1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
47 #include "c-family/c-common.h"
48 #include "c-family/c-objc.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "pointer-set.h"
55 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR
, /* variable */
61 BSP_PARM
, /* parameter */
66 static tree
grokparms (tree parmlist
, tree
*);
67 static const char *redeclaration_error_message (tree
, tree
);
69 static int decl_jump_unsafe (tree
);
70 static void require_complete_types_for_parms (tree
);
71 static int ambi_op_p (enum tree_code
);
72 static int unary_op_p (enum tree_code
);
73 static void push_local_name (tree
);
74 static tree
grok_reference_init (tree
, tree
, tree
, int);
75 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
77 static int check_static_variable_definition (tree
, tree
);
78 static void record_unknown_type (tree
, const char *);
79 static tree
builtin_function_1 (tree
, tree
, bool);
80 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
81 static int member_function_or_else (tree
, tree
, enum overload_flags
);
82 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
84 static void check_for_uninitialized_const_var (tree
);
85 static hashval_t
typename_hash (const void *);
86 static int typename_compare (const void *, const void *);
87 static tree
local_variable_p_walkfn (tree
*, int *, void *);
88 static tree
record_builtin_java_type (const char *, int);
89 static const char *tag_name (enum tag_types
);
90 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
91 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
92 static void maybe_deduce_size_from_array_init (tree
, tree
);
93 static void layout_var_decl (tree
);
94 static tree
check_initializer (tree
, tree
, int, VEC(tree
,gc
) **);
95 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
96 static void save_function_data (tree
);
97 static void copy_type_enum (tree
, tree
);
98 static void check_function_type (tree
, tree
);
99 static void finish_constructor_body (void);
100 static void begin_destructor_body (void);
101 static void finish_destructor_body (void);
102 static void record_key_method_defined (tree
);
103 static tree
create_array_type_for_decl (tree
, tree
, tree
);
104 static tree
get_atexit_node (void);
105 static tree
get_dso_handle_node (void);
106 static tree
start_cleanup_fn (void);
107 static void end_cleanup_fn (void);
108 static tree
cp_make_fname_decl (location_t
, tree
, int);
109 static void initialize_predefined_identifiers (void);
110 static tree check_special_function_return_type
111 (special_function_kind
, tree
, tree
);
112 static tree
push_cp_library_fn (enum tree_code
, tree
);
113 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
114 static void store_parm_decls (tree
);
115 static void initialize_local_var (tree
, tree
);
116 static void expand_static_init (tree
, tree
);
118 /* The following symbols are subsumed in the cp_global_trees array, and
119 listed here individually for documentation purposes.
122 tree wchar_decl_node;
124 tree vtable_entry_type;
125 tree delta_type_node;
126 tree __t_desc_type_node;
128 tree class_type_node;
129 tree unknown_type_node;
131 Array type `vtable_entry_type[]'
134 tree vtbl_ptr_type_node;
141 A FUNCTION_DECL which can call `abort'. Not necessarily the
142 one that the user will declare, but sufficient to be called
143 by routines that want to abort the program.
147 The FUNCTION_DECL for the default `::operator delete'.
149 tree global_delete_fndecl;
152 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
153 tree tinfo_var_id; */
155 tree cp_global_trees
[CPTI_MAX
];
157 /* Indicates that there is a type value in some namespace, although
158 that is not necessarily in scope at the moment. */
160 tree global_type_node
;
162 /* The node that holds the "name" of the global scope. */
163 tree global_scope_name
;
165 #define local_names cp_function_chain->x_local_names
167 /* A list of objects which have constructors or destructors
168 which reside in the global scope. The decl is stored in
169 the TREE_VALUE slot and the initializer is stored
170 in the TREE_PURPOSE slot. */
171 tree static_aggregates
;
175 /* A node for the integer constant 2. */
177 tree integer_two_node
;
179 /* Used only for jumps to as-yet undefined labels, since jumps to
180 defined labels can have their validity checked immediately. */
182 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
183 struct named_label_use_entry
*next
;
184 /* The binding level to which this entry is *currently* attached.
185 This is initially the binding level in which the goto appeared,
186 but is modified as scopes are closed. */
187 cp_binding_level
*binding_level
;
188 /* The head of the names list that was current when the goto appeared,
189 or the inner scope popped. These are the decls that will *not* be
190 skipped when jumping to the label. */
192 /* The location of the goto, for error reporting. */
193 location_t o_goto_locus
;
194 /* True if an OpenMP structured block scope has been closed since
195 the goto appeared. This means that the branch from the label will
196 illegally exit an OpenMP scope. */
200 /* A list of all LABEL_DECLs in the function that have names. Here so
201 we can clear out their names' definitions at the end of the
202 function, and so we can check the validity of jumps to these labels. */
204 struct GTY(()) named_label_entry
{
205 /* The decl itself. */
208 /* The binding level to which the label is *currently* attached.
209 This is initially set to the binding level in which the label
210 is defined, but is modified as scopes are closed. */
211 cp_binding_level
*binding_level
;
212 /* The head of the names list that was current when the label was
213 defined, or the inner scope popped. These are the decls that will
214 be skipped when jumping to the label. */
216 /* A vector of all decls from all binding levels that would be
217 crossed by a backward branch to the label. */
218 VEC(tree
,gc
) *bad_decls
;
220 /* A list of uses of the label, before the label is defined. */
221 struct named_label_use_entry
*uses
;
223 /* The following bits are set after the label is defined, and are
224 updated as scopes are popped. They indicate that a backward jump
225 to the label will illegally enter a scope of the given flavor. */
231 #define named_labels cp_function_chain->x_named_labels
233 /* The number of function bodies which we are currently processing.
234 (Zero if we are at namespace scope, one inside the body of a
235 function, two inside the body of a function in a local class, etc.) */
238 /* To avoid unwanted recursion, finish_function defers all mark_used calls
239 encountered during its execution until it finishes. */
240 bool defer_mark_used_calls
;
241 VEC(tree
, gc
) *deferred_mark_used_calls
;
243 /* States indicating how grokdeclarator() should handle declspecs marked
244 with __attribute__((deprecated)). An object declared as
245 __attribute__((deprecated)) suppresses warnings of uses of other
247 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
250 /* A list of VAR_DECLs whose type was incomplete at the time the
251 variable was declared. */
253 typedef struct GTY(()) incomplete_var_d
{
255 tree incomplete_type
;
258 DEF_VEC_O(incomplete_var
);
259 DEF_VEC_ALLOC_O(incomplete_var
,gc
);
261 static GTY(()) VEC(incomplete_var
,gc
) *incomplete_vars
;
263 /* Returns the kind of template specialization we are currently
264 processing, given that it's declaration contained N_CLASS_SCOPES
265 explicit scope qualifications. */
268 current_tmpl_spec_kind (int n_class_scopes
)
270 int n_template_parm_scopes
= 0;
271 int seen_specialization_p
= 0;
272 int innermost_specialization_p
= 0;
275 /* Scan through the template parameter scopes. */
276 for (b
= current_binding_level
;
277 b
->kind
== sk_template_parms
;
280 /* If we see a specialization scope inside a parameter scope,
281 then something is wrong. That corresponds to a declaration
284 template <class T> template <> ...
286 which is always invalid since [temp.expl.spec] forbids the
287 specialization of a class member template if the enclosing
288 class templates are not explicitly specialized as well. */
289 if (b
->explicit_spec_p
)
291 if (n_template_parm_scopes
== 0)
292 innermost_specialization_p
= 1;
294 seen_specialization_p
= 1;
296 else if (seen_specialization_p
== 1)
297 return tsk_invalid_member_spec
;
299 ++n_template_parm_scopes
;
302 /* Handle explicit instantiations. */
303 if (processing_explicit_instantiation
)
305 if (n_template_parm_scopes
!= 0)
306 /* We've seen a template parameter list during an explicit
307 instantiation. For example:
309 template <class T> template void f(int);
311 This is erroneous. */
312 return tsk_invalid_expl_inst
;
314 return tsk_expl_inst
;
317 if (n_template_parm_scopes
< n_class_scopes
)
318 /* We've not seen enough template headers to match all the
319 specialized classes present. For example:
321 template <class T> void R<T>::S<T>::f(int);
323 This is invalid; there needs to be one set of template
324 parameters for each class. */
325 return tsk_insufficient_parms
;
326 else if (n_template_parm_scopes
== n_class_scopes
)
327 /* We're processing a non-template declaration (even though it may
328 be a member of a template class.) For example:
330 template <class T> void S<T>::f(int);
332 The `class T' matches the `S<T>', leaving no template headers
333 corresponding to the `f'. */
335 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
336 /* We've got too many template headers. For example:
338 template <> template <class T> void f (T);
340 There need to be more enclosing classes. */
341 return tsk_excessive_parms
;
343 /* This must be a template. It's of the form:
345 template <class T> template <class U> void S<T>::f(U);
347 This is a specialization if the innermost level was a
348 specialization; otherwise it's just a definition of the
350 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
353 /* Exit the current scope. */
361 /* When a label goes out of scope, check to see if that label was used
362 in a valid manner, and issue any appropriate warnings or errors. */
365 pop_label (tree label
, tree old_value
)
367 if (!processing_template_decl
)
369 if (DECL_INITIAL (label
) == NULL_TREE
)
373 error ("label %q+D used but not defined", label
);
374 location
= input_location
; /* FIXME want (input_filename, (line)0) */
375 /* Avoid crashing later. */
376 define_label (location
, DECL_NAME (label
));
379 warn_for_unused_label (label
);
382 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
385 /* At the end of a function, all labels declared within the function
386 go out of scope. BLOCK is the top-level block for the
390 pop_labels_1 (void **slot
, void *data
)
392 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
393 tree block
= (tree
) data
;
395 pop_label (ent
->label_decl
, NULL_TREE
);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
400 BLOCK_VARS (block
) = ent
->label_decl
;
402 htab_clear_slot (named_labels
, slot
);
408 pop_labels (tree block
)
412 htab_traverse (named_labels
, pop_labels_1
, block
);
417 /* At the end of a block with local labels, restore the outer definition. */
420 pop_local_label (tree label
, tree old_value
)
422 struct named_label_entry dummy
;
425 pop_label (label
, old_value
);
427 dummy
.label_decl
= label
;
428 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
429 htab_clear_slot (named_labels
, slot
);
432 /* The following two routines are used to interface to Objective-C++.
433 The binding level is purposely treated as an opaque type. */
436 objc_get_current_scope (void)
438 return current_binding_level
;
441 /* The following routine is used by the NeXT-style SJLJ exceptions;
442 variables get marked 'volatile' so as to not be clobbered by
443 _setjmp()/_longjmp() calls. All variables in the current scope,
444 as well as parent scopes up to (but not including) ENCLOSING_BLK
445 shall be thusly marked. */
448 objc_mark_locals_volatile (void *enclosing_blk
)
450 cp_binding_level
*scope
;
452 for (scope
= current_binding_level
;
453 scope
&& scope
!= enclosing_blk
;
454 scope
= scope
->level_chain
)
458 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
459 objc_volatilize_decl (decl
);
461 /* Do not climb up past the current function. */
462 if (scope
->kind
== sk_function_parms
)
467 /* Update data for defined and undefined labels when leaving a scope. */
470 poplevel_named_label_1 (void **slot
, void *data
)
472 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
473 cp_binding_level
*bl
= (cp_binding_level
*) data
;
474 cp_binding_level
*obl
= bl
->level_chain
;
476 if (ent
->binding_level
== bl
)
480 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
481 TREE_LISTs representing OVERLOADs, so be careful. */
482 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
484 : TREE_CHAIN (decl
)))
485 if (decl_jump_unsafe (decl
))
486 VEC_safe_push (tree
, gc
, ent
->bad_decls
, decl
);
488 ent
->binding_level
= obl
;
489 ent
->names_in_scope
= obl
->names
;
493 ent
->in_try_scope
= true;
496 ent
->in_catch_scope
= true;
499 ent
->in_omp_scope
= true;
507 struct named_label_use_entry
*use
;
509 for (use
= ent
->uses
; use
; use
= use
->next
)
510 if (use
->binding_level
== bl
)
512 use
->binding_level
= obl
;
513 use
->names_in_scope
= obl
->names
;
514 if (bl
->kind
== sk_omp
)
515 use
->in_omp_scope
= true;
522 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
523 when errors were reported, except for -Werror-unused-but-set-*. */
524 static int unused_but_set_errorcount
;
526 /* Exit a binding level.
527 Pop the level off, and restore the state of the identifier-decl mappings
528 that were in effect when this level was entered.
530 If KEEP == 1, this level had explicit declarations, so
531 and create a "block" (a BLOCK node) for the level
532 to record its declarations and subblocks for symbol table output.
534 If FUNCTIONBODY is nonzero, this level is the body of a function,
535 so create a block as if KEEP were set and also clear out all
538 If REVERSE is nonzero, reverse the order of decls before putting
539 them into the BLOCK. */
542 poplevel (int keep
, int reverse
, int functionbody
)
545 /* The chain of decls was accumulated in reverse order.
546 Put it into forward order, just for cleanliness. */
551 int leaving_for_scope
;
554 cp_label_binding
*label_bind
;
556 timevar_start (TV_NAME_LOOKUP
);
561 gcc_assert (current_binding_level
->kind
!= sk_class
);
563 if (current_binding_level
->kind
== sk_cleanup
)
565 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
567 gcc_assert (!VEC_length(cp_class_binding
,
568 current_binding_level
->class_shadowed
));
570 /* We used to use KEEP == 2 to indicate that the new block should go
571 at the beginning of the list of blocks at this binding level,
572 rather than the end. This hack is no longer used. */
573 gcc_assert (keep
== 0 || keep
== 1);
575 if (current_binding_level
->keep
)
578 /* Any uses of undefined labels, and any defined labels, now operate
579 under constraints of next binding contour. */
580 if (cfun
&& !functionbody
&& named_labels
)
581 htab_traverse (named_labels
, poplevel_named_label_1
,
582 current_binding_level
);
584 /* Get the decls in the order they were written.
585 Usually current_binding_level->names is in reverse order.
586 But parameter decls were previously put in forward order. */
589 current_binding_level
->names
590 = decls
= nreverse (current_binding_level
->names
);
592 decls
= current_binding_level
->names
;
594 /* If there were any declarations or structure tags in that level,
595 or if this level is a function body,
596 create a BLOCK to record them for the life of this function. */
598 if (keep
== 1 || functionbody
)
599 block
= make_node (BLOCK
);
600 if (block
!= NULL_TREE
)
602 BLOCK_VARS (block
) = decls
;
603 BLOCK_SUBBLOCKS (block
) = subblocks
;
606 /* In each subblock, record that this is its superior. */
608 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
609 BLOCK_SUPERCONTEXT (link
) = block
;
611 /* We still support the old for-scope rules, whereby the variables
612 in a for-init statement were in scope after the for-statement
613 ended. We only use the new rules if flag_new_for_scope is
616 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
618 /* Before we remove the declarations first check for unused variables. */
619 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
620 && !processing_template_decl
)
621 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
622 if (TREE_CODE (decl
) == VAR_DECL
623 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
624 && ! DECL_IN_SYSTEM_HEADER (decl
)
625 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
627 if (! TREE_USED (decl
))
628 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
629 else if (DECL_CONTEXT (decl
) == current_function_decl
630 && TREE_TYPE (decl
) != error_mark_node
631 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
632 && errorcount
== unused_but_set_errorcount
633 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
634 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
636 warning (OPT_Wunused_but_set_variable
,
637 "variable %q+D set but not used", decl
);
638 unused_but_set_errorcount
= errorcount
;
642 /* Remove declarations for all the DECLs in this level. */
643 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
645 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
646 /* It's hard to make this ARM compatibility hack play nicely with
647 lambdas, and it really isn't necessary in C++11 mode. */
648 && cxx_dialect
< cxx0x
651 tree name
= DECL_NAME (link
);
655 ob
= outer_binding (name
,
656 IDENTIFIER_BINDING (name
),
659 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
661 ns_binding
= NULL_TREE
;
663 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
664 /* We have something like:
669 and we are leaving the `for' scope. There's no reason to
670 keep the binding of the inner `i' in this case. */
671 pop_binding (name
, link
);
672 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
673 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
674 /* Here, we have something like:
682 We must pop the for-scope binding so we know what's a
683 type and what isn't. */
684 pop_binding (name
, link
);
687 /* Mark this VAR_DECL as dead so that we can tell we left it
688 there only for backward compatibility. */
689 DECL_DEAD_FOR_LOCAL (link
) = 1;
691 /* Keep track of what should have happened when we
692 popped the binding. */
695 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
696 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
699 /* Add it to the list of dead variables in the next
700 outermost binding to that we can remove these when we
701 leave that binding. */
702 VEC_safe_push (tree
, gc
,
703 current_binding_level
->level_chain
->dead_vars_from_for
,
706 /* Although we don't pop the cxx_binding, we do clear
707 its SCOPE since the scope is going away now. */
708 IDENTIFIER_BINDING (name
)->scope
709 = current_binding_level
->level_chain
;
716 /* Remove the binding. */
719 if (TREE_CODE (decl
) == TREE_LIST
)
720 decl
= TREE_VALUE (decl
);
723 if (TREE_CODE (name
) == OVERLOAD
)
724 name
= OVL_FUNCTION (name
);
726 gcc_assert (DECL_P (name
));
727 pop_binding (DECL_NAME (name
), decl
);
731 /* Remove declarations for any `for' variables from inner scopes
732 that we kept around. */
733 FOR_EACH_VEC_ELT_REVERSE (tree
, current_binding_level
->dead_vars_from_for
,
735 pop_binding (DECL_NAME (decl
), decl
);
737 /* Restore the IDENTIFIER_TYPE_VALUEs. */
738 for (link
= current_binding_level
->type_shadowed
;
739 link
; link
= TREE_CHAIN (link
))
740 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
742 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
743 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding
,
744 current_binding_level
->shadowed_labels
,
746 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
748 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
749 list if a `using' declaration put them there. The debugging
750 back ends won't understand OVERLOAD, so we remove them here.
751 Because the BLOCK_VARS are (temporarily) shared with
752 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
753 popped all the bindings. */
758 for (d
= &BLOCK_VARS (block
); *d
; )
760 if (TREE_CODE (*d
) == TREE_LIST
)
761 *d
= TREE_CHAIN (*d
);
763 d
= &DECL_CHAIN (*d
);
767 /* If the level being exited is the top level of a function,
768 check over all the labels. */
771 /* Since this is the top level block of a function, the vars are
772 the function's parameters. Don't leave them in the BLOCK
773 because they are found in the FUNCTION_DECL instead. */
774 BLOCK_VARS (block
) = 0;
778 kind
= current_binding_level
->kind
;
779 if (kind
== sk_cleanup
)
783 /* If this is a temporary binding created for a cleanup, then we'll
784 have pushed a statement list level. Pop that, create a new
785 BIND_EXPR for the block, and insert it into the stream. */
786 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
787 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
794 /* The current function is being defined, so its DECL_INITIAL
795 should be error_mark_node. */
796 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
797 DECL_INITIAL (current_function_decl
) = block
;
800 current_binding_level
->blocks
801 = block_chainon (current_binding_level
->blocks
, block
);
803 /* If we did not make a block for the level just exited,
804 any blocks made for inner levels
805 (since they cannot be recorded as subblocks in that level)
806 must be carried forward so they will later become subblocks
807 of something else. */
809 current_binding_level
->blocks
810 = block_chainon (current_binding_level
->blocks
, subblocks
);
812 /* Each and every BLOCK node created here in `poplevel' is important
813 (e.g. for proper debugging information) so if we created one
814 earlier, mark it as "used". */
816 TREE_USED (block
) = 1;
818 /* All temporary bindings created for cleanups are popped silently. */
819 if (kind
== sk_cleanup
)
822 timevar_stop (TV_NAME_LOOKUP
);
826 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
827 itself, calling F for each. The DATA is passed to F as well. */
830 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
833 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
835 result
|= (*f
) (name_space
, data
);
837 for (; current
; current
= DECL_CHAIN (current
))
838 result
|= walk_namespaces_r (current
, f
, data
);
843 /* Walk all the namespaces, calling F for each. The DATA is passed to
847 walk_namespaces (walk_namespaces_fn f
, void* data
)
849 return walk_namespaces_r (global_namespace
, f
, data
);
852 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
853 DATA is non-NULL, this is the last time we will call
854 wrapup_global_declarations for this NAMESPACE. */
857 wrapup_globals_for_namespace (tree name_space
, void* data
)
859 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
860 VEC(tree
,gc
) *statics
= level
->static_decls
;
861 tree
*vec
= VEC_address (tree
, statics
);
862 int len
= VEC_length (tree
, statics
);
863 int last_time
= (data
!= 0);
867 check_global_declarations (vec
, len
);
868 emit_debug_global_declarations (vec
, len
);
872 /* Write out any globals that need to be output. */
873 return wrapup_global_declarations (vec
, len
);
877 /* In C++, you don't have to write `struct S' to refer to `S'; you
878 can just use `S'. We accomplish this by creating a TYPE_DECL as
879 if the user had written `typedef struct S S'. Create and return
880 the TYPE_DECL for TYPE. */
883 create_implicit_typedef (tree name
, tree type
)
887 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
888 DECL_ARTIFICIAL (decl
) = 1;
889 /* There are other implicit type declarations, like the one *within*
890 a class that allows you to write `S::S'. We must distinguish
892 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
893 TYPE_NAME (type
) = decl
;
894 TYPE_STUB_DECL (type
) = decl
;
899 /* Remember a local name for name-mangling purposes. */
902 push_local_name (tree decl
)
907 timevar_start (TV_NAME_LOOKUP
);
909 name
= DECL_NAME (decl
);
911 nelts
= VEC_length (tree
, local_names
);
912 for (i
= 0; i
< nelts
; i
++)
914 t
= VEC_index (tree
, local_names
, i
);
915 if (DECL_NAME (t
) == name
)
917 if (!DECL_LANG_SPECIFIC (decl
))
918 retrofit_lang_decl (decl
);
919 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
920 if (DECL_LANG_SPECIFIC (t
))
921 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
923 DECL_DISCRIMINATOR (decl
) = 1;
925 VEC_replace (tree
, local_names
, i
, decl
);
926 timevar_stop (TV_NAME_LOOKUP
);
931 VEC_safe_push (tree
, gc
, local_names
, decl
);
932 timevar_stop (TV_NAME_LOOKUP
);
935 /* Subroutine of duplicate_decls: return truthvalue of whether
936 or not types of these decls match.
938 For C++, we must compare the parameter list so that `int' can match
939 `int&' in a parameter position, but `int&' is not confused with
943 decls_match (tree newdecl
, tree olddecl
)
947 if (newdecl
== olddecl
)
950 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
951 /* If the two DECLs are not even the same kind of thing, we're not
952 interested in their types. */
955 gcc_assert (DECL_P (newdecl
));
957 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
959 tree f1
= TREE_TYPE (newdecl
);
960 tree f2
= TREE_TYPE (olddecl
);
961 tree p1
= TYPE_ARG_TYPES (f1
);
962 tree p2
= TYPE_ARG_TYPES (f2
);
965 /* Specializations of different templates are different functions
966 even if they have the same type. */
967 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
968 ? DECL_TI_TEMPLATE (newdecl
)
970 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
971 ? DECL_TI_TEMPLATE (olddecl
)
976 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
977 && ! (DECL_EXTERN_C_P (newdecl
)
978 && DECL_EXTERN_C_P (olddecl
)))
981 #ifdef NO_IMPLICIT_EXTERN_C
982 /* A new declaration doesn't match a built-in one unless it
983 is also extern "C". */
984 if (DECL_IS_BUILTIN (olddecl
)
985 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
989 if (TREE_CODE (f1
) != TREE_CODE (f2
))
992 /* A declaration with deduced return type should use its pre-deduction
993 type for declaration matching. */
994 if (FNDECL_USED_AUTO (olddecl
))
995 r2
= DECL_STRUCT_FUNCTION (olddecl
)->language
->x_auto_return_pattern
;
999 if (same_type_p (TREE_TYPE (f1
), r2
))
1001 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1002 && (DECL_BUILT_IN (olddecl
)
1003 #ifndef NO_IMPLICIT_EXTERN_C
1004 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1005 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1009 types_match
= self_promoting_args_p (p1
);
1010 if (p1
== void_list_node
)
1011 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1013 #ifndef NO_IMPLICIT_EXTERN_C
1014 else if (!prototype_p (f1
)
1015 && (DECL_EXTERN_C_P (olddecl
)
1016 && DECL_IN_SYSTEM_HEADER (olddecl
)
1017 && !DECL_CLASS_SCOPE_P (olddecl
))
1018 && (DECL_EXTERN_C_P (newdecl
)
1019 && DECL_IN_SYSTEM_HEADER (newdecl
)
1020 && !DECL_CLASS_SCOPE_P (newdecl
)))
1022 types_match
= self_promoting_args_p (p2
);
1023 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1029 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1030 || comp_type_attributes (TREE_TYPE (newdecl
),
1031 TREE_TYPE (olddecl
)) != 0);
1036 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1038 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1039 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1042 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1043 DECL_TEMPLATE_PARMS (olddecl
)))
1046 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1047 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1048 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1050 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1051 DECL_TEMPLATE_RESULT (newdecl
));
1055 /* Need to check scope for variable declaration (VAR_DECL).
1056 For typedef (TYPE_DECL), scope is ignored. */
1057 if (TREE_CODE (newdecl
) == VAR_DECL
1058 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1060 Two declarations for an object with C language linkage
1061 with the same name (ignoring the namespace that qualify
1062 it) that appear in different namespace scopes refer to
1064 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1067 if (TREE_TYPE (newdecl
) == error_mark_node
)
1068 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1069 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1070 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1071 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1074 types_match
= comptypes (TREE_TYPE (newdecl
),
1075 TREE_TYPE (olddecl
),
1076 COMPARE_REDECLARATION
);
1082 /* If NEWDECL is `static' and an `extern' was seen previously,
1083 warn about it. OLDDECL is the previous declaration.
1085 Note that this does not apply to the C++ case of declaring
1086 a variable `extern const' and then later `const'.
1088 Don't complain about built-in functions, since they are beyond
1089 the user's control. */
1092 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1094 if (TREE_CODE (newdecl
) == TYPE_DECL
1095 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1096 || TREE_CODE (newdecl
) == CONST_DECL
1097 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1100 /* Don't get confused by static member functions; that's a different
1102 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1103 && DECL_STATIC_FUNCTION_P (newdecl
))
1106 /* If the old declaration was `static', or the new one isn't, then
1107 everything is OK. */
1108 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1111 /* It's OK to declare a builtin function as `static'. */
1112 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1113 && DECL_ARTIFICIAL (olddecl
))
1116 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1117 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1120 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1121 function templates. If their exception specifications do not
1122 match, issue a diagnostic. */
1125 check_redeclaration_exception_specification (tree new_decl
,
1130 tree new_exceptions
;
1131 tree old_exceptions
;
1133 new_type
= TREE_TYPE (new_decl
);
1134 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1135 old_type
= TREE_TYPE (old_decl
);
1136 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1140 If any declaration of a function has an exception-specification,
1141 all declarations, including the definition and an explicit
1142 specialization, of that function shall have an
1143 exception-specification with the same set of type-ids. */
1144 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1145 && ! DECL_IS_BUILTIN (old_decl
)
1147 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1149 error ("declaration of %qF has a different exception specifier",
1151 error ("from previous declaration %q+F", old_decl
);
1155 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1156 Otherwise issue diagnostics. */
1159 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1161 old_decl
= STRIP_TEMPLATE (old_decl
);
1162 new_decl
= STRIP_TEMPLATE (new_decl
);
1163 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1164 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1166 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1167 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1169 if (TREE_CODE (old_decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (old_decl
))
1171 /* Hide a built-in declaration. */
1172 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1173 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1176 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1177 error ("from previous declaration %q+D", old_decl
);
1181 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1182 && lookup_attribute ("gnu_inline", \
1183 DECL_ATTRIBUTES (fn)))
1185 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1186 If the redeclaration is invalid, a diagnostic is issued, and the
1187 error_mark_node is returned. Otherwise, OLDDECL is returned.
1189 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1192 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1195 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1197 unsigned olddecl_uid
= DECL_UID (olddecl
);
1198 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1199 int new_defines_function
= 0;
1200 tree new_template_info
;
1202 if (newdecl
== olddecl
)
1205 types_match
= decls_match (newdecl
, olddecl
);
1207 /* If either the type of the new decl or the type of the old decl is an
1208 error_mark_node, then that implies that we have already issued an
1209 error (earlier) for some bogus type specification, and in that case,
1210 it is rather pointless to harass the user with yet more error message
1211 about the same declaration, so just pretend the types match here. */
1212 if (TREE_TYPE (newdecl
) == error_mark_node
1213 || TREE_TYPE (olddecl
) == error_mark_node
)
1214 return error_mark_node
;
1216 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1217 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1219 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1220 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1221 && check_raw_literal_operator (olddecl
))
1222 error ("literal operator template %q+D conflicts with"
1223 " raw literal operator %qD", newdecl
, olddecl
);
1224 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1225 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1226 && check_raw_literal_operator (newdecl
))
1227 error ("raw literal operator %q+D conflicts with"
1228 " literal operator template %qD", newdecl
, olddecl
);
1231 if (DECL_P (olddecl
)
1232 && TREE_CODE (newdecl
) == FUNCTION_DECL
1233 && TREE_CODE (olddecl
) == FUNCTION_DECL
1234 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1236 if (DECL_DECLARED_INLINE_P (newdecl
)
1237 && DECL_UNINLINABLE (newdecl
)
1238 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1239 /* Already warned elsewhere. */;
1240 else if (DECL_DECLARED_INLINE_P (olddecl
)
1241 && DECL_UNINLINABLE (olddecl
)
1242 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1243 /* Already warned. */;
1244 else if (DECL_DECLARED_INLINE_P (newdecl
)
1245 && DECL_UNINLINABLE (olddecl
)
1246 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1248 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1250 warning (OPT_Wattributes
, "previous declaration of %q+D "
1251 "with attribute noinline", olddecl
);
1253 else if (DECL_DECLARED_INLINE_P (olddecl
)
1254 && DECL_UNINLINABLE (newdecl
)
1255 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1257 warning (OPT_Wattributes
, "function %q+D redeclared with "
1258 "attribute noinline", newdecl
);
1259 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1264 /* Check for redeclaration and other discrepancies. */
1265 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1266 && DECL_ARTIFICIAL (olddecl
))
1268 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1269 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1271 /* Avoid warnings redeclaring built-ins which have not been
1272 explicitly declared. */
1273 if (DECL_ANTICIPATED (olddecl
))
1276 /* If you declare a built-in or predefined function name as static,
1277 the old definition is overridden, but optionally warn this was a
1278 bad choice of name. */
1279 if (! TREE_PUBLIC (newdecl
))
1281 warning (OPT_Wshadow
,
1282 DECL_BUILT_IN (olddecl
)
1283 ? G_("shadowing built-in function %q#D")
1284 : G_("shadowing library function %q#D"), olddecl
);
1285 /* Discard the old built-in function. */
1288 /* If the built-in is not ansi, then programs can override
1289 it even globally without an error. */
1290 else if (! DECL_BUILT_IN (olddecl
))
1291 warning (0, "library function %q#D redeclared as non-function %q#D",
1295 error ("declaration of %q#D", newdecl
);
1296 error ("conflicts with built-in declaration %q#D",
1301 else if (!types_match
)
1303 /* Avoid warnings redeclaring built-ins which have not been
1304 explicitly declared. */
1305 if (DECL_ANTICIPATED (olddecl
))
1307 /* Deal with fileptr_type_node. FILE type is not known
1308 at the time we create the builtins. */
1311 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1312 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1314 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1317 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1319 tree t
= TREE_VALUE (t1
);
1321 if (TREE_CODE (t
) == POINTER_TYPE
1322 && TYPE_NAME (TREE_TYPE (t
))
1323 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1324 == get_identifier ("FILE")
1325 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1327 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1329 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1330 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1331 types_match
= decls_match (newdecl
, olddecl
);
1333 return duplicate_decls (newdecl
, olddecl
,
1335 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1338 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1341 else if ((DECL_EXTERN_C_P (newdecl
)
1342 && DECL_EXTERN_C_P (olddecl
))
1343 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1344 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1346 /* A near match; override the builtin. */
1348 if (TREE_PUBLIC (newdecl
))
1350 warning (0, "new declaration %q#D", newdecl
);
1351 warning (0, "ambiguates built-in declaration %q#D",
1355 warning (OPT_Wshadow
,
1356 DECL_BUILT_IN (olddecl
)
1357 ? G_("shadowing built-in function %q#D")
1358 : G_("shadowing library function %q#D"), olddecl
);
1361 /* Discard the old built-in function. */
1364 /* Replace the old RTL to avoid problems with inlining. */
1365 COPY_DECL_RTL (newdecl
, olddecl
);
1367 /* Even if the types match, prefer the new declarations type for
1368 built-ins which have not been explicitly declared, for
1369 exception lists, etc... */
1370 else if (DECL_IS_BUILTIN (olddecl
))
1372 tree type
= TREE_TYPE (newdecl
);
1373 tree attribs
= (*targetm
.merge_type_attributes
)
1374 (TREE_TYPE (olddecl
), type
);
1376 type
= cp_build_type_attribute_variant (type
, attribs
);
1377 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1380 /* If a function is explicitly declared "throw ()", propagate that to
1381 the corresponding builtin. */
1382 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1383 && DECL_ANTICIPATED (olddecl
)
1384 && TREE_NOTHROW (newdecl
)
1385 && !TREE_NOTHROW (olddecl
))
1387 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1388 tree tmpdecl
= builtin_decl_explicit (fncode
);
1389 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1390 TREE_NOTHROW (tmpdecl
) = 1;
1393 /* Whether or not the builtin can throw exceptions has no
1394 bearing on this declarator. */
1395 TREE_NOTHROW (olddecl
) = 0;
1397 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1399 /* If a builtin function is redeclared as `static', merge
1400 the declarations, but make the original one static. */
1401 DECL_THIS_STATIC (olddecl
) = 1;
1402 TREE_PUBLIC (olddecl
) = 0;
1404 /* Make the old declaration consistent with the new one so
1405 that all remnants of the builtin-ness of this function
1406 will be banished. */
1407 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1408 COPY_DECL_RTL (newdecl
, olddecl
);
1411 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1413 /* C++ Standard, 3.3, clause 4:
1414 "[Note: a namespace name or a class template name must be unique
1415 in its declarative region (7.3.2, clause 14). ]" */
1416 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1417 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1418 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1419 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1420 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1421 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1423 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1424 && TREE_CODE (newdecl
) != TYPE_DECL
)
1425 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1426 && TREE_CODE (olddecl
) != TYPE_DECL
))
1428 /* We do nothing special here, because C++ does such nasty
1429 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1430 get shadowed, and know that if we need to find a TYPE_DECL
1431 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1432 slot of the identifier. */
1436 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1437 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1438 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1439 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1443 error ("%q#D redeclared as different kind of symbol", newdecl
);
1444 if (TREE_CODE (olddecl
) == TREE_LIST
)
1445 olddecl
= TREE_VALUE (olddecl
);
1446 error ("previous declaration of %q+#D", olddecl
);
1448 return error_mark_node
;
1450 else if (!types_match
)
1452 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1453 /* These are certainly not duplicate declarations; they're
1454 from different scopes. */
1457 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1459 /* The name of a class template may not be declared to refer to
1460 any other template, class, function, object, namespace, value,
1461 or type in the same scope. */
1462 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1463 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1465 error ("declaration of template %q#D", newdecl
);
1466 error ("conflicts with previous declaration %q+#D", olddecl
);
1468 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1469 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1470 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1471 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1472 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1473 DECL_TEMPLATE_PARMS (olddecl
))
1474 /* Template functions can be disambiguated by
1476 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1477 TREE_TYPE (TREE_TYPE (olddecl
))))
1479 error ("new declaration %q#D", newdecl
);
1480 error ("ambiguates old declaration %q+#D", olddecl
);
1484 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1486 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1488 error ("declaration of C function %q#D conflicts with",
1490 error ("previous declaration %q+#D here", olddecl
);
1493 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1494 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1496 error ("new declaration %q#D", newdecl
);
1497 if (FNDECL_USED_AUTO (olddecl
))
1498 error_at (DECL_SOURCE_LOCATION (olddecl
), "ambiguates old "
1499 "declaration with deduced return type");
1501 error ("ambiguates old declaration %q+#D", olddecl
);
1502 return error_mark_node
;
1509 error ("conflicting declaration %q#D", newdecl
);
1510 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1511 return error_mark_node
;
1514 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1515 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1516 && (!DECL_TEMPLATE_INFO (newdecl
)
1517 || (DECL_TI_TEMPLATE (newdecl
)
1518 != DECL_TI_TEMPLATE (olddecl
))))
1519 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1520 && (!DECL_TEMPLATE_INFO (olddecl
)
1521 || (DECL_TI_TEMPLATE (olddecl
)
1522 != DECL_TI_TEMPLATE (newdecl
))))))
1523 /* It's OK to have a template specialization and a non-template
1524 with the same type, or to have specializations of two
1525 different templates with the same type. Note that if one is a
1526 specialization, and the other is an instantiation of the same
1527 template, that we do not exit at this point. That situation
1528 can occur if we instantiate a template class, and then
1529 specialize one of its methods. This situation is valid, but
1530 the declarations must be merged in the usual way. */
1532 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1533 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1534 && !DECL_USE_TEMPLATE (newdecl
))
1535 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1536 && !DECL_USE_TEMPLATE (olddecl
))))
1537 /* One of the declarations is a template instantiation, and the
1538 other is not a template at all. That's OK. */
1540 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1542 /* In [namespace.alias] we have:
1544 In a declarative region, a namespace-alias-definition can be
1545 used to redefine a namespace-alias declared in that declarative
1546 region to refer only to the namespace to which it already
1549 Therefore, if we encounter a second alias directive for the same
1550 alias, we can just ignore the second directive. */
1551 if (DECL_NAMESPACE_ALIAS (newdecl
)
1552 && (DECL_NAMESPACE_ALIAS (newdecl
)
1553 == DECL_NAMESPACE_ALIAS (olddecl
)))
1555 /* [namespace.alias]
1557 A namespace-name or namespace-alias shall not be declared as
1558 the name of any other entity in the same declarative region.
1559 A namespace-name defined at global scope shall not be
1560 declared as the name of any other entity in any global scope
1562 error ("declaration of namespace %qD conflicts with", newdecl
);
1563 error ("previous declaration of namespace %q+D here", olddecl
);
1564 return error_mark_node
;
1568 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1571 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1572 if (DECL_NAME (olddecl
) != NULL_TREE
)
1573 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1574 ? G_("%q+#D previously defined here")
1575 : G_("%q+#D previously declared here"), olddecl
);
1576 return error_mark_node
;
1578 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1579 && DECL_INITIAL (olddecl
) != NULL_TREE
1580 && !prototype_p (TREE_TYPE (olddecl
))
1581 && prototype_p (TREE_TYPE (newdecl
)))
1583 /* Prototype decl follows defn w/o prototype. */
1584 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1585 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1586 "follows non-prototype definition here");
1588 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1589 || TREE_CODE (olddecl
) == VAR_DECL
)
1590 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1593 If two declarations of the same function or object
1594 specify different linkage-specifications ..., the program
1595 is ill-formed.... Except for functions with C++ linkage,
1596 a function declaration without a linkage specification
1597 shall not precede the first linkage specification for
1598 that function. A function can be declared without a
1599 linkage specification after an explicit linkage
1600 specification has been seen; the linkage explicitly
1601 specified in the earlier declaration is not affected by
1602 such a function declaration.
1604 DR 563 raises the question why the restrictions on
1605 functions should not also apply to objects. Older
1606 versions of G++ silently ignore the linkage-specification
1614 which is clearly wrong. Therefore, we now treat objects
1616 if (current_lang_depth () == 0)
1618 /* There is no explicit linkage-specification, so we use
1619 the linkage from the previous declaration. */
1620 if (!DECL_LANG_SPECIFIC (newdecl
))
1621 retrofit_lang_decl (newdecl
);
1622 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1626 error ("previous declaration of %q+#D with %qL linkage",
1627 olddecl
, DECL_LANGUAGE (olddecl
));
1628 error ("conflicts with new declaration with %qL linkage",
1629 DECL_LANGUAGE (newdecl
));
1633 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1635 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1637 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1638 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1641 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1642 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1644 for (; t1
&& t1
!= void_list_node
;
1645 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1646 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1648 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1651 permerror (input_location
, "default argument given for parameter %d of %q#D",
1653 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1657 error ("default argument given for parameter %d of %q#D",
1659 error ("after previous specification in %q+#D",
1666 /* Do not merge an implicit typedef with an explicit one. In:
1670 typedef class A A __attribute__ ((foo));
1672 the attribute should apply only to the typedef. */
1673 if (TREE_CODE (olddecl
) == TYPE_DECL
1674 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1675 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1678 /* If new decl is `static' and an `extern' was seen previously,
1680 warn_extern_redeclared_static (newdecl
, olddecl
);
1682 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1683 return error_mark_node
;
1685 /* We have committed to returning 1 at this point. */
1686 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1688 /* Now that functions must hold information normally held
1689 by field decls, there is extra work to do so that
1690 declaration information does not get destroyed during
1692 if (DECL_VINDEX (olddecl
))
1693 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1694 if (DECL_CONTEXT (olddecl
))
1695 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1696 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1697 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1698 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1699 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1700 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1701 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1702 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1703 SET_OVERLOADED_OPERATOR_CODE
1704 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1705 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1707 /* Optionally warn about more than one declaration for the same
1708 name, but don't warn about a function declaration followed by a
1710 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1711 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1712 /* Don't warn about extern decl followed by definition. */
1713 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1714 /* Don't warn about friends, let add_friend take care of it. */
1715 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1716 /* Don't warn about declaration followed by specialization. */
1717 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1718 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1720 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1721 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1724 if (DECL_DELETED_FN (newdecl
))
1726 error ("deleted definition of %qD", newdecl
);
1727 error ("after previous declaration %q+D", olddecl
);
1729 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1732 /* Deal with C++: must preserve virtual function table size. */
1733 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1735 tree newtype
= TREE_TYPE (newdecl
);
1736 tree oldtype
= TREE_TYPE (olddecl
);
1738 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1739 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1740 CLASSTYPE_FRIEND_CLASSES (newtype
)
1741 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1743 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1746 /* Copy all the DECL_... slots specified in the new decl
1747 except for any that we copy here from the old type. */
1748 DECL_ATTRIBUTES (newdecl
)
1749 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1751 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1755 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1756 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1757 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1758 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1759 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1760 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1762 DECL_ATTRIBUTES (old_result
)
1763 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1765 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1767 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1768 && DECL_INITIAL (new_result
))
1770 if (DECL_INITIAL (old_result
))
1771 DECL_UNINLINABLE (old_result
) = 1;
1773 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1774 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1775 DECL_NOT_REALLY_EXTERN (old_result
)
1776 = DECL_NOT_REALLY_EXTERN (new_result
);
1777 DECL_INTERFACE_KNOWN (old_result
)
1778 = DECL_INTERFACE_KNOWN (new_result
);
1779 DECL_DECLARED_INLINE_P (old_result
)
1780 = DECL_DECLARED_INLINE_P (new_result
);
1781 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1782 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1787 DECL_DECLARED_INLINE_P (old_result
)
1788 |= DECL_DECLARED_INLINE_P (new_result
);
1789 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1790 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1791 check_redeclaration_exception_specification (newdecl
, olddecl
);
1795 /* If the new declaration is a definition, update the file and
1796 line information on the declaration, and also make
1797 the old declaration the same definition. */
1798 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1800 DECL_SOURCE_LOCATION (olddecl
)
1801 = DECL_SOURCE_LOCATION (old_result
)
1802 = DECL_SOURCE_LOCATION (newdecl
);
1803 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1804 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1807 DECL_ARGUMENTS (old_result
)
1808 = DECL_ARGUMENTS (new_result
);
1809 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1810 parm
= DECL_CHAIN (parm
))
1811 DECL_CONTEXT (parm
) = old_result
;
1820 /* Automatically handles default parameters. */
1821 tree oldtype
= TREE_TYPE (olddecl
);
1824 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1825 maybe_instantiate_noexcept (olddecl
);
1827 /* Merge the data types specified in the two decls. */
1828 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1830 /* If merge_types produces a non-typedef type, just use the old type. */
1831 if (TREE_CODE (newdecl
) == TYPE_DECL
1832 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1835 if (TREE_CODE (newdecl
) == VAR_DECL
)
1837 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1838 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1839 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1840 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1841 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1842 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1844 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1845 if (DECL_LANG_SPECIFIC (olddecl
)
1846 && CP_DECL_THREADPRIVATE_P (olddecl
))
1848 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1849 if (!DECL_LANG_SPECIFIC (newdecl
))
1850 retrofit_lang_decl (newdecl
);
1852 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1853 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1857 /* Do this after calling `merge_types' so that default
1858 parameters don't confuse us. */
1859 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1860 check_redeclaration_exception_specification (newdecl
, olddecl
);
1861 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1863 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1864 check_default_args (newdecl
);
1866 /* Lay the type out, unless already done. */
1867 if (! same_type_p (newtype
, oldtype
)
1868 && TREE_TYPE (newdecl
) != error_mark_node
1869 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1870 layout_type (TREE_TYPE (newdecl
));
1872 if ((TREE_CODE (newdecl
) == VAR_DECL
1873 || TREE_CODE (newdecl
) == PARM_DECL
1874 || TREE_CODE (newdecl
) == RESULT_DECL
1875 || TREE_CODE (newdecl
) == FIELD_DECL
1876 || TREE_CODE (newdecl
) == TYPE_DECL
)
1877 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1878 layout_decl (newdecl
, 0);
1880 /* Merge the type qualifiers. */
1881 if (TREE_READONLY (newdecl
))
1882 TREE_READONLY (olddecl
) = 1;
1883 if (TREE_THIS_VOLATILE (newdecl
))
1884 TREE_THIS_VOLATILE (olddecl
) = 1;
1885 if (TREE_NOTHROW (newdecl
))
1886 TREE_NOTHROW (olddecl
) = 1;
1888 /* Merge deprecatedness. */
1889 if (TREE_DEPRECATED (newdecl
))
1890 TREE_DEPRECATED (olddecl
) = 1;
1892 /* Preserve function specific target and optimization options */
1893 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1895 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1896 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1897 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1898 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1900 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1901 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1902 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1903 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1906 /* Merge the initialization information. */
1907 if (DECL_INITIAL (newdecl
) == NULL_TREE
1908 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1910 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1911 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1912 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1914 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1915 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1919 /* Merge the section attribute.
