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
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 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
957 tree f1
= TREE_TYPE (newdecl
);
958 tree f2
= TREE_TYPE (olddecl
);
959 tree p1
= TYPE_ARG_TYPES (f1
);
960 tree p2
= TYPE_ARG_TYPES (f2
);
962 /* Specializations of different templates are different functions
963 even if they have the same type. */
964 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
965 ? DECL_TI_TEMPLATE (newdecl
)
967 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
968 ? DECL_TI_TEMPLATE (olddecl
)
973 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
974 && ! (DECL_EXTERN_C_P (newdecl
)
975 && DECL_EXTERN_C_P (olddecl
)))
978 #ifdef NO_IMPLICIT_EXTERN_C
979 /* A new declaration doesn't match a built-in one unless it
980 is also extern "C". */
981 if (DECL_IS_BUILTIN (olddecl
)
982 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
986 if (TREE_CODE (f1
) != TREE_CODE (f2
))
989 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
991 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
992 && (DECL_BUILT_IN (olddecl
)
993 #ifndef NO_IMPLICIT_EXTERN_C
994 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
995 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
999 types_match
= self_promoting_args_p (p1
);
1000 if (p1
== void_list_node
)
1001 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1003 #ifndef NO_IMPLICIT_EXTERN_C
1004 else if (!prototype_p (f1
)
1005 && (DECL_EXTERN_C_P (olddecl
)
1006 && DECL_IN_SYSTEM_HEADER (olddecl
)
1007 && !DECL_CLASS_SCOPE_P (olddecl
))
1008 && (DECL_EXTERN_C_P (newdecl
)
1009 && DECL_IN_SYSTEM_HEADER (newdecl
)
1010 && !DECL_CLASS_SCOPE_P (newdecl
)))
1012 types_match
= self_promoting_args_p (p2
);
1013 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1019 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1020 || comp_type_attributes (TREE_TYPE (newdecl
),
1021 TREE_TYPE (olddecl
)) != 0);
1026 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1028 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1029 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1032 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1033 DECL_TEMPLATE_PARMS (olddecl
)))
1036 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1037 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1038 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1040 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1041 DECL_TEMPLATE_RESULT (newdecl
));
1045 /* Need to check scope for variable declaration (VAR_DECL).
1046 For typedef (TYPE_DECL), scope is ignored. */
1047 if (TREE_CODE (newdecl
) == VAR_DECL
1048 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1050 Two declarations for an object with C language linkage
1051 with the same name (ignoring the namespace that qualify
1052 it) that appear in different namespace scopes refer to
1054 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1057 if (TREE_TYPE (newdecl
) == error_mark_node
)
1058 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1059 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1060 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1061 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1064 types_match
= comptypes (TREE_TYPE (newdecl
),
1065 TREE_TYPE (olddecl
),
1066 COMPARE_REDECLARATION
);
1072 /* If NEWDECL is `static' and an `extern' was seen previously,
1073 warn about it. OLDDECL is the previous declaration.
1075 Note that this does not apply to the C++ case of declaring
1076 a variable `extern const' and then later `const'.
1078 Don't complain about built-in functions, since they are beyond
1079 the user's control. */
1082 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1084 if (TREE_CODE (newdecl
) == TYPE_DECL
1085 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1086 || TREE_CODE (newdecl
) == CONST_DECL
1087 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1090 /* Don't get confused by static member functions; that's a different
1092 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1093 && DECL_STATIC_FUNCTION_P (newdecl
))
1096 /* If the old declaration was `static', or the new one isn't, then
1097 everything is OK. */
1098 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1101 /* It's OK to declare a builtin function as `static'. */
1102 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1103 && DECL_ARTIFICIAL (olddecl
))
1106 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1107 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1110 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1111 function templates. If their exception specifications do not
1112 match, issue a diagnostic. */
1115 check_redeclaration_exception_specification (tree new_decl
,
1120 tree new_exceptions
;
1121 tree old_exceptions
;
1123 new_type
= TREE_TYPE (new_decl
);
1124 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1125 old_type
= TREE_TYPE (old_decl
);
1126 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1130 If any declaration of a function has an exception-specification,
1131 all declarations, including the definition and an explicit
1132 specialization, of that function shall have an
1133 exception-specification with the same set of type-ids. */
1134 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1135 && ! DECL_IS_BUILTIN (old_decl
)
1137 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1139 error ("declaration of %qF has a different exception specifier",
1141 error ("from previous declaration %q+F", old_decl
);
1145 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1146 Otherwise issue diagnostics. */
1149 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1151 old_decl
= STRIP_TEMPLATE (old_decl
);
1152 new_decl
= STRIP_TEMPLATE (new_decl
);
1153 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1154 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1156 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1157 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1159 if (TREE_CODE (old_decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (old_decl
))
1161 /* Hide a built-in declaration. */
1162 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1163 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1166 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1167 error ("from previous declaration %q+D", old_decl
);
1171 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1172 && lookup_attribute ("gnu_inline", \
1173 DECL_ATTRIBUTES (fn)))
1175 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1176 If the redeclaration is invalid, a diagnostic is issued, and the
1177 error_mark_node is returned. Otherwise, OLDDECL is returned.
1179 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1182 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1185 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1187 unsigned olddecl_uid
= DECL_UID (olddecl
);
1188 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1189 int new_defines_function
= 0;
1190 tree new_template_info
;
1192 if (newdecl
== olddecl
)
1195 types_match
= decls_match (newdecl
, olddecl
);
1197 /* If either the type of the new decl or the type of the old decl is an
1198 error_mark_node, then that implies that we have already issued an
1199 error (earlier) for some bogus type specification, and in that case,
1200 it is rather pointless to harass the user with yet more error message
1201 about the same declaration, so just pretend the types match here. */
1202 if (TREE_TYPE (newdecl
) == error_mark_node
1203 || TREE_TYPE (olddecl
) == error_mark_node
)
1204 return error_mark_node
;
1206 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1207 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1209 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1210 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1211 && check_raw_literal_operator (olddecl
))
1212 error ("literal operator template %q+D conflicts with"
1213 " raw literal operator %qD", newdecl
, olddecl
);
1214 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1215 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1216 && check_raw_literal_operator (newdecl
))
1217 error ("raw literal operator %q+D conflicts with"
1218 " literal operator template %qD", newdecl
, olddecl
);
1221 if (DECL_P (olddecl
)
1222 && TREE_CODE (newdecl
) == FUNCTION_DECL
1223 && TREE_CODE (olddecl
) == FUNCTION_DECL
1224 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1226 if (DECL_DECLARED_INLINE_P (newdecl
)
1227 && DECL_UNINLINABLE (newdecl
)
1228 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1229 /* Already warned elsewhere. */;
1230 else if (DECL_DECLARED_INLINE_P (olddecl
)
1231 && DECL_UNINLINABLE (olddecl
)
1232 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1233 /* Already warned. */;
1234 else if (DECL_DECLARED_INLINE_P (newdecl
)
1235 && DECL_UNINLINABLE (olddecl
)
1236 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1238 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1240 warning (OPT_Wattributes
, "previous declaration of %q+D "
1241 "with attribute noinline", olddecl
);
1243 else if (DECL_DECLARED_INLINE_P (olddecl
)
1244 && DECL_UNINLINABLE (newdecl
)
1245 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1247 warning (OPT_Wattributes
, "function %q+D redeclared with "
1248 "attribute noinline", newdecl
);
1249 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1254 /* Check for redeclaration and other discrepancies. */
1255 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1256 && DECL_ARTIFICIAL (olddecl
))
1258 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1259 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1261 /* Avoid warnings redeclaring built-ins which have not been
1262 explicitly declared. */
1263 if (DECL_ANTICIPATED (olddecl
))
1266 /* If you declare a built-in or predefined function name as static,
1267 the old definition is overridden, but optionally warn this was a
1268 bad choice of name. */
1269 if (! TREE_PUBLIC (newdecl
))
1271 warning (OPT_Wshadow
,
1272 DECL_BUILT_IN (olddecl
)
1273 ? G_("shadowing built-in function %q#D")
1274 : G_("shadowing library function %q#D"), olddecl
);
1275 /* Discard the old built-in function. */
1278 /* If the built-in is not ansi, then programs can override
1279 it even globally without an error. */
1280 else if (! DECL_BUILT_IN (olddecl
))
1281 warning (0, "library function %q#D redeclared as non-function %q#D",
1285 error ("declaration of %q#D", newdecl
);
1286 error ("conflicts with built-in declaration %q#D",
1291 else if (!types_match
)
1293 /* Avoid warnings redeclaring built-ins which have not been
1294 explicitly declared. */
1295 if (DECL_ANTICIPATED (olddecl
))
1297 /* Deal with fileptr_type_node. FILE type is not known
1298 at the time we create the builtins. */
1301 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1302 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1304 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1307 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1309 tree t
= TREE_VALUE (t1
);
1311 if (TREE_CODE (t
) == POINTER_TYPE
1312 && TYPE_NAME (TREE_TYPE (t
))
1313 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1314 == get_identifier ("FILE")
1315 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1317 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1319 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1320 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1321 types_match
= decls_match (newdecl
, olddecl
);
1323 return duplicate_decls (newdecl
, olddecl
,
1325 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1328 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1331 else if ((DECL_EXTERN_C_P (newdecl
)
1332 && DECL_EXTERN_C_P (olddecl
))
1333 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1334 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1336 /* A near match; override the builtin. */
1338 if (TREE_PUBLIC (newdecl
))
1340 warning (0, "new declaration %q#D", newdecl
);
1341 warning (0, "ambiguates built-in declaration %q#D",
1345 warning (OPT_Wshadow
,
1346 DECL_BUILT_IN (olddecl
)
1347 ? G_("shadowing built-in function %q#D")
1348 : G_("shadowing library function %q#D"), olddecl
);
1351 /* Discard the old built-in function. */
1354 /* Replace the old RTL to avoid problems with inlining. */
1355 COPY_DECL_RTL (newdecl
, olddecl
);
1357 /* Even if the types match, prefer the new declarations type for
1358 built-ins which have not been explicitly declared, for
1359 exception lists, etc... */
1360 else if (DECL_IS_BUILTIN (olddecl
))
1362 tree type
= TREE_TYPE (newdecl
);
1363 tree attribs
= (*targetm
.merge_type_attributes
)
1364 (TREE_TYPE (olddecl
), type
);
1366 type
= cp_build_type_attribute_variant (type
, attribs
);
1367 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1370 /* If a function is explicitly declared "throw ()", propagate that to
1371 the corresponding builtin. */
1372 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1373 && DECL_ANTICIPATED (olddecl
)
1374 && TREE_NOTHROW (newdecl
)
1375 && !TREE_NOTHROW (olddecl
))
1377 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1378 tree tmpdecl
= builtin_decl_explicit (fncode
);
1379 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1380 TREE_NOTHROW (tmpdecl
) = 1;
1383 /* Whether or not the builtin can throw exceptions has no
1384 bearing on this declarator. */
1385 TREE_NOTHROW (olddecl
) = 0;
1387 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1389 /* If a builtin function is redeclared as `static', merge
1390 the declarations, but make the original one static. */
1391 DECL_THIS_STATIC (olddecl
) = 1;
1392 TREE_PUBLIC (olddecl
) = 0;
1394 /* Make the old declaration consistent with the new one so
1395 that all remnants of the builtin-ness of this function
1396 will be banished. */
1397 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1398 COPY_DECL_RTL (newdecl
, olddecl
);
1401 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1403 /* C++ Standard, 3.3, clause 4:
1404 "[Note: a namespace name or a class template name must be unique
1405 in its declarative region (7.3.2, clause 14). ]" */
1406 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1407 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1408 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1409 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1410 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1411 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1413 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1414 && TREE_CODE (newdecl
) != TYPE_DECL
)
1415 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1416 && TREE_CODE (olddecl
) != TYPE_DECL
))
1418 /* We do nothing special here, because C++ does such nasty
1419 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1420 get shadowed, and know that if we need to find a TYPE_DECL
1421 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1422 slot of the identifier. */
1426 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1427 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1428 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1429 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1433 error ("%q#D redeclared as different kind of symbol", newdecl
);
1434 if (TREE_CODE (olddecl
) == TREE_LIST
)
1435 olddecl
= TREE_VALUE (olddecl
);
1436 error ("previous declaration of %q+#D", olddecl
);
1438 return error_mark_node
;
1440 else if (!types_match
)
1442 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1443 /* These are certainly not duplicate declarations; they're
1444 from different scopes. */
1447 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1449 /* The name of a class template may not be declared to refer to
1450 any other template, class, function, object, namespace, value,
1451 or type in the same scope. */
1452 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1453 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1455 error ("declaration of template %q#D", newdecl
);
1456 error ("conflicts with previous declaration %q+#D", olddecl
);
1458 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1459 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1460 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1461 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1462 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1463 DECL_TEMPLATE_PARMS (olddecl
))
1464 /* Template functions can be disambiguated by
1466 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1467 TREE_TYPE (TREE_TYPE (olddecl
))))
1469 error ("new declaration %q#D", newdecl
);
1470 error ("ambiguates old declaration %q+#D", olddecl
);
1474 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1476 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1478 error ("declaration of C function %q#D conflicts with",
1480 error ("previous declaration %q+#D here", olddecl
);
1483 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1484 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1486 error ("new declaration %q#D", newdecl
);
1487 error ("ambiguates old declaration %q+#D", olddecl
);
1488 return error_mark_node
;
1495 error ("conflicting declaration %q#D", newdecl
);
1496 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1497 return error_mark_node
;
1500 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1501 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1502 && (!DECL_TEMPLATE_INFO (newdecl
)
1503 || (DECL_TI_TEMPLATE (newdecl
)
1504 != DECL_TI_TEMPLATE (olddecl
))))
1505 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1506 && (!DECL_TEMPLATE_INFO (olddecl
)
1507 || (DECL_TI_TEMPLATE (olddecl
)
1508 != DECL_TI_TEMPLATE (newdecl
))))))
1509 /* It's OK to have a template specialization and a non-template
1510 with the same type, or to have specializations of two
1511 different templates with the same type. Note that if one is a
1512 specialization, and the other is an instantiation of the same
1513 template, that we do not exit at this point. That situation
1514 can occur if we instantiate a template class, and then
1515 specialize one of its methods. This situation is valid, but
1516 the declarations must be merged in the usual way. */
1518 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1519 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1520 && !DECL_USE_TEMPLATE (newdecl
))
1521 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1522 && !DECL_USE_TEMPLATE (olddecl
))))
1523 /* One of the declarations is a template instantiation, and the
1524 other is not a template at all. That's OK. */
1526 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1528 /* In [namespace.alias] we have:
1530 In a declarative region, a namespace-alias-definition can be
1531 used to redefine a namespace-alias declared in that declarative
1532 region to refer only to the namespace to which it already
1535 Therefore, if we encounter a second alias directive for the same
1536 alias, we can just ignore the second directive. */
1537 if (DECL_NAMESPACE_ALIAS (newdecl
)
1538 && (DECL_NAMESPACE_ALIAS (newdecl
)
1539 == DECL_NAMESPACE_ALIAS (olddecl
)))
1541 /* [namespace.alias]
1543 A namespace-name or namespace-alias shall not be declared as
1544 the name of any other entity in the same declarative region.
1545 A namespace-name defined at global scope shall not be
1546 declared as the name of any other entity in any global scope
1548 error ("declaration of namespace %qD conflicts with", newdecl
);
1549 error ("previous declaration of namespace %q+D here", olddecl
);
1550 return error_mark_node
;
1554 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1557 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1558 if (DECL_NAME (olddecl
) != NULL_TREE
)
1559 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1560 ? G_("%q+#D previously defined here")
1561 : G_("%q+#D previously declared here"), olddecl
);
1562 return error_mark_node
;
1564 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1565 && DECL_INITIAL (olddecl
) != NULL_TREE
1566 && !prototype_p (TREE_TYPE (olddecl
))
1567 && prototype_p (TREE_TYPE (newdecl
)))
1569 /* Prototype decl follows defn w/o prototype. */
1570 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1571 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1572 "follows non-prototype definition here");
1574 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1575 || TREE_CODE (olddecl
) == VAR_DECL
)
1576 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1579 If two declarations of the same function or object
1580 specify different linkage-specifications ..., the program
1581 is ill-formed.... Except for functions with C++ linkage,
1582 a function declaration without a linkage specification
1583 shall not precede the first linkage specification for
1584 that function. A function can be declared without a
1585 linkage specification after an explicit linkage
1586 specification has been seen; the linkage explicitly
1587 specified in the earlier declaration is not affected by
1588 such a function declaration.
1590 DR 563 raises the question why the restrictions on
1591 functions should not also apply to objects. Older
1592 versions of G++ silently ignore the linkage-specification
1600 which is clearly wrong. Therefore, we now treat objects
1602 if (current_lang_depth () == 0)
1604 /* There is no explicit linkage-specification, so we use
1605 the linkage from the previous declaration. */
1606 if (!DECL_LANG_SPECIFIC (newdecl
))
1607 retrofit_lang_decl (newdecl
);
1608 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1612 error ("previous declaration of %q+#D with %qL linkage",
1613 olddecl
, DECL_LANGUAGE (olddecl
));
1614 error ("conflicts with new declaration with %qL linkage",
1615 DECL_LANGUAGE (newdecl
));
1619 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1621 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1623 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1624 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1627 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1628 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1630 for (; t1
&& t1
!= void_list_node
;
1631 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1632 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1634 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1637 permerror (input_location
, "default argument given for parameter %d of %q#D",
1639 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1643 error ("default argument given for parameter %d of %q#D",
1645 error ("after previous specification in %q+#D",
1652 /* Do not merge an implicit typedef with an explicit one. In:
1656 typedef class A A __attribute__ ((foo));
1658 the attribute should apply only to the typedef. */
1659 if (TREE_CODE (olddecl
) == TYPE_DECL
1660 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1661 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1664 /* If new decl is `static' and an `extern' was seen previously,
1666 warn_extern_redeclared_static (newdecl
, olddecl
);
1668 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1669 return error_mark_node
;
1671 /* We have committed to returning 1 at this point. */
1672 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1674 /* Now that functions must hold information normally held
1675 by field decls, there is extra work to do so that
1676 declaration information does not get destroyed during
1678 if (DECL_VINDEX (olddecl
))
1679 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1680 if (DECL_CONTEXT (olddecl
))
1681 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1682 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1683 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1684 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1685 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1686 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1687 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1688 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1689 SET_OVERLOADED_OPERATOR_CODE
1690 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1691 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1693 /* Optionally warn about more than one declaration for the same
1694 name, but don't warn about a function declaration followed by a
1696 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1697 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1698 /* Don't warn about extern decl followed by definition. */
1699 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1700 /* Don't warn about friends, let add_friend take care of it. */
1701 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1702 /* Don't warn about declaration followed by specialization. */
1703 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1704 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1706 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1707 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1710 if (DECL_DELETED_FN (newdecl
))
1712 error ("deleted definition of %qD", newdecl
);
1713 error ("after previous declaration %q+D", olddecl
);
1715 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1718 /* Deal with C++: must preserve virtual function table size. */
1719 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1721 tree newtype
= TREE_TYPE (newdecl
);
1722 tree oldtype
= TREE_TYPE (olddecl
);
1724 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1725 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1726 CLASSTYPE_FRIEND_CLASSES (newtype
)
1727 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1729 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1732 /* Copy all the DECL_... slots specified in the new decl
1733 except for any that we copy here from the old type. */
1734 DECL_ATTRIBUTES (newdecl
)
1735 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1737 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1741 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1742 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1743 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1744 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1745 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1746 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1748 DECL_ATTRIBUTES (old_result
)
1749 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1751 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1753 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1754 && DECL_INITIAL (new_result
))
1756 if (DECL_INITIAL (old_result
))
1757 DECL_UNINLINABLE (old_result
) = 1;
1759 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1760 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1761 DECL_NOT_REALLY_EXTERN (old_result
)
1762 = DECL_NOT_REALLY_EXTERN (new_result
);
1763 DECL_INTERFACE_KNOWN (old_result
)
1764 = DECL_INTERFACE_KNOWN (new_result
);
1765 DECL_DECLARED_INLINE_P (old_result
)
1766 = DECL_DECLARED_INLINE_P (new_result
);
1767 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1768 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1773 DECL_DECLARED_INLINE_P (old_result
)
1774 |= DECL_DECLARED_INLINE_P (new_result
);
1775 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1776 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1777 check_redeclaration_exception_specification (newdecl
, olddecl
);
1781 /* If the new declaration is a definition, update the file and
1782 line information on the declaration, and also make
1783 the old declaration the same definition. */
1784 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1786 DECL_SOURCE_LOCATION (olddecl
)
1787 = DECL_SOURCE_LOCATION (old_result
)
1788 = DECL_SOURCE_LOCATION (newdecl
);
1789 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1790 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1793 DECL_ARGUMENTS (old_result
)
1794 = DECL_ARGUMENTS (new_result
);
1795 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1796 parm
= DECL_CHAIN (parm
))
1797 DECL_CONTEXT (parm
) = old_result
;
1806 /* Automatically handles default parameters. */
1807 tree oldtype
= TREE_TYPE (olddecl
);
1810 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1811 maybe_instantiate_noexcept (olddecl
);
1813 /* Merge the data types specified in the two decls. */
1814 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1816 /* If merge_types produces a non-typedef type, just use the old type. */
1817 if (TREE_CODE (newdecl
) == TYPE_DECL
1818 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1821 if (TREE_CODE (newdecl
) == VAR_DECL
)
1823 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1824 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1825 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1826 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1827 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1828 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1830 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1831 if (DECL_LANG_SPECIFIC (olddecl
)
1832 && CP_DECL_THREADPRIVATE_P (olddecl
))
1834 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1835 if (!DECL_LANG_SPECIFIC (newdecl
))
1836 retrofit_lang_decl (newdecl
);
1838 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1839 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1843 /* Do this after calling `merge_types' so that default
1844 parameters don't confuse us. */
1845 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1846 check_redeclaration_exception_specification (newdecl
, olddecl
);
1847 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1849 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1850 check_default_args (newdecl
);
1852 /* Lay the type out, unless already done. */
1853 if (! same_type_p (newtype
, oldtype
)
1854 && TREE_TYPE (newdecl
) != error_mark_node
1855 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1856 layout_type (TREE_TYPE (newdecl
));
1858 if ((TREE_CODE (newdecl
) == VAR_DECL
1859 || TREE_CODE (newdecl
) == PARM_DECL
1860 || TREE_CODE (newdecl
) == RESULT_DECL
1861 || TREE_CODE (newdecl
) == FIELD_DECL
1862 || TREE_CODE (newdecl
) == TYPE_DECL
)
1863 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1864 layout_decl (newdecl
, 0);
1866 /* Merge the type qualifiers. */
1867 if (TREE_READONLY (newdecl
))
1868 TREE_READONLY (olddecl
) = 1;
1869 if (TREE_THIS_VOLATILE (newdecl
))
1870 TREE_THIS_VOLATILE (olddecl
) = 1;
1871 if (TREE_NOTHROW (newdecl
))
1872 TREE_NOTHROW (olddecl
) = 1;
1874 /* Merge deprecatedness. */
1875 if (TREE_DEPRECATED (newdecl
))
1876 TREE_DEPRECATED (olddecl
) = 1;
1878 /* Preserve function specific target and optimization options */
1879 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1881 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1882 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1883 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1884 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1886 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1887 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1888 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1889 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1892 /* Merge the initialization information. */
1893 if (DECL_INITIAL (newdecl
) == NULL_TREE
1894 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1896 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1897 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1898 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1900 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1901 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1905 /* Merge the section attribute.
1906 We want to issue an error if the sections conflict but that must be
1907 done later in decl_attributes since we are called before attributes
1909 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1910 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1912 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1914 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1915 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1916 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1917 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1918 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1919 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1920 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1921 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1922 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1923 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1924 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1925 /* Keep the old RTL. */
1926 COPY_DECL_RTL (olddecl
, newdecl
);
1928 else if (TREE_CODE (newdecl
) == VAR_DECL
1929 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1931 /* Keep the old RTL. We cannot keep the old RTL if the old
1932 declaration was for an incomplete object and the new
1933 declaration is not since many attributes of the RTL will
1935 COPY_DECL_RTL (olddecl
, newdecl
);
1938 /* If cannot merge, then use the new type and qualifiers,
1939 and don't preserve the old rtl. */
1942 /* Clean out any memory we had of the old declaration. */
1943 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1945 TREE_VALUE (oldstatic
) = error_mark_node
;
1947 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1948 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1949 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1950 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1953 /* Merge the storage class information. */
1954 merge_weak (newdecl
, olddecl
);
1956 if (DECL_ONE_ONLY (olddecl
))
1957 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
1959 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1960 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1961 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1962 if (! DECL_EXTERNAL (olddecl
))
1963 DECL_EXTERNAL (newdecl
) = 0;
1965 new_template_info
= NULL_TREE
;
1966 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1968 bool new_redefines_gnu_inline
= false;
1970 if (new_defines_function
1971 && ((DECL_INTERFACE_KNOWN (olddecl
)
1972 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1973 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1974 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1975 == FUNCTION_DECL
))))
1979 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1980 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1982 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1985 if (!new_redefines_gnu_inline
)
1987 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1988 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1989 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1991 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1992 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1993 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
1995 /* If the OLDDECL is an instantiation and/or specialization,
1996 then the NEWDECL must be too. But, it may not yet be marked
1997 as such if the caller has created NEWDECL, but has not yet
1998 figured out that it is a redeclaration. */
1999 if (!DECL_USE_TEMPLATE (newdecl
))
2000 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2002 /* Don't really know how much of the language-specific
2003 values we should copy from old to new. */
2004 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2005 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2006 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2007 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2009 if (LANG_DECL_HAS_MIN (newdecl
))
2011 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2012 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2013 if (DECL_TEMPLATE_INFO (newdecl
))
2014 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2015 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2017 /* Only functions have these fields. */
2018 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2019 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
2021 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2022 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2023 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2024 && DECL_HIDDEN_FRIEND_P (olddecl
)
2025 && newdecl_is_friend
);
2026 DECL_BEFRIENDING_CLASSES (newdecl
)
2027 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2028 DECL_BEFRIENDING_CLASSES (olddecl
));
2029 /* DECL_THUNKS is only valid for virtual functions,
2030 otherwise it is a DECL_FRIEND_CONTEXT. */
2031 if (DECL_VIRTUAL_P (newdecl
))
2032 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
2034 /* Only variables have this field. */
2035 else if (TREE_CODE (newdecl
) == VAR_DECL
2036 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2037 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2040 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2044 /* Merge parameter attributes. */
2045 tree oldarg
, newarg
;
2046 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2047 newarg
= DECL_ARGUMENTS(newdecl
);
2049 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2050 DECL_ATTRIBUTES (newarg
)
2051 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2052 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2055 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2056 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2058 /* If newdecl is not a specialization, then it is not a
2059 template-related function at all. And that means that we
2060 should have exited above, returning 0. */
2061 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2063 if (DECL_ODR_USED (olddecl
))
2064 /* From [temp.expl.spec]:
2066 If a template, a member template or the member of a class
2067 template is explicitly specialized then that
2068 specialization shall be declared before the first use of
2069 that specialization that would cause an implicit
2070 instantiation to take place, in every translation unit in
2071 which such a use occurs. */
2072 error ("explicit specialization of %qD after first use",
2075 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2077 /* Don't propagate visibility from the template to the
2078 specialization here. We'll do that in determine_visibility if
2080 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2082 /* [temp.expl.spec/14] We don't inline explicit specialization
2083 just because the primary template says so. */
2085 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2086 the always_inline attribute. */
2087 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2088 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2090 if (DECL_DECLARED_INLINE_P (newdecl
))
2091 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2093 DECL_ATTRIBUTES (newdecl
)
2094 = remove_attribute ("always_inline",
2095 DECL_ATTRIBUTES (newdecl
));
2098 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2100 /* Never inline re-defined extern inline functions.
2101 FIXME: this could be better handled by keeping both
2102 function as separate declarations. */
2103 DECL_UNINLINABLE (newdecl
) = 1;
2107 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2108 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2110 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2112 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2113 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2115 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2116 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2117 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2118 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2121 /* Preserve abstractness on cloned [cd]tors. */
2122 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2124 /* Update newdecl's parms to point at olddecl. */
2125 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2126 parm
= DECL_CHAIN (parm
))
2127 DECL_CONTEXT (parm
) = olddecl
;
2131 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2132 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2133 COPY_DECL_RTL (newdecl
, olddecl
);
2135 if (! types_match
|| new_defines_function
)
2137 /* These need to be copied so that the names are available.
2138 Note that if the types do match, we'll preserve inline
2139 info and other bits, but if not, we won't. */
2140 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2141 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2143 if (new_defines_function
)
2144 /* If defining a function declared with other language
2145 linkage, use the previously declared language linkage. */
2146 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2147 else if (types_match
)
2149 /* If redeclaring a builtin function, and not a definition,
2150 it stays built in. */
2151 if (DECL_BUILT_IN (olddecl
))
2153 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2154 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2155 /* If we're keeping the built-in definition, keep the rtl,
2156 regardless of declaration matches. */
2157 COPY_DECL_RTL (olddecl
, newdecl
);
2158 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2160 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2163 /* If a compatible prototype of these builtin functions
2164 is seen, assume the runtime implements it with the
2165 expected semantics. */
2166 case BUILT_IN_STPCPY
:
2167 if (builtin_decl_explicit_p (fncode
))
2168 set_builtin_decl_implicit_p (fncode
, true);
2176 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2177 /* Don't clear out the arguments if we're just redeclaring a
2179 if (DECL_ARGUMENTS (olddecl
))
2180 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2183 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2184 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2186 /* Now preserve various other info from the definition. */
2187 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2188 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2189 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2190 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2192 /* Warn about conflicting visibility specifications. */
2193 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2194 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2195 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2197 warning_at (input_location
, OPT_Wattributes
,
2198 "%q+D: visibility attribute ignored because it", newdecl
);
2199 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2200 "conflicts with previous declaration here");
2202 /* Choose the declaration which specified visibility. */
2203 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2205 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2206 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2208 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2209 so keep this behavior. */
2210 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2212 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2213 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2215 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2216 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2217 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2218 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2220 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2221 with that from NEWDECL below. */
2222 if (DECL_LANG_SPECIFIC (olddecl
))
2224 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2225 != DECL_LANG_SPECIFIC (newdecl
));
2226 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2229 /* Merge the USED information. */
2230 if (TREE_USED (olddecl
))
2231 TREE_USED (newdecl
) = 1;
2232 else if (TREE_USED (newdecl
))
2233 TREE_USED (olddecl
) = 1;
2234 if (TREE_CODE (newdecl
) == VAR_DECL
)
2236 if (DECL_READ_P (olddecl
))
2237 DECL_READ_P (newdecl
) = 1;
2238 else if (DECL_READ_P (newdecl
))
2239 DECL_READ_P (olddecl
) = 1;
2241 if (DECL_PRESERVE_P (olddecl
))
2242 DECL_PRESERVE_P (newdecl
) = 1;
2243 else if (DECL_PRESERVE_P (newdecl
))
2244 DECL_PRESERVE_P (olddecl
) = 1;
2246 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2250 function_size
= sizeof (struct tree_decl_common
);
2252 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2253 (char *) newdecl
+ sizeof (struct tree_common
),
2254 function_size
- sizeof (struct tree_common
));
2256 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2257 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2258 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2259 if (new_template_info
)
2260 /* If newdecl is a template instantiation, it is possible that
2261 the following sequence of events has occurred:
2263 o A friend function was declared in a class template. The
2264 class template was instantiated.
2266 o The instantiation of the friend declaration was
2267 recorded on the instantiation list, and is newdecl.
2269 o Later, however, instantiate_class_template called pushdecl
2270 on the newdecl to perform name injection. But, pushdecl in
2271 turn called duplicate_decls when it discovered that another
2272 declaration of a global function with the same name already
2275 o Here, in duplicate_decls, we decided to clobber newdecl.
2277 If we're going to do that, we'd better make sure that
2278 olddecl, and not newdecl, is on the list of
2279 instantiations so that if we try to do the instantiation
2280 again we won't get the clobbered declaration. */
2281 reregister_specialization (newdecl
,
2287 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2288 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2289 (char *) newdecl
+ sizeof (struct tree_common
),
2290 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2291 switch (TREE_CODE (olddecl
))
2301 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2302 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2303 size
- sizeof (struct tree_decl_common
)
2304 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2308 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2309 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2310 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2311 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2315 DECL_UID (olddecl
) = olddecl_uid
;
2317 DECL_FRIEND_P (olddecl
) = 1;
2320 DECL_ANTICIPATED (olddecl
) = 1;
2321 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2324 /* NEWDECL contains the merged attribute lists.
2325 Update OLDDECL to be the same. */
2326 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2328 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2329 so that encode_section_info has a chance to look at the new decl
2330 flags and attributes. */
2331 if (DECL_RTL_SET_P (olddecl
)
2332 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2333 || (TREE_CODE (olddecl
) == VAR_DECL
2334 && TREE_STATIC (olddecl
))))
2335 make_decl_rtl (olddecl
);
2337 /* The NEWDECL will no longer be needed. Because every out-of-class
2338 declaration of a member results in a call to duplicate_decls,
2339 freeing these nodes represents in a significant savings. */
2345 /* Return zero if the declaration NEWDECL is valid
2346 when the declaration OLDDECL (assumed to be for the same name)
2347 has already been seen.
2348 Otherwise return an error message format string with a %s
2349 where the identifier should go. */
2352 redeclaration_error_message (tree newdecl
, tree olddecl
)
2354 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2356 /* Because C++ can put things into name space for free,
2357 constructs like "typedef struct foo { ... } foo"
2358 would look like an erroneous redeclaration. */
2359 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2362 return G_("redefinition of %q#D");
2364 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2366 /* If this is a pure function, its olddecl will actually be
2367 the original initialization to `0' (which we force to call
2368 abort()). Don't complain about redefinition in this case. */
2369 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2370 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2373 /* If both functions come from different namespaces, this is not
2374 a redeclaration - this is a conflict with a used function. */
2375 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2376 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2377 && ! decls_match (olddecl
, newdecl
))
2378 return G_("%qD conflicts with used function");
2380 /* We'll complain about linkage mismatches in
2381 warn_extern_redeclared_static. */
2383 /* Defining the same name twice is no good. */
2384 if (DECL_INITIAL (olddecl
) != NULL_TREE
2385 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2387 if (DECL_NAME (olddecl
) == NULL_TREE
)
2388 return G_("%q#D not declared in class");
2389 else if (!GNU_INLINE_P (olddecl
)
2390 || GNU_INLINE_P (newdecl
))
2391 return G_("redefinition of %q#D");
2394 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2396 bool olda
= GNU_INLINE_P (olddecl
);
2397 bool newa
= GNU_INLINE_P (newdecl
);
2402 return G_("%q+D redeclared inline with "
2403 "%<gnu_inline%> attribute");
2405 return G_("%q+D redeclared inline without "
2406 "%<gnu_inline%> attribute");
2412 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2416 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2418 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2419 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2420 return G_("redefinition of %q#D");
2424 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2425 || (DECL_TEMPLATE_RESULT (newdecl
)
2426 == DECL_TEMPLATE_RESULT (olddecl
)))
2429 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2430 if (DECL_TEMPLATE_INFO (nt
))
2431 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2432 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2433 if (DECL_TEMPLATE_INFO (ot
))
2434 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2435 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2436 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2437 return G_("redefinition of %q#D");
2439 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2441 bool olda
= GNU_INLINE_P (ot
);
2442 bool newa
= GNU_INLINE_P (nt
);
2447 return G_("%q+D redeclared inline with "
2448 "%<gnu_inline%> attribute");
2450 return G_("%q+D redeclared inline without "
2451 "%<gnu_inline%> attribute");
2455 /* Core issue #226 (C++0x):
2457 If a friend function template declaration specifies a
2458 default template-argument, that declaration shall be a
2459 definition and shall be the only declaration of the
2460 function template in the translation unit. */
2461 if ((cxx_dialect
!= cxx98
)
2462 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2463 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2464 /*is_primary=*/1, /*is_partial=*/0,
2465 /*is_friend_decl=*/2))
2466 return G_("redeclaration of friend %q#D "
2467 "may not have default template arguments");
2471 else if (TREE_CODE (newdecl
) == VAR_DECL
2472 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2473 && (! DECL_LANG_SPECIFIC (olddecl
)
2474 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2475 || DECL_THREAD_LOCAL_P (newdecl
)))
2477 /* Only variables can be thread-local, and all declarations must
2478 agree on this property. */
2479 if (DECL_THREAD_LOCAL_P (newdecl
))
2480 return G_("thread-local declaration of %q#D follows "
2481 "non-thread-local declaration");
2483 return G_("non-thread-local declaration of %q#D follows "
2484 "thread-local declaration");
2486 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2488 /* The objects have been declared at namespace scope. If either
2489 is a member of an anonymous union, then this is an invalid
2490 redeclaration. For example:
2496 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2497 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2498 return G_("redeclaration of %q#D");
2499 /* If at least one declaration is a reference, there is no
2500 conflict. For example:
2506 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2508 /* Reject two definitions. */
2509 return G_("redefinition of %q#D");
2513 /* Objects declared with block scope: */
2514 /* Reject two definitions, and reject a definition
2515 together with an external reference. */
2516 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2517 return G_("redeclaration of %q#D");
2522 /* Hash and equality functions for the named_label table. */
2525 named_label_entry_hash (const void *data
)
2527 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2528 return DECL_UID (ent
->label_decl
);
2532 named_label_entry_eq (const void *a
, const void *b
)
2534 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2535 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2536 return ent_a
->label_decl
== ent_b
->label_decl
;
2539 /* Create a new label, named ID. */
2542 make_label_decl (tree id
, int local_p
)
2544 struct named_label_entry
*ent
;
2548 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2550 DECL_CONTEXT (decl
) = current_function_decl
;
2551 DECL_MODE (decl
) = VOIDmode
;
2552 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2554 /* Say where one reference is to the label, for the sake of the
2555 error if it is not defined. */
2556 DECL_SOURCE_LOCATION (decl
) = input_location
;
2558 /* Record the fact that this identifier is bound to this label. */
2559 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2561 /* Create the label htab for the function on demand. */
2563 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2564 named_label_entry_eq
, NULL
);
2566 /* Record this label on the list of labels used in this function.
