1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2014 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
34 #include "tree-hasher.h"
35 #include "stringpool.h"
36 #include "stor-layout.h"
42 #include "tree-iterator.h"
43 #include "tree-inline.h"
50 #include "c-family/c-common.h"
51 #include "c-family/c-objc.h"
52 #include "c-family/c-pragma.h"
53 #include "c-family/c-target.h"
54 #include "c-family/c-ubsan.h"
55 #include "diagnostic.h"
59 #include "splay-tree.h"
63 #include "plugin-api.h"
67 #include "hard-reg-set.h"
76 /* Possible cases of bad specifiers type used by bad_specifiers. */
78 BSP_VAR
, /* variable */
79 BSP_PARM
, /* parameter */
84 static tree
grokparms (tree parmlist
, tree
*);
85 static const char *redeclaration_error_message (tree
, tree
);
87 static int decl_jump_unsafe (tree
);
88 static void require_complete_types_for_parms (tree
);
89 static int ambi_op_p (enum tree_code
);
90 static int unary_op_p (enum tree_code
);
91 static void push_local_name (tree
);
92 static tree
grok_reference_init (tree
, tree
, tree
, int);
93 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
95 static int check_static_variable_definition (tree
, tree
);
96 static void record_unknown_type (tree
, const char *);
97 static tree
builtin_function_1 (tree
, tree
, bool);
98 static int member_function_or_else (tree
, tree
, enum overload_flags
);
99 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
101 static void check_for_uninitialized_const_var (tree
);
102 static tree
local_variable_p_walkfn (tree
*, int *, void *);
103 static tree
record_builtin_java_type (const char *, int);
104 static const char *tag_name (enum tag_types
);
105 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
106 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
107 static void maybe_deduce_size_from_array_init (tree
, tree
);
108 static void layout_var_decl (tree
);
109 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
110 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
111 static void save_function_data (tree
);
112 static void copy_type_enum (tree
, tree
);
113 static void check_function_type (tree
, tree
);
114 static void finish_constructor_body (void);
115 static void begin_destructor_body (void);
116 static void finish_destructor_body (void);
117 static void record_key_method_defined (tree
);
118 static tree
create_array_type_for_decl (tree
, tree
, tree
);
119 static tree
get_atexit_node (void);
120 static tree
get_dso_handle_node (void);
121 static tree
start_cleanup_fn (void);
122 static void end_cleanup_fn (void);
123 static tree
cp_make_fname_decl (location_t
, tree
, int);
124 static void initialize_predefined_identifiers (void);
125 static tree check_special_function_return_type
126 (special_function_kind
, tree
, tree
);
127 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
128 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
129 static void store_parm_decls (tree
);
130 static void initialize_local_var (tree
, tree
);
131 static void expand_static_init (tree
, tree
);
133 /* The following symbols are subsumed in the cp_global_trees array, and
134 listed here individually for documentation purposes.
137 tree wchar_decl_node;
139 tree vtable_entry_type;
140 tree delta_type_node;
141 tree __t_desc_type_node;
143 tree class_type_node;
144 tree unknown_type_node;
146 Array type `vtable_entry_type[]'
149 tree vtbl_ptr_type_node;
156 A FUNCTION_DECL which can call `abort'. Not necessarily the
157 one that the user will declare, but sufficient to be called
158 by routines that want to abort the program.
162 The FUNCTION_DECL for the default `::operator delete'.
164 tree global_delete_fndecl;
167 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
168 tree tinfo_var_id; */
170 tree cp_global_trees
[CPTI_MAX
];
172 /* Indicates that there is a type value in some namespace, although
173 that is not necessarily in scope at the moment. */
175 tree global_type_node
;
177 /* The node that holds the "name" of the global scope. */
178 tree global_scope_name
;
180 #define local_names cp_function_chain->x_local_names
182 /* A list of objects which have constructors or destructors
183 which reside in the global scope. The decl is stored in
184 the TREE_VALUE slot and the initializer is stored
185 in the TREE_PURPOSE slot. */
186 tree static_aggregates
;
188 /* Like static_aggregates, but for thread_local variables. */
193 /* A node for the integer constant 2. */
195 tree integer_two_node
;
197 /* Used only for jumps to as-yet undefined labels, since jumps to
198 defined labels can have their validity checked immediately. */
200 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
201 struct named_label_use_entry
*next
;
202 /* The binding level to which this entry is *currently* attached.
203 This is initially the binding level in which the goto appeared,
204 but is modified as scopes are closed. */
205 cp_binding_level
*binding_level
;
206 /* The head of the names list that was current when the goto appeared,
207 or the inner scope popped. These are the decls that will *not* be
208 skipped when jumping to the label. */
210 /* The location of the goto, for error reporting. */
211 location_t o_goto_locus
;
212 /* True if an OpenMP structured block scope has been closed since
213 the goto appeared. This means that the branch from the label will
214 illegally exit an OpenMP scope. */
218 /* A list of all LABEL_DECLs in the function that have names. Here so
219 we can clear out their names' definitions at the end of the
220 function, and so we can check the validity of jumps to these labels. */
222 struct GTY((for_user
)) named_label_entry
{
223 /* The decl itself. */
226 /* The binding level to which the label is *currently* attached.
227 This is initially set to the binding level in which the label
228 is defined, but is modified as scopes are closed. */
229 cp_binding_level
*binding_level
;
230 /* The head of the names list that was current when the label was
231 defined, or the inner scope popped. These are the decls that will
232 be skipped when jumping to the label. */
234 /* A vector of all decls from all binding levels that would be
235 crossed by a backward branch to the label. */
236 vec
<tree
, va_gc
> *bad_decls
;
238 /* A list of uses of the label, before the label is defined. */
239 struct named_label_use_entry
*uses
;
241 /* The following bits are set after the label is defined, and are
242 updated as scopes are popped. They indicate that a backward jump
243 to the label will illegally enter a scope of the given flavor. */
249 #define named_labels cp_function_chain->x_named_labels
251 /* The number of function bodies which we are currently processing.
252 (Zero if we are at namespace scope, one inside the body of a
253 function, two inside the body of a function in a local class, etc.) */
256 /* To avoid unwanted recursion, finish_function defers all mark_used calls
257 encountered during its execution until it finishes. */
258 bool defer_mark_used_calls
;
259 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
261 /* States indicating how grokdeclarator() should handle declspecs marked
262 with __attribute__((deprecated)). An object declared as
263 __attribute__((deprecated)) suppresses warnings of uses of other
265 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
268 /* A list of VAR_DECLs whose type was incomplete at the time the
269 variable was declared. */
271 typedef struct GTY(()) incomplete_var_d
{
273 tree incomplete_type
;
277 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
279 /* Returns the kind of template specialization we are currently
280 processing, given that it's declaration contained N_CLASS_SCOPES
281 explicit scope qualifications. */
284 current_tmpl_spec_kind (int n_class_scopes
)
286 int n_template_parm_scopes
= 0;
287 int seen_specialization_p
= 0;
288 int innermost_specialization_p
= 0;
291 /* Scan through the template parameter scopes. */
292 for (b
= current_binding_level
;
293 b
->kind
== sk_template_parms
;
296 /* If we see a specialization scope inside a parameter scope,
297 then something is wrong. That corresponds to a declaration
300 template <class T> template <> ...
302 which is always invalid since [temp.expl.spec] forbids the
303 specialization of a class member template if the enclosing
304 class templates are not explicitly specialized as well. */
305 if (b
->explicit_spec_p
)
307 if (n_template_parm_scopes
== 0)
308 innermost_specialization_p
= 1;
310 seen_specialization_p
= 1;
312 else if (seen_specialization_p
== 1)
313 return tsk_invalid_member_spec
;
315 ++n_template_parm_scopes
;
318 /* Handle explicit instantiations. */
319 if (processing_explicit_instantiation
)
321 if (n_template_parm_scopes
!= 0)
322 /* We've seen a template parameter list during an explicit
323 instantiation. For example:
325 template <class T> template void f(int);
327 This is erroneous. */
328 return tsk_invalid_expl_inst
;
330 return tsk_expl_inst
;
333 if (n_template_parm_scopes
< n_class_scopes
)
334 /* We've not seen enough template headers to match all the
335 specialized classes present. For example:
337 template <class T> void R<T>::S<T>::f(int);
339 This is invalid; there needs to be one set of template
340 parameters for each class. */
341 return tsk_insufficient_parms
;
342 else if (n_template_parm_scopes
== n_class_scopes
)
343 /* We're processing a non-template declaration (even though it may
344 be a member of a template class.) For example:
346 template <class T> void S<T>::f(int);
348 The `class T' matches the `S<T>', leaving no template headers
349 corresponding to the `f'. */
351 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
352 /* We've got too many template headers. For example:
354 template <> template <class T> void f (T);
356 There need to be more enclosing classes. */
357 return tsk_excessive_parms
;
359 /* This must be a template. It's of the form:
361 template <class T> template <class U> void S<T>::f(U);
363 This is a specialization if the innermost level was a
364 specialization; otherwise it's just a definition of the
366 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
369 /* Exit the current scope. */
377 /* When a label goes out of scope, check to see if that label was used
378 in a valid manner, and issue any appropriate warnings or errors. */
381 pop_label (tree label
, tree old_value
)
383 if (!processing_template_decl
)
385 if (DECL_INITIAL (label
) == NULL_TREE
)
389 error ("label %q+D used but not defined", label
);
390 location
= input_location
;
391 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
392 /* Avoid crashing later. */
393 define_label (location
, DECL_NAME (label
));
396 warn_for_unused_label (label
);
399 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
402 /* At the end of a function, all labels declared within the function
403 go out of scope. BLOCK is the top-level block for the
407 pop_labels_1 (named_label_entry
**slot
, tree block
)
409 struct named_label_entry
*ent
= *slot
;
411 pop_label (ent
->label_decl
, NULL_TREE
);
413 /* Put the labels into the "variables" of the top-level block,
414 so debugger can see them. */
415 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
416 BLOCK_VARS (block
) = ent
->label_decl
;
418 named_labels
->clear_slot (slot
);
424 pop_labels (tree block
)
428 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
433 /* At the end of a block with local labels, restore the outer definition. */
436 pop_local_label (tree label
, tree old_value
)
438 struct named_label_entry dummy
;
440 pop_label (label
, old_value
);
442 dummy
.label_decl
= label
;
443 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
444 named_labels
->clear_slot (slot
);
447 /* The following two routines are used to interface to Objective-C++.
448 The binding level is purposely treated as an opaque type. */
451 objc_get_current_scope (void)
453 return current_binding_level
;
456 /* The following routine is used by the NeXT-style SJLJ exceptions;
457 variables get marked 'volatile' so as to not be clobbered by
458 _setjmp()/_longjmp() calls. All variables in the current scope,
459 as well as parent scopes up to (but not including) ENCLOSING_BLK
460 shall be thusly marked. */
463 objc_mark_locals_volatile (void *enclosing_blk
)
465 cp_binding_level
*scope
;
467 for (scope
= current_binding_level
;
468 scope
&& scope
!= enclosing_blk
;
469 scope
= scope
->level_chain
)
473 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
474 objc_volatilize_decl (decl
);
476 /* Do not climb up past the current function. */
477 if (scope
->kind
== sk_function_parms
)
482 /* Update data for defined and undefined labels when leaving a scope. */
485 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
487 named_label_entry
*ent
= *slot
;
488 cp_binding_level
*obl
= bl
->level_chain
;
490 if (ent
->binding_level
== bl
)
494 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
495 TREE_LISTs representing OVERLOADs, so be careful. */
496 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
498 : TREE_CHAIN (decl
)))
499 if (decl_jump_unsafe (decl
))
500 vec_safe_push (ent
->bad_decls
, decl
);
502 ent
->binding_level
= obl
;
503 ent
->names_in_scope
= obl
->names
;
507 ent
->in_try_scope
= true;
510 ent
->in_catch_scope
= true;
513 ent
->in_omp_scope
= true;
521 struct named_label_use_entry
*use
;
523 for (use
= ent
->uses
; use
; use
= use
->next
)
524 if (use
->binding_level
== bl
)
526 use
->binding_level
= obl
;
527 use
->names_in_scope
= obl
->names
;
528 if (bl
->kind
== sk_omp
)
529 use
->in_omp_scope
= true;
536 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
537 when errors were reported, except for -Werror-unused-but-set-*. */
538 static int unused_but_set_errorcount
;
540 /* Exit a binding level.
541 Pop the level off, and restore the state of the identifier-decl mappings
542 that were in effect when this level was entered.
544 If KEEP == 1, this level had explicit declarations, so
545 and create a "block" (a BLOCK node) for the level
546 to record its declarations and subblocks for symbol table output.
548 If FUNCTIONBODY is nonzero, this level is the body of a function,
549 so create a block as if KEEP were set and also clear out all
552 If REVERSE is nonzero, reverse the order of decls before putting
553 them into the BLOCK. */
556 poplevel (int keep
, int reverse
, int functionbody
)
559 /* The chain of decls was accumulated in reverse order.
560 Put it into forward order, just for cleanliness. */
565 int leaving_for_scope
;
568 cp_label_binding
*label_bind
;
570 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
575 gcc_assert (current_binding_level
->kind
!= sk_class
);
577 if (current_binding_level
->kind
== sk_cleanup
)
579 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
581 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
583 /* We used to use KEEP == 2 to indicate that the new block should go
584 at the beginning of the list of blocks at this binding level,
585 rather than the end. This hack is no longer used. */
586 gcc_assert (keep
== 0 || keep
== 1);
588 if (current_binding_level
->keep
)
591 /* Any uses of undefined labels, and any defined labels, now operate
592 under constraints of next binding contour. */
593 if (cfun
&& !functionbody
&& named_labels
)
594 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
595 (current_binding_level
);
597 /* Get the decls in the order they were written.
598 Usually current_binding_level->names is in reverse order.
599 But parameter decls were previously put in forward order. */
602 current_binding_level
->names
603 = decls
= nreverse (current_binding_level
->names
);
605 decls
= current_binding_level
->names
;
607 /* If there were any declarations or structure tags in that level,
608 or if this level is a function body,
609 create a BLOCK to record them for the life of this function. */
611 if (keep
== 1 || functionbody
)
612 block
= make_node (BLOCK
);
613 if (block
!= NULL_TREE
)
615 BLOCK_VARS (block
) = decls
;
616 BLOCK_SUBBLOCKS (block
) = subblocks
;
619 /* In each subblock, record that this is its superior. */
621 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
622 BLOCK_SUPERCONTEXT (link
) = block
;
624 /* We still support the old for-scope rules, whereby the variables
625 in a for-init statement were in scope after the for-statement
626 ended. We only use the new rules if flag_new_for_scope is
629 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
631 /* Before we remove the declarations first check for unused variables. */
632 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
633 && current_binding_level
->kind
!= sk_template_parms
634 && !processing_template_decl
)
635 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
637 /* There are cases where D itself is a TREE_LIST. See in
638 push_local_binding where the list of decls returned by
639 getdecls is built. */
640 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
641 tree type
= TREE_TYPE (decl
);
643 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
644 && ! DECL_IN_SYSTEM_HEADER (decl
)
645 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
646 && type
!= error_mark_node
647 && (!CLASS_TYPE_P (type
)
648 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
649 || lookup_attribute ("warn_unused",
650 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
652 if (! TREE_USED (decl
))
653 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
654 else if (DECL_CONTEXT (decl
) == current_function_decl
655 // For -Wunused-but-set-variable leave references alone.
656 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
657 && errorcount
== unused_but_set_errorcount
)
659 warning (OPT_Wunused_but_set_variable
,
660 "variable %q+D set but not used", decl
);
661 unused_but_set_errorcount
= errorcount
;
666 /* Remove declarations for all the DECLs in this level. */
667 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
669 if (leaving_for_scope
&& VAR_P (link
)
670 /* It's hard to make this ARM compatibility hack play nicely with
671 lambdas, and it really isn't necessary in C++11 mode. */
672 && cxx_dialect
< cxx11
675 tree name
= DECL_NAME (link
);
679 ob
= outer_binding (name
,
680 IDENTIFIER_BINDING (name
),
683 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
685 ns_binding
= NULL_TREE
;
687 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
688 /* We have something like:
693 and we are leaving the `for' scope. There's no reason to
694 keep the binding of the inner `i' in this case. */
695 pop_binding (name
, link
);
696 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
697 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
698 /* Here, we have something like:
706 We must pop the for-scope binding so we know what's a
707 type and what isn't. */
708 pop_binding (name
, link
);
711 /* Mark this VAR_DECL as dead so that we can tell we left it
712 there only for backward compatibility. */
713 DECL_DEAD_FOR_LOCAL (link
) = 1;
715 /* Keep track of what should have happened when we
716 popped the binding. */
719 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
720 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
723 /* Add it to the list of dead variables in the next
724 outermost binding to that we can remove these when we
725 leave that binding. */
727 current_binding_level
->level_chain
->dead_vars_from_for
,
730 /* Although we don't pop the cxx_binding, we do clear
731 its SCOPE since the scope is going away now. */
732 IDENTIFIER_BINDING (name
)->scope
733 = current_binding_level
->level_chain
;
740 /* Remove the binding. */
743 if (TREE_CODE (decl
) == TREE_LIST
)
744 decl
= TREE_VALUE (decl
);
747 if (TREE_CODE (name
) == OVERLOAD
)
748 name
= OVL_FUNCTION (name
);
750 gcc_assert (DECL_P (name
));
751 pop_binding (DECL_NAME (name
), decl
);
755 /* Remove declarations for any `for' variables from inner scopes
756 that we kept around. */
757 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
759 pop_binding (DECL_NAME (decl
), decl
);
761 /* Restore the IDENTIFIER_TYPE_VALUEs. */
762 for (link
= current_binding_level
->type_shadowed
;
763 link
; link
= TREE_CHAIN (link
))
764 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
766 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
767 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
769 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
771 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
772 list if a `using' declaration put them there. The debugging
773 back ends won't understand OVERLOAD, so we remove them here.
774 Because the BLOCK_VARS are (temporarily) shared with
775 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
776 popped all the bindings. */
781 for (d
= &BLOCK_VARS (block
); *d
; )
783 if (TREE_CODE (*d
) == TREE_LIST
)
784 *d
= TREE_CHAIN (*d
);
786 d
= &DECL_CHAIN (*d
);
790 /* If the level being exited is the top level of a function,
791 check over all the labels. */
794 /* Since this is the top level block of a function, the vars are
795 the function's parameters. Don't leave them in the BLOCK
796 because they are found in the FUNCTION_DECL instead. */
797 BLOCK_VARS (block
) = 0;
801 kind
= current_binding_level
->kind
;
802 if (kind
== sk_cleanup
)
806 /* If this is a temporary binding created for a cleanup, then we'll
807 have pushed a statement list level. Pop that, create a new
808 BIND_EXPR for the block, and insert it into the stream. */
809 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
810 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
817 /* The current function is being defined, so its DECL_INITIAL
818 should be error_mark_node. */
819 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
820 DECL_INITIAL (current_function_decl
) = block
;
823 current_binding_level
->blocks
824 = block_chainon (current_binding_level
->blocks
, block
);
826 /* If we did not make a block for the level just exited,
827 any blocks made for inner levels
828 (since they cannot be recorded as subblocks in that level)
829 must be carried forward so they will later become subblocks
830 of something else. */
832 current_binding_level
->blocks
833 = block_chainon (current_binding_level
->blocks
, subblocks
);
835 /* Each and every BLOCK node created here in `poplevel' is important
836 (e.g. for proper debugging information) so if we created one
837 earlier, mark it as "used". */
839 TREE_USED (block
) = 1;
841 /* All temporary bindings created for cleanups are popped silently. */
842 if (kind
== sk_cleanup
)
845 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
849 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
850 itself, calling F for each. The DATA is passed to F as well. */
853 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
856 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
858 result
|= (*f
) (name_space
, data
);
860 for (; current
; current
= DECL_CHAIN (current
))
861 result
|= walk_namespaces_r (current
, f
, data
);
866 /* Walk all the namespaces, calling F for each. The DATA is passed to
870 walk_namespaces (walk_namespaces_fn f
, void* data
)
872 return walk_namespaces_r (global_namespace
, f
, data
);
875 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
876 DATA is non-NULL, this is the last time we will call
877 wrapup_global_declarations for this NAMESPACE. */
880 wrapup_globals_for_namespace (tree name_space
, void* data
)
882 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
883 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
884 tree
*vec
= statics
->address ();
885 int len
= statics
->length ();
886 int last_time
= (data
!= 0);
890 check_global_declarations (vec
, len
);
891 emit_debug_global_declarations (vec
, len
);
895 /* Write out any globals that need to be output. */
896 return wrapup_global_declarations (vec
, len
);
900 /* In C++, you don't have to write `struct S' to refer to `S'; you
901 can just use `S'. We accomplish this by creating a TYPE_DECL as
902 if the user had written `typedef struct S S'. Create and return
903 the TYPE_DECL for TYPE. */
906 create_implicit_typedef (tree name
, tree type
)
910 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
911 DECL_ARTIFICIAL (decl
) = 1;
912 /* There are other implicit type declarations, like the one *within*
913 a class that allows you to write `S::S'. We must distinguish
915 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
916 TYPE_NAME (type
) = decl
;
917 TYPE_STUB_DECL (type
) = decl
;
922 /* Remember a local name for name-mangling purposes. */
925 push_local_name (tree decl
)
930 timevar_start (TV_NAME_LOOKUP
);
932 name
= DECL_NAME (decl
);
934 nelts
= vec_safe_length (local_names
);
935 for (i
= 0; i
< nelts
; i
++)
937 t
= (*local_names
)[i
];
938 if (DECL_NAME (t
) == name
)
940 if (!DECL_LANG_SPECIFIC (decl
))
941 retrofit_lang_decl (decl
);
942 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
943 if (DECL_DISCRIMINATOR_SET_P (t
))
944 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
946 DECL_DISCRIMINATOR (decl
) = 1;
948 (*local_names
)[i
] = decl
;
949 timevar_stop (TV_NAME_LOOKUP
);
954 vec_safe_push (local_names
, decl
);
955 timevar_stop (TV_NAME_LOOKUP
);
958 /* Subroutine of duplicate_decls: return truthvalue of whether
959 or not types of these decls match.
961 For C++, we must compare the parameter list so that `int' can match
962 `int&' in a parameter position, but `int&' is not confused with
966 decls_match (tree newdecl
, tree olddecl
)
970 if (newdecl
== olddecl
)
973 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
974 /* If the two DECLs are not even the same kind of thing, we're not
975 interested in their types. */
978 gcc_assert (DECL_P (newdecl
));
980 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
982 tree f1
= TREE_TYPE (newdecl
);
983 tree f2
= TREE_TYPE (olddecl
);
984 tree p1
= TYPE_ARG_TYPES (f1
);
985 tree p2
= TYPE_ARG_TYPES (f2
);
988 /* Specializations of different templates are different functions
989 even if they have the same type. */
990 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
991 ? DECL_TI_TEMPLATE (newdecl
)
993 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
994 ? DECL_TI_TEMPLATE (olddecl
)
999 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1000 && ! (DECL_EXTERN_C_P (newdecl
)
1001 && DECL_EXTERN_C_P (olddecl
)))
1004 /* A new declaration doesn't match a built-in one unless it
1005 is also extern "C". */
1006 if (DECL_IS_BUILTIN (olddecl
)
1007 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1010 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1013 /* A declaration with deduced return type should use its pre-deduction
1014 type for declaration matching. */
1015 r2
= fndecl_declared_return_type (olddecl
);
1017 if (same_type_p (TREE_TYPE (f1
), r2
))
1019 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1020 && (DECL_BUILT_IN (olddecl
)
1021 #ifndef NO_IMPLICIT_EXTERN_C
1022 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1023 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1027 types_match
= self_promoting_args_p (p1
);
1028 if (p1
== void_list_node
)
1029 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1031 #ifndef NO_IMPLICIT_EXTERN_C
1032 else if (!prototype_p (f1
)
1033 && (DECL_EXTERN_C_P (olddecl
)
1034 && DECL_IN_SYSTEM_HEADER (olddecl
)
1035 && !DECL_CLASS_SCOPE_P (olddecl
))
1036 && (DECL_EXTERN_C_P (newdecl
)
1037 && DECL_IN_SYSTEM_HEADER (newdecl
)
1038 && !DECL_CLASS_SCOPE_P (newdecl
)))
1040 types_match
= self_promoting_args_p (p2
);
1041 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1047 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1048 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1049 || comp_type_attributes (TREE_TYPE (newdecl
),
1050 TREE_TYPE (olddecl
)) != 0);
1055 /* The decls dont match if they correspond to two different versions
1056 of the same function. Disallow extern "C" functions to be
1057 versions for now. */
1059 && !DECL_EXTERN_C_P (newdecl
)
1060 && !DECL_EXTERN_C_P (olddecl
)
1061 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1063 /* Mark functions as versions if necessary. Modify the mangled decl
1064 name if necessary. */
1065 if (DECL_FUNCTION_VERSIONED (newdecl
)
1066 && DECL_FUNCTION_VERSIONED (olddecl
))
1068 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1070 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1071 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1072 mangle_decl (newdecl
);
1074 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1076 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1077 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1078 mangle_decl (olddecl
);
1080 cgraph_node::record_function_versions (olddecl
, newdecl
);
1084 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1086 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1087 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1090 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1091 DECL_TEMPLATE_PARMS (olddecl
)))
1094 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1095 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1096 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1098 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1099 DECL_TEMPLATE_RESULT (newdecl
));
1103 /* Need to check scope for variable declaration (VAR_DECL).
1104 For typedef (TYPE_DECL), scope is ignored. */
1106 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1108 Two declarations for an object with C language linkage
1109 with the same name (ignoring the namespace that qualify
1110 it) that appear in different namespace scopes refer to
1112 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1115 if (TREE_TYPE (newdecl
) == error_mark_node
)
1116 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1117 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1118 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1119 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1122 types_match
= comptypes (TREE_TYPE (newdecl
),
1123 TREE_TYPE (olddecl
),
1124 COMPARE_REDECLARATION
);
1130 /* If NEWDECL is `static' and an `extern' was seen previously,
1131 warn about it. OLDDECL is the previous declaration.
1133 Note that this does not apply to the C++ case of declaring
1134 a variable `extern const' and then later `const'.
1136 Don't complain about built-in functions, since they are beyond
1137 the user's control. */
1140 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1142 if (TREE_CODE (newdecl
) == TYPE_DECL
1143 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1144 || TREE_CODE (newdecl
) == CONST_DECL
1145 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1148 /* Don't get confused by static member functions; that's a different
1150 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1151 && DECL_STATIC_FUNCTION_P (newdecl
))
1154 /* If the old declaration was `static', or the new one isn't, then
1155 everything is OK. */
1156 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1159 /* It's OK to declare a builtin function as `static'. */
1160 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1161 && DECL_ARTIFICIAL (olddecl
))
1164 if (permerror (input_location
,
1165 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1166 inform (input_location
, "previous declaration of %q+D", olddecl
);
1169 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1170 function templates. If their exception specifications do not
1171 match, issue a diagnostic. */
1174 check_redeclaration_exception_specification (tree new_decl
,
1177 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1178 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1180 /* Two default specs are equivalent, don't force evaluation. */
1181 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1182 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1185 maybe_instantiate_noexcept (new_decl
);
1186 maybe_instantiate_noexcept (old_decl
);
1187 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1188 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1192 If any declaration of a function has an exception-specification,
1193 all declarations, including the definition and an explicit
1194 specialization, of that function shall have an
1195 exception-specification with the same set of type-ids. */
1196 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1197 && ! DECL_IS_BUILTIN (old_decl
)
1199 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1201 error ("declaration of %qF has a different exception specifier",
1203 error ("from previous declaration %q+F", old_decl
);
1207 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1208 Otherwise issue diagnostics. */
1211 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1213 old_decl
= STRIP_TEMPLATE (old_decl
);
1214 new_decl
= STRIP_TEMPLATE (new_decl
);
1215 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1216 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1218 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1219 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1221 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1223 if (DECL_BUILT_IN (old_decl
))
1225 /* Hide a built-in declaration. */
1226 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1227 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1230 /* 7.1.5 [dcl.constexpr]
1231 Note: An explicit specialization can differ from the template
1232 declaration with respect to the constexpr specifier. */
1233 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1234 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1237 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1238 error ("from previous declaration %q+D", old_decl
);
1244 /* DECL is a redeclaration of a function or function template. If
1245 it does have default arguments issue a diagnostic. Note: this
1246 function is used to enforce the requirements in C++11 8.3.6 about
1247 no default arguments in redeclarations. */
1250 check_redeclaration_no_default_args (tree decl
)
1252 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1254 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1255 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1256 if (TREE_PURPOSE (t
))
1258 permerror (input_location
,
1259 "redeclaration of %q#D may not have default "
1265 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1266 && lookup_attribute ("gnu_inline", \
1267 DECL_ATTRIBUTES (fn)))
1269 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1270 If the redeclaration is invalid, a diagnostic is issued, and the
1271 error_mark_node is returned. Otherwise, OLDDECL is returned.
1273 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1276 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1279 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1281 unsigned olddecl_uid
= DECL_UID (olddecl
);
1282 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1283 int new_defines_function
= 0;
1284 tree new_template_info
;
1286 if (newdecl
== olddecl
)
1289 types_match
= decls_match (newdecl
, olddecl
);
1291 /* If either the type of the new decl or the type of the old decl is an
1292 error_mark_node, then that implies that we have already issued an
1293 error (earlier) for some bogus type specification, and in that case,
1294 it is rather pointless to harass the user with yet more error message
1295 about the same declaration, so just pretend the types match here. */
1296 if (TREE_TYPE (newdecl
) == error_mark_node
1297 || TREE_TYPE (olddecl
) == error_mark_node
)
1298 return error_mark_node
;
1300 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1301 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1303 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1304 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1305 && check_raw_literal_operator (olddecl
))
1306 error ("literal operator template %q+D conflicts with"
1307 " raw literal operator %qD", newdecl
, olddecl
);
1308 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1309 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1310 && check_raw_literal_operator (newdecl
))
1311 error ("raw literal operator %q+D conflicts with"
1312 " literal operator template %qD", newdecl
, olddecl
);
1315 if (DECL_P (olddecl
)
1316 && TREE_CODE (newdecl
) == FUNCTION_DECL
1317 && TREE_CODE (olddecl
) == FUNCTION_DECL
1318 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1320 if (DECL_DECLARED_INLINE_P (newdecl
)
1321 && DECL_UNINLINABLE (newdecl
)
1322 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1323 /* Already warned elsewhere. */;
1324 else if (DECL_DECLARED_INLINE_P (olddecl
)
1325 && DECL_UNINLINABLE (olddecl
)
1326 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1327 /* Already warned. */;
1328 else if (DECL_DECLARED_INLINE_P (newdecl
)
1329 && DECL_UNINLINABLE (olddecl
)
1330 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1332 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1334 inform (DECL_SOURCE_LOCATION (olddecl
),
1335 "previous declaration of %qD with attribute noinline",
1338 else if (DECL_DECLARED_INLINE_P (olddecl
)
1339 && DECL_UNINLINABLE (newdecl
)
1340 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1342 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1343 "attribute noinline", newdecl
))
1344 inform (DECL_SOURCE_LOCATION (olddecl
),
1345 "previous declaration of %qD was inline",
1350 /* Check for redeclaration and other discrepancies. */
1351 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1352 && DECL_ARTIFICIAL (olddecl
))
1354 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1355 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1357 /* Avoid warnings redeclaring built-ins which have not been
1358 explicitly declared. */
1359 if (DECL_ANTICIPATED (olddecl
))
1362 /* If you declare a built-in or predefined function name as static,
1363 the old definition is overridden, but optionally warn this was a
1364 bad choice of name. */
1365 if (! TREE_PUBLIC (newdecl
))
1367 warning (OPT_Wshadow
,
1368 DECL_BUILT_IN (olddecl
)
1369 ? G_("shadowing built-in function %q#D")
1370 : G_("shadowing library function %q#D"), olddecl
);
1371 /* Discard the old built-in function. */
1374 /* If the built-in is not ansi, then programs can override
1375 it even globally without an error. */
1376 else if (! DECL_BUILT_IN (olddecl
))
1377 warning (0, "library function %q#D redeclared as non-function %q#D",
1380 error ("declaration of %q#D conflicts with built-in "
1381 "declaration %q#D", newdecl
, olddecl
);
1384 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1386 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1387 error_at (DECL_SOURCE_LOCATION (newdecl
),
1388 "redeclaration of %<pragma omp declare reduction%>");
1389 inform (DECL_SOURCE_LOCATION (olddecl
),
1390 "previous %<pragma omp declare reduction%> declaration");
1391 return error_mark_node
;
1393 else if (!types_match
)
1395 /* Avoid warnings redeclaring built-ins which have not been
1396 explicitly declared. */
1397 if (DECL_ANTICIPATED (olddecl
))
1399 /* Deal with fileptr_type_node. FILE type is not known
1400 at the time we create the builtins. */
1403 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1404 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1406 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1409 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1411 tree t
= TREE_VALUE (t1
);
1414 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1415 == get_identifier ("FILE")
1416 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1418 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1420 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1421 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1422 types_match
= decls_match (newdecl
, olddecl
);
1424 return duplicate_decls (newdecl
, olddecl
,
1426 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1429 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1432 else if ((DECL_EXTERN_C_P (newdecl
)
1433 && DECL_EXTERN_C_P (olddecl
))
1434 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1435 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1437 /* A near match; override the builtin. */
1439 if (TREE_PUBLIC (newdecl
))
1440 warning (0, "new declaration %q#D ambiguates built-in "
1441 "declaration %q#D", newdecl
, olddecl
);
1443 warning (OPT_Wshadow
,
1444 DECL_BUILT_IN (olddecl
)
1445 ? G_("shadowing built-in function %q#D")
1446 : G_("shadowing library function %q#D"), olddecl
);
1449 /* Discard the old built-in function. */
1452 /* Replace the old RTL to avoid problems with inlining. */
1453 COPY_DECL_RTL (newdecl
, olddecl
);
1455 /* Even if the types match, prefer the new declarations type for
1456 built-ins which have not been explicitly declared, for
1457 exception lists, etc... */
1458 else if (DECL_IS_BUILTIN (olddecl
))
1460 tree type
= TREE_TYPE (newdecl
);
1461 tree attribs
= (*targetm
.merge_type_attributes
)
1462 (TREE_TYPE (olddecl
), type
);
1464 type
= cp_build_type_attribute_variant (type
, attribs
);
1465 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1468 /* If a function is explicitly declared "throw ()", propagate that to
1469 the corresponding builtin. */
1470 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1471 && DECL_ANTICIPATED (olddecl
)
1472 && TREE_NOTHROW (newdecl
)
1473 && !TREE_NOTHROW (olddecl
))
1475 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1476 tree tmpdecl
= builtin_decl_explicit (fncode
);
1477 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1478 TREE_NOTHROW (tmpdecl
) = 1;
1481 /* Whether or not the builtin can throw exceptions has no
1482 bearing on this declarator. */
1483 TREE_NOTHROW (olddecl
) = 0;
1485 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1487 /* If a builtin function is redeclared as `static', merge
1488 the declarations, but make the original one static. */
1489 DECL_THIS_STATIC (olddecl
) = 1;
1490 TREE_PUBLIC (olddecl
) = 0;
1492 /* Make the old declaration consistent with the new one so
1493 that all remnants of the builtin-ness of this function
1494 will be banished. */
1495 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1496 COPY_DECL_RTL (newdecl
, olddecl
);
1499 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1501 /* C++ Standard, 3.3, clause 4:
1502 "[Note: a namespace name or a class template name must be unique
1503 in its declarative region (7.3.2, clause 14). ]" */
1504 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1505 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1506 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1507 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1508 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1509 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1511 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1512 && TREE_CODE (newdecl
) != TYPE_DECL
)
1513 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1514 && TREE_CODE (olddecl
) != TYPE_DECL
))
1516 /* We do nothing special here, because C++ does such nasty
1517 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1518 get shadowed, and know that if we need to find a TYPE_DECL
1519 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1520 slot of the identifier. */
1524 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1525 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1526 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1527 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1531 error ("%q#D redeclared as different kind of symbol", newdecl
);
1532 if (TREE_CODE (olddecl
) == TREE_LIST
)
1533 olddecl
= TREE_VALUE (olddecl
);
1534 inform (DECL_SOURCE_LOCATION (olddecl
),
1535 "previous declaration %q#D", olddecl
);
1537 return error_mark_node
;
1539 else if (!types_match
)
1541 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1542 /* These are certainly not duplicate declarations; they're
1543 from different scopes. */
1546 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1548 /* The name of a class template may not be declared to refer to
1549 any other template, class, function, object, namespace, value,
1550 or type in the same scope. */
1551 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1552 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1554 error ("conflicting declaration of template %q#D", newdecl
);
1555 inform (DECL_SOURCE_LOCATION (olddecl
),
1556 "previous declaration %q#D", olddecl
);
1557 return error_mark_node
;
1559 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1560 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1561 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1562 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1563 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1564 DECL_TEMPLATE_PARMS (olddecl
))
1565 /* Template functions can be disambiguated by
1567 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1568 TREE_TYPE (TREE_TYPE (olddecl
))))
1570 error ("ambiguating new declaration %q#D", newdecl
);
1571 inform (DECL_SOURCE_LOCATION (olddecl
),
1572 "old declaration %q#D", olddecl
);
1576 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1578 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1580 error ("conflicting declaration of C function %q#D",
1582 inform (DECL_SOURCE_LOCATION (olddecl
),
1583 "previous declaration %q#D", olddecl
);
1586 /* For function versions, params and types match, but they
1587 are not ambiguous. */
1588 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1589 && !DECL_FUNCTION_VERSIONED (olddecl
))
1590 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1591 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1593 error ("ambiguating new declaration of %q#D", newdecl
);
1594 inform (DECL_SOURCE_LOCATION (olddecl
),
1595 "old declaration %q#D", olddecl
);
1596 return error_mark_node
;
1603 error ("conflicting declaration %q#D", newdecl
);
1604 inform (DECL_SOURCE_LOCATION (olddecl
),
1605 "previous declaration as %q#D", olddecl
);
1606 return error_mark_node
;
1609 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1610 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1611 && (!DECL_TEMPLATE_INFO (newdecl
)
1612 || (DECL_TI_TEMPLATE (newdecl
)
1613 != DECL_TI_TEMPLATE (olddecl
))))
1614 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1615 && (!DECL_TEMPLATE_INFO (olddecl
)
1616 || (DECL_TI_TEMPLATE (olddecl
)
1617 != DECL_TI_TEMPLATE (newdecl
))))))
1618 /* It's OK to have a template specialization and a non-template
1619 with the same type, or to have specializations of two
1620 different templates with the same type. Note that if one is a
1621 specialization, and the other is an instantiation of the same
1622 template, that we do not exit at this point. That situation
1623 can occur if we instantiate a template class, and then
1624 specialize one of its methods. This situation is valid, but
1625 the declarations must be merged in the usual way. */
1627 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1628 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1629 && !DECL_USE_TEMPLATE (newdecl
))
1630 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1631 && !DECL_USE_TEMPLATE (olddecl
))))
1632 /* One of the declarations is a template instantiation, and the
1633 other is not a template at all. That's OK. */
1635 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1637 /* In [namespace.alias] we have:
1639 In a declarative region, a namespace-alias-definition can be
1640 used to redefine a namespace-alias declared in that declarative
1641 region to refer only to the namespace to which it already
1644 Therefore, if we encounter a second alias directive for the same
1645 alias, we can just ignore the second directive. */
1646 if (DECL_NAMESPACE_ALIAS (newdecl
)
1647 && (DECL_NAMESPACE_ALIAS (newdecl
)
1648 == DECL_NAMESPACE_ALIAS (olddecl
)))
1650 /* [namespace.alias]
1652 A namespace-name or namespace-alias shall not be declared as
1653 the name of any other entity in the same declarative region.
1654 A namespace-name defined at global scope shall not be
1655 declared as the name of any other entity in any global scope
1657 error ("conflicting declaration of namespace %qD", newdecl
);
1658 inform (DECL_SOURCE_LOCATION (olddecl
),
1659 "previous declaration of namespace %qD here", olddecl
);
1660 return error_mark_node
;
1664 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1667 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1668 if (DECL_NAME (olddecl
) != NULL_TREE
)
1669 inform (input_location
,
1670 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1671 ? G_("%q+#D previously defined here")
1672 : G_("%q+#D previously declared here"), olddecl
);
1673 return error_mark_node
;
1675 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1676 && DECL_INITIAL (olddecl
) != NULL_TREE
1677 && !prototype_p (TREE_TYPE (olddecl
))
1678 && prototype_p (TREE_TYPE (newdecl
)))
1680 /* Prototype decl follows defn w/o prototype. */
1681 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1682 "prototype specified for %q#D", newdecl
))
1683 inform (DECL_SOURCE_LOCATION (olddecl
),
1684 "previous non-prototype definition here");
1686 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1687 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1690 If two declarations of the same function or object
1691 specify different linkage-specifications ..., the program
1692 is ill-formed.... Except for functions with C++ linkage,
1693 a function declaration without a linkage specification
1694 shall not precede the first linkage specification for
1695 that function. A function can be declared without a
1696 linkage specification after an explicit linkage
1697 specification has been seen; the linkage explicitly
1698 specified in the earlier declaration is not affected by
1699 such a function declaration.
