok_reference_init (tree
, tree
, tree
, int);
76 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
78 static int check_static_variable_definition (tree
, tree
);
79 static void record_unknown_type (tree
, const char *);
80 static tree
builtin_function_1 (tree
, tree
, bool);
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
, va_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
, int);
113 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
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
, va_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
, va_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
;
262 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
264 /* Returns the kind of template specialization we are currently
265 processing, given that it's declaration contained N_CLASS_SCOPES
266 explicit scope qualifications. */
269 current_tmpl_spec_kind (int n_class_scopes
)
271 int n_template_parm_scopes
= 0;
272 int seen_specialization_p
= 0;
273 int innermost_specialization_p
= 0;
276 /* Scan through the template parameter scopes. */
277 for (b
= current_binding_level
;
278 b
->kind
== sk_template_parms
;
281 /* If we see a specialization scope inside a parameter scope,
282 then something is wrong. That corresponds to a declaration
285 template <class T> template <> ...
287 which is always invalid since [temp.expl.spec] forbids the
288 specialization of a class member template if the enclosing
289 class templates are not explicitly specialized as well. */
290 if (b
->explicit_spec_p
)
292 if (n_template_parm_scopes
== 0)
293 innermost_specialization_p
= 1;
295 seen_specialization_p
= 1;
297 else if (seen_specialization_p
== 1)
298 return tsk_invalid_member_spec
;
300 ++n_template_parm_scopes
;
303 /* Handle explicit instantiations. */
304 if (processing_explicit_instantiation
)
306 if (n_template_parm_scopes
!= 0)
307 /* We've seen a template parameter list during an explicit
308 instantiation. For example:
310 template <class T> template void f(int);
312 This is erroneous. */
313 return tsk_invalid_expl_inst
;
315 return tsk_expl_inst
;
318 if (n_template_parm_scopes
< n_class_scopes
)
319 /* We've not seen enough template headers to match all the
320 specialized classes present. For example:
322 template <class T> void R<T>::S<T>::f(int);
324 This is invalid; there needs to be one set of template
325 parameters for each class. */
326 return tsk_insufficient_parms
;
327 else if (n_template_parm_scopes
== n_class_scopes
)
328 /* We're processing a non-template declaration (even though it may
329 be a member of a template class.) For example:
331 template <class T> void S<T>::f(int);
333 The `class T' matches the `S<T>', leaving no template headers
334 corresponding to the `f'. */
336 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
337 /* We've got too many template headers. For example:
339 template <> template <class T> void f (T);
341 There need to be more enclosing classes. */
342 return tsk_excessive_parms
;
344 /* This must be a template. It's of the form:
346 template <class T> template <class U> void S<T>::f(U);
348 This is a specialization if the innermost level was a
349 specialization; otherwise it's just a definition of the
351 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
354 /* Exit the current scope. */
362 /* When a label goes out of scope, check to see if that label was used
363 in a valid manner, and issue any appropriate warnings or errors. */
366 pop_label (tree label
, tree old_value
)
368 if (!processing_template_decl
)
370 if (DECL_INITIAL (label
) == NULL_TREE
)
374 error ("label %q+D used but not defined", label
);
375 location
= input_location
; /* FIXME want (input_filename, (line)0) */
376 /* Avoid crashing later. */
377 define_label (location
, DECL_NAME (label
));
380 warn_for_unused_label (label
);
383 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
386 /* At the end of a function, all labels declared within the function
387 go out of scope. BLOCK is the top-level block for the
391 pop_labels_1 (void **slot
, void *data
)
393 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
394 tree block
= (tree
) data
;
396 pop_label (ent
->label_decl
, NULL_TREE
);
398 /* Put the labels into the "variables" of the top-level block,
399 so debugger can see them. */
400 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
401 BLOCK_VARS (block
) = ent
->label_decl
;
403 htab_clear_slot (named_labels
, slot
);
409 pop_labels (tree block
)
413 htab_traverse (named_labels
, pop_labels_1
, block
);
418 /* At the end of a block with local labels, restore the outer definition. */
421 pop_local_label (tree label
, tree old_value
)
423 struct named_label_entry dummy
;
426 pop_label (label
, old_value
);
428 dummy
.label_decl
= label
;
429 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
430 htab_clear_slot (named_labels
, slot
);
433 /* The following two routines are used to interface to Objective-C++.
434 The binding level is purposely treated as an opaque type. */
437 objc_get_current_scope (void)
439 return current_binding_level
;
442 /* The following routine is used by the NeXT-style SJLJ exceptions;
443 variables get marked 'volatile' so as to not be clobbered by
444 _setjmp()/_longjmp() calls. All variables in the current scope,
445 as well as parent scopes up to (but not including) ENCLOSING_BLK
446 shall be thusly marked. */
449 objc_mark_locals_volatile (void *enclosing_blk
)
451 cp_binding_level
*scope
;
453 for (scope
= current_binding_level
;
454 scope
&& scope
!= enclosing_blk
;
455 scope
= scope
->level_chain
)
459 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
460 objc_volatilize_decl (decl
);
462 /* Do not climb up past the current function. */
463 if (scope
->kind
== sk_function_parms
)
468 /* Update data for defined and undefined labels when leaving a scope. */
471 poplevel_named_label_1 (void **slot
, void *data
)
473 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
474 cp_binding_level
*bl
= (cp_binding_level
*) data
;
475 cp_binding_level
*obl
= bl
->level_chain
;
477 if (ent
->binding_level
== bl
)
481 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
482 TREE_LISTs representing OVERLOADs, so be careful. */
483 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
485 : TREE_CHAIN (decl
)))
486 if (decl_jump_unsafe (decl
))
487 vec_safe_push (ent
->bad_decls
, decl
);
489 ent
->binding_level
= obl
;
490 ent
->names_in_scope
= obl
->names
;
494 ent
->in_try_scope
= true;
497 ent
->in_catch_scope
= true;
500 ent
->in_omp_scope
= true;
508 struct named_label_use_entry
*use
;
510 for (use
= ent
->uses
; use
; use
= use
->next
)
511 if (use
->binding_level
== bl
)
513 use
->binding_level
= obl
;
514 use
->names_in_scope
= obl
->names
;
515 if (bl
->kind
== sk_omp
)
516 use
->in_omp_scope
= true;
523 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
524 when errors were reported, except for -Werror-unused-but-set-*. */
525 static int unused_but_set_errorcount
;
527 /* Exit a binding level.
528 Pop the level off, and restore the state of the identifier-decl mappings
529 that were in effect when this level was entered.
531 If KEEP == 1, this level had explicit declarations, so
532 and create a "block" (a BLOCK node) for the level
533 to record its declarations and subblocks for symbol table output.
535 If FUNCTIONBODY is nonzero, this level is the body of a function,
536 so create a block as if KEEP were set and also clear out all
539 If REVERSE is nonzero, reverse the order of decls before putting
540 them into the BLOCK. */
543 poplevel (int keep
, int reverse
, int functionbody
)
546 /* The chain of decls was accumulated in reverse order.
547 Put it into forward order, just for cleanliness. */
552 int leaving_for_scope
;
555 cp_label_binding
*label_bind
;
557 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
562 gcc_assert (current_binding_level
->kind
!= sk_class
);
564 if (current_binding_level
->kind
== sk_cleanup
)
566 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
568 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
570 /* We used to use KEEP == 2 to indicate that the new block should go
571 at the beginning of the list of blocks at this binding level,
572 rather than the end. This hack is no longer used. */
573 gcc_assert (keep
== 0 || keep
== 1);
575 if (current_binding_level
->keep
)
578 /* Any uses of undefined labels, and any defined labels, now operate
579 under constraints of next binding contour. */
580 if (cfun
&& !functionbody
&& named_labels
)
581 htab_traverse (named_labels
, poplevel_named_label_1
,
582 current_binding_level
);
584 /* Get the decls in the order they were written.
585 Usually current_binding_level->names is in reverse order.
586 But parameter decls were previously put in forward order. */
589 current_binding_level
->names
590 = decls
= nreverse (current_binding_level
->names
);
592 decls
= current_binding_level
->names
;
594 /* If there were any declarations or structure tags in that level,
595 or if this level is a function body,
596 create a BLOCK to record them for the life of this function. */
598 if (keep
== 1 || functionbody
)
599 block
= make_node (BLOCK
);
600 if (block
!= NULL_TREE
)
602 BLOCK_VARS (block
) = decls
;
603 BLOCK_SUBBLOCKS (block
) = subblocks
;
606 /* In each subblock, record that this is its superior. */
608 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
609 BLOCK_SUPERCONTEXT (link
) = block
;
611 /* We still support the old for-scope rules, whereby the variables
612 in a for-init statement were in scope after the for-statement
613 ended. We only use the new rules if flag_new_for_scope is
616 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
618 /* Before we remove the declarations first check for unused variables. */
619 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
620 && !processing_template_decl
)
621 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
623 /* There are cases where D itself is a TREE_LIST. See in
624 push_local_binding where the list of decls returned by
625 getdecls is built. */
626 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
627 // See through references for improved -Wunused-variable (PR 38958).
628 tree type
= non_reference (TREE_TYPE (decl
));
630 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
631 && ! DECL_IN_SYSTEM_HEADER (decl
)
632 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
633 && type
!= error_mark_node
634 && (!CLASS_TYPE_P (type
)
635 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
636 || lookup_attribute ("warn_unused",
637 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
639 if (! TREE_USED (decl
))
640 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
641 else if (DECL_CONTEXT (decl
) == current_function_decl
642 // For -Wunused-but-set-variable leave references alone.
643 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
644 && errorcount
== unused_but_set_errorcount
)
646 warning (OPT_Wunused_but_set_variable
,
647 "variable %q+D set but not used", decl
);
648 unused_but_set_errorcount
= errorcount
;
653 /* Remove declarations for all the DECLs in this level. */
654 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
656 if (leaving_for_scope
&& VAR_P (link
)
657 /* It's hard to make this ARM compatibility hack play nicely with
658 lambdas, and it really isn't necessary in C++11 mode. */
659 && cxx_dialect
< cxx11
662 tree name
= DECL_NAME (link
);
666 ob
= outer_binding (name
,
667 IDENTIFIER_BINDING (name
),
670 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
672 ns_binding
= NULL_TREE
;
674 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
675 /* We have something like:
680 and we are leaving the `for' scope. There's no reason to
681 keep the binding of the inner `i' in this case. */
682 pop_binding (name
, link
);
683 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
684 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
685 /* Here, we have something like:
693 We must pop the for-scope binding so we know what's a
694 type and what isn't. */
695 pop_binding (name
, link
);
698 /* Mark this VAR_DECL as dead so that we can tell we left it
699 there only for backward compatibility. */
700 DECL_DEAD_FOR_LOCAL (link
) = 1;
702 /* Keep track of what should have happened when we
703 popped the binding. */
706 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
707 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
710 /* Add it to the list of dead variables in the next
711 outermost binding to that we can remove these when we
712 leave that binding. */
714 current_binding_level
->level_chain
->dead_vars_from_for
,
717 /* Although we don't pop the cxx_binding, we do clear
718 its SCOPE since the scope is going away now. */
719 IDENTIFIER_BINDING (name
)->scope
720 = current_binding_level
->level_chain
;
727 /* Remove the binding. */
730 if (TREE_CODE (decl
) == TREE_LIST
)
731 decl
= TREE_VALUE (decl
);
734 if (TREE_CODE (name
) == OVERLOAD
)
735 name
= OVL_FUNCTION (name
);
737 gcc_assert (DECL_P (name
));
738 pop_binding (DECL_NAME (name
), decl
);
742 /* Remove declarations for any `for' variables from inner scopes
743 that we kept around. */
744 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
746 pop_binding (DECL_NAME (decl
), decl
);
748 /* Restore the IDENTIFIER_TYPE_VALUEs. */
749 for (link
= current_binding_level
->type_shadowed
;
750 link
; link
= TREE_CHAIN (link
))
751 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
753 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
754 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
756 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
758 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
759 list if a `using' declaration put them there. The debugging
760 back ends won't understand OVERLOAD, so we remove them here.
761 Because the BLOCK_VARS are (temporarily) shared with
762 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
763 popped all the bindings. */
768 for (d
= &BLOCK_VARS (block
); *d
; )
770 if (TREE_CODE (*d
) == TREE_LIST
)
771 *d
= TREE_CHAIN (*d
);
773 d
= &DECL_CHAIN (*d
);
777 /* If the level being exited is the top level of a function,
778 check over all the labels. */
781 /* Since this is the top level block of a function, the vars are
782 the function's parameters. Don't leave them in the BLOCK
783 because they are found in the FUNCTION_DECL instead. */
784 BLOCK_VARS (block
) = 0;
788 kind
= current_binding_level
->kind
;
789 if (kind
== sk_cleanup
)
793 /* If this is a temporary binding created for a cleanup, then we'll
794 have pushed a statement list level. Pop that, create a new
795 BIND_EXPR for the block, and insert it into the stream. */
796 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
797 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
804 /* The current function is being defined, so its DECL_INITIAL
805 should be error_mark_node. */
806 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
807 DECL_INITIAL (current_function_decl
) = block
;
810 current_binding_level
->blocks
811 = block_chainon (current_binding_level
->blocks
, block
);
813 /* If we did not make a block for the level just exited,
814 any blocks made for inner levels
815 (since they cannot be recorded as subblocks in that level)
816 must be carried forward so they will later become subblocks
817 of something else. */
819 current_binding_level
->blocks
820 = block_chainon (current_binding_level
->blocks
, subblocks
);
822 /* Each and every BLOCK node created here in `poplevel' is important
823 (e.g. for proper debugging information) so if we created one
824 earlier, mark it as "used". */
826 TREE_USED (block
) = 1;
828 /* All temporary bindings created for cleanups are popped silently. */
829 if (kind
== sk_cleanup
)
832 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
836 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
837 itself, calling F for each. The DATA is passed to F as well. */
840 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
843 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
845 result
|= (*f
) (name_space
, data
);
847 for (; current
; current
= DECL_CHAIN (current
))
848 result
|= walk_namespaces_r (current
, f
, data
);
853 /* Walk all the namespaces, calling F for each. The DATA is passed to
857 walk_namespaces (walk_namespaces_fn f
, void* data
)
859 return walk_namespaces_r (global_namespace
, f
, data
);
862 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
863 DATA is non-NULL, this is the last time we will call
864 wrapup_global_declarations for this NAMESPACE. */
867 wrapup_globals_for_namespace (tree name_space
, void* data
)
869 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
870 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
871 tree
*vec
= statics
->address ();
872 int len
= statics
->length ();
873 int last_time
= (data
!= 0);
877 check_global_declarations (vec
, len
);
878 emit_debug_global_declarations (vec
, len
);
882 /* Write out any globals that need to be output. */
883 return wrapup_global_declarations (vec
, len
);
887 /* In C++, you don't have to write `struct S' to refer to `S'; you
888 can just use `S'. We accomplish this by creating a TYPE_DECL as
889 if the user had written `typedef struct S S'. Create and return
890 the TYPE_DECL for TYPE. */
893 create_implicit_typedef (tree name
, tree type
)
897 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
898 DECL_ARTIFICIAL (decl
) = 1;
899 /* There are other implicit type declarations, like the one *within*
900 a class that allows you to write `S::S'. We must distinguish
902 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
903 TYPE_NAME (type
) = decl
;
904 TYPE_STUB_DECL (type
) = decl
;
909 /* Remember a local name for name-mangling purposes. */
912 push_local_name (tree decl
)
917 timevar_start (TV_NAME_LOOKUP
);
919 name
= DECL_NAME (decl
);
921 nelts
= vec_safe_length (local_names
);
922 for (i
= 0; i
< nelts
; i
++)
924 t
= (*local_names
)[i
];
925 if (DECL_NAME (t
) == name
)
927 if (!DECL_LANG_SPECIFIC (decl
))
928 retrofit_lang_decl (decl
);
929 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
930 if (DECL_DISCRIMINATOR_SET_P (t
))
931 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
933 DECL_DISCRIMINATOR (decl
) = 1;
935 (*local_names
)[i
] = decl
;
936 timevar_stop (TV_NAME_LOOKUP
);
941 vec_safe_push (local_names
, decl
);
942 timevar_stop (TV_NAME_LOOKUP
);
945 /* Subroutine of duplicate_decls: return truthvalue of whether
946 or not types of these decls match.
948 For C++, we must compare the parameter list so that `int' can match
949 `int&' in a parameter position, but `int&' is not confused with
953 decls_match (tree newdecl
, tree olddecl
)
957 if (newdecl
== olddecl
)
960 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
961 /* If the two DECLs are not even the same kind of thing, we're not
962 interested in their types. */
965 gcc_assert (DECL_P (newdecl
));
967 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
969 tree f1
= TREE_TYPE (newdecl
);
970 tree f2
= TREE_TYPE (olddecl
);
971 tree p1
= TYPE_ARG_TYPES (f1
);
972 tree p2
= TYPE_ARG_TYPES (f2
);
975 /* Specializations of different templates are different functions
976 even if they have the same type. */
977 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
978 ? DECL_TI_TEMPLATE (newdecl
)
980 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
981 ? DECL_TI_TEMPLATE (olddecl
)
986 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
987 && ! (DECL_EXTERN_C_P (newdecl
)
988 && DECL_EXTERN_C_P (olddecl
)))
991 /* A new declaration doesn't match a built-in one unless it
992 is also extern "C". */
993 if (DECL_IS_BUILTIN (olddecl
)
994 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
997 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1000 /* A declaration with deduced return type should use its pre-deduction
1001 type for declaration matching. */
1002 r2
= fndecl_declared_return_type (olddecl
);
1004 if (same_type_p (TREE_TYPE (f1
), r2
))
1006 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1007 && (DECL_BUILT_IN (olddecl
)
1008 #ifndef NO_IMPLICIT_EXTERN_C
1009 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1010 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1014 types_match
= self_promoting_args_p (p1
);
1015 if (p1
== void_list_node
)
1016 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1018 #ifndef NO_IMPLICIT_EXTERN_C
1019 else if (!prototype_p (f1
)
1020 && (DECL_EXTERN_C_P (olddecl
)
1021 && DECL_IN_SYSTEM_HEADER (olddecl
)
1022 && !DECL_CLASS_SCOPE_P (olddecl
))
1023 && (DECL_EXTERN_C_P (newdecl
)
1024 && DECL_IN_SYSTEM_HEADER (newdecl
)
1025 && !DECL_CLASS_SCOPE_P (newdecl
)))
1027 types_match
= self_promoting_args_p (p2
);
1028 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1034 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1035 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1036 || comp_type_attributes (TREE_TYPE (newdecl
),
1037 TREE_TYPE (olddecl
)) != 0);
1042 /* The decls dont match if they correspond to two different versions
1043 of the same function. Disallow extern "C" functions to be
1044 versions for now. */
1046 && !DECL_EXTERN_C_P (newdecl
)
1047 && !DECL_EXTERN_C_P (olddecl
)
1048 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1050 /* Mark functions as versions if necessary. Modify the mangled decl
1051 name if necessary. */
1052 if (DECL_FUNCTION_VERSIONED (newdecl
)
1053 && DECL_FUNCTION_VERSIONED (olddecl
))
1055 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1057 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1058 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1059 mangle_decl (newdecl
);
1061 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1063 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1064 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1065 mangle_decl (olddecl
);
1067 record_function_versions (olddecl
, newdecl
);
1071 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1073 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1074 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1077 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1078 DECL_TEMPLATE_PARMS (olddecl
)))
1081 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1082 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1083 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1085 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1086 DECL_TEMPLATE_RESULT (newdecl
));
1090 /* Need to check scope for variable declaration (VAR_DECL).
1091 For typedef (TYPE_DECL), scope is ignored. */
1093 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1095 Two declarations for an object with C language linkage
1096 with the same name (ignoring the namespace that qualify
1097 it) that appear in different namespace scopes refer to
1099 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1102 if (TREE_TYPE (newdecl
) == error_mark_node
)
1103 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1104 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1105 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1106 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1109 types_match
= comptypes (TREE_TYPE (newdecl
),
1110 TREE_TYPE (olddecl
),
1111 COMPARE_REDECLARATION
);
1117 /* If NEWDECL is `static' and an `extern' was seen previously,
1118 warn about it. OLDDECL is the previous declaration.
1120 Note that this does not apply to the C++ case of declaring
1121 a variable `extern const' and then later `const'.
1123 Don't complain about built-in functions, since they are beyond
1124 the user's control. */
1127 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1129 if (TREE_CODE (newdecl
) == TYPE_DECL
1130 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1131 || TREE_CODE (newdecl
) == CONST_DECL
1132 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1135 /* Don't get confused by static member functions; that's a different
1137 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1138 && DECL_STATIC_FUNCTION_P (newdecl
))
1141 /* If the old declaration was `static', or the new one isn't, then
1142 everything is OK. */
1143 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1146 /* It's OK to declare a builtin function as `static'. */
1147 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1148 && DECL_ARTIFICIAL (olddecl
))
1151 if (permerror (input_location
,
1152 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1153 inform (input_location
, "previous declaration of %q+D", olddecl
);
1156 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1157 function templates. If their exception specifications do not
1158 match, issue a diagnostic. */
1161 check_redeclaration_exception_specification (tree new_decl
,
1166 tree new_exceptions
;
1167 tree old_exceptions
;
1169 new_type
= TREE_TYPE (new_decl
);
1170 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1171 old_type
= TREE_TYPE (old_decl
);
1172 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1176 If any declaration of a function has an exception-specification,
1177 all declarations, including the definition and an explicit
1178 specialization, of that function shall have an
1179 exception-specification with the same set of type-ids. */
1180 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1181 && ! DECL_IS_BUILTIN (old_decl
)
1183 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1185 error ("declaration of %qF has a different exception specifier",
1187 error ("from previous declaration %q+F", old_decl
);
1191 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1192 Otherwise issue diagnostics. */
1195 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1197 old_decl
= STRIP_TEMPLATE (old_decl
);
1198 new_decl
= STRIP_TEMPLATE (new_decl
);
1199 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1200 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1202 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1203 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1205 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1207 if (DECL_BUILT_IN (old_decl
))
1209 /* Hide a built-in declaration. */
1210 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1211 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1214 /* 7.1.5 [dcl.constexpr]
1215 Note: An explicit specialization can differ from the template
1216 declaration with respect to the constexpr specifier. */
1217 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1218 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1221 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1222 error ("from previous declaration %q+D", old_decl
);
1226 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1227 && lookup_attribute ("gnu_inline", \
1228 DECL_ATTRIBUTES (fn)))
1230 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1231 If the redeclaration is invalid, a diagnostic is issued, and the
1232 error_mark_node is returned. Otherwise, OLDDECL is returned.
1234 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1237 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1240 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1242 unsigned olddecl_uid
= DECL_UID (olddecl
);
1243 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1244 int new_defines_function
= 0;
1245 tree new_template_info
;
1247 if (newdecl
== olddecl
)
1250 types_match
= decls_match (newdecl
, olddecl
);
1252 /* If either the type of the new decl or the type of the old decl is an
1253 error_mark_node, then that implies that we have already issued an
1254 error (earlier) for some bogus type specification, and in that case,
1255 it is rather pointless to harass the user with yet more error message
1256 about the same declaration, so just pretend the types match here. */
1257 if (TREE_TYPE (newdecl
) == error_mark_node
1258 || TREE_TYPE (olddecl
) == error_mark_node
)
1259 return error_mark_node
;
1261 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1262 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1264 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1265 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1266 && check_raw_literal_operator (olddecl
))
1267 error ("literal operator template %q+D conflicts with"
1268 " raw literal operator %qD", newdecl
, olddecl
);
1269 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1270 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1271 && check_raw_literal_operator (newdecl
))
1272 error ("raw literal operator %q+D conflicts with"
1273 " literal operator template %qD", newdecl
, olddecl
);
1276 if (DECL_P (olddecl
)
1277 && TREE_CODE (newdecl
) == FUNCTION_DECL
1278 && TREE_CODE (olddecl
) == FUNCTION_DECL
1279 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1281 if (DECL_DECLARED_INLINE_P (newdecl
)
1282 && DECL_UNINLINABLE (newdecl
)
1283 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1284 /* Already warned elsewhere. */;
1285 else if (DECL_DECLARED_INLINE_P (olddecl
)
1286 && DECL_UNINLINABLE (olddecl
)
1287 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1288 /* Already warned. */;
1289 else if (DECL_DECLARED_INLINE_P (newdecl
)
1290 && DECL_UNINLINABLE (olddecl
)
1291 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1293 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1295 inform (input_location
, "previous declaration of %q+D "
1296 "with attribute noinline", olddecl
);
1298 else if (DECL_DECLARED_INLINE_P (olddecl
)
1299 && DECL_UNINLINABLE (newdecl
)
1300 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1302 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1303 "attribute noinline", newdecl
))
1304 inform (input_location
, "previous declaration of %q+D was inline",
1309 /* Check for redeclaration and other discrepancies. */
1310 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1311 && DECL_ARTIFICIAL (olddecl
))
1313 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1314 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1316 /* Avoid warnings redeclaring built-ins which have not been
1317 explicitly declared. */
1318 if (DECL_ANTICIPATED (olddecl
))
1321 /* If you declare a built-in or predefined function name as static,
1322 the old definition is overridden, but optionally warn this was a
1323 bad choice of name. */
1324 if (! TREE_PUBLIC (newdecl
))
1326 warning (OPT_Wshadow
,
1327 DECL_BUILT_IN (olddecl
)
1328 ? G_("shadowing built-in function %q#D")
1329 : G_("shadowing library function %q#D"), olddecl
);
1330 /* Discard the old built-in function. */
1333 /* If the built-in is not ansi, then programs can override
1334 it even globally without an error. */
1335 else if (! DECL_BUILT_IN (olddecl
))
1336 warning (0, "library function %q#D redeclared as non-function %q#D",
1340 error ("declaration of %q#D", newdecl
);
1341 error ("conflicts with built-in declaration %q#D",
1346 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1348 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1349 error_at (DECL_SOURCE_LOCATION (newdecl
),
1350 "redeclaration of %<pragma omp declare reduction%>");
1351 error_at (DECL_SOURCE_LOCATION (olddecl
),
1352 "previous %<pragma omp declare reduction%> declaration");
1353 return error_mark_node
;
1355 else if (!types_match
)
1357 /* Avoid warnings redeclaring built-ins which have not been
1358 explicitly declared. */
1359 if (DECL_ANTICIPATED (olddecl
))
1361 /* Deal with fileptr_type_node. FILE type is not known
1362 at the time we create the builtins. */
1365 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1366 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1368 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1371 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1373 tree t
= TREE_VALUE (t1
);
1376 && TYPE_NAME (TREE_TYPE (t
))
1377 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1378 == get_identifier ("FILE")
1379 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1381 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1383 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1384 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1385 types_match
= decls_match (newdecl
, olddecl
);
1387 return duplicate_decls (newdecl
, olddecl
,
1389 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1392 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1395 else if ((DECL_EXTERN_C_P (newdecl
)
1396 && DECL_EXTERN_C_P (olddecl
))
1397 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1398 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1400 /* A near match; override the builtin. */
1402 if (TREE_PUBLIC (newdecl
))
1404 warning (0, "new declaration %q#D", newdecl
);
1405 warning (0, "ambiguates built-in declaration %q#D",
1409 warning (OPT_Wshadow
,
1410 DECL_BUILT_IN (olddecl
)
1411 ? G_("shadowing built-in function %q#D")
1412 : G_("shadowing library function %q#D"), olddecl
);
1415 /* Discard the old built-in function. */
1418 /* Replace the old RTL to avoid problems with inlining. */
1419 COPY_DECL_RTL (newdecl
, olddecl
);
1421 /* Even if the types match, prefer the new declarations type for
1422 built-ins which have not been explicitly declared, for
1423 exception lists, etc... */
1424 else if (DECL_IS_BUILTIN (olddecl
))
1426 tree type
= TREE_TYPE (newdecl
);
1427 tree attribs
= (*targetm
.merge_type_attributes
)
1428 (TREE_TYPE (olddecl
), type
);
1430 type
= cp_build_type_attribute_variant (type
, attribs
);
1431 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1434 /* If a function is explicitly declared "throw ()", propagate that to
1435 the corresponding builtin. */
1436 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1437 && DECL_ANTICIPATED (olddecl
)
1438 && TREE_NOTHROW (newdecl
)
1439 && !TREE_NOTHROW (olddecl
))
1441 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1442 tree tmpdecl
= builtin_decl_explicit (fncode
);
1443 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1444 TREE_NOTHROW (tmpdecl
) = 1;
1447 /* Whether or not the builtin can throw exceptions has no
1448 bearing on this declarator. */
1449 TREE_NOTHROW (olddecl
) = 0;
1451 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1453 /* If a builtin function is redeclared as `static', merge
1454 the declarations, but make the original one static. */
1455 DECL_THIS_STATIC (olddecl
) = 1;
1456 TREE_PUBLIC (olddecl
) = 0;
1458 /* Make the old declaration consistent with the new one so
1459 that all remnants of the builtin-ness of this function
1460 will be banished. */
1461 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1462 COPY_DECL_RTL (newdecl
, olddecl
);
1465 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1467 /* C++ Standard, 3.3, clause 4:
1468 "[Note: a namespace name or a class template name must be unique
1469 in its declarative region (7.3.2, clause 14). ]" */
1470 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1471 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1472 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1473 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1474 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1475 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1477 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1478 && TREE_CODE (newdecl
) != TYPE_DECL
)
1479 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1480 && TREE_CODE (olddecl
) != TYPE_DECL
))
1482 /* We do nothing special here, because C++ does such nasty
1483 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1484 get shadowed, and know that if we need to find a TYPE_DECL
1485 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1486 slot of the identifier. */
1490 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1491 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1492 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1493 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1497 error ("%q#D redeclared as different kind of symbol", newdecl
);
1498 if (TREE_CODE (olddecl
) == TREE_LIST
)
1499 olddecl
= TREE_VALUE (olddecl
);
1500 inform (input_location
, "previous declaration of %q+#D", olddecl
);
1502 return error_mark_node
;
1504 else if (!types_match
)
1506 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1507 /* These are certainly not duplicate declarations; they're
1508 from different scopes. */
1511 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1513 /* The name of a class template may not be declared to refer to
1514 any other template, class, function, object, namespace, value,
1515 or type in the same scope. */
1516 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1517 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1519 error ("declaration of template %q#D", newdecl
);
1520 error ("conflicts with previous declaration %q+#D", olddecl
);
1521 return error_mark_node
;
1523 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1524 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1525 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1526 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1527 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1528 DECL_TEMPLATE_PARMS (olddecl
))
1529 /* Template functions can be disambiguated by
1531 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1532 TREE_TYPE (TREE_TYPE (olddecl
))))
1534 error ("new declaration %q#D", newdecl
);
1535 error ("ambiguates old declaration %q+#D", olddecl
);
1539 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1541 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1543 error ("declaration of C function %q#D conflicts with",
1545 error ("previous declaration %q+#D here", olddecl
);
1548 /* For function versions, params and types match, but they
1549 are not ambiguous. */
1550 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1551 && !DECL_FUNCTION_VERSIONED (olddecl
))
1552 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1553 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1555 error ("new declaration %q#D", newdecl
);
1556 error ("ambiguates old declaration %q+#D", olddecl
);
1557 return error_mark_node
;
1564 error ("conflicting declaration %q#D", newdecl
);
1565 inform (input_location
,
1566 "%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1567 return error_mark_node
;
1570 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1571 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1572 && (!DECL_TEMPLATE_INFO (newdecl
)
1573 || (DECL_TI_TEMPLATE (newdecl
)
1574 != DECL_TI_TEMPLATE (olddecl
))))
1575 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1576 && (!DECL_TEMPLATE_INFO (olddecl
)
1577 || (DECL_TI_TEMPLATE (olddecl
)
1578 != DECL_TI_TEMPLATE (newdecl
))))))
1579 /* It's OK to have a template specialization and a non-template
1580 with the same type, or to have specializations of two
1581 different templates with the same type. Note that if one is a
1582 specialization, and the other is an instantiation of the same
1583 template, that we do not exit at this point. That situation
1584 can occur if we instantiate a template class, and then
1585 specialize one of its methods. This situation is valid, but
1586 the declarations must be merged in the usual way. */
1588 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1589 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1590 && !DECL_USE_TEMPLATE (newdecl
))
1591 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1592 && !DECL_USE_TEMPLATE (olddecl
))))
1593 /* One of the declarations is a template instantiation, and the
1594 other is not a template at all. That's OK. */
1596 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1598 /* In [namespace.alias] we have:
1600 In a declarative region, a namespace-alias-definition can be
1601 used to redefine a namespace-alias declared in that declarative
1602 region to refer only to the namespace to which it already
1605 Therefore, if we encounter a second alias directive for the same
1606 alias, we can just ignore the second directive. */
1607 if (DECL_NAMESPACE_ALIAS (newdecl
)
1608 && (DECL_NAMESPACE_ALIAS (newdecl
)
1609 == DECL_NAMESPACE_ALIAS (olddecl
)))
1611 /* [namespace.alias]
1613 A namespace-name or namespace-alias shall not be declared as
1614 the name of any other entity in the same declarative region.
1615 A namespace-name defined at global scope shall not be
1616 declared as the name of any other entity in any global scope
1618 error ("declaration of namespace %qD conflicts with", newdecl
);
1619 error ("previous declaration of namespace %q+D here", olddecl
);
1620 return error_mark_node
;
1624 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1627 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1628 if (DECL_NAME (olddecl
) != NULL_TREE
)
1629 inform (input_location
,
1630 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1631 ? G_("%q+#D previously defined here")
1632 : G_("%q+#D previously declared here"), olddecl
);
1633 return error_mark_node
;
1635 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1636 && DECL_INITIAL (olddecl
) != NULL_TREE
1637 && !prototype_p (TREE_TYPE (olddecl
))
1638 && prototype_p (TREE_TYPE (newdecl
)))
1640 /* Prototype decl follows defn w/o prototype. */
1641 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1642 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1643 "follows non-prototype definition here");
1645 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1646 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1649 If two declarations of the same function or object
1650 specify different linkage-specifications ..., the program
1651 is ill-formed.... Except for functions with C++ linkage,
1652 a function declaration without a linkage specification
1653 shall not precede the first linkage specification for
1654 that function. A function can be declared without a
1655 linkage specification after an explicit linkage
1656 specification has been seen; the linkage explicitly
1657 specified in the earlier declaration is not affected by
1658 such a function declaration.
1660 DR 563 raises the question why the restrictions on
1661 functions should not also apply to objects. Older
1662 versions of G++ silently ignore the linkage-specification
1670 which is clearly wrong. Therefore, we now treat objects
1672 if (current_lang_depth () == 0)
1674 /* There is no explicit linkage-specification, so we use
1675 the linkage from the previous declaration. */
1676 if (!DECL_LANG_SPECIFIC (newdecl
))
1677 retrofit_lang_decl (newdecl
);
1678 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1682 error ("previous declaration of %q+#D with %qL linkage",
1683 olddecl
, DECL_LANGUAGE (olddecl
));
1684 error ("conflicts with new declaration with %qL linkage",
1685 DECL_LANGUAGE (newdecl
));
1689 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1691 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1693 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1694 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1697 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1698 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1700 for (; t1
&& t1
!= void_list_node
;
1701 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1702 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1704 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1707 permerror (input_location
, "default argument given for parameter %d of %q#D",
1709 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1713 error ("default argument given for parameter %d of %q#D",
1715 error ("after previous specification in %q+#D",
1722 /* Do not merge an implicit typedef with an explicit one. In:
1726 typedef class A A __attribute__ ((foo));
1728 the attribute should apply only to the typedef. */
1729 if (TREE_CODE (olddecl
) == TYPE_DECL
1730 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1731 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1734 /* If new decl is `static' and an `extern' was seen previously,
1736 warn_extern_redeclared_static (newdecl
, olddecl
);
1738 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1739 return error_mark_node
;
1741 /* We have committed to returning 1 at this point. */
1742 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1744 /* Now that functions must hold information normally held
1745 by field decls, there is extra work to do so that
1746 declaration information does not get destroyed during
1748 if (DECL_VINDEX (olddecl
))
1749 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1750 if (DECL_CONTEXT (olddecl
))
1751 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1752 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1753 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1754 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1755 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1756 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1757 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1758 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1759 SET_OVERLOADED_OPERATOR_CODE
1760 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1761 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1763 /* Optionally warn about more than one declaration for the same
1764 name, but don't warn about a function declaration followed by a
1766 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1767 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1768 /* Don't warn about extern decl followed by definition. */
1769 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1770 /* Don't warn about friends, let add_friend take care of it. */
1771 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1772 /* Don't warn about declaration followed by specialization. */
1773 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1774 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1776 if (warning (OPT_Wredundant_decls
,
1777 "redundant redeclaration of %qD in same scope",
1779 inform (input_location
, "previous declaration of %q+D", olddecl
);
1782 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1783 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1785 if (DECL_DELETED_FN (newdecl
))
1787 error ("deleted definition of %qD", newdecl
);
1788 error ("after previous declaration %q+D", olddecl
);
1790 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1794 /* Deal with C++: must preserve virtual function table size. */
1795 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1797 tree newtype
= TREE_TYPE (newdecl
);
1798 tree oldtype
= TREE_TYPE (olddecl
);
1800 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1801 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1802 CLASSTYPE_FRIEND_CLASSES (newtype
)
1803 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1805 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1808 /* Copy all the DECL_... slots specified in the new decl
1809 except for any that we copy here from the old type. */
1810 DECL_ATTRIBUTES (newdecl
)
1811 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1813 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1817 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1818 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1819 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1820 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1821 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1822 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1824 DECL_ATTRIBUTES (old_result
)
1825 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1827 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1829 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1830 && DECL_INITIAL (new_result
))
1832 if (DECL_INITIAL (old_result
))
1833 DECL_UNINLINABLE (old_result
) = 1;
1835 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1836 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1837 DECL_NOT_REALLY_EXTERN (old_result
)
1838 = DECL_NOT_REALLY_EXTERN (new_result
);
1839 DECL_INTERFACE_KNOWN (old_result
)
1840 = DECL_INTERFACE_KNOWN (new_result
);
1841 DECL_DECLARED_INLINE_P (old_result
)
1842 = DECL_DECLARED_INLINE_P (new_result
);
1843 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1844 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1849 DECL_DECLARED_INLINE_P (old_result
)
1850 |= DECL_DECLARED_INLINE_P (new_result
);
1851 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1852 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1853 check_redeclaration_exception_specification (newdecl
, olddecl
);
1857 /* If the new declaration is a definition, update the file and
1858 line information on the declaration, and also make
1859 the old declaration the same definition. */
1860 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1862 DECL_SOURCE_LOCATION (olddecl
)
1863 = DECL_SOURCE_LOCATION (old_result
)
1864 = DECL_SOURCE_LOCATION (newdecl
);
1865 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1866 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1869 DECL_ARGUMENTS (old_result
)
1870 = DECL_ARGUMENTS (new_result
);
1871 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1872 parm
= DECL_CHAIN (parm
))
1873 DECL_CONTEXT (parm
) = old_result
;
1882 /* Automatically handles default parameters. */
1883 tree oldtype
= TREE_TYPE (olddecl
);
1886 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1887 maybe_instantiate_noexcept (olddecl
);
1889 /* Merge the data types specified in the two decls. */
1890 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1892 /* If merge_types produces a non-typedef type, just use the old type. */
1893 if (TREE_CODE (newdecl
) == TYPE_DECL
1894 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1897 if (VAR_P (newdecl
))
1899 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1900 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1901 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1902 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1903 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1904 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1906 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1907 if (DECL_LANG_SPECIFIC (olddecl
)
1908 && CP_DECL_THREADPRIVATE_P (olddecl
))
1910 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1911 if (!DECL_LANG_SPECIFIC (newdecl
))
1912 retrofit_lang_decl (newdecl
);
1914 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1915 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1919 /* Do this after calling `merge_types' so that default
1920 parameters don't confuse us. */
1921 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1922 check_redeclaration_exception_specification (newdecl
, olddecl
);
1923 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1925 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1926 check_default_args (newdecl
);
1928 /* Lay the type out, unless already done. */
1929 if (! same_type_p (newtype
, oldtype
)
1930 && TREE_TYPE (newdecl
) != error_mark_node
1931 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1932 layout_type (TREE_TYPE (newdecl
));
1934 if ((VAR_P (newdecl
)
1935 || TREE_CODE (newdecl
) == PARM_DECL
1936 || TREE_CODE (newdecl
) == RESULT_DECL
1937 || TREE_CODE (newdecl
) == FIELD_DECL
1938 || TREE_CODE (newdecl
) == TYPE_DECL
)
1939 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1940 layout_decl (newdecl
, 0);
1942 /* Merge the type qualifiers. */
1943 if (TREE_READONLY (newdecl
))
1944 TREE_READONLY (olddecl
) = 1;
1945 if (TREE_THIS_VOLATILE (newdecl
))
1946 TREE_THIS_VOLATILE (olddecl
) = 1;
1947 if (TREE_NOTHROW (newdecl
))
1948 TREE_NOTHROW (olddecl
) = 1;
1950 /* Merge deprecatedness. */
1951 if (TREE_DEPRECATED (newdecl
))
1952 TREE_DEPRECATED (olddecl
) = 1;
1954 /* Preserve function specific target and optimization options */
1955 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1957 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1958 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1959 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1960 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1962 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1963 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1964 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1965 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1968 /* Merge the initialization information. */
1969 if (DECL_INITIAL (newdecl
) == NULL_TREE
1970 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1972 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1973 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1974 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1976 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1977 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1981 /* Merge the section attribute.