2567 We do this before calling make_label_decl so that we get the
2568 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2569 ent
= ggc_alloc_cleared_named_label_entry ();
2570 ent
->label_decl
= decl
;
2572 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2573 gcc_assert (*slot
== NULL
);
2579 /* Look for a label named ID in the current function. If one cannot
2580 be found, create one. (We keep track of used, but undefined,
2581 labels, and complain about them at the end of a function.) */
2584 lookup_label_1 (tree id
)
2588 /* You can't use labels at global scope. */
2589 if (current_function_decl
== NULL_TREE
)
2591 error ("label %qE referenced outside of any function", id
);
2595 /* See if we've already got this label. */
2596 decl
= IDENTIFIER_LABEL_VALUE (id
);
2597 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2600 decl
= make_label_decl (id
, /*local_p=*/0);
2604 /* Wrapper for lookup_label_1. */
2607 lookup_label (tree id
)
2610 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2611 ret
= lookup_label_1 (id
);
2612 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2616 /* Declare a local label named ID. */
2619 declare_local_label (tree id
)
2622 cp_label_binding
*bind
;
2624 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2625 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2626 bind
= VEC_safe_push (cp_label_binding
, gc
,
2627 current_binding_level
->shadowed_labels
, NULL
);
2628 bind
->prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2630 decl
= make_label_decl (id
, /*local_p=*/1);
2636 /* Returns nonzero if it is ill-formed to jump past the declaration of
2637 DECL. Returns 2 if it's also a real problem. */
2640 decl_jump_unsafe (tree decl
)
2642 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2643 with automatic storage duration is not in scope to a point where it is
2644 in scope is ill-formed unless the variable has scalar type, class type
2645 with a trivial default constructor and a trivial destructor, a
2646 cv-qualified version of one of these types, or an array of one of the
2647 preceding types and is declared without an initializer (8.5). */
2648 tree type
= TREE_TYPE (decl
);
2650 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2651 || type
== error_mark_node
)
2654 type
= strip_array_types (type
);
2656 if (type_has_nontrivial_default_init (TREE_TYPE (decl
))
2657 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2660 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2666 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2669 identify_goto (tree decl
, const location_t
*locus
)
2672 permerror (input_location
, "jump to label %qD", decl
);
2674 permerror (input_location
, "jump to case label");
2676 permerror (*locus
, " from here");
2679 /* Check that a single previously seen jump to a newly defined label
2680 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2681 the jump context; NAMES are the names in scope in LEVEL at the jump
2682 context; LOCUS is the source position of the jump or 0. Returns
2683 true if all is well. */
2686 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2687 bool exited_omp
, const location_t
*locus
)
2689 cp_binding_level
*b
;
2690 bool identified
= false, saw_eh
= false, saw_omp
= false;
2694 identify_goto (decl
, locus
);
2695 error (" exits OpenMP structured block");
2696 identified
= saw_omp
= true;
2699 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2701 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2703 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2704 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2705 : TREE_CHAIN (new_decls
)))
2707 int problem
= decl_jump_unsafe (new_decls
);
2713 identify_goto (decl
, locus
);
2717 error (" crosses initialization of %q+#D", new_decls
);
2719 permerror (input_location
, " enters scope of %q+#D which has "
2720 "non-trivial destructor", new_decls
);
2725 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2729 identify_goto (decl
, locus
);
2732 if (b
->kind
== sk_try
)
2733 error (" enters try block");
2735 error (" enters catch block");
2738 if (b
->kind
== sk_omp
&& !saw_omp
)
2742 identify_goto (decl
, locus
);
2745 error (" enters OpenMP structured block");
2754 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2756 check_previous_goto_1 (decl
, use
->binding_level
,
2757 use
->names_in_scope
, use
->in_omp_scope
,
2758 &use
->o_goto_locus
);
2762 check_switch_goto (cp_binding_level
* level
)
2764 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2767 /* Check that a new jump to a label DECL is OK. Called by
2768 finish_goto_stmt. */
2771 check_goto (tree decl
)
2773 struct named_label_entry
*ent
, dummy
;
2774 bool saw_catch
= false, identified
= false;
2778 /* We can't know where a computed goto is jumping.
2779 So we assume that it's OK. */
2780 if (TREE_CODE (decl
) != LABEL_DECL
)
2783 /* We didn't record any information about this label when we created it,
2784 and there's not much point since it's trivial to analyze as a return. */
2785 if (decl
== cdtor_label
)
2788 dummy
.label_decl
= decl
;
2789 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2790 gcc_assert (ent
!= NULL
);
2792 /* If the label hasn't been defined yet, defer checking. */
2793 if (! DECL_INITIAL (decl
))
2795 struct named_label_use_entry
*new_use
;
2797 /* Don't bother creating another use if the last goto had the
2798 same data, and will therefore create the same set of errors. */
2800 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2803 new_use
= ggc_alloc_named_label_use_entry ();
2804 new_use
->binding_level
= current_binding_level
;
2805 new_use
->names_in_scope
= current_binding_level
->names
;
2806 new_use
->o_goto_locus
= input_location
;
2807 new_use
->in_omp_scope
= false;
2809 new_use
->next
= ent
->uses
;
2810 ent
->uses
= new_use
;
2814 if (ent
->in_try_scope
|| ent
->in_catch_scope
2815 || ent
->in_omp_scope
|| !VEC_empty (tree
, ent
->bad_decls
))
2817 permerror (input_location
, "jump to label %q+D", decl
);
2818 permerror (input_location
, " from here");
2822 FOR_EACH_VEC_ELT (tree
, ent
->bad_decls
, ix
, bad
)
2824 int u
= decl_jump_unsafe (bad
);
2826 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2828 /* Can't skip init of __exception_info. */
2829 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2833 error (" skips initialization of %q+#D", bad
);
2835 permerror (input_location
, " enters scope of %q+#D which has "
2836 "non-trivial destructor", bad
);
2839 if (ent
->in_try_scope
)
2840 error (" enters try block");
2841 else if (ent
->in_catch_scope
&& !saw_catch
)
2842 error (" enters catch block");
2844 if (ent
->in_omp_scope
)
2845 error (" enters OpenMP structured block");
2846 else if (flag_openmp
)
2848 cp_binding_level
*b
;
2849 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2851 if (b
== ent
->binding_level
)
2853 if (b
->kind
== sk_omp
)
2857 permerror (input_location
, "jump to label %q+D", decl
);
2858 permerror (input_location
, " from here");
2861 error (" exits OpenMP structured block");
2868 /* Check that a return is ok wrt OpenMP structured blocks.
2869 Called by finish_return_stmt. Returns true if all is well. */
2872 check_omp_return (void)
2874 cp_binding_level
*b
;
2875 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2876 if (b
->kind
== sk_omp
)
2878 error ("invalid exit from OpenMP structured block");
2881 else if (b
->kind
== sk_function_parms
)
2886 /* Define a label, specifying the location in the source file.
2887 Return the LABEL_DECL node for the label. */
2890 define_label_1 (location_t location
, tree name
)
2892 struct named_label_entry
*ent
, dummy
;
2893 cp_binding_level
*p
;
2896 decl
= lookup_label (name
);
2898 dummy
.label_decl
= decl
;
2899 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2900 gcc_assert (ent
!= NULL
);
2902 /* After labels, make any new cleanups in the function go into their
2903 own new (temporary) binding contour. */
2904 for (p
= current_binding_level
;
2905 p
->kind
!= sk_function_parms
;
2907 p
->more_cleanups_ok
= 0;
2909 if (name
== get_identifier ("wchar_t"))
2910 permerror (input_location
, "label named wchar_t");
2912 if (DECL_INITIAL (decl
) != NULL_TREE
)
2914 error ("duplicate label %qD", decl
);
2915 return error_mark_node
;
2919 struct named_label_use_entry
*use
;
2921 /* Mark label as having been defined. */
2922 DECL_INITIAL (decl
) = error_mark_node
;
2923 /* Say where in the source. */
2924 DECL_SOURCE_LOCATION (decl
) = location
;
2926 ent
->binding_level
= current_binding_level
;
2927 ent
->names_in_scope
= current_binding_level
->names
;
2929 for (use
= ent
->uses
; use
; use
= use
->next
)
2930 check_previous_goto (decl
, use
);
2937 /* Wrapper for define_label_1. */
2940 define_label (location_t location
, tree name
)
2943 timevar_start (TV_NAME_LOOKUP
);
2944 ret
= define_label_1 (location
, name
);
2945 timevar_stop (TV_NAME_LOOKUP
);
2952 cp_binding_level
*level
;
2953 struct cp_switch
*next
;
2954 /* The SWITCH_STMT being built. */
2956 /* A splay-tree mapping the low element of a case range to the high
2957 element, or NULL_TREE if there is no high element. Used to
2958 determine whether or not a new case label duplicates an old case
2959 label. We need a tree, rather than simply a hash table, because
2960 of the GNU case range extension. */
2964 /* A stack of the currently active switch statements. The innermost
2965 switch statement is on the top of the stack. There is no need to
2966 mark the stack for garbage collection because it is only active
2967 during the processing of the body of a function, and we never
2968 collect at that point. */
2970 static struct cp_switch
*switch_stack
;
2972 /* Called right after a switch-statement condition is parsed.
2973 SWITCH_STMT is the switch statement being parsed. */
2976 push_switch (tree switch_stmt
)
2978 struct cp_switch
*p
= XNEW (struct cp_switch
);
2979 p
->level
= current_binding_level
;
2980 p
->next
= switch_stack
;
2981 p
->switch_stmt
= switch_stmt
;
2982 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2989 struct cp_switch
*cs
= switch_stack
;
2990 location_t switch_location
;
2992 /* Emit warnings as needed. */
2993 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
2994 if (!processing_template_decl
)
2995 c_do_switch_warnings (cs
->cases
, switch_location
,
2996 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2997 SWITCH_STMT_COND (cs
->switch_stmt
));
2999 splay_tree_delete (cs
->cases
);
3000 switch_stack
= switch_stack
->next
;
3004 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3005 condition. Note that if TYPE and VALUE are already integral we don't
3006 really do the conversion because the language-independent
3007 warning/optimization code will work better that way. */
3010 case_conversion (tree type
, tree value
)
3012 if (value
== NULL_TREE
)
3015 if (cxx_dialect
>= cxx0x
3016 && (SCOPED_ENUM_P (type
)
3017 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3019 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3020 type
= type_promotes_to (type
);
3021 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3023 return cxx_constant_value (value
);
3026 /* Note that we've seen a definition of a case label, and complain if this
3027 is a bad place for one. */
3030 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3033 cp_binding_level
*p
;
3036 if (processing_template_decl
)
3040 /* For templates, just add the case label; we'll do semantic
3041 analysis at instantiation-time. */
3042 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3043 return add_stmt (build_case_label (low_value
, high_value
, label
));
3046 /* Find the condition on which this switch statement depends. */
3047 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3048 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3049 cond
= TREE_VALUE (cond
);
3051 if (!check_switch_goto (switch_stack
->level
))
3052 return error_mark_node
;
3054 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3056 low_value
= case_conversion (type
, low_value
);
3057 high_value
= case_conversion (type
, high_value
);
3059 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3060 low_value
, high_value
);
3062 /* After labels, make any new cleanups in the function go into their
3063 own new (temporary) binding contour. */
3064 for (p
= current_binding_level
;
3065 p
->kind
!= sk_function_parms
;
3067 p
->more_cleanups_ok
= 0;
3072 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3075 typename_hash (const void* k
)
3078 const_tree
const t
= (const_tree
) k
;
3080 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3081 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3086 typedef struct typename_info
{
3094 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3095 really of type `typename_info*' */
3098 typename_compare (const void * k1
, const void * k2
)
3100 const_tree
const t1
= (const_tree
) k1
;
3101 const typename_info
*const t2
= (const typename_info
*) k2
;
3103 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3104 && TYPE_CONTEXT (t1
) == t2
->scope
3105 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3106 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3107 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3110 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3111 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3113 Returns the new TYPENAME_TYPE. */
3115 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3118 build_typename_type (tree context
, tree name
, tree fullname
,
3119 enum tag_types tag_type
)
3127 if (typename_htab
== NULL
)
3128 typename_htab
= htab_create_ggc (61, &typename_hash
,
3129 &typename_compare
, NULL
);
3131 ti
.scope
= FROB_CONTEXT (context
);
3133 ti
.template_id
= fullname
;
3134 ti
.enum_p
= tag_type
== enum_type
;
3135 ti
.class_p
= (tag_type
== class_type
3136 || tag_type
== record_type
3137 || tag_type
== union_type
);
3138 hash
= (htab_hash_pointer (ti
.scope
)
3139 ^ htab_hash_pointer (ti
.name
));
3141 /* See if we already have this type. */
3142 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3147 /* Build the TYPENAME_TYPE. */
3148 t
= cxx_make_type (TYPENAME_TYPE
);
3149 TYPE_CONTEXT (t
) = ti
.scope
;
3150 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3151 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3152 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3154 /* Build the corresponding TYPE_DECL. */
3155 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3156 TYPE_NAME (TREE_TYPE (d
)) = d
;
3157 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3158 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3159 DECL_ARTIFICIAL (d
) = 1;
3161 /* Store it in the hash table. */
3164 /* TYPENAME_TYPEs must always be compared structurally, because
3165 they may or may not resolve down to another type depending on
3166 the currently open classes. */
3167 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3173 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3174 provided to name the type. Returns an appropriate type, unless an
3175 error occurs, in which case error_mark_node is returned. If we
3176 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3177 return that, rather than the _TYPE it corresponds to, in other
3178 cases we look through the type decl. If TF_ERROR is set, complain
3179 about errors, otherwise be quiet. */
3182 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3183 tsubst_flags_t complain
)
3189 if (name
== error_mark_node
3190 || context
== NULL_TREE
3191 || context
== error_mark_node
)
3192 return error_mark_node
;
3196 if (!(TYPE_LANG_SPECIFIC (name
)
3197 && (CLASSTYPE_IS_TEMPLATE (name
)
3198 || CLASSTYPE_USE_TEMPLATE (name
))))
3199 name
= TYPE_IDENTIFIER (name
);
3201 /* Create a TEMPLATE_ID_EXPR for the type. */
3202 name
= build_nt (TEMPLATE_ID_EXPR
,
3203 CLASSTYPE_TI_TEMPLATE (name
),
3204 CLASSTYPE_TI_ARGS (name
));
3206 else if (TREE_CODE (name
) == TYPE_DECL
)
3207 name
= DECL_NAME (name
);
3211 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3213 name
= TREE_OPERAND (name
, 0);
3214 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3215 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3216 else if (TREE_CODE (name
) == OVERLOAD
)
3218 error ("%qD is not a type", name
);
3219 return error_mark_node
;
3222 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3224 error ("%qD used without template parameters", name
);
3225 return error_mark_node
;
3227 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3228 gcc_assert (TYPE_P (context
));
3230 if (!MAYBE_CLASS_TYPE_P (context
))
3232 if (complain
& tf_error
)
3233 error ("%q#T is not a class", context
);
3234 return error_mark_node
;
3237 /* When the CONTEXT is a dependent type, NAME could refer to a
3238 dependent base class of CONTEXT. But look inside it anyway
3239 if CONTEXT is a currently open scope, in case it refers to a
3240 member of the current instantiation or a non-dependent base;
3241 lookup will stop when we hit a dependent base. */
3242 if (!dependent_scope_p (context
))
3243 /* We should only set WANT_TYPE when we're a nested typename type.
3244 Then we can give better diagnostics if we find a non-type. */
3245 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3249 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3250 return build_typename_type (context
, name
, fullname
, tag_type
);
3252 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3256 if (complain
& tf_error
)
3257 error (want_template
? G_("no class template named %q#T in %q#T")
3258 : G_("no type named %q#T in %q#T"), name
, context
);
3259 return error_mark_node
;
3262 /* Pull out the template from an injected-class-name (or multiple). */
3264 t
= maybe_get_template_decl_from_type_decl (t
);
3266 if (TREE_CODE (t
) == TREE_LIST
)
3268 if (complain
& tf_error
)
3270 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3271 print_candidates (t
);
3273 return error_mark_node
;
3276 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3278 if (complain
& tf_error
)
3279 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3281 return error_mark_node
;
3283 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3285 if (complain
& tf_error
)
3286 error ("%<typename %T::%D%> names %q#T, which is not a type",
3288 return error_mark_node
;
3291 if (complain
& tf_error
)
3292 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3294 /* If we are currently parsing a template and if T is a typedef accessed
3295 through CONTEXT then we need to remember and check access of T at
3296 template instantiation time. */
3297 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3300 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3302 /*entering_scope=*/0,
3303 tf_warning_or_error
| tf_user
);
3305 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3311 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3312 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3313 in which case error_mark_node is returned.
3315 If PARM_LIST is non-NULL, also make sure that the template parameter
3316 list of TEMPLATE_DECL matches.
3318 If COMPLAIN zero, don't complain about any errors that occur. */
3321 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3322 tsubst_flags_t complain
)
3328 name
= TYPE_IDENTIFIER (name
);
3329 else if (DECL_P (name
))
3330 name
= DECL_NAME (name
);
3331 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3333 if (!dependent_type_p (context
)
3334 || currently_open_class (context
))
3336 tree tmpl
= NULL_TREE
;
3338 if (MAYBE_CLASS_TYPE_P (context
))
3339 tmpl
= lookup_field (context
, name
, 0, false);
3341 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3342 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3344 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3346 if (complain
& tf_error
)
3347 error ("no class template named %q#T in %q#T", name
, context
);
3348 return error_mark_node
;
3352 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3354 if (complain
& tf_error
)
3356 error ("template parameters do not match template");
3357 error ("%q+D declared here", tmpl
);
3359 return error_mark_node
;
3362 if (complain
& tf_error
)
3363 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3368 /* Build the UNBOUND_CLASS_TEMPLATE. */
3369 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3370 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3371 TREE_TYPE (t
) = NULL_TREE
;
3372 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3374 /* Build the corresponding TEMPLATE_DECL. */
3375 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3376 TYPE_NAME (TREE_TYPE (d
)) = d
;
3377 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3378 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3379 DECL_ARTIFICIAL (d
) = 1;
3380 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3387 /* Push the declarations of builtin types into the namespace.
3388 RID_INDEX is the index of the builtin type in the array
3389 RID_POINTERS. NAME is the name used when looking up the builtin
3390 type. TYPE is the _TYPE node for the builtin type. */
3393 record_builtin_type (enum rid rid_index
,
3397 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3398 tree tdecl
= NULL_TREE
;
3400 if ((int) rid_index
< (int) RID_MAX
)
3401 rname
= ridpointers
[(int) rid_index
];
3403 tname
= get_identifier (name
);
3405 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3406 eliminated. Built-in types should not be looked up name; their
3407 names are keywords that the parser can recognize. However, there
3408 is code in c-common.c that uses identifier_global_value to look
3409 up built-in types by name. */
3412 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3413 DECL_ARTIFICIAL (tdecl
) = 1;
3414 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3420 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3421 DECL_ARTIFICIAL (tdecl
) = 1;
3423 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3426 if (!TYPE_NAME (type
))
3427 TYPE_NAME (type
) = tdecl
;
3430 debug_hooks
->type_decl (tdecl
, 0);
3433 /* Record one of the standard Java types.
3434 * Declare it as having the given NAME.
3435 * If SIZE > 0, it is the size of one of the integral types;
3436 * otherwise it is the negative of the size of one of the other types. */
3439 record_builtin_java_type (const char* name
, int size
)
3444 type
= build_nonstandard_integer_type (size
, 0);
3445 type
= build_distinct_type_copy (type
);
3447 else if (size
> -32)
3450 /* "__java_char" or ""__java_boolean". */
3451 type
= build_nonstandard_integer_type (-size
, 1);
3452 type
= build_distinct_type_copy (type
);
3453 /* Get the signed type cached and attached to the unsigned type,
3454 so it doesn't get garbage-collected at "random" times,
3455 causing potential codegen differences out of different UIDs
3456 and different alias set numbers. */
3457 stype
= build_nonstandard_integer_type (-size
, 0);
3458 stype
= build_distinct_type_copy (stype
);
3459 TREE_CHAIN (type
) = stype
;
3460 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3463 { /* "__java_float" or ""__java_double". */
3464 type
= make_node (REAL_TYPE
);
3465 TYPE_PRECISION (type
) = - size
;
3468 record_builtin_type (RID_MAX
, name
, type
);
3469 decl
= TYPE_NAME (type
);
3471 /* Suppress generate debug symbol entries for these types,
3472 since for normal C++ they are just clutter.
3473 However, push_lang_context undoes this if extern "Java" is seen. */
3474 DECL_IGNORED_P (decl
) = 1;
3476 TYPE_FOR_JAVA (type
) = 1;
3480 /* Push a type into the namespace so that the back ends ignore it. */
3483 record_unknown_type (tree type
, const char* name
)
3485 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3486 TYPE_DECL
, get_identifier (name
), type
));
3487 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3488 DECL_IGNORED_P (decl
) = 1;
3489 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3490 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3491 TYPE_ALIGN (type
) = 1;
3492 TYPE_USER_ALIGN (type
) = 0;
3493 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3496 /* A string for which we should create an IDENTIFIER_NODE at
3499 typedef struct predefined_identifier
3501 /* The name of the identifier. */
3502 const char *const name
;
3503 /* The place where the IDENTIFIER_NODE should be stored. */
3505 /* Nonzero if this is the name of a constructor or destructor. */
3506 const int ctor_or_dtor_p
;
3507 } predefined_identifier
;
3509 /* Create all the predefined identifiers. */
3512 initialize_predefined_identifiers (void)
3514 const predefined_identifier
*pid
;
3516 /* A table of identifiers to create at startup. */
3517 static const predefined_identifier predefined_identifiers
[] = {
3518 { "C++", &lang_name_cplusplus
, 0 },
3519 { "C", &lang_name_c
, 0 },
3520 { "Java", &lang_name_java
, 0 },
3521 /* Some of these names have a trailing space so that it is
3522 impossible for them to conflict with names written by users. */
3523 { "__ct ", &ctor_identifier
, 1 },
3524 { "__base_ctor ", &base_ctor_identifier
, 1 },
3525 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3526 { "__dt ", &dtor_identifier
, 1 },
3527 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3528 { "__base_dtor ", &base_dtor_identifier
, 1 },
3529 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3530 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3531 { "nelts", &nelts_identifier
, 0 },
3532 { THIS_NAME
, &this_identifier
, 0 },
3533 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3534 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3535 { "_vptr", &vptr_identifier
, 0 },
3536 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3537 { "::", &global_scope_name
, 0 },
3538 { "std", &std_identifier
, 0 },
3542 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3544 *pid
->node
= get_identifier (pid
->name
);
3545 if (pid
->ctor_or_dtor_p
)
3546 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3550 /* Create the predefined scalar types of C,
3551 and some nodes representing standard constants (0, 1, (void *)0).
3552 Initialize the global binding level.
3553 Make definitions for built-in primitive functions. */
3556 cxx_init_decl_processing (void)
3559 tree void_ftype_ptr
;
3561 /* Create all the identifiers we need. */
3562 initialize_predefined_identifiers ();
3564 /* Create the global variables. */
3565 push_to_top_level ();
3567 current_function_decl
= NULL_TREE
;
3568 current_binding_level
= NULL
;
3569 /* Enter the global namespace. */
3570 gcc_assert (global_namespace
== NULL_TREE
);
3571 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3573 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3574 TREE_PUBLIC (global_namespace
) = 1;
3575 begin_scope (sk_namespace
, global_namespace
);
3577 if (flag_visibility_ms_compat
)
3578 default_visibility
= VISIBILITY_HIDDEN
;
3581 current_lang_name
= lang_name_c
;
3583 /* Create the `std' namespace. */
3584 push_namespace (std_identifier
);
3585 std_node
= current_namespace
;
3588 c_common_nodes_and_builtins ();
3590 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3591 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3592 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3593 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3594 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3595 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3596 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3597 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3599 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3601 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3602 truthvalue_type_node
= boolean_type_node
;
3603 truthvalue_false_node
= boolean_false_node
;
3604 truthvalue_true_node
= boolean_true_node
;
3606 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3607 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3608 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3611 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3614 delta_type_node
= ptrdiff_type_node
;
3615 vtable_index_type
= ptrdiff_type_node
;
3617 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3618 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3619 void_ftype_ptr
= build_function_type_list (void_type_node
,
3620 ptr_type_node
, NULL_TREE
);
3622 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3624 /* C++ extensions */
3626 unknown_type_node
= make_node (LANG_TYPE
);
3627 record_unknown_type (unknown_type_node
, "unknown type");
3629 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3630 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3632 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3634 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3635 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3637 init_list_type_node
= make_node (LANG_TYPE
);
3638 record_unknown_type (init_list_type_node
, "init list");
3640 dependent_lambda_return_type_node
= make_node (LANG_TYPE
);
3641 record_unknown_type (dependent_lambda_return_type_node
,
3642 "undeduced lambda return type");
3645 /* Make sure we get a unique function type, so we can give
3646 its pointer type a name. (This wins for gdb.) */
3647 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3648 TREE_TYPE (vfunc_type
) = integer_type_node
;
3649 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3650 layout_type (vfunc_type
);
3652 vtable_entry_type
= build_pointer_type (vfunc_type
);
3654 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3657 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3658 layout_type (vtbl_type_node
);
3659 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3660 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3661 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3662 layout_type (vtbl_ptr_type_node
);
3663 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3665 push_namespace (get_identifier ("__cxxabiv1"));
3666 abi_node
= current_namespace
;
3669 global_type_node
= make_node (LANG_TYPE
);
3670 record_unknown_type (global_type_node
, "global type");
3673 current_lang_name
= lang_name_cplusplus
;
3676 tree newattrs
, extvisattr
;
3677 tree newtype
, deltype
;
3678 tree ptr_ftype_sizetype
;
3682 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3683 if (cxx_dialect
== cxx98
)
3686 tree bad_alloc_type_node
;
3687 tree bad_alloc_decl
;
3689 push_namespace (std_identifier
);
3690 bad_alloc_id
= get_identifier ("bad_alloc");
3691 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3692 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3694 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3695 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3699 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3702 new_eh_spec
= noexcept_false_spec
;
3704 /* Ensure attribs.c is initialized. */
3706 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3708 newattrs
= tree_cons (get_identifier ("alloc_size"),
3709 build_tree_list (NULL_TREE
, integer_one_node
),
3711 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3712 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3713 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3714 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3715 push_cp_library_fn (NEW_EXPR
, newtype
);
3716 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3717 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3718 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3720 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3721 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3722 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3723 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3724 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3725 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3726 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3727 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3731 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3733 /* Perform other language dependent initializations. */
3734 init_class_processing ();
3735 init_rtti_processing ();
3736 init_template_processing ();
3738 if (flag_exceptions
)
3739 init_exception_processing ();
3741 if (! supports_one_only ())
3744 make_fname_decl
= cp_make_fname_decl
;
3745 start_fname_decls ();
3747 /* Show we use EH for cleanups. */
3748 if (flag_exceptions
)
3749 using_eh_for_cleanups ();
3752 /* Generate an initializer for a function naming variable from
3753 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3754 filled in with the type of the init. */
3757 cp_fname_init (const char* name
, tree
*type_p
)
3759 tree domain
= NULL_TREE
;
3761 tree init
= NULL_TREE
;
3766 length
= strlen (name
);
3767 domain
= build_index_type (size_int (length
));
3768 init
= build_string (length
+ 1, name
);
3771 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3772 type
= build_cplus_array_type (type
, domain
);
3777 TREE_TYPE (init
) = type
;
3779 init
= error_mark_node
;
3784 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3785 the decl, LOC is the location to give the decl, NAME is the
3786 initialization string and TYPE_DEP indicates whether NAME depended
3787 on the type of the function. We make use of that to detect
3788 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3789 at the point of first use, so we mustn't push the decl now. */
3792 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3794 const char *const name
= (type_dep
&& processing_template_decl
3795 ? NULL
: fname_as_string (type_dep
));
3797 tree init
= cp_fname_init (name
, &type
);
3798 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3801 free (CONST_CAST (char *, name
));
3803 /* As we're using pushdecl_with_scope, we must set the context. */
3804 DECL_CONTEXT (decl
) = current_function_decl
;
3805 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3807 TREE_STATIC (decl
) = 1;
3808 TREE_READONLY (decl
) = 1;
3809 DECL_ARTIFICIAL (decl
) = 1;
3811 TREE_USED (decl
) = 1;
3813 if (current_function_decl
)
3815 cp_binding_level
*b
= current_binding_level
;
3816 if (b
->kind
== sk_function_parms
)
3817 return error_mark_node
;
3818 while (b
->level_chain
->kind
!= sk_function_parms
)
3820 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3821 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3822 LOOKUP_ONLYCONVERTING
);
3826 DECL_THIS_STATIC (decl
) = true;
3827 pushdecl_top_level_and_finish (decl
, init
);
3834 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3836 tree id
= DECL_NAME (decl
);
3837 const char *name
= IDENTIFIER_POINTER (id
);
3839 retrofit_lang_decl (decl
);
3841 DECL_ARTIFICIAL (decl
) = 1;
3842 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3843 SET_DECL_LANGUAGE (decl
, lang_c
);
3844 /* Runtime library routines are, by definition, available in an
3845 external shared object. */
3846 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3847 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3849 DECL_CONTEXT (decl
) = context
;
3852 pushdecl_top_level (decl
);
3856 /* A function in the user's namespace should have an explicit
3857 declaration before it is used. Mark the built-in function as
3858 anticipated but not actually declared. */
3859 if (name
[0] != '_' || name
[1] != '_')
3860 DECL_ANTICIPATED (decl
) = 1;
3861 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3863 size_t len
= strlen (name
);
3865 /* Treat __*_chk fortification functions as anticipated as well,
3866 unless they are __builtin_*. */
3867 if (len
> strlen ("___chk")
3868 && memcmp (name
+ len
- strlen ("_chk"),
3869 "_chk", strlen ("_chk") + 1) == 0)
3870 DECL_ANTICIPATED (decl
) = 1;
3877 cxx_builtin_function (tree decl
)
3879 tree id
= DECL_NAME (decl
);
3880 const char *name
= IDENTIFIER_POINTER (id
);
3881 /* All builtins that don't begin with an '_' should additionally
3882 go in the 'std' namespace. */
3885 tree decl2
= copy_node(decl
);
3886 push_namespace (std_identifier
);
3887 builtin_function_1 (decl2
, std_node
, false);
3891 return builtin_function_1 (decl
, NULL_TREE
, false);
3894 /* Like cxx_builtin_function, but guarantee the function is added to the global
3895 scope. This is to allow function specific options to add new machine
3896 dependent builtins when the target ISA changes via attribute((target(...)))
3897 which saves space on program startup if the program does not use non-generic
3901 cxx_builtin_function_ext_scope (tree decl
)
3904 tree id
= DECL_NAME (decl
);
3905 const char *name
= IDENTIFIER_POINTER (id
);
3906 /* All builtins that don't begin with an '_' should additionally
3907 go in the 'std' namespace. */
3910 tree decl2
= copy_node(decl
);
3911 push_namespace (std_identifier
);
3912 builtin_function_1 (decl2
, std_node
, true);
3916 return builtin_function_1 (decl
, NULL_TREE
, true);
3919 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3920 function. Not called directly. */
3923 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3925 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3926 DECL_EXTERNAL (fn
) = 1;
3927 TREE_PUBLIC (fn
) = 1;
3928 DECL_ARTIFICIAL (fn
) = 1;
3929 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3930 SET_DECL_LANGUAGE (fn
, lang_c
);
3931 /* Runtime library routines are, by definition, available in an
3932 external shared object. */
3933 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3934 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3938 /* Returns the _DECL for a library function with C linkage.
3939 We assume that such functions never throw; if this is incorrect,
3940 callers should unset TREE_NOTHROW. */
3943 build_library_fn (tree name
, tree type
)
3945 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3946 TREE_NOTHROW (fn
) = 1;
3950 /* Returns the _DECL for a library function with C++ linkage. */
3953 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3955 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3956 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3957 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3958 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3962 /* Like build_library_fn, but takes a C string instead of an
3966 build_library_fn_ptr (const char* name
, tree type
)
3968 return build_library_fn (get_identifier (name
), type
);
3971 /* Like build_cp_library_fn, but takes a C string instead of an
3975 build_cp_library_fn_ptr (const char* name
, tree type
)
3977 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3980 /* Like build_library_fn, but also pushes the function so that we will
3981 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3982 may throw exceptions listed in RAISES. */
3985 push_library_fn (tree name
, tree type
, tree raises
)
3990 type
= build_exception_variant (type
, raises
);
3992 fn
= build_library_fn (name
, type
);
3993 pushdecl_top_level (fn
);
3997 /* Like build_cp_library_fn, but also pushes the function so that it
3998 will be found by normal lookup. */
4001 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4003 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4008 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4012 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4016 push_void_library_fn (tree name
, tree parmtypes
)
4018 tree type
= build_function_type (void_type_node
, parmtypes
);
4019 return push_library_fn (name
, type
, NULL_TREE
);
4022 /* Like push_library_fn, but also note that this function throws
4023 and does not return. Used for __throw_foo and the like. */
4026 push_throw_library_fn (tree name
, tree type
)
4028 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4029 TREE_THIS_VOLATILE (fn
) = 1;
4030 TREE_NOTHROW (fn
) = 0;
4034 /* When we call finish_struct for an anonymous union, we create
4035 default copy constructors and such. But, an anonymous union
4036 shouldn't have such things; this function undoes the damage to the
4037 anonymous union type T.
4039 (The reason that we create the synthesized methods is that we don't
4040 distinguish `union { int i; }' from `typedef union { int i; } U'.
4041 The first is an anonymous union; the second is just an ordinary
4045 fixup_anonymous_aggr (tree t
)
4049 /* Wipe out memory of synthesized methods. */
4050 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4051 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4052 TYPE_HAS_COPY_CTOR (t
) = 0;
4053 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4054 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4055 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4057 /* Splice the implicitly generated functions out of the TYPE_METHODS
4059 q
= &TYPE_METHODS (t
);
4062 if (DECL_ARTIFICIAL (*q
))
4063 *q
= TREE_CHAIN (*q
);
4065 q
= &DECL_CHAIN (*q
);
4068 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4069 if (TYPE_METHODS (t
))
4071 tree decl
= TYPE_MAIN_DECL (t
);
4073 if (TREE_CODE (t
) != UNION_TYPE
)
4074 error_at (DECL_SOURCE_LOCATION (decl
),
4075 "an anonymous struct cannot have function members");
4077 error_at (DECL_SOURCE_LOCATION (decl
),
4078 "an anonymous union cannot have function members");
4081 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4082 assignment operators (because they cannot have these methods themselves).
4083 For anonymous unions this is already checked because they are not allowed
4084 in any union, otherwise we have to check it. */
4085 if (TREE_CODE (t
) != UNION_TYPE
)
4089 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4090 if (TREE_CODE (field
) == FIELD_DECL
)
4092 type
= TREE_TYPE (field
);
4093 if (CLASS_TYPE_P (type
))
4095 if (TYPE_NEEDS_CONSTRUCTING (type
))
4096 error ("member %q+#D with constructor not allowed "
4097 "in anonymous aggregate", field
);
4098 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4099 error ("member %q+#D with destructor not allowed "
4100 "in anonymous aggregate", field
);
4101 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4102 error ("member %q+#D with copy assignment operator "
4103 "not allowed in anonymous aggregate", field
);
4109 /* Make sure that a declaration with no declarator is well-formed, i.e.
4110 just declares a tagged type or anonymous union.
4112 Returns the type declared; or NULL_TREE if none. */
4115 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
4117 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
4118 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
4119 /* If a class, struct, or enum type is declared by the DECLSPECS
4120 (i.e, if a class-specifier, enum-specifier, or non-typename
4121 elaborated-type-specifier appears in the DECLSPECS),
4122 DECLARED_TYPE is set to the corresponding type. */
4123 tree declared_type
= NULL_TREE
;
4124 bool error_p
= false;
4126 if (declspecs
->multiple_types_p
)
4127 error ("multiple types in one declaration");
4128 else if (declspecs
->redefined_builtin_type
)
4130 if (!in_system_header
)
4131 permerror (input_location
, "redeclaration of C++ built-in type %qT",
4132 declspecs
->redefined_builtin_type
);
4137 && TYPE_P (declspecs
->type
)
4138 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4139 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4140 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4141 declared_type
= declspecs
->type
;
4142 else if (declspecs
->type
== error_mark_node
)
4144 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4145 permerror (input_location
, "declaration does not declare anything");
4146 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4148 error ("%<auto%> can only be specified for variables "
4149 "or function declarations");
4150 return error_mark_node
;
4152 /* Check for an anonymous union. */
4153 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4154 && TYPE_ANONYMOUS_P (declared_type
))
4156 /* 7/3 In a simple-declaration, the optional init-declarator-list
4157 can be omitted only when declaring a class (clause 9) or
4158 enumeration (7.2), that is, when the decl-specifier-seq contains
4159 either a class-specifier, an elaborated-type-specifier with
4160 a class-key (9.1), or an enum-specifier. In these cases and
4161 whenever a class-specifier or enum-specifier is present in the
4162 decl-specifier-seq, the identifiers in these specifiers are among
4163 the names being declared by the declaration (as class-name,
4164 enum-names, or enumerators, depending on the syntax). In such
4165 cases, and except for the declaration of an unnamed bit-field (9.6),
4166 the decl-specifier-seq shall introduce one or more names into the
4167 program, or shall redeclare a name introduced by a previous
4168 declaration. [Example:
4169 enum { }; // ill-formed
4170 typedef class { }; // ill-formed
4174 error ("missing type-name in typedef-declaration");
4177 /* Anonymous unions are objects, so they can have specifiers. */;
4178 SET_ANON_AGGR_TYPE_P (declared_type
);
4180 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4181 pedwarn (input_location
, OPT_pedantic
, "ISO C++ prohibits anonymous structs");
4186 if (declspecs
->specs
[(int)ds_inline
]
4187 || declspecs
->specs
[(int)ds_virtual
])
4188 error ("%qs can only be specified for functions",
4189 declspecs
->specs
[(int)ds_inline
]
4190 ? "inline" : "virtual");
4192 && (!current_class_type
4193 || current_scope () != current_class_type
))
4194 error ("%<friend%> can only be specified inside a class");
4195 else if (declspecs
->specs
[(int)ds_explicit
])
4196 error ("%<explicit%> can only be specified for constructors");
4197 else if (declspecs
->storage_class
)
4198 error ("a storage class can only be specified for objects "
4200 else if (declspecs
->specs
[(int)ds_const
]
4201 || declspecs
->specs
[(int)ds_volatile
]
4202 || declspecs
->specs
[(int)ds_restrict
]
4203 || declspecs
->specs
[(int)ds_thread
])
4204 error ("qualifiers can only be specified for objects "
4206 else if (saw_typedef
)
4207 warning (0, "%<typedef%> was ignored in this declaration");
4208 else if (declspecs
->specs
[(int) ds_constexpr
])
4209 error ("%<constexpr%> cannot be used for type declarations");
4212 return declared_type
;
4215 /* Called when a declaration is seen that contains no names to declare.
4216 If its type is a reference to a structure, union or enum inherited
4217 from a containing scope, shadow that tag name for the current scope
4218 with a forward reference.
4219 If its type defines a new named structure or union
4220 or defines an enum, it is valid but we need not do anything here.
4221 Otherwise, it is an error.
4223 C++: may have to grok the declspecs to learn about static,
4224 complain for anonymous unions.
4226 Returns the TYPE declared -- or NULL_TREE if none. */
4229 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4231 tree t
= check_tag_decl (declspecs
);
4236 if (declspecs
->attributes
)
4238 warning (0, "attribute ignored in declaration of %q+#T", t
);
4239 warning (0, "attribute for %q+#T must follow the %qs keyword",
4240 t
, class_key_or_enum_as_string (t
));
4244 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4247 /* This is where the variables in an anonymous union are
4248 declared. An anonymous union declaration looks like:
4250 because there is no declarator after the union, the parser
4251 sends that declaration here. */
4252 if (ANON_AGGR_TYPE_P (t
))
4254 fixup_anonymous_aggr (t
);
4256 if (TYPE_FIELDS (t
))
4258 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4259 declspecs
, NORMAL
, 0, NULL
);
4260 finish_anon_union (decl
);
4267 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4270 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4271 const cp_declarator
*declarator
,
4272 bool is_template_arg
)
4276 enum decl_context context
4277 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4278 attrs
= type_specifiers
->attributes
;
4279 type_specifiers
->attributes
= NULL_TREE
;
4280 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4281 if (attrs
&& type
!= error_mark_node
)
4283 if (CLASS_TYPE_P (type
))
4284 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4285 "outside of definition", type
);
4286 else if (MAYBE_CLASS_TYPE_P (type
))
4287 /* A template type parameter or other dependent type. */
4288 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4289 "type %qT without an associated declaration", type
);
4291 cplus_decl_attributes (&type
, attrs
, 0);
4296 /* Process a DECLARATOR for a function-scope variable declaration,
4297 namespace-scope variable declaration, or function declaration.
4298 (Function definitions go through start_function; class member
4299 declarations appearing in the body of the class go through
4300 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4301 If an error occurs, the error_mark_node is returned instead.
4303 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4304 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4305 for an explicitly defaulted function, or SD_DELETED for an explicitly
4306 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4307 implicitly initialized via a default constructor. ATTRIBUTES and
4308 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4310 The scope represented by the context of the returned DECL is pushed
4311 (if it is not the global namespace) and is assigned to
4312 *PUSHED_SCOPE_P. The caller is then responsible for calling
4313 pop_scope on *PUSHED_SCOPE_P if it is set. */
4316 start_decl (const cp_declarator
*declarator
,
4317 cp_decl_specifier_seq
*declspecs
,
4320 tree prefix_attributes
,
4321 tree
*pushed_scope_p
)
4329 *pushed_scope_p
= NULL_TREE
;
4331 /* An object declared as __attribute__((deprecated)) suppresses
4332 warnings of uses of other deprecated items. */
4333 if (lookup_attribute ("deprecated", attributes
))
4334 deprecated_state
= DEPRECATED_SUPPRESS
;
4336 attributes
= chainon (attributes
, prefix_attributes
);
4338 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4341 deprecated_state
= DEPRECATED_NORMAL
;
4343 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4344 || decl
== error_mark_node
)
4345 return error_mark_node
;
4347 context
= CP_DECL_CONTEXT (decl
);
4348 if (context
!= global_namespace
)
4349 *pushed_scope_p
= push_scope (context
);
4352 /* Is it valid for this decl to have an initializer at all?
