1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
47 #include "c-family/c-common.h"
48 #include "c-family/c-objc.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "pointer-set.h"
55 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR
, /* variable */
61 BSP_PARM
, /* parameter */
66 static tree
grokparms (tree parmlist
, tree
*);
67 static const char *redeclaration_error_message (tree
, tree
);
69 static int decl_jump_unsafe (tree
);
70 static void require_complete_types_for_parms (tree
);
71 static int ambi_op_p (enum tree_code
);
72 static int unary_op_p (enum tree_code
);
73 static void push_local_name (tree
);
74 static tree
grok_reference_init (tree
, tree
, tree
, int);
75 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
77 static int check_static_variable_definition (tree
, tree
);
78 static void record_unknown_type (tree
, const char *);
79 static tree
builtin_function_1 (tree
, tree
, bool);
80 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
81 static int member_function_or_else (tree
, tree
, enum overload_flags
);
82 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
84 static void check_for_uninitialized_const_var (tree
);
85 static hashval_t
typename_hash (const void *);
86 static int typename_compare (const void *, const void *);
87 static tree
local_variable_p_walkfn (tree
*, int *, void *);
88 static tree
record_builtin_java_type (const char *, int);
89 static const char *tag_name (enum tag_types
);
90 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
91 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
92 static void maybe_deduce_size_from_array_init (tree
, tree
);
93 static void layout_var_decl (tree
);
94 static tree
check_initializer (tree
, tree
, int, VEC(tree
,gc
) **);
95 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
96 static void save_function_data (tree
);
97 static void copy_type_enum (tree
, tree
);
98 static void check_function_type (tree
, tree
);
99 static void finish_constructor_body (void);
100 static void begin_destructor_body (void);
101 static void finish_destructor_body (void);
102 static void record_key_method_defined (tree
);
103 static tree
create_array_type_for_decl (tree
, tree
, tree
);
104 static tree
get_atexit_node (void);
105 static tree
get_dso_handle_node (void);
106 static tree
start_cleanup_fn (void);
107 static void end_cleanup_fn (void);
108 static tree
cp_make_fname_decl (location_t
, tree
, int);
109 static void initialize_predefined_identifiers (void);
110 static tree check_special_function_return_type
111 (special_function_kind
, tree
, tree
);
112 static tree
push_cp_library_fn (enum tree_code
, tree
);
113 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
114 static void store_parm_decls (tree
);
115 static void initialize_local_var (tree
, tree
);
116 static void expand_static_init (tree
, tree
);
118 /* The following symbols are subsumed in the cp_global_trees array, and
119 listed here individually for documentation purposes.
122 tree wchar_decl_node;
124 tree vtable_entry_type;
125 tree delta_type_node;
126 tree __t_desc_type_node;
128 tree class_type_node;
129 tree unknown_type_node;
131 Array type `vtable_entry_type[]'
134 tree vtbl_ptr_type_node;
141 A FUNCTION_DECL which can call `abort'. Not necessarily the
142 one that the user will declare, but sufficient to be called
143 by routines that want to abort the program.
147 The FUNCTION_DECL for the default `::operator delete'.
149 tree global_delete_fndecl;
152 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
153 tree tinfo_var_id; */
155 tree cp_global_trees
[CPTI_MAX
];
157 /* Indicates that there is a type value in some namespace, although
158 that is not necessarily in scope at the moment. */
160 tree global_type_node
;
162 /* The node that holds the "name" of the global scope. */
163 tree global_scope_name
;
165 #define local_names cp_function_chain->x_local_names
167 /* A list of objects which have constructors or destructors
168 which reside in the global scope. The decl is stored in
169 the TREE_VALUE slot and the initializer is stored
170 in the TREE_PURPOSE slot. */
171 tree static_aggregates
;
175 /* A node for the integer constant 2. */
177 tree integer_two_node
;
179 /* Used only for jumps to as-yet undefined labels, since jumps to
180 defined labels can have their validity checked immediately. */
182 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
183 struct named_label_use_entry
*next
;
184 /* The binding level to which this entry is *currently* attached.
185 This is initially the binding level in which the goto appeared,
186 but is modified as scopes are closed. */
187 cp_binding_level
*binding_level
;
188 /* The head of the names list that was current when the goto appeared,
189 or the inner scope popped. These are the decls that will *not* be
190 skipped when jumping to the label. */
192 /* The location of the goto, for error reporting. */
193 location_t o_goto_locus
;
194 /* True if an OpenMP structured block scope has been closed since
195 the goto appeared. This means that the branch from the label will
196 illegally exit an OpenMP scope. */
200 /* A list of all LABEL_DECLs in the function that have names. Here so
201 we can clear out their names' definitions at the end of the
202 function, and so we can check the validity of jumps to these labels. */
204 struct GTY(()) named_label_entry
{
205 /* The decl itself. */
208 /* The binding level to which the label is *currently* attached.
209 This is initially set to the binding level in which the label
210 is defined, but is modified as scopes are closed. */
211 cp_binding_level
*binding_level
;
212 /* The head of the names list that was current when the label was
213 defined, or the inner scope popped. These are the decls that will
214 be skipped when jumping to the label. */
216 /* A vector of all decls from all binding levels that would be
217 crossed by a backward branch to the label. */
218 VEC(tree
,gc
) *bad_decls
;
220 /* A list of uses of the label, before the label is defined. */
221 struct named_label_use_entry
*uses
;
223 /* The following bits are set after the label is defined, and are
224 updated as scopes are popped. They indicate that a backward jump
225 to the label will illegally enter a scope of the given flavor. */
231 #define named_labels cp_function_chain->x_named_labels
233 /* The number of function bodies which we are currently processing.
234 (Zero if we are at namespace scope, one inside the body of a
235 function, two inside the body of a function in a local class, etc.) */
238 /* To avoid unwanted recursion, finish_function defers all mark_used calls
239 encountered during its execution until it finishes. */
240 bool defer_mark_used_calls
;
241 VEC(tree
, gc
) *deferred_mark_used_calls
;
243 /* States indicating how grokdeclarator() should handle declspecs marked
244 with __attribute__((deprecated)). An object declared as
245 __attribute__((deprecated)) suppresses warnings of uses of other
247 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
250 /* A list of VAR_DECLs whose type was incomplete at the time the
251 variable was declared. */
253 typedef struct GTY(()) incomplete_var_d
{
255 tree incomplete_type
;
258 DEF_VEC_O(incomplete_var
);
259 DEF_VEC_ALLOC_O(incomplete_var
,gc
);
261 static GTY(()) VEC(incomplete_var
,gc
) *incomplete_vars
;
263 /* Returns the kind of template specialization we are currently
264 processing, given that it's declaration contained N_CLASS_SCOPES
265 explicit scope qualifications. */
268 current_tmpl_spec_kind (int n_class_scopes
)
270 int n_template_parm_scopes
= 0;
271 int seen_specialization_p
= 0;
272 int innermost_specialization_p
= 0;
275 /* Scan through the template parameter scopes. */
276 for (b
= current_binding_level
;
277 b
->kind
== sk_template_parms
;
280 /* If we see a specialization scope inside a parameter scope,
281 then something is wrong. That corresponds to a declaration
284 template <class T> template <> ...