1920 We want to issue an error if the sections conflict but that must be
1921 done later in decl_attributes since we are called before attributes
1923 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1924 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1926 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1928 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1929 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1930 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1931 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1932 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1933 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1934 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1935 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1936 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1937 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1938 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1939 /* Keep the old RTL. */
1940 COPY_DECL_RTL (olddecl
, newdecl
);
1942 else if (TREE_CODE (newdecl
) == VAR_DECL
1943 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1945 /* Keep the old RTL. We cannot keep the old RTL if the old
1946 declaration was for an incomplete object and the new
1947 declaration is not since many attributes of the RTL will
1949 COPY_DECL_RTL (olddecl
, newdecl
);
1952 /* If cannot merge, then use the new type and qualifiers,
1953 and don't preserve the old rtl. */
1956 /* Clean out any memory we had of the old declaration. */
1957 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1959 TREE_VALUE (oldstatic
) = error_mark_node
;
1961 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1962 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1963 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1964 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1967 /* Merge the storage class information. */
1968 merge_weak (newdecl
, olddecl
);
1970 if (DECL_ONE_ONLY (olddecl
))
1971 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
1973 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1974 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1975 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1976 if (! DECL_EXTERNAL (olddecl
))
1977 DECL_EXTERNAL (newdecl
) = 0;
1979 new_template_info
= NULL_TREE
;
1980 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1982 bool new_redefines_gnu_inline
= false;
1984 if (new_defines_function
1985 && ((DECL_INTERFACE_KNOWN (olddecl
)
1986 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1987 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1988 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1989 == FUNCTION_DECL
))))
1993 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1994 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1996 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1999 if (!new_redefines_gnu_inline
)
2001 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2002 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2003 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2005 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2006 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2007 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2009 /* If the OLDDECL is an instantiation and/or specialization,
2010 then the NEWDECL must be too. But, it may not yet be marked
2011 as such if the caller has created NEWDECL, but has not yet
2012 figured out that it is a redeclaration. */
2013 if (!DECL_USE_TEMPLATE (newdecl
))
2014 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2016 /* Don't really know how much of the language-specific
2017 values we should copy from old to new. */
2018 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2019 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2020 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2021 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2023 if (LANG_DECL_HAS_MIN (newdecl
))
2025 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2026 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2027 if (DECL_TEMPLATE_INFO (newdecl
))
2028 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2029 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2031 /* Only functions have these fields. */
2032 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2033 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
2035 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2036 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2037 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2038 && DECL_HIDDEN_FRIEND_P (olddecl
)
2039 && newdecl_is_friend
);
2040 DECL_BEFRIENDING_CLASSES (newdecl
)
2041 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2042 DECL_BEFRIENDING_CLASSES (olddecl
));
2043 /* DECL_THUNKS is only valid for virtual functions,
2044 otherwise it is a DECL_FRIEND_CONTEXT. */
2045 if (DECL_VIRTUAL_P (newdecl
))
2046 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
2048 /* Only variables have this field. */
2049 else if (TREE_CODE (newdecl
) == VAR_DECL
2050 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2051 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2054 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2058 /* Merge parameter attributes. */
2059 tree oldarg
, newarg
;
2060 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2061 newarg
= DECL_ARGUMENTS(newdecl
);
2063 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2064 DECL_ATTRIBUTES (newarg
)
2065 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2066 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2069 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2070 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2072 /* If newdecl is not a specialization, then it is not a
2073 template-related function at all. And that means that we
2074 should have exited above, returning 0. */
2075 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2077 if (DECL_ODR_USED (olddecl
))
2078 /* From [temp.expl.spec]:
2080 If a template, a member template or the member of a class
2081 template is explicitly specialized then that
2082 specialization shall be declared before the first use of
2083 that specialization that would cause an implicit
2084 instantiation to take place, in every translation unit in
2085 which such a use occurs. */
2086 error ("explicit specialization of %qD after first use",
2089 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2091 /* Don't propagate visibility from the template to the
2092 specialization here. We'll do that in determine_visibility if
2094 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2096 /* [temp.expl.spec/14] We don't inline explicit specialization
2097 just because the primary template says so. */
2099 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2100 the always_inline attribute. */
2101 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2102 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2104 if (DECL_DECLARED_INLINE_P (newdecl
))
2105 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2107 DECL_ATTRIBUTES (newdecl
)
2108 = remove_attribute ("always_inline",
2109 DECL_ATTRIBUTES (newdecl
));
2112 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2114 /* Never inline re-defined extern inline functions.
2115 FIXME: this could be better handled by keeping both
2116 function as separate declarations. */
2117 DECL_UNINLINABLE (newdecl
) = 1;
2121 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2122 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2124 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2126 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2127 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2129 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2130 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2131 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2132 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2135 /* Preserve abstractness on cloned [cd]tors. */
2136 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2138 /* Update newdecl's parms to point at olddecl. */
2139 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2140 parm
= DECL_CHAIN (parm
))
2141 DECL_CONTEXT (parm
) = olddecl
;
2145 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2146 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2147 COPY_DECL_RTL (newdecl
, olddecl
);
2149 if (! types_match
|| new_defines_function
)
2151 /* These need to be copied so that the names are available.
2152 Note that if the types do match, we'll preserve inline
2153 info and other bits, but if not, we won't. */
2154 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2155 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2157 if (new_defines_function
)
2158 /* If defining a function declared with other language
2159 linkage, use the previously declared language linkage. */
2160 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2161 else if (types_match
)
2163 /* If redeclaring a builtin function, and not a definition,
2164 it stays built in. */
2165 if (DECL_BUILT_IN (olddecl
))
2167 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2168 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2169 /* If we're keeping the built-in definition, keep the rtl,
2170 regardless of declaration matches. */
2171 COPY_DECL_RTL (olddecl
, newdecl
);
2172 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2174 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2177 /* If a compatible prototype of these builtin functions
2178 is seen, assume the runtime implements it with the
2179 expected semantics. */
2180 case BUILT_IN_STPCPY
:
2181 if (builtin_decl_explicit_p (fncode
))
2182 set_builtin_decl_implicit_p (fncode
, true);
2190 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2191 /* Don't clear out the arguments if we're just redeclaring a
2193 if (DECL_ARGUMENTS (olddecl
))
2194 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2197 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2198 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2200 /* Now preserve various other info from the definition. */
2201 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2202 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2203 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2204 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2206 /* Warn about conflicting visibility specifications. */
2207 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2208 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2209 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2211 warning_at (input_location
, OPT_Wattributes
,
2212 "%q+D: visibility attribute ignored because it", newdecl
);
2213 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2214 "conflicts with previous declaration here");
2216 /* Choose the declaration which specified visibility. */
2217 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2219 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2220 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2222 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2223 so keep this behavior. */
2224 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2226 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2227 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2229 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2230 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2232 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2233 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2235 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2236 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2237 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2239 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2240 with that from NEWDECL below. */
2241 if (DECL_LANG_SPECIFIC (olddecl
))
2243 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2244 != DECL_LANG_SPECIFIC (newdecl
));
2245 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2248 /* Merge the USED information. */
2249 if (TREE_USED (olddecl
))
2250 TREE_USED (newdecl
) = 1;
2251 else if (TREE_USED (newdecl
))
2252 TREE_USED (olddecl
) = 1;
2253 if (TREE_CODE (newdecl
) == VAR_DECL
)
2255 if (DECL_READ_P (olddecl
))
2256 DECL_READ_P (newdecl
) = 1;
2257 else if (DECL_READ_P (newdecl
))
2258 DECL_READ_P (olddecl
) = 1;
2260 if (DECL_PRESERVE_P (olddecl
))
2261 DECL_PRESERVE_P (newdecl
) = 1;
2262 else if (DECL_PRESERVE_P (newdecl
))
2263 DECL_PRESERVE_P (olddecl
) = 1;
2265 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2269 function_size
= sizeof (struct tree_decl_common
);
2271 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2272 (char *) newdecl
+ sizeof (struct tree_common
),
2273 function_size
- sizeof (struct tree_common
));
2275 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2276 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2277 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2278 if (new_template_info
)
2279 /* If newdecl is a template instantiation, it is possible that
2280 the following sequence of events has occurred:
2282 o A friend function was declared in a class template. The
2283 class template was instantiated.
2285 o The instantiation of the friend declaration was
2286 recorded on the instantiation list, and is newdecl.
2288 o Later, however, instantiate_class_template called pushdecl
2289 on the newdecl to perform name injection. But, pushdecl in
2290 turn called duplicate_decls when it discovered that another
2291 declaration of a global function with the same name already
2294 o Here, in duplicate_decls, we decided to clobber newdecl.
2296 If we're going to do that, we'd better make sure that
2297 olddecl, and not newdecl, is on the list of
2298 instantiations so that if we try to do the instantiation
2299 again we won't get the clobbered declaration. */
2300 reregister_specialization (newdecl
,
2306 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2307 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2308 (char *) newdecl
+ sizeof (struct tree_common
),
2309 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2310 switch (TREE_CODE (olddecl
))
2320 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2321 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2322 size
- sizeof (struct tree_decl_common
)
2323 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2327 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2328 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2329 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2330 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2334 DECL_UID (olddecl
) = olddecl_uid
;
2336 DECL_FRIEND_P (olddecl
) = 1;
2339 DECL_ANTICIPATED (olddecl
) = 1;
2340 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2343 /* NEWDECL contains the merged attribute lists.
2344 Update OLDDECL to be the same. */
2345 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2347 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2348 so that encode_section_info has a chance to look at the new decl
2349 flags and attributes. */
2350 if (DECL_RTL_SET_P (olddecl
)
2351 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2352 || (TREE_CODE (olddecl
) == VAR_DECL
2353 && TREE_STATIC (olddecl
))))
2354 make_decl_rtl (olddecl
);
2356 /* The NEWDECL will no longer be needed. Because every out-of-class
2357 declaration of a member results in a call to duplicate_decls,
2358 freeing these nodes represents in a significant savings. */
2364 /* Return zero if the declaration NEWDECL is valid
2365 when the declaration OLDDECL (assumed to be for the same name)
2366 has already been seen.
2367 Otherwise return an error message format string with a %s
2368 where the identifier should go. */
2371 redeclaration_error_message (tree newdecl
, tree olddecl
)
2373 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2375 /* Because C++ can put things into name space for free,
2376 constructs like "typedef struct foo { ... } foo"
2377 would look like an erroneous redeclaration. */
2378 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2381 return G_("redefinition of %q#D");
2383 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2385 /* If this is a pure function, its olddecl will actually be
2386 the original initialization to `0' (which we force to call
2387 abort()). Don't complain about redefinition in this case. */
2388 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2389 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2392 /* If both functions come from different namespaces, this is not
2393 a redeclaration - this is a conflict with a used function. */
2394 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2395 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2396 && ! decls_match (olddecl
, newdecl
))
2397 return G_("%qD conflicts with used function");
2399 /* We'll complain about linkage mismatches in
2400 warn_extern_redeclared_static. */
2402 /* Defining the same name twice is no good. */
2403 if (DECL_INITIAL (olddecl
) != NULL_TREE
2404 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2406 if (DECL_NAME (olddecl
) == NULL_TREE
)
2407 return G_("%q#D not declared in class");
2408 else if (!GNU_INLINE_P (olddecl
)
2409 || GNU_INLINE_P (newdecl
))
2410 return G_("redefinition of %q#D");
2413 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2415 bool olda
= GNU_INLINE_P (olddecl
);
2416 bool newa
= GNU_INLINE_P (newdecl
);
2421 return G_("%q+D redeclared inline with "
2422 "%<gnu_inline%> attribute");
2424 return G_("%q+D redeclared inline without "
2425 "%<gnu_inline%> attribute");
2431 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2435 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2437 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2438 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2439 return G_("redefinition of %q#D");
2443 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2444 || (DECL_TEMPLATE_RESULT (newdecl
)
2445 == DECL_TEMPLATE_RESULT (olddecl
)))
2448 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2449 if (DECL_TEMPLATE_INFO (nt
))
2450 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2451 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2452 if (DECL_TEMPLATE_INFO (ot
))
2453 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2454 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2455 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2456 return G_("redefinition of %q#D");
2458 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2460 bool olda
= GNU_INLINE_P (ot
);
2461 bool newa
= GNU_INLINE_P (nt
);
2466 return G_("%q+D redeclared inline with "
2467 "%<gnu_inline%> attribute");
2469 return G_("%q+D redeclared inline without "
2470 "%<gnu_inline%> attribute");
2474 /* Core issue #226 (C++0x):
2476 If a friend function template declaration specifies a
2477 default template-argument, that declaration shall be a
2478 definition and shall be the only declaration of the
2479 function template in the translation unit. */
2480 if ((cxx_dialect
!= cxx98
)
2481 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2482 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2483 /*is_primary=*/1, /*is_partial=*/0,
2484 /*is_friend_decl=*/2))
2485 return G_("redeclaration of friend %q#D "
2486 "may not have default template arguments");
2490 else if (TREE_CODE (newdecl
) == VAR_DECL
2491 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2492 && (! DECL_LANG_SPECIFIC (olddecl
)
2493 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2494 || DECL_THREAD_LOCAL_P (newdecl
)))
2496 /* Only variables can be thread-local, and all declarations must
2497 agree on this property. */
2498 if (DECL_THREAD_LOCAL_P (newdecl
))
2499 return G_("thread-local declaration of %q#D follows "
2500 "non-thread-local declaration");
2502 return G_("non-thread-local declaration of %q#D follows "
2503 "thread-local declaration");
2505 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2507 /* The objects have been declared at namespace scope. If either
2508 is a member of an anonymous union, then this is an invalid
2509 redeclaration. For example:
2515 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2516 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2517 return G_("redeclaration of %q#D");
2518 /* If at least one declaration is a reference, there is no
2519 conflict. For example:
2525 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2527 /* Reject two definitions. */
2528 return G_("redefinition of %q#D");
2532 /* Objects declared with block scope: */
2533 /* Reject two definitions, and reject a definition
2534 together with an external reference. */
2535 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2536 return G_("redeclaration of %q#D");
2541 /* Hash and equality functions for the named_label table. */
2544 named_label_entry_hash (const void *data
)
2546 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2547 return DECL_UID (ent
->label_decl
);
2551 named_label_entry_eq (const void *a
, const void *b
)
2553 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2554 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2555 return ent_a
->label_decl
== ent_b
->label_decl
;
2558 /* Create a new label, named ID. */
2561 make_label_decl (tree id
, int local_p
)
2563 struct named_label_entry
*ent
;
2567 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2569 DECL_CONTEXT (decl
) = current_function_decl
;
2570 DECL_MODE (decl
) = VOIDmode
;
2571 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2573 /* Say where one reference is to the label, for the sake of the
2574 error if it is not defined. */
2575 DECL_SOURCE_LOCATION (decl
) = input_location
;
2577 /* Record the fact that this identifier is bound to this label. */
2578 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2580 /* Create the label htab for the function on demand. */
2582 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2583 named_label_entry_eq
, NULL
);
2585 /* Record this label on the list of labels used in this function.
2586 We do this before calling make_label_decl so that we get the
2587 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2588 ent
= ggc_alloc_cleared_named_label_entry ();
2589 ent
->label_decl
= decl
;
2591 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2592 gcc_assert (*slot
== NULL
);
2598 /* Look for a label named ID in the current function. If one cannot
2599 be found, create one. (We keep track of used, but undefined,
2600 labels, and complain about them at the end of a function.) */
2603 lookup_label_1 (tree id
)
2607 /* You can't use labels at global scope. */
2608 if (current_function_decl
== NULL_TREE
)
2610 error ("label %qE referenced outside of any function", id
);
2614 /* See if we've already got this label. */
2615 decl
= IDENTIFIER_LABEL_VALUE (id
);
2616 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2619 decl
= make_label_decl (id
, /*local_p=*/0);
2623 /* Wrapper for lookup_label_1. */
2626 lookup_label (tree id
)
2629 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2630 ret
= lookup_label_1 (id
);
2631 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2635 /* Declare a local label named ID. */
2638 declare_local_label (tree id
)
2641 cp_label_binding
*bind
;
2643 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2644 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2645 bind
= VEC_safe_push (cp_label_binding
, gc
,
2646 current_binding_level
->shadowed_labels
, NULL
);
2647 bind
->prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2649 decl
= make_label_decl (id
, /*local_p=*/1);
2655 /* Returns nonzero if it is ill-formed to jump past the declaration of
2656 DECL. Returns 2 if it's also a real problem. */
2659 decl_jump_unsafe (tree decl
)
2661 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2662 with automatic storage duration is not in scope to a point where it is
2663 in scope is ill-formed unless the variable has scalar type, class type
2664 with a trivial default constructor and a trivial destructor, a
2665 cv-qualified version of one of these types, or an array of one of the
2666 preceding types and is declared without an initializer (8.5). */
2667 tree type
= TREE_TYPE (decl
);
2669 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2670 || type
== error_mark_node
)
2673 type
= strip_array_types (type
);
2675 if (type_has_nontrivial_default_init (TREE_TYPE (decl
))
2676 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2679 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2685 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2688 identify_goto (tree decl
, const location_t
*locus
)
2691 permerror (input_location
, "jump to label %qD", decl
);
2693 permerror (input_location
, "jump to case label");
2695 permerror (*locus
, " from here");
2698 /* Check that a single previously seen jump to a newly defined label
2699 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2700 the jump context; NAMES are the names in scope in LEVEL at the jump
2701 context; LOCUS is the source position of the jump or 0. Returns
2702 true if all is well. */
2705 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2706 bool exited_omp
, const location_t
*locus
)
2708 cp_binding_level
*b
;
2709 bool identified
= false, saw_eh
= false, saw_omp
= false;
2713 identify_goto (decl
, locus
);
2714 error (" exits OpenMP structured block");
2715 identified
= saw_omp
= true;
2718 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2720 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2722 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2723 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2724 : TREE_CHAIN (new_decls
)))
2726 int problem
= decl_jump_unsafe (new_decls
);
2732 identify_goto (decl
, locus
);
2736 error (" crosses initialization of %q+#D", new_decls
);
2738 permerror (input_location
, " enters scope of %q+#D which has "
2739 "non-trivial destructor", new_decls
);
2744 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2748 identify_goto (decl
, locus
);
2751 if (b
->kind
== sk_try
)
2752 error (" enters try block");
2754 error (" enters catch block");
2757 if (b
->kind
== sk_omp
&& !saw_omp
)
2761 identify_goto (decl
, locus
);
2764 error (" enters OpenMP structured block");
2773 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2775 check_previous_goto_1 (decl
, use
->binding_level
,
2776 use
->names_in_scope
, use
->in_omp_scope
,
2777 &use
->o_goto_locus
);
2781 check_switch_goto (cp_binding_level
* level
)
2783 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2786 /* Check that a new jump to a label DECL is OK. Called by
2787 finish_goto_stmt. */
2790 check_goto (tree decl
)
2792 struct named_label_entry
*ent
, dummy
;
2793 bool saw_catch
= false, identified
= false;
2797 /* We can't know where a computed goto is jumping.
2798 So we assume that it's OK. */
2799 if (TREE_CODE (decl
) != LABEL_DECL
)
2802 /* We didn't record any information about this label when we created it,
2803 and there's not much point since it's trivial to analyze as a return. */
2804 if (decl
== cdtor_label
)
2807 dummy
.label_decl
= decl
;
2808 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2809 gcc_assert (ent
!= NULL
);
2811 /* If the label hasn't been defined yet, defer checking. */
2812 if (! DECL_INITIAL (decl
))
2814 struct named_label_use_entry
*new_use
;
2816 /* Don't bother creating another use if the last goto had the
2817 same data, and will therefore create the same set of errors. */
2819 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2822 new_use
= ggc_alloc_named_label_use_entry ();
2823 new_use
->binding_level
= current_binding_level
;
2824 new_use
->names_in_scope
= current_binding_level
->names
;
2825 new_use
->o_goto_locus
= input_location
;
2826 new_use
->in_omp_scope
= false;
2828 new_use
->next
= ent
->uses
;
2829 ent
->uses
= new_use
;
2833 if (ent
->in_try_scope
|| ent
->in_catch_scope
2834 || ent
->in_omp_scope
|| !VEC_empty (tree
, ent
->bad_decls
))
2836 permerror (input_location
, "jump to label %q+D", decl
);
2837 permerror (input_location
, " from here");
2841 FOR_EACH_VEC_ELT (tree
, ent
->bad_decls
, ix
, bad
)
2843 int u
= decl_jump_unsafe (bad
);
2845 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2847 /* Can't skip init of __exception_info. */
2848 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2852 error (" skips initialization of %q+#D", bad
);
2854 permerror (input_location
, " enters scope of %q+#D which has "
2855 "non-trivial destructor", bad
);
2858 if (ent
->in_try_scope
)
2859 error (" enters try block");
2860 else if (ent
->in_catch_scope
&& !saw_catch
)
2861 error (" enters catch block");
2863 if (ent
->in_omp_scope
)
2864 error (" enters OpenMP structured block");
2865 else if (flag_openmp
)
2867 cp_binding_level
*b
;
2868 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2870 if (b
== ent
->binding_level
)
2872 if (b
->kind
== sk_omp
)
2876 permerror (input_location
, "jump to label %q+D", decl
);
2877 permerror (input_location
, " from here");
2880 error (" exits OpenMP structured block");
2887 /* Check that a return is ok wrt OpenMP structured blocks.
2888 Called by finish_return_stmt. Returns true if all is well. */
2891 check_omp_return (void)
2893 cp_binding_level
*b
;
2894 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2895 if (b
->kind
== sk_omp
)
2897 error ("invalid exit from OpenMP structured block");
2900 else if (b
->kind
== sk_function_parms
)
2905 /* Define a label, specifying the location in the source file.
2906 Return the LABEL_DECL node for the label. */
2909 define_label_1 (location_t location
, tree name
)
2911 struct named_label_entry
*ent
, dummy
;
2912 cp_binding_level
*p
;
2915 decl
= lookup_label (name
);
2917 dummy
.label_decl
= decl
;
2918 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2919 gcc_assert (ent
!= NULL
);
2921 /* After labels, make any new cleanups in the function go into their
2922 own new (temporary) binding contour. */
2923 for (p
= current_binding_level
;
2924 p
->kind
!= sk_function_parms
;
2926 p
->more_cleanups_ok
= 0;
2928 if (name
== get_identifier ("wchar_t"))
2929 permerror (input_location
, "label named wchar_t");
2931 if (DECL_INITIAL (decl
) != NULL_TREE
)
2933 error ("duplicate label %qD", decl
);
2934 return error_mark_node
;
2938 struct named_label_use_entry
*use
;
2940 /* Mark label as having been defined. */
2941 DECL_INITIAL (decl
) = error_mark_node
;
2942 /* Say where in the source. */
2943 DECL_SOURCE_LOCATION (decl
) = location
;
2945 ent
->binding_level
= current_binding_level
;
2946 ent
->names_in_scope
= current_binding_level
->names
;
2948 for (use
= ent
->uses
; use
; use
= use
->next
)
2949 check_previous_goto (decl
, use
);
2956 /* Wrapper for define_label_1. */
2959 define_label (location_t location
, tree name
)
2962 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
2963 ret
= define_label_1 (location
, name
);
2964 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
2971 cp_binding_level
*level
;
2972 struct cp_switch
*next
;
2973 /* The SWITCH_STMT being built. */
2975 /* A splay-tree mapping the low element of a case range to the high
2976 element, or NULL_TREE if there is no high element. Used to
2977 determine whether or not a new case label duplicates an old case
2978 label. We need a tree, rather than simply a hash table, because
2979 of the GNU case range extension. */
2983 /* A stack of the currently active switch statements. The innermost
2984 switch statement is on the top of the stack. There is no need to
2985 mark the stack for garbage collection because it is only active
2986 during the processing of the body of a function, and we never
2987 collect at that point. */
2989 static struct cp_switch
*switch_stack
;
2991 /* Called right after a switch-statement condition is parsed.
2992 SWITCH_STMT is the switch statement being parsed. */
2995 push_switch (tree switch_stmt
)
2997 struct cp_switch
*p
= XNEW (struct cp_switch
);
2998 p
->level
= current_binding_level
;
2999 p
->next
= switch_stack
;
3000 p
->switch_stmt
= switch_stmt
;
3001 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3008 struct cp_switch
*cs
= switch_stack
;
3009 location_t switch_location
;
3011 /* Emit warnings as needed. */
3012 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3013 if (!processing_template_decl
)
3014 c_do_switch_warnings (cs
->cases
, switch_location
,
3015 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3016 SWITCH_STMT_COND (cs
->switch_stmt
));
3018 splay_tree_delete (cs
->cases
);
3019 switch_stack
= switch_stack
->next
;
3023 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3024 condition. Note that if TYPE and VALUE are already integral we don't
3025 really do the conversion because the language-independent
3026 warning/optimization code will work better that way. */
3029 case_conversion (tree type
, tree value
)
3031 if (value
== NULL_TREE
)
3034 if (cxx_dialect
>= cxx0x
3035 && (SCOPED_ENUM_P (type
)
3036 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3038 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3039 type
= type_promotes_to (type
);
3040 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3042 return cxx_constant_value (value
);
3045 /* Note that we've seen a definition of a case label, and complain if this
3046 is a bad place for one. */
3049 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3052 cp_binding_level
*p
;
3055 if (processing_template_decl
)
3059 /* For templates, just add the case label; we'll do semantic
3060 analysis at instantiation-time. */
3061 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3062 return add_stmt (build_case_label (low_value
, high_value
, label
));
3065 /* Find the condition on which this switch statement depends. */
3066 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3067 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3068 cond
= TREE_VALUE (cond
);
3070 if (!check_switch_goto (switch_stack
->level
))
3071 return error_mark_node
;
3073 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3075 low_value
= case_conversion (type
, low_value
);
3076 high_value
= case_conversion (type
, high_value
);
3078 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3079 low_value
, high_value
);
3081 /* After labels, make any new cleanups in the function go into their
3082 own new (temporary) binding contour. */
3083 for (p
= current_binding_level
;
3084 p
->kind
!= sk_function_parms
;
3086 p
->more_cleanups_ok
= 0;
3091 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3094 typename_hash (const void* k
)
3097 const_tree
const t
= (const_tree
) k
;
3099 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3100 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3105 typedef struct typename_info
{
3113 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3114 really of type `typename_info*' */
3117 typename_compare (const void * k1
, const void * k2
)
3119 const_tree
const t1
= (const_tree
) k1
;
3120 const typename_info
*const t2
= (const typename_info
*) k2
;
3122 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3123 && TYPE_CONTEXT (t1
) == t2
->scope
3124 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3125 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3126 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3129 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3130 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3132 Returns the new TYPENAME_TYPE. */
3134 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3137 build_typename_type (tree context
, tree name
, tree fullname
,
3138 enum tag_types tag_type
)
3146 if (typename_htab
== NULL
)
3147 typename_htab
= htab_create_ggc (61, &typename_hash
,
3148 &typename_compare
, NULL
);
3150 ti
.scope
= FROB_CONTEXT (context
);
3152 ti
.template_id
= fullname
;
3153 ti
.enum_p
= tag_type
== enum_type
;
3154 ti
.class_p
= (tag_type
== class_type
3155 || tag_type
== record_type
3156 || tag_type
== union_type
);
3157 hash
= (htab_hash_pointer (ti
.scope
)
3158 ^ htab_hash_pointer (ti
.name
));
3160 /* See if we already have this type. */
3161 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3166 /* Build the TYPENAME_TYPE. */
3167 t
= cxx_make_type (TYPENAME_TYPE
);
3168 TYPE_CONTEXT (t
) = ti
.scope
;
3169 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3170 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3171 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3173 /* Build the corresponding TYPE_DECL. */
3174 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3175 TYPE_NAME (TREE_TYPE (d
)) = d
;
3176 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3177 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3178 DECL_ARTIFICIAL (d
) = 1;
3180 /* Store it in the hash table. */
3183 /* TYPENAME_TYPEs must always be compared structurally, because
3184 they may or may not resolve down to another type depending on
3185 the currently open classes. */
3186 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3192 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3193 provided to name the type. Returns an appropriate type, unless an
3194 error occurs, in which case error_mark_node is returned. If we
3195 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3196 return that, rather than the _TYPE it corresponds to, in other
3197 cases we look through the type decl. If TF_ERROR is set, complain
3198 about errors, otherwise be quiet. */
3201 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3202 tsubst_flags_t complain
)
3208 if (name
== error_mark_node
3209 || context
== NULL_TREE
3210 || context
== error_mark_node
)
3211 return error_mark_node
;
3215 if (!(TYPE_LANG_SPECIFIC (name
)
3216 && (CLASSTYPE_IS_TEMPLATE (name
)
3217 || CLASSTYPE_USE_TEMPLATE (name
))))
3218 name
= TYPE_IDENTIFIER (name
);
3220 /* Create a TEMPLATE_ID_EXPR for the type. */
3221 name
= build_nt (TEMPLATE_ID_EXPR
,
3222 CLASSTYPE_TI_TEMPLATE (name
),
3223 CLASSTYPE_TI_ARGS (name
));
3225 else if (TREE_CODE (name
) == TYPE_DECL
)
3226 name
= DECL_NAME (name
);
3230 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3232 name
= TREE_OPERAND (name
, 0);
3233 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3234 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3235 else if (TREE_CODE (name
) == OVERLOAD
)
3237 error ("%qD is not a type", name
);
3238 return error_mark_node
;
3241 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3243 error ("%qD used without template parameters", name
);
3244 return error_mark_node
;
3246 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3247 gcc_assert (TYPE_P (context
));
3249 if (!MAYBE_CLASS_TYPE_P (context
))
3251 if (complain
& tf_error
)
3252 error ("%q#T is not a class", context
);
3253 return error_mark_node
;
3256 /* When the CONTEXT is a dependent type, NAME could refer to a
3257 dependent base class of CONTEXT. But look inside it anyway
3258 if CONTEXT is a currently open scope, in case it refers to a
3259 member of the current instantiation or a non-dependent base;
3260 lookup will stop when we hit a dependent base. */
3261 if (!dependent_scope_p (context
))
3262 /* We should only set WANT_TYPE when we're a nested typename type.
3263 Then we can give better diagnostics if we find a non-type. */
3264 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3268 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3269 return build_typename_type (context
, name
, fullname
, tag_type
);
3271 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3275 if (complain
& tf_error
)
3276 error (want_template
? G_("no class template named %q#T in %q#T")
3277 : G_("no type named %q#T in %q#T"), name
, context
);
3278 return error_mark_node
;
3281 /* Pull out the template from an injected-class-name (or multiple). */
3283 t
= maybe_get_template_decl_from_type_decl (t
);
3285 if (TREE_CODE (t
) == TREE_LIST
)
3287 if (complain
& tf_error
)
3289 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3290 print_candidates (t
);
3292 return error_mark_node
;
3295 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3297 if (complain
& tf_error
)
3298 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3300 return error_mark_node
;
3302 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3304 if (complain
& tf_error
)
3305 error ("%<typename %T::%D%> names %q#T, which is not a type",
3307 return error_mark_node
;
3310 if (complain
& tf_error
)
3311 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3313 /* If we are currently parsing a template and if T is a typedef accessed
3314 through CONTEXT then we need to remember and check access of T at
3315 template instantiation time. */
3316 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3319 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3321 /*entering_scope=*/0,
3322 tf_warning_or_error
| tf_user
);
3324 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3330 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3331 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3332 in which case error_mark_node is returned.
3334 If PARM_LIST is non-NULL, also make sure that the template parameter
3335 list of TEMPLATE_DECL matches.
3337 If COMPLAIN zero, don't complain about any errors that occur. */
3340 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3341 tsubst_flags_t complain
)
3347 name
= TYPE_IDENTIFIER (name
);
3348 else if (DECL_P (name
))
3349 name
= DECL_NAME (name
);
3350 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3352 if (!dependent_type_p (context
)
3353 || currently_open_class (context
))
3355 tree tmpl
= NULL_TREE
;
3357 if (MAYBE_CLASS_TYPE_P (context
))
3358 tmpl
= lookup_field (context
, name
, 0, false);
3360 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3361 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3363 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3365 if (complain
& tf_error
)
3366 error ("no class template named %q#T in %q#T", name
, context
);
3367 return error_mark_node
;
3371 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3373 if (complain
& tf_error
)
3375 error ("template parameters do not match template");
3376 error ("%q+D declared here", tmpl
);
3378 return error_mark_node
;
3381 if (complain
& tf_error
)
3382 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3387 /* Build the UNBOUND_CLASS_TEMPLATE. */
3388 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3389 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3390 TREE_TYPE (t
) = NULL_TREE
;
3391 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3393 /* Build the corresponding TEMPLATE_DECL. */
3394 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3395 TYPE_NAME (TREE_TYPE (d
)) = d
;
3396 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3397 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3398 DECL_ARTIFICIAL (d
) = 1;
3399 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3406 /* Push the declarations of builtin types into the namespace.
3407 RID_INDEX is the index of the builtin type in the array
3408 RID_POINTERS. NAME is the name used when looking up the builtin
3409 type. TYPE is the _TYPE node for the builtin type. */
3412 record_builtin_type (enum rid rid_index
,
3416 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3417 tree tdecl
= NULL_TREE
;
3419 if ((int) rid_index
< (int) RID_MAX
)
3420 rname
= ridpointers
[(int) rid_index
];
3422 tname
= get_identifier (name
);
3424 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3425 eliminated. Built-in types should not be looked up name; their
3426 names are keywords that the parser can recognize. However, there
3427 is code in c-common.c that uses identifier_global_value to look
3428 up built-in types by name. */
3431 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3432 DECL_ARTIFICIAL (tdecl
) = 1;
3433 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3439 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3440 DECL_ARTIFICIAL (tdecl
) = 1;
3442 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3445 if (!TYPE_NAME (type
))
3446 TYPE_NAME (type
) = tdecl
;
3449 debug_hooks
->type_decl (tdecl
, 0);
3452 /* Record one of the standard Java types.
3453 * Declare it as having the given NAME.
3454 * If SIZE > 0, it is the size of one of the integral types;
3455 * otherwise it is the negative of the size of one of the other types. */
3458 record_builtin_java_type (const char* name
, int size
)
3463 type
= build_nonstandard_integer_type (size
, 0);
3464 type
= build_distinct_type_copy (type
);
3466 else if (size
> -32)
3469 /* "__java_char" or ""__java_boolean". */
3470 type
= build_nonstandard_integer_type (-size
, 1);
3471 type
= build_distinct_type_copy (type
);
3472 /* Get the signed type cached and attached to the unsigned type,
3473 so it doesn't get garbage-collected at "random" times,
3474 causing potential codegen differences out of different UIDs
3475 and different alias set numbers. */
3476 stype
= build_nonstandard_integer_type (-size
, 0);
3477 stype
= build_distinct_type_copy (stype
);
3478 TREE_CHAIN (type
) = stype
;
3479 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3482 { /* "__java_float" or ""__java_double". */
3483 type
= make_node (REAL_TYPE
);
3484 TYPE_PRECISION (type
) = - size
;
3487 record_builtin_type (RID_MAX
, name
, type
);
3488 decl
= TYPE_NAME (type
);
3490 /* Suppress generate debug symbol entries for these types,
3491 since for normal C++ they are just clutter.
3492 However, push_lang_context undoes this if extern "Java" is seen. */
3493 DECL_IGNORED_P (decl
) = 1;
3495 TYPE_FOR_JAVA (type
) = 1;
3499 /* Push a type into the namespace so that the back ends ignore it. */
3502 record_unknown_type (tree type
, const char* name
)
3504 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3505 TYPE_DECL
, get_identifier (name
), type
));
3506 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3507 DECL_IGNORED_P (decl
) = 1;
3508 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3509 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3510 TYPE_ALIGN (type
) = 1;
3511 TYPE_USER_ALIGN (type
) = 0;
3512 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3515 /* A string for which we should create an IDENTIFIER_NODE at
3518 typedef struct predefined_identifier
3520 /* The name of the identifier. */
3521 const char *const name
;
3522 /* The place where the IDENTIFIER_NODE should be stored. */
3524 /* Nonzero if this is the name of a constructor or destructor. */
3525 const int ctor_or_dtor_p
;
3526 } predefined_identifier
;
3528 /* Create all the predefined identifiers. */
3531 initialize_predefined_identifiers (void)
3533 const predefined_identifier
*pid
;
3535 /* A table of identifiers to create at startup. */
3536 static const predefined_identifier predefined_identifiers
[] = {
3537 { "C++", &lang_name_cplusplus
, 0 },
3538 { "C", &lang_name_c
, 0 },
3539 { "Java", &lang_name_java
, 0 },
3540 /* Some of these names have a trailing space so that it is
3541 impossible for them to conflict with names written by users. */
3542 { "__ct ", &ctor_identifier
, 1 },
3543 { "__base_ctor ", &base_ctor_identifier
, 1 },
3544 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3545 { "__dt ", &dtor_identifier
, 1 },
3546 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3547 { "__base_dtor ", &base_dtor_identifier
, 1 },
3548 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3549 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3550 { "nelts", &nelts_identifier
, 0 },
3551 { THIS_NAME
, &this_identifier
, 0 },
3552 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3553 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3554 { "_vptr", &vptr_identifier
, 0 },
3555 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3556 { "::", &global_scope_name
, 0 },
3557 { "std", &std_identifier
, 0 },
3561 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3563 *pid
->node
= get_identifier (pid
->name
);
3564 if (pid
->ctor_or_dtor_p
)
3565 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3569 /* Create the predefined scalar types of C,
3570 and some nodes representing standard constants (0, 1, (void *)0).