1982 We want to issue an error if the sections conflict but that must be
1983 done later in decl_attributes since we are called before attributes
1985 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1986 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1988 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1990 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1991 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1992 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1993 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1994 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1995 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1996 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1997 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1998 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1999 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2000 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2001 /* Keep the old RTL. */
2002 COPY_DECL_RTL (olddecl
, newdecl
);
2004 else if (VAR_P (newdecl
)
2005 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2007 /* Keep the old RTL. We cannot keep the old RTL if the old
2008 declaration was for an incomplete object and the new
2009 declaration is not since many attributes of the RTL will
2011 COPY_DECL_RTL (olddecl
, newdecl
);
2014 /* If cannot merge, then use the new type and qualifiers,
2015 and don't preserve the old rtl. */
2018 /* Clean out any memory we had of the old declaration. */
2019 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2021 TREE_VALUE (oldstatic
) = error_mark_node
;
2023 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2024 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2025 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2026 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2029 /* Merge the storage class information. */
2030 merge_weak (newdecl
, olddecl
);
2032 if (DECL_ONE_ONLY (olddecl
))
2033 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2035 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2036 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2037 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2038 if (! DECL_EXTERNAL (olddecl
))
2039 DECL_EXTERNAL (newdecl
) = 0;
2041 new_template_info
= NULL_TREE
;
2042 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2044 bool new_redefines_gnu_inline
= false;
2046 if (new_defines_function
2047 && ((DECL_INTERFACE_KNOWN (olddecl
)
2048 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2049 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2050 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2051 == FUNCTION_DECL
))))
2055 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2056 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2058 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2061 if (!new_redefines_gnu_inline
)
2063 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2064 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2065 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2067 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2068 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2069 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2071 /* If the OLDDECL is an instantiation and/or specialization,
2072 then the NEWDECL must be too. But, it may not yet be marked
2073 as such if the caller has created NEWDECL, but has not yet
2074 figured out that it is a redeclaration. */
2075 if (!DECL_USE_TEMPLATE (newdecl
))
2076 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2078 /* Don't really know how much of the language-specific
2079 values we should copy from old to new. */
2080 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2081 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2082 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2083 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2085 if (LANG_DECL_HAS_MIN (newdecl
))
2087 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2088 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2089 if (DECL_TEMPLATE_INFO (newdecl
))
2090 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2091 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2093 /* Only functions have these fields. */
2094 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2096 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2097 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2098 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2099 && DECL_HIDDEN_FRIEND_P (olddecl
)
2100 && newdecl_is_friend
);
2101 DECL_BEFRIENDING_CLASSES (newdecl
)
2102 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2103 DECL_BEFRIENDING_CLASSES (olddecl
));
2104 /* DECL_THUNKS is only valid for virtual functions,
2105 otherwise it is a DECL_FRIEND_CONTEXT. */
2106 if (DECL_VIRTUAL_P (newdecl
))
2107 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2109 /* Only variables have this field. */
2110 else if (VAR_P (newdecl
)
2111 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2112 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2115 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2119 /* Merge parameter attributes. */
2120 tree oldarg
, newarg
;
2121 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2122 newarg
= DECL_ARGUMENTS(newdecl
);
2124 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2125 DECL_ATTRIBUTES (newarg
)
2126 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2127 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2130 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2131 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2133 /* If newdecl is not a specialization, then it is not a
2134 template-related function at all. And that means that we
2135 should have exited above, returning 0. */
2136 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2138 if (DECL_ODR_USED (olddecl
))
2139 /* From [temp.expl.spec]:
2141 If a template, a member template or the member of a class
2142 template is explicitly specialized then that
2143 specialization shall be declared before the first use of
2144 that specialization that would cause an implicit
2145 instantiation to take place, in every translation unit in
2146 which such a use occurs. */
2147 error ("explicit specialization of %qD after first use",
2150 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2152 /* Don't propagate visibility from the template to the
2153 specialization here. We'll do that in determine_visibility if
2155 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2157 /* [temp.expl.spec/14] We don't inline explicit specialization
2158 just because the primary template says so. */
2160 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2161 the always_inline attribute. */
2162 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2163 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2165 if (DECL_DECLARED_INLINE_P (newdecl
))
2166 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2168 DECL_ATTRIBUTES (newdecl
)
2169 = remove_attribute ("always_inline",
2170 DECL_ATTRIBUTES (newdecl
));
2173 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2175 /* Never inline re-defined extern inline functions.
2176 FIXME: this could be better handled by keeping both
2177 function as separate declarations. */
2178 DECL_UNINLINABLE (newdecl
) = 1;
2182 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2183 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2185 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2187 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2188 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2190 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2191 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2192 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2193 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2196 /* Preserve abstractness on cloned [cd]tors. */
2197 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2199 /* Update newdecl's parms to point at olddecl. */
2200 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2201 parm
= DECL_CHAIN (parm
))
2202 DECL_CONTEXT (parm
) = olddecl
;
2206 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2207 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2208 COPY_DECL_RTL (newdecl
, olddecl
);
2210 if (! types_match
|| new_defines_function
)
2212 /* These need to be copied so that the names are available.
2213 Note that if the types do match, we'll preserve inline
2214 info and other bits, but if not, we won't. */
2215 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2216 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2218 /* If redeclaring a builtin function, it stays built in
2219 if newdecl is a gnu_inline definition, or if newdecl is just
2221 if (DECL_BUILT_IN (olddecl
)
2222 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2224 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2225 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2226 /* If we're keeping the built-in definition, keep the rtl,
2227 regardless of declaration matches. */
2228 COPY_DECL_RTL (olddecl
, newdecl
);
2229 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2231 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2234 /* If a compatible prototype of these builtin functions
2235 is seen, assume the runtime implements it with the
2236 expected semantics. */
2237 case BUILT_IN_STPCPY
:
2238 if (builtin_decl_explicit_p (fncode
))
2239 set_builtin_decl_implicit_p (fncode
, true);
2246 if (new_defines_function
)
2247 /* If defining a function declared with other language
2248 linkage, use the previously declared language linkage. */
2249 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2250 else if (types_match
)
2252 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2253 /* Don't clear out the arguments if we're just redeclaring a
2255 if (DECL_ARGUMENTS (olddecl
))
2256 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2259 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2260 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2262 /* Now preserve various other info from the definition. */
2263 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2264 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2265 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2266 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2268 /* Warn about conflicting visibility specifications. */
2269 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2270 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2271 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2273 warning_at (input_location
, OPT_Wattributes
,
2274 "%q+D: visibility attribute ignored because it", newdecl
);
2275 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2276 "conflicts with previous declaration here");
2278 /* Choose the declaration which specified visibility. */
2279 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2281 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2282 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2284 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2285 so keep this behavior. */
2286 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2288 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2289 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2291 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2292 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2294 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2295 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2297 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2298 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2299 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2301 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2302 with that from NEWDECL below. */
2303 if (DECL_LANG_SPECIFIC (olddecl
))
2305 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2306 != DECL_LANG_SPECIFIC (newdecl
));
2307 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2310 /* Merge the USED information. */
2311 if (TREE_USED (olddecl
))
2312 TREE_USED (newdecl
) = 1;
2313 else if (TREE_USED (newdecl
))
2314 TREE_USED (olddecl
) = 1;
2315 if (VAR_P (newdecl
))
2317 if (DECL_READ_P (olddecl
))
2318 DECL_READ_P (newdecl
) = 1;
2319 else if (DECL_READ_P (newdecl
))
2320 DECL_READ_P (olddecl
) = 1;
2322 if (DECL_PRESERVE_P (olddecl
))
2323 DECL_PRESERVE_P (newdecl
) = 1;
2324 else if (DECL_PRESERVE_P (newdecl
))
2325 DECL_PRESERVE_P (olddecl
) = 1;
2327 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2328 to olddecl and deleted. */
2329 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2330 && DECL_FUNCTION_VERSIONED (olddecl
))
2332 /* Set the flag for newdecl so that it gets copied to olddecl. */
2333 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2334 /* newdecl will be purged after copying to olddecl and is no longer
2336 delete_function_version (newdecl
);
2339 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2343 function_size
= sizeof (struct tree_decl_common
);
2345 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2346 (char *) newdecl
+ sizeof (struct tree_common
),
2347 function_size
- sizeof (struct tree_common
));
2349 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2350 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2351 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2352 if (new_template_info
)
2353 /* If newdecl is a template instantiation, it is possible that
2354 the following sequence of events has occurred:
2356 o A friend function was declared in a class template. The
2357 class template was instantiated.
2359 o The instantiation of the friend declaration was
2360 recorded on the instantiation list, and is newdecl.
2362 o Later, however, instantiate_class_template called pushdecl
2363 on the newdecl to perform name injection. But, pushdecl in
2364 turn called duplicate_decls when it discovered that another
2365 declaration of a global function with the same name already
2368 o Here, in duplicate_decls, we decided to clobber newdecl.
2370 If we're going to do that, we'd better make sure that
2371 olddecl, and not newdecl, is on the list of
2372 instantiations so that if we try to do the instantiation
2373 again we won't get the clobbered declaration. */
2374 reregister_specialization (newdecl
,
2380 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2381 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2382 (char *) newdecl
+ sizeof (struct tree_common
),
2383 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2384 switch (TREE_CODE (olddecl
))
2394 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2395 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2396 size
- sizeof (struct tree_decl_common
)
2397 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2401 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2402 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2403 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2404 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2408 DECL_UID (olddecl
) = olddecl_uid
;
2410 DECL_FRIEND_P (olddecl
) = 1;
2413 DECL_ANTICIPATED (olddecl
) = 1;
2414 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2417 /* NEWDECL contains the merged attribute lists.
2418 Update OLDDECL to be the same. */
2419 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2421 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2422 so that encode_section_info has a chance to look at the new decl
2423 flags and attributes. */
2424 if (DECL_RTL_SET_P (olddecl
)
2425 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2427 && TREE_STATIC (olddecl
))))
2428 make_decl_rtl (olddecl
);
2430 /* The NEWDECL will no longer be needed. Because every out-of-class
2431 declaration of a member results in a call to duplicate_decls,
2432 freeing these nodes represents in a significant savings. */
2438 /* Return zero if the declaration NEWDECL is valid
2439 when the declaration OLDDECL (assumed to be for the same name)
2440 has already been seen.
2441 Otherwise return an error message format string with a %s
2442 where the identifier should go. */
2445 redeclaration_error_message (tree newdecl
, tree olddecl
)
2447 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2449 /* Because C++ can put things into name space for free,
2450 constructs like "typedef struct foo { ... } foo"
2451 would look like an erroneous redeclaration. */
2452 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2455 return G_("redefinition of %q#D");
2457 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2459 /* If this is a pure function, its olddecl will actually be
2460 the original initialization to `0' (which we force to call
2461 abort()). Don't complain about redefinition in this case. */
2462 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2463 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2466 /* If both functions come from different namespaces, this is not
2467 a redeclaration - this is a conflict with a used function. */
2468 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2469 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2470 && ! decls_match (olddecl
, newdecl
))
2471 return G_("%qD conflicts with used function");
2473 /* We'll complain about linkage mismatches in
2474 warn_extern_redeclared_static. */
2476 /* Defining the same name twice is no good. */
2477 if (DECL_INITIAL (olddecl
) != NULL_TREE
2478 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2480 if (DECL_NAME (olddecl
) == NULL_TREE
)
2481 return G_("%q#D not declared in class");
2482 else if (!GNU_INLINE_P (olddecl
)
2483 || GNU_INLINE_P (newdecl
))
2484 return G_("redefinition of %q#D");
2487 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2489 bool olda
= GNU_INLINE_P (olddecl
);
2490 bool newa
= GNU_INLINE_P (newdecl
);
2495 return G_("%q+D redeclared inline with "
2496 "%<gnu_inline%> attribute");
2498 return G_("%q+D redeclared inline without "
2499 "%<gnu_inline%> attribute");
2503 check_abi_tag_redeclaration
2504 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2505 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2509 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2513 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2515 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2516 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2517 return G_("redefinition of %q#D");
2521 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2522 || (DECL_TEMPLATE_RESULT (newdecl
)
2523 == DECL_TEMPLATE_RESULT (olddecl
)))
2526 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2527 if (DECL_TEMPLATE_INFO (nt
))
2528 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2529 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2530 if (DECL_TEMPLATE_INFO (ot
))
2531 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2532 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2533 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2534 return G_("redefinition of %q#D");
2536 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2538 bool olda
= GNU_INLINE_P (ot
);
2539 bool newa
= GNU_INLINE_P (nt
);
2544 return G_("%q+D redeclared inline with "
2545 "%<gnu_inline%> attribute");
2547 return G_("%q+D redeclared inline without "
2548 "%<gnu_inline%> attribute");
2552 /* Core issue #226 (C++0x):
2554 If a friend function template declaration specifies a
2555 default template-argument, that declaration shall be a
2556 definition and shall be the only declaration of the
2557 function template in the translation unit. */
2558 if ((cxx_dialect
!= cxx98
)
2559 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2560 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2561 /*is_primary=*/true,
2562 /*is_partial=*/false,
2563 /*is_friend_decl=*/2))
2564 return G_("redeclaration of friend %q#D "
2565 "may not have default template arguments");
2569 else if (VAR_P (newdecl
)
2570 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2571 && (! DECL_LANG_SPECIFIC (olddecl
)
2572 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2573 || DECL_THREAD_LOCAL_P (newdecl
)))
2575 /* Only variables can be thread-local, and all declarations must
2576 agree on this property. */
2577 if (DECL_THREAD_LOCAL_P (newdecl
))
2578 return G_("thread-local declaration of %q#D follows "
2579 "non-thread-local declaration");
2581 return G_("non-thread-local declaration of %q#D follows "
2582 "thread-local declaration");
2584 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2586 /* The objects have been declared at namespace scope. If either
2587 is a member of an anonymous union, then this is an invalid
2588 redeclaration. For example:
2594 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2595 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2596 return G_("redeclaration of %q#D");
2597 /* If at least one declaration is a reference, there is no
2598 conflict. For example:
2604 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2606 /* Reject two definitions. */
2607 return G_("redefinition of %q#D");
2611 /* Objects declared with block scope: */
2612 /* Reject two definitions, and reject a definition
2613 together with an external reference. */
2614 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2615 return G_("redeclaration of %q#D");
2620 /* Hash and equality functions for the named_label table. */
2623 named_label_entry_hash (const void *data
)
2625 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2626 return DECL_UID (ent
->label_decl
);
2630 named_label_entry_eq (const void *a
, const void *b
)
2632 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2633 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2634 return ent_a
->label_decl
== ent_b
->label_decl
;
2637 /* Create a new label, named ID. */
2640 make_label_decl (tree id
, int local_p
)
2642 struct named_label_entry
*ent
;
2646 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2648 DECL_CONTEXT (decl
) = current_function_decl
;
2649 DECL_MODE (decl
) = VOIDmode
;
2650 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2652 /* Say where one reference is to the label, for the sake of the
2653 error if it is not defined. */
2654 DECL_SOURCE_LOCATION (decl
) = input_location
;
2656 /* Record the fact that this identifier is bound to this label. */
2657 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2659 /* Create the label htab for the function on demand. */
2661 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2662 named_label_entry_eq
, NULL
);
2664 /* Record this label on the list of labels used in this function.
2665 We do this before calling make_label_decl so that we get the
2666 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2667 ent
= ggc_alloc_cleared_named_label_entry ();
2668 ent
->label_decl
= decl
;
2670 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2671 gcc_assert (*slot
== NULL
);
2677 /* Look for a label named ID in the current function. If one cannot
2678 be found, create one. (We keep track of used, but undefined,
2679 labels, and complain about them at the end of a function.) */
2682 lookup_label_1 (tree id
)
2686 /* You can't use labels at global scope. */
2687 if (current_function_decl
== NULL_TREE
)
2689 error ("label %qE referenced outside of any function", id
);
2693 /* See if we've already got this label. */
2694 decl
= IDENTIFIER_LABEL_VALUE (id
);
2695 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2698 decl
= make_label_decl (id
, /*local_p=*/0);
2702 /* Wrapper for lookup_label_1. */
2705 lookup_label (tree id
)
2708 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2709 ret
= lookup_label_1 (id
);
2710 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2714 /* Declare a local label named ID. */
2717 declare_local_label (tree id
)
2720 cp_label_binding bind
;
2722 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2723 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2724 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2726 decl
= make_label_decl (id
, /*local_p=*/1);
2728 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2733 /* Returns nonzero if it is ill-formed to jump past the declaration of
2734 DECL. Returns 2 if it's also a real problem. */
2737 decl_jump_unsafe (tree decl
)
2739 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2740 with automatic storage duration is not in scope to a point where it is
2741 in scope is ill-formed unless the variable has scalar type, class type
2742 with a trivial default constructor and a trivial destructor, a
2743 cv-qualified version of one of these types, or an array of one of the
2744 preceding types and is declared without an initializer (8.5). */
2745 tree type
= TREE_TYPE (decl
);
2747 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2748 || type
== error_mark_node
)
2751 type
= strip_array_types (type
);
2753 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2756 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2762 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2765 identify_goto (tree decl
, const location_t
*locus
)
2768 permerror (input_location
, "jump to label %qD", decl
);
2770 permerror (input_location
, "jump to case label");
2772 permerror (*locus
, " from here");
2775 /* Check that a single previously seen jump to a newly defined label
2776 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2777 the jump context; NAMES are the names in scope in LEVEL at the jump
2778 context; LOCUS is the source position of the jump or 0. Returns
2779 true if all is well. */
2782 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2783 bool exited_omp
, const location_t
*locus
)
2785 cp_binding_level
*b
;
2786 bool identified
= false, saw_eh
= false, saw_omp
= false;
2790 identify_goto (decl
, locus
);
2791 error (" exits OpenMP structured block");
2792 identified
= saw_omp
= true;
2795 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2797 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2799 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2800 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2801 : TREE_CHAIN (new_decls
)))
2803 int problem
= decl_jump_unsafe (new_decls
);
2809 identify_goto (decl
, locus
);
2813 error (" crosses initialization of %q+#D", new_decls
);
2815 permerror (input_location
, " enters scope of %q+#D which has "
2816 "non-trivial destructor", new_decls
);
2821 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2825 identify_goto (decl
, locus
);
2828 if (b
->kind
== sk_try
)
2829 error (" enters try block");
2831 error (" enters catch block");
2834 if (b
->kind
== sk_omp
&& !saw_omp
)
2838 identify_goto (decl
, locus
);
2841 error (" enters OpenMP structured block");
2850 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2852 check_previous_goto_1 (decl
, use
->binding_level
,
2853 use
->names_in_scope
, use
->in_omp_scope
,
2854 &use
->o_goto_locus
);
2858 check_switch_goto (cp_binding_level
* level
)
2860 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2863 /* Check that a new jump to a label DECL is OK. Called by
2864 finish_goto_stmt. */
2867 check_goto (tree decl
)
2869 struct named_label_entry
*ent
, dummy
;
2870 bool saw_catch
= false, identified
= false;
2874 /* We can't know where a computed goto is jumping.
2875 So we assume that it's OK. */
2876 if (TREE_CODE (decl
) != LABEL_DECL
)
2879 /* We didn't record any information about this label when we created it,
2880 and there's not much point since it's trivial to analyze as a return. */
2881 if (decl
== cdtor_label
)
2884 dummy
.label_decl
= decl
;
2885 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2886 gcc_assert (ent
!= NULL
);
2888 /* If the label hasn't been defined yet, defer checking. */
2889 if (! DECL_INITIAL (decl
))
2891 struct named_label_use_entry
*new_use
;
2893 /* Don't bother creating another use if the last goto had the
2894 same data, and will therefore create the same set of errors. */
2896 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2899 new_use
= ggc_alloc_named_label_use_entry ();
2900 new_use
->binding_level
= current_binding_level
;
2901 new_use
->names_in_scope
= current_binding_level
->names
;
2902 new_use
->o_goto_locus
= input_location
;
2903 new_use
->in_omp_scope
= false;
2905 new_use
->next
= ent
->uses
;
2906 ent
->uses
= new_use
;
2910 if (ent
->in_try_scope
|| ent
->in_catch_scope
2911 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2913 permerror (input_location
, "jump to label %q+D", decl
);
2914 permerror (input_location
, " from here");
2918 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2920 int u
= decl_jump_unsafe (bad
);
2922 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2924 /* Can't skip init of __exception_info. */
2925 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2929 error (" skips initialization of %q+#D", bad
);
2931 permerror (input_location
, " enters scope of %q+#D which has "
2932 "non-trivial destructor", bad
);
2935 if (ent
->in_try_scope
)
2936 error (" enters try block");
2937 else if (ent
->in_catch_scope
&& !saw_catch
)
2938 error (" enters catch block");
2940 if (ent
->in_omp_scope
)
2941 error (" enters OpenMP structured block");
2942 else if (flag_openmp
)
2944 cp_binding_level
*b
;
2945 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2947 if (b
== ent
->binding_level
)
2949 if (b
->kind
== sk_omp
)
2953 permerror (input_location
, "jump to label %q+D", decl
);
2954 permerror (input_location
, " from here");
2957 error (" exits OpenMP structured block");
2964 /* Check that a return is ok wrt OpenMP structured blocks.
2965 Called by finish_return_stmt. Returns true if all is well. */
2968 check_omp_return (void)
2970 cp_binding_level
*b
;
2971 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2972 if (b
->kind
== sk_omp
)
2974 error ("invalid exit from OpenMP structured block");
2977 else if (b
->kind
== sk_function_parms
)
2982 /* Define a label, specifying the location in the source file.
2983 Return the LABEL_DECL node for the label. */
2986 define_label_1 (location_t location
, tree name
)
2988 struct named_label_entry
*ent
, dummy
;
2989 cp_binding_level
*p
;
2992 decl
= lookup_label (name
);
2994 dummy
.label_decl
= decl
;
2995 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2996 gcc_assert (ent
!= NULL
);
2998 /* After labels, make any new cleanups in the function go into their
2999 own new (temporary) binding contour. */
3000 for (p
= current_binding_level
;
3001 p
->kind
!= sk_function_parms
;
3003 p
->more_cleanups_ok
= 0;
3005 if (name
== get_identifier ("wchar_t"))
3006 permerror (input_location
, "label named wchar_t");
3008 if (DECL_INITIAL (decl
) != NULL_TREE
)
3010 error ("duplicate label %qD", decl
);
3011 return error_mark_node
;
3015 struct named_label_use_entry
*use
;
3017 /* Mark label as having been defined. */
3018 DECL_INITIAL (decl
) = error_mark_node
;
3019 /* Say where in the source. */
3020 DECL_SOURCE_LOCATION (decl
) = location
;
3022 ent
->binding_level
= current_binding_level
;
3023 ent
->names_in_scope
= current_binding_level
->names
;
3025 for (use
= ent
->uses
; use
; use
= use
->next
)
3026 check_previous_goto (decl
, use
);
3033 /* Wrapper for define_label_1. */
3036 define_label (location_t location
, tree name
)
3039 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3040 ret
= define_label_1 (location
, name
);
3041 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3048 cp_binding_level
*level
;
3049 struct cp_switch
*next
;
3050 /* The SWITCH_STMT being built. */
3052 /* A splay-tree mapping the low element of a case range to the high
3053 element, or NULL_TREE if there is no high element. Used to
3054 determine whether or not a new case label duplicates an old case
3055 label. We need a tree, rather than simply a hash table, because
3056 of the GNU case range extension. */
3060 /* A stack of the currently active switch statements. The innermost
3061 switch statement is on the top of the stack. There is no need to
3062 mark the stack for garbage collection because it is only active
3063 during the processing of the body of a function, and we never
3064 collect at that point. */
3066 static struct cp_switch
*switch_stack
;
3068 /* Called right after a switch-statement condition is parsed.
3069 SWITCH_STMT is the switch statement being parsed. */
3072 push_switch (tree switch_stmt
)
3074 struct cp_switch
*p
= XNEW (struct cp_switch
);
3075 p
->level
= current_binding_level
;
3076 p
->next
= switch_stack
;
3077 p
->switch_stmt
= switch_stmt
;
3078 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3085 struct cp_switch
*cs
= switch_stack
;
3086 location_t switch_location
;
3088 /* Emit warnings as needed. */
3089 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3090 if (!processing_template_decl
)
3091 c_do_switch_warnings (cs
->cases
, switch_location
,
3092 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3093 SWITCH_STMT_COND (cs
->switch_stmt
));
3095 splay_tree_delete (cs
->cases
);
3096 switch_stack
= switch_stack
->next
;
3100 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3101 condition. Note that if TYPE and VALUE are already integral we don't
3102 really do the conversion because the language-independent
3103 warning/optimization code will work better that way. */
3106 case_conversion (tree type
, tree value
)
3108 if (value
== NULL_TREE
)
3111 if (cxx_dialect
>= cxx11
3112 && (SCOPED_ENUM_P (type
)
3113 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3115 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3116 type
= type_promotes_to (type
);
3117 value
= (perform_implicit_conversion_flags
3118 (type
, value
, tf_warning_or_error
,
3119 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3121 return cxx_constant_value (value
);
3124 /* Note that we've seen a definition of a case label, and complain if this
3125 is a bad place for one. */
3128 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3131 cp_binding_level
*p
;
3134 if (processing_template_decl
)
3138 /* For templates, just add the case label; we'll do semantic
3139 analysis at instantiation-time. */
3140 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3141 return add_stmt (build_case_label (low_value
, high_value
, label
));
3144 /* Find the condition on which this switch statement depends. */
3145 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3146 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3147 cond
= TREE_VALUE (cond
);
3149 if (!check_switch_goto (switch_stack
->level
))
3150 return error_mark_node
;
3152 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3154 low_value
= case_conversion (type
, low_value
);
3155 high_value
= case_conversion (type
, high_value
);
3157 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3158 low_value
, high_value
);
3160 /* After labels, make any new cleanups in the function go into their
3161 own new (temporary) binding contour. */
3162 for (p
= current_binding_level
;
3163 p
->kind
!= sk_function_parms
;
3165 p
->more_cleanups_ok
= 0;
3170 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3173 typename_hash (const void* k
)
3176 const_tree
const t
= (const_tree
) k
;
3178 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3179 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3184 typedef struct typename_info
{
3192 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3193 really of type `typename_info*' */
3196 typename_compare (const void * k1
, const void * k2
)
3198 const_tree
const t1
= (const_tree
) k1
;
3199 const typename_info
*const t2
= (const typename_info
*) k2
;
3201 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3202 && TYPE_CONTEXT (t1
) == t2
->scope
3203 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3204 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3205 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3208 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3209 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3211 Returns the new TYPENAME_TYPE. */
3213 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3216 build_typename_type (tree context
, tree name
, tree fullname
,
3217 enum tag_types tag_type
)
3225 if (typename_htab
== NULL
)
3226 typename_htab
= htab_create_ggc (61, &typename_hash
,
3227 &typename_compare
, NULL
);
3229 ti
.scope
= FROB_CONTEXT (context
);
3231 ti
.template_id
= fullname
;
3232 ti
.enum_p
= tag_type
== enum_type
;
3233 ti
.class_p
= (tag_type
== class_type
3234 || tag_type
== record_type
3235 || tag_type
== union_type
);
3236 hash
= (htab_hash_pointer (ti
.scope
)
3237 ^ htab_hash_pointer (ti
.name
));
3239 /* See if we already have this type. */
3240 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3245 /* Build the TYPENAME_TYPE. */
3246 t
= cxx_make_type (TYPENAME_TYPE
);
3247 TYPE_CONTEXT (t
) = ti
.scope
;
3248 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3249 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3250 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3252 /* Build the corresponding TYPE_DECL. */
3253 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3254 TYPE_NAME (TREE_TYPE (d
)) = d
;
3255 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3256 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3257 DECL_ARTIFICIAL (d
) = 1;
3259 /* Store it in the hash table. */
3262 /* TYPENAME_TYPEs must always be compared structurally, because
3263 they may or may not resolve down to another type depending on
3264 the currently open classes. */
3265 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3271 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3272 provided to name the type. Returns an appropriate type, unless an
3273 error occurs, in which case error_mark_node is returned. If we
3274 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3275 return that, rather than the _TYPE it corresponds to, in other
3276 cases we look through the type decl. If TF_ERROR is set, complain
3277 about errors, otherwise be quiet. */
3280 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3281 tsubst_flags_t complain
)
3287 if (name
== error_mark_node
3288 || context
== NULL_TREE
3289 || context
== error_mark_node
)
3290 return error_mark_node
;
3294 if (!(TYPE_LANG_SPECIFIC (name
)
3295 && (CLASSTYPE_IS_TEMPLATE (name
)
3296 || CLASSTYPE_USE_TEMPLATE (name
))))
3297 name
= TYPE_IDENTIFIER (name
);
3299 /* Create a TEMPLATE_ID_EXPR for the type. */
3300 name
= build_nt (TEMPLATE_ID_EXPR
,
3301 CLASSTYPE_TI_TEMPLATE (name
),
3302 CLASSTYPE_TI_ARGS (name
));
3304 else if (TREE_CODE (name
) == TYPE_DECL
)
3305 name
= DECL_NAME (name
);
3309 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3311 name
= TREE_OPERAND (name
, 0);
3312 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3313 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3314 else if (TREE_CODE (name
) == OVERLOAD
)
3316 if (complain
& tf_error
)
3317 error ("%qD is not a type", name
);
3318 return error_mark_node
;
3321 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3323 if (complain
& tf_error
)
3324 error ("%qD used without template parameters", name
);
3325 return error_mark_node
;
3327 gcc_assert (identifier_p (name
));
3328 gcc_assert (TYPE_P (context
));
3330 if (!MAYBE_CLASS_TYPE_P (context
))
3332 if (complain
& tf_error
)
3333 error ("%q#T is not a class", context
);
3334 return error_mark_node
;
3337 /* When the CONTEXT is a dependent type, NAME could refer to a
3338 dependent base class of CONTEXT. But look inside it anyway
3339 if CONTEXT is a currently open scope, in case it refers to a
3340 member of the current instantiation or a non-dependent base;
3341 lookup will stop when we hit a dependent base. */
3342 if (!dependent_scope_p (context
))
3343 /* We should only set WANT_TYPE when we're a nested typename type.
3344 Then we can give better diagnostics if we find a non-type. */
3345 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3349 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3350 return build_typename_type (context
, name
, fullname
, tag_type
);
3352 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3356 if (complain
& tf_error
)
3357 error (want_template
? G_("no class template named %q#T in %q#T")
3358 : G_("no type named %q#T in %q#T"), name
, context
);
3359 return error_mark_node
;
3362 /* Pull out the template from an injected-class-name (or multiple). */
3364 t
= maybe_get_template_decl_from_type_decl (t
);
3366 if (TREE_CODE (t
) == TREE_LIST
)
3368 if (complain
& tf_error
)
3370 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3371 print_candidates (t
);
3373 return error_mark_node
;
3376 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3378 if (complain
& tf_error
)
3379 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3381 return error_mark_node
;
3383 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3385 if (complain
& tf_error
)
3386 error ("%<typename %T::%D%> names %q#T, which is not a type",
3388 return error_mark_node
;
3391 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3392 return error_mark_node
;
3394 /* If we are currently parsing a template and if T is a typedef accessed
3395 through CONTEXT then we need to remember and check access of T at
3396 template instantiation time. */
3397 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3400 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3402 /*entering_scope=*/0,
3403 tf_warning_or_error
| tf_user
);
3405 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3408 maybe_record_typedef_use (t
);
3413 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3414 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3415 in which case error_mark_node is returned.
3417 If PARM_LIST is non-NULL, also make sure that the template parameter
3418 list of TEMPLATE_DECL matches.
3420 If COMPLAIN zero, don't complain about any errors that occur. */
3423 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3424 tsubst_flags_t complain
)
3430 name
= TYPE_IDENTIFIER (name
);
3431 else if (DECL_P (name
))
3432 name
= DECL_NAME (name
);
3433 gcc_assert (identifier_p (name
));
3435 if (!dependent_type_p (context
)
3436 || currently_open_class (context
))
3438 tree tmpl
= NULL_TREE
;
3440 if (MAYBE_CLASS_TYPE_P (context
))
3441 tmpl
= lookup_field (context
, name
, 0, false);
3443 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3444 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3446 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3448 if (complain
& tf_error
)
3449 error ("no class template named %q#T in %q#T", name
, context
);
3450 return error_mark_node
;
3454 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3456 if (complain
& tf_error
)
3458 error ("template parameters do not match template");
3459 error ("%q+D declared here", tmpl
);
3461 return error_mark_node
;
3464 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3466 return error_mark_node
;
3471 /* Build the UNBOUND_CLASS_TEMPLATE. */
3472 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3473 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3474 TREE_TYPE (t
) = NULL_TREE
;
3475 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3477 /* Build the corresponding TEMPLATE_DECL. */
3478 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3479 TYPE_NAME (TREE_TYPE (d
)) = d
;
3480 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3481 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3482 DECL_ARTIFICIAL (d
) = 1;
3483 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3490 /* Push the declarations of builtin types into the namespace.
3491 RID_INDEX is the index of the builtin type in the array
3492 RID_POINTERS. NAME is the name used when looking up the builtin
3493 type. TYPE is the _TYPE node for the builtin type. */
3496 record_builtin_type (enum rid rid_index
,
3500 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3501 tree tdecl
= NULL_TREE
;
3503 if ((int) rid_index
< (int) RID_MAX
)
3504 rname
= ridpointers
[(int) rid_index
];
3506 tname
= get_identifier (name
);
3508 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3509 eliminated. Built-in types should not be looked up name; their
3510 names are keywords that the parser can recognize. However, there
3511 is code in c-common.c that uses identifier_global_value to look
3512 up built-in types by name. */
3515 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3516 DECL_ARTIFICIAL (tdecl
) = 1;
3517 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3523 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3524 DECL_ARTIFICIAL (tdecl
) = 1;
3526 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3529 if (!TYPE_NAME (type
))
3530 TYPE_NAME (type
) = tdecl
;
3533 debug_hooks
->type_decl (tdecl
, 0);
3536 /* Record one of the standard Java types.
3537 * Declare it as having the given NAME.
3538 * If SIZE > 0, it is the size of one of the integral types;
3539 * otherwise it is the negative of the size of one of the other types. */
3542 record_builtin_java_type (const char* name
, int size
)
3547 type
= build_nonstandard_integer_type (size
, 0);
3548 type
= build_distinct_type_copy (type
);
3550 else if (size
> -32)
3553 /* "__java_char" or ""__java_boolean". */
3554 type
= build_nonstandard_integer_type (-size
, 1);
3555 type
= build_distinct_type_copy (type
);
3556 /* Get the signed type cached and attached to the unsigned type,
3557 so it doesn't get garbage-collected at "random" times,
3558 causing potential codegen differences out of different UIDs
3559 and different alias set numbers. */
3560 stype
= build_nonstandard_integer_type (-size
, 0);
3561 stype
= build_distinct_type_copy (stype
);
3562 TREE_CHAIN (type
) = stype
;
3563 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3566 { /* "__java_float" or ""__java_double". */
3567 type
= make_node (REAL_TYPE
);
3568 TYPE_PRECISION (type
) = - size
;
3571 record_builtin_type (RID_MAX
, name
, type
);
3572 decl
= TYPE_NAME (type
);
3574 /* Suppress generate debug symbol entries for these types,
3575 since for normal C++ they are just clutter.
3576 However, push_lang_context undoes this if extern "Java" is seen. */
3577 DECL_IGNORED_P (decl
) = 1;
3579 TYPE_FOR_JAVA (type
) = 1;
3583 /* Push a type into the namespace so that the back ends ignore it. */
3586 record_unknown_type (tree type
, const char* name
)
3588 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3589 TYPE_DECL
, get_identifier (name
), type
));
3590 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3591 DECL_IGNORED_P (decl
) = 1;
3592 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3593 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3594 TYPE_ALIGN (type
) = 1;
3595 TYPE_USER_ALIGN (type
) = 0;
3596 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3599 /* A string for which we should create an IDENTIFIER_NODE at
3602 typedef struct predefined_identifier
3604 /* The name of the identifier. */
3605 const char *const name
;
3606 /* The place where the IDENTIFIER_NODE should be stored. */
3608 /* Nonzero if this is the name of a constructor or destructor. */
3609 const int ctor_or_dtor_p
;
3610 } predefined_identifier
;
3612 /* Create all the predefined identifiers. */
3615 initialize_predefined_identifiers (void)
3617 const predefined_identifier
*pid
;
3619 /* A table of identifiers to create at startup. */
3620 static const predefined_identifier predefined_identifiers
[] = {
3621 { "C++", &lang_name_cplusplus
, 0 },
3622 { "C", &lang_name_c
, 0 },
3623 { "Java", &lang_name_java
, 0 },
3624 /* Some of these names have a trailing space so that it is
3625 impossible for them to conflict with names written by users. */
3626 { "__ct ", &ctor_identifier
, 1 },
3627 { "__base_ctor ", &base_ctor_identifier
, 1 },
3628 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3629 { "__dt ", &dtor_identifier
, 1 },
3630 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3631 { "__base_dtor ", &base_dtor_identifier
, 1 },
3632 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3633 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3634 { "nelts", &nelts_identifier
, 0 },
3635 { THIS_NAME
, &this_identifier
, 0 },
3636 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3637 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3638 { "_vptr", &vptr_identifier
, 0 },
3639 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3640 { "::", &global_scope_name
, 0 },
3641 { "std", &std_identifier
, 0 },
3645 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3647 *pid
->node
= get_identifier (pid
->name
);
3648 if (pid
->ctor_or_dtor_p
)
3649 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3653 /* Create the predefined scalar types of C,
3654 and some nodes representing standard constants (0, 1, (void *)0).
3655 Initialize the global binding level.
3656 Make definitions for built-in primitive functions. */
3659 cxx_init_decl_processing (void)
3662 tree void_ftype_ptr
;
3664 /* Create all the identifiers we need. */
3665 initialize_predefined_identifiers ();
3667 /* Create the global variables. */
3668 push_to_top_level ();
3670 current_function_decl
= NULL_TREE
;
3671 current_binding_level
= NULL
;
3672 /* Enter the global namespace. */
3673 gcc_assert (global_namespace
== NULL_TREE
);
3674 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3676 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3677 TREE_PUBLIC (global_namespace
) = 1;
3678 begin_scope (sk_namespace
, global_namespace
);
3680 if (flag_visibility_ms_compat
)
3681 default_visibility
= VISIBILITY_HIDDEN
;
3684 current_lang_name
= lang_name_c
;
3686 /* Create the `std' namespace. */
3687 push_namespace (std_identifier
);
3688 std_node
= current_namespace
;
3691 c_common_nodes_and_builtins ();
3693 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3694 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3695 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3696 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3697 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3698 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3699 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3700 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3702 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3704 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3705 truthvalue_type_node
= boolean_type_node
;
3706 truthvalue_false_node
= boolean_false_node
;
3707 truthvalue_true_node
= boolean_true_node
;
3709 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3710 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3711 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3714 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3717 delta_type_node
= ptrdiff_type_node
;
3718 vtable_index_type
= ptrdiff_type_node
;
3720 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3721 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3722 void_ftype_ptr
= build_function_type_list (void_type_node
,
3723 ptr_type_node
, NULL_TREE
);
3725 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3727 /* C++ extensions */
3729 unknown_type_node
= make_node (LANG_TYPE
);
3730 record_unknown_type (unknown_type_node
, "unknown type");
3732 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3733 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3735 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3737 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3738 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3740 init_list_type_node
= make_node (LANG_TYPE
);
3741 record_unknown_type (init_list_type_node
, "init list");
3744 /* Make sure we get a unique function type, so we can give
3745 its pointer type a name. (This wins for gdb.) */
3746 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3747 TREE_TYPE (vfunc_type
) = integer_type_node
;
3748 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3749 layout_type (vfunc_type
);
3751 vtable_entry_type
= build_pointer_type (vfunc_type
);
3753 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3756 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3757 layout_type (vtbl_type_node
);
3758 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3759 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3760 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3761 layout_type (vtbl_ptr_type_node
);
3762 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3764 push_namespace (get_identifier ("__cxxabiv1"));
3765 abi_node
= current_namespace
;
3768 global_type_node
= make_node (LANG_TYPE
);
3769 record_unknown_type (global_type_node
, "global type");
3772 current_lang_name
= lang_name_cplusplus
;
3775 tree newattrs
, extvisattr
;
3776 tree newtype
, deltype
;
3777 tree ptr_ftype_sizetype
;
3781 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3782 if (cxx_dialect
== cxx98
)
3785 tree bad_alloc_type_node
;
3786 tree bad_alloc_decl
;
3788 push_namespace (std_identifier
);
3789 bad_alloc_id
= get_identifier ("bad_alloc");
3790 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3791 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3793 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3794 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3798 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3801 new_eh_spec
= noexcept_false_spec
;
3803 /* Ensure attribs.c is initialized. */
3805 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3807 newattrs
= tree_cons (get_identifier ("alloc_size"),
3808 build_tree_list (NULL_TREE
, integer_one_node
),
3810 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3811 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3812 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3813 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3814 DECL_IS_OPERATOR_NEW (push_cp_library_fn (NEW_EXPR
, newtype
, 0)) = 1;
3815 DECL_IS_OPERATOR_NEW (push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0)) = 1;
3816 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3817 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3819 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3820 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3821 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3822 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3823 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3824 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3825 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3826 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3830 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3831 ECF_NORETURN
| ECF_NOTHROW
);
3833 /* Perform other language dependent initializations. */
3834 init_class_processing ();
3835 init_rtti_processing ();
3836 init_template_processing ();
3838 if (flag_exceptions
)
3839 init_exception_processing ();
3841 if (! supports_one_only ())
3844 make_fname_decl
= cp_make_fname_decl
;
3845 start_fname_decls ();
3847 /* Show we use EH for cleanups. */
3848 if (flag_exceptions
)
3849 using_eh_for_cleanups ();
3852 /* Generate an initializer for a function naming variable from
3853 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3854 filled in with the type of the init. */
3857 cp_fname_init (const char* name
, tree
*type_p
)
3859 tree domain
= NULL_TREE
;
3861 tree init
= NULL_TREE
;
3866 length
= strlen (name
);
3867 domain
= build_index_type (size_int (length
));
3868 init
= build_string (length
+ 1, name
);
3871 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3872 type
= build_cplus_array_type (type
, domain
);
3877 TREE_TYPE (init
) = type
;
3879 init
= error_mark_node
;
3884 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3885 the decl, LOC is the location to give the decl, NAME is the
3886 initialization string and TYPE_DEP indicates whether NAME depended
3887 on the type of the function. We make use of that to detect
3888 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3889 at the point of first use, so we mustn't push the decl now. */
3892 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3894 const char *const name
= (type_dep
&& processing_template_decl
3895 ? NULL
: fname_as_string (type_dep
));
3897 tree init
= cp_fname_init (name
, &type
);
3898 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3901 free (CONST_CAST (char *, name
));
3903 /* As we're using pushdecl_with_scope, we must set the context. */
3904 DECL_CONTEXT (decl
) = current_function_decl
;
3906 TREE_STATIC (decl
) = 1;
3907 TREE_READONLY (decl
) = 1;
3908 DECL_ARTIFICIAL (decl
) = 1;
3910 TREE_USED (decl
) = 1;
3912 if (current_function_decl
)
3914 cp_binding_level
*b
= current_binding_level
;
3915 if (b
->kind
== sk_function_parms
)
3916 return error_mark_node
;
3917 while (b
->level_chain
->kind
!= sk_function_parms
)
3919 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3920 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3921 LOOKUP_ONLYCONVERTING
);
3925 DECL_THIS_STATIC (decl
) = true;
3926 pushdecl_top_level_and_finish (decl
, init
);
3933 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3935 tree id
= DECL_NAME (decl
);
3936 const char *name
= IDENTIFIER_POINTER (id
);
3938 retrofit_lang_decl (decl
);
3940 DECL_ARTIFICIAL (decl
) = 1;
3941 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3942 SET_DECL_LANGUAGE (decl
, lang_c
);
3943 /* Runtime library routines are, by definition, available in an
3944 external shared object. */
3945 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3946 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3948 DECL_CONTEXT (decl
) = context
;
3951 pushdecl_top_level (decl
);
3955 /* A function in the user's namespace should have an explicit
3956 declaration before it is used. Mark the built-in function as
3957 anticipated but not actually declared. */
3958 if (name
[0] != '_' || name
[1] != '_')
3959 DECL_ANTICIPATED (decl
) = 1;
3960 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3962 size_t len
= strlen (name
);
3964 /* Treat __*_chk fortification functions as anticipated as well,
3965 unless they are __builtin_*. */
3966 if (len
> strlen ("___chk")
3967 && memcmp (name
+ len
- strlen ("_chk"),
3968 "_chk", strlen ("_chk") + 1) == 0)
3969 DECL_ANTICIPATED (decl
) = 1;
3976 cxx_builtin_function (tree decl
)
3978 tree id
= DECL_NAME (decl
);
3979 const char *name
= IDENTIFIER_POINTER (id
);
3980 /* All builtins that don't begin with an '_' should additionally
3981 go in the 'std' namespace. */
3984 tree decl2
= copy_node(decl
);
3985 push_namespace (std_identifier
);
3986 builtin_function_1 (decl2
, std_node
, false);
3990 return builtin_function_1 (decl
, NULL_TREE
, false);
3993 /* Like cxx_builtin_function, but guarantee the function is added to the global
3994 scope. This is to allow function specific options to add new machine
3995 dependent builtins when the target ISA changes via attribute((target(...)))