1701 DR 563 raises the question why the restrictions on
1702 functions should not also apply to objects. Older
1703 versions of G++ silently ignore the linkage-specification
1711 which is clearly wrong. Therefore, we now treat objects
1713 if (current_lang_depth () == 0)
1715 /* There is no explicit linkage-specification, so we use
1716 the linkage from the previous declaration. */
1717 if (!DECL_LANG_SPECIFIC (newdecl
))
1718 retrofit_lang_decl (newdecl
);
1719 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1723 error ("conflicting declaration of %q#D with %qL linkage",
1724 newdecl
, DECL_LANGUAGE (newdecl
));
1725 inform (DECL_SOURCE_LOCATION (olddecl
),
1726 "previous declaration with %qL linkage",
1727 DECL_LANGUAGE (olddecl
));
1731 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1733 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1735 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1736 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1737 && (/* grokfndecl passes member function templates too
1738 as FUNCTION_DECLs. */
1739 DECL_TEMPLATE_INFO (olddecl
)
1741 Default arguments for a member function of a class
1742 template shall be specified on the initial declaration
1743 of the member function within the class template. */
1744 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1745 check_redeclaration_no_default_args (newdecl
);
1748 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1749 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1752 for (; t1
&& t1
!= void_list_node
;
1753 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1754 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1756 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1759 if (permerror (input_location
,
1760 "default argument given for parameter "
1761 "%d of %q#D", i
, newdecl
))
1762 inform (DECL_SOURCE_LOCATION (olddecl
),
1763 "previous specification in %q#D here",
1768 error ("default argument given for parameter %d "
1769 "of %q#D", i
, newdecl
);
1770 inform (DECL_SOURCE_LOCATION (olddecl
),
1771 "previous specification in %q#D here",
1779 /* Do not merge an implicit typedef with an explicit one. In:
1783 typedef class A A __attribute__ ((foo));
1785 the attribute should apply only to the typedef. */
1786 if (TREE_CODE (olddecl
) == TYPE_DECL
1787 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1788 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1791 /* If new decl is `static' and an `extern' was seen previously,
1793 warn_extern_redeclared_static (newdecl
, olddecl
);
1795 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1796 return error_mark_node
;
1798 /* We have committed to returning 1 at this point. */
1799 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1801 /* Now that functions must hold information normally held
1802 by field decls, there is extra work to do so that
1803 declaration information does not get destroyed during
1805 if (DECL_VINDEX (olddecl
))
1806 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1807 if (DECL_CONTEXT (olddecl
))
1808 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1809 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1810 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1811 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1812 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1813 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1814 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1815 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1816 SET_OVERLOADED_OPERATOR_CODE
1817 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1818 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1820 /* Optionally warn about more than one declaration for the same
1821 name, but don't warn about a function declaration followed by a
1823 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1824 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1825 /* Don't warn about extern decl followed by definition. */
1826 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1827 /* Don't warn about friends, let add_friend take care of it. */
1828 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1829 /* Don't warn about declaration followed by specialization. */
1830 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1831 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1833 if (warning (OPT_Wredundant_decls
,
1834 "redundant redeclaration of %qD in same scope",
1836 inform (DECL_SOURCE_LOCATION (olddecl
),
1837 "previous declaration of %qD", olddecl
);
1840 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1841 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1843 if (DECL_DELETED_FN (newdecl
))
1845 error ("deleted definition of %qD", newdecl
);
1846 inform (DECL_SOURCE_LOCATION (olddecl
),
1847 "previous declaration of %qD", olddecl
);
1849 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1853 /* Deal with C++: must preserve virtual function table size. */
1854 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1856 tree newtype
= TREE_TYPE (newdecl
);
1857 tree oldtype
= TREE_TYPE (olddecl
);
1859 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1860 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1861 CLASSTYPE_FRIEND_CLASSES (newtype
)
1862 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1864 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1867 /* Copy all the DECL_... slots specified in the new decl
1868 except for any that we copy here from the old type. */
1869 DECL_ATTRIBUTES (newdecl
)
1870 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1872 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1876 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1877 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1878 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1879 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1880 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1881 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1883 DECL_ATTRIBUTES (old_result
)
1884 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1886 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1888 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1889 declarations of a function template. */
1890 check_redeclaration_no_default_args (newdecl
);
1892 check_default_args (newdecl
);
1894 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1895 && DECL_INITIAL (new_result
))
1897 if (DECL_INITIAL (old_result
))
1898 DECL_UNINLINABLE (old_result
) = 1;
1900 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1901 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1902 DECL_NOT_REALLY_EXTERN (old_result
)
1903 = DECL_NOT_REALLY_EXTERN (new_result
);
1904 DECL_INTERFACE_KNOWN (old_result
)
1905 = DECL_INTERFACE_KNOWN (new_result
);
1906 DECL_DECLARED_INLINE_P (old_result
)
1907 = DECL_DECLARED_INLINE_P (new_result
);
1908 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1909 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1914 DECL_DECLARED_INLINE_P (old_result
)
1915 |= DECL_DECLARED_INLINE_P (new_result
);
1916 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1917 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1918 check_redeclaration_exception_specification (newdecl
, olddecl
);
1922 /* If the new declaration is a definition, update the file and
1923 line information on the declaration, and also make
1924 the old declaration the same definition. */
1925 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1927 DECL_SOURCE_LOCATION (olddecl
)
1928 = DECL_SOURCE_LOCATION (old_result
)
1929 = DECL_SOURCE_LOCATION (newdecl
);
1930 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1931 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1934 DECL_ARGUMENTS (old_result
)
1935 = DECL_ARGUMENTS (new_result
);
1936 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1937 parm
= DECL_CHAIN (parm
))
1938 DECL_CONTEXT (parm
) = old_result
;
1947 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1948 check_redeclaration_exception_specification (newdecl
, olddecl
);
1950 /* Automatically handles default parameters. */
1951 tree oldtype
= TREE_TYPE (olddecl
);
1954 /* For typedefs use the old type, as the new type's DECL_NAME points
1955 at newdecl, which will be ggc_freed. */
1956 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1959 /* Merge the data types specified in the two decls. */
1960 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1962 if (VAR_P (newdecl
))
1964 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1965 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1966 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1967 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1968 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1969 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1971 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1972 if (DECL_LANG_SPECIFIC (olddecl
)
1973 && CP_DECL_THREADPRIVATE_P (olddecl
))
1975 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1976 if (!DECL_LANG_SPECIFIC (newdecl
))
1977 retrofit_lang_decl (newdecl
);
1979 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1983 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1985 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1986 check_default_args (newdecl
);
1988 /* Lay the type out, unless already done. */
1989 if (! same_type_p (newtype
, oldtype
)
1990 && TREE_TYPE (newdecl
) != error_mark_node
1991 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1992 layout_type (TREE_TYPE (newdecl
));
1994 if ((VAR_P (newdecl
)
1995 || TREE_CODE (newdecl
) == PARM_DECL
1996 || TREE_CODE (newdecl
) == RESULT_DECL
1997 || TREE_CODE (newdecl
) == FIELD_DECL
1998 || TREE_CODE (newdecl
) == TYPE_DECL
)
1999 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2000 layout_decl (newdecl
, 0);
2002 /* Merge the type qualifiers. */
2003 if (TREE_READONLY (newdecl
))
2004 TREE_READONLY (olddecl
) = 1;
2005 if (TREE_THIS_VOLATILE (newdecl
))
2006 TREE_THIS_VOLATILE (olddecl
) = 1;
2007 if (TREE_NOTHROW (newdecl
))
2008 TREE_NOTHROW (olddecl
) = 1;
2010 /* Merge deprecatedness. */
2011 if (TREE_DEPRECATED (newdecl
))
2012 TREE_DEPRECATED (olddecl
) = 1;
2014 /* Preserve function specific target and optimization options */
2015 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2017 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2018 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2019 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2020 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2022 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2023 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2024 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2025 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2028 /* Merge the initialization information. */
2029 if (DECL_INITIAL (newdecl
) == NULL_TREE
2030 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2032 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2033 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2034 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2036 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2037 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2041 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2043 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2044 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2045 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2046 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2047 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2048 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2049 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2050 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2051 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2052 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2053 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2054 /* Keep the old RTL. */
2055 COPY_DECL_RTL (olddecl
, newdecl
);
2057 else if (VAR_P (newdecl
)
2058 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2060 /* Keep the old RTL. We cannot keep the old RTL if the old
2061 declaration was for an incomplete object and the new
2062 declaration is not since many attributes of the RTL will
2064 COPY_DECL_RTL (olddecl
, newdecl
);
2067 /* If cannot merge, then use the new type and qualifiers,
2068 and don't preserve the old rtl. */
2071 /* Clean out any memory we had of the old declaration. */
2072 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2074 TREE_VALUE (oldstatic
) = error_mark_node
;
2076 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2077 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2078 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2079 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2082 /* Merge the storage class information. */
2083 merge_weak (newdecl
, olddecl
);
2085 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2086 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2087 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2088 if (! DECL_EXTERNAL (olddecl
))
2089 DECL_EXTERNAL (newdecl
) = 0;
2091 new_template_info
= NULL_TREE
;
2092 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2094 bool new_redefines_gnu_inline
= false;
2096 if (new_defines_function
2097 && ((DECL_INTERFACE_KNOWN (olddecl
)
2098 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2099 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2100 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2101 == FUNCTION_DECL
))))
2105 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2106 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2108 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2111 if (!new_redefines_gnu_inline
)
2113 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2114 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2115 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2117 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2118 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2119 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2121 /* If the OLDDECL is an instantiation and/or specialization,
2122 then the NEWDECL must be too. But, it may not yet be marked
2123 as such if the caller has created NEWDECL, but has not yet
2124 figured out that it is a redeclaration. */
2125 if (!DECL_USE_TEMPLATE (newdecl
))
2126 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2128 /* Don't really know how much of the language-specific
2129 values we should copy from old to new. */
2130 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2131 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2132 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2133 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2135 if (LANG_DECL_HAS_MIN (newdecl
))
2137 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2138 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2139 if (DECL_TEMPLATE_INFO (newdecl
))
2141 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2142 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2143 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2144 /* Remember the presence of explicit specialization args. */
2145 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2146 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2148 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2150 /* Only functions have these fields. */
2151 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2153 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2154 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2155 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2156 && DECL_HIDDEN_FRIEND_P (olddecl
)
2157 && newdecl_is_friend
);
2158 DECL_BEFRIENDING_CLASSES (newdecl
)
2159 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2160 DECL_BEFRIENDING_CLASSES (olddecl
));
2161 /* DECL_THUNKS is only valid for virtual functions,
2162 otherwise it is a DECL_FRIEND_CONTEXT. */
2163 if (DECL_VIRTUAL_P (newdecl
))
2164 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2166 /* Only variables have this field. */
2167 else if (VAR_P (newdecl
)
2168 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2169 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2172 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2176 /* Merge parameter attributes. */
2177 tree oldarg
, newarg
;
2178 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2179 newarg
= DECL_ARGUMENTS(newdecl
);
2181 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2182 DECL_ATTRIBUTES (newarg
)
2183 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2184 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2187 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2188 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2190 /* If newdecl is not a specialization, then it is not a
2191 template-related function at all. And that means that we
2192 should have exited above, returning 0. */
2193 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2195 if (DECL_ODR_USED (olddecl
))
2196 /* From [temp.expl.spec]:
2198 If a template, a member template or the member of a class
2199 template is explicitly specialized then that
2200 specialization shall be declared before the first use of
2201 that specialization that would cause an implicit
2202 instantiation to take place, in every translation unit in
2203 which such a use occurs. */
2204 error ("explicit specialization of %qD after first use",
2207 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2208 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2209 && DECL_DECLARED_INLINE_P (newdecl
));
2211 /* Don't propagate visibility from the template to the
2212 specialization here. We'll do that in determine_visibility if
2214 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2216 /* [temp.expl.spec/14] We don't inline explicit specialization
2217 just because the primary template says so. */
2219 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2220 the always_inline attribute. */
2221 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2222 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2224 if (DECL_DECLARED_INLINE_P (newdecl
))
2225 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2227 DECL_ATTRIBUTES (newdecl
)
2228 = remove_attribute ("always_inline",
2229 DECL_ATTRIBUTES (newdecl
));
2232 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2234 /* Never inline re-defined extern inline functions.
2235 FIXME: this could be better handled by keeping both
2236 function as separate declarations. */
2237 DECL_UNINLINABLE (newdecl
) = 1;
2241 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2242 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2244 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2246 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2247 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2249 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2250 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2251 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2252 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2255 /* Preserve abstractness on cloned [cd]tors. */
2256 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2258 /* Update newdecl's parms to point at olddecl. */
2259 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2260 parm
= DECL_CHAIN (parm
))
2261 DECL_CONTEXT (parm
) = olddecl
;
2265 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2266 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2267 COPY_DECL_RTL (newdecl
, olddecl
);
2269 if (! types_match
|| new_defines_function
)
2271 /* These need to be copied so that the names are available.
2272 Note that if the types do match, we'll preserve inline
2273 info and other bits, but if not, we won't. */
2274 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2275 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2277 /* If redeclaring a builtin function, it stays built in
2278 if newdecl is a gnu_inline definition, or if newdecl is just
2280 if (DECL_BUILT_IN (olddecl
)
2281 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2283 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2284 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2285 /* If we're keeping the built-in definition, keep the rtl,
2286 regardless of declaration matches. */
2287 COPY_DECL_RTL (olddecl
, newdecl
);
2288 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2290 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2293 /* If a compatible prototype of these builtin functions
2294 is seen, assume the runtime implements it with the
2295 expected semantics. */
2296 case BUILT_IN_STPCPY
:
2297 if (builtin_decl_explicit_p (fncode
))
2298 set_builtin_decl_implicit_p (fncode
, true);
2305 if (new_defines_function
)
2306 /* If defining a function declared with other language
2307 linkage, use the previously declared language linkage. */
2308 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2309 else if (types_match
)
2311 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2312 /* Don't clear out the arguments if we're just redeclaring a
2314 if (DECL_ARGUMENTS (olddecl
))
2315 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2318 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2319 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2321 /* Now preserve various other info from the definition. */
2322 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2323 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2324 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2325 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2327 /* Warn about conflicting visibility specifications. */
2328 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2329 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2330 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2332 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2333 "%qD: visibility attribute ignored because it "
2334 "conflicts with previous declaration", newdecl
))
2335 inform (DECL_SOURCE_LOCATION (olddecl
),
2336 "previous declaration of %qD", olddecl
);
2338 /* Choose the declaration which specified visibility. */
2339 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2341 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2342 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2344 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2345 so keep this behavior. */
2346 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2348 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2349 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2351 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2352 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2354 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2355 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2357 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2358 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2359 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2361 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2362 with that from NEWDECL below. */
2363 if (DECL_LANG_SPECIFIC (olddecl
))
2365 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2366 != DECL_LANG_SPECIFIC (newdecl
));
2367 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2370 /* Merge the USED information. */
2371 if (TREE_USED (olddecl
))
2372 TREE_USED (newdecl
) = 1;
2373 else if (TREE_USED (newdecl
))
2374 TREE_USED (olddecl
) = 1;
2375 if (VAR_P (newdecl
))
2377 if (DECL_READ_P (olddecl
))
2378 DECL_READ_P (newdecl
) = 1;
2379 else if (DECL_READ_P (newdecl
))
2380 DECL_READ_P (olddecl
) = 1;
2382 if (DECL_PRESERVE_P (olddecl
))
2383 DECL_PRESERVE_P (newdecl
) = 1;
2384 else if (DECL_PRESERVE_P (newdecl
))
2385 DECL_PRESERVE_P (olddecl
) = 1;
2387 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2388 to olddecl and deleted. */
2389 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2390 && DECL_FUNCTION_VERSIONED (olddecl
))
2392 /* Set the flag for newdecl so that it gets copied to olddecl. */
2393 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2394 /* newdecl will be purged after copying to olddecl and is no longer
2396 cgraph_node::delete_function_version (newdecl
);
2399 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2402 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2404 function_size
= sizeof (struct tree_decl_common
);
2406 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2407 (char *) newdecl
+ sizeof (struct tree_common
),
2408 function_size
- sizeof (struct tree_common
));
2410 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2411 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2412 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2414 /* Preserve symtab node mapping. */
2415 olddecl
->decl_with_vis
.symtab_node
= snode
;
2417 if (new_template_info
)
2418 /* If newdecl is a template instantiation, it is possible that
2419 the following sequence of events has occurred:
2421 o A friend function was declared in a class template. The
2422 class template was instantiated.
2424 o The instantiation of the friend declaration was
2425 recorded on the instantiation list, and is newdecl.
2427 o Later, however, instantiate_class_template called pushdecl
2428 on the newdecl to perform name injection. But, pushdecl in
2429 turn called duplicate_decls when it discovered that another
2430 declaration of a global function with the same name already
2433 o Here, in duplicate_decls, we decided to clobber newdecl.
2435 If we're going to do that, we'd better make sure that
2436 olddecl, and not newdecl, is on the list of
2437 instantiations so that if we try to do the instantiation
2438 again we won't get the clobbered declaration. */
2439 reregister_specialization (newdecl
,
2445 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2447 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2448 (char *) newdecl
+ sizeof (struct tree_common
),
2449 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2450 switch (TREE_CODE (newdecl
))
2460 struct symtab_node
*snode
= NULL
;
2462 if (TREE_CODE (newdecl
) == VAR_DECL
2463 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2464 snode
= symtab_node::get (olddecl
);
2465 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2466 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2467 size
- sizeof (struct tree_decl_common
)
2468 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2469 if (TREE_CODE (newdecl
) == VAR_DECL
)
2470 olddecl
->decl_with_vis
.symtab_node
= snode
;
2474 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2475 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2476 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2477 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2482 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2483 || TREE_CODE (newdecl
) == VAR_DECL
)
2485 if (DECL_EXTERNAL (olddecl
)
2486 || TREE_PUBLIC (olddecl
)
2487 || TREE_STATIC (olddecl
))
2489 /* Merge the section attribute.
2490 We want to issue an error if the sections conflict but that must be
2491 done later in decl_attributes since we are called before attributes
2493 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2494 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2496 if (DECL_ONE_ONLY (newdecl
))
2498 struct symtab_node
*oldsym
, *newsym
;
2499 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2500 oldsym
= cgraph_node::get_create (olddecl
);
2502 oldsym
= varpool_node::get_create (olddecl
);
2503 newsym
= symtab_node::get (newdecl
);
2504 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2508 if (TREE_CODE (newdecl
) == VAR_DECL
2509 && DECL_THREAD_LOCAL_P (newdecl
))
2510 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2513 DECL_UID (olddecl
) = olddecl_uid
;
2515 DECL_FRIEND_P (olddecl
) = 1;
2518 DECL_ANTICIPATED (olddecl
) = 1;
2519 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2522 /* NEWDECL contains the merged attribute lists.
2523 Update OLDDECL to be the same. */
2524 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2526 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2527 so that encode_section_info has a chance to look at the new decl
2528 flags and attributes. */
2529 if (DECL_RTL_SET_P (olddecl
)
2530 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2532 && TREE_STATIC (olddecl
))))
2533 make_decl_rtl (olddecl
);
2535 /* The NEWDECL will no longer be needed. Because every out-of-class
2536 declaration of a member results in a call to duplicate_decls,
2537 freeing these nodes represents in a significant savings.
2539 Before releasing the node, be sore to remove function from symbol
2540 table that might have been inserted there to record comdat group.
2541 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2542 structure is shared in between newdecl and oldecl. */
2543 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2544 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2545 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2546 || TREE_CODE (newdecl
) == VAR_DECL
)
2548 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2557 /* Return zero if the declaration NEWDECL is valid
2558 when the declaration OLDDECL (assumed to be for the same name)
2559 has already been seen.
2560 Otherwise return an error message format string with a %s
2561 where the identifier should go. */
2564 redeclaration_error_message (tree newdecl
, tree olddecl
)
2566 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2568 /* Because C++ can put things into name space for free,
2569 constructs like "typedef struct foo { ... } foo"
2570 would look like an erroneous redeclaration. */
2571 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2574 return G_("redefinition of %q#D");
2576 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2578 /* If this is a pure function, its olddecl will actually be
2579 the original initialization to `0' (which we force to call
2580 abort()). Don't complain about redefinition in this case. */
2581 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2582 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2585 /* If both functions come from different namespaces, this is not
2586 a redeclaration - this is a conflict with a used function. */
2587 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2588 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2589 && ! decls_match (olddecl
, newdecl
))
2590 return G_("%qD conflicts with used function");
2592 /* We'll complain about linkage mismatches in
2593 warn_extern_redeclared_static. */
2595 /* Defining the same name twice is no good. */
2596 if (DECL_INITIAL (olddecl
) != NULL_TREE
2597 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2599 if (DECL_NAME (olddecl
) == NULL_TREE
)
2600 return G_("%q#D not declared in class");
2601 else if (!GNU_INLINE_P (olddecl
)
2602 || GNU_INLINE_P (newdecl
))
2603 return G_("redefinition of %q#D");
2606 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2608 bool olda
= GNU_INLINE_P (olddecl
);
2609 bool newa
= GNU_INLINE_P (newdecl
);
2614 return G_("%q+D redeclared inline with "
2615 "%<gnu_inline%> attribute");
2617 return G_("%q+D redeclared inline without "
2618 "%<gnu_inline%> attribute");
2622 check_abi_tag_redeclaration
2623 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2624 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2628 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2632 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2634 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2635 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2636 return G_("redefinition of %q#D");
2640 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2641 || (DECL_TEMPLATE_RESULT (newdecl
)
2642 == DECL_TEMPLATE_RESULT (olddecl
)))
2645 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2646 if (DECL_TEMPLATE_INFO (nt
))
2647 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2648 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2649 if (DECL_TEMPLATE_INFO (ot
))
2650 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2651 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2652 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2653 return G_("redefinition of %q#D");
2655 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2657 bool olda
= GNU_INLINE_P (ot
);
2658 bool newa
= GNU_INLINE_P (nt
);
2663 return G_("%q+D redeclared inline with "
2664 "%<gnu_inline%> attribute");
2666 return G_("%q+D redeclared inline without "
2667 "%<gnu_inline%> attribute");
2671 /* Core issue #226 (C++0x):
2673 If a friend function template declaration specifies a
2674 default template-argument, that declaration shall be a
2675 definition and shall be the only declaration of the
2676 function template in the translation unit. */
2677 if ((cxx_dialect
!= cxx98
)
2678 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2679 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2680 /*is_primary=*/true,
2681 /*is_partial=*/false,
2682 /*is_friend_decl=*/2))
2683 return G_("redeclaration of friend %q#D "
2684 "may not have default template arguments");
2688 else if (VAR_P (newdecl
)
2689 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2690 && (! DECL_LANG_SPECIFIC (olddecl
)
2691 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2692 || DECL_THREAD_LOCAL_P (newdecl
)))
2694 /* Only variables can be thread-local, and all declarations must
2695 agree on this property. */
2696 if (DECL_THREAD_LOCAL_P (newdecl
))
2697 return G_("thread-local declaration of %q#D follows "
2698 "non-thread-local declaration");
2700 return G_("non-thread-local declaration of %q#D follows "
2701 "thread-local declaration");
2703 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2705 /* The objects have been declared at namespace scope. If either
2706 is a member of an anonymous union, then this is an invalid
2707 redeclaration. For example:
2713 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2714 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2715 return G_("redeclaration of %q#D");
2716 /* If at least one declaration is a reference, there is no
2717 conflict. For example:
2723 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2725 /* Reject two definitions. */
2726 return G_("redefinition of %q#D");
2730 /* Objects declared with block scope: */
2731 /* Reject two definitions, and reject a definition
2732 together with an external reference. */
2733 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2734 return G_("redeclaration of %q#D");
2739 /* Hash and equality functions for the named_label table. */
2742 named_label_hasher::hash (named_label_entry
*ent
)
2744 return DECL_UID (ent
->label_decl
);
2748 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2750 return a
->label_decl
== b
->label_decl
;
2753 /* Create a new label, named ID. */
2756 make_label_decl (tree id
, int local_p
)
2758 struct named_label_entry
*ent
;
2761 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2763 DECL_CONTEXT (decl
) = current_function_decl
;
2764 DECL_MODE (decl
) = VOIDmode
;
2765 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2767 /* Say where one reference is to the label, for the sake of the
2768 error if it is not defined. */
2769 DECL_SOURCE_LOCATION (decl
) = input_location
;
2771 /* Record the fact that this identifier is bound to this label. */
2772 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2774 /* Create the label htab for the function on demand. */
2776 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2778 /* Record this label on the list of labels used in this function.
2779 We do this before calling make_label_decl so that we get the
2780 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2781 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2782 ent
->label_decl
= decl
;
2784 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2785 gcc_assert (*slot
== NULL
);
2791 /* Look for a label named ID in the current function. If one cannot
2792 be found, create one. (We keep track of used, but undefined,
2793 labels, and complain about them at the end of a function.) */
2796 lookup_label_1 (tree id
)
2800 /* You can't use labels at global scope. */
2801 if (current_function_decl
== NULL_TREE
)
2803 error ("label %qE referenced outside of any function", id
);
2807 /* See if we've already got this label. */
2808 decl
= IDENTIFIER_LABEL_VALUE (id
);
2809 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2812 decl
= make_label_decl (id
, /*local_p=*/0);
2816 /* Wrapper for lookup_label_1. */
2819 lookup_label (tree id
)
2822 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2823 ret
= lookup_label_1 (id
);
2824 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2828 /* Declare a local label named ID. */
2831 declare_local_label (tree id
)
2834 cp_label_binding bind
;
2836 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2837 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2838 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2840 decl
= make_label_decl (id
, /*local_p=*/1);
2842 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2847 /* Returns nonzero if it is ill-formed to jump past the declaration of
2848 DECL. Returns 2 if it's also a real problem. */
2851 decl_jump_unsafe (tree decl
)
2853 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2854 with automatic storage duration is not in scope to a point where it is
2855 in scope is ill-formed unless the variable has scalar type, class type
2856 with a trivial default constructor and a trivial destructor, a
2857 cv-qualified version of one of these types, or an array of one of the
2858 preceding types and is declared without an initializer (8.5). */
2859 tree type
= TREE_TYPE (decl
);
2861 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2862 || type
== error_mark_node
)
2865 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2866 || variably_modified_type_p (type
, NULL_TREE
))
2869 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2875 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2878 identify_goto (tree decl
, const location_t
*locus
)
2881 permerror (input_location
, "jump to label %qD", decl
);
2883 permerror (input_location
, "jump to case label");
2885 permerror (*locus
, " from here");
2888 /* Check that a single previously seen jump to a newly defined label
2889 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2890 the jump context; NAMES are the names in scope in LEVEL at the jump
2891 context; LOCUS is the source position of the jump or 0. Returns
2892 true if all is well. */
2895 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2896 bool exited_omp
, const location_t
*locus
)
2898 cp_binding_level
*b
;
2899 bool identified
= false, saw_eh
= false, saw_omp
= false;
2903 identify_goto (decl
, locus
);
2904 error (" exits OpenMP structured block");
2905 identified
= saw_omp
= true;
2908 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2910 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2912 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2913 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2914 : TREE_CHAIN (new_decls
)))
2916 int problem
= decl_jump_unsafe (new_decls
);
2922 identify_goto (decl
, locus
);
2926 error (" crosses initialization of %q+#D", new_decls
);
2928 permerror (input_location
, " enters scope of %q+#D which has "
2929 "non-trivial destructor", new_decls
);
2934 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2938 identify_goto (decl
, locus
);
2941 if (b
->kind
== sk_try
)
2942 error (" enters try block");
2944 error (" enters catch block");
2947 if (b
->kind
== sk_omp
&& !saw_omp
)
2951 identify_goto (decl
, locus
);
2954 error (" enters OpenMP structured block");
2963 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2965 check_previous_goto_1 (decl
, use
->binding_level
,
2966 use
->names_in_scope
, use
->in_omp_scope
,
2967 &use
->o_goto_locus
);
2971 check_switch_goto (cp_binding_level
* level
)
2973 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2976 /* Check that a new jump to a label DECL is OK. Called by
2977 finish_goto_stmt. */
2980 check_goto (tree decl
)
2982 struct named_label_entry
*ent
, dummy
;
2983 bool saw_catch
= false, identified
= false;
2987 /* We can't know where a computed goto is jumping.
2988 So we assume that it's OK. */
2989 if (TREE_CODE (decl
) != LABEL_DECL
)
2992 /* We didn't record any information about this label when we created it,
2993 and there's not much point since it's trivial to analyze as a return. */
2994 if (decl
== cdtor_label
)
2997 dummy
.label_decl
= decl
;
2998 ent
= named_labels
->find (&dummy
);
2999 gcc_assert (ent
!= NULL
);
3001 /* If the label hasn't been defined yet, defer checking. */
3002 if (! DECL_INITIAL (decl
))
3004 struct named_label_use_entry
*new_use
;
3006 /* Don't bother creating another use if the last goto had the
3007 same data, and will therefore create the same set of errors. */
3009 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3012 new_use
= ggc_alloc
<named_label_use_entry
> ();
3013 new_use
->binding_level
= current_binding_level
;
3014 new_use
->names_in_scope
= current_binding_level
->names
;
3015 new_use
->o_goto_locus
= input_location
;
3016 new_use
->in_omp_scope
= false;
3018 new_use
->next
= ent
->uses
;
3019 ent
->uses
= new_use
;
3023 if (ent
->in_try_scope
|| ent
->in_catch_scope
3024 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3026 permerror (input_location
, "jump to label %q+D", decl
);
3027 permerror (input_location
, " from here");
3031 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3033 int u
= decl_jump_unsafe (bad
);
3035 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3037 /* Can't skip init of __exception_info. */
3038 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3042 error (" skips initialization of %q+#D", bad
);
3044 permerror (input_location
, " enters scope of %q+#D which has "
3045 "non-trivial destructor", bad
);
3048 if (ent
->in_try_scope
)
3049 error (" enters try block");
3050 else if (ent
->in_catch_scope
&& !saw_catch
)
3051 error (" enters catch block");
3053 if (ent
->in_omp_scope
)
3054 error (" enters OpenMP structured block");
3055 else if (flag_openmp
)
3057 cp_binding_level
*b
;
3058 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3060 if (b
== ent
->binding_level
)
3062 if (b
->kind
== sk_omp
)
3066 permerror (input_location
, "jump to label %q+D", decl
);
3067 permerror (input_location
, " from here");
3070 error (" exits OpenMP structured block");
3077 /* Check that a return is ok wrt OpenMP structured blocks.
3078 Called by finish_return_stmt. Returns true if all is well. */
3081 check_omp_return (void)
3083 cp_binding_level
*b
;
3084 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3085 if (b
->kind
== sk_omp
)
3087 error ("invalid exit from OpenMP structured block");
3090 else if (b
->kind
== sk_function_parms
)
3095 /* Define a label, specifying the location in the source file.
3096 Return the LABEL_DECL node for the label. */
3099 define_label_1 (location_t location
, tree name
)
3101 struct named_label_entry
*ent
, dummy
;
3102 cp_binding_level
*p
;
3105 decl
= lookup_label (name
);
3107 dummy
.label_decl
= decl
;
3108 ent
= named_labels
->find (&dummy
);
3109 gcc_assert (ent
!= NULL
);
3111 /* After labels, make any new cleanups in the function go into their
3112 own new (temporary) binding contour. */
3113 for (p
= current_binding_level
;
3114 p
->kind
!= sk_function_parms
;
3116 p
->more_cleanups_ok
= 0;
3118 if (name
== get_identifier ("wchar_t"))
3119 permerror (input_location
, "label named wchar_t");
3121 if (DECL_INITIAL (decl
) != NULL_TREE
)
3123 error ("duplicate label %qD", decl
);
3124 return error_mark_node
;
3128 struct named_label_use_entry
*use
;
3130 /* Mark label as having been defined. */
3131 DECL_INITIAL (decl
) = error_mark_node
;
3132 /* Say where in the source. */
3133 DECL_SOURCE_LOCATION (decl
) = location
;
3135 ent
->binding_level
= current_binding_level
;
3136 ent
->names_in_scope
= current_binding_level
->names
;
3138 for (use
= ent
->uses
; use
; use
= use
->next
)
3139 check_previous_goto (decl
, use
);
3146 /* Wrapper for define_label_1. */
3149 define_label (location_t location
, tree name
)
3152 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3153 ret
= define_label_1 (location
, name
);
3154 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3161 cp_binding_level
*level
;
3162 struct cp_switch
*next
;
3163 /* The SWITCH_STMT being built. */
3165 /* A splay-tree mapping the low element of a case range to the high
3166 element, or NULL_TREE if there is no high element. Used to
3167 determine whether or not a new case label duplicates an old case
3168 label. We need a tree, rather than simply a hash table, because
3169 of the GNU case range extension. */
3173 /* A stack of the currently active switch statements. The innermost
3174 switch statement is on the top of the stack. There is no need to
3175 mark the stack for garbage collection because it is only active
3176 during the processing of the body of a function, and we never
3177 collect at that point. */
3179 static struct cp_switch
*switch_stack
;
3181 /* Called right after a switch-statement condition is parsed.
3182 SWITCH_STMT is the switch statement being parsed. */
3185 push_switch (tree switch_stmt
)
3187 struct cp_switch
*p
= XNEW (struct cp_switch
);
3188 p
->level
= current_binding_level
;
3189 p
->next
= switch_stack
;
3190 p
->switch_stmt
= switch_stmt
;
3191 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3198 struct cp_switch
*cs
= switch_stack
;
3199 location_t switch_location
;
3201 /* Emit warnings as needed. */
3202 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3203 if (!processing_template_decl
)
3204 c_do_switch_warnings (cs
->cases
, switch_location
,
3205 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3206 SWITCH_STMT_COND (cs
->switch_stmt
));
3208 splay_tree_delete (cs
->cases
);
3209 switch_stack
= switch_stack
->next
;
3213 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3214 condition. Note that if TYPE and VALUE are already integral we don't
3215 really do the conversion because the language-independent
3216 warning/optimization code will work better that way. */
3219 case_conversion (tree type
, tree value
)
3221 if (value
== NULL_TREE
)
3224 if (cxx_dialect
>= cxx11
3225 && (SCOPED_ENUM_P (type
)
3226 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3228 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3229 type
= type_promotes_to (type
);
3230 value
= (perform_implicit_conversion_flags
3231 (type
, value
, tf_warning_or_error
,
3232 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3234 return cxx_constant_value (value
);
3237 /* Note that we've seen a definition of a case label, and complain if this
3238 is a bad place for one. */
3241 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3244 cp_binding_level
*p
;
3247 if (processing_template_decl
)
3251 /* For templates, just add the case label; we'll do semantic
3252 analysis at instantiation-time. */
3253 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3254 return add_stmt (build_case_label (low_value
, high_value
, label
));
3257 /* Find the condition on which this switch statement depends. */
3258 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3259 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3260 cond
= TREE_VALUE (cond
);
3262 if (!check_switch_goto (switch_stack
->level
))
3263 return error_mark_node
;
3265 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3267 low_value
= case_conversion (type
, low_value
);
3268 high_value
= case_conversion (type
, high_value
);
3270 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3271 low_value
, high_value
);
3273 /* After labels, make any new cleanups in the function go into their
3274 own new (temporary) binding contour. */
3275 for (p
= current_binding_level
;
3276 p
->kind
!= sk_function_parms
;
3278 p
->more_cleanups_ok
= 0;
3283 struct typename_info
{
3291 struct typename_hasher
: ggc_hasher
<tree
>
3293 typedef typename_info
*compare_type
;
3295 /* Hash a TYPENAME_TYPE. */
3302 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3303 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3308 /* Compare two TYPENAME_TYPEs. */
3311 equal (tree t1
, const typename_info
*t2
)
3313 return (TYPE_IDENTIFIER (t1
) == t2
->name
3314 && TYPE_CONTEXT (t1
) == t2
->scope
3315 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3316 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3317 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3321 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3322 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3324 Returns the new TYPENAME_TYPE. */
3326 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3329 build_typename_type (tree context
, tree name
, tree fullname
,
3330 enum tag_types tag_type
)
3338 if (typename_htab
== NULL
)
3339 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3341 ti
.scope
= FROB_CONTEXT (context
);
3343 ti
.template_id
= fullname
;
3344 ti
.enum_p
= tag_type
== enum_type
;
3345 ti
.class_p
= (tag_type
== class_type
3346 || tag_type
== record_type
3347 || tag_type
== union_type
);
3348 hash
= (htab_hash_pointer (ti
.scope
)
3349 ^ htab_hash_pointer (ti
.name
));
3351 /* See if we already have this type. */
3352 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3357 /* Build the TYPENAME_TYPE. */
3358 t
= cxx_make_type (TYPENAME_TYPE
);
3359 TYPE_CONTEXT (t
) = ti
.scope
;
3360 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3361 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3362 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3364 /* Build the corresponding TYPE_DECL. */
3365 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3366 TYPE_NAME (TREE_TYPE (d
)) = d
;
3367 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3368 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3369 DECL_ARTIFICIAL (d
) = 1;
3371 /* Store it in the hash table. */
3374 /* TYPENAME_TYPEs must always be compared structurally, because
3375 they may or may not resolve down to another type depending on
3376 the currently open classes. */
3377 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3383 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3384 provided to name the type. Returns an appropriate type, unless an
3385 error occurs, in which case error_mark_node is returned. If we
3386 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3387 return that, rather than the _TYPE it corresponds to, in other
3388 cases we look through the type decl. If TF_ERROR is set, complain
3389 about errors, otherwise be quiet. */
3392 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3393 tsubst_flags_t complain
)
3399 if (name
== error_mark_node
3400 || context
== NULL_TREE
3401 || context
== error_mark_node
)
3402 return error_mark_node
;
3406 if (!(TYPE_LANG_SPECIFIC (name
)
3407 && (CLASSTYPE_IS_TEMPLATE (name
)
3408 || CLASSTYPE_USE_TEMPLATE (name
))))
3409 name
= TYPE_IDENTIFIER (name
);
3411 /* Create a TEMPLATE_ID_EXPR for the type. */
3412 name
= build_nt (TEMPLATE_ID_EXPR
,
3413 CLASSTYPE_TI_TEMPLATE (name
),
3414 CLASSTYPE_TI_ARGS (name
));
3416 else if (TREE_CODE (name
) == TYPE_DECL
)
3417 name
= DECL_NAME (name
);
3421 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3423 name
= TREE_OPERAND (name
, 0);
3424 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3425 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3426 else if (TREE_CODE (name
) == OVERLOAD
)
3428 if (complain
& tf_error
)
3429 error ("%qD is not a type", name
);
3430 return error_mark_node
;
3433 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3435 if (complain
& tf_error
)
3436 error ("%qD used without template parameters", name
);
3437 return error_mark_node
;
3439 gcc_assert (identifier_p (name
));
3440 gcc_assert (TYPE_P (context
));
3442 if (!MAYBE_CLASS_TYPE_P (context
))
3444 if (complain
& tf_error
)
3445 error ("%q#T is not a class", context
);
3446 return error_mark_node
;
3449 /* When the CONTEXT is a dependent type, NAME could refer to a
3450 dependent base class of CONTEXT. But look inside it anyway
3451 if CONTEXT is a currently open scope, in case it refers to a
3452 member of the current instantiation or a non-dependent base;
3453 lookup will stop when we hit a dependent base. */
3454 if (!dependent_scope_p (context
))
3455 /* We should only set WANT_TYPE when we're a nested typename type.
3456 Then we can give better diagnostics if we find a non-type. */
3457 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3461 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3462 return build_typename_type (context
, name
, fullname
, tag_type
);
3464 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3468 if (complain
& tf_error
)
3469 error (want_template
? G_("no class template named %q#T in %q#T")
3470 : G_("no type named %q#T in %q#T"), name
, context
);
3471 return error_mark_node
;
3474 /* Pull out the template from an injected-class-name (or multiple). */
3476 t
= maybe_get_template_decl_from_type_decl (t
);
3478 if (TREE_CODE (t
) == TREE_LIST
)
3480 if (complain
& tf_error
)
3482 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3483 print_candidates (t
);
3485 return error_mark_node
;
3488 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3490 if (complain
& tf_error
)
3491 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3493 return error_mark_node
;
3495 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3497 if (complain
& tf_error
)
3498 error ("%<typename %T::%D%> names %q#T, which is not a type",
3500 return error_mark_node
;
3503 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3504 return error_mark_node
;
3506 /* If we are currently parsing a template and if T is a typedef accessed
3507 through CONTEXT then we need to remember and check access of T at
3508 template instantiation time. */
3509 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3512 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3514 /*entering_scope=*/0,
3515 tf_warning_or_error
| tf_user
);
3517 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3520 maybe_record_typedef_use (t
);
3525 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3526 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3527 in which case error_mark_node is returned.
3529 If PARM_LIST is non-NULL, also make sure that the template parameter
3530 list of TEMPLATE_DECL matches.
3532 If COMPLAIN zero, don't complain about any errors that occur. */
3535 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3536 tsubst_flags_t complain
)
3542 name
= TYPE_IDENTIFIER (name
);
3543 else if (DECL_P (name
))
3544 name
= DECL_NAME (name
);
3545 gcc_assert (identifier_p (name
));
3547 if (!dependent_type_p (context
)
3548 || currently_open_class (context
))
3550 tree tmpl
= NULL_TREE
;
3552 if (MAYBE_CLASS_TYPE_P (context
))
3553 tmpl
= lookup_field (context
, name
, 0, false);
3555 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3556 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3558 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3560 if (complain
& tf_error
)
3561 error ("no class template named %q#T in %q#T", name
, context
);
3562 return error_mark_node
;
3566 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3568 if (complain
& tf_error
)
3570 error ("template parameters do not match template %qD", tmpl
);
3571 inform (DECL_SOURCE_LOCATION (tmpl
),
3572 "%qD declared here", tmpl
);
3574 return error_mark_node
;
3577 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3579 return error_mark_node
;
3584 /* Build the UNBOUND_CLASS_TEMPLATE. */
3585 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3586 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3587 TREE_TYPE (t
) = NULL_TREE
;
3588 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3590 /* Build the corresponding TEMPLATE_DECL. */
3591 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3592 TYPE_NAME (TREE_TYPE (d
)) = d
;
3593 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3594 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3595 DECL_ARTIFICIAL (d
) = 1;
3596 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3603 /* Push the declarations of builtin types into the namespace.
3604 RID_INDEX is the index of the builtin type in the array
3605 RID_POINTERS. NAME is the name used when looking up the builtin
3606 type. TYPE is the _TYPE node for the builtin type. */
3609 record_builtin_type (enum rid rid_index
,
3613 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3614 tree tdecl
= NULL_TREE
;
3616 if ((int) rid_index
< (int) RID_MAX
)
3617 rname
= ridpointers
[(int) rid_index
];
3619 tname
= get_identifier (name
);
3621 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3622 eliminated. Built-in types should not be looked up name; their
3623 names are keywords that the parser can recognize. However, there
3624 is code in c-common.c that uses identifier_global_value to look
3625 up built-in types by name. */
3628 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3629 DECL_ARTIFICIAL (tdecl
) = 1;
3630 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3636 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3637 DECL_ARTIFICIAL (tdecl
) = 1;
3639 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3642 if (!TYPE_NAME (type
))
3643 TYPE_NAME (type
) = tdecl
;
3646 debug_hooks
->type_decl (tdecl
, 0);
3649 /* Record one of the standard Java types.
3650 * Declare it as having the given NAME.
3651 * If SIZE > 0, it is the size of one of the integral types;
3652 * otherwise it is the negative of the size of one of the other types. */
3655 record_builtin_java_type (const char* name
, int size
)
3660 type
= build_nonstandard_integer_type (size
, 0);
3661 type
= build_distinct_type_copy (type
);
3663 else if (size
> -32)
3666 /* "__java_char" or ""__java_boolean". */
3667 type
= build_nonstandard_integer_type (-size
, 1);
3668 type
= build_distinct_type_copy (type
);
3669 /* Get the signed type cached and attached to the unsigned type,
3670 so it doesn't get garbage-collected at "random" times,
3671 causing potential codegen differences out of different UIDs
3672 and different alias set numbers. */
3673 stype
= build_nonstandard_integer_type (-size
, 0);
3674 stype
= build_distinct_type_copy (stype
);
3675 TREE_CHAIN (type
) = stype
;
3676 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3679 { /* "__java_float" or ""__java_double". */
3680 type
= make_node (REAL_TYPE
);
3681 TYPE_PRECISION (type
) = - size
;
3684 record_builtin_type (RID_MAX
, name
, type
);
3685 decl
= TYPE_NAME (type
);
3687 /* Suppress generate debug symbol entries for these types,
3688 since for normal C++ they are just clutter.
3689 However, push_lang_context undoes this if extern "Java" is seen. */
3690 DECL_IGNORED_P (decl
) = 1;
3692 TYPE_FOR_JAVA (type
) = 1;
3696 /* Push a type into the namespace so that the back ends ignore it. */
3699 record_unknown_type (tree type
, const char* name
)
3701 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3702 TYPE_DECL
, get_identifier (name
), type
));
3703 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3704 DECL_IGNORED_P (decl
) = 1;
3705 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3706 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3707 TYPE_ALIGN (type
) = 1;
3708 TYPE_USER_ALIGN (type
) = 0;
3709 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3712 /* A string for which we should create an IDENTIFIER_NODE at
3715 typedef struct predefined_identifier
3717 /* The name of the identifier. */
3718 const char *const name
;
3719 /* The place where the IDENTIFIER_NODE should be stored. */
3721 /* Nonzero if this is the name of a constructor or destructor. */
3722 const int ctor_or_dtor_p
;
3723 } predefined_identifier
;
3725 /* Create all the predefined identifiers. */
3728 initialize_predefined_identifiers (void)
3730 const predefined_identifier
*pid
;
3732 /* A table of identifiers to create at startup. */
3733 static const predefined_identifier predefined_identifiers
[] = {
3734 { "C++", &lang_name_cplusplus
, 0 },
3735 { "C", &lang_name_c
, 0 },
3736 { "Java", &lang_name_java
, 0 },
3737 /* Some of these names have a trailing space so that it is
3738 impossible for them to conflict with names written by users. */
3739 { "__ct ", &ctor_identifier
, 1 },
3740 { "__base_ctor ", &base_ctor_identifier
, 1 },
3741 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3742 { "__dt ", &dtor_identifier
, 1 },
3743 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3744 { "__base_dtor ", &base_dtor_identifier
, 1 },
3745 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3746 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3747 { "nelts", &nelts_identifier
, 0 },
3748 { THIS_NAME
, &this_identifier
, 0 },
3749 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3750 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3751 { "_vptr", &vptr_identifier
, 0 },
3752 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3753 { "::", &global_scope_name
, 0 },
3754 { "std", &std_identifier
, 0 },
3758 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3760 *pid
->node
= get_identifier (pid
->name
);
3761 if (pid
->ctor_or_dtor_p
)
3762 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3766 /* Create the predefined scalar types of C,
3767 and some nodes representing standard constants (0, 1, (void *)0).