286 which is always invalid since [temp.expl.spec] forbids the
287 specialization of a class member template if the enclosing
288 class templates are not explicitly specialized as well. */
289 if (b
->explicit_spec_p
)
291 if (n_template_parm_scopes
== 0)
292 innermost_specialization_p
= 1;
294 seen_specialization_p
= 1;
296 else if (seen_specialization_p
== 1)
297 return tsk_invalid_member_spec
;
299 ++n_template_parm_scopes
;
302 /* Handle explicit instantiations. */
303 if (processing_explicit_instantiation
)
305 if (n_template_parm_scopes
!= 0)
306 /* We've seen a template parameter list during an explicit
307 instantiation. For example:
309 template <class T> template void f(int);
311 This is erroneous. */
312 return tsk_invalid_expl_inst
;
314 return tsk_expl_inst
;
317 if (n_template_parm_scopes
< n_class_scopes
)
318 /* We've not seen enough template headers to match all the
319 specialized classes present. For example:
321 template <class T> void R<T>::S<T>::f(int);
323 This is invalid; there needs to be one set of template
324 parameters for each class. */
325 return tsk_insufficient_parms
;
326 else if (n_template_parm_scopes
== n_class_scopes
)
327 /* We're processing a non-template declaration (even though it may
328 be a member of a template class.) For example:
330 template <class T> void S<T>::f(int);
332 The `class T' matches the `S<T>', leaving no template headers
333 corresponding to the `f'. */
335 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
336 /* We've got too many template headers. For example:
338 template <> template <class T> void f (T);
340 There need to be more enclosing classes. */
341 return tsk_excessive_parms
;
343 /* This must be a template. It's of the form:
345 template <class T> template <class U> void S<T>::f(U);
347 This is a specialization if the innermost level was a
348 specialization; otherwise it's just a definition of the
350 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
353 /* Exit the current scope. */
361 /* When a label goes out of scope, check to see if that label was used
362 in a valid manner, and issue any appropriate warnings or errors. */
365 pop_label (tree label
, tree old_value
)
367 if (!processing_template_decl
)
369 if (DECL_INITIAL (label
) == NULL_TREE
)
373 error ("label %q+D used but not defined", label
);
374 location
= input_location
; /* FIXME want (input_filename, (line)0) */
375 /* Avoid crashing later. */
376 define_label (location
, DECL_NAME (label
));
379 warn_for_unused_label (label
);
382 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
385 /* At the end of a function, all labels declared within the function
386 go out of scope. BLOCK is the top-level block for the
390 pop_labels_1 (void **slot
, void *data
)
392 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
393 tree block
= (tree
) data
;
395 pop_label (ent
->label_decl
, NULL_TREE
);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
400 BLOCK_VARS (block
) = ent
->label_decl
;
402 htab_clear_slot (named_labels
, slot
);
408 pop_labels (tree block
)
412 htab_traverse (named_labels
, pop_labels_1
, block
);
417 /* At the end of a block with local labels, restore the outer definition. */
420 pop_local_label (tree label
, tree old_value
)
422 struct named_label_entry dummy
;
425 pop_label (label
, old_value
);
427 dummy
.label_decl
= label
;
428 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
429 htab_clear_slot (named_labels
, slot
);
432 /* The following two routines are used to interface to Objective-C++.
433 The binding level is purposely treated as an opaque type. */
436 objc_get_current_scope (void)
438 return current_binding_level
;
441 /* The following routine is used by the NeXT-style SJLJ exceptions;
442 variables get marked 'volatile' so as to not be clobbered by
443 _setjmp()/_longjmp() calls. All variables in the current scope,
444 as well as parent scopes up to (but not including) ENCLOSING_BLK
445 shall be thusly marked. */
448 objc_mark_locals_volatile (void *enclosing_blk
)
450 cp_binding_level
*scope
;
452 for (scope
= current_binding_level
;
453 scope
&& scope
!= enclosing_blk
;
454 scope
= scope
->level_chain
)
458 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
459 objc_volatilize_decl (decl
);
461 /* Do not climb up past the current function. */
462 if (scope
->kind
== sk_function_parms
)
467 /* Update data for defined and undefined labels when leaving a scope. */
470 poplevel_named_label_1 (void **slot
, void *data
)
472 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
473 cp_binding_level
*bl
= (cp_binding_level
*) data
;
474 cp_binding_level
*obl
= bl
->level_chain
;
476 if (ent
->binding_level
== bl
)
480 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
481 TREE_LISTs representing OVERLOADs, so be careful. */
482 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
484 : TREE_CHAIN (decl
)))
485 if (decl_jump_unsafe (decl
))
486 VEC_safe_push (tree
, gc
, ent
->bad_decls
, decl
);
488 ent
->binding_level
= obl
;
489 ent
->names_in_scope
= obl
->names
;
493 ent
->in_try_scope
= true;
496 ent
->in_catch_scope
= true;
499 ent
->in_omp_scope
= true;
507 struct named_label_use_entry
*use
;
509 for (use
= ent
->uses
; use
; use
= use
->next
)
510 if (use
->binding_level
== bl
)
512 use
->binding_level
= obl
;
513 use
->names_in_scope
= obl
->names
;
514 if (bl
->kind
== sk_omp
)
515 use
->in_omp_scope
= true;
522 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
523 when errors were reported, except for -Werror-unused-but-set-*. */
524 static int unused_but_set_errorcount
;
526 /* Exit a binding level.
527 Pop the level off, and restore the state of the identifier-decl mappings
528 that were in effect when this level was entered.
530 If KEEP == 1, this level had explicit declarations, so
531 and create a "block" (a BLOCK node) for the level
532 to record its declarations and subblocks for symbol table output.
534 If FUNCTIONBODY is nonzero, this level is the body of a function,
535 so create a block as if KEEP were set and also clear out all
538 If REVERSE is nonzero, reverse the order of decls before putting
539 them into the BLOCK. */
542 poplevel (int keep
, int reverse
, int functionbody
)
545 /* The chain of decls was accumulated in reverse order.