3996 which saves space on program startup if the program does not use non-generic
4000 cxx_builtin_function_ext_scope (tree decl
)
4003 tree id
= DECL_NAME (decl
);
4004 const char *name
= IDENTIFIER_POINTER (id
);
4005 /* All builtins that don't begin with an '_' should additionally
4006 go in the 'std' namespace. */
4009 tree decl2
= copy_node(decl
);
4010 push_namespace (std_identifier
);
4011 builtin_function_1 (decl2
, std_node
, true);
4015 return builtin_function_1 (decl
, NULL_TREE
, true);
4018 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4019 function. Not called directly. */
4022 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4025 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4026 DECL_EXTERNAL (fn
) = 1;
4027 TREE_PUBLIC (fn
) = 1;
4028 DECL_ARTIFICIAL (fn
) = 1;
4029 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4030 SET_DECL_LANGUAGE (fn
, lang_c
);
4031 /* Runtime library routines are, by definition, available in an
4032 external shared object. */
4033 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4034 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4035 set_call_expr_flags (fn
, ecf_flags
);
4039 /* Returns the _DECL for a library function with C++ linkage. */
4042 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4045 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4046 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4047 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4051 /* Like build_library_fn, but takes a C string instead of an
4055 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4057 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4060 /* Like build_cp_library_fn, but takes a C string instead of an
4064 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4066 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4070 /* Like build_library_fn, but also pushes the function so that we will
4071 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4072 may throw exceptions listed in RAISES. */
4075 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4080 type
= build_exception_variant (type
, raises
);
4082 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4083 pushdecl_top_level (fn
);
4087 /* Like build_cp_library_fn, but also pushes the function so that it
4088 will be found by normal lookup. */
4091 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4094 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4099 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4103 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4107 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4109 tree type
= build_function_type (void_type_node
, parmtypes
);
4110 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4113 /* Like push_library_fn, but also note that this function throws
4114 and does not return. Used for __throw_foo and the like. */
4117 push_throw_library_fn (tree name
, tree type
)
4119 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4123 /* When we call finish_struct for an anonymous union, we create
4124 default copy constructors and such. But, an anonymous union
4125 shouldn't have such things; this function undoes the damage to the
4126 anonymous union type T.
4128 (The reason that we create the synthesized methods is that we don't
4129 distinguish `union { int i; }' from `typedef union { int i; } U'.
4130 The first is an anonymous union; the second is just an ordinary
4134 fixup_anonymous_aggr (tree t
)
4138 /* Wipe out memory of synthesized methods. */
4139 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4140 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4141 TYPE_HAS_COPY_CTOR (t
) = 0;
4142 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4143 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4144 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4146 /* Splice the implicitly generated functions out of the TYPE_METHODS
4148 q
= &TYPE_METHODS (t
);
4151 if (DECL_ARTIFICIAL (*q
))
4152 *q
= TREE_CHAIN (*q
);
4154 q
= &DECL_CHAIN (*q
);
4157 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4158 if (TYPE_METHODS (t
))
4160 tree decl
= TYPE_MAIN_DECL (t
);
4162 if (TREE_CODE (t
) != UNION_TYPE
)
4163 error_at (DECL_SOURCE_LOCATION (decl
),
4164 "an anonymous struct cannot have function members");
4166 error_at (DECL_SOURCE_LOCATION (decl
),
4167 "an anonymous union cannot have function members");
4170 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4171 assignment operators (because they cannot have these methods themselves).
4172 For anonymous unions this is already checked because they are not allowed
4173 in any union, otherwise we have to check it. */
4174 if (TREE_CODE (t
) != UNION_TYPE
)
4178 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4179 if (TREE_CODE (field
) == FIELD_DECL
)
4181 type
= TREE_TYPE (field
);
4182 if (CLASS_TYPE_P (type
))
4184 if (TYPE_NEEDS_CONSTRUCTING (type
))
4185 error ("member %q+#D with constructor not allowed "
4186 "in anonymous aggregate", field
);
4187 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4188 error ("member %q+#D with destructor not allowed "
4189 "in anonymous aggregate", field
);
4190 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4191 error ("member %q+#D with copy assignment operator "
4192 "not allowed in anonymous aggregate", field
);
4198 /* Warn for an attribute located at LOCATION that appertains to the
4199 class type CLASS_TYPE that has not been properly placed after its
4200 class-key, in it class-specifier. */
4203 warn_misplaced_attr_for_class_type (source_location location
,
4206 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4208 warning_at (location
, OPT_Wattributes
,
4209 "attribute ignored in declaration "
4210 "of %q#T", class_type
);
4212 "attribute for %q#T must follow the %qs keyword",
4213 class_type
, class_key_or_enum_as_string (class_type
));
4216 /* Make sure that a declaration with no declarator is well-formed, i.e.
4217 just declares a tagged type or anonymous union.
4219 Returns the type declared; or NULL_TREE if none. */
4222 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4223 bool explicit_type_instantiation_p
)
4225 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4226 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4227 /* If a class, struct, or enum type is declared by the DECLSPECS
4228 (i.e, if a class-specifier, enum-specifier, or non-typename
4229 elaborated-type-specifier appears in the DECLSPECS),
4230 DECLARED_TYPE is set to the corresponding type. */
4231 tree declared_type
= NULL_TREE
;
4232 bool error_p
= false;
4234 if (declspecs
->multiple_types_p
)
4235 error ("multiple types in one declaration");
4236 else if (declspecs
->redefined_builtin_type
)
4238 if (!in_system_header
)
4239 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4240 "redeclaration of C++ built-in type %qT",
4241 declspecs
->redefined_builtin_type
);
4246 && TYPE_P (declspecs
->type
)
4247 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4248 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4249 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4250 declared_type
= declspecs
->type
;
4251 else if (declspecs
->type
== error_mark_node
)
4253 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4254 permerror (input_location
, "declaration does not declare anything");
4255 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4257 error ("%<auto%> can only be specified for variables "
4258 "or function declarations");
4259 return error_mark_node
;
4261 /* Check for an anonymous union. */
4262 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4263 && TYPE_ANONYMOUS_P (declared_type
))
4265 /* 7/3 In a simple-declaration, the optional init-declarator-list
4266 can be omitted only when declaring a class (clause 9) or
4267 enumeration (7.2), that is, when the decl-specifier-seq contains
4268 either a class-specifier, an elaborated-type-specifier with
4269 a class-key (9.1), or an enum-specifier. In these cases and
4270 whenever a class-specifier or enum-specifier is present in the
4271 decl-specifier-seq, the identifiers in these specifiers are among
4272 the names being declared by the declaration (as class-name,
4273 enum-names, or enumerators, depending on the syntax). In such
4274 cases, and except for the declaration of an unnamed bit-field (9.6),
4275 the decl-specifier-seq shall introduce one or more names into the
4276 program, or shall redeclare a name introduced by a previous
4277 declaration. [Example:
4278 enum { }; // ill-formed
4279 typedef class { }; // ill-formed
4283 error ("missing type-name in typedef-declaration");
4286 /* Anonymous unions are objects, so they can have specifiers. */;
4287 SET_ANON_AGGR_TYPE_P (declared_type
);
4289 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4290 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4295 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4296 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4297 error ("%qs can only be specified for functions",
4298 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4299 ? "inline" : "virtual");
4301 && (!current_class_type
4302 || current_scope () != current_class_type
))
4303 error ("%<friend%> can only be specified inside a class");
4304 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4305 error ("%<explicit%> can only be specified for constructors");
4306 else if (declspecs
->storage_class
)
4307 error ("a storage class can only be specified for objects "
4309 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4310 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4311 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4312 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4313 error ("qualifiers can only be specified for objects "
4315 else if (saw_typedef
)
4316 warning (0, "%<typedef%> was ignored in this declaration");
4317 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4318 error ("%<constexpr%> cannot be used for type declarations");
4321 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4324 if (!CLASS_TYPE_P (declared_type
)
4325 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4326 /* For a non-template class, use the name location. */
4327 loc
= location_of (declared_type
);
4329 /* For a template class (an explicit instantiation), use the
4330 current location. */
4331 loc
= input_location
;
4333 if (explicit_type_instantiation_p
)
4334 /* [dcl.attr.grammar]/4:
4336 No attribute-specifier-seq shall appertain to an explicit
4339 warning_at (loc
, OPT_Wattributes
,
4340 "attribute ignored in explicit instantiation %q#T",
4343 "no attribute can be applied to "
4344 "an explicit instantiation");
4347 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4350 return declared_type
;
4353 /* Called when a declaration is seen that contains no names to declare.
4354 If its type is a reference to a structure, union or enum inherited
4355 from a containing scope, shadow that tag name for the current scope
4356 with a forward reference.
4357 If its type defines a new named structure or union
4358 or defines an enum, it is valid but we need not do anything here.
4359 Otherwise, it is an error.
4361 C++: may have to grok the declspecs to learn about static,
4362 complain for anonymous unions.
4364 Returns the TYPE declared -- or NULL_TREE if none. */
4367 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4369 tree t
= check_tag_decl (declspecs
,
4370 /*explicit_type_instantiation_p=*/false);
4375 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4378 /* This is where the variables in an anonymous union are
4379 declared. An anonymous union declaration looks like:
4381 because there is no declarator after the union, the parser
4382 sends that declaration here. */
4383 if (ANON_AGGR_TYPE_P (t
))
4385 fixup_anonymous_aggr (t
);
4387 if (TYPE_FIELDS (t
))
4389 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4390 declspecs
, NORMAL
, 0, NULL
);
4391 finish_anon_union (decl
);
4398 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4401 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4402 const cp_declarator
*declarator
,
4403 bool is_template_arg
)
4407 enum decl_context context
4408 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4409 attrs
= type_specifiers
->attributes
;
4410 type_specifiers
->attributes
= NULL_TREE
;
4411 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4412 if (attrs
&& type
!= error_mark_node
)
4414 if (CLASS_TYPE_P (type
))
4415 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4416 "outside of definition", type
);
4417 else if (MAYBE_CLASS_TYPE_P (type
))
4418 /* A template type parameter or other dependent type. */
4419 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4420 "type %qT without an associated declaration", type
);
4422 cplus_decl_attributes (&type
, attrs
, 0);
4427 /* Process a DECLARATOR for a function-scope variable declaration,
4428 namespace-scope variable declaration, or function declaration.
4429 (Function definitions go through start_function; class member
4430 declarations appearing in the body of the class go through
4431 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4432 If an error occurs, the error_mark_node is returned instead.
4434 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4435 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4436 for an explicitly defaulted function, or SD_DELETED for an explicitly
4437 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4438 implicitly initialized via a default constructor. ATTRIBUTES and
4439 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4441 The scope represented by the context of the returned DECL is pushed
4442 (if it is not the global namespace) and is assigned to
4443 *PUSHED_SCOPE_P. The caller is then responsible for calling
4444 pop_scope on *PUSHED_SCOPE_P if it is set. */
4447 start_decl (const cp_declarator
*declarator
,
4448 cp_decl_specifier_seq
*declspecs
,
4451 tree prefix_attributes
,
4452 tree
*pushed_scope_p
)
4460 *pushed_scope_p
= NULL_TREE
;
4462 /* An object declared as __attribute__((deprecated)) suppresses
4463 warnings of uses of other deprecated items. */
4464 if (lookup_attribute ("deprecated", attributes
))
4465 deprecated_state
= DEPRECATED_SUPPRESS
;
4467 attributes
= chainon (attributes
, prefix_attributes
);
4469 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4472 deprecated_state
= DEPRECATED_NORMAL
;
4474 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4475 || decl
== error_mark_node
)
4476 return error_mark_node
;
4478 context
= CP_DECL_CONTEXT (decl
);
4479 if (context
!= global_namespace
)
4480 *pushed_scope_p
= push_scope (context
);
4483 /* Is it valid for this decl to have an initializer at all?
4484 If not, set INITIALIZED to zero, which will indirectly
4485 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4486 switch (TREE_CODE (decl
))
4489 error ("typedef %qD is initialized (use decltype instead)", decl
);
4490 return error_mark_node
;
4493 if (initialized
== SD_DELETED
)
4494 /* We'll handle the rest of the semantics later, but we need to
4495 set this now so it's visible to duplicate_decls. */
4496 DECL_DELETED_FN (decl
) = 1;
4505 if (! toplevel_bindings_p ()
4506 && DECL_EXTERNAL (decl
))
4507 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4509 DECL_EXTERNAL (decl
) = 0;
4510 if (toplevel_bindings_p ())
4511 TREE_STATIC (decl
) = 1;
4513 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4515 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4516 record_key_method_defined (decl
);
4518 /* If this is a typedef that names the class for linkage purposes
4519 (7.1.3p8), apply any attributes directly to the type. */
4520 if (TREE_CODE (decl
) == TYPE_DECL
4521 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4522 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4523 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4527 /* Set attributes here so if duplicate decl, will have proper attributes. */
4528 cplus_decl_attributes (&decl
, attributes
, flags
);
4530 /* Dllimported symbols cannot be defined. Static data members (which
4531 can be initialized in-class and dllimported) go through grokfield,
4532 not here, so we don't need to exclude those decls when checking for
4534 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4536 error ("definition of %q#D is marked %<dllimport%>", decl
);
4537 DECL_DLLIMPORT_P (decl
) = 0;
4540 /* If #pragma weak was used, mark the decl weak now. */
4541 if (!processing_template_decl
)
4542 maybe_apply_pragma_weak (decl
);
4544 if (TREE_CODE (decl
) == FUNCTION_DECL
4545 && DECL_DECLARED_INLINE_P (decl
)
4546 && DECL_UNINLINABLE (decl
)
4547 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4548 warning (0, "inline function %q+D given attribute noinline", decl
);
4550 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4554 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4555 if (field
== NULL_TREE
|| !VAR_P (field
))
4556 error ("%q#D is not a static member of %q#T", decl
, context
);
4559 if (DECL_CONTEXT (field
) != context
)
4561 if (!same_type_p (DECL_CONTEXT (field
), context
))
4562 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4563 "to be defined as %<%T::%D%>",
4564 DECL_CONTEXT (field
), DECL_NAME (decl
),
4565 context
, DECL_NAME (decl
));
4566 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4568 /* Static data member are tricky; an in-class initialization
4569 still doesn't provide a definition, so the in-class
4570 declaration will have DECL_EXTERNAL set, but will have an
4571 initialization. Thus, duplicate_decls won't warn
4572 about this situation, and so we check here. */
4573 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4574 error ("duplicate initialization of %qD", decl
);
4575 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4577 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4578 && !DECL_DECLARED_CONSTEXPR_P (field
))
4579 error ("%qD declared %<constexpr%> outside its class", field
);
4584 tree field
= check_classfn (context
, decl
,
4585 (processing_template_decl
4586 > template_class_depth (context
))
4587 ? current_template_parms
4589 if (field
&& field
!= error_mark_node
4590 && duplicate_decls (decl
, field
,
4591 /*newdecl_is_friend=*/false))
4595 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4596 DECL_IN_AGGR_P (decl
) = 0;
4597 /* Do not mark DECL as an explicit specialization if it was not
4598 already marked as an instantiation; a declaration should
4599 never be marked as a specialization unless we know what
4600 template is being specialized. */
4601 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4603 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4605 /* [temp.expl.spec] An explicit specialization of a static data
4606 member of a template is a definition if the declaration
4607 includes an initializer; otherwise, it is a declaration.
4609 We check for processing_specialization so this only applies
4610 to the new specialization syntax. */
4611 if (!initialized
&& processing_specialization
)
4612 DECL_EXTERNAL (decl
) = 1;
4615 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4616 /* Aliases are definitions. */
4618 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4622 was_public
= TREE_PUBLIC (decl
);
4624 /* Enter this declaration into the symbol table. */
4625 decl
= maybe_push_decl (decl
);
4627 if (processing_template_decl
)
4628 decl
= push_template_decl (decl
);
4629 if (decl
== error_mark_node
)
4630 return error_mark_node
;
4633 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4634 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4636 /* This is a const variable with implicit 'static'. Set
4637 DECL_THIS_STATIC so we can tell it from variables that are
4638 !TREE_PUBLIC because of the anonymous namespace. */
4639 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4640 DECL_THIS_STATIC (decl
) = 1;
4643 if (!processing_template_decl
&& VAR_P (decl
))
4644 start_decl_1 (decl
, initialized
);
4649 /* Process the declaration of a variable DECL. INITIALIZED is true
4650 iff DECL is explicitly initialized. (INITIALIZED is false if the
4651 variable is initialized via an implicitly-called constructor.)
4652 This function must be called for ordinary variables (including, for
4653 example, implicit instantiations of templates), but must not be
4654 called for template declarations. */
4657 start_decl_1 (tree decl
, bool initialized
)
4661 bool aggregate_definition_p
;
4663 gcc_assert (!processing_template_decl
);
4665 if (error_operand_p (decl
))
4668 gcc_assert (VAR_P (decl
));
4670 type
= TREE_TYPE (decl
);
4671 complete_p
= COMPLETE_TYPE_P (type
);
4672 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4674 /* If an explicit initializer is present, or if this is a definition
4675 of an aggregate, then we need a complete type at this point.
4676 (Scalars are always complete types, so there is nothing to
4677 check.) This code just sets COMPLETE_P; errors (if necessary)
4678 are issued below. */
4679 if ((initialized
|| aggregate_definition_p
)
4681 && COMPLETE_TYPE_P (complete_type (type
)))
4684 /* We will not yet have set TREE_READONLY on DECL if the type
4685 was "const", but incomplete, before this point. But, now, we
4686 have a complete type, so we can try again. */
4687 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4691 /* Is it valid for this decl to have an initializer at all? */
4693 /* Don't allow initializations for incomplete types except for
4694 arrays which might be completed by the initialization. */
4696 ; /* A complete type is ok. */
4697 else if (type_uses_auto (type
))
4698 ; /* An auto type is ok. */
4699 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4701 error ("variable %q#D has initializer but incomplete type", decl
);
4702 type
= TREE_TYPE (decl
) = error_mark_node
;
4704 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4706 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4707 error ("elements of array %q#D have incomplete type", decl
);
4708 /* else we already gave an error in start_decl. */
4711 else if (aggregate_definition_p
&& !complete_p
)
4713 if (type_uses_auto (type
))
4714 error ("declaration of %q#D has no initializer", decl
);
4716 error ("aggregate %q#D has incomplete type and cannot be defined",
4718 /* Change the type so that assemble_variable will give
4719 DECL an rtl we can live with: (mem (const_int 0)). */
4720 type
= TREE_TYPE (decl
) = error_mark_node
;
4723 /* Create a new scope to hold this declaration if necessary.
4724 Whether or not a new scope is necessary cannot be determined
4725 until after the type has been completed; if the type is a
4726 specialization of a class template it is not until after
4727 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4728 will be set correctly. */
4729 maybe_push_cleanup_level (type
);
4732 /* Handle initialization of references. DECL, TYPE, and INIT have the
4733 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4734 but will be set to a new CLEANUP_STMT if a temporary is created
4735 that must be destroyed subsequently.
4737 Returns an initializer expression to use to initialize DECL, or
4738 NULL if the initialization can be performed statically.
4740 Quotes on semantics can be found in ARM 8.4.3. */
4743 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4745 if (init
== NULL_TREE
)
4747 if ((DECL_LANG_SPECIFIC (decl
) == 0
4748 || DECL_IN_AGGR_P (decl
) == 0)
4749 && ! DECL_THIS_EXTERN (decl
))
4750 error ("%qD declared as reference but not initialized", decl
);
4754 if (TREE_CODE (init
) == TREE_LIST
)
4755 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4756 tf_warning_or_error
);
4758 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4759 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4760 /* Note: default conversion is only called in very special cases. */
4761 init
= decay_conversion (init
, tf_warning_or_error
);
4763 /* Convert INIT to the reference type TYPE. This may involve the
4764 creation of a temporary, whose lifetime must be the same as that
4765 of the reference. If so, a DECL_EXPR for the temporary will be
4766 added just after the DECL_EXPR for DECL. That's why we don't set
4767 DECL_INITIAL for local references (instead assigning to them
4768 explicitly); we need to allow the temporary to be initialized
4770 return initialize_reference (type
, init
, flags
,
4771 tf_warning_or_error
);
4774 /* Designated initializers in arrays are not supported in GNU C++.
4775 The parser cannot detect this error since it does not know whether
4776 a given brace-enclosed initializer is for a class type or for an
4777 array. This function checks that CE does not use a designated
4778 initializer. If it does, an error is issued. Returns true if CE
4779 is valid, i.e., does not have a designated initializer. */
4782 check_array_designated_initializer (constructor_elt
*ce
,
4783 unsigned HOST_WIDE_INT index
)
4785 /* Designated initializers for array elements are not supported. */
4788 /* The parser only allows identifiers as designated
4790 if (ce
->index
== error_mark_node
)
4792 error ("name used in a GNU-style designated "
4793 "initializer for an array");
4796 else if (identifier_p (ce
->index
))
4798 error ("name %qD used in a GNU-style designated "
4799 "initializer for an array", ce
->index
);
4803 ce
->index
= cxx_constant_value (ce
->index
);
4805 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4807 /* A C99 designator is OK if it matches the current index. */
4808 if (tree_fits_uhwi_p (ce
->index
)
4809 && tree_to_uhwi (ce
->index
) == index
)
4812 sorry ("non-trivial designated initializers not supported");
4823 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4824 array until we finish parsing the initializer. If that's the
4825 situation we're in, update DECL accordingly. */
4828 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4830 tree type
= TREE_TYPE (decl
);
4832 if (TREE_CODE (type
) == ARRAY_TYPE
4833 && TYPE_DOMAIN (type
) == NULL_TREE
4834 && TREE_CODE (decl
) != TYPE_DECL
)
4836 /* do_default is really a C-ism to deal with tentative definitions.
4837 But let's leave it here to ease the eventual merge. */
4838 int do_default
= !DECL_EXTERNAL (decl
);
4839 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4842 /* Check that there are no designated initializers in INIT, as
4843 those are not supported in GNU C++, and as the middle-end
4844 will crash if presented with a non-numeric designated
4846 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4848 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4849 constructor_elt
*ce
;
4851 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4852 if (!check_array_designated_initializer (ce
, i
))
4858 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4862 error ("initializer fails to determine size of %qD", decl
);
4864 else if (failure
== 2)
4868 error ("array size missing in %qD", decl
);
4870 /* If a `static' var's size isn't known, make it extern as
4871 well as static, so it does not get allocated. If it's not
4872 `static', then don't mark it extern; finish_incomplete_decl
4873 will give it a default size and it will get allocated. */
4874 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4875 DECL_EXTERNAL (decl
) = 1;
4877 else if (failure
== 3)
4879 error ("zero-size array %qD", decl
);
4883 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4885 relayout_decl (decl
);
4889 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4890 any appropriate error messages regarding the layout. */
4893 layout_var_decl (tree decl
)
4897 type
= TREE_TYPE (decl
);
4898 if (type
== error_mark_node
)
4901 /* If we haven't already laid out this declaration, do so now.
4902 Note that we must not call complete type for an external object
4903 because it's type might involve templates that we are not
4904 supposed to instantiate yet. (And it's perfectly valid to say
4905 `extern X x' for some incomplete type `X'.) */
4906 if (!DECL_EXTERNAL (decl
))
4907 complete_type (type
);
4908 if (!DECL_SIZE (decl
)
4909 && TREE_TYPE (decl
) != error_mark_node
4910 && (COMPLETE_TYPE_P (type
)
4911 || (TREE_CODE (type
) == ARRAY_TYPE
4912 && !TYPE_DOMAIN (type
)
4913 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4914 layout_decl (decl
, 0);
4916 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4918 /* An automatic variable with an incomplete type: that is an error.
4919 Don't talk about array types here, since we took care of that
4920 message in grokdeclarator. */
4921 error ("storage size of %qD isn%'t known", decl
);
4922 TREE_TYPE (decl
) = error_mark_node
;
4925 /* Keep this code around in case we later want to control debug info
4926 based on whether a type is "used". (jason 1999-11-11) */
4928 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4929 /* Let debugger know it should output info for this type. */
4930 note_debug_info_needed (ttype
);
4932 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4933 note_debug_info_needed (DECL_CONTEXT (decl
));
4936 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4937 && DECL_SIZE (decl
) != NULL_TREE
4938 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4940 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4941 constant_expression_warning (DECL_SIZE (decl
));
4944 error ("storage size of %qD isn%'t constant", decl
);
4945 TREE_TYPE (decl
) = error_mark_node
;
4950 /* If a local static variable is declared in an inline function, or if
4951 we have a weak definition, we must endeavor to create only one
4952 instance of the variable at link-time. */
4955 maybe_commonize_var (tree decl
)
4957 /* Static data in a function with comdat linkage also has comdat
4959 if (TREE_STATIC (decl
)
4960 /* Don't mess with __FUNCTION__. */
4961 && ! DECL_ARTIFICIAL (decl
)
4962 && DECL_FUNCTION_SCOPE_P (decl
)
4963 && vague_linkage_p (DECL_CONTEXT (decl
)))
4967 /* With weak symbols, we simply make the variable COMDAT;
4968 that will cause copies in multiple translations units to
4970 comdat_linkage (decl
);
4974 if (DECL_INITIAL (decl
) == NULL_TREE
4975 || DECL_INITIAL (decl
) == error_mark_node
)
4977 /* Without weak symbols, we can use COMMON to merge
4978 uninitialized variables. */
4979 TREE_PUBLIC (decl
) = 1;
4980 DECL_COMMON (decl
) = 1;
4984 /* While for initialized variables, we must use internal
4985 linkage -- which means that multiple copies will not
4987 TREE_PUBLIC (decl
) = 0;
4988 DECL_COMMON (decl
) = 0;
4989 warning_at (input_location
, 0,
4990 "sorry: semantics of inline function static "
4991 "data %q+#D are wrong (you%'ll wind up "
4992 "with multiple copies)", decl
);
4993 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4994 " you can work around this by removing "
4999 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
5000 /* Set it up again; we might have set DECL_INITIAL since the last
5002 comdat_linkage (decl
);
5005 /* Issue an error message if DECL is an uninitialized const variable. */
5008 check_for_uninitialized_const_var (tree decl
)
5010 tree type
= strip_array_types (TREE_TYPE (decl
));
5012 /* ``Unless explicitly declared extern, a const object does not have
5013 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5016 && TREE_CODE (type
) != REFERENCE_TYPE
5017 && CP_TYPE_CONST_P (type
)
5018 && !DECL_INITIAL (decl
))
5020 tree field
= default_init_uninitialized_part (type
);
5024 permerror (DECL_SOURCE_LOCATION (decl
),
5025 "uninitialized const %qD", decl
);
5027 if (CLASS_TYPE_P (type
))
5029 tree defaulted_ctor
;
5031 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5032 "%q#T has no user-provided default constructor", type
);
5033 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5035 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5036 "constructor is not user-provided because it is "
5037 "explicitly defaulted in the class body");
5038 inform (0, "and the implicitly-defined constructor does not "
5039 "initialize %q+#D", field
);
5044 /* Structure holding the current initializer being processed by reshape_init.
5045 CUR is a pointer to the current element being processed, END is a pointer
5046 after the last element present in the initializer. */
5047 typedef struct reshape_iterator_t
5049 constructor_elt
*cur
;
5050 constructor_elt
*end
;
5053 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5055 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5056 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5057 initialized. If there are no more such fields, the return value
5061 next_initializable_field (tree field
)
5064 && (TREE_CODE (field
) != FIELD_DECL
5065 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5066 || DECL_ARTIFICIAL (field
)))
5067 field
= DECL_CHAIN (field
);
5072 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5073 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5074 INTEGER_CST representing the size of the array minus one (the maximum index),
5075 or NULL_TREE if the array was declared without specifying the size. D is
5076 the iterator within the constructor. */
5079 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5080 tsubst_flags_t complain
)
5083 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5084 unsigned HOST_WIDE_INT max_index_cst
= 0;
5085 unsigned HOST_WIDE_INT index
;
5087 /* The initializer for an array is always a CONSTRUCTOR. */
5088 new_init
= build_constructor (init_list_type_node
, NULL
);
5092 /* Minus 1 is used for zero sized arrays. */
5093 if (integer_all_onesp (max_index
))
5096 if (tree_fits_uhwi_p (max_index
))
5097 max_index_cst
= tree_to_uhwi (max_index
);
5098 /* sizetype is sign extended, not zero extended. */
5100 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5103 /* Loop until there are no more initializers. */
5105 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5109 constructor_elt
*old_cur
= d
->cur
;
5111 check_array_designated_initializer (d
->cur
, index
);
5112 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5114 if (elt_init
== error_mark_node
)
5115 return error_mark_node
;
5116 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5117 size_int (index
), elt_init
);
5118 if (!TREE_CONSTANT (elt_init
))
5119 TREE_CONSTANT (new_init
) = false;
5121 /* This can happen with an invalid initializer (c++/54501). */
5122 if (d
->cur
== old_cur
&& !sized_array_p
)
5129 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5130 Parameters are the same of reshape_init_r. */
5133 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5135 tree max_index
= NULL_TREE
;
5137 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5139 if (TYPE_DOMAIN (type
))
5140 max_index
= array_type_nelts (type
);
5142 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5145 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5146 Parameters are the same of reshape_init_r. */
5149 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5151 tree max_index
= NULL_TREE
;
5153 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5155 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5157 tree value
= d
->cur
->value
;
5158 if (!same_type_p (TREE_TYPE (value
), type
))
5160 if (complain
& tf_error
)
5161 error ("invalid type %qT as initializer for a vector of type %qT",
5162 TREE_TYPE (d
->cur
->value
), type
);
5163 value
= error_mark_node
;
5169 /* For a vector, we initialize it as an array of the appropriate size. */
5170 if (TREE_CODE (type
) == VECTOR_TYPE
)
5171 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5173 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5176 /* Subroutine of reshape_init_r, processes the initializers for classes
5177 or union. Parameters are the same of reshape_init_r. */
5180 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5181 tsubst_flags_t complain
)
5186 gcc_assert (CLASS_TYPE_P (type
));
5188 /* The initializer for a class is always a CONSTRUCTOR. */
5189 new_init
= build_constructor (init_list_type_node
, NULL
);
5190 field
= next_initializable_field (TYPE_FIELDS (type
));
5196 An initializer for an aggregate member that is an
5197 empty class shall have the form of an empty
5198 initializer-list {}. */
5199 if (!first_initializer_p
)
5201 if (complain
& tf_error
)
5202 error ("initializer for %qT must be brace-enclosed", type
);
5203 return error_mark_node
;
5208 /* Loop through the initializable fields, gathering initializers. */
5209 while (d
->cur
!= d
->end
)
5212 constructor_elt
*old_cur
= d
->cur
;
5214 /* Handle designated initializers, as an extension. */
5217 if (d
->cur
->index
== error_mark_node
)
5218 return error_mark_node
;
5220 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5222 if (complain
& tf_error
)
5223 error ("%<[%E] =%> used in a GNU-style designated initializer"
5224 " for class %qT", d
->cur
->index
, type
);
5225 return error_mark_node
;
5228 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5229 /* We already reshaped this. */
5230 gcc_assert (d
->cur
->index
== field
);
5232 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5234 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5236 if (complain
& tf_error
)
5237 error ("%qT has no non-static data member named %qD", type
,
5239 return error_mark_node
;
5243 /* If we processed all the member of the class, we are done. */
5247 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5248 /*first_initializer_p=*/false, complain
);
5249 if (field_init
== error_mark_node
)
5250 return error_mark_node
;
5252 if (d
->cur
== old_cur
&& d
->cur
->index
)
5254 /* This can happen with an invalid initializer for a flexible
5255 array member (c++/54441). */
5256 if (complain
& tf_error
)
5257 error ("invalid initializer for %q#D", field
);
5258 return error_mark_node
;
5261 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5265 When a union is initialized with a brace-enclosed
5266 initializer, the braces shall only contain an
5267 initializer for the first member of the union. */
5268 if (TREE_CODE (type
) == UNION_TYPE
)
5271 field
= next_initializable_field (DECL_CHAIN (field
));
5277 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5278 designators are not valid; either complain or return true to indicate
5279 that reshape_init_r should return error_mark_node. */
5282 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5286 if (complain
& tf_error
)
5287 error ("C99 designator %qE outside aggregate initializer",
5295 /* Subroutine of reshape_init, which processes a single initializer (part of
5296 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5297 iterator within the CONSTRUCTOR which points to the initializer to process.
5298 FIRST_INITIALIZER_P is true if this is the first initializer of the
5299 outermost CONSTRUCTOR node. */
5302 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5303 tsubst_flags_t complain
)
5305 tree init
= d
->cur
->value
;
5307 if (error_operand_p (init
))
5308 return error_mark_node
;
5310 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5311 && has_designator_problem (d
, complain
))
5312 return error_mark_node
;
5314 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5316 /* A complex type can be initialized from one or two initializers,
5317 but braces are not elided. */
5319 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5321 if (CONSTRUCTOR_NELTS (init
) > 2)
5323 if (complain
& tf_error
)
5324 error ("too many initializers for %qT", type
);
5326 return error_mark_node
;
5329 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5331 vec
<constructor_elt
, va_gc
> *v
= 0;
5332 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5333 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5334 if (has_designator_problem (d
, complain
))
5335 return error_mark_node
;
5337 init
= build_constructor (init_list_type_node
, v
);
5342 /* A non-aggregate type is always initialized with a single
5344 if (!CP_AGGREGATE_TYPE_P (type
))
5346 /* It is invalid to initialize a non-aggregate type with a
5347 brace-enclosed initializer before C++0x.
5348 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5349 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5350 a CONSTRUCTOR (with a record type). */
5351 if (TREE_CODE (init
) == CONSTRUCTOR
5352 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5354 if (SCALAR_TYPE_P (type
))
5356 if (complain
& tf_error
)
5357 error ("braces around scalar initializer for type %qT", type
);
5358 init
= error_mark_node
;
5361 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5370 All implicit type conversions (clause _conv_) are considered when
5371 initializing the aggregate member with an initializer from an
5372 initializer-list. If the initializer can initialize a member,
5373 the member is initialized. Otherwise, if the member is itself a
5374 non-empty subaggregate, brace elision is assumed and the
5375 initializer is considered for the initialization of the first
5376 member of the subaggregate. */
5377 if (TREE_CODE (init
) != CONSTRUCTOR
5378 /* But don't try this for the first initializer, since that would be
5379 looking through the outermost braces; A a2 = { a1 }; is not a
5380 valid aggregate initialization. */
5381 && !first_initializer_p
5382 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5383 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5390 /* [dcl.init.string]
5392 A char array (whether plain char, signed char, or unsigned char)
5393 can be initialized by a string-literal (optionally enclosed in
5394 braces); a wchar_t array can be initialized by a wide
5395 string-literal (optionally enclosed in braces). */
5396 if (TREE_CODE (type
) == ARRAY_TYPE
5397 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5399 tree str_init
= init
;
5401 /* Strip one level of braces if and only if they enclose a single
5402 element (as allowed by [dcl.init.string]). */
5403 if (!first_initializer_p
5404 && TREE_CODE (str_init
) == CONSTRUCTOR
5405 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5407 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5410 /* If it's a string literal, then it's the initializer for the array
5411 as a whole. Otherwise, continue with normal initialization for
5412 array types (one value per array element). */
5413 if (TREE_CODE (str_init
) == STRING_CST
)
5415 if (has_designator_problem (d
, complain
))
5416 return error_mark_node
;
5422 /* The following cases are about aggregates. If we are not within a full
5423 initializer already, and there is not a CONSTRUCTOR, it means that there
5424 is a missing set of braces (that is, we are processing the case for
5425 which reshape_init exists). */
5426 if (!first_initializer_p
)
5428 if (TREE_CODE (init
) == CONSTRUCTOR
)
5430 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5431 /* There is no need to reshape pointer-to-member function
5432 initializers, as they are always constructed correctly
5433 by the front end. */
5435 else if (COMPOUND_LITERAL_P (init
))
5436 /* For a nested compound literal, there is no need to reshape since
5437 brace elision is not allowed. Even if we decided to allow it,
5438 we should add a call to reshape_init in finish_compound_literal,
5439 before calling digest_init, so changing this code would still
5440 not be necessary. */
5441 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5445 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5446 return reshape_init (type
, init
, complain
);
5450 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5454 /* Dispatch to specialized routines. */
5455 if (CLASS_TYPE_P (type
))
5456 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5457 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5458 return reshape_init_array (type
, d
, complain
);
5459 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5460 return reshape_init_vector (type
, d
, complain
);
5465 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5466 brace-enclosed aggregate initializer.
5468 INIT is the CONSTRUCTOR containing the list of initializers describing
5469 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5470 It may not presently match the shape of the TYPE; for example:
5472 struct S { int a; int b; };
5473 struct S a[] = { 1, 2, 3, 4 };
5475 Here INIT will hold a vector of four elements, rather than a
5476 vector of two elements, each itself a vector of two elements. This
5477 routine transforms INIT from the former form into the latter. The
5478 revised CONSTRUCTOR node is returned. */
5481 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5483 vec
<constructor_elt
, va_gc
> *v
;
5487 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5489 v
= CONSTRUCTOR_ELTS (init
);
5491 /* An empty constructor does not need reshaping, and it is always a valid
5493 if (vec_safe_is_empty (v
))
5496 /* Recurse on this CONSTRUCTOR. */
5498 d
.end
= d
.cur
+ v
->length ();
5500 new_init
= reshape_init_r (type
, &d
, true, complain
);
5501 if (new_init
== error_mark_node
)
5502 return error_mark_node
;
5504 /* Make sure all the element of the constructor were used. Otherwise,
5505 issue an error about exceeding initializers. */
5508 if (complain
& tf_error
)
5509 error ("too many initializers for %qT", type
);
5511 return error_mark_node
;
5517 /* Verify array initializer. Returns true if errors have been reported. */
5520 check_array_initializer (tree decl
, tree type
, tree init
)
5522 tree element_type
= TREE_TYPE (type
);
5524 /* The array type itself need not be complete, because the
5525 initializer may tell us how many elements are in the array.
5526 But, the elements of the array must be complete. */
5527 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5530 error ("elements of array %q#D have incomplete type", decl
);
5532 error ("elements of array %q#T have incomplete type", type
);
5535 /* A compound literal can't have variable size. */
5537 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5538 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5540 error ("variable-sized compound literal");
5546 /* Subroutine of check_initializer; args are passed down from that function.
5547 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5550 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5553 gcc_assert (stmts_are_full_exprs_p ());
5554 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5557 /* Verify INIT (the initializer for DECL), and record the
5558 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5559 grok_reference_init.
5561 If the return value is non-NULL, it is an expression that must be
5562 evaluated dynamically to initialize DECL. */
5565 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5567 tree type
= TREE_TYPE (decl
);
5568 tree init_code
= NULL
;
5569 tree extra_init
= NULL_TREE
;
5572 /* Things that are going to be initialized need to have complete
5574 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5576 if (DECL_HAS_VALUE_EXPR_P (decl
))
5578 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5579 it doesn't have storage to be initialized. */
5580 gcc_assert (init
== NULL_TREE
);
5584 if (type
== error_mark_node
)
5585 /* We will have already complained. */
5588 if (TREE_CODE (type
) == ARRAY_TYPE
)
5590 if (check_array_initializer (decl
, type
, init
))
5593 else if (!COMPLETE_TYPE_P (type
))
5595 error ("%q#D has incomplete type", decl
);
5596 TREE_TYPE (decl
) = error_mark_node
;
5600 /* There is no way to make a variable-sized class type in GNU C++. */
5601 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5603 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5605 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5606 if (SCALAR_TYPE_P (type
))
5610 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5611 init
= build_zero_init (type
, NULL_TREE
, false);
5613 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5615 error ("scalar object %qD requires one element in initializer",
5617 TREE_TYPE (decl
) = error_mark_node
;
5623 if (TREE_CODE (decl
) == CONST_DECL
)
5625 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5627 DECL_INITIAL (decl
) = init
;
5629 gcc_assert (init
!= NULL_TREE
);
5632 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5634 else if (init
|| type_build_ctor_call (type
)
5635 || TREE_CODE (type
) == REFERENCE_TYPE
)
5637 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5639 init
= grok_reference_init (decl
, type
, init
, flags
);
5640 flags
|= LOOKUP_ALREADY_DIGESTED
;
5643 check_for_uninitialized_const_var (decl
);
5644 /* Do not reshape constructors of vectors (they don't need to be
5646 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5648 if (is_std_init_list (type
))
5650 init
= perform_implicit_conversion (type
, init
,
5651 tf_warning_or_error
);
5652 flags
|= LOOKUP_ALREADY_DIGESTED
;
5654 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5656 /* Don't reshape if the class has constructors. */
5657 if (cxx_dialect
== cxx98
)
5658 error ("in C++98 %qD must be initialized by constructor, "
5662 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5664 error ("opaque vector types cannot be initialized");
5665 init
= error_mark_node
;
5669 init
= reshape_init (type
, init
, tf_warning_or_error
);
5670 if (SCALAR_TYPE_P (type
))
5671 check_narrowing (type
, init
);
5675 /* If DECL has an array type without a specific bound, deduce the
5676 array size from the initializer. */
5677 maybe_deduce_size_from_array_init (decl
, init
);
5678 type
= TREE_TYPE (decl
);
5679 if (type
== error_mark_node
)
5682 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5683 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5684 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5685 && CP_AGGREGATE_TYPE_P (type
)
5686 && (CLASS_TYPE_P (type
)
5687 || type_has_extended_temps (type
))))
5689 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5691 /* A constructor call is a non-trivial initializer even if
5692 it isn't explicitly written. */
5693 if (TREE_SIDE_EFFECTS (init_code
))
5694 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5696 /* If this is a constexpr initializer, expand_default_init will
5697 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5698 case, pull the initializer back out and pass it down into
5699 store_init_value. */
5700 while (TREE_CODE (init_code
) == EXPR_STMT
5701 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5702 init_code
= TREE_OPERAND (init_code
, 0);
5703 if (TREE_CODE (init_code
) == INIT_EXPR
)
5705 init
= TREE_OPERAND (init_code
, 1);
5706 init_code
= NULL_TREE
;
5707 /* Don't call digest_init; it's unnecessary and will complain
5708 about aggregate initialization of non-aggregate classes. */
5709 flags
|= LOOKUP_ALREADY_DIGESTED
;
5711 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5713 /* Declared constexpr, but no suitable initializer; massage
5714 init appropriately so we can pass it into store_init_value
5716 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5717 init
= finish_compound_literal (type
, init
,
5718 tf_warning_or_error
);
5719 else if (CLASS_TYPE_P (type
)
5720 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5722 init
= build_functional_cast (type
, init
, tf_none
);
5723 if (TREE_CODE (init
) == TARGET_EXPR
)
5724 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5726 init_code
= NULL_TREE
;
5732 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5734 /* In aggregate initialization of a variable, each element
5735 initialization is a full-expression because there is no
5736 enclosing expression. */
5737 gcc_assert (stmts_are_full_exprs_p ());
5739 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5741 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5742 && DECL_INITIAL (decl
)
5743 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5744 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5745 warning (0, "array %qD initialized by parenthesized string literal %qE",
5746 decl
, DECL_INITIAL (decl
));
5752 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5753 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5754 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5755 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5758 check_for_uninitialized_const_var (decl
);
5761 if (init
&& init
!= error_mark_node
)
5762 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5765 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5767 if (init_code
&& DECL_IN_AGGR_P (decl
))
5769 static int explained
= 0;
5771 if (cxx_dialect
< cxx11
)
5772 error ("initializer invalid for static member with constructor");
5774 error ("non-constant in-class initialization invalid for static "
5775 "member %qD", decl
);
5778 error ("(an out of class initialization is required)");
5786 /* If DECL is not a local variable, give it RTL. */
5789 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5791 int toplev
= toplevel_bindings_p ();
5793 const char *filename
;
5795 /* Set the DECL_ASSEMBLER_NAME for the object. */
5798 /* The `register' keyword, when used together with an
5799 asm-specification, indicates that the variable should be
5800 placed in a particular register. */
5801 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5803 set_user_assembler_name (decl
, asmspec
);
5804 DECL_HARD_REGISTER (decl
) = 1;
5808 if (TREE_CODE (decl
) == FUNCTION_DECL
5809 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5810 set_builtin_user_assembler_name (decl
, asmspec
);
5811 set_user_assembler_name (decl
, asmspec
);
5815 /* Handle non-variables up front. */
5818 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5822 /* If we see a class member here, it should be a static data
5824 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5826 gcc_assert (TREE_STATIC (decl
));
5827 /* An in-class declaration of a static data member should be
5828 external; it is only a declaration, and not a definition. */
5829 if (init
== NULL_TREE
)
5830 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5833 /* We don't create any RTL for local variables. */
5834 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5837 /* We defer emission of local statics until the corresponding
5838 DECL_EXPR is expanded. */
5839 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5841 /* We try to defer namespace-scope static constants so that they are
5842 not emitted into the object file unnecessarily. */
5843 filename
= input_filename
;
5844 if (!DECL_VIRTUAL_P (decl
)
5845 && TREE_READONLY (decl
)
5846 && DECL_INITIAL (decl
) != NULL_TREE
5847 && DECL_INITIAL (decl
) != error_mark_node
5849 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5851 && !TREE_PUBLIC (decl
))
5853 /* Fool with the linkage of static consts according to #pragma
5855 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5856 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5858 TREE_PUBLIC (decl
) = 1;
5859 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5864 /* Likewise for template instantiations. */
5865 else if (DECL_LANG_SPECIFIC (decl
)
5866 && DECL_IMPLICIT_INSTANTIATION (decl
))
5869 /* If we're not deferring, go ahead and assemble the variable. */
5871 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5874 /* walk_tree helper for wrap_temporary_cleanups, below. */
5877 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5879 /* Stop at types or full-expression boundaries. */
5880 if (TYPE_P (*stmt_p
)
5881 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5887 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5889 tree guard
= (tree
)data
;
5890 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5892 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5893 /* Tell honor_protect_cleanup_actions to handle this as a separate
5895 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5897 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5903 /* We're initializing a local variable which has a cleanup GUARD. If there
5904 are any temporaries used in the initializer INIT of this variable, we
5905 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5906 variable will be cleaned up properly if one of them throws.