3571 Initialize the global binding level.
3572 Make definitions for built-in primitive functions. */
3575 cxx_init_decl_processing (void)
3578 tree void_ftype_ptr
;
3580 /* Create all the identifiers we need. */
3581 initialize_predefined_identifiers ();
3583 /* Create the global variables. */
3584 push_to_top_level ();
3586 current_function_decl
= NULL_TREE
;
3587 current_binding_level
= NULL
;
3588 /* Enter the global namespace. */
3589 gcc_assert (global_namespace
== NULL_TREE
);
3590 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3592 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3593 TREE_PUBLIC (global_namespace
) = 1;
3594 begin_scope (sk_namespace
, global_namespace
);
3596 if (flag_visibility_ms_compat
)
3597 default_visibility
= VISIBILITY_HIDDEN
;
3600 current_lang_name
= lang_name_c
;
3602 /* Create the `std' namespace. */
3603 push_namespace (std_identifier
);
3604 std_node
= current_namespace
;
3607 c_common_nodes_and_builtins ();
3609 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3610 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3611 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3612 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3613 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3614 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3615 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3616 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3618 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3620 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3621 truthvalue_type_node
= boolean_type_node
;
3622 truthvalue_false_node
= boolean_false_node
;
3623 truthvalue_true_node
= boolean_true_node
;
3625 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3626 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3627 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3630 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3633 delta_type_node
= ptrdiff_type_node
;
3634 vtable_index_type
= ptrdiff_type_node
;
3636 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3637 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3638 void_ftype_ptr
= build_function_type_list (void_type_node
,
3639 ptr_type_node
, NULL_TREE
);
3641 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3643 /* C++ extensions */
3645 unknown_type_node
= make_node (LANG_TYPE
);
3646 record_unknown_type (unknown_type_node
, "unknown type");
3648 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3649 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3651 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3653 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3654 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3656 init_list_type_node
= make_node (LANG_TYPE
);
3657 record_unknown_type (init_list_type_node
, "init list");
3660 /* Make sure we get a unique function type, so we can give
3661 its pointer type a name. (This wins for gdb.) */
3662 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3663 TREE_TYPE (vfunc_type
) = integer_type_node
;
3664 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3665 layout_type (vfunc_type
);
3667 vtable_entry_type
= build_pointer_type (vfunc_type
);
3669 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3672 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3673 layout_type (vtbl_type_node
);
3674 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3675 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3676 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3677 layout_type (vtbl_ptr_type_node
);
3678 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3680 push_namespace (get_identifier ("__cxxabiv1"));
3681 abi_node
= current_namespace
;
3684 global_type_node
= make_node (LANG_TYPE
);
3685 record_unknown_type (global_type_node
, "global type");
3688 current_lang_name
= lang_name_cplusplus
;
3691 tree newattrs
, extvisattr
;
3692 tree newtype
, deltype
;
3693 tree ptr_ftype_sizetype
;
3697 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3698 if (cxx_dialect
== cxx98
)
3701 tree bad_alloc_type_node
;
3702 tree bad_alloc_decl
;
3704 push_namespace (std_identifier
);
3705 bad_alloc_id
= get_identifier ("bad_alloc");
3706 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3707 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3709 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3710 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3714 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3717 new_eh_spec
= noexcept_false_spec
;
3719 /* Ensure attribs.c is initialized. */
3721 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3723 newattrs
= tree_cons (get_identifier ("alloc_size"),
3724 build_tree_list (NULL_TREE
, integer_one_node
),
3726 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3727 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3728 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3729 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3730 push_cp_library_fn (NEW_EXPR
, newtype
);
3731 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3732 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3733 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3735 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3736 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3737 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3738 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3739 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3740 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3741 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3742 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3746 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3748 /* Perform other language dependent initializations. */
3749 init_class_processing ();
3750 init_rtti_processing ();
3751 init_template_processing ();
3753 if (flag_exceptions
)
3754 init_exception_processing ();
3756 if (! supports_one_only ())
3759 make_fname_decl
= cp_make_fname_decl
;
3760 start_fname_decls ();
3762 /* Show we use EH for cleanups. */
3763 if (flag_exceptions
)
3764 using_eh_for_cleanups ();
3767 /* Generate an initializer for a function naming variable from
3768 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3769 filled in with the type of the init. */
3772 cp_fname_init (const char* name
, tree
*type_p
)
3774 tree domain
= NULL_TREE
;
3776 tree init
= NULL_TREE
;
3781 length
= strlen (name
);
3782 domain
= build_index_type (size_int (length
));
3783 init
= build_string (length
+ 1, name
);
3786 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3787 type
= build_cplus_array_type (type
, domain
);
3792 TREE_TYPE (init
) = type
;
3794 init
= error_mark_node
;
3799 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3800 the decl, LOC is the location to give the decl, NAME is the
3801 initialization string and TYPE_DEP indicates whether NAME depended
3802 on the type of the function. We make use of that to detect
3803 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3804 at the point of first use, so we mustn't push the decl now. */
3807 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3809 const char *const name
= (type_dep
&& processing_template_decl
3810 ? NULL
: fname_as_string (type_dep
));
3812 tree init
= cp_fname_init (name
, &type
);
3813 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3816 free (CONST_CAST (char *, name
));
3818 /* As we're using pushdecl_with_scope, we must set the context. */
3819 DECL_CONTEXT (decl
) = current_function_decl
;
3820 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3822 TREE_STATIC (decl
) = 1;
3823 TREE_READONLY (decl
) = 1;
3824 DECL_ARTIFICIAL (decl
) = 1;
3826 TREE_USED (decl
) = 1;
3828 if (current_function_decl
)
3830 cp_binding_level
*b
= current_binding_level
;
3831 if (b
->kind
== sk_function_parms
)
3832 return error_mark_node
;
3833 while (b
->level_chain
->kind
!= sk_function_parms
)
3835 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3836 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3837 LOOKUP_ONLYCONVERTING
);
3841 DECL_THIS_STATIC (decl
) = true;
3842 pushdecl_top_level_and_finish (decl
, init
);
3849 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3851 tree id
= DECL_NAME (decl
);
3852 const char *name
= IDENTIFIER_POINTER (id
);
3854 retrofit_lang_decl (decl
);
3856 DECL_ARTIFICIAL (decl
) = 1;
3857 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3858 SET_DECL_LANGUAGE (decl
, lang_c
);
3859 /* Runtime library routines are, by definition, available in an
3860 external shared object. */
3861 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3862 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3864 DECL_CONTEXT (decl
) = context
;
3867 pushdecl_top_level (decl
);
3871 /* A function in the user's namespace should have an explicit
3872 declaration before it is used. Mark the built-in function as
3873 anticipated but not actually declared. */
3874 if (name
[0] != '_' || name
[1] != '_')
3875 DECL_ANTICIPATED (decl
) = 1;
3876 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3878 size_t len
= strlen (name
);
3880 /* Treat __*_chk fortification functions as anticipated as well,
3881 unless they are __builtin_*. */
3882 if (len
> strlen ("___chk")
3883 && memcmp (name
+ len
- strlen ("_chk"),
3884 "_chk", strlen ("_chk") + 1) == 0)
3885 DECL_ANTICIPATED (decl
) = 1;
3892 cxx_builtin_function (tree decl
)
3894 tree id
= DECL_NAME (decl
);
3895 const char *name
= IDENTIFIER_POINTER (id
);
3896 /* All builtins that don't begin with an '_' should additionally
3897 go in the 'std' namespace. */
3900 tree decl2
= copy_node(decl
);
3901 push_namespace (std_identifier
);
3902 builtin_function_1 (decl2
, std_node
, false);
3906 return builtin_function_1 (decl
, NULL_TREE
, false);
3909 /* Like cxx_builtin_function, but guarantee the function is added to the global
3910 scope. This is to allow function specific options to add new machine
3911 dependent builtins when the target ISA changes via attribute((target(...)))
3912 which saves space on program startup if the program does not use non-generic
3916 cxx_builtin_function_ext_scope (tree decl
)
3919 tree id
= DECL_NAME (decl
);
3920 const char *name
= IDENTIFIER_POINTER (id
);
3921 /* All builtins that don't begin with an '_' should additionally
3922 go in the 'std' namespace. */
3925 tree decl2
= copy_node(decl
);
3926 push_namespace (std_identifier
);
3927 builtin_function_1 (decl2
, std_node
, true);
3931 return builtin_function_1 (decl
, NULL_TREE
, true);
3934 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3935 function. Not called directly. */
3938 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3940 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3941 DECL_EXTERNAL (fn
) = 1;
3942 TREE_PUBLIC (fn
) = 1;
3943 DECL_ARTIFICIAL (fn
) = 1;
3944 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3945 SET_DECL_LANGUAGE (fn
, lang_c
);
3946 /* Runtime library routines are, by definition, available in an
3947 external shared object. */
3948 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3949 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3953 /* Returns the _DECL for a library function with C linkage.
3954 We assume that such functions never throw; if this is incorrect,
3955 callers should unset TREE_NOTHROW. */
3958 build_library_fn (tree name
, tree type
)
3960 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3961 TREE_NOTHROW (fn
) = 1;
3965 /* Returns the _DECL for a library function with C++ linkage. */
3968 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3970 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3971 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3972 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3973 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3977 /* Like build_library_fn, but takes a C string instead of an
3981 build_library_fn_ptr (const char* name
, tree type
)
3983 return build_library_fn (get_identifier (name
), type
);
3986 /* Like build_cp_library_fn, but takes a C string instead of an
3990 build_cp_library_fn_ptr (const char* name
, tree type
)
3992 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3995 /* Like build_library_fn, but also pushes the function so that we will
3996 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3997 may throw exceptions listed in RAISES. */
4000 push_library_fn (tree name
, tree type
, tree raises
)
4005 type
= build_exception_variant (type
, raises
);
4007 fn
= build_library_fn (name
, type
);
4008 pushdecl_top_level (fn
);
4012 /* Like build_cp_library_fn, but also pushes the function so that it
4013 will be found by normal lookup. */
4016 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4018 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4023 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4027 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4031 push_void_library_fn (tree name
, tree parmtypes
)
4033 tree type
= build_function_type (void_type_node
, parmtypes
);
4034 return push_library_fn (name
, type
, NULL_TREE
);
4037 /* Like push_library_fn, but also note that this function throws
4038 and does not return. Used for __throw_foo and the like. */
4041 push_throw_library_fn (tree name
, tree type
)
4043 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4044 TREE_THIS_VOLATILE (fn
) = 1;
4045 TREE_NOTHROW (fn
) = 0;
4049 /* When we call finish_struct for an anonymous union, we create
4050 default copy constructors and such. But, an anonymous union
4051 shouldn't have such things; this function undoes the damage to the
4052 anonymous union type T.
4054 (The reason that we create the synthesized methods is that we don't
4055 distinguish `union { int i; }' from `typedef union { int i; } U'.
4056 The first is an anonymous union; the second is just an ordinary
4060 fixup_anonymous_aggr (tree t
)
4064 /* Wipe out memory of synthesized methods. */
4065 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4066 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4067 TYPE_HAS_COPY_CTOR (t
) = 0;
4068 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4069 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4070 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4072 /* Splice the implicitly generated functions out of the TYPE_METHODS
4074 q
= &TYPE_METHODS (t
);
4077 if (DECL_ARTIFICIAL (*q
))
4078 *q
= TREE_CHAIN (*q
);
4080 q
= &DECL_CHAIN (*q
);
4083 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4084 if (TYPE_METHODS (t
))
4086 tree decl
= TYPE_MAIN_DECL (t
);
4088 if (TREE_CODE (t
) != UNION_TYPE
)
4089 error_at (DECL_SOURCE_LOCATION (decl
),
4090 "an anonymous struct cannot have function members");
4092 error_at (DECL_SOURCE_LOCATION (decl
),
4093 "an anonymous union cannot have function members");
4096 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4097 assignment operators (because they cannot have these methods themselves).
4098 For anonymous unions this is already checked because they are not allowed
4099 in any union, otherwise we have to check it. */
4100 if (TREE_CODE (t
) != UNION_TYPE
)
4104 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4105 if (TREE_CODE (field
) == FIELD_DECL
)
4107 type
= TREE_TYPE (field
);
4108 if (CLASS_TYPE_P (type
))
4110 if (TYPE_NEEDS_CONSTRUCTING (type
))
4111 error ("member %q+#D with constructor not allowed "
4112 "in anonymous aggregate", field
);
4113 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4114 error ("member %q+#D with destructor not allowed "
4115 "in anonymous aggregate", field
);
4116 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4117 error ("member %q+#D with copy assignment operator "
4118 "not allowed in anonymous aggregate", field
);
4124 /* Make sure that a declaration with no declarator is well-formed, i.e.
4125 just declares a tagged type or anonymous union.
4127 Returns the type declared; or NULL_TREE if none. */
4130 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
4132 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
4133 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
4134 /* If a class, struct, or enum type is declared by the DECLSPECS
4135 (i.e, if a class-specifier, enum-specifier, or non-typename
4136 elaborated-type-specifier appears in the DECLSPECS),
4137 DECLARED_TYPE is set to the corresponding type. */
4138 tree declared_type
= NULL_TREE
;
4139 bool error_p
= false;
4141 if (declspecs
->multiple_types_p
)
4142 error ("multiple types in one declaration");
4143 else if (declspecs
->redefined_builtin_type
)
4145 if (!in_system_header
)
4146 permerror (input_location
, "redeclaration of C++ built-in type %qT",
4147 declspecs
->redefined_builtin_type
);
4152 && TYPE_P (declspecs
->type
)
4153 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4154 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4155 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4156 declared_type
= declspecs
->type
;
4157 else if (declspecs
->type
== error_mark_node
)
4159 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4160 permerror (input_location
, "declaration does not declare anything");
4161 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4163 error ("%<auto%> can only be specified for variables "
4164 "or function declarations");
4165 return error_mark_node
;
4167 /* Check for an anonymous union. */
4168 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4169 && TYPE_ANONYMOUS_P (declared_type
))
4171 /* 7/3 In a simple-declaration, the optional init-declarator-list
4172 can be omitted only when declaring a class (clause 9) or
4173 enumeration (7.2), that is, when the decl-specifier-seq contains
4174 either a class-specifier, an elaborated-type-specifier with
4175 a class-key (9.1), or an enum-specifier. In these cases and
4176 whenever a class-specifier or enum-specifier is present in the
4177 decl-specifier-seq, the identifiers in these specifiers are among
4178 the names being declared by the declaration (as class-name,
4179 enum-names, or enumerators, depending on the syntax). In such
4180 cases, and except for the declaration of an unnamed bit-field (9.6),
4181 the decl-specifier-seq shall introduce one or more names into the
4182 program, or shall redeclare a name introduced by a previous
4183 declaration. [Example:
4184 enum { }; // ill-formed
4185 typedef class { }; // ill-formed
4189 error ("missing type-name in typedef-declaration");
4192 /* Anonymous unions are objects, so they can have specifiers. */;
4193 SET_ANON_AGGR_TYPE_P (declared_type
);
4195 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4196 pedwarn (input_location
, OPT_pedantic
, "ISO C++ prohibits anonymous structs");
4201 if (declspecs
->specs
[(int)ds_inline
]
4202 || declspecs
->specs
[(int)ds_virtual
])
4203 error ("%qs can only be specified for functions",
4204 declspecs
->specs
[(int)ds_inline
]
4205 ? "inline" : "virtual");
4207 && (!current_class_type
4208 || current_scope () != current_class_type
))
4209 error ("%<friend%> can only be specified inside a class");
4210 else if (declspecs
->specs
[(int)ds_explicit
])
4211 error ("%<explicit%> can only be specified for constructors");
4212 else if (declspecs
->storage_class
)
4213 error ("a storage class can only be specified for objects "
4215 else if (declspecs
->specs
[(int)ds_const
]
4216 || declspecs
->specs
[(int)ds_volatile
]
4217 || declspecs
->specs
[(int)ds_restrict
]
4218 || declspecs
->specs
[(int)ds_thread
])
4219 error ("qualifiers can only be specified for objects "
4221 else if (saw_typedef
)
4222 warning (0, "%<typedef%> was ignored in this declaration");
4223 else if (declspecs
->specs
[(int) ds_constexpr
])
4224 error ("%<constexpr%> cannot be used for type declarations");
4227 if (declspecs
->attributes
&& warn_attributes
)
4230 if (!CLASS_TYPE_P (declared_type
)
4231 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4232 /* For a non-template class, use the name location. */
4233 loc
= location_of (declared_type
);
4235 /* For a template class (an explicit instantiation), use the
4236 current location. */
4237 loc
= input_location
;
4238 warning_at (loc
, OPT_Wattributes
, "attribute ignored in declaration "
4239 "of %q#T", declared_type
);
4240 inform (loc
, "attribute for %q#T must follow the %qs keyword",
4241 declared_type
, class_key_or_enum_as_string (declared_type
));
4244 return declared_type
;
4247 /* Called when a declaration is seen that contains no names to declare.
4248 If its type is a reference to a structure, union or enum inherited
4249 from a containing scope, shadow that tag name for the current scope
4250 with a forward reference.
4251 If its type defines a new named structure or union
4252 or defines an enum, it is valid but we need not do anything here.
4253 Otherwise, it is an error.
4255 C++: may have to grok the declspecs to learn about static,
4256 complain for anonymous unions.
4258 Returns the TYPE declared -- or NULL_TREE if none. */
4261 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4263 tree t
= check_tag_decl (declspecs
);
4268 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4271 /* This is where the variables in an anonymous union are
4272 declared. An anonymous union declaration looks like:
4274 because there is no declarator after the union, the parser
4275 sends that declaration here. */
4276 if (ANON_AGGR_TYPE_P (t
))
4278 fixup_anonymous_aggr (t
);
4280 if (TYPE_FIELDS (t
))
4282 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4283 declspecs
, NORMAL
, 0, NULL
);
4284 finish_anon_union (decl
);
4291 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4294 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4295 const cp_declarator
*declarator
,
4296 bool is_template_arg
)
4300 enum decl_context context
4301 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4302 attrs
= type_specifiers
->attributes
;
4303 type_specifiers
->attributes
= NULL_TREE
;
4304 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4305 if (attrs
&& type
!= error_mark_node
)
4307 if (CLASS_TYPE_P (type
))
4308 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4309 "outside of definition", type
);
4310 else if (MAYBE_CLASS_TYPE_P (type
))
4311 /* A template type parameter or other dependent type. */
4312 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4313 "type %qT without an associated declaration", type
);
4315 cplus_decl_attributes (&type
, attrs
, 0);
4320 /* Process a DECLARATOR for a function-scope variable declaration,
4321 namespace-scope variable declaration, or function declaration.
4322 (Function definitions go through start_function; class member
4323 declarations appearing in the body of the class go through
4324 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4325 If an error occurs, the error_mark_node is returned instead.
4327 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4328 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4329 for an explicitly defaulted function, or SD_DELETED for an explicitly
4330 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4331 implicitly initialized via a default constructor. ATTRIBUTES and
4332 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4334 The scope represented by the context of the returned DECL is pushed
4335 (if it is not the global namespace) and is assigned to
4336 *PUSHED_SCOPE_P. The caller is then responsible for calling
4337 pop_scope on *PUSHED_SCOPE_P if it is set. */
4340 start_decl (const cp_declarator
*declarator
,
4341 cp_decl_specifier_seq
*declspecs
,
4344 tree prefix_attributes
,
4345 tree
*pushed_scope_p
)
4353 *pushed_scope_p
= NULL_TREE
;
4355 /* An object declared as __attribute__((deprecated)) suppresses
4356 warnings of uses of other deprecated items. */
4357 if (lookup_attribute ("deprecated", attributes
))
4358 deprecated_state
= DEPRECATED_SUPPRESS
;
4360 attributes
= chainon (attributes
, prefix_attributes
);
4362 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4365 deprecated_state
= DEPRECATED_NORMAL
;
4367 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4368 || decl
== error_mark_node
)
4369 return error_mark_node
;
4371 context
= CP_DECL_CONTEXT (decl
);
4372 if (context
!= global_namespace
)
4373 *pushed_scope_p
= push_scope (context
);
4376 /* Is it valid for this decl to have an initializer at all?
4377 If not, set INITIALIZED to zero, which will indirectly
4378 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4379 switch (TREE_CODE (decl
))
4382 error ("typedef %qD is initialized (use decltype instead)", decl
);
4383 return error_mark_node
;
4386 if (initialized
== SD_DELETED
)
4387 /* We'll handle the rest of the semantics later, but we need to
4388 set this now so it's visible to duplicate_decls. */
4389 DECL_DELETED_FN (decl
) = 1;
4398 if (! toplevel_bindings_p ()
4399 && DECL_EXTERNAL (decl
))
4400 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4402 DECL_EXTERNAL (decl
) = 0;
4403 if (toplevel_bindings_p ())
4404 TREE_STATIC (decl
) = 1;
4406 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4408 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4409 record_key_method_defined (decl
);
4411 /* If this is a typedef that names the class for linkage purposes
4412 (7.1.3p8), apply any attributes directly to the type. */
4413 if (TREE_CODE (decl
) == TYPE_DECL
4414 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4415 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4416 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4420 /* Set attributes here so if duplicate decl, will have proper attributes. */
4421 cplus_decl_attributes (&decl
, attributes
, flags
);
4423 /* Dllimported symbols cannot be defined. Static data members (which
4424 can be initialized in-class and dllimported) go through grokfield,
4425 not here, so we don't need to exclude those decls when checking for
4427 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4429 error ("definition of %q#D is marked %<dllimport%>", decl
);
4430 DECL_DLLIMPORT_P (decl
) = 0;
4433 /* If #pragma weak was used, mark the decl weak now. */
4434 if (!processing_template_decl
)
4435 maybe_apply_pragma_weak (decl
);
4437 if (TREE_CODE (decl
) == FUNCTION_DECL
4438 && DECL_DECLARED_INLINE_P (decl
)
4439 && DECL_UNINLINABLE (decl
)
4440 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4441 warning (0, "inline function %q+D given attribute noinline", decl
);
4443 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4445 if (TREE_CODE (decl
) == VAR_DECL
)
4447 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4448 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4449 error ("%q#D is not a static member of %q#T", decl
, context
);
4452 if (DECL_CONTEXT (field
) != context
)
4454 if (!same_type_p (DECL_CONTEXT (field
), context
))
4455 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4456 "to be defined as %<%T::%D%>",
4457 DECL_CONTEXT (field
), DECL_NAME (decl
),
4458 context
, DECL_NAME (decl
));
4459 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4461 if (processing_specialization
4462 && template_class_depth (context
) == 0
4463 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4464 error ("template header not allowed in member definition "
4465 "of explicitly specialized class");
4466 /* Static data member are tricky; an in-class initialization
4467 still doesn't provide a definition, so the in-class
4468 declaration will have DECL_EXTERNAL set, but will have an
4469 initialization. Thus, duplicate_decls won't warn
4470 about this situation, and so we check here. */
4471 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4472 error ("duplicate initialization of %qD", decl
);
4473 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4475 if (declspecs
->specs
[(int) ds_constexpr
]
4476 && !DECL_DECLARED_CONSTEXPR_P (field
))
4477 error ("%qD declared %<constexpr%> outside its class", field
);
4482 tree field
= check_classfn (context
, decl
,
4483 (processing_template_decl
4484 > template_class_depth (context
))
4485 ? current_template_parms
4487 if (field
&& field
!= error_mark_node
4488 && duplicate_decls (decl
, field
,
4489 /*newdecl_is_friend=*/false))
4493 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4494 DECL_IN_AGGR_P (decl
) = 0;
4495 /* Do not mark DECL as an explicit specialization if it was not
4496 already marked as an instantiation; a declaration should
4497 never be marked as a specialization unless we know what
4498 template is being specialized. */
4499 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4501 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4503 /* [temp.expl.spec] An explicit specialization of a static data
4504 member of a template is a definition if the declaration
4505 includes an initializer; otherwise, it is a declaration.
4507 We check for processing_specialization so this only applies
4508 to the new specialization syntax. */
4509 if (!initialized
&& processing_specialization
)
4510 DECL_EXTERNAL (decl
) = 1;
4513 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4514 /* Aliases are definitions. */
4516 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4520 was_public
= TREE_PUBLIC (decl
);
4522 /* Enter this declaration into the symbol table. */
4523 decl
= maybe_push_decl (decl
);
4525 if (processing_template_decl
)
4526 decl
= push_template_decl (decl
);
4527 if (decl
== error_mark_node
)
4528 return error_mark_node
;
4530 /* Tell the back end to use or not use .common as appropriate. If we say
4531 -fconserve-space, we want this to save .data space, at the expense of
4532 wrong semantics. If we say -fno-conserve-space, we want this to
4533 produce errors about redefs; to do this we force variables into the
4535 if (flag_conserve_space
4536 && TREE_CODE (decl
) == VAR_DECL
4537 && TREE_PUBLIC (decl
)
4538 && !DECL_THREAD_LOCAL_P (decl
)
4539 && !have_global_bss_p ())
4540 DECL_COMMON (decl
) = 1;
4542 if (TREE_CODE (decl
) == VAR_DECL
4543 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4544 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4546 /* This is a const variable with implicit 'static'. Set
4547 DECL_THIS_STATIC so we can tell it from variables that are
4548 !TREE_PUBLIC because of the anonymous namespace. */
4549 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4550 DECL_THIS_STATIC (decl
) = 1;
4553 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4554 start_decl_1 (decl
, initialized
);
4559 /* Process the declaration of a variable DECL. INITIALIZED is true
4560 iff DECL is explicitly initialized. (INITIALIZED is false if the
4561 variable is initialized via an implicitly-called constructor.)
4562 This function must be called for ordinary variables (including, for
4563 example, implicit instantiations of templates), but must not be
4564 called for template declarations. */
4567 start_decl_1 (tree decl
, bool initialized
)
4571 bool aggregate_definition_p
;
4573 gcc_assert (!processing_template_decl
);
4575 if (error_operand_p (decl
))
4578 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4580 type
= TREE_TYPE (decl
);
4581 complete_p
= COMPLETE_TYPE_P (type
);
4582 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4584 /* If an explicit initializer is present, or if this is a definition
4585 of an aggregate, then we need a complete type at this point.
4586 (Scalars are always complete types, so there is nothing to
4587 check.) This code just sets COMPLETE_P; errors (if necessary)
4588 are issued below. */
4589 if ((initialized
|| aggregate_definition_p
)
4591 && COMPLETE_TYPE_P (complete_type (type
)))
4594 /* We will not yet have set TREE_READONLY on DECL if the type
4595 was "const", but incomplete, before this point. But, now, we
4596 have a complete type, so we can try again. */
4597 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4601 /* Is it valid for this decl to have an initializer at all? */
4603 /* Don't allow initializations for incomplete types except for
4604 arrays which might be completed by the initialization. */
4606 ; /* A complete type is ok. */
4607 else if (type_uses_auto (type
))
4608 ; /* An auto type is ok. */
4609 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4611 error ("variable %q#D has initializer but incomplete type", decl
);
4612 type
= TREE_TYPE (decl
) = error_mark_node
;
4614 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4616 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4617 error ("elements of array %q#D have incomplete type", decl
);
4618 /* else we already gave an error in start_decl. */
4621 else if (aggregate_definition_p
&& !complete_p
)
4623 if (type_uses_auto (type
))
4624 error ("declaration of %q#D has no initializer", decl
);
4626 error ("aggregate %q#D has incomplete type and cannot be defined",
4628 /* Change the type so that assemble_variable will give
4629 DECL an rtl we can live with: (mem (const_int 0)). */
4630 type
= TREE_TYPE (decl
) = error_mark_node
;
4633 /* Create a new scope to hold this declaration if necessary.
4634 Whether or not a new scope is necessary cannot be determined
4635 until after the type has been completed; if the type is a
4636 specialization of a class template it is not until after
4637 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4638 will be set correctly. */
4639 maybe_push_cleanup_level (type
);
4642 /* Handle initialization of references. DECL, TYPE, and INIT have the
4643 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4644 but will be set to a new CLEANUP_STMT if a temporary is created
4645 that must be destroyed subsequently.
4647 Returns an initializer expression to use to initialize DECL, or
4648 NULL if the initialization can be performed statically.
4650 Quotes on semantics can be found in ARM 8.4.3. */
4653 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4655 if (init
== NULL_TREE
)
4657 if ((DECL_LANG_SPECIFIC (decl
) == 0
4658 || DECL_IN_AGGR_P (decl
) == 0)
4659 && ! DECL_THIS_EXTERN (decl
))
4660 error ("%qD declared as reference but not initialized", decl
);
4664 if (TREE_CODE (init
) == TREE_LIST
)
4665 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4666 tf_warning_or_error
);
4668 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4669 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4670 /* Note: default conversion is only called in very special cases. */
4671 init
= decay_conversion (init
);
4673 /* Convert INIT to the reference type TYPE. This may involve the
4674 creation of a temporary, whose lifetime must be the same as that
4675 of the reference. If so, a DECL_EXPR for the temporary will be
4676 added just after the DECL_EXPR for DECL. That's why we don't set
4677 DECL_INITIAL for local references (instead assigning to them
4678 explicitly); we need to allow the temporary to be initialized
4680 return initialize_reference (type
, init
, flags
,
4681 tf_warning_or_error
);
4684 /* Designated initializers in arrays are not supported in GNU C++.
4685 The parser cannot detect this error since it does not know whether
4686 a given brace-enclosed initializer is for a class type or for an
4687 array. This function checks that CE does not use a designated
4688 initializer. If it does, an error is issued. Returns true if CE
4689 is valid, i.e., does not have a designated initializer. */
4692 check_array_designated_initializer (const constructor_elt
*ce
,
4693 unsigned HOST_WIDE_INT index
)
4695 /* Designated initializers for array elements are not supported. */
4698 /* The parser only allows identifiers as designated
4700 if (ce
->index
== error_mark_node
)
4701 error ("name used in a GNU-style designated "
4702 "initializer for an array");
4703 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4705 /* A C99 designator is OK if it matches the current index. */
4706 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4709 sorry ("non-trivial designated initializers not supported");
4713 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4714 error ("name %qD used in a GNU-style designated "
4715 "initializer for an array", ce
->index
);
4723 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4724 array until we finish parsing the initializer. If that's the
4725 situation we're in, update DECL accordingly. */
4728 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4730 tree type
= TREE_TYPE (decl
);
4732 if (TREE_CODE (type
) == ARRAY_TYPE
4733 && TYPE_DOMAIN (type
) == NULL_TREE
4734 && TREE_CODE (decl
) != TYPE_DECL
)
4736 /* do_default is really a C-ism to deal with tentative definitions.
4737 But let's leave it here to ease the eventual merge. */
4738 int do_default
= !DECL_EXTERNAL (decl
);
4739 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4742 /* Check that there are no designated initializers in INIT, as
4743 those are not supported in GNU C++, and as the middle-end
4744 will crash if presented with a non-numeric designated
4746 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4748 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4749 constructor_elt
*ce
;
4751 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4752 if (!check_array_designated_initializer (ce
, i
))
4758 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4762 error ("initializer fails to determine size of %qD", decl
);
4763 TREE_TYPE (decl
) = error_mark_node
;
4765 else if (failure
== 2)
4769 error ("array size missing in %qD", decl
);
4770 TREE_TYPE (decl
) = error_mark_node
;
4772 /* If a `static' var's size isn't known, make it extern as
4773 well as static, so it does not get allocated. If it's not
4774 `static', then don't mark it extern; finish_incomplete_decl
4775 will give it a default size and it will get allocated. */
4776 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4777 DECL_EXTERNAL (decl
) = 1;
4779 else if (failure
== 3)
4781 error ("zero-size array %qD", decl
);
4782 TREE_TYPE (decl
) = error_mark_node
;
4786 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4788 relayout_decl (decl
);
4792 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4793 any appropriate error messages regarding the layout. */
4796 layout_var_decl (tree decl
)
4800 type
= TREE_TYPE (decl
);
4801 if (type
== error_mark_node
)
4804 /* If we haven't already layed out this declaration, do so now.
4805 Note that we must not call complete type for an external object
4806 because it's type might involve templates that we are not
4807 supposed to instantiate yet. (And it's perfectly valid to say
4808 `extern X x' for some incomplete type `X'.) */
4809 if (!DECL_EXTERNAL (decl
))
4810 complete_type (type
);
4811 if (!DECL_SIZE (decl
)
4812 && TREE_TYPE (decl
) != error_mark_node
4813 && (COMPLETE_TYPE_P (type
)
4814 || (TREE_CODE (type
) == ARRAY_TYPE
4815 && !TYPE_DOMAIN (type
)
4816 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4817 layout_decl (decl
, 0);
4819 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4821 /* An automatic variable with an incomplete type: that is an error.
4822 Don't talk about array types here, since we took care of that
4823 message in grokdeclarator. */
4824 error ("storage size of %qD isn%'t known", decl
);
4825 TREE_TYPE (decl
) = error_mark_node
;
4828 /* Keep this code around in case we later want to control debug info
4829 based on whether a type is "used". (jason 1999-11-11) */
4831 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4832 /* Let debugger know it should output info for this type. */
4833 note_debug_info_needed (ttype
);
4835 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4836 note_debug_info_needed (DECL_CONTEXT (decl
));
4839 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4840 && DECL_SIZE (decl
) != NULL_TREE
4841 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4843 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4844 constant_expression_warning (DECL_SIZE (decl
));
4847 error ("storage size of %qD isn%'t constant", decl
);
4848 TREE_TYPE (decl
) = error_mark_node
;
4853 /* If a local static variable is declared in an inline function, or if
4854 we have a weak definition, we must endeavor to create only one
4855 instance of the variable at link-time. */
4858 maybe_commonize_var (tree decl
)
4860 /* Static data in a function with comdat linkage also has comdat
4862 if (TREE_STATIC (decl
)
4863 /* Don't mess with __FUNCTION__. */
4864 && ! DECL_ARTIFICIAL (decl
)
4865 && DECL_FUNCTION_SCOPE_P (decl
)
4866 && vague_linkage_p (DECL_CONTEXT (decl
)))
4870 /* With weak symbols, we simply make the variable COMDAT;
4871 that will cause copies in multiple translations units to
4873 comdat_linkage (decl
);
4877 if (DECL_INITIAL (decl
) == NULL_TREE
4878 || DECL_INITIAL (decl
) == error_mark_node
)
4880 /* Without weak symbols, we can use COMMON to merge
4881 uninitialized variables. */
4882 TREE_PUBLIC (decl
) = 1;
4883 DECL_COMMON (decl
) = 1;
4887 /* While for initialized variables, we must use internal
4888 linkage -- which means that multiple copies will not
4890 TREE_PUBLIC (decl
) = 0;
4891 DECL_COMMON (decl
) = 0;
4892 warning_at (input_location
, 0,
4893 "sorry: semantics of inline function static "
4894 "data %q+#D are wrong (you%'ll wind up "
4895 "with multiple copies)", decl
);
4896 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4897 " you can work around this by removing "
4902 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4903 /* Set it up again; we might have set DECL_INITIAL since the last
4905 comdat_linkage (decl
);
4908 /* Issue an error message if DECL is an uninitialized const variable. */
4911 check_for_uninitialized_const_var (tree decl
)
4913 tree type
= strip_array_types (TREE_TYPE (decl
));
4915 /* ``Unless explicitly declared extern, a const object does not have
4916 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4918 if (TREE_CODE (decl
) == VAR_DECL
4919 && TREE_CODE (type
) != REFERENCE_TYPE
4920 && CP_TYPE_CONST_P (type
)
4921 && !DECL_INITIAL (decl
))
4923 tree field
= default_init_uninitialized_part (type
);
4927 permerror (DECL_SOURCE_LOCATION (decl
),
4928 "uninitialized const %qD", decl
);
4930 if (CLASS_TYPE_P (type
))
4932 tree defaulted_ctor
;
4934 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4935 "%q#T has no user-provided default constructor", type
);
4936 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4938 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4939 "constructor is not user-provided because it is "
4940 "explicitly defaulted in the class body");
4941 inform (0, "and the implicitly-defined constructor does not "
4942 "initialize %q+#D", field
);
4947 /* Structure holding the current initializer being processed by reshape_init.
4948 CUR is a pointer to the current element being processed, END is a pointer
4949 after the last element present in the initializer. */
4950 typedef struct reshape_iterator_t
4952 constructor_elt
*cur
;
4953 constructor_elt
*end
;
4956 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
4958 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4959 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4960 initialized. If there are no more such fields, the return value
4964 next_initializable_field (tree field
)
4967 && (TREE_CODE (field
) != FIELD_DECL
4968 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4969 || DECL_ARTIFICIAL (field
)))
4970 field
= DECL_CHAIN (field
);
4975 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4976 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4977 INTEGER_CST representing the size of the array minus one (the maximum index),
4978 or NULL_TREE if the array was declared without specifying the size. D is
4979 the iterator within the constructor. */
4982 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
4983 tsubst_flags_t complain
)
4986 bool sized_array_p
= (max_index
!= NULL_TREE
);
4987 unsigned HOST_WIDE_INT max_index_cst
= 0;
4988 unsigned HOST_WIDE_INT index
;
4990 /* The initializer for an array is always a CONSTRUCTOR. */
4991 new_init
= build_constructor (init_list_type_node
, NULL
);
4995 /* Minus 1 is used for zero sized arrays. */
4996 if (integer_all_onesp (max_index
))
4999 if (host_integerp (max_index
, 1))
5000 max_index_cst
= tree_low_cst (max_index
, 1);
5001 /* sizetype is sign extended, not zero extended. */
5003 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
5007 /* Loop until there are no more initializers. */
5009 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5014 check_array_designated_initializer (d
->cur
, index
);
5015 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5017 if (elt_init
== error_mark_node
)
5018 return error_mark_node
;
5019 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5020 size_int (index
), elt_init
);
5021 if (!TREE_CONSTANT (elt_init
))
5022 TREE_CONSTANT (new_init
) = false;
5028 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5029 Parameters are the same of reshape_init_r. */
5032 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5034 tree max_index
= NULL_TREE
;
5036 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5038 if (TYPE_DOMAIN (type
))
5039 max_index
= array_type_nelts (type
);
5041 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5044 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5045 Parameters are the same of reshape_init_r. */
5048 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5050 tree max_index
= NULL_TREE
;
5052 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5054 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5056 tree value
= d
->cur
->value
;
5057 if (!same_type_p (TREE_TYPE (value
), type
))
5059 if (complain
& tf_error
)
5060 error ("invalid type %qT as initializer for a vector of type %qT",
5061 TREE_TYPE (d
->cur
->value
), type
);
5062 value
= error_mark_node
;
5068 /* For a vector, we initialize it as an array of the appropriate size. */
5069 if (TREE_CODE (type
) == VECTOR_TYPE
)
5070 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5072 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5075 /* Subroutine of reshape_init_r, processes the initializers for classes
5076 or union. Parameters are the same of reshape_init_r. */
5079 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5080 tsubst_flags_t complain
)
5085 gcc_assert (CLASS_TYPE_P (type
));
5087 /* The initializer for a class is always a CONSTRUCTOR. */
5088 new_init
= build_constructor (init_list_type_node
, NULL
);
5089 field
= next_initializable_field (TYPE_FIELDS (type
));
5095 An initializer for an aggregate member that is an
5096 empty class shall have the form of an empty
5097 initializer-list {}. */
5098 if (!first_initializer_p
)
5100 if (complain
& tf_error
)
5101 error ("initializer for %qT must be brace-enclosed", type
);
5102 return error_mark_node
;
5107 /* Loop through the initializable fields, gathering initializers. */
5108 while (d
->cur
!= d
->end
)
5112 /* Handle designated initializers, as an extension. */
5115 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5117 if (complain
& tf_error
)
5118 error ("%<[%E] =%> used in a GNU-style designated initializer"
5119 " for class %qT", d
->cur
->index
, type
);
5120 return error_mark_node
;
5123 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5124 /* We already reshaped this. */
5125 gcc_assert (d
->cur
->index
== field
);
5127 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5129 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5131 if (complain
& tf_error
)
5132 error ("%qT has no non-static data member named %qD", type
,
5134 return error_mark_node
;
5138 /* If we processed all the member of the class, we are done. */
5142 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5143 /*first_initializer_p=*/false, complain
);
5144 if (field_init
== error_mark_node
)
5145 return error_mark_node
;
5147 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5151 When a union is initialized with a brace-enclosed
5152 initializer, the braces shall only contain an
5153 initializer for the first member of the union. */
5154 if (TREE_CODE (type
) == UNION_TYPE
)
5157 field
= next_initializable_field (DECL_CHAIN (field
));
5163 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5164 designators are not valid; either complain or return true to indicate
5165 that reshape_init_r should return error_mark_node. */
5168 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5172 if (complain
& tf_error
)
5173 error ("C99 designator %qE outside aggregate initializer",
5181 /* Subroutine of reshape_init, which processes a single initializer (part of
5182 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5183 iterator within the CONSTRUCTOR which points to the initializer to process.
5184 FIRST_INITIALIZER_P is true if this is the first initializer of the
5185 outermost CONSTRUCTOR node. */
5188 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5189 tsubst_flags_t complain
)
5191 tree init
= d
->cur
->value
;
5193 if (error_operand_p (init
))
5194 return error_mark_node
;
5196 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5197 && has_designator_problem (d
, complain
))
5198 return error_mark_node
;
5200 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5202 /* A complex type can be initialized from one or two initializers,
5203 but braces are not elided. */
5205 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5207 if (CONSTRUCTOR_NELTS (init
) > 2)
5209 if (complain
& tf_error
)
5210 error ("too many initializers for %qT", type
);
5212 return error_mark_node
;
5215 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5217 VEC(constructor_elt
, gc
) *v
= 0;
5218 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5219 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5220 if (has_designator_problem (d
, complain
))
5221 return error_mark_node
;
5223 init
= build_constructor (init_list_type_node
, v
);
5228 /* A non-aggregate type is always initialized with a single
5230 if (!CP_AGGREGATE_TYPE_P (type
))
5232 /* It is invalid to initialize a non-aggregate type with a
5233 brace-enclosed initializer before C++0x.
5234 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5235 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5236 a CONSTRUCTOR (with a record type). */
5237 if (TREE_CODE (init
) == CONSTRUCTOR
5238 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5240 if (SCALAR_TYPE_P (type
))
5242 if (complain
& tf_error
)
5243 error ("braces around scalar initializer for type %qT", type
);
5244 init
= error_mark_node
;
5247 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5256 All implicit type conversions (clause _conv_) are considered when
5257 initializing the aggregate member with an initializer from an
5258 initializer-list. If the initializer can initialize a member,
5259 the member is initialized. Otherwise, if the member is itself a
5260 non-empty subaggregate, brace elision is assumed and the
5261 initializer is considered for the initialization of the first
5262 member of the subaggregate. */
5263 if (TREE_CODE (init
) != CONSTRUCTOR
5264 /* But don't try this for the first initializer, since that would be
5265 looking through the outermost braces; A a2 = { a1 }; is not a
5266 valid aggregate initialization. */
5267 && !first_initializer_p
5268 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5269 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5275 /* [dcl.init.string]
5277 A char array (whether plain char, signed char, or unsigned char)
5278 can be initialized by a string-literal (optionally enclosed in
5279 braces); a wchar_t array can be initialized by a wide
5280 string-literal (optionally enclosed in braces). */
5281 if (TREE_CODE (type
) == ARRAY_TYPE
5282 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5284 tree str_init
= init
;
5286 /* Strip one level of braces if and only if they enclose a single
5287 element (as allowed by [dcl.init.string]). */
5288 if (!first_initializer_p
5289 && TREE_CODE (str_init
) == CONSTRUCTOR
5290 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5292 str_init
= VEC_index (constructor_elt
,
5293 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5296 /* If it's a string literal, then it's the initializer for the array
5297 as a whole. Otherwise, continue with normal initialization for
5298 array types (one value per array element). */
5299 if (TREE_CODE (str_init
) == STRING_CST
)
5301 if (has_designator_problem (d
, complain
))
5302 return error_mark_node
;
5308 /* The following cases are about aggregates. If we are not within a full
5309 initializer already, and there is not a CONSTRUCTOR, it means that there
5310 is a missing set of braces (that is, we are processing the case for
5311 which reshape_init exists). */
5312 if (!first_initializer_p
)
5314 if (TREE_CODE (init
) == CONSTRUCTOR
)
5316 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5317 /* There is no need to reshape pointer-to-member function
5318 initializers, as they are always constructed correctly
5319 by the front end. */
5321 else if (COMPOUND_LITERAL_P (init
))
5322 /* For a nested compound literal, there is no need to reshape since
5323 brace elision is not allowed. Even if we decided to allow it,
5324 we should add a call to reshape_init in finish_compound_literal,
5325 before calling digest_init, so changing this code would still
5326 not be necessary. */
5327 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5331 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5332 return reshape_init (type
, init
, complain
);
5336 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5340 /* Dispatch to specialized routines. */
5341 if (CLASS_TYPE_P (type
))
5342 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5343 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5344 return reshape_init_array (type
, d
, complain
);
5345 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5346 return reshape_init_vector (type
, d
, complain
);
5351 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5352 brace-enclosed aggregate initializer.