3768 Initialize the global binding level.
3769 Make definitions for built-in primitive functions. */
3772 cxx_init_decl_processing (void)
3775 tree void_ftype_ptr
;
3777 /* Create all the identifiers we need. */
3778 initialize_predefined_identifiers ();
3780 /* Create the global variables. */
3781 push_to_top_level ();
3783 current_function_decl
= NULL_TREE
;
3784 current_binding_level
= NULL
;
3785 /* Enter the global namespace. */
3786 gcc_assert (global_namespace
== NULL_TREE
);
3787 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3789 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3790 TREE_PUBLIC (global_namespace
) = 1;
3791 begin_scope (sk_namespace
, global_namespace
);
3793 if (flag_visibility_ms_compat
)
3794 default_visibility
= VISIBILITY_HIDDEN
;
3797 current_lang_name
= lang_name_c
;
3799 /* Create the `std' namespace. */
3800 push_namespace (std_identifier
);
3801 std_node
= current_namespace
;
3804 c_common_nodes_and_builtins ();
3806 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3807 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3808 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3809 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3810 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3811 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3812 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3813 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3815 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3817 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3818 truthvalue_type_node
= boolean_type_node
;
3819 truthvalue_false_node
= boolean_false_node
;
3820 truthvalue_true_node
= boolean_true_node
;
3822 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3823 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3824 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3827 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3830 delta_type_node
= ptrdiff_type_node
;
3831 vtable_index_type
= ptrdiff_type_node
;
3833 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3834 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3835 void_ftype_ptr
= build_function_type_list (void_type_node
,
3836 ptr_type_node
, NULL_TREE
);
3838 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3840 /* C++ extensions */
3842 unknown_type_node
= make_node (LANG_TYPE
);
3843 record_unknown_type (unknown_type_node
, "unknown type");
3845 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3846 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3848 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3850 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3851 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3853 init_list_type_node
= make_node (LANG_TYPE
);
3854 record_unknown_type (init_list_type_node
, "init list");
3857 /* Make sure we get a unique function type, so we can give
3858 its pointer type a name. (This wins for gdb.) */
3859 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3860 TREE_TYPE (vfunc_type
) = integer_type_node
;
3861 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3862 layout_type (vfunc_type
);
3864 vtable_entry_type
= build_pointer_type (vfunc_type
);
3866 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3869 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3870 layout_type (vtbl_type_node
);
3871 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3872 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3873 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3874 layout_type (vtbl_ptr_type_node
);
3875 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3877 push_namespace (get_identifier ("__cxxabiv1"));
3878 abi_node
= current_namespace
;
3881 global_type_node
= make_node (LANG_TYPE
);
3882 record_unknown_type (global_type_node
, "global type");
3885 current_lang_name
= lang_name_cplusplus
;
3888 tree newattrs
, extvisattr
;
3889 tree newtype
, deltype
;
3890 tree ptr_ftype_sizetype
;
3894 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3895 if (cxx_dialect
== cxx98
)
3898 tree bad_alloc_type_node
;
3899 tree bad_alloc_decl
;
3901 push_namespace (std_identifier
);
3902 bad_alloc_id
= get_identifier ("bad_alloc");
3903 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3904 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3906 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3907 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3911 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3914 new_eh_spec
= noexcept_false_spec
;
3916 /* Ensure attribs.c is initialized. */
3918 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3920 newattrs
= tree_cons (get_identifier ("alloc_size"),
3921 build_tree_list (NULL_TREE
, integer_one_node
),
3923 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3924 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3925 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3926 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3927 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3928 DECL_IS_MALLOC (opnew
) = 1;
3929 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3930 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3931 DECL_IS_MALLOC (opnew
) = 1;
3932 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3933 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3934 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3936 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3937 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3938 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3939 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3940 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3941 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3942 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3943 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3947 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3948 ECF_NORETURN
| ECF_NOTHROW
);
3950 /* Perform other language dependent initializations. */
3951 init_class_processing ();
3952 init_rtti_processing ();
3953 init_template_processing ();
3955 if (flag_exceptions
)
3956 init_exception_processing ();
3958 if (! supports_one_only ())
3961 make_fname_decl
= cp_make_fname_decl
;
3962 start_fname_decls ();
3964 /* Show we use EH for cleanups. */
3965 if (flag_exceptions
)
3966 using_eh_for_cleanups ();
3969 /* Generate an initializer for a function naming variable from
3970 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3971 filled in with the type of the init. */
3974 cp_fname_init (const char* name
, tree
*type_p
)
3976 tree domain
= NULL_TREE
;
3978 tree init
= NULL_TREE
;
3983 length
= strlen (name
);
3984 domain
= build_index_type (size_int (length
));
3985 init
= build_string (length
+ 1, name
);
3988 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3989 type
= build_cplus_array_type (type
, domain
);
3994 TREE_TYPE (init
) = type
;
3996 init
= error_mark_node
;
4001 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4002 the decl, LOC is the location to give the decl, NAME is the
4003 initialization string and TYPE_DEP indicates whether NAME depended
4004 on the type of the function. We make use of that to detect
4005 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4006 at the point of first use, so we mustn't push the decl now. */
4009 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4011 const char *const name
= (type_dep
&& processing_template_decl
4012 ? NULL
: fname_as_string (type_dep
));
4014 tree init
= cp_fname_init (name
, &type
);
4015 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4018 free (CONST_CAST (char *, name
));
4020 /* As we're using pushdecl_with_scope, we must set the context. */
4021 DECL_CONTEXT (decl
) = current_function_decl
;
4023 TREE_STATIC (decl
) = 1;
4024 TREE_READONLY (decl
) = 1;
4025 DECL_ARTIFICIAL (decl
) = 1;
4027 TREE_USED (decl
) = 1;
4029 if (current_function_decl
)
4031 cp_binding_level
*b
= current_binding_level
;
4032 if (b
->kind
== sk_function_parms
)
4033 return error_mark_node
;
4034 while (b
->level_chain
->kind
!= sk_function_parms
)
4036 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4037 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4038 LOOKUP_ONLYCONVERTING
);
4042 DECL_THIS_STATIC (decl
) = true;
4043 pushdecl_top_level_and_finish (decl
, init
);
4050 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4052 tree id
= DECL_NAME (decl
);
4053 const char *name
= IDENTIFIER_POINTER (id
);
4055 retrofit_lang_decl (decl
);
4057 DECL_ARTIFICIAL (decl
) = 1;
4058 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4059 SET_DECL_LANGUAGE (decl
, lang_c
);
4060 /* Runtime library routines are, by definition, available in an
4061 external shared object. */
4062 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4063 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4065 DECL_CONTEXT (decl
) = context
;
4068 pushdecl_top_level (decl
);
4072 /* A function in the user's namespace should have an explicit
4073 declaration before it is used. Mark the built-in function as
4074 anticipated but not actually declared. */
4075 if (name
[0] != '_' || name
[1] != '_')
4076 DECL_ANTICIPATED (decl
) = 1;
4077 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4079 size_t len
= strlen (name
);
4081 /* Treat __*_chk fortification functions as anticipated as well,
4082 unless they are __builtin_*. */
4083 if (len
> strlen ("___chk")
4084 && memcmp (name
+ len
- strlen ("_chk"),
4085 "_chk", strlen ("_chk") + 1) == 0)
4086 DECL_ANTICIPATED (decl
) = 1;
4093 cxx_builtin_function (tree decl
)
4095 tree id
= DECL_NAME (decl
);
4096 const char *name
= IDENTIFIER_POINTER (id
);
4097 /* All builtins that don't begin with an '_' should additionally
4098 go in the 'std' namespace. */
4101 tree decl2
= copy_node(decl
);
4102 push_namespace (std_identifier
);
4103 builtin_function_1 (decl2
, std_node
, false);
4107 return builtin_function_1 (decl
, NULL_TREE
, false);
4110 /* Like cxx_builtin_function, but guarantee the function is added to the global
4111 scope. This is to allow function specific options to add new machine
4112 dependent builtins when the target ISA changes via attribute((target(...)))
4113 which saves space on program startup if the program does not use non-generic
4117 cxx_builtin_function_ext_scope (tree decl
)
4120 tree id
= DECL_NAME (decl
);
4121 const char *name
= IDENTIFIER_POINTER (id
);
4122 /* All builtins that don't begin with an '_' should additionally
4123 go in the 'std' namespace. */
4126 tree decl2
= copy_node(decl
);
4127 push_namespace (std_identifier
);
4128 builtin_function_1 (decl2
, std_node
, true);
4132 return builtin_function_1 (decl
, NULL_TREE
, true);
4135 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4136 function. Not called directly. */
4139 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4142 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4143 DECL_EXTERNAL (fn
) = 1;
4144 TREE_PUBLIC (fn
) = 1;
4145 DECL_ARTIFICIAL (fn
) = 1;
4146 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4147 SET_DECL_LANGUAGE (fn
, lang_c
);
4148 /* Runtime library routines are, by definition, available in an
4149 external shared object. */
4150 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4151 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4152 set_call_expr_flags (fn
, ecf_flags
);
4156 /* Returns the _DECL for a library function with C++ linkage. */
4159 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4162 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4163 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4164 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4168 /* Like build_library_fn, but takes a C string instead of an
4172 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4174 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4177 /* Like build_cp_library_fn, but takes a C string instead of an
4181 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4183 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4187 /* Like build_library_fn, but also pushes the function so that we will
4188 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4189 may throw exceptions listed in RAISES. */
4192 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4197 type
= build_exception_variant (type
, raises
);
4199 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4200 pushdecl_top_level (fn
);
4204 /* Like build_cp_library_fn, but also pushes the function so that it
4205 will be found by normal lookup. */
4208 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4211 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4216 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4220 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4224 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4226 tree type
= build_function_type (void_type_node
, parmtypes
);
4227 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4230 /* Like push_library_fn, but also note that this function throws
4231 and does not return. Used for __throw_foo and the like. */
4234 push_throw_library_fn (tree name
, tree type
)
4236 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4240 /* When we call finish_struct for an anonymous union, we create
4241 default copy constructors and such. But, an anonymous union
4242 shouldn't have such things; this function undoes the damage to the
4243 anonymous union type T.
4245 (The reason that we create the synthesized methods is that we don't
4246 distinguish `union { int i; }' from `typedef union { int i; } U'.
4247 The first is an anonymous union; the second is just an ordinary
4251 fixup_anonymous_aggr (tree t
)
4255 /* Wipe out memory of synthesized methods. */
4256 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4257 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4258 TYPE_HAS_COPY_CTOR (t
) = 0;
4259 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4260 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4261 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4263 /* Splice the implicitly generated functions out of the TYPE_METHODS
4265 q
= &TYPE_METHODS (t
);
4268 if (DECL_ARTIFICIAL (*q
))
4269 *q
= TREE_CHAIN (*q
);
4271 q
= &DECL_CHAIN (*q
);
4274 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4275 if (TYPE_METHODS (t
))
4277 tree decl
= TYPE_MAIN_DECL (t
);
4279 if (TREE_CODE (t
) != UNION_TYPE
)
4280 error_at (DECL_SOURCE_LOCATION (decl
),
4281 "an anonymous struct cannot have function members");
4283 error_at (DECL_SOURCE_LOCATION (decl
),
4284 "an anonymous union cannot have function members");
4287 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4288 assignment operators (because they cannot have these methods themselves).
4289 For anonymous unions this is already checked because they are not allowed
4290 in any union, otherwise we have to check it. */
4291 if (TREE_CODE (t
) != UNION_TYPE
)
4295 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4296 if (TREE_CODE (field
) == FIELD_DECL
)
4298 type
= TREE_TYPE (field
);
4299 if (CLASS_TYPE_P (type
))
4301 if (TYPE_NEEDS_CONSTRUCTING (type
))
4302 error ("member %q+#D with constructor not allowed "
4303 "in anonymous aggregate", field
);
4304 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4305 error ("member %q+#D with destructor not allowed "
4306 "in anonymous aggregate", field
);
4307 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4308 error ("member %q+#D with copy assignment operator "
4309 "not allowed in anonymous aggregate", field
);
4315 /* Warn for an attribute located at LOCATION that appertains to the
4316 class type CLASS_TYPE that has not been properly placed after its
4317 class-key, in it class-specifier. */
4320 warn_misplaced_attr_for_class_type (source_location location
,
4323 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4325 if (warning_at (location
, OPT_Wattributes
,
4326 "attribute ignored in declaration "
4327 "of %q#T", class_type
))
4329 "attribute for %q#T must follow the %qs keyword",
4330 class_type
, class_key_or_enum_as_string (class_type
));
4333 /* Make sure that a declaration with no declarator is well-formed, i.e.
4334 just declares a tagged type or anonymous union.
4336 Returns the type declared; or NULL_TREE if none. */
4339 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4340 bool explicit_type_instantiation_p
)
4342 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4343 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4344 /* If a class, struct, or enum type is declared by the DECLSPECS
4345 (i.e, if a class-specifier, enum-specifier, or non-typename
4346 elaborated-type-specifier appears in the DECLSPECS),
4347 DECLARED_TYPE is set to the corresponding type. */
4348 tree declared_type
= NULL_TREE
;
4349 bool error_p
= false;
4351 if (declspecs
->multiple_types_p
)
4352 error ("multiple types in one declaration");
4353 else if (declspecs
->redefined_builtin_type
)
4355 if (!in_system_header_at (input_location
))
4356 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4357 "redeclaration of C++ built-in type %qT",
4358 declspecs
->redefined_builtin_type
);
4363 && TYPE_P (declspecs
->type
)
4364 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4365 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4366 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4367 declared_type
= declspecs
->type
;
4368 else if (declspecs
->type
== error_mark_node
)
4370 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4371 permerror (input_location
, "declaration does not declare anything");
4372 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4374 error ("%<auto%> can only be specified for variables "
4375 "or function declarations");
4376 return error_mark_node
;
4378 /* Check for an anonymous union. */
4379 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4380 && TYPE_ANONYMOUS_P (declared_type
))
4382 /* 7/3 In a simple-declaration, the optional init-declarator-list
4383 can be omitted only when declaring a class (clause 9) or
4384 enumeration (7.2), that is, when the decl-specifier-seq contains
4385 either a class-specifier, an elaborated-type-specifier with
4386 a class-key (9.1), or an enum-specifier. In these cases and
4387 whenever a class-specifier or enum-specifier is present in the
4388 decl-specifier-seq, the identifiers in these specifiers are among
4389 the names being declared by the declaration (as class-name,
4390 enum-names, or enumerators, depending on the syntax). In such
4391 cases, and except for the declaration of an unnamed bit-field (9.6),
4392 the decl-specifier-seq shall introduce one or more names into the
4393 program, or shall redeclare a name introduced by a previous
4394 declaration. [Example:
4395 enum { }; // ill-formed
4396 typedef class { }; // ill-formed
4400 error ("missing type-name in typedef-declaration");
4403 /* Anonymous unions are objects, so they can have specifiers. */;
4404 SET_ANON_AGGR_TYPE_P (declared_type
);
4406 if (TREE_CODE (declared_type
) != UNION_TYPE
4407 && !in_system_header_at (input_location
))
4408 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4413 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4414 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4415 error ("%qs can only be specified for functions",
4416 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4417 ? "inline" : "virtual");
4419 && (!current_class_type
4420 || current_scope () != current_class_type
))
4421 error ("%<friend%> can only be specified inside a class");
4422 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4423 error ("%<explicit%> can only be specified for constructors");
4424 else if (declspecs
->storage_class
)
4425 error ("a storage class can only be specified for objects "
4427 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4428 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4429 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4430 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4431 error ("qualifiers can only be specified for objects "
4433 else if (saw_typedef
)
4434 warning (0, "%<typedef%> was ignored in this declaration");
4435 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4436 error ("%<constexpr%> cannot be used for type declarations");
4439 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4442 if (!CLASS_TYPE_P (declared_type
)
4443 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4444 /* For a non-template class, use the name location. */
4445 loc
= location_of (declared_type
);
4447 /* For a template class (an explicit instantiation), use the
4448 current location. */
4449 loc
= input_location
;
4451 if (explicit_type_instantiation_p
)
4452 /* [dcl.attr.grammar]/4:
4454 No attribute-specifier-seq shall appertain to an explicit
4457 if (warning_at (loc
, OPT_Wattributes
,
4458 "attribute ignored in explicit instantiation %q#T",
4461 "no attribute can be applied to "
4462 "an explicit instantiation");
4465 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4468 return declared_type
;
4471 /* Called when a declaration is seen that contains no names to declare.
4472 If its type is a reference to a structure, union or enum inherited
4473 from a containing scope, shadow that tag name for the current scope
4474 with a forward reference.
4475 If its type defines a new named structure or union
4476 or defines an enum, it is valid but we need not do anything here.
4477 Otherwise, it is an error.
4479 C++: may have to grok the declspecs to learn about static,
4480 complain for anonymous unions.
4482 Returns the TYPE declared -- or NULL_TREE if none. */
4485 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4487 tree t
= check_tag_decl (declspecs
,
4488 /*explicit_type_instantiation_p=*/false);
4493 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4496 /* This is where the variables in an anonymous union are
4497 declared. An anonymous union declaration looks like:
4499 because there is no declarator after the union, the parser
4500 sends that declaration here. */
4501 if (ANON_AGGR_TYPE_P (t
))
4503 fixup_anonymous_aggr (t
);
4505 if (TYPE_FIELDS (t
))
4507 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4508 declspecs
, NORMAL
, 0, NULL
);
4509 finish_anon_union (decl
);
4516 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4519 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4520 const cp_declarator
*declarator
,
4521 bool is_template_arg
)
4525 enum decl_context context
4526 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4527 attrs
= type_specifiers
->attributes
;
4528 type_specifiers
->attributes
= NULL_TREE
;
4529 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4530 if (attrs
&& type
!= error_mark_node
)
4532 if (CLASS_TYPE_P (type
))
4533 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4534 "outside of definition", type
);
4535 else if (MAYBE_CLASS_TYPE_P (type
))
4536 /* A template type parameter or other dependent type. */
4537 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4538 "type %qT without an associated declaration", type
);
4540 cplus_decl_attributes (&type
, attrs
, 0);
4545 /* Process a DECLARATOR for a function-scope variable declaration,
4546 namespace-scope variable declaration, or function declaration.
4547 (Function definitions go through start_function; class member
4548 declarations appearing in the body of the class go through
4549 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4550 If an error occurs, the error_mark_node is returned instead.
4552 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4553 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4554 for an explicitly defaulted function, or SD_DELETED for an explicitly
4555 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4556 implicitly initialized via a default constructor. ATTRIBUTES and
4557 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4559 The scope represented by the context of the returned DECL is pushed
4560 (if it is not the global namespace) and is assigned to
4561 *PUSHED_SCOPE_P. The caller is then responsible for calling
4562 pop_scope on *PUSHED_SCOPE_P if it is set. */
4565 start_decl (const cp_declarator
*declarator
,
4566 cp_decl_specifier_seq
*declspecs
,
4569 tree prefix_attributes
,
4570 tree
*pushed_scope_p
)
4578 *pushed_scope_p
= NULL_TREE
;
4580 /* An object declared as __attribute__((deprecated)) suppresses
4581 warnings of uses of other deprecated items. */
4582 if (lookup_attribute ("deprecated", attributes
))
4583 deprecated_state
= DEPRECATED_SUPPRESS
;
4585 attributes
= chainon (attributes
, prefix_attributes
);
4587 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4590 deprecated_state
= DEPRECATED_NORMAL
;
4592 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4593 || decl
== error_mark_node
)
4594 return error_mark_node
;
4596 context
= CP_DECL_CONTEXT (decl
);
4597 if (context
!= global_namespace
)
4598 *pushed_scope_p
= push_scope (context
);
4601 /* Is it valid for this decl to have an initializer at all?
4602 If not, set INITIALIZED to zero, which will indirectly
4603 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4604 switch (TREE_CODE (decl
))
4607 error ("typedef %qD is initialized (use decltype instead)", decl
);
4608 return error_mark_node
;
4611 if (initialized
== SD_DELETED
)
4612 /* We'll handle the rest of the semantics later, but we need to
4613 set this now so it's visible to duplicate_decls. */
4614 DECL_DELETED_FN (decl
) = 1;
4623 if (! toplevel_bindings_p ()
4624 && DECL_EXTERNAL (decl
))
4625 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4627 DECL_EXTERNAL (decl
) = 0;
4628 if (toplevel_bindings_p ())
4629 TREE_STATIC (decl
) = 1;
4631 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4633 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4634 record_key_method_defined (decl
);
4636 /* If this is a typedef that names the class for linkage purposes
4637 (7.1.3p8), apply any attributes directly to the type. */
4638 if (TREE_CODE (decl
) == TYPE_DECL
4639 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4640 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4641 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4645 /* Set attributes here so if duplicate decl, will have proper attributes. */
4646 cplus_decl_attributes (&decl
, attributes
, flags
);
4648 /* Dllimported symbols cannot be defined. Static data members (which
4649 can be initialized in-class and dllimported) go through grokfield,
4650 not here, so we don't need to exclude those decls when checking for
4652 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4654 error ("definition of %q#D is marked %<dllimport%>", decl
);
4655 DECL_DLLIMPORT_P (decl
) = 0;
4658 /* If #pragma weak was used, mark the decl weak now. */
4659 if (!processing_template_decl
)
4660 maybe_apply_pragma_weak (decl
);
4662 if (TREE_CODE (decl
) == FUNCTION_DECL
4663 && DECL_DECLARED_INLINE_P (decl
)
4664 && DECL_UNINLINABLE (decl
)
4665 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4666 warning (0, "inline function %q+D given attribute noinline", decl
);
4668 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4670 bool this_tmpl
= (processing_template_decl
4671 > template_class_depth (context
));
4674 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4675 if (field
== NULL_TREE
4676 || !(VAR_P (field
) || variable_template_p (field
)))
4677 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4678 else if (variable_template_p (field
) && !this_tmpl
)
4680 if (DECL_LANG_SPECIFIC (decl
)
4681 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4682 /* OK, specialization was already checked. */;
4685 error_at (DECL_SOURCE_LOCATION (decl
),
4686 "non-member-template declaration of %qD", decl
);
4687 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4688 "member template declaration here");
4689 return error_mark_node
;
4694 if (variable_template_p (field
))
4695 field
= DECL_TEMPLATE_RESULT (field
);
4697 if (DECL_CONTEXT (field
) != context
)
4699 if (!same_type_p (DECL_CONTEXT (field
), context
))
4700 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4701 "to be defined as %<%T::%D%>",
4702 DECL_CONTEXT (field
), DECL_NAME (decl
),
4703 context
, DECL_NAME (decl
));
4704 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4706 /* Static data member are tricky; an in-class initialization
4707 still doesn't provide a definition, so the in-class
4708 declaration will have DECL_EXTERNAL set, but will have an
4709 initialization. Thus, duplicate_decls won't warn
4710 about this situation, and so we check here. */
4711 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4712 error ("duplicate initialization of %qD", decl
);
4713 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4715 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4716 && !DECL_DECLARED_CONSTEXPR_P (field
))
4717 error ("%qD declared %<constexpr%> outside its class", field
);
4722 tree field
= check_classfn (context
, decl
,
4724 ? current_template_parms
4726 if (field
&& field
!= error_mark_node
4727 && duplicate_decls (decl
, field
,
4728 /*newdecl_is_friend=*/false))
4732 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4733 DECL_IN_AGGR_P (decl
) = 0;
4734 /* Do not mark DECL as an explicit specialization if it was not
4735 already marked as an instantiation; a declaration should
4736 never be marked as a specialization unless we know what
4737 template is being specialized. */
4738 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4740 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4741 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4742 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4743 && DECL_DECLARED_INLINE_P (decl
));
4745 DECL_COMDAT (decl
) = false;
4747 /* [temp.expl.spec] An explicit specialization of a static data
4748 member of a template is a definition if the declaration
4749 includes an initializer; otherwise, it is a declaration.
4751 We check for processing_specialization so this only applies
4752 to the new specialization syntax. */
4753 if (!initialized
&& processing_specialization
)
4754 DECL_EXTERNAL (decl
) = 1;
4757 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4758 /* Aliases are definitions. */
4760 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4764 was_public
= TREE_PUBLIC (decl
);
4766 /* Enter this declaration into the symbol table. */
4767 decl
= maybe_push_decl (decl
);
4769 if (processing_template_decl
)
4770 decl
= push_template_decl (decl
);
4771 if (decl
== error_mark_node
)
4772 return error_mark_node
;
4775 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4776 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4778 /* This is a const variable with implicit 'static'. Set
4779 DECL_THIS_STATIC so we can tell it from variables that are
4780 !TREE_PUBLIC because of the anonymous namespace. */
4781 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4782 DECL_THIS_STATIC (decl
) = 1;
4785 if (current_function_decl
&& VAR_P (decl
)
4786 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4789 if (DECL_THREAD_LOCAL_P (decl
))
4790 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4792 else if (TREE_STATIC (decl
))
4793 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4797 cp_function_chain
->invalid_constexpr
= true;
4800 if (!processing_template_decl
&& VAR_P (decl
))
4801 start_decl_1 (decl
, initialized
);
4806 /* Process the declaration of a variable DECL. INITIALIZED is true
4807 iff DECL is explicitly initialized. (INITIALIZED is false if the
4808 variable is initialized via an implicitly-called constructor.)
4809 This function must be called for ordinary variables (including, for
4810 example, implicit instantiations of templates), but must not be
4811 called for template declarations. */
4814 start_decl_1 (tree decl
, bool initialized
)
4818 bool aggregate_definition_p
;
4820 gcc_assert (!processing_template_decl
);
4822 if (error_operand_p (decl
))
4825 gcc_assert (VAR_P (decl
));
4827 type
= TREE_TYPE (decl
);
4828 complete_p
= COMPLETE_TYPE_P (type
);
4829 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4831 /* If an explicit initializer is present, or if this is a definition
4832 of an aggregate, then we need a complete type at this point.
4833 (Scalars are always complete types, so there is nothing to
4834 check.) This code just sets COMPLETE_P; errors (if necessary)
4835 are issued below. */
4836 if ((initialized
|| aggregate_definition_p
)
4838 && COMPLETE_TYPE_P (complete_type (type
)))
4841 /* We will not yet have set TREE_READONLY on DECL if the type
4842 was "const", but incomplete, before this point. But, now, we
4843 have a complete type, so we can try again. */
4844 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4848 /* Is it valid for this decl to have an initializer at all? */
4850 /* Don't allow initializations for incomplete types except for
4851 arrays which might be completed by the initialization. */
4853 ; /* A complete type is ok. */
4854 else if (type_uses_auto (type
))
4855 ; /* An auto type is ok. */
4856 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4858 error ("variable %q#D has initializer but incomplete type", decl
);
4859 type
= TREE_TYPE (decl
) = error_mark_node
;
4861 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4863 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4864 error ("elements of array %q#D have incomplete type", decl
);
4865 /* else we already gave an error in start_decl. */
4868 else if (aggregate_definition_p
&& !complete_p
)
4870 if (type_uses_auto (type
))
4871 error ("declaration of %q#D has no initializer", decl
);
4873 error ("aggregate %q#D has incomplete type and cannot be defined",
4875 /* Change the type so that assemble_variable will give
4876 DECL an rtl we can live with: (mem (const_int 0)). */
4877 type
= TREE_TYPE (decl
) = error_mark_node
;
4880 /* Create a new scope to hold this declaration if necessary.
4881 Whether or not a new scope is necessary cannot be determined
4882 until after the type has been completed; if the type is a
4883 specialization of a class template it is not until after
4884 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4885 will be set correctly. */
4886 maybe_push_cleanup_level (type
);
4889 /* Handle initialization of references. DECL, TYPE, and INIT have the
4890 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4891 but will be set to a new CLEANUP_STMT if a temporary is created
4892 that must be destroyed subsequently.
4894 Returns an initializer expression to use to initialize DECL, or
4895 NULL if the initialization can be performed statically.
4897 Quotes on semantics can be found in ARM 8.4.3. */
4900 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4902 if (init
== NULL_TREE
)
4904 if ((DECL_LANG_SPECIFIC (decl
) == 0
4905 || DECL_IN_AGGR_P (decl
) == 0)
4906 && ! DECL_THIS_EXTERN (decl
))
4907 error ("%qD declared as reference but not initialized", decl
);
4911 if (TREE_CODE (init
) == TREE_LIST
)
4912 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4913 tf_warning_or_error
);
4915 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4916 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4917 /* Note: default conversion is only called in very special cases. */
4918 init
= decay_conversion (init
, tf_warning_or_error
);
4920 /* Convert INIT to the reference type TYPE. This may involve the
4921 creation of a temporary, whose lifetime must be the same as that
4922 of the reference. If so, a DECL_EXPR for the temporary will be
4923 added just after the DECL_EXPR for DECL. That's why we don't set
4924 DECL_INITIAL for local references (instead assigning to them
4925 explicitly); we need to allow the temporary to be initialized
4927 return initialize_reference (type
, init
, flags
,
4928 tf_warning_or_error
);
4931 /* Designated initializers in arrays are not supported in GNU C++.
4932 The parser cannot detect this error since it does not know whether
4933 a given brace-enclosed initializer is for a class type or for an
4934 array. This function checks that CE does not use a designated
4935 initializer. If it does, an error is issued. Returns true if CE
4936 is valid, i.e., does not have a designated initializer. */
4939 check_array_designated_initializer (constructor_elt
*ce
,
4940 unsigned HOST_WIDE_INT index
)
4942 /* Designated initializers for array elements are not supported. */
4945 /* The parser only allows identifiers as designated
4947 if (ce
->index
== error_mark_node
)
4949 error ("name used in a GNU-style designated "
4950 "initializer for an array");
4953 else if (identifier_p (ce
->index
))
4955 error ("name %qD used in a GNU-style designated "
4956 "initializer for an array", ce
->index
);
4960 ce
->index
= cxx_constant_value (ce
->index
);
4962 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4964 /* A C99 designator is OK if it matches the current index. */
4965 if (wi::eq_p (ce
->index
, index
))
4968 sorry ("non-trivial designated initializers not supported");
4979 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4980 array until we finish parsing the initializer. If that's the
4981 situation we're in, update DECL accordingly. */
4984 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4986 tree type
= TREE_TYPE (decl
);
4988 if (TREE_CODE (type
) == ARRAY_TYPE
4989 && TYPE_DOMAIN (type
) == NULL_TREE
4990 && TREE_CODE (decl
) != TYPE_DECL
)
4992 /* do_default is really a C-ism to deal with tentative definitions.
4993 But let's leave it here to ease the eventual merge. */
4994 int do_default
= !DECL_EXTERNAL (decl
);
4995 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4998 /* Check that there are no designated initializers in INIT, as
4999 those are not supported in GNU C++, and as the middle-end
5000 will crash if presented with a non-numeric designated
5002 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5004 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5005 constructor_elt
*ce
;
5007 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5008 if (!check_array_designated_initializer (ce
, i
))
5014 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5018 error ("initializer fails to determine size of %qD", decl
);
5020 else if (failure
== 2)
5024 error ("array size missing in %qD", decl
);
5026 /* If a `static' var's size isn't known, make it extern as
5027 well as static, so it does not get allocated. If it's not
5028 `static', then don't mark it extern; finish_incomplete_decl
5029 will give it a default size and it will get allocated. */
5030 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5031 DECL_EXTERNAL (decl
) = 1;
5033 else if (failure
== 3)
5035 error ("zero-size array %qD", decl
);
5039 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5041 relayout_decl (decl
);
5045 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5046 any appropriate error messages regarding the layout. */
5049 layout_var_decl (tree decl
)
5053 type
= TREE_TYPE (decl
);
5054 if (type
== error_mark_node
)
5057 /* If we haven't already laid out this declaration, do so now.
5058 Note that we must not call complete type for an external object
5059 because it's type might involve templates that we are not
5060 supposed to instantiate yet. (And it's perfectly valid to say
5061 `extern X x' for some incomplete type `X'.) */
5062 if (!DECL_EXTERNAL (decl
))
5063 complete_type (type
);
5064 if (!DECL_SIZE (decl
)
5065 && TREE_TYPE (decl
) != error_mark_node
5066 && (COMPLETE_TYPE_P (type
)
5067 || (TREE_CODE (type
) == ARRAY_TYPE
5068 && !TYPE_DOMAIN (type
)
5069 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5070 layout_decl (decl
, 0);
5072 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5074 /* An automatic variable with an incomplete type: that is an error.
5075 Don't talk about array types here, since we took care of that
5076 message in grokdeclarator. */
5077 error ("storage size of %qD isn%'t known", decl
);
5078 TREE_TYPE (decl
) = error_mark_node
;
5081 /* Keep this code around in case we later want to control debug info
5082 based on whether a type is "used". (jason 1999-11-11) */
5084 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5085 /* Let debugger know it should output info for this type. */
5086 note_debug_info_needed (ttype
);
5088 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5089 note_debug_info_needed (DECL_CONTEXT (decl
));
5092 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5093 && DECL_SIZE (decl
) != NULL_TREE
5094 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5096 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5097 constant_expression_warning (DECL_SIZE (decl
));
5100 error ("storage size of %qD isn%'t constant", decl
);
5101 TREE_TYPE (decl
) = error_mark_node
;
5106 /* If a local static variable is declared in an inline function, or if
5107 we have a weak definition, we must endeavor to create only one
5108 instance of the variable at link-time. */
5111 maybe_commonize_var (tree decl
)
5113 /* Static data in a function with comdat linkage also has comdat
5115 if (TREE_STATIC (decl
)
5116 /* Don't mess with __FUNCTION__. */
5117 && ! DECL_ARTIFICIAL (decl
)
5118 && DECL_FUNCTION_SCOPE_P (decl
)
5119 && vague_linkage_p (DECL_CONTEXT (decl
)))
5123 /* With weak symbols, we simply make the variable COMDAT;
5124 that will cause copies in multiple translations units to
5126 comdat_linkage (decl
);
5130 if (DECL_INITIAL (decl
) == NULL_TREE
5131 || DECL_INITIAL (decl
) == error_mark_node
)
5133 /* Without weak symbols, we can use COMMON to merge
5134 uninitialized variables. */
5135 TREE_PUBLIC (decl
) = 1;
5136 DECL_COMMON (decl
) = 1;
5140 /* While for initialized variables, we must use internal
5141 linkage -- which means that multiple copies will not
5143 TREE_PUBLIC (decl
) = 0;
5144 DECL_COMMON (decl
) = 0;
5145 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5146 "sorry: semantics of inline function static "
5147 "data %q#D are wrong (you%'ll wind up "
5148 "with multiple copies)", decl
))
5149 inform (DECL_SOURCE_LOCATION (decl
),
5150 "you can work around this by removing the initializer");
5156 /* Issue an error message if DECL is an uninitialized const variable. */
5159 check_for_uninitialized_const_var (tree decl
)
5161 tree type
= strip_array_types (TREE_TYPE (decl
));
5163 /* ``Unless explicitly declared extern, a const object does not have
5164 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5167 && TREE_CODE (type
) != REFERENCE_TYPE
5168 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5169 && !DECL_INITIAL (decl
))
5171 tree field
= default_init_uninitialized_part (type
);
5175 if (CP_TYPE_CONST_P (type
))
5176 permerror (DECL_SOURCE_LOCATION (decl
),
5177 "uninitialized const %qD", decl
);
5180 error_at (DECL_SOURCE_LOCATION (decl
),
5181 "uninitialized variable %qD in %<constexpr%> function",
5183 cp_function_chain
->invalid_constexpr
= true;
5186 if (CLASS_TYPE_P (type
))
5188 tree defaulted_ctor
;
5190 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5191 "%q#T has no user-provided default constructor", type
);
5192 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5194 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5195 "constructor is not user-provided because it is "
5196 "explicitly defaulted in the class body");
5197 inform (0, "and the implicitly-defined constructor does not "
5198 "initialize %q+#D", field
);
5203 /* Structure holding the current initializer being processed by reshape_init.
5204 CUR is a pointer to the current element being processed, END is a pointer
5205 after the last element present in the initializer. */
5206 typedef struct reshape_iterator_t
5208 constructor_elt
*cur
;
5209 constructor_elt
*end
;
5212 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5214 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5215 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5216 initialized. If there are no more such fields, the return value
5220 next_initializable_field (tree field
)
5223 && (TREE_CODE (field
) != FIELD_DECL
5224 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5225 || DECL_ARTIFICIAL (field
)))
5226 field
= DECL_CHAIN (field
);
5231 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5232 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5233 INTEGER_CST representing the size of the array minus one (the maximum index),
5234 or NULL_TREE if the array was declared without specifying the size. D is
5235 the iterator within the constructor. */
5238 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5239 tsubst_flags_t complain
)
5242 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5243 unsigned HOST_WIDE_INT max_index_cst
= 0;
5244 unsigned HOST_WIDE_INT index
;
5246 /* The initializer for an array is always a CONSTRUCTOR. */
5247 new_init
= build_constructor (init_list_type_node
, NULL
);
5251 /* Minus 1 is used for zero sized arrays. */
5252 if (integer_all_onesp (max_index
))
5255 if (tree_fits_uhwi_p (max_index
))
5256 max_index_cst
= tree_to_uhwi (max_index
);
5257 /* sizetype is sign extended, not zero extended. */
5259 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5262 /* Loop until there are no more initializers. */
5264 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5268 constructor_elt
*old_cur
= d
->cur
;
5270 check_array_designated_initializer (d
->cur
, index
);
5271 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5273 if (elt_init
== error_mark_node
)
5274 return error_mark_node
;
5275 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5276 size_int (index
), elt_init
);
5277 if (!TREE_CONSTANT (elt_init
))
5278 TREE_CONSTANT (new_init
) = false;
5280 /* This can happen with an invalid initializer (c++/54501). */
5281 if (d
->cur
== old_cur
&& !sized_array_p
)
5288 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5289 Parameters are the same of reshape_init_r. */
5292 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5294 tree max_index
= NULL_TREE
;
5296 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5298 if (TYPE_DOMAIN (type
))
5299 max_index
= array_type_nelts (type
);
5301 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5304 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5305 Parameters are the same of reshape_init_r. */
5308 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5310 tree max_index
= NULL_TREE
;
5312 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5314 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5316 tree value
= d
->cur
->value
;
5317 if (!same_type_p (TREE_TYPE (value
), type
))
5319 if (complain
& tf_error
)
5320 error ("invalid type %qT as initializer for a vector of type %qT",
5321 TREE_TYPE (d
->cur
->value
), type
);
5322 value
= error_mark_node
;
5328 /* For a vector, we initialize it as an array of the appropriate size. */
5329 if (TREE_CODE (type
) == VECTOR_TYPE
)
5330 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5332 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5335 /* Subroutine of reshape_init_r, processes the initializers for classes
5336 or union. Parameters are the same of reshape_init_r. */
5339 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5340 tsubst_flags_t complain
)
5345 gcc_assert (CLASS_TYPE_P (type
));
5347 /* The initializer for a class is always a CONSTRUCTOR. */
5348 new_init
= build_constructor (init_list_type_node
, NULL
);
5349 field
= next_initializable_field (TYPE_FIELDS (type
));
5355 An initializer for an aggregate member that is an
5356 empty class shall have the form of an empty
5357 initializer-list {}. */
5358 if (!first_initializer_p
)
5360 if (complain
& tf_error
)
5361 error ("initializer for %qT must be brace-enclosed", type
);
5362 return error_mark_node
;
5367 /* Loop through the initializable fields, gathering initializers. */
5368 while (d
->cur
!= d
->end
)
5371 constructor_elt
*old_cur
= d
->cur
;
5373 /* Handle designated initializers, as an extension. */
5376 if (d
->cur
->index
== error_mark_node
)
5377 return error_mark_node
;
5379 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5380 /* We already reshaped this. */
5381 gcc_assert (d
->cur
->index
== field
);
5382 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5383 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5386 if (complain
& tf_error
)
5387 error ("%<[%E] =%> used in a GNU-style designated initializer"
5388 " for class %qT", d
->cur
->index
, type
);
5389 return error_mark_node
;
5392 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5394 if (complain
& tf_error
)
5395 error ("%qT has no non-static data member named %qD", type
,
5397 return error_mark_node
;
5401 /* If we processed all the member of the class, we are done. */
5405 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5406 /*first_initializer_p=*/false, complain
);
5407 if (field_init
== error_mark_node
)
5408 return error_mark_node
;
5410 if (d
->cur
== old_cur
&& d
->cur
->index
)
5412 /* This can happen with an invalid initializer for a flexible
5413 array member (c++/54441). */
5414 if (complain
& tf_error
)
5415 error ("invalid initializer for %q#D", field
);
5416 return error_mark_node
;
5419 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5423 When a union is initialized with a brace-enclosed
5424 initializer, the braces shall only contain an
5425 initializer for the first member of the union. */
5426 if (TREE_CODE (type
) == UNION_TYPE
)
5429 field
= next_initializable_field (DECL_CHAIN (field
));
5435 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5436 designators are not valid; either complain or return true to indicate
5437 that reshape_init_r should return error_mark_node. */
5440 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5444 if (complain
& tf_error
)
5445 error ("C99 designator %qE outside aggregate initializer",
5453 /* Subroutine of reshape_init, which processes a single initializer (part of
5454 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5455 iterator within the CONSTRUCTOR which points to the initializer to process.
5456 FIRST_INITIALIZER_P is true if this is the first initializer of the
5457 outermost CONSTRUCTOR node. */
5460 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5461 tsubst_flags_t complain
)
5463 tree init
= d
->cur
->value
;
5465 if (error_operand_p (init
))
5466 return error_mark_node
;
5468 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5469 && has_designator_problem (d
, complain
))
5470 return error_mark_node
;
5472 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5474 /* A complex type can be initialized from one or two initializers,
5475 but braces are not elided. */
5477 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5479 if (CONSTRUCTOR_NELTS (init
) > 2)
5481 if (complain
& tf_error
)
5482 error ("too many initializers for %qT", type
);
5484 return error_mark_node
;
5487 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5489 vec
<constructor_elt
, va_gc
> *v
= 0;
5490 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5491 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5492 if (has_designator_problem (d
, complain
))
5493 return error_mark_node
;
5495 init
= build_constructor (init_list_type_node
, v
);
5500 /* A non-aggregate type is always initialized with a single
5502 if (!CP_AGGREGATE_TYPE_P (type
))
5504 /* It is invalid to initialize a non-aggregate type with a
5505 brace-enclosed initializer before C++0x.
5506 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5507 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5508 a CONSTRUCTOR (with a record type). */
5509 if (TREE_CODE (init
) == CONSTRUCTOR
5510 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5512 if (SCALAR_TYPE_P (type
))
5514 if (cxx_dialect
< cxx11
5515 /* Isn't value-initialization. */
5516 || CONSTRUCTOR_NELTS (init
) > 0)
5518 if (complain
& tf_error
)
5519 error ("braces around scalar initializer for type %qT",
5521 init
= error_mark_node
;
5525 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5532 /* "If T is a class type and the initializer list has a single element of
5533 type cv U, where U is T or a class derived from T, the object is
5534 initialized from that element." Even if T is an aggregate. */
5535 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5536 && first_initializer_p
5537 && d
->end
- d
->cur
== 1
5538 && reference_related_p (type
, TREE_TYPE (init
)))
5546 All implicit type conversions (clause _conv_) are considered when
5547 initializing the aggregate member with an initializer from an
5548 initializer-list. If the initializer can initialize a member,
5549 the member is initialized. Otherwise, if the member is itself a
5550 non-empty subaggregate, brace elision is assumed and the
5551 initializer is considered for the initialization of the first
5552 member of the subaggregate. */
5553 if (TREE_CODE (init
) != CONSTRUCTOR
5554 /* But don't try this for the first initializer, since that would be
5555 looking through the outermost braces; A a2 = { a1 }; is not a
5556 valid aggregate initialization. */
5557 && !first_initializer_p
5558 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5559 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5566 /* [dcl.init.string]
5568 A char array (whether plain char, signed char, or unsigned char)
5569 can be initialized by a string-literal (optionally enclosed in
5570 braces); a wchar_t array can be initialized by a wide
5571 string-literal (optionally enclosed in braces). */
5572 if (TREE_CODE (type
) == ARRAY_TYPE
5573 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5575 tree str_init
= init
;
5577 /* Strip one level of braces if and only if they enclose a single
5578 element (as allowed by [dcl.init.string]). */
5579 if (!first_initializer_p
5580 && TREE_CODE (str_init
) == CONSTRUCTOR
5581 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5583 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5586 /* If it's a string literal, then it's the initializer for the array
5587 as a whole. Otherwise, continue with normal initialization for
5588 array types (one value per array element). */
5589 if (TREE_CODE (str_init
) == STRING_CST
)
5591 if (has_designator_problem (d
, complain
))
5592 return error_mark_node
;
5598 /* The following cases are about aggregates. If we are not within a full
5599 initializer already, and there is not a CONSTRUCTOR, it means that there
5600 is a missing set of braces (that is, we are processing the case for
5601 which reshape_init exists). */
5602 if (!first_initializer_p
)
5604 if (TREE_CODE (init
) == CONSTRUCTOR
)
5606 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5607 /* There is no need to reshape pointer-to-member function
5608 initializers, as they are always constructed correctly
5609 by the front end. */
5611 else if (COMPOUND_LITERAL_P (init
))
5612 /* For a nested compound literal, there is no need to reshape since
5613 brace elision is not allowed. Even if we decided to allow it,
5614 we should add a call to reshape_init in finish_compound_literal,
5615 before calling digest_init, so changing this code would still
5616 not be necessary. */
5617 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5621 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5622 return reshape_init (type
, init
, complain
);
5626 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5630 /* Dispatch to specialized routines. */
5631 if (CLASS_TYPE_P (type
))
5632 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5633 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5634 return reshape_init_array (type
, d
, complain
);
5635 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5636 return reshape_init_vector (type
, d
, complain
);
5641 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5642 brace-enclosed aggregate initializer.