4353 If not, set INITIALIZED to zero, which will indirectly
4354 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4355 switch (TREE_CODE (decl
))
4358 error ("typedef %qD is initialized (use decltype instead)", decl
);
4359 return error_mark_node
;
4362 if (initialized
== SD_DELETED
)
4363 /* We'll handle the rest of the semantics later, but we need to
4364 set this now so it's visible to duplicate_decls. */
4365 DECL_DELETED_FN (decl
) = 1;
4374 if (! toplevel_bindings_p ()
4375 && DECL_EXTERNAL (decl
))
4376 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4378 DECL_EXTERNAL (decl
) = 0;
4379 if (toplevel_bindings_p ())
4380 TREE_STATIC (decl
) = 1;
4382 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4384 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4385 record_key_method_defined (decl
);
4387 /* If this is a typedef that names the class for linkage purposes
4388 (7.1.3p8), apply any attributes directly to the type. */
4389 if (TREE_CODE (decl
) == TYPE_DECL
4390 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4391 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4392 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4396 /* Set attributes here so if duplicate decl, will have proper attributes. */
4397 cplus_decl_attributes (&decl
, attributes
, flags
);
4399 /* Dllimported symbols cannot be defined. Static data members (which
4400 can be initialized in-class and dllimported) go through grokfield,
4401 not here, so we don't need to exclude those decls when checking for
4403 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4405 error ("definition of %q#D is marked %<dllimport%>", decl
);
4406 DECL_DLLIMPORT_P (decl
) = 0;
4409 /* If #pragma weak was used, mark the decl weak now. */
4410 maybe_apply_pragma_weak (decl
);
4412 if (TREE_CODE (decl
) == FUNCTION_DECL
4413 && DECL_DECLARED_INLINE_P (decl
)
4414 && DECL_UNINLINABLE (decl
)
4415 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4416 warning (0, "inline function %q+D given attribute noinline", decl
);
4418 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4420 if (TREE_CODE (decl
) == VAR_DECL
)
4422 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4423 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4424 error ("%q#D is not a static member of %q#T", decl
, context
);
4427 if (DECL_CONTEXT (field
) != context
)
4429 if (!same_type_p (DECL_CONTEXT (field
), context
))
4430 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4431 "to be defined as %<%T::%D%>",
4432 DECL_CONTEXT (field
), DECL_NAME (decl
),
4433 context
, DECL_NAME (decl
));
4434 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4436 if (processing_specialization
4437 && template_class_depth (context
) == 0
4438 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4439 error ("template header not allowed in member definition "
4440 "of explicitly specialized class");
4441 /* Static data member are tricky; an in-class initialization
4442 still doesn't provide a definition, so the in-class
4443 declaration will have DECL_EXTERNAL set, but will have an
4444 initialization. Thus, duplicate_decls won't warn
4445 about this situation, and so we check here. */
4446 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4447 error ("duplicate initialization of %qD", decl
);
4448 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4450 if (declspecs
->specs
[(int) ds_constexpr
]
4451 && !DECL_DECLARED_CONSTEXPR_P (field
))
4452 error ("%qD declared %<constexpr%> outside its class", field
);
4457 tree field
= check_classfn (context
, decl
,
4458 (processing_template_decl
4459 > template_class_depth (context
))
4460 ? current_template_parms
4462 if (field
&& field
!= error_mark_node
4463 && duplicate_decls (decl
, field
,
4464 /*newdecl_is_friend=*/false))
4468 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4469 DECL_IN_AGGR_P (decl
) = 0;
4470 /* Do not mark DECL as an explicit specialization if it was not
4471 already marked as an instantiation; a declaration should
4472 never be marked as a specialization unless we know what
4473 template is being specialized. */
4474 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4476 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4478 /* [temp.expl.spec] An explicit specialization of a static data
4479 member of a template is a definition if the declaration
4480 includes an initializer; otherwise, it is a declaration.
4482 We check for processing_specialization so this only applies
4483 to the new specialization syntax. */
4484 if (!initialized
&& processing_specialization
)
4485 DECL_EXTERNAL (decl
) = 1;
4488 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4489 /* Aliases are definitions. */
4491 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4495 was_public
= TREE_PUBLIC (decl
);
4497 /* Enter this declaration into the symbol table. */
4498 decl
= maybe_push_decl (decl
);
4500 if (processing_template_decl
)
4501 decl
= push_template_decl (decl
);
4502 if (decl
== error_mark_node
)
4503 return error_mark_node
;
4505 /* Tell the back end to use or not use .common as appropriate. If we say
4506 -fconserve-space, we want this to save .data space, at the expense of
4507 wrong semantics. If we say -fno-conserve-space, we want this to
4508 produce errors about redefs; to do this we force variables into the
4510 if (flag_conserve_space
4511 && TREE_CODE (decl
) == VAR_DECL
4512 && TREE_PUBLIC (decl
)
4513 && !DECL_THREAD_LOCAL_P (decl
)
4514 && !have_global_bss_p ())
4515 DECL_COMMON (decl
) = 1;
4517 if (TREE_CODE (decl
) == VAR_DECL
4518 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4519 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4521 /* This is a const variable with implicit 'static'. Set
4522 DECL_THIS_STATIC so we can tell it from variables that are
4523 !TREE_PUBLIC because of the anonymous namespace. */
4524 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4525 DECL_THIS_STATIC (decl
) = 1;
4528 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4529 start_decl_1 (decl
, initialized
);
4534 /* Process the declaration of a variable DECL. INITIALIZED is true
4535 iff DECL is explicitly initialized. (INITIALIZED is false if the
4536 variable is initialized via an implicitly-called constructor.)
4537 This function must be called for ordinary variables (including, for
4538 example, implicit instantiations of templates), but must not be
4539 called for template declarations. */
4542 start_decl_1 (tree decl
, bool initialized
)
4546 bool aggregate_definition_p
;
4548 gcc_assert (!processing_template_decl
);
4550 if (error_operand_p (decl
))
4553 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4555 type
= TREE_TYPE (decl
);
4556 complete_p
= COMPLETE_TYPE_P (type
);
4557 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4559 /* If an explicit initializer is present, or if this is a definition
4560 of an aggregate, then we need a complete type at this point.
4561 (Scalars are always complete types, so there is nothing to
4562 check.) This code just sets COMPLETE_P; errors (if necessary)
4563 are issued below. */
4564 if ((initialized
|| aggregate_definition_p
)
4566 && COMPLETE_TYPE_P (complete_type (type
)))
4569 /* We will not yet have set TREE_READONLY on DECL if the type
4570 was "const", but incomplete, before this point. But, now, we
4571 have a complete type, so we can try again. */
4572 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4576 /* Is it valid for this decl to have an initializer at all? */
4578 /* Don't allow initializations for incomplete types except for
4579 arrays which might be completed by the initialization. */
4581 ; /* A complete type is ok. */
4582 else if (type_uses_auto (type
))
4583 ; /* An auto type is ok. */
4584 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4586 error ("variable %q#D has initializer but incomplete type", decl
);
4587 type
= TREE_TYPE (decl
) = error_mark_node
;
4589 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4591 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4592 error ("elements of array %q#D have incomplete type", decl
);
4593 /* else we already gave an error in start_decl. */
4596 else if (aggregate_definition_p
&& !complete_p
)
4598 if (type_uses_auto (type
))
4599 error ("declaration of %q#D has no initializer", decl
);
4601 error ("aggregate %q#D has incomplete type and cannot be defined",
4603 /* Change the type so that assemble_variable will give
4604 DECL an rtl we can live with: (mem (const_int 0)). */
4605 type
= TREE_TYPE (decl
) = error_mark_node
;
4608 /* Create a new scope to hold this declaration if necessary.
4609 Whether or not a new scope is necessary cannot be determined
4610 until after the type has been completed; if the type is a
4611 specialization of a class template it is not until after
4612 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4613 will be set correctly. */
4614 maybe_push_cleanup_level (type
);
4617 /* Handle initialization of references. DECL, TYPE, and INIT have the
4618 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4619 but will be set to a new CLEANUP_STMT if a temporary is created
4620 that must be destroyed subsequently.
4622 Returns an initializer expression to use to initialize DECL, or
4623 NULL if the initialization can be performed statically.
4625 Quotes on semantics can be found in ARM 8.4.3. */
4628 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4630 if (init
== NULL_TREE
)
4632 if ((DECL_LANG_SPECIFIC (decl
) == 0
4633 || DECL_IN_AGGR_P (decl
) == 0)
4634 && ! DECL_THIS_EXTERN (decl
))
4635 error ("%qD declared as reference but not initialized", decl
);
4639 if (TREE_CODE (init
) == TREE_LIST
)
4640 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4641 tf_warning_or_error
);
4643 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4644 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4645 /* Note: default conversion is only called in very special cases. */
4646 init
= decay_conversion (init
);
4648 /* Convert INIT to the reference type TYPE. This may involve the
4649 creation of a temporary, whose lifetime must be the same as that
4650 of the reference. If so, a DECL_EXPR for the temporary will be
4651 added just after the DECL_EXPR for DECL. That's why we don't set
4652 DECL_INITIAL for local references (instead assigning to them
4653 explicitly); we need to allow the temporary to be initialized
4655 return initialize_reference (type
, init
, flags
,
4656 tf_warning_or_error
);
4659 /* Designated initializers in arrays are not supported in GNU C++.
4660 The parser cannot detect this error since it does not know whether
4661 a given brace-enclosed initializer is for a class type or for an
4662 array. This function checks that CE does not use a designated
4663 initializer. If it does, an error is issued. Returns true if CE
4664 is valid, i.e., does not have a designated initializer. */
4667 check_array_designated_initializer (const constructor_elt
*ce
,
4668 unsigned HOST_WIDE_INT index
)
4670 /* Designated initializers for array elements are not supported. */
4673 /* The parser only allows identifiers as designated
4675 if (ce
->index
== error_mark_node
)
4676 error ("name used in a GNU-style designated "
4677 "initializer for an array");
4678 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4680 /* A C99 designator is OK if it matches the current index. */
4681 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4684 sorry ("non-trivial designated initializers not supported");
4688 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4689 error ("name %qD used in a GNU-style designated "
4690 "initializer for an array", ce
->index
);
4698 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4699 array until we finish parsing the initializer. If that's the
4700 situation we're in, update DECL accordingly. */
4703 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4705 tree type
= TREE_TYPE (decl
);
4707 if (TREE_CODE (type
) == ARRAY_TYPE
4708 && TYPE_DOMAIN (type
) == NULL_TREE
4709 && TREE_CODE (decl
) != TYPE_DECL
)
4711 /* do_default is really a C-ism to deal with tentative definitions.
4712 But let's leave it here to ease the eventual merge. */
4713 int do_default
= !DECL_EXTERNAL (decl
);
4714 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4717 /* Check that there are no designated initializers in INIT, as
4718 those are not supported in GNU C++, and as the middle-end
4719 will crash if presented with a non-numeric designated
4721 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4723 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4724 constructor_elt
*ce
;
4726 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4727 if (!check_array_designated_initializer (ce
, i
))
4733 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4737 error ("initializer fails to determine size of %qD", decl
);
4738 TREE_TYPE (decl
) = error_mark_node
;
4740 else if (failure
== 2)
4744 error ("array size missing in %qD", decl
);
4745 TREE_TYPE (decl
) = error_mark_node
;
4747 /* If a `static' var's size isn't known, make it extern as
4748 well as static, so it does not get allocated. If it's not
4749 `static', then don't mark it extern; finish_incomplete_decl
4750 will give it a default size and it will get allocated. */
4751 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4752 DECL_EXTERNAL (decl
) = 1;
4754 else if (failure
== 3)
4756 error ("zero-size array %qD", decl
);
4757 TREE_TYPE (decl
) = error_mark_node
;
4761 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4763 relayout_decl (decl
);
4767 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4768 any appropriate error messages regarding the layout. */
4771 layout_var_decl (tree decl
)
4775 type
= TREE_TYPE (decl
);
4776 if (type
== error_mark_node
)
4779 /* If we haven't already layed out this declaration, do so now.
4780 Note that we must not call complete type for an external object
4781 because it's type might involve templates that we are not
4782 supposed to instantiate yet. (And it's perfectly valid to say
4783 `extern X x' for some incomplete type `X'.) */
4784 if (!DECL_EXTERNAL (decl
))
4785 complete_type (type
);
4786 if (!DECL_SIZE (decl
)
4787 && TREE_TYPE (decl
) != error_mark_node
4788 && (COMPLETE_TYPE_P (type
)
4789 || (TREE_CODE (type
) == ARRAY_TYPE
4790 && !TYPE_DOMAIN (type
)
4791 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4792 layout_decl (decl
, 0);
4794 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4796 /* An automatic variable with an incomplete type: that is an error.
4797 Don't talk about array types here, since we took care of that
4798 message in grokdeclarator. */
4799 error ("storage size of %qD isn%'t known", decl
);
4800 TREE_TYPE (decl
) = error_mark_node
;
4803 /* Keep this code around in case we later want to control debug info
4804 based on whether a type is "used". (jason 1999-11-11) */
4806 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4807 /* Let debugger know it should output info for this type. */
4808 note_debug_info_needed (ttype
);
4810 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4811 note_debug_info_needed (DECL_CONTEXT (decl
));
4814 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4815 && DECL_SIZE (decl
) != NULL_TREE
4816 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4818 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4819 constant_expression_warning (DECL_SIZE (decl
));
4822 error ("storage size of %qD isn%'t constant", decl
);
4823 TREE_TYPE (decl
) = error_mark_node
;
4828 /* If a local static variable is declared in an inline function, or if
4829 we have a weak definition, we must endeavor to create only one
4830 instance of the variable at link-time. */
4833 maybe_commonize_var (tree decl
)
4835 /* Static data in a function with comdat linkage also has comdat
4837 if (TREE_STATIC (decl
)
4838 /* Don't mess with __FUNCTION__. */
4839 && ! DECL_ARTIFICIAL (decl
)
4840 && DECL_FUNCTION_SCOPE_P (decl
)
4841 && vague_linkage_p (DECL_CONTEXT (decl
)))
4845 /* With weak symbols, we simply make the variable COMDAT;
4846 that will cause copies in multiple translations units to
4848 comdat_linkage (decl
);
4852 if (DECL_INITIAL (decl
) == NULL_TREE
4853 || DECL_INITIAL (decl
) == error_mark_node
)
4855 /* Without weak symbols, we can use COMMON to merge
4856 uninitialized variables. */
4857 TREE_PUBLIC (decl
) = 1;
4858 DECL_COMMON (decl
) = 1;
4862 /* While for initialized variables, we must use internal
4863 linkage -- which means that multiple copies will not
4865 TREE_PUBLIC (decl
) = 0;
4866 DECL_COMMON (decl
) = 0;
4867 warning_at (input_location
, 0,
4868 "sorry: semantics of inline function static "
4869 "data %q+#D are wrong (you%'ll wind up "
4870 "with multiple copies)", decl
);
4871 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4872 " you can work around this by removing "
4877 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4878 /* Set it up again; we might have set DECL_INITIAL since the last
4880 comdat_linkage (decl
);
4883 /* Issue an error message if DECL is an uninitialized const variable. */
4886 check_for_uninitialized_const_var (tree decl
)
4888 tree type
= strip_array_types (TREE_TYPE (decl
));
4890 /* ``Unless explicitly declared extern, a const object does not have
4891 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4893 if (TREE_CODE (decl
) == VAR_DECL
4894 && TREE_CODE (type
) != REFERENCE_TYPE
4895 && CP_TYPE_CONST_P (type
)
4896 && !DECL_INITIAL (decl
))
4898 tree field
= default_init_uninitialized_part (type
);
4902 permerror (DECL_SOURCE_LOCATION (decl
),
4903 "uninitialized const %qD", decl
);
4905 if (CLASS_TYPE_P (type
))
4907 tree defaulted_ctor
;
4909 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4910 "%q#T has no user-provided default constructor", type
);
4911 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4913 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4914 "constructor is not user-provided because it is "
4915 "explicitly defaulted in the class body");
4916 inform (0, "and the implicitly-defined constructor does not "
4917 "initialize %q+#D", field
);
4922 /* Structure holding the current initializer being processed by reshape_init.
4923 CUR is a pointer to the current element being processed, END is a pointer
4924 after the last element present in the initializer. */
4925 typedef struct reshape_iterator_t
4927 constructor_elt
*cur
;
4928 constructor_elt
*end
;
4931 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
4933 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4934 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4935 initialized. If there are no more such fields, the return value
4939 next_initializable_field (tree field
)
4942 && (TREE_CODE (field
) != FIELD_DECL
4943 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4944 || DECL_ARTIFICIAL (field
)))
4945 field
= DECL_CHAIN (field
);
4950 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4951 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4952 INTEGER_CST representing the size of the array minus one (the maximum index),
4953 or NULL_TREE if the array was declared without specifying the size. D is
4954 the iterator within the constructor. */
4957 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
4958 tsubst_flags_t complain
)
4961 bool sized_array_p
= (max_index
!= NULL_TREE
);
4962 unsigned HOST_WIDE_INT max_index_cst
= 0;
4963 unsigned HOST_WIDE_INT index
;
4965 /* The initializer for an array is always a CONSTRUCTOR. */
4966 new_init
= build_constructor (init_list_type_node
, NULL
);
4970 /* Minus 1 is used for zero sized arrays. */
4971 if (integer_all_onesp (max_index
))
4974 if (host_integerp (max_index
, 1))
4975 max_index_cst
= tree_low_cst (max_index
, 1);
4976 /* sizetype is sign extended, not zero extended. */
4978 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4982 /* Loop until there are no more initializers. */
4984 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4989 check_array_designated_initializer (d
->cur
, index
);
4990 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
4992 if (elt_init
== error_mark_node
)
4993 return error_mark_node
;
4994 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
4995 size_int (index
), elt_init
);
4996 if (!TREE_CONSTANT (elt_init
))
4997 TREE_CONSTANT (new_init
) = false;
5003 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5004 Parameters are the same of reshape_init_r. */
5007 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5009 tree max_index
= NULL_TREE
;
5011 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5013 if (TYPE_DOMAIN (type
))
5014 max_index
= array_type_nelts (type
);
5016 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5019 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5020 Parameters are the same of reshape_init_r. */
5023 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5025 tree max_index
= NULL_TREE
;
5027 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5029 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5031 tree value
= d
->cur
->value
;
5032 if (!same_type_p (TREE_TYPE (value
), type
))
5034 if (complain
& tf_error
)
5035 error ("invalid type %qT as initializer for a vector of type %qT",
5036 TREE_TYPE (d
->cur
->value
), type
);
5037 value
= error_mark_node
;
5043 /* For a vector, we initialize it as an array of the appropriate size. */
5044 if (TREE_CODE (type
) == VECTOR_TYPE
)
5045 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5047 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5050 /* Subroutine of reshape_init_r, processes the initializers for classes
5051 or union. Parameters are the same of reshape_init_r. */
5054 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5055 tsubst_flags_t complain
)
5060 gcc_assert (CLASS_TYPE_P (type
));
5062 /* The initializer for a class is always a CONSTRUCTOR. */
5063 new_init
= build_constructor (init_list_type_node
, NULL
);
5064 field
= next_initializable_field (TYPE_FIELDS (type
));
5070 An initializer for an aggregate member that is an
5071 empty class shall have the form of an empty
5072 initializer-list {}. */
5073 if (!first_initializer_p
)
5075 if (complain
& tf_error
)
5076 error ("initializer for %qT must be brace-enclosed", type
);
5077 return error_mark_node
;
5082 /* Loop through the initializable fields, gathering initializers. */
5083 while (d
->cur
!= d
->end
)
5087 /* Handle designated initializers, as an extension. */
5090 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5092 if (complain
& tf_error
)
5093 error ("%<[%E] =%> used in a GNU-style designated initializer"
5094 " for class %qT", d
->cur
->index
, type
);
5095 return error_mark_node
;
5098 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5100 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5102 if (complain
& tf_error
)
5103 error ("%qT has no non-static data member named %qD", type
,
5105 return error_mark_node
;
5109 /* If we processed all the member of the class, we are done. */
5113 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5114 /*first_initializer_p=*/false, complain
);
5115 if (field_init
== error_mark_node
)
5116 return error_mark_node
;
5118 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5122 When a union is initialized with a brace-enclosed
5123 initializer, the braces shall only contain an
5124 initializer for the first member of the union. */
5125 if (TREE_CODE (type
) == UNION_TYPE
)
5128 field
= next_initializable_field (DECL_CHAIN (field
));
5134 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5135 designators are not valid; either complain or return true to indicate
5136 that reshape_init_r should return error_mark_node. */
5139 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5143 if (complain
& tf_error
)
5144 error ("C99 designator %qE outside aggregate initializer",
5152 /* Subroutine of reshape_init, which processes a single initializer (part of
5153 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5154 iterator within the CONSTRUCTOR which points to the initializer to process.
5155 FIRST_INITIALIZER_P is true if this is the first initializer of the
5156 outermost CONSTRUCTOR node. */
5159 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5160 tsubst_flags_t complain
)
5162 tree init
= d
->cur
->value
;
5164 if (error_operand_p (init
))
5165 return error_mark_node
;
5167 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5168 && has_designator_problem (d
, complain
))
5169 return error_mark_node
;
5171 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5173 /* A complex type can be initialized from one or two initializers,
5174 but braces are not elided. */
5176 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5178 if (CONSTRUCTOR_NELTS (init
) > 2)
5180 if (complain
& tf_error
)
5181 error ("too many initializers for %qT", type
);
5183 return error_mark_node
;
5186 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5188 VEC(constructor_elt
, gc
) *v
= 0;
5189 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5190 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5191 if (has_designator_problem (d
, complain
))
5192 return error_mark_node
;
5194 init
= build_constructor (init_list_type_node
, v
);
5199 /* A non-aggregate type is always initialized with a single
5201 if (!CP_AGGREGATE_TYPE_P (type
))
5203 /* It is invalid to initialize a non-aggregate type with a
5204 brace-enclosed initializer before C++0x.
5205 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5206 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5207 a CONSTRUCTOR (with a record type). */
5208 if (TREE_CODE (init
) == CONSTRUCTOR
5209 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5211 if (SCALAR_TYPE_P (type
))
5213 if (complain
& tf_error
)
5214 error ("braces around scalar initializer for type %qT", type
);
5215 init
= error_mark_node
;
5218 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5227 All implicit type conversions (clause _conv_) are considered when
5228 initializing the aggregate member with an initializer from an
5229 initializer-list. If the initializer can initialize a member,
5230 the member is initialized. Otherwise, if the member is itself a
5231 non-empty subaggregate, brace elision is assumed and the
5232 initializer is considered for the initialization of the first
5233 member of the subaggregate. */
5234 if (TREE_CODE (init
) != CONSTRUCTOR
5235 /* But don't try this for the first initializer, since that would be
5236 looking through the outermost braces; A a2 = { a1 }; is not a
5237 valid aggregate initialization. */
5238 && !first_initializer_p
5239 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5240 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5246 /* [dcl.init.string]
5248 A char array (whether plain char, signed char, or unsigned char)
5249 can be initialized by a string-literal (optionally enclosed in
5250 braces); a wchar_t array can be initialized by a wide
5251 string-literal (optionally enclosed in braces). */
5252 if (TREE_CODE (type
) == ARRAY_TYPE
5253 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5255 tree str_init
= init
;
5257 /* Strip one level of braces if and only if they enclose a single
5258 element (as allowed by [dcl.init.string]). */
5259 if (!first_initializer_p
5260 && TREE_CODE (str_init
) == CONSTRUCTOR
5261 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5263 str_init
= VEC_index (constructor_elt
,
5264 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5267 /* If it's a string literal, then it's the initializer for the array
5268 as a whole. Otherwise, continue with normal initialization for
5269 array types (one value per array element). */
5270 if (TREE_CODE (str_init
) == STRING_CST
)
5272 if (has_designator_problem (d
, complain
))
5273 return error_mark_node
;
5279 /* The following cases are about aggregates. If we are not within a full
5280 initializer already, and there is not a CONSTRUCTOR, it means that there
5281 is a missing set of braces (that is, we are processing the case for
5282 which reshape_init exists). */
5283 if (!first_initializer_p
)
5285 if (TREE_CODE (init
) == CONSTRUCTOR
)
5287 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5288 /* There is no need to reshape pointer-to-member function
5289 initializers, as they are always constructed correctly
5290 by the front end. */
5292 else if (COMPOUND_LITERAL_P (init
))
5293 /* For a nested compound literal, there is no need to reshape since
5294 brace elision is not allowed. Even if we decided to allow it,
5295 we should add a call to reshape_init in finish_compound_literal,
5296 before calling digest_init, so changing this code would still
5297 not be necessary. */
5298 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5302 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5303 return reshape_init (type
, init
, complain
);
5307 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5311 /* Dispatch to specialized routines. */
5312 if (CLASS_TYPE_P (type
))
5313 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5314 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5315 return reshape_init_array (type
, d
, complain
);
5316 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5317 return reshape_init_vector (type
, d
, complain
);
5322 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5323 brace-enclosed aggregate initializer.
5325 INIT is the CONSTRUCTOR containing the list of initializers describing
5326 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5327 It may not presently match the shape of the TYPE; for example:
5329 struct S { int a; int b; };
5330 struct S a[] = { 1, 2, 3, 4 };
5332 Here INIT will hold a VEC of four elements, rather than a
5333 VEC of two elements, each itself a VEC of two elements. This
5334 routine transforms INIT from the former form into the latter. The
5335 revised CONSTRUCTOR node is returned. */
5338 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5340 VEC(constructor_elt
, gc
) *v
;
5344 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5346 v
= CONSTRUCTOR_ELTS (init
);
5348 /* An empty constructor does not need reshaping, and it is always a valid
5350 if (VEC_empty (constructor_elt
, v
))
5353 /* Recurse on this CONSTRUCTOR. */
5354 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5355 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5357 new_init
= reshape_init_r (type
, &d
, true, complain
);
5358 if (new_init
== error_mark_node
)
5359 return error_mark_node
;
5361 /* Make sure all the element of the constructor were used. Otherwise,
5362 issue an error about exceeding initializers. */
5365 if (complain
& tf_error
)
5366 error ("too many initializers for %qT", type
);
5368 return error_mark_node
;
5374 /* Verify array initializer. Returns true if errors have been reported. */
5377 check_array_initializer (tree decl
, tree type
, tree init
)
5379 tree element_type
= TREE_TYPE (type
);
5381 /* The array type itself need not be complete, because the
5382 initializer may tell us how many elements are in the array.
5383 But, the elements of the array must be complete. */
5384 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5387 error ("elements of array %q#D have incomplete type", decl
);
5389 error ("elements of array %q#T have incomplete type", type
);
5392 /* It is not valid to initialize a VLA. */
5394 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5395 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5398 error ("variable-sized object %qD may not be initialized", decl
);
5400 error ("variable-sized compound literal");
5406 /* Subroutine of check_initializer; args are passed down from that function.
5407 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5410 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5413 gcc_assert (stmts_are_full_exprs_p ());
5414 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5417 /* Verify INIT (the initializer for DECL), and record the
5418 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5419 grok_reference_init.
5421 If the return value is non-NULL, it is an expression that must be
5422 evaluated dynamically to initialize DECL. */
5425 check_initializer (tree decl
, tree init
, int flags
, VEC(tree
,gc
) **cleanups
)
5427 tree type
= TREE_TYPE (decl
);
5428 tree init_code
= NULL
;
5429 tree extra_init
= NULL_TREE
;
5432 /* Things that are going to be initialized need to have complete
5434 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5436 if (DECL_HAS_VALUE_EXPR_P (decl
))
5438 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5439 it doesn't have storage to be initialized. */
5440 gcc_assert (init
== NULL_TREE
);
5444 if (type
== error_mark_node
)
5445 /* We will have already complained. */
5448 if (TREE_CODE (type
) == ARRAY_TYPE
)
5450 if (check_array_initializer (decl
, type
, init
))
5453 else if (!COMPLETE_TYPE_P (type
))
5455 error ("%q#D has incomplete type", decl
);
5456 TREE_TYPE (decl
) = error_mark_node
;
5460 /* There is no way to make a variable-sized class type in GNU C++. */
5461 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5463 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5465 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5466 if (SCALAR_TYPE_P (type
))
5470 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5471 init
= build_zero_init (type
, NULL_TREE
, false);
5473 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5475 error ("scalar object %qD requires one element in initializer",
5477 TREE_TYPE (decl
) = error_mark_node
;
5483 if (TREE_CODE (decl
) == CONST_DECL
)
5485 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5487 DECL_INITIAL (decl
) = init
;
5489 gcc_assert (init
!= NULL_TREE
);
5492 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5494 else if (init
|| type_build_ctor_call (type
)
5495 || TREE_CODE (type
) == REFERENCE_TYPE
)
5497 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5499 init
= grok_reference_init (decl
, type
, init
, flags
);
5500 flags
|= LOOKUP_ALREADY_DIGESTED
;
5503 check_for_uninitialized_const_var (decl
);
5504 /* Do not reshape constructors of vectors (they don't need to be
5506 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5508 if (is_std_init_list (type
))
5510 init
= perform_implicit_conversion (type
, init
,
5511 tf_warning_or_error
);
5512 flags
|= LOOKUP_ALREADY_DIGESTED
;
5514 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5516 /* Don't reshape if the class has constructors. */
5517 if (cxx_dialect
== cxx98
)
5518 error ("in C++98 %qD must be initialized by constructor, "
5522 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5524 error ("opaque vector types cannot be initialized");
5525 init
= error_mark_node
;
5529 init
= reshape_init (type
, init
, tf_warning_or_error
);
5530 if (SCALAR_TYPE_P (type
))
5531 check_narrowing (type
, init
);
5535 /* If DECL has an array type without a specific bound, deduce the
5536 array size from the initializer. */
5537 maybe_deduce_size_from_array_init (decl
, init
);
5538 type
= TREE_TYPE (decl
);
5539 if (type
== error_mark_node
)
5542 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5543 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5544 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5545 && CP_AGGREGATE_TYPE_P (type
)))
5547 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5549 /* If this is a constexpr initializer, expand_default_init will
5550 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5551 case, pull the initializer back out and pass it down into
5552 store_init_value. */
5553 while (TREE_CODE (init_code
) == EXPR_STMT
5554 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5555 init_code
= TREE_OPERAND (init_code
, 0);
5556 if (TREE_CODE (init_code
) == INIT_EXPR
)
5558 init
= TREE_OPERAND (init_code
, 1);
5559 init_code
= NULL_TREE
;
5560 /* Don't call digest_init; it's unnecessary and will complain
5561 about aggregate initialization of non-aggregate classes. */
5562 flags
|= LOOKUP_ALREADY_DIGESTED
;
5564 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5566 /* Declared constexpr, but no suitable initializer; massage
5567 init appropriately so we can pass it into store_init_value
5569 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5570 init
= finish_compound_literal (type
, init
,
5571 tf_warning_or_error
);
5572 else if (CLASS_TYPE_P (type
)
5573 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5575 init
= build_functional_cast (type
, init
, tf_none
);
5576 if (init
!= error_mark_node
)
5577 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5579 init_code
= NULL_TREE
;
5585 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5587 /* In aggregate initialization of a variable, each element
5588 initialization is a full-expression because there is no
5589 enclosing expression. */
5590 gcc_assert (stmts_are_full_exprs_p ());
5592 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5594 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5595 && DECL_INITIAL (decl
)
5596 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5597 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5598 warning (0, "array %qD initialized by parenthesized string literal %qE",
5599 decl
, DECL_INITIAL (decl
));
5605 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5606 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5607 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5608 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5611 check_for_uninitialized_const_var (decl
);
5614 if (init
&& init
!= error_mark_node
)
5615 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5618 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5620 if (init_code
&& DECL_IN_AGGR_P (decl
))
5622 static int explained
= 0;
5624 if (cxx_dialect
< cxx0x
)
5625 error ("initializer invalid for static member with constructor");
5627 error ("non-constant in-class initialization invalid for static "
5628 "member %qD", decl
);
5631 error ("(an out of class initialization is required)");
5639 /* If DECL is not a local variable, give it RTL. */
5642 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5644 int toplev
= toplevel_bindings_p ();
5646 const char *filename
;
5648 /* Set the DECL_ASSEMBLER_NAME for the object. */
5651 /* The `register' keyword, when used together with an
5652 asm-specification, indicates that the variable should be
5653 placed in a particular register. */
5654 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5656 set_user_assembler_name (decl
, asmspec
);
5657 DECL_HARD_REGISTER (decl
) = 1;
5661 if (TREE_CODE (decl
) == FUNCTION_DECL
5662 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5663 set_builtin_user_assembler_name (decl
, asmspec
);
5664 set_user_assembler_name (decl
, asmspec
);
5668 /* Handle non-variables up front. */
5669 if (TREE_CODE (decl
) != VAR_DECL
)
5671 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5675 /* If we see a class member here, it should be a static data
5677 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5679 gcc_assert (TREE_STATIC (decl
));
5680 /* An in-class declaration of a static data member should be
5681 external; it is only a declaration, and not a definition. */
5682 if (init
== NULL_TREE
)
5683 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5686 /* We don't create any RTL for local variables. */
5687 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5690 /* We defer emission of local statics until the corresponding
5691 DECL_EXPR is expanded. */
5692 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5694 /* We try to defer namespace-scope static constants so that they are
5695 not emitted into the object file unnecessarily. */
5696 filename
= input_filename
;
5697 if (!DECL_VIRTUAL_P (decl
)
5698 && TREE_READONLY (decl
)
5699 && DECL_INITIAL (decl
) != NULL_TREE
5700 && DECL_INITIAL (decl
) != error_mark_node
5702 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5704 && !TREE_PUBLIC (decl
))
5706 /* Fool with the linkage of static consts according to #pragma
5708 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5709 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5711 TREE_PUBLIC (decl
) = 1;
5712 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5717 /* Likewise for template instantiations. */
5718 else if (DECL_LANG_SPECIFIC (decl
)
5719 && DECL_IMPLICIT_INSTANTIATION (decl
))
5722 /* If we're not deferring, go ahead and assemble the variable. */
5724 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5727 /* walk_tree helper for wrap_temporary_cleanups, below. */
5730 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5732 /* Stop at types or full-expression boundaries. */
5733 if (TYPE_P (*stmt_p
)
5734 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5740 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5742 tree guard
= (tree
)data
;
5743 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5745 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5746 /* Tell honor_protect_cleanup_actions to handle this as a separate
5748 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5750 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5756 /* We're initializing a local variable which has a cleanup GUARD. If there
5757 are any temporaries used in the initializer INIT of this variable, we
5758 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5759 variable will be cleaned up properly if one of them throws.
5761 Unfortunately, there's no way to express this properly in terms of
5762 nesting, as the regions for the temporaries overlap the region for the
5763 variable itself; if there are two temporaries, the variable needs to be
5764 the first thing destroyed if either of them throws. However, we only
5765 want to run the variable's cleanup if it actually got constructed. So
5766 we need to guard the temporary cleanups with the variable's cleanup if
5767 they are run on the normal path, but not if they are run on the
5768 exceptional path. We implement this by telling
5769 honor_protect_cleanup_actions to strip the variable cleanup from the
5770 exceptional path. */
5773 wrap_temporary_cleanups (tree init
, tree guard
)
5775 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5778 /* Generate code to initialize DECL (a local variable). */
5781 initialize_local_var (tree decl
, tree init
)
5783 tree type
= TREE_TYPE (decl
);
5787 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5788 || TREE_CODE (decl
) == RESULT_DECL
);
5789 gcc_assert (!TREE_STATIC (decl
));
5791 if (DECL_SIZE (decl
) == NULL_TREE
)
5793 /* If we used it already as memory, it must stay in memory. */
5794 DECL_INITIAL (decl
) = NULL_TREE
;
5795 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5799 if (type
== error_mark_node
)
5802 /* Compute and store the initial value. */
5803 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5804 if (TREE_USED (type
))
5805 DECL_READ_P (decl
) = 1;
5807 /* Generate a cleanup, if necessary. */
5808 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5810 /* Perform the initialization. */
5813 if (TREE_CODE (init
) == INIT_EXPR
5814 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5816 /* Stick simple initializers in DECL_INITIAL so that
5817 -Wno-init-self works (c++/34772). */
5818 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5819 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5823 int saved_stmts_are_full_exprs_p
;
5825 /* If we're only initializing a single object, guard the
5826 destructors of any temporaries used in its initializer with
5827 its destructor. This isn't right for arrays because each
5828 element initialization is a full-expression. */
5829 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5830 wrap_temporary_cleanups (init
, cleanup
);
5832 gcc_assert (building_stmt_list_p ());
5833 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5834 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5835 finish_expr_stmt (init
);
5836 current_stmt_tree ()->stmts_are_full_exprs_p
=
5837 saved_stmts_are_full_exprs_p
;
5841 /* Set this to 0 so we can tell whether an aggregate which was
5842 initialized was ever used. Don't do this if it has a
5843 destructor, so we don't complain about the 'resource
5844 allocation is initialization' idiom. Now set
5845 attribute((unused)) on types so decls of that type will be
5846 marked used. (see TREE_USED, above.) */
5847 if (TYPE_NEEDS_CONSTRUCTING (type
)
5849 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5850 && DECL_NAME (decl
))
5851 TREE_USED (decl
) = 0;
5852 else if (already_used
)
5853 TREE_USED (decl
) = 1;
5856 finish_decl_cleanup (decl
, cleanup
);
5859 /* DECL is a VAR_DECL for a compiler-generated variable with static
5860 storage duration (like a virtual table) whose initializer is a
5861 compile-time constant. Initialize the variable and provide it to the
5865 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5868 gcc_assert (DECL_ARTIFICIAL (decl
));
5869 init
= build_constructor (TREE_TYPE (decl
), v
);
5870 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5871 DECL_INITIAL (decl
) = init
;
5872 DECL_INITIALIZED_P (decl
) = 1;
5873 determine_visibility (decl
);
5874 layout_var_decl (decl
);
5875 maybe_commonize_var (decl
);
5876 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5879 /* INIT is the initializer for a variable, as represented by the
5880 parser. Returns true iff INIT is type-dependent. */
5883 type_dependent_init_p (tree init
)
5885 if (TREE_CODE (init
) == TREE_LIST
)
5886 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5887 return any_type_dependent_elements_p (init
);
5888 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5889 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5891 VEC(constructor_elt
, gc
) *elts
;
5895 elts
= CONSTRUCTOR_ELTS (init
);
5896 nelts
= VEC_length (constructor_elt
, elts
);
5897 for (i
= 0; i
< nelts
; ++i
)
5898 if (type_dependent_init_p (VEC_index (constructor_elt
,
5903 /* It must be a simple expression, e.g., int i = 3; */
5904 return type_dependent_expression_p (init
);
5909 /* INIT is the initializer for a variable, as represented by the
5910 parser. Returns true iff INIT is value-dependent. */
5913 value_dependent_init_p (tree init
)
5915 if (TREE_CODE (init
) == TREE_LIST
)
5916 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5917 return any_value_dependent_elements_p (init
);
5918 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5919 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5921 VEC(constructor_elt
, gc
) *elts
;
5925 elts
= CONSTRUCTOR_ELTS (init
);
5926 nelts
= VEC_length (constructor_elt
, elts
);
5927 for (i
= 0; i
< nelts
; ++i
)
5928 if (value_dependent_init_p (VEC_index (constructor_elt
,
5933 /* It must be a simple expression, e.g., int i = 3; */
5934 return value_dependent_expression_p (init
);
5939 /* Finish processing of a declaration;
5940 install its line number and initial value.