5354 INIT is the CONSTRUCTOR containing the list of initializers describing
5355 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5356 It may not presently match the shape of the TYPE; for example:
5358 struct S { int a; int b; };
5359 struct S a[] = { 1, 2, 3, 4 };
5361 Here INIT will hold a VEC of four elements, rather than a
5362 VEC of two elements, each itself a VEC of two elements. This
5363 routine transforms INIT from the former form into the latter. The
5364 revised CONSTRUCTOR node is returned. */
5367 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5369 VEC(constructor_elt
, gc
) *v
;
5373 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5375 v
= CONSTRUCTOR_ELTS (init
);
5377 /* An empty constructor does not need reshaping, and it is always a valid
5379 if (VEC_empty (constructor_elt
, v
))
5382 /* Recurse on this CONSTRUCTOR. */
5383 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5384 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5386 new_init
= reshape_init_r (type
, &d
, true, complain
);
5387 if (new_init
== error_mark_node
)
5388 return error_mark_node
;
5390 /* Make sure all the element of the constructor were used. Otherwise,
5391 issue an error about exceeding initializers. */
5394 if (complain
& tf_error
)
5395 error ("too many initializers for %qT", type
);
5397 return error_mark_node
;
5403 /* Verify array initializer. Returns true if errors have been reported. */
5406 check_array_initializer (tree decl
, tree type
, tree init
)
5408 tree element_type
= TREE_TYPE (type
);
5410 /* The array type itself need not be complete, because the
5411 initializer may tell us how many elements are in the array.
5412 But, the elements of the array must be complete. */
5413 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5416 error ("elements of array %q#D have incomplete type", decl
);
5418 error ("elements of array %q#T have incomplete type", type
);
5421 /* It is not valid to initialize a VLA. */
5423 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5424 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5427 error ("variable-sized object %qD may not be initialized", decl
);
5429 error ("variable-sized compound literal");
5435 /* Subroutine of check_initializer; args are passed down from that function.
5436 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5439 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5442 gcc_assert (stmts_are_full_exprs_p ());
5443 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5446 /* Verify INIT (the initializer for DECL), and record the
5447 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5448 grok_reference_init.
5450 If the return value is non-NULL, it is an expression that must be
5451 evaluated dynamically to initialize DECL. */
5454 check_initializer (tree decl
, tree init
, int flags
, VEC(tree
,gc
) **cleanups
)
5456 tree type
= TREE_TYPE (decl
);
5457 tree init_code
= NULL
;
5458 tree extra_init
= NULL_TREE
;
5461 /* Things that are going to be initialized need to have complete
5463 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5465 if (DECL_HAS_VALUE_EXPR_P (decl
))
5467 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5468 it doesn't have storage to be initialized. */
5469 gcc_assert (init
== NULL_TREE
);
5473 if (type
== error_mark_node
)
5474 /* We will have already complained. */
5477 if (TREE_CODE (type
) == ARRAY_TYPE
)
5479 if (check_array_initializer (decl
, type
, init
))
5482 else if (!COMPLETE_TYPE_P (type
))
5484 error ("%q#D has incomplete type", decl
);
5485 TREE_TYPE (decl
) = error_mark_node
;
5489 /* There is no way to make a variable-sized class type in GNU C++. */
5490 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5492 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5494 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5495 if (SCALAR_TYPE_P (type
))
5499 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5500 init
= build_zero_init (type
, NULL_TREE
, false);
5502 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5504 error ("scalar object %qD requires one element in initializer",
5506 TREE_TYPE (decl
) = error_mark_node
;
5512 if (TREE_CODE (decl
) == CONST_DECL
)
5514 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5516 DECL_INITIAL (decl
) = init
;
5518 gcc_assert (init
!= NULL_TREE
);
5521 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5523 else if (init
|| type_build_ctor_call (type
)
5524 || TREE_CODE (type
) == REFERENCE_TYPE
)
5526 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5528 init
= grok_reference_init (decl
, type
, init
, flags
);
5529 flags
|= LOOKUP_ALREADY_DIGESTED
;
5532 check_for_uninitialized_const_var (decl
);
5533 /* Do not reshape constructors of vectors (they don't need to be
5535 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5537 if (is_std_init_list (type
))
5539 init
= perform_implicit_conversion (type
, init
,
5540 tf_warning_or_error
);
5541 flags
|= LOOKUP_ALREADY_DIGESTED
;
5543 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5545 /* Don't reshape if the class has constructors. */
5546 if (cxx_dialect
== cxx98
)
5547 error ("in C++98 %qD must be initialized by constructor, "
5551 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5553 error ("opaque vector types cannot be initialized");
5554 init
= error_mark_node
;
5558 init
= reshape_init (type
, init
, tf_warning_or_error
);
5559 if (SCALAR_TYPE_P (type
))
5560 check_narrowing (type
, init
);
5564 /* If DECL has an array type without a specific bound, deduce the
5565 array size from the initializer. */
5566 maybe_deduce_size_from_array_init (decl
, init
);
5567 type
= TREE_TYPE (decl
);
5568 if (type
== error_mark_node
)
5571 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5572 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5573 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5574 && CP_AGGREGATE_TYPE_P (type
)))
5576 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5578 /* If this is a constexpr initializer, expand_default_init will
5579 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5580 case, pull the initializer back out and pass it down into
5581 store_init_value. */
5582 while (TREE_CODE (init_code
) == EXPR_STMT
5583 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5584 init_code
= TREE_OPERAND (init_code
, 0);
5585 if (TREE_CODE (init_code
) == INIT_EXPR
)
5587 init
= TREE_OPERAND (init_code
, 1);
5588 init_code
= NULL_TREE
;
5589 /* Don't call digest_init; it's unnecessary and will complain
5590 about aggregate initialization of non-aggregate classes. */
5591 flags
|= LOOKUP_ALREADY_DIGESTED
;
5593 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5595 /* Declared constexpr, but no suitable initializer; massage
5596 init appropriately so we can pass it into store_init_value
5598 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5599 init
= finish_compound_literal (type
, init
,
5600 tf_warning_or_error
);
5601 else if (CLASS_TYPE_P (type
)
5602 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5604 init
= build_functional_cast (type
, init
, tf_none
);
5605 if (init
!= error_mark_node
)
5606 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5608 init_code
= NULL_TREE
;
5614 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5616 /* In aggregate initialization of a variable, each element
5617 initialization is a full-expression because there is no
5618 enclosing expression. */
5619 gcc_assert (stmts_are_full_exprs_p ());
5621 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5623 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5624 && DECL_INITIAL (decl
)
5625 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5626 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5627 warning (0, "array %qD initialized by parenthesized string literal %qE",
5628 decl
, DECL_INITIAL (decl
));
5634 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5635 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5636 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5637 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5640 check_for_uninitialized_const_var (decl
);
5643 if (init
&& init
!= error_mark_node
)
5644 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5647 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5649 if (init_code
&& DECL_IN_AGGR_P (decl
))
5651 static int explained
= 0;
5653 if (cxx_dialect
< cxx0x
)
5654 error ("initializer invalid for static member with constructor");
5656 error ("non-constant in-class initialization invalid for static "
5657 "member %qD", decl
);
5660 error ("(an out of class initialization is required)");
5668 /* If DECL is not a local variable, give it RTL. */
5671 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5673 int toplev
= toplevel_bindings_p ();
5675 const char *filename
;
5677 /* Set the DECL_ASSEMBLER_NAME for the object. */
5680 /* The `register' keyword, when used together with an
5681 asm-specification, indicates that the variable should be
5682 placed in a particular register. */
5683 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5685 set_user_assembler_name (decl
, asmspec
);
5686 DECL_HARD_REGISTER (decl
) = 1;
5690 if (TREE_CODE (decl
) == FUNCTION_DECL
5691 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5692 set_builtin_user_assembler_name (decl
, asmspec
);
5693 set_user_assembler_name (decl
, asmspec
);
5697 /* Handle non-variables up front. */
5698 if (TREE_CODE (decl
) != VAR_DECL
)
5700 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5704 /* If we see a class member here, it should be a static data
5706 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5708 gcc_assert (TREE_STATIC (decl
));
5709 /* An in-class declaration of a static data member should be
5710 external; it is only a declaration, and not a definition. */
5711 if (init
== NULL_TREE
)
5712 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5715 /* We don't create any RTL for local variables. */
5716 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5719 /* We defer emission of local statics until the corresponding
5720 DECL_EXPR is expanded. */
5721 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5723 /* We try to defer namespace-scope static constants so that they are
5724 not emitted into the object file unnecessarily. */
5725 filename
= input_filename
;
5726 if (!DECL_VIRTUAL_P (decl
)
5727 && TREE_READONLY (decl
)
5728 && DECL_INITIAL (decl
) != NULL_TREE
5729 && DECL_INITIAL (decl
) != error_mark_node
5731 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5733 && !TREE_PUBLIC (decl
))
5735 /* Fool with the linkage of static consts according to #pragma
5737 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5738 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5740 TREE_PUBLIC (decl
) = 1;
5741 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5746 /* Likewise for template instantiations. */
5747 else if (DECL_LANG_SPECIFIC (decl
)
5748 && DECL_IMPLICIT_INSTANTIATION (decl
))
5751 /* If we're not deferring, go ahead and assemble the variable. */
5753 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5756 /* walk_tree helper for wrap_temporary_cleanups, below. */
5759 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5761 /* Stop at types or full-expression boundaries. */
5762 if (TYPE_P (*stmt_p
)
5763 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5769 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5771 tree guard
= (tree
)data
;
5772 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5774 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5775 /* Tell honor_protect_cleanup_actions to handle this as a separate
5777 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5779 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5785 /* We're initializing a local variable which has a cleanup GUARD. If there
5786 are any temporaries used in the initializer INIT of this variable, we
5787 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5788 variable will be cleaned up properly if one of them throws.
5790 Unfortunately, there's no way to express this properly in terms of
5791 nesting, as the regions for the temporaries overlap the region for the
5792 variable itself; if there are two temporaries, the variable needs to be
5793 the first thing destroyed if either of them throws. However, we only
5794 want to run the variable's cleanup if it actually got constructed. So
5795 we need to guard the temporary cleanups with the variable's cleanup if
5796 they are run on the normal path, but not if they are run on the
5797 exceptional path. We implement this by telling
5798 honor_protect_cleanup_actions to strip the variable cleanup from the
5799 exceptional path. */
5802 wrap_temporary_cleanups (tree init
, tree guard
)
5804 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5807 /* Generate code to initialize DECL (a local variable). */
5810 initialize_local_var (tree decl
, tree init
)
5812 tree type
= TREE_TYPE (decl
);
5816 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5817 || TREE_CODE (decl
) == RESULT_DECL
);
5818 gcc_assert (!TREE_STATIC (decl
));
5820 if (DECL_SIZE (decl
) == NULL_TREE
)
5822 /* If we used it already as memory, it must stay in memory. */
5823 DECL_INITIAL (decl
) = NULL_TREE
;
5824 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5828 if (type
== error_mark_node
)
5831 /* Compute and store the initial value. */
5832 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5833 if (TREE_USED (type
))
5834 DECL_READ_P (decl
) = 1;
5836 /* Generate a cleanup, if necessary. */
5837 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5839 /* Perform the initialization. */
5842 if (TREE_CODE (init
) == INIT_EXPR
5843 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5845 /* Stick simple initializers in DECL_INITIAL so that
5846 -Wno-init-self works (c++/34772). */
5847 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5848 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5852 int saved_stmts_are_full_exprs_p
;
5854 /* If we're only initializing a single object, guard the
5855 destructors of any temporaries used in its initializer with
5856 its destructor. This isn't right for arrays because each
5857 element initialization is a full-expression. */
5858 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5859 wrap_temporary_cleanups (init
, cleanup
);
5861 gcc_assert (building_stmt_list_p ());
5862 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5863 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5864 finish_expr_stmt (init
);
5865 current_stmt_tree ()->stmts_are_full_exprs_p
=
5866 saved_stmts_are_full_exprs_p
;
5870 /* Set this to 0 so we can tell whether an aggregate which was
5871 initialized was ever used. Don't do this if it has a
5872 destructor, so we don't complain about the 'resource
5873 allocation is initialization' idiom. Now set
5874 attribute((unused)) on types so decls of that type will be
5875 marked used. (see TREE_USED, above.) */
5876 if (TYPE_NEEDS_CONSTRUCTING (type
)
5878 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5879 && DECL_NAME (decl
))
5880 TREE_USED (decl
) = 0;
5881 else if (already_used
)
5882 TREE_USED (decl
) = 1;
5885 finish_decl_cleanup (decl
, cleanup
);
5888 /* DECL is a VAR_DECL for a compiler-generated variable with static
5889 storage duration (like a virtual table) whose initializer is a
5890 compile-time constant. Initialize the variable and provide it to the
5894 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5897 gcc_assert (DECL_ARTIFICIAL (decl
));
5898 init
= build_constructor (TREE_TYPE (decl
), v
);
5899 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5900 DECL_INITIAL (decl
) = init
;
5901 DECL_INITIALIZED_P (decl
) = 1;
5902 determine_visibility (decl
);
5903 layout_var_decl (decl
);
5904 maybe_commonize_var (decl
);
5905 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5908 /* INIT is the initializer for a variable, as represented by the
5909 parser. Returns true iff INIT is type-dependent. */
5912 type_dependent_init_p (tree init
)
5914 if (TREE_CODE (init
) == TREE_LIST
)
5915 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5916 return any_type_dependent_elements_p (init
);
5917 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5918 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5920 VEC(constructor_elt
, gc
) *elts
;
5924 elts
= CONSTRUCTOR_ELTS (init
);
5925 nelts
= VEC_length (constructor_elt
, elts
);
5926 for (i
= 0; i
< nelts
; ++i
)
5927 if (type_dependent_init_p (VEC_index (constructor_elt
,
5932 /* It must be a simple expression, e.g., int i = 3; */
5933 return type_dependent_expression_p (init
);
5938 /* INIT is the initializer for a variable, as represented by the
5939 parser. Returns true iff INIT is value-dependent. */
5942 value_dependent_init_p (tree init
)
5944 if (TREE_CODE (init
) == TREE_LIST
)
5945 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5946 return any_value_dependent_elements_p (init
);
5947 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5948 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5950 VEC(constructor_elt
, gc
) *elts
;
5954 elts
= CONSTRUCTOR_ELTS (init
);
5955 nelts
= VEC_length (constructor_elt
, elts
);
5956 for (i
= 0; i
< nelts
; ++i
)
5957 if (value_dependent_init_p (VEC_index (constructor_elt
,
5962 /* It must be a simple expression, e.g., int i = 3; */
5963 return value_dependent_expression_p (init
);
5968 /* Finish processing of a declaration;
5969 install its line number and initial value.
5970 If the length of an array type is not known before,
5971 it must be determined now, from the initial value, or it is an error.
5973 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5974 true, then INIT is an integral constant expression.
5976 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5977 if the (init) syntax was used. */
5980 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5981 tree asmspec_tree
, int flags
)
5984 VEC(tree
,gc
) *cleanups
= NULL
;
5985 const char *asmspec
= NULL
;
5986 int was_readonly
= 0;
5987 bool var_definition_p
= false;
5990 if (decl
== error_mark_node
)
5995 error ("assignment (not initialization) in declaration");
5999 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6000 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6001 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6003 type
= TREE_TYPE (decl
);
6004 if (type
== error_mark_node
)
6007 /* If a name was specified, get the string. */
6008 if (at_namespace_scope_p ())
6009 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6010 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6011 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6013 if (current_class_type
6014 && CP_DECL_CONTEXT (decl
) == current_class_type
6015 && TYPE_BEING_DEFINED (current_class_type
)
6016 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6017 && (DECL_INITIAL (decl
) || init
))
6018 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6020 if (TREE_CODE (decl
) != FUNCTION_DECL
6021 && (auto_node
= type_uses_auto (type
)))
6024 if (init
== NULL_TREE
)
6026 error ("declaration of %q#D has no initializer", decl
);
6027 TREE_TYPE (decl
) = error_mark_node
;
6031 if (TREE_CODE (d_init
) == TREE_LIST
)
6032 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6033 tf_warning_or_error
);
6034 d_init
= resolve_nondeduced_context (d_init
);
6035 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6037 if (type
== error_mark_node
)
6041 if (!ensure_literal_type_for_constexpr_object (decl
))
6042 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6044 if (TREE_CODE (decl
) == VAR_DECL
6045 && DECL_CLASS_SCOPE_P (decl
)
6046 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6047 check_static_variable_definition (decl
, type
);
6049 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6052 if (init
== ridpointers
[(int)RID_DELETE
])
6054 /* FIXME check this is 1st decl. */
6055 DECL_DELETED_FN (decl
) = 1;
6056 DECL_DECLARED_INLINE_P (decl
) = 1;
6057 DECL_INITIAL (decl
) = error_mark_node
;
6058 FOR_EACH_CLONE (clone
, decl
)
6060 DECL_DELETED_FN (clone
) = 1;
6061 DECL_DECLARED_INLINE_P (clone
) = 1;
6062 DECL_INITIAL (clone
) = error_mark_node
;
6066 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6068 if (defaultable_fn_check (decl
))
6069 DECL_DEFAULTED_FN (decl
) = 1;
6071 DECL_INITIAL (decl
) = NULL_TREE
;
6075 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6077 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6078 /* If DECL is a reference, then we want to know whether init is a
6079 reference constant; init_const_expr_p as passed tells us whether
6080 it's an rvalue constant. */
6081 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6082 init_const_expr_p
= potential_constant_expression (init
);
6083 if (init_const_expr_p
)
6085 /* Set these flags now for templates. We'll update the flags in
6086 store_init_value for instantiations. */
6087 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6088 if (decl_maybe_constant_var_p (decl
))
6089 TREE_CONSTANT (decl
) = 1;
6093 if (processing_template_decl
)
6095 bool type_dependent_p
;
6097 /* Add this declaration to the statement-tree. */
6098 if (at_function_scope_p ())
6099 add_decl_expr (decl
);
6101 type_dependent_p
= dependent_type_p (type
);
6103 if (check_for_bare_parameter_packs (init
))
6106 DECL_INITIAL (decl
) = NULL_TREE
;
6109 /* Generally, initializers in templates are expanded when the
6110 template is instantiated. But, if DECL is a variable constant
6111 then it can be used in future constant expressions, so its value
6112 must be available. */
6114 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6115 /* We can't do anything if the decl has dependent type. */;
6117 && init_const_expr_p
6118 && !type_dependent_p
6119 && decl_maybe_constant_var_p (decl
)
6120 && !type_dependent_init_p (init
)
6121 && !value_dependent_init_p (init
))
6123 /* This variable seems to be a non-dependent constant, so process
6124 its initializer. If check_initializer returns non-null the
6125 initialization wasn't constant after all. */
6127 cleanups
= make_tree_vector ();
6128 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6129 if (init_code
== NULL_TREE
)
6131 release_tree_vector (cleanups
);
6133 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6134 /* Deduce array size even if the initializer is dependent. */
6135 maybe_deduce_size_from_array_init (decl
, init
);
6138 DECL_INITIAL (decl
) = init
;
6142 /* Just store non-static data member initializers for later. */
6143 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6144 DECL_INITIAL (decl
) = init
;
6146 /* Take care of TYPE_DECLs up front. */
6147 if (TREE_CODE (decl
) == TYPE_DECL
)
6149 if (type
!= error_mark_node
6150 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6152 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6153 warning (0, "shadowing previous type declaration of %q#D", decl
);
6154 set_identifier_type_value (DECL_NAME (decl
), decl
);
6157 /* If we have installed this as the canonical typedef for this
6158 type, and that type has not been defined yet, delay emitting
6159 the debug information for it, as we will emit it later. */
6160 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6161 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6162 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6164 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6169 /* A reference will be modified here, as it is initialized. */
6170 if (! DECL_EXTERNAL (decl
)
6171 && TREE_READONLY (decl
)
6172 && TREE_CODE (type
) == REFERENCE_TYPE
)
6175 TREE_READONLY (decl
) = 0;
6178 if (TREE_CODE (decl
) == VAR_DECL
)
6180 /* Only variables with trivial initialization and destruction can
6181 have thread-local storage. */
6182 if (DECL_THREAD_LOCAL_P (decl
)
6183 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
6184 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
6185 error ("%qD cannot be thread-local because it has non-trivial "
6186 "type %qT", decl
, TREE_TYPE (decl
));
6187 /* If this is a local variable that will need a mangled name,
6188 register it now. We must do this before processing the
6189 initializer for the variable, since the initialization might
6190 require a guard variable, and since the mangled name of the
6191 guard variable will depend on the mangled name of this
6193 if (DECL_FUNCTION_SCOPE_P (decl
)
6194 && TREE_STATIC (decl
)
6195 && !DECL_ARTIFICIAL (decl
))
6197 push_local_name (decl
);
6198 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6199 || DECL_DESTRUCTOR_P (current_function_decl
))
6200 /* Normally local_decls is populated during GIMPLE lowering,
6201 but [cd]tors are never actually compiled directly. We need
6202 to put statics on the list so we can deal with the label
6203 address extension. */
6204 add_local_decl (cfun
, decl
);
6207 /* Convert the initializer to the type of DECL, if we have not
6208 already initialized DECL. */
6209 if (!DECL_INITIALIZED_P (decl
)
6210 /* If !DECL_EXTERNAL then DECL is being defined. In the
6211 case of a static data member initialized inside the
6212 class-specifier, there can be an initializer even if DECL
6213 is *not* defined. */
6214 && (!DECL_EXTERNAL (decl
) || init
))
6216 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6219 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6220 /* Allow libjava/prims.cc define primitive classes. */
6221 if (init
!= NULL_TREE
6222 || jclass
== NULL_TREE
6223 || TREE_CODE (jclass
) != TYPE_DECL
6224 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6225 || !same_type_ignoring_top_level_qualifiers_p
6226 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6227 error ("Java object %qD not allocated with %<new%>", decl
);
6230 cleanups
= make_tree_vector ();
6231 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6232 /* Thread-local storage cannot be dynamically initialized. */
6233 if (DECL_THREAD_LOCAL_P (decl
) && init
)
6235 error ("%qD is thread-local and so cannot be dynamically "
6236 "initialized", decl
);
6240 /* Check that the initializer for a static data member was a
6241 constant. Although we check in the parser that the
6242 initializer is an integral constant expression, we do not
6243 simplify division-by-zero at the point at which it
6244 occurs. Therefore, in:
6246 struct S { static const int i = 7 / 0; };
6248 we issue an error at this point. It would
6249 probably be better to forbid division by zero in
6250 integral constant expressions. */
6251 if (DECL_EXTERNAL (decl
) && init
)
6253 error ("%qD cannot be initialized by a non-constant expression"
6254 " when being declared", decl
);
6255 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6263 The memory occupied by any object of static storage
6264 duration is zero-initialized at program startup before
6265 any other initialization takes place.
6267 We cannot create an appropriate initializer until after
6268 the type of DECL is finalized. If DECL_INITIAL is set,
6269 then the DECL is statically initialized, and any
6270 necessary zero-initialization has already been performed. */
6271 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6272 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6273 /*nelts=*/NULL_TREE
,
6274 /*static_storage_p=*/true);
6275 /* Remember that the initialization for this variable has
6277 DECL_INITIALIZED_P (decl
) = 1;
6278 /* This declaration is the definition of this variable,
6279 unless we are initializing a static data member within
6280 the class specifier. */
6281 if (!DECL_EXTERNAL (decl
))
6282 var_definition_p
= true;
6284 /* If the variable has an array type, lay out the type, even if
6285 there is no initializer. It is valid to index through the
6286 array, and we must get TYPE_ALIGN set correctly on the array
6288 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6291 if (TREE_STATIC (decl
)
6292 && !at_function_scope_p ()
6293 && current_function_decl
== NULL
)
6294 /* So decl is a global variable or a static member of a
6295 non local class. Record the types it uses
6296 so that we can decide later to emit debug info for them. */
6297 record_types_used_by_current_var_decl (decl
);
6299 else if (TREE_CODE (decl
) == FIELD_DECL
6300 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6301 error ("non-static data member %qD has Java class type", decl
);
6303 /* Add this declaration to the statement-tree. This needs to happen
6304 after the call to check_initializer so that the DECL_EXPR for a
6305 reference temp is added before the DECL_EXPR for the reference itself. */
6306 if (DECL_FUNCTION_SCOPE_P (decl
))
6307 add_decl_expr (decl
);
6309 /* Let the middle end know about variables and functions -- but not
6310 static data members in uninstantiated class templates. */
6311 if (TREE_CODE (decl
) == VAR_DECL
6312 || TREE_CODE (decl
) == FUNCTION_DECL
)
6314 if (TREE_CODE (decl
) == VAR_DECL
)
6316 layout_var_decl (decl
);
6317 maybe_commonize_var (decl
);
6320 /* This needs to happen after the linkage is set. */
6321 determine_visibility (decl
);
6323 if (var_definition_p
&& TREE_STATIC (decl
))
6325 /* If a TREE_READONLY variable needs initialization
6326 at runtime, it is no longer readonly and we need to
6327 avoid MEM_READONLY_P being set on RTL created for it. */
6330 if (TREE_READONLY (decl
))
6331 TREE_READONLY (decl
) = 0;
6334 else if (was_readonly
)
6335 TREE_READONLY (decl
) = 1;
6338 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6340 /* Check for abstractness of the type. Notice that there is no
6341 need to strip array types here since the check for those types
6342 is already done within create_array_type_for_decl. */
6343 if (TREE_CODE (type
) == FUNCTION_TYPE
6344 || TREE_CODE (type
) == METHOD_TYPE
)
6345 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6347 abstract_virtuals_error (decl
, type
);
6349 if (TREE_TYPE (decl
) == error_mark_node
)
6350 /* No initialization required. */
6352 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6356 if (init
== ridpointers
[(int)RID_DEFAULT
])
6358 /* An out-of-class default definition is defined at
6359 the point where it is explicitly defaulted. */
6360 if (DECL_DELETED_FN (decl
))
6361 maybe_explain_implicit_delete (decl
);
6362 else if (DECL_INITIAL (decl
) == error_mark_node
)
6363 synthesize_method (decl
);
6366 error ("function %q#D is initialized like a variable", decl
);
6368 /* else no initialization required. */
6370 else if (DECL_EXTERNAL (decl
)
6371 && ! (DECL_LANG_SPECIFIC (decl
)
6372 && DECL_NOT_REALLY_EXTERN (decl
)))
6375 DECL_INITIAL (decl
) = init
;
6377 /* A variable definition. */
6378 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6379 /* Initialize the local variable. */
6380 initialize_local_var (decl
, init
);
6382 /* If a variable is defined, and then a subsequent
6383 definition with external linkage is encountered, we will
6384 get here twice for the same variable. We want to avoid
6385 calling expand_static_init more than once. For variables
6386 that are not static data members, we can call
6387 expand_static_init only when we actually process the
6388 initializer. It is not legal to redeclare a static data
6389 member, so this issue does not arise in that case. */
6390 else if (var_definition_p
&& TREE_STATIC (decl
))
6391 expand_static_init (decl
, init
);
6394 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6395 reference, insert it in the statement-tree now. */
6399 FOR_EACH_VEC_ELT (tree
, cleanups
, i
, t
)
6400 push_cleanup (decl
, t
, false);
6401 release_tree_vector (cleanups
);
6405 TREE_READONLY (decl
) = 1;
6407 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6410 /* Returns a declaration for a VAR_DECL as if:
6412 extern "C" TYPE NAME;
6414 had been seen. Used to create compiler-generated global
6418 declare_global_var (tree name
, tree type
)
6422 push_to_top_level ();
6423 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6424 TREE_PUBLIC (decl
) = 1;
6425 DECL_EXTERNAL (decl
) = 1;
6426 DECL_ARTIFICIAL (decl
) = 1;
6427 /* If the user has explicitly declared this variable (perhaps
6428 because the code we are compiling is part of a low-level runtime
6429 library), then it is possible that our declaration will be merged
6430 with theirs by pushdecl. */
6431 decl
= pushdecl (decl
);
6432 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6433 pop_from_top_level ();
6438 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6439 if "__cxa_atexit" is not being used) corresponding to the function
6440 to be called when the program exits. */
6443 get_atexit_fn_ptr_type (void)
6447 if (!atexit_fn_ptr_type_node
)
6450 if (flag_use_cxa_atexit
6451 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6452 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6453 arg_type
= ptr_type_node
;
6455 /* The parameter to "atexit" is "void (*)(void)". */
6456 arg_type
= NULL_TREE
;
6458 fn_type
= build_function_type_list (void_type_node
,
6459 arg_type
, NULL_TREE
);
6460 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6463 return atexit_fn_ptr_type_node
;
6466 /* Returns a pointer to the `atexit' function. Note that if
6467 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6468 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6471 get_atexit_node (void)
6477 bool use_aeabi_atexit
;
6482 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6484 /* The declaration for `__cxa_atexit' is:
6486 int __cxa_atexit (void (*)(void *), void *, void *)
6488 We build up the argument types and then the function type
6490 tree argtype0
, argtype1
, argtype2
;
6492 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6493 /* First, build the pointer-to-function type for the first
6495 fn_ptr_type
= get_atexit_fn_ptr_type ();
6496 /* Then, build the rest of the argument types. */
6497 argtype2
= ptr_type_node
;
6498 if (use_aeabi_atexit
)
6500 argtype1
= fn_ptr_type
;
6501 argtype0
= ptr_type_node
;
6505 argtype1
= ptr_type_node
;
6506 argtype0
= fn_ptr_type
;
6508 /* And the final __cxa_atexit type. */
6509 fn_type
= build_function_type_list (integer_type_node
,
6510 argtype0
, argtype1
, argtype2
,
6512 fn_ptr_type
= build_pointer_type (fn_type
);
6513 if (use_aeabi_atexit
)
6514 name
= "__aeabi_atexit";
6516 name
= "__cxa_atexit";
6520 /* The declaration for `atexit' is:
6522 int atexit (void (*)());
6524 We build up the argument types and then the function type
6526 fn_ptr_type
= get_atexit_fn_ptr_type ();
6527 /* Build the final atexit type. */
6528 fn_type
= build_function_type_list (integer_type_node
,
6529 fn_ptr_type
, NULL_TREE
);
6533 /* Now, build the function declaration. */
6534 push_lang_context (lang_name_c
);
6535 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6536 mark_used (atexit_fndecl
);
6537 pop_lang_context ();
6538 atexit_node
= decay_conversion (atexit_fndecl
);
6543 /* Returns the __dso_handle VAR_DECL. */
6546 get_dso_handle_node (void)
6548 if (dso_handle_node
)
6549 return dso_handle_node
;
6551 /* Declare the variable. */
6552 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6555 #ifdef HAVE_GAS_HIDDEN
6556 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6557 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6560 return dso_handle_node
;
6563 /* Begin a new function with internal linkage whose job will be simply
6564 to destroy some particular variable. */
6566 static GTY(()) int start_cleanup_cnt
;
6569 start_cleanup_fn (void)
6574 bool use_cxa_atexit
= flag_use_cxa_atexit
6575 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6577 push_to_top_level ();
6579 /* No need to mangle this. */
6580 push_lang_context (lang_name_c
);
6582 /* Build the name of the function. */
6583 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6584 /* Build the function declaration. */
6585 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6586 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6587 /* It's a function with internal linkage, generated by the
6589 TREE_PUBLIC (fndecl
) = 0;
6590 DECL_ARTIFICIAL (fndecl
) = 1;
6591 /* Make the function `inline' so that it is only emitted if it is
6592 actually needed. It is unlikely that it will be inlined, since
6593 it is only called via a function pointer, but we avoid unnecessary
6594 emissions this way. */
6595 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6596 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6597 /* Build the parameter. */
6602 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6603 DECL_CONTEXT (parmdecl
) = fndecl
;
6604 TREE_USED (parmdecl
) = 1;
6605 DECL_READ_P (parmdecl
) = 1;
6606 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6610 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6612 pop_lang_context ();
6614 return current_function_decl
;
6617 /* Finish the cleanup function begun by start_cleanup_fn. */
6620 end_cleanup_fn (void)
6622 expand_or_defer_fn (finish_function (0));
6624 pop_from_top_level ();
6627 /* Generate code to handle the destruction of DECL, an object with
6628 static storage duration. */
6631 register_dtor_fn (tree decl
)
6638 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6640 type
= TREE_TYPE (decl
);
6641 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6642 return void_zero_node
;
6644 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6645 a class object, we can just pass the destructor to
6646 "__cxa_atexit"; we don't have to build a temporary function to do
6648 use_dtor
= (flag_use_cxa_atexit
6649 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6650 && CLASS_TYPE_P (type
));
6655 /* Find the destructor. */
6656 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6657 gcc_assert (idx
>= 0);
6658 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6659 /* Make sure it is accessible. */
6660 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6664 /* Call build_cleanup before we enter the anonymous function so
6665 that any access checks will be done relative to the current
6666 scope, rather than the scope of the anonymous function. */
6667 build_cleanup (decl
);
6669 /* Now start the function. */
6670 cleanup
= start_cleanup_fn ();
6672 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6673 to the original function, rather than the anonymous one. That
6674 will make the back end think that nested functions are in use,
6675 which causes confusion. */
6676 push_deferring_access_checks (dk_no_check
);
6677 fcall
= build_cleanup (decl
);
6678 pop_deferring_access_checks ();
6680 /* Create the body of the anonymous function. */
6681 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6682 finish_expr_stmt (fcall
);
6683 finish_compound_stmt (compound_stmt
);
6687 /* Call atexit with the cleanup function. */
6688 mark_used (cleanup
);
6689 cleanup
= build_address (cleanup
);
6690 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6696 /* We must convert CLEANUP to the type that "__cxa_atexit"
6698 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6699 /* "__cxa_atexit" will pass the address of DECL to the
6700 cleanup function. */
6702 addr
= build_address (decl
);
6703 /* The declared type of the parameter to "__cxa_atexit" is
6704 "void *". For plain "T*", we could just let the
6705 machinery in cp_build_function_call convert it -- but if the
6706 type is "cv-qualified T *", then we need to convert it
6707 before passing it in, to avoid spurious errors. */
6708 addr
= build_nop (ptr_type_node
, addr
);
6711 /* Since the cleanup functions we build ignore the address
6712 they're given, there's no reason to pass the actual address
6713 in, and, in general, it's cheaper to pass NULL than any
6715 addr
= null_pointer_node
;
6716 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6717 tf_warning_or_error
);
6718 if (targetm
.cxx
.use_aeabi_atexit ())
6731 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6732 arg0
, arg1
, arg2
, NULL_TREE
);
6735 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6736 is its initializer. Generate code to handle the construction
6737 and destruction of DECL. */
6740 expand_static_init (tree decl
, tree init
)
6742 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6743 gcc_assert (TREE_STATIC (decl
));
6745 /* Some variables require no dynamic initialization. */
6747 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6750 if (DECL_FUNCTION_SCOPE_P (decl
))
6752 /* Emit code to perform this initialization but once. */
6753 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6754 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6755 tree guard
, guard_addr
;
6758 /* Emit code to perform this initialization but once. This code
6761 static <type> guard;
6762 if (!guard.first_byte) {
6763 if (__cxa_guard_acquire (&guard)) {
6766 // Do initialization.
6767 flag = true; __cxa_guard_release (&guard);
6768 // Register variable for destruction at end of program.
6770 if (!flag) __cxa_guard_abort (&guard);
6774 Note that the `flag' variable is only set to 1 *after* the
6775 initialization is complete. This ensures that an exception,
6776 thrown during the construction, will cause the variable to
6777 reinitialized when we pass through this code again, as per:
6781 If the initialization exits by throwing an exception, the
6782 initialization is not complete, so it will be tried again
6783 the next time control enters the declaration.
6785 This process should be thread-safe, too; multiple threads
6786 should not be able to initialize the variable more than
6789 /* Create the guard variable. */
6790 guard
= get_guard (decl
);
6792 /* This optimization isn't safe on targets with relaxed memory
6793 consistency. On such targets we force synchronization in
6794 __cxa_guard_acquire. */
6795 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6797 /* Begin the conditional initialization. */
6798 if_stmt
= begin_if_stmt ();
6799 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6800 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6803 if (flag_threadsafe_statics
)
6805 tree vfntype
= NULL_TREE
;
6806 tree acquire_name
, release_name
, abort_name
;
6807 tree acquire_fn
, release_fn
, abort_fn
;
6808 guard_addr
= build_address (guard
);
6810 acquire_name
= get_identifier ("__cxa_guard_acquire");
6811 release_name
= get_identifier ("__cxa_guard_release");
6812 abort_name
= get_identifier ("__cxa_guard_abort");
6813 acquire_fn
= identifier_global_value (acquire_name
);
6814 release_fn
= identifier_global_value (release_name
);
6815 abort_fn
= identifier_global_value (abort_name
);
6817 acquire_fn
= push_library_fn
6818 (acquire_name
, build_function_type_list (integer_type_node
,
6819 TREE_TYPE (guard_addr
),
6822 if (!release_fn
|| !abort_fn
)
6823 vfntype
= build_function_type_list (void_type_node
,
6824 TREE_TYPE (guard_addr
),
6827 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6829 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6831 inner_if_stmt
= begin_if_stmt ();
6832 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6835 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6836 begin
= get_target_expr (boolean_false_node
);
6837 flag
= TARGET_EXPR_SLOT (begin
);
6839 TARGET_EXPR_CLEANUP (begin
)
6840 = build3 (COND_EXPR
, void_type_node
, flag
,
6842 build_call_n (abort_fn
, 1, guard_addr
));
6843 CLEANUP_EH_ONLY (begin
) = 1;
6845 /* Do the initialization itself. */
6846 init
= add_stmt_to_compound (begin
, init
);
6847 init
= add_stmt_to_compound
6848 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6849 init
= add_stmt_to_compound
6850 (init
, build_call_n (release_fn
, 1, guard_addr
));
6853 init
= add_stmt_to_compound (init
, set_guard (guard
));
6855 /* Use atexit to register a function for destroying this static
6857 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6859 finish_expr_stmt (init
);
6861 if (flag_threadsafe_statics
)
6863 finish_compound_stmt (inner_then_clause
);
6864 finish_then_clause (inner_if_stmt
);
6865 finish_if_stmt (inner_if_stmt
);
6868 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6870 finish_compound_stmt (then_clause
);
6871 finish_then_clause (if_stmt
);
6872 finish_if_stmt (if_stmt
);
6876 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6880 /* Make TYPE a complete type based on INITIAL_VALUE.
6881 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6882 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6883 3 if the initializer list is empty (in pedantic mode). */
6886 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6889 tree type
, elt_type
;
6893 unsigned HOST_WIDE_INT i
;
6896 /* An array of character type can be initialized from a
6897 brace-enclosed string constant.
6899 FIXME: this code is duplicated from reshape_init. Probably
6900 we should just call reshape_init here? */
6901 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6902 && TREE_CODE (initial_value
) == CONSTRUCTOR
6903 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6905 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6906 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6908 if (TREE_CODE (value
) == STRING_CST
6909 && VEC_length (constructor_elt
, v
) == 1)
6910 initial_value
= value
;
6913 /* If any of the elements are parameter packs, we can't actually
6914 complete this type now because the array size is dependent. */
6915 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6917 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6920 if (PACK_EXPANSION_P (value
))
6926 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6928 /* We can create the array before the element type is complete, which
6929 means that we didn't have these two bits set in the original type
6930 either. In completing the type, we are expected to propagate these
6931 bits. See also complete_type which does the same thing for arrays
6934 if (TYPE_DOMAIN (type
))
6936 elt_type
= TREE_TYPE (type
);
6937 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6938 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6939 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6945 /* As above, but either give an error or reject zero-size arrays, depending
6949 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
6950 bool do_default
, tsubst_flags_t complain
)
6953 bool sfinae
= !(complain
& tf_error
);
6954 /* In SFINAE context we can't be lenient about zero-size arrays. */
6957 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
6963 /* Not an error. */;
6964 else if (failure
== 1)
6965 error ("initializer fails to determine size of %qT", *ptype
);
6966 else if (failure
== 2)
6969 error ("array size missing in %qT", *ptype
);
6971 else if (failure
== 3)
6972 error ("zero-size array %qT", *ptype
);
6973 *ptype
= error_mark_node
;
6978 /* Return zero if something is declared to be a member of type
6979 CTYPE when in the context of CUR_TYPE. STRING is the error
6980 message to print in that case. Otherwise, quietly return 1. */
6983 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6985 if (ctype
&& ctype
!= cur_type
)
6987 if (flags
== DTOR_FLAG
)
6988 error ("destructor for alien class %qT cannot be a member", ctype
);
6990 error ("constructor for alien class %qT cannot be a member", ctype
);
6996 /* Subroutine of `grokdeclarator'. */
6998 /* Generate errors possibly applicable for a given set of specifiers.
6999 This is for ARM $7.1.2. */
7002 bad_specifiers (tree object
,
7003 enum bad_spec_place type
,
7014 error ("%qD declared as a %<virtual%> variable", object
);
7016 error ("%qD declared as an %<inline%> variable", object
);
7018 error ("%<const%> and %<volatile%> function specifiers on "
7019 "%qD invalid in variable declaration", object
);
7023 error ("%qD declared as a %<virtual%> parameter", object
);
7025 error ("%qD declared as an %<inline%> parameter", object
);
7027 error ("%<const%> and %<volatile%> function specifiers on "
7028 "%qD invalid in parameter declaration", object
);
7032 error ("%qD declared as a %<virtual%> type", object
);
7034 error ("%qD declared as an %<inline%> type", object
);
7036 error ("%<const%> and %<volatile%> function specifiers on "
7037 "%qD invalid in type declaration", object
);
7041 error ("%qD declared as a %<virtual%> field", object
);
7043 error ("%qD declared as an %<inline%> field", object
);
7045 error ("%<const%> and %<volatile%> function specifiers on "
7046 "%qD invalid in field declaration", object
);
7052 error ("%q+D declared as a friend", object
);
7054 && (TREE_CODE (object
) == TYPE_DECL
7055 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7056 && !TYPE_REFFN_P (TREE_TYPE (object
))
7057 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7058 error ("%q+D declared with an exception specification", object
);
7061 /* DECL is a member function or static data member and is presently
7062 being defined. Check that the definition is taking place in a
7066 check_class_member_definition_namespace (tree decl
)
7068 /* These checks only apply to member functions and static data
7070 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7071 || TREE_CODE (decl
) == VAR_DECL
);
7072 /* We check for problems with specializations in pt.c in
7073 check_specialization_namespace, where we can issue better
7075 if (processing_specialization
)
7077 /* There are no restrictions on the placement of
7078 explicit instantiations. */
7079 if (processing_explicit_instantiation
)
7083 A member function definition that appears outside of the
7084 class definition shall appear in a namespace scope enclosing
7085 the class definition.
7089 The definition for a static data member shall appear in a
7090 namespace scope enclosing the member's class definition. */
7091 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7092 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7093 decl
, DECL_CONTEXT (decl
));
7096 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7097 METHOD_TYPE for a non-static member function; QUALS are the
7098 cv-qualifiers that apply to the function. */
7101 build_this_parm (tree type
, cp_cv_quals quals
)
7106 cp_cv_quals this_quals
;
7108 if (CLASS_TYPE_P (type
))
7111 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7112 this_type
= build_pointer_type (this_type
);
7115 this_type
= type_of_this_parm (type
);
7116 /* The `this' parameter is implicitly `const'; it cannot be
7118 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7119 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7120 parm
= build_artificial_parm (this_identifier
, qual_type
);
7121 cp_apply_type_quals_to_decl (this_quals
, parm
);
7125 /* DECL is a static member function. Complain if it was declared
7126 with function-cv-quals. */
7129 check_static_quals (tree decl
, cp_cv_quals quals
)
7131 if (quals
!= TYPE_UNQUALIFIED
)
7132 error ("static member function %q#D declared with type qualifiers",
7136 /* CTYPE is class type, or null if non-class.