5644 INIT is the CONSTRUCTOR containing the list of initializers describing
5645 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5646 It may not presently match the shape of the TYPE; for example:
5648 struct S { int a; int b; };
5649 struct S a[] = { 1, 2, 3, 4 };
5651 Here INIT will hold a vector of four elements, rather than a
5652 vector of two elements, each itself a vector of two elements. This
5653 routine transforms INIT from the former form into the latter. The
5654 revised CONSTRUCTOR node is returned. */
5657 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5659 vec
<constructor_elt
, va_gc
> *v
;
5663 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5665 v
= CONSTRUCTOR_ELTS (init
);
5667 /* An empty constructor does not need reshaping, and it is always a valid
5669 if (vec_safe_is_empty (v
))
5672 /* Recurse on this CONSTRUCTOR. */
5674 d
.end
= d
.cur
+ v
->length ();
5676 new_init
= reshape_init_r (type
, &d
, true, complain
);
5677 if (new_init
== error_mark_node
)
5678 return error_mark_node
;
5680 /* Make sure all the element of the constructor were used. Otherwise,
5681 issue an error about exceeding initializers. */
5684 if (complain
& tf_error
)
5685 error ("too many initializers for %qT", type
);
5687 return error_mark_node
;
5693 /* Verify array initializer. Returns true if errors have been reported. */
5696 check_array_initializer (tree decl
, tree type
, tree init
)
5698 tree element_type
= TREE_TYPE (type
);
5700 /* The array type itself need not be complete, because the
5701 initializer may tell us how many elements are in the array.
5702 But, the elements of the array must be complete. */
5703 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5706 error ("elements of array %q#D have incomplete type", decl
);
5708 error ("elements of array %q#T have incomplete type", type
);
5711 /* A compound literal can't have variable size. */
5713 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5714 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5716 error ("variable-sized compound literal");
5722 /* Subroutine of check_initializer; args are passed down from that function.
5723 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5726 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5729 gcc_assert (stmts_are_full_exprs_p ());
5730 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5733 /* Verify INIT (the initializer for DECL), and record the
5734 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5735 grok_reference_init.
5737 If the return value is non-NULL, it is an expression that must be
5738 evaluated dynamically to initialize DECL. */
5741 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5743 tree type
= TREE_TYPE (decl
);
5744 tree init_code
= NULL
;
5747 /* Things that are going to be initialized need to have complete
5749 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5751 if (DECL_HAS_VALUE_EXPR_P (decl
))
5753 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5754 it doesn't have storage to be initialized. */
5755 gcc_assert (init
== NULL_TREE
);
5759 if (type
== error_mark_node
)
5760 /* We will have already complained. */
5763 if (TREE_CODE (type
) == ARRAY_TYPE
)
5765 if (check_array_initializer (decl
, type
, init
))
5768 else if (!COMPLETE_TYPE_P (type
))
5770 error ("%q#D has incomplete type", decl
);
5771 TREE_TYPE (decl
) = error_mark_node
;
5775 /* There is no way to make a variable-sized class type in GNU C++. */
5776 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5778 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5780 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5781 if (SCALAR_TYPE_P (type
))
5785 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5786 init
= build_zero_init (type
, NULL_TREE
, false);
5788 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5790 error ("scalar object %qD requires one element in initializer",
5792 TREE_TYPE (decl
) = error_mark_node
;
5798 if (TREE_CODE (decl
) == CONST_DECL
)
5800 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5802 DECL_INITIAL (decl
) = init
;
5804 gcc_assert (init
!= NULL_TREE
);
5807 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5809 else if (init
|| type_build_ctor_call (type
)
5810 || TREE_CODE (type
) == REFERENCE_TYPE
)
5812 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5814 init
= grok_reference_init (decl
, type
, init
, flags
);
5815 flags
|= LOOKUP_ALREADY_DIGESTED
;
5818 check_for_uninitialized_const_var (decl
);
5819 /* Do not reshape constructors of vectors (they don't need to be
5821 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5823 if (is_std_init_list (type
))
5825 init
= perform_implicit_conversion (type
, init
,
5826 tf_warning_or_error
);
5827 flags
|= LOOKUP_ALREADY_DIGESTED
;
5829 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5831 /* Don't reshape if the class has constructors. */
5832 if (cxx_dialect
== cxx98
)
5833 error ("in C++98 %qD must be initialized by constructor, "
5837 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5839 error ("opaque vector types cannot be initialized");
5840 init
= error_mark_node
;
5844 init
= reshape_init (type
, init
, tf_warning_or_error
);
5845 flags
|= LOOKUP_NO_NARROWING
;
5848 else if (TREE_CODE (init
) == TREE_LIST
5849 && TREE_TYPE (init
) != unknown_type_node
5850 && !MAYBE_CLASS_TYPE_P (type
))
5852 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5854 /* We get here with code like `int a (2);' */
5855 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5856 tf_warning_or_error
);
5859 /* If DECL has an array type without a specific bound, deduce the
5860 array size from the initializer. */
5861 maybe_deduce_size_from_array_init (decl
, init
);
5862 type
= TREE_TYPE (decl
);
5863 if (type
== error_mark_node
)
5866 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5867 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5868 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5869 && CP_AGGREGATE_TYPE_P (type
)
5870 && (CLASS_TYPE_P (type
)
5871 || !TYPE_NEEDS_CONSTRUCTING (type
)
5872 || type_has_extended_temps (type
))))
5874 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5876 /* A constructor call is a non-trivial initializer even if
5877 it isn't explicitly written. */
5878 if (TREE_SIDE_EFFECTS (init_code
))
5879 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5881 /* If this is a constexpr initializer, expand_default_init will
5882 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5883 case, pull the initializer back out and pass it down into
5884 store_init_value. */
5885 while (TREE_CODE (init_code
) == EXPR_STMT
5886 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5887 init_code
= TREE_OPERAND (init_code
, 0);
5888 if (TREE_CODE (init_code
) == INIT_EXPR
)
5890 init
= TREE_OPERAND (init_code
, 1);
5891 init_code
= NULL_TREE
;
5892 /* Don't call digest_init; it's unnecessary and will complain
5893 about aggregate initialization of non-aggregate classes. */
5894 flags
|= LOOKUP_ALREADY_DIGESTED
;
5896 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5898 /* Declared constexpr, but no suitable initializer; massage
5899 init appropriately so we can pass it into store_init_value
5901 if (CLASS_TYPE_P (type
)
5902 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5904 init
= build_functional_cast (type
, init
, tf_none
);
5905 if (TREE_CODE (init
) == TARGET_EXPR
)
5906 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5908 init_code
= NULL_TREE
;
5914 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5916 /* In aggregate initialization of a variable, each element
5917 initialization is a full-expression because there is no
5918 enclosing expression. */
5919 gcc_assert (stmts_are_full_exprs_p ());
5921 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5923 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5924 && DECL_INITIAL (decl
)
5925 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5926 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5927 warning (0, "array %qD initialized by parenthesized string literal %qE",
5928 decl
, DECL_INITIAL (decl
));
5934 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5935 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5936 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5937 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5940 check_for_uninitialized_const_var (decl
);
5943 if (init
&& init
!= error_mark_node
)
5944 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5948 /* We might have set these in cp_finish_decl. */
5949 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
5950 TREE_CONSTANT (decl
) = false;
5953 if (init_code
&& DECL_IN_AGGR_P (decl
))
5955 static int explained
= 0;
5957 if (cxx_dialect
< cxx11
)
5958 error ("initializer invalid for static member with constructor");
5960 error ("non-constant in-class initialization invalid for static "
5961 "member %qD", decl
);
5964 inform (input_location
,
5965 "(an out of class initialization is required)");
5974 /* If DECL is not a local variable, give it RTL. */
5977 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5979 int toplev
= toplevel_bindings_p ();
5981 const char *filename
;
5983 /* Set the DECL_ASSEMBLER_NAME for the object. */
5986 /* The `register' keyword, when used together with an
5987 asm-specification, indicates that the variable should be
5988 placed in a particular register. */
5989 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5991 set_user_assembler_name (decl
, asmspec
);
5992 DECL_HARD_REGISTER (decl
) = 1;
5996 if (TREE_CODE (decl
) == FUNCTION_DECL
5997 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5998 set_builtin_user_assembler_name (decl
, asmspec
);
5999 set_user_assembler_name (decl
, asmspec
);
6003 /* Handle non-variables up front. */
6006 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6010 /* If we see a class member here, it should be a static data
6012 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6014 gcc_assert (TREE_STATIC (decl
));
6015 /* An in-class declaration of a static data member should be
6016 external; it is only a declaration, and not a definition. */
6017 if (init
== NULL_TREE
)
6018 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6021 /* We don't create any RTL for local variables. */
6022 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6025 /* We defer emission of local statics until the corresponding
6026 DECL_EXPR is expanded. */
6027 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6029 /* We try to defer namespace-scope static constants so that they are
6030 not emitted into the object file unnecessarily. */
6031 filename
= LOCATION_FILE (input_location
);
6032 if (!DECL_VIRTUAL_P (decl
)
6033 && TREE_READONLY (decl
)
6034 && DECL_INITIAL (decl
) != NULL_TREE
6035 && DECL_INITIAL (decl
) != error_mark_node
6037 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
6039 && !TREE_PUBLIC (decl
))
6041 /* Fool with the linkage of static consts according to #pragma
6043 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
6044 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
6046 TREE_PUBLIC (decl
) = 1;
6047 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
6052 /* Likewise for template instantiations. */
6053 else if (DECL_LANG_SPECIFIC (decl
)
6054 && DECL_IMPLICIT_INSTANTIATION (decl
))
6057 /* If we're not deferring, go ahead and assemble the variable. */
6059 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6062 /* walk_tree helper for wrap_temporary_cleanups, below. */
6065 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6067 /* Stop at types or full-expression boundaries. */
6068 if (TYPE_P (*stmt_p
)
6069 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6075 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6077 tree guard
= (tree
)data
;
6078 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6080 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6081 /* Tell honor_protect_cleanup_actions to handle this as a separate
6083 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6085 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6091 /* We're initializing a local variable which has a cleanup GUARD. If there
6092 are any temporaries used in the initializer INIT of this variable, we
6093 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6094 variable will be cleaned up properly if one of them throws.
6096 Unfortunately, there's no way to express this properly in terms of
6097 nesting, as the regions for the temporaries overlap the region for the
6098 variable itself; if there are two temporaries, the variable needs to be
6099 the first thing destroyed if either of them throws. However, we only
6100 want to run the variable's cleanup if it actually got constructed. So
6101 we need to guard the temporary cleanups with the variable's cleanup if
6102 they are run on the normal path, but not if they are run on the
6103 exceptional path. We implement this by telling
6104 honor_protect_cleanup_actions to strip the variable cleanup from the
6105 exceptional path. */
6108 wrap_temporary_cleanups (tree init
, tree guard
)
6110 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6113 /* Generate code to initialize DECL (a local variable). */
6116 initialize_local_var (tree decl
, tree init
)
6118 tree type
= TREE_TYPE (decl
);
6122 gcc_assert (VAR_P (decl
)
6123 || TREE_CODE (decl
) == RESULT_DECL
);
6124 gcc_assert (!TREE_STATIC (decl
));
6126 if (DECL_SIZE (decl
) == NULL_TREE
)
6128 /* If we used it already as memory, it must stay in memory. */
6129 DECL_INITIAL (decl
) = NULL_TREE
;
6130 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6134 if (type
== error_mark_node
)
6137 /* Compute and store the initial value. */
6138 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6139 if (TREE_USED (type
))
6140 DECL_READ_P (decl
) = 1;
6142 /* Generate a cleanup, if necessary. */
6143 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6145 /* Perform the initialization. */
6148 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6149 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6150 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6152 /* Stick simple initializers in DECL_INITIAL so that
6153 -Wno-init-self works (c++/34772). */
6154 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6155 DECL_INITIAL (decl
) = rinit
;
6157 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6161 warning_at (DECL_SOURCE_LOCATION (decl
),
6163 "reference %qD is initialized with itself", decl
);
6168 int saved_stmts_are_full_exprs_p
;
6170 /* If we're only initializing a single object, guard the
6171 destructors of any temporaries used in its initializer with
6172 its destructor. This isn't right for arrays because each
6173 element initialization is a full-expression. */
6174 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6175 wrap_temporary_cleanups (init
, cleanup
);
6177 gcc_assert (building_stmt_list_p ());
6178 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6179 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6180 finish_expr_stmt (init
);
6181 current_stmt_tree ()->stmts_are_full_exprs_p
=
6182 saved_stmts_are_full_exprs_p
;
6186 /* Set this to 0 so we can tell whether an aggregate which was
6187 initialized was ever used. Don't do this if it has a
6188 destructor, so we don't complain about the 'resource
6189 allocation is initialization' idiom. Now set
6190 attribute((unused)) on types so decls of that type will be
6191 marked used. (see TREE_USED, above.) */
6192 if (TYPE_NEEDS_CONSTRUCTING (type
)
6194 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6195 && DECL_NAME (decl
))
6196 TREE_USED (decl
) = 0;
6197 else if (already_used
)
6198 TREE_USED (decl
) = 1;
6201 finish_decl_cleanup (decl
, cleanup
);
6204 /* DECL is a VAR_DECL for a compiler-generated variable with static
6205 storage duration (like a virtual table) whose initializer is a
6206 compile-time constant. Initialize the variable and provide it to the
6210 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6213 gcc_assert (DECL_ARTIFICIAL (decl
));
6214 init
= build_constructor (TREE_TYPE (decl
), v
);
6215 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6216 DECL_INITIAL (decl
) = init
;
6217 DECL_INITIALIZED_P (decl
) = 1;
6218 determine_visibility (decl
);
6219 layout_var_decl (decl
);
6220 maybe_commonize_var (decl
);
6221 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6224 /* INIT is the initializer for a variable, as represented by the
6225 parser. Returns true iff INIT is type-dependent. */
6228 type_dependent_init_p (tree init
)
6230 if (TREE_CODE (init
) == TREE_LIST
)
6231 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6232 return any_type_dependent_elements_p (init
);
6233 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6234 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6236 vec
<constructor_elt
, va_gc
> *elts
;
6240 elts
= CONSTRUCTOR_ELTS (init
);
6241 nelts
= vec_safe_length (elts
);
6242 for (i
= 0; i
< nelts
; ++i
)
6243 if (type_dependent_init_p ((*elts
)[i
].value
))
6247 /* It must be a simple expression, e.g., int i = 3; */
6248 return type_dependent_expression_p (init
);
6253 /* INIT is the initializer for a variable, as represented by the
6254 parser. Returns true iff INIT is value-dependent. */
6257 value_dependent_init_p (tree init
)
6259 if (TREE_CODE (init
) == TREE_LIST
)
6260 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6261 return any_value_dependent_elements_p (init
);
6262 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6263 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6265 vec
<constructor_elt
, va_gc
> *elts
;
6269 elts
= CONSTRUCTOR_ELTS (init
);
6270 nelts
= vec_safe_length (elts
);
6271 for (i
= 0; i
< nelts
; ++i
)
6272 if (value_dependent_init_p ((*elts
)[i
].value
))
6276 /* It must be a simple expression, e.g., int i = 3; */
6277 return value_dependent_expression_p (init
);
6282 /* Finish processing of a declaration;
6283 install its line number and initial value.
6284 If the length of an array type is not known before,
6285 it must be determined now, from the initial value, or it is an error.
6287 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6288 true, then INIT is an integral constant expression.
6290 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6291 if the (init) syntax was used. */
6294 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6295 tree asmspec_tree
, int flags
)
6298 vec
<tree
, va_gc
> *cleanups
= NULL
;
6299 const char *asmspec
= NULL
;
6300 int was_readonly
= 0;
6301 bool var_definition_p
= false;
6304 if (decl
== error_mark_node
)
6309 error ("assignment (not initialization) in declaration");
6313 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6314 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6315 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6317 type
= TREE_TYPE (decl
);
6318 if (type
== error_mark_node
)
6321 /* If a name was specified, get the string. */
6322 if (at_namespace_scope_p ())
6323 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6324 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6325 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6327 if (current_class_type
6328 && CP_DECL_CONTEXT (decl
) == current_class_type
6329 && TYPE_BEING_DEFINED (current_class_type
)
6330 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6331 && (DECL_INITIAL (decl
) || init
))
6332 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6334 if (TREE_CODE (decl
) != FUNCTION_DECL
6335 && (auto_node
= type_uses_auto (type
)))
6338 if (init
== NULL_TREE
)
6340 if (DECL_LANG_SPECIFIC (decl
)
6341 && DECL_TEMPLATE_INSTANTIATION (decl
)
6342 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6344 /* init is null because we're deferring instantiating the
6345 initializer until we need it. Well, we need it now. */
6346 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6350 error ("declaration of %q#D has no initializer", decl
);
6351 TREE_TYPE (decl
) = error_mark_node
;
6355 if (TREE_CODE (d_init
) == TREE_LIST
)
6356 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6357 tf_warning_or_error
);
6358 d_init
= resolve_nondeduced_context (d_init
);
6359 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6361 if (type
== error_mark_node
)
6363 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6366 if (!ensure_literal_type_for_constexpr_object (decl
))
6367 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6370 && DECL_CLASS_SCOPE_P (decl
)
6371 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6372 check_static_variable_definition (decl
, type
);
6374 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6377 if (init
== ridpointers
[(int)RID_DELETE
])
6379 /* FIXME check this is 1st decl. */
6380 DECL_DELETED_FN (decl
) = 1;
6381 DECL_DECLARED_INLINE_P (decl
) = 1;
6382 DECL_INITIAL (decl
) = error_mark_node
;
6383 FOR_EACH_CLONE (clone
, decl
)
6385 DECL_DELETED_FN (clone
) = 1;
6386 DECL_DECLARED_INLINE_P (clone
) = 1;
6387 DECL_INITIAL (clone
) = error_mark_node
;
6391 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6393 if (defaultable_fn_check (decl
))
6394 DECL_DEFAULTED_FN (decl
) = 1;
6396 DECL_INITIAL (decl
) = NULL_TREE
;
6400 if (init
&& VAR_P (decl
))
6402 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6403 /* If DECL is a reference, then we want to know whether init is a
6404 reference constant; init_const_expr_p as passed tells us whether
6405 it's an rvalue constant. */
6406 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6407 init_const_expr_p
= potential_constant_expression (init
);
6408 if (init_const_expr_p
)
6410 /* Set these flags now for templates. We'll update the flags in
6411 store_init_value for instantiations. */
6412 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6413 if (decl_maybe_constant_var_p (decl
))
6414 TREE_CONSTANT (decl
) = 1;
6418 if (processing_template_decl
)
6420 bool type_dependent_p
;
6422 /* Add this declaration to the statement-tree. */
6423 if (at_function_scope_p ())
6424 add_decl_expr (decl
);
6426 type_dependent_p
= dependent_type_p (type
);
6428 if (check_for_bare_parameter_packs (init
))
6431 DECL_INITIAL (decl
) = NULL_TREE
;
6434 /* Generally, initializers in templates are expanded when the
6435 template is instantiated. But, if DECL is a variable constant
6436 then it can be used in future constant expressions, so its value
6437 must be available. */
6439 if (!VAR_P (decl
) || dependent_type_p (type
))
6440 /* We can't do anything if the decl has dependent type. */;
6442 && init_const_expr_p
6443 && !type_dependent_p
6444 && TREE_CODE (type
) != REFERENCE_TYPE
6445 && decl_maybe_constant_var_p (decl
)
6446 && !type_dependent_init_p (init
)
6447 && !value_dependent_init_p (init
))
6449 /* This variable seems to be a non-dependent constant, so process
6450 its initializer. If check_initializer returns non-null the
6451 initialization wasn't constant after all. */
6453 cleanups
= make_tree_vector ();
6454 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6455 if (init_code
== NULL_TREE
)
6457 release_tree_vector (cleanups
);
6459 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6461 /* Deduce array size even if the initializer is dependent. */
6462 maybe_deduce_size_from_array_init (decl
, init
);
6463 /* And complain about multiple initializers. */
6464 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6465 && !MAYBE_CLASS_TYPE_P (type
))
6466 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6467 tf_warning_or_error
);
6471 DECL_INITIAL (decl
) = init
;
6475 /* Just store non-static data member initializers for later. */
6476 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6477 DECL_INITIAL (decl
) = init
;
6479 /* Take care of TYPE_DECLs up front. */
6480 if (TREE_CODE (decl
) == TYPE_DECL
)
6482 if (type
!= error_mark_node
6483 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6485 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6486 warning (0, "shadowing previous type declaration of %q#D", decl
);
6487 set_identifier_type_value (DECL_NAME (decl
), decl
);
6490 /* If we have installed this as the canonical typedef for this
6491 type, and that type has not been defined yet, delay emitting
6492 the debug information for it, as we will emit it later. */
6493 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6494 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6495 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6497 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6502 /* A reference will be modified here, as it is initialized. */
6503 if (! DECL_EXTERNAL (decl
)
6504 && TREE_READONLY (decl
)
6505 && TREE_CODE (type
) == REFERENCE_TYPE
)
6508 TREE_READONLY (decl
) = 0;
6513 /* If this is a local variable that will need a mangled name,
6514 register it now. We must do this before processing the
6515 initializer for the variable, since the initialization might
6516 require a guard variable, and since the mangled name of the
6517 guard variable will depend on the mangled name of this
6519 if (DECL_FUNCTION_SCOPE_P (decl
)
6520 && TREE_STATIC (decl
)
6521 && !DECL_ARTIFICIAL (decl
))
6523 push_local_name (decl
);
6524 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6525 || DECL_DESTRUCTOR_P (current_function_decl
))
6526 /* Normally local_decls is populated during GIMPLE lowering,
6527 but [cd]tors are never actually compiled directly. We need
6528 to put statics on the list so we can deal with the label
6529 address extension. FIXME. */
6530 add_local_decl (cfun
, decl
);
6533 /* Convert the initializer to the type of DECL, if we have not
6534 already initialized DECL. */
6535 if (!DECL_INITIALIZED_P (decl
)
6536 /* If !DECL_EXTERNAL then DECL is being defined. In the
6537 case of a static data member initialized inside the
6538 class-specifier, there can be an initializer even if DECL
6539 is *not* defined. */
6540 && (!DECL_EXTERNAL (decl
) || init
))
6542 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6545 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6546 /* Allow libjava/prims.cc define primitive classes. */
6547 if (init
!= NULL_TREE
6548 || jclass
== NULL_TREE
6549 || TREE_CODE (jclass
) != TYPE_DECL
6550 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6551 || !same_type_ignoring_top_level_qualifiers_p
6552 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6553 error ("Java object %qD not allocated with %<new%>", decl
);
6556 cleanups
= make_tree_vector ();
6557 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6563 The memory occupied by any object of static storage
6564 duration is zero-initialized at program startup before
6565 any other initialization takes place.
6567 We cannot create an appropriate initializer until after
6568 the type of DECL is finalized. If DECL_INITIAL is set,
6569 then the DECL is statically initialized, and any
6570 necessary zero-initialization has already been performed. */
6571 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6572 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6573 /*nelts=*/NULL_TREE
,
6574 /*static_storage_p=*/true);
6575 /* Remember that the initialization for this variable has
6577 DECL_INITIALIZED_P (decl
) = 1;
6578 /* This declaration is the definition of this variable,
6579 unless we are initializing a static data member within
6580 the class specifier. */
6581 if (!DECL_EXTERNAL (decl
))
6582 var_definition_p
= true;
6584 /* If the variable has an array type, lay out the type, even if
6585 there is no initializer. It is valid to index through the
6586 array, and we must get TYPE_ALIGN set correctly on the array
6588 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6591 if (TREE_STATIC (decl
)
6592 && !at_function_scope_p ()
6593 && current_function_decl
== NULL
)
6594 /* So decl is a global variable or a static member of a
6595 non local class. Record the types it uses
6596 so that we can decide later to emit debug info for them. */
6597 record_types_used_by_current_var_decl (decl
);
6599 else if (TREE_CODE (decl
) == FIELD_DECL
6600 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6601 error ("non-static data member %qD has Java class type", decl
);
6603 /* Add this declaration to the statement-tree. This needs to happen
6604 after the call to check_initializer so that the DECL_EXPR for a
6605 reference temp is added before the DECL_EXPR for the reference itself. */
6606 if (DECL_FUNCTION_SCOPE_P (decl
))
6608 /* If we're building a variable sized type, and we might be
6609 reachable other than via the top of the current binding
6610 level, then create a new BIND_EXPR so that we deallocate
6611 the object at the right time. */
6614 && !TREE_CONSTANT (DECL_SIZE (decl
))
6615 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6618 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6619 TREE_SIDE_EFFECTS (bind
) = 1;
6621 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6623 add_decl_expr (decl
);
6626 /* Let the middle end know about variables and functions -- but not
6627 static data members in uninstantiated class templates. */
6628 if (VAR_OR_FUNCTION_DECL_P (decl
))
6632 layout_var_decl (decl
);
6633 maybe_commonize_var (decl
);
6636 /* This needs to happen after the linkage is set. */
6637 determine_visibility (decl
);
6639 if (var_definition_p
&& TREE_STATIC (decl
))
6641 /* If a TREE_READONLY variable needs initialization
6642 at runtime, it is no longer readonly and we need to
6643 avoid MEM_READONLY_P being set on RTL created for it. */
6646 if (TREE_READONLY (decl
))
6647 TREE_READONLY (decl
) = 0;
6650 else if (was_readonly
)
6651 TREE_READONLY (decl
) = 1;
6653 /* Likewise if it needs destruction. */
6654 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6655 TREE_READONLY (decl
) = 0;
6658 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6660 /* Check for abstractness of the type. Notice that there is no
6661 need to strip array types here since the check for those types
6662 is already done within create_array_type_for_decl. */
6663 abstract_virtuals_error (decl
, type
);
6665 if (TREE_TYPE (decl
) == error_mark_node
)
6666 /* No initialization required. */
6668 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6672 if (init
== ridpointers
[(int)RID_DEFAULT
])
6674 /* An out-of-class default definition is defined at
6675 the point where it is explicitly defaulted. */
6676 if (DECL_DELETED_FN (decl
))
6677 maybe_explain_implicit_delete (decl
);
6678 else if (DECL_INITIAL (decl
) == error_mark_node
)
6679 synthesize_method (decl
);
6682 error ("function %q#D is initialized like a variable", decl
);
6684 /* else no initialization required. */
6686 else if (DECL_EXTERNAL (decl
)
6687 && ! (DECL_LANG_SPECIFIC (decl
)
6688 && DECL_NOT_REALLY_EXTERN (decl
)))
6691 DECL_INITIAL (decl
) = init
;
6693 /* A variable definition. */
6694 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6695 /* Initialize the local variable. */
6696 initialize_local_var (decl
, init
);
6698 /* If a variable is defined, and then a subsequent
6699 definition with external linkage is encountered, we will
6700 get here twice for the same variable. We want to avoid
6701 calling expand_static_init more than once. For variables
6702 that are not static data members, we can call
6703 expand_static_init only when we actually process the
6704 initializer. It is not legal to redeclare a static data
6705 member, so this issue does not arise in that case. */
6706 else if (var_definition_p
&& TREE_STATIC (decl
))
6707 expand_static_init (decl
, init
);
6710 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6711 reference, insert it in the statement-tree now. */
6715 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6716 push_cleanup (decl
, t
, false);
6717 release_tree_vector (cleanups
);
6721 TREE_READONLY (decl
) = 1;
6723 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6726 /* Returns a declaration for a VAR_DECL as if:
6728 extern "C" TYPE NAME;
6730 had been seen. Used to create compiler-generated global
6734 declare_global_var (tree name
, tree type
)
6738 push_to_top_level ();
6739 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6740 TREE_PUBLIC (decl
) = 1;
6741 DECL_EXTERNAL (decl
) = 1;
6742 DECL_ARTIFICIAL (decl
) = 1;
6743 /* If the user has explicitly declared this variable (perhaps
6744 because the code we are compiling is part of a low-level runtime
6745 library), then it is possible that our declaration will be merged
6746 with theirs by pushdecl. */
6747 decl
= pushdecl (decl
);
6748 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6749 pop_from_top_level ();
6754 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6755 if "__cxa_atexit" is not being used) corresponding to the function
6756 to be called when the program exits. */
6759 get_atexit_fn_ptr_type (void)
6763 if (!atexit_fn_ptr_type_node
)
6766 if (flag_use_cxa_atexit
6767 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6768 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6769 arg_type
= ptr_type_node
;
6771 /* The parameter to "atexit" is "void (*)(void)". */
6772 arg_type
= NULL_TREE
;
6774 fn_type
= build_function_type_list (void_type_node
,
6775 arg_type
, NULL_TREE
);
6776 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6779 return atexit_fn_ptr_type_node
;
6782 /* Returns a pointer to the `atexit' function. Note that if
6783 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6784 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6787 get_atexit_node (void)
6793 bool use_aeabi_atexit
;
6798 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6800 /* The declaration for `__cxa_atexit' is:
6802 int __cxa_atexit (void (*)(void *), void *, void *)
6804 We build up the argument types and then the function type
6806 tree argtype0
, argtype1
, argtype2
;
6808 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6809 /* First, build the pointer-to-function type for the first
6811 fn_ptr_type
= get_atexit_fn_ptr_type ();
6812 /* Then, build the rest of the argument types. */
6813 argtype2
= ptr_type_node
;
6814 if (use_aeabi_atexit
)
6816 argtype1
= fn_ptr_type
;
6817 argtype0
= ptr_type_node
;
6821 argtype1
= ptr_type_node
;
6822 argtype0
= fn_ptr_type
;
6824 /* And the final __cxa_atexit type. */
6825 fn_type
= build_function_type_list (integer_type_node
,
6826 argtype0
, argtype1
, argtype2
,
6828 if (use_aeabi_atexit
)
6829 name
= "__aeabi_atexit";
6831 name
= "__cxa_atexit";
6835 /* The declaration for `atexit' is:
6837 int atexit (void (*)());
6839 We build up the argument types and then the function type
6841 fn_ptr_type
= get_atexit_fn_ptr_type ();
6842 /* Build the final atexit type. */
6843 fn_type
= build_function_type_list (integer_type_node
,
6844 fn_ptr_type
, NULL_TREE
);
6848 /* Now, build the function declaration. */
6849 push_lang_context (lang_name_c
);
6850 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6851 mark_used (atexit_fndecl
);
6852 pop_lang_context ();
6853 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6858 /* Like get_atexit_node, but for thread-local cleanups. */
6861 get_thread_atexit_node (void)
6863 /* The declaration for `__cxa_thread_atexit' is:
6865 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6866 tree fn_type
= build_function_type_list (integer_type_node
,
6867 get_atexit_fn_ptr_type (),
6868 ptr_type_node
, ptr_type_node
,
6871 /* Now, build the function declaration. */
6872 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6873 ECF_LEAF
| ECF_NOTHROW
);
6874 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6877 /* Returns the __dso_handle VAR_DECL. */
6880 get_dso_handle_node (void)
6882 if (dso_handle_node
)
6883 return dso_handle_node
;
6885 /* Declare the variable. */
6886 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6889 #ifdef HAVE_GAS_HIDDEN
6890 if (dso_handle_node
!= error_mark_node
)
6892 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6893 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6897 return dso_handle_node
;
6900 /* Begin a new function with internal linkage whose job will be simply
6901 to destroy some particular variable. */
6903 static GTY(()) int start_cleanup_cnt
;
6906 start_cleanup_fn (void)
6911 bool use_cxa_atexit
= flag_use_cxa_atexit
6912 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6914 push_to_top_level ();
6916 /* No need to mangle this. */
6917 push_lang_context (lang_name_c
);
6919 /* Build the name of the function. */
6920 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6921 /* Build the function declaration. */
6922 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6923 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6924 /* It's a function with internal linkage, generated by the
6926 TREE_PUBLIC (fndecl
) = 0;
6927 DECL_ARTIFICIAL (fndecl
) = 1;
6928 /* Make the function `inline' so that it is only emitted if it is
6929 actually needed. It is unlikely that it will be inlined, since
6930 it is only called via a function pointer, but we avoid unnecessary
6931 emissions this way. */
6932 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6933 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6934 /* Build the parameter. */
6939 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6940 DECL_CONTEXT (parmdecl
) = fndecl
;
6941 TREE_USED (parmdecl
) = 1;
6942 DECL_READ_P (parmdecl
) = 1;
6943 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6947 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6949 pop_lang_context ();
6951 return current_function_decl
;
6954 /* Finish the cleanup function begun by start_cleanup_fn. */
6957 end_cleanup_fn (void)
6959 expand_or_defer_fn (finish_function (0));
6961 pop_from_top_level ();
6964 /* Generate code to handle the destruction of DECL, an object with
6965 static storage duration. */
6968 register_dtor_fn (tree decl
)
6975 bool ob_parm
, dso_parm
, use_dtor
;
6976 tree arg0
, arg1
, arg2
;
6979 type
= TREE_TYPE (decl
);
6980 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6983 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6984 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6985 destructor to "__cxa_atexit"; we don't have to build a temporary
6986 function to do the cleanup. */
6987 dso_parm
= (flag_use_cxa_atexit
6988 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6989 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6990 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6995 /* Find the destructor. */
6996 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6997 gcc_assert (idx
>= 0);
6998 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6999 /* Make sure it is accessible. */
7000 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7001 tf_warning_or_error
);
7005 /* Call build_cleanup before we enter the anonymous function so
7006 that any access checks will be done relative to the current
7007 scope, rather than the scope of the anonymous function. */
7008 build_cleanup (decl
);
7010 /* Now start the function. */
7011 cleanup
= start_cleanup_fn ();
7013 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7014 to the original function, rather than the anonymous one. That
7015 will make the back end think that nested functions are in use,
7016 which causes confusion. */
7017 push_deferring_access_checks (dk_no_check
);
7018 fcall
= build_cleanup (decl
);
7019 pop_deferring_access_checks ();
7021 /* Create the body of the anonymous function. */
7022 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7023 finish_expr_stmt (fcall
);
7024 finish_compound_stmt (compound_stmt
);
7028 /* Call atexit with the cleanup function. */
7029 mark_used (cleanup
);
7030 cleanup
= build_address (cleanup
);
7032 if (DECL_THREAD_LOCAL_P (decl
))
7033 atex_node
= get_thread_atexit_node ();
7035 atex_node
= get_atexit_node ();
7039 /* We must convert CLEANUP to the type that "__cxa_atexit"
7041 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7042 /* "__cxa_atexit" will pass the address of DECL to the
7043 cleanup function. */
7045 addr
= build_address (decl
);
7046 /* The declared type of the parameter to "__cxa_atexit" is
7047 "void *". For plain "T*", we could just let the
7048 machinery in cp_build_function_call convert it -- but if the
7049 type is "cv-qualified T *", then we need to convert it
7050 before passing it in, to avoid spurious errors. */
7051 addr
= build_nop (ptr_type_node
, addr
);
7054 /* Since the cleanup functions we build ignore the address
7055 they're given, there's no reason to pass the actual address
7056 in, and, in general, it's cheaper to pass NULL than any
7058 addr
= null_pointer_node
;
7061 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7062 tf_warning_or_error
);
7064 /* Just pass NULL to the dso handle parm if we don't actually
7065 have a DSO handle on this target. */
7066 arg2
= null_pointer_node
;
7072 if (!DECL_THREAD_LOCAL_P (decl
)
7073 && targetm
.cxx
.use_aeabi_atexit ())
7089 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7090 arg0
, arg1
, arg2
, NULL_TREE
);
7093 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7094 is its initializer. Generate code to handle the construction
7095 and destruction of DECL. */
7098 expand_static_init (tree decl
, tree init
)
7100 gcc_assert (VAR_P (decl
));
7101 gcc_assert (TREE_STATIC (decl
));
7103 /* Some variables require no dynamic initialization. */
7105 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7107 /* Make sure the destructor is callable. */
7108 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7112 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7113 && !DECL_FUNCTION_SCOPE_P (decl
))
7116 error ("non-local variable %qD declared %<__thread%> "
7117 "needs dynamic initialization", decl
);
7119 error ("non-local variable %qD declared %<__thread%> "
7120 "has a non-trivial destructor", decl
);
7121 static bool informed
;
7124 inform (DECL_SOURCE_LOCATION (decl
),
7125 "C++11 %<thread_local%> allows dynamic initialization "
7132 if (DECL_FUNCTION_SCOPE_P (decl
))
7134 /* Emit code to perform this initialization but once. */
7135 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7136 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7137 tree guard
, guard_addr
;
7139 /* We don't need thread-safety code for thread-local vars. */
7140 bool thread_guard
= (flag_threadsafe_statics
7141 && !DECL_THREAD_LOCAL_P (decl
));
7143 /* Emit code to perform this initialization but once. This code
7146 static <type> guard;
7147 if (!guard.first_byte) {
7148 if (__cxa_guard_acquire (&guard)) {
7151 // Do initialization.
7152 flag = true; __cxa_guard_release (&guard);
7153 // Register variable for destruction at end of program.
7155 if (!flag) __cxa_guard_abort (&guard);
7159 Note that the `flag' variable is only set to 1 *after* the
7160 initialization is complete. This ensures that an exception,
7161 thrown during the construction, will cause the variable to
7162 reinitialized when we pass through this code again, as per:
7166 If the initialization exits by throwing an exception, the
7167 initialization is not complete, so it will be tried again
7168 the next time control enters the declaration.
7170 This process should be thread-safe, too; multiple threads
7171 should not be able to initialize the variable more than
7174 /* Create the guard variable. */
7175 guard
= get_guard (decl
);
7177 /* This optimization isn't safe on targets with relaxed memory
7178 consistency. On such targets we force synchronization in
7179 __cxa_guard_acquire. */
7180 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7182 /* Begin the conditional initialization. */
7183 if_stmt
= begin_if_stmt ();
7184 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7185 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7190 tree vfntype
= NULL_TREE
;
7191 tree acquire_name
, release_name
, abort_name
;
7192 tree acquire_fn
, release_fn
, abort_fn
;
7193 guard_addr
= build_address (guard
);
7195 acquire_name
= get_identifier ("__cxa_guard_acquire");
7196 release_name
= get_identifier ("__cxa_guard_release");
7197 abort_name
= get_identifier ("__cxa_guard_abort");
7198 acquire_fn
= identifier_global_value (acquire_name
);
7199 release_fn
= identifier_global_value (release_name
);
7200 abort_fn
= identifier_global_value (abort_name
);
7202 acquire_fn
= push_library_fn
7203 (acquire_name
, build_function_type_list (integer_type_node
,
7204 TREE_TYPE (guard_addr
),
7206 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7207 if (!release_fn
|| !abort_fn
)
7208 vfntype
= build_function_type_list (void_type_node
,
7209 TREE_TYPE (guard_addr
),
7212 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7213 ECF_NOTHROW
| ECF_LEAF
);
7215 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7216 ECF_NOTHROW
| ECF_LEAF
);
7218 inner_if_stmt
= begin_if_stmt ();
7219 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7222 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7223 begin
= get_target_expr (boolean_false_node
);
7224 flag
= TARGET_EXPR_SLOT (begin
);
7226 TARGET_EXPR_CLEANUP (begin
)
7227 = build3 (COND_EXPR
, void_type_node
, flag
,
7229 build_call_n (abort_fn
, 1, guard_addr
));
7230 CLEANUP_EH_ONLY (begin
) = 1;
7232 /* Do the initialization itself. */
7233 init
= add_stmt_to_compound (begin
, init
);
7234 init
= add_stmt_to_compound
7235 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7236 init
= add_stmt_to_compound
7237 (init
, build_call_n (release_fn
, 1, guard_addr
));
7240 init
= add_stmt_to_compound (init
, set_guard (guard
));
7242 /* Use atexit to register a function for destroying this static
7244 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7246 finish_expr_stmt (init
);
7250 finish_compound_stmt (inner_then_clause
);
7251 finish_then_clause (inner_if_stmt
);
7252 finish_if_stmt (inner_if_stmt
);
7255 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7257 finish_compound_stmt (then_clause
);
7258 finish_then_clause (if_stmt
);
7259 finish_if_stmt (if_stmt
);
7262 else if (DECL_THREAD_LOCAL_P (decl
))
7263 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7265 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7269 /* Make TYPE a complete type based on INITIAL_VALUE.
7270 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7271 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7272 3 if the initializer list is empty (in pedantic mode). */
7275 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7278 tree type
, elt_type
;
7280 /* Don't get confused by a CONSTRUCTOR for some other type. */
7281 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7282 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7287 unsigned HOST_WIDE_INT i
;
7290 /* An array of character type can be initialized from a
7291 brace-enclosed string constant.
7293 FIXME: this code is duplicated from reshape_init. Probably
7294 we should just call reshape_init here? */
7295 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7296 && TREE_CODE (initial_value
) == CONSTRUCTOR
7297 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7299 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7300 tree value
= (*v
)[0].value
;
7302 if (TREE_CODE (value
) == STRING_CST
7303 && v
->length () == 1)
7304 initial_value
= value
;
7307 /* If any of the elements are parameter packs, we can't actually
7308 complete this type now because the array size is dependent. */
7309 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7311 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7314 if (PACK_EXPANSION_P (value
))
7320 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7322 /* We can create the array before the element type is complete, which
7323 means that we didn't have these two bits set in the original type
7324 either. In completing the type, we are expected to propagate these
7325 bits. See also complete_type which does the same thing for arrays
7328 if (TYPE_DOMAIN (type
))
7330 elt_type
= TREE_TYPE (type
);
7331 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7332 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7333 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7339 /* As above, but either give an error or reject zero-size arrays, depending
7343 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7344 bool do_default
, tsubst_flags_t complain
)
7347 bool sfinae
= !(complain
& tf_error
);
7348 /* In SFINAE context we can't be lenient about zero-size arrays. */
7351 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7357 /* Not an error. */;
7358 else if (failure
== 1)
7359 error ("initializer fails to determine size of %qT", *ptype
);
7360 else if (failure
== 2)
7363 error ("array size missing in %qT", *ptype
);
7365 else if (failure
== 3)
7366 error ("zero-size array %qT", *ptype
);
7367 *ptype
= error_mark_node
;
7372 /* Return zero if something is declared to be a member of type
7373 CTYPE when in the context of CUR_TYPE. STRING is the error
7374 message to print in that case. Otherwise, quietly return 1. */
7377 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7379 if (ctype
&& ctype
!= cur_type
)
7381 if (flags
== DTOR_FLAG
)
7382 error ("destructor for alien class %qT cannot be a member", ctype
);
7384 error ("constructor for alien class %qT cannot be a member", ctype
);
7390 /* Subroutine of `grokdeclarator'. */
7392 /* Generate errors possibly applicable for a given set of specifiers.
7393 This is for ARM $7.1.2. */
7396 bad_specifiers (tree object
,
7397 enum bad_spec_place type
,
7408 error ("%qD declared as a %<virtual%> variable", object
);
7410 error ("%qD declared as an %<inline%> variable", object
);
7412 error ("%<const%> and %<volatile%> function specifiers on "
7413 "%qD invalid in variable declaration", object
);
7417 error ("%qD declared as a %<virtual%> parameter", object
);
7419 error ("%qD declared as an %<inline%> parameter", object
);
7421 error ("%<const%> and %<volatile%> function specifiers on "
7422 "%qD invalid in parameter declaration", object
);
7426 error ("%qD declared as a %<virtual%> type", object
);
7428 error ("%qD declared as an %<inline%> type", object
);
7430 error ("%<const%> and %<volatile%> function specifiers on "
7431 "%qD invalid in type declaration", object
);
7435 error ("%qD declared as a %<virtual%> field", object
);
7437 error ("%qD declared as an %<inline%> field", object
);
7439 error ("%<const%> and %<volatile%> function specifiers on "
7440 "%qD invalid in field declaration", object
);
7446 error ("%q+D declared as a friend", object
);
7448 && (TREE_CODE (object
) == TYPE_DECL
7449 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7450 && !TYPE_REFFN_P (TREE_TYPE (object
))
7451 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7452 error ("%q+D declared with an exception specification", object
);
7455 /* DECL is a member function or static data member and is presently
7456 being defined. Check that the definition is taking place in a
7460 check_class_member_definition_namespace (tree decl
)
7462 /* These checks only apply to member functions and static data
7464 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7465 /* We check for problems with specializations in pt.c in
7466 check_specialization_namespace, where we can issue better
7468 if (processing_specialization
)
7470 /* There are no restrictions on the placement of
7471 explicit instantiations. */
7472 if (processing_explicit_instantiation
)
7476 A member function definition that appears outside of the
7477 class definition shall appear in a namespace scope enclosing
7478 the class definition.