5941 If the length of an array type is not known before,
5942 it must be determined now, from the initial value, or it is an error.
5944 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5945 true, then INIT is an integral constant expression.
5947 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5948 if the (init) syntax was used. */
5951 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5952 tree asmspec_tree
, int flags
)
5955 VEC(tree
,gc
) *cleanups
= NULL
;
5956 const char *asmspec
= NULL
;
5957 int was_readonly
= 0;
5958 bool var_definition_p
= false;
5961 if (decl
== error_mark_node
)
5966 error ("assignment (not initialization) in declaration");
5970 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5971 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5972 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5974 type
= TREE_TYPE (decl
);
5975 if (type
== error_mark_node
)
5978 /* If a name was specified, get the string. */
5979 if (at_namespace_scope_p ())
5980 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5981 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5982 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5984 if (current_class_type
5985 && CP_DECL_CONTEXT (decl
) == current_class_type
5986 && TYPE_BEING_DEFINED (current_class_type
)
5987 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
5988 && (DECL_INITIAL (decl
) || init
))
5989 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5991 auto_node
= type_uses_auto (type
);
5995 if (init
== NULL_TREE
)
5997 error ("declaration of %q#D has no initializer", decl
);
5998 TREE_TYPE (decl
) = error_mark_node
;
6002 if (TREE_CODE (d_init
) == TREE_LIST
)
6003 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6004 tf_warning_or_error
);
6005 d_init
= resolve_nondeduced_context (d_init
);
6006 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6008 if (type
== error_mark_node
)
6012 if (!ensure_literal_type_for_constexpr_object (decl
))
6013 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6015 if (TREE_CODE (decl
) == VAR_DECL
6016 && DECL_CLASS_SCOPE_P (decl
)
6017 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6018 check_static_variable_definition (decl
, type
);
6020 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6023 if (init
== ridpointers
[(int)RID_DELETE
])
6025 /* FIXME check this is 1st decl. */
6026 DECL_DELETED_FN (decl
) = 1;
6027 DECL_DECLARED_INLINE_P (decl
) = 1;
6028 DECL_INITIAL (decl
) = error_mark_node
;
6029 FOR_EACH_CLONE (clone
, decl
)
6031 DECL_DELETED_FN (clone
) = 1;
6032 DECL_DECLARED_INLINE_P (clone
) = 1;
6033 DECL_INITIAL (clone
) = error_mark_node
;
6037 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6039 if (defaultable_fn_check (decl
))
6040 DECL_DEFAULTED_FN (decl
) = 1;
6042 DECL_INITIAL (decl
) = NULL_TREE
;
6046 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6048 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6049 /* If DECL is a reference, then we want to know whether init is a
6050 reference constant; init_const_expr_p as passed tells us whether
6051 it's an rvalue constant. */
6052 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6053 init_const_expr_p
= potential_constant_expression (init
);
6054 if (init_const_expr_p
)
6056 /* Set these flags now for templates. We'll update the flags in
6057 store_init_value for instantiations. */
6058 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6059 if (decl_maybe_constant_var_p (decl
))
6060 TREE_CONSTANT (decl
) = 1;
6064 if (processing_template_decl
)
6066 bool type_dependent_p
;
6068 /* Add this declaration to the statement-tree. */
6069 if (at_function_scope_p ())
6070 add_decl_expr (decl
);
6072 type_dependent_p
= dependent_type_p (type
);
6074 if (check_for_bare_parameter_packs (init
))
6077 DECL_INITIAL (decl
) = NULL_TREE
;
6080 /* Generally, initializers in templates are expanded when the
6081 template is instantiated. But, if DECL is a variable constant
6082 then it can be used in future constant expressions, so its value
6083 must be available. */
6085 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6086 /* We can't do anything if the decl has dependent type. */;
6088 && init_const_expr_p
6089 && !type_dependent_p
6090 && decl_maybe_constant_var_p (decl
)
6091 && !type_dependent_init_p (init
)
6092 && !value_dependent_init_p (init
))
6094 /* This variable seems to be a non-dependent constant, so process
6095 its initializer. If check_initializer returns non-null the
6096 initialization wasn't constant after all. */
6098 cleanups
= make_tree_vector ();
6099 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6100 if (init_code
== NULL_TREE
)
6102 release_tree_vector (cleanups
);
6104 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6105 /* Deduce array size even if the initializer is dependent. */
6106 maybe_deduce_size_from_array_init (decl
, init
);
6109 DECL_INITIAL (decl
) = init
;
6113 /* Just store non-static data member initializers for later. */
6114 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6115 DECL_INITIAL (decl
) = init
;
6117 /* Take care of TYPE_DECLs up front. */
6118 if (TREE_CODE (decl
) == TYPE_DECL
)
6120 if (type
!= error_mark_node
6121 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6123 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6124 warning (0, "shadowing previous type declaration of %q#D", decl
);
6125 set_identifier_type_value (DECL_NAME (decl
), decl
);
6128 /* If we have installed this as the canonical typedef for this
6129 type, and that type has not been defined yet, delay emitting
6130 the debug information for it, as we will emit it later. */
6131 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6132 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6133 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6135 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6140 /* A reference will be modified here, as it is initialized. */
6141 if (! DECL_EXTERNAL (decl
)
6142 && TREE_READONLY (decl
)
6143 && TREE_CODE (type
) == REFERENCE_TYPE
)
6146 TREE_READONLY (decl
) = 0;
6149 if (TREE_CODE (decl
) == VAR_DECL
)
6151 /* Only variables with trivial initialization and destruction can
6152 have thread-local storage. */
6153 if (DECL_THREAD_LOCAL_P (decl
)
6154 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
6155 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
6156 error ("%qD cannot be thread-local because it has non-trivial "
6157 "type %qT", decl
, TREE_TYPE (decl
));
6158 /* If this is a local variable that will need a mangled name,
6159 register it now. We must do this before processing the
6160 initializer for the variable, since the initialization might
6161 require a guard variable, and since the mangled name of the
6162 guard variable will depend on the mangled name of this
6164 if (DECL_FUNCTION_SCOPE_P (decl
)
6165 && TREE_STATIC (decl
)
6166 && !DECL_ARTIFICIAL (decl
))
6168 push_local_name (decl
);
6169 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6170 || DECL_DESTRUCTOR_P (current_function_decl
))
6171 /* Normally local_decls is populated during GIMPLE lowering,
6172 but [cd]tors are never actually compiled directly. We need
6173 to put statics on the list so we can deal with the label
6174 address extension. */
6175 add_local_decl (cfun
, decl
);
6178 /* Convert the initializer to the type of DECL, if we have not
6179 already initialized DECL. */
6180 if (!DECL_INITIALIZED_P (decl
)
6181 /* If !DECL_EXTERNAL then DECL is being defined. In the
6182 case of a static data member initialized inside the
6183 class-specifier, there can be an initializer even if DECL
6184 is *not* defined. */
6185 && (!DECL_EXTERNAL (decl
) || init
))
6187 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6190 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6191 /* Allow libjava/prims.cc define primitive classes. */
6192 if (init
!= NULL_TREE
6193 || jclass
== NULL_TREE
6194 || TREE_CODE (jclass
) != TYPE_DECL
6195 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6196 || !same_type_ignoring_top_level_qualifiers_p
6197 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6198 error ("Java object %qD not allocated with %<new%>", decl
);
6201 cleanups
= make_tree_vector ();
6202 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6203 /* Thread-local storage cannot be dynamically initialized. */
6204 if (DECL_THREAD_LOCAL_P (decl
) && init
)
6206 error ("%qD is thread-local and so cannot be dynamically "
6207 "initialized", decl
);
6211 /* Check that the initializer for a static data member was a
6212 constant. Although we check in the parser that the
6213 initializer is an integral constant expression, we do not
6214 simplify division-by-zero at the point at which it
6215 occurs. Therefore, in:
6217 struct S { static const int i = 7 / 0; };
6219 we issue an error at this point. It would
6220 probably be better to forbid division by zero in
6221 integral constant expressions. */
6222 if (DECL_EXTERNAL (decl
) && init
)
6224 error ("%qD cannot be initialized by a non-constant expression"
6225 " when being declared", decl
);
6226 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6234 The memory occupied by any object of static storage
6235 duration is zero-initialized at program startup before
6236 any other initialization takes place.
6238 We cannot create an appropriate initializer until after
6239 the type of DECL is finalized. If DECL_INITIAL is set,
6240 then the DECL is statically initialized, and any
6241 necessary zero-initialization has already been performed. */
6242 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6243 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6244 /*nelts=*/NULL_TREE
,
6245 /*static_storage_p=*/true);
6246 /* Remember that the initialization for this variable has
6248 DECL_INITIALIZED_P (decl
) = 1;
6249 /* This declaration is the definition of this variable,
6250 unless we are initializing a static data member within
6251 the class specifier. */
6252 if (!DECL_EXTERNAL (decl
))
6253 var_definition_p
= true;
6255 /* If the variable has an array type, lay out the type, even if
6256 there is no initializer. It is valid to index through the
6257 array, and we must get TYPE_ALIGN set correctly on the array
6259 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6262 if (TREE_STATIC (decl
)
6263 && !at_function_scope_p ()
6264 && current_function_decl
== NULL
)
6265 /* So decl is a global variable or a static member of a
6266 non local class. Record the types it uses
6267 so that we can decide later to emit debug info for them. */
6268 record_types_used_by_current_var_decl (decl
);
6270 else if (TREE_CODE (decl
) == FIELD_DECL
6271 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6272 error ("non-static data member %qD has Java class type", decl
);
6274 /* Add this declaration to the statement-tree. This needs to happen
6275 after the call to check_initializer so that the DECL_EXPR for a
6276 reference temp is added before the DECL_EXPR for the reference itself. */
6277 if (DECL_FUNCTION_SCOPE_P (decl
))
6278 add_decl_expr (decl
);
6280 /* Let the middle end know about variables and functions -- but not
6281 static data members in uninstantiated class templates. */
6282 if (TREE_CODE (decl
) == VAR_DECL
6283 || TREE_CODE (decl
) == FUNCTION_DECL
)
6285 if (TREE_CODE (decl
) == VAR_DECL
)
6287 layout_var_decl (decl
);
6288 maybe_commonize_var (decl
);
6291 /* This needs to happen after the linkage is set. */
6292 determine_visibility (decl
);
6294 if (var_definition_p
&& TREE_STATIC (decl
))
6296 /* If a TREE_READONLY variable needs initialization
6297 at runtime, it is no longer readonly and we need to
6298 avoid MEM_READONLY_P being set on RTL created for it. */
6301 if (TREE_READONLY (decl
))
6302 TREE_READONLY (decl
) = 0;
6305 else if (was_readonly
)
6306 TREE_READONLY (decl
) = 1;
6309 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6311 /* Check for abstractness of the type. Notice that there is no
6312 need to strip array types here since the check for those types
6313 is already done within create_array_type_for_decl. */
6314 if (TREE_CODE (type
) == FUNCTION_TYPE
6315 || TREE_CODE (type
) == METHOD_TYPE
)
6316 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6318 abstract_virtuals_error (decl
, type
);
6320 if (TREE_TYPE (decl
) == error_mark_node
)
6321 /* No initialization required. */
6323 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6327 if (init
== ridpointers
[(int)RID_DEFAULT
])
6329 /* An out-of-class default definition is defined at
6330 the point where it is explicitly defaulted. */
6331 if (DECL_DELETED_FN (decl
))
6332 maybe_explain_implicit_delete (decl
);
6333 else if (DECL_INITIAL (decl
) == error_mark_node
)
6334 synthesize_method (decl
);
6337 error ("function %q#D is initialized like a variable", decl
);
6339 /* else no initialization required. */
6341 else if (DECL_EXTERNAL (decl
)
6342 && ! (DECL_LANG_SPECIFIC (decl
)
6343 && DECL_NOT_REALLY_EXTERN (decl
)))
6346 DECL_INITIAL (decl
) = init
;
6348 /* A variable definition. */
6349 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6350 /* Initialize the local variable. */
6351 initialize_local_var (decl
, init
);
6353 /* If a variable is defined, and then a subsequent
6354 definition with external linkage is encountered, we will
6355 get here twice for the same variable. We want to avoid
6356 calling expand_static_init more than once. For variables
6357 that are not static data members, we can call
6358 expand_static_init only when we actually process the
6359 initializer. It is not legal to redeclare a static data
6360 member, so this issue does not arise in that case. */
6361 else if (var_definition_p
&& TREE_STATIC (decl
))
6362 expand_static_init (decl
, init
);
6365 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6366 reference, insert it in the statement-tree now. */
6370 FOR_EACH_VEC_ELT (tree
, cleanups
, i
, t
)
6371 push_cleanup (decl
, t
, false);
6372 release_tree_vector (cleanups
);
6376 TREE_READONLY (decl
) = 1;
6378 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6381 /* Returns a declaration for a VAR_DECL as if:
6383 extern "C" TYPE NAME;
6385 had been seen. Used to create compiler-generated global
6389 declare_global_var (tree name
, tree type
)
6393 push_to_top_level ();
6394 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6395 TREE_PUBLIC (decl
) = 1;
6396 DECL_EXTERNAL (decl
) = 1;
6397 DECL_ARTIFICIAL (decl
) = 1;
6398 /* If the user has explicitly declared this variable (perhaps
6399 because the code we are compiling is part of a low-level runtime
6400 library), then it is possible that our declaration will be merged
6401 with theirs by pushdecl. */
6402 decl
= pushdecl (decl
);
6403 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6404 pop_from_top_level ();
6409 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6410 if "__cxa_atexit" is not being used) corresponding to the function
6411 to be called when the program exits. */
6414 get_atexit_fn_ptr_type (void)
6418 if (!atexit_fn_ptr_type_node
)
6421 if (flag_use_cxa_atexit
6422 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6423 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6424 arg_type
= ptr_type_node
;
6426 /* The parameter to "atexit" is "void (*)(void)". */
6427 arg_type
= NULL_TREE
;
6429 fn_type
= build_function_type_list (void_type_node
,
6430 arg_type
, NULL_TREE
);
6431 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6434 return atexit_fn_ptr_type_node
;
6437 /* Returns a pointer to the `atexit' function. Note that if
6438 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6439 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6442 get_atexit_node (void)
6448 bool use_aeabi_atexit
;
6453 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6455 /* The declaration for `__cxa_atexit' is:
6457 int __cxa_atexit (void (*)(void *), void *, void *)
6459 We build up the argument types and then the function type
6461 tree argtype0
, argtype1
, argtype2
;
6463 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6464 /* First, build the pointer-to-function type for the first
6466 fn_ptr_type
= get_atexit_fn_ptr_type ();
6467 /* Then, build the rest of the argument types. */
6468 argtype2
= ptr_type_node
;
6469 if (use_aeabi_atexit
)
6471 argtype1
= fn_ptr_type
;
6472 argtype0
= ptr_type_node
;
6476 argtype1
= ptr_type_node
;
6477 argtype0
= fn_ptr_type
;
6479 /* And the final __cxa_atexit type. */
6480 fn_type
= build_function_type_list (integer_type_node
,
6481 argtype0
, argtype1
, argtype2
,
6483 fn_ptr_type
= build_pointer_type (fn_type
);
6484 if (use_aeabi_atexit
)
6485 name
= "__aeabi_atexit";
6487 name
= "__cxa_atexit";
6491 /* The declaration for `atexit' is:
6493 int atexit (void (*)());
6495 We build up the argument types and then the function type
6497 fn_ptr_type
= get_atexit_fn_ptr_type ();
6498 /* Build the final atexit type. */
6499 fn_type
= build_function_type_list (integer_type_node
,
6500 fn_ptr_type
, NULL_TREE
);
6504 /* Now, build the function declaration. */
6505 push_lang_context (lang_name_c
);
6506 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6507 mark_used (atexit_fndecl
);
6508 pop_lang_context ();
6509 atexit_node
= decay_conversion (atexit_fndecl
);
6514 /* Returns the __dso_handle VAR_DECL. */
6517 get_dso_handle_node (void)
6519 if (dso_handle_node
)
6520 return dso_handle_node
;
6522 /* Declare the variable. */
6523 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6526 #ifdef HAVE_GAS_HIDDEN
6527 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6528 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6531 return dso_handle_node
;
6534 /* Begin a new function with internal linkage whose job will be simply
6535 to destroy some particular variable. */
6537 static GTY(()) int start_cleanup_cnt
;
6540 start_cleanup_fn (void)
6545 bool use_cxa_atexit
= flag_use_cxa_atexit
6546 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6548 push_to_top_level ();
6550 /* No need to mangle this. */
6551 push_lang_context (lang_name_c
);
6553 /* Build the name of the function. */
6554 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6555 /* Build the function declaration. */
6556 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6557 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6558 /* It's a function with internal linkage, generated by the
6560 TREE_PUBLIC (fndecl
) = 0;
6561 DECL_ARTIFICIAL (fndecl
) = 1;
6562 /* Make the function `inline' so that it is only emitted if it is
6563 actually needed. It is unlikely that it will be inlined, since
6564 it is only called via a function pointer, but we avoid unnecessary
6565 emissions this way. */
6566 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6567 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6568 /* Build the parameter. */
6573 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6574 DECL_CONTEXT (parmdecl
) = fndecl
;
6575 TREE_USED (parmdecl
) = 1;
6576 DECL_READ_P (parmdecl
) = 1;
6577 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6581 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6583 pop_lang_context ();
6585 return current_function_decl
;
6588 /* Finish the cleanup function begun by start_cleanup_fn. */
6591 end_cleanup_fn (void)
6593 expand_or_defer_fn (finish_function (0));
6595 pop_from_top_level ();
6598 /* Generate code to handle the destruction of DECL, an object with
6599 static storage duration. */
6602 register_dtor_fn (tree decl
)
6609 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6611 type
= TREE_TYPE (decl
);
6612 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6613 return void_zero_node
;
6615 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6616 a class object, we can just pass the destructor to
6617 "__cxa_atexit"; we don't have to build a temporary function to do
6619 use_dtor
= (flag_use_cxa_atexit
6620 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6621 && CLASS_TYPE_P (type
));
6626 /* Find the destructor. */
6627 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6628 gcc_assert (idx
>= 0);
6629 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6630 /* Make sure it is accessible. */
6631 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6635 /* Call build_cleanup before we enter the anonymous function so
6636 that any access checks will be done relative to the current
6637 scope, rather than the scope of the anonymous function. */
6638 build_cleanup (decl
);
6640 /* Now start the function. */
6641 cleanup
= start_cleanup_fn ();
6643 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6644 to the original function, rather than the anonymous one. That
6645 will make the back end think that nested functions are in use,
6646 which causes confusion. */
6647 push_deferring_access_checks (dk_no_check
);
6648 fcall
= build_cleanup (decl
);
6649 pop_deferring_access_checks ();
6651 /* Create the body of the anonymous function. */
6652 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6653 finish_expr_stmt (fcall
);
6654 finish_compound_stmt (compound_stmt
);
6658 /* Call atexit with the cleanup function. */
6659 mark_used (cleanup
);
6660 cleanup
= build_address (cleanup
);
6661 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6667 /* We must convert CLEANUP to the type that "__cxa_atexit"
6669 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6670 /* "__cxa_atexit" will pass the address of DECL to the
6671 cleanup function. */
6673 addr
= build_address (decl
);
6674 /* The declared type of the parameter to "__cxa_atexit" is
6675 "void *". For plain "T*", we could just let the
6676 machinery in cp_build_function_call convert it -- but if the
6677 type is "cv-qualified T *", then we need to convert it
6678 before passing it in, to avoid spurious errors. */
6679 addr
= build_nop (ptr_type_node
, addr
);
6682 /* Since the cleanup functions we build ignore the address
6683 they're given, there's no reason to pass the actual address
6684 in, and, in general, it's cheaper to pass NULL than any
6686 addr
= null_pointer_node
;
6687 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6688 tf_warning_or_error
);
6689 if (targetm
.cxx
.use_aeabi_atexit ())
6702 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6703 arg0
, arg1
, arg2
, NULL_TREE
);
6706 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6707 is its initializer. Generate code to handle the construction
6708 and destruction of DECL. */
6711 expand_static_init (tree decl
, tree init
)
6713 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6714 gcc_assert (TREE_STATIC (decl
));
6716 /* Some variables require no dynamic initialization. */
6718 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6721 if (DECL_FUNCTION_SCOPE_P (decl
))
6723 /* Emit code to perform this initialization but once. */
6724 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6725 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6726 tree guard
, guard_addr
;
6729 /* Emit code to perform this initialization but once. This code
6732 static <type> guard;
6733 if (!guard.first_byte) {
6734 if (__cxa_guard_acquire (&guard)) {
6737 // Do initialization.
6738 flag = true; __cxa_guard_release (&guard);
6739 // Register variable for destruction at end of program.
6741 if (!flag) __cxa_guard_abort (&guard);
6745 Note that the `flag' variable is only set to 1 *after* the
6746 initialization is complete. This ensures that an exception,
6747 thrown during the construction, will cause the variable to
6748 reinitialized when we pass through this code again, as per:
6752 If the initialization exits by throwing an exception, the
6753 initialization is not complete, so it will be tried again
6754 the next time control enters the declaration.
6756 This process should be thread-safe, too; multiple threads
6757 should not be able to initialize the variable more than
6760 /* Create the guard variable. */
6761 guard
= get_guard (decl
);
6763 /* This optimization isn't safe on targets with relaxed memory
6764 consistency. On such targets we force synchronization in
6765 __cxa_guard_acquire. */
6766 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6768 /* Begin the conditional initialization. */
6769 if_stmt
= begin_if_stmt ();
6770 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6771 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6774 if (flag_threadsafe_statics
)
6776 tree vfntype
= NULL_TREE
;
6777 tree acquire_name
, release_name
, abort_name
;
6778 tree acquire_fn
, release_fn
, abort_fn
;
6779 guard_addr
= build_address (guard
);
6781 acquire_name
= get_identifier ("__cxa_guard_acquire");
6782 release_name
= get_identifier ("__cxa_guard_release");
6783 abort_name
= get_identifier ("__cxa_guard_abort");
6784 acquire_fn
= identifier_global_value (acquire_name
);
6785 release_fn
= identifier_global_value (release_name
);
6786 abort_fn
= identifier_global_value (abort_name
);
6788 acquire_fn
= push_library_fn
6789 (acquire_name
, build_function_type_list (integer_type_node
,
6790 TREE_TYPE (guard_addr
),
6793 if (!release_fn
|| !abort_fn
)
6794 vfntype
= build_function_type_list (void_type_node
,
6795 TREE_TYPE (guard_addr
),
6798 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6800 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6802 inner_if_stmt
= begin_if_stmt ();
6803 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6806 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6807 begin
= get_target_expr (boolean_false_node
);
6808 flag
= TARGET_EXPR_SLOT (begin
);
6810 TARGET_EXPR_CLEANUP (begin
)
6811 = build3 (COND_EXPR
, void_type_node
, flag
,
6813 build_call_n (abort_fn
, 1, guard_addr
));
6814 CLEANUP_EH_ONLY (begin
) = 1;
6816 /* Do the initialization itself. */
6817 init
= add_stmt_to_compound (begin
, init
);
6818 init
= add_stmt_to_compound
6819 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6820 init
= add_stmt_to_compound
6821 (init
, build_call_n (release_fn
, 1, guard_addr
));
6824 init
= add_stmt_to_compound (init
, set_guard (guard
));
6826 /* Use atexit to register a function for destroying this static
6828 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6830 finish_expr_stmt (init
);
6832 if (flag_threadsafe_statics
)
6834 finish_compound_stmt (inner_then_clause
);
6835 finish_then_clause (inner_if_stmt
);
6836 finish_if_stmt (inner_if_stmt
);
6839 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6841 finish_compound_stmt (then_clause
);
6842 finish_then_clause (if_stmt
);
6843 finish_if_stmt (if_stmt
);
6847 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6851 /* Make TYPE a complete type based on INITIAL_VALUE.
6852 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6853 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6854 3 if the initializer list is empty (in pedantic mode). */
6857 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6860 tree type
, elt_type
;
6864 unsigned HOST_WIDE_INT i
;
6867 /* An array of character type can be initialized from a
6868 brace-enclosed string constant.
6870 FIXME: this code is duplicated from reshape_init. Probably
6871 we should just call reshape_init here? */
6872 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6873 && TREE_CODE (initial_value
) == CONSTRUCTOR
6874 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6876 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6877 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6879 if (TREE_CODE (value
) == STRING_CST
6880 && VEC_length (constructor_elt
, v
) == 1)
6881 initial_value
= value
;
6884 /* If any of the elements are parameter packs, we can't actually
6885 complete this type now because the array size is dependent. */
6886 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6888 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6891 if (PACK_EXPANSION_P (value
))
6897 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6899 /* We can create the array before the element type is complete, which
6900 means that we didn't have these two bits set in the original type
6901 either. In completing the type, we are expected to propagate these
6902 bits. See also complete_type which does the same thing for arrays
6905 if (TYPE_DOMAIN (type
))
6907 elt_type
= TREE_TYPE (type
);
6908 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6909 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6910 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6916 /* As above, but either give an error or reject zero-size arrays, depending
6920 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
6921 bool do_default
, tsubst_flags_t complain
)
6924 bool sfinae
= !(complain
& tf_error
);
6925 /* In SFINAE context we can't be lenient about zero-size arrays. */
6928 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
6934 /* Not an error. */;
6935 else if (failure
== 1)
6936 error ("initializer fails to determine size of %qT", *ptype
);
6937 else if (failure
== 2)
6940 error ("array size missing in %qT", *ptype
);
6942 else if (failure
== 3)
6943 error ("zero-size array %qT", *ptype
);
6944 *ptype
= error_mark_node
;
6949 /* Return zero if something is declared to be a member of type
6950 CTYPE when in the context of CUR_TYPE. STRING is the error
6951 message to print in that case. Otherwise, quietly return 1. */
6954 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6956 if (ctype
&& ctype
!= cur_type
)
6958 if (flags
== DTOR_FLAG
)
6959 error ("destructor for alien class %qT cannot be a member", ctype
);
6961 error ("constructor for alien class %qT cannot be a member", ctype
);
6967 /* Subroutine of `grokdeclarator'. */
6969 /* Generate errors possibly applicable for a given set of specifiers.
6970 This is for ARM $7.1.2. */
6973 bad_specifiers (tree object
,
6974 enum bad_spec_place type
,
6985 error ("%qD declared as a %<virtual%> variable", object
);
6987 error ("%qD declared as an %<inline%> variable", object
);
6989 error ("%<const%> and %<volatile%> function specifiers on "
6990 "%qD invalid in variable declaration", object
);
6994 error ("%qD declared as a %<virtual%> parameter", object
);
6996 error ("%qD declared as an %<inline%> parameter", object
);
6998 error ("%<const%> and %<volatile%> function specifiers on "
6999 "%qD invalid in parameter declaration", object
);
7003 error ("%qD declared as a %<virtual%> type", object
);
7005 error ("%qD declared as an %<inline%> type", object
);
7007 error ("%<const%> and %<volatile%> function specifiers on "
7008 "%qD invalid in type declaration", object
);
7012 error ("%qD declared as a %<virtual%> field", object
);
7014 error ("%qD declared as an %<inline%> field", object
);
7016 error ("%<const%> and %<volatile%> function specifiers on "
7017 "%qD invalid in field declaration", object
);
7023 error ("%q+D declared as a friend", object
);
7025 && (TREE_CODE (object
) == TYPE_DECL
7026 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7027 && !TYPE_REFFN_P (TREE_TYPE (object
))
7028 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7029 error ("%q+D declared with an exception specification", object
);
7032 /* DECL is a member function or static data member and is presently
7033 being defined. Check that the definition is taking place in a
7037 check_class_member_definition_namespace (tree decl
)
7039 /* These checks only apply to member functions and static data
7041 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7042 || TREE_CODE (decl
) == VAR_DECL
);
7043 /* We check for problems with specializations in pt.c in
7044 check_specialization_namespace, where we can issue better
7046 if (processing_specialization
)
7048 /* There are no restrictions on the placement of
7049 explicit instantiations. */
7050 if (processing_explicit_instantiation
)
7054 A member function definition that appears outside of the
7055 class definition shall appear in a namespace scope enclosing
7056 the class definition.
7060 The definition for a static data member shall appear in a
7061 namespace scope enclosing the member's class definition. */
7062 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7063 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7064 decl
, DECL_CONTEXT (decl
));
7067 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7068 METHOD_TYPE for a non-static member function; QUALS are the
7069 cv-qualifiers that apply to the function. */
7072 build_this_parm (tree type
, cp_cv_quals quals
)
7077 cp_cv_quals this_quals
;
7079 if (CLASS_TYPE_P (type
))
7082 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7083 this_type
= build_pointer_type (this_type
);
7086 this_type
= type_of_this_parm (type
);
7087 /* The `this' parameter is implicitly `const'; it cannot be
7089 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7090 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7091 parm
= build_artificial_parm (this_identifier
, qual_type
);
7092 cp_apply_type_quals_to_decl (this_quals
, parm
);
7096 /* DECL is a static member function. Complain if it was declared
7097 with function-cv-quals. */
7100 check_static_quals (tree decl
, cp_cv_quals quals
)
7102 if (quals
!= TYPE_UNQUALIFIED
)
7103 error ("static member function %q#D declared with type qualifiers",
7107 /* CTYPE is class type, or null if non-class.
7108 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7110 DECLARATOR is the function's name.
7111 PARMS is a chain of PARM_DECLs for the function.
7112 VIRTUALP is truthvalue of whether the function is virtual or not.
7113 FLAGS are to be passed through to `grokclassfn'.
7114 QUALS are qualifiers indicating whether the function is `const'
7116 RAISES is a list of exceptions that this function can raise.
7117 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7118 not look, and -1 if we should not call `grokclassfn' at all.
7120 SFK is the kind of special function (if any) for the new function.
7122 Returns `NULL_TREE' if something goes wrong, after issuing
7123 applicable error messages. */
7126 grokfndecl (tree ctype
,
7130 tree orig_declarator
,
7132 enum overload_flags flags
,
7139 special_function_kind sfk
,
7144 location_t location
)
7147 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7151 type
= build_exception_variant (type
, raises
);
7153 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7155 /* If we have an explicit location, use it, otherwise use whatever
7156 build_lang_decl used (probably input_location). */
7157 if (location
!= UNKNOWN_LOCATION
)
7158 DECL_SOURCE_LOCATION (decl
) = location
;
7160 if (TREE_CODE (type
) == METHOD_TYPE
)
7163 parm
= build_this_parm (type
, quals
);
7164 DECL_CHAIN (parm
) = parms
;
7167 DECL_ARGUMENTS (decl
) = parms
;
7168 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7169 DECL_CONTEXT (t
) = decl
;
7170 /* Propagate volatile out from type to decl. */
7171 if (TYPE_VOLATILE (type
))
7172 TREE_THIS_VOLATILE (decl
) = 1;
7174 /* Setup decl according to sfk. */
7177 case sfk_constructor
:
7178 case sfk_copy_constructor
:
7179 case sfk_move_constructor
:
7180 DECL_CONSTRUCTOR_P (decl
) = 1;
7182 case sfk_destructor
:
7183 DECL_DESTRUCTOR_P (decl
) = 1;
7189 /* If pointers to member functions use the least significant bit to
7190 indicate whether a function is virtual, ensure a pointer
7191 to this function will have that bit clear. */
7192 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7193 && TREE_CODE (type
) == METHOD_TYPE
7194 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7195 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7198 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7202 ("defining explicit specialization %qD in friend declaration",
7206 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7207 tree args
= TREE_OPERAND (orig_declarator
, 1);
7209 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7211 /* Something like `template <class T> friend void f<T>()'. */
7212 error ("invalid use of template-id %qD in declaration "
7213 "of primary template",
7219 /* A friend declaration of the form friend void f<>(). Record
7220 the information in the TEMPLATE_ID_EXPR. */
7221 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7223 if (TREE_CODE (fns
) == COMPONENT_REF
)
7225 /* Due to bison parser ickiness, we will have already looked
7226 up an operator_name or PFUNCNAME within the current class
7227 (see template_id in parse.y). If the current class contains
7228 such a name, we'll get a COMPONENT_REF here. Undo that. */
7230 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7231 == current_class_type
);
7232 fns
= TREE_OPERAND (fns
, 1);
7234 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7235 || TREE_CODE (fns
) == OVERLOAD
);
7236 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7238 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7239 if (TREE_PURPOSE (t
)
7240 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7242 error ("default arguments are not allowed in declaration "
7243 "of friend template specialization %qD",
7250 error ("%<inline%> is not allowed in declaration of friend "
7251 "template specialization %qD",
7258 /* If this decl has namespace scope, set that up. */
7260 set_decl_namespace (decl
, in_namespace
, friendp
);
7262 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7264 /* `main' and builtins have implicit 'C' linkage. */
7265 if ((MAIN_NAME_P (declarator
)
7266 || (IDENTIFIER_LENGTH (declarator
) > 10
7267 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7268 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7269 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7270 && current_lang_name
== lang_name_cplusplus
7271 && ctype
== NULL_TREE
7272 && DECL_FILE_SCOPE_P (decl
))
7273 SET_DECL_LANGUAGE (decl
, lang_c
);
7275 /* Should probably propagate const out from type to decl I bet (mrs). */
7278 DECL_STATIC_FUNCTION_P (decl
) = 1;
7279 DECL_CONTEXT (decl
) = ctype
;
7284 DECL_CONTEXT (decl
) = ctype
;
7286 check_class_member_definition_namespace (decl
);
7289 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7291 if (processing_template_decl
)
7292 error ("cannot declare %<::main%> to be a template");
7294 error ("cannot declare %<::main%> to be inline");
7296 error ("cannot declare %<::main%> to be static");
7301 /* Members of anonymous types and local classes have no linkage; make
7302 them internal. If a typedef is made later, this will be changed. */
7303 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7304 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7307 if (publicp
&& cxx_dialect
== cxx98
)
7309 /* [basic.link]: A name with no linkage (notably, the name of a class
7310 or enumeration declared in a local scope) shall not be used to
7311 declare an entity with linkage.
7313 DR 757 relaxes this restriction for C++0x. */
7314 t
= no_linkage_check (TREE_TYPE (decl
),
7315 /*relaxed_p=*/false);
7318 if (TYPE_ANONYMOUS_P (t
))
7320 if (DECL_EXTERN_C_P (decl
))
7321 /* Allow this; it's pretty common in C. */;
7324 permerror (input_location
, "anonymous type with no linkage "
7325 "used to declare function %q#D with linkage",
7327 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7328 permerror (input_location
, "%q+#D does not refer to the unqualified "
7329 "type, so it is not used for linkage",
7334 permerror (input_location
, "type %qT with no linkage used to "
7335 "declare function %q#D with linkage", t
, decl
);
7339 TREE_PUBLIC (decl
) = publicp
;
7342 DECL_INTERFACE_KNOWN (decl
) = 1;
7343 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7346 /* If the declaration was declared inline, mark it as such. */
7348 DECL_DECLARED_INLINE_P (decl
) = 1;
7350 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7352 DECL_EXTERNAL (decl
) = 1;
7353 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7356 ? G_("static member function %qD cannot have cv-qualifier")
7357 : G_("non-member function %qD cannot have cv-qualifier"),
7359 quals
= TYPE_UNQUALIFIED
;
7362 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7363 && !grok_op_properties (decl
, /*complain=*/true))
7365 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7367 bool long_long_unsigned_p
;
7369 const char *suffix
= NULL
;
7370 /* [over.literal]/6: Literal operators shall not have C linkage. */
7371 if (DECL_LANGUAGE (decl
) == lang_c
)
7373 error ("literal operator with C linkage");
7377 if (DECL_NAMESPACE_SCOPE_P (decl
))
7379 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7382 error ("%qD has invalid argument list", decl
);
7386 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7387 if (long_long_unsigned_p
)
7389 if (cpp_interpret_int_suffix (suffix
, strlen (suffix
)))
7390 warning (0, "integer suffix %<%s%>"
7391 " shadowed by implementation", suffix
);
7393 else if (long_double_p
)
7395 if (cpp_interpret_float_suffix (suffix
, strlen (suffix
)))
7396 warning (0, "floating point suffix %<%s%>"
7397 " shadowed by implementation", suffix
);
7402 error ("%qD must be a non-member function", decl
);
7408 /* Make the init_value nonzero so pushdecl knows this is not
7409 tentative. error_mark_node is replaced later with the BLOCK. */
7410 DECL_INITIAL (decl
) = error_mark_node
;
7412 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7413 TREE_NOTHROW (decl
) = 1;
7415 /* Caller will do the rest of this. */
7419 if (ctype
!= NULL_TREE
)
7420 grokclassfn (ctype
, decl
, flags
);
7422 decl
= check_explicit_specialization (orig_declarator
, decl
,
7425 4 * (friendp
!= 0));
7426 if (decl
== error_mark_node
)
7429 if (DECL_STATIC_FUNCTION_P (decl
))
7430 check_static_quals (decl
, quals
);
7434 cplus_decl_attributes (&decl
, *attrlist
, 0);
7435 *attrlist
= NULL_TREE
;
7438 /* Check main's type after attributes have been applied. */
7439 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7441 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7444 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7446 error ("%<::main%> must return %<int%>");
7447 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7448 TREE_TYPE (decl
) = newtype
;
7451 check_main_parameter_types (decl
);
7454 if (ctype
!= NULL_TREE
7455 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7458 tree old_decl
= check_classfn (ctype
, decl
,
7459 (processing_template_decl
7460 > template_class_depth (ctype
))
7461 ? current_template_parms
7464 if (old_decl
== error_mark_node
)
7472 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7473 /* Because grokfndecl is always supposed to return a
7474 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7475 here. We depend on our callers to figure out that its
7476 really a template that's being returned. */
7477 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7479 if (DECL_STATIC_FUNCTION_P (old_decl
)
7480 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7482 /* Remove the `this' parm added by grokclassfn. */
7483 revert_static_member_fn (decl
);
7484 check_static_quals (decl
, quals
);
7486 if (DECL_ARTIFICIAL (old_decl
))
7488 error ("definition of implicitly-declared %qD", old_decl
);
7491 else if (DECL_DEFAULTED_FN (old_decl
))
7493 error ("definition of explicitly-defaulted %q+D", decl
);
7494 error ("%q+#D explicitly defaulted here", old_decl
);
7498 /* Since we've smashed OLD_DECL to its
7499 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7500 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7501 decl
= DECL_TEMPLATE_RESULT (decl
);
7503 /* Attempt to merge the declarations. This can fail, in
7504 the case of some invalid specialization declarations. */
7505 pushed_scope
= push_scope (ctype
);
7506 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7508 pop_scope (pushed_scope
);
7511 error ("no %q#D member function declared in class %qT",
7519 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7522 if (ctype
== NULL_TREE
|| check
)
7526 DECL_VIRTUAL_P (decl
) = 1;
7531 /* decl is a FUNCTION_DECL.
7532 specifiers are the parsed virt-specifiers.
7534 Set flags to reflect the virt-specifiers.
7539 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7541 if (decl
== NULL_TREE
)
7543 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7544 DECL_OVERRIDE_P (decl
) = 1;
7545 if (specifiers
& VIRT_SPEC_FINAL
)
7546 DECL_FINAL_P (decl
) = 1;
7550 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7551 the linkage that DECL will receive in the object file. */
7554 set_linkage_for_static_data_member (tree decl
)
7556 /* A static data member always has static storage duration and
7557 external linkage. Note that static data members are forbidden in
7558 local classes -- the only situation in which a class has
7559 non-external linkage. */
7560 TREE_PUBLIC (decl
) = 1;
7561 TREE_STATIC (decl
) = 1;
7562 /* For non-template classes, static data members are always put
7563 out in exactly those files where they are defined, just as
7564 with ordinary namespace-scope variables. */
7565 if (!processing_template_decl
)
7566 DECL_INTERFACE_KNOWN (decl
) = 1;
7569 /* Create a VAR_DECL named NAME with the indicated TYPE.