546 Put it into forward order, just for cleanliness. */
551 int leaving_for_scope
;
554 cp_label_binding
*label_bind
;
556 timevar_start (TV_NAME_LOOKUP
);
561 gcc_assert (current_binding_level
->kind
!= sk_class
);
563 if (current_binding_level
->kind
== sk_cleanup
)
565 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
567 gcc_assert (!VEC_length(cp_class_binding
,
568 current_binding_level
->class_shadowed
));
570 /* We used to use KEEP == 2 to indicate that the new block should go
571 at the beginning of the list of blocks at this binding level,
572 rather than the end. This hack is no longer used. */
573 gcc_assert (keep
== 0 || keep
== 1);
575 if (current_binding_level
->keep
)
578 /* Any uses of undefined labels, and any defined labels, now operate
579 under constraints of next binding contour. */
580 if (cfun
&& !functionbody
&& named_labels
)
581 htab_traverse (named_labels
, poplevel_named_label_1
,
582 current_binding_level
);
584 /* Get the decls in the order they were written.
585 Usually current_binding_level->names is in reverse order.
586 But parameter decls were previously put in forward order. */
589 current_binding_level
->names
590 = decls
= nreverse (current_binding_level
->names
);
592 decls
= current_binding_level
->names
;
594 /* If there were any declarations or structure tags in that level,
595 or if this level is a function body,
596 create a BLOCK to record them for the life of this function. */
598 if (keep
== 1 || functionbody
)
599 block
= make_node (BLOCK
);
600 if (block
!= NULL_TREE
)
602 BLOCK_VARS (block
) = decls
;
603 BLOCK_SUBBLOCKS (block
) = subblocks
;
606 /* In each subblock, record that this is its superior. */
608 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
609 BLOCK_SUPERCONTEXT (link
) = block
;
611 /* We still support the old for-scope rules, whereby the variables
612 in a for-init statement were in scope after the for-statement
613 ended. We only use the new rules if flag_new_for_scope is
616 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
618 /* Before we remove the declarations first check for unused variables. */
619 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
620 && !processing_template_decl
)
621 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
622 if (TREE_CODE (decl
) == VAR_DECL
623 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
624 && ! DECL_IN_SYSTEM_HEADER (decl
)
625 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
627 if (! TREE_USED (decl
))
628 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
629 else if (DECL_CONTEXT (decl
) == current_function_decl
630 && TREE_TYPE (decl
) != error_mark_node
631 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
632 && errorcount
== unused_but_set_errorcount
633 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
634 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
636 warning (OPT_Wunused_but_set_variable
,
637 "variable %q+D set but not used", decl
);
638 unused_but_set_errorcount
= errorcount
;
642 /* Remove declarations for all the DECLs in this level. */
643 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
645 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
646 /* It's hard to make this ARM compatibility hack play nicely with
647 lambdas, and it really isn't necessary in C++11 mode. */
648 && cxx_dialect
< cxx0x
651 tree name
= DECL_NAME (link
);
655 ob
= outer_binding (name
,
656 IDENTIFIER_BINDING (name
),
659 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
661 ns_binding
= NULL_TREE
;
663 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
664 /* We have something like:
669 and we are leaving the `for' scope. There's no reason to
670 keep the binding of the inner `i' in this case. */
671 pop_binding (name
, link
);
672 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
673 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
674 /* Here, we have something like:
682 We must pop the for-scope binding so we know what's a
683 type and what isn't. */
684 pop_binding (name
, link
);
687 /* Mark this VAR_DECL as dead so that we can tell we left it
688 there only for backward compatibility. */
689 DECL_DEAD_FOR_LOCAL (link
) = 1;
691 /* Keep track of what should have happened when we
692 popped the binding. */
695 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
696 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
699 /* Add it to the list of dead variables in the next
700 outermost binding to that we can remove these when we
701 leave that binding. */
702 VEC_safe_push (tree
, gc
,
703 current_binding_level
->level_chain
->dead_vars_from_for
,
706 /* Although we don't pop the cxx_binding, we do clear
707 its SCOPE since the scope is going away now. */
708 IDENTIFIER_BINDING (name
)->scope
709 = current_binding_level
->level_chain
;
716 /* Remove the binding. */
719 if (TREE_CODE (decl
) == TREE_LIST
)
720 decl
= TREE_VALUE (decl
);
723 if (TREE_CODE (name
) == OVERLOAD
)
724 name
= OVL_FUNCTION (name
);
726 gcc_assert (DECL_P (name
));
727 pop_binding (DECL_NAME (name
), decl
);
731 /* Remove declarations for any `for' variables from inner scopes
732 that we kept around. */
733 FOR_EACH_VEC_ELT_REVERSE (tree
, current_binding_level
->dead_vars_from_for
,
735 pop_binding (DECL_NAME (decl
), decl
);
737 /* Restore the IDENTIFIER_TYPE_VALUEs. */
738 for (link
= current_binding_level
->type_shadowed
;
739 link
; link
= TREE_CHAIN (link
))
740 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
742 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
743 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding
,
744 current_binding_level
->shadowed_labels
,
746 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
748 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
749 list if a `using' declaration put them there. The debugging
750 back ends won't understand OVERLOAD, so we remove them here.
751 Because the BLOCK_VARS are (temporarily) shared with
752 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
753 popped all the bindings. */
758 for (d
= &BLOCK_VARS (block
); *d
; )
760 if (TREE_CODE (*d
) == TREE_LIST
)
761 *d
= TREE_CHAIN (*d
);
763 d
= &DECL_CHAIN (*d
);
767 /* If the level being exited is the top level of a function,
768 check over all the labels. */
771 /* Since this is the top level block of a function, the vars are
772 the function's parameters. Don't leave them in the BLOCK
773 because they are found in the FUNCTION_DECL instead. */
774 BLOCK_VARS (block
) = 0;
778 kind
= current_binding_level
->kind
;
779 if (kind
== sk_cleanup
)
783 /* If this is a temporary binding created for a cleanup, then we'll
784 have pushed a statement list level. Pop that, create a new
785 BIND_EXPR for the block, and insert it into the stream. */
786 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
787 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
794 /* The current function is being defined, so its DECL_INITIAL
795 should be error_mark_node. */
796 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
797 DECL_INITIAL (current_function_decl
) = block
;
800 current_binding_level
->blocks
801 = block_chainon (current_binding_level
->blocks
, block
);
803 /* If we did not make a block for the level just exited,
804 any blocks made for inner levels