7137 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7139 DECLARATOR is the function's name.
7140 PARMS is a chain of PARM_DECLs for the function.
7141 VIRTUALP is truthvalue of whether the function is virtual or not.
7142 FLAGS are to be passed through to `grokclassfn'.
7143 QUALS are qualifiers indicating whether the function is `const'
7145 RAISES is a list of exceptions that this function can raise.
7146 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7147 not look, and -1 if we should not call `grokclassfn' at all.
7149 SFK is the kind of special function (if any) for the new function.
7151 Returns `NULL_TREE' if something goes wrong, after issuing
7152 applicable error messages. */
7155 grokfndecl (tree ctype
,
7159 tree orig_declarator
,
7161 enum overload_flags flags
,
7168 special_function_kind sfk
,
7173 location_t location
)
7176 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7180 type
= build_exception_variant (type
, raises
);
7182 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7184 /* If we have an explicit location, use it, otherwise use whatever
7185 build_lang_decl used (probably input_location). */
7186 if (location
!= UNKNOWN_LOCATION
)
7187 DECL_SOURCE_LOCATION (decl
) = location
;
7189 if (TREE_CODE (type
) == METHOD_TYPE
)
7192 parm
= build_this_parm (type
, quals
);
7193 DECL_CHAIN (parm
) = parms
;
7196 DECL_ARGUMENTS (decl
) = parms
;
7197 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7198 DECL_CONTEXT (t
) = decl
;
7199 /* Propagate volatile out from type to decl. */
7200 if (TYPE_VOLATILE (type
))
7201 TREE_THIS_VOLATILE (decl
) = 1;
7203 /* Setup decl according to sfk. */
7206 case sfk_constructor
:
7207 case sfk_copy_constructor
:
7208 case sfk_move_constructor
:
7209 DECL_CONSTRUCTOR_P (decl
) = 1;
7211 case sfk_destructor
:
7212 DECL_DESTRUCTOR_P (decl
) = 1;
7218 /* If pointers to member functions use the least significant bit to
7219 indicate whether a function is virtual, ensure a pointer
7220 to this function will have that bit clear. */
7221 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7222 && TREE_CODE (type
) == METHOD_TYPE
7223 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7224 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7227 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7231 ("defining explicit specialization %qD in friend declaration",
7235 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7236 tree args
= TREE_OPERAND (orig_declarator
, 1);
7238 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7240 /* Something like `template <class T> friend void f<T>()'. */
7241 error ("invalid use of template-id %qD in declaration "
7242 "of primary template",
7248 /* A friend declaration of the form friend void f<>(). Record
7249 the information in the TEMPLATE_ID_EXPR. */
7250 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7252 if (TREE_CODE (fns
) == COMPONENT_REF
)
7254 /* Due to bison parser ickiness, we will have already looked
7255 up an operator_name or PFUNCNAME within the current class
7256 (see template_id in parse.y). If the current class contains
7257 such a name, we'll get a COMPONENT_REF here. Undo that. */
7259 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7260 == current_class_type
);
7261 fns
= TREE_OPERAND (fns
, 1);
7263 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7264 || TREE_CODE (fns
) == OVERLOAD
);
7265 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7267 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7268 if (TREE_PURPOSE (t
)
7269 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7271 error ("default arguments are not allowed in declaration "
7272 "of friend template specialization %qD",
7279 error ("%<inline%> is not allowed in declaration of friend "
7280 "template specialization %qD",
7287 /* If this decl has namespace scope, set that up. */
7289 set_decl_namespace (decl
, in_namespace
, friendp
);
7291 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7293 /* `main' and builtins have implicit 'C' linkage. */
7294 if ((MAIN_NAME_P (declarator
)
7295 || (IDENTIFIER_LENGTH (declarator
) > 10
7296 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7297 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7298 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7299 && current_lang_name
== lang_name_cplusplus
7300 && ctype
== NULL_TREE
7301 && DECL_FILE_SCOPE_P (decl
))
7302 SET_DECL_LANGUAGE (decl
, lang_c
);
7304 /* Should probably propagate const out from type to decl I bet (mrs). */
7307 DECL_STATIC_FUNCTION_P (decl
) = 1;
7308 DECL_CONTEXT (decl
) = ctype
;
7313 DECL_CONTEXT (decl
) = ctype
;
7315 check_class_member_definition_namespace (decl
);
7318 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7320 if (processing_template_decl
)
7321 error ("cannot declare %<::main%> to be a template");
7323 error ("cannot declare %<::main%> to be inline");
7325 error ("cannot declare %<::main%> to be static");
7330 /* Members of anonymous types and local classes have no linkage; make
7331 them internal. If a typedef is made later, this will be changed. */
7332 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7333 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7336 if (publicp
&& cxx_dialect
== cxx98
)
7338 /* [basic.link]: A name with no linkage (notably, the name of a class
7339 or enumeration declared in a local scope) shall not be used to
7340 declare an entity with linkage.
7342 DR 757 relaxes this restriction for C++0x. */
7343 t
= no_linkage_check (TREE_TYPE (decl
),
7344 /*relaxed_p=*/false);
7347 if (TYPE_ANONYMOUS_P (t
))
7349 if (DECL_EXTERN_C_P (decl
))
7350 /* Allow this; it's pretty common in C. */;
7353 permerror (input_location
, "anonymous type with no linkage "
7354 "used to declare function %q#D with linkage",
7356 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7357 permerror (input_location
, "%q+#D does not refer to the unqualified "
7358 "type, so it is not used for linkage",
7363 permerror (input_location
, "type %qT with no linkage used to "
7364 "declare function %q#D with linkage", t
, decl
);
7368 TREE_PUBLIC (decl
) = publicp
;
7371 DECL_INTERFACE_KNOWN (decl
) = 1;
7372 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7375 /* If the declaration was declared inline, mark it as such. */
7377 DECL_DECLARED_INLINE_P (decl
) = 1;
7379 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7381 DECL_EXTERNAL (decl
) = 1;
7382 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7385 ? G_("static member function %qD cannot have cv-qualifier")
7386 : G_("non-member function %qD cannot have cv-qualifier"),
7388 quals
= TYPE_UNQUALIFIED
;
7391 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7392 && !grok_op_properties (decl
, /*complain=*/true))
7394 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7396 bool long_long_unsigned_p
;
7398 const char *suffix
= NULL
;
7399 /* [over.literal]/6: Literal operators shall not have C linkage. */
7400 if (DECL_LANGUAGE (decl
) == lang_c
)
7402 error ("literal operator with C linkage");
7406 if (DECL_NAMESPACE_SCOPE_P (decl
))
7408 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7411 error ("%qD has invalid argument list", decl
);
7415 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7416 if (long_long_unsigned_p
)
7418 if (cpp_interpret_int_suffix (suffix
, strlen (suffix
)))
7419 warning (0, "integer suffix %<%s%>"
7420 " shadowed by implementation", suffix
);
7422 else if (long_double_p
)
7424 if (cpp_interpret_float_suffix (suffix
, strlen (suffix
)))
7425 warning (0, "floating point suffix %<%s%>"
7426 " shadowed by implementation", suffix
);
7431 error ("%qD must be a non-member function", decl
);
7437 /* Make the init_value nonzero so pushdecl knows this is not
7438 tentative. error_mark_node is replaced later with the BLOCK. */
7439 DECL_INITIAL (decl
) = error_mark_node
;
7441 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7442 TREE_NOTHROW (decl
) = 1;
7444 /* Caller will do the rest of this. */
7448 if (ctype
!= NULL_TREE
)
7449 grokclassfn (ctype
, decl
, flags
);
7451 decl
= check_explicit_specialization (orig_declarator
, decl
,
7454 4 * (friendp
!= 0));
7455 if (decl
== error_mark_node
)
7458 if (DECL_STATIC_FUNCTION_P (decl
))
7459 check_static_quals (decl
, quals
);
7463 cplus_decl_attributes (&decl
, *attrlist
, 0);
7464 *attrlist
= NULL_TREE
;
7467 /* Check main's type after attributes have been applied. */
7468 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7470 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7473 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7475 error ("%<::main%> must return %<int%>");
7476 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7477 TREE_TYPE (decl
) = newtype
;
7480 check_main_parameter_types (decl
);
7483 if (ctype
!= NULL_TREE
7484 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7487 tree old_decl
= check_classfn (ctype
, decl
,
7488 (processing_template_decl
7489 > template_class_depth (ctype
))
7490 ? current_template_parms
7493 if (old_decl
== error_mark_node
)
7501 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7502 /* Because grokfndecl is always supposed to return a
7503 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7504 here. We depend on our callers to figure out that its
7505 really a template that's being returned. */
7506 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7508 if (DECL_STATIC_FUNCTION_P (old_decl
)
7509 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7511 /* Remove the `this' parm added by grokclassfn. */
7512 revert_static_member_fn (decl
);
7513 check_static_quals (decl
, quals
);
7515 if (DECL_ARTIFICIAL (old_decl
))
7517 error ("definition of implicitly-declared %qD", old_decl
);
7520 else if (DECL_DEFAULTED_FN (old_decl
))
7522 error ("definition of explicitly-defaulted %q+D", decl
);
7523 error ("%q+#D explicitly defaulted here", old_decl
);
7527 /* Since we've smashed OLD_DECL to its
7528 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7529 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7530 decl
= DECL_TEMPLATE_RESULT (decl
);
7532 /* Attempt to merge the declarations. This can fail, in
7533 the case of some invalid specialization declarations. */
7534 pushed_scope
= push_scope (ctype
);
7535 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7537 pop_scope (pushed_scope
);
7540 error ("no %q#D member function declared in class %qT",
7548 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7551 if (ctype
== NULL_TREE
|| check
)
7555 DECL_VIRTUAL_P (decl
) = 1;
7560 /* decl is a FUNCTION_DECL.
7561 specifiers are the parsed virt-specifiers.
7563 Set flags to reflect the virt-specifiers.
7568 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7570 if (decl
== NULL_TREE
)
7572 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7573 DECL_OVERRIDE_P (decl
) = 1;
7574 if (specifiers
& VIRT_SPEC_FINAL
)
7575 DECL_FINAL_P (decl
) = 1;
7579 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7580 the linkage that DECL will receive in the object file. */
7583 set_linkage_for_static_data_member (tree decl
)
7585 /* A static data member always has static storage duration and
7586 external linkage. Note that static data members are forbidden in
7587 local classes -- the only situation in which a class has
7588 non-external linkage. */
7589 TREE_PUBLIC (decl
) = 1;
7590 TREE_STATIC (decl
) = 1;
7591 /* For non-template classes, static data members are always put
7592 out in exactly those files where they are defined, just as
7593 with ordinary namespace-scope variables. */
7594 if (!processing_template_decl
)
7595 DECL_INTERFACE_KNOWN (decl
) = 1;
7598 /* Create a VAR_DECL named NAME with the indicated TYPE.
7600 If SCOPE is non-NULL, it is the class type or namespace containing
7601 the variable. If SCOPE is NULL, the variable should is created in
7602 the innermost enclosings scope. */
7605 grokvardecl (tree type
,
7607 const cp_decl_specifier_seq
*declspecs
,
7613 tree explicit_scope
;
7615 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7617 /* Compute the scope in which to place the variable, but remember
7618 whether or not that scope was explicitly specified by the user. */
7619 explicit_scope
= scope
;
7622 /* An explicit "extern" specifier indicates a namespace-scope
7624 if (declspecs
->storage_class
== sc_extern
)
7625 scope
= current_decl_namespace ();
7626 else if (!at_function_scope_p ())
7627 scope
= current_scope ();
7631 && (/* If the variable is a namespace-scope variable declared in a
7632 template, we need DECL_LANG_SPECIFIC. */
7633 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7634 /* Similarly for namespace-scope variables with language linkage
7636 || (TREE_CODE (scope
) == NAMESPACE_DECL
7637 && current_lang_name
!= lang_name_cplusplus
)
7638 /* Similarly for static data members. */
7640 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7642 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7644 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7645 set_decl_namespace (decl
, explicit_scope
, 0);
7647 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7649 if (declspecs
->storage_class
== sc_extern
)
7651 DECL_THIS_EXTERN (decl
) = 1;
7652 DECL_EXTERNAL (decl
) = !initialized
;
7655 if (DECL_CLASS_SCOPE_P (decl
))
7657 set_linkage_for_static_data_member (decl
);
7658 /* This function is only called with out-of-class definitions. */
7659 DECL_EXTERNAL (decl
) = 0;
7660 check_class_member_definition_namespace (decl
);
7662 /* At top level, either `static' or no s.c. makes a definition
7663 (perhaps tentative), and absence of `static' makes it public. */
7664 else if (toplevel_bindings_p ())
7666 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7667 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7668 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7670 /* Not at top level, only `static' makes a static definition. */
7673 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7674 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7677 if (declspecs
->specs
[(int)ds_thread
])
7678 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7680 /* If the type of the decl has no linkage, make sure that we'll
7681 notice that in mark_used. */
7682 if (cxx_dialect
> cxx98
7683 && decl_linkage (decl
) != lk_none
7684 && DECL_LANG_SPECIFIC (decl
) == NULL
7685 && !DECL_EXTERN_C_P (decl
)
7686 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7687 retrofit_lang_decl (decl
);
7689 if (TREE_PUBLIC (decl
))
7691 /* [basic.link]: A name with no linkage (notably, the name of a class
7692 or enumeration declared in a local scope) shall not be used to
7693 declare an entity with linkage.
7695 DR 757 relaxes this restriction for C++0x. */
7696 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7697 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7700 if (TYPE_ANONYMOUS_P (t
))
7702 if (DECL_EXTERN_C_P (decl
))
7703 /* Allow this; it's pretty common in C. */
7707 /* DRs 132, 319 and 389 seem to indicate types with
7708 no linkage can only be used to declare extern "C"
7709 entities. Since it's not always an error in the
7710 ISO C++ 90 Standard, we only issue a warning. */
7711 warning (0, "anonymous type with no linkage used to declare "
7712 "variable %q#D with linkage", decl
);
7713 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7714 warning (0, "%q+#D does not refer to the unqualified "
7715 "type, so it is not used for linkage",
7720 warning (0, "type %qT with no linkage used to declare variable "
7721 "%q#D with linkage", t
, decl
);
7725 DECL_INTERFACE_KNOWN (decl
) = 1;
7730 /* Create and return a canonical pointer to member function type, for
7731 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7734 build_ptrmemfunc_type (tree type
)
7738 tree unqualified_variant
= NULL_TREE
;
7740 if (type
== error_mark_node
)
7743 /* If a canonical type already exists for this type, use it. We use
7744 this method instead of type_hash_canon, because it only does a
7745 simple equality check on the list of field members. */
7747 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7750 /* Make sure that we always have the unqualified pointer-to-member
7752 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7754 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7756 t
= make_class_type (RECORD_TYPE
);
7757 xref_basetypes (t
, NULL_TREE
);
7759 /* Let the front end know this is a pointer to member function... */
7760 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7761 /* ... and not really a class type. */
7762 SET_CLASS_TYPE_P (t
, 0);
7764 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7767 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7769 DECL_CHAIN (field
) = fields
;
7772 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7774 /* Zap out the name so that the back end will give us the debugging
7775 information for this anonymous RECORD_TYPE. */
7776 TYPE_NAME (t
) = NULL_TREE
;
7778 /* If this is not the unqualified form of this pointer-to-member
7779 type, set the TYPE_MAIN_VARIANT for this type to be the
7780 unqualified type. Since they are actually RECORD_TYPEs that are
7781 not variants of each other, we must do this manually.
7782 As we just built a new type there is no need to do yet another copy. */
7783 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7785 int type_quals
= cp_type_quals (type
);
7786 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7787 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7788 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7789 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7790 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7791 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7792 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7795 /* Cache this pointer-to-member type so that we can find it again
7797 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7799 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7800 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7801 else if (TYPE_CANONICAL (type
) != type
)
7802 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7807 /* Create and return a pointer to data member type. */
7810 build_ptrmem_type (tree class_type
, tree member_type
)
7812 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7814 cp_cv_quals quals
= type_memfn_quals (member_type
);
7815 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7816 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7820 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7821 return build_offset_type (class_type
, member_type
);
7825 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7826 Check to see that the definition is valid. Issue appropriate error
7827 messages. Return 1 if the definition is particularly bad, or 0
7831 check_static_variable_definition (tree decl
, tree type
)
7833 /* Can't check yet if we don't know the type. */
7834 if (dependent_type_p (type
))
7836 /* If DECL is declared constexpr, we'll do the appropriate checks
7837 in check_initializer. */
7838 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
7840 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7842 if (!COMPLETE_TYPE_P (type
))
7843 error ("in-class initialization of static data member %q#D of "
7844 "incomplete type", decl
);
7845 else if (literal_type_p (type
))
7846 permerror (input_location
,
7847 "%<constexpr%> needed for in-class initialization of "
7848 "static data member %q#D of non-integral type", decl
);
7850 error ("in-class initialization of static data member %q#D of "
7851 "non-literal type", decl
);
7855 /* Motion 10 at San Diego: If a static const integral data member is
7856 initialized with an integral constant expression, the initializer
7857 may appear either in the declaration (within the class), or in
7858 the definition, but not both. If it appears in the class, the
7859 member is a member constant. The file-scope definition is always
7861 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7863 error ("invalid in-class initialization of static data member "
7864 "of non-integral type %qT",
7868 else if (!CP_TYPE_CONST_P (type
))
7869 error ("ISO C++ forbids in-class initialization of non-const "
7870 "static member %qD",
7872 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7873 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7874 "%qD of non-integral type %qT", decl
, type
);
7879 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7880 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7881 expressions out into temporary variables so that walk_tree doesn't
7882 step into them (c++/15764). */
7885 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
7887 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
7888 tree expr
= *expr_p
;
7889 if (TREE_CODE (expr
) == SAVE_EXPR
)
7891 tree op
= TREE_OPERAND (expr
, 0);
7892 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
7893 if (TREE_SIDE_EFFECTS (op
))
7894 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
7897 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
7902 /* Entry point for the above. */
7905 stabilize_vla_size (tree size
)
7907 struct pointer_set_t
*pset
= pointer_set_create ();
7908 /* Break out any function calls into temporary variables. */
7909 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
7912 /* Given the SIZE (i.e., number of elements) in an array, compute an
7913 appropriate index type for the array. If non-NULL, NAME is the
7914 name of the thing being declared. */
7917 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
7922 tree abi_1_itype
= NULL_TREE
;
7924 if (error_operand_p (size
))
7925 return error_mark_node
;
7927 type
= TREE_TYPE (size
);
7928 /* type_dependent_expression_p? */
7929 if (!dependent_type_p (type
))
7931 mark_rvalue_use (size
);
7933 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
7934 && TREE_SIDE_EFFECTS (size
))
7935 /* In C++98, we mark a non-constant array bound with a magic
7936 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7939 size
= fold_non_dependent_expr (size
);
7941 if (CLASS_TYPE_P (type
)
7942 && CLASSTYPE_LITERAL_P (type
))
7944 size
= build_expr_type_conversion (WANT_INT
, size
, true);
7947 if (!(complain
& tf_error
))
7948 return error_mark_node
;
7950 error ("size of array %qD has non-integral type %qT",
7953 error ("size of array has non-integral type %qT", type
);
7954 size
= integer_one_node
;
7956 if (size
== error_mark_node
)
7957 return error_mark_node
;
7958 type
= TREE_TYPE (size
);
7959 /* We didn't support this case in GCC 3.2, so don't bother
7960 trying to model it now in ABI v1. */
7961 abi_1_itype
= error_mark_node
;
7964 size
= maybe_constant_value (size
);
7965 if (!TREE_CONSTANT (size
))
7969 if (error_operand_p (size
))
7970 return error_mark_node
;
7972 /* The array bound must be an integer type. */
7973 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7975 if (!(complain
& tf_error
))
7976 return error_mark_node
;
7978 error ("size of array %qD has non-integral type %qT", name
, type
);
7980 error ("size of array has non-integral type %qT", type
);
7981 size
= integer_one_node
;
7982 type
= TREE_TYPE (size
);
7986 /* A type is dependent if it is...an array type constructed from any
7987 dependent type or whose size is specified by a constant expression
7988 that is value-dependent. */
7989 /* We can only call value_dependent_expression_p on integral constant
7990 expressions; treat non-constant expressions as dependent, too. */
7991 if (processing_template_decl
7992 && (dependent_type_p (type
)
7993 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
7995 /* We cannot do any checking for a SIZE that isn't known to be
7996 constant. Just build the index type and mark that it requires
7997 structural equality checks. */
7998 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7999 size
, integer_one_node
));
8000 TYPE_DEPENDENT_P (itype
) = 1;
8001 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8002 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8006 if (!abi_version_at_least (2) && processing_template_decl
8007 && abi_1_itype
== NULL_TREE
)
8008 /* For abi-1, we handled all instances in templates the same way,
8009 even when they were non-dependent. This affects the manglings
8010 produced. So, we do the normal checking for non-dependent
8011 sizes, but at the end we'll return the same type that abi-1
8012 would have, but with TYPE_CANONICAL set to the "right"
8013 value that the current ABI would provide. */
8014 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8015 osize
, integer_one_node
));
8017 /* Normally, the array-bound will be a constant. */
8018 if (TREE_CODE (size
) == INTEGER_CST
)
8020 /* Check to see if the array bound overflowed. Make that an
8021 error, no matter how generous we're being. */
8022 constant_expression_error (size
);
8024 /* An array must have a positive number of elements. */
8025 if (INT_CST_LT (size
, integer_zero_node
))
8027 if (!(complain
& tf_error
))
8028 return error_mark_node
;
8030 error ("size of array %qD is negative", name
);
8032 error ("size of array is negative");
8033 size
= integer_one_node
;
8035 /* As an extension we allow zero-sized arrays. */
8036 else if (integer_zerop (size
))
8038 if (!(complain
& tf_error
))
8039 /* We must fail if performing argument deduction (as
8040 indicated by the state of complain), so that
8041 another substitution can be found. */
8042 return error_mark_node
;
8043 else if (in_system_header
)
8044 /* Allow them in system headers because glibc uses them. */;
8046 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
8048 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
8051 else if (TREE_CONSTANT (size
)
8052 /* We don't allow VLAs at non-function scopes, or during
8053 tentative template substitution. */
8054 || !at_function_scope_p () || !(complain
& tf_error
))
8056 if (!(complain
& tf_error
))
8057 return error_mark_node
;
8058 /* `(int) &fn' is not a valid array bound. */
8060 error ("size of array %qD is not an integral constant-expression",
8063 error ("size of array is not an integral constant-expression");
8064 size
= integer_one_node
;
8066 else if (pedantic
&& warn_vla
!= 0)
8069 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8071 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8073 else if (warn_vla
> 0)
8077 "variable length array %qD is used", name
);
8080 "variable length array is used");
8083 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8084 /* A variable sized array. */
8085 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8088 HOST_WIDE_INT saved_processing_template_decl
;
8090 /* Compute the index of the largest element in the array. It is
8091 one less than the number of elements in the array. We save
8092 and restore PROCESSING_TEMPLATE_DECL so that computations in
8093 cp_build_binary_op will be appropriately folded. */
8094 saved_processing_template_decl
= processing_template_decl
;
8095 processing_template_decl
= 0;
8096 itype
= cp_build_binary_op (input_location
,
8098 cp_convert (ssizetype
, size
),
8099 cp_convert (ssizetype
, integer_one_node
),
8100 tf_warning_or_error
);
8101 itype
= fold (itype
);
8102 processing_template_decl
= saved_processing_template_decl
;
8104 if (!TREE_CONSTANT (itype
))
8105 /* A variable sized array. */
8106 itype
= variable_size (itype
);
8107 /* Make sure that there was no overflow when creating to a signed
8108 index type. (For example, on a 32-bit machine, an array with
8109 size 2^32 - 1 is too big.) */
8110 else if (TREE_CODE (itype
) == INTEGER_CST
8111 && TREE_OVERFLOW (itype
))
8113 if (!(complain
& tf_error
))
8114 return error_mark_node
;
8115 error ("overflow in array dimension");
8116 TREE_OVERFLOW (itype
) = 0;
8120 /* Create and return the appropriate index type. */
8121 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8123 tree t
= build_index_type (itype
);
8124 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8125 itype
= abi_1_itype
;
8128 itype
= build_index_type (itype
);
8130 /* If the index type were dependent, we would have returned early, so
8131 remember that it isn't. */
8132 TYPE_DEPENDENT_P (itype
) = 0;
8133 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8137 /* Returns the scope (if any) in which the entity declared by
8138 DECLARATOR will be located. If the entity was declared with an
8139 unqualified name, NULL_TREE is returned. */
8142 get_scope_of_declarator (const cp_declarator
*declarator
)
8144 while (declarator
&& declarator
->kind
!= cdk_id
)
8145 declarator
= declarator
->declarator
;
8147 /* If the declarator-id is a SCOPE_REF, the scope in which the
8148 declaration occurs is the first operand. */
8150 && declarator
->u
.id
.qualifying_scope
)
8151 return declarator
->u
.id
.qualifying_scope
;
8153 /* Otherwise, the declarator is not a qualified name; the entity will
8154 be declared in the current scope. */
8158 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8159 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8163 create_array_type_for_decl (tree name
, tree type
, tree size
)
8165 tree itype
= NULL_TREE
;
8167 /* If things have already gone awry, bail now. */
8168 if (type
== error_mark_node
|| size
== error_mark_node
)
8169 return error_mark_node
;
8171 /* 8.3.4/1: If the type of the identifier of D contains the auto
8172 type-specifier, the program is ill-formed. */
8173 if (pedantic
&& type_uses_auto (type
))
8174 pedwarn (input_location
, OPT_pedantic
,
8175 "declaration of %qD as array of %<auto%>", name
);
8177 /* If there are some types which cannot be array elements,
8178 issue an error-message and return. */
8179 switch (TREE_CODE (type
))
8183 error ("declaration of %qD as array of void", name
);
8185 error ("creating array of void");
8186 return error_mark_node
;
8190 error ("declaration of %qD as array of functions", name
);
8192 error ("creating array of functions");
8193 return error_mark_node
;
8195 case REFERENCE_TYPE
:
8197 error ("declaration of %qD as array of references", name
);
8199 error ("creating array of references");
8200 return error_mark_node
;
8204 error ("declaration of %qD as array of function members", name
);
8206 error ("creating array of function members");
8207 return error_mark_node
;
8215 The constant expressions that specify the bounds of the arrays
8216 can be omitted only for the first member of the sequence. */
8217 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8220 error ("declaration of %qD as multidimensional array must "
8221 "have bounds for all dimensions except the first",
8224 error ("multidimensional array must have bounds for all "
8225 "dimensions except the first");
8227 return error_mark_node
;
8230 /* Figure out the index type for the array. */
8232 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8235 T is called the array element type; this type shall not be [...] an
8236 abstract class type. */
8237 abstract_virtuals_error (name
, type
);
8239 return build_cplus_array_type (type
, itype
);
8242 /* Check that it's OK to declare a function with the indicated TYPE.
8243 SFK indicates the kind of special function (if any) that this
8244 function is. OPTYPE is the type given in a conversion operator
8245 declaration, or the class type for a constructor/destructor.
8246 Returns the actual return type of the function; that
8247 may be different than TYPE if an error occurs, or for certain
8248 special functions. */
8251 check_special_function_return_type (special_function_kind sfk
,
8257 case sfk_constructor
:
8259 error ("return type specification for constructor invalid");
8261 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8262 type
= build_pointer_type (optype
);
8264 type
= void_type_node
;
8267 case sfk_destructor
:
8269 error ("return type specification for destructor invalid");
8270 /* We can't use the proper return type here because we run into
8271 problems with ambiguous bases and covariant returns.
8272 Java classes are left unchanged because (void *) isn't a valid
8273 Java type, and we don't want to change the Java ABI. */
8274 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8275 type
= build_pointer_type (void_type_node
);
8277 type
= void_type_node
;
8280 case sfk_conversion
:
8282 error ("return type specified for %<operator %T%>", optype
);
8293 /* A variable or data member (whose unqualified name is IDENTIFIER)
8294 has been declared with the indicated TYPE. If the TYPE is not
8295 acceptable, issue an error message and return a type to use for
8296 error-recovery purposes. */
8299 check_var_type (tree identifier
, tree type
)
8301 if (VOID_TYPE_P (type
))
8304 error ("unnamed variable or field declared void");
8305 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8307 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8308 error ("variable or field %qE declared void", identifier
);
8311 error ("variable or field declared void");
8312 type
= error_mark_node
;
8318 /* Given declspecs and a declarator (abstract or otherwise), determine
8319 the name and type of the object declared and construct a DECL node
8322 DECLSPECS points to the representation of declaration-specifier
8323 sequence that precedes declarator.
8325 DECL_CONTEXT says which syntactic context this declaration is in:
8326 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8327 FUNCDEF for a function definition. Like NORMAL but a few different
8328 error messages in each case. Return value may be zero meaning
8329 this definition is too screwy to try to parse.
8330 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8331 handle member functions (which have FIELD context).
8332 Return value may be zero meaning this definition is too screwy to
8334 PARM for a parameter declaration (either within a function prototype
8335 or before a function body). Make a PARM_DECL, or return void_type_node.
8336 TPARM for a template parameter declaration.
8337 CATCHPARM for a parameter declaration before a catch clause.
8338 TYPENAME if for a typename (in a cast or sizeof).
8339 Don't make a DECL node; just return the ..._TYPE node.
8340 FIELD for a struct or union field; make a FIELD_DECL.
8341 BITFIELD for a field with specified width.
8343 INITIALIZED is as for start_decl.
8345 ATTRLIST is a pointer to the list of attributes, which may be NULL
8346 if there are none; *ATTRLIST may be modified if attributes from inside
8347 the declarator should be applied to the declaration.
8349 When this function is called, scoping variables (such as
8350 CURRENT_CLASS_TYPE) should reflect the scope in which the
8351 declaration occurs, not the scope in which the new declaration will
8352 be placed. For example, on:
8356 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8359 Returns a DECL (if a declarator is present), a TYPE (if there is no
8360 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8364 grokdeclarator (const cp_declarator
*declarator
,
8365 const cp_decl_specifier_seq
*declspecs
,
8366 enum decl_context decl_context
,
8370 tree type
= NULL_TREE
;
8372 int explicit_int128
= 0;
8373 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8374 int explicit_int
= 0;
8375 int explicit_char
= 0;
8376 int defaulted_int
= 0;
8377 tree dependent_name
= NULL_TREE
;
8379 tree typedef_decl
= NULL_TREE
;
8380 const char *name
= NULL
;
8381 tree typedef_type
= NULL_TREE
;
8382 /* True if this declarator is a function definition. */
8383 bool funcdef_flag
= false;
8384 cp_declarator_kind innermost_code
= cdk_error
;
8387 /* See the code below that used this. */
8388 tree decl_attr
= NULL_TREE
;
8391 /* Keep track of what sort of function is being processed
8392 so that we can warn about default return values, or explicit
8393 return values which do not match prescribed defaults. */
8394 special_function_kind sfk
= sfk_none
;
8396 tree dname
= NULL_TREE
;
8397 tree ctor_return_type
= NULL_TREE
;
8398 enum overload_flags flags
= NO_SPECIAL
;
8399 /* cv-qualifiers that apply to the declarator, for a declaration of
8400 a member function. */
8401 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8402 /* virt-specifiers that apply to the declarator, for a declaration of
8403 a member function. */
8404 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8405 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8407 tree raises
= NULL_TREE
;
8408 int template_count
= 0;
8409 tree returned_attrs
= NULL_TREE
;
8410 tree parms
= NULL_TREE
;
8411 const cp_declarator
*id_declarator
;
8412 /* The unqualified name of the declarator; either an
8413 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8414 tree unqualified_id
;
8415 /* The class type, if any, in which this entity is located,
8416 or NULL_TREE if none. Note that this value may be different from
8417 the current class type; for example if an attempt is made to declare
8418 "A::f" inside "B", this value will be "A". */
8419 tree ctype
= current_class_type
;
8420 /* The NAMESPACE_DECL for the namespace in which this entity is
8421 located. If an unqualified name is used to declare the entity,
8422 this value will be NULL_TREE, even if the entity is located at
8424 tree in_namespace
= NULL_TREE
;
8425 cp_storage_class storage_class
;
8426 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8427 bool type_was_error_mark_node
= false;
8428 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8429 bool template_type_arg
= false;
8430 bool template_parm_flag
= false;
8431 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
8434 signed_p
= declspecs
->specs
[(int)ds_signed
];
8435 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
8436 short_p
= declspecs
->specs
[(int)ds_short
];
8437 long_p
= declspecs
->specs
[(int)ds_long
];
8438 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
8439 explicit_int128
= declspecs
->explicit_int128_p
;
8440 thread_p
= declspecs
->specs
[(int)ds_thread
];
8442 if (decl_context
== FUNCDEF
)
8443 funcdef_flag
= true, decl_context
= NORMAL
;
8444 else if (decl_context
== MEMFUNCDEF
)
8445 funcdef_flag
= true, decl_context
= FIELD
;
8446 else if (decl_context
== BITFIELD
)
8447 bitfield
= 1, decl_context
= FIELD
;
8448 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8449 template_type_arg
= true, decl_context
= TYPENAME
;
8450 else if (decl_context
== TPARM
)
8451 template_parm_flag
= true, decl_context
= PARM
;
8453 if (initialized
> 1)
8454 funcdef_flag
= true;
8456 /* Look inside a declarator for the name being declared
8457 and get it as a string, for an error message. */
8458 for (id_declarator
= declarator
;
8460 id_declarator
= id_declarator
->declarator
)
8462 if (id_declarator
->kind
!= cdk_id
)
8463 innermost_code
= id_declarator
->kind
;
8465 switch (id_declarator
->kind
)
8468 if (id_declarator
->declarator
8469 && id_declarator
->declarator
->kind
== cdk_id
)
8471 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8472 if (sfk
== sfk_destructor
)
8479 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8480 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8483 if (qualifying_scope
)
8485 if (at_function_scope_p ())
8489 A declarator-id shall not be qualified except
8492 None of the cases are permitted in block
8494 if (qualifying_scope
== global_namespace
)
8495 error ("invalid use of qualified-name %<::%D%>",
8497 else if (TYPE_P (qualifying_scope
))
8498 error ("invalid use of qualified-name %<%T::%D%>",
8499 qualifying_scope
, decl
);
8501 error ("invalid use of qualified-name %<%D::%D%>",
8502 qualifying_scope
, decl
);
8503 return error_mark_node
;
8505 else if (TYPE_P (qualifying_scope
))
8507 ctype
= qualifying_scope
;
8508 if (!MAYBE_CLASS_TYPE_P (ctype
))
8510 error ("%q#T is not a class or a namespace", ctype
);
8513 else if (innermost_code
!= cdk_function
8514 && current_class_type
8515 && !UNIQUELY_DERIVED_FROM_P (ctype
,
8516 current_class_type
))
8518 error ("type %qT is not derived from type %qT",
8519 ctype
, current_class_type
);
8520 return error_mark_node
;
8523 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8524 in_namespace
= qualifying_scope
;
8526 switch (TREE_CODE (decl
))
8532 if (innermost_code
!= cdk_function
)
8534 error ("declaration of %qD as non-function", decl
);
8535 return error_mark_node
;
8537 else if (!qualifying_scope
8538 && !(current_class_type
&& at_class_scope_p ()))
8540 error ("declaration of %qD as non-member", decl
);
8541 return error_mark_node
;
8544 type
= TREE_OPERAND (decl
, 0);
8546 type
= constructor_name (type
);
8547 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8552 case TEMPLATE_ID_EXPR
:
8554 tree fns
= TREE_OPERAND (decl
, 0);
8557 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8559 gcc_assert (is_overloaded_fn (dname
));
8560 dname
= DECL_NAME (get_first_fn (dname
));
8565 case IDENTIFIER_NODE
:
8566 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8569 if (C_IS_RESERVED_WORD (dname
))
8571 error ("declarator-id missing; using reserved word %qD",
8573 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8575 else if (!IDENTIFIER_TYPENAME_P (dname
))
8576 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8579 gcc_assert (flags
== NO_SPECIAL
);
8580 flags
= TYPENAME_FLAG
;
8581 ctor_return_type
= TREE_TYPE (dname
);
8582 sfk
= sfk_conversion
;
8583 if (is_typename_at_global_scope (dname
))
8584 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8586 name
= "<invalid operator>";
8603 return error_mark_node
;
8608 if (id_declarator
->kind
== cdk_id
)
8614 The declarator in a function-definition shall have the form
8615 D1 ( parameter-declaration-clause) ... */
8616 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8618 error ("function definition does not declare parameters");
8619 return error_mark_node
;
8622 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8623 && innermost_code
!= cdk_function
8624 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8626 error ("declaration of %qD as non-function", dname
);
8627 return error_mark_node
;
8631 && TREE_CODE (dname
) == IDENTIFIER_NODE
8632 && UDLIT_OPER_P (dname
)
8633 && innermost_code
!= cdk_function
)
8635 error ("declaration of %qD as non-function", dname
);
8636 return error_mark_node
;
8639 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8641 if (declspecs
->specs
[(int)ds_typedef
])
8643 error ("declaration of %qD as %<typedef%>", dname
);
8644 return error_mark_node
;
8646 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8648 error ("declaration of %qD as parameter", dname
);
8649 return error_mark_node
;
8653 /* Anything declared one level down from the top level
8654 must be one of the parameters of a function
8655 (because the body is at least two levels down). */
8657 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8658 by not allowing C++ class definitions to specify their parameters
8659 with xdecls (must be spec.d in the parmlist).
8661 Since we now wait to push a class scope until we are sure that
8662 we are in a legitimate method context, we must set oldcname
8663 explicitly (since current_class_name is not yet alive).
8665 We also want to avoid calling this a PARM if it is in a namespace. */
8667 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8669 cp_binding_level
*b
= current_binding_level
;
8670 current_binding_level
= b
->level_chain
;
8671 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8672 decl_context
= PARM
;
8673 current_binding_level
= b
;
8677 name
= decl_context
== PARM
? "parameter" : "type name";
8679 if (constexpr_p
&& declspecs
->specs
[(int)ds_typedef
])
8681 error ("%<constexpr%> cannot appear in a typedef declaration");
8682 return error_mark_node
;
8685 /* If there were multiple types specified in the decl-specifier-seq,
8686 issue an error message. */
8687 if (declspecs
->multiple_types_p
)
8689 error ("two or more data types in declaration of %qs", name
);
8690 return error_mark_node
;
8693 if (declspecs
->conflicting_specifiers_p
)
8695 error ("conflicting specifiers in declaration of %qs", name
);
8696 return error_mark_node
;
8699 /* Extract the basic type from the decl-specifier-seq. */
8700 type
= declspecs
->type
;
8701 if (type
== error_mark_node
)
8704 type_was_error_mark_node
= true;
8706 /* If the entire declaration is itself tagged as deprecated then
8707 suppress reports of deprecated items. */
8708 if (type
&& TREE_DEPRECATED (type
)
8709 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8710 warn_deprecated_use (type
, NULL_TREE
);
8711 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8713 typedef_decl
= type
;
8714 type
= TREE_TYPE (typedef_decl
);
8715 if (TREE_DEPRECATED (type
)
8716 && DECL_ARTIFICIAL (typedef_decl
)
8717 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8718 warn_deprecated_use (type
, NULL_TREE
);
8720 /* No type at all: default to `int', and set DEFAULTED_INT
8721 because it was not a user-defined typedef. */
8722 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8724 /* These imply 'int'. */
8725 type
= integer_type_node
;
8729 explicit_int
= declspecs
->explicit_int_p
;
8730 explicit_char
= declspecs
->explicit_char_p
;
8733 /* See the code below that used this. */
8735 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8737 typedef_type
= type
;
8740 if (sfk
!= sfk_conversion
)
8741 ctor_return_type
= ctype
;
8743 if (sfk
!= sfk_none
)
8744 type
= check_special_function_return_type (sfk
, type
,
8746 else if (type
== NULL_TREE
)
8752 /* We handle `main' specially here, because 'main () { }' is so
8753 common. With no options, it is allowed. With -Wreturn-type,
8754 it is a warning. It is only an error with -pedantic-errors. */
8755 is_main
= (funcdef_flag
8756 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8757 && MAIN_NAME_P (dname
)
8758 && ctype
== NULL_TREE
8759 && in_namespace
== NULL_TREE
8760 && current_namespace
== global_namespace
);
8762 if (type_was_error_mark_node
)
8763 /* We've already issued an error, don't complain more. */;
8764 else if (in_system_header
|| flag_ms_extensions
)
8765 /* Allow it, sigh. */;
8767 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8769 pedwarn (input_location
, OPT_pedantic
,
8770 "ISO C++ forbids declaration of %qs with no type", name
);
8772 warning (OPT_Wreturn_type
,
8773 "ISO C++ forbids declaration of %qs with no type", name
);
8775 type
= integer_type_node
;
8780 if (explicit_int128
)
8782 if (int128_integer_type_node
== NULL_TREE
)
8784 error ("%<__int128%> is not supported by this target");
8785 explicit_int128
= false;
8787 else if (pedantic
&& ! in_system_header
)
8788 pedwarn (input_location
, OPT_pedantic
,
8789 "ISO C++ does not support %<__int128%> for %qs", name
);
8792 /* Now process the modifiers that were specified
8793 and check for invalid combinations. */
8795 /* Long double is a special combination. */
8796 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8799 type
= cp_build_qualified_type (long_double_type_node
,
8800 cp_type_quals (type
));
8803 /* Check all other uses of type modifiers. */
8805 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8809 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8810 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8811 else if (signed_p
&& unsigned_p
)
8812 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8813 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8814 error ("%<long long%> invalid for %qs", name
);
8815 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8816 error ("%<long%> invalid for %qs", name
);
8817 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8818 error ("%<short%> invalid for %qs", name
);
8819 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8820 error ("%<long%> or %<short%> invalid for %qs", name
);
8821 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8822 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8823 else if ((long_p
|| short_p
) && explicit_char
)
8824 error ("%<long%> or %<short%> specified with char for %qs", name
);
8825 else if (long_p
&& short_p
)
8826 error ("%<long%> and %<short%> specified together for %qs", name
);
8827 else if (type
== char16_type_node
|| type
== char32_type_node
)
8829 if (signed_p
|| unsigned_p
)
8830 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8831 else if (short_p
|| long_p
)
8832 error ("%<short%> or %<long%> invalid for %qs", name
);
8837 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8839 pedwarn (input_location
, OPT_pedantic
,
8840 "long, short, signed or unsigned used invalidly for %qs",
8842 if (flag_pedantic_errors
)
8847 /* Discard the type modifiers if they are invalid. */
8858 /* Decide whether an integer type is signed or not.
8859 Optionally treat bitfields as signed by default. */
8863 It is implementation-defined whether a plain (neither
8864 explicitly signed or unsigned) char, short, int, or long
8865 bit-field is signed or unsigned.