7571 If SCOPE is non-NULL, it is the class type or namespace containing
7572 the variable. If SCOPE is NULL, the variable should is created in
7573 the innermost enclosings scope. */
7576 grokvardecl (tree type
,
7578 const cp_decl_specifier_seq
*declspecs
,
7584 tree explicit_scope
;
7586 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7588 /* Compute the scope in which to place the variable, but remember
7589 whether or not that scope was explicitly specified by the user. */
7590 explicit_scope
= scope
;
7593 /* An explicit "extern" specifier indicates a namespace-scope
7595 if (declspecs
->storage_class
== sc_extern
)
7596 scope
= current_decl_namespace ();
7597 else if (!at_function_scope_p ())
7598 scope
= current_scope ();
7602 && (/* If the variable is a namespace-scope variable declared in a
7603 template, we need DECL_LANG_SPECIFIC. */
7604 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7605 /* Similarly for namespace-scope variables with language linkage
7607 || (TREE_CODE (scope
) == NAMESPACE_DECL
7608 && current_lang_name
!= lang_name_cplusplus
)
7609 /* Similarly for static data members. */
7611 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7613 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7615 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7616 set_decl_namespace (decl
, explicit_scope
, 0);
7618 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7620 if (declspecs
->storage_class
== sc_extern
)
7622 DECL_THIS_EXTERN (decl
) = 1;
7623 DECL_EXTERNAL (decl
) = !initialized
;
7626 if (DECL_CLASS_SCOPE_P (decl
))
7628 set_linkage_for_static_data_member (decl
);
7629 /* This function is only called with out-of-class definitions. */
7630 DECL_EXTERNAL (decl
) = 0;
7631 check_class_member_definition_namespace (decl
);
7633 /* At top level, either `static' or no s.c. makes a definition
7634 (perhaps tentative), and absence of `static' makes it public. */
7635 else if (toplevel_bindings_p ())
7637 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7638 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7639 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7641 /* Not at top level, only `static' makes a static definition. */
7644 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7645 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7648 if (declspecs
->specs
[(int)ds_thread
])
7649 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7651 /* If the type of the decl has no linkage, make sure that we'll
7652 notice that in mark_used. */
7653 if (cxx_dialect
> cxx98
7654 && decl_linkage (decl
) != lk_none
7655 && DECL_LANG_SPECIFIC (decl
) == NULL
7656 && !DECL_EXTERN_C_P (decl
)
7657 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7658 retrofit_lang_decl (decl
);
7660 if (TREE_PUBLIC (decl
))
7662 /* [basic.link]: A name with no linkage (notably, the name of a class
7663 or enumeration declared in a local scope) shall not be used to
7664 declare an entity with linkage.
7666 DR 757 relaxes this restriction for C++0x. */
7667 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7668 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7671 if (TYPE_ANONYMOUS_P (t
))
7673 if (DECL_EXTERN_C_P (decl
))
7674 /* Allow this; it's pretty common in C. */
7678 /* DRs 132, 319 and 389 seem to indicate types with
7679 no linkage can only be used to declare extern "C"
7680 entities. Since it's not always an error in the
7681 ISO C++ 90 Standard, we only issue a warning. */
7682 warning (0, "anonymous type with no linkage used to declare "
7683 "variable %q#D with linkage", decl
);
7684 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7685 warning (0, "%q+#D does not refer to the unqualified "
7686 "type, so it is not used for linkage",
7691 warning (0, "type %qT with no linkage used to declare variable "
7692 "%q#D with linkage", t
, decl
);
7696 DECL_INTERFACE_KNOWN (decl
) = 1;
7701 /* Create and return a canonical pointer to member function type, for
7702 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7705 build_ptrmemfunc_type (tree type
)
7709 tree unqualified_variant
= NULL_TREE
;
7711 if (type
== error_mark_node
)
7714 /* If a canonical type already exists for this type, use it. We use
7715 this method instead of type_hash_canon, because it only does a
7716 simple equality check on the list of field members. */
7718 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7721 /* Make sure that we always have the unqualified pointer-to-member
7723 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7725 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7727 t
= make_class_type (RECORD_TYPE
);
7728 xref_basetypes (t
, NULL_TREE
);
7730 /* Let the front end know this is a pointer to member function... */
7731 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7732 /* ... and not really a class type. */
7733 SET_CLASS_TYPE_P (t
, 0);
7735 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7738 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7740 DECL_CHAIN (field
) = fields
;
7743 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7745 /* Zap out the name so that the back end will give us the debugging
7746 information for this anonymous RECORD_TYPE. */
7747 TYPE_NAME (t
) = NULL_TREE
;
7749 /* If this is not the unqualified form of this pointer-to-member
7750 type, set the TYPE_MAIN_VARIANT for this type to be the
7751 unqualified type. Since they are actually RECORD_TYPEs that are
7752 not variants of each other, we must do this manually.
7753 As we just built a new type there is no need to do yet another copy. */
7754 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7756 int type_quals
= cp_type_quals (type
);
7757 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7758 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7759 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7760 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7761 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7762 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7763 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7766 /* Cache this pointer-to-member type so that we can find it again
7768 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7770 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7771 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7772 else if (TYPE_CANONICAL (type
) != type
)
7773 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7778 /* Create and return a pointer to data member type. */
7781 build_ptrmem_type (tree class_type
, tree member_type
)
7783 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7785 cp_cv_quals quals
= type_memfn_quals (member_type
);
7786 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7787 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7791 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7792 return build_offset_type (class_type
, member_type
);
7796 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7797 Check to see that the definition is valid. Issue appropriate error
7798 messages. Return 1 if the definition is particularly bad, or 0
7802 check_static_variable_definition (tree decl
, tree type
)
7804 /* Can't check yet if we don't know the type. */
7805 if (dependent_type_p (type
))
7807 /* If DECL is declared constexpr, we'll do the appropriate checks
7808 in check_initializer. */
7809 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
7811 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7813 if (!COMPLETE_TYPE_P (type
))
7814 error ("in-class initialization of static data member %q#D of "
7815 "incomplete type", decl
);
7816 else if (literal_type_p (type
))
7817 permerror (input_location
,
7818 "%<constexpr%> needed for in-class initialization of "
7819 "static data member %q#D of non-integral type", decl
);
7821 error ("in-class initialization of static data member %q#D of "
7822 "non-literal type", decl
);
7826 /* Motion 10 at San Diego: If a static const integral data member is
7827 initialized with an integral constant expression, the initializer
7828 may appear either in the declaration (within the class), or in
7829 the definition, but not both. If it appears in the class, the
7830 member is a member constant. The file-scope definition is always
7832 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7834 error ("invalid in-class initialization of static data member "
7835 "of non-integral type %qT",
7839 else if (!CP_TYPE_CONST_P (type
))
7840 error ("ISO C++ forbids in-class initialization of non-const "
7841 "static member %qD",
7843 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7844 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7845 "%qD of non-integral type %qT", decl
, type
);
7850 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7851 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7852 expressions out into temporary variables so that walk_tree doesn't
7853 step into them (c++/15764). */
7856 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
7858 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
7859 tree expr
= *expr_p
;
7860 if (TREE_CODE (expr
) == SAVE_EXPR
)
7862 tree op
= TREE_OPERAND (expr
, 0);
7863 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
7864 if (TREE_SIDE_EFFECTS (op
))
7865 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
7868 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
7873 /* Entry point for the above. */
7876 stabilize_vla_size (tree size
)
7878 struct pointer_set_t
*pset
= pointer_set_create ();
7879 /* Break out any function calls into temporary variables. */
7880 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
7883 /* Given the SIZE (i.e., number of elements) in an array, compute an
7884 appropriate index type for the array. If non-NULL, NAME is the
7885 name of the thing being declared. */
7888 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
7893 tree abi_1_itype
= NULL_TREE
;
7895 if (error_operand_p (size
))
7896 return error_mark_node
;
7898 type
= TREE_TYPE (size
);
7899 /* type_dependent_expression_p? */
7900 if (!dependent_type_p (type
))
7902 mark_rvalue_use (size
);
7904 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
7905 && TREE_SIDE_EFFECTS (size
))
7906 /* In C++98, we mark a non-constant array bound with a magic
7907 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7910 size
= fold_non_dependent_expr (size
);
7912 if (CLASS_TYPE_P (type
)
7913 && CLASSTYPE_LITERAL_P (type
))
7915 size
= build_expr_type_conversion (WANT_INT
, size
, true);
7918 if (!(complain
& tf_error
))
7919 return error_mark_node
;
7921 error ("size of array %qD has non-integral type %qT",
7924 error ("size of array has non-integral type %qT", type
);
7925 size
= integer_one_node
;
7927 if (size
== error_mark_node
)
7928 return error_mark_node
;
7929 type
= TREE_TYPE (size
);
7930 /* We didn't support this case in GCC 3.2, so don't bother
7931 trying to model it now in ABI v1. */
7932 abi_1_itype
= error_mark_node
;
7935 size
= maybe_constant_value (size
);
7936 if (!TREE_CONSTANT (size
))
7940 if (error_operand_p (size
))
7941 return error_mark_node
;
7943 /* The array bound must be an integer type. */
7944 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7946 if (!(complain
& tf_error
))
7947 return error_mark_node
;
7949 error ("size of array %qD has non-integral type %qT", name
, type
);
7951 error ("size of array has non-integral type %qT", type
);
7952 size
= integer_one_node
;
7953 type
= TREE_TYPE (size
);
7957 /* A type is dependent if it is...an array type constructed from any
7958 dependent type or whose size is specified by a constant expression
7959 that is value-dependent. */
7960 /* We can only call value_dependent_expression_p on integral constant
7961 expressions; treat non-constant expressions as dependent, too. */
7962 if (processing_template_decl
7963 && (dependent_type_p (type
)
7964 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
7966 /* We cannot do any checking for a SIZE that isn't known to be
7967 constant. Just build the index type and mark that it requires
7968 structural equality checks. */
7969 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7970 size
, integer_one_node
));
7971 TYPE_DEPENDENT_P (itype
) = 1;
7972 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7973 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7977 if (!abi_version_at_least (2) && processing_template_decl
7978 && abi_1_itype
== NULL_TREE
)
7979 /* For abi-1, we handled all instances in templates the same way,
7980 even when they were non-dependent. This affects the manglings
7981 produced. So, we do the normal checking for non-dependent
7982 sizes, but at the end we'll return the same type that abi-1
7983 would have, but with TYPE_CANONICAL set to the "right"
7984 value that the current ABI would provide. */
7985 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7986 osize
, integer_one_node
));
7988 /* Normally, the array-bound will be a constant. */
7989 if (TREE_CODE (size
) == INTEGER_CST
)
7991 /* Check to see if the array bound overflowed. Make that an
7992 error, no matter how generous we're being. */
7993 constant_expression_error (size
);
7995 /* An array must have a positive number of elements. */
7996 if (INT_CST_LT (size
, integer_zero_node
))
7998 if (!(complain
& tf_error
))
7999 return error_mark_node
;
8001 error ("size of array %qD is negative", name
);
8003 error ("size of array is negative");
8004 size
= integer_one_node
;
8006 /* As an extension we allow zero-sized arrays. */
8007 else if (integer_zerop (size
))
8009 if (!(complain
& tf_error
))
8010 /* We must fail if performing argument deduction (as
8011 indicated by the state of complain), so that
8012 another substitution can be found. */
8013 return error_mark_node
;
8014 else if (in_system_header
)
8015 /* Allow them in system headers because glibc uses them. */;
8017 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
8019 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
8022 else if (TREE_CONSTANT (size
)
8023 /* We don't allow VLAs at non-function scopes, or during
8024 tentative template substitution. */
8025 || !at_function_scope_p () || !(complain
& tf_error
))
8027 if (!(complain
& tf_error
))
8028 return error_mark_node
;
8029 /* `(int) &fn' is not a valid array bound. */
8031 error ("size of array %qD is not an integral constant-expression",
8034 error ("size of array is not an integral constant-expression");
8035 size
= integer_one_node
;
8037 else if (pedantic
&& warn_vla
!= 0)
8040 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8042 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8044 else if (warn_vla
> 0)
8048 "variable length array %qD is used", name
);
8051 "variable length array is used");
8054 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8055 /* A variable sized array. */
8056 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8059 HOST_WIDE_INT saved_processing_template_decl
;
8061 /* Compute the index of the largest element in the array. It is
8062 one less than the number of elements in the array. We save
8063 and restore PROCESSING_TEMPLATE_DECL so that computations in
8064 cp_build_binary_op will be appropriately folded. */
8065 saved_processing_template_decl
= processing_template_decl
;
8066 processing_template_decl
= 0;
8067 itype
= cp_build_binary_op (input_location
,
8069 cp_convert (ssizetype
, size
),
8070 cp_convert (ssizetype
, integer_one_node
),
8071 tf_warning_or_error
);
8072 itype
= fold (itype
);
8073 processing_template_decl
= saved_processing_template_decl
;
8075 if (!TREE_CONSTANT (itype
))
8076 /* A variable sized array. */
8077 itype
= variable_size (itype
);
8078 /* Make sure that there was no overflow when creating to a signed
8079 index type. (For example, on a 32-bit machine, an array with
8080 size 2^32 - 1 is too big.) */
8081 else if (TREE_CODE (itype
) == INTEGER_CST
8082 && TREE_OVERFLOW (itype
))
8084 if (!(complain
& tf_error
))
8085 return error_mark_node
;
8086 error ("overflow in array dimension");
8087 TREE_OVERFLOW (itype
) = 0;
8091 /* Create and return the appropriate index type. */
8092 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8094 tree t
= build_index_type (itype
);
8095 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8096 itype
= abi_1_itype
;
8099 itype
= build_index_type (itype
);
8101 /* If the index type were dependent, we would have returned early, so
8102 remember that it isn't. */
8103 TYPE_DEPENDENT_P (itype
) = 0;
8104 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8108 /* Returns the scope (if any) in which the entity declared by
8109 DECLARATOR will be located. If the entity was declared with an
8110 unqualified name, NULL_TREE is returned. */
8113 get_scope_of_declarator (const cp_declarator
*declarator
)
8115 while (declarator
&& declarator
->kind
!= cdk_id
)
8116 declarator
= declarator
->declarator
;
8118 /* If the declarator-id is a SCOPE_REF, the scope in which the
8119 declaration occurs is the first operand. */
8121 && declarator
->u
.id
.qualifying_scope
)
8122 return declarator
->u
.id
.qualifying_scope
;
8124 /* Otherwise, the declarator is not a qualified name; the entity will
8125 be declared in the current scope. */
8129 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8130 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8134 create_array_type_for_decl (tree name
, tree type
, tree size
)
8136 tree itype
= NULL_TREE
;
8138 /* If things have already gone awry, bail now. */
8139 if (type
== error_mark_node
|| size
== error_mark_node
)
8140 return error_mark_node
;
8142 /* 8.3.4/1: If the type of the identifier of D contains the auto
8143 type-specifier, the program is ill-formed. */
8144 if (pedantic
&& type_uses_auto (type
))
8145 pedwarn (input_location
, OPT_pedantic
,
8146 "declaration of %qD as array of %<auto%>", name
);
8148 /* If there are some types which cannot be array elements,
8149 issue an error-message and return. */
8150 switch (TREE_CODE (type
))
8154 error ("declaration of %qD as array of void", name
);
8156 error ("creating array of void");
8157 return error_mark_node
;
8161 error ("declaration of %qD as array of functions", name
);
8163 error ("creating array of functions");
8164 return error_mark_node
;
8166 case REFERENCE_TYPE
:
8168 error ("declaration of %qD as array of references", name
);
8170 error ("creating array of references");
8171 return error_mark_node
;
8175 error ("declaration of %qD as array of function members", name
);
8177 error ("creating array of function members");
8178 return error_mark_node
;
8186 The constant expressions that specify the bounds of the arrays
8187 can be omitted only for the first member of the sequence. */
8188 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8191 error ("declaration of %qD as multidimensional array must "
8192 "have bounds for all dimensions except the first",
8195 error ("multidimensional array must have bounds for all "
8196 "dimensions except the first");
8198 return error_mark_node
;
8201 /* Figure out the index type for the array. */
8203 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8206 T is called the array element type; this type shall not be [...] an
8207 abstract class type. */
8208 abstract_virtuals_error (name
, type
);
8210 return build_cplus_array_type (type
, itype
);
8213 /* Check that it's OK to declare a function with the indicated TYPE.
8214 SFK indicates the kind of special function (if any) that this
8215 function is. OPTYPE is the type given in a conversion operator
8216 declaration, or the class type for a constructor/destructor.
8217 Returns the actual return type of the function; that
8218 may be different than TYPE if an error occurs, or for certain
8219 special functions. */
8222 check_special_function_return_type (special_function_kind sfk
,
8228 case sfk_constructor
:
8230 error ("return type specification for constructor invalid");
8232 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8233 type
= build_pointer_type (optype
);
8235 type
= void_type_node
;
8238 case sfk_destructor
:
8240 error ("return type specification for destructor invalid");
8241 /* We can't use the proper return type here because we run into
8242 problems with ambiguous bases and covariant returns.
8243 Java classes are left unchanged because (void *) isn't a valid
8244 Java type, and we don't want to change the Java ABI. */
8245 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8246 type
= build_pointer_type (void_type_node
);
8248 type
= void_type_node
;
8251 case sfk_conversion
:
8253 error ("return type specified for %<operator %T%>", optype
);
8264 /* A variable or data member (whose unqualified name is IDENTIFIER)
8265 has been declared with the indicated TYPE. If the TYPE is not
8266 acceptable, issue an error message and return a type to use for
8267 error-recovery purposes. */
8270 check_var_type (tree identifier
, tree type
)
8272 if (VOID_TYPE_P (type
))
8275 error ("unnamed variable or field declared void");
8276 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8278 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8279 error ("variable or field %qE declared void", identifier
);
8282 error ("variable or field declared void");
8283 type
= error_mark_node
;
8289 /* Given declspecs and a declarator (abstract or otherwise), determine
8290 the name and type of the object declared and construct a DECL node
8293 DECLSPECS points to the representation of declaration-specifier
8294 sequence that precedes declarator.
8296 DECL_CONTEXT says which syntactic context this declaration is in:
8297 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8298 FUNCDEF for a function definition. Like NORMAL but a few different
8299 error messages in each case. Return value may be zero meaning
8300 this definition is too screwy to try to parse.
8301 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8302 handle member functions (which have FIELD context).
8303 Return value may be zero meaning this definition is too screwy to
8305 PARM for a parameter declaration (either within a function prototype
8306 or before a function body). Make a PARM_DECL, or return void_type_node.
8307 TPARM for a template parameter declaration.
8308 CATCHPARM for a parameter declaration before a catch clause.
8309 TYPENAME if for a typename (in a cast or sizeof).
8310 Don't make a DECL node; just return the ..._TYPE node.
8311 FIELD for a struct or union field; make a FIELD_DECL.
8312 BITFIELD for a field with specified width.
8314 INITIALIZED is as for start_decl.
8316 ATTRLIST is a pointer to the list of attributes, which may be NULL
8317 if there are none; *ATTRLIST may be modified if attributes from inside
8318 the declarator should be applied to the declaration.
8320 When this function is called, scoping variables (such as
8321 CURRENT_CLASS_TYPE) should reflect the scope in which the
8322 declaration occurs, not the scope in which the new declaration will
8323 be placed. For example, on:
8327 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8330 Returns a DECL (if a declarator is present), a TYPE (if there is no
8331 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8335 grokdeclarator (const cp_declarator
*declarator
,
8336 const cp_decl_specifier_seq
*declspecs
,
8337 enum decl_context decl_context
,
8341 tree type
= NULL_TREE
;
8343 int explicit_int128
= 0;
8344 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8345 int explicit_int
= 0;
8346 int explicit_char
= 0;
8347 int defaulted_int
= 0;
8348 tree dependent_name
= NULL_TREE
;
8350 tree typedef_decl
= NULL_TREE
;
8351 const char *name
= NULL
;
8352 tree typedef_type
= NULL_TREE
;
8353 /* True if this declarator is a function definition. */
8354 bool funcdef_flag
= false;
8355 cp_declarator_kind innermost_code
= cdk_error
;
8358 /* See the code below that used this. */
8359 tree decl_attr
= NULL_TREE
;
8362 /* Keep track of what sort of function is being processed
8363 so that we can warn about default return values, or explicit
8364 return values which do not match prescribed defaults. */
8365 special_function_kind sfk
= sfk_none
;
8367 tree dname
= NULL_TREE
;
8368 tree ctor_return_type
= NULL_TREE
;
8369 enum overload_flags flags
= NO_SPECIAL
;
8370 /* cv-qualifiers that apply to the declarator, for a declaration of
8371 a member function. */
8372 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8373 /* virt-specifiers that apply to the declarator, for a declaration of
8374 a member function. */
8375 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8376 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8378 tree raises
= NULL_TREE
;
8379 int template_count
= 0;
8380 tree returned_attrs
= NULL_TREE
;
8381 tree parms
= NULL_TREE
;
8382 const cp_declarator
*id_declarator
;
8383 /* The unqualified name of the declarator; either an
8384 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8385 tree unqualified_id
;
8386 /* The class type, if any, in which this entity is located,
8387 or NULL_TREE if none. Note that this value may be different from
8388 the current class type; for example if an attempt is made to declare
8389 "A::f" inside "B", this value will be "A". */
8390 tree ctype
= current_class_type
;
8391 /* The NAMESPACE_DECL for the namespace in which this entity is
8392 located. If an unqualified name is used to declare the entity,
8393 this value will be NULL_TREE, even if the entity is located at
8395 tree in_namespace
= NULL_TREE
;
8396 cp_storage_class storage_class
;
8397 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8398 bool type_was_error_mark_node
= false;
8399 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8400 bool template_type_arg
= false;
8401 bool template_parm_flag
= false;
8402 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
8405 signed_p
= declspecs
->specs
[(int)ds_signed
];
8406 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
8407 short_p
= declspecs
->specs
[(int)ds_short
];
8408 long_p
= declspecs
->specs
[(int)ds_long
];
8409 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
8410 explicit_int128
= declspecs
->explicit_int128_p
;
8411 thread_p
= declspecs
->specs
[(int)ds_thread
];
8413 if (decl_context
== FUNCDEF
)
8414 funcdef_flag
= true, decl_context
= NORMAL
;
8415 else if (decl_context
== MEMFUNCDEF
)
8416 funcdef_flag
= true, decl_context
= FIELD
;
8417 else if (decl_context
== BITFIELD
)
8418 bitfield
= 1, decl_context
= FIELD
;
8419 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8420 template_type_arg
= true, decl_context
= TYPENAME
;
8421 else if (decl_context
== TPARM
)
8422 template_parm_flag
= true, decl_context
= PARM
;
8424 if (initialized
> 1)
8425 funcdef_flag
= true;
8427 /* Look inside a declarator for the name being declared
8428 and get it as a string, for an error message. */
8429 for (id_declarator
= declarator
;
8431 id_declarator
= id_declarator
->declarator
)
8433 if (id_declarator
->kind
!= cdk_id
)
8434 innermost_code
= id_declarator
->kind
;
8436 switch (id_declarator
->kind
)
8439 if (id_declarator
->declarator
8440 && id_declarator
->declarator
->kind
== cdk_id
)
8442 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8443 if (sfk
== sfk_destructor
)
8450 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8451 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8454 if (qualifying_scope
)
8456 if (at_function_scope_p ())
8460 A declarator-id shall not be qualified except
8463 None of the cases are permitted in block
8465 if (qualifying_scope
== global_namespace
)
8466 error ("invalid use of qualified-name %<::%D%>",
8468 else if (TYPE_P (qualifying_scope
))
8469 error ("invalid use of qualified-name %<%T::%D%>",
8470 qualifying_scope
, decl
);
8472 error ("invalid use of qualified-name %<%D::%D%>",
8473 qualifying_scope
, decl
);
8474 return error_mark_node
;
8476 else if (TYPE_P (qualifying_scope
))
8478 ctype
= qualifying_scope
;
8479 if (!MAYBE_CLASS_TYPE_P (ctype
))
8481 error ("%q#T is not a class or a namespace", ctype
);
8484 else if (innermost_code
!= cdk_function
8485 && current_class_type
8486 && !UNIQUELY_DERIVED_FROM_P (ctype
,
8487 current_class_type
))
8489 error ("type %qT is not derived from type %qT",
8490 ctype
, current_class_type
);
8491 return error_mark_node
;
8494 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8495 in_namespace
= qualifying_scope
;
8497 switch (TREE_CODE (decl
))
8503 if (innermost_code
!= cdk_function
)
8505 error ("declaration of %qD as non-function", decl
);
8506 return error_mark_node
;
8508 else if (!qualifying_scope
8509 && !(current_class_type
&& at_class_scope_p ()))
8511 error ("declaration of %qD as non-member", decl
);
8512 return error_mark_node
;
8515 type
= TREE_OPERAND (decl
, 0);
8517 type
= constructor_name (type
);
8518 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8523 case TEMPLATE_ID_EXPR
:
8525 tree fns
= TREE_OPERAND (decl
, 0);
8528 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8530 gcc_assert (is_overloaded_fn (dname
));
8531 dname
= DECL_NAME (get_first_fn (dname
));
8536 case IDENTIFIER_NODE
:
8537 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8540 if (C_IS_RESERVED_WORD (dname
))
8542 error ("declarator-id missing; using reserved word %qD",
8544 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8546 else if (!IDENTIFIER_TYPENAME_P (dname
))
8547 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8550 gcc_assert (flags
== NO_SPECIAL
);
8551 flags
= TYPENAME_FLAG
;
8552 ctor_return_type
= TREE_TYPE (dname
);
8553 sfk
= sfk_conversion
;
8554 if (is_typename_at_global_scope (dname
))
8555 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8557 name
= "<invalid operator>";
8574 return error_mark_node
;
8579 if (id_declarator
->kind
== cdk_id
)
8585 The declarator in a function-definition shall have the form
8586 D1 ( parameter-declaration-clause) ... */
8587 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8589 error ("function definition does not declare parameters");
8590 return error_mark_node
;
8593 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8594 && innermost_code
!= cdk_function
8595 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8597 error ("declaration of %qD as non-function", dname
);
8598 return error_mark_node
;
8602 && TREE_CODE (dname
) == IDENTIFIER_NODE
8603 && UDLIT_OPER_P (dname
)
8604 && innermost_code
!= cdk_function
)
8606 error ("declaration of %qD as non-function", dname
);
8607 return error_mark_node
;
8610 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8612 if (declspecs
->specs
[(int)ds_typedef
])
8614 error ("declaration of %qD as %<typedef%>", dname
);
8615 return error_mark_node
;
8617 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8619 error ("declaration of %qD as parameter", dname
);
8620 return error_mark_node
;
8624 /* Anything declared one level down from the top level
8625 must be one of the parameters of a function
8626 (because the body is at least two levels down). */
8628 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8629 by not allowing C++ class definitions to specify their parameters
8630 with xdecls (must be spec.d in the parmlist).
8632 Since we now wait to push a class scope until we are sure that
8633 we are in a legitimate method context, we must set oldcname
8634 explicitly (since current_class_name is not yet alive).
8636 We also want to avoid calling this a PARM if it is in a namespace. */
8638 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8640 cp_binding_level
*b
= current_binding_level
;
8641 current_binding_level
= b
->level_chain
;
8642 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8643 decl_context
= PARM
;
8644 current_binding_level
= b
;
8648 name
= decl_context
== PARM
? "parameter" : "type name";
8650 if (constexpr_p
&& declspecs
->specs
[(int)ds_typedef
])
8652 error ("%<constexpr%> cannot appear in a typedef declaration");
8653 return error_mark_node
;
8656 /* If there were multiple types specified in the decl-specifier-seq,
8657 issue an error message. */
8658 if (declspecs
->multiple_types_p
)
8660 error ("two or more data types in declaration of %qs", name
);
8661 return error_mark_node
;
8664 if (declspecs
->conflicting_specifiers_p
)
8666 error ("conflicting specifiers in declaration of %qs", name
);
8667 return error_mark_node
;
8670 /* Extract the basic type from the decl-specifier-seq. */
8671 type
= declspecs
->type
;
8672 if (type
== error_mark_node
)
8675 type_was_error_mark_node
= true;
8677 /* If the entire declaration is itself tagged as deprecated then
8678 suppress reports of deprecated items. */
8679 if (type
&& TREE_DEPRECATED (type
)
8680 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8681 warn_deprecated_use (type
, NULL_TREE
);
8682 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8684 typedef_decl
= type
;
8685 type
= TREE_TYPE (typedef_decl
);
8686 if (TREE_DEPRECATED (type
)
8687 && DECL_ARTIFICIAL (typedef_decl
)
8688 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8689 warn_deprecated_use (type
, NULL_TREE
);
8691 /* No type at all: default to `int', and set DEFAULTED_INT
8692 because it was not a user-defined typedef. */
8693 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8695 /* These imply 'int'. */
8696 type
= integer_type_node
;
8700 explicit_int
= declspecs
->explicit_int_p
;
8701 explicit_char
= declspecs
->explicit_char_p
;
8704 /* See the code below that used this. */
8706 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8708 typedef_type
= type
;
8711 if (sfk
!= sfk_conversion
)
8712 ctor_return_type
= ctype
;
8714 if (sfk
!= sfk_none
)
8715 type
= check_special_function_return_type (sfk
, type
,
8717 else if (type
== NULL_TREE
)
8723 /* We handle `main' specially here, because 'main () { }' is so
8724 common. With no options, it is allowed. With -Wreturn-type,
8725 it is a warning. It is only an error with -pedantic-errors. */
8726 is_main
= (funcdef_flag
8727 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8728 && MAIN_NAME_P (dname
)
8729 && ctype
== NULL_TREE
8730 && in_namespace
== NULL_TREE
8731 && current_namespace
== global_namespace
);
8733 if (type_was_error_mark_node
)
8734 /* We've already issued an error, don't complain more. */;
8735 else if (in_system_header
|| flag_ms_extensions
)
8736 /* Allow it, sigh. */;
8738 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8740 pedwarn (input_location
, OPT_pedantic
,
8741 "ISO C++ forbids declaration of %qs with no type", name
);
8743 warning (OPT_Wreturn_type
,
8744 "ISO C++ forbids declaration of %qs with no type", name
);
8746 type
= integer_type_node
;
8751 if (explicit_int128
)
8753 if (int128_integer_type_node
== NULL_TREE
)
8755 error ("%<__int128%> is not supported by this target");
8756 explicit_int128
= false;
8758 else if (pedantic
&& ! in_system_header
)
8759 pedwarn (input_location
, OPT_pedantic
,
8760 "ISO C++ does not support %<__int128%> for %qs", name
);
8763 /* Now process the modifiers that were specified
8764 and check for invalid combinations. */
8766 /* Long double is a special combination. */
8767 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8770 type
= cp_build_qualified_type (long_double_type_node
,
8771 cp_type_quals (type
));
8774 /* Check all other uses of type modifiers. */
8776 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8780 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8781 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8782 else if (signed_p
&& unsigned_p
)
8783 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8784 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8785 error ("%<long long%> invalid for %qs", name
);
8786 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8787 error ("%<long%> invalid for %qs", name
);
8788 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8789 error ("%<short%> invalid for %qs", name
);
8790 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8791 error ("%<long%> or %<short%> invalid for %qs", name
);
8792 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8793 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8794 else if ((long_p
|| short_p
) && explicit_char
)
8795 error ("%<long%> or %<short%> specified with char for %qs", name
);
8796 else if (long_p
&& short_p
)
8797 error ("%<long%> and %<short%> specified together for %qs", name
);
8798 else if (type
== char16_type_node
|| type
== char32_type_node
)
8800 if (signed_p
|| unsigned_p
)
8801 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8802 else if (short_p
|| long_p
)
8803 error ("%<short%> or %<long%> invalid for %qs", name
);
8808 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8810 pedwarn (input_location
, OPT_pedantic
,
8811 "long, short, signed or unsigned used invalidly for %qs",
8813 if (flag_pedantic_errors
)
8818 /* Discard the type modifiers if they are invalid. */
8829 /* Decide whether an integer type is signed or not.
8830 Optionally treat bitfields as signed by default. */
8834 It is implementation-defined whether a plain (neither
8835 explicitly signed or unsigned) char, short, int, or long
8836 bit-field is signed or unsigned.
8838 Naturally, we extend this to long long as well. Note that
8839 this does not include wchar_t. */
8840 || (bitfield
&& !flag_signed_bitfields
8842 /* A typedef for plain `int' without `signed' can be
8843 controlled just like plain `int', but a typedef for
8844 `signed int' cannot be so controlled. */
8846 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8847 && TREE_CODE (type
) == INTEGER_TYPE
8848 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8850 if (explicit_int128
)
8851 type
= int128_unsigned_type_node
;
8853 type
= long_long_unsigned_type_node
;
8855 type
= long_unsigned_type_node
;
8857 type
= short_unsigned_type_node
;
8858 else if (type
== char_type_node
)
8859 type
= unsigned_char_type_node
;
8860 else if (typedef_decl
)
8861 type
= unsigned_type_for (type
);
8863 type
= unsigned_type_node
;
8865 else if (signed_p
&& type
== char_type_node
)
8866 type
= signed_char_type_node
;
8867 else if (explicit_int128
)
8868 type
= int128_integer_type_node
;
8870 type
= long_long_integer_type_node
;
8872 type
= long_integer_type_node
;
8874 type
= short_integer_type_node
;
8876 if (declspecs
->specs
[(int)ds_complex
])
8878 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8879 error ("complex invalid for %qs", name
);
8880 /* If we just have "complex", it is equivalent to
8881 "complex double", but if any modifiers at all are specified it is
8882 the complex form of TYPE. E.g, "complex short" is
8883 "complex short int". */
8884 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8885 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8886 type
= complex_double_type_node
;
8887 else if (type
== integer_type_node
)
8888 type
= complex_integer_type_node
;
8889 else if (type
== float_type_node
)
8890 type
= complex_float_type_node
;
8891 else if (type
== double_type_node
)
8892 type
= complex_double_type_node
;
8893 else if (type
== long_double_type_node
)
8894 type
= complex_long_double_type_node
;
8896 type
= build_complex_type (type
);
8899 type_quals
= TYPE_UNQUALIFIED
;
8900 if (declspecs
->specs
[(int)ds_const
])
8901 type_quals
|= TYPE_QUAL_CONST
;
8902 if (declspecs
->specs
[(int)ds_volatile
])
8903 type_quals
|= TYPE_QUAL_VOLATILE
;
8904 if (declspecs
->specs
[(int)ds_restrict
])
8905 type_quals
|= TYPE_QUAL_RESTRICT
;
8906 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8907 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8910 type_quals
|= cp_type_quals (type
);
8911 type
= cp_build_qualified_type_real
8912 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8913 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8914 /* We might have ignored or rejected some of the qualifiers. */
8915 type_quals
= cp_type_quals (type
);
8918 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8919 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8920 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8922 storage_class
= declspecs
->storage_class
;
8923 if (storage_class
== sc_static
)
8924 staticp
= 1 + (decl_context
== FIELD
);
8926 if (virtualp
&& staticp
== 2)
8928 error ("member %qD cannot be declared both virtual and static", dname
);
8929 storage_class
= sc_none
;
8932 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8934 if (dependent_name
&& !friendp
)
8936 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8937 return error_mark_node
;
8940 /* Issue errors about use of storage classes for parameters. */
8941 if (decl_context
== PARM
)
8943 if (declspecs
->specs
[(int)ds_typedef
])
8945 error ("typedef declaration invalid in parameter declaration");
8946 return error_mark_node
;
8948 else if (template_parm_flag
&& storage_class
!= sc_none
)
8950 error ("storage class specified for template parameter %qs", name
);
8951 return error_mark_node
;
8953 else if (storage_class
== sc_static
8954 || storage_class
== sc_extern
8956 error ("storage class specifiers invalid in parameter declarations");
8958 /* Function parameters cannot be constexpr. If we saw one, moan
8959 and pretend it wasn't there. */
8962 error ("a parameter cannot be declared %<constexpr%>");
8967 /* Give error if `virtual' is used outside of class declaration. */
8969 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8971 error ("%<virtual%> outside class declaration");
8975 /* Static anonymous unions are dealt with here. */
8976 if (staticp
&& decl_context
== TYPENAME
8978 && ANON_AGGR_TYPE_P (declspecs
->type
))
8979 decl_context
= FIELD
;
8981 /* Warn about storage classes that are invalid for certain
8982 kinds of declarations (parameters, typenames, etc.). */
8985 && storage_class
!= sc_extern
8986 && storage_class
!= sc_static
)
8987 || declspecs
->specs
[(int)ds_typedef
]))
8989 error ("multiple storage classes in declaration of %qs", name
);
8992 if (decl_context
!= NORMAL
8993 && ((storage_class
!= sc_none
8994 && storage_class
!= sc_mutable
)
8997 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
8998 && (storage_class
== sc_register
8999 || storage_class
== sc_auto
))
9001 else if (declspecs
->specs
[(int)ds_typedef
])
9003 else if (decl_context
== FIELD
9004 /* C++ allows static class elements. */
9005 && storage_class
== sc_static
)
9006 /* C++ also allows inlines and signed and unsigned elements,
9007 but in those cases we don't come in here. */
9011 if (decl_context
== FIELD
)
9012 error ("storage class specified for %qs", name
);
9015 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9016 error ("storage class specified for parameter %qs", name
);
9018 error ("storage class specified for typename");
9020 if (storage_class
== sc_register
9021 || storage_class
== sc_auto
9022 || storage_class
== sc_extern
9024 storage_class
= sc_none
;
9027 else if (storage_class
== sc_extern
&& funcdef_flag
9028 && ! toplevel_bindings_p ())
9029 error ("nested function %qs declared %<extern%>", name
);
9030 else if (toplevel_bindings_p ())
9032 if (storage_class
== sc_auto
)
9033 error ("top-level declaration of %qs specifies %<auto%>", name
);
9036 && storage_class
!= sc_extern
9037 && storage_class
!= sc_static
)
9039 error ("function-scope %qs implicitly auto and declared %<__thread%>",
9044 if (storage_class
&& friendp
)
9046 error ("storage class specifiers invalid in friend function declarations");
9047 storage_class
= sc_none
;
9052 unqualified_id
= NULL_TREE
;
9055 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9056 switch (TREE_CODE (unqualified_id
))
9059 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9060 if (TYPE_P (unqualified_id
))
9061 unqualified_id
= constructor_name (unqualified_id
);
9064 case IDENTIFIER_NODE
:
9065 case TEMPLATE_ID_EXPR
:
9073 /* Determine the type of the entity declared by recurring on the
9075 for (; declarator
; declarator
= declarator
->declarator
)
9077 const cp_declarator
*inner_declarator
;
9080 if (type
== error_mark_node
)
9081 return error_mark_node
;
9083 attrs
= declarator
->attributes
;
9089 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9090 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9091 if (declarator
->kind
== cdk_function
)
9092 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9093 if (declarator
->kind
== cdk_array
)
9094 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9095 returned_attrs
= decl_attributes (&type
,
9096 chainon (returned_attrs
, attrs
),
9100 if (declarator
->kind
== cdk_id
)
9103 inner_declarator
= declarator
->declarator
;
9105 switch (declarator
->kind
)
9108 type
= create_array_type_for_decl (dname
, type
,
9109 declarator
->u
.array
.bounds
);
9117 /* Declaring a function type.