805 (since they cannot be recorded as subblocks in that level)
806 must be carried forward so they will later become subblocks
807 of something else. */
809 current_binding_level
->blocks
810 = block_chainon (current_binding_level
->blocks
, subblocks
);
812 /* Each and every BLOCK node created here in `poplevel' is important
813 (e.g. for proper debugging information) so if we created one
814 earlier, mark it as "used". */
816 TREE_USED (block
) = 1;
818 /* All temporary bindings created for cleanups are popped silently. */
819 if (kind
== sk_cleanup
)
822 timevar_stop (TV_NAME_LOOKUP
);
826 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
827 itself, calling F for each. The DATA is passed to F as well. */
830 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
833 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
835 result
|= (*f
) (name_space
, data
);
837 for (; current
; current
= DECL_CHAIN (current
))
838 result
|= walk_namespaces_r (current
, f
, data
);
843 /* Walk all the namespaces, calling F for each. The DATA is passed to
847 walk_namespaces (walk_namespaces_fn f
, void* data
)
849 return walk_namespaces_r (global_namespace
, f
, data
);
852 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
853 DATA is non-NULL, this is the last time we will call
854 wrapup_global_declarations for this NAMESPACE. */
857 wrapup_globals_for_namespace (tree name_space
, void* data
)
859 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
860 VEC(tree
,gc
) *statics
= level
->static_decls
;
861 tree
*vec
= VEC_address (tree
, statics
);
862 int len
= VEC_length (tree
, statics
);
863 int last_time
= (data
!= 0);
867 check_global_declarations (vec
, len
);
868 emit_debug_global_declarations (vec
, len
);
872 /* Write out any globals that need to be output. */
873 return wrapup_global_declarations (vec
, len
);
877 /* In C++, you don't have to write `struct S' to refer to `S'; you
878 can just use `S'. We accomplish this by creating a TYPE_DECL as
879 if the user had written `typedef struct S S'. Create and return
880 the TYPE_DECL for TYPE. */
883 create_implicit_typedef (tree name
, tree type
)
887 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
888 DECL_ARTIFICIAL (decl
) = 1;
889 /* There are other implicit type declarations, like the one *within*
890 a class that allows you to write `S::S'. We must distinguish
892 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
893 TYPE_NAME (type
) = decl
;
894 TYPE_STUB_DECL (type
) = decl
;
899 /* Remember a local name for name-mangling purposes. */
902 push_local_name (tree decl
)
907 timevar_start (TV_NAME_LOOKUP
);
909 name
= DECL_NAME (decl
);
911 nelts
= VEC_length (tree
, local_names
);
912 for (i
= 0; i
< nelts
; i
++)
914 t
= VEC_index (tree
, local_names
, i
);
915 if (DECL_NAME (t
) == name
)
917 if (!DECL_LANG_SPECIFIC (decl
))
918 retrofit_lang_decl (decl
);
919 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
920 if (DECL_LANG_SPECIFIC (t
))
921 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
923 DECL_DISCRIMINATOR (decl
) = 1;
925 VEC_replace (tree
, local_names
, i
, decl
);
926 timevar_stop (TV_NAME_LOOKUP
);
931 VEC_safe_push (tree
, gc
, local_names
, decl
);
932 timevar_stop (TV_NAME_LOOKUP
);
935 /* Subroutine of duplicate_decls: return truthvalue of whether
936 or not types of these decls match.
938 For C++, we must compare the parameter list so that `int' can match
939 `int&' in a parameter position, but `int&' is not confused with
943 decls_match (tree newdecl
, tree olddecl
)
947 if (newdecl
== olddecl
)
950 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
951 /* If the two DECLs are not even the same kind of thing, we're not
952 interested in their types. */
955 gcc_assert (DECL_P (newdecl
));
957 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
959 tree f1
= TREE_TYPE (newdecl
);
960 tree f2
= TREE_TYPE (olddecl
);
961 tree p1
= TYPE_ARG_TYPES (f1
);
962 tree p2
= TYPE_ARG_TYPES (f2
);
964 /* Specializations of different templates are different functions
965 even if they have the same type. */
966 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
967 ? DECL_TI_TEMPLATE (newdecl
)
969 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
970 ? DECL_TI_TEMPLATE (olddecl
)
975 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
976 && ! (DECL_EXTERN_C_P (newdecl
)
977 && DECL_EXTERN_C_P (olddecl
)))
980 #ifdef NO_IMPLICIT_EXTERN_C
981 /* A new declaration doesn't match a built-in one unless it
982 is also extern "C". */
983 if (DECL_IS_BUILTIN (olddecl
)
984 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
988 if (TREE_CODE (f1
) != TREE_CODE (f2
))
991 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
993 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
994 && (DECL_BUILT_IN (olddecl
)
995 #ifndef NO_IMPLICIT_EXTERN_C
996 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
997 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1001 types_match
= self_promoting_args_p (p1
);
1002 if (p1
== void_list_node
)
1003 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1005 #ifndef NO_IMPLICIT_EXTERN_C
1006 else if (!prototype_p (f1
)
1007 && (DECL_EXTERN_C_P (olddecl
)
1008 && DECL_IN_SYSTEM_HEADER (olddecl
)
1009 && !DECL_CLASS_SCOPE_P (olddecl
))
1010 && (DECL_EXTERN_C_P (newdecl
)
1011 && DECL_IN_SYSTEM_HEADER (newdecl
)
1012 && !DECL_CLASS_SCOPE_P (newdecl
)))
1014 types_match
= self_promoting_args_p (p2
);
1015 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1021 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1022 || comp_type_attributes (TREE_TYPE (newdecl
),
1023 TREE_TYPE (olddecl
)) != 0);
1028 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1030 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1031 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1034 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1035 DECL_TEMPLATE_PARMS (olddecl
)))
1038 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1039 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1040 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1042 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1043 DECL_TEMPLATE_RESULT (newdecl
));
1047 /* Need to check scope for variable declaration (VAR_DECL).
1048 For typedef (TYPE_DECL), scope is ignored. */
1049 if (TREE_CODE (newdecl
) == VAR_DECL
1050 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1052 Two declarations for an object with C language linkage
1053 with the same name (ignoring the namespace that qualify
1054 it) that appear in different namespace scopes refer to
1056 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1059 if (TREE_TYPE (newdecl
) == error_mark_node
)
1060 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1061 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1062 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1063 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1066 types_match
= comptypes (TREE_TYPE (newdecl
),
1067 TREE_TYPE (olddecl
),
1068 COMPARE_REDECLARATION
);
1074 /* If NEWDECL is `static' and an `extern' was seen previously,
1075 warn about it. OLDDECL is the previous declaration.
1077 Note that this does not apply to the C++ case of declaring
1078 a variable `extern const' and then later `const'.