8867 Naturally, we extend this to long long as well. Note that
8868 this does not include wchar_t. */
8869 || (bitfield
&& !flag_signed_bitfields
8871 /* A typedef for plain `int' without `signed' can be
8872 controlled just like plain `int', but a typedef for
8873 `signed int' cannot be so controlled. */
8875 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8876 && TREE_CODE (type
) == INTEGER_TYPE
8877 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8879 if (explicit_int128
)
8880 type
= int128_unsigned_type_node
;
8882 type
= long_long_unsigned_type_node
;
8884 type
= long_unsigned_type_node
;
8886 type
= short_unsigned_type_node
;
8887 else if (type
== char_type_node
)
8888 type
= unsigned_char_type_node
;
8889 else if (typedef_decl
)
8890 type
= unsigned_type_for (type
);
8892 type
= unsigned_type_node
;
8894 else if (signed_p
&& type
== char_type_node
)
8895 type
= signed_char_type_node
;
8896 else if (explicit_int128
)
8897 type
= int128_integer_type_node
;
8899 type
= long_long_integer_type_node
;
8901 type
= long_integer_type_node
;
8903 type
= short_integer_type_node
;
8905 if (declspecs
->specs
[(int)ds_complex
])
8907 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8908 error ("complex invalid for %qs", name
);
8909 /* If we just have "complex", it is equivalent to
8910 "complex double", but if any modifiers at all are specified it is
8911 the complex form of TYPE. E.g, "complex short" is
8912 "complex short int". */
8913 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8914 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8915 type
= complex_double_type_node
;
8916 else if (type
== integer_type_node
)
8917 type
= complex_integer_type_node
;
8918 else if (type
== float_type_node
)
8919 type
= complex_float_type_node
;
8920 else if (type
== double_type_node
)
8921 type
= complex_double_type_node
;
8922 else if (type
== long_double_type_node
)
8923 type
= complex_long_double_type_node
;
8925 type
= build_complex_type (type
);
8928 type_quals
= TYPE_UNQUALIFIED
;
8929 if (declspecs
->specs
[(int)ds_const
])
8930 type_quals
|= TYPE_QUAL_CONST
;
8931 if (declspecs
->specs
[(int)ds_volatile
])
8932 type_quals
|= TYPE_QUAL_VOLATILE
;
8933 if (declspecs
->specs
[(int)ds_restrict
])
8934 type_quals
|= TYPE_QUAL_RESTRICT
;
8935 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8936 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8939 type_quals
|= cp_type_quals (type
);
8940 type
= cp_build_qualified_type_real
8941 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8942 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8943 /* We might have ignored or rejected some of the qualifiers. */
8944 type_quals
= cp_type_quals (type
);
8947 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8948 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8949 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8951 storage_class
= declspecs
->storage_class
;
8952 if (storage_class
== sc_static
)
8953 staticp
= 1 + (decl_context
== FIELD
);
8955 if (virtualp
&& staticp
== 2)
8957 error ("member %qD cannot be declared both virtual and static", dname
);
8958 storage_class
= sc_none
;
8961 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8963 if (dependent_name
&& !friendp
)
8965 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8966 return error_mark_node
;
8969 /* Issue errors about use of storage classes for parameters. */
8970 if (decl_context
== PARM
)
8972 if (declspecs
->specs
[(int)ds_typedef
])
8974 error ("typedef declaration invalid in parameter declaration");
8975 return error_mark_node
;
8977 else if (template_parm_flag
&& storage_class
!= sc_none
)
8979 error ("storage class specified for template parameter %qs", name
);
8980 return error_mark_node
;
8982 else if (storage_class
== sc_static
8983 || storage_class
== sc_extern
8985 error ("storage class specifiers invalid in parameter declarations");
8987 /* Function parameters cannot be constexpr. If we saw one, moan
8988 and pretend it wasn't there. */
8991 error ("a parameter cannot be declared %<constexpr%>");
8996 /* Give error if `virtual' is used outside of class declaration. */
8998 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9000 error ("%<virtual%> outside class declaration");
9004 /* Static anonymous unions are dealt with here. */
9005 if (staticp
&& decl_context
== TYPENAME
9007 && ANON_AGGR_TYPE_P (declspecs
->type
))
9008 decl_context
= FIELD
;
9010 /* Warn about storage classes that are invalid for certain
9011 kinds of declarations (parameters, typenames, etc.). */
9014 && storage_class
!= sc_extern
9015 && storage_class
!= sc_static
)
9016 || declspecs
->specs
[(int)ds_typedef
]))
9018 error ("multiple storage classes in declaration of %qs", name
);
9021 if (decl_context
!= NORMAL
9022 && ((storage_class
!= sc_none
9023 && storage_class
!= sc_mutable
)
9026 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9027 && (storage_class
== sc_register
9028 || storage_class
== sc_auto
))
9030 else if (declspecs
->specs
[(int)ds_typedef
])
9032 else if (decl_context
== FIELD
9033 /* C++ allows static class elements. */
9034 && storage_class
== sc_static
)
9035 /* C++ also allows inlines and signed and unsigned elements,
9036 but in those cases we don't come in here. */
9040 if (decl_context
== FIELD
)
9041 error ("storage class specified for %qs", name
);
9044 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9045 error ("storage class specified for parameter %qs", name
);
9047 error ("storage class specified for typename");
9049 if (storage_class
== sc_register
9050 || storage_class
== sc_auto
9051 || storage_class
== sc_extern
9053 storage_class
= sc_none
;
9056 else if (storage_class
== sc_extern
&& funcdef_flag
9057 && ! toplevel_bindings_p ())
9058 error ("nested function %qs declared %<extern%>", name
);
9059 else if (toplevel_bindings_p ())
9061 if (storage_class
== sc_auto
)
9062 error ("top-level declaration of %qs specifies %<auto%>", name
);
9065 && storage_class
!= sc_extern
9066 && storage_class
!= sc_static
)
9068 error ("function-scope %qs implicitly auto and declared %<__thread%>",
9073 if (storage_class
&& friendp
)
9075 error ("storage class specifiers invalid in friend function declarations");
9076 storage_class
= sc_none
;
9081 unqualified_id
= NULL_TREE
;
9084 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9085 switch (TREE_CODE (unqualified_id
))
9088 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9089 if (TYPE_P (unqualified_id
))
9090 unqualified_id
= constructor_name (unqualified_id
);
9093 case IDENTIFIER_NODE
:
9094 case TEMPLATE_ID_EXPR
:
9102 /* Determine the type of the entity declared by recurring on the
9104 for (; declarator
; declarator
= declarator
->declarator
)
9106 const cp_declarator
*inner_declarator
;
9109 if (type
== error_mark_node
)
9110 return error_mark_node
;
9112 attrs
= declarator
->attributes
;
9118 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9119 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9120 if (declarator
->kind
== cdk_function
)
9121 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9122 if (declarator
->kind
== cdk_array
)
9123 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9124 returned_attrs
= decl_attributes (&type
,
9125 chainon (returned_attrs
, attrs
),
9129 if (declarator
->kind
== cdk_id
)
9132 inner_declarator
= declarator
->declarator
;
9134 switch (declarator
->kind
)
9137 type
= create_array_type_for_decl (dname
, type
,
9138 declarator
->u
.array
.bounds
);
9146 /* Declaring a function type.
9147 Make sure we have a valid type for the function to return. */
9149 if (type_quals
!= TYPE_UNQUALIFIED
)
9151 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9152 warning (OPT_Wignored_qualifiers
,
9153 "type qualifiers ignored on function return type");
9154 /* We now know that the TYPE_QUALS don't apply to the
9155 decl, but to its return type. */
9156 type_quals
= TYPE_UNQUALIFIED
;
9158 errmsg
= targetm
.invalid_return_type (type
);
9162 type
= integer_type_node
;
9165 /* Error about some types functions can't return. */
9167 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9169 error ("%qs declared as function returning a function", name
);
9170 return error_mark_node
;
9172 if (TREE_CODE (type
) == ARRAY_TYPE
)
9174 error ("%qs declared as function returning an array", name
);
9175 return error_mark_node
;
9178 /* Pick up type qualifiers which should be applied to `this'. */
9179 memfn_quals
= declarator
->u
.function
.qualifiers
;
9180 /* Pick up virt-specifiers. */
9181 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9182 /* Pick up the exception specifications. */
9183 raises
= declarator
->u
.function
.exception_specification
;
9184 /* If the exception-specification is ill-formed, let's pretend
9185 there wasn't one. */
9186 if (raises
== error_mark_node
)
9189 /* Say it's a definition only for the CALL_EXPR
9190 closest to the identifier. */
9191 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9193 /* Handle a late-specified return type. */
9196 if (type_uses_auto (type
))
9198 if (!declarator
->u
.function
.late_return_type
)
9200 if (current_class_type
9201 && LAMBDA_TYPE_P (current_class_type
))
9202 /* OK for C++11 lambdas. */;
9203 else if (cxx_dialect
< cxx1y
)
9204 pedwarn (input_location
, 0, "%qs function uses "
9205 "%<auto%> type specifier without trailing "
9206 "return type", name
);
9208 else if (!is_auto (type
))
9210 error ("%qs function with trailing return type has"
9211 " %qT as its type rather than plain %<auto%>",
9213 return error_mark_node
;
9216 else if (declarator
->u
.function
.late_return_type
)
9218 if (cxx_dialect
< cxx0x
)
9219 /* Not using maybe_warn_cpp0x because this should
9220 always be an error. */
9221 error ("trailing return type only available with "
9222 "-std=c++11 or -std=gnu++11");
9224 error ("%qs function with trailing return type not "
9225 "declared with %<auto%> type specifier", name
);
9226 return error_mark_node
;
9229 type
= splice_late_return_type
9230 (type
, declarator
->u
.function
.late_return_type
);
9231 if (type
== error_mark_node
)
9232 return error_mark_node
;
9234 if (ctype
== NULL_TREE
9235 && decl_context
== FIELD
9237 && (friendp
== 0 || dname
== current_class_name
))
9238 ctype
= current_class_type
;
9240 if (ctype
&& (sfk
== sfk_constructor
9241 || sfk
== sfk_destructor
))
9243 /* We are within a class's scope. If our declarator name
9244 is the same as the class name, and we are defining
9245 a function, then it is a constructor/destructor, and
9246 therefore returns a void type. */
9248 /* ISO C++ 12.4/2. A destructor may not be declared
9249 const or volatile. A destructor may not be
9252 ISO C++ 12.1. A constructor may not be declared
9253 const or volatile. A constructor may not be
9254 virtual. A constructor may not be static. */
9256 error ((flags
== DTOR_FLAG
)
9257 ? G_("destructor cannot be static member function")
9258 : G_("constructor cannot be static member function"));
9261 error ((flags
== DTOR_FLAG
)
9262 ? G_("destructors may not be cv-qualified")
9263 : G_("constructors may not be cv-qualified"));
9264 memfn_quals
= TYPE_UNQUALIFIED
;
9267 if (decl_context
== FIELD
9268 && !member_function_or_else (ctype
,
9271 return error_mark_node
;
9273 if (flags
!= DTOR_FLAG
)
9275 /* It's a constructor. */
9280 permerror (input_location
, "constructors cannot be declared virtual");
9283 if (decl_context
== FIELD
9284 && sfk
!= sfk_constructor
)
9285 return error_mark_node
;
9287 if (decl_context
== FIELD
)
9293 error ("can%'t initialize friend function %qs", name
);
9296 /* Cannot be both friend and virtual. */
9297 error ("virtual functions cannot be friends");
9300 if (decl_context
== NORMAL
)
9301 error ("friend declaration not in class definition");
9302 if (current_function_decl
&& funcdef_flag
)
9303 error ("can%'t define friend function %qs in a local "
9307 else if (ctype
&& sfk
== sfk_conversion
)
9311 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9316 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9319 if (inner_declarator
9320 && inner_declarator
->kind
== cdk_id
9321 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9322 && arg_types
!= void_list_node
)
9324 error ("destructors may not have parameters");
9325 arg_types
= void_list_node
;
9329 type
= build_function_type (type
, arg_types
);
9336 /* Filter out pointers-to-references and references-to-references.
9337 We can get these if a TYPE_DECL is used. */
9339 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9341 if (declarator
->kind
!= cdk_reference
)
9343 error ("cannot declare pointer to %q#T", type
);
9344 type
= TREE_TYPE (type
);
9347 /* In C++0x, we allow reference to reference declarations
9348 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9349 and template type arguments [14.3.1/4 temp.arg.type]. The
9350 check for direct reference to reference declarations, which
9351 are still forbidden, occurs below. Reasoning behind the change
9352 can be found in DR106, DR540, and the rvalue reference
9354 else if (cxx_dialect
== cxx98
)
9356 error ("cannot declare reference to %q#T", type
);
9357 type
= TREE_TYPE (type
);
9360 else if (VOID_TYPE_P (type
))
9362 if (declarator
->kind
== cdk_reference
)
9363 error ("cannot declare reference to %q#T", type
);
9364 else if (declarator
->kind
== cdk_ptrmem
)
9365 error ("cannot declare pointer to %q#T member", type
);
9368 /* We now know that the TYPE_QUALS don't apply to the decl,
9369 but to the target of the pointer. */
9370 type_quals
= TYPE_UNQUALIFIED
;
9372 if (declarator
->kind
== cdk_ptrmem
9373 && (TREE_CODE (type
) == FUNCTION_TYPE
9374 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9376 memfn_quals
|= type_memfn_quals (type
);
9377 type
= build_memfn_type (type
,
9378 declarator
->u
.pointer
.class_type
,
9380 if (type
== error_mark_node
)
9381 return error_mark_node
;
9382 memfn_quals
= TYPE_UNQUALIFIED
;
9385 if (TREE_CODE (type
) == FUNCTION_TYPE
9386 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9387 error (declarator
->kind
== cdk_reference
9388 ? G_("cannot declare reference to qualified function type %qT")
9389 : G_("cannot declare pointer to qualified function type %qT"),
9392 /* When the pointed-to type involves components of variable size,
9393 care must be taken to ensure that the size evaluation code is
9394 emitted early enough to dominate all the possible later uses
9395 and late enough for the variables on which it depends to have
9398 This is expected to happen automatically when the pointed-to
9399 type has a name/declaration of it's own, but special attention
9400 is required if the type is anonymous.
9402 We handle the NORMAL and FIELD contexts here by inserting a
9403 dummy statement that just evaluates the size at a safe point
9404 and ensures it is not deferred until e.g. within a deeper
9405 conditional context (c++/43555).
9407 We expect nothing to be needed here for PARM or TYPENAME.
9408 Evaluating the size at this point for TYPENAME would
9409 actually be incorrect, as we might be in the middle of an
9410 expression with side effects on the pointed-to type size
9411 "arguments" prior to the pointer declaration point and the
9412 size evaluation could end up prior to the side effects. */
9414 if (!TYPE_NAME (type
)
9415 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9416 && at_function_scope_p ()
9417 && variably_modified_type_p (type
, NULL_TREE
))
9419 /* First break out any side-effects. */
9420 stabilize_vla_size (TYPE_SIZE (type
));
9421 /* And then force evaluation of the SAVE_EXPR. */
9422 finish_expr_stmt (TYPE_SIZE (type
));
9425 if (declarator
->kind
== cdk_reference
)
9427 /* In C++0x, the type we are creating a reference to might be
9428 a typedef which is itself a reference type. In that case,
9429 we follow the reference collapsing rules in
9430 [7.1.3/8 dcl.typedef] to create the final reference type:
9432 "If a typedef TD names a type that is a reference to a type
9433 T, an attempt to create the type 'lvalue reference to cv TD'
9434 creates the type 'lvalue reference to T,' while an attempt
9435 to create the type "rvalue reference to cv TD' creates the
9438 if (VOID_TYPE_P (type
))
9439 /* We already gave an error. */;
9440 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9442 if (declarator
->u
.reference
.rvalue_ref
)
9443 /* Leave type alone. */;
9445 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9448 type
= cp_build_reference_type
9449 (type
, declarator
->u
.reference
.rvalue_ref
);
9451 /* In C++0x, we need this check for direct reference to
9452 reference declarations, which are forbidden by
9453 [8.3.2/5 dcl.ref]. Reference to reference declarations
9454 are only allowed indirectly through typedefs and template
9455 type arguments. Example:
9457 void foo(int & &); // invalid ref-to-ref decl
9459 typedef int & int_ref;
9460 void foo(int_ref &); // valid ref-to-ref decl
9462 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9463 error ("cannot declare reference to %q#T, which is not "
9464 "a typedef or a template type argument", type
);
9466 else if (TREE_CODE (type
) == METHOD_TYPE
)
9467 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9468 else if (declarator
->kind
== cdk_ptrmem
)
9470 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9472 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9473 /* We will already have complained. */
9474 type
= error_mark_node
;
9476 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9480 type
= build_pointer_type (type
);
9482 /* Process a list of type modifier keywords (such as
9483 const or volatile) that were given inside the `*' or `&'. */
9485 if (declarator
->u
.pointer
.qualifiers
)
9488 = cp_build_qualified_type (type
,
9489 declarator
->u
.pointer
.qualifiers
);
9490 type_quals
= cp_type_quals (type
);
9503 /* We need to stabilize side-effects in VLA sizes for regular array
9504 declarations too, not just pointers to arrays. */
9505 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9506 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9507 && at_function_scope_p ()
9508 && variably_modified_type_p (type
, NULL_TREE
))
9509 stabilize_vla_size (TYPE_SIZE (type
));
9511 /* A `constexpr' specifier used in an object declaration declares
9512 the object as `const'. */
9513 if (constexpr_p
&& innermost_code
!= cdk_function
)
9515 if (type_quals
& TYPE_QUAL_CONST
)
9516 error ("both %<const%> and %<constexpr%> cannot be used here");
9517 if (type_quals
& TYPE_QUAL_VOLATILE
)
9518 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9519 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9521 type_quals
|= TYPE_QUAL_CONST
;
9522 type
= cp_build_qualified_type (type
, type_quals
);
9526 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9527 && TREE_CODE (type
) != FUNCTION_TYPE
9528 && TREE_CODE (type
) != METHOD_TYPE
)
9530 error ("template-id %qD used as a declarator",
9532 unqualified_id
= dname
;
9535 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9536 qualified with a class-name, turn it into a METHOD_TYPE, unless
9537 we know that the function is static. We take advantage of this
9538 opportunity to do other processing that pertains to entities
9539 explicitly declared to be class members. Note that if DECLARATOR
9540 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9541 would not have exited the loop above. */
9543 && declarator
->u
.id
.qualifying_scope
9544 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9548 ctype
= declarator
->u
.id
.qualifying_scope
;
9549 ctype
= TYPE_MAIN_VARIANT (ctype
);
9551 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
9553 /* You're supposed to have one `template <...>' for every
9554 template class, but you don't need one for a full
9555 specialization. For example:
9557 template <class T> struct S{};
9558 template <> struct S<int> { void f(); };
9559 void S<int>::f () {}
9561 is correct; there shouldn't be a `template <>' for the
9562 definition of `S<int>::f'. */
9563 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
9564 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
9565 /* T is an explicit (not partial) specialization. All
9566 containing classes must therefore also be explicitly
9569 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
9570 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
9571 template_count
+= 1;
9573 t
= TYPE_MAIN_DECL (t
);
9574 t
= DECL_CONTEXT (t
);
9577 if (ctype
== current_class_type
)
9581 permerror (input_location
, "member functions are implicitly friends of their class");
9585 permerror (declarator
->id_loc
,
9586 "extra qualification %<%T::%> on member %qs",
9589 else if (/* If the qualifying type is already complete, then we
9590 can skip the following checks. */
9591 !COMPLETE_TYPE_P (ctype
)
9592 && (/* If the function is being defined, then
9593 qualifying type must certainly be complete. */
9595 /* A friend declaration of "T::f" is OK, even if
9596 "T" is a template parameter. But, if this
9597 function is not a friend, the qualifying type
9599 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9600 /* For a declaration, the type need not be
9601 complete, if either it is dependent (since there
9602 is no meaningful definition of complete in that
9603 case) or the qualifying class is currently being
9605 || !(dependent_type_p (ctype
)
9606 || currently_open_class (ctype
)))
9607 /* Check that the qualifying type is complete. */
9608 && !complete_type_or_else (ctype
, NULL_TREE
))
9609 return error_mark_node
;
9610 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9612 if (current_class_type
9613 && (!friendp
|| funcdef_flag
))
9616 ? G_("cannot define member function %<%T::%s%> "
9618 : G_("cannot declare member function %<%T::%s%> "
9620 ctype
, name
, current_class_type
);
9621 return error_mark_node
;
9624 else if (declspecs
->specs
[(int)ds_typedef
]
9625 && current_class_type
)
9627 error ("cannot declare member %<%T::%s%> within %qT",
9628 ctype
, name
, current_class_type
);
9629 return error_mark_node
;
9633 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9634 ctype
= current_class_type
;
9636 /* Now TYPE has the actual type. */
9641 *attrlist
= chainon (returned_attrs
, *attrlist
);
9643 attrlist
= &returned_attrs
;
9646 /* Handle parameter packs. */
9647 if (parameter_pack_p
)
9649 if (decl_context
== PARM
)
9650 /* Turn the type into a pack expansion.*/
9651 type
= make_pack_expansion (type
);
9653 error ("non-parameter %qs cannot be a parameter pack", name
);
9656 /* Did array size calculations overflow? */
9658 if (TREE_CODE (type
) == ARRAY_TYPE
9659 && COMPLETE_TYPE_P (type
)
9660 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9661 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
9663 error ("size of array %qs is too large", name
);
9664 /* If we proceed with the array type as it is, we'll eventually
9665 crash in tree_low_cst(). */
9666 type
= error_mark_node
;
9669 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9670 && !processing_template_decl
9671 && variably_modified_type_p (type
, NULL_TREE
))
9673 if (decl_context
== FIELD
)
9674 error ("data member may not have variably modified type %qT", type
);
9676 error ("parameter may not have variably modified type %qT", type
);
9677 type
= error_mark_node
;
9680 if (explicitp
== 1 || (explicitp
&& friendp
))
9682 /* [dcl.fct.spec] The explicit specifier shall only be used in
9683 declarations of constructors within a class definition. */
9684 error ("only declarations of constructors can be %<explicit%>");
9688 if (storage_class
== sc_mutable
)
9690 if (decl_context
!= FIELD
|| friendp
)
9692 error ("non-member %qs cannot be declared %<mutable%>", name
);
9693 storage_class
= sc_none
;
9695 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9697 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9698 storage_class
= sc_none
;
9700 else if (TREE_CODE (type
) == FUNCTION_TYPE
9701 || TREE_CODE (type
) == METHOD_TYPE
)
9703 error ("function %qs cannot be declared %<mutable%>", name
);
9704 storage_class
= sc_none
;
9708 error ("static %qs cannot be declared %<mutable%>", name
);
9709 storage_class
= sc_none
;
9711 else if (type_quals
& TYPE_QUAL_CONST
)
9713 error ("const %qs cannot be declared %<mutable%>", name
);
9714 storage_class
= sc_none
;
9716 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9718 permerror (input_location
, "reference %qs cannot be declared "
9719 "%<mutable%>", name
);
9720 storage_class
= sc_none
;
9724 /* If this is declaring a typedef name, return a TYPE_DECL. */
9725 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9729 /* Note that the grammar rejects storage classes
9730 in typenames, fields or parameters. */
9731 if (current_lang_name
== lang_name_java
)
9732 TYPE_FOR_JAVA (type
) = 1;
9734 /* This declaration:
9736 typedef void f(int) const;
9738 declares a function type which is not a member of any
9739 particular class, but which is cv-qualified; for
9740 example "f S::*" declares a pointer to a const-qualified
9741 member function of S. We record the cv-qualification in the
9743 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9745 type
= apply_memfn_quals (type
, memfn_quals
);
9747 /* We have now dealt with these qualifiers. */
9748 memfn_quals
= TYPE_UNQUALIFIED
;
9751 if (type_uses_auto (type
))
9753 error ("typedef declared %<auto%>");
9754 type
= error_mark_node
;
9757 if (decl_context
== FIELD
)
9758 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9760 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9761 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9762 error_at (DECL_SOURCE_LOCATION (decl
),
9763 "typedef name may not be a nested-name-specifier");
9764 TREE_TYPE (decl
) = error_mark_node
;
9767 if (decl_context
!= FIELD
)
9769 if (!current_function_decl
)
9770 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9771 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9772 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9773 (current_function_decl
)))
9774 /* The TYPE_DECL is "abstract" because there will be
9775 clones of this constructor/destructor, and there will
9776 be copies of this TYPE_DECL generated in those
9778 DECL_ABSTRACT (decl
) = 1;
9780 else if (constructor_name_p (unqualified_id
, current_class_type
))
9781 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9782 "as enclosing class",
9785 /* If the user declares "typedef struct {...} foo" then the
9786 struct will have an anonymous name. Fill that name in now.
9787 Nothing can refer to it, so nothing needs know about the name
9789 if (type
!= error_mark_node
9792 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9793 && TYPE_ANONYMOUS_P (type
)
9794 && declspecs
->type_definition_p
9795 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9799 /* Replace the anonymous name with the real name everywhere. */
9800 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9802 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9803 /* We do not rename the debug info representing the
9804 anonymous tagged type because the standard says in
9805 [dcl.typedef] that the naming applies only for
9806 linkage purposes. */
9807 /*debug_hooks->set_name (t, decl);*/
9808 TYPE_NAME (t
) = decl
;
9811 if (TYPE_LANG_SPECIFIC (type
))
9812 TYPE_WAS_ANONYMOUS (type
) = 1;
9814 /* If this is a typedef within a template class, the nested
9815 type is a (non-primary) template. The name for the
9816 template needs updating as well. */
9817 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9818 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9819 = TYPE_IDENTIFIER (type
);
9821 /* Adjust linkage now that we aren't anonymous anymore. */
9822 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9823 determine_visibility (TYPE_MAIN_DECL (type
));
9825 /* FIXME remangle member functions; member functions of a
9826 type with external linkage have external linkage. */
9830 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9831 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9833 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
9834 memfn_quals
!= TYPE_UNQUALIFIED
,
9835 inlinep
, friendp
, raises
!= NULL_TREE
);
9837 if (declspecs
->specs
[(int)ds_alias
])
9838 /* Acknowledge that this was written:
9839 `using analias = atype;'. */
9840 TYPE_DECL_ALIAS_P (decl
) = 1;
9845 /* Detect the case of an array type of unspecified size
9846 which came, as such, direct from a typedef name.
9847 We must copy the type, so that the array's domain can be
9848 individually set by the object's initializer. */
9850 if (type
&& typedef_type
9851 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9852 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9853 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9855 /* Detect where we're using a typedef of function type to declare a
9856 function. PARMS will not be set, so we must create it now. */
9858 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9860 tree decls
= NULL_TREE
;
9863 for (args
= TYPE_ARG_TYPES (type
);
9864 args
&& args
!= void_list_node
;
9865 args
= TREE_CHAIN (args
))
9867 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9869 DECL_CHAIN (decl
) = decls
;
9873 parms
= nreverse (decls
);
9875 if (decl_context
!= TYPENAME
)
9877 /* A cv-qualifier-seq shall only be part of the function type
9878 for a non-static member function. [8.3.5/4 dcl.fct] */
9879 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9880 && (current_class_type
== NULL_TREE
|| staticp
) )
9883 ? G_("qualified function types cannot be used to "
9884 "declare static member functions")
9885 : G_("qualified function types cannot be used to "
9886 "declare free functions"));
9887 type
= TYPE_MAIN_VARIANT (type
);
9890 /* The qualifiers on the function type become the qualifiers on
9891 the non-static member function. */
9892 memfn_quals
|= type_memfn_quals (type
);
9893 type_quals
= TYPE_UNQUALIFIED
;
9897 /* If this is a type name (such as, in a cast or sizeof),
9898 compute the type and return it now. */
9900 if (decl_context
== TYPENAME
)
9902 /* Note that the grammar rejects storage classes
9903 in typenames, fields or parameters. */
9904 if (type_quals
!= TYPE_UNQUALIFIED
)
9905 type_quals
= TYPE_UNQUALIFIED
;
9907 /* Special case: "friend class foo" looks like a TYPENAME context. */
9910 if (type_quals
!= TYPE_UNQUALIFIED
)
9912 error ("type qualifiers specified for friend class declaration");
9913 type_quals
= TYPE_UNQUALIFIED
;
9917 error ("%<inline%> specified for friend class declaration");
9923 /* Don't allow friend declaration without a class-key. */
9924 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9925 permerror (input_location
, "template parameters cannot be friends");
9926 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9927 permerror (input_location
, "friend declaration requires class-key, "
9928 "i.e. %<friend class %T::%D%>",
9929 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9931 permerror (input_location
, "friend declaration requires class-key, "
9932 "i.e. %<friend %#T%>",
9936 /* Only try to do this stuff if we didn't already give up. */
9937 if (type
!= integer_type_node
)
9939 /* A friendly class? */
9940 if (current_class_type
)
9941 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9944 error ("trying to make class %qT a friend of global scope",
9947 type
= void_type_node
;
9950 else if (memfn_quals
)
9952 if (ctype
== NULL_TREE
9953 && TREE_CODE (type
) == METHOD_TYPE
)
9954 ctype
= TYPE_METHOD_BASETYPE (type
);
9957 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9958 /* Core issue #547: need to allow this in template type args. */
9959 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9960 type
= apply_memfn_quals (type
, memfn_quals
);
9962 error ("invalid qualifiers on non-member function type");
9967 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9968 && decl_context
!= CATCHPARM
9969 && TREE_CODE (type
) != UNION_TYPE
9972 error ("abstract declarator %qT used as declaration", type
);
9973 return error_mark_node
;
9976 /* Only functions may be declared using an operator-function-id. */
9978 && IDENTIFIER_OPNAME_P (unqualified_id
)
9979 && TREE_CODE (type
) != FUNCTION_TYPE
9980 && TREE_CODE (type
) != METHOD_TYPE
)
9982 error ("declaration of %qD as non-function", unqualified_id
);
9983 return error_mark_node
;
9986 /* We don't check parameter types here because we can emit a better
9987 error message later. */
9988 if (decl_context
!= PARM
)
9990 type
= check_var_type (unqualified_id
, type
);
9991 if (type
== error_mark_node
)
9992 return error_mark_node
;
9995 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9996 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9998 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10000 if (ctype
|| in_namespace
)
10001 error ("cannot use %<::%> in parameter declaration");
10003 if (type_uses_auto (type
))
10005 error ("parameter declared %<auto%>");
10006 type
= error_mark_node
;
10009 /* A parameter declared as an array of T is really a pointer to T.
10010 One declared as a function is really a pointer to a function.
10011 One declared as a member is really a pointer to member. */
10013 if (TREE_CODE (type
) == ARRAY_TYPE
)
10015 /* Transfer const-ness of array into that of type pointed to. */
10016 type
= build_pointer_type (TREE_TYPE (type
));
10017 type_quals
= TYPE_UNQUALIFIED
;
10019 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10020 type
= build_pointer_type (type
);
10023 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10024 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10026 cp_cv_quals real_quals
= memfn_quals
;
10027 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10028 real_quals
|= TYPE_QUAL_CONST
;
10029 type
= build_memfn_type (type
, ctype
, real_quals
);
10035 if (decl_context
== PARM
)
10037 decl
= cp_build_parm_decl (unqualified_id
, type
);
10039 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10040 memfn_quals
!= TYPE_UNQUALIFIED
,
10041 inlinep
, friendp
, raises
!= NULL_TREE
);
10043 else if (decl_context
== FIELD
)
10045 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10046 && type_uses_auto (type
))
10048 error ("non-static data member declared %<auto%>");
10049 type
= error_mark_node
;
10052 /* The C99 flexible array extension. */
10053 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10054 && TYPE_DOMAIN (type
) == NULL_TREE
)
10056 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10057 tf_warning_or_error
);
10058 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10061 if (type
== error_mark_node
)
10063 /* Happens when declaring arrays of sizes which
10064 are error_mark_node, for example. */
10067 else if (in_namespace
&& !friendp
)
10069 /* Something like struct S { int N::j; }; */
10070 error ("invalid use of %<::%>");
10071 return error_mark_node
;
10073 else if (TREE_CODE (type
) == FUNCTION_TYPE
10074 || TREE_CODE (type
) == METHOD_TYPE
)
10077 tree function_context
;
10081 /* This should never happen in pure C++ (the check
10082 could be an assert). It could happen in
10083 Objective-C++ if someone writes invalid code that
10084 uses a function declaration for an instance
10085 variable or property (instance variables and
10086 properties are parsed as FIELD_DECLs, but they are
10087 part of an Objective-C class, not a C++ class).
10088 That code is invalid and is caught by this
10092 error ("declaration of function %qD in invalid context",
10094 return error_mark_node
;
10097 /* ``A union may [ ... ] not [ have ] virtual functions.''
10099 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10101 error ("function %qD declared virtual inside a union",
10103 return error_mark_node
;
10106 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10110 error ("%qD cannot be declared virtual, since it "
10111 "is always static",
10118 /* Check that the name used for a destructor makes sense. */
10119 if (sfk
== sfk_destructor
)
10121 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10125 gcc_assert (friendp
);
10126 error ("expected qualified name in friend declaration "
10127 "for destructor %qD", uqname
);
10128 return error_mark_node
;
10131 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10133 error ("declaration of %qD as member of %qT",
10135 return error_mark_node
;
10139 error ("a destructor cannot be %<constexpr%>");
10140 return error_mark_node
;
10143 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10145 error ("expected qualified name in friend declaration "
10146 "for constructor %qD",
10147 id_declarator
->u
.id
.unqualified_name
);
10148 return error_mark_node
;
10151 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10152 function_context
= (ctype
!= NULL_TREE
) ?
10153 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10154 publicp
= (! friendp
|| ! staticp
)
10155 && function_context
== NULL_TREE
;
10156 decl
= grokfndecl (ctype
, type
,
10157 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10158 ? unqualified_id
: dname
,
10161 virtualp
, flags
, memfn_quals
, raises
,
10162 friendp
? -1 : 0, friendp
, publicp
,
10163 inlinep
| (2 * constexpr_p
),
10165 funcdef_flag
, template_count
, in_namespace
,
10166 attrlist
, declarator
->id_loc
);
10167 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10168 if (decl
== NULL_TREE
)
10169 return error_mark_node
;
10171 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10172 /* The decl and setting of decl_attr is also turned off. */
10173 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10176 /* [class.conv.ctor]
10178 A constructor declared without the function-specifier
10179 explicit that can be called with a single parameter
10180 specifies a conversion from the type of its first
10181 parameter to the type of its class. Such a constructor
10182 is called a converting constructor. */
10183 if (explicitp
== 2)
10184 DECL_NONCONVERTING_P (decl
) = 1;
10186 else if (!staticp
&& !dependent_type_p (type
)
10187 && !COMPLETE_TYPE_P (complete_type (type
))
10188 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10190 if (unqualified_id
)
10191 error ("field %qD has incomplete type", unqualified_id
);
10193 error ("name %qT has incomplete type", type
);
10195 /* If we're instantiating a template, tell them which
10196 instantiation made the field's type be incomplete. */
10197 if (current_class_type
10198 && TYPE_NAME (current_class_type
)
10199 && IDENTIFIER_TEMPLATE (current_class_name
)
10201 && declspecs
->type
== type
)
10202 error (" in instantiation of template %qT",
10203 current_class_type
);
10205 return error_mark_node
;
10211 error ("%qE is neither function nor member function; "
10212 "cannot be declared friend", unqualified_id
);
10220 /* Friends are treated specially. */
10221 if (ctype
== current_class_type
)
10222 ; /* We already issued a permerror. */
10223 else if (decl
&& DECL_NAME (decl
))
10225 if (template_class_depth (current_class_type
) == 0)
10227 decl
= check_explicit_specialization
10228 (unqualified_id
, decl
, template_count
,
10229 2 * funcdef_flag
+ 4);
10230 if (decl
== error_mark_node
)
10231 return error_mark_node
;
10234 decl
= do_friend (ctype
, unqualified_id
, decl
,
10240 return error_mark_node
;
10243 /* Structure field. It may not be a function, except for C++. */
10245 if (decl
== NULL_TREE
)
10249 /* C++ allows static class members. All other work
10250 for this is done by grokfield. */
10251 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
10252 set_linkage_for_static_data_member (decl
);
10253 /* Even if there is an in-class initialization, DECL
10254 is considered undefined until an out-of-class
10255 definition is provided. */
10256 DECL_EXTERNAL (decl
) = 1;
10259 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10261 if (constexpr_p
&& !initialized
)
10263 error ("constexpr static data member %qD must have an "
10264 "initializer", decl
);
10265 constexpr_p
= false;
10272 error ("non-static data member %qE declared %<constexpr%>",
10274 constexpr_p
= false;
10276 decl
= build_decl (input_location
,
10277 FIELD_DECL
, unqualified_id
, type
);
10278 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10279 if (bitfield
&& !unqualified_id
)
10280 TREE_NO_WARNING (decl
) = 1;
10282 if (storage_class
== sc_mutable
)
10284 DECL_MUTABLE_P (decl
) = 1;
10285 storage_class
= sc_none
;
10290 /* An attempt is being made to initialize a non-static
10291 member. This is new in C++11. */
10292 maybe_warn_cpp0x (CPP0X_NSDMI
);
10294 /* If this has been parsed with static storage class, but
10295 errors forced staticp to be cleared, ensure NSDMI is
10297 if (declspecs
->storage_class
== sc_static
)
10298 DECL_INITIAL (decl
) = error_mark_node
;
10302 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10303 memfn_quals
!= TYPE_UNQUALIFIED
,
10304 inlinep
, friendp
, raises
!= NULL_TREE
);
10307 else if (TREE_CODE (type
) == FUNCTION_TYPE
10308 || TREE_CODE (type
) == METHOD_TYPE
)
10310 tree original_name
;
10313 if (!unqualified_id
)
10314 return error_mark_node
;
10316 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10317 original_name
= dname
;
10319 original_name
= unqualified_id
;
10321 if (storage_class
== sc_auto
)
10322 error ("storage class %<auto%> invalid for function %qs", name
);
10323 else if (storage_class
== sc_register
)
10324 error ("storage class %<register%> invalid for function %qs", name
);
10326 error ("storage class %<__thread%> invalid for function %qs", name
);
10328 if (virt_specifiers
)
10329 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10330 /* Function declaration not at top level.
10331 Storage classes other than `extern' are not allowed
10332 and `extern' makes no difference. */
10333 if (! toplevel_bindings_p ()
10334 && (storage_class
== sc_static
10335 || declspecs
->specs
[(int)ds_inline
])
10338 if (storage_class
== sc_static
)
10339 pedwarn (input_location
, OPT_pedantic
,
10340 "%<static%> specified invalid for function %qs "
10341 "declared out of global scope", name
);
10343 pedwarn (input_location
, OPT_pedantic
,
10344 "%<inline%> specifier invalid for function %qs "
10345 "declared out of global scope", name
);
10348 if (ctype
== NULL_TREE
)
10352 error ("virtual non-class function %qs", name
);
10355 else if (sfk
== sfk_constructor
10356 || sfk
== sfk_destructor
)
10358 error (funcdef_flag
10359 ? G_("%qs defined in a non-class scope")
10360 : G_("%qs declared in a non-class scope"), name
);
10365 /* Record presence of `static'. */
10366 publicp
= (ctype
!= NULL_TREE
10367 || storage_class
== sc_extern
10368 || storage_class
!= sc_static
);
10370 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10371 virtualp
, flags
, memfn_quals
, raises
,
10373 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10375 template_count
, in_namespace
, attrlist
,
10376 declarator
->id_loc
);
10377 if (decl
== NULL_TREE
)
10378 return error_mark_node
;
10382 int invalid_static
= 0;
10384 /* Don't allow a static member function in a class, and forbid
10385 declaring main to be static. */
10386 if (TREE_CODE (type
) == METHOD_TYPE
)
10388 permerror (input_location
, "cannot declare member function %qD to have "
10389 "static linkage", decl
);
10390 invalid_static
= 1;
10392 else if (current_function_decl
)
10394 /* FIXME need arm citation */
10395 error ("cannot declare static function inside another function");
10396 invalid_static
= 1;
10399 if (invalid_static
)
10402 storage_class
= sc_none
;
10408 /* It's a variable. */
10410 /* An uninitialized decl with `extern' is a reference. */
10411 decl
= grokvardecl (type
, unqualified_id
,
10414 (type_quals
& TYPE_QUAL_CONST
) != 0,
10415 ctype
? ctype
: in_namespace
);
10416 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10417 memfn_quals
!= TYPE_UNQUALIFIED
,
10418 inlinep
, friendp
, raises
!= NULL_TREE
);
10422 DECL_CONTEXT (decl
) = ctype
;
10425 permerror (input_location
, "%<static%> may not be used when defining "
10426 "(as opposed to declaring) a static data member");
10428 storage_class
= sc_none
;
10430 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10432 error ("static member %qD declared %<register%>", decl
);
10433 storage_class
= sc_none
;
10435 if (storage_class
== sc_extern
&& pedantic
)
10437 pedwarn (input_location
, OPT_pedantic
,
10438 "cannot explicitly declare member %q#D to have "
10439 "extern linkage", decl
);
10440 storage_class
= sc_none
;
10443 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10445 error ("declaration of constexpr variable %qD is not a definition",
10447 constexpr_p
= false;
10451 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10453 if (toplevel_bindings_p ())
10455 /* It's common practice (and completely valid) to have a const
10456 be initialized and declared extern. */
10457 if (!(type_quals
& TYPE_QUAL_CONST
))
10458 warning (0, "%qs initialized and declared %<extern%>", name
);
10462 error ("%qs has both %<extern%> and initializer", name
);
10463 return error_mark_node
;
10467 /* Record `register' declaration for warnings on &
10468 and in case doing stupid register allocation. */
10470 if (storage_class
== sc_register
)
10471 DECL_REGISTER (decl
) = 1;
10472 else if (storage_class
== sc_extern
)
10473 DECL_THIS_EXTERN (decl
) = 1;
10474 else if (storage_class
== sc_static
)
10475 DECL_THIS_STATIC (decl
) = 1;
10477 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10478 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10479 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10481 /* Record constancy and volatility on the DECL itself . There's
10482 no need to do this when processing a template; we'll do this
10483 for the instantiated declaration based on the type of DECL. */
10484 if (!processing_template_decl
)
10485 cp_apply_type_quals_to_decl (type_quals
, decl
);
10491 /* Subroutine of start_function. Ensure that each of the parameter
10492 types (as listed in PARMS) is complete, as is required for a
10493 function definition. */
10496 require_complete_types_for_parms (tree parms
)
10498 for (; parms
; parms
= DECL_CHAIN (parms
))
10500 if (dependent_type_p (TREE_TYPE (parms
)))
10502 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10503 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10505 relayout_decl (parms
);
10506 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10509 /* grokparms or complete_type_or_else will have already issued
10511 TREE_TYPE (parms
) = error_mark_node
;
10515 /* Returns nonzero if T is a local variable. */
10518 local_variable_p (const_tree t
)
10520 if ((TREE_CODE (t
) == VAR_DECL
10521 /* A VAR_DECL with a context that is a _TYPE is a static data
10523 && !TYPE_P (CP_DECL_CONTEXT (t
))
10524 /* Any other non-local variable must be at namespace scope. */
10525 && !DECL_NAMESPACE_SCOPE_P (t
))
10526 || (TREE_CODE (t
) == PARM_DECL
))
10532 /* Like local_variable_p, but suitable for use as a tree-walking
10536 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10537 void *data ATTRIBUTE_UNUSED
)
10539 /* Check DECL_NAME to avoid including temporaries. We don't check
10540 DECL_ARTIFICIAL because we do want to complain about 'this'. */
10541 if (local_variable_p (*tp
) && DECL_NAME (*tp
))
10543 else if (TYPE_P (*tp
))
10544 *walk_subtrees
= 0;
10549 /* Check that ARG, which is a default-argument expression for a
10550 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10551 something goes wrong. DECL may also be a _TYPE node, rather than a
10552 DECL, if there is no DECL available. */
10555 check_default_argument (tree decl
, tree arg
)
10560 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10561 /* We get a DEFAULT_ARG when looking at an in-class declaration
10562 with a default argument. Ignore the argument for now; we'll
10563 deal with it after the class is complete. */
10572 decl_type
= TREE_TYPE (decl
);
10574 if (arg
== error_mark_node
10575 || decl
== error_mark_node
10576 || TREE_TYPE (arg
) == error_mark_node
10577 || decl_type
== error_mark_node
)
10578 /* Something already went wrong. There's no need to check
10580 return error_mark_node
;
10582 /* [dcl.fct.default]
10584 A default argument expression is implicitly converted to the
10586 if (!TREE_TYPE (arg
)
10587 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
10590 error ("default argument for %q#D has type %qT",
10591 decl
, TREE_TYPE (arg
));
10593 error ("default argument for parameter of type %qT has type %qT",
10594 decl_type
, TREE_TYPE (arg
));
10596 return error_mark_node
;
10599 if (warn_zero_as_null_pointer_constant
10600 && c_inhibit_evaluation_warnings
== 0
10601 && (POINTER_TYPE_P (decl_type
) || TYPE_PTR_TO_MEMBER_P (decl_type
))
10602 && null_ptr_cst_p (arg
)
10603 && !NULLPTR_TYPE_P (TREE_TYPE (arg
)))
10605 warning (OPT_Wzero_as_null_pointer_constant
,
10606 "zero as null pointer constant");
10607 return nullptr_node
;
10610 /* [dcl.fct.default]
10612 Local variables shall not be used in default argument
10615 The keyword `this' shall not be used in a default argument of a
10616 member function. */
10617 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10620 if (DECL_NAME (var
) == this_identifier
)
10621 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10623 error ("default argument %qE uses local variable %qD", arg
, var
);
10624 return error_mark_node
;
10631 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10634 type_is_deprecated (tree type
)
10636 enum tree_code code
;
10637 if (TREE_DEPRECATED (type
))
10639 if (TYPE_NAME (type
)
10640 && TREE_DEPRECATED (TYPE_NAME (type
)))
10643 /* Do warn about using typedefs to a deprecated class. */
10644 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10645 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10647 code
= TREE_CODE (type
);
10649 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10650 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10651 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10652 return type_is_deprecated (TREE_TYPE (type
));
10654 if (TYPE_PTRMEMFUNC_P (type
))
10655 return type_is_deprecated
10656 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10661 /* Decode the list of parameter types for a function type.