5908 Unfortunately, there's no way to express this properly in terms of
5909 nesting, as the regions for the temporaries overlap the region for the
5910 variable itself; if there are two temporaries, the variable needs to be
5911 the first thing destroyed if either of them throws. However, we only
5912 want to run the variable's cleanup if it actually got constructed. So
5913 we need to guard the temporary cleanups with the variable's cleanup if
5914 they are run on the normal path, but not if they are run on the
5915 exceptional path. We implement this by telling
5916 honor_protect_cleanup_actions to strip the variable cleanup from the
5917 exceptional path. */
5920 wrap_temporary_cleanups (tree init
, tree guard
)
5922 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5925 /* Generate code to initialize DECL (a local variable). */
5928 initialize_local_var (tree decl
, tree init
)
5930 tree type
= TREE_TYPE (decl
);
5934 gcc_assert (VAR_P (decl
)
5935 || TREE_CODE (decl
) == RESULT_DECL
);
5936 gcc_assert (!TREE_STATIC (decl
));
5938 if (DECL_SIZE (decl
) == NULL_TREE
)
5940 /* If we used it already as memory, it must stay in memory. */
5941 DECL_INITIAL (decl
) = NULL_TREE
;
5942 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5946 if (type
== error_mark_node
)
5949 /* Compute and store the initial value. */
5950 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5951 if (TREE_USED (type
))
5952 DECL_READ_P (decl
) = 1;
5954 /* Generate a cleanup, if necessary. */
5955 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5957 /* Perform the initialization. */
5960 if (TREE_CODE (init
) == INIT_EXPR
5961 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5963 /* Stick simple initializers in DECL_INITIAL so that
5964 -Wno-init-self works (c++/34772). */
5965 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5966 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5970 int saved_stmts_are_full_exprs_p
;
5972 /* If we're only initializing a single object, guard the
5973 destructors of any temporaries used in its initializer with
5974 its destructor. This isn't right for arrays because each
5975 element initialization is a full-expression. */
5976 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5977 wrap_temporary_cleanups (init
, cleanup
);
5979 gcc_assert (building_stmt_list_p ());
5980 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5981 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5982 finish_expr_stmt (init
);
5983 current_stmt_tree ()->stmts_are_full_exprs_p
=
5984 saved_stmts_are_full_exprs_p
;
5988 /* Set this to 0 so we can tell whether an aggregate which was
5989 initialized was ever used. Don't do this if it has a
5990 destructor, so we don't complain about the 'resource
5991 allocation is initialization' idiom. Now set
5992 attribute((unused)) on types so decls of that type will be
5993 marked used. (see TREE_USED, above.) */
5994 if (TYPE_NEEDS_CONSTRUCTING (type
)
5996 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5997 && DECL_NAME (decl
))
5998 TREE_USED (decl
) = 0;
5999 else if (already_used
)
6000 TREE_USED (decl
) = 1;
6003 finish_decl_cleanup (decl
, cleanup
);
6006 /* DECL is a VAR_DECL for a compiler-generated variable with static
6007 storage duration (like a virtual table) whose initializer is a
6008 compile-time constant. Initialize the variable and provide it to the
6012 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6015 gcc_assert (DECL_ARTIFICIAL (decl
));
6016 init
= build_constructor (TREE_TYPE (decl
), v
);
6017 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6018 DECL_INITIAL (decl
) = init
;
6019 DECL_INITIALIZED_P (decl
) = 1;
6020 determine_visibility (decl
);
6021 layout_var_decl (decl
);
6022 maybe_commonize_var (decl
);
6023 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6026 /* INIT is the initializer for a variable, as represented by the
6027 parser. Returns true iff INIT is type-dependent. */
6030 type_dependent_init_p (tree init
)
6032 if (TREE_CODE (init
) == TREE_LIST
)
6033 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6034 return any_type_dependent_elements_p (init
);
6035 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6036 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6038 vec
<constructor_elt
, va_gc
> *elts
;
6042 elts
= CONSTRUCTOR_ELTS (init
);
6043 nelts
= vec_safe_length (elts
);
6044 for (i
= 0; i
< nelts
; ++i
)
6045 if (type_dependent_init_p ((*elts
)[i
].value
))
6049 /* It must be a simple expression, e.g., int i = 3; */
6050 return type_dependent_expression_p (init
);
6055 /* INIT is the initializer for a variable, as represented by the
6056 parser. Returns true iff INIT is value-dependent. */
6059 value_dependent_init_p (tree init
)
6061 if (TREE_CODE (init
) == TREE_LIST
)
6062 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6063 return any_value_dependent_elements_p (init
);
6064 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6065 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6067 vec
<constructor_elt
, va_gc
> *elts
;
6071 elts
= CONSTRUCTOR_ELTS (init
);
6072 nelts
= vec_safe_length (elts
);
6073 for (i
= 0; i
< nelts
; ++i
)
6074 if (value_dependent_init_p ((*elts
)[i
].value
))
6078 /* It must be a simple expression, e.g., int i = 3; */
6079 return value_dependent_expression_p (init
);
6084 /* Finish processing of a declaration;
6085 install its line number and initial value.
6086 If the length of an array type is not known before,
6087 it must be determined now, from the initial value, or it is an error.
6089 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6090 true, then INIT is an integral constant expression.
6092 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6093 if the (init) syntax was used. */
6096 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6097 tree asmspec_tree
, int flags
)
6100 vec
<tree
, va_gc
> *cleanups
= NULL
;
6101 const char *asmspec
= NULL
;
6102 int was_readonly
= 0;
6103 bool var_definition_p
= false;
6106 if (decl
== error_mark_node
)
6111 error ("assignment (not initialization) in declaration");
6115 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6116 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6117 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6119 type
= TREE_TYPE (decl
);
6120 if (type
== error_mark_node
)
6123 /* If a name was specified, get the string. */
6124 if (at_namespace_scope_p ())
6125 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6126 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6127 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6129 if (current_class_type
6130 && CP_DECL_CONTEXT (decl
) == current_class_type
6131 && TYPE_BEING_DEFINED (current_class_type
)
6132 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6133 && (DECL_INITIAL (decl
) || init
))
6134 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6136 if (TREE_CODE (decl
) != FUNCTION_DECL
6137 && (auto_node
= type_uses_auto (type
)))
6140 if (init
== NULL_TREE
)
6142 if (DECL_LANG_SPECIFIC (decl
)
6143 && DECL_TEMPLATE_INSTANTIATION (decl
)
6144 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6146 /* init is null because we're deferring instantiating the
6147 initializer until we need it. Well, we need it now. */
6148 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6152 error ("declaration of %q#D has no initializer", decl
);
6153 TREE_TYPE (decl
) = error_mark_node
;
6157 if (TREE_CODE (d_init
) == TREE_LIST
)
6158 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6159 tf_warning_or_error
);
6160 d_init
= resolve_nondeduced_context (d_init
);
6161 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6163 if (type
== error_mark_node
)
6165 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6168 if (!ensure_literal_type_for_constexpr_object (decl
))
6169 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6172 && DECL_CLASS_SCOPE_P (decl
)
6173 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6174 check_static_variable_definition (decl
, type
);
6176 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6179 if (init
== ridpointers
[(int)RID_DELETE
])
6181 /* FIXME check this is 1st decl. */
6182 DECL_DELETED_FN (decl
) = 1;
6183 DECL_DECLARED_INLINE_P (decl
) = 1;
6184 DECL_INITIAL (decl
) = error_mark_node
;
6185 FOR_EACH_CLONE (clone
, decl
)
6187 DECL_DELETED_FN (clone
) = 1;
6188 DECL_DECLARED_INLINE_P (clone
) = 1;
6189 DECL_INITIAL (clone
) = error_mark_node
;
6193 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6195 if (defaultable_fn_check (decl
))
6196 DECL_DEFAULTED_FN (decl
) = 1;
6198 DECL_INITIAL (decl
) = NULL_TREE
;
6202 if (init
&& VAR_P (decl
))
6204 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6205 /* If DECL is a reference, then we want to know whether init is a
6206 reference constant; init_const_expr_p as passed tells us whether
6207 it's an rvalue constant. */
6208 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6209 init_const_expr_p
= potential_constant_expression (init
);
6210 if (init_const_expr_p
)
6212 /* Set these flags now for templates. We'll update the flags in
6213 store_init_value for instantiations. */
6214 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6215 if (decl_maybe_constant_var_p (decl
))
6216 TREE_CONSTANT (decl
) = 1;
6220 if (processing_template_decl
)
6222 bool type_dependent_p
;
6224 /* Add this declaration to the statement-tree. */
6225 if (at_function_scope_p ())
6226 add_decl_expr (decl
);
6228 type_dependent_p
= dependent_type_p (type
);
6230 if (check_for_bare_parameter_packs (init
))
6233 DECL_INITIAL (decl
) = NULL_TREE
;
6236 /* Generally, initializers in templates are expanded when the
6237 template is instantiated. But, if DECL is a variable constant
6238 then it can be used in future constant expressions, so its value
6239 must be available. */
6241 if (!VAR_P (decl
) || dependent_type_p (type
))
6242 /* We can't do anything if the decl has dependent type. */;
6244 && init_const_expr_p
6245 && !type_dependent_p
6246 && decl_maybe_constant_var_p (decl
)
6247 && !type_dependent_init_p (init
)
6248 && !value_dependent_init_p (init
))
6250 /* This variable seems to be a non-dependent constant, so process
6251 its initializer. If check_initializer returns non-null the
6252 initialization wasn't constant after all. */
6254 cleanups
= make_tree_vector ();
6255 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6256 if (init_code
== NULL_TREE
)
6258 release_tree_vector (cleanups
);
6260 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6262 /* Deduce array size even if the initializer is dependent. */
6263 maybe_deduce_size_from_array_init (decl
, init
);
6264 /* And complain about multiple initializers. */
6265 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6266 && !MAYBE_CLASS_TYPE_P (type
))
6267 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6268 tf_warning_or_error
);
6272 DECL_INITIAL (decl
) = init
;
6276 /* Just store non-static data member initializers for later. */
6277 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6278 DECL_INITIAL (decl
) = init
;
6280 /* Take care of TYPE_DECLs up front. */
6281 if (TREE_CODE (decl
) == TYPE_DECL
)
6283 if (type
!= error_mark_node
6284 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6286 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6287 warning (0, "shadowing previous type declaration of %q#D", decl
);
6288 set_identifier_type_value (DECL_NAME (decl
), decl
);
6291 /* If we have installed this as the canonical typedef for this
6292 type, and that type has not been defined yet, delay emitting
6293 the debug information for it, as we will emit it later. */
6294 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6295 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6296 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6298 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6303 /* A reference will be modified here, as it is initialized. */
6304 if (! DECL_EXTERNAL (decl
)
6305 && TREE_READONLY (decl
)
6306 && TREE_CODE (type
) == REFERENCE_TYPE
)
6309 TREE_READONLY (decl
) = 0;
6314 /* If this is a local variable that will need a mangled name,
6315 register it now. We must do this before processing the
6316 initializer for the variable, since the initialization might
6317 require a guard variable, and since the mangled name of the
6318 guard variable will depend on the mangled name of this
6320 if (DECL_FUNCTION_SCOPE_P (decl
)
6321 && TREE_STATIC (decl
)
6322 && !DECL_ARTIFICIAL (decl
))
6324 push_local_name (decl
);
6325 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6326 || DECL_DESTRUCTOR_P (current_function_decl
))
6327 /* Normally local_decls is populated during GIMPLE lowering,
6328 but [cd]tors are never actually compiled directly. We need
6329 to put statics on the list so we can deal with the label
6330 address extension. FIXME. */
6331 add_local_decl (cfun
, decl
);
6334 /* Convert the initializer to the type of DECL, if we have not
6335 already initialized DECL. */
6336 if (!DECL_INITIALIZED_P (decl
)
6337 /* If !DECL_EXTERNAL then DECL is being defined. In the
6338 case of a static data member initialized inside the
6339 class-specifier, there can be an initializer even if DECL
6340 is *not* defined. */
6341 && (!DECL_EXTERNAL (decl
) || init
))
6343 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6346 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6347 /* Allow libjava/prims.cc define primitive classes. */
6348 if (init
!= NULL_TREE
6349 || jclass
== NULL_TREE
6350 || TREE_CODE (jclass
) != TYPE_DECL
6351 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6352 || !same_type_ignoring_top_level_qualifiers_p
6353 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6354 error ("Java object %qD not allocated with %<new%>", decl
);
6357 cleanups
= make_tree_vector ();
6358 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6364 The memory occupied by any object of static storage
6365 duration is zero-initialized at program startup before
6366 any other initialization takes place.
6368 We cannot create an appropriate initializer until after
6369 the type of DECL is finalized. If DECL_INITIAL is set,
6370 then the DECL is statically initialized, and any
6371 necessary zero-initialization has already been performed. */
6372 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6373 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6374 /*nelts=*/NULL_TREE
,
6375 /*static_storage_p=*/true);
6376 /* Remember that the initialization for this variable has
6378 DECL_INITIALIZED_P (decl
) = 1;
6379 /* This declaration is the definition of this variable,
6380 unless we are initializing a static data member within
6381 the class specifier. */
6382 if (!DECL_EXTERNAL (decl
))
6383 var_definition_p
= true;
6385 /* If the variable has an array type, lay out the type, even if
6386 there is no initializer. It is valid to index through the
6387 array, and we must get TYPE_ALIGN set correctly on the array
6389 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6392 if (TREE_STATIC (decl
)
6393 && !at_function_scope_p ()
6394 && current_function_decl
== NULL
)
6395 /* So decl is a global variable or a static member of a
6396 non local class. Record the types it uses
6397 so that we can decide later to emit debug info for them. */
6398 record_types_used_by_current_var_decl (decl
);
6400 else if (TREE_CODE (decl
) == FIELD_DECL
6401 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6402 error ("non-static data member %qD has Java class type", decl
);
6404 /* Add this declaration to the statement-tree. This needs to happen
6405 after the call to check_initializer so that the DECL_EXPR for a
6406 reference temp is added before the DECL_EXPR for the reference itself. */
6407 if (DECL_FUNCTION_SCOPE_P (decl
))
6408 add_decl_expr (decl
);
6410 /* Let the middle end know about variables and functions -- but not
6411 static data members in uninstantiated class templates. */
6412 if (VAR_OR_FUNCTION_DECL_P (decl
))
6416 layout_var_decl (decl
);
6417 maybe_commonize_var (decl
);
6420 /* This needs to happen after the linkage is set. */
6421 determine_visibility (decl
);
6423 if (var_definition_p
&& TREE_STATIC (decl
))
6425 /* If a TREE_READONLY variable needs initialization
6426 at runtime, it is no longer readonly and we need to
6427 avoid MEM_READONLY_P being set on RTL created for it. */
6430 if (TREE_READONLY (decl
))
6431 TREE_READONLY (decl
) = 0;
6434 else if (was_readonly
)
6435 TREE_READONLY (decl
) = 1;
6437 /* Likewise if it needs destruction. */
6438 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6439 TREE_READONLY (decl
) = 0;
6442 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6444 /* Check for abstractness of the type. Notice that there is no
6445 need to strip array types here since the check for those types
6446 is already done within create_array_type_for_decl. */
6447 abstract_virtuals_error (decl
, type
);
6449 if (TREE_TYPE (decl
) == error_mark_node
)
6450 /* No initialization required. */
6452 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6456 if (init
== ridpointers
[(int)RID_DEFAULT
])
6458 /* An out-of-class default definition is defined at
6459 the point where it is explicitly defaulted. */
6460 if (DECL_DELETED_FN (decl
))
6461 maybe_explain_implicit_delete (decl
);
6462 else if (DECL_INITIAL (decl
) == error_mark_node
)
6463 synthesize_method (decl
);
6466 error ("function %q#D is initialized like a variable", decl
);
6468 /* else no initialization required. */
6470 else if (DECL_EXTERNAL (decl
)
6471 && ! (DECL_LANG_SPECIFIC (decl
)
6472 && DECL_NOT_REALLY_EXTERN (decl
)))
6475 DECL_INITIAL (decl
) = init
;
6477 /* A variable definition. */
6478 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6479 /* Initialize the local variable. */
6480 initialize_local_var (decl
, init
);
6482 /* If a variable is defined, and then a subsequent
6483 definition with external linkage is encountered, we will
6484 get here twice for the same variable. We want to avoid
6485 calling expand_static_init more than once. For variables
6486 that are not static data members, we can call
6487 expand_static_init only when we actually process the
6488 initializer. It is not legal to redeclare a static data
6489 member, so this issue does not arise in that case. */
6490 else if (var_definition_p
&& TREE_STATIC (decl
))
6491 expand_static_init (decl
, init
);
6494 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6495 reference, insert it in the statement-tree now. */
6499 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6500 push_cleanup (decl
, t
, false);
6501 release_tree_vector (cleanups
);
6505 TREE_READONLY (decl
) = 1;
6507 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6510 /* Returns a declaration for a VAR_DECL as if:
6512 extern "C" TYPE NAME;
6514 had been seen. Used to create compiler-generated global
6518 declare_global_var (tree name
, tree type
)
6522 push_to_top_level ();
6523 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6524 TREE_PUBLIC (decl
) = 1;
6525 DECL_EXTERNAL (decl
) = 1;
6526 DECL_ARTIFICIAL (decl
) = 1;
6527 /* If the user has explicitly declared this variable (perhaps
6528 because the code we are compiling is part of a low-level runtime
6529 library), then it is possible that our declaration will be merged
6530 with theirs by pushdecl. */
6531 decl
= pushdecl (decl
);
6532 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6533 pop_from_top_level ();
6538 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6539 if "__cxa_atexit" is not being used) corresponding to the function
6540 to be called when the program exits. */
6543 get_atexit_fn_ptr_type (void)
6547 if (!atexit_fn_ptr_type_node
)
6550 if (flag_use_cxa_atexit
6551 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6552 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6553 arg_type
= ptr_type_node
;
6555 /* The parameter to "atexit" is "void (*)(void)". */
6556 arg_type
= NULL_TREE
;
6558 fn_type
= build_function_type_list (void_type_node
,
6559 arg_type
, NULL_TREE
);
6560 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6563 return atexit_fn_ptr_type_node
;
6566 /* Returns a pointer to the `atexit' function. Note that if
6567 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6568 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6571 get_atexit_node (void)
6577 bool use_aeabi_atexit
;
6582 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6584 /* The declaration for `__cxa_atexit' is:
6586 int __cxa_atexit (void (*)(void *), void *, void *)
6588 We build up the argument types and then the function type
6590 tree argtype0
, argtype1
, argtype2
;
6592 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6593 /* First, build the pointer-to-function type for the first
6595 fn_ptr_type
= get_atexit_fn_ptr_type ();
6596 /* Then, build the rest of the argument types. */
6597 argtype2
= ptr_type_node
;
6598 if (use_aeabi_atexit
)
6600 argtype1
= fn_ptr_type
;
6601 argtype0
= ptr_type_node
;
6605 argtype1
= ptr_type_node
;
6606 argtype0
= fn_ptr_type
;
6608 /* And the final __cxa_atexit type. */
6609 fn_type
= build_function_type_list (integer_type_node
,
6610 argtype0
, argtype1
, argtype2
,
6612 if (use_aeabi_atexit
)
6613 name
= "__aeabi_atexit";
6615 name
= "__cxa_atexit";
6619 /* The declaration for `atexit' is:
6621 int atexit (void (*)());
6623 We build up the argument types and then the function type
6625 fn_ptr_type
= get_atexit_fn_ptr_type ();
6626 /* Build the final atexit type. */
6627 fn_type
= build_function_type_list (integer_type_node
,
6628 fn_ptr_type
, NULL_TREE
);
6632 /* Now, build the function declaration. */
6633 push_lang_context (lang_name_c
);
6634 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6635 mark_used (atexit_fndecl
);
6636 pop_lang_context ();
6637 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6642 /* Like get_atexit_node, but for thread-local cleanups. */
6645 get_thread_atexit_node (void)
6647 /* The declaration for `__cxa_thread_atexit' is:
6649 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6650 tree fn_type
= build_function_type_list (integer_type_node
,
6651 get_atexit_fn_ptr_type (),
6652 ptr_type_node
, ptr_type_node
,
6655 /* Now, build the function declaration. */
6656 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6657 ECF_LEAF
| ECF_NOTHROW
);
6658 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6661 /* Returns the __dso_handle VAR_DECL. */
6664 get_dso_handle_node (void)
6666 if (dso_handle_node
)
6667 return dso_handle_node
;
6669 /* Declare the variable. */
6670 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6673 #ifdef HAVE_GAS_HIDDEN
6674 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6675 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6678 return dso_handle_node
;
6681 /* Begin a new function with internal linkage whose job will be simply
6682 to destroy some particular variable. */
6684 static GTY(()) int start_cleanup_cnt
;
6687 start_cleanup_fn (void)
6692 bool use_cxa_atexit
= flag_use_cxa_atexit
6693 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6695 push_to_top_level ();
6697 /* No need to mangle this. */
6698 push_lang_context (lang_name_c
);
6700 /* Build the name of the function. */
6701 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6702 /* Build the function declaration. */
6703 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6704 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6705 /* It's a function with internal linkage, generated by the
6707 TREE_PUBLIC (fndecl
) = 0;
6708 DECL_ARTIFICIAL (fndecl
) = 1;
6709 /* Make the function `inline' so that it is only emitted if it is
6710 actually needed. It is unlikely that it will be inlined, since
6711 it is only called via a function pointer, but we avoid unnecessary
6712 emissions this way. */
6713 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6714 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6715 /* Build the parameter. */
6720 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6721 DECL_CONTEXT (parmdecl
) = fndecl
;
6722 TREE_USED (parmdecl
) = 1;
6723 DECL_READ_P (parmdecl
) = 1;
6724 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6728 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6730 pop_lang_context ();
6732 return current_function_decl
;
6735 /* Finish the cleanup function begun by start_cleanup_fn. */
6738 end_cleanup_fn (void)
6740 expand_or_defer_fn (finish_function (0));
6742 pop_from_top_level ();
6745 /* Generate code to handle the destruction of DECL, an object with
6746 static storage duration. */
6749 register_dtor_fn (tree decl
)
6756 bool ob_parm
, dso_parm
, use_dtor
;
6757 tree arg0
, arg1
, arg2
;
6760 type
= TREE_TYPE (decl
);
6761 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6762 return void_zero_node
;
6764 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6765 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6766 destructor to "__cxa_atexit"; we don't have to build a temporary
6767 function to do the cleanup. */
6768 dso_parm
= (flag_use_cxa_atexit
6769 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6770 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6771 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6776 /* Find the destructor. */
6777 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6778 gcc_assert (idx
>= 0);
6779 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6780 /* Make sure it is accessible. */
6781 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6782 tf_warning_or_error
);
6786 /* Call build_cleanup before we enter the anonymous function so
6787 that any access checks will be done relative to the current
6788 scope, rather than the scope of the anonymous function. */
6789 build_cleanup (decl
);
6791 /* Now start the function. */
6792 cleanup
= start_cleanup_fn ();
6794 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6795 to the original function, rather than the anonymous one. That
6796 will make the back end think that nested functions are in use,
6797 which causes confusion. */
6798 push_deferring_access_checks (dk_no_check
);
6799 fcall
= build_cleanup (decl
);
6800 pop_deferring_access_checks ();
6802 /* Create the body of the anonymous function. */
6803 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6804 finish_expr_stmt (fcall
);
6805 finish_compound_stmt (compound_stmt
);
6809 /* Call atexit with the cleanup function. */
6810 mark_used (cleanup
);
6811 cleanup
= build_address (cleanup
);
6813 if (DECL_THREAD_LOCAL_P (decl
))
6814 atex_node
= get_thread_atexit_node ();
6816 atex_node
= get_atexit_node ();
6820 /* We must convert CLEANUP to the type that "__cxa_atexit"
6822 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6823 /* "__cxa_atexit" will pass the address of DECL to the
6824 cleanup function. */
6826 addr
= build_address (decl
);
6827 /* The declared type of the parameter to "__cxa_atexit" is
6828 "void *". For plain "T*", we could just let the
6829 machinery in cp_build_function_call convert it -- but if the
6830 type is "cv-qualified T *", then we need to convert it
6831 before passing it in, to avoid spurious errors. */
6832 addr
= build_nop (ptr_type_node
, addr
);
6835 /* Since the cleanup functions we build ignore the address
6836 they're given, there's no reason to pass the actual address
6837 in, and, in general, it's cheaper to pass NULL than any
6839 addr
= null_pointer_node
;
6842 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6843 tf_warning_or_error
);
6845 /* Just pass NULL to the dso handle parm if we don't actually
6846 have a DSO handle on this target. */
6847 arg2
= null_pointer_node
;
6853 if (!DECL_THREAD_LOCAL_P (decl
)
6854 && targetm
.cxx
.use_aeabi_atexit ())
6870 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6871 arg0
, arg1
, arg2
, NULL_TREE
);
6874 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6875 is its initializer. Generate code to handle the construction
6876 and destruction of DECL. */
6879 expand_static_init (tree decl
, tree init
)
6881 gcc_assert (VAR_P (decl
));
6882 gcc_assert (TREE_STATIC (decl
));
6884 /* Some variables require no dynamic initialization. */
6886 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6888 /* Make sure the destructor is callable. */
6889 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6893 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6894 && !DECL_FUNCTION_SCOPE_P (decl
))
6897 error ("non-local variable %qD declared %<__thread%> "
6898 "needs dynamic initialization", decl
);
6900 error ("non-local variable %qD declared %<__thread%> "
6901 "has a non-trivial destructor", decl
);
6902 static bool informed
;
6905 inform (DECL_SOURCE_LOCATION (decl
),
6906 "C++11 %<thread_local%> allows dynamic initialization "
6913 if (DECL_FUNCTION_SCOPE_P (decl
))
6915 /* Emit code to perform this initialization but once. */
6916 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6917 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6918 tree guard
, guard_addr
;
6920 /* We don't need thread-safety code for thread-local vars. */
6921 bool thread_guard
= (flag_threadsafe_statics
6922 && !DECL_THREAD_LOCAL_P (decl
));
6924 /* Emit code to perform this initialization but once. This code
6927 static <type> guard;
6928 if (!guard.first_byte) {
6929 if (__cxa_guard_acquire (&guard)) {
6932 // Do initialization.
6933 flag = true; __cxa_guard_release (&guard);
6934 // Register variable for destruction at end of program.
6936 if (!flag) __cxa_guard_abort (&guard);
6940 Note that the `flag' variable is only set to 1 *after* the
6941 initialization is complete. This ensures that an exception,
6942 thrown during the construction, will cause the variable to
6943 reinitialized when we pass through this code again, as per:
6947 If the initialization exits by throwing an exception, the
6948 initialization is not complete, so it will be tried again
6949 the next time control enters the declaration.
6951 This process should be thread-safe, too; multiple threads
6952 should not be able to initialize the variable more than
6955 /* Create the guard variable. */
6956 guard
= get_guard (decl
);
6958 /* This optimization isn't safe on targets with relaxed memory
6959 consistency. On such targets we force synchronization in
6960 __cxa_guard_acquire. */
6961 if (!targetm
.relaxed_ordering
|| !thread_guard
)
6963 /* Begin the conditional initialization. */
6964 if_stmt
= begin_if_stmt ();
6965 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6966 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6971 tree vfntype
= NULL_TREE
;
6972 tree acquire_name
, release_name
, abort_name
;
6973 tree acquire_fn
, release_fn
, abort_fn
;
6974 guard_addr
= build_address (guard
);
6976 acquire_name
= get_identifier ("__cxa_guard_acquire");
6977 release_name
= get_identifier ("__cxa_guard_release");
6978 abort_name
= get_identifier ("__cxa_guard_abort");
6979 acquire_fn
= identifier_global_value (acquire_name
);
6980 release_fn
= identifier_global_value (release_name
);
6981 abort_fn
= identifier_global_value (abort_name
);
6983 acquire_fn
= push_library_fn
6984 (acquire_name
, build_function_type_list (integer_type_node
,
6985 TREE_TYPE (guard_addr
),
6987 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
6988 if (!release_fn
|| !abort_fn
)
6989 vfntype
= build_function_type_list (void_type_node
,
6990 TREE_TYPE (guard_addr
),
6993 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
6994 ECF_NOTHROW
| ECF_LEAF
);
6996 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
6997 ECF_NOTHROW
| ECF_LEAF
);
6999 inner_if_stmt
= begin_if_stmt ();
7000 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7003 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7004 begin
= get_target_expr (boolean_false_node
);
7005 flag
= TARGET_EXPR_SLOT (begin
);
7007 TARGET_EXPR_CLEANUP (begin
)
7008 = build3 (COND_EXPR
, void_type_node
, flag
,
7010 build_call_n (abort_fn
, 1, guard_addr
));
7011 CLEANUP_EH_ONLY (begin
) = 1;
7013 /* Do the initialization itself. */
7014 init
= add_stmt_to_compound (begin
, init
);
7015 init
= add_stmt_to_compound
7016 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7017 init
= add_stmt_to_compound
7018 (init
, build_call_n (release_fn
, 1, guard_addr
));
7021 init
= add_stmt_to_compound (init
, set_guard (guard
));
7023 /* Use atexit to register a function for destroying this static
7025 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7027 finish_expr_stmt (init
);
7031 finish_compound_stmt (inner_then_clause
);
7032 finish_then_clause (inner_if_stmt
);
7033 finish_if_stmt (inner_if_stmt
);
7036 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7038 finish_compound_stmt (then_clause
);
7039 finish_then_clause (if_stmt
);
7040 finish_if_stmt (if_stmt
);
7043 else if (DECL_THREAD_LOCAL_P (decl
))
7044 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7046 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7050 /* Make TYPE a complete type based on INITIAL_VALUE.
7051 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7052 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7053 3 if the initializer list is empty (in pedantic mode). */
7056 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7059 tree type
, elt_type
;
7063 unsigned HOST_WIDE_INT i
;
7066 /* An array of character type can be initialized from a
7067 brace-enclosed string constant.
7069 FIXME: this code is duplicated from reshape_init. Probably
7070 we should just call reshape_init here? */
7071 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7072 && TREE_CODE (initial_value
) == CONSTRUCTOR
7073 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7075 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7076 tree value
= (*v
)[0].value
;
7078 if (TREE_CODE (value
) == STRING_CST
7079 && v
->length () == 1)
7080 initial_value
= value
;
7083 /* If any of the elements are parameter packs, we can't actually
7084 complete this type now because the array size is dependent. */
7085 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7087 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7090 if (PACK_EXPANSION_P (value
))
7096 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7098 /* We can create the array before the element type is complete, which
7099 means that we didn't have these two bits set in the original type
7100 either. In completing the type, we are expected to propagate these
7101 bits. See also complete_type which does the same thing for arrays
7104 if (TYPE_DOMAIN (type
))
7106 elt_type
= TREE_TYPE (type
);
7107 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7108 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7109 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7115 /* As above, but either give an error or reject zero-size arrays, depending
7119 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7120 bool do_default
, tsubst_flags_t complain
)
7123 bool sfinae
= !(complain
& tf_error
);
7124 /* In SFINAE context we can't be lenient about zero-size arrays. */
7127 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7133 /* Not an error. */;
7134 else if (failure
== 1)
7135 error ("initializer fails to determine size of %qT", *ptype
);
7136 else if (failure
== 2)
7139 error ("array size missing in %qT", *ptype
);
7141 else if (failure
== 3)
7142 error ("zero-size array %qT", *ptype
);
7143 *ptype
= error_mark_node
;
7148 /* Return zero if something is declared to be a member of type
7149 CTYPE when in the context of CUR_TYPE. STRING is the error
7150 message to print in that case. Otherwise, quietly return 1. */
7153 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7155 if (ctype
&& ctype
!= cur_type
)
7157 if (flags
== DTOR_FLAG
)
7158 error ("destructor for alien class %qT cannot be a member", ctype
);
7160 error ("constructor for alien class %qT cannot be a member", ctype
);
7166 /* Subroutine of `grokdeclarator'. */
7168 /* Generate errors possibly applicable for a given set of specifiers.
7169 This is for ARM $7.1.2. */
7172 bad_specifiers (tree object
,
7173 enum bad_spec_place type
,
7184 error ("%qD declared as a %<virtual%> variable", object
);
7186 error ("%qD declared as an %<inline%> variable", object
);
7188 error ("%<const%> and %<volatile%> function specifiers on "
7189 "%qD invalid in variable declaration", object
);
7193 error ("%qD declared as a %<virtual%> parameter", object
);
7195 error ("%qD declared as an %<inline%> parameter", object
);
7197 error ("%<const%> and %<volatile%> function specifiers on "
7198 "%qD invalid in parameter declaration", object
);
7202 error ("%qD declared as a %<virtual%> type", object
);
7204 error ("%qD declared as an %<inline%> type", object
);
7206 error ("%<const%> and %<volatile%> function specifiers on "
7207 "%qD invalid in type declaration", object
);
7211 error ("%qD declared as a %<virtual%> field", object
);
7213 error ("%qD declared as an %<inline%> field", object
);
7215 error ("%<const%> and %<volatile%> function specifiers on "
7216 "%qD invalid in field declaration", object
);
7222 error ("%q+D declared as a friend", object
);
7224 && (TREE_CODE (object
) == TYPE_DECL
7225 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7226 && !TYPE_REFFN_P (TREE_TYPE (object
))
7227 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7228 error ("%q+D declared with an exception specification", object
);
7231 /* DECL is a member function or static data member and is presently
7232 being defined. Check that the definition is taking place in a
7236 check_class_member_definition_namespace (tree decl
)
7238 /* These checks only apply to member functions and static data
7240 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7241 /* We check for problems with specializations in pt.c in
7242 check_specialization_namespace, where we can issue better
7244 if (processing_specialization
)
7246 /* There are no restrictions on the placement of
7247 explicit instantiations. */
7248 if (processing_explicit_instantiation
)
7252 A member function definition that appears outside of the
7253 class definition shall appear in a namespace scope enclosing
7254 the class definition.
7258 The definition for a static data member shall appear in a
7259 namespace scope enclosing the member's class definition. */
7260 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7261 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7262 decl
, DECL_CONTEXT (decl
));
7265 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7266 METHOD_TYPE for a non-static member function; QUALS are the
7267 cv-qualifiers that apply to the function. */
7270 build_this_parm (tree type
, cp_cv_quals quals
)
7275 cp_cv_quals this_quals
;
7277 if (CLASS_TYPE_P (type
))
7280 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7281 this_type
= build_pointer_type (this_type
);
7284 this_type
= type_of_this_parm (type
);
7285 /* The `this' parameter is implicitly `const'; it cannot be
7287 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7288 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7289 parm
= build_artificial_parm (this_identifier
, qual_type
);
7290 cp_apply_type_quals_to_decl (this_quals
, parm
);
7294 /* DECL is a static member function. Complain if it was declared
7295 with function-cv-quals. */
7298 check_static_quals (tree decl
, cp_cv_quals quals
)
7300 if (quals
!= TYPE_UNQUALIFIED
)
7301 error ("static member function %q#D declared with type qualifiers",
7305 /* Helper function. Replace the temporary this parameter injected
7306 during cp_finish_omp_declare_simd with the real this parameter. */
7309 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7311 tree this_parm
= (tree
) data
;
7312 if (TREE_CODE (*tp
) == PARM_DECL
7313 && DECL_NAME (*tp
) == this_identifier
7314 && *tp
!= this_parm
)
7316 else if (TYPE_P (*tp
))
7321 /* CTYPE is class type, or null if non-class.
7322 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7324 DECLARATOR is the function's name.
7325 PARMS is a chain of PARM_DECLs for the function.
7326 VIRTUALP is truthvalue of whether the function is virtual or not.
7327 FLAGS are to be passed through to `grokclassfn'.
7328 QUALS are qualifiers indicating whether the function is `const'
7330 RAISES is a list of exceptions that this function can raise.
7331 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7332 not look, and -1 if we should not call `grokclassfn' at all.
7334 SFK is the kind of special function (if any) for the new function.
7336 Returns `NULL_TREE' if something goes wrong, after issuing
7337 applicable error messages. */
7340 grokfndecl (tree ctype
,
7344 tree orig_declarator
,
7346 enum overload_flags flags
,
7348 cp_ref_qualifier rqual
,
7354 special_function_kind sfk
,
7359 location_t location
)
7362 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7366 type
= build_ref_qualified_type (type
, rqual
);
7368 type
= build_exception_variant (type
, raises
);
7370 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7372 /* If we have an explicit location, use it, otherwise use whatever
7373 build_lang_decl used (probably input_location). */
7374 if (location
!= UNKNOWN_LOCATION
)
7375 DECL_SOURCE_LOCATION (decl
) = location
;
7377 if (TREE_CODE (type
) == METHOD_TYPE
)
7380 parm
= build_this_parm (type
, quals
);
7381 DECL_CHAIN (parm
) = parms
;
7384 DECL_ARGUMENTS (decl
) = parms
;
7385 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7386 DECL_CONTEXT (t
) = decl
;
7387 /* Propagate volatile out from type to decl. */
7388 if (TYPE_VOLATILE (type
))
7389 TREE_THIS_VOLATILE (decl
) = 1;
7391 /* Setup decl according to sfk. */
7394 case sfk_constructor
:
7395 case sfk_copy_constructor
:
7396 case sfk_move_constructor
:
7397 DECL_CONSTRUCTOR_P (decl
) = 1;
7399 case sfk_destructor
:
7400 DECL_DESTRUCTOR_P (decl
) = 1;
7406 /* If pointers to member functions use the least significant bit to
7407 indicate whether a function is virtual, ensure a pointer
7408 to this function will have that bit clear. */
7409 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7410 && TREE_CODE (type
) == METHOD_TYPE
7411 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7412 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7415 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7419 ("defining explicit specialization %qD in friend declaration",
7423 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7424 tree args
= TREE_OPERAND (orig_declarator
, 1);
7426 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7428 /* Something like `template <class T> friend void f<T>()'. */
7429 error ("invalid use of template-id %qD in declaration "
7430 "of primary template",
7436 /* A friend declaration of the form friend void f<>(). Record
7437 the information in the TEMPLATE_ID_EXPR. */
7438 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7440 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7441 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7443 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7444 if (TREE_PURPOSE (t
)
7445 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7447 error ("default arguments are not allowed in declaration "
7448 "of friend template specialization %qD",
7454 error ("%<inline%> is not allowed in declaration of friend "
7455 "template specialization %qD",
7458 error ("%<constexpr%> is not allowed in declaration of friend "
7459 "template specialization %qD",
7466 /* If this decl has namespace scope, set that up. */
7468 set_decl_namespace (decl
, in_namespace
, friendp
);
7470 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7472 /* `main' and builtins have implicit 'C' linkage. */
7473 if ((MAIN_NAME_P (declarator
)
7474 || (IDENTIFIER_LENGTH (declarator
) > 10
7475 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7476 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7477 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7478 || (targetcm
.cxx_implicit_extern_c
7479 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7480 && current_lang_name
== lang_name_cplusplus
7481 && ctype
== NULL_TREE
7482 && DECL_FILE_SCOPE_P (decl
))
7483 SET_DECL_LANGUAGE (decl
, lang_c
);
7485 /* Should probably propagate const out from type to decl I bet (mrs). */
7488 DECL_STATIC_FUNCTION_P (decl
) = 1;
7489 DECL_CONTEXT (decl
) = ctype
;
7494 DECL_CONTEXT (decl
) = ctype
;
7496 check_class_member_definition_namespace (decl
);
7499 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7501 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7502 error ("cannot declare %<::main%> to be a template");
7504 error ("cannot declare %<::main%> to be inline");
7506 error ("cannot declare %<::main%> to be constexpr");
7508 error ("cannot declare %<::main%> to be static");
7513 /* Members of anonymous types and local classes have no linkage; make
7514 them internal. If a typedef is made later, this will be changed. */
7515 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7516 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7519 if (publicp
&& cxx_dialect
== cxx98
)
7521 /* [basic.link]: A name with no linkage (notably, the name of a class
7522 or enumeration declared in a local scope) shall not be used to
7523 declare an entity with linkage.