1080 Don't complain about built-in functions, since they are beyond
1081 the user's control. */
1084 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1086 if (TREE_CODE (newdecl
) == TYPE_DECL
1087 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1088 || TREE_CODE (newdecl
) == CONST_DECL
1089 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1092 /* Don't get confused by static member functions; that's a different
1094 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1095 && DECL_STATIC_FUNCTION_P (newdecl
))
1098 /* If the old declaration was `static', or the new one isn't, then
1099 everything is OK. */
1100 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1103 /* It's OK to declare a builtin function as `static'. */
1104 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1105 && DECL_ARTIFICIAL (olddecl
))
1108 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1109 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1112 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1113 function templates. If their exception specifications do not
1114 match, issue a diagnostic. */
1117 check_redeclaration_exception_specification (tree new_decl
,
1122 tree new_exceptions
;
1123 tree old_exceptions
;
1125 new_type
= TREE_TYPE (new_decl
);
1126 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1127 old_type
= TREE_TYPE (old_decl
);
1128 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1132 If any declaration of a function has an exception-specification,
1133 all declarations, including the definition and an explicit
1134 specialization, of that function shall have an
1135 exception-specification with the same set of type-ids. */
1136 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1137 && ! DECL_IS_BUILTIN (old_decl
)
1139 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1141 error ("declaration of %qF has a different exception specifier",
1143 error ("from previous declaration %q+F", old_decl
);
1147 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1148 Otherwise issue diagnostics. */
1151 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1153 old_decl
= STRIP_TEMPLATE (old_decl
);
1154 new_decl
= STRIP_TEMPLATE (new_decl
);
1155 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1156 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1158 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1159 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1161 if (TREE_CODE (old_decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (old_decl
))
1163 /* Hide a built-in declaration. */
1164 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1165 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1168 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1169 error ("from previous declaration %q+D", old_decl
);
1173 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1174 && lookup_attribute ("gnu_inline", \
1175 DECL_ATTRIBUTES (fn)))
1177 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1178 If the redeclaration is invalid, a diagnostic is issued, and the
1179 error_mark_node is returned. Otherwise, OLDDECL is returned.
1181 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1184 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1187 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1189 unsigned olddecl_uid
= DECL_UID (olddecl
);
1190 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1191 int new_defines_function
= 0;
1192 tree new_template_info
;
1194 if (newdecl
== olddecl
)
1197 types_match
= decls_match (newdecl
, olddecl
);
1199 /* If either the type of the new decl or the type of the old decl is an
1200 error_mark_node, then that implies that we have already issued an
1201 error (earlier) for some bogus type specification, and in that case,
1202 it is rather pointless to harass the user with yet more error message
1203 about the same declaration, so just pretend the types match here. */
1204 if (TREE_TYPE (newdecl
) == error_mark_node
1205 || TREE_TYPE (olddecl
) == error_mark_node
)
1206 return error_mark_node
;
1208 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1209 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1211 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1212 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1213 && check_raw_literal_operator (olddecl
))
1214 error ("literal operator template %q+D conflicts with"
1215 " raw literal operator %qD", newdecl
, olddecl
);
1216 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1217 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1218 && check_raw_literal_operator (newdecl
))
1219 error ("raw literal operator %q+D conflicts with"
1220 " literal operator template %qD", newdecl
, olddecl
);
1223 if (DECL_P (olddecl
)
1224 && TREE_CODE (newdecl
) == FUNCTION_DECL
1225 && TREE_CODE (olddecl
) == FUNCTION_DECL
1226 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1228 if (DECL_DECLARED_INLINE_P (newdecl
)
1229 && DECL_UNINLINABLE (newdecl
)
1230 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1231 /* Already warned elsewhere. */;
1232 else if (DECL_DECLARED_INLINE_P (olddecl
)
1233 && DECL_UNINLINABLE (olddecl
)
1234 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1235 /* Already warned. */;
1236 else if (DECL_DECLARED_INLINE_P (newdecl
)
1237 && DECL_UNINLINABLE (olddecl
)
1238 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1240 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1242 warning (OPT_Wattributes
, "previous declaration of %q+D "
1243 "with attribute noinline", olddecl
);
1245 else if (DECL_DECLARED_INLINE_P (olddecl
)
1246 && DECL_UNINLINABLE (newdecl
)
1247 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1249 warning (OPT_Wattributes
, "function %q+D redeclared with "
1250 "attribute noinline", newdecl
);
1251 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1256 /* Check for redeclaration and other discrepancies. */
1257 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1258 && DECL_ARTIFICIAL (olddecl
))
1260 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1261 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1263 /* Avoid warnings redeclaring built-ins which have not been
1264 explicitly declared. */
1265 if (DECL_ANTICIPATED (olddecl
))
1268 /* If you declare a built-in or predefined function name as static,
1269 the old definition is overridden, but optionally warn this was a
1270 bad choice of name. */
1271 if (! TREE_PUBLIC (newdecl
))
1273 warning (OPT_Wshadow
,
1274 DECL_BUILT_IN (olddecl
)
1275 ? G_("shadowing built-in function %q#D")
1276 : G_("shadowing library function %q#D"), olddecl
);
1277 /* Discard the old built-in function. */
1280 /* If the built-in is not ansi, then programs can override
1281 it even globally without an error. */
1282 else if (! DECL_BUILT_IN (olddecl
))
1283 warning (0, "library function %q#D redeclared as non-function %q#D",
1287 error ("declaration of %q#D", newdecl
);
1288 error ("conflicts with built-in declaration %q#D",
1293 else if (!types_match
)
1295 /* Avoid warnings redeclaring built-ins which have not been
1296 explicitly declared. */
1297 if (DECL_ANTICIPATED (olddecl
))
1299 /* Deal with fileptr_type_node. FILE type is not known
1300 at the time we create the builtins. */
1303 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1304 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1306 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1309 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1311 tree t
= TREE_VALUE (t1
);
1313 if (TREE_CODE (t
) == POINTER_TYPE
1314 && TYPE_NAME (TREE_TYPE (t
))
1315 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1316 == get_identifier ("FILE")
1317 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1319 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1321 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1322 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1323 types_match
= decls_match (newdecl
, olddecl
);
1325 return duplicate_decls (newdecl
, olddecl
,
1327 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1330 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1333 else if ((DECL_EXTERN_C_P (newdecl
)
1334 && DECL_EXTERN_C_P (olddecl
))
1335 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1336 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1338 /* A near match; override the builtin. */
1340 if (TREE_PUBLIC (newdecl
))
1342 warning (0, "new declaration %q#D", newdecl
);
1343 warning (0, "ambiguates built-in declaration %q#D",
1347 warning (OPT_Wshadow
,
1348 DECL_BUILT_IN (olddecl
)
1349 ? G_("shadowing built-in function %q#D")
1350 : G_("shadowing library function %q#D"), olddecl
);
1353 /* Discard the old built-in function. */
1356 /* Replace the old RTL to avoid problems with inlining. */