10662 Given the list of things declared inside the parens,
10663 return a list of types.
10665 If this parameter does not end with an ellipsis, we append
10668 *PARMS is set to the chain of PARM_DECLs created. */
10671 grokparms (tree parmlist
, tree
*parms
)
10673 tree result
= NULL_TREE
;
10674 tree decls
= NULL_TREE
;
10678 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10680 tree type
= NULL_TREE
;
10681 tree init
= TREE_PURPOSE (parm
);
10682 tree decl
= TREE_VALUE (parm
);
10683 const char *errmsg
;
10685 if (parm
== void_list_node
)
10688 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10691 type
= TREE_TYPE (decl
);
10692 if (VOID_TYPE_P (type
))
10694 if (same_type_p (type
, void_type_node
)
10695 && DECL_SELF_REFERENCE_P (type
)
10696 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10697 /* this is a parmlist of `(void)', which is ok. */
10699 cxx_incomplete_type_error (decl
, type
);
10700 /* It's not a good idea to actually create parameters of
10701 type `void'; other parts of the compiler assume that a
10702 void type terminates the parameter list. */
10703 type
= error_mark_node
;
10704 TREE_TYPE (decl
) = error_mark_node
;
10707 if (type
!= error_mark_node
10708 && TYPE_FOR_JAVA (type
)
10709 && MAYBE_CLASS_TYPE_P (type
))
10711 error ("parameter %qD has Java class type", decl
);
10712 type
= error_mark_node
;
10713 TREE_TYPE (decl
) = error_mark_node
;
10717 if (type
!= error_mark_node
10718 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10721 type
= error_mark_node
;
10722 TREE_TYPE (decl
) = error_mark_node
;
10725 if (type
!= error_mark_node
)
10727 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10729 tree deptype
= type_is_deprecated (type
);
10731 warn_deprecated_use (deptype
, NULL_TREE
);
10734 /* Top-level qualifiers on the parameters are
10735 ignored for function types. */
10736 type
= cp_build_qualified_type (type
, 0);
10737 if (TREE_CODE (type
) == METHOD_TYPE
)
10739 error ("parameter %qD invalidly declared method type", decl
);
10740 type
= build_pointer_type (type
);
10741 TREE_TYPE (decl
) = type
;
10743 else if (abstract_virtuals_error (decl
, type
))
10744 any_error
= 1; /* Seems like a good idea. */
10745 else if (POINTER_TYPE_P (type
))
10747 /* [dcl.fct]/6, parameter types cannot contain pointers
10748 (references) to arrays of unknown bound. */
10749 tree t
= TREE_TYPE (type
);
10750 int ptr
= TYPE_PTR_P (type
);
10754 if (TYPE_PTR_P (t
))
10756 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10758 else if (!TYPE_DOMAIN (t
))
10762 if (TREE_CODE (t
) == ARRAY_TYPE
)
10764 ? G_("parameter %qD includes pointer to array of "
10765 "unknown bound %qT")
10766 : G_("parameter %qD includes reference to array of "
10767 "unknown bound %qT"),
10773 else if (init
&& !processing_template_decl
)
10774 init
= check_default_argument (decl
, init
);
10777 DECL_CHAIN (decl
) = decls
;
10779 result
= tree_cons (init
, type
, result
);
10781 decls
= nreverse (decls
);
10782 result
= nreverse (result
);
10784 result
= chainon (result
, void_list_node
);
10791 /* D is a constructor or overloaded `operator='.
10793 Let T be the class in which D is declared. Then, this function
10796 -1 if D's is an ill-formed constructor or copy assignment operator
10797 whose first parameter is of type `T'.
10798 0 if D is not a copy constructor or copy assignment
10800 1 if D is a copy constructor or copy assignment operator whose
10801 first parameter is a reference to non-const qualified T.
10802 2 if D is a copy constructor or copy assignment operator whose
10803 first parameter is a reference to const qualified T.
10805 This function can be used as a predicate. Positive values indicate
10806 a copy constructor and nonzero values indicate a copy assignment
10810 copy_fn_p (const_tree d
)
10816 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10818 if (TREE_CODE (d
) == TEMPLATE_DECL
10819 || (DECL_TEMPLATE_INFO (d
)
10820 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10821 /* Instantiations of template member functions are never copy
10822 functions. Note that member functions of templated classes are
10823 represented as template functions internally, and we must
10824 accept those as copy functions. */
10827 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10831 arg_type
= TREE_VALUE (args
);
10832 if (arg_type
== error_mark_node
)
10835 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10837 /* Pass by value copy assignment operator. */
10840 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10841 && !TYPE_REF_IS_RVALUE (arg_type
)
10842 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10844 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10850 args
= TREE_CHAIN (args
);
10852 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10853 /* There are more non-optional args. */
10859 /* D is a constructor or overloaded `operator='.
10861 Let T be the class in which D is declared. Then, this function
10862 returns true when D is a move constructor or move assignment
10863 operator, false otherwise. */
10866 move_fn_p (const_tree d
)
10870 bool result
= false;
10872 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10874 if (cxx_dialect
== cxx98
)
10875 /* There are no move constructors if we are in C++98 mode. */
10878 if (TREE_CODE (d
) == TEMPLATE_DECL
10879 || (DECL_TEMPLATE_INFO (d
)
10880 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10881 /* Instantiations of template member functions are never copy
10882 functions. Note that member functions of templated classes are
10883 represented as template functions internally, and we must
10884 accept those as copy functions. */
10887 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10891 arg_type
= TREE_VALUE (args
);
10892 if (arg_type
== error_mark_node
)
10895 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10896 && TYPE_REF_IS_RVALUE (arg_type
)
10897 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10901 args
= TREE_CHAIN (args
);
10903 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10904 /* There are more non-optional args. */
10910 /* Remember any special properties of member function DECL. */
10913 grok_special_member_properties (tree decl
)
10917 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10920 class_type
= DECL_CONTEXT (decl
);
10921 if (DECL_CONSTRUCTOR_P (decl
))
10923 int ctor
= copy_fn_p (decl
);
10925 if (!DECL_ARTIFICIAL (decl
))
10926 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10932 A non-template constructor for class X is a copy
10933 constructor if its first parameter is of type X&, const
10934 X&, volatile X& or const volatile X&, and either there
10935 are no other parameters or else all other parameters have
10936 default arguments. */
10937 TYPE_HAS_COPY_CTOR (class_type
) = 1;
10938 if (user_provided_p (decl
))
10939 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
10941 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
10943 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10945 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10946 if (user_provided_p (decl
))
10947 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10949 else if (move_fn_p (decl
) && user_provided_p (decl
))
10950 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
10951 else if (is_list_ctor (decl
))
10952 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10954 if (DECL_DECLARED_CONSTEXPR_P (decl
)
10955 && !copy_fn_p (decl
) && !move_fn_p (decl
))
10956 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
10958 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10962 A non-template assignment operator for class X is a copy
10963 assignment operator if its parameter is of type X, X&, const
10964 X&, volatile X& or const volatile X&. */
10966 int assop
= copy_fn_p (decl
);
10970 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
10971 if (user_provided_p (decl
))
10972 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
10974 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
10976 else if (move_fn_p (decl
) && user_provided_p (decl
))
10977 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
10979 /* Destructors are handled in check_methods. */
10982 /* Check a constructor DECL has the correct form. Complains
10983 if the class has a constructor of the form X(X). */
10986 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10988 int ctor_parm
= copy_fn_p (decl
);
10994 A declaration of a constructor for a class X is ill-formed if
10995 its first parameter is of type (optionally cv-qualified) X
10996 and either there are no other parameters or else all other
10997 parameters have default arguments.
10999 We *don't* complain about member template instantiations that
11000 have this form, though; they can occur as we try to decide
11001 what constructor to use during overload resolution. Since
11002 overload resolution will never prefer such a constructor to
11003 the non-template copy constructor (which is either explicitly
11004 or implicitly defined), there's no need to worry about their
11005 existence. Theoretically, they should never even be
11006 instantiated, but that's hard to forestall. */
11007 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11015 /* An operator with this code is unary, but can also be binary. */
11018 ambi_op_p (enum tree_code code
)
11020 return (code
== INDIRECT_REF
11021 || code
== ADDR_EXPR
11022 || code
== UNARY_PLUS_EXPR
11023 || code
== NEGATE_EXPR
11024 || code
== PREINCREMENT_EXPR
11025 || code
== PREDECREMENT_EXPR
);
11028 /* An operator with this name can only be unary. */
11031 unary_op_p (enum tree_code code
)
11033 return (code
== TRUTH_NOT_EXPR
11034 || code
== BIT_NOT_EXPR
11035 || code
== COMPONENT_REF
11036 || code
== TYPE_EXPR
);
11039 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11040 errors are issued for invalid declarations. */
11043 grok_op_properties (tree decl
, bool complain
)
11045 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11047 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11048 tree name
= DECL_NAME (decl
);
11049 enum tree_code operator_code
;
11054 /* Count the number of arguments and check for ellipsis. */
11055 for (argtype
= argtypes
, arity
= 0;
11056 argtype
&& argtype
!= void_list_node
;
11057 argtype
= TREE_CHAIN (argtype
))
11059 ellipsis_p
= !argtype
;
11061 class_type
= DECL_CONTEXT (decl
);
11062 if (class_type
&& !CLASS_TYPE_P (class_type
))
11063 class_type
= NULL_TREE
;
11065 if (DECL_CONV_FN_P (decl
))
11066 operator_code
= TYPE_EXPR
;
11070 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11071 if (ansi_opname (CODE) == name) \
11073 operator_code = (CODE); \
11076 else if (ansi_assopname (CODE) == name) \
11078 operator_code = (CODE); \
11079 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11083 #include "operators.def"
11084 #undef DEF_OPERATOR
11086 gcc_unreachable ();
11089 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11090 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11093 switch (operator_code
)
11096 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11100 TYPE_GETS_DELETE (class_type
) |= 1;
11104 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11107 case VEC_DELETE_EXPR
:
11108 TYPE_GETS_DELETE (class_type
) |= 2;
11115 /* [basic.std.dynamic.allocation]/1:
11117 A program is ill-formed if an allocation function is declared
11118 in a namespace scope other than global scope or declared static
11121 The same also holds true for deallocation functions. */
11122 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11123 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11125 if (DECL_NAMESPACE_SCOPE_P (decl
))
11127 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11129 error ("%qD may not be declared within a namespace", decl
);
11132 else if (!TREE_PUBLIC (decl
))
11134 error ("%qD may not be declared as static", decl
);
11140 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11142 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11143 DECL_IS_OPERATOR_NEW (decl
) = 1;
11145 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11146 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11149 /* An operator function must either be a non-static member function
11150 or have at least one parameter of a class, a reference to a class,
11151 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11152 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11154 if (operator_code
== TYPE_EXPR
11155 || operator_code
== CALL_EXPR
11156 || operator_code
== COMPONENT_REF
11157 || operator_code
== ARRAY_REF
11158 || operator_code
== NOP_EXPR
)
11160 error ("%qD must be a nonstatic member function", decl
);
11167 if (DECL_STATIC_FUNCTION_P (decl
))
11169 error ("%qD must be either a non-static member "
11170 "function or a non-member function", decl
);
11174 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11176 tree arg
= non_reference (TREE_VALUE (p
));
11177 if (arg
== error_mark_node
)
11180 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11181 because these checks are performed even on
11182 template functions. */
11183 if (MAYBE_CLASS_TYPE_P (arg
)
11184 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11188 if (!p
|| p
== void_list_node
)
11191 error ("%qD must have an argument of class or "
11192 "enumerated type", decl
);
11198 /* There are no restrictions on the arguments to an overloaded
11200 if (operator_code
== CALL_EXPR
)
11203 /* Warn about conversion operators that will never be used. */
11204 if (IDENTIFIER_TYPENAME_P (name
)
11205 && ! DECL_TEMPLATE_INFO (decl
)
11207 /* Warn only declaring the function; there is no need to
11208 warn again about out-of-class definitions. */
11209 && class_type
== current_class_type
)
11211 tree t
= TREE_TYPE (name
);
11212 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11215 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11217 if (TREE_CODE (t
) == VOID_TYPE
)
11218 warning (OPT_Wconversion
,
11220 ? G_("conversion to a reference to void "
11221 "will never use a type conversion operator")
11222 : G_("conversion to void "
11223 "will never use a type conversion operator"));
11224 else if (class_type
)
11226 if (t
== class_type
)
11227 warning (OPT_Wconversion
,
11229 ? G_("conversion to a reference to the same type "
11230 "will never use a type conversion operator")
11231 : G_("conversion to the same type "
11232 "will never use a type conversion operator"));
11233 /* Don't force t to be complete here. */
11234 else if (MAYBE_CLASS_TYPE_P (t
)
11235 && COMPLETE_TYPE_P (t
)
11236 && DERIVED_FROM_P (t
, class_type
))
11237 warning (OPT_Wconversion
,
11239 ? G_("conversion to a reference to a base class "
11240 "will never use a type conversion operator")
11241 : G_("conversion to a base class "
11242 "will never use a type conversion operator"));
11247 if (operator_code
== COND_EXPR
)
11250 error ("ISO C++ prohibits overloading operator ?:");
11253 else if (ellipsis_p
)
11255 error ("%qD must not have variable number of arguments", decl
);
11258 else if (ambi_op_p (operator_code
))
11261 /* We pick the one-argument operator codes by default, so
11262 we don't have to change anything. */
11264 else if (arity
== 2)
11266 /* If we thought this was a unary operator, we now know
11267 it to be a binary operator. */
11268 switch (operator_code
)
11271 operator_code
= MULT_EXPR
;
11275 operator_code
= BIT_AND_EXPR
;
11278 case UNARY_PLUS_EXPR
:
11279 operator_code
= PLUS_EXPR
;
11283 operator_code
= MINUS_EXPR
;
11286 case PREINCREMENT_EXPR
:
11287 operator_code
= POSTINCREMENT_EXPR
;
11290 case PREDECREMENT_EXPR
:
11291 operator_code
= POSTDECREMENT_EXPR
;
11295 gcc_unreachable ();
11298 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11300 if ((operator_code
== POSTINCREMENT_EXPR
11301 || operator_code
== POSTDECREMENT_EXPR
)
11302 && ! processing_template_decl
11303 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11306 error ("postfix %qD must take %<int%> as its argument",
11309 error ("postfix %qD must take %<int%> as its second "
11317 error ("%qD must take either zero or one argument", decl
);
11319 error ("%qD must take either one or two arguments", decl
);
11323 /* More Effective C++ rule 6. */
11325 && (operator_code
== POSTINCREMENT_EXPR
11326 || operator_code
== POSTDECREMENT_EXPR
11327 || operator_code
== PREINCREMENT_EXPR
11328 || operator_code
== PREDECREMENT_EXPR
))
11330 tree arg
= TREE_VALUE (argtypes
);
11331 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11332 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11333 arg
= TREE_TYPE (arg
);
11334 arg
= TYPE_MAIN_VARIANT (arg
);
11335 if (operator_code
== PREINCREMENT_EXPR
11336 || operator_code
== PREDECREMENT_EXPR
)
11338 if (TREE_CODE (ret
) != REFERENCE_TYPE
11339 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11341 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11342 build_reference_type (arg
));
11346 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11347 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11351 else if (unary_op_p (operator_code
))
11356 error ("%qD must take %<void%>", decl
);
11358 error ("%qD must take exactly one argument", decl
);
11362 else /* if (binary_op_p (operator_code)) */
11367 error ("%qD must take exactly one argument", decl
);
11369 error ("%qD must take exactly two arguments", decl
);
11373 /* More Effective C++ rule 7. */
11375 && (operator_code
== TRUTH_ANDIF_EXPR
11376 || operator_code
== TRUTH_ORIF_EXPR
11377 || operator_code
== COMPOUND_EXPR
))
11378 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11382 /* Effective C++ rule 23. */
11385 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11386 && (operator_code
== PLUS_EXPR
11387 || operator_code
== MINUS_EXPR
11388 || operator_code
== TRUNC_DIV_EXPR
11389 || operator_code
== MULT_EXPR
11390 || operator_code
== TRUNC_MOD_EXPR
)
11391 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11392 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11394 /* [over.oper]/8 */
11395 for (; argtypes
&& argtypes
!= void_list_node
;
11396 argtypes
= TREE_CHAIN (argtypes
))
11397 if (TREE_PURPOSE (argtypes
))
11399 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11400 if (operator_code
== POSTINCREMENT_EXPR
11401 || operator_code
== POSTDECREMENT_EXPR
)
11403 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
11408 error ("%qD cannot have default arguments", decl
);
11416 /* Return a string giving the keyword associate with CODE. */
11418 static const char *
11419 tag_name (enum tag_types code
)
11431 case typename_type
:
11434 gcc_unreachable ();
11438 /* Name lookup in an elaborated-type-specifier (after the keyword
11439 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11440 elaborated-type-specifier is invalid, issue a diagnostic and return
11441 error_mark_node; otherwise, return the *_TYPE to which it referred.
11442 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11445 check_elaborated_type_specifier (enum tag_types tag_code
,
11447 bool allow_template_p
)
11451 if (decl
== error_mark_node
)
11452 return error_mark_node
;
11456 struct S { struct S *p; };
11458 name lookup will find the TYPE_DECL for the implicit "S::S"
11459 typedef. Adjust for that here. */
11460 if (DECL_SELF_REFERENCE_P (decl
))
11461 decl
= TYPE_NAME (TREE_TYPE (decl
));
11463 type
= TREE_TYPE (decl
);
11465 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11466 is false for this case as well. */
11467 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11469 error ("using template type parameter %qT after %qs",
11470 type
, tag_name (tag_code
));
11471 return error_mark_node
;
11473 /* Accept bound template template parameters. */
11474 else if (allow_template_p
11475 && TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
)
11479 If the identifier resolves to a typedef-name or the
11480 simple-template-id resolves to an alias template
11481 specialization, the elaborated-type-specifier is ill-formed.
11483 In other words, the only legitimate declaration to use in the
11484 elaborated type specifier is the implicit typedef created when
11485 the type is declared. */
11486 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11487 && !DECL_SELF_REFERENCE_P (decl
)
11488 && tag_code
!= typename_type
)
11490 if (alias_template_specialization_p (type
))
11491 error ("using alias template specialization %qT after %qs",
11492 type
, tag_name (tag_code
));
11494 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11495 inform (DECL_SOURCE_LOCATION (decl
),
11496 "%qD has a previous declaration here", decl
);
11497 return error_mark_node
;
11499 else if (TREE_CODE (type
) != RECORD_TYPE
11500 && TREE_CODE (type
) != UNION_TYPE
11501 && tag_code
!= enum_type
11502 && tag_code
!= typename_type
)
11504 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11505 error ("%q+T has a previous declaration here", type
);
11506 return error_mark_node
;
11508 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11509 && tag_code
== enum_type
)
11511 error ("%qT referred to as enum", type
);
11512 error ("%q+T has a previous declaration here", type
);
11513 return error_mark_node
;
11515 else if (!allow_template_p
11516 && TREE_CODE (type
) == RECORD_TYPE
11517 && CLASSTYPE_IS_TEMPLATE (type
))
11519 /* If a class template appears as elaborated type specifier
11520 without a template header such as:
11522 template <class T> class C {};
11523 void f(class C); // No template header here
11525 then the required template argument is missing. */
11526 error ("template argument required for %<%s %T%>",
11527 tag_name (tag_code
),
11528 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11529 return error_mark_node
;
11535 /* Lookup NAME in elaborate type specifier in scope according to
11536 SCOPE and issue diagnostics if necessary.
11537 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11538 found, and ERROR_MARK_NODE for type error. */
11541 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11542 tag_scope scope
, bool template_header_p
)
11546 if (scope
== ts_global
)
11548 /* First try ordinary name lookup, ignoring hidden class name
11549 injected via friend declaration. */
11550 decl
= lookup_name_prefer_type (name
, 2);
11551 /* If that fails, the name will be placed in the smallest
11552 non-class, non-function-prototype scope according to 3.3.1/5.
11553 We may already have a hidden name declared as friend in this
11554 scope. So lookup again but not ignoring hidden names.
11555 If we find one, that name will be made visible rather than
11556 creating a new tag. */
11558 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11561 decl
= lookup_type_scope (name
, scope
);
11563 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
11564 decl
= DECL_TEMPLATE_RESULT (decl
);
11566 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11568 /* Look for invalid nested type:
11572 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11574 error ("%qD has the same name as the class in which it is "
11577 return error_mark_node
;
11580 /* Two cases we need to consider when deciding if a class
11581 template is allowed as an elaborated type specifier:
11582 1. It is a self reference to its own class.
11583 2. It comes with a template header.
11587 template <class T> class C {
11588 class C *c1; // DECL_SELF_REFERENCE_P is true
11591 template <class U> class C; // template_header_p is true
11592 template <class T> class C<T>::D {
11593 class C *c2; // DECL_SELF_REFERENCE_P is true
11596 t
= check_elaborated_type_specifier (tag_code
,
11599 | DECL_SELF_REFERENCE_P (decl
));
11602 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11604 error ("reference to %qD is ambiguous", name
);
11605 print_candidates (decl
);
11606 return error_mark_node
;
11612 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11613 Define the tag as a forward-reference if it is not defined.
11615 If a declaration is given, process it here, and report an error if
11616 multiple declarations are not identical.
11618 SCOPE is TS_CURRENT when this is also a definition. Only look in
11619 the current frame for the name (since C++ allows new names in any
11620 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11621 declaration. Only look beginning from the current scope outward up
11622 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11624 TEMPLATE_HEADER_P is true when this declaration is preceded by
11625 a set of template parameters. */
11628 xref_tag_1 (enum tag_types tag_code
, tree name
,
11629 tag_scope scope
, bool template_header_p
)
11631 enum tree_code code
;
11633 tree context
= NULL_TREE
;
11635 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11641 code
= RECORD_TYPE
;
11647 code
= ENUMERAL_TYPE
;
11650 gcc_unreachable ();
11653 /* In case of anonymous name, xref_tag is only called to
11654 make type node and push name. Name lookup is not required. */
11655 if (ANON_AGGRNAME_P (name
))
11658 t
= lookup_and_check_tag (tag_code
, name
,
11659 scope
, template_header_p
);
11661 if (t
== error_mark_node
)
11662 return error_mark_node
;
11664 if (scope
!= ts_current
&& t
&& current_class_type
11665 && template_class_depth (current_class_type
)
11666 && template_header_p
)
11668 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11669 definition of this tag. Since, in addition, we are currently
11670 processing a (member) template declaration of a template
11671 class, we must be very careful; consider:
11678 { template <class V>
11679 friend struct S1; };
11681 Here, the S2::S1 declaration should not be confused with the
11682 outer declaration. In particular, the inner version should
11683 have a template parameter of level 2, not level 1. This
11684 would be particularly important if the member declaration
11687 template <class V = U> friend struct S1;
11689 say, when we should tsubst into `U' when instantiating
11690 S2. On the other hand, when presented with:
11700 we must find the inner binding eventually. We
11701 accomplish this by making sure that the new type we
11702 create to represent this declaration has the right
11704 context
= TYPE_CONTEXT (t
);
11710 /* If no such tag is yet defined, create a forward-reference node
11711 and record it as the "definition".
11712 When a real declaration of this type is found,
11713 the forward-reference will be altered into a real type. */
11714 if (code
== ENUMERAL_TYPE
)
11716 error ("use of enum %q#D without previous declaration", name
);
11717 return error_mark_node
;
11721 t
= make_class_type (code
);
11722 TYPE_CONTEXT (t
) = context
;
11723 t
= pushtag (name
, t
, scope
);
11728 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11730 if (!redeclare_class_template (t
, current_template_parms
))
11731 return error_mark_node
;
11733 else if (!processing_template_decl
11734 && CLASS_TYPE_P (t
)
11735 && CLASSTYPE_IS_TEMPLATE (t
))
11737 error ("redeclaration of %qT as a non-template", t
);
11738 error ("previous declaration %q+D", t
);
11739 return error_mark_node
;
11742 /* Make injected friend class visible. */
11743 if (scope
!= ts_within_enclosing_non_class
11744 && hidden_name_p (TYPE_NAME (t
)))
11746 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11747 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11749 if (TYPE_TEMPLATE_INFO (t
))
11751 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11752 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11760 /* Wrapper for xref_tag_1. */
11763 xref_tag (enum tag_types tag_code
, tree name
,
11764 tag_scope scope
, bool template_header_p
)
11768 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
11769 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
11770 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
11776 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11778 enum tag_types tag_kind
;
11780 if (TREE_CODE (old
) == RECORD_TYPE
)
11781 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11783 tag_kind
= union_type
;
11785 if (id
== NULL_TREE
)
11786 id
= TYPE_IDENTIFIER (old
);
11788 return xref_tag (tag_kind
, id
, scope
, false);
11791 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11792 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11793 access_* node, and the TREE_VALUE is the type of the base-class.
11794 Non-NULL TREE_TYPE indicates virtual inheritance.
11796 Returns true if the binfo hierarchy was successfully created,
11797 false if an error was detected. */
11800 xref_basetypes (tree ref
, tree base_list
)
11803 tree binfo
, base_binfo
;
11804 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11805 unsigned max_bases
= 0; /* Maximum direct bases. */
11807 tree default_access
;
11808 tree igo_prev
; /* Track Inheritance Graph Order. */
11810 if (ref
== error_mark_node
)
11813 /* The base of a derived class is private by default, all others are
11815 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11816 && CLASSTYPE_DECLARED_CLASS (ref
)
11817 ? access_private_node
: access_public_node
);
11819 /* First, make sure that any templates in base-classes are
11820 instantiated. This ensures that if we call ourselves recursively
11821 we do not get confused about which classes are marked and which
11823 basep
= &base_list
;
11826 tree basetype
= TREE_VALUE (*basep
);
11828 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11829 && !complete_type_or_else (basetype
, NULL
))
11830 /* An incomplete type. Remove it from the list. */
11831 *basep
= TREE_CHAIN (*basep
);
11835 if (TREE_TYPE (*basep
))
11837 if (CLASS_TYPE_P (basetype
))
11838 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11839 basep
= &TREE_CHAIN (*basep
);
11843 TYPE_MARKED_P (ref
) = 1;
11845 /* The binfo slot should be empty, unless this is an (ill-formed)
11847 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11849 error ("redefinition of %q#T", ref
);
11853 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11855 binfo
= make_tree_binfo (max_bases
);
11857 TYPE_BINFO (ref
) = binfo
;
11858 BINFO_OFFSET (binfo
) = size_zero_node
;
11859 BINFO_TYPE (binfo
) = ref
;
11861 /* Apply base-class info set up to the variants of this type. */
11862 fixup_type_variants (ref
);
11866 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11867 /* An aggregate cannot have baseclasses. */
11868 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11870 if (TREE_CODE (ref
) == UNION_TYPE
)
11872 error ("derived union %qT invalid", ref
);
11879 if (TYPE_FOR_JAVA (ref
))
11881 error ("Java class %qT cannot have multiple bases", ref
);
11888 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11890 if (TYPE_FOR_JAVA (ref
))
11892 error ("Java class %qT cannot have virtual bases", ref
);
11897 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11899 tree access
= TREE_PURPOSE (base_list
);
11900 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11901 tree basetype
= TREE_VALUE (base_list
);
11903 if (access
== access_default_node
)
11904 access
= default_access
;
11906 if (PACK_EXPANSION_P (basetype
))
11907 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11908 if (TREE_CODE (basetype
) == TYPE_DECL
)
11909 basetype
= TREE_TYPE (basetype
);
11910 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11912 error ("base type %qT fails to be a struct or class type",
11917 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11918 TYPE_FOR_JAVA (ref
) = 1;
11920 base_binfo
= NULL_TREE
;
11921 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
11923 base_binfo
= TYPE_BINFO (basetype
);
11924 /* The original basetype could have been a typedef'd type. */
11925 basetype
= BINFO_TYPE (base_binfo
);
11927 /* Inherit flags from the base. */
11928 TYPE_HAS_NEW_OPERATOR (ref
)
11929 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11930 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11931 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11932 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11933 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11934 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11935 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11936 CLASSTYPE_REPEATED_BASE_P (ref
)
11937 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11940 /* We must do this test after we've seen through a typedef
11942 if (TYPE_MARKED_P (basetype
))
11944 if (basetype
== ref
)
11945 error ("recursive type %qT undefined", basetype
);
11947 error ("duplicate base type %qT invalid", basetype
);
11951 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11952 /* Regenerate the pack expansion for the bases. */
11953 basetype
= make_pack_expansion (basetype
);
11955 TYPE_MARKED_P (basetype
) = 1;
11957 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11958 &igo_prev
, via_virtual
);
11959 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11960 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11962 BINFO_BASE_APPEND (binfo
, base_binfo
);
11963 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11966 if (VEC_length (tree
, CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
11967 /* If we didn't get max_vbases vbases, we must have shared at
11968 least one of them, and are therefore diamond shaped. */
11969 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11971 /* Unmark all the types. */
11972 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11973 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11974 TYPE_MARKED_P (ref
) = 0;
11976 /* Now see if we have a repeated base type. */
11977 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11979 for (base_binfo
= binfo
; base_binfo
;
11980 base_binfo
= TREE_CHAIN (base_binfo
))
11982 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11984 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11987 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11989 for (base_binfo
= binfo
; base_binfo
;
11990 base_binfo
= TREE_CHAIN (base_binfo
))
11991 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11992 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12001 /* Copies the enum-related properties from type SRC to type DST.
12002 Used with the underlying type of an enum and the enum itself. */
12004 copy_type_enum (tree dst
, tree src
)
12007 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12009 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12010 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12011 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12012 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12013 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12014 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12015 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12016 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12017 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12021 /* Begin compiling the definition of an enumeration type.
12024 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12026 UNDERLYING_TYPE is the type that will be used as the storage for
12027 the enumeration type. This should be NULL_TREE if no storage type
12030 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12032 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12034 Returns the type object, as yet incomplete.
12035 Also records info about it so that build_enumerator
12036 may be used to declare the individual values as they are read. */
12039 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12040 bool scoped_enum_p
, bool *is_new
)
12042 tree prevtype
= NULL_TREE
;
12043 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
12047 /* [C++0x dcl.enum]p5:
12049 If not explicitly specified, the underlying type of a scoped
12050 enumeration type is int. */
12051 if (!underlying_type
&& scoped_enum_p
)
12052 underlying_type
= integer_type_node
;
12054 if (underlying_type
)
12055 underlying_type
= cv_unqualified (underlying_type
);
12057 /* If this is the real definition for a previous forward reference,
12058 fill in the contents in the same object that used to be the
12059 forward reference. */
12061 enumtype
= lookup_and_check_tag (enum_type
, name
,
12062 /*tag_scope=*/ts_current
,
12063 /*template_header_p=*/false);
12065 /* In case of a template_decl, the only check that should be deferred
12066 to instantiation time is the comparison of underlying types. */
12067 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12069 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12071 error_at (input_location
, "scoped/unscoped mismatch "
12072 "in enum %q#T", enumtype
);
12073 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12074 "previous definition here");
12075 enumtype
= error_mark_node
;
12077 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12079 error_at (input_location
, "underlying type mismatch "
12080 "in enum %q#T", enumtype
);
12081 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12082 "previous definition here");
12083 enumtype
= error_mark_node
;
12085 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12086 && !dependent_type_p (underlying_type
)
12087 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12088 && !same_type_p (underlying_type
,
12089 ENUM_UNDERLYING_TYPE (enumtype
)))
12091 error_at (input_location
, "different underlying type "
12092 "in enum %q#T", enumtype
);
12093 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12094 "previous definition here");
12095 underlying_type
= NULL_TREE
;
12099 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12100 || processing_template_decl
)
12102 /* In case of error, make a dummy enum to allow parsing to
12104 if (enumtype
== error_mark_node
)
12106 name
= make_anon_name ();
12107 enumtype
= NULL_TREE
;
12110 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12111 of an opaque enum, or an opaque enum of an already defined
12112 enumeration (C++0x only).
12113 In any other case, it'll be NULL_TREE. */
12119 prevtype
= enumtype
;
12121 /* Do not push the decl more than once, unless we need to
12122 compare underlying types at instantiation time */
12124 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12125 || (underlying_type
12126 && dependent_type_p (underlying_type
))
12127 || (ENUM_UNDERLYING_TYPE (enumtype
)
12128 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12130 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12131 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12134 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12137 if (enumtype
== error_mark_node
)
12138 return error_mark_node
;
12140 /* The enum is considered opaque until the opening '{' of the
12141 enumerator list. */
12142 SET_OPAQUE_ENUM_P (enumtype
, true);
12143 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12146 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12148 if (underlying_type
)
12150 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12152 copy_type_enum (enumtype
, underlying_type
);
12153 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12155 else if (dependent_type_p (underlying_type
))
12156 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12158 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12159 underlying_type
, enumtype
);
12162 /* If into a template class, the returned enum is always the first
12163 declaration (opaque or not) seen. This way all the references to
12164 this type will be to the same declaration. The following ones are used
12165 only to check for definition errors. */
12166 if (prevtype
&& processing_template_decl
)
12172 /* After processing and defining all the values of an enumeration type,
12173 install their decls in the enumeration type.
12174 ENUMTYPE is the type object. */
12177 finish_enum_value_list (tree enumtype
)
12180 tree underlying_type
;
12183 tree minnode
, maxnode
;
12186 bool fixed_underlying_type_p
12187 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12189 /* We built up the VALUES in reverse order. */
12190 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12192 /* For an enum defined in a template, just set the type of the values;
12193 all further processing is postponed until the template is
12194 instantiated. We need to set the type so that tsubst of a CONST_DECL
12196 if (processing_template_decl
)
12198 for (values
= TYPE_VALUES (enumtype
);
12200 values
= TREE_CHAIN (values
))
12201 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12205 /* Determine the minimum and maximum values of the enumerators. */
12206 if (TYPE_VALUES (enumtype
))
12208 minnode
= maxnode
= NULL_TREE
;
12210 for (values
= TYPE_VALUES (enumtype
);
12212 values
= TREE_CHAIN (values
))
12214 decl
= TREE_VALUE (values
);
12216 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12217 each enumerator has the type of its enumeration. Prior to the
12218 closing brace, the type of each enumerator is the type of its
12219 initializing value. */
12220 TREE_TYPE (decl
) = enumtype
;
12222 /* Update the minimum and maximum values, if appropriate. */
12223 value
= DECL_INITIAL (decl
);
12224 if (value
== error_mark_node
)
12225 value
= integer_zero_node
;
12226 /* Figure out what the minimum and maximum values of the
12227 enumerators are. */
12229 minnode
= maxnode
= value
;
12230 else if (tree_int_cst_lt (maxnode
, value
))
12232 else if (tree_int_cst_lt (value
, minnode
))
12239 If the enumerator-list is empty, the underlying type is as if
12240 the enumeration had a single enumerator with value 0. */
12241 minnode
= maxnode
= integer_zero_node
;
12243 if (!fixed_underlying_type_p
)
12245 /* Compute the number of bits require to represent all values of the
12246 enumeration. We must do this before the type of MINNODE and
12247 MAXNODE are transformed, since tree_int_cst_min_precision relies
12248 on the TREE_TYPE of the value it is passed. */
12249 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12250 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12251 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12252 int precision
= MAX (lowprec
, highprec
);
12254 bool use_short_enum
;
12256 /* Determine the underlying type of the enumeration.
12260 The underlying type of an enumeration is an integral type that
12261 can represent all the enumerator values defined in the
12262 enumeration. It is implementation-defined which integral type is
12263 used as the underlying type for an enumeration except that the
12264 underlying type shall not be larger than int unless the value of
12265 an enumerator cannot fit in an int or unsigned int.
12267 We use "int" or an "unsigned int" as the underlying type, even if
12268 a smaller integral type would work, unless the user has
12269 explicitly requested that we use the smallest possible type. The
12270 user can request that for all enumerations with a command line
12271 flag, or for just one enumeration with an attribute. */
12273 use_short_enum
= flag_short_enums
12274 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12276 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12280 underlying_type
= integer_types
[itk
];
12281 if (underlying_type
!= NULL_TREE
12282 && TYPE_PRECISION (underlying_type
) >= precision
12283 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12286 if (itk
== itk_none
)
12290 IF no integral type can represent all the enumerator values, the
12291 enumeration is ill-formed. */
12292 error ("no integral type can represent all of the enumerator values "
12293 "for %qT", enumtype
);
12294 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12295 underlying_type
= integer_types
[itk_unsigned_long_long
];
12300 The value of sizeof() applied to an enumeration type, an object
12301 of an enumeration type, or an enumerator, is the value of sizeof()
12302 applied to the underlying type. */
12303 copy_type_enum (enumtype
, underlying_type
);
12305 /* Compute the minimum and maximum values for the type.
12309 For an enumeration where emin is the smallest enumerator and emax
12310 is the largest, the values of the enumeration are the values of the
12311 underlying type in the range bmin to bmax, where bmin and bmax are,
12312 respectively, the smallest and largest values of the smallest bit-
12313 field that can store emin and emax. */
12315 /* The middle-end currently assumes that types with TYPE_PRECISION
12316 narrower than their underlying type are suitably zero or sign
12317 extended to fill their mode. Similarly, it assumes that the front
12318 end assures that a value of a particular type must be within
12319 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12321 We used to set these fields based on bmin and bmax, but that led
12322 to invalid assumptions like optimizing away bounds checking. So
12323 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12324 TYPE_MAX_VALUE to the values for the mode above and only restrict
12325 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12326 ENUM_UNDERLYING_TYPE (enumtype
)
12327 = build_distinct_type_copy (underlying_type
);
12328 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12329 set_min_and_max_values_for_integral_type
12330 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12332 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12333 if (flag_strict_enums
)
12334 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12338 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12340 /* Convert each of the enumerators to the type of the underlying
12341 type of the enumeration. */
12342 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12344 location_t saved_location
;
12346 decl
= TREE_VALUE (values
);
12347 saved_location
= input_location
;
12348 input_location
= DECL_SOURCE_LOCATION (decl
);
12349 if (fixed_underlying_type_p
)
12350 /* If the enumeration type has a fixed underlying type, we
12351 already checked all of the enumerator values. */
12352 value
= DECL_INITIAL (decl
);
12354 value
= perform_implicit_conversion (underlying_type
,
12355 DECL_INITIAL (decl
),
12356 tf_warning_or_error
);
12357 input_location
= saved_location
;
12359 /* Do not clobber shared ints. */
12360 value
= copy_node (value
);
12362 TREE_TYPE (value
) = enumtype
;
12363 DECL_INITIAL (decl
) = value
;
12366 /* Fix up all variant types of this enum type. */
12367 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12368 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12370 /* Finish debugging output for this type. */
12371 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12374 /* Finishes the enum type. This is called only the first time an
12375 enumeration is seen, be it opaque or odinary.
12376 ENUMTYPE is the type object. */
12379 finish_enum (tree enumtype
)
12381 if (processing_template_decl
)
12383 if (at_function_scope_p ())
12384 add_stmt (build_min (TAG_DEFN
, enumtype
));
12388 /* If this is a forward declaration, there should not be any variants,
12389 though we can get a variant in the middle of an enum-specifier with
12390 wacky code like 'enum E { e = sizeof(const E*) };' */
12391 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12392 && (TYPE_VALUES (enumtype
)
12393 || !TYPE_NEXT_VARIANT (enumtype
)));
12396 /* Build and install a CONST_DECL for an enumeration constant of the
12397 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12398 LOC is the location of NAME.