7525 DR 757 relaxes this restriction for C++0x. */
7526 t
= no_linkage_check (TREE_TYPE (decl
),
7527 /*relaxed_p=*/false);
7530 if (TYPE_ANONYMOUS_P (t
))
7532 if (DECL_EXTERN_C_P (decl
))
7533 /* Allow this; it's pretty common in C. */;
7536 permerror (input_location
, "anonymous type with no linkage "
7537 "used to declare function %q#D with linkage",
7539 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7540 permerror (input_location
, "%q+#D does not refer to the unqualified "
7541 "type, so it is not used for linkage",
7546 permerror (input_location
, "type %qT with no linkage used to "
7547 "declare function %q#D with linkage", t
, decl
);
7551 TREE_PUBLIC (decl
) = publicp
;
7554 DECL_INTERFACE_KNOWN (decl
) = 1;
7555 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7558 /* If the declaration was declared inline, mark it as such. */
7560 DECL_DECLARED_INLINE_P (decl
) = 1;
7562 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7564 DECL_EXTERNAL (decl
) = 1;
7565 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7570 ? G_("static member function %qD cannot have cv-qualifier")
7571 : G_("non-member function %qD cannot have cv-qualifier"),
7573 quals
= TYPE_UNQUALIFIED
;
7579 ? G_("static member function %qD cannot have ref-qualifier")
7580 : G_("non-member function %qD cannot have ref-qualifier"),
7582 rqual
= REF_QUAL_NONE
;
7586 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7587 && !grok_op_properties (decl
, /*complain=*/true))
7589 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7591 bool long_long_unsigned_p
;
7593 const char *suffix
= NULL
;
7594 /* [over.literal]/6: Literal operators shall not have C linkage. */
7595 if (DECL_LANGUAGE (decl
) == lang_c
)
7597 error ("literal operator with C linkage");
7601 if (DECL_NAMESPACE_SCOPE_P (decl
))
7603 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7606 error ("%qD has invalid argument list", decl
);
7610 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7611 if (long_long_unsigned_p
)
7613 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7614 warning (0, "integer suffix %<%s%>"
7615 " shadowed by implementation", suffix
);
7617 else if (long_double_p
)
7619 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7620 warning (0, "floating point suffix %<%s%>"
7621 " shadowed by implementation", suffix
);
7626 error ("%qD must be a non-member function", decl
);
7632 /* Make the init_value nonzero so pushdecl knows this is not
7633 tentative. error_mark_node is replaced later with the BLOCK. */
7634 DECL_INITIAL (decl
) = error_mark_node
;
7636 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7637 TREE_NOTHROW (decl
) = 1;
7641 /* Adjust "omp declare simd" attributes. */
7642 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7646 for (attr
= ods
; attr
;
7647 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7649 if (TREE_CODE (type
) == METHOD_TYPE
)
7650 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7651 DECL_ARGUMENTS (decl
), NULL
);
7652 if (TREE_VALUE (attr
) != NULL_TREE
)
7654 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7655 cl
= c_omp_declare_simd_clauses_to_numbers
7656 (DECL_ARGUMENTS (decl
), cl
);
7658 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7660 TREE_VALUE (attr
) = NULL_TREE
;
7666 /* Caller will do the rest of this. */
7670 if (ctype
!= NULL_TREE
)
7671 grokclassfn (ctype
, decl
, flags
);
7674 if (cxx_dialect
>= cxx11
7675 && DECL_DESTRUCTOR_P (decl
)
7676 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7677 && !processing_template_decl
)
7678 deduce_noexcept_on_destructor (decl
);
7680 decl
= check_explicit_specialization (orig_declarator
, decl
,
7683 4 * (friendp
!= 0));
7684 if (decl
== error_mark_node
)
7687 if (DECL_STATIC_FUNCTION_P (decl
))
7688 check_static_quals (decl
, quals
);
7692 cplus_decl_attributes (&decl
, *attrlist
, 0);
7693 *attrlist
= NULL_TREE
;
7696 /* Check main's type after attributes have been applied. */
7697 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7699 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7702 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7704 error ("%<::main%> must return %<int%>");
7705 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7706 TREE_TYPE (decl
) = newtype
;
7709 check_main_parameter_types (decl
);
7712 if (ctype
!= NULL_TREE
7713 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7716 tree old_decl
= check_classfn (ctype
, decl
,
7717 (processing_template_decl
7718 > template_class_depth (ctype
))
7719 ? current_template_parms
7722 if (old_decl
== error_mark_node
)
7730 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7731 /* Because grokfndecl is always supposed to return a
7732 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7733 here. We depend on our callers to figure out that its
7734 really a template that's being returned. */
7735 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7737 if (DECL_STATIC_FUNCTION_P (old_decl
)
7738 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7740 /* Remove the `this' parm added by grokclassfn. */
7741 revert_static_member_fn (decl
);
7742 check_static_quals (decl
, quals
);
7744 if (DECL_ARTIFICIAL (old_decl
))
7746 error ("definition of implicitly-declared %qD", old_decl
);
7749 else if (DECL_DEFAULTED_FN (old_decl
))
7751 error ("definition of explicitly-defaulted %q+D", decl
);
7752 error ("%q+#D explicitly defaulted here", old_decl
);
7756 /* Since we've smashed OLD_DECL to its
7757 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7758 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7759 decl
= DECL_TEMPLATE_RESULT (decl
);
7761 /* Attempt to merge the declarations. This can fail, in
7762 the case of some invalid specialization declarations. */
7763 pushed_scope
= push_scope (ctype
);
7764 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7766 pop_scope (pushed_scope
);
7769 error ("no %q#D member function declared in class %qT",
7777 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7780 if (ctype
== NULL_TREE
|| check
)
7784 DECL_VIRTUAL_P (decl
) = 1;
7789 /* decl is a FUNCTION_DECL.
7790 specifiers are the parsed virt-specifiers.
7792 Set flags to reflect the virt-specifiers.
7797 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7799 if (decl
== NULL_TREE
)
7801 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7802 DECL_OVERRIDE_P (decl
) = 1;
7803 if (specifiers
& VIRT_SPEC_FINAL
)
7804 DECL_FINAL_P (decl
) = 1;
7808 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7809 the linkage that DECL will receive in the object file. */
7812 set_linkage_for_static_data_member (tree decl
)
7814 /* A static data member always has static storage duration and
7815 external linkage. Note that static data members are forbidden in
7816 local classes -- the only situation in which a class has
7817 non-external linkage. */
7818 TREE_PUBLIC (decl
) = 1;
7819 TREE_STATIC (decl
) = 1;
7820 /* For non-template classes, static data members are always put
7821 out in exactly those files where they are defined, just as
7822 with ordinary namespace-scope variables. */
7823 if (!processing_template_decl
)
7824 DECL_INTERFACE_KNOWN (decl
) = 1;
7827 /* Create a VAR_DECL named NAME with the indicated TYPE.
7829 If SCOPE is non-NULL, it is the class type or namespace containing
7830 the variable. If SCOPE is NULL, the variable should is created in
7831 the innermost enclosings scope. */
7834 grokvardecl (tree type
,
7836 const cp_decl_specifier_seq
*declspecs
,
7842 tree explicit_scope
;
7844 gcc_assert (!name
|| identifier_p (name
));
7846 /* Compute the scope in which to place the variable, but remember
7847 whether or not that scope was explicitly specified by the user. */
7848 explicit_scope
= scope
;
7851 /* An explicit "extern" specifier indicates a namespace-scope
7853 if (declspecs
->storage_class
== sc_extern
)
7854 scope
= current_decl_namespace ();
7855 else if (!at_function_scope_p ())
7856 scope
= current_scope ();
7860 && (/* If the variable is a namespace-scope variable declared in a
7861 template, we need DECL_LANG_SPECIFIC. */
7862 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7863 /* Similarly for namespace-scope variables with language linkage
7865 || (TREE_CODE (scope
) == NAMESPACE_DECL
7866 && current_lang_name
!= lang_name_cplusplus
)
7867 /* Similarly for static data members. */
7869 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7871 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7873 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7874 set_decl_namespace (decl
, explicit_scope
, 0);
7876 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7878 if (declspecs
->storage_class
== sc_extern
)
7880 DECL_THIS_EXTERN (decl
) = 1;
7881 DECL_EXTERNAL (decl
) = !initialized
;
7884 if (DECL_CLASS_SCOPE_P (decl
))
7886 set_linkage_for_static_data_member (decl
);
7887 /* This function is only called with out-of-class definitions. */
7888 DECL_EXTERNAL (decl
) = 0;
7889 check_class_member_definition_namespace (decl
);
7891 /* At top level, either `static' or no s.c. makes a definition
7892 (perhaps tentative), and absence of `static' makes it public. */
7893 else if (toplevel_bindings_p ())
7895 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7896 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7897 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7899 /* Not at top level, only `static' makes a static definition. */
7902 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7903 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7906 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7908 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7909 if (declspecs
->gnu_thread_keyword_p
)
7910 DECL_GNU_TLS_P (decl
) = true;
7913 /* If the type of the decl has no linkage, make sure that we'll
7914 notice that in mark_used. */
7915 if (cxx_dialect
> cxx98
7916 && decl_linkage (decl
) != lk_none
7917 && DECL_LANG_SPECIFIC (decl
) == NULL
7918 && !DECL_EXTERN_C_P (decl
)
7919 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7920 retrofit_lang_decl (decl
);
7922 if (TREE_PUBLIC (decl
))
7924 /* [basic.link]: A name with no linkage (notably, the name of a class
7925 or enumeration declared in a local scope) shall not be used to
7926 declare an entity with linkage.
7928 DR 757 relaxes this restriction for C++0x. */
7929 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7930 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7933 if (TYPE_ANONYMOUS_P (t
))
7935 if (DECL_EXTERN_C_P (decl
))
7936 /* Allow this; it's pretty common in C. */
7940 /* DRs 132, 319 and 389 seem to indicate types with
7941 no linkage can only be used to declare extern "C"
7942 entities. Since it's not always an error in the
7943 ISO C++ 90 Standard, we only issue a warning. */
7944 warning (0, "anonymous type with no linkage used to declare "
7945 "variable %q#D with linkage", decl
);
7946 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7947 warning (0, "%q+#D does not refer to the unqualified "
7948 "type, so it is not used for linkage",
7953 warning (0, "type %qT with no linkage used to declare variable "
7954 "%q#D with linkage", t
, decl
);
7958 DECL_INTERFACE_KNOWN (decl
) = 1;
7963 /* Create and return a canonical pointer to member function type, for
7964 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7967 build_ptrmemfunc_type (tree type
)
7971 tree unqualified_variant
= NULL_TREE
;
7973 if (type
== error_mark_node
)
7976 /* If a canonical type already exists for this type, use it. We use
7977 this method instead of type_hash_canon, because it only does a
7978 simple equality check on the list of field members. */
7980 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7983 /* Make sure that we always have the unqualified pointer-to-member
7985 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7987 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7989 t
= make_class_type (RECORD_TYPE
);
7990 xref_basetypes (t
, NULL_TREE
);
7992 /* Let the front end know this is a pointer to member function... */
7993 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7994 /* ... and not really a class type. */
7995 SET_CLASS_TYPE_P (t
, 0);
7997 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8000 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8002 DECL_CHAIN (field
) = fields
;
8005 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8007 /* Zap out the name so that the back end will give us the debugging
8008 information for this anonymous RECORD_TYPE. */
8009 TYPE_NAME (t
) = NULL_TREE
;
8011 /* If this is not the unqualified form of this pointer-to-member
8012 type, set the TYPE_MAIN_VARIANT for this type to be the
8013 unqualified type. Since they are actually RECORD_TYPEs that are
8014 not variants of each other, we must do this manually.
8015 As we just built a new type there is no need to do yet another copy. */
8016 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8018 int type_quals
= cp_type_quals (type
);
8019 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
8020 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
8021 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
8022 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8023 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8024 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8025 TREE_TYPE (TYPE_BINFO (t
)) = t
;
8028 /* Cache this pointer-to-member type so that we can find it again
8030 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8032 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8033 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8034 else if (TYPE_CANONICAL (type
) != type
)
8035 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8040 /* Create and return a pointer to data member type. */
8043 build_ptrmem_type (tree class_type
, tree member_type
)
8045 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8047 cp_cv_quals quals
= type_memfn_quals (member_type
);
8048 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8049 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8050 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8054 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8055 return build_offset_type (class_type
, member_type
);
8059 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8060 Check to see that the definition is valid. Issue appropriate error
8061 messages. Return 1 if the definition is particularly bad, or 0
8065 check_static_variable_definition (tree decl
, tree type
)
8067 /* Can't check yet if we don't know the type. */
8068 if (dependent_type_p (type
))
8070 /* If DECL is declared constexpr, we'll do the appropriate checks
8071 in check_initializer. */
8072 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8074 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8076 if (!COMPLETE_TYPE_P (type
))
8077 error ("in-class initialization of static data member %q#D of "
8078 "incomplete type", decl
);
8079 else if (literal_type_p (type
))
8080 permerror (input_location
,
8081 "%<constexpr%> needed for in-class initialization of "
8082 "static data member %q#D of non-integral type", decl
);
8084 error ("in-class initialization of static data member %q#D of "
8085 "non-literal type", decl
);
8089 /* Motion 10 at San Diego: If a static const integral data member is
8090 initialized with an integral constant expression, the initializer
8091 may appear either in the declaration (within the class), or in
8092 the definition, but not both. If it appears in the class, the
8093 member is a member constant. The file-scope definition is always
8095 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8097 error ("invalid in-class initialization of static data member "
8098 "of non-integral type %qT",
8102 else if (!CP_TYPE_CONST_P (type
))
8103 error ("ISO C++ forbids in-class initialization of non-const "
8104 "static member %qD",
8106 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8107 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8108 "%qD of non-integral type %qT", decl
, type
);
8113 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8114 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8115 expressions out into temporary variables so that walk_tree doesn't
8116 step into them (c++/15764). */
8119 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8121 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8122 tree expr
= *expr_p
;
8123 if (TREE_CODE (expr
) == SAVE_EXPR
)
8125 tree op
= TREE_OPERAND (expr
, 0);
8126 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8127 if (TREE_SIDE_EFFECTS (op
))
8128 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8131 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8136 /* Entry point for the above. */
8139 stabilize_vla_size (tree size
)
8141 struct pointer_set_t
*pset
= pointer_set_create ();
8142 /* Break out any function calls into temporary variables. */
8143 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8144 pointer_set_destroy (pset
);
8147 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8148 not inside of SAVE_EXPR and fold them. */
8151 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8153 tree expr
= *expr_p
;
8154 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8156 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8158 *(bool *)data
= true;
8159 if (SIZEOF_EXPR_TYPE_P (expr
))
8160 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8161 SIZEOF_EXPR
, false);
8162 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8163 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8166 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8168 if (expr
== error_mark_node
)
8169 expr
= size_one_node
;
8176 /* Given the SIZE (i.e., number of elements) in an array, compute an
8177 appropriate index type for the array. If non-NULL, NAME is the
8178 name of the thing being declared. */
8181 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8185 tree abi_1_itype
= NULL_TREE
;
8187 if (error_operand_p (size
))
8188 return error_mark_node
;
8190 if (!type_dependent_expression_p (size
))
8192 tree type
= TREE_TYPE (size
);
8194 mark_rvalue_use (size
);
8196 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8197 && TREE_SIDE_EFFECTS (size
))
8198 /* In C++98, we mark a non-constant array bound with a magic
8199 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8202 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8204 if (CLASS_TYPE_P (type
)
8205 && CLASSTYPE_LITERAL_P (type
))
8207 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8210 if (!(complain
& tf_error
))
8211 return error_mark_node
;
8213 error ("size of array %qD has non-integral type %qT",
8216 error ("size of array has non-integral type %qT", type
);
8217 size
= integer_one_node
;
8219 if (size
== error_mark_node
)
8220 return error_mark_node
;
8221 type
= TREE_TYPE (size
);
8222 /* We didn't support this case in GCC 3.2, so don't bother
8223 trying to model it now in ABI v1. */
8224 abi_1_itype
= error_mark_node
;
8227 size
= maybe_constant_value (size
);
8228 if (!TREE_CONSTANT (size
))
8232 if (error_operand_p (size
))
8233 return error_mark_node
;
8235 /* The array bound must be an integer type. */
8236 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8238 if (!(complain
& tf_error
))
8239 return error_mark_node
;
8241 error ("size of array %qD has non-integral type %qT", name
, type
);
8243 error ("size of array has non-integral type %qT", type
);
8244 size
= integer_one_node
;
8245 type
= TREE_TYPE (size
);
8249 /* A type is dependent if it is...an array type constructed from any
8250 dependent type or whose size is specified by a constant expression
8251 that is value-dependent. */
8252 /* We can only call value_dependent_expression_p on integral constant
8253 expressions; treat non-constant expressions as dependent, too. */
8254 if (processing_template_decl
8255 && (type_dependent_expression_p (size
)
8256 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8258 /* We cannot do any checking for a SIZE that isn't known to be
8259 constant. Just build the index type and mark that it requires
8260 structural equality checks. */
8261 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8262 size
, size_one_node
));
8263 TYPE_DEPENDENT_P (itype
) = 1;
8264 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8265 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8269 if (!abi_version_at_least (2) && processing_template_decl
8270 && abi_1_itype
== NULL_TREE
)
8271 /* For abi-1, we handled all instances in templates the same way,
8272 even when they were non-dependent. This affects the manglings
8273 produced. So, we do the normal checking for non-dependent
8274 sizes, but at the end we'll return the same type that abi-1
8275 would have, but with TYPE_CANONICAL set to the "right"
8276 value that the current ABI would provide. */
8277 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8278 osize
, integer_one_node
));
8280 /* Normally, the array-bound will be a constant. */
8281 if (TREE_CODE (size
) == INTEGER_CST
)
8283 /* Check to see if the array bound overflowed. Make that an
8284 error, no matter how generous we're being. */
8285 constant_expression_error (size
);
8287 /* An array must have a positive number of elements. */
8288 if (INT_CST_LT (size
, integer_zero_node
))
8290 if (!(complain
& tf_error
))
8291 return error_mark_node
;
8293 error ("size of array %qD is negative", name
);
8295 error ("size of array is negative");
8296 size
= integer_one_node
;
8298 /* As an extension we allow zero-sized arrays. */
8299 else if (integer_zerop (size
))
8301 if (!(complain
& tf_error
))
8302 /* We must fail if performing argument deduction (as
8303 indicated by the state of complain), so that
8304 another substitution can be found. */
8305 return error_mark_node
;
8306 else if (in_system_header
)
8307 /* Allow them in system headers because glibc uses them. */;
8309 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8311 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8314 else if (TREE_CONSTANT (size
)
8315 /* We don't allow VLAs at non-function scopes, or during
8316 tentative template substitution. */
8317 || !at_function_scope_p ()
8318 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8320 if (!(complain
& tf_error
))
8321 return error_mark_node
;
8322 /* `(int) &fn' is not a valid array bound. */
8324 error ("size of array %qD is not an integral constant-expression",
8327 error ("size of array is not an integral constant-expression");
8328 size
= integer_one_node
;
8330 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8333 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8335 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8337 else if (warn_vla
> 0)
8341 "variable length array %qD is used", name
);
8344 "variable length array is used");
8347 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8348 /* A variable sized array. */
8349 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8352 HOST_WIDE_INT saved_processing_template_decl
;
8354 /* Compute the index of the largest element in the array. It is
8355 one less than the number of elements in the array. We save
8356 and restore PROCESSING_TEMPLATE_DECL so that computations in
8357 cp_build_binary_op will be appropriately folded. */
8358 saved_processing_template_decl
= processing_template_decl
;
8359 processing_template_decl
= 0;
8360 itype
= cp_build_binary_op (input_location
,
8362 cp_convert (ssizetype
, size
, complain
),
8363 cp_convert (ssizetype
, integer_one_node
,
8366 itype
= fold (itype
);
8367 processing_template_decl
= saved_processing_template_decl
;
8369 if (!TREE_CONSTANT (itype
))
8371 /* A variable sized array. */
8372 itype
= variable_size (itype
);
8374 if (TREE_CODE (itype
) != SAVE_EXPR
)
8376 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8377 they might survive till gimplification. */
8378 tree newitype
= itype
;
8380 cp_walk_tree_without_duplicates (&newitype
,
8381 fold_sizeof_expr_r
, &found
);
8383 itype
= variable_size (fold (newitype
));
8386 stabilize_vla_size (itype
);
8388 if (cxx_dialect
>= cxx1y
)
8390 /* If the VLA bound is larger than half the address space,
8391 or less than zero, throw std::bad_array_length. */
8392 tree comp
= build2 (LT_EXPR
, boolean_type_node
, itype
,
8394 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
8395 throw_bad_array_length (), void_zero_node
);
8396 finish_expr_stmt (comp
);
8398 else if (flag_sanitize
& SANITIZE_VLA
)
8400 /* From C++1y onwards, we throw an exception on a negative
8401 length size of an array; see above. */
8403 /* We have to add 1 -- in the ubsan routine we generate
8404 LE_EXPR rather than LT_EXPR. */
8405 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8406 build_one_cst (TREE_TYPE (itype
)));
8407 t
= fold_build2 (COMPOUND_EXPR
, TREE_TYPE (t
),
8408 ubsan_instrument_vla (input_location
, t
), t
);
8409 finish_expr_stmt (t
);
8412 /* Make sure that there was no overflow when creating to a signed
8413 index type. (For example, on a 32-bit machine, an array with
8414 size 2^32 - 1 is too big.) */
8415 else if (TREE_CODE (itype
) == INTEGER_CST
8416 && TREE_OVERFLOW (itype
))
8418 if (!(complain
& tf_error
))
8419 return error_mark_node
;
8420 error ("overflow in array dimension");
8421 TREE_OVERFLOW (itype
) = 0;
8425 /* Create and return the appropriate index type. */
8426 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8428 tree t
= build_index_type (itype
);
8429 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8430 itype
= abi_1_itype
;
8433 itype
= build_index_type (itype
);
8435 /* If the index type were dependent, we would have returned early, so
8436 remember that it isn't. */
8437 TYPE_DEPENDENT_P (itype
) = 0;
8438 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8442 /* Returns the scope (if any) in which the entity declared by
8443 DECLARATOR will be located. If the entity was declared with an
8444 unqualified name, NULL_TREE is returned. */
8447 get_scope_of_declarator (const cp_declarator
*declarator
)
8449 while (declarator
&& declarator
->kind
!= cdk_id
)
8450 declarator
= declarator
->declarator
;
8452 /* If the declarator-id is a SCOPE_REF, the scope in which the
8453 declaration occurs is the first operand. */
8455 && declarator
->u
.id
.qualifying_scope
)
8456 return declarator
->u
.id
.qualifying_scope
;
8458 /* Otherwise, the declarator is not a qualified name; the entity will
8459 be declared in the current scope. */
8463 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8464 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8468 create_array_type_for_decl (tree name
, tree type
, tree size
)
8470 tree itype
= NULL_TREE
;
8472 /* If things have already gone awry, bail now. */
8473 if (type
== error_mark_node
|| size
== error_mark_node
)
8474 return error_mark_node
;
8476 /* 8.3.4/1: If the type of the identifier of D contains the auto
8477 type-specifier, the program is ill-formed. */
8478 if (pedantic
&& type_uses_auto (type
))
8479 pedwarn (input_location
, OPT_Wpedantic
,
8480 "declaration of %qD as array of %<auto%>", name
);
8482 /* If there are some types which cannot be array elements,
8483 issue an error-message and return. */
8484 switch (TREE_CODE (type
))
8488 error ("declaration of %qD as array of void", name
);
8490 error ("creating array of void");
8491 return error_mark_node
;
8495 error ("declaration of %qD as array of functions", name
);
8497 error ("creating array of functions");
8498 return error_mark_node
;
8500 case REFERENCE_TYPE
:
8502 error ("declaration of %qD as array of references", name
);
8504 error ("creating array of references");
8505 return error_mark_node
;
8509 error ("declaration of %qD as array of function members", name
);
8511 error ("creating array of function members");
8512 return error_mark_node
;
8520 The constant expressions that specify the bounds of the arrays
8521 can be omitted only for the first member of the sequence. */
8522 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8525 error ("declaration of %qD as multidimensional array must "
8526 "have bounds for all dimensions except the first",
8529 error ("multidimensional array must have bounds for all "
8530 "dimensions except the first");
8532 return error_mark_node
;
8535 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
8536 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8538 /* Figure out the index type for the array. */
8540 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8543 T is called the array element type; this type shall not be [...] an
8544 abstract class type. */
8545 abstract_virtuals_error (name
, type
);
8547 return build_cplus_array_type (type
, itype
);
8550 /* Check that it's OK to declare a function with the indicated TYPE.
8551 SFK indicates the kind of special function (if any) that this
8552 function is. OPTYPE is the type given in a conversion operator
8553 declaration, or the class type for a constructor/destructor.
8554 Returns the actual return type of the function; that
8555 may be different than TYPE if an error occurs, or for certain
8556 special functions. */
8559 check_special_function_return_type (special_function_kind sfk
,
8565 case sfk_constructor
:
8567 error ("return type specification for constructor invalid");
8569 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8570 type
= build_pointer_type (optype
);
8572 type
= void_type_node
;
8575 case sfk_destructor
:
8577 error ("return type specification for destructor invalid");
8578 /* We can't use the proper return type here because we run into
8579 problems with ambiguous bases and covariant returns.
8580 Java classes are left unchanged because (void *) isn't a valid
8581 Java type, and we don't want to change the Java ABI. */
8582 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8583 type
= build_pointer_type (void_type_node
);
8585 type
= void_type_node
;
8588 case sfk_conversion
:
8590 error ("return type specified for %<operator %T%>", optype
);
8601 /* A variable or data member (whose unqualified name is IDENTIFIER)
8602 has been declared with the indicated TYPE. If the TYPE is not
8603 acceptable, issue an error message and return a type to use for
8604 error-recovery purposes. */
8607 check_var_type (tree identifier
, tree type
)
8609 if (VOID_TYPE_P (type
))
8612 error ("unnamed variable or field declared void");
8613 else if (identifier_p (identifier
))
8615 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8616 error ("variable or field %qE declared void", identifier
);
8619 error ("variable or field declared void");
8620 type
= error_mark_node
;
8626 /* Functions for adjusting the visibility of a tagged type and its nested
8627 types when it gets a name for linkage purposes from a typedef. */
8629 static void bt_reset_linkage (binding_entry
, void *);
8631 reset_type_linkage (tree type
)
8633 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8634 if (CLASS_TYPE_P (type
))
8635 binding_table_foreach (CLASSTYPE_NESTED_UTDS (type
), bt_reset_linkage
, NULL
);
8638 bt_reset_linkage (binding_entry b
, void */
*data*/
)
8640 reset_type_linkage (b
->type
);
8643 /* Given declspecs and a declarator (abstract or otherwise), determine
8644 the name and type of the object declared and construct a DECL node
8647 DECLSPECS points to the representation of declaration-specifier
8648 sequence that precedes declarator.
8650 DECL_CONTEXT says which syntactic context this declaration is in:
8651 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8652 FUNCDEF for a function definition. Like NORMAL but a few different
8653 error messages in each case. Return value may be zero meaning
8654 this definition is too screwy to try to parse.
8655 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8656 handle member functions (which have FIELD context).
8657 Return value may be zero meaning this definition is too screwy to
8659 PARM for a parameter declaration (either within a function prototype
8660 or before a function body). Make a PARM_DECL, or return void_type_node.
8661 TPARM for a template parameter declaration.
8662 CATCHPARM for a parameter declaration before a catch clause.
8663 TYPENAME if for a typename (in a cast or sizeof).
8664 Don't make a DECL node; just return the ..._TYPE node.
8665 FIELD for a struct or union field; make a FIELD_DECL.
8666 BITFIELD for a field with specified width.
8668 INITIALIZED is as for start_decl.
8670 ATTRLIST is a pointer to the list of attributes, which may be NULL
8671 if there are none; *ATTRLIST may be modified if attributes from inside
8672 the declarator should be applied to the declaration.
8674 When this function is called, scoping variables (such as
8675 CURRENT_CLASS_TYPE) should reflect the scope in which the
8676 declaration occurs, not the scope in which the new declaration will
8677 be placed. For example, on:
8681 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8684 Returns a DECL (if a declarator is present), a TYPE (if there is no
8685 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8689 grokdeclarator (const cp_declarator
*declarator
,
8690 cp_decl_specifier_seq
*declspecs
,
8691 enum decl_context decl_context
,
8695 tree type
= NULL_TREE
;
8697 int explicit_int128
= 0;
8698 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8699 int explicit_int
= 0;
8700 int explicit_char
= 0;
8701 int defaulted_int
= 0;
8703 tree typedef_decl
= NULL_TREE
;
8704 const char *name
= NULL
;
8705 tree typedef_type
= NULL_TREE
;
8706 /* True if this declarator is a function definition. */
8707 bool funcdef_flag
= false;
8708 cp_declarator_kind innermost_code
= cdk_error
;
8711 /* See the code below that used this. */
8712 tree decl_attr
= NULL_TREE
;
8715 /* Keep track of what sort of function is being processed
8716 so that we can warn about default return values, or explicit
8717 return values which do not match prescribed defaults. */
8718 special_function_kind sfk
= sfk_none
;
8720 tree dname
= NULL_TREE
;
8721 tree ctor_return_type
= NULL_TREE
;
8722 enum overload_flags flags
= NO_SPECIAL
;
8723 /* cv-qualifiers that apply to the declarator, for a declaration of
8724 a member function. */
8725 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8726 /* virt-specifiers that apply to the declarator, for a declaration of
8727 a member function. */
8728 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8729 /* ref-qualifier that applies to the declarator, for a declaration of
8730 a member function. */
8731 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8732 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8734 tree raises
= NULL_TREE
;
8735 int template_count
= 0;
8736 tree returned_attrs
= NULL_TREE
;
8737 tree parms
= NULL_TREE
;
8738 const cp_declarator
*id_declarator
;
8739 /* The unqualified name of the declarator; either an
8740 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8741 tree unqualified_id
;
8742 /* The class type, if any, in which this entity is located,
8743 or NULL_TREE if none. Note that this value may be different from
8744 the current class type; for example if an attempt is made to declare
8745 "A::f" inside "B", this value will be "A". */
8746 tree ctype
= current_class_type
;
8747 /* The NAMESPACE_DECL for the namespace in which this entity is
8748 located. If an unqualified name is used to declare the entity,
8749 this value will be NULL_TREE, even if the entity is located at
8751 tree in_namespace
= NULL_TREE
;
8752 cp_storage_class storage_class
;
8753 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8754 bool type_was_error_mark_node
= false;
8755 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8756 bool template_type_arg
= false;
8757 bool template_parm_flag
= false;
8758 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8759 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8760 source_location saved_loc
= input_location
;
8763 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8764 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8765 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8766 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8767 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8768 explicit_int128
= declspecs
->explicit_int128_p
;
8769 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8771 if (decl_context
== FUNCDEF
)
8772 funcdef_flag
= true, decl_context
= NORMAL
;
8773 else if (decl_context
== MEMFUNCDEF
)
8774 funcdef_flag
= true, decl_context
= FIELD
;
8775 else if (decl_context
== BITFIELD
)
8776 bitfield
= 1, decl_context
= FIELD
;
8777 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8778 template_type_arg
= true, decl_context
= TYPENAME
;
8779 else if (decl_context
== TPARM
)
8780 template_parm_flag
= true, decl_context
= PARM
;
8782 if (initialized
> 1)
8783 funcdef_flag
= true;
8785 /* Look inside a declarator for the name being declared
8786 and get it as a string, for an error message. */
8787 for (id_declarator
= declarator
;
8789 id_declarator
= id_declarator
->declarator
)
8791 if (id_declarator
->kind
!= cdk_id
)
8792 innermost_code
= id_declarator
->kind
;
8794 switch (id_declarator
->kind
)
8797 if (id_declarator
->declarator
8798 && id_declarator
->declarator
->kind
== cdk_id
)
8800 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8801 if (sfk
== sfk_destructor
)
8808 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8809 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8812 if (qualifying_scope
)
8814 if (at_function_scope_p ())
8818 A declarator-id shall not be qualified except
8821 None of the cases are permitted in block
8823 if (qualifying_scope
== global_namespace
)
8824 error ("invalid use of qualified-name %<::%D%>",
8826 else if (TYPE_P (qualifying_scope
))
8827 error ("invalid use of qualified-name %<%T::%D%>",
8828 qualifying_scope
, decl
);
8830 error ("invalid use of qualified-name %<%D::%D%>",
8831 qualifying_scope
, decl
);
8832 return error_mark_node
;
8834 else if (TYPE_P (qualifying_scope
))
8836 ctype
= qualifying_scope
;
8837 if (!MAYBE_CLASS_TYPE_P (ctype
))
8839 error ("%q#T is not a class or a namespace", ctype
);
8842 else if (innermost_code
!= cdk_function
8843 && current_class_type
8844 && !uniquely_derived_from_p (ctype
,
8845 current_class_type
))
8847 error ("invalid use of qualified-name %<%T::%D%>",
8848 qualifying_scope
, decl
);
8849 return error_mark_node
;
8852 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8853 in_namespace
= qualifying_scope
;
8855 switch (TREE_CODE (decl
))
8861 if (innermost_code
!= cdk_function
)
8863 error ("declaration of %qD as non-function", decl
);
8864 return error_mark_node
;
8866 else if (!qualifying_scope
8867 && !(current_class_type
&& at_class_scope_p ()))
8869 error ("declaration of %qD as non-member", decl
);
8870 return error_mark_node
;
8873 type
= TREE_OPERAND (decl
, 0);
8875 type
= constructor_name (type
);
8876 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8881 case TEMPLATE_ID_EXPR
:
8883 tree fns
= TREE_OPERAND (decl
, 0);
8886 if (!identifier_p (dname
))
8888 gcc_assert (is_overloaded_fn (dname
));
8889 dname
= DECL_NAME (get_first_fn (dname
));
8894 case IDENTIFIER_NODE
:
8895 if (identifier_p (decl
))
8898 if (C_IS_RESERVED_WORD (dname
))
8900 error ("declarator-id missing; using reserved word %qD",
8902 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8904 else if (!IDENTIFIER_TYPENAME_P (dname
))
8905 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8908 gcc_assert (flags
== NO_SPECIAL
);
8909 flags
= TYPENAME_FLAG
;
8910 ctor_return_type
= TREE_TYPE (dname
);
8911 sfk
= sfk_conversion
;
8912 if (is_typename_at_global_scope (dname
))
8913 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8915 name
= "<invalid operator>";
8932 return error_mark_node
;
8937 if (id_declarator
->kind
== cdk_id
)
8943 The declarator in a function-definition shall have the form
8944 D1 ( parameter-declaration-clause) ... */
8945 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8947 error ("function definition does not declare parameters");
8948 return error_mark_node
;
8951 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8952 && innermost_code
!= cdk_function
8953 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8955 error ("declaration of %qD as non-function", dname
);
8956 return error_mark_node
;
8960 && identifier_p (dname
)
8961 && UDLIT_OPER_P (dname
)
8962 && innermost_code
!= cdk_function
)
8964 error ("declaration of %qD as non-function", dname
);
8965 return error_mark_node
;
8968 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8972 error ("declaration of %qD as %<typedef%>", dname
);
8973 return error_mark_node
;
8975 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8977 error ("declaration of %qD as parameter", dname
);
8978 return error_mark_node
;
8982 /* Anything declared one level down from the top level
8983 must be one of the parameters of a function
8984 (because the body is at least two levels down). */
8986 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8987 by not allowing C++ class definitions to specify their parameters
8988 with xdecls (must be spec.d in the parmlist).
8990 Since we now wait to push a class scope until we are sure that
8991 we are in a legitimate method context, we must set oldcname
8992 explicitly (since current_class_name is not yet alive).
8994 We also want to avoid calling this a PARM if it is in a namespace. */
8996 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8998 cp_binding_level
*b
= current_binding_level
;
8999 current_binding_level
= b
->level_chain
;
9000 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9001 decl_context
= PARM
;
9002 current_binding_level
= b
;
9006 name
= decl_context
== PARM
? "parameter" : "type name";
9008 if (constexpr_p
&& typedef_p
)
9010 error ("%<constexpr%> cannot appear in a typedef declaration");
9011 return error_mark_node
;
9014 /* If there were multiple types specified in the decl-specifier-seq,
9015 issue an error message. */
9016 if (declspecs
->multiple_types_p
)
9018 error ("two or more data types in declaration of %qs", name
);
9019 return error_mark_node
;
9022 if (declspecs
->conflicting_specifiers_p
)
9024 error ("conflicting specifiers in declaration of %qs", name
);
9025 return error_mark_node
;
9028 /* Extract the basic type from the decl-specifier-seq. */
9029 type
= declspecs
->type
;
9030 if (type
== error_mark_node
)
9033 type_was_error_mark_node
= true;
9035 /* If the entire declaration is itself tagged as deprecated then
9036 suppress reports of deprecated items. */
9037 if (type
&& TREE_DEPRECATED (type
)
9038 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9039 warn_deprecated_use (type
, NULL_TREE
);
9040 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9042 typedef_decl
= type
;
9043 type
= TREE_TYPE (typedef_decl
);
9044 if (TREE_DEPRECATED (type
)
9045 && DECL_ARTIFICIAL (typedef_decl
)
9046 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9047 warn_deprecated_use (type
, NULL_TREE
);
9049 /* No type at all: default to `int', and set DEFAULTED_INT
9050 because it was not a user-defined typedef. */
9051 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9053 /* These imply 'int'. */
9054 type
= integer_type_node
;
9058 explicit_int
= declspecs
->explicit_int_p
;
9059 explicit_char
= declspecs
->explicit_char_p
;
9062 /* See the code below that used this. */
9064 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9066 typedef_type
= type
;
9069 if (sfk
!= sfk_conversion
)
9070 ctor_return_type
= ctype
;
9072 if (sfk
!= sfk_none
)
9073 type
= check_special_function_return_type (sfk
, type
,
9075 else if (type
== NULL_TREE
)
9081 /* We handle `main' specially here, because 'main () { }' is so
9082 common. With no options, it is allowed. With -Wreturn-type,
9083 it is a warning. It is only an error with -pedantic-errors. */
9084 is_main
= (funcdef_flag
9085 && dname
&& identifier_p (dname
)
9086 && MAIN_NAME_P (dname
)
9087 && ctype
== NULL_TREE
9088 && in_namespace
== NULL_TREE
9089 && current_namespace
== global_namespace
);
9091 if (type_was_error_mark_node
)
9092 /* We've already issued an error, don't complain more. */;
9093 else if (in_system_header
|| flag_ms_extensions
)
9094 /* Allow it, sigh. */;
9096 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9098 pedwarn (input_location
, OPT_Wpedantic
,
9099 "ISO C++ forbids declaration of %qs with no type", name
);
9101 warning (OPT_Wreturn_type
,
9102 "ISO C++ forbids declaration of %qs with no type", name
);
9104 type
= integer_type_node
;
9109 if (explicit_int128
)
9111 if (int128_integer_type_node
== NULL_TREE
)
9113 error ("%<__int128%> is not supported by this target");
9114 explicit_int128
= false;
9116 else if (pedantic
&& ! in_system_header
)
9117 pedwarn (input_location
, OPT_Wpedantic
,
9118 "ISO C++ does not support %<__int128%> for %qs", name
);
9121 /* Now process the modifiers that were specified
9122 and check for invalid combinations. */
9124 /* Long double is a special combination. */
9125 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9128 type
= cp_build_qualified_type (long_double_type_node
,
9129 cp_type_quals (type
));
9132 /* Check all other uses of type modifiers. */
9134 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9138 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9139 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9140 else if (signed_p
&& unsigned_p
)
9141 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9142 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9143 error ("%<long long%> invalid for %qs", name
);
9144 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9145 error ("%<long%> invalid for %qs", name
);
9146 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9147 error ("%<short%> invalid for %qs", name
);
9148 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9149 error ("%<long%> or %<short%> invalid for %qs", name
);
9150 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9151 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9152 else if ((long_p
|| short_p
) && explicit_char
)
9153 error ("%<long%> or %<short%> specified with char for %qs", name
);
9154 else if (long_p
&& short_p
)
9155 error ("%<long%> and %<short%> specified together for %qs", name
);
9156 else if (type
== char16_type_node
|| type
== char32_type_node
)
9158 if (signed_p
|| unsigned_p
)
9159 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9160 else if (short_p
|| long_p
)
9161 error ("%<short%> or %<long%> invalid for %qs", name
);
9166 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9168 pedwarn (input_location
, OPT_Wpedantic
,
9169 "long, short, signed or unsigned used invalidly for %qs",
9171 if (flag_pedantic_errors
)
9176 /* Discard the type modifiers if they are invalid. */
9187 /* Decide whether an integer type is signed or not.
9188 Optionally treat bitfields as signed by default. */
9192 It is implementation-defined whether a plain (neither
9193 explicitly signed or unsigned) char, short, int, or long
9194 bit-field is signed or unsigned.