9118 Make sure we have a valid type for the function to return. */
9120 if (type_quals
!= TYPE_UNQUALIFIED
)
9122 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9123 warning (OPT_Wignored_qualifiers
,
9124 "type qualifiers ignored on function return type");
9125 /* We now know that the TYPE_QUALS don't apply to the
9126 decl, but to its return type. */
9127 type_quals
= TYPE_UNQUALIFIED
;
9129 errmsg
= targetm
.invalid_return_type (type
);
9133 type
= integer_type_node
;
9136 /* Error about some types functions can't return. */
9138 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9140 error ("%qs declared as function returning a function", name
);
9141 return error_mark_node
;
9143 if (TREE_CODE (type
) == ARRAY_TYPE
)
9145 error ("%qs declared as function returning an array", name
);
9146 return error_mark_node
;
9149 /* Pick up type qualifiers which should be applied to `this'. */
9150 memfn_quals
= declarator
->u
.function
.qualifiers
;
9151 /* Pick up virt-specifiers. */
9152 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9153 /* Pick up the exception specifications. */
9154 raises
= declarator
->u
.function
.exception_specification
;
9155 /* If the exception-specification is ill-formed, let's pretend
9156 there wasn't one. */
9157 if (raises
== error_mark_node
)
9160 /* Say it's a definition only for the CALL_EXPR
9161 closest to the identifier. */
9162 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9164 /* Handle a late-specified return type. */
9167 if (type_uses_auto (type
))
9169 if (!declarator
->u
.function
.late_return_type
)
9171 error ("%qs function uses %<auto%> type specifier without"
9172 " trailing return type", name
);
9173 return error_mark_node
;
9175 else if (!is_auto (type
))
9177 error ("%qs function with trailing return type has"
9178 " %qT as its type rather than plain %<auto%>",
9180 return error_mark_node
;
9183 else if (declarator
->u
.function
.late_return_type
)
9185 if (cxx_dialect
< cxx0x
)
9186 /* Not using maybe_warn_cpp0x because this should
9187 always be an error. */
9188 error ("trailing return type only available with "
9189 "-std=c++11 or -std=gnu++11");
9191 error ("%qs function with trailing return type not "
9192 "declared with %<auto%> type specifier", name
);
9193 return error_mark_node
;
9196 type
= splice_late_return_type
9197 (type
, declarator
->u
.function
.late_return_type
);
9198 if (type
== error_mark_node
)
9199 return error_mark_node
;
9201 if (ctype
== NULL_TREE
9202 && decl_context
== FIELD
9204 && (friendp
== 0 || dname
== current_class_name
))
9205 ctype
= current_class_type
;
9207 if (ctype
&& (sfk
== sfk_constructor
9208 || sfk
== sfk_destructor
))
9210 /* We are within a class's scope. If our declarator name
9211 is the same as the class name, and we are defining
9212 a function, then it is a constructor/destructor, and
9213 therefore returns a void type. */
9215 /* ISO C++ 12.4/2. A destructor may not be declared
9216 const or volatile. A destructor may not be
9219 ISO C++ 12.1. A constructor may not be declared
9220 const or volatile. A constructor may not be
9221 virtual. A constructor may not be static. */
9223 error ((flags
== DTOR_FLAG
)
9224 ? G_("destructor cannot be static member function")
9225 : G_("constructor cannot be static member function"));
9228 error ((flags
== DTOR_FLAG
)
9229 ? G_("destructors may not be cv-qualified")
9230 : G_("constructors may not be cv-qualified"));
9231 memfn_quals
= TYPE_UNQUALIFIED
;
9234 if (decl_context
== FIELD
9235 && !member_function_or_else (ctype
,
9238 return error_mark_node
;
9240 if (flags
!= DTOR_FLAG
)
9242 /* It's a constructor. */
9247 permerror (input_location
, "constructors cannot be declared virtual");
9250 if (decl_context
== FIELD
9251 && sfk
!= sfk_constructor
)
9252 return error_mark_node
;
9254 if (decl_context
== FIELD
)
9260 error ("can%'t initialize friend function %qs", name
);
9263 /* Cannot be both friend and virtual. */
9264 error ("virtual functions cannot be friends");
9267 if (decl_context
== NORMAL
)
9268 error ("friend declaration not in class definition");
9269 if (current_function_decl
&& funcdef_flag
)
9270 error ("can%'t define friend function %qs in a local "
9274 else if (ctype
&& sfk
== sfk_conversion
)
9278 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9283 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9286 if (inner_declarator
9287 && inner_declarator
->kind
== cdk_id
9288 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9289 && arg_types
!= void_list_node
)
9291 error ("destructors may not have parameters");
9292 arg_types
= void_list_node
;
9296 type
= build_function_type (type
, arg_types
);
9303 /* Filter out pointers-to-references and references-to-references.
9304 We can get these if a TYPE_DECL is used. */
9306 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9308 if (declarator
->kind
!= cdk_reference
)
9310 error ("cannot declare pointer to %q#T", type
);
9311 type
= TREE_TYPE (type
);
9314 /* In C++0x, we allow reference to reference declarations
9315 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9316 and template type arguments [14.3.1/4 temp.arg.type]. The
9317 check for direct reference to reference declarations, which
9318 are still forbidden, occurs below. Reasoning behind the change
9319 can be found in DR106, DR540, and the rvalue reference
9321 else if (cxx_dialect
== cxx98
)
9323 error ("cannot declare reference to %q#T", type
);
9324 type
= TREE_TYPE (type
);
9327 else if (VOID_TYPE_P (type
))
9329 if (declarator
->kind
== cdk_reference
)
9330 error ("cannot declare reference to %q#T", type
);
9331 else if (declarator
->kind
== cdk_ptrmem
)
9332 error ("cannot declare pointer to %q#T member", type
);
9335 /* We now know that the TYPE_QUALS don't apply to the decl,
9336 but to the target of the pointer. */
9337 type_quals
= TYPE_UNQUALIFIED
;
9339 if (declarator
->kind
== cdk_ptrmem
9340 && (TREE_CODE (type
) == FUNCTION_TYPE
9341 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9343 memfn_quals
|= type_memfn_quals (type
);
9344 type
= build_memfn_type (type
,
9345 declarator
->u
.pointer
.class_type
,
9347 if (type
== error_mark_node
)
9348 return error_mark_node
;
9349 memfn_quals
= TYPE_UNQUALIFIED
;
9352 if (TREE_CODE (type
) == FUNCTION_TYPE
9353 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9354 error (declarator
->kind
== cdk_reference
9355 ? G_("cannot declare reference to qualified function type %qT")
9356 : G_("cannot declare pointer to qualified function type %qT"),
9359 /* When the pointed-to type involves components of variable size,
9360 care must be taken to ensure that the size evaluation code is
9361 emitted early enough to dominate all the possible later uses
9362 and late enough for the variables on which it depends to have
9365 This is expected to happen automatically when the pointed-to
9366 type has a name/declaration of it's own, but special attention
9367 is required if the type is anonymous.
9369 We handle the NORMAL and FIELD contexts here by inserting a
9370 dummy statement that just evaluates the size at a safe point
9371 and ensures it is not deferred until e.g. within a deeper
9372 conditional context (c++/43555).
9374 We expect nothing to be needed here for PARM or TYPENAME.
9375 Evaluating the size at this point for TYPENAME would
9376 actually be incorrect, as we might be in the middle of an
9377 expression with side effects on the pointed-to type size
9378 "arguments" prior to the pointer declaration point and the
9379 size evaluation could end up prior to the side effects. */
9381 if (!TYPE_NAME (type
)
9382 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9383 && at_function_scope_p ()
9384 && variably_modified_type_p (type
, NULL_TREE
))
9386 /* First break out any side-effects. */
9387 stabilize_vla_size (TYPE_SIZE (type
));
9388 /* And then force evaluation of the SAVE_EXPR. */
9389 finish_expr_stmt (TYPE_SIZE (type
));
9392 if (declarator
->kind
== cdk_reference
)
9394 /* In C++0x, the type we are creating a reference to might be
9395 a typedef which is itself a reference type. In that case,
9396 we follow the reference collapsing rules in
9397 [7.1.3/8 dcl.typedef] to create the final reference type:
9399 "If a typedef TD names a type that is a reference to a type
9400 T, an attempt to create the type 'lvalue reference to cv TD'
9401 creates the type 'lvalue reference to T,' while an attempt
9402 to create the type "rvalue reference to cv TD' creates the
9405 if (VOID_TYPE_P (type
))
9406 /* We already gave an error. */;
9407 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9409 if (declarator
->u
.reference
.rvalue_ref
)
9410 /* Leave type alone. */;
9412 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9415 type
= cp_build_reference_type
9416 (type
, declarator
->u
.reference
.rvalue_ref
);
9418 /* In C++0x, we need this check for direct reference to
9419 reference declarations, which are forbidden by
9420 [8.3.2/5 dcl.ref]. Reference to reference declarations
9421 are only allowed indirectly through typedefs and template
9422 type arguments. Example:
9424 void foo(int & &); // invalid ref-to-ref decl
9426 typedef int & int_ref;
9427 void foo(int_ref &); // valid ref-to-ref decl
9429 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9430 error ("cannot declare reference to %q#T, which is not "
9431 "a typedef or a template type argument", type
);
9433 else if (TREE_CODE (type
) == METHOD_TYPE
)
9434 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9435 else if (declarator
->kind
== cdk_ptrmem
)
9437 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9439 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9440 /* We will already have complained. */
9441 type
= error_mark_node
;
9443 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9447 type
= build_pointer_type (type
);
9449 /* Process a list of type modifier keywords (such as
9450 const or volatile) that were given inside the `*' or `&'. */
9452 if (declarator
->u
.pointer
.qualifiers
)
9455 = cp_build_qualified_type (type
,
9456 declarator
->u
.pointer
.qualifiers
);
9457 type_quals
= cp_type_quals (type
);
9470 /* We need to stabilize side-effects in VLA sizes for regular array
9471 declarations too, not just pointers to arrays. */
9472 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9473 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9474 && at_function_scope_p ()
9475 && variably_modified_type_p (type
, NULL_TREE
))
9476 stabilize_vla_size (TYPE_SIZE (type
));
9478 /* A `constexpr' specifier used in an object declaration declares
9479 the object as `const'. */
9480 if (constexpr_p
&& innermost_code
!= cdk_function
)
9482 if (type_quals
& TYPE_QUAL_CONST
)
9483 error ("both %<const%> and %<constexpr%> cannot be used here");
9484 if (type_quals
& TYPE_QUAL_VOLATILE
)
9485 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9486 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9488 type_quals
|= TYPE_QUAL_CONST
;
9489 type
= cp_build_qualified_type (type
, type_quals
);
9493 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9494 && TREE_CODE (type
) != FUNCTION_TYPE
9495 && TREE_CODE (type
) != METHOD_TYPE
)
9497 error ("template-id %qD used as a declarator",
9499 unqualified_id
= dname
;
9502 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9503 qualified with a class-name, turn it into a METHOD_TYPE, unless
9504 we know that the function is static. We take advantage of this
9505 opportunity to do other processing that pertains to entities
9506 explicitly declared to be class members. Note that if DECLARATOR
9507 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9508 would not have exited the loop above. */
9510 && declarator
->u
.id
.qualifying_scope
9511 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9515 ctype
= declarator
->u
.id
.qualifying_scope
;
9516 ctype
= TYPE_MAIN_VARIANT (ctype
);
9518 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
9520 /* You're supposed to have one `template <...>' for every
9521 template class, but you don't need one for a full
9522 specialization. For example:
9524 template <class T> struct S{};
9525 template <> struct S<int> { void f(); };
9526 void S<int>::f () {}
9528 is correct; there shouldn't be a `template <>' for the
9529 definition of `S<int>::f'. */
9530 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
9531 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
9532 /* T is an explicit (not partial) specialization. All
9533 containing classes must therefore also be explicitly
9536 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
9537 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
9538 template_count
+= 1;
9540 t
= TYPE_MAIN_DECL (t
);
9541 t
= DECL_CONTEXT (t
);
9544 if (ctype
== current_class_type
)
9548 permerror (input_location
, "member functions are implicitly friends of their class");
9552 permerror (declarator
->id_loc
,
9553 "extra qualification %<%T::%> on member %qs",
9556 else if (/* If the qualifying type is already complete, then we
9557 can skip the following checks. */
9558 !COMPLETE_TYPE_P (ctype
)
9559 && (/* If the function is being defined, then
9560 qualifying type must certainly be complete. */
9562 /* A friend declaration of "T::f" is OK, even if
9563 "T" is a template parameter. But, if this
9564 function is not a friend, the qualifying type
9566 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9567 /* For a declaration, the type need not be
9568 complete, if either it is dependent (since there
9569 is no meaningful definition of complete in that
9570 case) or the qualifying class is currently being
9572 || !(dependent_type_p (ctype
)
9573 || currently_open_class (ctype
)))
9574 /* Check that the qualifying type is complete. */
9575 && !complete_type_or_else (ctype
, NULL_TREE
))
9576 return error_mark_node
;
9577 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9579 if (current_class_type
9580 && (!friendp
|| funcdef_flag
))
9583 ? G_("cannot define member function %<%T::%s%> "
9585 : G_("cannot declare member function %<%T::%s%> "
9587 ctype
, name
, current_class_type
);
9588 return error_mark_node
;
9591 else if (declspecs
->specs
[(int)ds_typedef
]
9592 && current_class_type
)
9594 error ("cannot declare member %<%T::%s%> within %qT",
9595 ctype
, name
, current_class_type
);
9596 return error_mark_node
;
9600 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9601 ctype
= current_class_type
;
9603 /* Now TYPE has the actual type. */
9608 *attrlist
= chainon (returned_attrs
, *attrlist
);
9610 attrlist
= &returned_attrs
;
9613 /* Handle parameter packs. */
9614 if (parameter_pack_p
)
9616 if (decl_context
== PARM
)
9617 /* Turn the type into a pack expansion.*/
9618 type
= make_pack_expansion (type
);
9620 error ("non-parameter %qs cannot be a parameter pack", name
);
9623 /* Did array size calculations overflow? */
9625 if (TREE_CODE (type
) == ARRAY_TYPE
9626 && COMPLETE_TYPE_P (type
)
9627 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9628 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
9630 error ("size of array %qs is too large", name
);
9631 /* If we proceed with the array type as it is, we'll eventually
9632 crash in tree_low_cst(). */
9633 type
= error_mark_node
;
9636 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9637 && !processing_template_decl
9638 && variably_modified_type_p (type
, NULL_TREE
))
9640 if (decl_context
== FIELD
)
9641 error ("data member may not have variably modified type %qT", type
);
9643 error ("parameter may not have variably modified type %qT", type
);
9644 type
= error_mark_node
;
9647 if (explicitp
== 1 || (explicitp
&& friendp
))
9649 /* [dcl.fct.spec] The explicit specifier shall only be used in
9650 declarations of constructors within a class definition. */
9651 error ("only declarations of constructors can be %<explicit%>");
9655 if (storage_class
== sc_mutable
)
9657 if (decl_context
!= FIELD
|| friendp
)
9659 error ("non-member %qs cannot be declared %<mutable%>", name
);
9660 storage_class
= sc_none
;
9662 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9664 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9665 storage_class
= sc_none
;
9667 else if (TREE_CODE (type
) == FUNCTION_TYPE
9668 || TREE_CODE (type
) == METHOD_TYPE
)
9670 error ("function %qs cannot be declared %<mutable%>", name
);
9671 storage_class
= sc_none
;
9675 error ("static %qs cannot be declared %<mutable%>", name
);
9676 storage_class
= sc_none
;
9678 else if (type_quals
& TYPE_QUAL_CONST
)
9680 error ("const %qs cannot be declared %<mutable%>", name
);
9681 storage_class
= sc_none
;
9683 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9685 permerror (input_location
, "reference %qs cannot be declared "
9686 "%<mutable%>", name
);
9687 storage_class
= sc_none
;
9691 /* If this is declaring a typedef name, return a TYPE_DECL. */
9692 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9696 /* Note that the grammar rejects storage classes
9697 in typenames, fields or parameters. */
9698 if (current_lang_name
== lang_name_java
)
9699 TYPE_FOR_JAVA (type
) = 1;
9701 /* This declaration:
9703 typedef void f(int) const;
9705 declares a function type which is not a member of any
9706 particular class, but which is cv-qualified; for
9707 example "f S::*" declares a pointer to a const-qualified
9708 member function of S. We record the cv-qualification in the
9710 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9712 type
= apply_memfn_quals (type
, memfn_quals
);
9714 /* We have now dealt with these qualifiers. */
9715 memfn_quals
= TYPE_UNQUALIFIED
;
9718 if (type_uses_auto (type
))
9720 error ("typedef declared %<auto%>");
9721 type
= error_mark_node
;
9724 if (decl_context
== FIELD
)
9725 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9727 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9728 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9729 error_at (DECL_SOURCE_LOCATION (decl
),
9730 "typedef name may not be a nested-name-specifier");
9731 TREE_TYPE (decl
) = error_mark_node
;
9734 if (decl_context
!= FIELD
)
9736 if (!current_function_decl
)
9737 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9738 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9739 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9740 (current_function_decl
)))
9741 /* The TYPE_DECL is "abstract" because there will be
9742 clones of this constructor/destructor, and there will
9743 be copies of this TYPE_DECL generated in those
9745 DECL_ABSTRACT (decl
) = 1;
9747 else if (constructor_name_p (unqualified_id
, current_class_type
))
9748 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9749 "as enclosing class",
9752 /* If the user declares "typedef struct {...} foo" then the
9753 struct will have an anonymous name. Fill that name in now.
9754 Nothing can refer to it, so nothing needs know about the name
9756 if (type
!= error_mark_node
9759 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9760 && TYPE_ANONYMOUS_P (type
)
9761 && declspecs
->type_definition_p
9762 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9766 /* Replace the anonymous name with the real name everywhere. */
9767 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9769 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9770 /* We do not rename the debug info representing the
9771 anonymous tagged type because the standard says in
9772 [dcl.typedef] that the naming applies only for
9773 linkage purposes. */
9774 /*debug_hooks->set_name (t, decl);*/
9775 TYPE_NAME (t
) = decl
;
9778 if (TYPE_LANG_SPECIFIC (type
))
9779 TYPE_WAS_ANONYMOUS (type
) = 1;
9781 /* If this is a typedef within a template class, the nested
9782 type is a (non-primary) template. The name for the
9783 template needs updating as well. */
9784 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9785 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9786 = TYPE_IDENTIFIER (type
);
9788 /* Adjust linkage now that we aren't anonymous anymore. */
9789 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9790 determine_visibility (TYPE_MAIN_DECL (type
));
9792 /* FIXME remangle member functions; member functions of a
9793 type with external linkage have external linkage. */
9797 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9798 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9800 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
9801 memfn_quals
!= TYPE_UNQUALIFIED
,
9802 inlinep
, friendp
, raises
!= NULL_TREE
);
9804 if (declspecs
->specs
[(int)ds_alias
])
9805 /* Acknowledge that this was written:
9806 `using analias = atype;'. */
9807 TYPE_DECL_ALIAS_P (decl
) = 1;
9812 /* Detect the case of an array type of unspecified size
9813 which came, as such, direct from a typedef name.
9814 We must copy the type, so that the array's domain can be
9815 individually set by the object's initializer. */
9817 if (type
&& typedef_type
9818 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9819 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9820 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9822 /* Detect where we're using a typedef of function type to declare a
9823 function. PARMS will not be set, so we must create it now. */
9825 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9827 tree decls
= NULL_TREE
;
9830 for (args
= TYPE_ARG_TYPES (type
);
9831 args
&& args
!= void_list_node
;
9832 args
= TREE_CHAIN (args
))
9834 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9836 DECL_CHAIN (decl
) = decls
;
9840 parms
= nreverse (decls
);
9842 if (decl_context
!= TYPENAME
)
9844 /* A cv-qualifier-seq shall only be part of the function type
9845 for a non-static member function. [8.3.5/4 dcl.fct] */
9846 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9847 && (current_class_type
== NULL_TREE
|| staticp
) )
9850 ? G_("qualified function types cannot be used to "
9851 "declare static member functions")
9852 : G_("qualified function types cannot be used to "
9853 "declare free functions"));
9854 type
= TYPE_MAIN_VARIANT (type
);
9857 /* The qualifiers on the function type become the qualifiers on
9858 the non-static member function. */
9859 memfn_quals
|= type_memfn_quals (type
);
9860 type_quals
= TYPE_UNQUALIFIED
;
9864 /* If this is a type name (such as, in a cast or sizeof),
9865 compute the type and return it now. */
9867 if (decl_context
== TYPENAME
)
9869 /* Note that the grammar rejects storage classes
9870 in typenames, fields or parameters. */
9871 if (type_quals
!= TYPE_UNQUALIFIED
)
9872 type_quals
= TYPE_UNQUALIFIED
;
9874 /* Special case: "friend class foo" looks like a TYPENAME context. */
9877 if (type_quals
!= TYPE_UNQUALIFIED
)
9879 error ("type qualifiers specified for friend class declaration");
9880 type_quals
= TYPE_UNQUALIFIED
;
9884 error ("%<inline%> specified for friend class declaration");
9890 /* Don't allow friend declaration without a class-key. */
9891 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9892 permerror (input_location
, "template parameters cannot be friends");
9893 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9894 permerror (input_location
, "friend declaration requires class-key, "
9895 "i.e. %<friend class %T::%D%>",
9896 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9898 permerror (input_location
, "friend declaration requires class-key, "
9899 "i.e. %<friend %#T%>",
9903 /* Only try to do this stuff if we didn't already give up. */
9904 if (type
!= integer_type_node
)
9906 /* A friendly class? */
9907 if (current_class_type
)
9908 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9911 error ("trying to make class %qT a friend of global scope",
9914 type
= void_type_node
;
9917 else if (memfn_quals
)
9919 if (ctype
== NULL_TREE
9920 && TREE_CODE (type
) == METHOD_TYPE
)
9921 ctype
= TYPE_METHOD_BASETYPE (type
);
9924 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9925 /* Core issue #547: need to allow this in template type args. */
9926 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9927 type
= apply_memfn_quals (type
, memfn_quals
);
9929 error ("invalid qualifiers on non-member function type");
9934 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9935 && decl_context
!= CATCHPARM
9936 && TREE_CODE (type
) != UNION_TYPE
9939 error ("abstract declarator %qT used as declaration", type
);
9940 return error_mark_node
;
9943 /* Only functions may be declared using an operator-function-id. */
9945 && IDENTIFIER_OPNAME_P (unqualified_id
)
9946 && TREE_CODE (type
) != FUNCTION_TYPE
9947 && TREE_CODE (type
) != METHOD_TYPE
)
9949 error ("declaration of %qD as non-function", unqualified_id
);
9950 return error_mark_node
;
9953 /* We don't check parameter types here because we can emit a better
9954 error message later. */
9955 if (decl_context
!= PARM
)
9957 type
= check_var_type (unqualified_id
, type
);
9958 if (type
== error_mark_node
)
9959 return error_mark_node
;
9962 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9963 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9965 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9967 if (ctype
|| in_namespace
)
9968 error ("cannot use %<::%> in parameter declaration");
9970 if (type_uses_auto (type
))
9972 error ("parameter declared %<auto%>");
9973 type
= error_mark_node
;
9976 /* A parameter declared as an array of T is really a pointer to T.
9977 One declared as a function is really a pointer to a function.
9978 One declared as a member is really a pointer to member. */
9980 if (TREE_CODE (type
) == ARRAY_TYPE
)
9982 /* Transfer const-ness of array into that of type pointed to. */
9983 type
= build_pointer_type (TREE_TYPE (type
));
9984 type_quals
= TYPE_UNQUALIFIED
;
9986 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9987 type
= build_pointer_type (type
);
9990 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
9991 && !NEW_DELETE_OPNAME_P (unqualified_id
))
9993 cp_cv_quals real_quals
= memfn_quals
;
9994 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
9995 real_quals
|= TYPE_QUAL_CONST
;
9996 type
= build_memfn_type (type
, ctype
, real_quals
);
10002 if (decl_context
== PARM
)
10004 decl
= cp_build_parm_decl (unqualified_id
, type
);
10006 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10007 memfn_quals
!= TYPE_UNQUALIFIED
,
10008 inlinep
, friendp
, raises
!= NULL_TREE
);
10010 else if (decl_context
== FIELD
)
10012 if (!staticp
&& type_uses_auto (type
))
10014 error ("non-static data member declared %<auto%>");
10015 type
= error_mark_node
;
10018 /* The C99 flexible array extension. */
10019 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10020 && TYPE_DOMAIN (type
) == NULL_TREE
)
10022 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10023 tf_warning_or_error
);
10024 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10027 if (type
== error_mark_node
)
10029 /* Happens when declaring arrays of sizes which
10030 are error_mark_node, for example. */
10033 else if (in_namespace
&& !friendp
)
10035 /* Something like struct S { int N::j; }; */
10036 error ("invalid use of %<::%>");
10037 return error_mark_node
;
10039 else if (TREE_CODE (type
) == FUNCTION_TYPE
10040 || TREE_CODE (type
) == METHOD_TYPE
)
10043 tree function_context
;
10047 /* This should never happen in pure C++ (the check
10048 could be an assert). It could happen in
10049 Objective-C++ if someone writes invalid code that
10050 uses a function declaration for an instance
10051 variable or property (instance variables and
10052 properties are parsed as FIELD_DECLs, but they are
10053 part of an Objective-C class, not a C++ class).
10054 That code is invalid and is caught by this
10058 error ("declaration of function %qD in invalid context",
10060 return error_mark_node
;
10063 /* ``A union may [ ... ] not [ have ] virtual functions.''
10065 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10067 error ("function %qD declared virtual inside a union",
10069 return error_mark_node
;
10072 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10076 error ("%qD cannot be declared virtual, since it "
10077 "is always static",
10084 /* Check that the name used for a destructor makes sense. */
10085 if (sfk
== sfk_destructor
)
10087 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10091 gcc_assert (friendp
);
10092 error ("expected qualified name in friend declaration "
10093 "for destructor %qD", uqname
);
10094 return error_mark_node
;
10097 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10099 error ("declaration of %qD as member of %qT",
10101 return error_mark_node
;
10105 error ("a destructor cannot be %<constexpr%>");
10106 return error_mark_node
;
10109 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10111 error ("expected qualified name in friend declaration "
10112 "for constructor %qD",
10113 id_declarator
->u
.id
.unqualified_name
);
10114 return error_mark_node
;
10117 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10118 function_context
= (ctype
!= NULL_TREE
) ?
10119 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10120 publicp
= (! friendp
|| ! staticp
)
10121 && function_context
== NULL_TREE
;
10122 decl
= grokfndecl (ctype
, type
,
10123 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10124 ? unqualified_id
: dname
,
10127 virtualp
, flags
, memfn_quals
, raises
,
10128 friendp
? -1 : 0, friendp
, publicp
,
10129 inlinep
| (2 * constexpr_p
),
10131 funcdef_flag
, template_count
, in_namespace
,
10132 attrlist
, declarator
->id_loc
);
10133 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10134 if (decl
== NULL_TREE
)
10135 return error_mark_node
;
10137 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10138 /* The decl and setting of decl_attr is also turned off. */
10139 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10142 /* [class.conv.ctor]
10144 A constructor declared without the function-specifier
10145 explicit that can be called with a single parameter
10146 specifies a conversion from the type of its first
10147 parameter to the type of its class. Such a constructor
10148 is called a converting constructor. */
10149 if (explicitp
== 2)
10150 DECL_NONCONVERTING_P (decl
) = 1;
10152 else if (!staticp
&& !dependent_type_p (type
)
10153 && !COMPLETE_TYPE_P (complete_type (type
))
10154 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10156 if (unqualified_id
)
10157 error ("field %qD has incomplete type", unqualified_id
);
10159 error ("name %qT has incomplete type", type
);
10161 /* If we're instantiating a template, tell them which
10162 instantiation made the field's type be incomplete. */
10163 if (current_class_type
10164 && TYPE_NAME (current_class_type
)
10165 && IDENTIFIER_TEMPLATE (current_class_name
)
10167 && declspecs
->type
== type
)
10168 error (" in instantiation of template %qT",
10169 current_class_type
);
10171 return error_mark_node
;
10177 error ("%qE is neither function nor member function; "
10178 "cannot be declared friend", unqualified_id
);
10186 /* Friends are treated specially. */
10187 if (ctype
== current_class_type
)
10188 ; /* We already issued a permerror. */
10189 else if (decl
&& DECL_NAME (decl
))
10191 if (template_class_depth (current_class_type
) == 0)
10193 decl
= check_explicit_specialization
10194 (unqualified_id
, decl
, template_count
,
10195 2 * funcdef_flag
+ 4);
10196 if (decl
== error_mark_node
)
10197 return error_mark_node
;
10200 decl
= do_friend (ctype
, unqualified_id
, decl
,
10206 return error_mark_node
;
10209 /* Structure field. It may not be a function, except for C++. */
10211 if (decl
== NULL_TREE
)
10215 /* C++ allows static class members. All other work
10216 for this is done by grokfield. */
10217 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
10218 set_linkage_for_static_data_member (decl
);
10219 /* Even if there is an in-class initialization, DECL
10220 is considered undefined until an out-of-class
10221 definition is provided. */
10222 DECL_EXTERNAL (decl
) = 1;
10225 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10227 if (constexpr_p
&& !initialized
)
10229 error ("constexpr static data member %qD must have an "
10230 "initializer", decl
);
10231 constexpr_p
= false;
10238 error ("non-static data member %qE declared %<constexpr%>",
10240 constexpr_p
= false;
10242 decl
= build_decl (input_location
,
10243 FIELD_DECL
, unqualified_id
, type
);
10244 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10245 if (bitfield
&& !unqualified_id
)
10246 TREE_NO_WARNING (decl
) = 1;
10248 if (storage_class
== sc_mutable
)
10250 DECL_MUTABLE_P (decl
) = 1;
10251 storage_class
= sc_none
;
10256 /* An attempt is being made to initialize a non-static
10257 member. This is new in C++11. */
10258 maybe_warn_cpp0x (CPP0X_NSDMI
);
10260 /* If this has been parsed with static storage class, but
10261 errors forced staticp to be cleared, ensure NSDMI is
10263 if (declspecs
->storage_class
== sc_static
)
10264 DECL_INITIAL (decl
) = error_mark_node
;
10268 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10269 memfn_quals
!= TYPE_UNQUALIFIED
,
10270 inlinep
, friendp
, raises
!= NULL_TREE
);
10273 else if (TREE_CODE (type
) == FUNCTION_TYPE
10274 || TREE_CODE (type
) == METHOD_TYPE
)
10276 tree original_name
;
10279 if (!unqualified_id
)
10280 return error_mark_node
;
10282 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10283 original_name
= dname
;
10285 original_name
= unqualified_id
;
10287 if (storage_class
== sc_auto
)
10288 error ("storage class %<auto%> invalid for function %qs", name
);
10289 else if (storage_class
== sc_register
)
10290 error ("storage class %<register%> invalid for function %qs", name
);
10292 error ("storage class %<__thread%> invalid for function %qs", name
);
10294 if (virt_specifiers
)
10295 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10296 /* Function declaration not at top level.
10297 Storage classes other than `extern' are not allowed
10298 and `extern' makes no difference. */
10299 if (! toplevel_bindings_p ()
10300 && (storage_class
== sc_static
10301 || declspecs
->specs
[(int)ds_inline
])
10304 if (storage_class
== sc_static
)
10305 pedwarn (input_location
, OPT_pedantic
,
10306 "%<static%> specified invalid for function %qs "
10307 "declared out of global scope", name
);
10309 pedwarn (input_location
, OPT_pedantic
,
10310 "%<inline%> specifier invalid for function %qs "
10311 "declared out of global scope", name
);
10314 if (ctype
== NULL_TREE
)
10318 error ("virtual non-class function %qs", name
);
10321 else if (sfk
== sfk_constructor
10322 || sfk
== sfk_destructor
)
10324 error (funcdef_flag
10325 ? G_("%qs defined in a non-class scope")
10326 : G_("%qs declared in a non-class scope"), name
);
10331 /* Record presence of `static'. */
10332 publicp
= (ctype
!= NULL_TREE
10333 || storage_class
== sc_extern
10334 || storage_class
!= sc_static
);
10336 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10337 virtualp
, flags
, memfn_quals
, raises
,
10339 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10341 template_count
, in_namespace
, attrlist
,
10342 declarator
->id_loc
);
10343 if (decl
== NULL_TREE
)
10344 return error_mark_node
;
10348 int invalid_static
= 0;
10350 /* Don't allow a static member function in a class, and forbid
10351 declaring main to be static. */
10352 if (TREE_CODE (type
) == METHOD_TYPE
)
10354 permerror (input_location
, "cannot declare member function %qD to have "
10355 "static linkage", decl
);
10356 invalid_static
= 1;
10358 else if (current_function_decl
)
10360 /* FIXME need arm citation */
10361 error ("cannot declare static function inside another function");
10362 invalid_static
= 1;
10365 if (invalid_static
)
10368 storage_class
= sc_none
;
10374 /* It's a variable. */
10376 /* An uninitialized decl with `extern' is a reference. */
10377 decl
= grokvardecl (type
, unqualified_id
,
10380 (type_quals
& TYPE_QUAL_CONST
) != 0,
10381 ctype
? ctype
: in_namespace
);
10382 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10383 memfn_quals
!= TYPE_UNQUALIFIED
,
10384 inlinep
, friendp
, raises
!= NULL_TREE
);
10388 DECL_CONTEXT (decl
) = ctype
;
10391 permerror (input_location
, "%<static%> may not be used when defining "
10392 "(as opposed to declaring) a static data member");
10394 storage_class
= sc_none
;
10396 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10398 error ("static member %qD declared %<register%>", decl
);
10399 storage_class
= sc_none
;
10401 if (storage_class
== sc_extern
&& pedantic
)
10403 pedwarn (input_location
, OPT_pedantic
,
10404 "cannot explicitly declare member %q#D to have "
10405 "extern linkage", decl
);
10406 storage_class
= sc_none
;
10409 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10411 error ("declaration of constexpr variable %qD is not a definition",
10413 constexpr_p
= false;
10417 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10419 if (toplevel_bindings_p ())
10421 /* It's common practice (and completely valid) to have a const
10422 be initialized and declared extern. */
10423 if (!(type_quals
& TYPE_QUAL_CONST
))
10424 warning (0, "%qs initialized and declared %<extern%>", name
);
10428 error ("%qs has both %<extern%> and initializer", name
);
10429 return error_mark_node
;
10433 /* Record `register' declaration for warnings on &
10434 and in case doing stupid register allocation. */
10436 if (storage_class
== sc_register
)
10437 DECL_REGISTER (decl
) = 1;
10438 else if (storage_class
== sc_extern
)
10439 DECL_THIS_EXTERN (decl
) = 1;
10440 else if (storage_class
== sc_static
)
10441 DECL_THIS_STATIC (decl
) = 1;
10443 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10444 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10445 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10447 /* Record constancy and volatility on the DECL itself . There's
10448 no need to do this when processing a template; we'll do this
10449 for the instantiated declaration based on the type of DECL. */
10450 if (!processing_template_decl
)
10451 cp_apply_type_quals_to_decl (type_quals
, decl
);
10457 /* Subroutine of start_function. Ensure that each of the parameter
10458 types (as listed in PARMS) is complete, as is required for a
10459 function definition. */
10462 require_complete_types_for_parms (tree parms
)
10464 for (; parms
; parms
= DECL_CHAIN (parms
))
10466 if (dependent_type_p (TREE_TYPE (parms
)))
10468 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10469 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10471 relayout_decl (parms
);
10472 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10475 /* grokparms or complete_type_or_else will have already issued
10477 TREE_TYPE (parms
) = error_mark_node
;
10481 /* Returns nonzero if T is a local variable. */
10484 local_variable_p (const_tree t
)
10486 if ((TREE_CODE (t
) == VAR_DECL
10487 /* A VAR_DECL with a context that is a _TYPE is a static data
10489 && !TYPE_P (CP_DECL_CONTEXT (t
))
10490 /* Any other non-local variable must be at namespace scope. */
10491 && !DECL_NAMESPACE_SCOPE_P (t
))
10492 || (TREE_CODE (t
) == PARM_DECL
))
10498 /* Like local_variable_p, but suitable for use as a tree-walking
10502 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10503 void *data ATTRIBUTE_UNUSED
)
10505 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
10507 else if (TYPE_P (*tp
))
10508 *walk_subtrees
= 0;
10514 /* Check that ARG, which is a default-argument expression for a
10515 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10516 something goes wrong. DECL may also be a _TYPE node, rather than a
10517 DECL, if there is no DECL available. */
10520 check_default_argument (tree decl
, tree arg
)
10525 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10526 /* We get a DEFAULT_ARG when looking at an in-class declaration
10527 with a default argument. Ignore the argument for now; we'll
10528 deal with it after the class is complete. */
10537 decl_type
= TREE_TYPE (decl
);
10539 if (arg
== error_mark_node
10540 || decl
== error_mark_node
10541 || TREE_TYPE (arg
) == error_mark_node
10542 || decl_type
== error_mark_node
)
10543 /* Something already went wrong. There's no need to check
10545 return error_mark_node
;
10547 /* [dcl.fct.default]
10549 A default argument expression is implicitly converted to the
10551 if (!TREE_TYPE (arg
)
10552 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
10555 error ("default argument for %q#D has type %qT",
10556 decl
, TREE_TYPE (arg
));
10558 error ("default argument for parameter of type %qT has type %qT",
10559 decl_type
, TREE_TYPE (arg
));
10561 return error_mark_node
;
10564 /* [dcl.fct.default]
10566 Local variables shall not be used in default argument
10569 The keyword `this' shall not be used in a default argument of a
10570 member function. */
10571 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10574 error ("default argument %qE uses local variable %qD", arg
, var
);
10575 return error_mark_node
;
10582 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10585 type_is_deprecated (tree type
)
10587 enum tree_code code
;
10588 if (TREE_DEPRECATED (type
))
10590 if (TYPE_NAME (type
)
10591 && TREE_DEPRECATED (TYPE_NAME (type
)))
10594 /* Do warn about using typedefs to a deprecated class. */
10595 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10596 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10598 code
= TREE_CODE (type
);
10600 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10601 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10602 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10603 return type_is_deprecated (TREE_TYPE (type
));
10605 if (TYPE_PTRMEMFUNC_P (type
))
10606 return type_is_deprecated
10607 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10612 /* Decode the list of parameter types for a function type.
10613 Given the list of things declared inside the parens,
10614 return a list of types.
10616 If this parameter does not end with an ellipsis, we append
10619 *PARMS is set to the chain of PARM_DECLs created. */
10622 grokparms (tree parmlist
, tree
*parms
)
10624 tree result
= NULL_TREE
;
10625 tree decls
= NULL_TREE
;
10629 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10631 tree type
= NULL_TREE
;
10632 tree init
= TREE_PURPOSE (parm
);
10633 tree decl
= TREE_VALUE (parm
);
10634 const char *errmsg
;
10636 if (parm
== void_list_node
)
10639 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10642 type
= TREE_TYPE (decl
);
10643 if (VOID_TYPE_P (type
))
10645 if (same_type_p (type
, void_type_node
)
10646 && DECL_SELF_REFERENCE_P (type
)
10647 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10648 /* this is a parmlist of `(void)', which is ok. */
10650 cxx_incomplete_type_error (decl
, type
);
10651 /* It's not a good idea to actually create parameters of
10652 type `void'; other parts of the compiler assume that a
10653 void type terminates the parameter list. */
10654 type
= error_mark_node
;
10655 TREE_TYPE (decl
) = error_mark_node
;
10658 if (type
!= error_mark_node
10659 && TYPE_FOR_JAVA (type
)
10660 && MAYBE_CLASS_TYPE_P (type
))
10662 error ("parameter %qD has Java class type", decl
);
10663 type
= error_mark_node
;
10664 TREE_TYPE (decl
) = error_mark_node
;
10668 if (type
!= error_mark_node
10669 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10672 type
= error_mark_node
;
10673 TREE_TYPE (decl
) = error_mark_node
;
10676 if (type
!= error_mark_node
)
10678 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10680 tree deptype
= type_is_deprecated (type
);
10682 warn_deprecated_use (deptype
, NULL_TREE
);
10685 /* Top-level qualifiers on the parameters are
10686 ignored for function types. */
10687 type
= cp_build_qualified_type (type
, 0);
10688 if (TREE_CODE (type
) == METHOD_TYPE
)
10690 error ("parameter %qD invalidly declared method type", decl
);
10691 type
= build_pointer_type (type
);
10692 TREE_TYPE (decl
) = type
;
10694 else if (abstract_virtuals_error (decl
, type
))
10695 any_error
= 1; /* Seems like a good idea. */
10696 else if (POINTER_TYPE_P (type
))
10698 /* [dcl.fct]/6, parameter types cannot contain pointers
10699 (references) to arrays of unknown bound. */
10700 tree t
= TREE_TYPE (type
);
10701 int ptr
= TYPE_PTR_P (type
);
10705 if (TYPE_PTR_P (t
))
10707 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10709 else if (!TYPE_DOMAIN (t
))
10713 if (TREE_CODE (t
) == ARRAY_TYPE
)
10715 ? G_("parameter %qD includes pointer to array of "
10716 "unknown bound %qT")
10717 : G_("parameter %qD includes reference to array of "
10718 "unknown bound %qT"),
10724 else if (init
&& !processing_template_decl
)
10725 init
= check_default_argument (decl
, init
);
10728 DECL_CHAIN (decl
) = decls
;
10730 result
= tree_cons (init
, type
, result
);
10732 decls
= nreverse (decls
);
10733 result
= nreverse (result
);
10735 result
= chainon (result
, void_list_node
);
10742 /* D is a constructor or overloaded `operator='.