1357 COPY_DECL_RTL (newdecl
, olddecl
);
1359 /* Even if the types match, prefer the new declarations type for
1360 built-ins which have not been explicitly declared, for
1361 exception lists, etc... */
1362 else if (DECL_IS_BUILTIN (olddecl
))
1364 tree type
= TREE_TYPE (newdecl
);
1365 tree attribs
= (*targetm
.merge_type_attributes
)
1366 (TREE_TYPE (olddecl
), type
);
1368 type
= cp_build_type_attribute_variant (type
, attribs
);
1369 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1372 /* If a function is explicitly declared "throw ()", propagate that to
1373 the corresponding builtin. */
1374 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1375 && DECL_ANTICIPATED (olddecl
)
1376 && TREE_NOTHROW (newdecl
)
1377 && !TREE_NOTHROW (olddecl
))
1379 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1380 tree tmpdecl
= builtin_decl_explicit (fncode
);
1381 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1382 TREE_NOTHROW (tmpdecl
) = 1;
1385 /* Whether or not the builtin can throw exceptions has no
1386 bearing on this declarator. */
1387 TREE_NOTHROW (olddecl
) = 0;
1389 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1391 /* If a builtin function is redeclared as `static', merge
1392 the declarations, but make the original one static. */
1393 DECL_THIS_STATIC (olddecl
) = 1;
1394 TREE_PUBLIC (olddecl
) = 0;
1396 /* Make the old declaration consistent with the new one so
1397 that all remnants of the builtin-ness of this function
1398 will be banished. */
1399 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1400 COPY_DECL_RTL (newdecl
, olddecl
);
1403 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1405 /* C++ Standard, 3.3, clause 4:
1406 "[Note: a namespace name or a class template name must be unique
1407 in its declarative region (7.3.2, clause 14). ]" */
1408 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1409 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1410 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1411 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1412 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1413 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1415 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1416 && TREE_CODE (newdecl
) != TYPE_DECL
)
1417 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1418 && TREE_CODE (olddecl
) != TYPE_DECL
))
1420 /* We do nothing special here, because C++ does such nasty
1421 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1422 get shadowed, and know that if we need to find a TYPE_DECL
1423 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1424 slot of the identifier. */
1428 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1429 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1430 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1431 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1435 error ("%q#D redeclared as different kind of symbol", newdecl
);
1436 if (TREE_CODE (olddecl
) == TREE_LIST
)
1437 olddecl
= TREE_VALUE (olddecl
);
1438 error ("previous declaration of %q+#D", olddecl
);
1440 return error_mark_node
;
1442 else if (!types_match
)
1444 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1445 /* These are certainly not duplicate declarations; they're
1446 from different scopes. */
1449 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1451 /* The name of a class template may not be declared to refer to
1452 any other template, class, function, object, namespace, value,
1453 or type in the same scope. */
1454 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1455 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1457 error ("declaration of template %q#D", newdecl
);
1458 error ("conflicts with previous declaration %q+#D", olddecl
);
1460 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1461 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1462 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1463 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1464 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1465 DECL_TEMPLATE_PARMS (olddecl
))
1466 /* Template functions can be disambiguated by
1468 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1469 TREE_TYPE (TREE_TYPE (olddecl
))))
1471 error ("new declaration %q#D", newdecl
);
1472 error ("ambiguates old declaration %q+#D", olddecl
);
1476 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1478 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1480 error ("declaration of C function %q#D conflicts with",
1482 error ("previous declaration %q+#D here", olddecl
);
1485 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1486 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1488 error ("new declaration %q#D", newdecl
);
1489 error ("ambiguates old declaration %q+#D", olddecl
);
1490 return error_mark_node
;
1497 error ("conflicting declaration %q#D", newdecl
);
1498 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1499 return error_mark_node
;
1502 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1503 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1504 && (!DECL_TEMPLATE_INFO (newdecl
)
1505 || (DECL_TI_TEMPLATE (newdecl
)
1506 != DECL_TI_TEMPLATE (olddecl
))))
1507 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1508 && (!DECL_TEMPLATE_INFO (olddecl
)
1509 || (DECL_TI_TEMPLATE (olddecl
)
1510 != DECL_TI_TEMPLATE (newdecl
))))))
1511 /* It's OK to have a template specialization and a non-template
1512 with the same type, or to have specializations of two
1513 different templates with the same type. Note that if one is a
1514 specialization, and the other is an instantiation of the same
1515 template, that we do not exit at this point. That situation
1516 can occur if we instantiate a template class, and then
1517 specialize one of its methods. This situation is valid, but
1518 the declarations must be merged in the usual way. */
1520 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1521 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1522 && !DECL_USE_TEMPLATE (newdecl
))
1523 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1524 && !DECL_USE_TEMPLATE (olddecl
))))
1525 /* One of the declarations is a template instantiation, and the
1526 other is not a template at all. That's OK. */
1528 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1530 /* In [namespace.alias] we have:
1532 In a declarative region, a namespace-alias-definition can be
1533 used to redefine a namespace-alias declared in that declarative
1534 region to refer only to the namespace to which it already
1537 Therefore, if we encounter a second alias directive for the same
1538 alias, we can just ignore the second directive. */
1539 if (DECL_NAMESPACE_ALIAS (newdecl
)
1540 && (DECL_NAMESPACE_ALIAS (newdecl
)
1541 == DECL_NAMESPACE_ALIAS (olddecl
)))
1543 /* [namespace.alias]
1545 A namespace-name or namespace-alias shall not be declared as
1546 the name of any other entity in the same declarative region.
1547 A namespace-name defined at global scope shall not be
1548 declared as the name of any other entity in any global scope
1550 error ("declaration of namespace %qD conflicts with", newdecl
);
1551 error ("previous declaration of namespace %q+D here", olddecl
);
1552 return error_mark_node
;
1556 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1559 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1560 if (DECL_NAME (olddecl
) != NULL_TREE
)
1561 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1562 ? G_("%q+#D previously defined here")
1563 : G_("%q+#D previously declared here"), olddecl
);
1564 return error_mark_node
;
1566 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1567 && DECL_INITIAL (olddecl
) != NULL_TREE
1568 && !prototype_p (TREE_TYPE (olddecl
))
1569 && prototype_p (TREE_TYPE (newdecl
)))
1571 /* Prototype decl follows defn w/o prototype. */
1572 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1573 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1574 "follows non-prototype definition here");
1576 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1577 || TREE_CODE (olddecl
) == VAR_DECL
)
1578 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1581 If two declarations of the same function or object
1582 specify different linkage-specifications ..., the program
1583 is ill-formed.... Except for functions with C++ linkage,
1584 a function declaration without a linkage specification
1585 shall not precede the first linkage specification for
1586 that function. A function can be declared without a
1587 linkage specification after an explicit linkage
1588 specification has been seen; the linkage explicitly
1589 specified in the earlier declaration is not affected by
1590 such a function declaration.