12399 Assignment of sequential values by default is handled here. */
12402 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12408 /* If the VALUE was erroneous, pretend it wasn't there; that will
12409 result in the enum being assigned the next value in sequence. */
12410 if (value
== error_mark_node
)
12413 /* Remove no-op casts from the value. */
12415 STRIP_TYPE_NOPS (value
);
12417 if (! processing_template_decl
)
12419 /* Validate and default VALUE. */
12420 if (value
!= NULL_TREE
)
12422 value
= cxx_constant_value (value
);
12424 if (TREE_CODE (value
) != INTEGER_CST
12425 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12427 error ("enumerator value for %qD is not an integer constant",
12433 /* Default based on previous value. */
12434 if (value
== NULL_TREE
)
12436 if (TYPE_VALUES (enumtype
))
12439 unsigned HOST_WIDE_INT lo
;
12443 /* C++03 7.2/4: If no initializer is specified for the first
12444 enumerator, the type is an unspecified integral
12445 type. Otherwise the type is the same as the type of the
12446 initializing value of the preceding enumerator unless the
12447 incremented value is not representable in that type, in
12448 which case the type is an unspecified integral type
12449 sufficient to contain the incremented value. */
12450 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12451 if (error_operand_p (prev_value
))
12452 value
= error_mark_node
;
12455 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
12456 TREE_INT_CST_HIGH (prev_value
),
12461 tree type
= TREE_TYPE (prev_value
);
12462 bool pos
= (TYPE_UNSIGNED (type
) || hi
>= 0);
12463 di
.low
= lo
; di
.high
= hi
;
12464 if (!double_int_fits_to_tree_p (type
, di
))
12467 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12469 type
= integer_types
[itk
];
12470 if (type
!= NULL_TREE
12471 && (pos
|| !TYPE_UNSIGNED (type
))
12472 && double_int_fits_to_tree_p (type
, di
))
12475 if (type
&& cxx_dialect
< cxx0x
12476 && itk
> itk_unsigned_long
)
12477 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12478 incremented enumerator value is too large for %<unsigned long%>" : "\
12479 incremented enumerator value is too large for %<long%>");
12481 if (type
== NULL_TREE
)
12484 value
= double_int_to_tree (type
, di
);
12489 error ("overflow in enumeration values at %qD", name
);
12490 value
= error_mark_node
;
12495 value
= integer_zero_node
;
12498 /* Remove no-op casts from the value. */
12499 STRIP_TYPE_NOPS (value
);
12501 /* If the underlying type of the enum is fixed, check whether
12502 the enumerator values fits in the underlying type. If it
12503 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12504 if (ENUM_UNDERLYING_TYPE (enumtype
)
12506 && TREE_CODE (value
) == INTEGER_CST
12507 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12509 error ("enumerator value %E is too large for underlying type %<%T%>",
12510 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12512 /* Silently convert the value so that we can continue. */
12513 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12518 /* C++ associates enums with global, function, or class declarations. */
12519 context
= current_scope ();
12521 /* Build the actual enumeration constant. Note that the enumeration
12522 constants have the underlying type of the enum (if it is fixed)
12523 or the type of their initializer (if the underlying type of the
12524 enum is not fixed):
12528 If the underlying type is fixed, the type of each enumerator
12529 prior to the closing brace is the underlying type; if the
12530 initializing value of an enumerator cannot be represented by
12531 the underlying type, the program is ill-formed. If the
12532 underlying type is not fixed, the type of each enumerator is
12533 the type of its initializing value.
12535 If the underlying type is not fixed, it will be computed by
12536 finish_enum and we will reset the type of this enumerator. Of
12537 course, if we're processing a template, there may be no value. */
12538 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12540 if (context
&& context
== current_class_type
)
12541 /* This enum declaration is local to the class. We need the full
12542 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12543 decl
= build_lang_decl_loc (loc
, CONST_DECL
, name
, type
);
12545 /* It's a global enum, or it's local to a function. (Note local to
12546 a function could mean local to a class method. */
12547 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12549 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12550 TREE_CONSTANT (decl
) = 1;
12551 TREE_READONLY (decl
) = 1;
12552 DECL_INITIAL (decl
) = value
;
12554 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12555 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12556 on the TYPE_FIELDS list for `S'. (That's so that you can say
12557 things like `S::i' later.) */
12558 finish_member_declaration (decl
);
12562 /* Add this enumeration constant to the list for this type. */
12563 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12566 /* Look for an enumerator with the given NAME within the enumeration
12567 type ENUMTYPE. This routine is used primarily for qualified name
12568 lookup into an enumerator in C++0x, e.g.,
12570 enum class Color { Red, Green, Blue };
12572 Color color = Color::Red;
12574 Returns the value corresponding to the enumerator, or
12575 NULL_TREE if no such enumerator was found. */
12577 lookup_enumerator (tree enumtype
, tree name
)
12580 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12582 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12583 return e
? TREE_VALUE (e
) : NULL_TREE
;
12587 /* We're defining DECL. Make sure that its type is OK. */
12590 check_function_type (tree decl
, tree current_function_parms
)
12592 tree fntype
= TREE_TYPE (decl
);
12593 tree return_type
= complete_type (TREE_TYPE (fntype
));
12595 /* In a function definition, arg types must be complete. */
12596 require_complete_types_for_parms (current_function_parms
);
12598 if (dependent_type_p (return_type
)
12599 || type_uses_auto (return_type
))
12601 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12602 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12604 tree args
= TYPE_ARG_TYPES (fntype
);
12606 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12607 error ("return type %q#T is incomplete", return_type
);
12609 error ("return type has Java class type %q#T", return_type
);
12611 /* Make it return void instead. */
12612 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12613 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12615 TREE_CHAIN (args
));
12617 fntype
= build_function_type (void_type_node
, args
);
12619 = build_exception_variant (fntype
,
12620 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12621 fntype
= (cp_build_type_attribute_variant
12622 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12623 TREE_TYPE (decl
) = fntype
;
12626 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12629 /* Create the FUNCTION_DECL for a function definition.
12630 DECLSPECS and DECLARATOR are the parts of the declaration;
12631 they describe the function's name and the type it returns,
12632 but twisted together in a fashion that parallels the syntax of C.
12634 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12635 DECLARATOR is really the DECL for the function we are about to
12636 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12637 indicating that the function is an inline defined in-class.
12639 This function creates a binding context for the function body
12640 as well as setting up the FUNCTION_DECL in current_function_decl.
12642 For C++, we must first check whether that datum makes any sense.
12643 For example, "class A local_a(1,2);" means that variable local_a
12644 is an aggregate of type A, which should have a constructor
12645 applied to it with the argument list [1, 2].
12647 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12648 or may be a BLOCK if the function has been defined previously
12649 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12650 error_mark_node if the function has never been defined, or
12651 a BLOCK if the function has been defined somewhere. */
12654 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12656 tree ctype
= NULL_TREE
;
12659 int doing_friend
= 0;
12660 cp_binding_level
*bl
;
12661 tree current_function_parms
;
12662 struct c_fileinfo
*finfo
12663 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12664 bool honor_interface
;
12666 /* Sanity check. */
12667 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12668 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12670 fntype
= TREE_TYPE (decl1
);
12671 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12672 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12674 /* ISO C++ 11.4/5. A friend function defined in a class is in
12675 the (lexical) scope of the class in which it is defined. */
12676 if (!ctype
&& DECL_FRIEND_P (decl1
))
12678 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12680 /* CTYPE could be null here if we're dealing with a template;
12681 for example, `inline friend float foo()' inside a template
12682 will have no CTYPE set. */
12683 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12689 if (DECL_DECLARED_INLINE_P (decl1
)
12690 && lookup_attribute ("noinline", attrs
))
12691 warning (0, "inline function %q+D given attribute noinline", decl1
);
12693 /* Handle gnu_inline attribute. */
12694 if (GNU_INLINE_P (decl1
))
12696 DECL_EXTERNAL (decl1
) = 1;
12697 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12698 DECL_INTERFACE_KNOWN (decl1
) = 1;
12699 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12702 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12703 /* This is a constructor, we must ensure that any default args
12704 introduced by this definition are propagated to the clones
12705 now. The clones are used directly in overload resolution. */
12706 adjust_clone_args (decl1
);
12708 /* Sometimes we don't notice that a function is a static member, and
12709 build a METHOD_TYPE for it. Fix that up now. */
12710 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12711 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12713 /* Set up current_class_type, and enter the scope of the class, if
12716 push_nested_class (ctype
);
12717 else if (DECL_STATIC_FUNCTION_P (decl1
))
12718 push_nested_class (DECL_CONTEXT (decl1
));
12720 /* Now that we have entered the scope of the class, we must restore
12721 the bindings for any template parameters surrounding DECL1, if it
12722 is an inline member template. (Order is important; consider the
12723 case where a template parameter has the same name as a field of
12724 the class.) It is not until after this point that
12725 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12726 if (flags
& SF_INCLASS_INLINE
)
12727 maybe_begin_member_template_processing (decl1
);
12729 /* Effective C++ rule 15. */
12731 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12732 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12733 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
12735 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12736 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12737 if (!DECL_INITIAL (decl1
))
12738 DECL_INITIAL (decl1
) = error_mark_node
;
12740 /* This function exists in static storage.
12741 (This does not mean `static' in the C sense!) */
12742 TREE_STATIC (decl1
) = 1;
12744 /* We must call push_template_decl after current_class_type is set
12745 up. (If we are processing inline definitions after exiting a
12746 class scope, current_class_type will be NULL_TREE until set above
12747 by push_nested_class.) */
12748 if (processing_template_decl
)
12750 /* FIXME: Handle error_mark_node more gracefully. */
12751 tree newdecl1
= push_template_decl (decl1
);
12752 if (newdecl1
!= error_mark_node
)
12756 /* We are now in the scope of the function being defined. */
12757 current_function_decl
= decl1
;
12759 /* Save the parm names or decls from this function's declarator
12760 where store_parm_decls will find them. */
12761 current_function_parms
= DECL_ARGUMENTS (decl1
);
12763 /* Make sure the parameter and return types are reasonable. When
12764 you declare a function, these types can be incomplete, but they
12765 must be complete when you define the function. */
12766 check_function_type (decl1
, current_function_parms
);
12768 /* Build the return declaration for the function. */
12769 restype
= TREE_TYPE (fntype
);
12771 if (DECL_RESULT (decl1
) == NULL_TREE
)
12775 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
12776 DECL_ARTIFICIAL (resdecl
) = 1;
12777 DECL_IGNORED_P (resdecl
) = 1;
12778 DECL_RESULT (decl1
) = resdecl
;
12780 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
12783 /* Let the user know we're compiling this function. */
12784 announce_function (decl1
);
12786 /* Record the decl so that the function name is defined.
12787 If we already have a decl for this name, and it is a FUNCTION_DECL,
12788 use the old decl. */
12789 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12791 /* A specialization is not used to guide overload resolution. */
12792 if (!DECL_FUNCTION_MEMBER_P (decl1
)
12793 && !(DECL_USE_TEMPLATE (decl1
) &&
12794 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
12796 tree olddecl
= pushdecl (decl1
);
12798 if (olddecl
== error_mark_node
)
12799 /* If something went wrong when registering the declaration,
12800 use DECL1; we have to have a FUNCTION_DECL to use when
12801 parsing the body of the function. */
12805 /* Otherwise, OLDDECL is either a previous declaration
12806 of the same function or DECL1 itself. */
12808 if (warn_missing_declarations
12809 && olddecl
== decl1
12810 && !DECL_MAIN_P (decl1
)
12811 && TREE_PUBLIC (decl1
)
12812 && !DECL_DECLARED_INLINE_P (decl1
))
12816 /* Check whether DECL1 is in an anonymous
12818 for (context
= DECL_CONTEXT (decl1
);
12820 context
= DECL_CONTEXT (context
))
12822 if (TREE_CODE (context
) == NAMESPACE_DECL
12823 && DECL_NAME (context
) == NULL_TREE
)
12827 if (context
== NULL
)
12828 warning (OPT_Wmissing_declarations
,
12829 "no previous declaration for %q+D", decl1
);
12837 /* We need to set the DECL_CONTEXT. */
12838 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12839 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12841 fntype
= TREE_TYPE (decl1
);
12843 /* If #pragma weak applies, mark the decl appropriately now.
12844 The pragma only applies to global functions. Because
12845 determining whether or not the #pragma applies involves
12846 computing the mangled name for the declaration, we cannot
12847 apply the pragma until after we have merged this declaration
12848 with any previous declarations; if the original declaration
12849 has a linkage specification, that specification applies to
12850 the definition as well, and may affect the mangled name. */
12851 if (DECL_FILE_SCOPE_P (decl1
))
12852 maybe_apply_pragma_weak (decl1
);
12855 /* Reset this in case the call to pushdecl changed it. */
12856 current_function_decl
= decl1
;
12858 gcc_assert (DECL_INITIAL (decl1
));
12860 /* This function may already have been parsed, in which case just
12861 return; our caller will skip over the body without parsing. */
12862 if (DECL_INITIAL (decl1
) != error_mark_node
)
12865 /* Initialize RTL machinery. We cannot do this until
12866 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12867 even when processing a template; this is how we get
12868 CFUN set up, and our per-function variables initialized.
12869 FIXME factor out the non-RTL stuff. */
12870 bl
= current_binding_level
;
12871 allocate_struct_function (decl1
, processing_template_decl
);
12873 /* Initialize the language data structures. Whenever we start
12874 a new function, we destroy temporaries in the usual way. */
12875 cfun
->language
= ggc_alloc_cleared_language_function ();
12876 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12877 current_binding_level
= bl
;
12879 if (!processing_template_decl
&& type_uses_auto (restype
))
12881 FNDECL_USED_AUTO (decl1
) = true;
12882 current_function_auto_return_pattern
= restype
;
12885 /* Start the statement-tree, start the tree now. */
12886 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12888 /* If we are (erroneously) defining a function that we have already
12889 defined before, wipe out what we knew before. */
12890 if (!DECL_PENDING_INLINE_P (decl1
))
12891 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12893 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12895 /* We know that this was set up by `grokclassfn'. We do not
12896 wait until `store_parm_decls', since evil parse errors may
12897 never get us to that point. Here we keep the consistency
12898 between `current_class_type' and `current_class_ptr'. */
12899 tree t
= DECL_ARGUMENTS (decl1
);
12901 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12902 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12904 cp_function_chain
->x_current_class_ref
12905 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12906 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12907 cp_function_chain
->x_current_class_ptr
= t
;
12909 /* Constructors and destructors need to know whether they're "in
12910 charge" of initializing virtual base classes. */
12911 t
= DECL_CHAIN (t
);
12912 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12914 current_in_charge_parm
= t
;
12915 t
= DECL_CHAIN (t
);
12917 if (DECL_HAS_VTT_PARM_P (decl1
))
12919 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12920 current_vtt_parm
= t
;
12924 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12925 /* Implicitly-defined methods (like the
12926 destructor for a class in which no destructor
12927 is explicitly declared) must not be defined
12928 until their definition is needed. So, we
12929 ignore interface specifications for
12930 compiler-generated functions. */
12931 && !DECL_ARTIFICIAL (decl1
));
12933 if (processing_template_decl
)
12934 /* Don't mess with interface flags. */;
12935 else if (DECL_INTERFACE_KNOWN (decl1
))
12937 tree ctx
= decl_function_context (decl1
);
12939 if (DECL_NOT_REALLY_EXTERN (decl1
))
12940 DECL_EXTERNAL (decl1
) = 0;
12942 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12943 && TREE_PUBLIC (ctx
))
12944 /* This is a function in a local class in an extern inline
12946 comdat_linkage (decl1
);
12948 /* If this function belongs to an interface, it is public.
12949 If it belongs to someone else's interface, it is also external.
12950 This only affects inlines and template instantiations. */
12951 else if (!finfo
->interface_unknown
&& honor_interface
)
12953 if (DECL_DECLARED_INLINE_P (decl1
)
12954 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12956 DECL_EXTERNAL (decl1
)
12957 = (finfo
->interface_only
12958 || (DECL_DECLARED_INLINE_P (decl1
)
12959 && ! flag_implement_inlines
12960 && !DECL_VINDEX (decl1
)));
12962 /* For WIN32 we also want to put these in linkonce sections. */
12963 maybe_make_one_only (decl1
);
12966 DECL_EXTERNAL (decl1
) = 0;
12967 DECL_INTERFACE_KNOWN (decl1
) = 1;
12968 /* If this function is in an interface implemented in this file,
12969 make sure that the back end knows to emit this function
12971 if (!DECL_EXTERNAL (decl1
))
12972 mark_needed (decl1
);
12974 else if (finfo
->interface_unknown
&& finfo
->interface_only
12975 && honor_interface
)
12977 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12978 interface, we will have both finfo->interface_unknown and
12979 finfo->interface_only set. In that case, we don't want to
12980 use the normal heuristics because someone will supply a
12981 #pragma implementation elsewhere, and deducing it here would
12982 produce a conflict. */
12983 comdat_linkage (decl1
);
12984 DECL_EXTERNAL (decl1
) = 0;
12985 DECL_INTERFACE_KNOWN (decl1
) = 1;
12986 DECL_DEFER_OUTPUT (decl1
) = 1;
12990 /* This is a definition, not a reference.
12991 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12992 if (!GNU_INLINE_P (decl1
))
12993 DECL_EXTERNAL (decl1
) = 0;
12995 if ((DECL_DECLARED_INLINE_P (decl1
)
12996 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12997 && ! DECL_INTERFACE_KNOWN (decl1
))
12998 DECL_DEFER_OUTPUT (decl1
) = 1;
13000 DECL_INTERFACE_KNOWN (decl1
) = 1;
13003 /* Determine the ELF visibility attribute for the function. We must not
13004 do this before calling "pushdecl", as we must allow "duplicate_decls"
13005 to merge any attributes appropriately. We also need to wait until
13007 if (!DECL_CLONED_FUNCTION_P (decl1
))
13008 determine_visibility (decl1
);
13010 begin_scope (sk_function_parms
, decl1
);
13014 if (DECL_DESTRUCTOR_P (decl1
)
13015 || (DECL_CONSTRUCTOR_P (decl1
)
13016 && targetm
.cxx
.cdtor_returns_this ()))
13018 cdtor_label
= build_decl (input_location
,
13019 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13020 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13023 start_fname_decls ();
13025 store_parm_decls (current_function_parms
);
13029 /* Like start_preparsed_function, except that instead of a
13030 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13032 Returns 1 on success. If the DECLARATOR is not suitable for a function
13033 (it defines a datum instead), we return 0, which tells
13034 yyparse to report a parse error. */
13037 start_function (cp_decl_specifier_seq
*declspecs
,
13038 const cp_declarator
*declarator
,
13043 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13044 if (decl1
== error_mark_node
)
13046 /* If the declarator is not suitable for a function definition,
13047 cause a syntax error. */
13048 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13050 error ("invalid function declaration");
13054 if (DECL_MAIN_P (decl1
))
13055 /* main must return int. grokfndecl should have corrected it
13056 (and issued a diagnostic) if the user got it wrong. */
13057 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13058 integer_type_node
));
13060 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13065 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13069 use_eh_spec_block (tree fn
)
13071 return (flag_exceptions
&& flag_enforce_eh_specs
13072 && !processing_template_decl
13073 && !type_throw_all_p (TREE_TYPE (fn
))
13074 /* We insert the EH_SPEC_BLOCK only in the original
13075 function; then, it is copied automatically to the
13077 && !DECL_CLONED_FUNCTION_P (fn
)
13078 /* Implicitly-generated constructors and destructors have
13079 exception specifications. However, those specifications
13080 are the union of the possible exceptions specified by the
13081 constructors/destructors for bases and members, so no
13082 unallowed exception will ever reach this function. By
13083 not creating the EH_SPEC_BLOCK we save a little memory,
13084 and we avoid spurious warnings about unreachable
13086 && !DECL_DEFAULTED_FN (fn
));
13089 /* Store the parameter declarations into the current function declaration.
13090 This is called after parsing the parameter declarations, before
13091 digesting the body of the function.
13093 Also install to binding contour return value identifier, if any. */
13096 store_parm_decls (tree current_function_parms
)
13098 tree fndecl
= current_function_decl
;
13101 /* This is a chain of any other decls that came in among the parm
13102 declarations. If a parm is declared with enum {foo, bar} x;
13103 then CONST_DECLs for foo and bar are put here. */
13104 tree nonparms
= NULL_TREE
;
13106 if (current_function_parms
)
13108 /* This case is when the function was defined with an ANSI prototype.
13109 The parms already have decls, so we need not do anything here
13110 except record them as in effect
13111 and complain if any redundant old-style parm decls were written. */
13113 tree specparms
= current_function_parms
;
13116 /* Must clear this because it might contain TYPE_DECLs declared
13118 current_binding_level
->names
= NULL
;
13120 /* If we're doing semantic analysis, then we'll call pushdecl
13121 for each of these. We must do them in reverse order so that
13122 they end in the correct forward order. */
13123 specparms
= nreverse (specparms
);
13125 for (parm
= specparms
; parm
; parm
= next
)
13127 next
= DECL_CHAIN (parm
);
13128 if (TREE_CODE (parm
) == PARM_DECL
)
13130 if (DECL_NAME (parm
) == NULL_TREE
13131 || TREE_CODE (parm
) != VOID_TYPE
)
13134 error ("parameter %qD declared void", parm
);
13138 /* If we find an enum constant or a type tag,
13139 put it aside for the moment. */
13140 TREE_CHAIN (parm
) = NULL_TREE
;
13141 nonparms
= chainon (nonparms
, parm
);
13145 /* Get the decls in their original chain order and record in the
13146 function. This is all and only the PARM_DECLs that were
13147 pushed into scope by the loop above. */
13148 DECL_ARGUMENTS (fndecl
) = getdecls ();
13151 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13153 /* Now store the final chain of decls for the arguments
13154 as the decl-chain of the current lexical scope.
13155 Put the enumerators in as well, at the front so that
13156 DECL_ARGUMENTS is not modified. */
13157 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13159 if (use_eh_spec_block (current_function_decl
))
13160 current_eh_spec_block
= begin_eh_spec_block ();
13164 /* We have finished doing semantic analysis on DECL, but have not yet
13165 generated RTL for its body. Save away our current state, so that
13166 when we want to generate RTL later we know what to do. */
13169 save_function_data (tree decl
)
13171 struct language_function
*f
;
13173 /* Save the language-specific per-function data so that we can
13174 get it back when we really expand this function. */
13175 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13178 f
= ggc_alloc_language_function ();
13179 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13180 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13182 /* Clear out the bits we don't need. */
13183 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13184 f
->bindings
= NULL
;
13185 f
->x_local_names
= NULL
;
13186 f
->base
.local_typedefs
= NULL
;
13190 /* Set the return value of the constructor (if present). */
13193 finish_constructor_body (void)
13198 if (targetm
.cxx
.cdtor_returns_this ()
13199 && (! TYPE_FOR_JAVA (current_class_type
)))
13201 /* Any return from a constructor will end up here. */
13202 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13204 val
= DECL_ARGUMENTS (current_function_decl
);
13205 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13206 DECL_RESULT (current_function_decl
), val
);
13207 /* Return the address of the object. */
13208 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13209 add_stmt (exprstmt
);
13213 /* Do all the processing for the beginning of a destructor; set up the
13214 vtable pointers and cleanups for bases and members. */
13217 begin_destructor_body (void)
13219 tree compound_stmt
;
13221 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13222 issued an error message. We still want to try to process the
13223 body of the function, but initialize_vtbl_ptrs will crash if
13224 TYPE_BINFO is NULL. */
13225 if (COMPLETE_TYPE_P (current_class_type
))
13227 compound_stmt
= begin_compound_stmt (0);
13228 /* Make all virtual function table pointers in non-virtual base
13229 classes point to CURRENT_CLASS_TYPE's virtual function
13231 initialize_vtbl_ptrs (current_class_ptr
);
13232 finish_compound_stmt (compound_stmt
);
13234 /* And insert cleanups for our bases and members so that they
13235 will be properly destroyed if we throw. */
13236 push_base_cleanups ();
13240 /* At the end of every destructor we generate code to delete the object if
13241 necessary. Do that now. */
13244 finish_destructor_body (void)
13248 /* Any return from a destructor will end up here; that way all base
13249 and member cleanups will be run when the function returns. */
13250 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13252 /* In a virtual destructor, we must call delete. */
13253 if (DECL_VIRTUAL_P (current_function_decl
))
13256 tree virtual_size
= cxx_sizeof (current_class_type
);
13260 At the point of definition of a virtual destructor (including
13261 an implicit definition), non-placement operator delete shall
13262 be looked up in the scope of the destructor's class and if
13263 found shall be accessible and unambiguous. */
13264 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
13266 /*global_p=*/false,
13267 /*placement=*/NULL_TREE
,
13268 /*alloc_fn=*/NULL_TREE
);
13270 if_stmt
= begin_if_stmt ();
13271 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13272 current_in_charge_parm
,
13275 finish_expr_stmt (exprstmt
);
13276 finish_then_clause (if_stmt
);
13277 finish_if_stmt (if_stmt
);
13280 if (targetm
.cxx
.cdtor_returns_this ())
13284 val
= DECL_ARGUMENTS (current_function_decl
);
13285 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13286 DECL_RESULT (current_function_decl
), val
);
13287 /* Return the address of the object. */
13288 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13289 add_stmt (exprstmt
);
13293 /* Do the necessary processing for the beginning of a function body, which
13294 in this case includes member-initializers, but not the catch clauses of
13295 a function-try-block. Currently, this means opening a binding level
13296 for the member-initializers (in a ctor), member cleanups (in a dtor),
13297 and capture proxies (in a lambda operator()). */
13300 begin_function_body (void)
13304 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13307 if (processing_template_decl
)
13308 /* Do nothing now. */;
13310 /* Always keep the BLOCK node associated with the outermost pair of
13311 curly braces of a function. These are needed for correct
13312 operation of dwarfout.c. */
13313 keep_next_level (true);
13315 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13317 if (processing_template_decl
)
13318 /* Do nothing now. */;
13319 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13320 begin_destructor_body ();
13325 /* Do the processing for the end of a function body. Currently, this means
13326 closing out the cleanups for fully-constructed bases and members, and in
13327 the case of the destructor, deleting the object if desired. Again, this
13328 is only meaningful for [cd]tors, since they are the only functions where
13329 there is a significant distinction between the main body and any
13330 function catch clauses. Handling, say, main() return semantics here
13331 would be wrong, as flowing off the end of a function catch clause for
13332 main() would also need to return 0. */
13335 finish_function_body (tree compstmt
)
13337 if (compstmt
== NULL_TREE
)
13340 /* Close the block. */
13341 finish_compound_stmt (compstmt
);
13343 if (processing_template_decl
)
13344 /* Do nothing now. */;
13345 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13346 finish_constructor_body ();
13347 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13348 finish_destructor_body ();
13351 /* Given a function, returns the BLOCK corresponding to the outermost level
13352 of curly braces, skipping the artificial block created for constructor
13356 outer_curly_brace_block (tree fndecl
)
13358 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13359 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13360 /* Skip the artificial function body block. */
13361 block
= BLOCK_SUBBLOCKS (block
);
13365 /* If FNDECL is a class's key method, add the class to the list of
13366 keyed classes that should be emitted. */
13369 record_key_method_defined (tree fndecl
)
13371 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13372 && DECL_VIRTUAL_P (fndecl
)
13373 && !processing_template_decl
)
13375 tree fnclass
= DECL_CONTEXT (fndecl
);
13376 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13377 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13381 /* Subroutine of finish_function.
13382 Save the body of constexpr functions for possible
13383 future compile time evaluation. */
13386 maybe_save_function_definition (tree fun
)
13388 if (!processing_template_decl
13389 && DECL_DECLARED_CONSTEXPR_P (fun
)
13390 && !DECL_CLONED_FUNCTION_P (fun
))
13391 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13394 /* Finish up a function declaration and compile that function
13395 all the way to assembler language output. The free the storage
13396 for the function definition.
13398 FLAGS is a bitwise or of the following values:
13400 We just finished processing the body of an in-class inline
13401 function definition. (This processing will have taken place
13402 after the class definition is complete.) */
13405 finish_function (int flags
)
13407 tree fndecl
= current_function_decl
;
13408 tree fntype
, ctype
= NULL_TREE
;
13409 int inclass_inline
= (flags
& 2) != 0;
13411 /* When we get some parse errors, we can end up without a
13412 current_function_decl, so cope. */
13413 if (fndecl
== NULL_TREE
)
13414 return error_mark_node
;
13416 if (c_dialect_objc ())
13417 objc_finish_function ();
13419 gcc_assert (!defer_mark_used_calls
);
13420 defer_mark_used_calls
= true;
13422 record_key_method_defined (fndecl
);
13424 fntype
= TREE_TYPE (fndecl
);
13426 /* TREE_READONLY (fndecl) = 1;
13427 This caused &foo to be of type ptr-to-const-function
13428 which then got a warning when stored in a ptr-to-function variable. */
13430 gcc_assert (building_stmt_list_p ());
13431 /* The current function is being defined, so its DECL_INITIAL should
13432 be set, and unless there's a multiple definition, it should be
13433 error_mark_node. */
13434 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13436 /* For a cloned function, we've already got all the code we need;
13437 there's no need to add any extra bits. */
13438 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13440 if (DECL_MAIN_P (current_function_decl
))
13442 /* Make it so that `main' always returns 0 by default (or
13445 finish_return_stmt (integer_one_node
);
13447 finish_return_stmt (integer_zero_node
);
13451 if (use_eh_spec_block (current_function_decl
))
13452 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13453 (TREE_TYPE (current_function_decl
)),
13454 current_eh_spec_block
);
13457 /* If we're saving up tree structure, tie off the function now. */
13458 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13460 finish_fname_decls ();
13462 /* If this function can't throw any exceptions, remember that. */
13463 if (!processing_template_decl
13464 && !cp_function_chain
->can_throw
13465 && !flag_non_call_exceptions
13466 && !decl_replaceable_p (fndecl
))
13467 TREE_NOTHROW (fndecl
) = 1;
13469 /* This must come after expand_function_end because cleanups might
13470 have declarations (from inline functions) that need to go into
13471 this function's blocks. */
13473 /* If the current binding level isn't the outermost binding level
13474 for this function, either there is a bug, or we have experienced
13475 syntax errors and the statement tree is malformed. */
13476 if (current_binding_level
->kind
!= sk_function_parms
)
13478 /* Make sure we have already experienced errors. */
13479 gcc_assert (errorcount
);
13481 /* Throw away the broken statement tree and extra binding
13483 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13485 while (current_binding_level
->kind
!= sk_function_parms
)
13487 if (current_binding_level
->kind
== sk_class
)
13488 pop_nested_class ();
13490 poplevel (0, 0, 0);
13493 poplevel (1, 0, 1);
13495 /* Statements should always be full-expressions at the outermost set
13496 of curly braces for a function. */
13497 gcc_assert (stmts_are_full_exprs_p ());
13499 /* If there are no return statements in a function with auto return type,
13500 the return type is void. But if the declared type is something like
13501 auto*, this is an error. */
13502 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13503 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13505 if (!is_auto (current_function_auto_return_pattern
)
13506 && !current_function_returns_value
&& !current_function_returns_null
)
13508 error ("no return statements in function returning %qT",
13509 current_function_auto_return_pattern
);
13510 inform (input_location
, "only plain %<auto%> return type can be "
13511 "deduced to %<void%>");
13513 apply_deduced_return_type (fndecl
, void_type_node
);
13516 /* Save constexpr function body before it gets munged by
13517 the NRV transformation. */
13518 maybe_save_function_definition (fndecl
);
13520 /* Set up the named return value optimization, if we can. Candidate
13521 variables are selected in check_return_expr. */
13522 if (current_function_return_value
)
13524 tree r
= current_function_return_value
;
13527 if (r
!= error_mark_node
13528 /* This is only worth doing for fns that return in memory--and
13529 simpler, since we don't have to worry about promoted modes. */
13530 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13531 /* Only allow this for variables declared in the outer scope of
13532 the function so we know that their lifetime always ends with a
13533 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13534 we were to do this optimization in tree-ssa. */
13535 && (outer
= outer_curly_brace_block (fndecl
))
13536 && chain_member (r
, BLOCK_VARS (outer
)))
13537 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13539 current_function_return_value
= NULL_TREE
;
13542 /* Remember that we were in class scope. */
13543 if (current_class_name
)
13544 ctype
= current_class_type
;
13546 /* Must mark the RESULT_DECL as being in this function. */
13547 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13549 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13550 to the FUNCTION_DECL node itself. */
13551 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13553 /* Save away current state, if appropriate. */
13554 if (!processing_template_decl
)
13555 save_function_data (fndecl
);
13557 /* Complain if there's just no return statement. */
13558 if (warn_return_type
13559 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13560 && !dependent_type_p (TREE_TYPE (fntype
))
13561 && !current_function_returns_value
&& !current_function_returns_null
13562 /* Don't complain if we abort or throw. */
13563 && !current_function_returns_abnormally
13564 /* Don't complain if we are declared noreturn. */
13565 && !TREE_THIS_VOLATILE (fndecl
)
13566 && !DECL_NAME (DECL_RESULT (fndecl
))
13567 && !TREE_NO_WARNING (fndecl
)
13568 /* Structor return values (if any) are set by the compiler. */
13569 && !DECL_CONSTRUCTOR_P (fndecl
)
13570 && !DECL_DESTRUCTOR_P (fndecl
))
13572 warning (OPT_Wreturn_type
,
13573 "no return statement in function returning non-void");
13574 TREE_NO_WARNING (fndecl
) = 1;
13577 /* Store the end of the function, so that we get good line number
13578 info for the epilogue. */
13579 cfun
->function_end_locus
= input_location
;
13581 /* Complain about parameters that are only set, but never otherwise used. */
13582 if (warn_unused_but_set_parameter
13583 && !processing_template_decl
13584 && errorcount
== unused_but_set_errorcount
13585 && !DECL_CLONED_FUNCTION_P (fndecl
))
13589 for (decl
= DECL_ARGUMENTS (fndecl
);
13591 decl
= DECL_CHAIN (decl
))
13592 if (TREE_USED (decl
)
13593 && TREE_CODE (decl
) == PARM_DECL
13594 && !DECL_READ_P (decl
)
13595 && DECL_NAME (decl
)
13596 && !DECL_ARTIFICIAL (decl
)
13597 && !TREE_NO_WARNING (decl
)
13598 && !DECL_IN_SYSTEM_HEADER (decl
)
13599 && TREE_TYPE (decl
) != error_mark_node
13600 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13601 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13602 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13603 warning (OPT_Wunused_but_set_parameter
,
13604 "parameter %q+D set but not used", decl
);
13605 unused_but_set_errorcount
= errorcount
;
13608 /* Complain about locally defined typedefs that are not used in this
13610 maybe_warn_unused_local_typedefs ();
13612 /* Genericize before inlining. */
13613 if (!processing_template_decl
)
13615 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13616 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13617 cp_genericize (fndecl
);
13618 /* Clear out the bits we don't need. */
13619 f
->x_current_class_ptr
= NULL
;
13620 f
->x_current_class_ref
= NULL
;
13621 f
->x_eh_spec_block
= NULL
;
13622 f
->x_in_charge_parm
= NULL
;
13623 f
->x_vtt_parm
= NULL
;
13624 f
->x_return_value
= NULL
;
13625 f
->bindings
= NULL
;
13626 f
->extern_decl_map
= NULL
;
13628 /* Clear out the bits we don't need. */
13629 local_names
= NULL
;
13631 /* We're leaving the context of this function, so zap cfun. It's still in
13632 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13634 current_function_decl
= NULL
;
13636 /* If this is an in-class inline definition, we may have to pop the
13637 bindings for the template parameters that we added in
13638 maybe_begin_member_template_processing when start_function was
13640 if (inclass_inline
)
13641 maybe_end_member_template_processing ();
13643 /* Leave the scope of the class. */
13645 pop_nested_class ();
13650 current_function_decl
= NULL_TREE
;
13652 defer_mark_used_calls
= false;
13653 if (deferred_mark_used_calls
)
13658 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13660 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13666 /* Create the FUNCTION_DECL for a function definition.
13667 DECLSPECS and DECLARATOR are the parts of the declaration;
13668 they describe the return type and the name of the function,
13669 but twisted together in a fashion that parallels the syntax of C.
13671 This function creates a binding context for the function body
13672 as well as setting up the FUNCTION_DECL in current_function_decl.
13674 Returns a FUNCTION_DECL on success.
13676 If the DECLARATOR is not suitable for a function (it defines a datum
13677 instead), we return 0, which tells yyparse to report a parse error.
13679 May return void_type_node indicating that this method is actually
13680 a friend. See grokfield for more details.
13682 Came here with a `.pushlevel' .
13684 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13685 CHANGES TO CODE IN `grokfield'. */
13688 grokmethod (cp_decl_specifier_seq
*declspecs
,
13689 const cp_declarator
*declarator
, tree attrlist
)
13691 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13694 if (fndecl
== error_mark_node
)
13695 return error_mark_node
;
13697 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13699 error ("invalid member function declaration");
13700 return error_mark_node
;
13704 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13706 /* Pass friends other than inline friend functions back. */
13707 if (fndecl
== void_type_node
)
13710 if (DECL_IN_AGGR_P (fndecl
))
13712 if (DECL_CLASS_SCOPE_P (fndecl
))
13713 error ("%qD is already defined in class %qT", fndecl
,
13714 DECL_CONTEXT (fndecl
));
13715 return error_mark_node
;
13718 check_template_shadow (fndecl
);
13720 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13721 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13723 /* We process method specializations in finish_struct_1. */
13724 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13726 fndecl
= push_template_decl (fndecl
);
13727 if (fndecl
== error_mark_node
)
13731 if (! DECL_FRIEND_P (fndecl
))
13733 if (DECL_CHAIN (fndecl
))
13735 fndecl
= copy_node (fndecl
);
13736 TREE_CHAIN (fndecl
) = NULL_TREE
;
13740 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
13742 DECL_IN_AGGR_P (fndecl
) = 1;
13747 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13748 we can lay it out later, when and if its type becomes complete. */
13751 maybe_register_incomplete_var (tree var
)
13753 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
13755 /* Keep track of variables with incomplete types. */
13756 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
13757 && DECL_EXTERNAL (var
))
13759 tree inner_type
= TREE_TYPE (var
);
13761 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
13762 inner_type
= TREE_TYPE (inner_type
);
13763 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
13765 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
13766 /* RTTI TD entries are created while defining the type_info. */
13767 || (TYPE_LANG_SPECIFIC (inner_type
)
13768 && TYPE_BEING_DEFINED (inner_type
)))
13771 = VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, NULL
);
13773 iv
->incomplete_type
= inner_type
;
13778 /* Called when a class type (given by TYPE) is defined. If there are
13779 any existing VAR_DECLs whose type has been completed by this
13780 declaration, update them now. */
13783 complete_vars (tree type
)
13786 incomplete_var
*iv
;
13788 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
13790 if (same_type_p (type
, iv
->incomplete_type
))
13792 tree var
= iv
->decl
;
13793 tree type
= TREE_TYPE (var
);
13794 /* Complete the type of the variable. The VAR_DECL itself
13795 will be laid out in expand_expr. */
13796 complete_type (type
);
13797 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
13798 /* Remove this entry from the list. */
13799 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
13805 /* Check for pending declarations which may have abstract type. */
13806 complete_type_check_abstract (type
);
13809 /* If DECL is of a type which needs a cleanup, build and return an
13810 expression to perform that cleanup here. Return NULL_TREE if no
13811 cleanup need be done. */
13814 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
13820 /* Assume no cleanup is required. */
13821 cleanup
= NULL_TREE
;
13823 if (error_operand_p (decl
))
13826 /* Handle "__attribute__((cleanup))". We run the cleanup function
13827 before the destructor since the destructor is what actually
13828 terminates the lifetime of the object. */
13829 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
13836 /* Get the name specified by the user for the cleanup function. */
13837 id
= TREE_VALUE (TREE_VALUE (attr
));
13838 /* Look up the name to find the cleanup function to call. It is
13839 important to use lookup_name here because that is what is
13840 used in c-common.c:handle_cleanup_attribute when performing
13841 initial checks on the attribute. Note that those checks
13842 include ensuring that the function found is not an overloaded
13843 function, or an object with an overloaded call operator,
13844 etc.; we can rely on the fact that the function found is an
13845 ordinary FUNCTION_DECL. */
13846 fn
= lookup_name (id
);
13847 arg
= build_address (decl
);
13849 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
13850 if (cleanup
== error_mark_node
)
13851 return error_mark_node
;
13853 /* Handle ordinary C++ destructors. */
13854 type
= TREE_TYPE (decl
);
13855 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
13857 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
13858 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
13859 && CLASSTYPE_VBASECLASSES (type
));
13863 if (TREE_CODE (type
) == ARRAY_TYPE
)
13866 addr
= build_address (decl
);
13868 /* Optimize for space over speed here. */
13869 if (!has_vbases
|| flag_expensive_optimizations
)
13870 flags
|= LOOKUP_NONVIRTUAL
;
13872 call
= build_delete (TREE_TYPE (addr
), addr
,
13873 sfk_complete_destructor
, flags
, 0, complain
);
13874 if (call
== error_mark_node
)
13875 cleanup
= error_mark_node
;
13877 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
13882 /* build_delete sets the location of the destructor call to the
13883 current location, even though the destructor is going to be
13884 called later, at the end of the current scope. This can lead to
13885 a "jumpy" behaviour for users of debuggers when they step around
13886 the end of the block. So let's unset the location of the
13887 destructor call instead. */
13888 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
13889 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
13894 /* When a stmt has been parsed, this function is called. */
13901 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13902 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13903 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13906 static_fn_type (tree memfntype
)
13911 if (TYPE_PTRMEMFUNC_P (memfntype
))
13912 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13913 if (POINTER_TYPE_P (memfntype
)
13914 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13915 memfntype
= TREE_TYPE (memfntype
);
13916 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13918 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13919 args
= TYPE_ARG_TYPES (memfntype
);
13920 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13921 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13922 fntype
= (cp_build_type_attribute_variant
13923 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13924 fntype
= (build_exception_variant
13925 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13929 /* DECL was originally constructed as a non-static member function,
13930 but turned out to be static. Update it accordingly. */
13933 revert_static_member_fn (tree decl
)
13935 tree stype
= static_fn_type (decl
);
13936 cp_cv_quals quals
= type_memfn_quals (stype
);
13938 if (quals
!= TYPE_UNQUALIFIED
)
13939 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
13941 TREE_TYPE (decl
) = stype
;
13943 if (DECL_ARGUMENTS (decl
))
13944 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
13945 DECL_STATIC_FUNCTION_P (decl
) = 1;
13948 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13949 one of the language-independent trees. */
13951 enum cp_tree_node_structure_enum
13952 cp_tree_node_structure (union lang_tree_node
* t
)
13954 switch (TREE_CODE (&t
->generic
))
13956 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13957 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
13958 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13959 case OVERLOAD
: return TS_CP_OVERLOAD
;
13960 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13961 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13962 case BASELINK
: return TS_CP_BASELINK
;
13963 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13964 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13965 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13966 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13967 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13968 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
13969 default: return TS_CP_GENERIC
;
13973 /* Build the void_list_node (void_type_node having been created). */
13975 build_void_list_node (void)
13977 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13982 cp_missing_noreturn_ok_p (tree decl
)
13984 /* A missing noreturn is ok for the `main' function. */
13985 return DECL_MAIN_P (decl
);
13988 /* Return the COMDAT group into which DECL should be placed. */
13991 cxx_comdat_group (tree decl
)
13995 /* Virtual tables, construction virtual tables, and virtual table
13996 tables all go in a single COMDAT group, named after the primary
13998 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13999 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14000 /* For all other DECLs, the COMDAT group is the mangled name of the
14001 declaration itself. */
14004 while (DECL_THUNK_P (decl
))
14006 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14007 into the same section as the target function. In that case
14008 we must return target's name. */
14009 tree target
= THUNK_TARGET (decl
);
14010 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14011 && DECL_SECTION_NAME (target
) != NULL
14012 && DECL_ONE_ONLY (target
))
14017 name
= DECL_ASSEMBLER_NAME (decl
);
14023 #include "gt-cp-decl.h"