7482 The definition for a static data member shall appear in a
7483 namespace scope enclosing the member's class definition. */
7484 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7485 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7486 decl
, DECL_CONTEXT (decl
));
7489 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7490 METHOD_TYPE for a non-static member function; QUALS are the
7491 cv-qualifiers that apply to the function. */
7494 build_this_parm (tree type
, cp_cv_quals quals
)
7499 cp_cv_quals this_quals
;
7501 if (CLASS_TYPE_P (type
))
7504 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7505 this_type
= build_pointer_type (this_type
);
7508 this_type
= type_of_this_parm (type
);
7509 /* The `this' parameter is implicitly `const'; it cannot be
7511 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7512 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7513 parm
= build_artificial_parm (this_identifier
, qual_type
);
7514 cp_apply_type_quals_to_decl (this_quals
, parm
);
7518 /* DECL is a static member function. Complain if it was declared
7519 with function-cv-quals. */
7522 check_static_quals (tree decl
, cp_cv_quals quals
)
7524 if (quals
!= TYPE_UNQUALIFIED
)
7525 error ("static member function %q#D declared with type qualifiers",
7529 /* Helper function. Replace the temporary this parameter injected
7530 during cp_finish_omp_declare_simd with the real this parameter. */
7533 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7535 tree this_parm
= (tree
) data
;
7536 if (TREE_CODE (*tp
) == PARM_DECL
7537 && DECL_NAME (*tp
) == this_identifier
7538 && *tp
!= this_parm
)
7540 else if (TYPE_P (*tp
))
7545 /* CTYPE is class type, or null if non-class.
7546 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7548 DECLARATOR is the function's name.
7549 PARMS is a chain of PARM_DECLs for the function.
7550 VIRTUALP is truthvalue of whether the function is virtual or not.
7551 FLAGS are to be passed through to `grokclassfn'.
7552 QUALS are qualifiers indicating whether the function is `const'
7554 RAISES is a list of exceptions that this function can raise.
7555 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7556 not look, and -1 if we should not call `grokclassfn' at all.
7558 SFK is the kind of special function (if any) for the new function.
7560 Returns `NULL_TREE' if something goes wrong, after issuing
7561 applicable error messages. */
7564 grokfndecl (tree ctype
,
7568 tree orig_declarator
,
7570 enum overload_flags flags
,
7572 cp_ref_qualifier rqual
,
7578 special_function_kind sfk
,
7583 location_t location
)
7586 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7590 type
= build_ref_qualified_type (type
, rqual
);
7592 type
= build_exception_variant (type
, raises
);
7594 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7596 /* If we have an explicit location, use it, otherwise use whatever
7597 build_lang_decl used (probably input_location). */
7598 if (location
!= UNKNOWN_LOCATION
)
7599 DECL_SOURCE_LOCATION (decl
) = location
;
7601 if (TREE_CODE (type
) == METHOD_TYPE
)
7604 parm
= build_this_parm (type
, quals
);
7605 DECL_CHAIN (parm
) = parms
;
7608 DECL_ARGUMENTS (decl
) = parms
;
7609 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7610 DECL_CONTEXT (t
) = decl
;
7611 /* Propagate volatile out from type to decl. */
7612 if (TYPE_VOLATILE (type
))
7613 TREE_THIS_VOLATILE (decl
) = 1;
7615 /* Setup decl according to sfk. */
7618 case sfk_constructor
:
7619 case sfk_copy_constructor
:
7620 case sfk_move_constructor
:
7621 DECL_CONSTRUCTOR_P (decl
) = 1;
7623 case sfk_destructor
:
7624 DECL_DESTRUCTOR_P (decl
) = 1;
7630 /* If pointers to member functions use the least significant bit to
7631 indicate whether a function is virtual, ensure a pointer
7632 to this function will have that bit clear. */
7633 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7634 && TREE_CODE (type
) == METHOD_TYPE
7635 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7636 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7639 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7643 ("defining explicit specialization %qD in friend declaration",
7647 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7648 tree args
= TREE_OPERAND (orig_declarator
, 1);
7650 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7652 /* Something like `template <class T> friend void f<T>()'. */
7653 error ("invalid use of template-id %qD in declaration "
7654 "of primary template",
7660 /* A friend declaration of the form friend void f<>(). Record
7661 the information in the TEMPLATE_ID_EXPR. */
7662 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7664 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7665 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7667 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7668 if (TREE_PURPOSE (t
)
7669 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7671 error ("default arguments are not allowed in declaration "
7672 "of friend template specialization %qD",
7678 error ("%<inline%> is not allowed in declaration of friend "
7679 "template specialization %qD",
7682 error ("%<constexpr%> is not allowed in declaration of friend "
7683 "template specialization %qD",
7690 /* If this decl has namespace scope, set that up. */
7692 set_decl_namespace (decl
, in_namespace
, friendp
);
7694 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7696 /* `main' and builtins have implicit 'C' linkage. */
7697 if ((MAIN_NAME_P (declarator
)
7698 || (IDENTIFIER_LENGTH (declarator
) > 10
7699 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7700 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7701 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7702 || (targetcm
.cxx_implicit_extern_c
7703 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7704 && current_lang_name
== lang_name_cplusplus
7705 && ctype
== NULL_TREE
7706 && DECL_FILE_SCOPE_P (decl
))
7707 SET_DECL_LANGUAGE (decl
, lang_c
);
7709 /* Should probably propagate const out from type to decl I bet (mrs). */
7712 DECL_STATIC_FUNCTION_P (decl
) = 1;
7713 DECL_CONTEXT (decl
) = ctype
;
7718 DECL_CONTEXT (decl
) = ctype
;
7720 check_class_member_definition_namespace (decl
);
7723 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7725 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7726 error ("cannot declare %<::main%> to be a template");
7728 error ("cannot declare %<::main%> to be inline");
7730 error ("cannot declare %<::main%> to be constexpr");
7732 error ("cannot declare %<::main%> to be static");
7737 /* Members of anonymous types and local classes have no linkage; make
7738 them internal. If a typedef is made later, this will be changed. */
7739 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7740 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7743 if (publicp
&& cxx_dialect
== cxx98
)
7745 /* [basic.link]: A name with no linkage (notably, the name of a class
7746 or enumeration declared in a local scope) shall not be used to
7747 declare an entity with linkage.
7749 DR 757 relaxes this restriction for C++0x. */
7750 no_linkage_error (decl
);
7753 TREE_PUBLIC (decl
) = publicp
;
7756 DECL_INTERFACE_KNOWN (decl
) = 1;
7757 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7760 /* If the declaration was declared inline, mark it as such. */
7763 DECL_DECLARED_INLINE_P (decl
) = 1;
7765 DECL_COMDAT (decl
) = 1;
7768 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7770 DECL_EXTERNAL (decl
) = 1;
7771 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7776 ? G_("static member function %qD cannot have cv-qualifier")
7777 : G_("non-member function %qD cannot have cv-qualifier"),
7779 quals
= TYPE_UNQUALIFIED
;
7785 ? G_("static member function %qD cannot have ref-qualifier")
7786 : G_("non-member function %qD cannot have ref-qualifier"),
7788 rqual
= REF_QUAL_NONE
;
7792 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7793 && !grok_op_properties (decl
, /*complain=*/true))
7795 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7797 bool long_long_unsigned_p
;
7799 const char *suffix
= NULL
;
7800 /* [over.literal]/6: Literal operators shall not have C linkage. */
7801 if (DECL_LANGUAGE (decl
) == lang_c
)
7803 error ("literal operator with C linkage");
7807 if (DECL_NAMESPACE_SCOPE_P (decl
))
7809 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7812 error ("%qD has invalid argument list", decl
);
7816 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7817 if (long_long_unsigned_p
)
7819 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7820 warning (0, "integer suffix %<%s%>"
7821 " shadowed by implementation", suffix
);
7823 else if (long_double_p
)
7825 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7826 warning (0, "floating point suffix %<%s%>"
7827 " shadowed by implementation", suffix
);
7832 error ("%qD must be a non-member function", decl
);
7838 /* Make the init_value nonzero so pushdecl knows this is not
7839 tentative. error_mark_node is replaced later with the BLOCK. */
7840 DECL_INITIAL (decl
) = error_mark_node
;
7842 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7843 TREE_NOTHROW (decl
) = 1;
7845 if (flag_openmp
|| flag_cilkplus
)
7847 /* Adjust "omp declare simd" attributes. */
7848 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7852 for (attr
= ods
; attr
;
7853 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7855 if (TREE_CODE (type
) == METHOD_TYPE
)
7856 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7857 DECL_ARGUMENTS (decl
), NULL
);
7858 if (TREE_VALUE (attr
) != NULL_TREE
)
7860 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7861 cl
= c_omp_declare_simd_clauses_to_numbers
7862 (DECL_ARGUMENTS (decl
), cl
);
7864 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7866 TREE_VALUE (attr
) = NULL_TREE
;
7872 /* Caller will do the rest of this. */
7876 if (ctype
!= NULL_TREE
)
7877 grokclassfn (ctype
, decl
, flags
);
7880 if (cxx_dialect
>= cxx11
7881 && DECL_DESTRUCTOR_P (decl
)
7882 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7883 && !processing_template_decl
)
7884 deduce_noexcept_on_destructor (decl
);
7886 decl
= check_explicit_specialization (orig_declarator
, decl
,
7889 4 * (friendp
!= 0));
7890 if (decl
== error_mark_node
)
7893 if (DECL_STATIC_FUNCTION_P (decl
))
7894 check_static_quals (decl
, quals
);
7898 cplus_decl_attributes (&decl
, *attrlist
, 0);
7899 *attrlist
= NULL_TREE
;
7902 /* Check main's type after attributes have been applied. */
7903 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7905 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7908 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7910 error ("%<::main%> must return %<int%>");
7911 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7912 TREE_TYPE (decl
) = newtype
;
7915 check_main_parameter_types (decl
);
7918 if (ctype
!= NULL_TREE
7919 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7922 tree old_decl
= check_classfn (ctype
, decl
,
7923 (processing_template_decl
7924 > template_class_depth (ctype
))
7925 ? current_template_parms
7928 if (old_decl
== error_mark_node
)
7936 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7937 /* Because grokfndecl is always supposed to return a
7938 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7939 here. We depend on our callers to figure out that its
7940 really a template that's being returned. */
7941 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7943 if (DECL_STATIC_FUNCTION_P (old_decl
)
7944 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7946 /* Remove the `this' parm added by grokclassfn. */
7947 revert_static_member_fn (decl
);
7948 check_static_quals (decl
, quals
);
7950 if (DECL_ARTIFICIAL (old_decl
))
7952 error ("definition of implicitly-declared %qD", old_decl
);
7955 else if (DECL_DEFAULTED_FN (old_decl
))
7957 error ("definition of explicitly-defaulted %q+D", decl
);
7958 error ("%q+#D explicitly defaulted here", old_decl
);
7962 /* Since we've smashed OLD_DECL to its
7963 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7964 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7965 decl
= DECL_TEMPLATE_RESULT (decl
);
7967 /* Attempt to merge the declarations. This can fail, in
7968 the case of some invalid specialization declarations. */
7969 pushed_scope
= push_scope (ctype
);
7970 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7972 pop_scope (pushed_scope
);
7975 error ("no %q#D member function declared in class %qT",
7979 if (ok
== error_mark_node
)
7985 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7988 if (ctype
== NULL_TREE
|| check
)
7992 DECL_VIRTUAL_P (decl
) = 1;
7997 /* decl is a FUNCTION_DECL.
7998 specifiers are the parsed virt-specifiers.
8000 Set flags to reflect the virt-specifiers.
8005 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8007 if (decl
== NULL_TREE
)
8009 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8010 DECL_OVERRIDE_P (decl
) = 1;
8011 if (specifiers
& VIRT_SPEC_FINAL
)
8012 DECL_FINAL_P (decl
) = 1;
8016 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8017 the linkage that DECL will receive in the object file. */
8020 set_linkage_for_static_data_member (tree decl
)
8022 /* A static data member always has static storage duration and
8023 external linkage. Note that static data members are forbidden in
8024 local classes -- the only situation in which a class has
8025 non-external linkage. */
8026 TREE_PUBLIC (decl
) = 1;
8027 TREE_STATIC (decl
) = 1;
8028 /* For non-template classes, static data members are always put
8029 out in exactly those files where they are defined, just as
8030 with ordinary namespace-scope variables. */
8031 if (!processing_template_decl
)
8032 DECL_INTERFACE_KNOWN (decl
) = 1;
8035 /* Create a VAR_DECL named NAME with the indicated TYPE.
8037 If SCOPE is non-NULL, it is the class type or namespace containing
8038 the variable. If SCOPE is NULL, the variable should is created in
8039 the innermost enclosing scope. */
8042 grokvardecl (tree type
,
8044 tree orig_declarator
,
8045 const cp_decl_specifier_seq
*declspecs
,
8052 tree explicit_scope
;
8054 gcc_assert (!name
|| identifier_p (name
));
8056 /* Compute the scope in which to place the variable, but remember
8057 whether or not that scope was explicitly specified by the user. */
8058 explicit_scope
= scope
;
8061 /* An explicit "extern" specifier indicates a namespace-scope
8063 if (declspecs
->storage_class
== sc_extern
)
8064 scope
= current_decl_namespace ();
8065 else if (!at_function_scope_p ())
8066 scope
= current_scope ();
8070 && (/* If the variable is a namespace-scope variable declared in a
8071 template, we need DECL_LANG_SPECIFIC. */
8072 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8073 /* Similarly for namespace-scope variables with language linkage
8075 || (TREE_CODE (scope
) == NAMESPACE_DECL
8076 && current_lang_name
!= lang_name_cplusplus
)
8077 /* Similarly for static data members. */
8079 /* Similarly for explicit specializations. */
8081 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8082 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8084 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8086 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8087 set_decl_namespace (decl
, explicit_scope
, 0);
8089 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8091 if (declspecs
->storage_class
== sc_extern
)
8093 DECL_THIS_EXTERN (decl
) = 1;
8094 DECL_EXTERNAL (decl
) = !initialized
;
8097 if (DECL_CLASS_SCOPE_P (decl
))
8099 set_linkage_for_static_data_member (decl
);
8100 /* This function is only called with out-of-class definitions. */
8101 DECL_EXTERNAL (decl
) = 0;
8102 check_class_member_definition_namespace (decl
);
8104 /* At top level, either `static' or no s.c. makes a definition
8105 (perhaps tentative), and absence of `static' makes it public. */
8106 else if (toplevel_bindings_p ())
8108 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8109 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8110 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8112 /* Not at top level, only `static' makes a static definition. */
8115 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8116 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8119 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8121 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8122 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8123 if (declspecs
->gnu_thread_keyword_p
)
8124 DECL_GNU_TLS_P (decl
) = true;
8127 /* If the type of the decl has no linkage, make sure that we'll
8128 notice that in mark_used. */
8129 if (cxx_dialect
> cxx98
8130 && decl_linkage (decl
) != lk_none
8131 && DECL_LANG_SPECIFIC (decl
) == NULL
8132 && !DECL_EXTERN_C_P (decl
)
8133 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8134 retrofit_lang_decl (decl
);
8136 if (TREE_PUBLIC (decl
))
8138 /* [basic.link]: A name with no linkage (notably, the name of a class
8139 or enumeration declared in a local scope) shall not be used to
8140 declare an entity with linkage.
8142 DR 757 relaxes this restriction for C++0x. */
8143 if (cxx_dialect
< cxx11
)
8144 no_linkage_error (decl
);
8147 DECL_INTERFACE_KNOWN (decl
) = 1;
8149 // Handle explicit specializations and instantiations of variable templates.
8150 if (orig_declarator
)
8151 decl
= check_explicit_specialization (orig_declarator
, decl
,
8154 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8157 /* Create and return a canonical pointer to member function type, for
8158 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8161 build_ptrmemfunc_type (tree type
)
8166 if (type
== error_mark_node
)
8169 /* If a canonical type already exists for this type, use it. We use
8170 this method instead of type_hash_canon, because it only does a
8171 simple equality check on the list of field members. */
8173 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8176 /* Make sure that we always have the unqualified pointer-to-member
8178 if (cp_cv_quals quals
= cp_type_quals (type
))
8180 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8181 return cp_build_qualified_type (unqual
, quals
);
8184 t
= make_node (RECORD_TYPE
);
8186 /* Let the front end know this is a pointer to member function. */
8187 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8189 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8192 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8194 DECL_CHAIN (field
) = fields
;
8197 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8199 /* Zap out the name so that the back end will give us the debugging
8200 information for this anonymous RECORD_TYPE. */
8201 TYPE_NAME (t
) = NULL_TREE
;
8203 /* Cache this pointer-to-member type so that we can find it again
8205 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8207 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8208 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8209 else if (TYPE_CANONICAL (type
) != type
)
8210 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8215 /* Create and return a pointer to data member type. */
8218 build_ptrmem_type (tree class_type
, tree member_type
)
8220 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8222 cp_cv_quals quals
= type_memfn_quals (member_type
);
8223 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8224 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8225 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8229 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8230 return build_offset_type (class_type
, member_type
);
8234 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8235 Check to see that the definition is valid. Issue appropriate error
8236 messages. Return 1 if the definition is particularly bad, or 0
8240 check_static_variable_definition (tree decl
, tree type
)
8242 /* Can't check yet if we don't know the type. */
8243 if (dependent_type_p (type
))
8245 /* If DECL is declared constexpr, we'll do the appropriate checks
8246 in check_initializer. */
8247 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8249 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8251 if (!COMPLETE_TYPE_P (type
))
8252 error ("in-class initialization of static data member %q#D of "
8253 "incomplete type", decl
);
8254 else if (literal_type_p (type
))
8255 permerror (input_location
,
8256 "%<constexpr%> needed for in-class initialization of "
8257 "static data member %q#D of non-integral type", decl
);
8259 error ("in-class initialization of static data member %q#D of "
8260 "non-literal type", decl
);
8264 /* Motion 10 at San Diego: If a static const integral data member is
8265 initialized with an integral constant expression, the initializer
8266 may appear either in the declaration (within the class), or in
8267 the definition, but not both. If it appears in the class, the
8268 member is a member constant. The file-scope definition is always
8270 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8272 error ("invalid in-class initialization of static data member "
8273 "of non-integral type %qT",
8277 else if (!CP_TYPE_CONST_P (type
))
8278 error ("ISO C++ forbids in-class initialization of non-const "
8279 "static member %qD",
8281 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8282 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8283 "%qD of non-integral type %qT", decl
, type
);
8288 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8289 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8290 expressions out into temporary variables so that walk_tree doesn't
8291 step into them (c++/15764). */
8294 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8296 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8297 tree expr
= *expr_p
;
8298 if (TREE_CODE (expr
) == SAVE_EXPR
)
8300 tree op
= TREE_OPERAND (expr
, 0);
8301 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8302 if (TREE_SIDE_EFFECTS (op
))
8303 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8306 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8311 /* Entry point for the above. */
8314 stabilize_vla_size (tree size
)
8316 hash_set
<tree
> pset
;
8317 /* Break out any function calls into temporary variables. */
8318 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8321 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8322 not inside of SAVE_EXPR and fold them. */
8325 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8327 tree expr
= *expr_p
;
8328 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8330 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8332 *(bool *)data
= true;
8333 if (SIZEOF_EXPR_TYPE_P (expr
))
8334 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8335 SIZEOF_EXPR
, false);
8336 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8337 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8340 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8342 if (expr
== error_mark_node
)
8343 expr
= size_one_node
;
8350 /* Given the SIZE (i.e., number of elements) in an array, compute an
8351 appropriate index type for the array. If non-NULL, NAME is the
8352 name of the thing being declared. */
8355 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8360 if (error_operand_p (size
))
8361 return error_mark_node
;
8363 if (!type_dependent_expression_p (size
))
8365 tree type
= TREE_TYPE (size
);
8367 mark_rvalue_use (size
);
8369 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8370 && TREE_SIDE_EFFECTS (size
))
8371 /* In C++98, we mark a non-constant array bound with a magic
8372 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8375 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8377 if (CLASS_TYPE_P (type
)
8378 && CLASSTYPE_LITERAL_P (type
))
8380 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8383 if (!(complain
& tf_error
))
8384 return error_mark_node
;
8386 error ("size of array %qD has non-integral type %qT",
8389 error ("size of array has non-integral type %qT", type
);
8390 size
= integer_one_node
;
8392 if (size
== error_mark_node
)
8393 return error_mark_node
;
8394 type
= TREE_TYPE (size
);
8397 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8398 size
= maybe_constant_value (size
);
8400 if (!TREE_CONSTANT (size
))
8404 if (error_operand_p (size
))
8405 return error_mark_node
;
8407 /* The array bound must be an integer type. */
8408 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8410 if (!(complain
& tf_error
))
8411 return error_mark_node
;
8413 error ("size of array %qD has non-integral type %qT", name
, type
);
8415 error ("size of array has non-integral type %qT", type
);
8416 size
= integer_one_node
;
8417 type
= TREE_TYPE (size
);
8421 /* A type is dependent if it is...an array type constructed from any
8422 dependent type or whose size is specified by a constant expression
8423 that is value-dependent. */
8424 /* We can only call value_dependent_expression_p on integral constant
8425 expressions; treat non-constant expressions as dependent, too. */
8426 if (processing_template_decl
8427 && (type_dependent_expression_p (size
)
8428 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8430 /* We cannot do any checking for a SIZE that isn't known to be
8431 constant. Just build the index type and mark that it requires
8432 structural equality checks. */
8433 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8434 size
, size_one_node
));
8435 TYPE_DEPENDENT_P (itype
) = 1;
8436 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8437 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8441 /* Normally, the array-bound will be a constant. */
8442 if (TREE_CODE (size
) == INTEGER_CST
)
8444 /* Check to see if the array bound overflowed. Make that an
8445 error, no matter how generous we're being. */
8446 constant_expression_error (size
);
8448 /* An array must have a positive number of elements. */
8449 if (tree_int_cst_lt (size
, integer_zero_node
))
8451 if (!(complain
& tf_error
))
8452 return error_mark_node
;
8454 error ("size of array %qD is negative", name
);
8456 error ("size of array is negative");
8457 size
= integer_one_node
;
8459 /* As an extension we allow zero-sized arrays. */
8460 else if (integer_zerop (size
))
8462 if (!(complain
& tf_error
))
8463 /* We must fail if performing argument deduction (as
8464 indicated by the state of complain), so that
8465 another substitution can be found. */
8466 return error_mark_node
;
8467 else if (in_system_header_at (input_location
))
8468 /* Allow them in system headers because glibc uses them. */;
8470 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8472 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8475 else if (TREE_CONSTANT (size
)
8476 /* We don't allow VLAs at non-function scopes, or during
8477 tentative template substitution. */
8478 || !at_function_scope_p ()
8479 || (cxx_dialect
< cxx14
&& !(complain
& tf_error
)))
8481 if (!(complain
& tf_error
))
8482 return error_mark_node
;
8483 /* `(int) &fn' is not a valid array bound. */
8485 error ("size of array %qD is not an integral constant-expression",
8488 error ("size of array is not an integral constant-expression");
8489 size
= integer_one_node
;
8491 else if (cxx_dialect
< cxx14
&& pedantic
&& warn_vla
!= 0)
8494 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8496 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8498 else if (warn_vla
> 0)
8502 "variable length array %qD is used", name
);
8505 "variable length array is used");
8508 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8509 /* A variable sized array. */
8510 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8513 HOST_WIDE_INT saved_processing_template_decl
;
8515 /* Compute the index of the largest element in the array. It is
8516 one less than the number of elements in the array. We save
8517 and restore PROCESSING_TEMPLATE_DECL so that computations in
8518 cp_build_binary_op will be appropriately folded. */
8519 saved_processing_template_decl
= processing_template_decl
;
8520 processing_template_decl
= 0;
8521 itype
= cp_build_binary_op (input_location
,
8523 cp_convert (ssizetype
, size
, complain
),
8524 cp_convert (ssizetype
, integer_one_node
,
8527 itype
= fold (itype
);
8528 processing_template_decl
= saved_processing_template_decl
;
8530 if (!TREE_CONSTANT (itype
))
8532 /* A variable sized array. */
8533 itype
= variable_size (itype
);
8535 if (TREE_CODE (itype
) != SAVE_EXPR
)
8537 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8538 they might survive till gimplification. */
8539 tree newitype
= itype
;
8541 cp_walk_tree_without_duplicates (&newitype
,
8542 fold_sizeof_expr_r
, &found
);
8544 itype
= variable_size (fold (newitype
));
8547 stabilize_vla_size (itype
);
8549 if (cxx_dialect
>= cxx14
&& flag_exceptions
)
8551 /* If the VLA bound is larger than half the address space,
8552 or less than zero, throw std::bad_array_length. */
8553 tree comp
= build2 (LT_EXPR
, boolean_type_node
, itype
,
8555 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
8556 throw_bad_array_length (), void_node
);
8557 finish_expr_stmt (comp
);
8559 else if (flag_sanitize
& SANITIZE_VLA
8560 && current_function_decl
!= NULL_TREE
8561 && !lookup_attribute ("no_sanitize_undefined",
8563 (current_function_decl
)))
8565 /* From C++14 onwards, we throw an exception on a negative
8566 length size of an array; see above. */
8568 /* We have to add 1 -- in the ubsan routine we generate
8569 LE_EXPR rather than LT_EXPR. */
8570 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8571 build_one_cst (TREE_TYPE (itype
)));
8572 t
= ubsan_instrument_vla (input_location
, t
);
8573 finish_expr_stmt (t
);
8576 /* Make sure that there was no overflow when creating to a signed
8577 index type. (For example, on a 32-bit machine, an array with
8578 size 2^32 - 1 is too big.) */
8579 else if (TREE_CODE (itype
) == INTEGER_CST
8580 && TREE_OVERFLOW (itype
))
8582 if (!(complain
& tf_error
))
8583 return error_mark_node
;
8584 error ("overflow in array dimension");
8585 TREE_OVERFLOW (itype
) = 0;
8589 /* Create and return the appropriate index type. */
8590 itype
= build_index_type (itype
);
8592 /* If the index type were dependent, we would have returned early, so
8593 remember that it isn't. */
8594 TYPE_DEPENDENT_P (itype
) = 0;
8595 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8599 /* Returns the scope (if any) in which the entity declared by
8600 DECLARATOR will be located. If the entity was declared with an
8601 unqualified name, NULL_TREE is returned. */
8604 get_scope_of_declarator (const cp_declarator
*declarator
)
8606 while (declarator
&& declarator
->kind
!= cdk_id
)
8607 declarator
= declarator
->declarator
;
8609 /* If the declarator-id is a SCOPE_REF, the scope in which the
8610 declaration occurs is the first operand. */
8612 && declarator
->u
.id
.qualifying_scope
)
8613 return declarator
->u
.id
.qualifying_scope
;
8615 /* Otherwise, the declarator is not a qualified name; the entity will
8616 be declared in the current scope. */
8620 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8621 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8625 create_array_type_for_decl (tree name
, tree type
, tree size
)
8627 tree itype
= NULL_TREE
;
8629 /* If things have already gone awry, bail now. */
8630 if (type
== error_mark_node
|| size
== error_mark_node
)
8631 return error_mark_node
;
8633 /* 8.3.4/1: If the type of the identifier of D contains the auto
8634 type-specifier, the program is ill-formed. */
8635 if (type_uses_auto (type
))
8637 error ("%qD declared as array of %qT", name
, type
);
8638 return error_mark_node
;
8641 /* If there are some types which cannot be array elements,
8642 issue an error-message and return. */
8643 switch (TREE_CODE (type
))
8647 error ("declaration of %qD as array of void", name
);
8649 error ("creating array of void");
8650 return error_mark_node
;
8654 error ("declaration of %qD as array of functions", name
);
8656 error ("creating array of functions");
8657 return error_mark_node
;
8659 case REFERENCE_TYPE
:
8661 error ("declaration of %qD as array of references", name
);
8663 error ("creating array of references");
8664 return error_mark_node
;
8668 error ("declaration of %qD as array of function members", name
);
8670 error ("creating array of function members");
8671 return error_mark_node
;
8679 The constant expressions that specify the bounds of the arrays
8680 can be omitted only for the first member of the sequence. */
8681 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8684 error ("declaration of %qD as multidimensional array must "
8685 "have bounds for all dimensions except the first",
8688 error ("multidimensional array must have bounds for all "
8689 "dimensions except the first");
8691 return error_mark_node
;
8694 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
8695 && (flag_iso
|| warn_vla
> 0))
8696 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8698 /* Figure out the index type for the array. */
8700 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8703 T is called the array element type; this type shall not be [...] an
8704 abstract class type. */
8705 abstract_virtuals_error (name
, type
);
8707 return build_cplus_array_type (type
, itype
);
8710 /* Check that it's OK to declare a function with the indicated TYPE.
8711 SFK indicates the kind of special function (if any) that this
8712 function is. OPTYPE is the type given in a conversion operator
8713 declaration, or the class type for a constructor/destructor.
8714 Returns the actual return type of the function; that
8715 may be different than TYPE if an error occurs, or for certain
8716 special functions. */
8719 check_special_function_return_type (special_function_kind sfk
,
8725 case sfk_constructor
:
8727 error ("return type specification for constructor invalid");
8729 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8730 type
= build_pointer_type (optype
);
8732 type
= void_type_node
;
8735 case sfk_destructor
:
8737 error ("return type specification for destructor invalid");
8738 /* We can't use the proper return type here because we run into
8739 problems with ambiguous bases and covariant returns.
8740 Java classes are left unchanged because (void *) isn't a valid
8741 Java type, and we don't want to change the Java ABI. */
8742 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8743 type
= build_pointer_type (void_type_node
);
8745 type
= void_type_node
;
8748 case sfk_conversion
:
8750 error ("return type specified for %<operator %T%>", optype
);
8761 /* A variable or data member (whose unqualified name is IDENTIFIER)
8762 has been declared with the indicated TYPE. If the TYPE is not
8763 acceptable, issue an error message and return a type to use for
8764 error-recovery purposes. */
8767 check_var_type (tree identifier
, tree type
)
8769 if (VOID_TYPE_P (type
))
8772 error ("unnamed variable or field declared void");
8773 else if (identifier_p (identifier
))
8775 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8776 error ("variable or field %qE declared void", identifier
);
8779 error ("variable or field declared void");
8780 type
= error_mark_node
;
8786 /* Given declspecs and a declarator (abstract or otherwise), determine
8787 the name and type of the object declared and construct a DECL node
8790 DECLSPECS points to the representation of declaration-specifier
8791 sequence that precedes declarator.
8793 DECL_CONTEXT says which syntactic context this declaration is in:
8794 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8795 FUNCDEF for a function definition. Like NORMAL but a few different
8796 error messages in each case. Return value may be zero meaning
8797 this definition is too screwy to try to parse.
8798 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8799 handle member functions (which have FIELD context).
8800 Return value may be zero meaning this definition is too screwy to
8802 PARM for a parameter declaration (either within a function prototype
8803 or before a function body). Make a PARM_DECL, or return void_type_node.
8804 TPARM for a template parameter declaration.
8805 CATCHPARM for a parameter declaration before a catch clause.
8806 TYPENAME if for a typename (in a cast or sizeof).
8807 Don't make a DECL node; just return the ..._TYPE node.
8808 FIELD for a struct or union field; make a FIELD_DECL.
8809 BITFIELD for a field with specified width.
8811 INITIALIZED is as for start_decl.
8813 ATTRLIST is a pointer to the list of attributes, which may be NULL
8814 if there are none; *ATTRLIST may be modified if attributes from inside
8815 the declarator should be applied to the declaration.
8817 When this function is called, scoping variables (such as
8818 CURRENT_CLASS_TYPE) should reflect the scope in which the
8819 declaration occurs, not the scope in which the new declaration will
8820 be placed. For example, on:
8824 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8827 Returns a DECL (if a declarator is present), a TYPE (if there is no
8828 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8832 grokdeclarator (const cp_declarator
*declarator
,
8833 cp_decl_specifier_seq
*declspecs
,
8834 enum decl_context decl_context
,
8838 tree type
= NULL_TREE
;
8840 int explicit_intN
= 0;
8841 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8842 int explicit_int
= 0;
8843 int explicit_char
= 0;
8844 int defaulted_int
= 0;
8846 tree typedef_decl
= NULL_TREE
;
8847 const char *name
= NULL
;
8848 tree typedef_type
= NULL_TREE
;
8849 /* True if this declarator is a function definition. */
8850 bool funcdef_flag
= false;
8851 cp_declarator_kind innermost_code
= cdk_error
;
8854 /* See the code below that used this. */
8855 tree decl_attr
= NULL_TREE
;
8858 /* Keep track of what sort of function is being processed
8859 so that we can warn about default return values, or explicit
8860 return values which do not match prescribed defaults. */
8861 special_function_kind sfk
= sfk_none
;
8863 tree dname
= NULL_TREE
;
8864 tree ctor_return_type
= NULL_TREE
;
8865 enum overload_flags flags
= NO_SPECIAL
;
8866 /* cv-qualifiers that apply to the declarator, for a declaration of
8867 a member function. */
8868 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8869 /* virt-specifiers that apply to the declarator, for a declaration of
8870 a member function. */
8871 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8872 /* ref-qualifier that applies to the declarator, for a declaration of
8873 a member function. */
8874 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8875 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8877 tree raises
= NULL_TREE
;
8878 int template_count
= 0;
8879 tree returned_attrs
= NULL_TREE
;
8880 tree parms
= NULL_TREE
;
8881 const cp_declarator
*id_declarator
;
8882 /* The unqualified name of the declarator; either an
8883 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8884 tree unqualified_id
;
8885 /* The class type, if any, in which this entity is located,
8886 or NULL_TREE if none. Note that this value may be different from
8887 the current class type; for example if an attempt is made to declare
8888 "A::f" inside "B", this value will be "A". */
8889 tree ctype
= current_class_type
;
8890 /* The NAMESPACE_DECL for the namespace in which this entity is
8891 located. If an unqualified name is used to declare the entity,
8892 this value will be NULL_TREE, even if the entity is located at
8894 tree in_namespace
= NULL_TREE
;
8895 cp_storage_class storage_class
;
8896 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8897 bool type_was_error_mark_node
= false;
8898 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8899 bool template_type_arg
= false;
8900 bool template_parm_flag
= false;
8901 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8902 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8903 bool late_return_type_p
= false;
8904 bool array_parameter_p
= false;
8905 source_location saved_loc
= input_location
;
8908 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8909 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8910 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8911 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8912 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8913 explicit_intN
= declspecs
->explicit_intN_p
;
8914 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8916 if (decl_context
== FUNCDEF
)
8917 funcdef_flag
= true, decl_context
= NORMAL
;
8918 else if (decl_context
== MEMFUNCDEF
)
8919 funcdef_flag
= true, decl_context
= FIELD
;
8920 else if (decl_context
== BITFIELD
)
8921 bitfield
= 1, decl_context
= FIELD
;
8922 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8923 template_type_arg
= true, decl_context
= TYPENAME
;
8924 else if (decl_context
== TPARM
)
8925 template_parm_flag
= true, decl_context
= PARM
;
8927 if (initialized
> 1)
8928 funcdef_flag
= true;
8930 /* Look inside a declarator for the name being declared
8931 and get it as a string, for an error message. */
8932 for (id_declarator
= declarator
;
8934 id_declarator
= id_declarator
->declarator
)
8936 if (id_declarator
->kind
!= cdk_id
)
8937 innermost_code
= id_declarator
->kind
;
8939 switch (id_declarator
->kind
)
8942 if (id_declarator
->declarator
8943 && id_declarator
->declarator
->kind
== cdk_id
)
8945 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8946 if (sfk
== sfk_destructor
)
8953 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8954 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8957 if (qualifying_scope
)
8959 if (at_function_scope_p ())
8963 A declarator-id shall not be qualified except
8966 None of the cases are permitted in block
8968 if (qualifying_scope
== global_namespace
)
8969 error ("invalid use of qualified-name %<::%D%>",
8971 else if (TYPE_P (qualifying_scope
))
8972 error ("invalid use of qualified-name %<%T::%D%>",
8973 qualifying_scope
, decl
);
8975 error ("invalid use of qualified-name %<%D::%D%>",
8976 qualifying_scope
, decl
);
8977 return error_mark_node
;
8979 else if (TYPE_P (qualifying_scope
))
8981 ctype
= qualifying_scope
;
8982 if (!MAYBE_CLASS_TYPE_P (ctype
))
8984 error ("%q#T is not a class or a namespace", ctype
);
8987 else if (innermost_code
!= cdk_function
8988 && current_class_type
8989 && !uniquely_derived_from_p (ctype
,
8990 current_class_type
))
8992 error ("invalid use of qualified-name %<%T::%D%>",
8993 qualifying_scope
, decl
);
8994 return error_mark_node
;
8997 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8998 in_namespace
= qualifying_scope
;
9000 switch (TREE_CODE (decl
))
9006 if (innermost_code
!= cdk_function
)
9008 error ("declaration of %qD as non-function", decl
);
9009 return error_mark_node
;
9011 else if (!qualifying_scope
9012 && !(current_class_type
&& at_class_scope_p ()))
9014 error ("declaration of %qD as non-member", decl
);
9015 return error_mark_node
;
9018 type
= TREE_OPERAND (decl
, 0);
9020 type
= constructor_name (type
);
9021 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9026 case TEMPLATE_ID_EXPR
:
9028 tree fns
= TREE_OPERAND (decl
, 0);
9031 if (!identifier_p (dname
))
9033 if (variable_template_p (dname
))
9034 dname
= DECL_NAME (dname
);
9037 gcc_assert (is_overloaded_fn (dname
));
9038 dname
= DECL_NAME (get_first_fn (dname
));
9044 case IDENTIFIER_NODE
:
9045 if (identifier_p (decl
))
9048 if (C_IS_RESERVED_WORD (dname
))
9050 error ("declarator-id missing; using reserved word %qD",
9052 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9054 else if (!IDENTIFIER_TYPENAME_P (dname
))
9055 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9058 gcc_assert (flags
== NO_SPECIAL
);
9059 flags
= TYPENAME_FLAG
;
9060 ctor_return_type
= TREE_TYPE (dname
);
9061 sfk
= sfk_conversion
;
9062 if (is_typename_at_global_scope (dname
))
9063 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9065 name
= "<invalid operator>";
9082 return error_mark_node
;
9087 if (id_declarator
->kind
== cdk_id
)
9093 The declarator in a function-definition shall have the form
9094 D1 ( parameter-declaration-clause) ... */
9095 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9097 error ("function definition does not declare parameters");
9098 return error_mark_node
;
9101 if (flags
== TYPENAME_FLAG
9102 && innermost_code
!= cdk_function
9103 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9105 error ("declaration of %qD as non-function", dname
);
9106 return error_mark_node
;
9110 && identifier_p (dname
)
9111 && UDLIT_OPER_P (dname
)
9112 && innermost_code
!= cdk_function
)
9114 error ("declaration of %qD as non-function", dname
);
9115 return error_mark_node
;
9118 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9122 error ("declaration of %qD as %<typedef%>", dname
);
9123 return error_mark_node
;
9125 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9127 error ("declaration of %qD as parameter", dname
);
9128 return error_mark_node
;
9132 /* Anything declared one level down from the top level
9133 must be one of the parameters of a function
9134 (because the body is at least two levels down). */
9136 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9137 by not allowing C++ class definitions to specify their parameters
9138 with xdecls (must be spec.d in the parmlist).
9140 Since we now wait to push a class scope until we are sure that
9141 we are in a legitimate method context, we must set oldcname
9142 explicitly (since current_class_name is not yet alive).
9144 We also want to avoid calling this a PARM if it is in a namespace. */
9146 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9148 cp_binding_level
*b
= current_binding_level
;
9149 current_binding_level
= b
->level_chain
;
9150 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9151 decl_context
= PARM
;
9152 current_binding_level
= b
;
9156 name
= decl_context
== PARM
? "parameter" : "type name";
9158 if (constexpr_p
&& typedef_p
)
9160 error ("%<constexpr%> cannot appear in a typedef declaration");
9161 return error_mark_node
;
9164 /* If there were multiple types specified in the decl-specifier-seq,
9165 issue an error message. */
9166 if (declspecs
->multiple_types_p
)
9168 error ("two or more data types in declaration of %qs", name
);
9169 return error_mark_node
;
9172 if (declspecs
->conflicting_specifiers_p
)
9174 error ("conflicting specifiers in declaration of %qs", name
);
9175 return error_mark_node
;
9178 /* Extract the basic type from the decl-specifier-seq. */
9179 type
= declspecs
->type
;
9180 if (type
== error_mark_node
)
9183 type_was_error_mark_node
= true;
9185 /* If the entire declaration is itself tagged as deprecated then
9186 suppress reports of deprecated items. */
9187 if (type
&& TREE_DEPRECATED (type
)
9188 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9189 warn_deprecated_use (type
, NULL_TREE
);
9190 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9192 typedef_decl
= type
;
9193 type
= TREE_TYPE (typedef_decl
);
9194 if (TREE_DEPRECATED (type
)
9195 && DECL_ARTIFICIAL (typedef_decl
)
9196 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9197 warn_deprecated_use (type
, NULL_TREE
);
9199 /* No type at all: default to `int', and set DEFAULTED_INT
9200 because it was not a user-defined typedef. */
9201 if (type
== NULL_TREE
)
9203 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9205 /* These imply 'int'. */
9206 type
= integer_type_node
;
9209 /* If we just have "complex", it is equivalent to "complex double". */
9210 else if (!longlong
&& !explicit_intN
9211 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9213 type
= double_type_node
;
9214 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9215 "ISO C++ does not support plain %<complex%> meaning "
9216 "%<double complex%>");
9220 explicit_int
= declspecs
->explicit_int_p
;
9221 explicit_char
= declspecs
->explicit_char_p
;
9224 /* See the code below that used this. */
9226 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9228 typedef_type
= type
;
9231 if (sfk
!= sfk_conversion
)
9232 ctor_return_type
= ctype
;
9234 if (sfk
!= sfk_none
)
9235 type
= check_special_function_return_type (sfk
, type
,
9237 else if (type
== NULL_TREE
)
9243 /* We handle `main' specially here, because 'main () { }' is so
9244 common. With no options, it is allowed. With -Wreturn-type,
9245 it is a warning. It is only an error with -pedantic-errors. */
9246 is_main
= (funcdef_flag
9247 && dname
&& identifier_p (dname
)
9248 && MAIN_NAME_P (dname
)
9249 && ctype
== NULL_TREE
9250 && in_namespace
== NULL_TREE
9251 && current_namespace
== global_namespace
);
9253 if (type_was_error_mark_node
)
9254 /* We've already issued an error, don't complain more. */;
9255 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9256 /* Allow it, sigh. */;
9258 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9260 pedwarn (input_location
, OPT_Wpedantic
,
9261 "ISO C++ forbids declaration of %qs with no type", name
);
9263 warning (OPT_Wreturn_type
,
9264 "ISO C++ forbids declaration of %qs with no type", name
);
9266 type
= integer_type_node
;
9273 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9275 error ("%<__int%d%> is not supported by this target",
9276 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9277 explicit_intN
= false;
9279 else if (pedantic
&& ! in_system_header_at (input_location
))
9280 pedwarn (input_location
, OPT_Wpedantic
,
9281 "ISO C++ does not support %<__int%d%> for %qs",
9282 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9285 /* Now process the modifiers that were specified
9286 and check for invalid combinations. */
9288 /* Long double is a special combination. */
9289 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9292 type
= cp_build_qualified_type (long_double_type_node
,
9293 cp_type_quals (type
));
9296 /* Check all other uses of type modifiers. */
9298 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9302 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9303 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9304 else if (signed_p
&& unsigned_p
)
9305 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9306 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9307 error ("%<long long%> invalid for %qs", name
);
9308 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9309 error ("%<long%> invalid for %qs", name
);
9310 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9311 error ("%<short%> invalid for %qs", name
);
9312 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9313 error ("%<long%> or %<short%> invalid for %qs", name
);
9314 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9315 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9316 else if ((long_p
|| short_p
) && explicit_char
)
9317 error ("%<long%> or %<short%> specified with char for %qs", name
);
9318 else if (long_p
&& short_p
)
9319 error ("%<long%> and %<short%> specified together for %qs", name
);
9320 else if (type
== char16_type_node
|| type
== char32_type_node
)
9322 if (signed_p
|| unsigned_p
)
9323 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9324 else if (short_p
|| long_p
)
9325 error ("%<short%> or %<long%> invalid for %qs", name
);
9330 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9332 pedwarn (input_location
, OPT_Wpedantic
,
9333 "long, short, signed or unsigned used invalidly for %qs",
9335 if (flag_pedantic_errors
)
9340 /* Discard the type modifiers if they are invalid. */
9351 /* Decide whether an integer type is signed or not.
9352 Optionally treat bitfields as signed by default. */
9356 It is implementation-defined whether a plain (neither
9357 explicitly signed or unsigned) char, short, int, or long
9358 bit-field is signed or unsigned.