10744 Let T be the class in which D is declared. Then, this function
10747 -1 if D's is an ill-formed constructor or copy assignment operator
10748 whose first parameter is of type `T'.
10749 0 if D is not a copy constructor or copy assignment
10751 1 if D is a copy constructor or copy assignment operator whose
10752 first parameter is a reference to non-const qualified T.
10753 2 if D is a copy constructor or copy assignment operator whose
10754 first parameter is a reference to const qualified T.
10756 This function can be used as a predicate. Positive values indicate
10757 a copy constructor and nonzero values indicate a copy assignment
10761 copy_fn_p (const_tree d
)
10767 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10769 if (TREE_CODE (d
) == TEMPLATE_DECL
10770 || (DECL_TEMPLATE_INFO (d
)
10771 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10772 /* Instantiations of template member functions are never copy
10773 functions. Note that member functions of templated classes are
10774 represented as template functions internally, and we must
10775 accept those as copy functions. */
10778 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10782 arg_type
= TREE_VALUE (args
);
10783 if (arg_type
== error_mark_node
)
10786 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10788 /* Pass by value copy assignment operator. */
10791 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10792 && !TYPE_REF_IS_RVALUE (arg_type
)
10793 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10795 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10801 args
= TREE_CHAIN (args
);
10803 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10804 /* There are more non-optional args. */
10810 /* D is a constructor or overloaded `operator='.
10812 Let T be the class in which D is declared. Then, this function
10813 returns true when D is a move constructor or move assignment
10814 operator, false otherwise. */
10817 move_fn_p (const_tree d
)
10821 bool result
= false;
10823 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10825 if (cxx_dialect
== cxx98
)
10826 /* There are no move constructors if we are in C++98 mode. */
10829 if (TREE_CODE (d
) == TEMPLATE_DECL
10830 || (DECL_TEMPLATE_INFO (d
)
10831 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10832 /* Instantiations of template member functions are never copy
10833 functions. Note that member functions of templated classes are
10834 represented as template functions internally, and we must
10835 accept those as copy functions. */
10838 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10842 arg_type
= TREE_VALUE (args
);
10843 if (arg_type
== error_mark_node
)
10846 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10847 && TYPE_REF_IS_RVALUE (arg_type
)
10848 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10852 args
= TREE_CHAIN (args
);
10854 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10855 /* There are more non-optional args. */
10861 /* Remember any special properties of member function DECL. */
10864 grok_special_member_properties (tree decl
)
10868 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10871 class_type
= DECL_CONTEXT (decl
);
10872 if (DECL_CONSTRUCTOR_P (decl
))
10874 int ctor
= copy_fn_p (decl
);
10876 if (!DECL_ARTIFICIAL (decl
))
10877 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10883 A non-template constructor for class X is a copy
10884 constructor if its first parameter is of type X&, const
10885 X&, volatile X& or const volatile X&, and either there
10886 are no other parameters or else all other parameters have
10887 default arguments. */
10888 TYPE_HAS_COPY_CTOR (class_type
) = 1;
10889 if (user_provided_p (decl
))
10890 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
10892 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
10894 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10896 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10897 if (user_provided_p (decl
))
10898 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10900 else if (move_fn_p (decl
) && user_provided_p (decl
))
10901 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
10902 else if (is_list_ctor (decl
))
10903 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10905 if (DECL_DECLARED_CONSTEXPR_P (decl
)
10906 && !copy_fn_p (decl
) && !move_fn_p (decl
))
10907 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
10909 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10913 A non-template assignment operator for class X is a copy
10914 assignment operator if its parameter is of type X, X&, const
10915 X&, volatile X& or const volatile X&. */
10917 int assop
= copy_fn_p (decl
);
10921 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
10922 if (user_provided_p (decl
))
10923 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
10925 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
10927 else if (move_fn_p (decl
) && user_provided_p (decl
))
10928 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
10930 /* Destructors are handled in check_methods. */
10933 /* Check a constructor DECL has the correct form. Complains
10934 if the class has a constructor of the form X(X). */
10937 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10939 int ctor_parm
= copy_fn_p (decl
);
10945 A declaration of a constructor for a class X is ill-formed if
10946 its first parameter is of type (optionally cv-qualified) X
10947 and either there are no other parameters or else all other
10948 parameters have default arguments.
10950 We *don't* complain about member template instantiations that
10951 have this form, though; they can occur as we try to decide
10952 what constructor to use during overload resolution. Since
10953 overload resolution will never prefer such a constructor to
10954 the non-template copy constructor (which is either explicitly
10955 or implicitly defined), there's no need to worry about their
10956 existence. Theoretically, they should never even be
10957 instantiated, but that's hard to forestall. */
10958 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10966 /* An operator with this code is unary, but can also be binary. */
10969 ambi_op_p (enum tree_code code
)
10971 return (code
== INDIRECT_REF
10972 || code
== ADDR_EXPR
10973 || code
== UNARY_PLUS_EXPR
10974 || code
== NEGATE_EXPR
10975 || code
== PREINCREMENT_EXPR
10976 || code
== PREDECREMENT_EXPR
);
10979 /* An operator with this name can only be unary. */
10982 unary_op_p (enum tree_code code
)
10984 return (code
== TRUTH_NOT_EXPR
10985 || code
== BIT_NOT_EXPR
10986 || code
== COMPONENT_REF
10987 || code
== TYPE_EXPR
);
10990 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10991 errors are issued for invalid declarations. */
10994 grok_op_properties (tree decl
, bool complain
)
10996 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
10998 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
10999 tree name
= DECL_NAME (decl
);
11000 enum tree_code operator_code
;
11005 /* Count the number of arguments and check for ellipsis. */
11006 for (argtype
= argtypes
, arity
= 0;
11007 argtype
&& argtype
!= void_list_node
;
11008 argtype
= TREE_CHAIN (argtype
))
11010 ellipsis_p
= !argtype
;
11012 class_type
= DECL_CONTEXT (decl
);
11013 if (class_type
&& !CLASS_TYPE_P (class_type
))
11014 class_type
= NULL_TREE
;
11016 if (DECL_CONV_FN_P (decl
))
11017 operator_code
= TYPE_EXPR
;
11021 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11022 if (ansi_opname (CODE) == name) \
11024 operator_code = (CODE); \
11027 else if (ansi_assopname (CODE) == name) \
11029 operator_code = (CODE); \
11030 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11034 #include "operators.def"
11035 #undef DEF_OPERATOR
11037 gcc_unreachable ();
11040 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11041 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11044 switch (operator_code
)
11047 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11051 TYPE_GETS_DELETE (class_type
) |= 1;
11055 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11058 case VEC_DELETE_EXPR
:
11059 TYPE_GETS_DELETE (class_type
) |= 2;
11066 /* [basic.std.dynamic.allocation]/1:
11068 A program is ill-formed if an allocation function is declared
11069 in a namespace scope other than global scope or declared static
11072 The same also holds true for deallocation functions. */
11073 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11074 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11076 if (DECL_NAMESPACE_SCOPE_P (decl
))
11078 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11080 error ("%qD may not be declared within a namespace", decl
);
11083 else if (!TREE_PUBLIC (decl
))
11085 error ("%qD may not be declared as static", decl
);
11091 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11093 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11094 DECL_IS_OPERATOR_NEW (decl
) = 1;
11096 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11097 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11100 /* An operator function must either be a non-static member function
11101 or have at least one parameter of a class, a reference to a class,
11102 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11103 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11105 if (operator_code
== TYPE_EXPR
11106 || operator_code
== CALL_EXPR
11107 || operator_code
== COMPONENT_REF
11108 || operator_code
== ARRAY_REF
11109 || operator_code
== NOP_EXPR
)
11111 error ("%qD must be a nonstatic member function", decl
);
11118 if (DECL_STATIC_FUNCTION_P (decl
))
11120 error ("%qD must be either a non-static member "
11121 "function or a non-member function", decl
);
11125 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11127 tree arg
= non_reference (TREE_VALUE (p
));
11128 if (arg
== error_mark_node
)
11131 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11132 because these checks are performed even on
11133 template functions. */
11134 if (MAYBE_CLASS_TYPE_P (arg
)
11135 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11139 if (!p
|| p
== void_list_node
)
11142 error ("%qD must have an argument of class or "
11143 "enumerated type", decl
);
11149 /* There are no restrictions on the arguments to an overloaded
11151 if (operator_code
== CALL_EXPR
)
11154 /* Warn about conversion operators that will never be used. */
11155 if (IDENTIFIER_TYPENAME_P (name
)
11156 && ! DECL_TEMPLATE_INFO (decl
)
11158 /* Warn only declaring the function; there is no need to
11159 warn again about out-of-class definitions. */
11160 && class_type
== current_class_type
)
11162 tree t
= TREE_TYPE (name
);
11163 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11166 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11168 if (TREE_CODE (t
) == VOID_TYPE
)
11169 warning (OPT_Wconversion
,
11171 ? G_("conversion to a reference to void "
11172 "will never use a type conversion operator")
11173 : G_("conversion to void "
11174 "will never use a type conversion operator"));
11175 else if (class_type
)
11177 if (t
== class_type
)
11178 warning (OPT_Wconversion
,
11180 ? G_("conversion to a reference to the same type "
11181 "will never use a type conversion operator")
11182 : G_("conversion to the same type "
11183 "will never use a type conversion operator"));
11184 /* Don't force t to be complete here. */
11185 else if (MAYBE_CLASS_TYPE_P (t
)
11186 && COMPLETE_TYPE_P (t
)
11187 && DERIVED_FROM_P (t
, class_type
))
11188 warning (OPT_Wconversion
,
11190 ? G_("conversion to a reference to a base class "
11191 "will never use a type conversion operator")
11192 : G_("conversion to a base class "
11193 "will never use a type conversion operator"));
11198 if (operator_code
== COND_EXPR
)
11201 error ("ISO C++ prohibits overloading operator ?:");
11204 else if (ellipsis_p
)
11206 error ("%qD must not have variable number of arguments", decl
);
11209 else if (ambi_op_p (operator_code
))
11212 /* We pick the one-argument operator codes by default, so
11213 we don't have to change anything. */
11215 else if (arity
== 2)
11217 /* If we thought this was a unary operator, we now know
11218 it to be a binary operator. */
11219 switch (operator_code
)
11222 operator_code
= MULT_EXPR
;
11226 operator_code
= BIT_AND_EXPR
;
11229 case UNARY_PLUS_EXPR
:
11230 operator_code
= PLUS_EXPR
;
11234 operator_code
= MINUS_EXPR
;
11237 case PREINCREMENT_EXPR
:
11238 operator_code
= POSTINCREMENT_EXPR
;
11241 case PREDECREMENT_EXPR
:
11242 operator_code
= POSTDECREMENT_EXPR
;
11246 gcc_unreachable ();
11249 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11251 if ((operator_code
== POSTINCREMENT_EXPR
11252 || operator_code
== POSTDECREMENT_EXPR
)
11253 && ! processing_template_decl
11254 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11257 error ("postfix %qD must take %<int%> as its argument",
11260 error ("postfix %qD must take %<int%> as its second "
11268 error ("%qD must take either zero or one argument", decl
);
11270 error ("%qD must take either one or two arguments", decl
);
11274 /* More Effective C++ rule 6. */
11276 && (operator_code
== POSTINCREMENT_EXPR
11277 || operator_code
== POSTDECREMENT_EXPR
11278 || operator_code
== PREINCREMENT_EXPR
11279 || operator_code
== PREDECREMENT_EXPR
))
11281 tree arg
= TREE_VALUE (argtypes
);
11282 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11283 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11284 arg
= TREE_TYPE (arg
);
11285 arg
= TYPE_MAIN_VARIANT (arg
);
11286 if (operator_code
== PREINCREMENT_EXPR
11287 || operator_code
== PREDECREMENT_EXPR
)
11289 if (TREE_CODE (ret
) != REFERENCE_TYPE
11290 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11292 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11293 build_reference_type (arg
));
11297 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11298 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11302 else if (unary_op_p (operator_code
))
11307 error ("%qD must take %<void%>", decl
);
11309 error ("%qD must take exactly one argument", decl
);
11313 else /* if (binary_op_p (operator_code)) */
11318 error ("%qD must take exactly one argument", decl
);
11320 error ("%qD must take exactly two arguments", decl
);
11324 /* More Effective C++ rule 7. */
11326 && (operator_code
== TRUTH_ANDIF_EXPR
11327 || operator_code
== TRUTH_ORIF_EXPR
11328 || operator_code
== COMPOUND_EXPR
))
11329 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11333 /* Effective C++ rule 23. */
11336 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11337 && (operator_code
== PLUS_EXPR
11338 || operator_code
== MINUS_EXPR
11339 || operator_code
== TRUNC_DIV_EXPR
11340 || operator_code
== MULT_EXPR
11341 || operator_code
== TRUNC_MOD_EXPR
)
11342 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11343 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11345 /* [over.oper]/8 */
11346 for (; argtypes
&& argtypes
!= void_list_node
;
11347 argtypes
= TREE_CHAIN (argtypes
))
11348 if (TREE_PURPOSE (argtypes
))
11350 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11351 if (operator_code
== POSTINCREMENT_EXPR
11352 || operator_code
== POSTDECREMENT_EXPR
)
11354 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
11359 error ("%qD cannot have default arguments", decl
);
11367 /* Return a string giving the keyword associate with CODE. */
11369 static const char *
11370 tag_name (enum tag_types code
)
11382 case typename_type
:
11385 gcc_unreachable ();
11389 /* Name lookup in an elaborated-type-specifier (after the keyword
11390 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11391 elaborated-type-specifier is invalid, issue a diagnostic and return
11392 error_mark_node; otherwise, return the *_TYPE to which it referred.
11393 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11396 check_elaborated_type_specifier (enum tag_types tag_code
,
11398 bool allow_template_p
)
11402 if (decl
== error_mark_node
)
11403 return error_mark_node
;
11407 struct S { struct S *p; };
11409 name lookup will find the TYPE_DECL for the implicit "S::S"
11410 typedef. Adjust for that here. */
11411 if (DECL_SELF_REFERENCE_P (decl
))
11412 decl
= TYPE_NAME (TREE_TYPE (decl
));
11414 type
= TREE_TYPE (decl
);
11416 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11417 is false for this case as well. */
11418 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11420 error ("using template type parameter %qT after %qs",
11421 type
, tag_name (tag_code
));
11422 return error_mark_node
;
11424 /* Accept bound template template parameters. */
11425 else if (allow_template_p
11426 && TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
)
11430 If the identifier resolves to a typedef-name or the
11431 simple-template-id resolves to an alias template
11432 specialization, the elaborated-type-specifier is ill-formed.
11434 In other words, the only legitimate declaration to use in the
11435 elaborated type specifier is the implicit typedef created when
11436 the type is declared. */
11437 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11438 && !DECL_SELF_REFERENCE_P (decl
)
11439 && tag_code
!= typename_type
)
11441 if (alias_template_specialization_p (type
))
11442 error ("using alias template specialization %qT after %qs",
11443 type
, tag_name (tag_code
));
11445 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11446 inform (DECL_SOURCE_LOCATION (decl
),
11447 "%qD has a previous declaration here", decl
);
11448 return error_mark_node
;
11450 else if (TREE_CODE (type
) != RECORD_TYPE
11451 && TREE_CODE (type
) != UNION_TYPE
11452 && tag_code
!= enum_type
11453 && tag_code
!= typename_type
)
11455 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11456 error ("%q+T has a previous declaration here", type
);
11457 return error_mark_node
;
11459 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11460 && tag_code
== enum_type
)
11462 error ("%qT referred to as enum", type
);
11463 error ("%q+T has a previous declaration here", type
);
11464 return error_mark_node
;
11466 else if (!allow_template_p
11467 && TREE_CODE (type
) == RECORD_TYPE
11468 && CLASSTYPE_IS_TEMPLATE (type
))
11470 /* If a class template appears as elaborated type specifier
11471 without a template header such as:
11473 template <class T> class C {};
11474 void f(class C); // No template header here
11476 then the required template argument is missing. */
11477 error ("template argument required for %<%s %T%>",
11478 tag_name (tag_code
),
11479 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11480 return error_mark_node
;
11486 /* Lookup NAME in elaborate type specifier in scope according to
11487 SCOPE and issue diagnostics if necessary.
11488 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11489 found, and ERROR_MARK_NODE for type error. */
11492 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11493 tag_scope scope
, bool template_header_p
)
11497 if (scope
== ts_global
)
11499 /* First try ordinary name lookup, ignoring hidden class name
11500 injected via friend declaration. */
11501 decl
= lookup_name_prefer_type (name
, 2);
11502 /* If that fails, the name will be placed in the smallest
11503 non-class, non-function-prototype scope according to 3.3.1/5.
11504 We may already have a hidden name declared as friend in this
11505 scope. So lookup again but not ignoring hidden names.
11506 If we find one, that name will be made visible rather than
11507 creating a new tag. */
11509 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11512 decl
= lookup_type_scope (name
, scope
);
11514 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
11515 decl
= DECL_TEMPLATE_RESULT (decl
);
11517 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11519 /* Look for invalid nested type:
11523 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11525 error ("%qD has the same name as the class in which it is "
11528 return error_mark_node
;
11531 /* Two cases we need to consider when deciding if a class
11532 template is allowed as an elaborated type specifier:
11533 1. It is a self reference to its own class.
11534 2. It comes with a template header.
11538 template <class T> class C {
11539 class C *c1; // DECL_SELF_REFERENCE_P is true
11542 template <class U> class C; // template_header_p is true
11543 template <class T> class C<T>::D {
11544 class C *c2; // DECL_SELF_REFERENCE_P is true
11547 t
= check_elaborated_type_specifier (tag_code
,
11550 | DECL_SELF_REFERENCE_P (decl
));
11553 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11555 error ("reference to %qD is ambiguous", name
);
11556 print_candidates (decl
);
11557 return error_mark_node
;
11563 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11564 Define the tag as a forward-reference if it is not defined.
11566 If a declaration is given, process it here, and report an error if
11567 multiple declarations are not identical.
11569 SCOPE is TS_CURRENT when this is also a definition. Only look in
11570 the current frame for the name (since C++ allows new names in any
11571 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11572 declaration. Only look beginning from the current scope outward up
11573 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11575 TEMPLATE_HEADER_P is true when this declaration is preceded by
11576 a set of template parameters. */
11579 xref_tag_1 (enum tag_types tag_code
, tree name
,
11580 tag_scope scope
, bool template_header_p
)
11582 enum tree_code code
;
11584 tree context
= NULL_TREE
;
11586 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11592 code
= RECORD_TYPE
;
11598 code
= ENUMERAL_TYPE
;
11601 gcc_unreachable ();
11604 /* In case of anonymous name, xref_tag is only called to
11605 make type node and push name. Name lookup is not required. */
11606 if (ANON_AGGRNAME_P (name
))
11609 t
= lookup_and_check_tag (tag_code
, name
,
11610 scope
, template_header_p
);
11612 if (t
== error_mark_node
)
11613 return error_mark_node
;
11615 if (scope
!= ts_current
&& t
&& current_class_type
11616 && template_class_depth (current_class_type
)
11617 && template_header_p
)
11619 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11620 definition of this tag. Since, in addition, we are currently
11621 processing a (member) template declaration of a template
11622 class, we must be very careful; consider:
11629 { template <class V>
11630 friend struct S1; };
11632 Here, the S2::S1 declaration should not be confused with the
11633 outer declaration. In particular, the inner version should
11634 have a template parameter of level 2, not level 1. This
11635 would be particularly important if the member declaration
11638 template <class V = U> friend struct S1;
11640 say, when we should tsubst into `U' when instantiating
11641 S2. On the other hand, when presented with:
11651 we must find the inner binding eventually. We
11652 accomplish this by making sure that the new type we
11653 create to represent this declaration has the right
11655 context
= TYPE_CONTEXT (t
);
11661 /* If no such tag is yet defined, create a forward-reference node
11662 and record it as the "definition".
11663 When a real declaration of this type is found,
11664 the forward-reference will be altered into a real type. */
11665 if (code
== ENUMERAL_TYPE
)
11667 error ("use of enum %q#D without previous declaration", name
);
11668 return error_mark_node
;
11672 t
= make_class_type (code
);
11673 TYPE_CONTEXT (t
) = context
;
11674 t
= pushtag (name
, t
, scope
);
11679 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11681 if (!redeclare_class_template (t
, current_template_parms
))
11682 return error_mark_node
;
11684 else if (!processing_template_decl
11685 && CLASS_TYPE_P (t
)
11686 && CLASSTYPE_IS_TEMPLATE (t
))
11688 error ("redeclaration of %qT as a non-template", t
);
11689 error ("previous declaration %q+D", t
);
11690 return error_mark_node
;
11693 /* Make injected friend class visible. */
11694 if (scope
!= ts_within_enclosing_non_class
11695 && hidden_name_p (TYPE_NAME (t
)))
11697 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11698 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11700 if (TYPE_TEMPLATE_INFO (t
))
11702 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11703 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11711 /* Wrapper for xref_tag_1. */
11714 xref_tag (enum tag_types tag_code
, tree name
,
11715 tag_scope scope
, bool template_header_p
)
11719 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
11720 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
11721 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
11727 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11729 enum tag_types tag_kind
;
11731 if (TREE_CODE (old
) == RECORD_TYPE
)
11732 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11734 tag_kind
= union_type
;
11736 if (id
== NULL_TREE
)
11737 id
= TYPE_IDENTIFIER (old
);
11739 return xref_tag (tag_kind
, id
, scope
, false);
11742 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11743 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11744 access_* node, and the TREE_VALUE is the type of the base-class.
11745 Non-NULL TREE_TYPE indicates virtual inheritance.
11747 Returns true if the binfo hierarchy was successfully created,
11748 false if an error was detected. */
11751 xref_basetypes (tree ref
, tree base_list
)
11754 tree binfo
, base_binfo
;
11755 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11756 unsigned max_bases
= 0; /* Maximum direct bases. */
11758 tree default_access
;
11759 tree igo_prev
; /* Track Inheritance Graph Order. */
11761 if (ref
== error_mark_node
)
11764 /* The base of a derived class is private by default, all others are
11766 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11767 && CLASSTYPE_DECLARED_CLASS (ref
)
11768 ? access_private_node
: access_public_node
);
11770 /* First, make sure that any templates in base-classes are
11771 instantiated. This ensures that if we call ourselves recursively
11772 we do not get confused about which classes are marked and which
11774 basep
= &base_list
;
11777 tree basetype
= TREE_VALUE (*basep
);
11779 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11780 && !complete_type_or_else (basetype
, NULL
))
11781 /* An incomplete type. Remove it from the list. */
11782 *basep
= TREE_CHAIN (*basep
);
11786 if (TREE_TYPE (*basep
))
11788 if (CLASS_TYPE_P (basetype
))
11789 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11790 basep
= &TREE_CHAIN (*basep
);
11794 TYPE_MARKED_P (ref
) = 1;
11796 /* The binfo slot should be empty, unless this is an (ill-formed)
11798 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11800 error ("redefinition of %q#T", ref
);
11804 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11806 binfo
= make_tree_binfo (max_bases
);
11808 TYPE_BINFO (ref
) = binfo
;
11809 BINFO_OFFSET (binfo
) = size_zero_node
;
11810 BINFO_TYPE (binfo
) = ref
;
11812 /* Apply base-class info set up to the variants of this type. */
11813 fixup_type_variants (ref
);
11817 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11818 /* An aggregate cannot have baseclasses. */
11819 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11821 if (TREE_CODE (ref
) == UNION_TYPE
)
11823 error ("derived union %qT invalid", ref
);
11830 if (TYPE_FOR_JAVA (ref
))
11832 error ("Java class %qT cannot have multiple bases", ref
);
11839 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11841 if (TYPE_FOR_JAVA (ref
))
11843 error ("Java class %qT cannot have virtual bases", ref
);
11848 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11850 tree access
= TREE_PURPOSE (base_list
);
11851 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11852 tree basetype
= TREE_VALUE (base_list
);
11854 if (access
== access_default_node
)
11855 access
= default_access
;
11857 if (PACK_EXPANSION_P (basetype
))
11858 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11859 if (TREE_CODE (basetype
) == TYPE_DECL
)
11860 basetype
= TREE_TYPE (basetype
);
11861 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11863 error ("base type %qT fails to be a struct or class type",
11868 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11869 TYPE_FOR_JAVA (ref
) = 1;
11871 base_binfo
= NULL_TREE
;
11872 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
11874 base_binfo
= TYPE_BINFO (basetype
);
11875 /* The original basetype could have been a typedef'd type. */
11876 basetype
= BINFO_TYPE (base_binfo
);
11878 /* Inherit flags from the base. */
11879 TYPE_HAS_NEW_OPERATOR (ref
)
11880 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11881 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11882 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11883 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11884 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11885 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11886 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11887 CLASSTYPE_REPEATED_BASE_P (ref
)
11888 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11891 /* We must do this test after we've seen through a typedef
11893 if (TYPE_MARKED_P (basetype
))
11895 if (basetype
== ref
)
11896 error ("recursive type %qT undefined", basetype
);
11898 error ("duplicate base type %qT invalid", basetype
);
11902 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11903 /* Regenerate the pack expansion for the bases. */
11904 basetype
= make_pack_expansion (basetype
);
11906 TYPE_MARKED_P (basetype
) = 1;
11908 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11909 &igo_prev
, via_virtual
);
11910 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11911 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11913 BINFO_BASE_APPEND (binfo
, base_binfo
);
11914 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11917 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
11918 /* If we have space in the vbase vector, we must have shared at
11919 least one of them, and are therefore diamond shaped. */
11920 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11922 /* Unmark all the types. */
11923 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11924 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11925 TYPE_MARKED_P (ref
) = 0;
11927 /* Now see if we have a repeated base type. */
11928 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11930 for (base_binfo
= binfo
; base_binfo
;
11931 base_binfo
= TREE_CHAIN (base_binfo
))
11933 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11935 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11938 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11940 for (base_binfo
= binfo
; base_binfo
;
11941 base_binfo
= TREE_CHAIN (base_binfo
))
11942 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11943 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11952 /* Copies the enum-related properties from type SRC to type DST.
11953 Used with the underlying type of an enum and the enum itself. */
11955 copy_type_enum (tree dst
, tree src
)
11958 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
11960 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
11961 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
11962 TYPE_SIZE (t
) = TYPE_SIZE (src
);
11963 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
11964 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
11965 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
11966 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
11967 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
11968 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
11972 /* Begin compiling the definition of an enumeration type.
11975 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11977 UNDERLYING_TYPE is the type that will be used as the storage for
11978 the enumeration type. This should be NULL_TREE if no storage type
11981 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11983 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11985 Returns the type object, as yet incomplete.
11986 Also records info about it so that build_enumerator
11987 may be used to declare the individual values as they are read. */
11990 start_enum (tree name
, tree enumtype
, tree underlying_type
,
11991 bool scoped_enum_p
, bool *is_new
)
11993 tree prevtype
= NULL_TREE
;
11994 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11998 /* [C++0x dcl.enum]p5:
12000 If not explicitly specified, the underlying type of a scoped
12001 enumeration type is int. */
12002 if (!underlying_type
&& scoped_enum_p
)
12003 underlying_type
= integer_type_node
;
12005 if (underlying_type
)
12006 underlying_type
= cv_unqualified (underlying_type
);
12008 /* If this is the real definition for a previous forward reference,
12009 fill in the contents in the same object that used to be the
12010 forward reference. */
12012 enumtype
= lookup_and_check_tag (enum_type
, name
,
12013 /*tag_scope=*/ts_current
,
12014 /*template_header_p=*/false);
12016 /* In case of a template_decl, the only check that should be deferred
12017 to instantiation time is the comparison of underlying types. */
12018 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12020 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12022 error_at (input_location
, "scoped/unscoped mismatch "
12023 "in enum %q#T", enumtype
);
12024 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12025 "previous definition here");
12026 enumtype
= error_mark_node
;
12028 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12030 error_at (input_location
, "underlying type mismatch "
12031 "in enum %q#T", enumtype
);
12032 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12033 "previous definition here");
12034 enumtype
= error_mark_node
;
12036 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12037 && !dependent_type_p (underlying_type
)
12038 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12039 && !same_type_p (underlying_type
,
12040 ENUM_UNDERLYING_TYPE (enumtype
)))
12042 error_at (input_location
, "different underlying type "
12043 "in enum %q#T", enumtype
);
12044 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12045 "previous definition here");
12046 underlying_type
= NULL_TREE
;
12050 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12051 || processing_template_decl
)
12053 /* In case of error, make a dummy enum to allow parsing to
12055 if (enumtype
== error_mark_node
)
12057 name
= make_anon_name ();
12058 enumtype
= NULL_TREE
;
12061 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12062 of an opaque enum, or an opaque enum of an already defined
12063 enumeration (C++0x only).
12064 In any other case, it'll be NULL_TREE. */
12070 prevtype
= enumtype
;
12072 /* Do not push the decl more than once, unless we need to
12073 compare underlying types at instantiation time */
12075 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12076 || (underlying_type
12077 && dependent_type_p (underlying_type
))
12078 || (ENUM_UNDERLYING_TYPE (enumtype
)
12079 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12081 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12082 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12085 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12088 if (enumtype
== error_mark_node
)
12089 return error_mark_node
;
12091 /* The enum is considered opaque until the opening '{' of the
12092 enumerator list. */
12093 SET_OPAQUE_ENUM_P (enumtype
, true);
12094 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12097 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12099 if (underlying_type
)
12101 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12103 copy_type_enum (enumtype
, underlying_type
);
12104 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12106 else if (dependent_type_p (underlying_type
))
12107 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12109 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12110 underlying_type
, enumtype
);
12113 /* If into a template class, the returned enum is always the first
12114 declaration (opaque or not) seen. This way all the references to
12115 this type will be to the same declaration. The following ones are used
12116 only to check for definition errors. */
12117 if (prevtype
&& processing_template_decl
)
12123 /* After processing and defining all the values of an enumeration type,
12124 install their decls in the enumeration type.
12125 ENUMTYPE is the type object. */
12128 finish_enum_value_list (tree enumtype
)
12131 tree underlying_type
;
12134 tree minnode
, maxnode
;
12137 bool fixed_underlying_type_p
12138 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12140 /* We built up the VALUES in reverse order. */
12141 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12143 /* For an enum defined in a template, just set the type of the values;
12144 all further processing is postponed until the template is
12145 instantiated. We need to set the type so that tsubst of a CONST_DECL
12147 if (processing_template_decl
)
12149 for (values
= TYPE_VALUES (enumtype
);
12151 values
= TREE_CHAIN (values
))
12152 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12156 /* Determine the minimum and maximum values of the enumerators. */
12157 if (TYPE_VALUES (enumtype
))
12159 minnode
= maxnode
= NULL_TREE
;
12161 for (values
= TYPE_VALUES (enumtype
);
12163 values
= TREE_CHAIN (values
))
12165 decl
= TREE_VALUE (values
);
12167 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12168 each enumerator has the type of its enumeration. Prior to the
12169 closing brace, the type of each enumerator is the type of its
12170 initializing value. */
12171 TREE_TYPE (decl
) = enumtype
;
12173 /* Update the minimum and maximum values, if appropriate. */
12174 value
= DECL_INITIAL (decl
);
12175 if (value
== error_mark_node
)
12176 value
= integer_zero_node
;
12177 /* Figure out what the minimum and maximum values of the
12178 enumerators are. */
12180 minnode
= maxnode
= value
;
12181 else if (tree_int_cst_lt (maxnode
, value
))
12183 else if (tree_int_cst_lt (value
, minnode
))
12190 If the enumerator-list is empty, the underlying type is as if
12191 the enumeration had a single enumerator with value 0. */
12192 minnode
= maxnode
= integer_zero_node
;
12194 if (!fixed_underlying_type_p
)
12196 /* Compute the number of bits require to represent all values of the
12197 enumeration. We must do this before the type of MINNODE and
12198 MAXNODE are transformed, since tree_int_cst_min_precision relies
12199 on the TREE_TYPE of the value it is passed. */
12200 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12201 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12202 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12203 int precision
= MAX (lowprec
, highprec
);
12205 bool use_short_enum
;
12207 /* Determine the underlying type of the enumeration.
12211 The underlying type of an enumeration is an integral type that
12212 can represent all the enumerator values defined in the
12213 enumeration. It is implementation-defined which integral type is
12214 used as the underlying type for an enumeration except that the
12215 underlying type shall not be larger than int unless the value of
12216 an enumerator cannot fit in an int or unsigned int.
12218 We use "int" or an "unsigned int" as the underlying type, even if
12219 a smaller integral type would work, unless the user has
12220 explicitly requested that we use the smallest possible type. The
12221 user can request that for all enumerations with a command line
12222 flag, or for just one enumeration with an attribute. */
12224 use_short_enum
= flag_short_enums
12225 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12227 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12231 underlying_type
= integer_types
[itk
];
12232 if (underlying_type
!= NULL_TREE
12233 && TYPE_PRECISION (underlying_type
) >= precision
12234 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12237 if (itk
== itk_none
)
12241 IF no integral type can represent all the enumerator values, the
12242 enumeration is ill-formed. */
12243 error ("no integral type can represent all of the enumerator values "
12244 "for %qT", enumtype
);
12245 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12246 underlying_type
= integer_types
[itk_unsigned_long_long
];
12251 The value of sizeof() applied to an enumeration type, an object
12252 of an enumeration type, or an enumerator, is the value of sizeof()
12253 applied to the underlying type. */
12254 copy_type_enum (enumtype
, underlying_type
);
12256 /* Compute the minimum and maximum values for the type.
12260 For an enumeration where emin is the smallest enumerator and emax
12261 is the largest, the values of the enumeration are the values of the
12262 underlying type in the range bmin to bmax, where bmin and bmax are,
12263 respectively, the smallest and largest values of the smallest bit-
12264 field that can store emin and emax. */
12266 /* The middle-end currently assumes that types with TYPE_PRECISION
12267 narrower than their underlying type are suitably zero or sign
12268 extended to fill their mode. Similarly, it assumes that the front
12269 end assures that a value of a particular type must be within
12270 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12272 We used to set these fields based on bmin and bmax, but that led
12273 to invalid assumptions like optimizing away bounds checking. So
12274 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12275 TYPE_MAX_VALUE to the values for the mode above and only restrict
12276 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12277 ENUM_UNDERLYING_TYPE (enumtype
)
12278 = build_distinct_type_copy (underlying_type
);
12279 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12280 set_min_and_max_values_for_integral_type
12281 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12283 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12284 if (flag_strict_enums
)
12285 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12289 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12291 /* Convert each of the enumerators to the type of the underlying
12292 type of the enumeration. */
12293 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12295 location_t saved_location
;
12297 decl
= TREE_VALUE (values
);
12298 saved_location
= input_location
;
12299 input_location
= DECL_SOURCE_LOCATION (decl
);
12300 if (fixed_underlying_type_p
)
12301 /* If the enumeration type has a fixed underlying type, we
12302 already checked all of the enumerator values. */
12303 value
= DECL_INITIAL (decl
);
12305 value
= perform_implicit_conversion (underlying_type
,
12306 DECL_INITIAL (decl
),
12307 tf_warning_or_error
);
12308 input_location
= saved_location
;
12310 /* Do not clobber shared ints. */
12311 value
= copy_node (value
);
12313 TREE_TYPE (value
) = enumtype
;
12314 DECL_INITIAL (decl
) = value
;
12317 /* Fix up all variant types of this enum type. */
12318 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12319 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12321 /* Finish debugging output for this type. */
12322 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12325 /* Finishes the enum type. This is called only the first time an
12326 enumeration is seen, be it opaque or odinary.
12327 ENUMTYPE is the type object. */
12330 finish_enum (tree enumtype
)
12332 if (processing_template_decl
)
12334 if (at_function_scope_p ())
12335 add_stmt (build_min (TAG_DEFN
, enumtype
));
12339 /* If this is a forward declaration, there should not be any variants,
12340 though we can get a variant in the middle of an enum-specifier with
12341 wacky code like 'enum E { e = sizeof(const E*) };' */
12342 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12343 && (TYPE_VALUES (enumtype
)
12344 || !TYPE_NEXT_VARIANT (enumtype
)));
12347 /* Build and install a CONST_DECL for an enumeration constant of the
12348 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12349 LOC is the location of NAME.
12350 Assignment of sequential values by default is handled here. */
12353 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12359 /* If the VALUE was erroneous, pretend it wasn't there; that will
12360 result in the enum being assigned the next value in sequence. */
12361 if (value
== error_mark_node
)
12364 /* Remove no-op casts from the value. */
12366 STRIP_TYPE_NOPS (value
);
12368 if (! processing_template_decl
)
12370 /* Validate and default VALUE. */
12371 if (value
!= NULL_TREE
)
12373 value
= cxx_constant_value (value
);
12375 if (TREE_CODE (value
) != INTEGER_CST
12376 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12378 error ("enumerator value for %qD is not an integer constant",
12384 /* Default based on previous value. */
12385 if (value
== NULL_TREE
)
12387 if (TYPE_VALUES (enumtype
))
12390 unsigned HOST_WIDE_INT lo
;
12394 /* C++03 7.2/4: If no initializer is specified for the first
12395 enumerator, the type is an unspecified integral
12396 type. Otherwise the type is the same as the type of the
12397 initializing value of the preceding enumerator unless the
12398 incremented value is not representable in that type, in
12399 which case the type is an unspecified integral type
12400 sufficient to contain the incremented value. */
12401 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12402 if (error_operand_p (prev_value
))
12403 value
= error_mark_node
;
12406 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
12407 TREE_INT_CST_HIGH (prev_value
),
12412 tree type
= TREE_TYPE (prev_value
);
12413 bool pos
= (TYPE_UNSIGNED (type
) || hi
>= 0);
12414 di
.low
= lo
; di
.high
= hi
;
12415 if (!double_int_fits_to_tree_p (type
, di
))
12418 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12420 type
= integer_types
[itk
];
12421 if (type
!= NULL_TREE
12422 && (pos
|| !TYPE_UNSIGNED (type
))
12423 && double_int_fits_to_tree_p (type
, di
))
12426 if (type
&& cxx_dialect
< cxx0x
12427 && itk
> itk_unsigned_long
)
12428 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12429 incremented enumerator value is too large for %<unsigned long%>" : "\
12430 incremented enumerator value is too large for %<long%>");
12432 if (type
== NULL_TREE
)
12435 value
= double_int_to_tree (type
, di
);
12440 error ("overflow in enumeration values at %qD", name
);
12441 value
= error_mark_node
;
12446 value
= integer_zero_node
;
12449 /* Remove no-op casts from the value. */
12450 STRIP_TYPE_NOPS (value
);
12452 /* If the underlying type of the enum is fixed, check whether
12453 the enumerator values fits in the underlying type. If it
12454 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12455 if (ENUM_UNDERLYING_TYPE (enumtype
)
12457 && TREE_CODE (value
) == INTEGER_CST
12458 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12460 error ("enumerator value %E is too large for underlying type %<%T%>",
12461 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12463 /* Silently convert the value so that we can continue. */
12464 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12469 /* C++ associates enums with global, function, or class declarations. */
12470 context
= current_scope ();
12472 /* Build the actual enumeration constant. Note that the enumeration
12473 constants have the underlying type of the enum (if it is fixed)
12474 or the type of their initializer (if the underlying type of the
12475 enum is not fixed):
12479 If the underlying type is fixed, the type of each enumerator
12480 prior to the closing brace is the underlying type; if the
12481 initializing value of an enumerator cannot be represented by
12482 the underlying type, the program is ill-formed. If the
12483 underlying type is not fixed, the type of each enumerator is
12484 the type of its initializing value.