9196 Naturally, we extend this to long long as well. Note that
9197 this does not include wchar_t. */
9198 || (bitfield
&& !flag_signed_bitfields
9200 /* A typedef for plain `int' without `signed' can be
9201 controlled just like plain `int', but a typedef for
9202 `signed int' cannot be so controlled. */
9204 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9205 && TREE_CODE (type
) == INTEGER_TYPE
9206 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9208 if (explicit_int128
)
9209 type
= int128_unsigned_type_node
;
9211 type
= long_long_unsigned_type_node
;
9213 type
= long_unsigned_type_node
;
9215 type
= short_unsigned_type_node
;
9216 else if (type
== char_type_node
)
9217 type
= unsigned_char_type_node
;
9218 else if (typedef_decl
)
9219 type
= unsigned_type_for (type
);
9221 type
= unsigned_type_node
;
9223 else if (signed_p
&& type
== char_type_node
)
9224 type
= signed_char_type_node
;
9225 else if (explicit_int128
)
9226 type
= int128_integer_type_node
;
9228 type
= long_long_integer_type_node
;
9230 type
= long_integer_type_node
;
9232 type
= short_integer_type_node
;
9234 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9236 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9237 error ("complex invalid for %qs", name
);
9238 /* If we just have "complex", it is equivalent to
9239 "complex double", but if any modifiers at all are specified it is
9240 the complex form of TYPE. E.g, "complex short" is
9241 "complex short int". */
9242 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9243 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9244 type
= complex_double_type_node
;
9245 else if (type
== integer_type_node
)
9246 type
= complex_integer_type_node
;
9247 else if (type
== float_type_node
)
9248 type
= complex_float_type_node
;
9249 else if (type
== double_type_node
)
9250 type
= complex_double_type_node
;
9251 else if (type
== long_double_type_node
)
9252 type
= complex_long_double_type_node
;
9254 type
= build_complex_type (type
);
9257 type_quals
= TYPE_UNQUALIFIED
;
9258 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9259 type_quals
|= TYPE_QUAL_CONST
;
9260 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9261 type_quals
|= TYPE_QUAL_VOLATILE
;
9262 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9263 type_quals
|= TYPE_QUAL_RESTRICT
;
9264 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9265 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9268 /* If we're using the injected-class-name to form a compound type or a
9269 declaration, replace it with the underlying class so we don't get
9270 redundant typedefs in the debug output. But if we are returning the
9271 type unchanged, leave it alone so that it's available to
9272 maybe_get_template_decl_from_type_decl. */
9273 if (CLASS_TYPE_P (type
)
9274 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9275 && type
== TREE_TYPE (TYPE_NAME (type
))
9276 && (declarator
|| type_quals
))
9277 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9279 type_quals
|= cp_type_quals (type
);
9280 type
= cp_build_qualified_type_real
9281 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9282 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9283 /* We might have ignored or rejected some of the qualifiers. */
9284 type_quals
= cp_type_quals (type
);
9287 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9288 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9289 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9291 storage_class
= declspecs
->storage_class
;
9292 if (storage_class
== sc_static
)
9293 staticp
= 1 + (decl_context
== FIELD
);
9295 if (virtualp
&& staticp
== 2)
9297 error ("member %qD cannot be declared both virtual and static", dname
);
9298 storage_class
= sc_none
;
9301 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9303 /* Issue errors about use of storage classes for parameters. */
9304 if (decl_context
== PARM
)
9308 error ("typedef declaration invalid in parameter declaration");
9309 return error_mark_node
;
9311 else if (template_parm_flag
&& storage_class
!= sc_none
)
9313 error ("storage class specified for template parameter %qs", name
);
9314 return error_mark_node
;
9316 else if (storage_class
== sc_static
9317 || storage_class
== sc_extern
9319 error ("storage class specifiers invalid in parameter declarations");
9321 /* Function parameters cannot be constexpr. If we saw one, moan
9322 and pretend it wasn't there. */
9325 error ("a parameter cannot be declared %<constexpr%>");
9330 /* Give error if `virtual' is used outside of class declaration. */
9332 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9334 error ("%<virtual%> outside class declaration");
9338 /* Static anonymous unions are dealt with here. */
9339 if (staticp
&& decl_context
== TYPENAME
9341 && ANON_AGGR_TYPE_P (declspecs
->type
))
9342 decl_context
= FIELD
;
9344 /* Warn about storage classes that are invalid for certain
9345 kinds of declarations (parameters, typenames, etc.). */
9348 && storage_class
!= sc_extern
9349 && storage_class
!= sc_static
)
9352 error ("multiple storage classes in declaration of %qs", name
);
9355 if (decl_context
!= NORMAL
9356 && ((storage_class
!= sc_none
9357 && storage_class
!= sc_mutable
)
9360 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9361 && (storage_class
== sc_register
9362 || storage_class
== sc_auto
))
9366 else if (decl_context
== FIELD
9367 /* C++ allows static class elements. */
9368 && storage_class
== sc_static
)
9369 /* C++ also allows inlines and signed and unsigned elements,
9370 but in those cases we don't come in here. */
9374 if (decl_context
== FIELD
)
9375 error ("storage class specified for %qs", name
);
9378 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9379 error ("storage class specified for parameter %qs", name
);
9381 error ("storage class specified for typename");
9383 if (storage_class
== sc_register
9384 || storage_class
== sc_auto
9385 || storage_class
== sc_extern
9387 storage_class
= sc_none
;
9390 else if (storage_class
== sc_extern
&& funcdef_flag
9391 && ! toplevel_bindings_p ())
9392 error ("nested function %qs declared %<extern%>", name
);
9393 else if (toplevel_bindings_p ())
9395 if (storage_class
== sc_auto
)
9396 error ("top-level declaration of %qs specifies %<auto%>", name
);
9399 && storage_class
!= sc_extern
9400 && storage_class
!= sc_static
)
9402 if (declspecs
->gnu_thread_keyword_p
)
9403 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9404 "declared %<__thread%>", name
);
9406 /* When thread_local is applied to a variable of block scope the
9407 storage-class-specifier static is implied if it does not appear
9409 storage_class
= declspecs
->storage_class
= sc_static
;
9413 if (storage_class
&& friendp
)
9415 error ("storage class specifiers invalid in friend function declarations");
9416 storage_class
= sc_none
;
9421 unqualified_id
= NULL_TREE
;
9424 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9425 switch (TREE_CODE (unqualified_id
))
9428 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9429 if (TYPE_P (unqualified_id
))
9430 unqualified_id
= constructor_name (unqualified_id
);
9433 case IDENTIFIER_NODE
:
9434 case TEMPLATE_ID_EXPR
:
9442 if (declspecs
->std_attributes
)
9444 /* Apply the c++11 attributes to the type preceding them. */
9445 input_location
= declspecs
->locations
[ds_std_attribute
];
9446 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9447 input_location
= saved_loc
;
9450 /* Determine the type of the entity declared by recurring on the
9452 for (; declarator
; declarator
= declarator
->declarator
)
9454 const cp_declarator
*inner_declarator
;
9457 if (type
== error_mark_node
)
9458 return error_mark_node
;
9460 attrs
= declarator
->attributes
;
9466 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9467 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9468 if (declarator
->kind
== cdk_function
)
9469 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9470 if (declarator
->kind
== cdk_array
)
9471 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9472 returned_attrs
= decl_attributes (&type
,
9473 chainon (returned_attrs
, attrs
),
9477 if (declarator
->kind
== cdk_id
)
9480 inner_declarator
= declarator
->declarator
;
9482 switch (declarator
->kind
)
9485 type
= create_array_type_for_decl (dname
, type
,
9486 declarator
->u
.array
.bounds
);
9487 if (declarator
->std_attributes
)
9490 The optional attribute-specifier-seq appertains to the
9492 returned_attrs
= chainon (returned_attrs
,
9493 declarator
->std_attributes
);
9501 /* Declaring a function type.
9502 Make sure we have a valid type for the function to return. */
9504 if (type_quals
!= TYPE_UNQUALIFIED
)
9506 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9507 warning (OPT_Wignored_qualifiers
,
9508 "type qualifiers ignored on function return type");
9509 /* We now know that the TYPE_QUALS don't apply to the
9510 decl, but to its return type. */
9511 type_quals
= TYPE_UNQUALIFIED
;
9513 errmsg
= targetm
.invalid_return_type (type
);
9517 type
= integer_type_node
;
9520 /* Error about some types functions can't return. */
9522 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9524 error ("%qs declared as function returning a function", name
);
9525 return error_mark_node
;
9527 if (TREE_CODE (type
) == ARRAY_TYPE
)
9529 error ("%qs declared as function returning an array", name
);
9530 return error_mark_node
;
9533 input_location
= declspecs
->locations
[ds_type_spec
];
9534 abstract_virtuals_error (ACU_RETURN
, type
);
9535 input_location
= saved_loc
;
9537 /* Pick up type qualifiers which should be applied to `this'. */
9538 memfn_quals
= declarator
->u
.function
.qualifiers
;
9539 /* Pick up virt-specifiers. */
9540 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9541 /* And ref-qualifier, too */
9542 rqual
= declarator
->u
.function
.ref_qualifier
;
9543 /* Pick up the exception specifications. */
9544 raises
= declarator
->u
.function
.exception_specification
;
9545 /* If the exception-specification is ill-formed, let's pretend
9546 there wasn't one. */
9547 if (raises
== error_mark_node
)
9550 /* Say it's a definition only for the CALL_EXPR
9551 closest to the identifier. */
9552 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9554 /* Handle a late-specified return type. */
9557 if (type_uses_auto (type
))
9559 if (!declarator
->u
.function
.late_return_type
)
9561 if (current_class_type
9562 && LAMBDA_TYPE_P (current_class_type
))
9563 /* OK for C++11 lambdas. */;
9564 else if (cxx_dialect
< cxx1y
)
9565 pedwarn (input_location
, 0, "%qs function uses "
9566 "%<auto%> type specifier without trailing "
9567 "return type", name
);
9569 permerror (input_location
, "virtual function cannot "
9570 "have deduced return type");
9572 else if (!is_auto (type
))
9574 error ("%qs function with trailing return type has"
9575 " %qT as its type rather than plain %<auto%>",
9577 return error_mark_node
;
9580 else if (declarator
->u
.function
.late_return_type
)
9582 if (cxx_dialect
< cxx11
)
9583 /* Not using maybe_warn_cpp0x because this should
9584 always be an error. */
9585 error ("trailing return type only available with "
9586 "-std=c++11 or -std=gnu++11");
9588 error ("%qs function with trailing return type not "
9589 "declared with %<auto%> type specifier", name
);
9590 return error_mark_node
;
9593 type
= splice_late_return_type
9594 (type
, declarator
->u
.function
.late_return_type
);
9595 if (type
== error_mark_node
)
9596 return error_mark_node
;
9598 if (ctype
== NULL_TREE
9599 && decl_context
== FIELD
9601 && (friendp
== 0 || dname
== current_class_name
))
9602 ctype
= current_class_type
;
9604 if (ctype
&& (sfk
== sfk_constructor
9605 || sfk
== sfk_destructor
))
9607 /* We are within a class's scope. If our declarator name
9608 is the same as the class name, and we are defining
9609 a function, then it is a constructor/destructor, and
9610 therefore returns a void type. */
9612 /* ISO C++ 12.4/2. A destructor may not be declared
9613 const or volatile. A destructor may not be static.
9614 A destructor may not be declared with ref-qualifier.
9616 ISO C++ 12.1. A constructor may not be declared
9617 const or volatile. A constructor may not be
9618 virtual. A constructor may not be static.
9619 A constructor may not be declared with ref-qualifier. */
9621 error ((flags
== DTOR_FLAG
)
9622 ? G_("destructor cannot be static member function")
9623 : G_("constructor cannot be static member function"));
9626 error ((flags
== DTOR_FLAG
)
9627 ? G_("destructors may not be cv-qualified")
9628 : G_("constructors may not be cv-qualified"));
9629 memfn_quals
= TYPE_UNQUALIFIED
;
9634 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9635 error ((flags
== DTOR_FLAG
)
9636 ? "destructors may not be ref-qualified"
9637 : "constructors may not be ref-qualified");
9638 rqual
= REF_QUAL_NONE
;
9641 if (decl_context
== FIELD
9642 && !member_function_or_else (ctype
,
9645 return error_mark_node
;
9647 if (flags
!= DTOR_FLAG
)
9649 /* It's a constructor. */
9654 permerror (input_location
, "constructors cannot be declared virtual");
9657 if (decl_context
== FIELD
9658 && sfk
!= sfk_constructor
)
9659 return error_mark_node
;
9661 if (decl_context
== FIELD
)
9667 error ("can%'t initialize friend function %qs", name
);
9670 /* Cannot be both friend and virtual. */
9671 error ("virtual functions cannot be friends");
9674 if (decl_context
== NORMAL
)
9675 error ("friend declaration not in class definition");
9676 if (current_function_decl
&& funcdef_flag
)
9677 error ("can%'t define friend function %qs in a local "
9681 else if (ctype
&& sfk
== sfk_conversion
)
9685 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9690 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9693 if (inner_declarator
9694 && inner_declarator
->kind
== cdk_id
9695 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9696 && arg_types
!= void_list_node
)
9698 error ("destructors may not have parameters");
9699 arg_types
= void_list_node
;
9703 type
= build_function_type (type
, arg_types
);
9704 if (declarator
->std_attributes
)
9707 The optional attribute-specifier-seq appertains to
9708 the function type. */
9709 decl_attributes (&type
, declarator
->std_attributes
,
9717 /* Filter out pointers-to-references and references-to-references.
9718 We can get these if a TYPE_DECL is used. */
9720 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9722 if (declarator
->kind
!= cdk_reference
)
9724 error ("cannot declare pointer to %q#T", type
);
9725 type
= TREE_TYPE (type
);
9728 /* In C++0x, we allow reference to reference declarations
9729 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9730 and template type arguments [14.3.1/4 temp.arg.type]. The
9731 check for direct reference to reference declarations, which
9732 are still forbidden, occurs below. Reasoning behind the change
9733 can be found in DR106, DR540, and the rvalue reference
9735 else if (cxx_dialect
== cxx98
)
9737 error ("cannot declare reference to %q#T", type
);
9738 type
= TREE_TYPE (type
);
9741 else if (VOID_TYPE_P (type
))
9743 if (declarator
->kind
== cdk_reference
)
9744 error ("cannot declare reference to %q#T", type
);
9745 else if (declarator
->kind
== cdk_ptrmem
)
9746 error ("cannot declare pointer to %q#T member", type
);
9749 /* We now know that the TYPE_QUALS don't apply to the decl,
9750 but to the target of the pointer. */
9751 type_quals
= TYPE_UNQUALIFIED
;
9753 /* This code used to handle METHOD_TYPE, but I don't think it's
9754 possible to get it here anymore. */
9755 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9756 if (declarator
->kind
== cdk_ptrmem
9757 && TREE_CODE (type
) == FUNCTION_TYPE
)
9759 memfn_quals
|= type_memfn_quals (type
);
9760 type
= build_memfn_type (type
,
9761 declarator
->u
.pointer
.class_type
,
9764 if (type
== error_mark_node
)
9765 return error_mark_node
;
9767 rqual
= REF_QUAL_NONE
;
9768 memfn_quals
= TYPE_UNQUALIFIED
;
9771 if (TREE_CODE (type
) == FUNCTION_TYPE
9772 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9773 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9774 error (declarator
->kind
== cdk_reference
9775 ? G_("cannot declare reference to qualified function type %qT")
9776 : G_("cannot declare pointer to qualified function type %qT"),
9779 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
9780 pedwarn (input_location
, OPT_Wvla
,
9781 declarator
->kind
== cdk_reference
9782 ? G_("reference to array of runtime bound")
9783 : G_("pointer to array of runtime bound"));
9785 /* When the pointed-to type involves components of variable size,
9786 care must be taken to ensure that the size evaluation code is
9787 emitted early enough to dominate all the possible later uses
9788 and late enough for the variables on which it depends to have
9791 This is expected to happen automatically when the pointed-to
9792 type has a name/declaration of it's own, but special attention
9793 is required if the type is anonymous.
9795 We handle the NORMAL and FIELD contexts here by inserting a
9796 dummy statement that just evaluates the size at a safe point
9797 and ensures it is not deferred until e.g. within a deeper
9798 conditional context (c++/43555).
9800 We expect nothing to be needed here for PARM or TYPENAME.
9801 Evaluating the size at this point for TYPENAME would
9802 actually be incorrect, as we might be in the middle of an
9803 expression with side effects on the pointed-to type size
9804 "arguments" prior to the pointer declaration point and the
9805 size evaluation could end up prior to the side effects. */
9807 if (!TYPE_NAME (type
)
9808 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9809 && at_function_scope_p ()
9810 && variably_modified_type_p (type
, NULL_TREE
))
9811 /* Force evaluation of the SAVE_EXPR. */
9812 finish_expr_stmt (TYPE_SIZE (type
));
9814 if (declarator
->kind
== cdk_reference
)
9816 /* In C++0x, the type we are creating a reference to might be
9817 a typedef which is itself a reference type. In that case,
9818 we follow the reference collapsing rules in
9819 [7.1.3/8 dcl.typedef] to create the final reference type:
9821 "If a typedef TD names a type that is a reference to a type
9822 T, an attempt to create the type 'lvalue reference to cv TD'
9823 creates the type 'lvalue reference to T,' while an attempt
9824 to create the type "rvalue reference to cv TD' creates the
9827 if (VOID_TYPE_P (type
))
9828 /* We already gave an error. */;
9829 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9831 if (declarator
->u
.reference
.rvalue_ref
)
9832 /* Leave type alone. */;
9834 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9837 type
= cp_build_reference_type
9838 (type
, declarator
->u
.reference
.rvalue_ref
);
9840 /* In C++0x, we need this check for direct reference to
9841 reference declarations, which are forbidden by
9842 [8.3.2/5 dcl.ref]. Reference to reference declarations
9843 are only allowed indirectly through typedefs and template
9844 type arguments. Example:
9846 void foo(int & &); // invalid ref-to-ref decl
9848 typedef int & int_ref;
9849 void foo(int_ref &); // valid ref-to-ref decl
9851 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9852 error ("cannot declare reference to %q#T, which is not "
9853 "a typedef or a template type argument", type
);
9855 else if (TREE_CODE (type
) == METHOD_TYPE
)
9856 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9857 else if (declarator
->kind
== cdk_ptrmem
)
9859 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9861 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9862 /* We will already have complained. */
9863 type
= error_mark_node
;
9865 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9869 type
= build_pointer_type (type
);
9871 /* Process a list of type modifier keywords (such as
9872 const or volatile) that were given inside the `*' or `&'. */
9874 if (declarator
->u
.pointer
.qualifiers
)
9877 = cp_build_qualified_type (type
,
9878 declarator
->u
.pointer
.qualifiers
);
9879 type_quals
= cp_type_quals (type
);
9882 /* Apply C++11 attributes to the pointer, and not to the
9883 type pointed to. This is unlike what is done for GNU
9884 attributes above. It is to comply with [dcl.ptr]/1:
9886 [the optional attribute-specifier-seq (7.6.1) appertains
9887 to the pointer and not to the object pointed to]. */
9888 if (declarator
->std_attributes
)
9889 decl_attributes (&type
, declarator
->std_attributes
,
9903 /* A `constexpr' specifier used in an object declaration declares
9904 the object as `const'. */
9905 if (constexpr_p
&& innermost_code
!= cdk_function
)
9907 if (type_quals
& TYPE_QUAL_VOLATILE
)
9908 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9909 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9911 type_quals
|= TYPE_QUAL_CONST
;
9912 type
= cp_build_qualified_type (type
, type_quals
);
9916 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9917 && TREE_CODE (type
) != FUNCTION_TYPE
9918 && TREE_CODE (type
) != METHOD_TYPE
)
9920 error ("template-id %qD used as a declarator",
9922 unqualified_id
= dname
;
9925 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9926 qualified with a class-name, turn it into a METHOD_TYPE, unless
9927 we know that the function is static. We take advantage of this
9928 opportunity to do other processing that pertains to entities
9929 explicitly declared to be class members. Note that if DECLARATOR
9930 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9931 would not have exited the loop above. */
9933 && declarator
->u
.id
.qualifying_scope
9934 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9936 ctype
= declarator
->u
.id
.qualifying_scope
;
9937 ctype
= TYPE_MAIN_VARIANT (ctype
);
9938 template_count
= num_template_headers_for_class (ctype
);
9940 if (ctype
== current_class_type
)
9944 permerror (input_location
, "member functions are implicitly friends of their class");
9948 permerror (declarator
->id_loc
,
9949 "extra qualification %<%T::%> on member %qs",
9952 else if (/* If the qualifying type is already complete, then we
9953 can skip the following checks. */
9954 !COMPLETE_TYPE_P (ctype
)
9955 && (/* If the function is being defined, then
9956 qualifying type must certainly be complete. */
9958 /* A friend declaration of "T::f" is OK, even if
9959 "T" is a template parameter. But, if this
9960 function is not a friend, the qualifying type
9962 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9963 /* For a declaration, the type need not be
9964 complete, if either it is dependent (since there
9965 is no meaningful definition of complete in that
9966 case) or the qualifying class is currently being
9968 || !(dependent_type_p (ctype
)
9969 || currently_open_class (ctype
)))
9970 /* Check that the qualifying type is complete. */
9971 && !complete_type_or_else (ctype
, NULL_TREE
))
9972 return error_mark_node
;
9973 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9975 if (current_class_type
9976 && (!friendp
|| funcdef_flag
))
9979 ? G_("cannot define member function %<%T::%s%> "
9981 : G_("cannot declare member function %<%T::%s%> "
9983 ctype
, name
, current_class_type
);
9984 return error_mark_node
;
9987 else if (typedef_p
&& current_class_type
)
9989 error ("cannot declare member %<%T::%s%> within %qT",
9990 ctype
, name
, current_class_type
);
9991 return error_mark_node
;
9995 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9996 ctype
= current_class_type
;
9998 /* Now TYPE has the actual type. */
10000 if (returned_attrs
)
10003 *attrlist
= chainon (returned_attrs
, *attrlist
);
10005 attrlist
= &returned_attrs
;
10009 && declarator
->kind
== cdk_id
10010 && declarator
->std_attributes
)
10011 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10012 a declarator-id appertains to the entity that is declared. */
10013 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10015 /* Handle parameter packs. */
10016 if (parameter_pack_p
)
10018 if (decl_context
== PARM
)
10019 /* Turn the type into a pack expansion.*/
10020 type
= make_pack_expansion (type
);
10022 error ("non-parameter %qs cannot be a parameter pack", name
);
10025 /* Did array size calculations overflow or does the array cover more
10026 than half of the address-space? */
10027 if (TREE_CODE (type
) == ARRAY_TYPE
10028 && COMPLETE_TYPE_P (type
)
10029 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10030 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10032 error ("size of array %qs is too large", name
);
10033 /* If we proceed with the array type as it is, we'll eventually
10034 crash in tree_to_uhwi (). */
10035 type
= error_mark_node
;
10038 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10039 && !processing_template_decl
10040 && variably_modified_type_p (type
, NULL_TREE
))
10042 if (decl_context
== FIELD
)
10043 error ("data member may not have variably modified type %qT", type
);
10045 error ("parameter may not have variably modified type %qT", type
);
10046 type
= error_mark_node
;
10049 if (explicitp
== 1 || (explicitp
&& friendp
))
10051 /* [dcl.fct.spec] The explicit specifier shall only be used in
10052 declarations of constructors within a class definition. */
10053 error ("only declarations of constructors can be %<explicit%>");
10057 if (storage_class
== sc_mutable
)
10059 if (decl_context
!= FIELD
|| friendp
)
10061 error ("non-member %qs cannot be declared %<mutable%>", name
);
10062 storage_class
= sc_none
;
10064 else if (decl_context
== TYPENAME
|| typedef_p
)
10066 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10067 storage_class
= sc_none
;
10069 else if (TREE_CODE (type
) == FUNCTION_TYPE
10070 || TREE_CODE (type
) == METHOD_TYPE
)
10072 error ("function %qs cannot be declared %<mutable%>", name
);
10073 storage_class
= sc_none
;
10077 error ("static %qs cannot be declared %<mutable%>", name
);
10078 storage_class
= sc_none
;
10080 else if (type_quals
& TYPE_QUAL_CONST
)
10082 error ("const %qs cannot be declared %<mutable%>", name
);
10083 storage_class
= sc_none
;
10085 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10087 permerror (input_location
, "reference %qs cannot be declared "
10088 "%<mutable%>", name
);
10089 storage_class
= sc_none
;
10093 /* If this is declaring a typedef name, return a TYPE_DECL. */
10094 if (typedef_p
&& decl_context
!= TYPENAME
)
10098 /* Note that the grammar rejects storage classes
10099 in typenames, fields or parameters. */
10100 if (current_lang_name
== lang_name_java
)
10101 TYPE_FOR_JAVA (type
) = 1;
10103 /* This declaration:
10105 typedef void f(int) const;
10107 declares a function type which is not a member of any
10108 particular class, but which is cv-qualified; for
10109 example "f S::*" declares a pointer to a const-qualified
10110 member function of S. We record the cv-qualification in the
10112 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10114 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10116 /* We have now dealt with these qualifiers. */
10117 memfn_quals
= TYPE_UNQUALIFIED
;
10118 rqual
= REF_QUAL_NONE
;
10121 if (type_uses_auto (type
))
10123 error ("typedef declared %<auto%>");
10124 type
= error_mark_node
;
10127 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
))
10128 pedwarn (input_location
, OPT_Wvla
,
10129 "typedef naming array of runtime bound");
10131 if (decl_context
== FIELD
)
10132 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10134 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10135 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10136 error_at (DECL_SOURCE_LOCATION (decl
),
10137 "typedef name may not be a nested-name-specifier");
10138 TREE_TYPE (decl
) = error_mark_node
;
10141 if (decl_context
!= FIELD
)
10143 if (!current_function_decl
)
10144 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10145 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10146 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10147 (current_function_decl
)))
10148 /* The TYPE_DECL is "abstract" because there will be
10149 clones of this constructor/destructor, and there will
10150 be copies of this TYPE_DECL generated in those
10152 DECL_ABSTRACT (decl
) = 1;
10154 else if (current_class_type
10155 && constructor_name_p (unqualified_id
, current_class_type
))
10156 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10157 "as enclosing class",
10160 /* If the user declares "typedef struct {...} foo" then the
10161 struct will have an anonymous name. Fill that name in now.
10162 Nothing can refer to it, so nothing needs know about the name
10164 if (type
!= error_mark_node
10166 && TYPE_NAME (type
)
10167 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10168 && TYPE_ANONYMOUS_P (type
)
10169 && declspecs
->type_definition_p
10170 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10174 /* Replace the anonymous name with the real name everywhere. */
10175 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10177 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10178 /* We do not rename the debug info representing the
10179 anonymous tagged type because the standard says in
10180 [dcl.typedef] that the naming applies only for
10181 linkage purposes. */
10182 /*debug_hooks->set_name (t, decl);*/
10183 TYPE_NAME (t
) = decl
;
10186 if (TYPE_LANG_SPECIFIC (type
))
10187 TYPE_WAS_ANONYMOUS (type
) = 1;
10189 /* If this is a typedef within a template class, the nested
10190 type is a (non-primary) template. The name for the
10191 template needs updating as well. */
10192 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10193 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10194 = TYPE_IDENTIFIER (type
);
10196 /* Adjust linkage now that we aren't anonymous anymore. */
10197 reset_type_linkage (type
);
10199 /* FIXME remangle member functions; member functions of a
10200 type with external linkage have external linkage. */
10204 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10205 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10207 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10208 memfn_quals
!= TYPE_UNQUALIFIED
,
10209 inlinep
, friendp
, raises
!= NULL_TREE
);
10211 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10212 /* Acknowledge that this was written:
10213 `using analias = atype;'. */
10214 TYPE_DECL_ALIAS_P (decl
) = 1;
10219 /* Detect the case of an array type of unspecified size
10220 which came, as such, direct from a typedef name.
10221 We must copy the type, so that the array's domain can be
10222 individually set by the object's initializer. */
10224 if (type
&& typedef_type
10225 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10226 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10227 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10229 /* Detect where we're using a typedef of function type to declare a
10230 function. PARMS will not be set, so we must create it now. */
10232 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10234 tree decls
= NULL_TREE
;
10237 for (args
= TYPE_ARG_TYPES (type
);
10238 args
&& args
!= void_list_node
;
10239 args
= TREE_CHAIN (args
))
10241 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10243 DECL_CHAIN (decl
) = decls
;
10247 parms
= nreverse (decls
);
10249 if (decl_context
!= TYPENAME
)
10251 /* A cv-qualifier-seq shall only be part of the function type
10252 for a non-static member function. A ref-qualifier shall only
10253 .... /same as above/ [dcl.fct] */
10254 if ((type_memfn_quals (type
) != TYPE_UNQUALIFIED
10255 || type_memfn_rqual (type
) != REF_QUAL_NONE
)
10256 && (current_class_type
== NULL_TREE
|| staticp
) )
10259 ? G_("qualified function types cannot be used to "
10260 "declare static member functions")
10261 : G_("qualified function types cannot be used to "
10262 "declare free functions"));
10263 type
= TYPE_MAIN_VARIANT (type
);
10266 /* The qualifiers on the function type become the qualifiers on
10267 the non-static member function. */
10268 memfn_quals
|= type_memfn_quals (type
);
10269 rqual
= type_memfn_rqual (type
);
10270 type_quals
= TYPE_UNQUALIFIED
;
10274 /* If this is a type name (such as, in a cast or sizeof),
10275 compute the type and return it now. */
10277 if (decl_context
== TYPENAME
)
10279 /* Note that the grammar rejects storage classes
10280 in typenames, fields or parameters. */
10281 if (type_quals
!= TYPE_UNQUALIFIED
)
10282 type_quals
= TYPE_UNQUALIFIED
;
10284 /* Special case: "friend class foo" looks like a TYPENAME context. */
10287 if (type_quals
!= TYPE_UNQUALIFIED
)
10289 error ("type qualifiers specified for friend class declaration");
10290 type_quals
= TYPE_UNQUALIFIED
;
10294 error ("%<inline%> specified for friend class declaration");
10300 /* Don't allow friend declaration without a class-key. */
10301 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10302 permerror (input_location
, "template parameters cannot be friends");
10303 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10304 permerror (input_location
, "friend declaration requires class-key, "
10305 "i.e. %<friend class %T::%D%>",
10306 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10308 permerror (input_location
, "friend declaration requires class-key, "
10309 "i.e. %<friend %#T%>",
10313 /* Only try to do this stuff if we didn't already give up. */
10314 if (type
!= integer_type_node
)
10316 /* A friendly class? */
10317 if (current_class_type
)
10318 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10319 /*complain=*/true);
10321 error ("trying to make class %qT a friend of global scope",
10324 type
= void_type_node
;
10327 else if (memfn_quals
|| rqual
)
10329 if (ctype
== NULL_TREE
10330 && TREE_CODE (type
) == METHOD_TYPE
)
10331 ctype
= TYPE_METHOD_BASETYPE (type
);
10334 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10335 /* Core issue #547: need to allow this in template type args.
10336 Allow it in general in C++11 for alias-declarations. */
10337 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10338 && TREE_CODE (type
) == FUNCTION_TYPE
)
10339 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10341 error ("invalid qualifiers on non-member function type");
10346 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10347 && decl_context
!= CATCHPARM
10348 && TREE_CODE (type
) != UNION_TYPE
10351 error ("abstract declarator %qT used as declaration", type
);
10352 return error_mark_node
;
10355 /* Only functions may be declared using an operator-function-id. */
10357 && IDENTIFIER_OPNAME_P (unqualified_id
)
10358 && TREE_CODE (type
) != FUNCTION_TYPE
10359 && TREE_CODE (type
) != METHOD_TYPE
)
10361 error ("declaration of %qD as non-function", unqualified_id
);
10362 return error_mark_node
;
10365 /* We don't check parameter types here because we can emit a better
10366 error message later. */
10367 if (decl_context
!= PARM
)
10369 type
= check_var_type (unqualified_id
, type
);
10370 if (type
== error_mark_node
)
10371 return error_mark_node
;
10374 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10375 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10377 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10379 if (ctype
|| in_namespace
)
10380 error ("cannot use %<::%> in parameter declaration");
10382 if (type_uses_auto (type
))
10384 if (template_parm_flag
)
10386 error ("template parameter declared %<auto%>");
10387 type
= error_mark_node
;
10389 else if (decl_context
== CATCHPARM
)
10391 error ("catch parameter declared %<auto%>");
10392 type
= error_mark_node
;
10394 else if (current_class_type
&& LAMBDA_TYPE_P (current_class_type
))
10396 if (cxx_dialect
< cxx1y
)
10397 pedwarn (location_of (type
), 0,
10398 "use of %<auto%> in lambda parameter declaration "
10399 "only available with "
10400 "-std=c++1y or -std=gnu++1y");
10402 else if (cxx_dialect
< cxx1y
)
10403 pedwarn (location_of (type
), 0,
10404 "use of %<auto%> in parameter declaration "
10405 "only available with "
10406 "-std=c++1y or -std=gnu++1y");
10408 pedwarn (location_of (type
), OPT_Wpedantic
,
10409 "ISO C++ forbids use of %<auto%> in parameter "
10413 /* A parameter declared as an array of T is really a pointer to T.
10414 One declared as a function is really a pointer to a function.
10415 One declared as a member is really a pointer to member. */
10417 if (TREE_CODE (type
) == ARRAY_TYPE
)
10419 /* Transfer const-ness of array into that of type pointed to. */
10420 type
= build_pointer_type (TREE_TYPE (type
));
10421 type_quals
= TYPE_UNQUALIFIED
;
10423 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10424 type
= build_pointer_type (type
);
10427 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10428 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10430 cp_cv_quals real_quals
= memfn_quals
;
10431 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10432 real_quals
|= TYPE_QUAL_CONST
;
10433 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10439 if (decl_context
== PARM
)
10441 decl
= cp_build_parm_decl (unqualified_id
, type
);
10443 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10444 memfn_quals
!= TYPE_UNQUALIFIED
,
10445 inlinep
, friendp
, raises
!= NULL_TREE
);
10447 else if (decl_context
== FIELD
)
10449 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10450 && type_uses_auto (type
))
10452 error ("non-static data member declared %<auto%>");
10453 type
= error_mark_node
;
10456 /* The C99 flexible array extension. */
10457 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10458 && TYPE_DOMAIN (type
) == NULL_TREE
)
10460 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10461 tf_warning_or_error
);
10462 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10465 if (type
== error_mark_node
)
10467 /* Happens when declaring arrays of sizes which
10468 are error_mark_node, for example. */
10471 else if (in_namespace
&& !friendp
)
10473 /* Something like struct S { int N::j; }; */
10474 error ("invalid use of %<::%>");
10475 return error_mark_node
;
10477 else if (TREE_CODE (type
) == FUNCTION_TYPE
10478 || TREE_CODE (type
) == METHOD_TYPE
)
10481 tree function_context
;
10485 /* This should never happen in pure C++ (the check
10486 could be an assert). It could happen in
10487 Objective-C++ if someone writes invalid code that
10488 uses a function declaration for an instance
10489 variable or property (instance variables and
10490 properties are parsed as FIELD_DECLs, but they are
10491 part of an Objective-C class, not a C++ class).
10492 That code is invalid and is caught by this
10496 error ("declaration of function %qD in invalid context",
10498 return error_mark_node
;
10501 /* ``A union may [ ... ] not [ have ] virtual functions.''
10503 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10505 error ("function %qD declared virtual inside a union",
10507 return error_mark_node
;
10510 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10514 error ("%qD cannot be declared virtual, since it "
10515 "is always static",
10522 /* Check that the name used for a destructor makes sense. */
10523 if (sfk
== sfk_destructor
)
10525 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10529 gcc_assert (friendp
);
10530 error ("expected qualified name in friend declaration "
10531 "for destructor %qD", uqname
);
10532 return error_mark_node
;
10535 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10537 error ("declaration of %qD as member of %qT",
10539 return error_mark_node
;
10543 error ("a destructor cannot be %<constexpr%>");
10544 return error_mark_node
;
10547 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10549 error ("expected qualified name in friend declaration "
10550 "for constructor %qD",
10551 id_declarator
->u
.id
.unqualified_name
);
10552 return error_mark_node
;
10555 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10556 function_context
= (ctype
!= NULL_TREE
) ?
10557 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10558 publicp
= (! friendp
|| ! staticp
)
10559 && function_context
== NULL_TREE
;
10560 decl
= grokfndecl (ctype
, type
,
10561 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10562 ? unqualified_id
: dname
,
10565 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10566 friendp
? -1 : 0, friendp
, publicp
,
10567 inlinep
| (2 * constexpr_p
),
10569 funcdef_flag
, template_count
, in_namespace
,
10570 attrlist
, declarator
->id_loc
);
10571 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10572 if (decl
== NULL_TREE
)
10573 return error_mark_node
;
10575 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10576 /* The decl and setting of decl_attr is also turned off. */
10577 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10580 /* [class.conv.ctor]
10582 A constructor declared without the function-specifier
10583 explicit that can be called with a single parameter
10584 specifies a conversion from the type of its first
10585 parameter to the type of its class. Such a constructor
10586 is called a converting constructor. */
10587 if (explicitp
== 2)
10588 DECL_NONCONVERTING_P (decl
) = 1;
10590 else if (!staticp
&& !dependent_type_p (type
)
10591 && !COMPLETE_TYPE_P (complete_type (type
))
10592 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10594 if (unqualified_id
)
10595 error ("field %qD has incomplete type %qT",
10596 unqualified_id
, type
);
10598 error ("name %qT has incomplete type", type
);
10600 type
= error_mark_node
;
10607 error ("%qE is neither function nor member function; "
10608 "cannot be declared friend", unqualified_id
);
10616 /* Friends are treated specially. */
10617 if (ctype
== current_class_type
)
10618 ; /* We already issued a permerror. */
10619 else if (decl
&& DECL_NAME (decl
))
10621 if (template_class_depth (current_class_type
) == 0)
10623 decl
= check_explicit_specialization
10624 (unqualified_id
, decl
, template_count
,
10625 2 * funcdef_flag
+ 4);
10626 if (decl
== error_mark_node
)
10627 return error_mark_node
;
10630 decl
= do_friend (ctype
, unqualified_id
, decl
,
10636 return error_mark_node
;
10639 /* Structure field. It may not be a function, except for C++. */
10641 if (decl
== NULL_TREE
)
10645 /* C++ allows static class members. All other work
10646 for this is done by grokfield. */
10647 decl
= build_lang_decl_loc (declarator
->id_loc
,
10648 VAR_DECL
, unqualified_id
, type
);
10649 set_linkage_for_static_data_member (decl
);
10650 /* Even if there is an in-class initialization, DECL
10651 is considered undefined until an out-of-class
10652 definition is provided. */
10653 DECL_EXTERNAL (decl
) = 1;
10657 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10658 if (declspecs
->gnu_thread_keyword_p
)
10659 DECL_GNU_TLS_P (decl
) = true;
10662 if (constexpr_p
&& !initialized
)
10664 error ("constexpr static data member %qD must have an "
10665 "initializer", decl
);
10666 constexpr_p
= false;
10673 error ("non-static data member %qE declared %<constexpr%>",
10675 constexpr_p
= false;
10677 decl
= build_decl (input_location
,
10678 FIELD_DECL
, unqualified_id
, type
);
10679 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10680 if (bitfield
&& !unqualified_id
)
10681 TREE_NO_WARNING (decl
) = 1;
10683 if (storage_class
== sc_mutable
)
10685 DECL_MUTABLE_P (decl
) = 1;
10686 storage_class
= sc_none
;
10691 /* An attempt is being made to initialize a non-static
10692 member. This is new in C++11. */
10693 maybe_warn_cpp0x (CPP0X_NSDMI
);
10695 /* If this has been parsed with static storage class, but
10696 errors forced staticp to be cleared, ensure NSDMI is
10698 if (declspecs
->storage_class
== sc_static
)
10699 DECL_INITIAL (decl
) = error_mark_node
;
10703 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10704 memfn_quals
!= TYPE_UNQUALIFIED
,
10705 inlinep
, friendp
, raises
!= NULL_TREE
);
10708 else if (TREE_CODE (type
) == FUNCTION_TYPE
10709 || TREE_CODE (type
) == METHOD_TYPE
)
10711 tree original_name
;
10714 if (!unqualified_id
)
10715 return error_mark_node
;
10717 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10718 original_name
= dname
;
10720 original_name
= unqualified_id
;
10722 if (storage_class
== sc_auto
)
10723 error ("storage class %<auto%> invalid for function %qs", name
);
10724 else if (storage_class
== sc_register
)
10725 error ("storage class %<register%> invalid for function %qs", name
);
10728 if (declspecs
->gnu_thread_keyword_p
)
10729 error ("storage class %<__thread%> invalid for function %qs",
10732 error ("storage class %<thread_local%> invalid for function %qs",
10736 if (virt_specifiers
)
10737 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10738 /* Function declaration not at top level.
10739 Storage classes other than `extern' are not allowed
10740 and `extern' makes no difference. */
10741 if (! toplevel_bindings_p ()
10742 && (storage_class
== sc_static
10743 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10746 if (storage_class
== sc_static
)
10747 pedwarn (input_location
, OPT_Wpedantic
,
10748 "%<static%> specified invalid for function %qs "
10749 "declared out of global scope", name
);
10751 pedwarn (input_location
, OPT_Wpedantic
,
10752 "%<inline%> specifier invalid for function %qs "
10753 "declared out of global scope", name
);
10756 if (ctype
== NULL_TREE
)
10760 error ("virtual non-class function %qs", name
);
10763 else if (sfk
== sfk_constructor
10764 || sfk
== sfk_destructor
)
10766 error (funcdef_flag
10767 ? G_("%qs defined in a non-class scope")
10768 : G_("%qs declared in a non-class scope"), name
);
10773 /* Record whether the function is public. */
10774 publicp
= (ctype
!= NULL_TREE
10775 || storage_class
!= sc_static
);
10777 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10778 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10780 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10782 template_count
, in_namespace
, attrlist
,
10783 declarator
->id_loc
);
10784 if (decl
== NULL_TREE
)
10785 return error_mark_node
;
10789 int invalid_static
= 0;
10791 /* Don't allow a static member function in a class, and forbid
10792 declaring main to be static. */
10793 if (TREE_CODE (type
) == METHOD_TYPE
)
10795 permerror (input_location
, "cannot declare member function %qD to have "
10796 "static linkage", decl
);
10797 invalid_static
= 1;
10799 else if (current_function_decl
)
10801 /* FIXME need arm citation */
10802 error ("cannot declare static function inside another function");
10803 invalid_static
= 1;
10806 if (invalid_static
)
10809 storage_class
= sc_none
;
10815 /* It's a variable. */
10817 /* An uninitialized decl with `extern' is a reference. */
10818 decl
= grokvardecl (type
, unqualified_id
,
10821 (type_quals
& TYPE_QUAL_CONST
) != 0,
10822 ctype
? ctype
: in_namespace
);
10823 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10824 memfn_quals
!= TYPE_UNQUALIFIED
,
10825 inlinep
, friendp
, raises
!= NULL_TREE
);
10829 DECL_CONTEXT (decl
) = ctype
;
10832 permerror (input_location
, "%<static%> may not be used when defining "
10833 "(as opposed to declaring) a static data member");
10835 storage_class
= sc_none
;
10837 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10839 error ("static member %qD declared %<register%>", decl
);
10840 storage_class
= sc_none
;
10842 if (storage_class
== sc_extern
&& pedantic
)
10844 pedwarn (input_location
, OPT_Wpedantic
,
10845 "cannot explicitly declare member %q#D to have "
10846 "extern linkage", decl
);
10847 storage_class
= sc_none
;
10850 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10852 error ("declaration of constexpr variable %qD is not a definition",
10854 constexpr_p
= false;
10858 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10860 if (toplevel_bindings_p ())
10862 /* It's common practice (and completely valid) to have a const
10863 be initialized and declared extern. */
10864 if (!(type_quals
& TYPE_QUAL_CONST
))
10865 warning (0, "%qs initialized and declared %<extern%>", name
);
10869 error ("%qs has both %<extern%> and initializer", name
);
10870 return error_mark_node
;
10874 /* Record `register' declaration for warnings on &
10875 and in case doing stupid register allocation. */
10877 if (storage_class
== sc_register
)
10878 DECL_REGISTER (decl
) = 1;
10879 else if (storage_class
== sc_extern
)
10880 DECL_THIS_EXTERN (decl
) = 1;
10881 else if (storage_class
== sc_static
)
10882 DECL_THIS_STATIC (decl
) = 1;
10884 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10885 if (constexpr_p
&& VAR_P (decl
))
10886 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10888 /* Record constancy and volatility on the DECL itself . There's
10889 no need to do this when processing a template; we'll do this
10890 for the instantiated declaration based on the type of DECL. */
10891 if (!processing_template_decl
)
10892 cp_apply_type_quals_to_decl (type_quals
, decl
);
10898 /* Subroutine of start_function. Ensure that each of the parameter
10899 types (as listed in PARMS) is complete, as is required for a
10900 function definition. */
10903 require_complete_types_for_parms (tree parms
)
10905 for (; parms
; parms
= DECL_CHAIN (parms
))
10907 if (dependent_type_p (TREE_TYPE (parms
)))
10909 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10910 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10912 relayout_decl (parms
);
10913 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10916 /* grokparms or complete_type_or_else will have already issued
10918 TREE_TYPE (parms
) = error_mark_node
;
10922 /* Returns nonzero if T is a local variable. */
10925 local_variable_p (const_tree t
)
10928 /* A VAR_DECL with a context that is a _TYPE is a static data
10930 && !TYPE_P (CP_DECL_CONTEXT (t
))
10931 /* Any other non-local variable must be at namespace scope. */
10932 && !DECL_NAMESPACE_SCOPE_P (t
))
10933 || (TREE_CODE (t
) == PARM_DECL
))
10939 /* Like local_variable_p, but suitable for use as a tree-walking
10943 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10946 if (local_variable_p (*tp
)
10947 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
10949 else if (TYPE_P (*tp
))
10950 *walk_subtrees
= 0;
10955 /* Check that ARG, which is a default-argument expression for a
10956 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10957 something goes wrong. DECL may also be a _TYPE node, rather than a
10958 DECL, if there is no DECL available. */
10961 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
10966 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10967 /* We get a DEFAULT_ARG when looking at an in-class declaration
10968 with a default argument. Ignore the argument for now; we'll
10969 deal with it after the class is complete. */
10978 decl_type
= TREE_TYPE (decl
);
10980 if (arg
== error_mark_node
10981 || decl
== error_mark_node
10982 || TREE_TYPE (arg
) == error_mark_node
10983 || decl_type
== error_mark_node
)
10984 /* Something already went wrong. There's no need to check
10986 return error_mark_node
;
10988 /* [dcl.fct.default]
10990 A default argument expression is implicitly converted to the
10992 ++cp_unevaluated_operand
;
10993 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
10995 --cp_unevaluated_operand
;
10997 if (warn_zero_as_null_pointer_constant
10998 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10999 && null_ptr_cst_p (arg
)
11000 && (complain
& tf_warning
)
11001 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11002 return nullptr_node
;
11004 /* [dcl.fct.default]
11006 Local variables shall not be used in default argument
11009 The keyword `this' shall not be used in a default argument of a
11010 member function. */
11011 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11014 if (complain
& tf_warning_or_error
)
11016 if (DECL_NAME (var
) == this_identifier
)
11017 permerror (input_location
, "default argument %qE uses %qD",
11020 error ("default argument %qE uses local variable %qD", arg
, var
);
11022 return error_mark_node
;
11029 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11032 type_is_deprecated (tree type
)
11034 enum tree_code code
;
11035 if (TREE_DEPRECATED (type
))
11037 if (TYPE_NAME (type
)
11038 && TREE_DEPRECATED (TYPE_NAME (type
)))
11041 /* Do warn about using typedefs to a deprecated class. */
11042 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11043 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11045 code
= TREE_CODE (type
);
11047 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11048 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11049 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11050 return type_is_deprecated (TREE_TYPE (type
));
11052 if (TYPE_PTRMEMFUNC_P (type
))
11053 return type_is_deprecated
11054 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11059 /* Decode the list of parameter types for a function type.