9360 Naturally, we extend this to long long as well. Note that
9361 this does not include wchar_t. */
9362 || (bitfield
&& !flag_signed_bitfields
9364 /* A typedef for plain `int' without `signed' can be
9365 controlled just like plain `int', but a typedef for
9366 `signed int' cannot be so controlled. */
9368 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9369 && TREE_CODE (type
) == INTEGER_TYPE
9370 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9373 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9375 type
= long_long_unsigned_type_node
;
9377 type
= long_unsigned_type_node
;
9379 type
= short_unsigned_type_node
;
9380 else if (type
== char_type_node
)
9381 type
= unsigned_char_type_node
;
9382 else if (typedef_decl
)
9383 type
= unsigned_type_for (type
);
9385 type
= unsigned_type_node
;
9387 else if (signed_p
&& type
== char_type_node
)
9388 type
= signed_char_type_node
;
9389 else if (explicit_intN
)
9390 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9392 type
= long_long_integer_type_node
;
9394 type
= long_integer_type_node
;
9396 type
= short_integer_type_node
;
9398 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9400 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9401 error ("complex invalid for %qs", name
);
9402 /* If a modifier is specified, the resulting complex is the complex
9403 form of TYPE. E.g, "complex short" is "complex short int". */
9404 else if (type
== integer_type_node
)
9405 type
= complex_integer_type_node
;
9406 else if (type
== float_type_node
)
9407 type
= complex_float_type_node
;
9408 else if (type
== double_type_node
)
9409 type
= complex_double_type_node
;
9410 else if (type
== long_double_type_node
)
9411 type
= complex_long_double_type_node
;
9413 type
= build_complex_type (type
);
9416 type_quals
= TYPE_UNQUALIFIED
;
9417 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9418 type_quals
|= TYPE_QUAL_CONST
;
9419 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9420 type_quals
|= TYPE_QUAL_VOLATILE
;
9421 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9422 type_quals
|= TYPE_QUAL_RESTRICT
;
9423 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9424 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9427 /* If we're using the injected-class-name to form a compound type or a
9428 declaration, replace it with the underlying class so we don't get
9429 redundant typedefs in the debug output. But if we are returning the
9430 type unchanged, leave it alone so that it's available to
9431 maybe_get_template_decl_from_type_decl. */
9432 if (CLASS_TYPE_P (type
)
9433 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9434 && type
== TREE_TYPE (TYPE_NAME (type
))
9435 && (declarator
|| type_quals
))
9436 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9438 type_quals
|= cp_type_quals (type
);
9439 type
= cp_build_qualified_type_real
9440 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9441 || declspecs
->decltype_p
)
9442 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9443 /* We might have ignored or rejected some of the qualifiers. */
9444 type_quals
= cp_type_quals (type
);
9447 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9448 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9449 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9451 storage_class
= declspecs
->storage_class
;
9452 if (storage_class
== sc_static
)
9453 staticp
= 1 + (decl_context
== FIELD
);
9455 if (virtualp
&& staticp
== 2)
9457 error ("member %qD cannot be declared both virtual and static", dname
);
9458 storage_class
= sc_none
;
9461 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9463 /* Issue errors about use of storage classes for parameters. */
9464 if (decl_context
== PARM
)
9468 error ("typedef declaration invalid in parameter declaration");
9469 return error_mark_node
;
9471 else if (template_parm_flag
&& storage_class
!= sc_none
)
9473 error ("storage class specified for template parameter %qs", name
);
9474 return error_mark_node
;
9476 else if (storage_class
== sc_static
9477 || storage_class
== sc_extern
9479 error ("storage class specifiers invalid in parameter declarations");
9481 /* Function parameters cannot be constexpr. If we saw one, moan
9482 and pretend it wasn't there. */
9485 error ("a parameter cannot be declared %<constexpr%>");
9490 /* Give error if `virtual' is used outside of class declaration. */
9492 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9494 error ("%<virtual%> outside class declaration");
9498 /* Static anonymous unions are dealt with here. */
9499 if (staticp
&& decl_context
== TYPENAME
9501 && ANON_AGGR_TYPE_P (declspecs
->type
))
9502 decl_context
= FIELD
;
9504 /* Warn about storage classes that are invalid for certain
9505 kinds of declarations (parameters, typenames, etc.). */
9508 && storage_class
!= sc_extern
9509 && storage_class
!= sc_static
)
9512 error ("multiple storage classes in declaration of %qs", name
);
9515 if (decl_context
!= NORMAL
9516 && ((storage_class
!= sc_none
9517 && storage_class
!= sc_mutable
)
9520 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9521 && (storage_class
== sc_register
9522 || storage_class
== sc_auto
))
9526 else if (decl_context
== FIELD
9527 /* C++ allows static class elements. */
9528 && storage_class
== sc_static
)
9529 /* C++ also allows inlines and signed and unsigned elements,
9530 but in those cases we don't come in here. */
9534 if (decl_context
== FIELD
)
9535 error ("storage class specified for %qs", name
);
9538 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9539 error ("storage class specified for parameter %qs", name
);
9541 error ("storage class specified for typename");
9543 if (storage_class
== sc_register
9544 || storage_class
== sc_auto
9545 || storage_class
== sc_extern
9547 storage_class
= sc_none
;
9550 else if (storage_class
== sc_extern
&& funcdef_flag
9551 && ! toplevel_bindings_p ())
9552 error ("nested function %qs declared %<extern%>", name
);
9553 else if (toplevel_bindings_p ())
9555 if (storage_class
== sc_auto
)
9556 error ("top-level declaration of %qs specifies %<auto%>", name
);
9559 && storage_class
!= sc_extern
9560 && storage_class
!= sc_static
)
9562 if (declspecs
->gnu_thread_keyword_p
)
9563 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9564 "declared %<__thread%>", name
);
9566 /* When thread_local is applied to a variable of block scope the
9567 storage-class-specifier static is implied if it does not appear
9569 storage_class
= declspecs
->storage_class
= sc_static
;
9573 if (storage_class
&& friendp
)
9575 error ("storage class specifiers invalid in friend function declarations");
9576 storage_class
= sc_none
;
9581 unqualified_id
= NULL_TREE
;
9584 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9585 switch (TREE_CODE (unqualified_id
))
9588 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9589 if (TYPE_P (unqualified_id
))
9590 unqualified_id
= constructor_name (unqualified_id
);
9593 case IDENTIFIER_NODE
:
9594 case TEMPLATE_ID_EXPR
:
9602 if (declspecs
->std_attributes
)
9604 /* Apply the c++11 attributes to the type preceding them. */
9605 input_location
= declspecs
->locations
[ds_std_attribute
];
9606 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9607 input_location
= saved_loc
;
9610 /* Determine the type of the entity declared by recurring on the
9612 for (; declarator
; declarator
= declarator
->declarator
)
9614 const cp_declarator
*inner_declarator
;
9617 if (type
== error_mark_node
)
9618 return error_mark_node
;
9620 attrs
= declarator
->attributes
;
9626 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9627 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9628 if (declarator
->kind
== cdk_function
)
9629 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9630 if (declarator
->kind
== cdk_array
)
9631 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9632 returned_attrs
= decl_attributes (&type
,
9633 chainon (returned_attrs
, attrs
),
9637 if (declarator
->kind
== cdk_id
)
9640 inner_declarator
= declarator
->declarator
;
9642 switch (declarator
->kind
)
9645 type
= create_array_type_for_decl (dname
, type
,
9646 declarator
->u
.array
.bounds
);
9647 if (declarator
->std_attributes
)
9650 The optional attribute-specifier-seq appertains to the
9652 returned_attrs
= chainon (returned_attrs
,
9653 declarator
->std_attributes
);
9661 /* Declaring a function type.
9662 Make sure we have a valid type for the function to return. */
9664 if (type_quals
!= TYPE_UNQUALIFIED
)
9666 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9667 warning (OPT_Wignored_qualifiers
,
9668 "type qualifiers ignored on function return type");
9669 /* We now know that the TYPE_QUALS don't apply to the
9670 decl, but to its return type. */
9671 type_quals
= TYPE_UNQUALIFIED
;
9673 errmsg
= targetm
.invalid_return_type (type
);
9677 type
= integer_type_node
;
9680 /* Error about some types functions can't return. */
9682 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9684 error ("%qs declared as function returning a function", name
);
9685 return error_mark_node
;
9687 if (TREE_CODE (type
) == ARRAY_TYPE
)
9689 error ("%qs declared as function returning an array", name
);
9690 return error_mark_node
;
9693 input_location
= declspecs
->locations
[ds_type_spec
];
9694 abstract_virtuals_error (ACU_RETURN
, type
);
9695 input_location
= saved_loc
;
9697 /* Pick up type qualifiers which should be applied to `this'. */
9698 memfn_quals
= declarator
->u
.function
.qualifiers
;
9699 /* Pick up virt-specifiers. */
9700 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9701 /* And ref-qualifier, too */
9702 rqual
= declarator
->u
.function
.ref_qualifier
;
9703 /* Pick up the exception specifications. */
9704 raises
= declarator
->u
.function
.exception_specification
;
9705 /* If the exception-specification is ill-formed, let's pretend
9706 there wasn't one. */
9707 if (raises
== error_mark_node
)
9710 /* Say it's a definition only for the CALL_EXPR
9711 closest to the identifier. */
9712 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9714 /* Handle a late-specified return type. */
9717 if (type_uses_auto (type
))
9719 if (!declarator
->u
.function
.late_return_type
)
9721 if (current_class_type
9722 && LAMBDA_TYPE_P (current_class_type
))
9723 /* OK for C++11 lambdas. */;
9724 else if (cxx_dialect
< cxx14
)
9726 error ("%qs function uses "
9727 "%<auto%> type specifier without trailing "
9728 "return type", name
);
9729 inform (input_location
, "deduced return type "
9730 "only available with -std=c++14 or "
9735 error ("virtual function cannot "
9736 "have deduced return type");
9740 else if (!is_auto (type
))
9742 error ("%qs function with trailing return type has"
9743 " %qT as its type rather than plain %<auto%>",
9745 return error_mark_node
;
9748 else if (declarator
->u
.function
.late_return_type
)
9750 if (cxx_dialect
< cxx11
)
9751 /* Not using maybe_warn_cpp0x because this should
9752 always be an error. */
9753 error ("trailing return type only available with "
9754 "-std=c++11 or -std=gnu++11");
9756 error ("%qs function with trailing return type not "
9757 "declared with %<auto%> type specifier", name
);
9758 return error_mark_node
;
9761 type
= splice_late_return_type
9762 (type
, declarator
->u
.function
.late_return_type
);
9763 if (type
== error_mark_node
)
9764 return error_mark_node
;
9766 if (declarator
->u
.function
.late_return_type
)
9767 late_return_type_p
= true;
9769 if (ctype
== NULL_TREE
9770 && decl_context
== FIELD
9773 ctype
= current_class_type
;
9775 if (ctype
&& (sfk
== sfk_constructor
9776 || sfk
== sfk_destructor
))
9778 /* We are within a class's scope. If our declarator name
9779 is the same as the class name, and we are defining
9780 a function, then it is a constructor/destructor, and
9781 therefore returns a void type. */
9783 /* ISO C++ 12.4/2. A destructor may not be declared
9784 const or volatile. A destructor may not be static.
9785 A destructor may not be declared with ref-qualifier.
9787 ISO C++ 12.1. A constructor may not be declared
9788 const or volatile. A constructor may not be
9789 virtual. A constructor may not be static.
9790 A constructor may not be declared with ref-qualifier. */
9792 error ((flags
== DTOR_FLAG
)
9793 ? G_("destructor cannot be static member function")
9794 : G_("constructor cannot be static member function"));
9797 error ((flags
== DTOR_FLAG
)
9798 ? G_("destructors may not be cv-qualified")
9799 : G_("constructors may not be cv-qualified"));
9800 memfn_quals
= TYPE_UNQUALIFIED
;
9805 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9806 error ((flags
== DTOR_FLAG
)
9807 ? "destructors may not be ref-qualified"
9808 : "constructors may not be ref-qualified");
9809 rqual
= REF_QUAL_NONE
;
9812 if (decl_context
== FIELD
9813 && !member_function_or_else (ctype
,
9816 return error_mark_node
;
9818 if (flags
!= DTOR_FLAG
)
9820 /* It's a constructor. */
9825 permerror (input_location
, "constructors cannot be declared virtual");
9828 if (decl_context
== FIELD
9829 && sfk
!= sfk_constructor
)
9830 return error_mark_node
;
9832 if (decl_context
== FIELD
)
9839 /* Cannot be both friend and virtual. */
9840 error ("virtual functions cannot be friends");
9843 if (decl_context
== NORMAL
)
9844 error ("friend declaration not in class definition");
9845 if (current_function_decl
&& funcdef_flag
)
9846 error ("can%'t define friend function %qs in a local "
9850 else if (ctype
&& sfk
== sfk_conversion
)
9854 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9859 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9862 if (inner_declarator
9863 && inner_declarator
->kind
== cdk_id
9864 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9865 && arg_types
!= void_list_node
)
9867 error ("destructors may not have parameters");
9868 arg_types
= void_list_node
;
9872 type
= build_function_type (type
, arg_types
);
9873 if (declarator
->std_attributes
)
9876 The optional attribute-specifier-seq appertains to
9877 the function type. */
9878 decl_attributes (&type
, declarator
->std_attributes
,
9886 /* Filter out pointers-to-references and references-to-references.
9887 We can get these if a TYPE_DECL is used. */
9889 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9891 if (declarator
->kind
!= cdk_reference
)
9893 error ("cannot declare pointer to %q#T", type
);
9894 type
= TREE_TYPE (type
);
9897 /* In C++0x, we allow reference to reference declarations
9898 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9899 and template type arguments [14.3.1/4 temp.arg.type]. The
9900 check for direct reference to reference declarations, which
9901 are still forbidden, occurs below. Reasoning behind the change
9902 can be found in DR106, DR540, and the rvalue reference
9904 else if (cxx_dialect
== cxx98
)
9906 error ("cannot declare reference to %q#T", type
);
9907 type
= TREE_TYPE (type
);
9910 else if (VOID_TYPE_P (type
))
9912 if (declarator
->kind
== cdk_reference
)
9913 error ("cannot declare reference to %q#T", type
);
9914 else if (declarator
->kind
== cdk_ptrmem
)
9915 error ("cannot declare pointer to %q#T member", type
);
9918 /* We now know that the TYPE_QUALS don't apply to the decl,
9919 but to the target of the pointer. */
9920 type_quals
= TYPE_UNQUALIFIED
;
9922 /* This code used to handle METHOD_TYPE, but I don't think it's
9923 possible to get it here anymore. */
9924 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9925 if (declarator
->kind
== cdk_ptrmem
9926 && TREE_CODE (type
) == FUNCTION_TYPE
)
9928 memfn_quals
|= type_memfn_quals (type
);
9929 type
= build_memfn_type (type
,
9930 declarator
->u
.pointer
.class_type
,
9933 if (type
== error_mark_node
)
9934 return error_mark_node
;
9936 rqual
= REF_QUAL_NONE
;
9937 memfn_quals
= TYPE_UNQUALIFIED
;
9940 if (TREE_CODE (type
) == FUNCTION_TYPE
9941 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9942 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9943 error (declarator
->kind
== cdk_reference
9944 ? G_("cannot declare reference to qualified function type %qT")
9945 : G_("cannot declare pointer to qualified function type %qT"),
9948 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
9949 && (flag_iso
|| warn_vla
> 0))
9950 pedwarn (input_location
, OPT_Wvla
,
9951 declarator
->kind
== cdk_reference
9952 ? G_("reference to array of runtime bound")
9953 : G_("pointer to array of runtime bound"));
9955 /* When the pointed-to type involves components of variable size,
9956 care must be taken to ensure that the size evaluation code is
9957 emitted early enough to dominate all the possible later uses
9958 and late enough for the variables on which it depends to have
9961 This is expected to happen automatically when the pointed-to
9962 type has a name/declaration of it's own, but special attention
9963 is required if the type is anonymous.
9965 We handle the NORMAL and FIELD contexts here by inserting a
9966 dummy statement that just evaluates the size at a safe point
9967 and ensures it is not deferred until e.g. within a deeper
9968 conditional context (c++/43555).
9970 We expect nothing to be needed here for PARM or TYPENAME.
9971 Evaluating the size at this point for TYPENAME would
9972 actually be incorrect, as we might be in the middle of an
9973 expression with side effects on the pointed-to type size
9974 "arguments" prior to the pointer declaration point and the
9975 size evaluation could end up prior to the side effects. */
9977 if (!TYPE_NAME (type
)
9978 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9979 && at_function_scope_p ()
9980 && variably_modified_type_p (type
, NULL_TREE
))
9981 /* Force evaluation of the SAVE_EXPR. */
9982 finish_expr_stmt (TYPE_SIZE (type
));
9984 if (declarator
->kind
== cdk_reference
)
9986 /* In C++0x, the type we are creating a reference to might be
9987 a typedef which is itself a reference type. In that case,
9988 we follow the reference collapsing rules in
9989 [7.1.3/8 dcl.typedef] to create the final reference type:
9991 "If a typedef TD names a type that is a reference to a type
9992 T, an attempt to create the type 'lvalue reference to cv TD'
9993 creates the type 'lvalue reference to T,' while an attempt
9994 to create the type "rvalue reference to cv TD' creates the
9997 if (VOID_TYPE_P (type
))
9998 /* We already gave an error. */;
9999 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10001 if (declarator
->u
.reference
.rvalue_ref
)
10002 /* Leave type alone. */;
10004 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10007 type
= cp_build_reference_type
10008 (type
, declarator
->u
.reference
.rvalue_ref
);
10010 /* In C++0x, we need this check for direct reference to
10011 reference declarations, which are forbidden by
10012 [8.3.2/5 dcl.ref]. Reference to reference declarations
10013 are only allowed indirectly through typedefs and template
10014 type arguments. Example:
10016 void foo(int & &); // invalid ref-to-ref decl
10018 typedef int & int_ref;
10019 void foo(int_ref &); // valid ref-to-ref decl
10021 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10022 error ("cannot declare reference to %q#T, which is not "
10023 "a typedef or a template type argument", type
);
10025 else if (TREE_CODE (type
) == METHOD_TYPE
)
10026 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10027 else if (declarator
->kind
== cdk_ptrmem
)
10029 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10030 != NAMESPACE_DECL
);
10031 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10032 /* We will already have complained. */
10033 type
= error_mark_node
;
10035 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10039 type
= build_pointer_type (type
);
10041 /* Process a list of type modifier keywords (such as
10042 const or volatile) that were given inside the `*' or `&'. */
10044 if (declarator
->u
.pointer
.qualifiers
)
10047 = cp_build_qualified_type (type
,
10048 declarator
->u
.pointer
.qualifiers
);
10049 type_quals
= cp_type_quals (type
);
10052 /* Apply C++11 attributes to the pointer, and not to the
10053 type pointed to. This is unlike what is done for GNU
10054 attributes above. It is to comply with [dcl.ptr]/1:
10056 [the optional attribute-specifier-seq (7.6.1) appertains
10057 to the pointer and not to the object pointed to]. */
10058 if (declarator
->std_attributes
)
10059 decl_attributes (&type
, declarator
->std_attributes
,
10069 gcc_unreachable ();
10073 /* A `constexpr' specifier used in an object declaration declares
10074 the object as `const'. */
10075 if (constexpr_p
&& innermost_code
!= cdk_function
)
10077 if (type_quals
& TYPE_QUAL_VOLATILE
)
10078 error ("both %<volatile%> and %<constexpr%> cannot be used here");
10079 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10081 type_quals
|= TYPE_QUAL_CONST
;
10082 type
= cp_build_qualified_type (type
, type_quals
);
10086 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10087 && TREE_CODE (type
) != FUNCTION_TYPE
10088 && TREE_CODE (type
) != METHOD_TYPE
10089 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10091 error ("template-id %qD used as a declarator",
10093 unqualified_id
= dname
;
10096 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10097 qualified with a class-name, turn it into a METHOD_TYPE, unless
10098 we know that the function is static. We take advantage of this
10099 opportunity to do other processing that pertains to entities
10100 explicitly declared to be class members. Note that if DECLARATOR
10101 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10102 would not have exited the loop above. */
10104 && declarator
->u
.id
.qualifying_scope
10105 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10107 ctype
= declarator
->u
.id
.qualifying_scope
;
10108 ctype
= TYPE_MAIN_VARIANT (ctype
);
10109 template_count
= num_template_headers_for_class (ctype
);
10111 if (ctype
== current_class_type
)
10115 permerror (input_location
, "member functions are implicitly friends of their class");
10119 permerror (declarator
->id_loc
,
10120 "extra qualification %<%T::%> on member %qs",
10123 else if (/* If the qualifying type is already complete, then we
10124 can skip the following checks. */
10125 !COMPLETE_TYPE_P (ctype
)
10126 && (/* If the function is being defined, then
10127 qualifying type must certainly be complete. */
10129 /* A friend declaration of "T::f" is OK, even if
10130 "T" is a template parameter. But, if this
10131 function is not a friend, the qualifying type
10132 must be a class. */
10133 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10134 /* For a declaration, the type need not be
10135 complete, if either it is dependent (since there
10136 is no meaningful definition of complete in that
10137 case) or the qualifying class is currently being
10139 || !(dependent_type_p (ctype
)
10140 || currently_open_class (ctype
)))
10141 /* Check that the qualifying type is complete. */
10142 && !complete_type_or_else (ctype
, NULL_TREE
))
10143 return error_mark_node
;
10144 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10146 if (current_class_type
10147 && (!friendp
|| funcdef_flag
))
10149 error (funcdef_flag
10150 ? G_("cannot define member function %<%T::%s%> "
10152 : G_("cannot declare member function %<%T::%s%> "
10154 ctype
, name
, current_class_type
);
10155 return error_mark_node
;
10158 else if (typedef_p
&& current_class_type
)
10160 error ("cannot declare member %<%T::%s%> within %qT",
10161 ctype
, name
, current_class_type
);
10162 return error_mark_node
;
10166 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10167 ctype
= current_class_type
;
10169 /* Now TYPE has the actual type. */
10171 if (returned_attrs
)
10174 *attrlist
= chainon (returned_attrs
, *attrlist
);
10176 attrlist
= &returned_attrs
;
10180 && declarator
->kind
== cdk_id
10181 && declarator
->std_attributes
)
10182 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10183 a declarator-id appertains to the entity that is declared. */
10184 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10186 /* Handle parameter packs. */
10187 if (parameter_pack_p
)
10189 if (decl_context
== PARM
)
10190 /* Turn the type into a pack expansion.*/
10191 type
= make_pack_expansion (type
);
10193 error ("non-parameter %qs cannot be a parameter pack", name
);
10196 /* Did array size calculations overflow or does the array cover more
10197 than half of the address-space? */
10198 if (TREE_CODE (type
) == ARRAY_TYPE
10199 && COMPLETE_TYPE_P (type
)
10200 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10201 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10203 error ("size of array %qs is too large", name
);
10204 /* If we proceed with the array type as it is, we'll eventually
10205 crash in tree_to_[su]hwi(). */
10206 type
= error_mark_node
;
10209 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10210 && !processing_template_decl
10211 && variably_modified_type_p (type
, NULL_TREE
))
10213 if (decl_context
== FIELD
)
10214 error ("data member may not have variably modified type %qT", type
);
10216 error ("parameter may not have variably modified type %qT", type
);
10217 type
= error_mark_node
;
10220 if (explicitp
== 1 || (explicitp
&& friendp
))
10222 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10223 in the declaration of a constructor or conversion function within
10224 a class definition. */
10225 if (!current_class_type
)
10226 error ("%<explicit%> outside class declaration");
10228 error ("%<explicit%> in friend declaration");
10230 error ("only declarations of constructors and conversion operators "
10231 "can be %<explicit%>");
10235 if (storage_class
== sc_mutable
)
10237 if (decl_context
!= FIELD
|| friendp
)
10239 error ("non-member %qs cannot be declared %<mutable%>", name
);
10240 storage_class
= sc_none
;
10242 else if (decl_context
== TYPENAME
|| typedef_p
)
10244 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10245 storage_class
= sc_none
;
10247 else if (TREE_CODE (type
) == FUNCTION_TYPE
10248 || TREE_CODE (type
) == METHOD_TYPE
)
10250 error ("function %qs cannot be declared %<mutable%>", name
);
10251 storage_class
= sc_none
;
10255 error ("static %qs cannot be declared %<mutable%>", name
);
10256 storage_class
= sc_none
;
10258 else if (type_quals
& TYPE_QUAL_CONST
)
10260 error ("const %qs cannot be declared %<mutable%>", name
);
10261 storage_class
= sc_none
;
10263 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10265 permerror (input_location
, "reference %qs cannot be declared "
10266 "%<mutable%>", name
);
10267 storage_class
= sc_none
;
10271 /* If this is declaring a typedef name, return a TYPE_DECL. */
10272 if (typedef_p
&& decl_context
!= TYPENAME
)
10276 /* Note that the grammar rejects storage classes
10277 in typenames, fields or parameters. */
10278 if (current_lang_name
== lang_name_java
)
10279 TYPE_FOR_JAVA (type
) = 1;
10281 /* This declaration:
10283 typedef void f(int) const;
10285 declares a function type which is not a member of any
10286 particular class, but which is cv-qualified; for
10287 example "f S::*" declares a pointer to a const-qualified
10288 member function of S. We record the cv-qualification in the
10290 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10292 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10294 /* We have now dealt with these qualifiers. */
10295 memfn_quals
= TYPE_UNQUALIFIED
;
10296 rqual
= REF_QUAL_NONE
;
10299 if (type_uses_auto (type
))
10301 error ("typedef declared %<auto%>");
10302 type
= error_mark_node
;
10305 if (cxx_dialect
>= cxx14
&& array_of_runtime_bound_p (type
)
10306 && (flag_iso
|| warn_vla
> 0))
10307 pedwarn (input_location
, OPT_Wvla
,
10308 "typedef naming array of runtime bound");
10310 if (decl_context
== FIELD
)
10311 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10313 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10314 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10315 error_at (DECL_SOURCE_LOCATION (decl
),
10316 "typedef name may not be a nested-name-specifier");
10317 TREE_TYPE (decl
) = error_mark_node
;
10320 if (decl_context
!= FIELD
)
10322 if (!current_function_decl
)
10323 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10324 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10325 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10326 (current_function_decl
)))
10327 /* The TYPE_DECL is "abstract" because there will be
10328 clones of this constructor/destructor, and there will
10329 be copies of this TYPE_DECL generated in those
10330 clones. The decloning optimization (for space) may
10331 revert this subsequently if it determines that
10332 the clones should share a common implementation. */
10333 DECL_ABSTRACT_P (decl
) = true;
10335 else if (current_class_type
10336 && constructor_name_p (unqualified_id
, current_class_type
))
10337 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10338 "as enclosing class",
10341 /* If the user declares "typedef struct {...} foo" then the
10342 struct will have an anonymous name. Fill that name in now.
10343 Nothing can refer to it, so nothing needs know about the name
10345 if (type
!= error_mark_node
10347 && TYPE_NAME (type
)
10348 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10349 && TYPE_ANONYMOUS_P (type
)
10350 && declspecs
->type_definition_p
10351 && attributes_naming_typedef_ok (*attrlist
)
10352 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10356 /* Replace the anonymous name with the real name everywhere. */
10357 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10359 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10360 /* We do not rename the debug info representing the
10361 anonymous tagged type because the standard says in
10362 [dcl.typedef] that the naming applies only for
10363 linkage purposes. */
10364 /*debug_hooks->set_name (t, decl);*/
10365 TYPE_NAME (t
) = decl
;
10368 if (TYPE_LANG_SPECIFIC (type
))
10369 TYPE_WAS_ANONYMOUS (type
) = 1;
10371 /* If this is a typedef within a template class, the nested
10372 type is a (non-primary) template. The name for the
10373 template needs updating as well. */
10374 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10375 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10376 = TYPE_IDENTIFIER (type
);
10378 /* Adjust linkage now that we aren't anonymous anymore. */
10379 reset_type_linkage (type
);
10381 /* FIXME remangle member functions; member functions of a
10382 type with external linkage have external linkage. */
10386 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10387 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10389 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10390 memfn_quals
!= TYPE_UNQUALIFIED
,
10391 inlinep
, friendp
, raises
!= NULL_TREE
);
10393 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10394 /* Acknowledge that this was written:
10395 `using analias = atype;'. */
10396 TYPE_DECL_ALIAS_P (decl
) = 1;
10401 /* Detect the case of an array type of unspecified size
10402 which came, as such, direct from a typedef name.
10403 We must copy the type, so that the array's domain can be
10404 individually set by the object's initializer. */
10406 if (type
&& typedef_type
10407 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10408 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10409 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10411 /* Detect where we're using a typedef of function type to declare a
10412 function. PARMS will not be set, so we must create it now. */
10414 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10416 tree decls
= NULL_TREE
;
10419 for (args
= TYPE_ARG_TYPES (type
);
10420 args
&& args
!= void_list_node
;
10421 args
= TREE_CHAIN (args
))
10423 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10425 DECL_CHAIN (decl
) = decls
;
10429 parms
= nreverse (decls
);
10431 if (decl_context
!= TYPENAME
)
10433 /* The qualifiers on the function type become the qualifiers on
10434 the non-static member function. */
10435 memfn_quals
|= type_memfn_quals (type
);
10436 rqual
= type_memfn_rqual (type
);
10437 type_quals
= TYPE_UNQUALIFIED
;
10441 /* If this is a type name (such as, in a cast or sizeof),
10442 compute the type and return it now. */
10444 if (decl_context
== TYPENAME
)
10446 /* Note that the grammar rejects storage classes
10447 in typenames, fields or parameters. */
10448 if (type_quals
!= TYPE_UNQUALIFIED
)
10449 type_quals
= TYPE_UNQUALIFIED
;
10451 /* Special case: "friend class foo" looks like a TYPENAME context. */
10454 if (type_quals
!= TYPE_UNQUALIFIED
)
10456 error ("type qualifiers specified for friend class declaration");
10457 type_quals
= TYPE_UNQUALIFIED
;
10461 error ("%<inline%> specified for friend class declaration");
10467 /* Don't allow friend declaration without a class-key. */
10468 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10469 permerror (input_location
, "template parameters cannot be friends");
10470 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10471 permerror (input_location
, "friend declaration requires class-key, "
10472 "i.e. %<friend class %T::%D%>",
10473 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10475 permerror (input_location
, "friend declaration requires class-key, "
10476 "i.e. %<friend %#T%>",
10480 /* Only try to do this stuff if we didn't already give up. */
10481 if (type
!= integer_type_node
)
10483 /* A friendly class? */
10484 if (current_class_type
)
10485 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10486 /*complain=*/true);
10488 error ("trying to make class %qT a friend of global scope",
10491 type
= void_type_node
;
10494 else if (memfn_quals
|| rqual
)
10496 if (ctype
== NULL_TREE
10497 && TREE_CODE (type
) == METHOD_TYPE
)
10498 ctype
= TYPE_METHOD_BASETYPE (type
);
10501 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10502 /* Core issue #547: need to allow this in template type args.
10503 Allow it in general in C++11 for alias-declarations. */
10504 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10505 && TREE_CODE (type
) == FUNCTION_TYPE
)
10506 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10508 error ("invalid qualifiers on non-member function type");
10513 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10514 && decl_context
!= CATCHPARM
10515 && TREE_CODE (type
) != UNION_TYPE
10518 error ("abstract declarator %qT used as declaration", type
);
10519 return error_mark_node
;
10522 /* Only functions may be declared using an operator-function-id. */
10524 && IDENTIFIER_OPNAME_P (unqualified_id
)
10525 && TREE_CODE (type
) != FUNCTION_TYPE
10526 && TREE_CODE (type
) != METHOD_TYPE
)
10528 error ("declaration of %qD as non-function", unqualified_id
);
10529 return error_mark_node
;
10532 /* We don't check parameter types here because we can emit a better
10533 error message later. */
10534 if (decl_context
!= PARM
)
10536 type
= check_var_type (unqualified_id
, type
);
10537 if (type
== error_mark_node
)
10538 return error_mark_node
;
10541 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10542 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10544 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10546 if (ctype
|| in_namespace
)
10547 error ("cannot use %<::%> in parameter declaration");
10549 if (type_uses_auto (type
))
10551 if (cxx_dialect
>= cxx14
)
10552 error ("%<auto%> parameter not permitted in this context");
10554 error ("parameter declared %<auto%>");
10555 type
= error_mark_node
;
10558 /* A parameter declared as an array of T is really a pointer to T.
10559 One declared as a function is really a pointer to a function.
10560 One declared as a member is really a pointer to member. */
10562 if (TREE_CODE (type
) == ARRAY_TYPE
)
10564 /* Transfer const-ness of array into that of type pointed to. */
10565 type
= build_pointer_type (TREE_TYPE (type
));
10566 type_quals
= TYPE_UNQUALIFIED
;
10567 array_parameter_p
= true;
10569 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10570 type
= build_pointer_type (type
);
10573 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10574 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10576 cp_cv_quals real_quals
= memfn_quals
;
10577 if (cxx_dialect
< cxx14
&& constexpr_p
10578 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10579 real_quals
|= TYPE_QUAL_CONST
;
10580 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10586 if (decl_context
== PARM
)
10588 decl
= cp_build_parm_decl (unqualified_id
, type
);
10589 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10591 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10592 memfn_quals
!= TYPE_UNQUALIFIED
,
10593 inlinep
, friendp
, raises
!= NULL_TREE
);
10595 else if (decl_context
== FIELD
)
10597 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10598 && type_uses_auto (type
))
10600 error ("non-static data member declared %<auto%>");
10601 type
= error_mark_node
;
10604 /* The C99 flexible array extension. */
10605 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10606 && TYPE_DOMAIN (type
) == NULL_TREE
)
10608 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10609 tf_warning_or_error
);
10610 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10613 if (type
== error_mark_node
)
10615 /* Happens when declaring arrays of sizes which
10616 are error_mark_node, for example. */
10619 else if (in_namespace
&& !friendp
)
10621 /* Something like struct S { int N::j; }; */
10622 error ("invalid use of %<::%>");
10623 return error_mark_node
;
10625 else if (TREE_CODE (type
) == FUNCTION_TYPE
10626 || TREE_CODE (type
) == METHOD_TYPE
)
10629 tree function_context
;
10633 /* This should never happen in pure C++ (the check
10634 could be an assert). It could happen in
10635 Objective-C++ if someone writes invalid code that
10636 uses a function declaration for an instance
10637 variable or property (instance variables and
10638 properties are parsed as FIELD_DECLs, but they are
10639 part of an Objective-C class, not a C++ class).
10640 That code is invalid and is caught by this
10644 error ("declaration of function %qD in invalid context",
10646 return error_mark_node
;
10649 /* ``A union may [ ... ] not [ have ] virtual functions.''
10651 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10653 error ("function %qD declared virtual inside a union",
10655 return error_mark_node
;
10658 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10662 error ("%qD cannot be declared virtual, since it "
10663 "is always static",
10670 /* Check that the name used for a destructor makes sense. */
10671 if (sfk
== sfk_destructor
)
10673 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10677 gcc_assert (friendp
);
10678 error ("expected qualified name in friend declaration "
10679 "for destructor %qD", uqname
);
10680 return error_mark_node
;
10683 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10685 error ("declaration of %qD as member of %qT",
10687 return error_mark_node
;
10691 error ("a destructor cannot be %<constexpr%>");
10692 return error_mark_node
;
10695 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10697 error ("expected qualified name in friend declaration "
10698 "for constructor %qD",
10699 id_declarator
->u
.id
.unqualified_name
);
10700 return error_mark_node
;
10703 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10704 function_context
= (ctype
!= NULL_TREE
) ?
10705 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10706 publicp
= (! friendp
|| ! staticp
)
10707 && function_context
== NULL_TREE
;
10709 if (late_return_type_p
)
10710 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10712 decl
= grokfndecl (ctype
, type
,
10713 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10714 ? unqualified_id
: dname
,
10717 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10718 friendp
? -1 : 0, friendp
, publicp
,
10719 inlinep
| (2 * constexpr_p
),
10721 funcdef_flag
, template_count
, in_namespace
,
10722 attrlist
, declarator
->id_loc
);
10723 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10724 if (decl
== NULL_TREE
)
10725 return error_mark_node
;
10727 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10728 /* The decl and setting of decl_attr is also turned off. */
10729 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10732 /* [class.conv.ctor]
10734 A constructor declared without the function-specifier
10735 explicit that can be called with a single parameter
10736 specifies a conversion from the type of its first
10737 parameter to the type of its class. Such a constructor
10738 is called a converting constructor. */
10739 if (explicitp
== 2)
10740 DECL_NONCONVERTING_P (decl
) = 1;
10742 else if (!staticp
&& !dependent_type_p (type
)
10743 && !COMPLETE_TYPE_P (complete_type (type
))
10744 && (TREE_CODE (type
) != ARRAY_TYPE
10745 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10746 || initialized
== 0))
10748 if (unqualified_id
)
10750 error ("field %qD has incomplete type %qT",
10751 unqualified_id
, type
);
10752 cxx_incomplete_type_inform (strip_array_types (type
));
10755 error ("name %qT has incomplete type", type
);
10757 type
= error_mark_node
;
10764 error ("%qE is neither function nor member function; "
10765 "cannot be declared friend", unqualified_id
);
10773 /* Friends are treated specially. */
10774 if (ctype
== current_class_type
)
10775 ; /* We already issued a permerror. */
10776 else if (decl
&& DECL_NAME (decl
))
10778 if (template_class_depth (current_class_type
) == 0)
10780 decl
= check_explicit_specialization
10781 (unqualified_id
, decl
, template_count
,
10782 2 * funcdef_flag
+ 4);
10783 if (decl
== error_mark_node
)
10784 return error_mark_node
;
10787 decl
= do_friend (ctype
, unqualified_id
, decl
,
10793 return error_mark_node
;
10796 /* Structure field. It may not be a function, except for C++. */
10798 if (decl
== NULL_TREE
)
10802 /* C++ allows static class members. All other work
10803 for this is done by grokfield. */
10804 decl
= build_lang_decl_loc (declarator
10805 ? declarator
->id_loc
10807 VAR_DECL
, unqualified_id
, type
);
10808 set_linkage_for_static_data_member (decl
);
10809 /* Even if there is an in-class initialization, DECL
10810 is considered undefined until an out-of-class
10811 definition is provided. */
10812 DECL_EXTERNAL (decl
) = 1;
10816 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10817 if (declspecs
->gnu_thread_keyword_p
)
10818 DECL_GNU_TLS_P (decl
) = true;
10821 if (constexpr_p
&& !initialized
)
10823 error ("constexpr static data member %qD must have an "
10824 "initializer", decl
);
10825 constexpr_p
= false;
10832 error ("non-static data member %qE declared %<constexpr%>",
10834 constexpr_p
= false;
10836 decl
= build_decl (input_location
,
10837 FIELD_DECL
, unqualified_id
, type
);
10838 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10839 if (bitfield
&& !unqualified_id
)
10840 TREE_NO_WARNING (decl
) = 1;
10842 if (storage_class
== sc_mutable
)
10844 DECL_MUTABLE_P (decl
) = 1;
10845 storage_class
= sc_none
;
10850 /* An attempt is being made to initialize a non-static
10851 member. This is new in C++11. */
10852 maybe_warn_cpp0x (CPP0X_NSDMI
);
10854 /* If this has been parsed with static storage class, but
10855 errors forced staticp to be cleared, ensure NSDMI is
10857 if (declspecs
->storage_class
== sc_static
)
10858 DECL_INITIAL (decl
) = error_mark_node
;
10862 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10863 memfn_quals
!= TYPE_UNQUALIFIED
,
10864 inlinep
, friendp
, raises
!= NULL_TREE
);
10867 else if (TREE_CODE (type
) == FUNCTION_TYPE
10868 || TREE_CODE (type
) == METHOD_TYPE
)
10870 tree original_name
;
10873 if (!unqualified_id
)
10874 return error_mark_node
;
10876 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10877 original_name
= dname
;
10879 original_name
= unqualified_id
;
10881 if (storage_class
== sc_auto
)
10882 error ("storage class %<auto%> invalid for function %qs", name
);
10883 else if (storage_class
== sc_register
)
10884 error ("storage class %<register%> invalid for function %qs", name
);
10887 if (declspecs
->gnu_thread_keyword_p
)
10888 error ("storage class %<__thread%> invalid for function %qs",
10891 error ("storage class %<thread_local%> invalid for function %qs",
10895 if (virt_specifiers
)
10896 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10897 /* Function declaration not at top level.
10898 Storage classes other than `extern' are not allowed
10899 and `extern' makes no difference. */
10900 if (! toplevel_bindings_p ()
10901 && (storage_class
== sc_static
10902 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10905 if (storage_class
== sc_static
)
10906 pedwarn (input_location
, OPT_Wpedantic
,
10907 "%<static%> specified invalid for function %qs "
10908 "declared out of global scope", name
);
10910 pedwarn (input_location
, OPT_Wpedantic
,
10911 "%<inline%> specifier invalid for function %qs "
10912 "declared out of global scope", name
);
10915 if (ctype
== NULL_TREE
)
10919 error ("virtual non-class function %qs", name
);
10922 else if (sfk
== sfk_constructor
10923 || sfk
== sfk_destructor
)
10925 error (funcdef_flag
10926 ? G_("%qs defined in a non-class scope")
10927 : G_("%qs declared in a non-class scope"), name
);
10932 /* Record whether the function is public. */
10933 publicp
= (ctype
!= NULL_TREE
10934 || storage_class
!= sc_static
);
10936 if (late_return_type_p
)
10937 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10939 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10940 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10942 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10944 template_count
, in_namespace
, attrlist
,
10945 declarator
->id_loc
);
10946 if (decl
== NULL_TREE
)
10947 return error_mark_node
;
10951 int invalid_static
= 0;
10953 /* Don't allow a static member function in a class, and forbid
10954 declaring main to be static. */
10955 if (TREE_CODE (type
) == METHOD_TYPE
)
10957 permerror (input_location
, "cannot declare member function %qD to have "
10958 "static linkage", decl
);
10959 invalid_static
= 1;
10961 else if (current_function_decl
)
10963 /* FIXME need arm citation */
10964 error ("cannot declare static function inside another function");
10965 invalid_static
= 1;
10968 if (invalid_static
)
10971 storage_class
= sc_none
;
10977 /* It's a variable. */
10979 /* An uninitialized decl with `extern' is a reference. */
10980 decl
= grokvardecl (type
, dname
, unqualified_id
,
10983 (type_quals
& TYPE_QUAL_CONST
) != 0,
10985 ctype
? ctype
: in_namespace
);
10986 if (decl
== NULL_TREE
)
10987 return error_mark_node
;
10989 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10990 memfn_quals
!= TYPE_UNQUALIFIED
,
10991 inlinep
, friendp
, raises
!= NULL_TREE
);
10995 DECL_CONTEXT (decl
) = ctype
;
10998 permerror (input_location
, "%<static%> may not be used when defining "
10999 "(as opposed to declaring) a static data member");
11001 storage_class
= sc_none
;
11003 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11005 error ("static member %qD declared %<register%>", decl
);
11006 storage_class
= sc_none
;
11008 if (storage_class
== sc_extern
&& pedantic
)
11010 pedwarn (input_location
, OPT_Wpedantic
,
11011 "cannot explicitly declare member %q#D to have "
11012 "extern linkage", decl
);
11013 storage_class
= sc_none
;
11016 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11018 error ("declaration of constexpr variable %qD is not a definition",
11020 constexpr_p
= false;
11024 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11026 if (toplevel_bindings_p ())
11028 /* It's common practice (and completely valid) to have a const
11029 be initialized and declared extern. */
11030 if (!(type_quals
& TYPE_QUAL_CONST
))
11031 warning (0, "%qs initialized and declared %<extern%>", name
);
11035 error ("%qs has both %<extern%> and initializer", name
);
11036 return error_mark_node
;
11040 /* Record `register' declaration for warnings on &
11041 and in case doing stupid register allocation. */
11043 if (storage_class
== sc_register
)
11044 DECL_REGISTER (decl
) = 1;
11045 else if (storage_class
== sc_extern
)
11046 DECL_THIS_EXTERN (decl
) = 1;
11047 else if (storage_class
== sc_static
)
11048 DECL_THIS_STATIC (decl
) = 1;
11050 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11051 if (constexpr_p
&& VAR_P (decl
))
11052 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11054 /* Record constancy and volatility on the DECL itself . There's
11055 no need to do this when processing a template; we'll do this
11056 for the instantiated declaration based on the type of DECL. */
11057 if (!processing_template_decl
)
11058 cp_apply_type_quals_to_decl (type_quals
, decl
);
11064 /* Subroutine of start_function. Ensure that each of the parameter
11065 types (as listed in PARMS) is complete, as is required for a
11066 function definition. */
11069 require_complete_types_for_parms (tree parms
)
11071 for (; parms
; parms
= DECL_CHAIN (parms
))
11073 if (dependent_type_p (TREE_TYPE (parms
)))
11075 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11076 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11078 relayout_decl (parms
);
11079 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11082 /* grokparms or complete_type_or_else will have already issued
11084 TREE_TYPE (parms
) = error_mark_node
;
11088 /* Returns nonzero if T is a local variable. */
11091 local_variable_p (const_tree t
)
11094 /* A VAR_DECL with a context that is a _TYPE is a static data
11096 && !TYPE_P (CP_DECL_CONTEXT (t
))
11097 /* Any other non-local variable must be at namespace scope. */
11098 && !DECL_NAMESPACE_SCOPE_P (t
))
11099 || (TREE_CODE (t
) == PARM_DECL
))
11105 /* Like local_variable_p, but suitable for use as a tree-walking
11109 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11112 if (local_variable_p (*tp
)
11113 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11115 else if (TYPE_P (*tp
))
11116 *walk_subtrees
= 0;
11121 /* Check that ARG, which is a default-argument expression for a
11122 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11123 something goes wrong. DECL may also be a _TYPE node, rather than a
11124 DECL, if there is no DECL available. */
11127 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11132 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11133 /* We get a DEFAULT_ARG when looking at an in-class declaration
11134 with a default argument. Ignore the argument for now; we'll
11135 deal with it after the class is complete. */
11144 decl_type
= TREE_TYPE (decl
);
11146 if (arg
== error_mark_node
11147 || decl
== error_mark_node
11148 || TREE_TYPE (arg
) == error_mark_node
11149 || decl_type
== error_mark_node
)
11150 /* Something already went wrong. There's no need to check
11152 return error_mark_node
;
11154 /* [dcl.fct.default]
11156 A default argument expression is implicitly converted to the
11158 ++cp_unevaluated_operand
;
11159 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11161 --cp_unevaluated_operand
;
11163 if (warn_zero_as_null_pointer_constant
11164 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11165 && null_ptr_cst_p (arg
)
11166 && (complain
& tf_warning
)
11167 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11168 return nullptr_node
;
11170 /* [dcl.fct.default]
11172 Local variables shall not be used in default argument
11175 The keyword `this' shall not be used in a default argument of a
11176 member function. */
11177 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11180 if (complain
& tf_warning_or_error
)
11182 if (DECL_NAME (var
) == this_identifier
)
11183 permerror (input_location
, "default argument %qE uses %qD",
11186 error ("default argument %qE uses local variable %qD", arg
, var
);
11188 return error_mark_node
;
11195 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11198 type_is_deprecated (tree type
)
11200 enum tree_code code
;
11201 if (TREE_DEPRECATED (type
))
11203 if (TYPE_NAME (type
)
11204 && TREE_DEPRECATED (TYPE_NAME (type
)))
11207 /* Do warn about using typedefs to a deprecated class. */
11208 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11209 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11211 code
= TREE_CODE (type
);
11213 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11214 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11215 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11216 return type_is_deprecated (TREE_TYPE (type
));
11218 if (TYPE_PTRMEMFUNC_P (type
))
11219 return type_is_deprecated
11220 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11225 /* Decode the list of parameter types for a function type.