12486 If the underlying type is not fixed, it will be computed by
12487 finish_enum and we will reset the type of this enumerator. Of
12488 course, if we're processing a template, there may be no value. */
12489 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12491 if (context
&& context
== current_class_type
)
12492 /* This enum declaration is local to the class. We need the full
12493 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12494 decl
= build_lang_decl_loc (loc
, CONST_DECL
, name
, type
);
12496 /* It's a global enum, or it's local to a function. (Note local to
12497 a function could mean local to a class method. */
12498 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12500 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12501 TREE_CONSTANT (decl
) = 1;
12502 TREE_READONLY (decl
) = 1;
12503 DECL_INITIAL (decl
) = value
;
12505 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12506 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12507 on the TYPE_FIELDS list for `S'. (That's so that you can say
12508 things like `S::i' later.) */
12509 finish_member_declaration (decl
);
12513 /* Add this enumeration constant to the list for this type. */
12514 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12517 /* Look for an enumerator with the given NAME within the enumeration
12518 type ENUMTYPE. This routine is used primarily for qualified name
12519 lookup into an enumerator in C++0x, e.g.,
12521 enum class Color { Red, Green, Blue };
12523 Color color = Color::Red;
12525 Returns the value corresponding to the enumerator, or
12526 NULL_TREE if no such enumerator was found. */
12528 lookup_enumerator (tree enumtype
, tree name
)
12531 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12533 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12534 return e
? TREE_VALUE (e
) : NULL_TREE
;
12538 /* We're defining DECL. Make sure that its type is OK. */
12541 check_function_type (tree decl
, tree current_function_parms
)
12543 tree fntype
= TREE_TYPE (decl
);
12544 tree return_type
= complete_type (TREE_TYPE (fntype
));
12546 /* In a function definition, arg types must be complete. */
12547 require_complete_types_for_parms (current_function_parms
);
12549 if (dependent_type_p (return_type
))
12551 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12552 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12554 tree args
= TYPE_ARG_TYPES (fntype
);
12556 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12557 error ("return type %q#T is incomplete", return_type
);
12559 error ("return type has Java class type %q#T", return_type
);
12561 /* Make it return void instead. */
12562 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12563 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12565 TREE_CHAIN (args
));
12567 fntype
= build_function_type (void_type_node
, args
);
12569 = build_exception_variant (fntype
,
12570 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12571 fntype
= (cp_build_type_attribute_variant
12572 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12573 TREE_TYPE (decl
) = fntype
;
12576 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12579 /* Create the FUNCTION_DECL for a function definition.
12580 DECLSPECS and DECLARATOR are the parts of the declaration;
12581 they describe the function's name and the type it returns,
12582 but twisted together in a fashion that parallels the syntax of C.
12584 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12585 DECLARATOR is really the DECL for the function we are about to
12586 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12587 indicating that the function is an inline defined in-class.
12589 This function creates a binding context for the function body
12590 as well as setting up the FUNCTION_DECL in current_function_decl.
12592 For C++, we must first check whether that datum makes any sense.
12593 For example, "class A local_a(1,2);" means that variable local_a
12594 is an aggregate of type A, which should have a constructor
12595 applied to it with the argument list [1, 2].
12597 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12598 or may be a BLOCK if the function has been defined previously
12599 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12600 error_mark_node if the function has never been defined, or
12601 a BLOCK if the function has been defined somewhere. */
12604 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12606 tree ctype
= NULL_TREE
;
12609 int doing_friend
= 0;
12610 cp_binding_level
*bl
;
12611 tree current_function_parms
;
12612 struct c_fileinfo
*finfo
12613 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12614 bool honor_interface
;
12616 /* Sanity check. */
12617 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12618 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12620 fntype
= TREE_TYPE (decl1
);
12621 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12622 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12624 /* ISO C++ 11.4/5. A friend function defined in a class is in
12625 the (lexical) scope of the class in which it is defined. */
12626 if (!ctype
&& DECL_FRIEND_P (decl1
))
12628 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12630 /* CTYPE could be null here if we're dealing with a template;
12631 for example, `inline friend float foo()' inside a template
12632 will have no CTYPE set. */
12633 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12639 if (DECL_DECLARED_INLINE_P (decl1
)
12640 && lookup_attribute ("noinline", attrs
))
12641 warning (0, "inline function %q+D given attribute noinline", decl1
);
12643 /* Handle gnu_inline attribute. */
12644 if (GNU_INLINE_P (decl1
))
12646 DECL_EXTERNAL (decl1
) = 1;
12647 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12648 DECL_INTERFACE_KNOWN (decl1
) = 1;
12649 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12652 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12653 /* This is a constructor, we must ensure that any default args
12654 introduced by this definition are propagated to the clones
12655 now. The clones are used directly in overload resolution. */
12656 adjust_clone_args (decl1
);
12658 /* Sometimes we don't notice that a function is a static member, and
12659 build a METHOD_TYPE for it. Fix that up now. */
12660 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12661 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12663 /* Set up current_class_type, and enter the scope of the class, if
12666 push_nested_class (ctype
);
12667 else if (DECL_STATIC_FUNCTION_P (decl1
))
12668 push_nested_class (DECL_CONTEXT (decl1
));
12670 /* Now that we have entered the scope of the class, we must restore
12671 the bindings for any template parameters surrounding DECL1, if it
12672 is an inline member template. (Order is important; consider the
12673 case where a template parameter has the same name as a field of
12674 the class.) It is not until after this point that
12675 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12676 if (flags
& SF_INCLASS_INLINE
)
12677 maybe_begin_member_template_processing (decl1
);
12679 /* Effective C++ rule 15. */
12681 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12682 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12683 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
12685 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12686 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12687 if (!DECL_INITIAL (decl1
))
12688 DECL_INITIAL (decl1
) = error_mark_node
;
12690 /* This function exists in static storage.
12691 (This does not mean `static' in the C sense!) */
12692 TREE_STATIC (decl1
) = 1;
12694 /* We must call push_template_decl after current_class_type is set
12695 up. (If we are processing inline definitions after exiting a
12696 class scope, current_class_type will be NULL_TREE until set above
12697 by push_nested_class.) */
12698 if (processing_template_decl
)
12700 /* FIXME: Handle error_mark_node more gracefully. */
12701 tree newdecl1
= push_template_decl (decl1
);
12702 if (newdecl1
!= error_mark_node
)
12706 /* We are now in the scope of the function being defined. */
12707 current_function_decl
= decl1
;
12709 /* Save the parm names or decls from this function's declarator
12710 where store_parm_decls will find them. */
12711 current_function_parms
= DECL_ARGUMENTS (decl1
);
12713 /* Make sure the parameter and return types are reasonable. When
12714 you declare a function, these types can be incomplete, but they
12715 must be complete when you define the function. */
12716 check_function_type (decl1
, current_function_parms
);
12718 /* Build the return declaration for the function. */
12719 restype
= TREE_TYPE (fntype
);
12720 if (DECL_RESULT (decl1
) == NULL_TREE
)
12724 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
12725 DECL_ARTIFICIAL (resdecl
) = 1;
12726 DECL_IGNORED_P (resdecl
) = 1;
12727 DECL_RESULT (decl1
) = resdecl
;
12729 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
12732 /* Let the user know we're compiling this function. */
12733 announce_function (decl1
);
12735 /* Record the decl so that the function name is defined.
12736 If we already have a decl for this name, and it is a FUNCTION_DECL,
12737 use the old decl. */
12738 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12740 /* A specialization is not used to guide overload resolution. */
12741 if (!DECL_FUNCTION_MEMBER_P (decl1
)
12742 && !(DECL_USE_TEMPLATE (decl1
) &&
12743 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
12745 tree olddecl
= pushdecl (decl1
);
12747 if (olddecl
== error_mark_node
)
12748 /* If something went wrong when registering the declaration,
12749 use DECL1; we have to have a FUNCTION_DECL to use when
12750 parsing the body of the function. */
12754 /* Otherwise, OLDDECL is either a previous declaration
12755 of the same function or DECL1 itself. */
12757 if (warn_missing_declarations
12758 && olddecl
== decl1
12759 && !DECL_MAIN_P (decl1
)
12760 && TREE_PUBLIC (decl1
)
12761 && !DECL_DECLARED_INLINE_P (decl1
))
12765 /* Check whether DECL1 is in an anonymous
12767 for (context
= DECL_CONTEXT (decl1
);
12769 context
= DECL_CONTEXT (context
))
12771 if (TREE_CODE (context
) == NAMESPACE_DECL
12772 && DECL_NAME (context
) == NULL_TREE
)
12776 if (context
== NULL
)
12777 warning (OPT_Wmissing_declarations
,
12778 "no previous declaration for %q+D", decl1
);
12786 /* We need to set the DECL_CONTEXT. */
12787 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12788 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12790 fntype
= TREE_TYPE (decl1
);
12792 /* If #pragma weak applies, mark the decl appropriately now.
12793 The pragma only applies to global functions. Because
12794 determining whether or not the #pragma applies involves
12795 computing the mangled name for the declaration, we cannot
12796 apply the pragma until after we have merged this declaration
12797 with any previous declarations; if the original declaration
12798 has a linkage specification, that specification applies to
12799 the definition as well, and may affect the mangled name. */
12800 if (DECL_FILE_SCOPE_P (decl1
))
12801 maybe_apply_pragma_weak (decl1
);
12804 /* Reset this in case the call to pushdecl changed it. */
12805 current_function_decl
= decl1
;
12807 gcc_assert (DECL_INITIAL (decl1
));
12809 /* This function may already have been parsed, in which case just
12810 return; our caller will skip over the body without parsing. */
12811 if (DECL_INITIAL (decl1
) != error_mark_node
)
12814 /* Initialize RTL machinery. We cannot do this until
12815 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12816 even when processing a template; this is how we get
12817 CFUN set up, and our per-function variables initialized.
12818 FIXME factor out the non-RTL stuff. */
12819 bl
= current_binding_level
;
12820 allocate_struct_function (decl1
, processing_template_decl
);
12822 /* Initialize the language data structures. Whenever we start
12823 a new function, we destroy temporaries in the usual way. */
12824 cfun
->language
= ggc_alloc_cleared_language_function ();
12825 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12826 current_binding_level
= bl
;
12828 /* Start the statement-tree, start the tree now. */
12829 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12831 /* If we are (erroneously) defining a function that we have already
12832 defined before, wipe out what we knew before. */
12833 if (!DECL_PENDING_INLINE_P (decl1
))
12834 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12836 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12838 /* We know that this was set up by `grokclassfn'. We do not
12839 wait until `store_parm_decls', since evil parse errors may
12840 never get us to that point. Here we keep the consistency
12841 between `current_class_type' and `current_class_ptr'. */
12842 tree t
= DECL_ARGUMENTS (decl1
);
12844 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12845 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12847 cp_function_chain
->x_current_class_ref
12848 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12849 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12850 cp_function_chain
->x_current_class_ptr
= t
;
12852 /* Constructors and destructors need to know whether they're "in
12853 charge" of initializing virtual base classes. */
12854 t
= DECL_CHAIN (t
);
12855 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12857 current_in_charge_parm
= t
;
12858 t
= DECL_CHAIN (t
);
12860 if (DECL_HAS_VTT_PARM_P (decl1
))
12862 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12863 current_vtt_parm
= t
;
12867 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12868 /* Implicitly-defined methods (like the
12869 destructor for a class in which no destructor
12870 is explicitly declared) must not be defined
12871 until their definition is needed. So, we
12872 ignore interface specifications for
12873 compiler-generated functions. */
12874 && !DECL_ARTIFICIAL (decl1
));
12876 if (processing_template_decl
)
12877 /* Don't mess with interface flags. */;
12878 else if (DECL_INTERFACE_KNOWN (decl1
))
12880 tree ctx
= decl_function_context (decl1
);
12882 if (DECL_NOT_REALLY_EXTERN (decl1
))
12883 DECL_EXTERNAL (decl1
) = 0;
12885 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12886 && TREE_PUBLIC (ctx
))
12887 /* This is a function in a local class in an extern inline
12889 comdat_linkage (decl1
);
12891 /* If this function belongs to an interface, it is public.
12892 If it belongs to someone else's interface, it is also external.
12893 This only affects inlines and template instantiations. */
12894 else if (!finfo
->interface_unknown
&& honor_interface
)
12896 if (DECL_DECLARED_INLINE_P (decl1
)
12897 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12899 DECL_EXTERNAL (decl1
)
12900 = (finfo
->interface_only
12901 || (DECL_DECLARED_INLINE_P (decl1
)
12902 && ! flag_implement_inlines
12903 && !DECL_VINDEX (decl1
)));
12905 /* For WIN32 we also want to put these in linkonce sections. */
12906 maybe_make_one_only (decl1
);
12909 DECL_EXTERNAL (decl1
) = 0;
12910 DECL_INTERFACE_KNOWN (decl1
) = 1;
12911 /* If this function is in an interface implemented in this file,
12912 make sure that the back end knows to emit this function
12914 if (!DECL_EXTERNAL (decl1
))
12915 mark_needed (decl1
);
12917 else if (finfo
->interface_unknown
&& finfo
->interface_only
12918 && honor_interface
)
12920 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12921 interface, we will have both finfo->interface_unknown and
12922 finfo->interface_only set. In that case, we don't want to
12923 use the normal heuristics because someone will supply a
12924 #pragma implementation elsewhere, and deducing it here would
12925 produce a conflict. */
12926 comdat_linkage (decl1
);
12927 DECL_EXTERNAL (decl1
) = 0;
12928 DECL_INTERFACE_KNOWN (decl1
) = 1;
12929 DECL_DEFER_OUTPUT (decl1
) = 1;
12933 /* This is a definition, not a reference.
12934 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12935 if (!GNU_INLINE_P (decl1
))
12936 DECL_EXTERNAL (decl1
) = 0;
12938 if ((DECL_DECLARED_INLINE_P (decl1
)
12939 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12940 && ! DECL_INTERFACE_KNOWN (decl1
))
12941 DECL_DEFER_OUTPUT (decl1
) = 1;
12943 DECL_INTERFACE_KNOWN (decl1
) = 1;
12946 /* Determine the ELF visibility attribute for the function. We must not
12947 do this before calling "pushdecl", as we must allow "duplicate_decls"
12948 to merge any attributes appropriately. We also need to wait until
12950 if (!DECL_CLONED_FUNCTION_P (decl1
))
12951 determine_visibility (decl1
);
12953 begin_scope (sk_function_parms
, decl1
);
12957 if (DECL_DESTRUCTOR_P (decl1
)
12958 || (DECL_CONSTRUCTOR_P (decl1
)
12959 && targetm
.cxx
.cdtor_returns_this ()))
12961 cdtor_label
= build_decl (input_location
,
12962 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12963 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12966 start_fname_decls ();
12968 store_parm_decls (current_function_parms
);
12972 /* Like start_preparsed_function, except that instead of a
12973 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12975 Returns 1 on success. If the DECLARATOR is not suitable for a function
12976 (it defines a datum instead), we return 0, which tells
12977 yyparse to report a parse error. */
12980 start_function (cp_decl_specifier_seq
*declspecs
,
12981 const cp_declarator
*declarator
,
12986 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
12987 if (decl1
== error_mark_node
)
12989 /* If the declarator is not suitable for a function definition,
12990 cause a syntax error. */
12991 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
12993 error ("invalid function declaration");
12997 if (DECL_MAIN_P (decl1
))
12998 /* main must return int. grokfndecl should have corrected it
12999 (and issued a diagnostic) if the user got it wrong. */
13000 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13001 integer_type_node
));
13003 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13008 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13012 use_eh_spec_block (tree fn
)
13014 return (flag_exceptions
&& flag_enforce_eh_specs
13015 && !processing_template_decl
13016 && !type_throw_all_p (TREE_TYPE (fn
))
13017 /* We insert the EH_SPEC_BLOCK only in the original
13018 function; then, it is copied automatically to the
13020 && !DECL_CLONED_FUNCTION_P (fn
)
13021 /* Implicitly-generated constructors and destructors have
13022 exception specifications. However, those specifications
13023 are the union of the possible exceptions specified by the
13024 constructors/destructors for bases and members, so no
13025 unallowed exception will ever reach this function. By
13026 not creating the EH_SPEC_BLOCK we save a little memory,
13027 and we avoid spurious warnings about unreachable
13029 && !DECL_DEFAULTED_FN (fn
));
13032 /* Store the parameter declarations into the current function declaration.
13033 This is called after parsing the parameter declarations, before
13034 digesting the body of the function.
13036 Also install to binding contour return value identifier, if any. */
13039 store_parm_decls (tree current_function_parms
)
13041 tree fndecl
= current_function_decl
;
13044 /* This is a chain of any other decls that came in among the parm
13045 declarations. If a parm is declared with enum {foo, bar} x;
13046 then CONST_DECLs for foo and bar are put here. */
13047 tree nonparms
= NULL_TREE
;
13049 if (current_function_parms
)
13051 /* This case is when the function was defined with an ANSI prototype.
13052 The parms already have decls, so we need not do anything here
13053 except record them as in effect
13054 and complain if any redundant old-style parm decls were written. */
13056 tree specparms
= current_function_parms
;
13059 /* Must clear this because it might contain TYPE_DECLs declared
13061 current_binding_level
->names
= NULL
;
13063 /* If we're doing semantic analysis, then we'll call pushdecl
13064 for each of these. We must do them in reverse order so that
13065 they end in the correct forward order. */
13066 specparms
= nreverse (specparms
);
13068 for (parm
= specparms
; parm
; parm
= next
)
13070 next
= DECL_CHAIN (parm
);
13071 if (TREE_CODE (parm
) == PARM_DECL
)
13073 if (DECL_NAME (parm
) == NULL_TREE
13074 || TREE_CODE (parm
) != VOID_TYPE
)
13077 error ("parameter %qD declared void", parm
);
13081 /* If we find an enum constant or a type tag,
13082 put it aside for the moment. */
13083 TREE_CHAIN (parm
) = NULL_TREE
;
13084 nonparms
= chainon (nonparms
, parm
);
13088 /* Get the decls in their original chain order and record in the
13089 function. This is all and only the PARM_DECLs that were
13090 pushed into scope by the loop above. */
13091 DECL_ARGUMENTS (fndecl
) = getdecls ();
13094 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13096 /* Now store the final chain of decls for the arguments
13097 as the decl-chain of the current lexical scope.
13098 Put the enumerators in as well, at the front so that
13099 DECL_ARGUMENTS is not modified. */
13100 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13102 if (use_eh_spec_block (current_function_decl
))
13103 current_eh_spec_block
= begin_eh_spec_block ();
13107 /* We have finished doing semantic analysis on DECL, but have not yet
13108 generated RTL for its body. Save away our current state, so that
13109 when we want to generate RTL later we know what to do. */
13112 save_function_data (tree decl
)
13114 struct language_function
*f
;
13116 /* Save the language-specific per-function data so that we can
13117 get it back when we really expand this function. */
13118 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13121 f
= ggc_alloc_language_function ();
13122 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13123 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13125 /* Clear out the bits we don't need. */
13126 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13127 f
->bindings
= NULL
;
13128 f
->x_local_names
= NULL
;
13129 f
->base
.local_typedefs
= NULL
;
13133 /* Set the return value of the constructor (if present). */
13136 finish_constructor_body (void)
13141 if (targetm
.cxx
.cdtor_returns_this ()
13142 && (! TYPE_FOR_JAVA (current_class_type
)))
13144 /* Any return from a constructor will end up here. */
13145 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13147 val
= DECL_ARGUMENTS (current_function_decl
);
13148 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13149 DECL_RESULT (current_function_decl
), val
);
13150 /* Return the address of the object. */
13151 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13152 add_stmt (exprstmt
);
13156 /* Do all the processing for the beginning of a destructor; set up the
13157 vtable pointers and cleanups for bases and members. */
13160 begin_destructor_body (void)
13162 tree compound_stmt
;
13164 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13165 issued an error message. We still want to try to process the
13166 body of the function, but initialize_vtbl_ptrs will crash if
13167 TYPE_BINFO is NULL. */
13168 if (COMPLETE_TYPE_P (current_class_type
))
13170 compound_stmt
= begin_compound_stmt (0);
13171 /* Make all virtual function table pointers in non-virtual base
13172 classes point to CURRENT_CLASS_TYPE's virtual function
13174 initialize_vtbl_ptrs (current_class_ptr
);
13175 finish_compound_stmt (compound_stmt
);
13177 /* And insert cleanups for our bases and members so that they
13178 will be properly destroyed if we throw. */
13179 push_base_cleanups ();
13183 /* At the end of every destructor we generate code to delete the object if
13184 necessary. Do that now. */
13187 finish_destructor_body (void)
13191 /* Any return from a destructor will end up here; that way all base
13192 and member cleanups will be run when the function returns. */
13193 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13195 /* In a virtual destructor, we must call delete. */
13196 if (DECL_VIRTUAL_P (current_function_decl
))
13199 tree virtual_size
= cxx_sizeof (current_class_type
);
13203 At the point of definition of a virtual destructor (including
13204 an implicit definition), non-placement operator delete shall
13205 be looked up in the scope of the destructor's class and if
13206 found shall be accessible and unambiguous. */
13207 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
13209 /*global_p=*/false,
13210 /*placement=*/NULL_TREE
,
13211 /*alloc_fn=*/NULL_TREE
);
13213 if_stmt
= begin_if_stmt ();
13214 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13215 current_in_charge_parm
,
13218 finish_expr_stmt (exprstmt
);
13219 finish_then_clause (if_stmt
);
13220 finish_if_stmt (if_stmt
);
13223 if (targetm
.cxx
.cdtor_returns_this ())
13227 val
= DECL_ARGUMENTS (current_function_decl
);
13228 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13229 DECL_RESULT (current_function_decl
), val
);
13230 /* Return the address of the object. */
13231 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13232 add_stmt (exprstmt
);
13236 /* Do the necessary processing for the beginning of a function body, which
13237 in this case includes member-initializers, but not the catch clauses of
13238 a function-try-block. Currently, this means opening a binding level
13239 for the member-initializers (in a ctor), member cleanups (in a dtor),
13240 and capture proxies (in a lambda operator()). */
13243 begin_function_body (void)
13247 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13250 if (processing_template_decl
)
13251 /* Do nothing now. */;
13253 /* Always keep the BLOCK node associated with the outermost pair of
13254 curly braces of a function. These are needed for correct
13255 operation of dwarfout.c. */
13256 keep_next_level (true);
13258 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13260 if (processing_template_decl
)
13261 /* Do nothing now. */;
13262 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13263 begin_destructor_body ();
13268 /* Do the processing for the end of a function body. Currently, this means
13269 closing out the cleanups for fully-constructed bases and members, and in
13270 the case of the destructor, deleting the object if desired. Again, this
13271 is only meaningful for [cd]tors, since they are the only functions where
13272 there is a significant distinction between the main body and any
13273 function catch clauses. Handling, say, main() return semantics here
13274 would be wrong, as flowing off the end of a function catch clause for
13275 main() would also need to return 0. */
13278 finish_function_body (tree compstmt
)
13280 if (compstmt
== NULL_TREE
)
13283 /* Close the block. */
13284 finish_compound_stmt (compstmt
);
13286 if (processing_template_decl
)
13287 /* Do nothing now. */;
13288 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13289 finish_constructor_body ();
13290 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13291 finish_destructor_body ();
13294 /* Given a function, returns the BLOCK corresponding to the outermost level
13295 of curly braces, skipping the artificial block created for constructor
13299 outer_curly_brace_block (tree fndecl
)
13301 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13302 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13303 /* Skip the artificial function body block. */
13304 block
= BLOCK_SUBBLOCKS (block
);
13308 /* If FNDECL is a class's key method, add the class to the list of
13309 keyed classes that should be emitted. */
13312 record_key_method_defined (tree fndecl
)
13314 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13315 && DECL_VIRTUAL_P (fndecl
)
13316 && !processing_template_decl
)
13318 tree fnclass
= DECL_CONTEXT (fndecl
);
13319 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13320 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13324 /* Subroutine of finish_function.
13325 Save the body of constexpr functions for possible
13326 future compile time evaluation. */
13329 maybe_save_function_definition (tree fun
)
13331 if (!processing_template_decl
13332 && DECL_DECLARED_CONSTEXPR_P (fun
)
13333 && !DECL_CLONED_FUNCTION_P (fun
))
13334 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13337 /* Finish up a function declaration and compile that function
13338 all the way to assembler language output. The free the storage
13339 for the function definition.
13341 FLAGS is a bitwise or of the following values:
13343 We just finished processing the body of an in-class inline
13344 function definition. (This processing will have taken place
13345 after the class definition is complete.) */
13348 finish_function (int flags
)
13350 tree fndecl
= current_function_decl
;
13351 tree fntype
, ctype
= NULL_TREE
;
13352 int inclass_inline
= (flags
& 2) != 0;
13354 /* When we get some parse errors, we can end up without a
13355 current_function_decl, so cope. */
13356 if (fndecl
== NULL_TREE
)
13357 return error_mark_node
;
13359 if (c_dialect_objc ())
13360 objc_finish_function ();
13362 gcc_assert (!defer_mark_used_calls
);
13363 defer_mark_used_calls
= true;
13365 record_key_method_defined (fndecl
);
13367 fntype
= TREE_TYPE (fndecl
);
13369 /* TREE_READONLY (fndecl) = 1;
13370 This caused &foo to be of type ptr-to-const-function
13371 which then got a warning when stored in a ptr-to-function variable. */
13373 gcc_assert (building_stmt_list_p ());
13374 /* The current function is being defined, so its DECL_INITIAL should
13375 be set, and unless there's a multiple definition, it should be
13376 error_mark_node. */
13377 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13379 /* For a cloned function, we've already got all the code we need;
13380 there's no need to add any extra bits. */
13381 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13383 if (DECL_MAIN_P (current_function_decl
))
13385 /* Make it so that `main' always returns 0 by default (or
13388 finish_return_stmt (integer_one_node
);
13390 finish_return_stmt (integer_zero_node
);
13394 if (use_eh_spec_block (current_function_decl
))
13395 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13396 (TREE_TYPE (current_function_decl
)),
13397 current_eh_spec_block
);
13400 /* If we're saving up tree structure, tie off the function now. */
13401 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13403 finish_fname_decls ();
13405 /* If this function can't throw any exceptions, remember that. */
13406 if (!processing_template_decl
13407 && !cp_function_chain
->can_throw
13408 && !flag_non_call_exceptions
13409 && !decl_replaceable_p (fndecl
))
13410 TREE_NOTHROW (fndecl
) = 1;
13412 /* This must come after expand_function_end because cleanups might
13413 have declarations (from inline functions) that need to go into
13414 this function's blocks. */
13416 /* If the current binding level isn't the outermost binding level
13417 for this function, either there is a bug, or we have experienced
13418 syntax errors and the statement tree is malformed. */
13419 if (current_binding_level
->kind
!= sk_function_parms
)
13421 /* Make sure we have already experienced errors. */
13422 gcc_assert (errorcount
);
13424 /* Throw away the broken statement tree and extra binding
13426 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13428 while (current_binding_level
->kind
!= sk_function_parms
)
13430 if (current_binding_level
->kind
== sk_class
)
13431 pop_nested_class ();
13433 poplevel (0, 0, 0);
13436 poplevel (1, 0, 1);
13438 /* Statements should always be full-expressions at the outermost set
13439 of curly braces for a function. */
13440 gcc_assert (stmts_are_full_exprs_p ());
13442 /* Save constexpr function body before it gets munged by
13443 the NRV transformation. */
13444 maybe_save_function_definition (fndecl
);
13446 /* Set up the named return value optimization, if we can. Candidate
13447 variables are selected in check_return_expr. */
13448 if (current_function_return_value
)
13450 tree r
= current_function_return_value
;
13453 if (r
!= error_mark_node
13454 /* This is only worth doing for fns that return in memory--and
13455 simpler, since we don't have to worry about promoted modes. */
13456 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13457 /* Only allow this for variables declared in the outer scope of
13458 the function so we know that their lifetime always ends with a
13459 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13460 we were to do this optimization in tree-ssa. */
13461 && (outer
= outer_curly_brace_block (fndecl
))
13462 && chain_member (r
, BLOCK_VARS (outer
)))
13463 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13465 current_function_return_value
= NULL_TREE
;
13468 /* Remember that we were in class scope. */
13469 if (current_class_name
)
13470 ctype
= current_class_type
;
13472 /* Must mark the RESULT_DECL as being in this function. */
13473 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13475 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13476 to the FUNCTION_DECL node itself. */
13477 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13479 /* Save away current state, if appropriate. */
13480 if (!processing_template_decl
)
13481 save_function_data (fndecl
);
13483 /* Complain if there's just no return statement. */
13484 if (warn_return_type
13485 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13486 && !dependent_type_p (TREE_TYPE (fntype
))
13487 && !current_function_returns_value
&& !current_function_returns_null
13488 /* Don't complain if we abort or throw. */
13489 && !current_function_returns_abnormally
13490 /* Don't complain if we are declared noreturn. */
13491 && !TREE_THIS_VOLATILE (fndecl
)
13492 && !DECL_NAME (DECL_RESULT (fndecl
))
13493 && !TREE_NO_WARNING (fndecl
)
13494 /* Structor return values (if any) are set by the compiler. */
13495 && !DECL_CONSTRUCTOR_P (fndecl
)
13496 && !DECL_DESTRUCTOR_P (fndecl
))
13498 warning (OPT_Wreturn_type
,
13499 "no return statement in function returning non-void");
13500 TREE_NO_WARNING (fndecl
) = 1;
13503 /* Store the end of the function, so that we get good line number
13504 info for the epilogue. */
13505 cfun
->function_end_locus
= input_location
;
13507 /* Complain about parameters that are only set, but never otherwise used. */
13508 if (warn_unused_but_set_parameter
13509 && !processing_template_decl
13510 && errorcount
== unused_but_set_errorcount
13511 && !DECL_CLONED_FUNCTION_P (fndecl
))
13515 for (decl
= DECL_ARGUMENTS (fndecl
);
13517 decl
= DECL_CHAIN (decl
))
13518 if (TREE_USED (decl
)
13519 && TREE_CODE (decl
) == PARM_DECL
13520 && !DECL_READ_P (decl
)
13521 && DECL_NAME (decl
)
13522 && !DECL_ARTIFICIAL (decl
)
13523 && !TREE_NO_WARNING (decl
)
13524 && !DECL_IN_SYSTEM_HEADER (decl
)
13525 && TREE_TYPE (decl
) != error_mark_node
13526 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13527 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13528 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13529 warning (OPT_Wunused_but_set_parameter
,
13530 "parameter %q+D set but not used", decl
);
13531 unused_but_set_errorcount
= errorcount
;
13534 /* Complain about locally defined typedefs that are not used in this
13536 maybe_warn_unused_local_typedefs ();
13538 /* Genericize before inlining. */
13539 if (!processing_template_decl
)
13541 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13542 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13543 cp_genericize (fndecl
);
13544 /* Clear out the bits we don't need. */
13545 f
->x_current_class_ptr
= NULL
;
13546 f
->x_current_class_ref
= NULL
;
13547 f
->x_eh_spec_block
= NULL
;
13548 f
->x_in_charge_parm
= NULL
;
13549 f
->x_vtt_parm
= NULL
;
13550 f
->x_return_value
= NULL
;
13551 f
->bindings
= NULL
;
13552 f
->extern_decl_map
= NULL
;
13554 /* Clear out the bits we don't need. */
13555 local_names
= NULL
;
13557 /* We're leaving the context of this function, so zap cfun. It's still in
13558 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13560 current_function_decl
= NULL
;
13562 /* If this is an in-class inline definition, we may have to pop the
13563 bindings for the template parameters that we added in
13564 maybe_begin_member_template_processing when start_function was
13566 if (inclass_inline
)
13567 maybe_end_member_template_processing ();
13569 /* Leave the scope of the class. */
13571 pop_nested_class ();
13576 current_function_decl
= NULL_TREE
;
13578 defer_mark_used_calls
= false;
13579 if (deferred_mark_used_calls
)
13584 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13586 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13592 /* Create the FUNCTION_DECL for a function definition.
13593 DECLSPECS and DECLARATOR are the parts of the declaration;
13594 they describe the return type and the name of the function,
13595 but twisted together in a fashion that parallels the syntax of C.
13597 This function creates a binding context for the function body
13598 as well as setting up the FUNCTION_DECL in current_function_decl.
13600 Returns a FUNCTION_DECL on success.
13602 If the DECLARATOR is not suitable for a function (it defines a datum
13603 instead), we return 0, which tells yyparse to report a parse error.
13605 May return void_type_node indicating that this method is actually
13606 a friend. See grokfield for more details.
13608 Came here with a `.pushlevel' .
13610 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13611 CHANGES TO CODE IN `grokfield'. */
13614 grokmethod (cp_decl_specifier_seq
*declspecs
,
13615 const cp_declarator
*declarator
, tree attrlist
)
13617 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13620 if (fndecl
== error_mark_node
)
13621 return error_mark_node
;
13623 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13625 error ("invalid member function declaration");
13626 return error_mark_node
;
13630 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13632 /* Pass friends other than inline friend functions back. */
13633 if (fndecl
== void_type_node
)
13636 if (DECL_IN_AGGR_P (fndecl
))
13638 if (DECL_CLASS_SCOPE_P (fndecl
))
13639 error ("%qD is already defined in class %qT", fndecl
,
13640 DECL_CONTEXT (fndecl
));
13641 return error_mark_node
;
13644 check_template_shadow (fndecl
);
13646 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13647 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13649 /* We process method specializations in finish_struct_1. */
13650 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13652 fndecl
= push_template_decl (fndecl
);
13653 if (fndecl
== error_mark_node
)
13657 if (! DECL_FRIEND_P (fndecl
))
13659 if (DECL_CHAIN (fndecl
))
13661 fndecl
= copy_node (fndecl
);
13662 TREE_CHAIN (fndecl
) = NULL_TREE
;
13666 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
13668 DECL_IN_AGGR_P (fndecl
) = 1;
13673 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13674 we can lay it out later, when and if its type becomes complete. */
13677 maybe_register_incomplete_var (tree var
)
13679 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
13681 /* Keep track of variables with incomplete types. */
13682 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
13683 && DECL_EXTERNAL (var
))
13685 tree inner_type
= TREE_TYPE (var
);
13687 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
13688 inner_type
= TREE_TYPE (inner_type
);
13689 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
13691 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
13692 /* RTTI TD entries are created while defining the type_info. */
13693 || (TYPE_LANG_SPECIFIC (inner_type
)
13694 && TYPE_BEING_DEFINED (inner_type
)))
13697 = VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, NULL
);
13699 iv
->incomplete_type
= inner_type
;
13704 /* Called when a class type (given by TYPE) is defined. If there are
13705 any existing VAR_DECLs whose type has been completed by this
13706 declaration, update them now. */
13709 complete_vars (tree type
)
13712 incomplete_var
*iv
;
13714 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
13716 if (same_type_p (type
, iv
->incomplete_type
))
13718 tree var
= iv
->decl
;
13719 tree type
= TREE_TYPE (var
);
13720 /* Complete the type of the variable. The VAR_DECL itself
13721 will be laid out in expand_expr. */
13722 complete_type (type
);
13723 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
13724 /* Remove this entry from the list. */
13725 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
13731 /* Check for pending declarations which may have abstract type. */
13732 complete_type_check_abstract (type
);
13735 /* If DECL is of a type which needs a cleanup, build and return an
13736 expression to perform that cleanup here. Return NULL_TREE if no
13737 cleanup need be done. */
13740 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
13746 /* Assume no cleanup is required. */
13747 cleanup
= NULL_TREE
;
13749 if (error_operand_p (decl
))
13752 /* Handle "__attribute__((cleanup))". We run the cleanup function
13753 before the destructor since the destructor is what actually
13754 terminates the lifetime of the object. */
13755 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
13762 /* Get the name specified by the user for the cleanup function. */
13763 id
= TREE_VALUE (TREE_VALUE (attr
));
13764 /* Look up the name to find the cleanup function to call. It is
13765 important to use lookup_name here because that is what is
13766 used in c-common.c:handle_cleanup_attribute when performing
13767 initial checks on the attribute. Note that those checks
13768 include ensuring that the function found is not an overloaded
13769 function, or an object with an overloaded call operator,
13770 etc.; we can rely on the fact that the function found is an
13771 ordinary FUNCTION_DECL. */
13772 fn
= lookup_name (id
);
13773 arg
= build_address (decl
);
13775 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
13776 if (cleanup
== error_mark_node
)
13777 return error_mark_node
;
13779 /* Handle ordinary C++ destructors. */
13780 type
= TREE_TYPE (decl
);
13781 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
13783 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
13784 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
13785 && CLASSTYPE_VBASECLASSES (type
));
13789 if (TREE_CODE (type
) == ARRAY_TYPE
)
13792 addr
= build_address (decl
);
13794 /* Optimize for space over speed here. */
13795 if (!has_vbases
|| flag_expensive_optimizations
)
13796 flags
|= LOOKUP_NONVIRTUAL
;
13798 call
= build_delete (TREE_TYPE (addr
), addr
,
13799 sfk_complete_destructor
, flags
, 0, complain
);
13800 if (call
== error_mark_node
)
13801 cleanup
= error_mark_node
;
13803 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
13808 /* build_delete sets the location of the destructor call to the
13809 current location, even though the destructor is going to be
13810 called later, at the end of the current scope. This can lead to
13811 a "jumpy" behaviour for users of debuggers when they step around
13812 the end of the block. So let's unset the location of the
13813 destructor call instead. */
13814 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
13815 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
13820 /* When a stmt has been parsed, this function is called. */
13827 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13828 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13829 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13832 static_fn_type (tree memfntype
)
13837 if (TYPE_PTRMEMFUNC_P (memfntype
))
13838 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13839 if (POINTER_TYPE_P (memfntype
)
13840 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13841 memfntype
= TREE_TYPE (memfntype
);
13842 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13844 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13845 args
= TYPE_ARG_TYPES (memfntype
);
13846 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13847 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13848 fntype
= (cp_build_type_attribute_variant
13849 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13850 fntype
= (build_exception_variant
13851 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13855 /* DECL was originally constructed as a non-static member function,
13856 but turned out to be static. Update it accordingly. */
13859 revert_static_member_fn (tree decl
)
13861 tree stype
= static_fn_type (decl
);
13862 cp_cv_quals quals
= type_memfn_quals (stype
);
13864 if (quals
!= TYPE_UNQUALIFIED
)
13865 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
13867 TREE_TYPE (decl
) = stype
;
13869 if (DECL_ARGUMENTS (decl
))
13870 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
13871 DECL_STATIC_FUNCTION_P (decl
) = 1;
13874 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13875 one of the language-independent trees. */
13877 enum cp_tree_node_structure_enum
13878 cp_tree_node_structure (union lang_tree_node
* t
)
13880 switch (TREE_CODE (&t
->generic
))
13882 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13883 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
13884 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13885 case OVERLOAD
: return TS_CP_OVERLOAD
;
13886 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13887 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13888 case BASELINK
: return TS_CP_BASELINK
;
13889 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13890 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13891 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13892 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13893 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13894 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
13895 default: return TS_CP_GENERIC
;
13899 /* Build the void_list_node (void_type_node having been created). */
13901 build_void_list_node (void)
13903 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13908 cp_missing_noreturn_ok_p (tree decl
)
13910 /* A missing noreturn is ok for the `main' function. */
13911 return DECL_MAIN_P (decl
);
13914 /* Return the COMDAT group into which DECL should be placed. */
13917 cxx_comdat_group (tree decl
)
13921 /* Virtual tables, construction virtual tables, and virtual table
13922 tables all go in a single COMDAT group, named after the primary
13924 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13925 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
13926 /* For all other DECLs, the COMDAT group is the mangled name of the
13927 declaration itself. */
13930 while (DECL_THUNK_P (decl
))
13932 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13933 into the same section as the target function. In that case
13934 we must return target's name. */
13935 tree target
= THUNK_TARGET (decl
);
13936 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
13937 && DECL_SECTION_NAME (target
) != NULL
13938 && DECL_ONE_ONLY (target
))
13943 name
= DECL_ASSEMBLER_NAME (decl
);
13949 #include "gt-cp-decl.h"