1592 DR 563 raises the question why the restrictions on
1593 functions should not also apply to objects. Older
1594 versions of G++ silently ignore the linkage-specification
1602 which is clearly wrong. Therefore, we now treat objects
1604 if (current_lang_depth () == 0)
1606 /* There is no explicit linkage-specification, so we use
1607 the linkage from the previous declaration. */
1608 if (!DECL_LANG_SPECIFIC (newdecl
))
1609 retrofit_lang_decl (newdecl
);
1610 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1614 error ("previous declaration of %q+#D with %qL linkage",
1615 olddecl
, DECL_LANGUAGE (olddecl
));
1616 error ("conflicts with new declaration with %qL linkage",
1617 DECL_LANGUAGE (newdecl
));
1621 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1623 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1625 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1626 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1629 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1630 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1632 for (; t1
&& t1
!= void_list_node
;
1633 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1634 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1636 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1639 permerror (input_location
, "default argument given for parameter %d of %q#D",
1641 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1645 error ("default argument given for parameter %d of %q#D",
1647 error ("after previous specification in %q+#D",
1654 /* Do not merge an implicit typedef with an explicit one. In:
1658 typedef class A A __attribute__ ((foo));
1660 the attribute should apply only to the typedef. */
1661 if (TREE_CODE (olddecl
) == TYPE_DECL
1662 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1663 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1666 /* If new decl is `static' and an `extern' was seen previously,
1668 warn_extern_redeclared_static (newdecl
, olddecl
);
1670 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1671 return error_mark_node
;
1673 /* We have committed to returning 1 at this point. */
1674 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1676 /* Now that functions must hold information normally held
1677 by field decls, there is extra work to do so that
1678 declaration information does not get destroyed during
1680 if (DECL_VINDEX (olddecl
))
1681 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1682 if (DECL_CONTEXT (olddecl
))
1683 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1684 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1685 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1686 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1687 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1688 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1689 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1690 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1691 SET_OVERLOADED_OPERATOR_CODE
1692 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1693 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1695 /* Optionally warn about more than one declaration for the same
1696 name, but don't warn about a function declaration followed by a
1698 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1699 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1700 /* Don't warn about extern decl followed by definition. */
1701 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1702 /* Don't warn about friends, let add_friend take care of it. */
1703 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1704 /* Don't warn about declaration followed by specialization. */
1705 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1706 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1708 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1709 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1712 if (DECL_DELETED_FN (newdecl
))
1714 error ("deleted definition of %qD", newdecl
);
1715 error ("after previous declaration %q+D", olddecl
);
1717 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1720 /* Deal with C++: must preserve virtual function table size. */
1721 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1723 tree newtype
= TREE_TYPE (newdecl
);
1724 tree oldtype
= TREE_TYPE (olddecl
);
1726 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1727 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1728 CLASSTYPE_FRIEND_CLASSES (newtype
)
1729 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1731 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1734 /* Copy all the DECL_... slots specified in the new decl
1735 except for any that we copy here from the old type. */
1736 DECL_ATTRIBUTES (newdecl
)
1737 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1739 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1743 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1744 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1745 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1746 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1747 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1748 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1750 DECL_ATTRIBUTES (old_result
)
1751 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1753 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1755 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1756 && DECL_INITIAL (new_result
))
1758 if (DECL_INITIAL (old_result
))
1759 DECL_UNINLINABLE (old_result
) = 1;
1761 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1762 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1763 DECL_NOT_REALLY_EXTERN (old_result
)
1764 = DECL_NOT_REALLY_EXTERN (new_result
);
1765 DECL_INTERFACE_KNOWN (old_result
)
1766 = DECL_INTERFACE_KNOWN (new_result
);
1767 DECL_DECLARED_INLINE_P (old_result
)
1768 = DECL_DECLARED_INLINE_P (new_result
);
1769 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1770 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1775 DECL_DECLARED_INLINE_P (old_result
)
1776 |= DECL_DECLARED_INLINE_P (new_result
);
1777 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1778 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1779 check_redeclaration_exception_specification (newdecl
, olddecl
);
1783 /* If the new declaration is a definition, update the file and
1784 line information on the declaration, and also make
1785 the old declaration the same definition. */
1786 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1788 DECL_SOURCE_LOCATION (olddecl
)
1789 = DECL_SOURCE_LOCATION (old_result
)
1790 = DECL_SOURCE_LOCATION (newdecl
);
1791 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1792 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1795 DECL_ARGUMENTS (old_result
)
1796 = DECL_ARGUMENTS (new_result
);
1797 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1798 parm
= DECL_CHAIN (parm
))
1799 DECL_CONTEXT (parm
) = old_result
;
1808 /* Automatically handles default parameters. */
1809 tree oldtype
= TREE_TYPE (olddecl
);
1812 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1813 maybe_instantiate_noexcept (olddecl
);
1815 /* Merge the data types specified in the two decls. */
1816 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1818 /* If merge_types produces a non-typedef type, just use the old type. */
1819 if (TREE_CODE (newdecl
) == TYPE_DECL
1820 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1823 if (TREE_CODE (newdecl
) == VAR_DECL
)
1825 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1826 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1827 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1828 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1829 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1830 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1832 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1833 if (DECL_LANG_SPECIFIC (olddecl
)
1834 && CP_DECL_THREADPRIVATE_P (olddecl
))
1836 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1837 if (!DECL_LANG_SPECIFIC (newdecl
))
1838 retrofit_lang_decl (newdecl
);
1840 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1841 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1845 /* Do this after calling `merge_types' so that default
1846 parameters don't confuse us. */
1847 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1848 check_redeclaration_exception_specification (newdecl
, olddecl
);
1849 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1851 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1852 check_default_args (newdecl
);
1854 /* Lay the type out, unless already done. */
1855 if (! same_type_p (newtype
, oldtype
)
1856 && TREE_TYPE (newdecl
) != error_mark_node
1857 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1858 layout_type (TREE_TYPE (newdecl
));
1860 if ((TREE_CODE (newdecl
) == VAR_DECL
1861 || TREE_CODE (newdecl
) == PARM_DECL
1862 || TREE_CODE (newdecl
) == RESULT_DECL
1863 || TREE_CODE (newdecl
) == FIELD_DECL
1864 || TREE_CODE (newdecl
) == TYPE_DECL
)
1865 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1866 layout_decl (newdecl
, 0);
1868 /* Merge the type qualifiers. */
1869 if (TREE_READONLY (newdecl
))
1870 TREE_READONLY (olddecl
) = 1;
1871 if (TREE_THIS_VOLATILE (newdecl
))
1872 TREE_THIS_VOLATILE (olddecl
) = 1;
1873 if (TREE_NOTHROW (newdecl
))
1874 TREE_NOTHROW (olddecl
) = 1;
1876 /* Merge deprecatedness. */
1877 if (TREE_DEPRECATED (newdecl
))
1878 TREE_DEPRECATED (olddecl
) = 1;
1880 /* Preserve function specific target and optimization options */
1881 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1883 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1884 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1885 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1886 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1888 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1889 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1890 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1891 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1894 /* Merge the initialization information. */
1895 if (DECL_INITIAL (newdecl
) == NULL_TREE
1896 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1898 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1899 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1900 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1902 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1903 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1907 /* Merge the section attribute.