11226 Given the list of things declared inside the parens,
11227 return a list of types.
11229 If this parameter does not end with an ellipsis, we append
11232 *PARMS is set to the chain of PARM_DECLs created. */
11235 grokparms (tree parmlist
, tree
*parms
)
11237 tree result
= NULL_TREE
;
11238 tree decls
= NULL_TREE
;
11242 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11244 tree type
= NULL_TREE
;
11245 tree init
= TREE_PURPOSE (parm
);
11246 tree decl
= TREE_VALUE (parm
);
11247 const char *errmsg
;
11249 if (parm
== void_list_node
)
11252 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11255 type
= TREE_TYPE (decl
);
11256 if (VOID_TYPE_P (type
))
11258 if (same_type_p (type
, void_type_node
)
11260 && !DECL_NAME (decl
) && !result
11261 && TREE_CHAIN (parm
) == void_list_node
)
11262 /* DR 577: A parameter list consisting of a single
11263 unnamed parameter of non-dependent type 'void'. */
11265 else if (cv_qualified_p (type
))
11266 error_at (DECL_SOURCE_LOCATION (decl
),
11267 "invalid use of cv-qualified type %qT in "
11268 "parameter declaration", type
);
11270 error_at (DECL_SOURCE_LOCATION (decl
),
11271 "invalid use of type %<void%> in parameter "
11273 /* It's not a good idea to actually create parameters of
11274 type `void'; other parts of the compiler assume that a
11275 void type terminates the parameter list. */
11276 type
= error_mark_node
;
11277 TREE_TYPE (decl
) = error_mark_node
;
11280 if (type
!= error_mark_node
11281 && TYPE_FOR_JAVA (type
)
11282 && MAYBE_CLASS_TYPE_P (type
))
11284 error ("parameter %qD has Java class type", decl
);
11285 type
= error_mark_node
;
11286 TREE_TYPE (decl
) = error_mark_node
;
11290 if (type
!= error_mark_node
11291 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11294 type
= error_mark_node
;
11295 TREE_TYPE (decl
) = error_mark_node
;
11298 if (type
!= error_mark_node
)
11300 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11302 tree deptype
= type_is_deprecated (type
);
11304 warn_deprecated_use (deptype
, NULL_TREE
);
11307 /* Top-level qualifiers on the parameters are
11308 ignored for function types. */
11309 type
= cp_build_qualified_type (type
, 0);
11310 if (TREE_CODE (type
) == METHOD_TYPE
)
11312 error ("parameter %qD invalidly declared method type", decl
);
11313 type
= build_pointer_type (type
);
11314 TREE_TYPE (decl
) = type
;
11316 else if (abstract_virtuals_error (decl
, type
))
11317 any_error
= 1; /* Seems like a good idea. */
11318 else if (POINTER_TYPE_P (type
))
11320 /* [dcl.fct]/6, parameter types cannot contain pointers
11321 (references) to arrays of unknown bound. */
11322 tree t
= TREE_TYPE (type
);
11323 int ptr
= TYPE_PTR_P (type
);
11327 if (TYPE_PTR_P (t
))
11329 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11331 else if (!TYPE_DOMAIN (t
))
11335 if (TREE_CODE (t
) == ARRAY_TYPE
)
11337 ? G_("parameter %qD includes pointer to array of "
11338 "unknown bound %qT")
11339 : G_("parameter %qD includes reference to array of "
11340 "unknown bound %qT"),
11346 else if (init
&& !processing_template_decl
)
11347 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11350 DECL_CHAIN (decl
) = decls
;
11352 result
= tree_cons (init
, type
, result
);
11354 decls
= nreverse (decls
);
11355 result
= nreverse (result
);
11357 result
= chainon (result
, void_list_node
);
11364 /* D is a constructor or overloaded `operator='.
11366 Let T be the class in which D is declared. Then, this function
11369 -1 if D's is an ill-formed constructor or copy assignment operator
11370 whose first parameter is of type `T'.
11371 0 if D is not a copy constructor or copy assignment
11373 1 if D is a copy constructor or copy assignment operator whose
11374 first parameter is a reference to non-const qualified T.
11375 2 if D is a copy constructor or copy assignment operator whose
11376 first parameter is a reference to const qualified T.
11378 This function can be used as a predicate. Positive values indicate
11379 a copy constructor and nonzero values indicate a copy assignment
11383 copy_fn_p (const_tree d
)
11389 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11391 if (TREE_CODE (d
) == TEMPLATE_DECL
11392 || (DECL_TEMPLATE_INFO (d
)
11393 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11394 /* Instantiations of template member functions are never copy
11395 functions. Note that member functions of templated classes are
11396 represented as template functions internally, and we must
11397 accept those as copy functions. */
11400 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11404 arg_type
= TREE_VALUE (args
);
11405 if (arg_type
== error_mark_node
)
11408 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11410 /* Pass by value copy assignment operator. */
11413 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11414 && !TYPE_REF_IS_RVALUE (arg_type
)
11415 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11417 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11423 args
= TREE_CHAIN (args
);
11425 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11426 /* There are more non-optional args. */
11432 /* D is a constructor or overloaded `operator='.
11434 Let T be the class in which D is declared. Then, this function
11435 returns true when D is a move constructor or move assignment
11436 operator, false otherwise. */
11439 move_fn_p (const_tree d
)
11441 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11443 if (cxx_dialect
== cxx98
)
11444 /* There are no move constructors if we are in C++98 mode. */
11447 if (TREE_CODE (d
) == TEMPLATE_DECL
11448 || (DECL_TEMPLATE_INFO (d
)
11449 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11450 /* Instantiations of template member functions are never move
11451 functions. Note that member functions of templated classes are
11452 represented as template functions internally, and we must
11453 accept those as move functions. */
11456 return move_signature_fn_p (d
);
11459 /* D is a constructor or overloaded `operator='.
11461 Then, this function returns true when D has the same signature as a move
11462 constructor or move assignment operator (because either it is such a
11463 ctor/op= or it is a template specialization with the same signature),
11464 false otherwise. */
11467 move_signature_fn_p (const_tree d
)
11471 bool result
= false;
11473 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11477 arg_type
= TREE_VALUE (args
);
11478 if (arg_type
== error_mark_node
)
11481 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11482 && TYPE_REF_IS_RVALUE (arg_type
)
11483 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11487 args
= TREE_CHAIN (args
);
11489 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11490 /* There are more non-optional args. */
11496 /* Remember any special properties of member function DECL. */
11499 grok_special_member_properties (tree decl
)
11503 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11506 class_type
= DECL_CONTEXT (decl
);
11507 if (DECL_CONSTRUCTOR_P (decl
))
11509 int ctor
= copy_fn_p (decl
);
11511 if (!DECL_ARTIFICIAL (decl
))
11512 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11518 A non-template constructor for class X is a copy
11519 constructor if its first parameter is of type X&, const
11520 X&, volatile X& or const volatile X&, and either there
11521 are no other parameters or else all other parameters have
11522 default arguments. */
11523 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11524 if (user_provided_p (decl
))
11525 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11527 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11529 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11530 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11531 else if (move_fn_p (decl
) && user_provided_p (decl
))
11532 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11533 else if (is_list_ctor (decl
))
11534 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11536 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11537 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11538 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11540 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11544 A non-template assignment operator for class X is a copy
11545 assignment operator if its parameter is of type X, X&, const
11546 X&, volatile X& or const volatile X&. */
11548 int assop
= copy_fn_p (decl
);
11552 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11553 if (user_provided_p (decl
))
11554 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11556 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11558 else if (move_fn_p (decl
) && user_provided_p (decl
))
11559 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11561 /* Destructors are handled in check_methods. */
11564 /* Check a constructor DECL has the correct form. Complains
11565 if the class has a constructor of the form X(X). */
11568 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11570 int ctor_parm
= copy_fn_p (decl
);
11576 A declaration of a constructor for a class X is ill-formed if
11577 its first parameter is of type (optionally cv-qualified) X
11578 and either there are no other parameters or else all other
11579 parameters have default arguments.
11581 We *don't* complain about member template instantiations that
11582 have this form, though; they can occur as we try to decide
11583 what constructor to use during overload resolution. Since
11584 overload resolution will never prefer such a constructor to
11585 the non-template copy constructor (which is either explicitly
11586 or implicitly defined), there's no need to worry about their
11587 existence. Theoretically, they should never even be
11588 instantiated, but that's hard to forestall. */
11589 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11597 /* An operator with this code is unary, but can also be binary. */
11600 ambi_op_p (enum tree_code code
)
11602 return (code
== INDIRECT_REF
11603 || code
== ADDR_EXPR
11604 || code
== UNARY_PLUS_EXPR
11605 || code
== NEGATE_EXPR
11606 || code
== PREINCREMENT_EXPR
11607 || code
== PREDECREMENT_EXPR
);
11610 /* An operator with this name can only be unary. */
11613 unary_op_p (enum tree_code code
)
11615 return (code
== TRUTH_NOT_EXPR
11616 || code
== BIT_NOT_EXPR
11617 || code
== COMPONENT_REF
11618 || code
== TYPE_EXPR
);
11621 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11622 errors are issued for invalid declarations. */
11625 grok_op_properties (tree decl
, bool complain
)
11627 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11629 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11630 tree name
= DECL_NAME (decl
);
11631 enum tree_code operator_code
;
11636 /* Count the number of arguments and check for ellipsis. */
11637 for (argtype
= argtypes
, arity
= 0;
11638 argtype
&& argtype
!= void_list_node
;
11639 argtype
= TREE_CHAIN (argtype
))
11641 ellipsis_p
= !argtype
;
11643 class_type
= DECL_CONTEXT (decl
);
11644 if (class_type
&& !CLASS_TYPE_P (class_type
))
11645 class_type
= NULL_TREE
;
11647 if (DECL_CONV_FN_P (decl
))
11648 operator_code
= TYPE_EXPR
;
11652 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11653 if (ansi_opname (CODE) == name) \
11655 operator_code = (CODE); \
11658 else if (ansi_assopname (CODE) == name) \
11660 operator_code = (CODE); \
11661 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11665 #include "operators.def"
11666 #undef DEF_OPERATOR
11668 gcc_unreachable ();
11671 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11672 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11675 switch (operator_code
)
11678 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11682 TYPE_GETS_DELETE (class_type
) |= 1;
11686 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11689 case VEC_DELETE_EXPR
:
11690 TYPE_GETS_DELETE (class_type
) |= 2;
11697 /* [basic.std.dynamic.allocation]/1:
11699 A program is ill-formed if an allocation function is declared
11700 in a namespace scope other than global scope or declared static
11703 The same also holds true for deallocation functions. */
11704 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11705 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11707 if (DECL_NAMESPACE_SCOPE_P (decl
))
11709 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11711 error ("%qD may not be declared within a namespace", decl
);
11714 else if (!TREE_PUBLIC (decl
))
11716 error ("%qD may not be declared as static", decl
);
11722 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11724 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11725 DECL_IS_OPERATOR_NEW (decl
) = 1;
11727 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11728 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11731 /* An operator function must either be a non-static member function
11732 or have at least one parameter of a class, a reference to a class,
11733 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11734 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11736 if (operator_code
== TYPE_EXPR
11737 || operator_code
== CALL_EXPR
11738 || operator_code
== COMPONENT_REF
11739 || operator_code
== ARRAY_REF
11740 || operator_code
== NOP_EXPR
)
11742 error ("%qD must be a nonstatic member function", decl
);
11749 if (DECL_STATIC_FUNCTION_P (decl
))
11751 error ("%qD must be either a non-static member "
11752 "function or a non-member function", decl
);
11756 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11758 tree arg
= non_reference (TREE_VALUE (p
));
11759 if (arg
== error_mark_node
)
11762 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11763 because these checks are performed even on
11764 template functions. */
11765 if (MAYBE_CLASS_TYPE_P (arg
)
11766 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11770 if (!p
|| p
== void_list_node
)
11773 error ("%qD must have an argument of class or "
11774 "enumerated type", decl
);
11780 /* There are no restrictions on the arguments to an overloaded
11782 if (operator_code
== CALL_EXPR
)
11785 /* Warn about conversion operators that will never be used. */
11786 if (IDENTIFIER_TYPENAME_P (name
)
11787 && ! DECL_TEMPLATE_INFO (decl
)
11789 /* Warn only declaring the function; there is no need to
11790 warn again about out-of-class definitions. */
11791 && class_type
== current_class_type
)
11793 tree t
= TREE_TYPE (name
);
11794 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11797 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11799 if (VOID_TYPE_P (t
))
11800 warning (OPT_Wconversion
,
11802 ? G_("conversion to a reference to void "
11803 "will never use a type conversion operator")
11804 : G_("conversion to void "
11805 "will never use a type conversion operator"));
11806 else if (class_type
)
11808 if (t
== class_type
)
11809 warning (OPT_Wconversion
,
11811 ? G_("conversion to a reference to the same type "
11812 "will never use a type conversion operator")
11813 : G_("conversion to the same type "
11814 "will never use a type conversion operator"));
11815 /* Don't force t to be complete here. */
11816 else if (MAYBE_CLASS_TYPE_P (t
)
11817 && COMPLETE_TYPE_P (t
)
11818 && DERIVED_FROM_P (t
, class_type
))
11819 warning (OPT_Wconversion
,
11821 ? G_("conversion to a reference to a base class "
11822 "will never use a type conversion operator")
11823 : G_("conversion to a base class "
11824 "will never use a type conversion operator"));
11829 if (operator_code
== COND_EXPR
)
11832 error ("ISO C++ prohibits overloading operator ?:");
11835 else if (ellipsis_p
)
11837 error ("%qD must not have variable number of arguments", decl
);
11840 else if (ambi_op_p (operator_code
))
11843 /* We pick the one-argument operator codes by default, so
11844 we don't have to change anything. */
11846 else if (arity
== 2)
11848 /* If we thought this was a unary operator, we now know
11849 it to be a binary operator. */
11850 switch (operator_code
)
11853 operator_code
= MULT_EXPR
;
11857 operator_code
= BIT_AND_EXPR
;
11860 case UNARY_PLUS_EXPR
:
11861 operator_code
= PLUS_EXPR
;
11865 operator_code
= MINUS_EXPR
;
11868 case PREINCREMENT_EXPR
:
11869 operator_code
= POSTINCREMENT_EXPR
;
11872 case PREDECREMENT_EXPR
:
11873 operator_code
= POSTDECREMENT_EXPR
;
11877 gcc_unreachable ();
11880 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11882 if ((operator_code
== POSTINCREMENT_EXPR
11883 || operator_code
== POSTDECREMENT_EXPR
)
11884 && ! processing_template_decl
11885 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11888 error ("postfix %qD must take %<int%> as its argument",
11891 error ("postfix %qD must take %<int%> as its second "
11899 error ("%qD must take either zero or one argument", decl
);
11901 error ("%qD must take either one or two arguments", decl
);
11905 /* More Effective C++ rule 6. */
11907 && (operator_code
== POSTINCREMENT_EXPR
11908 || operator_code
== POSTDECREMENT_EXPR
11909 || operator_code
== PREINCREMENT_EXPR
11910 || operator_code
== PREDECREMENT_EXPR
))
11912 tree arg
= TREE_VALUE (argtypes
);
11913 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11914 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11915 arg
= TREE_TYPE (arg
);
11916 arg
= TYPE_MAIN_VARIANT (arg
);
11917 if (operator_code
== PREINCREMENT_EXPR
11918 || operator_code
== PREDECREMENT_EXPR
)
11920 if (TREE_CODE (ret
) != REFERENCE_TYPE
11921 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11923 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11924 build_reference_type (arg
));
11928 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11929 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11933 else if (unary_op_p (operator_code
))
11938 error ("%qD must take %<void%>", decl
);
11940 error ("%qD must take exactly one argument", decl
);
11944 else /* if (binary_op_p (operator_code)) */
11949 error ("%qD must take exactly one argument", decl
);
11951 error ("%qD must take exactly two arguments", decl
);
11955 /* More Effective C++ rule 7. */
11957 && (operator_code
== TRUTH_ANDIF_EXPR
11958 || operator_code
== TRUTH_ORIF_EXPR
11959 || operator_code
== COMPOUND_EXPR
))
11960 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11964 /* Effective C++ rule 23. */
11967 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11968 && (operator_code
== PLUS_EXPR
11969 || operator_code
== MINUS_EXPR
11970 || operator_code
== TRUNC_DIV_EXPR
11971 || operator_code
== MULT_EXPR
11972 || operator_code
== TRUNC_MOD_EXPR
)
11973 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11974 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11976 /* [over.oper]/8 */
11977 for (; argtypes
&& argtypes
!= void_list_node
;
11978 argtypes
= TREE_CHAIN (argtypes
))
11979 if (TREE_PURPOSE (argtypes
))
11981 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11982 if (operator_code
== POSTINCREMENT_EXPR
11983 || operator_code
== POSTDECREMENT_EXPR
)
11985 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11990 error ("%qD cannot have default arguments", decl
);
11998 /* Return a string giving the keyword associate with CODE. */
12000 static const char *
12001 tag_name (enum tag_types code
)
12013 case typename_type
:
12016 gcc_unreachable ();
12020 /* Name lookup in an elaborated-type-specifier (after the keyword
12021 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12022 elaborated-type-specifier is invalid, issue a diagnostic and return
12023 error_mark_node; otherwise, return the *_TYPE to which it referred.
12024 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12027 check_elaborated_type_specifier (enum tag_types tag_code
,
12029 bool allow_template_p
)
12035 struct S { struct S *p; };
12037 name lookup will find the TYPE_DECL for the implicit "S::S"
12038 typedef. Adjust for that here. */
12039 if (DECL_SELF_REFERENCE_P (decl
))
12040 decl
= TYPE_NAME (TREE_TYPE (decl
));
12042 type
= TREE_TYPE (decl
);
12044 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12045 is false for this case as well. */
12046 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12048 error ("using template type parameter %qT after %qs",
12049 type
, tag_name (tag_code
));
12050 return error_mark_node
;
12052 /* Accept template template parameters. */
12053 else if (allow_template_p
12054 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12055 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12059 If the identifier resolves to a typedef-name or the
12060 simple-template-id resolves to an alias template
12061 specialization, the elaborated-type-specifier is ill-formed.
12063 In other words, the only legitimate declaration to use in the
12064 elaborated type specifier is the implicit typedef created when
12065 the type is declared. */
12066 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12067 && !DECL_SELF_REFERENCE_P (decl
)
12068 && tag_code
!= typename_type
)
12070 if (alias_template_specialization_p (type
))
12071 error ("using alias template specialization %qT after %qs",
12072 type
, tag_name (tag_code
));
12074 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12075 inform (DECL_SOURCE_LOCATION (decl
),
12076 "%qD has a previous declaration here", decl
);
12077 return error_mark_node
;
12079 else if (TREE_CODE (type
) != RECORD_TYPE
12080 && TREE_CODE (type
) != UNION_TYPE
12081 && tag_code
!= enum_type
12082 && tag_code
!= typename_type
)
12084 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12085 inform (input_location
, "%q+T has a previous declaration here", type
);
12086 return error_mark_node
;
12088 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12089 && tag_code
== enum_type
)
12091 error ("%qT referred to as enum", type
);
12092 inform (input_location
, "%q+T has a previous declaration here", type
);
12093 return error_mark_node
;
12095 else if (!allow_template_p
12096 && TREE_CODE (type
) == RECORD_TYPE
12097 && CLASSTYPE_IS_TEMPLATE (type
))
12099 /* If a class template appears as elaborated type specifier
12100 without a template header such as:
12102 template <class T> class C {};
12103 void f(class C); // No template header here
12105 then the required template argument is missing. */
12106 error ("template argument required for %<%s %T%>",
12107 tag_name (tag_code
),
12108 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12109 return error_mark_node
;
12115 /* Lookup NAME in elaborate type specifier in scope according to
12116 SCOPE and issue diagnostics if necessary.
12117 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12118 found, and ERROR_MARK_NODE for type error. */
12121 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12122 tag_scope scope
, bool template_header_p
)
12126 if (scope
== ts_global
)
12128 /* First try ordinary name lookup, ignoring hidden class name
12129 injected via friend declaration. */
12130 decl
= lookup_name_prefer_type (name
, 2);
12131 /* If that fails, the name will be placed in the smallest
12132 non-class, non-function-prototype scope according to 3.3.1/5.
12133 We may already have a hidden name declared as friend in this
12134 scope. So lookup again but not ignoring hidden names.
12135 If we find one, that name will be made visible rather than
12136 creating a new tag. */
12138 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12141 decl
= lookup_type_scope (name
, scope
);
12144 && (DECL_CLASS_TEMPLATE_P (decl
)
12145 /* If scope is ts_current we're defining a class, so ignore a
12146 template template parameter. */
12147 || (scope
!= ts_current
12148 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12149 decl
= DECL_TEMPLATE_RESULT (decl
);
12151 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12153 /* Look for invalid nested type:
12157 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12159 error ("%qD has the same name as the class in which it is "
12162 return error_mark_node
;
12165 /* Two cases we need to consider when deciding if a class
12166 template is allowed as an elaborated type specifier:
12167 1. It is a self reference to its own class.
12168 2. It comes with a template header.
12172 template <class T> class C {
12173 class C *c1; // DECL_SELF_REFERENCE_P is true
12176 template <class U> class C; // template_header_p is true
12177 template <class T> class C<T>::D {
12178 class C *c2; // DECL_SELF_REFERENCE_P is true
12181 t
= check_elaborated_type_specifier (tag_code
,
12184 | DECL_SELF_REFERENCE_P (decl
));
12187 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12189 error ("reference to %qD is ambiguous", name
);
12190 print_candidates (decl
);
12191 return error_mark_node
;
12197 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12198 Define the tag as a forward-reference if it is not defined.
12200 If a declaration is given, process it here, and report an error if
12201 multiple declarations are not identical.
12203 SCOPE is TS_CURRENT when this is also a definition. Only look in
12204 the current frame for the name (since C++ allows new names in any
12205 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12206 declaration. Only look beginning from the current scope outward up
12207 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12209 TEMPLATE_HEADER_P is true when this declaration is preceded by
12210 a set of template parameters. */
12213 xref_tag_1 (enum tag_types tag_code
, tree name
,
12214 tag_scope orig_scope
, bool template_header_p
)
12216 enum tree_code code
;
12218 tree context
= NULL_TREE
;
12221 gcc_assert (identifier_p (name
));
12227 code
= RECORD_TYPE
;
12233 code
= ENUMERAL_TYPE
;
12236 gcc_unreachable ();
12239 if (orig_scope
== ts_lambda
)
12240 scope
= ts_current
;
12242 scope
= orig_scope
;
12244 /* In case of anonymous name, xref_tag is only called to
12245 make type node and push name. Name lookup is not required. */
12246 if (ANON_AGGRNAME_P (name
))
12249 t
= lookup_and_check_tag (tag_code
, name
,
12250 scope
, template_header_p
);
12252 if (t
== error_mark_node
)
12253 return error_mark_node
;
12255 if (scope
!= ts_current
&& t
&& current_class_type
12256 && template_class_depth (current_class_type
)
12257 && template_header_p
)
12259 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12262 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12263 definition of this tag. Since, in addition, we are currently
12264 processing a (member) template declaration of a template
12265 class, we must be very careful; consider:
12272 { template <class V>
12273 friend struct S1; };
12275 Here, the S2::S1 declaration should not be confused with the
12276 outer declaration. In particular, the inner version should
12277 have a template parameter of level 2, not level 1. This
12278 would be particularly important if the member declaration
12281 template <class V = U> friend struct S1;
12283 say, when we should tsubst into `U' when instantiating
12284 S2. On the other hand, when presented with:
12294 we must find the inner binding eventually. We
12295 accomplish this by making sure that the new type we
12296 create to represent this declaration has the right
12298 context
= TYPE_CONTEXT (t
);
12304 /* If no such tag is yet defined, create a forward-reference node
12305 and record it as the "definition".
12306 When a real declaration of this type is found,
12307 the forward-reference will be altered into a real type. */
12308 if (code
== ENUMERAL_TYPE
)
12310 error ("use of enum %q#D without previous declaration", name
);
12311 return error_mark_node
;
12315 t
= make_class_type (code
);
12316 TYPE_CONTEXT (t
) = context
;
12317 if (orig_scope
== ts_lambda
)
12318 /* Remember that we're declaring a lambda to avoid bogus errors
12319 in push_template_decl. */
12320 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12321 t
= pushtag (name
, t
, scope
);
12326 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12328 if (!redeclare_class_template (t
, current_template_parms
))
12329 return error_mark_node
;
12331 else if (!processing_template_decl
12332 && CLASS_TYPE_P (t
)
12333 && CLASSTYPE_IS_TEMPLATE (t
))
12335 error ("redeclaration of %qT as a non-template", t
);
12336 error ("previous declaration %q+D", t
);
12337 return error_mark_node
;
12340 /* Make injected friend class visible. */
12341 if (scope
!= ts_within_enclosing_non_class
12342 && hidden_name_p (TYPE_NAME (t
)))
12344 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12345 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12347 if (TYPE_TEMPLATE_INFO (t
))
12349 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12350 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12358 /* Wrapper for xref_tag_1. */
12361 xref_tag (enum tag_types tag_code
, tree name
,
12362 tag_scope scope
, bool template_header_p
)
12366 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12367 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12368 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12374 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12376 enum tag_types tag_kind
;
12378 if (TREE_CODE (old
) == RECORD_TYPE
)
12379 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12381 tag_kind
= union_type
;
12383 if (id
== NULL_TREE
)
12384 id
= TYPE_IDENTIFIER (old
);
12386 return xref_tag (tag_kind
, id
, scope
, false);
12389 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12390 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12391 access_* node, and the TREE_VALUE is the type of the base-class.
12392 Non-NULL TREE_TYPE indicates virtual inheritance.
12394 Returns true if the binfo hierarchy was successfully created,
12395 false if an error was detected. */
12398 xref_basetypes (tree ref
, tree base_list
)
12401 tree binfo
, base_binfo
;
12402 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12403 unsigned max_bases
= 0; /* Maximum direct bases. */
12405 tree default_access
;
12406 tree igo_prev
; /* Track Inheritance Graph Order. */
12408 if (ref
== error_mark_node
)
12411 /* The base of a derived class is private by default, all others are
12413 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12414 && CLASSTYPE_DECLARED_CLASS (ref
)
12415 ? access_private_node
: access_public_node
);
12417 /* First, make sure that any templates in base-classes are
12418 instantiated. This ensures that if we call ourselves recursively
12419 we do not get confused about which classes are marked and which
12421 basep
= &base_list
;
12424 tree basetype
= TREE_VALUE (*basep
);
12426 /* The dependent_type_p call below should really be dependent_scope_p
12427 so that we give a hard error about using an incomplete type as a
12428 base, but we allow it with a pedwarn for backward
12430 if (processing_template_decl
12431 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12432 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12433 if (!dependent_type_p (basetype
)
12434 && !complete_type_or_else (basetype
, NULL
))
12435 /* An incomplete type. Remove it from the list. */
12436 *basep
= TREE_CHAIN (*basep
);
12440 if (TREE_TYPE (*basep
))
12442 if (CLASS_TYPE_P (basetype
))
12443 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12444 basep
= &TREE_CHAIN (*basep
);
12448 TYPE_MARKED_P (ref
) = 1;
12450 /* The binfo slot should be empty, unless this is an (ill-formed)
12452 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12454 error ("redefinition of %q#T", ref
);
12458 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12460 binfo
= make_tree_binfo (max_bases
);
12462 TYPE_BINFO (ref
) = binfo
;
12463 BINFO_OFFSET (binfo
) = size_zero_node
;
12464 BINFO_TYPE (binfo
) = ref
;
12466 /* Apply base-class info set up to the variants of this type. */
12467 fixup_type_variants (ref
);
12471 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12472 /* An aggregate cannot have baseclasses. */
12473 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12475 if (TREE_CODE (ref
) == UNION_TYPE
)
12477 error ("derived union %qT invalid", ref
);
12484 if (TYPE_FOR_JAVA (ref
))
12486 error ("Java class %qT cannot have multiple bases", ref
);
12493 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12495 if (TYPE_FOR_JAVA (ref
))
12497 error ("Java class %qT cannot have virtual bases", ref
);
12502 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12504 tree access
= TREE_PURPOSE (base_list
);
12505 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12506 tree basetype
= TREE_VALUE (base_list
);
12508 if (access
== access_default_node
)
12509 access
= default_access
;
12511 if (PACK_EXPANSION_P (basetype
))
12512 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12513 if (TREE_CODE (basetype
) == TYPE_DECL
)
12514 basetype
= TREE_TYPE (basetype
);
12515 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12517 error ("base type %qT fails to be a struct or class type",
12522 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12523 TYPE_FOR_JAVA (ref
) = 1;
12525 base_binfo
= NULL_TREE
;
12526 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12528 base_binfo
= TYPE_BINFO (basetype
);
12529 /* The original basetype could have been a typedef'd type. */
12530 basetype
= BINFO_TYPE (base_binfo
);
12532 /* Inherit flags from the base. */
12533 TYPE_HAS_NEW_OPERATOR (ref
)
12534 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12535 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12536 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12537 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12538 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12539 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12540 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12541 CLASSTYPE_REPEATED_BASE_P (ref
)
12542 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12545 /* We must do this test after we've seen through a typedef
12547 if (TYPE_MARKED_P (basetype
))
12549 if (basetype
== ref
)
12550 error ("recursive type %qT undefined", basetype
);
12552 error ("duplicate base type %qT invalid", basetype
);
12556 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12557 /* Regenerate the pack expansion for the bases. */
12558 basetype
= make_pack_expansion (basetype
);
12560 TYPE_MARKED_P (basetype
) = 1;
12562 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12563 &igo_prev
, via_virtual
);
12564 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12565 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12567 BINFO_BASE_APPEND (binfo
, base_binfo
);
12568 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12571 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12572 /* If we didn't get max_vbases vbases, we must have shared at
12573 least one of them, and are therefore diamond shaped. */
12574 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12576 /* Unmark all the types. */
12577 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12578 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12579 TYPE_MARKED_P (ref
) = 0;
12581 /* Now see if we have a repeated base type. */
12582 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12584 for (base_binfo
= binfo
; base_binfo
;
12585 base_binfo
= TREE_CHAIN (base_binfo
))
12587 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12589 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12592 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12594 for (base_binfo
= binfo
; base_binfo
;
12595 base_binfo
= TREE_CHAIN (base_binfo
))
12596 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12597 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12606 /* Copies the enum-related properties from type SRC to type DST.
12607 Used with the underlying type of an enum and the enum itself. */
12609 copy_type_enum (tree dst
, tree src
)
12612 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12614 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12615 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12616 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12617 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12618 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12619 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12620 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12621 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12622 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12626 /* Begin compiling the definition of an enumeration type.
12629 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12631 UNDERLYING_TYPE is the type that will be used as the storage for
12632 the enumeration type. This should be NULL_TREE if no storage type
12635 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12637 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12639 Returns the type object, as yet incomplete.
12640 Also records info about it so that build_enumerator
12641 may be used to declare the individual values as they are read. */
12644 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12645 bool scoped_enum_p
, bool *is_new
)
12647 tree prevtype
= NULL_TREE
;
12648 gcc_assert (identifier_p (name
));
12652 /* [C++0x dcl.enum]p5:
12654 If not explicitly specified, the underlying type of a scoped
12655 enumeration type is int. */
12656 if (!underlying_type
&& scoped_enum_p
)
12657 underlying_type
= integer_type_node
;
12659 if (underlying_type
)
12660 underlying_type
= cv_unqualified (underlying_type
);
12662 /* If this is the real definition for a previous forward reference,
12663 fill in the contents in the same object that used to be the
12664 forward reference. */
12666 enumtype
= lookup_and_check_tag (enum_type
, name
,
12667 /*tag_scope=*/ts_current
,
12668 /*template_header_p=*/false);
12670 /* In case of a template_decl, the only check that should be deferred
12671 to instantiation time is the comparison of underlying types. */
12672 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12674 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12676 error_at (input_location
, "scoped/unscoped mismatch "
12677 "in enum %q#T", enumtype
);
12678 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12679 "previous definition here");
12680 enumtype
= error_mark_node
;
12682 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12684 error_at (input_location
, "underlying type mismatch "
12685 "in enum %q#T", enumtype
);
12686 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12687 "previous definition here");
12688 enumtype
= error_mark_node
;
12690 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12691 && !dependent_type_p (underlying_type
)
12692 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12693 && !same_type_p (underlying_type
,
12694 ENUM_UNDERLYING_TYPE (enumtype
)))
12696 error_at (input_location
, "different underlying type "
12697 "in enum %q#T", enumtype
);
12698 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12699 "previous definition here");
12700 underlying_type
= NULL_TREE
;
12704 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12705 || processing_template_decl
)
12707 /* In case of error, make a dummy enum to allow parsing to
12709 if (enumtype
== error_mark_node
)
12711 name
= make_anon_name ();
12712 enumtype
= NULL_TREE
;
12715 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12716 of an opaque enum, or an opaque enum of an already defined
12717 enumeration (C++0x only).
12718 In any other case, it'll be NULL_TREE. */
12724 prevtype
= enumtype
;
12726 /* Do not push the decl more than once, unless we need to
12727 compare underlying types at instantiation time */
12729 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12730 || (underlying_type
12731 && dependent_type_p (underlying_type
))
12732 || (ENUM_UNDERLYING_TYPE (enumtype
)
12733 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12735 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12736 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12739 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12742 if (enumtype
== error_mark_node
)
12743 return error_mark_node
;
12745 /* The enum is considered opaque until the opening '{' of the
12746 enumerator list. */
12747 SET_OPAQUE_ENUM_P (enumtype
, true);
12748 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12751 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12753 if (underlying_type
)
12755 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12757 copy_type_enum (enumtype
, underlying_type
);
12758 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12760 else if (dependent_type_p (underlying_type
))
12761 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12763 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12764 underlying_type
, enumtype
);
12767 /* If into a template class, the returned enum is always the first
12768 declaration (opaque or not) seen. This way all the references to
12769 this type will be to the same declaration. The following ones are used
12770 only to check for definition errors. */
12771 if (prevtype
&& processing_template_decl
)
12777 /* After processing and defining all the values of an enumeration type,
12778 install their decls in the enumeration type.
12779 ENUMTYPE is the type object. */
12782 finish_enum_value_list (tree enumtype
)
12785 tree underlying_type
;
12788 tree minnode
, maxnode
;
12791 bool fixed_underlying_type_p
12792 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12794 /* We built up the VALUES in reverse order. */
12795 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12797 /* For an enum defined in a template, just set the type of the values;
12798 all further processing is postponed until the template is
12799 instantiated. We need to set the type so that tsubst of a CONST_DECL
12801 if (processing_template_decl
)
12803 for (values
= TYPE_VALUES (enumtype
);
12805 values
= TREE_CHAIN (values
))
12806 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12810 /* Determine the minimum and maximum values of the enumerators. */
12811 if (TYPE_VALUES (enumtype
))
12813 minnode
= maxnode
= NULL_TREE
;
12815 for (values
= TYPE_VALUES (enumtype
);
12817 values
= TREE_CHAIN (values
))
12819 decl
= TREE_VALUE (values
);
12821 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12822 each enumerator has the type of its enumeration. Prior to the
12823 closing brace, the type of each enumerator is the type of its
12824 initializing value. */
12825 TREE_TYPE (decl
) = enumtype
;
12827 /* Update the minimum and maximum values, if appropriate. */
12828 value
= DECL_INITIAL (decl
);
12829 if (value
== error_mark_node
)
12830 value
= integer_zero_node
;
12831 /* Figure out what the minimum and maximum values of the
12832 enumerators are. */
12834 minnode
= maxnode
= value
;
12835 else if (tree_int_cst_lt (maxnode
, value
))
12837 else if (tree_int_cst_lt (value
, minnode
))
12844 If the enumerator-list is empty, the underlying type is as if
12845 the enumeration had a single enumerator with value 0. */
12846 minnode
= maxnode
= integer_zero_node
;
12848 if (!fixed_underlying_type_p
)
12850 /* Compute the number of bits require to represent all values of the
12851 enumeration. We must do this before the type of MINNODE and
12852 MAXNODE are transformed, since tree_int_cst_min_precision relies
12853 on the TREE_TYPE of the value it is passed. */
12854 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12855 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12856 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12857 int precision
= MAX (lowprec
, highprec
);
12859 bool use_short_enum
;
12861 /* Determine the underlying type of the enumeration.
12865 The underlying type of an enumeration is an integral type that
12866 can represent all the enumerator values defined in the
12867 enumeration. It is implementation-defined which integral type is
12868 used as the underlying type for an enumeration except that the
12869 underlying type shall not be larger than int unless the value of
12870 an enumerator cannot fit in an int or unsigned int.
12872 We use "int" or an "unsigned int" as the underlying type, even if
12873 a smaller integral type would work, unless the user has
12874 explicitly requested that we use the smallest possible type. The
12875 user can request that for all enumerations with a command line
12876 flag, or for just one enumeration with an attribute. */
12878 use_short_enum
= flag_short_enums
12879 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12881 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12885 underlying_type
= integer_types
[itk
];
12886 if (underlying_type
!= NULL_TREE
12887 && TYPE_PRECISION (underlying_type
) >= precision
12888 && TYPE_SIGN (underlying_type
) == sgn
)
12891 if (itk
== itk_none
)
12895 IF no integral type can represent all the enumerator values, the
12896 enumeration is ill-formed. */
12897 error ("no integral type can represent all of the enumerator values "
12898 "for %qT", enumtype
);
12899 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12900 underlying_type
= integer_types
[itk_unsigned_long_long
];
12905 The value of sizeof() applied to an enumeration type, an object
12906 of an enumeration type, or an enumerator, is the value of sizeof()
12907 applied to the underlying type. */
12908 copy_type_enum (enumtype
, underlying_type
);
12910 /* Compute the minimum and maximum values for the type.
12914 For an enumeration where emin is the smallest enumerator and emax
12915 is the largest, the values of the enumeration are the values of the
12916 underlying type in the range bmin to bmax, where bmin and bmax are,
12917 respectively, the smallest and largest values of the smallest bit-
12918 field that can store emin and emax. */
12920 /* The middle-end currently assumes that types with TYPE_PRECISION
12921 narrower than their underlying type are suitably zero or sign
12922 extended to fill their mode. Similarly, it assumes that the front
12923 end assures that a value of a particular type must be within
12924 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12926 We used to set these fields based on bmin and bmax, but that led
12927 to invalid assumptions like optimizing away bounds checking. So
12928 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12929 TYPE_MAX_VALUE to the values for the mode above and only restrict
12930 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12931 ENUM_UNDERLYING_TYPE (enumtype
)
12932 = build_distinct_type_copy (underlying_type
);
12933 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12934 set_min_and_max_values_for_integral_type
12935 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12937 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12938 if (flag_strict_enums
)
12939 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12942 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12944 /* Convert each of the enumerators to the type of the underlying
12945 type of the enumeration. */
12946 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12948 location_t saved_location
;
12950 decl
= TREE_VALUE (values
);
12951 saved_location
= input_location
;
12952 input_location
= DECL_SOURCE_LOCATION (decl
);
12953 if (fixed_underlying_type_p
)
12954 /* If the enumeration type has a fixed underlying type, we
12955 already checked all of the enumerator values. */
12956 value
= DECL_INITIAL (decl
);
12958 value
= perform_implicit_conversion (underlying_type
,
12959 DECL_INITIAL (decl
),
12960 tf_warning_or_error
);
12961 input_location
= saved_location
;
12963 /* Do not clobber shared ints. */
12964 value
= copy_node (value
);
12966 TREE_TYPE (value
) = enumtype
;
12967 DECL_INITIAL (decl
) = value
;
12970 /* Fix up all variant types of this enum type. */
12971 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12972 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12974 if (at_class_scope_p ()
12975 && COMPLETE_TYPE_P (current_class_type
)
12976 && UNSCOPED_ENUM_P (enumtype
))
12977 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12978 current_class_type
);
12980 /* Finish debugging output for this type. */
12981 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12984 /* Finishes the enum type. This is called only the first time an
12985 enumeration is seen, be it opaque or odinary.
12986 ENUMTYPE is the type object. */
12989 finish_enum (tree enumtype
)
12991 if (processing_template_decl
)
12993 if (at_function_scope_p ())
12994 add_stmt (build_min (TAG_DEFN
, enumtype
));
12998 /* If this is a forward declaration, there should not be any variants,
12999 though we can get a variant in the middle of an enum-specifier with
13000 wacky code like 'enum E { e = sizeof(const E*) };' */
13001 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13002 && (TYPE_VALUES (enumtype
)
13003 || !TYPE_NEXT_VARIANT (enumtype
)));
13006 /* Build and install a CONST_DECL for an enumeration constant of the
13007 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13008 LOC is the location of NAME.