11060 Given the list of things declared inside the parens,
11061 return a list of types.
11063 If this parameter does not end with an ellipsis, we append
11066 *PARMS is set to the chain of PARM_DECLs created. */
11069 grokparms (tree parmlist
, tree
*parms
)
11071 tree result
= NULL_TREE
;
11072 tree decls
= NULL_TREE
;
11076 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11078 tree type
= NULL_TREE
;
11079 tree init
= TREE_PURPOSE (parm
);
11080 tree decl
= TREE_VALUE (parm
);
11081 const char *errmsg
;
11083 if (parm
== void_list_node
)
11086 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11089 type
= TREE_TYPE (decl
);
11090 if (VOID_TYPE_P (type
))
11092 if (same_type_p (type
, void_type_node
)
11093 && DECL_SELF_REFERENCE_P (type
)
11094 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11095 /* this is a parmlist of `(void)', which is ok. */
11097 cxx_incomplete_type_error (decl
, type
);
11098 /* It's not a good idea to actually create parameters of
11099 type `void'; other parts of the compiler assume that a
11100 void type terminates the parameter list. */
11101 type
= error_mark_node
;
11102 TREE_TYPE (decl
) = error_mark_node
;
11105 if (type
!= error_mark_node
11106 && TYPE_FOR_JAVA (type
)
11107 && MAYBE_CLASS_TYPE_P (type
))
11109 error ("parameter %qD has Java class type", decl
);
11110 type
= error_mark_node
;
11111 TREE_TYPE (decl
) = error_mark_node
;
11115 if (type
!= error_mark_node
11116 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11119 type
= error_mark_node
;
11120 TREE_TYPE (decl
) = error_mark_node
;
11123 if (type
!= error_mark_node
)
11125 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11127 tree deptype
= type_is_deprecated (type
);
11129 warn_deprecated_use (deptype
, NULL_TREE
);
11132 /* Top-level qualifiers on the parameters are
11133 ignored for function types. */
11134 type
= cp_build_qualified_type (type
, 0);
11135 if (TREE_CODE (type
) == METHOD_TYPE
)
11137 error ("parameter %qD invalidly declared method type", decl
);
11138 type
= build_pointer_type (type
);
11139 TREE_TYPE (decl
) = type
;
11141 else if (abstract_virtuals_error (decl
, type
))
11142 any_error
= 1; /* Seems like a good idea. */
11143 else if (POINTER_TYPE_P (type
))
11145 /* [dcl.fct]/6, parameter types cannot contain pointers
11146 (references) to arrays of unknown bound. */
11147 tree t
= TREE_TYPE (type
);
11148 int ptr
= TYPE_PTR_P (type
);
11152 if (TYPE_PTR_P (t
))
11154 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11156 else if (!TYPE_DOMAIN (t
))
11160 if (TREE_CODE (t
) == ARRAY_TYPE
)
11162 ? G_("parameter %qD includes pointer to array of "
11163 "unknown bound %qT")
11164 : G_("parameter %qD includes reference to array of "
11165 "unknown bound %qT"),
11171 else if (init
&& !processing_template_decl
)
11172 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11175 DECL_CHAIN (decl
) = decls
;
11177 result
= tree_cons (init
, type
, result
);
11179 decls
= nreverse (decls
);
11180 result
= nreverse (result
);
11182 result
= chainon (result
, void_list_node
);
11189 /* D is a constructor or overloaded `operator='.
11191 Let T be the class in which D is declared. Then, this function
11194 -1 if D's is an ill-formed constructor or copy assignment operator
11195 whose first parameter is of type `T'.
11196 0 if D is not a copy constructor or copy assignment
11198 1 if D is a copy constructor or copy assignment operator whose
11199 first parameter is a reference to non-const qualified T.
11200 2 if D is a copy constructor or copy assignment operator whose
11201 first parameter is a reference to const qualified T.
11203 This function can be used as a predicate. Positive values indicate
11204 a copy constructor and nonzero values indicate a copy assignment
11208 copy_fn_p (const_tree d
)
11214 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11216 if (TREE_CODE (d
) == TEMPLATE_DECL
11217 || (DECL_TEMPLATE_INFO (d
)
11218 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11219 /* Instantiations of template member functions are never copy
11220 functions. Note that member functions of templated classes are
11221 represented as template functions internally, and we must
11222 accept those as copy functions. */
11225 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11229 arg_type
= TREE_VALUE (args
);
11230 if (arg_type
== error_mark_node
)
11233 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11235 /* Pass by value copy assignment operator. */
11238 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11239 && !TYPE_REF_IS_RVALUE (arg_type
)
11240 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11242 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11248 args
= TREE_CHAIN (args
);
11250 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11251 /* There are more non-optional args. */
11257 /* D is a constructor or overloaded `operator='.
11259 Let T be the class in which D is declared. Then, this function
11260 returns true when D is a move constructor or move assignment
11261 operator, false otherwise. */
11264 move_fn_p (const_tree d
)
11266 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11268 if (cxx_dialect
== cxx98
)
11269 /* There are no move constructors if we are in C++98 mode. */
11272 if (TREE_CODE (d
) == TEMPLATE_DECL
11273 || (DECL_TEMPLATE_INFO (d
)
11274 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11275 /* Instantiations of template member functions are never move
11276 functions. Note that member functions of templated classes are
11277 represented as template functions internally, and we must
11278 accept those as move functions. */
11281 return move_signature_fn_p (d
);
11284 /* D is a constructor or overloaded `operator='.
11286 Then, this function returns true when D has the same signature as a move
11287 constructor or move assignment operator (because either it is such a
11288 ctor/op= or it is a template specialization with the same signature),
11289 false otherwise. */
11292 move_signature_fn_p (const_tree d
)
11296 bool result
= false;
11298 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11302 arg_type
= TREE_VALUE (args
);
11303 if (arg_type
== error_mark_node
)
11306 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11307 && TYPE_REF_IS_RVALUE (arg_type
)
11308 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11312 args
= TREE_CHAIN (args
);
11314 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11315 /* There are more non-optional args. */
11321 /* Remember any special properties of member function DECL. */
11324 grok_special_member_properties (tree decl
)
11328 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11331 class_type
= DECL_CONTEXT (decl
);
11332 if (DECL_CONSTRUCTOR_P (decl
))
11334 int ctor
= copy_fn_p (decl
);
11336 if (!DECL_ARTIFICIAL (decl
))
11337 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11343 A non-template constructor for class X is a copy
11344 constructor if its first parameter is of type X&, const
11345 X&, volatile X& or const volatile X&, and either there
11346 are no other parameters or else all other parameters have
11347 default arguments. */
11348 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11349 if (user_provided_p (decl
))
11350 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11352 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11354 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11356 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11357 if (user_provided_p (decl
))
11358 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11360 else if (move_fn_p (decl
) && user_provided_p (decl
))
11361 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11362 else if (is_list_ctor (decl
))
11363 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11365 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11366 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11367 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11369 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11373 A non-template assignment operator for class X is a copy
11374 assignment operator if its parameter is of type X, X&, const
11375 X&, volatile X& or const volatile X&. */
11377 int assop
= copy_fn_p (decl
);
11381 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11382 if (user_provided_p (decl
))
11383 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11385 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11387 else if (move_fn_p (decl
) && user_provided_p (decl
))
11388 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11390 /* Destructors are handled in check_methods. */
11393 /* Check a constructor DECL has the correct form. Complains
11394 if the class has a constructor of the form X(X). */
11397 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11399 int ctor_parm
= copy_fn_p (decl
);
11405 A declaration of a constructor for a class X is ill-formed if
11406 its first parameter is of type (optionally cv-qualified) X
11407 and either there are no other parameters or else all other
11408 parameters have default arguments.
11410 We *don't* complain about member template instantiations that
11411 have this form, though; they can occur as we try to decide
11412 what constructor to use during overload resolution. Since
11413 overload resolution will never prefer such a constructor to
11414 the non-template copy constructor (which is either explicitly
11415 or implicitly defined), there's no need to worry about their
11416 existence. Theoretically, they should never even be
11417 instantiated, but that's hard to forestall. */
11418 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11426 /* An operator with this code is unary, but can also be binary. */
11429 ambi_op_p (enum tree_code code
)
11431 return (code
== INDIRECT_REF
11432 || code
== ADDR_EXPR
11433 || code
== UNARY_PLUS_EXPR
11434 || code
== NEGATE_EXPR
11435 || code
== PREINCREMENT_EXPR
11436 || code
== PREDECREMENT_EXPR
);
11439 /* An operator with this name can only be unary. */
11442 unary_op_p (enum tree_code code
)
11444 return (code
== TRUTH_NOT_EXPR
11445 || code
== BIT_NOT_EXPR
11446 || code
== COMPONENT_REF
11447 || code
== TYPE_EXPR
);
11450 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11451 errors are issued for invalid declarations. */
11454 grok_op_properties (tree decl
, bool complain
)
11456 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11458 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11459 tree name
= DECL_NAME (decl
);
11460 enum tree_code operator_code
;
11465 /* Count the number of arguments and check for ellipsis. */
11466 for (argtype
= argtypes
, arity
= 0;
11467 argtype
&& argtype
!= void_list_node
;
11468 argtype
= TREE_CHAIN (argtype
))
11470 ellipsis_p
= !argtype
;
11472 class_type
= DECL_CONTEXT (decl
);
11473 if (class_type
&& !CLASS_TYPE_P (class_type
))
11474 class_type
= NULL_TREE
;
11476 if (DECL_CONV_FN_P (decl
))
11477 operator_code
= TYPE_EXPR
;
11481 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11482 if (ansi_opname (CODE) == name) \
11484 operator_code = (CODE); \
11487 else if (ansi_assopname (CODE) == name) \
11489 operator_code = (CODE); \
11490 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11494 #include "operators.def"
11495 #undef DEF_OPERATOR
11497 gcc_unreachable ();
11500 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11501 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11504 switch (operator_code
)
11507 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11511 TYPE_GETS_DELETE (class_type
) |= 1;
11515 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11518 case VEC_DELETE_EXPR
:
11519 TYPE_GETS_DELETE (class_type
) |= 2;
11526 /* [basic.std.dynamic.allocation]/1:
11528 A program is ill-formed if an allocation function is declared
11529 in a namespace scope other than global scope or declared static
11532 The same also holds true for deallocation functions. */
11533 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11534 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11536 if (DECL_NAMESPACE_SCOPE_P (decl
))
11538 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11540 error ("%qD may not be declared within a namespace", decl
);
11543 else if (!TREE_PUBLIC (decl
))
11545 error ("%qD may not be declared as static", decl
);
11551 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11553 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11554 DECL_IS_OPERATOR_NEW (decl
) = 1;
11556 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11557 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11560 /* An operator function must either be a non-static member function
11561 or have at least one parameter of a class, a reference to a class,
11562 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11563 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11565 if (operator_code
== TYPE_EXPR
11566 || operator_code
== CALL_EXPR
11567 || operator_code
== COMPONENT_REF
11568 || operator_code
== ARRAY_REF
11569 || operator_code
== NOP_EXPR
)
11571 error ("%qD must be a nonstatic member function", decl
);
11578 if (DECL_STATIC_FUNCTION_P (decl
))
11580 error ("%qD must be either a non-static member "
11581 "function or a non-member function", decl
);
11585 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11587 tree arg
= non_reference (TREE_VALUE (p
));
11588 if (arg
== error_mark_node
)
11591 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11592 because these checks are performed even on
11593 template functions. */
11594 if (MAYBE_CLASS_TYPE_P (arg
)
11595 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11599 if (!p
|| p
== void_list_node
)
11602 error ("%qD must have an argument of class or "
11603 "enumerated type", decl
);
11609 /* There are no restrictions on the arguments to an overloaded
11611 if (operator_code
== CALL_EXPR
)
11614 /* Warn about conversion operators that will never be used. */
11615 if (IDENTIFIER_TYPENAME_P (name
)
11616 && ! DECL_TEMPLATE_INFO (decl
)
11618 /* Warn only declaring the function; there is no need to
11619 warn again about out-of-class definitions. */
11620 && class_type
== current_class_type
)
11622 tree t
= TREE_TYPE (name
);
11623 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11626 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11628 if (VOID_TYPE_P (t
))
11629 warning (OPT_Wconversion
,
11631 ? G_("conversion to a reference to void "
11632 "will never use a type conversion operator")
11633 : G_("conversion to void "
11634 "will never use a type conversion operator"));
11635 else if (class_type
)
11637 if (t
== class_type
)
11638 warning (OPT_Wconversion
,
11640 ? G_("conversion to a reference to the same type "
11641 "will never use a type conversion operator")
11642 : G_("conversion to the same type "
11643 "will never use a type conversion operator"));
11644 /* Don't force t to be complete here. */
11645 else if (MAYBE_CLASS_TYPE_P (t
)
11646 && COMPLETE_TYPE_P (t
)
11647 && DERIVED_FROM_P (t
, class_type
))
11648 warning (OPT_Wconversion
,
11650 ? G_("conversion to a reference to a base class "
11651 "will never use a type conversion operator")
11652 : G_("conversion to a base class "
11653 "will never use a type conversion operator"));
11658 if (operator_code
== COND_EXPR
)
11661 error ("ISO C++ prohibits overloading operator ?:");
11664 else if (ellipsis_p
)
11666 error ("%qD must not have variable number of arguments", decl
);
11669 else if (ambi_op_p (operator_code
))
11672 /* We pick the one-argument operator codes by default, so
11673 we don't have to change anything. */
11675 else if (arity
== 2)
11677 /* If we thought this was a unary operator, we now know
11678 it to be a binary operator. */
11679 switch (operator_code
)
11682 operator_code
= MULT_EXPR
;
11686 operator_code
= BIT_AND_EXPR
;
11689 case UNARY_PLUS_EXPR
:
11690 operator_code
= PLUS_EXPR
;
11694 operator_code
= MINUS_EXPR
;
11697 case PREINCREMENT_EXPR
:
11698 operator_code
= POSTINCREMENT_EXPR
;
11701 case PREDECREMENT_EXPR
:
11702 operator_code
= POSTDECREMENT_EXPR
;
11706 gcc_unreachable ();
11709 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11711 if ((operator_code
== POSTINCREMENT_EXPR
11712 || operator_code
== POSTDECREMENT_EXPR
)
11713 && ! processing_template_decl
11714 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11717 error ("postfix %qD must take %<int%> as its argument",
11720 error ("postfix %qD must take %<int%> as its second "
11728 error ("%qD must take either zero or one argument", decl
);
11730 error ("%qD must take either one or two arguments", decl
);
11734 /* More Effective C++ rule 6. */
11736 && (operator_code
== POSTINCREMENT_EXPR
11737 || operator_code
== POSTDECREMENT_EXPR
11738 || operator_code
== PREINCREMENT_EXPR
11739 || operator_code
== PREDECREMENT_EXPR
))
11741 tree arg
= TREE_VALUE (argtypes
);
11742 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11743 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11744 arg
= TREE_TYPE (arg
);
11745 arg
= TYPE_MAIN_VARIANT (arg
);
11746 if (operator_code
== PREINCREMENT_EXPR
11747 || operator_code
== PREDECREMENT_EXPR
)
11749 if (TREE_CODE (ret
) != REFERENCE_TYPE
11750 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11752 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11753 build_reference_type (arg
));
11757 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11758 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11762 else if (unary_op_p (operator_code
))
11767 error ("%qD must take %<void%>", decl
);
11769 error ("%qD must take exactly one argument", decl
);
11773 else /* if (binary_op_p (operator_code)) */
11778 error ("%qD must take exactly one argument", decl
);
11780 error ("%qD must take exactly two arguments", decl
);
11784 /* More Effective C++ rule 7. */
11786 && (operator_code
== TRUTH_ANDIF_EXPR
11787 || operator_code
== TRUTH_ORIF_EXPR
11788 || operator_code
== COMPOUND_EXPR
))
11789 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11793 /* Effective C++ rule 23. */
11796 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11797 && (operator_code
== PLUS_EXPR
11798 || operator_code
== MINUS_EXPR
11799 || operator_code
== TRUNC_DIV_EXPR
11800 || operator_code
== MULT_EXPR
11801 || operator_code
== TRUNC_MOD_EXPR
)
11802 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11803 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11805 /* [over.oper]/8 */
11806 for (; argtypes
&& argtypes
!= void_list_node
;
11807 argtypes
= TREE_CHAIN (argtypes
))
11808 if (TREE_PURPOSE (argtypes
))
11810 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11811 if (operator_code
== POSTINCREMENT_EXPR
11812 || operator_code
== POSTDECREMENT_EXPR
)
11814 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11819 error ("%qD cannot have default arguments", decl
);
11827 /* Return a string giving the keyword associate with CODE. */
11829 static const char *
11830 tag_name (enum tag_types code
)
11842 case typename_type
:
11845 gcc_unreachable ();
11849 /* Name lookup in an elaborated-type-specifier (after the keyword
11850 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11851 elaborated-type-specifier is invalid, issue a diagnostic and return
11852 error_mark_node; otherwise, return the *_TYPE to which it referred.
11853 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11856 check_elaborated_type_specifier (enum tag_types tag_code
,
11858 bool allow_template_p
)
11864 struct S { struct S *p; };
11866 name lookup will find the TYPE_DECL for the implicit "S::S"
11867 typedef. Adjust for that here. */
11868 if (DECL_SELF_REFERENCE_P (decl
))
11869 decl
= TYPE_NAME (TREE_TYPE (decl
));
11871 type
= TREE_TYPE (decl
);
11873 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11874 is false for this case as well. */
11875 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11877 error ("using template type parameter %qT after %qs",
11878 type
, tag_name (tag_code
));
11879 return error_mark_node
;
11881 /* Accept template template parameters. */
11882 else if (allow_template_p
11883 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11884 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11888 If the identifier resolves to a typedef-name or the
11889 simple-template-id resolves to an alias template
11890 specialization, the elaborated-type-specifier is ill-formed.
11892 In other words, the only legitimate declaration to use in the
11893 elaborated type specifier is the implicit typedef created when
11894 the type is declared. */
11895 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11896 && !DECL_SELF_REFERENCE_P (decl
)
11897 && tag_code
!= typename_type
)
11899 if (alias_template_specialization_p (type
))
11900 error ("using alias template specialization %qT after %qs",
11901 type
, tag_name (tag_code
));
11903 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11904 inform (DECL_SOURCE_LOCATION (decl
),
11905 "%qD has a previous declaration here", decl
);
11906 return error_mark_node
;
11908 else if (TREE_CODE (type
) != RECORD_TYPE
11909 && TREE_CODE (type
) != UNION_TYPE
11910 && tag_code
!= enum_type
11911 && tag_code
!= typename_type
)
11913 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11914 inform (input_location
, "%q+T has a previous declaration here", type
);
11915 return error_mark_node
;
11917 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11918 && tag_code
== enum_type
)
11920 error ("%qT referred to as enum", type
);
11921 inform (input_location
, "%q+T has a previous declaration here", type
);
11922 return error_mark_node
;
11924 else if (!allow_template_p
11925 && TREE_CODE (type
) == RECORD_TYPE
11926 && CLASSTYPE_IS_TEMPLATE (type
))
11928 /* If a class template appears as elaborated type specifier
11929 without a template header such as:
11931 template <class T> class C {};
11932 void f(class C); // No template header here
11934 then the required template argument is missing. */
11935 error ("template argument required for %<%s %T%>",
11936 tag_name (tag_code
),
11937 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11938 return error_mark_node
;
11944 /* Lookup NAME in elaborate type specifier in scope according to
11945 SCOPE and issue diagnostics if necessary.
11946 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11947 found, and ERROR_MARK_NODE for type error. */
11950 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11951 tag_scope scope
, bool template_header_p
)
11955 if (scope
== ts_global
)
11957 /* First try ordinary name lookup, ignoring hidden class name
11958 injected via friend declaration. */
11959 decl
= lookup_name_prefer_type (name
, 2);
11960 /* If that fails, the name will be placed in the smallest
11961 non-class, non-function-prototype scope according to 3.3.1/5.
11962 We may already have a hidden name declared as friend in this
11963 scope. So lookup again but not ignoring hidden names.
11964 If we find one, that name will be made visible rather than
11965 creating a new tag. */
11967 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11970 decl
= lookup_type_scope (name
, scope
);
11973 && (DECL_CLASS_TEMPLATE_P (decl
)
11974 || DECL_TEMPLATE_TEMPLATE_PARM_P (decl
)))
11975 decl
= DECL_TEMPLATE_RESULT (decl
);
11977 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11979 /* Look for invalid nested type:
11983 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11985 error ("%qD has the same name as the class in which it is "
11988 return error_mark_node
;
11991 /* Two cases we need to consider when deciding if a class
11992 template is allowed as an elaborated type specifier:
11993 1. It is a self reference to its own class.
11994 2. It comes with a template header.
11998 template <class T> class C {
11999 class C *c1; // DECL_SELF_REFERENCE_P is true
12002 template <class U> class C; // template_header_p is true
12003 template <class T> class C<T>::D {
12004 class C *c2; // DECL_SELF_REFERENCE_P is true
12007 t
= check_elaborated_type_specifier (tag_code
,
12010 | DECL_SELF_REFERENCE_P (decl
));
12013 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12015 error ("reference to %qD is ambiguous", name
);
12016 print_candidates (decl
);
12017 return error_mark_node
;
12023 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12024 Define the tag as a forward-reference if it is not defined.
12026 If a declaration is given, process it here, and report an error if
12027 multiple declarations are not identical.
12029 SCOPE is TS_CURRENT when this is also a definition. Only look in
12030 the current frame for the name (since C++ allows new names in any
12031 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12032 declaration. Only look beginning from the current scope outward up
12033 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12035 TEMPLATE_HEADER_P is true when this declaration is preceded by
12036 a set of template parameters. */
12039 xref_tag_1 (enum tag_types tag_code
, tree name
,
12040 tag_scope orig_scope
, bool template_header_p
)
12042 enum tree_code code
;
12044 tree context
= NULL_TREE
;
12047 gcc_assert (identifier_p (name
));
12053 code
= RECORD_TYPE
;
12059 code
= ENUMERAL_TYPE
;
12062 gcc_unreachable ();
12065 if (orig_scope
== ts_lambda
)
12066 scope
= ts_current
;
12068 scope
= orig_scope
;
12070 /* In case of anonymous name, xref_tag is only called to
12071 make type node and push name. Name lookup is not required. */
12072 if (ANON_AGGRNAME_P (name
))
12075 t
= lookup_and_check_tag (tag_code
, name
,
12076 scope
, template_header_p
);
12078 if (t
== error_mark_node
)
12079 return error_mark_node
;
12081 if (scope
!= ts_current
&& t
&& current_class_type
12082 && template_class_depth (current_class_type
)
12083 && template_header_p
)
12085 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12088 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12089 definition of this tag. Since, in addition, we are currently
12090 processing a (member) template declaration of a template
12091 class, we must be very careful; consider:
12098 { template <class V>
12099 friend struct S1; };
12101 Here, the S2::S1 declaration should not be confused with the
12102 outer declaration. In particular, the inner version should
12103 have a template parameter of level 2, not level 1. This
12104 would be particularly important if the member declaration
12107 template <class V = U> friend struct S1;
12109 say, when we should tsubst into `U' when instantiating
12110 S2. On the other hand, when presented with:
12120 we must find the inner binding eventually. We
12121 accomplish this by making sure that the new type we
12122 create to represent this declaration has the right
12124 context
= TYPE_CONTEXT (t
);
12130 /* If no such tag is yet defined, create a forward-reference node
12131 and record it as the "definition".
12132 When a real declaration of this type is found,
12133 the forward-reference will be altered into a real type. */
12134 if (code
== ENUMERAL_TYPE
)
12136 error ("use of enum %q#D without previous declaration", name
);
12137 return error_mark_node
;
12141 t
= make_class_type (code
);
12142 TYPE_CONTEXT (t
) = context
;
12143 if (orig_scope
== ts_lambda
)
12144 /* Remember that we're declaring a lambda to avoid bogus errors
12145 in push_template_decl. */
12146 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12147 t
= pushtag (name
, t
, scope
);
12152 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12154 if (!redeclare_class_template (t
, current_template_parms
))
12155 return error_mark_node
;
12157 else if (!processing_template_decl
12158 && CLASS_TYPE_P (t
)
12159 && CLASSTYPE_IS_TEMPLATE (t
))
12161 error ("redeclaration of %qT as a non-template", t
);
12162 error ("previous declaration %q+D", t
);
12163 return error_mark_node
;
12166 /* Make injected friend class visible. */
12167 if (scope
!= ts_within_enclosing_non_class
12168 && hidden_name_p (TYPE_NAME (t
)))
12170 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12171 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12173 if (TYPE_TEMPLATE_INFO (t
))
12175 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12176 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12184 /* Wrapper for xref_tag_1. */
12187 xref_tag (enum tag_types tag_code
, tree name
,
12188 tag_scope scope
, bool template_header_p
)
12192 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12193 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12194 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12200 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12202 enum tag_types tag_kind
;
12204 if (TREE_CODE (old
) == RECORD_TYPE
)
12205 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12207 tag_kind
= union_type
;
12209 if (id
== NULL_TREE
)
12210 id
= TYPE_IDENTIFIER (old
);
12212 return xref_tag (tag_kind
, id
, scope
, false);
12215 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12216 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12217 access_* node, and the TREE_VALUE is the type of the base-class.
12218 Non-NULL TREE_TYPE indicates virtual inheritance.
12220 Returns true if the binfo hierarchy was successfully created,
12221 false if an error was detected. */
12224 xref_basetypes (tree ref
, tree base_list
)
12227 tree binfo
, base_binfo
;
12228 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12229 unsigned max_bases
= 0; /* Maximum direct bases. */
12231 tree default_access
;
12232 tree igo_prev
; /* Track Inheritance Graph Order. */
12234 if (ref
== error_mark_node
)
12237 /* The base of a derived class is private by default, all others are
12239 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12240 && CLASSTYPE_DECLARED_CLASS (ref
)
12241 ? access_private_node
: access_public_node
);
12243 /* First, make sure that any templates in base-classes are
12244 instantiated. This ensures that if we call ourselves recursively
12245 we do not get confused about which classes are marked and which
12247 basep
= &base_list
;
12250 tree basetype
= TREE_VALUE (*basep
);
12252 /* The dependent_type_p call below should really be dependent_scope_p
12253 so that we give a hard error about using an incomplete type as a
12254 base, but we allow it with a pedwarn for backward
12256 if (processing_template_decl
12257 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12258 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12259 if (!dependent_type_p (basetype
)
12260 && !complete_type_or_else (basetype
, NULL
))
12261 /* An incomplete type. Remove it from the list. */
12262 *basep
= TREE_CHAIN (*basep
);
12266 if (TREE_TYPE (*basep
))
12268 if (CLASS_TYPE_P (basetype
))
12269 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12270 basep
= &TREE_CHAIN (*basep
);
12274 TYPE_MARKED_P (ref
) = 1;
12276 /* The binfo slot should be empty, unless this is an (ill-formed)
12278 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12280 error ("redefinition of %q#T", ref
);
12284 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12286 binfo
= make_tree_binfo (max_bases
);
12288 TYPE_BINFO (ref
) = binfo
;
12289 BINFO_OFFSET (binfo
) = size_zero_node
;
12290 BINFO_TYPE (binfo
) = ref
;
12292 /* Apply base-class info set up to the variants of this type. */
12293 fixup_type_variants (ref
);
12297 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12298 /* An aggregate cannot have baseclasses. */
12299 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12301 if (TREE_CODE (ref
) == UNION_TYPE
)
12303 error ("derived union %qT invalid", ref
);
12310 if (TYPE_FOR_JAVA (ref
))
12312 error ("Java class %qT cannot have multiple bases", ref
);
12319 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12321 if (TYPE_FOR_JAVA (ref
))
12323 error ("Java class %qT cannot have virtual bases", ref
);
12328 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12330 tree access
= TREE_PURPOSE (base_list
);
12331 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12332 tree basetype
= TREE_VALUE (base_list
);
12334 if (access
== access_default_node
)
12335 access
= default_access
;
12337 if (PACK_EXPANSION_P (basetype
))
12338 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12339 if (TREE_CODE (basetype
) == TYPE_DECL
)
12340 basetype
= TREE_TYPE (basetype
);
12341 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12343 error ("base type %qT fails to be a struct or class type",
12348 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12349 TYPE_FOR_JAVA (ref
) = 1;
12351 base_binfo
= NULL_TREE
;
12352 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12354 base_binfo
= TYPE_BINFO (basetype
);
12355 /* The original basetype could have been a typedef'd type. */
12356 basetype
= BINFO_TYPE (base_binfo
);
12358 /* Inherit flags from the base. */
12359 TYPE_HAS_NEW_OPERATOR (ref
)
12360 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12361 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12362 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12363 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12364 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12365 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12366 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12367 CLASSTYPE_REPEATED_BASE_P (ref
)
12368 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12371 /* We must do this test after we've seen through a typedef
12373 if (TYPE_MARKED_P (basetype
))
12375 if (basetype
== ref
)
12376 error ("recursive type %qT undefined", basetype
);
12378 error ("duplicate base type %qT invalid", basetype
);
12382 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12383 /* Regenerate the pack expansion for the bases. */
12384 basetype
= make_pack_expansion (basetype
);
12386 TYPE_MARKED_P (basetype
) = 1;
12388 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12389 &igo_prev
, via_virtual
);
12390 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12391 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12393 BINFO_BASE_APPEND (binfo
, base_binfo
);
12394 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12397 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12398 /* If we didn't get max_vbases vbases, we must have shared at
12399 least one of them, and are therefore diamond shaped. */
12400 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12402 /* Unmark all the types. */
12403 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12404 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12405 TYPE_MARKED_P (ref
) = 0;
12407 /* Now see if we have a repeated base type. */
12408 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12410 for (base_binfo
= binfo
; base_binfo
;
12411 base_binfo
= TREE_CHAIN (base_binfo
))
12413 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12415 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12418 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12420 for (base_binfo
= binfo
; base_binfo
;
12421 base_binfo
= TREE_CHAIN (base_binfo
))
12422 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12423 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12432 /* Copies the enum-related properties from type SRC to type DST.
12433 Used with the underlying type of an enum and the enum itself. */
12435 copy_type_enum (tree dst
, tree src
)
12438 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12440 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12441 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12442 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12443 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12444 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12445 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12446 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12447 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12448 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12452 /* Begin compiling the definition of an enumeration type.
12455 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12457 UNDERLYING_TYPE is the type that will be used as the storage for
12458 the enumeration type. This should be NULL_TREE if no storage type
12461 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12463 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12465 Returns the type object, as yet incomplete.
12466 Also records info about it so that build_enumerator
12467 may be used to declare the individual values as they are read. */
12470 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12471 bool scoped_enum_p
, bool *is_new
)
12473 tree prevtype
= NULL_TREE
;
12474 gcc_assert (identifier_p (name
));
12478 /* [C++0x dcl.enum]p5:
12480 If not explicitly specified, the underlying type of a scoped
12481 enumeration type is int. */
12482 if (!underlying_type
&& scoped_enum_p
)
12483 underlying_type
= integer_type_node
;
12485 if (underlying_type
)
12486 underlying_type
= cv_unqualified (underlying_type
);
12488 /* If this is the real definition for a previous forward reference,
12489 fill in the contents in the same object that used to be the
12490 forward reference. */
12492 enumtype
= lookup_and_check_tag (enum_type
, name
,
12493 /*tag_scope=*/ts_current
,
12494 /*template_header_p=*/false);
12496 /* In case of a template_decl, the only check that should be deferred
12497 to instantiation time is the comparison of underlying types. */
12498 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12500 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12502 error_at (input_location
, "scoped/unscoped mismatch "
12503 "in enum %q#T", enumtype
);
12504 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12505 "previous definition here");
12506 enumtype
= error_mark_node
;
12508 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12510 error_at (input_location
, "underlying type mismatch "
12511 "in enum %q#T", enumtype
);
12512 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12513 "previous definition here");
12514 enumtype
= error_mark_node
;
12516 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12517 && !dependent_type_p (underlying_type
)
12518 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12519 && !same_type_p (underlying_type
,
12520 ENUM_UNDERLYING_TYPE (enumtype
)))
12522 error_at (input_location
, "different underlying type "
12523 "in enum %q#T", enumtype
);
12524 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12525 "previous definition here");
12526 underlying_type
= NULL_TREE
;
12530 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12531 || processing_template_decl
)
12533 /* In case of error, make a dummy enum to allow parsing to
12535 if (enumtype
== error_mark_node
)
12537 name
= make_anon_name ();
12538 enumtype
= NULL_TREE
;
12541 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12542 of an opaque enum, or an opaque enum of an already defined
12543 enumeration (C++0x only).
12544 In any other case, it'll be NULL_TREE. */
12550 prevtype
= enumtype
;
12552 /* Do not push the decl more than once, unless we need to
12553 compare underlying types at instantiation time */
12555 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12556 || (underlying_type
12557 && dependent_type_p (underlying_type
))
12558 || (ENUM_UNDERLYING_TYPE (enumtype
)
12559 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12561 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12562 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12565 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12568 if (enumtype
== error_mark_node
)
12569 return error_mark_node
;
12571 /* The enum is considered opaque until the opening '{' of the
12572 enumerator list. */
12573 SET_OPAQUE_ENUM_P (enumtype
, true);
12574 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12577 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12579 if (underlying_type
)
12581 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12583 copy_type_enum (enumtype
, underlying_type
);
12584 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12586 else if (dependent_type_p (underlying_type
))
12587 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12589 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12590 underlying_type
, enumtype
);
12593 /* If into a template class, the returned enum is always the first
12594 declaration (opaque or not) seen. This way all the references to
12595 this type will be to the same declaration. The following ones are used
12596 only to check for definition errors. */
12597 if (prevtype
&& processing_template_decl
)
12603 /* After processing and defining all the values of an enumeration type,
12604 install their decls in the enumeration type.
12605 ENUMTYPE is the type object. */
12608 finish_enum_value_list (tree enumtype
)
12611 tree underlying_type
;
12614 tree minnode
, maxnode
;
12617 bool fixed_underlying_type_p
12618 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12620 /* We built up the VALUES in reverse order. */
12621 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12623 /* For an enum defined in a template, just set the type of the values;
12624 all further processing is postponed until the template is
12625 instantiated. We need to set the type so that tsubst of a CONST_DECL
12627 if (processing_template_decl
)
12629 for (values
= TYPE_VALUES (enumtype
);
12631 values
= TREE_CHAIN (values
))
12632 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12636 /* Determine the minimum and maximum values of the enumerators. */
12637 if (TYPE_VALUES (enumtype
))
12639 minnode
= maxnode
= NULL_TREE
;
12641 for (values
= TYPE_VALUES (enumtype
);
12643 values
= TREE_CHAIN (values
))
12645 decl
= TREE_VALUE (values
);
12647 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12648 each enumerator has the type of its enumeration. Prior to the
12649 closing brace, the type of each enumerator is the type of its
12650 initializing value. */
12651 TREE_TYPE (decl
) = enumtype
;
12653 /* Update the minimum and maximum values, if appropriate. */
12654 value
= DECL_INITIAL (decl
);
12655 if (value
== error_mark_node
)
12656 value
= integer_zero_node
;
12657 /* Figure out what the minimum and maximum values of the
12658 enumerators are. */
12660 minnode
= maxnode
= value
;
12661 else if (tree_int_cst_lt (maxnode
, value
))
12663 else if (tree_int_cst_lt (value
, minnode
))
12670 If the enumerator-list is empty, the underlying type is as if
12671 the enumeration had a single enumerator with value 0. */
12672 minnode
= maxnode
= integer_zero_node
;
12674 if (!fixed_underlying_type_p
)
12676 /* Compute the number of bits require to represent all values of the
12677 enumeration. We must do this before the type of MINNODE and
12678 MAXNODE are transformed, since tree_int_cst_min_precision relies
12679 on the TREE_TYPE of the value it is passed. */
12680 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12681 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12682 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12683 int precision
= MAX (lowprec
, highprec
);
12685 bool use_short_enum
;
12687 /* Determine the underlying type of the enumeration.
12691 The underlying type of an enumeration is an integral type that
12692 can represent all the enumerator values defined in the
12693 enumeration. It is implementation-defined which integral type is
12694 used as the underlying type for an enumeration except that the
12695 underlying type shall not be larger than int unless the value of
12696 an enumerator cannot fit in an int or unsigned int.
12698 We use "int" or an "unsigned int" as the underlying type, even if
12699 a smaller integral type would work, unless the user has
12700 explicitly requested that we use the smallest possible type. The
12701 user can request that for all enumerations with a command line
12702 flag, or for just one enumeration with an attribute. */
12704 use_short_enum
= flag_short_enums
12705 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12707 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12711 underlying_type
= integer_types
[itk
];
12712 if (underlying_type
!= NULL_TREE
12713 && TYPE_PRECISION (underlying_type
) >= precision
12714 && TYPE_SIGN (underlying_type
) == sgn
)
12717 if (itk
== itk_none
)
12721 IF no integral type can represent all the enumerator values, the
12722 enumeration is ill-formed. */
12723 error ("no integral type can represent all of the enumerator values "
12724 "for %qT", enumtype
);
12725 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12726 underlying_type
= integer_types
[itk_unsigned_long_long
];
12731 The value of sizeof() applied to an enumeration type, an object
12732 of an enumeration type, or an enumerator, is the value of sizeof()
12733 applied to the underlying type. */
12734 copy_type_enum (enumtype
, underlying_type
);
12736 /* Compute the minimum and maximum values for the type.
12740 For an enumeration where emin is the smallest enumerator and emax
12741 is the largest, the values of the enumeration are the values of the
12742 underlying type in the range bmin to bmax, where bmin and bmax are,
12743 respectively, the smallest and largest values of the smallest bit-
12744 field that can store emin and emax. */
12746 /* The middle-end currently assumes that types with TYPE_PRECISION
12747 narrower than their underlying type are suitably zero or sign
12748 extended to fill their mode. Similarly, it assumes that the front
12749 end assures that a value of a particular type must be within
12750 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12752 We used to set these fields based on bmin and bmax, but that led
12753 to invalid assumptions like optimizing away bounds checking. So
12754 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12755 TYPE_MAX_VALUE to the values for the mode above and only restrict
12756 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12757 ENUM_UNDERLYING_TYPE (enumtype
)
12758 = build_distinct_type_copy (underlying_type
);
12759 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12760 set_min_and_max_values_for_integral_type
12761 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12763 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12764 if (flag_strict_enums
)
12765 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12768 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12770 /* Convert each of the enumerators to the type of the underlying
12771 type of the enumeration. */
12772 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12774 location_t saved_location
;
12776 decl
= TREE_VALUE (values
);
12777 saved_location
= input_location
;
12778 input_location
= DECL_SOURCE_LOCATION (decl
);
12779 if (fixed_underlying_type_p
)
12780 /* If the enumeration type has a fixed underlying type, we
12781 already checked all of the enumerator values. */
12782 value
= DECL_INITIAL (decl
);
12784 value
= perform_implicit_conversion (underlying_type
,
12785 DECL_INITIAL (decl
),
12786 tf_warning_or_error
);
12787 input_location
= saved_location
;
12789 /* Do not clobber shared ints. */
12790 value
= copy_node (value
);
12792 TREE_TYPE (value
) = enumtype
;
12793 DECL_INITIAL (decl
) = value
;
12796 /* Fix up all variant types of this enum type. */
12797 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12798 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12800 if (at_class_scope_p ()
12801 && COMPLETE_TYPE_P (current_class_type
)
12802 && UNSCOPED_ENUM_P (enumtype
))
12803 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12804 current_class_type
);
12806 /* Finish debugging output for this type. */
12807 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12810 /* Finishes the enum type. This is called only the first time an
12811 enumeration is seen, be it opaque or odinary.
12812 ENUMTYPE is the type object. */
12815 finish_enum (tree enumtype
)
12817 if (processing_template_decl
)
12819 if (at_function_scope_p ())
12820 add_stmt (build_min (TAG_DEFN
, enumtype
));
12824 /* If this is a forward declaration, there should not be any variants,
12825 though we can get a variant in the middle of an enum-specifier with
12826 wacky code like 'enum E { e = sizeof(const E*) };' */
12827 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12828 && (TYPE_VALUES (enumtype
)
12829 || !TYPE_NEXT_VARIANT (enumtype
)));
12832 /* Build and install a CONST_DECL for an enumeration constant of the
12833 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12834 LOC is the location of NAME.
12835 Assignment of sequential values by default is handled here. */
12838 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12844 /* If the VALUE was erroneous, pretend it wasn't there; that will
12845 result in the enum being assigned the next value in sequence. */
12846 if (value
== error_mark_node
)
12849 /* Remove no-op casts from the value. */
12851 STRIP_TYPE_NOPS (value
);
12853 if (! processing_template_decl
)
12855 /* Validate and default VALUE. */
12856 if (value
!= NULL_TREE
)
12858 value
= cxx_constant_value (value
);
12860 if (TREE_CODE (value
) != INTEGER_CST
12861 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12863 error ("enumerator value for %qD is not an integer constant",
12869 /* Default based on previous value. */
12870 if (value
== NULL_TREE
)
12872 if (TYPE_VALUES (enumtype
))
12877 /* C++03 7.2/4: If no initializer is specified for the first
12878 enumerator, the type is an unspecified integral
12879 type. Otherwise the type is the same as the type of the
12880 initializing value of the preceding enumerator unless the
12881 incremented value is not representable in that type, in
12882 which case the type is an unspecified integral type
12883 sufficient to contain the incremented value. */
12884 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12885 if (error_operand_p (prev_value
))
12886 value
= error_mark_node
;
12889 tree type
= TREE_TYPE (prev_value
);
12890 signop sgn
= TYPE_SIGN (type
);
12891 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
12895 bool pos
= !wi::neg_p (wi
, sgn
);
12896 if (!wi::fits_to_tree_p (wi
, type
))
12899 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12901 type
= integer_types
[itk
];
12902 if (type
!= NULL_TREE
12903 && (pos
|| !TYPE_UNSIGNED (type
))
12904 && wi::fits_to_tree_p (wi
, type
))
12907 if (type
&& cxx_dialect
< cxx11
12908 && itk
> itk_unsigned_long
)
12909 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12910 incremented enumerator value is too large for %<unsigned long%>" : "\
12911 incremented enumerator value is too large for %<long%>");
12913 if (type
== NULL_TREE
)
12916 value
= wide_int_to_tree (type
, wi
);
12921 error ("overflow in enumeration values at %qD", name
);
12922 value
= error_mark_node
;
12927 value
= integer_zero_node
;
12930 /* Remove no-op casts from the value. */
12931 STRIP_TYPE_NOPS (value
);
12933 /* If the underlying type of the enum is fixed, check whether
12934 the enumerator values fits in the underlying type. If it
12935 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12936 if (ENUM_UNDERLYING_TYPE (enumtype
)
12938 && TREE_CODE (value
) == INTEGER_CST
)
12940 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12941 error ("enumerator value %E is outside the range of underlying "
12942 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12944 /* Convert the value to the appropriate type. */
12945 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12949 /* C++ associates enums with global, function, or class declarations. */
12950 context
= current_scope ();
12952 /* Build the actual enumeration constant. Note that the enumeration
12953 constants have the underlying type of the enum (if it is fixed)
12954 or the type of their initializer (if the underlying type of the
12955 enum is not fixed):
12959 If the underlying type is fixed, the type of each enumerator
12960 prior to the closing brace is the underlying type; if the
12961 initializing value of an enumerator cannot be represented by
12962 the underlying type, the program is ill-formed. If the
12963 underlying type is not fixed, the type of each enumerator is
12964 the type of its initializing value.
12966 If the underlying type is not fixed, it will be computed by
12967 finish_enum and we will reset the type of this enumerator. Of
12968 course, if we're processing a template, there may be no value. */
12969 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12971 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12973 DECL_CONTEXT (decl
) = enumtype
;
12974 TREE_CONSTANT (decl
) = 1;
12975 TREE_READONLY (decl
) = 1;
12976 DECL_INITIAL (decl
) = value
;
12978 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12979 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12980 on the TYPE_FIELDS list for `S'. (That's so that you can say
12981 things like `S::i' later.) */
12982 finish_member_declaration (decl
);
12986 /* Add this enumeration constant to the list for this type. */
12987 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12990 /* Look for an enumerator with the given NAME within the enumeration
12991 type ENUMTYPE. This routine is used primarily for qualified name
12992 lookup into an enumerator in C++0x, e.g.,
12994 enum class Color { Red, Green, Blue };
12996 Color color = Color::Red;
12998 Returns the value corresponding to the enumerator, or
12999 NULL_TREE if no such enumerator was found. */
13001 lookup_enumerator (tree enumtype
, tree name
)
13004 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13006 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13007 return e
? TREE_VALUE (e
) : NULL_TREE
;
13011 /* We're defining DECL. Make sure that its type is OK. */
13014 check_function_type (tree decl
, tree current_function_parms
)
13016 tree fntype
= TREE_TYPE (decl
);
13017 tree return_type
= complete_type (TREE_TYPE (fntype
));
13019 /* In a function definition, arg types must be complete. */
13020 require_complete_types_for_parms (current_function_parms
);
13022 if (dependent_type_p (return_type
)
13023 || type_uses_auto (return_type
))
13025 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13026 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13028 tree args
= TYPE_ARG_TYPES (fntype
);
13030 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13031 error ("return type %q#T is incomplete", return_type
);
13033 error ("return type has Java class type %q#T", return_type
);
13035 /* Make it return void instead. */
13036 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13037 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13039 TREE_CHAIN (args
));
13041 fntype
= build_function_type (void_type_node
, args
);
13043 = build_exception_variant (fntype
,
13044 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13045 fntype
= (cp_build_type_attribute_variant
13046 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13047 TREE_TYPE (decl
) = fntype
;
13050 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13053 /* Create the FUNCTION_DECL for a function definition.
13054 DECLSPECS and DECLARATOR are the parts of the declaration;
13055 they describe the function's name and the type it returns,
13056 but twisted together in a fashion that parallels the syntax of C.
13058 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13059 DECLARATOR is really the DECL for the function we are about to
13060 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13061 indicating that the function is an inline defined in-class.
13063 This function creates a binding context for the function body
13064 as well as setting up the FUNCTION_DECL in current_function_decl.
13066 For C++, we must first check whether that datum makes any sense.
13067 For example, "class A local_a(1,2);" means that variable local_a
13068 is an aggregate of type A, which should have a constructor
13069 applied to it with the argument list [1, 2].
13071 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13072 or may be a BLOCK if the function has been defined previously
13073 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13074 error_mark_node if the function has never been defined, or
13075 a BLOCK if the function has been defined somewhere. */
13078 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13080 tree ctype
= NULL_TREE
;
13083 int doing_friend
= 0;
13084 cp_binding_level
*bl
;
13085 tree current_function_parms
;
13086 struct c_fileinfo
*finfo
13087 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13088 bool honor_interface
;
13090 /* Sanity check. */
13091 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13092 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13094 fntype
= TREE_TYPE (decl1
);
13095 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13096 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13098 /* ISO C++ 11.4/5. A friend function defined in a class is in
13099 the (lexical) scope of the class in which it is defined. */
13100 if (!ctype
&& DECL_FRIEND_P (decl1
))
13102 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13104 /* CTYPE could be null here if we're dealing with a template;
13105 for example, `inline friend float foo()' inside a template
13106 will have no CTYPE set. */
13107 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13113 if (DECL_DECLARED_INLINE_P (decl1
)
13114 && lookup_attribute ("noinline", attrs
))
13115 warning (0, "inline function %q+D given attribute noinline", decl1
);
13117 /* Handle gnu_inline attribute. */
13118 if (GNU_INLINE_P (decl1
))
13120 DECL_EXTERNAL (decl1
) = 1;
13121 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13122 DECL_INTERFACE_KNOWN (decl1
) = 1;
13123 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13126 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13127 /* This is a constructor, we must ensure that any default args
13128 introduced by this definition are propagated to the clones
13129 now. The clones are used directly in overload resolution. */
13130 adjust_clone_args (decl1
);
13132 /* Sometimes we don't notice that a function is a static member, and
13133 build a METHOD_TYPE for it. Fix that up now. */
13134 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13135 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13137 /* Set up current_class_type, and enter the scope of the class, if
13140 push_nested_class (ctype
);
13141 else if (DECL_STATIC_FUNCTION_P (decl1
))
13142 push_nested_class (DECL_CONTEXT (decl1
));
13144 /* Now that we have entered the scope of the class, we must restore
13145 the bindings for any template parameters surrounding DECL1, if it
13146 is an inline member template. (Order is important; consider the
13147 case where a template parameter has the same name as a field of
13148 the class.) It is not until after this point that
13149 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13150 if (flags
& SF_INCLASS_INLINE
)
13151 maybe_begin_member_template_processing (decl1
);
13153 /* Effective C++ rule 15. */
13155 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13156 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13157 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13159 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13160 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13161 if (!DECL_INITIAL (decl1
))
13162 DECL_INITIAL (decl1
) = error_mark_node
;
13164 /* This function exists in static storage.
13165 (This does not mean `static' in the C sense!) */
13166 TREE_STATIC (decl1
) = 1;
13168 /* We must call push_template_decl after current_class_type is set
13169 up. (If we are processing inline definitions after exiting a
13170 class scope, current_class_type will be NULL_TREE until set above
13171 by push_nested_class.) */
13172 if (processing_template_decl
)
13174 tree newdecl1
= push_template_decl (decl1
);
13175 if (newdecl1
== error_mark_node
)
13177 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13178 pop_nested_class ();
13184 /* We are now in the scope of the function being defined. */
13185 current_function_decl
= decl1
;
13187 /* Save the parm names or decls from this function's declarator
13188 where store_parm_decls will find them. */
13189 current_function_parms
= DECL_ARGUMENTS (decl1
);
13191 /* Make sure the parameter and return types are reasonable. When
13192 you declare a function, these types can be incomplete, but they
13193 must be complete when you define the function. */
13194 check_function_type (decl1
, current_function_parms
);
13196 /* Build the return declaration for the function. */
13197 restype
= TREE_TYPE (fntype
);
13199 if (DECL_RESULT (decl1
) == NULL_TREE
)
13203 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13204 DECL_ARTIFICIAL (resdecl
) = 1;
13205 DECL_IGNORED_P (resdecl
) = 1;
13206 DECL_RESULT (decl1
) = resdecl
;
13208 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13211 /* Let the user know we're compiling this function. */
13212 announce_function (decl1
);
13214 /* Record the decl so that the function name is defined.
13215 If we already have a decl for this name, and it is a FUNCTION_DECL,
13216 use the old decl. */
13217 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13219 /* A specialization is not used to guide overload resolution. */
13220 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13221 && !(DECL_USE_TEMPLATE (decl1
) &&
13222 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13224 tree olddecl
= pushdecl (decl1
);
13226 if (olddecl
== error_mark_node
)
13227 /* If something went wrong when registering the declaration,
13228 use DECL1; we have to have a FUNCTION_DECL to use when
13229 parsing the body of the function. */
13233 /* Otherwise, OLDDECL is either a previous declaration
13234 of the same function or DECL1 itself. */
13236 if (warn_missing_declarations
13237 && olddecl
== decl1
13238 && !DECL_MAIN_P (decl1
)
13239 && TREE_PUBLIC (decl1
)
13240 && !DECL_DECLARED_INLINE_P (decl1
))
13244 /* Check whether DECL1 is in an anonymous
13246 for (context
= DECL_CONTEXT (decl1
);
13248 context
= DECL_CONTEXT (context
))
13250 if (TREE_CODE (context
) == NAMESPACE_DECL
13251 && DECL_NAME (context
) == NULL_TREE
)
13255 if (context
== NULL
)
13256 warning (OPT_Wmissing_declarations
,
13257 "no previous declaration for %q+D", decl1
);
13265 /* We need to set the DECL_CONTEXT. */
13266 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13267 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13269 fntype
= TREE_TYPE (decl1
);
13270 restype
= TREE_TYPE (fntype
);
13272 /* If #pragma weak applies, mark the decl appropriately now.
13273 The pragma only applies to global functions. Because
13274 determining whether or not the #pragma applies involves
13275 computing the mangled name for the declaration, we cannot
13276 apply the pragma until after we have merged this declaration
13277 with any previous declarations; if the original declaration
13278 has a linkage specification, that specification applies to
13279 the definition as well, and may affect the mangled name. */
13280 if (DECL_FILE_SCOPE_P (decl1
))
13281 maybe_apply_pragma_weak (decl1
);
13284 /* Reset this in case the call to pushdecl changed it. */
13285 current_function_decl
= decl1
;
13287 gcc_assert (DECL_INITIAL (decl1
));
13289 /* This function may already have been parsed, in which case just
13290 return; our caller will skip over the body without parsing. */
13291 if (DECL_INITIAL (decl1
) != error_mark_node
)
13294 /* Initialize RTL machinery. We cannot do this until
13295 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13296 even when processing a template; this is how we get
13297 CFUN set up, and our per-function variables initialized.
13298 FIXME factor out the non-RTL stuff. */
13299 bl
= current_binding_level
;
13300 allocate_struct_function (decl1
, processing_template_decl
);
13302 /* Initialize the language data structures. Whenever we start
13303 a new function, we destroy temporaries in the usual way. */
13304 cfun
->language
= ggc_alloc_cleared_language_function ();
13305 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13306 current_binding_level
= bl
;
13308 if (!processing_template_decl
&& type_uses_auto (restype
))
13310 FNDECL_USED_AUTO (decl1
) = true;
13311 current_function_auto_return_pattern
= restype
;
13314 /* Start the statement-tree, start the tree now. */
13315 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13317 /* If we are (erroneously) defining a function that we have already
13318 defined before, wipe out what we knew before. */
13319 if (!DECL_PENDING_INLINE_P (decl1
))
13320 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13322 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13324 /* We know that this was set up by `grokclassfn'. We do not
13325 wait until `store_parm_decls', since evil parse errors may
13326 never get us to that point. Here we keep the consistency
13327 between `current_class_type' and `current_class_ptr'. */
13328 tree t
= DECL_ARGUMENTS (decl1
);
13330 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13331 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13333 cp_function_chain
->x_current_class_ref
13334 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13335 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13336 cp_function_chain
->x_current_class_ptr
= t
;
13338 /* Constructors and destructors need to know whether they're "in
13339 charge" of initializing virtual base classes. */
13340 t
= DECL_CHAIN (t
);
13341 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13343 current_in_charge_parm
= t
;
13344 t
= DECL_CHAIN (t
);
13346 if (DECL_HAS_VTT_PARM_P (decl1
))
13348 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13349 current_vtt_parm
= t
;
13353 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13354 /* Implicitly-defined methods (like the
13355 destructor for a class in which no destructor
13356 is explicitly declared) must not be defined
13357 until their definition is needed. So, we
13358 ignore interface specifications for
13359 compiler-generated functions. */
13360 && !DECL_ARTIFICIAL (decl1
));
13362 if (processing_template_decl
)
13363 /* Don't mess with interface flags. */;
13364 else if (DECL_INTERFACE_KNOWN (decl1
))
13366 tree ctx
= decl_function_context (decl1
);
13368 if (DECL_NOT_REALLY_EXTERN (decl1
))
13369 DECL_EXTERNAL (decl1
) = 0;
13371 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13372 /* This is a function in a local class in an extern inline
13373 or template function. */
13374 comdat_linkage (decl1
);
13376 /* If this function belongs to an interface, it is public.
13377 If it belongs to someone else's interface, it is also external.
13378 This only affects inlines and template instantiations. */
13379 else if (!finfo
->interface_unknown
&& honor_interface
)
13381 if (DECL_DECLARED_INLINE_P (decl1
)
13382 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13384 DECL_EXTERNAL (decl1
)
13385 = (finfo
->interface_only
13386 || (DECL_DECLARED_INLINE_P (decl1
)
13387 && ! flag_implement_inlines
13388 && !DECL_VINDEX (decl1
)));
13390 /* For WIN32 we also want to put these in linkonce sections. */
13391 maybe_make_one_only (decl1
);
13394 DECL_EXTERNAL (decl1
) = 0;
13395 DECL_INTERFACE_KNOWN (decl1
) = 1;
13396 /* If this function is in an interface implemented in this file,
13397 make sure that the back end knows to emit this function
13399 if (!DECL_EXTERNAL (decl1
))
13400 mark_needed (decl1
);
13402 else if (finfo
->interface_unknown
&& finfo
->interface_only
13403 && honor_interface
)
13405 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13406 interface, we will have both finfo->interface_unknown and
13407 finfo->interface_only set. In that case, we don't want to
13408 use the normal heuristics because someone will supply a
13409 #pragma implementation elsewhere, and deducing it here would
13410 produce a conflict. */
13411 comdat_linkage (decl1
);
13412 DECL_EXTERNAL (decl1
) = 0;
13413 DECL_INTERFACE_KNOWN (decl1
) = 1;
13414 DECL_DEFER_OUTPUT (decl1
) = 1;
13418 /* This is a definition, not a reference.
13419 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13420 if (!GNU_INLINE_P (decl1
))
13421 DECL_EXTERNAL (decl1
) = 0;
13423 if ((DECL_DECLARED_INLINE_P (decl1
)
13424 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13425 && ! DECL_INTERFACE_KNOWN (decl1
))
13426 DECL_DEFER_OUTPUT (decl1
) = 1;
13428 DECL_INTERFACE_KNOWN (decl1
) = 1;
13431 /* Determine the ELF visibility attribute for the function. We must not
13432 do this before calling "pushdecl", as we must allow "duplicate_decls"
13433 to merge any attributes appropriately. We also need to wait until
13435 if (!DECL_CLONED_FUNCTION_P (decl1
))
13436 determine_visibility (decl1
);
13438 begin_scope (sk_function_parms
, decl1
);
13442 if (DECL_DESTRUCTOR_P (decl1
)
13443 || (DECL_CONSTRUCTOR_P (decl1
)
13444 && targetm
.cxx
.cdtor_returns_this ()))
13446 cdtor_label
= build_decl (input_location
,
13447 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13448 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13451 start_fname_decls ();
13453 store_parm_decls (current_function_parms
);
13459 /* Like start_preparsed_function, except that instead of a
13460 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13462 Returns true on success. If the DECLARATOR is not suitable
13463 for a function, we return false, which tells the parser to
13464 skip the entire function. */
13467 start_function (cp_decl_specifier_seq
*declspecs
,
13468 const cp_declarator
*declarator
,
13473 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13474 if (decl1
== error_mark_node
)
13476 /* If the declarator is not suitable for a function definition,
13477 cause a syntax error. */
13478 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13480 error ("invalid function declaration");
13484 if (DECL_MAIN_P (decl1
))
13485 /* main must return int. grokfndecl should have corrected it
13486 (and issued a diagnostic) if the user got it wrong. */
13487 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13488 integer_type_node
));
13490 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13493 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13497 use_eh_spec_block (tree fn
)
13499 return (flag_exceptions
&& flag_enforce_eh_specs
13500 && !processing_template_decl
13501 && !type_throw_all_p (TREE_TYPE (fn
))
13502 /* We insert the EH_SPEC_BLOCK only in the original
13503 function; then, it is copied automatically to the
13505 && !DECL_CLONED_FUNCTION_P (fn
)
13506 /* Implicitly-generated constructors and destructors have
13507 exception specifications. However, those specifications
13508 are the union of the possible exceptions specified by the
13509 constructors/destructors for bases and members, so no
13510 unallowed exception will ever reach this function. By
13511 not creating the EH_SPEC_BLOCK we save a little memory,
13512 and we avoid spurious warnings about unreachable
13514 && !DECL_DEFAULTED_FN (fn
));
13517 /* Store the parameter declarations into the current function declaration.
13518 This is called after parsing the parameter declarations, before
13519 digesting the body of the function.
13521 Also install to binding contour return value identifier, if any. */
13524 store_parm_decls (tree current_function_parms
)
13526 tree fndecl
= current_function_decl
;
13529 /* This is a chain of any other decls that came in among the parm
13530 declarations. If a parm is declared with enum {foo, bar} x;
13531 then CONST_DECLs for foo and bar are put here. */
13532 tree nonparms
= NULL_TREE
;
13534 if (current_function_parms
)
13536 /* This case is when the function was defined with an ANSI prototype.
13537 The parms already have decls, so we need not do anything here
13538 except record them as in effect
13539 and complain if any redundant old-style parm decls were written. */
13541 tree specparms
= current_function_parms
;
13544 /* Must clear this because it might contain TYPE_DECLs declared
13546 current_binding_level
->names
= NULL
;
13548 /* If we're doing semantic analysis, then we'll call pushdecl
13549 for each of these. We must do them in reverse order so that
13550 they end in the correct forward order. */
13551 specparms
= nreverse (specparms
);
13553 for (parm
= specparms
; parm
; parm
= next
)
13555 next
= DECL_CHAIN (parm
);
13556 if (TREE_CODE (parm
) == PARM_DECL
)
13558 if (DECL_NAME (parm
) == NULL_TREE
13559 || !VOID_TYPE_P (parm
))
13562 error ("parameter %qD declared void", parm
);
13566 /* If we find an enum constant or a type tag,
13567 put it aside for the moment. */
13568 TREE_CHAIN (parm
) = NULL_TREE
;
13569 nonparms
= chainon (nonparms
, parm
);
13573 /* Get the decls in their original chain order and record in the
13574 function. This is all and only the PARM_DECLs that were
13575 pushed into scope by the loop above. */
13576 DECL_ARGUMENTS (fndecl
) = getdecls ();
13579 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13581 /* Now store the final chain of decls for the arguments
13582 as the decl-chain of the current lexical scope.
13583 Put the enumerators in as well, at the front so that
13584 DECL_ARGUMENTS is not modified. */
13585 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13587 if (use_eh_spec_block (current_function_decl
))
13588 current_eh_spec_block
= begin_eh_spec_block ();
13592 /* We have finished doing semantic analysis on DECL, but have not yet
13593 generated RTL for its body. Save away our current state, so that
13594 when we want to generate RTL later we know what to do. */
13597 save_function_data (tree decl
)
13599 struct language_function
*f
;
13601 /* Save the language-specific per-function data so that we can
13602 get it back when we really expand this function. */
13603 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13606 f
= ggc_alloc_language_function ();
13607 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13608 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13610 /* Clear out the bits we don't need. */
13611 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13612 f
->bindings
= NULL
;
13613 f
->x_local_names
= NULL
;
13614 f
->base
.local_typedefs
= NULL
;
13618 /* Set the return value of the constructor (if present). */
13621 finish_constructor_body (void)
13626 if (targetm
.cxx
.cdtor_returns_this ()
13627 && (! TYPE_FOR_JAVA (current_class_type
)))
13629 /* Any return from a constructor will end up here. */
13630 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13632 val
= DECL_ARGUMENTS (current_function_decl
);
13633 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13634 DECL_RESULT (current_function_decl
), val
);
13635 /* Return the address of the object. */
13636 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13637 add_stmt (exprstmt
);
13641 /* Do all the processing for the beginning of a destructor; set up the
13642 vtable pointers and cleanups for bases and members. */
13645 begin_destructor_body (void)
13647 tree compound_stmt
;
13649 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13650 issued an error message. We still want to try to process the
13651 body of the function, but initialize_vtbl_ptrs will crash if
13652 TYPE_BINFO is NULL. */
13653 if (COMPLETE_TYPE_P (current_class_type
))
13655 compound_stmt
= begin_compound_stmt (0);
13656 /* Make all virtual function table pointers in non-virtual base
13657 classes point to CURRENT_CLASS_TYPE's virtual function
13659 initialize_vtbl_ptrs (current_class_ptr
);
13660 finish_compound_stmt (compound_stmt
);
13662 /* Insert a cleanup to let the back end know that the object is dead
13663 when we exit the destructor, either normally or via exception. */
13664 tree clobber
= build_constructor (current_class_type
, NULL
);
13665 TREE_THIS_VOLATILE (clobber
) = true;
13666 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13667 current_class_ref
, clobber
);
13668 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13670 /* And insert cleanups for our bases and members so that they
13671 will be properly destroyed if we throw. */
13672 push_base_cleanups ();
13676 /* At the end of every destructor we generate code to delete the object if
13677 necessary. Do that now. */
13680 finish_destructor_body (void)
13684 /* Any return from a destructor will end up here; that way all base
13685 and member cleanups will be run when the function returns. */
13686 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13688 /* In a virtual destructor, we must call delete. */
13689 if (DECL_VIRTUAL_P (current_function_decl
))
13692 tree virtual_size
= cxx_sizeof (current_class_type
);
13696 At the point of definition of a virtual destructor (including
13697 an implicit definition), non-placement operator delete shall
13698 be looked up in the scope of the destructor's class and if
13699 found shall be accessible and unambiguous. */
13700 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13702 /*global_p=*/false,
13703 /*placement=*/NULL_TREE
,
13704 /*alloc_fn=*/NULL_TREE
,
13705 tf_warning_or_error
);
13707 if_stmt
= begin_if_stmt ();
13708 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13709 current_in_charge_parm
,
13712 finish_expr_stmt (exprstmt
);
13713 finish_then_clause (if_stmt
);
13714 finish_if_stmt (if_stmt
);
13717 if (targetm
.cxx
.cdtor_returns_this ())
13721 val
= DECL_ARGUMENTS (current_function_decl
);
13722 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13723 DECL_RESULT (current_function_decl
), val
);
13724 /* Return the address of the object. */
13725 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13726 add_stmt (exprstmt
);
13730 /* Do the necessary processing for the beginning of a function body, which
13731 in this case includes member-initializers, but not the catch clauses of
13732 a function-try-block. Currently, this means opening a binding level
13733 for the member-initializers (in a ctor), member cleanups (in a dtor),
13734 and capture proxies (in a lambda operator()). */
13737 begin_function_body (void)
13741 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13744 if (processing_template_decl
)
13745 /* Do nothing now. */;
13747 /* Always keep the BLOCK node associated with the outermost pair of
13748 curly braces of a function. These are needed for correct
13749 operation of dwarfout.c. */
13750 keep_next_level (true);
13752 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13754 if (processing_template_decl
)
13755 /* Do nothing now. */;
13756 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13757 begin_destructor_body ();
13762 /* Do the processing for the end of a function body. Currently, this means
13763 closing out the cleanups for fully-constructed bases and members, and in
13764 the case of the destructor, deleting the object if desired. Again, this
13765 is only meaningful for [cd]tors, since they are the only functions where
13766 there is a significant distinction between the main body and any
13767 function catch clauses. Handling, say, main() return semantics here
13768 would be wrong, as flowing off the end of a function catch clause for
13769 main() would also need to return 0. */
13772 finish_function_body (tree compstmt
)
13774 if (compstmt
== NULL_TREE
)
13777 /* Close the block. */
13778 finish_compound_stmt (compstmt
);
13780 if (processing_template_decl
)
13781 /* Do nothing now. */;
13782 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13783 finish_constructor_body ();
13784 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13785 finish_destructor_body ();
13788 /* Given a function, returns the BLOCK corresponding to the outermost level
13789 of curly braces, skipping the artificial block created for constructor
13793 outer_curly_brace_block (tree fndecl
)
13795 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13796 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13797 /* Skip the artificial function body block. */
13798 block
= BLOCK_SUBBLOCKS (block
);
13802 /* If FNDECL is a class's key method, add the class to the list of
13803 keyed classes that should be emitted. */
13806 record_key_method_defined (tree fndecl
)
13808 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13809 && DECL_VIRTUAL_P (fndecl
)
13810 && !processing_template_decl
)
13812 tree fnclass
= DECL_CONTEXT (fndecl
);
13813 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13814 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13818 /* Subroutine of finish_function.
13819 Save the body of constexpr functions for possible
13820 future compile time evaluation. */
13823 maybe_save_function_definition (tree fun
)
13825 if (!processing_template_decl
13826 && DECL_DECLARED_CONSTEXPR_P (fun
)
13827 && !DECL_CLONED_FUNCTION_P (fun
))
13828 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13831 /* Finish up a function declaration and compile that function
13832 all the way to assembler language output. The free the storage
13833 for the function definition.
13835 FLAGS is a bitwise or of the following values:
13837 We just finished processing the body of an in-class inline
13838 function definition. (This processing will have taken place
13839 after the class definition is complete.) */
13842 finish_function (int flags
)
13844 tree fndecl
= current_function_decl
;
13845 tree fntype
, ctype
= NULL_TREE
;
13846 int inclass_inline
= (flags
& 2) != 0;
13848 /* When we get some parse errors, we can end up without a
13849 current_function_decl, so cope. */
13850 if (fndecl
== NULL_TREE
)
13851 return error_mark_node
;
13853 if (c_dialect_objc ())
13854 objc_finish_function ();
13856 gcc_assert (!defer_mark_used_calls
);
13857 defer_mark_used_calls
= true;
13859 record_key_method_defined (fndecl
);
13861 fntype
= TREE_TYPE (fndecl
);
13863 /* TREE_READONLY (fndecl) = 1;
13864 This caused &foo to be of type ptr-to-const-function
13865 which then got a warning when stored in a ptr-to-function variable. */
13867 gcc_assert (building_stmt_list_p ());
13868 /* The current function is being defined, so its DECL_INITIAL should
13869 be set, and unless there's a multiple definition, it should be
13870 error_mark_node. */
13871 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13873 /* For a cloned function, we've already got all the code we need;
13874 there's no need to add any extra bits. */
13875 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13877 /* Make it so that `main' always returns 0 by default. */
13878 if (DECL_MAIN_P (current_function_decl
))
13879 finish_return_stmt (integer_zero_node
);
13881 if (use_eh_spec_block (current_function_decl
))
13882 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13883 (TREE_TYPE (current_function_decl
)),
13884 current_eh_spec_block
);
13887 /* If we're saving up tree structure, tie off the function now. */
13888 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13890 finish_fname_decls ();
13892 /* If this function can't throw any exceptions, remember that. */
13893 if (!processing_template_decl
13894 && !cp_function_chain
->can_throw
13895 && !flag_non_call_exceptions
13896 && !decl_replaceable_p (fndecl
))
13897 TREE_NOTHROW (fndecl
) = 1;
13899 /* This must come after expand_function_end because cleanups might
13900 have declarations (from inline functions) that need to go into
13901 this function's blocks. */
13903 /* If the current binding level isn't the outermost binding level
13904 for this function, either there is a bug, or we have experienced
13905 syntax errors and the statement tree is malformed. */
13906 if (current_binding_level
->kind
!= sk_function_parms
)
13908 /* Make sure we have already experienced errors. */
13909 gcc_assert (errorcount
);
13911 /* Throw away the broken statement tree and extra binding
13913 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13915 while (current_binding_level
->kind
!= sk_function_parms
)
13917 if (current_binding_level
->kind
== sk_class
)
13918 pop_nested_class ();
13920 poplevel (0, 0, 0);
13923 poplevel (1, 0, 1);
13925 /* Statements should always be full-expressions at the outermost set
13926 of curly braces for a function. */
13927 gcc_assert (stmts_are_full_exprs_p ());
13929 /* If there are no return statements in a function with auto return type,
13930 the return type is void. But if the declared type is something like
13931 auto*, this is an error. */
13932 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13933 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13935 if (!is_auto (current_function_auto_return_pattern
)
13936 && !current_function_returns_value
&& !current_function_returns_null
)
13938 error ("no return statements in function returning %qT",
13939 current_function_auto_return_pattern
);
13940 inform (input_location
, "only plain %<auto%> return type can be "
13941 "deduced to %<void%>");
13943 apply_deduced_return_type (fndecl
, void_type_node
);
13944 fntype
= TREE_TYPE (fndecl
);
13947 /* Save constexpr function body before it gets munged by
13948 the NRV transformation. */
13949 maybe_save_function_definition (fndecl
);
13951 /* Set up the named return value optimization, if we can. Candidate
13952 variables are selected in check_return_expr. */
13953 if (current_function_return_value
)
13955 tree r
= current_function_return_value
;
13958 if (r
!= error_mark_node
13959 /* This is only worth doing for fns that return in memory--and
13960 simpler, since we don't have to worry about promoted modes. */
13961 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13962 /* Only allow this for variables declared in the outer scope of
13963 the function so we know that their lifetime always ends with a
13964 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13965 we were to do this optimization in tree-ssa. */
13966 && (outer
= outer_curly_brace_block (fndecl
))
13967 && chain_member (r
, BLOCK_VARS (outer
)))
13968 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13970 current_function_return_value
= NULL_TREE
;
13973 /* Remember that we were in class scope. */
13974 if (current_class_name
)
13975 ctype
= current_class_type
;
13977 /* Must mark the RESULT_DECL as being in this function. */
13978 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13980 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13981 to the FUNCTION_DECL node itself. */
13982 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13984 /* Save away current state, if appropriate. */
13985 if (!processing_template_decl
)
13986 save_function_data (fndecl
);
13988 /* Complain if there's just no return statement. */
13989 if (warn_return_type
13990 && !VOID_TYPE_P (TREE_TYPE (fntype
))
13991 && !dependent_type_p (TREE_TYPE (fntype
))
13992 && !current_function_returns_value
&& !current_function_returns_null
13993 /* Don't complain if we abort or throw. */
13994 && !current_function_returns_abnormally
13995 /* Don't complain if we are declared noreturn. */
13996 && !TREE_THIS_VOLATILE (fndecl
)
13997 && !DECL_NAME (DECL_RESULT (fndecl
))
13998 && !TREE_NO_WARNING (fndecl
)
13999 /* Structor return values (if any) are set by the compiler. */
14000 && !DECL_CONSTRUCTOR_P (fndecl
)
14001 && !DECL_DESTRUCTOR_P (fndecl
)
14002 && targetm
.warn_func_return (fndecl
))
14004 warning (OPT_Wreturn_type
,
14005 "no return statement in function returning non-void");
14006 TREE_NO_WARNING (fndecl
) = 1;
14009 /* Store the end of the function, so that we get good line number
14010 info for the epilogue. */
14011 cfun
->function_end_locus
= input_location
;
14013 /* Complain about parameters that are only set, but never otherwise used. */
14014 if (warn_unused_but_set_parameter
14015 && !processing_template_decl
14016 && errorcount
== unused_but_set_errorcount
14017 && !DECL_CLONED_FUNCTION_P (fndecl
))
14021 for (decl
= DECL_ARGUMENTS (fndecl
);
14023 decl
= DECL_CHAIN (decl
))
14024 if (TREE_USED (decl
)
14025 && TREE_CODE (decl
) == PARM_DECL
14026 && !DECL_READ_P (decl
)
14027 && DECL_NAME (decl
)
14028 && !DECL_ARTIFICIAL (decl
)
14029 && !TREE_NO_WARNING (decl
)
14030 && !DECL_IN_SYSTEM_HEADER (decl
)
14031 && TREE_TYPE (decl
) != error_mark_node
14032 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14033 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14034 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14035 warning (OPT_Wunused_but_set_parameter
,
14036 "parameter %q+D set but not used", decl
);
14037 unused_but_set_errorcount
= errorcount
;
14040 /* Complain about locally defined typedefs that are not used in this
14042 maybe_warn_unused_local_typedefs ();
14044 /* Genericize before inlining. */
14045 if (!processing_template_decl
)
14047 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14048 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14049 cp_genericize (fndecl
);
14050 /* Clear out the bits we don't need. */
14051 f
->x_current_class_ptr
= NULL
;
14052 f
->x_current_class_ref
= NULL
;
14053 f
->x_eh_spec_block
= NULL
;
14054 f
->x_in_charge_parm
= NULL
;
14055 f
->x_vtt_parm
= NULL
;
14056 f
->x_return_value
= NULL
;
14057 f
->bindings
= NULL
;
14058 f
->extern_decl_map
= NULL
;
14060 /* Clear out the bits we don't need. */
14061 local_names
= NULL
;
14063 /* We're leaving the context of this function, so zap cfun. It's still in
14064 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14066 current_function_decl
= NULL
;
14068 /* If this is an in-class inline definition, we may have to pop the
14069 bindings for the template parameters that we added in
14070 maybe_begin_member_template_processing when start_function was
14072 if (inclass_inline
)
14073 maybe_end_member_template_processing ();
14075 /* Leave the scope of the class. */
14077 pop_nested_class ();
14082 current_function_decl
= NULL_TREE
;
14084 defer_mark_used_calls
= false;
14085 if (deferred_mark_used_calls
)
14090 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14092 vec_free (deferred_mark_used_calls
);
14098 /* Create the FUNCTION_DECL for a function definition.
14099 DECLSPECS and DECLARATOR are the parts of the declaration;
14100 they describe the return type and the name of the function,
14101 but twisted together in a fashion that parallels the syntax of C.
14103 This function creates a binding context for the function body
14104 as well as setting up the FUNCTION_DECL in current_function_decl.
14106 Returns a FUNCTION_DECL on success.
14108 If the DECLARATOR is not suitable for a function (it defines a datum
14109 instead), we return 0, which tells yyparse to report a parse error.
14111 May return void_type_node indicating that this method is actually
14112 a friend. See grokfield for more details.
14114 Came here with a `.pushlevel' .
14116 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14117 CHANGES TO CODE IN `grokfield'. */
14120 grokmethod (cp_decl_specifier_seq
*declspecs
,
14121 const cp_declarator
*declarator
, tree attrlist
)
14123 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14126 if (fndecl
== error_mark_node
)
14127 return error_mark_node
;
14129 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14131 error ("invalid member function declaration");
14132 return error_mark_node
;
14136 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14138 /* Pass friends other than inline friend functions back. */
14139 if (fndecl
== void_type_node
)
14142 if (DECL_IN_AGGR_P (fndecl
))
14144 if (DECL_CLASS_SCOPE_P (fndecl
))
14145 error ("%qD is already defined in class %qT", fndecl
,
14146 DECL_CONTEXT (fndecl
));
14147 return error_mark_node
;
14150 check_template_shadow (fndecl
);
14152 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14153 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14155 /* We process method specializations in finish_struct_1. */
14156 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14158 fndecl
= push_template_decl (fndecl
);
14159 if (fndecl
== error_mark_node
)
14163 if (! DECL_FRIEND_P (fndecl
))
14165 if (DECL_CHAIN (fndecl
))
14167 fndecl
= copy_node (fndecl
);
14168 TREE_CHAIN (fndecl
) = NULL_TREE
;
14172 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14174 DECL_IN_AGGR_P (fndecl
) = 1;
14179 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14180 we can lay it out later, when and if its type becomes complete.
14182 Also handle constexpr pointer to member variables where the initializer
14183 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14186 maybe_register_incomplete_var (tree var
)
14188 gcc_assert (VAR_P (var
));
14190 /* Keep track of variables with incomplete types. */
14191 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14192 && DECL_EXTERNAL (var
))
14194 tree inner_type
= TREE_TYPE (var
);
14196 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14197 inner_type
= TREE_TYPE (inner_type
);
14198 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14200 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14201 /* RTTI TD entries are created while defining the type_info. */
14202 || (TYPE_LANG_SPECIFIC (inner_type
)
14203 && TYPE_BEING_DEFINED (inner_type
)))
14205 incomplete_var iv
= {var
, inner_type
};
14206 vec_safe_push (incomplete_vars
, iv
);
14208 else if (TYPE_PTRMEM_P (inner_type
)
14209 && DECL_INITIAL (var
)
14210 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14212 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14213 gcc_assert (TYPE_BEING_DEFINED (context
));
14214 incomplete_var iv
= {var
, context
};
14215 vec_safe_push (incomplete_vars
, iv
);
14220 /* Called when a class type (given by TYPE) is defined. If there are
14221 any existing VAR_DECLs whose type has been completed by this
14222 declaration, update them now. */
14225 complete_vars (tree type
)
14228 incomplete_var
*iv
;
14230 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14232 if (same_type_p (type
, iv
->incomplete_type
))
14234 tree var
= iv
->decl
;
14235 tree type
= TREE_TYPE (var
);
14237 if (TYPE_PTRMEM_P (type
))
14238 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14241 /* Complete the type of the variable. The VAR_DECL itself
14242 will be laid out in expand_expr. */
14243 complete_type (type
);
14244 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14247 /* Remove this entry from the list. */
14248 incomplete_vars
->unordered_remove (ix
);
14254 /* Check for pending declarations which may have abstract type. */
14255 complete_type_check_abstract (type
);
14258 /* If DECL is of a type which needs a cleanup, build and return an
14259 expression to perform that cleanup here. Return NULL_TREE if no
14260 cleanup need be done. */
14263 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14269 /* Assume no cleanup is required. */
14270 cleanup
= NULL_TREE
;
14272 if (error_operand_p (decl
))
14275 /* Handle "__attribute__((cleanup))". We run the cleanup function
14276 before the destructor since the destructor is what actually
14277 terminates the lifetime of the object. */
14278 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14285 /* Get the name specified by the user for the cleanup function. */
14286 id
= TREE_VALUE (TREE_VALUE (attr
));
14287 /* Look up the name to find the cleanup function to call. It is
14288 important to use lookup_name here because that is what is
14289 used in c-common.c:handle_cleanup_attribute when performing
14290 initial checks on the attribute. Note that those checks
14291 include ensuring that the function found is not an overloaded
14292 function, or an object with an overloaded call operator,
14293 etc.; we can rely on the fact that the function found is an
14294 ordinary FUNCTION_DECL. */
14295 fn
= lookup_name (id
);
14296 arg
= build_address (decl
);
14298 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14299 if (cleanup
== error_mark_node
)
14300 return error_mark_node
;
14302 /* Handle ordinary C++ destructors. */
14303 type
= TREE_TYPE (decl
);
14304 if (type_build_dtor_call (type
))
14306 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14310 if (TREE_CODE (type
) == ARRAY_TYPE
)
14313 addr
= build_address (decl
);
14315 call
= build_delete (TREE_TYPE (addr
), addr
,
14316 sfk_complete_destructor
, flags
, 0, complain
);
14317 if (call
== error_mark_node
)
14318 cleanup
= error_mark_node
;
14319 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14320 /* Discard the call. */;
14322 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14327 /* build_delete sets the location of the destructor call to the
14328 current location, even though the destructor is going to be
14329 called later, at the end of the current scope. This can lead to
14330 a "jumpy" behaviour for users of debuggers when they step around
14331 the end of the block. So let's unset the location of the
14332 destructor call instead. */
14333 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14334 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14339 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14340 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14341 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14344 static_fn_type (tree memfntype
)
14349 if (TYPE_PTRMEMFUNC_P (memfntype
))
14350 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14351 if (POINTER_TYPE_P (memfntype
)
14352 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14353 memfntype
= TREE_TYPE (memfntype
);
14354 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14356 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14357 args
= TYPE_ARG_TYPES (memfntype
);
14358 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14359 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14360 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14361 fntype
= (cp_build_type_attribute_variant
14362 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14363 fntype
= (build_exception_variant
14364 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14368 /* DECL was originally constructed as a non-static member function,
14369 but turned out to be static. Update it accordingly. */
14372 revert_static_member_fn (tree decl
)
14374 tree stype
= static_fn_type (decl
);
14375 cp_cv_quals quals
= type_memfn_quals (stype
);
14376 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14378 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14379 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14381 TREE_TYPE (decl
) = stype
;
14383 if (DECL_ARGUMENTS (decl
))
14384 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14385 DECL_STATIC_FUNCTION_P (decl
) = 1;
14388 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14389 one of the language-independent trees. */
14391 enum cp_tree_node_structure_enum
14392 cp_tree_node_structure (union lang_tree_node
* t
)
14394 switch (TREE_CODE (&t
->generic
))
14396 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14397 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14398 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14399 case OVERLOAD
: return TS_CP_OVERLOAD
;
14400 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14401 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14402 case BASELINK
: return TS_CP_BASELINK
;
14403 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14404 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14405 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14406 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14407 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14408 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14409 default: return TS_CP_GENERIC
;
14413 /* Build the void_list_node (void_type_node having been created). */
14415 build_void_list_node (void)
14417 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14422 cp_missing_noreturn_ok_p (tree decl
)
14424 /* A missing noreturn is ok for the `main' function. */
14425 return DECL_MAIN_P (decl
);
14428 /* Return the COMDAT group into which DECL should be placed. */
14431 cxx_comdat_group (tree decl
)
14435 /* Virtual tables, construction virtual tables, and virtual table
14436 tables all go in a single COMDAT group, named after the primary
14438 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14439 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14440 /* For all other DECLs, the COMDAT group is the mangled name of the
14441 declaration itself. */
14444 while (DECL_THUNK_P (decl
))
14446 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14447 into the same section as the target function. In that case
14448 we must return target's name. */
14449 tree target
= THUNK_TARGET (decl
);
14450 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14451 && DECL_SECTION_NAME (target
) != NULL
14452 && DECL_ONE_ONLY (target
))
14457 name
= DECL_ASSEMBLER_NAME (decl
);
14463 /* Returns the return type for FN as written by the user, which may include
14464 a placeholder for a deduced return type. */
14467 fndecl_declared_return_type (tree fn
)
14469 fn
= STRIP_TEMPLATE (fn
);
14470 if (FNDECL_USED_AUTO (fn
))
14472 struct language_function
*f
= NULL
;
14473 if (DECL_STRUCT_FUNCTION (fn
))
14474 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14476 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14477 return f
->x_auto_return_pattern
;
14479 return TREE_TYPE (TREE_TYPE (fn
));
14482 /* Returns true iff DECL was declared with an auto return type and it has
14483 not yet been deduced to a real type. */
14486 undeduced_auto_decl (tree decl
)
14488 if (cxx_dialect
< cxx1y
)
14490 return type_uses_auto (TREE_TYPE (decl
));
14493 /* Complain if DECL has an undeduced return type. */
14496 require_deduced_type (tree decl
)
14498 if (undeduced_auto_decl (decl
))
14499 error ("use of %qD before deduction of %<auto%>", decl
);
14502 #include "gt-cp-decl.h"