13009 Assignment of sequential values by default is handled here. */
13012 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
13018 /* scalar_constant_value will pull out this expression, so make sure
13019 it's folded as appropriate. */
13020 if (processing_template_decl
)
13021 value
= fold_non_dependent_expr (value
);
13023 /* If the VALUE was erroneous, pretend it wasn't there; that will
13024 result in the enum being assigned the next value in sequence. */
13025 if (value
== error_mark_node
)
13028 /* Remove no-op casts from the value. */
13030 STRIP_TYPE_NOPS (value
);
13032 if (! processing_template_decl
)
13034 /* Validate and default VALUE. */
13035 if (value
!= NULL_TREE
)
13037 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13039 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13044 else if (! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13045 value
= perform_implicit_conversion_flags
13046 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13047 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13049 if (value
== error_mark_node
)
13052 if (value
!= NULL_TREE
)
13054 value
= cxx_constant_value (value
);
13056 if (TREE_CODE (value
) != INTEGER_CST
13057 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13059 error ("enumerator value for %qD is not an integer constant",
13066 /* Default based on previous value. */
13067 if (value
== NULL_TREE
)
13069 if (TYPE_VALUES (enumtype
))
13074 /* C++03 7.2/4: If no initializer is specified for the first
13075 enumerator, the type is an unspecified integral
13076 type. Otherwise the type is the same as the type of the
13077 initializing value of the preceding enumerator unless the
13078 incremented value is not representable in that type, in
13079 which case the type is an unspecified integral type
13080 sufficient to contain the incremented value. */
13081 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13082 if (error_operand_p (prev_value
))
13083 value
= error_mark_node
;
13086 tree type
= TREE_TYPE (prev_value
);
13087 signop sgn
= TYPE_SIGN (type
);
13088 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13092 bool pos
= !wi::neg_p (wi
, sgn
);
13093 if (!wi::fits_to_tree_p (wi
, type
))
13096 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13098 type
= integer_types
[itk
];
13099 if (type
!= NULL_TREE
13100 && (pos
|| !TYPE_UNSIGNED (type
))
13101 && wi::fits_to_tree_p (wi
, type
))
13104 if (type
&& cxx_dialect
< cxx11
13105 && itk
> itk_unsigned_long
)
13106 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13107 incremented enumerator value is too large for %<unsigned long%>" : "\
13108 incremented enumerator value is too large for %<long%>");
13110 if (type
== NULL_TREE
)
13113 value
= wide_int_to_tree (type
, wi
);
13118 error ("overflow in enumeration values at %qD", name
);
13119 value
= error_mark_node
;
13124 value
= integer_zero_node
;
13127 /* Remove no-op casts from the value. */
13128 STRIP_TYPE_NOPS (value
);
13130 /* If the underlying type of the enum is fixed, check whether
13131 the enumerator values fits in the underlying type. If it
13132 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13133 if (ENUM_UNDERLYING_TYPE (enumtype
)
13135 && TREE_CODE (value
) == INTEGER_CST
)
13137 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13138 error ("enumerator value %E is outside the range of underlying "
13139 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13141 /* Convert the value to the appropriate type. */
13142 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13146 /* C++ associates enums with global, function, or class declarations. */
13147 context
= current_scope ();
13149 /* Build the actual enumeration constant. Note that the enumeration
13150 constants have the underlying type of the enum (if it is fixed)
13151 or the type of their initializer (if the underlying type of the
13152 enum is not fixed):
13156 If the underlying type is fixed, the type of each enumerator
13157 prior to the closing brace is the underlying type; if the
13158 initializing value of an enumerator cannot be represented by
13159 the underlying type, the program is ill-formed. If the
13160 underlying type is not fixed, the type of each enumerator is
13161 the type of its initializing value.
13163 If the underlying type is not fixed, it will be computed by
13164 finish_enum and we will reset the type of this enumerator. Of
13165 course, if we're processing a template, there may be no value. */
13166 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13168 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13170 DECL_CONTEXT (decl
) = enumtype
;
13171 TREE_CONSTANT (decl
) = 1;
13172 TREE_READONLY (decl
) = 1;
13173 DECL_INITIAL (decl
) = value
;
13175 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13176 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13177 on the TYPE_FIELDS list for `S'. (That's so that you can say
13178 things like `S::i' later.) */
13179 finish_member_declaration (decl
);
13183 /* Add this enumeration constant to the list for this type. */
13184 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13187 /* Look for an enumerator with the given NAME within the enumeration
13188 type ENUMTYPE. This routine is used primarily for qualified name
13189 lookup into an enumerator in C++0x, e.g.,
13191 enum class Color { Red, Green, Blue };
13193 Color color = Color::Red;
13195 Returns the value corresponding to the enumerator, or
13196 NULL_TREE if no such enumerator was found. */
13198 lookup_enumerator (tree enumtype
, tree name
)
13201 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13203 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13204 return e
? TREE_VALUE (e
) : NULL_TREE
;
13208 /* We're defining DECL. Make sure that its type is OK. */
13211 check_function_type (tree decl
, tree current_function_parms
)
13213 tree fntype
= TREE_TYPE (decl
);
13214 tree return_type
= complete_type (TREE_TYPE (fntype
));
13216 /* In a function definition, arg types must be complete. */
13217 require_complete_types_for_parms (current_function_parms
);
13219 if (dependent_type_p (return_type
)
13220 || type_uses_auto (return_type
))
13222 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13223 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13225 tree args
= TYPE_ARG_TYPES (fntype
);
13227 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13228 error ("return type %q#T is incomplete", return_type
);
13230 error ("return type has Java class type %q#T", return_type
);
13232 /* Make it return void instead. */
13233 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13234 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13236 TREE_CHAIN (args
));
13238 fntype
= build_function_type (void_type_node
, args
);
13240 = build_exception_variant (fntype
,
13241 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13242 fntype
= (cp_build_type_attribute_variant
13243 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13244 TREE_TYPE (decl
) = fntype
;
13247 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13250 /* Create the FUNCTION_DECL for a function definition.
13251 DECLSPECS and DECLARATOR are the parts of the declaration;
13252 they describe the function's name and the type it returns,
13253 but twisted together in a fashion that parallels the syntax of C.
13255 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13256 DECLARATOR is really the DECL for the function we are about to
13257 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13258 indicating that the function is an inline defined in-class.
13260 This function creates a binding context for the function body
13261 as well as setting up the FUNCTION_DECL in current_function_decl.
13263 For C++, we must first check whether that datum makes any sense.
13264 For example, "class A local_a(1,2);" means that variable local_a
13265 is an aggregate of type A, which should have a constructor
13266 applied to it with the argument list [1, 2].
13268 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13269 or may be a BLOCK if the function has been defined previously
13270 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13271 error_mark_node if the function has never been defined, or
13272 a BLOCK if the function has been defined somewhere. */
13275 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13277 tree ctype
= NULL_TREE
;
13280 int doing_friend
= 0;
13281 cp_binding_level
*bl
;
13282 tree current_function_parms
;
13283 struct c_fileinfo
*finfo
13284 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13285 bool honor_interface
;
13287 /* Sanity check. */
13288 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13289 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13291 fntype
= TREE_TYPE (decl1
);
13292 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13293 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13295 /* ISO C++ 11.4/5. A friend function defined in a class is in
13296 the (lexical) scope of the class in which it is defined. */
13297 if (!ctype
&& DECL_FRIEND_P (decl1
))
13299 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13301 /* CTYPE could be null here if we're dealing with a template;
13302 for example, `inline friend float foo()' inside a template
13303 will have no CTYPE set. */
13304 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13310 if (DECL_DECLARED_INLINE_P (decl1
)
13311 && lookup_attribute ("noinline", attrs
))
13312 warning (0, "inline function %q+D given attribute noinline", decl1
);
13314 /* Handle gnu_inline attribute. */
13315 if (GNU_INLINE_P (decl1
))
13317 DECL_EXTERNAL (decl1
) = 1;
13318 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13319 DECL_INTERFACE_KNOWN (decl1
) = 1;
13320 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13323 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13324 /* This is a constructor, we must ensure that any default args
13325 introduced by this definition are propagated to the clones
13326 now. The clones are used directly in overload resolution. */
13327 adjust_clone_args (decl1
);
13329 /* Sometimes we don't notice that a function is a static member, and
13330 build a METHOD_TYPE for it. Fix that up now. */
13331 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13332 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13334 /* Set up current_class_type, and enter the scope of the class, if
13337 push_nested_class (ctype
);
13338 else if (DECL_STATIC_FUNCTION_P (decl1
))
13339 push_nested_class (DECL_CONTEXT (decl1
));
13341 /* Now that we have entered the scope of the class, we must restore
13342 the bindings for any template parameters surrounding DECL1, if it
13343 is an inline member template. (Order is important; consider the
13344 case where a template parameter has the same name as a field of
13345 the class.) It is not until after this point that
13346 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13347 if (flags
& SF_INCLASS_INLINE
)
13348 maybe_begin_member_template_processing (decl1
);
13350 /* Effective C++ rule 15. */
13352 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13353 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13354 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13356 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13357 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13358 if (!DECL_INITIAL (decl1
))
13359 DECL_INITIAL (decl1
) = error_mark_node
;
13361 /* This function exists in static storage.
13362 (This does not mean `static' in the C sense!) */
13363 TREE_STATIC (decl1
) = 1;
13365 /* We must call push_template_decl after current_class_type is set
13366 up. (If we are processing inline definitions after exiting a
13367 class scope, current_class_type will be NULL_TREE until set above
13368 by push_nested_class.) */
13369 if (processing_template_decl
)
13371 tree newdecl1
= push_template_decl (decl1
);
13372 if (newdecl1
== error_mark_node
)
13374 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13375 pop_nested_class ();
13381 /* We are now in the scope of the function being defined. */
13382 current_function_decl
= decl1
;
13384 /* Save the parm names or decls from this function's declarator
13385 where store_parm_decls will find them. */
13386 current_function_parms
= DECL_ARGUMENTS (decl1
);
13388 /* Make sure the parameter and return types are reasonable. When
13389 you declare a function, these types can be incomplete, but they
13390 must be complete when you define the function. */
13391 check_function_type (decl1
, current_function_parms
);
13393 /* Build the return declaration for the function. */
13394 restype
= TREE_TYPE (fntype
);
13396 if (DECL_RESULT (decl1
) == NULL_TREE
)
13400 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13401 DECL_ARTIFICIAL (resdecl
) = 1;
13402 DECL_IGNORED_P (resdecl
) = 1;
13403 DECL_RESULT (decl1
) = resdecl
;
13405 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13408 /* Let the user know we're compiling this function. */
13409 announce_function (decl1
);
13411 /* Record the decl so that the function name is defined.
13412 If we already have a decl for this name, and it is a FUNCTION_DECL,
13413 use the old decl. */
13414 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13416 /* A specialization is not used to guide overload resolution. */
13417 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13418 && !(DECL_USE_TEMPLATE (decl1
) &&
13419 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13421 tree olddecl
= pushdecl (decl1
);
13423 if (olddecl
== error_mark_node
)
13424 /* If something went wrong when registering the declaration,
13425 use DECL1; we have to have a FUNCTION_DECL to use when
13426 parsing the body of the function. */
13430 /* Otherwise, OLDDECL is either a previous declaration
13431 of the same function or DECL1 itself. */
13433 if (warn_missing_declarations
13434 && olddecl
== decl1
13435 && !DECL_MAIN_P (decl1
)
13436 && TREE_PUBLIC (decl1
)
13437 && !DECL_DECLARED_INLINE_P (decl1
))
13441 /* Check whether DECL1 is in an anonymous
13443 for (context
= DECL_CONTEXT (decl1
);
13445 context
= DECL_CONTEXT (context
))
13447 if (TREE_CODE (context
) == NAMESPACE_DECL
13448 && DECL_NAME (context
) == NULL_TREE
)
13452 if (context
== NULL
)
13453 warning (OPT_Wmissing_declarations
,
13454 "no previous declaration for %q+D", decl1
);
13462 /* We need to set the DECL_CONTEXT. */
13463 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13464 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13466 fntype
= TREE_TYPE (decl1
);
13467 restype
= TREE_TYPE (fntype
);
13469 /* If #pragma weak applies, mark the decl appropriately now.
13470 The pragma only applies to global functions. Because
13471 determining whether or not the #pragma applies involves
13472 computing the mangled name for the declaration, we cannot
13473 apply the pragma until after we have merged this declaration
13474 with any previous declarations; if the original declaration
13475 has a linkage specification, that specification applies to
13476 the definition as well, and may affect the mangled name. */
13477 if (DECL_FILE_SCOPE_P (decl1
))
13478 maybe_apply_pragma_weak (decl1
);
13481 /* Reset this in case the call to pushdecl changed it. */
13482 current_function_decl
= decl1
;
13484 gcc_assert (DECL_INITIAL (decl1
));
13486 /* This function may already have been parsed, in which case just
13487 return; our caller will skip over the body without parsing. */
13488 if (DECL_INITIAL (decl1
) != error_mark_node
)
13491 /* Initialize RTL machinery. We cannot do this until
13492 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13493 even when processing a template; this is how we get
13494 CFUN set up, and our per-function variables initialized.
13495 FIXME factor out the non-RTL stuff. */
13496 bl
= current_binding_level
;
13497 allocate_struct_function (decl1
, processing_template_decl
);
13499 /* Initialize the language data structures. Whenever we start
13500 a new function, we destroy temporaries in the usual way. */
13501 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13502 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13503 current_binding_level
= bl
;
13505 if (!processing_template_decl
&& type_uses_auto (restype
))
13507 FNDECL_USED_AUTO (decl1
) = true;
13508 current_function_auto_return_pattern
= restype
;
13511 /* Start the statement-tree, start the tree now. */
13512 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13514 /* If we are (erroneously) defining a function that we have already
13515 defined before, wipe out what we knew before. */
13516 if (!DECL_PENDING_INLINE_P (decl1
))
13517 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13519 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13521 /* We know that this was set up by `grokclassfn'. We do not
13522 wait until `store_parm_decls', since evil parse errors may
13523 never get us to that point. Here we keep the consistency
13524 between `current_class_type' and `current_class_ptr'. */
13525 tree t
= DECL_ARGUMENTS (decl1
);
13527 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13528 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13530 cp_function_chain
->x_current_class_ref
13531 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13532 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13533 cp_function_chain
->x_current_class_ptr
= t
;
13535 /* Constructors and destructors need to know whether they're "in
13536 charge" of initializing virtual base classes. */
13537 t
= DECL_CHAIN (t
);
13538 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13540 current_in_charge_parm
= t
;
13541 t
= DECL_CHAIN (t
);
13543 if (DECL_HAS_VTT_PARM_P (decl1
))
13545 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13546 current_vtt_parm
= t
;
13550 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13551 /* Implicitly-defined methods (like the
13552 destructor for a class in which no destructor
13553 is explicitly declared) must not be defined
13554 until their definition is needed. So, we
13555 ignore interface specifications for
13556 compiler-generated functions. */
13557 && !DECL_ARTIFICIAL (decl1
));
13559 if (processing_template_decl
)
13560 /* Don't mess with interface flags. */;
13561 else if (DECL_INTERFACE_KNOWN (decl1
))
13563 tree ctx
= decl_function_context (decl1
);
13565 if (DECL_NOT_REALLY_EXTERN (decl1
))
13566 DECL_EXTERNAL (decl1
) = 0;
13568 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13569 /* This is a function in a local class in an extern inline
13570 or template function. */
13571 comdat_linkage (decl1
);
13573 /* If this function belongs to an interface, it is public.
13574 If it belongs to someone else's interface, it is also external.
13575 This only affects inlines and template instantiations. */
13576 else if (!finfo
->interface_unknown
&& honor_interface
)
13578 if (DECL_DECLARED_INLINE_P (decl1
)
13579 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13581 DECL_EXTERNAL (decl1
)
13582 = (finfo
->interface_only
13583 || (DECL_DECLARED_INLINE_P (decl1
)
13584 && ! flag_implement_inlines
13585 && !DECL_VINDEX (decl1
)));
13587 /* For WIN32 we also want to put these in linkonce sections. */
13588 maybe_make_one_only (decl1
);
13591 DECL_EXTERNAL (decl1
) = 0;
13592 DECL_INTERFACE_KNOWN (decl1
) = 1;
13593 /* If this function is in an interface implemented in this file,
13594 make sure that the back end knows to emit this function
13596 if (!DECL_EXTERNAL (decl1
))
13597 mark_needed (decl1
);
13599 else if (finfo
->interface_unknown
&& finfo
->interface_only
13600 && honor_interface
)
13602 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13603 interface, we will have both finfo->interface_unknown and
13604 finfo->interface_only set. In that case, we don't want to
13605 use the normal heuristics because someone will supply a
13606 #pragma implementation elsewhere, and deducing it here would
13607 produce a conflict. */
13608 comdat_linkage (decl1
);
13609 DECL_EXTERNAL (decl1
) = 0;
13610 DECL_INTERFACE_KNOWN (decl1
) = 1;
13611 DECL_DEFER_OUTPUT (decl1
) = 1;
13615 /* This is a definition, not a reference.
13616 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13617 if (!GNU_INLINE_P (decl1
))
13618 DECL_EXTERNAL (decl1
) = 0;
13620 if ((DECL_DECLARED_INLINE_P (decl1
)
13621 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13622 && ! DECL_INTERFACE_KNOWN (decl1
))
13623 DECL_DEFER_OUTPUT (decl1
) = 1;
13625 DECL_INTERFACE_KNOWN (decl1
) = 1;
13628 /* Determine the ELF visibility attribute for the function. We must not
13629 do this before calling "pushdecl", as we must allow "duplicate_decls"
13630 to merge any attributes appropriately. We also need to wait until
13632 if (!DECL_CLONED_FUNCTION_P (decl1
))
13633 determine_visibility (decl1
);
13635 if (!processing_template_decl
)
13636 maybe_instantiate_noexcept (decl1
);
13638 begin_scope (sk_function_parms
, decl1
);
13642 if (DECL_DESTRUCTOR_P (decl1
)
13643 || (DECL_CONSTRUCTOR_P (decl1
)
13644 && targetm
.cxx
.cdtor_returns_this ()))
13646 cdtor_label
= build_decl (input_location
,
13647 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13648 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13651 start_fname_decls ();
13653 store_parm_decls (current_function_parms
);
13659 /* Like start_preparsed_function, except that instead of a
13660 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13662 Returns true on success. If the DECLARATOR is not suitable
13663 for a function, we return false, which tells the parser to
13664 skip the entire function. */
13667 start_function (cp_decl_specifier_seq
*declspecs
,
13668 const cp_declarator
*declarator
,
13673 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13674 if (decl1
== error_mark_node
)
13676 /* If the declarator is not suitable for a function definition,
13677 cause a syntax error. */
13678 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13680 error ("invalid function declaration");
13684 if (DECL_MAIN_P (decl1
))
13685 /* main must return int. grokfndecl should have corrected it
13686 (and issued a diagnostic) if the user got it wrong. */
13687 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13688 integer_type_node
));
13690 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13693 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13697 use_eh_spec_block (tree fn
)
13699 return (flag_exceptions
&& flag_enforce_eh_specs
13700 && !processing_template_decl
13701 && !type_throw_all_p (TREE_TYPE (fn
))
13702 /* We insert the EH_SPEC_BLOCK only in the original
13703 function; then, it is copied automatically to the
13705 && !DECL_CLONED_FUNCTION_P (fn
)
13706 /* Implicitly-generated constructors and destructors have
13707 exception specifications. However, those specifications
13708 are the union of the possible exceptions specified by the
13709 constructors/destructors for bases and members, so no
13710 unallowed exception will ever reach this function. By
13711 not creating the EH_SPEC_BLOCK we save a little memory,
13712 and we avoid spurious warnings about unreachable
13714 && !DECL_DEFAULTED_FN (fn
));
13717 /* Store the parameter declarations into the current function declaration.
13718 This is called after parsing the parameter declarations, before
13719 digesting the body of the function.
13721 Also install to binding contour return value identifier, if any. */
13724 store_parm_decls (tree current_function_parms
)
13726 tree fndecl
= current_function_decl
;
13729 /* This is a chain of any other decls that came in among the parm
13730 declarations. If a parm is declared with enum {foo, bar} x;
13731 then CONST_DECLs for foo and bar are put here. */
13732 tree nonparms
= NULL_TREE
;
13734 if (current_function_parms
)
13736 /* This case is when the function was defined with an ANSI prototype.
13737 The parms already have decls, so we need not do anything here
13738 except record them as in effect
13739 and complain if any redundant old-style parm decls were written. */
13741 tree specparms
= current_function_parms
;
13744 /* Must clear this because it might contain TYPE_DECLs declared
13746 current_binding_level
->names
= NULL
;
13748 /* If we're doing semantic analysis, then we'll call pushdecl
13749 for each of these. We must do them in reverse order so that
13750 they end in the correct forward order. */
13751 specparms
= nreverse (specparms
);
13753 for (parm
= specparms
; parm
; parm
= next
)
13755 next
= DECL_CHAIN (parm
);
13756 if (TREE_CODE (parm
) == PARM_DECL
)
13758 if (DECL_NAME (parm
) == NULL_TREE
13759 || !VOID_TYPE_P (parm
))
13762 error ("parameter %qD declared void", parm
);
13766 /* If we find an enum constant or a type tag,
13767 put it aside for the moment. */
13768 TREE_CHAIN (parm
) = NULL_TREE
;
13769 nonparms
= chainon (nonparms
, parm
);
13773 /* Get the decls in their original chain order and record in the
13774 function. This is all and only the PARM_DECLs that were
13775 pushed into scope by the loop above. */
13776 DECL_ARGUMENTS (fndecl
) = getdecls ();
13779 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13781 /* Now store the final chain of decls for the arguments
13782 as the decl-chain of the current lexical scope.
13783 Put the enumerators in as well, at the front so that
13784 DECL_ARGUMENTS is not modified. */
13785 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13787 if (use_eh_spec_block (current_function_decl
))
13788 current_eh_spec_block
= begin_eh_spec_block ();
13792 /* We have finished doing semantic analysis on DECL, but have not yet
13793 generated RTL for its body. Save away our current state, so that
13794 when we want to generate RTL later we know what to do. */
13797 save_function_data (tree decl
)
13799 struct language_function
*f
;
13801 /* Save the language-specific per-function data so that we can
13802 get it back when we really expand this function. */
13803 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13806 f
= ggc_alloc
<language_function
> ();
13807 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13808 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13810 /* Clear out the bits we don't need. */
13811 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13812 f
->bindings
= NULL
;
13813 f
->x_local_names
= NULL
;
13814 f
->base
.local_typedefs
= NULL
;
13818 /* Set the return value of the constructor (if present). */
13821 finish_constructor_body (void)
13826 if (targetm
.cxx
.cdtor_returns_this ()
13827 && (! TYPE_FOR_JAVA (current_class_type
)))
13829 /* Any return from a constructor will end up here. */
13830 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13832 val
= DECL_ARGUMENTS (current_function_decl
);
13833 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13834 DECL_RESULT (current_function_decl
), val
);
13835 /* Return the address of the object. */
13836 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13837 add_stmt (exprstmt
);
13841 /* Do all the processing for the beginning of a destructor; set up the
13842 vtable pointers and cleanups for bases and members. */
13845 begin_destructor_body (void)
13847 tree compound_stmt
;
13849 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13850 issued an error message. We still want to try to process the
13851 body of the function, but initialize_vtbl_ptrs will crash if
13852 TYPE_BINFO is NULL. */
13853 if (COMPLETE_TYPE_P (current_class_type
))
13855 compound_stmt
= begin_compound_stmt (0);
13856 /* Make all virtual function table pointers in non-virtual base
13857 classes point to CURRENT_CLASS_TYPE's virtual function
13859 initialize_vtbl_ptrs (current_class_ptr
);
13860 finish_compound_stmt (compound_stmt
);
13862 /* Insert a cleanup to let the back end know that the object is dead
13863 when we exit the destructor, either normally or via exception. */
13864 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13865 tree clobber
= build_constructor (btype
, NULL
);
13866 TREE_THIS_VOLATILE (clobber
) = true;
13867 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13868 bref
= convert_from_reference (bref
);
13869 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13870 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13872 /* And insert cleanups for our bases and members so that they
13873 will be properly destroyed if we throw. */
13874 push_base_cleanups ();
13878 /* At the end of every destructor we generate code to delete the object if
13879 necessary. Do that now. */
13882 finish_destructor_body (void)
13886 /* Any return from a destructor will end up here; that way all base
13887 and member cleanups will be run when the function returns. */
13888 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13890 /* In a virtual destructor, we must call delete. */
13891 if (DECL_VIRTUAL_P (current_function_decl
))
13894 tree virtual_size
= cxx_sizeof (current_class_type
);
13898 At the point of definition of a virtual destructor (including
13899 an implicit definition), non-placement operator delete shall
13900 be looked up in the scope of the destructor's class and if
13901 found shall be accessible and unambiguous. */
13902 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13904 /*global_p=*/false,
13905 /*placement=*/NULL_TREE
,
13906 /*alloc_fn=*/NULL_TREE
,
13907 tf_warning_or_error
);
13909 if_stmt
= begin_if_stmt ();
13910 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13911 current_in_charge_parm
,
13914 finish_expr_stmt (exprstmt
);
13915 finish_then_clause (if_stmt
);
13916 finish_if_stmt (if_stmt
);
13919 if (targetm
.cxx
.cdtor_returns_this ())
13923 val
= DECL_ARGUMENTS (current_function_decl
);
13924 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13925 DECL_RESULT (current_function_decl
), val
);
13926 /* Return the address of the object. */
13927 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13928 add_stmt (exprstmt
);
13932 /* Do the necessary processing for the beginning of a function body, which
13933 in this case includes member-initializers, but not the catch clauses of
13934 a function-try-block. Currently, this means opening a binding level
13935 for the member-initializers (in a ctor), member cleanups (in a dtor),
13936 and capture proxies (in a lambda operator()). */
13939 begin_function_body (void)
13943 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13946 if (processing_template_decl
)
13947 /* Do nothing now. */;
13949 /* Always keep the BLOCK node associated with the outermost pair of
13950 curly braces of a function. These are needed for correct
13951 operation of dwarfout.c. */
13952 keep_next_level (true);
13954 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13956 if (processing_template_decl
)
13957 /* Do nothing now. */;
13958 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13959 begin_destructor_body ();
13964 /* Do the processing for the end of a function body. Currently, this means
13965 closing out the cleanups for fully-constructed bases and members, and in
13966 the case of the destructor, deleting the object if desired. Again, this
13967 is only meaningful for [cd]tors, since they are the only functions where
13968 there is a significant distinction between the main body and any
13969 function catch clauses. Handling, say, main() return semantics here
13970 would be wrong, as flowing off the end of a function catch clause for
13971 main() would also need to return 0. */
13974 finish_function_body (tree compstmt
)
13976 if (compstmt
== NULL_TREE
)
13979 /* Close the block. */
13980 finish_compound_stmt (compstmt
);
13982 if (processing_template_decl
)
13983 /* Do nothing now. */;
13984 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13985 finish_constructor_body ();
13986 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13987 finish_destructor_body ();
13990 /* Given a function, returns the BLOCK corresponding to the outermost level
13991 of curly braces, skipping the artificial block created for constructor
13995 outer_curly_brace_block (tree fndecl
)
13997 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13998 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13999 /* Skip the artificial function body block. */
14000 block
= BLOCK_SUBBLOCKS (block
);
14004 /* If FNDECL is a class's key method, add the class to the list of
14005 keyed classes that should be emitted. */
14008 record_key_method_defined (tree fndecl
)
14010 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14011 && DECL_VIRTUAL_P (fndecl
)
14012 && !processing_template_decl
)
14014 tree fnclass
= DECL_CONTEXT (fndecl
);
14015 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14016 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14020 /* Subroutine of finish_function.
14021 Save the body of constexpr functions for possible
14022 future compile time evaluation. */
14025 maybe_save_function_definition (tree fun
)
14027 if (!processing_template_decl
14028 && DECL_DECLARED_CONSTEXPR_P (fun
)
14029 && !cp_function_chain
->invalid_constexpr
14030 && !DECL_CLONED_FUNCTION_P (fun
))
14031 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14034 /* Finish up a function declaration and compile that function
14035 all the way to assembler language output. The free the storage
14036 for the function definition.
14038 FLAGS is a bitwise or of the following values:
14040 We just finished processing the body of an in-class inline
14041 function definition. (This processing will have taken place
14042 after the class definition is complete.) */
14045 finish_function (int flags
)
14047 tree fndecl
= current_function_decl
;
14048 tree fntype
, ctype
= NULL_TREE
;
14049 int inclass_inline
= (flags
& 2) != 0;
14051 /* When we get some parse errors, we can end up without a
14052 current_function_decl, so cope. */
14053 if (fndecl
== NULL_TREE
)
14054 return error_mark_node
;
14056 if (c_dialect_objc ())
14057 objc_finish_function ();
14059 gcc_assert (!defer_mark_used_calls
);
14060 defer_mark_used_calls
= true;
14062 record_key_method_defined (fndecl
);
14064 fntype
= TREE_TYPE (fndecl
);
14066 /* TREE_READONLY (fndecl) = 1;
14067 This caused &foo to be of type ptr-to-const-function
14068 which then got a warning when stored in a ptr-to-function variable. */
14070 gcc_assert (building_stmt_list_p ());
14071 /* The current function is being defined, so its DECL_INITIAL should
14072 be set, and unless there's a multiple definition, it should be
14073 error_mark_node. */
14074 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14076 /* For a cloned function, we've already got all the code we need;
14077 there's no need to add any extra bits. */
14078 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14080 /* Make it so that `main' always returns 0 by default. */
14081 if (DECL_MAIN_P (current_function_decl
))
14082 finish_return_stmt (integer_zero_node
);
14084 if (use_eh_spec_block (current_function_decl
))
14085 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14086 (TREE_TYPE (current_function_decl
)),
14087 current_eh_spec_block
);
14090 /* If we're saving up tree structure, tie off the function now. */
14091 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14093 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14094 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14096 finish_fname_decls ();
14098 /* If this function can't throw any exceptions, remember that. */
14099 if (!processing_template_decl
14100 && !cp_function_chain
->can_throw
14101 && !flag_non_call_exceptions
14102 && !decl_replaceable_p (fndecl
))
14103 TREE_NOTHROW (fndecl
) = 1;
14105 /* This must come after expand_function_end because cleanups might
14106 have declarations (from inline functions) that need to go into
14107 this function's blocks. */
14109 /* If the current binding level isn't the outermost binding level
14110 for this function, either there is a bug, or we have experienced
14111 syntax errors and the statement tree is malformed. */
14112 if (current_binding_level
->kind
!= sk_function_parms
)
14114 /* Make sure we have already experienced errors. */
14115 gcc_assert (errorcount
);
14117 /* Throw away the broken statement tree and extra binding
14119 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14121 while (current_binding_level
->kind
!= sk_function_parms
)
14123 if (current_binding_level
->kind
== sk_class
)
14124 pop_nested_class ();
14126 poplevel (0, 0, 0);
14129 poplevel (1, 0, 1);
14131 /* Statements should always be full-expressions at the outermost set
14132 of curly braces for a function. */
14133 gcc_assert (stmts_are_full_exprs_p ());
14135 /* If there are no return statements in a function with auto return type,
14136 the return type is void. But if the declared type is something like
14137 auto*, this is an error. */
14138 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14139 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14141 if (!is_auto (current_function_auto_return_pattern
)
14142 && !current_function_returns_value
&& !current_function_returns_null
)
14144 error ("no return statements in function returning %qT",
14145 current_function_auto_return_pattern
);
14146 inform (input_location
, "only plain %<auto%> return type can be "
14147 "deduced to %<void%>");
14149 apply_deduced_return_type (fndecl
, void_type_node
);
14150 fntype
= TREE_TYPE (fndecl
);
14153 /* Save constexpr function body before it gets munged by
14154 the NRV transformation. */
14155 maybe_save_function_definition (fndecl
);
14157 /* Set up the named return value optimization, if we can. Candidate
14158 variables are selected in check_return_expr. */
14159 if (current_function_return_value
)
14161 tree r
= current_function_return_value
;
14164 if (r
!= error_mark_node
14165 /* This is only worth doing for fns that return in memory--and
14166 simpler, since we don't have to worry about promoted modes. */
14167 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14168 /* Only allow this for variables declared in the outer scope of
14169 the function so we know that their lifetime always ends with a
14170 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14171 we were to do this optimization in tree-ssa. */
14172 && (outer
= outer_curly_brace_block (fndecl
))
14173 && chain_member (r
, BLOCK_VARS (outer
)))
14174 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14176 current_function_return_value
= NULL_TREE
;
14179 /* Remember that we were in class scope. */
14180 if (current_class_name
)
14181 ctype
= current_class_type
;
14183 /* Must mark the RESULT_DECL as being in this function. */
14184 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14186 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14187 to the FUNCTION_DECL node itself. */
14188 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14190 /* Save away current state, if appropriate. */
14191 if (!processing_template_decl
)
14192 save_function_data (fndecl
);
14194 /* Complain if there's just no return statement. */
14195 if (warn_return_type
14196 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14197 && !dependent_type_p (TREE_TYPE (fntype
))
14198 && !current_function_returns_value
&& !current_function_returns_null
14199 /* Don't complain if we abort or throw. */
14200 && !current_function_returns_abnormally
14201 /* Don't complain if there's an infinite loop. */
14202 && !current_function_infinite_loop
14203 /* Don't complain if we are declared noreturn. */
14204 && !TREE_THIS_VOLATILE (fndecl
)
14205 && !DECL_NAME (DECL_RESULT (fndecl
))
14206 && !TREE_NO_WARNING (fndecl
)
14207 /* Structor return values (if any) are set by the compiler. */
14208 && !DECL_CONSTRUCTOR_P (fndecl
)
14209 && !DECL_DESTRUCTOR_P (fndecl
)
14210 && targetm
.warn_func_return (fndecl
))
14212 warning (OPT_Wreturn_type
,
14213 "no return statement in function returning non-void");
14214 TREE_NO_WARNING (fndecl
) = 1;
14217 /* Store the end of the function, so that we get good line number
14218 info for the epilogue. */
14219 cfun
->function_end_locus
= input_location
;
14221 /* Complain about parameters that are only set, but never otherwise used. */
14222 if (warn_unused_but_set_parameter
14223 && !processing_template_decl
14224 && errorcount
== unused_but_set_errorcount
14225 && !DECL_CLONED_FUNCTION_P (fndecl
))
14229 for (decl
= DECL_ARGUMENTS (fndecl
);
14231 decl
= DECL_CHAIN (decl
))
14232 if (TREE_USED (decl
)
14233 && TREE_CODE (decl
) == PARM_DECL
14234 && !DECL_READ_P (decl
)
14235 && DECL_NAME (decl
)
14236 && !DECL_ARTIFICIAL (decl
)
14237 && !TREE_NO_WARNING (decl
)
14238 && !DECL_IN_SYSTEM_HEADER (decl
)
14239 && TREE_TYPE (decl
) != error_mark_node
14240 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14241 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14242 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14243 warning (OPT_Wunused_but_set_parameter
,
14244 "parameter %q+D set but not used", decl
);
14245 unused_but_set_errorcount
= errorcount
;
14248 /* Complain about locally defined typedefs that are not used in this
14250 maybe_warn_unused_local_typedefs ();
14252 /* Genericize before inlining. */
14253 if (!processing_template_decl
)
14255 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14256 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14257 cp_genericize (fndecl
);
14258 /* Clear out the bits we don't need. */
14259 f
->x_current_class_ptr
= NULL
;
14260 f
->x_current_class_ref
= NULL
;
14261 f
->x_eh_spec_block
= NULL
;
14262 f
->x_in_charge_parm
= NULL
;
14263 f
->x_vtt_parm
= NULL
;
14264 f
->x_return_value
= NULL
;
14265 f
->bindings
= NULL
;
14266 f
->extern_decl_map
= NULL
;
14267 f
->infinite_loops
= NULL
;
14269 /* Clear out the bits we don't need. */
14270 local_names
= NULL
;
14272 /* We're leaving the context of this function, so zap cfun. It's still in
14273 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14275 current_function_decl
= NULL
;
14277 /* If this is an in-class inline definition, we may have to pop the
14278 bindings for the template parameters that we added in
14279 maybe_begin_member_template_processing when start_function was
14281 if (inclass_inline
)
14282 maybe_end_member_template_processing ();
14284 /* Leave the scope of the class. */
14286 pop_nested_class ();
14291 current_function_decl
= NULL_TREE
;
14293 defer_mark_used_calls
= false;
14294 if (deferred_mark_used_calls
)
14299 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14301 vec_free (deferred_mark_used_calls
);
14307 /* Create the FUNCTION_DECL for a function definition.
14308 DECLSPECS and DECLARATOR are the parts of the declaration;
14309 they describe the return type and the name of the function,
14310 but twisted together in a fashion that parallels the syntax of C.
14312 This function creates a binding context for the function body
14313 as well as setting up the FUNCTION_DECL in current_function_decl.
14315 Returns a FUNCTION_DECL on success.
14317 If the DECLARATOR is not suitable for a function (it defines a datum
14318 instead), we return 0, which tells yyparse to report a parse error.
14320 May return void_type_node indicating that this method is actually
14321 a friend. See grokfield for more details.
14323 Came here with a `.pushlevel' .
14325 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14326 CHANGES TO CODE IN `grokfield'. */
14329 grokmethod (cp_decl_specifier_seq
*declspecs
,
14330 const cp_declarator
*declarator
, tree attrlist
)
14332 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14335 if (fndecl
== error_mark_node
)
14336 return error_mark_node
;
14338 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14340 error ("invalid member function declaration");
14341 return error_mark_node
;
14345 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14347 /* Pass friends other than inline friend functions back. */
14348 if (fndecl
== void_type_node
)
14351 if (DECL_IN_AGGR_P (fndecl
))
14353 if (DECL_CLASS_SCOPE_P (fndecl
))
14354 error ("%qD is already defined in class %qT", fndecl
,
14355 DECL_CONTEXT (fndecl
));
14356 return error_mark_node
;
14359 check_template_shadow (fndecl
);
14361 DECL_COMDAT (fndecl
) = 1;
14362 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14363 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14365 /* We process method specializations in finish_struct_1. */
14366 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14368 fndecl
= push_template_decl (fndecl
);
14369 if (fndecl
== error_mark_node
)
14373 if (! DECL_FRIEND_P (fndecl
))
14375 if (DECL_CHAIN (fndecl
))
14377 fndecl
= copy_node (fndecl
);
14378 TREE_CHAIN (fndecl
) = NULL_TREE
;
14382 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14384 DECL_IN_AGGR_P (fndecl
) = 1;
14389 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14390 we can lay it out later, when and if its type becomes complete.
14392 Also handle constexpr variables where the initializer involves
14393 an unlowered PTRMEM_CST because the class isn't complete yet. */
14396 maybe_register_incomplete_var (tree var
)
14398 gcc_assert (VAR_P (var
));
14400 /* Keep track of variables with incomplete types. */
14401 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14402 && DECL_EXTERNAL (var
))
14404 tree inner_type
= TREE_TYPE (var
);
14406 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14407 inner_type
= TREE_TYPE (inner_type
);
14408 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14410 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14411 /* RTTI TD entries are created while defining the type_info. */
14412 || (TYPE_LANG_SPECIFIC (inner_type
)
14413 && TYPE_BEING_DEFINED (inner_type
)))
14415 incomplete_var iv
= {var
, inner_type
};
14416 vec_safe_push (incomplete_vars
, iv
);
14418 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14419 && decl_constant_var_p (var
)
14420 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14422 /* When the outermost open class is complete we can resolve any
14423 pointers-to-members. */
14424 tree context
= outermost_open_class ();
14425 incomplete_var iv
= {var
, context
};
14426 vec_safe_push (incomplete_vars
, iv
);
14431 /* Called when a class type (given by TYPE) is defined. If there are
14432 any existing VAR_DECLs whose type has been completed by this
14433 declaration, update them now. */
14436 complete_vars (tree type
)
14439 incomplete_var
*iv
;
14441 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14443 if (same_type_p (type
, iv
->incomplete_type
))
14445 tree var
= iv
->decl
;
14446 tree type
= TREE_TYPE (var
);
14448 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14449 == iv
->incomplete_type
)
14451 /* Complete the type of the variable. The VAR_DECL itself
14452 will be laid out in expand_expr. */
14453 complete_type (type
);
14454 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14457 if (DECL_INITIAL (var
)
14458 && decl_constant_var_p (var
))
14459 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14461 /* Remove this entry from the list. */
14462 incomplete_vars
->unordered_remove (ix
);
14468 /* Check for pending declarations which may have abstract type. */
14469 complete_type_check_abstract (type
);
14472 /* If DECL is of a type which needs a cleanup, build and return an
14473 expression to perform that cleanup here. Return NULL_TREE if no
14474 cleanup need be done. */
14477 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14483 /* Assume no cleanup is required. */
14484 cleanup
= NULL_TREE
;
14486 if (error_operand_p (decl
))
14489 /* Handle "__attribute__((cleanup))". We run the cleanup function
14490 before the destructor since the destructor is what actually
14491 terminates the lifetime of the object. */
14492 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14499 /* Get the name specified by the user for the cleanup function. */
14500 id
= TREE_VALUE (TREE_VALUE (attr
));
14501 /* Look up the name to find the cleanup function to call. It is
14502 important to use lookup_name here because that is what is
14503 used in c-common.c:handle_cleanup_attribute when performing
14504 initial checks on the attribute. Note that those checks
14505 include ensuring that the function found is not an overloaded
14506 function, or an object with an overloaded call operator,
14507 etc.; we can rely on the fact that the function found is an
14508 ordinary FUNCTION_DECL. */
14509 fn
= lookup_name (id
);
14510 arg
= build_address (decl
);
14512 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14513 if (cleanup
== error_mark_node
)
14514 return error_mark_node
;
14516 /* Handle ordinary C++ destructors. */
14517 type
= TREE_TYPE (decl
);
14518 if (type_build_dtor_call (type
))
14520 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14524 if (TREE_CODE (type
) == ARRAY_TYPE
)
14527 addr
= build_address (decl
);
14529 call
= build_delete (TREE_TYPE (addr
), addr
,
14530 sfk_complete_destructor
, flags
, 0, complain
);
14531 if (call
== error_mark_node
)
14532 cleanup
= error_mark_node
;
14533 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14534 /* Discard the call. */;
14536 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14541 /* build_delete sets the location of the destructor call to the
14542 current location, even though the destructor is going to be
14543 called later, at the end of the current scope. This can lead to
14544 a "jumpy" behaviour for users of debuggers when they step around
14545 the end of the block. So let's unset the location of the
14546 destructor call instead. */
14547 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14548 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14551 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14552 /* Treat objects with destructors as used; the destructor may do
14553 something substantive. */
14560 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14561 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14562 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14565 static_fn_type (tree memfntype
)
14570 if (TYPE_PTRMEMFUNC_P (memfntype
))
14571 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14572 if (POINTER_TYPE_P (memfntype
)
14573 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14574 memfntype
= TREE_TYPE (memfntype
);
14575 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14577 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14578 args
= TYPE_ARG_TYPES (memfntype
);
14579 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14580 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14581 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14582 fntype
= (cp_build_type_attribute_variant
14583 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14584 fntype
= (build_exception_variant
14585 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14586 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14587 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14591 /* DECL was originally constructed as a non-static member function,
14592 but turned out to be static. Update it accordingly. */
14595 revert_static_member_fn (tree decl
)
14597 tree stype
= static_fn_type (decl
);
14598 cp_cv_quals quals
= type_memfn_quals (stype
);
14599 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14601 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14602 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14604 TREE_TYPE (decl
) = stype
;
14606 if (DECL_ARGUMENTS (decl
))
14607 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14608 DECL_STATIC_FUNCTION_P (decl
) = 1;
14611 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14612 one of the language-independent trees. */
14614 enum cp_tree_node_structure_enum
14615 cp_tree_node_structure (union lang_tree_node
* t
)
14617 switch (TREE_CODE (&t
->generic
))
14619 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14620 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14621 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14622 case OVERLOAD
: return TS_CP_OVERLOAD
;
14623 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14624 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14625 case BASELINK
: return TS_CP_BASELINK
;
14626 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14627 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14628 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14629 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14630 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14631 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14632 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14633 default: return TS_CP_GENERIC
;
14637 /* Build the void_list_node (void_type_node having been created). */
14639 build_void_list_node (void)
14641 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14646 cp_missing_noreturn_ok_p (tree decl
)
14648 /* A missing noreturn is ok for the `main' function. */
14649 return DECL_MAIN_P (decl
);
14652 /* Return the decl used to identify the COMDAT group into which DECL should
14656 cxx_comdat_group (tree decl
)
14658 /* Virtual tables, construction virtual tables, and virtual table
14659 tables all go in a single COMDAT group, named after the primary
14661 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14662 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14663 /* For all other DECLs, the COMDAT group is the mangled name of the
14664 declaration itself. */
14667 while (DECL_THUNK_P (decl
))
14669 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14670 into the same section as the target function. In that case
14671 we must return target's name. */
14672 tree target
= THUNK_TARGET (decl
);
14673 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14674 && DECL_SECTION_NAME (target
) != NULL
14675 && DECL_ONE_ONLY (target
))
14685 /* Returns the return type for FN as written by the user, which may include
14686 a placeholder for a deduced return type. */
14689 fndecl_declared_return_type (tree fn
)
14691 fn
= STRIP_TEMPLATE (fn
);
14692 if (FNDECL_USED_AUTO (fn
))
14694 struct language_function
*f
= NULL
;
14695 if (DECL_STRUCT_FUNCTION (fn
))
14696 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14698 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14699 return f
->x_auto_return_pattern
;
14701 return TREE_TYPE (TREE_TYPE (fn
));
14704 /* Returns true iff DECL was declared with an auto return type and it has
14705 not yet been deduced to a real type. */
14708 undeduced_auto_decl (tree decl
)
14710 if (cxx_dialect
< cxx14
)
14712 return type_uses_auto (TREE_TYPE (decl
));
14715 /* Complain if DECL has an undeduced return type. */
14718 require_deduced_type (tree decl
)
14720 if (undeduced_auto_decl (decl
))
14721 error ("use of %qD before deduction of %<auto%>", decl
);
14724 #include "gt-cp-decl.h"