1908 We want to issue an error if the sections conflict but that must be
1909 done later in decl_attributes since we are called before attributes
1911 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1912 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1914 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1916 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1917 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1918 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1919 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1920 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1921 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1922 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1923 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1924 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1925 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1926 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1927 /* Keep the old RTL. */
1928 COPY_DECL_RTL (olddecl
, newdecl
);
1930 else if (TREE_CODE (newdecl
) == VAR_DECL
1931 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1933 /* Keep the old RTL. We cannot keep the old RTL if the old
1934 declaration was for an incomplete object and the new
1935 declaration is not since many attributes of the RTL will
1937 COPY_DECL_RTL (olddecl
, newdecl
);
1940 /* If cannot merge, then use the new type and qualifiers,
1941 and don't preserve the old rtl. */
1944 /* Clean out any memory we had of the old declaration. */
1945 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1947 TREE_VALUE (oldstatic
) = error_mark_node
;
1949 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1950 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1951 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1952 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1955 /* Merge the storage class information. */
1956 merge_weak (newdecl
, olddecl
);
1958 if (DECL_ONE_ONLY (olddecl
))
1959 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
1961 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1962 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1963 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1964 if (! DECL_EXTERNAL (olddecl
))
1965 DECL_EXTERNAL (newdecl
) = 0;
1967 new_template_info
= NULL_TREE
;
1968 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1970 bool new_redefines_gnu_inline
= false;
1972 if (new_defines_function
1973 && ((DECL_INTERFACE_KNOWN (olddecl
)
1974 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1975 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1976 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1977 == FUNCTION_DECL
))))
1981 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1982 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1984 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1987 if (!new_redefines_gnu_inline
)
1989 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1990 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1991 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1993 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1994 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1995 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
1997 /* If the OLDDECL is an instantiation and/or specialization,
1998 then the NEWDECL must be too. But, it may not yet be marked
1999 as such if the caller has created NEWDECL, but has not yet
2000 figured out that it is a redeclaration. */
2001 if (!DECL_USE_TEMPLATE (newdecl
))
2002 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2004 /* Don't really know how much of the language-specific
2005 values we should copy from old to new. */
2006 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2007 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2008 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2009 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2011 if (LANG_DECL_HAS_MIN (newdecl
))
2013 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2014 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2015 if (DECL_TEMPLATE_INFO (newdecl
))
2016 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2017 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2019 /* Only functions have these fields. */
2020 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2021 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
2023 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2024 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2025 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2026 && DECL_HIDDEN_FRIEND_P (olddecl
)
2027 && newdecl_is_friend
);
2028 DECL_BEFRIENDING_CLASSES (newdecl
)
2029 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2030 DECL_BEFRIENDING_CLASSES (olddecl
));
2031 /* DECL_THUNKS is only valid for virtual functions,
2032 otherwise it is a DECL_FRIEND_CONTEXT. */
2033 if (DECL_VIRTUAL_P (newdecl
))
2034 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
2036 /* Only variables have this field. */
2037 else if (TREE_CODE (newdecl
) == VAR_DECL
2038 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2039 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2042 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2046 /* Merge parameter attributes. */
2047 tree oldarg
, newarg
;
2048 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2049 newarg
= DECL_ARGUMENTS(newdecl
);
2051 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2052 DECL_ATTRIBUTES (newarg
)
2053 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2054 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2057 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2058 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2060 /* If newdecl is not a specialization, then it is not a
2061 template-related function at all. And that means that we
2062 should have exited above, returning 0. */
2063 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2065 if (DECL_ODR_USED (olddecl
))
2066 /* From [temp.expl.spec]:
2068 If a template, a member template or the member of a class
2069 template is explicitly specialized then that
2070 specialization shall be declared before the first use of
2071 that specialization that would cause an implicit
2072 instantiation to take place, in every translation unit in
2073 which such a use occurs. */
2074 error ("explicit specialization of %qD after first use",
2077 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2079 /* Don't propagate visibility from the template to the
2080 specialization here. We'll do that in determine_visibility if
2082 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2084 /* [temp.expl.spec/14] We don't inline explicit specialization
2085 just because the primary template says so. */
2087 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2088 the always_inline attribute. */
2089 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2090 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2092 if (DECL_DECLARED_INLINE_P (newdecl
))
2093 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2095 DECL_ATTRIBUTES (newdecl
)
2096 = remove_attribute ("always_inline",
2097 DECL_ATTRIBUTES (newdecl
));
2100 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2102 /* Never inline re-defined extern inline functions.
2103 FIXME: this could be better handled by keeping both
2104 function as separate declarations. */
2105 DECL_UNINLINABLE (newdecl
) = 1;
2109 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2110 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2112 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2114 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2115 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2117 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2118 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2119 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2120 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2123 /* Preserve abstractness on cloned [cd]tors. */
2124 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2126 /* Update newdecl's parms to point at olddecl. */
2127 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2128 parm
= DECL_CHAIN (parm
))
2129 DECL_CONTEXT (parm
) = olddecl
;
2133 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2134 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2135 COPY_DECL_RTL (newdecl
, olddecl
);
2137 if (! types_match
|| new_defines_function
)
2139 /* These need to be copied so that the names are available.
2140 Note that if the types do match, we'll preserve inline
2141 info and other bits, but if not, we won't. */
2142 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2143 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2145 if (new_defines_function
)
2146 /* If defining a function declared with other language
2147 linkage, use the previously declared language linkage. */
2148 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2149 else if (types_match
)
2151 /* If redeclaring a builtin function, and not a definition,
2152 it stays built in. */
2153 if (DECL_BUILT_IN (olddecl
))
2155 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2156 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2157 /* If we're keeping the built-in definition, keep the rtl,
2158 regardless of declaration matches. */
2159 COPY_DECL_RTL (olddecl
, newdecl
);
2160 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2162 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2165 /* If a compatible prototype of these builtin functions
2166 is seen, assume the runtime implements it with the
2167 expected semantics. */
2168 case BUILT_IN_STPCPY
:
2169 if (builtin_decl_explicit_p (fncode
))
2170 set_builtin_decl_implicit_p (fncode
, true);
2178 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2179 /* Don't clear out the arguments if we're just redeclaring a
2181 if (DECL_ARGUMENTS (olddecl
))
2182 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2185 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2186 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2188 /* Now preserve various other info from the definition. */
2189 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2190 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2191 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2192 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2194 /* Warn about conflicting visibility specifications. */
2195 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2196 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2197 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2199 warning_at (input_location
, OPT_Wattributes
,
2200 "%q+D: visibility attribute ignored because it", newdecl
);
2201 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2202 "conflicts with previous declaration here");
2204 /* Choose the declaration which specified visibility. */
2205 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2207 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2208 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2210 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2211 so keep this behavior. */
2212 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2214 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2215 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2217 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2218 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2220 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2221 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2223 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2224 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2225 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2227 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2228 with that from NEWDECL below. */
2229 if (DECL_LANG_SPECIFIC (olddecl
))
2231 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2232 != DECL_LANG_SPECIFIC (newdecl
));
2233 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2236 /* Merge the USED information. */
2237 if (TREE_USED (olddecl
))
2238 TREE_USED (newdecl
) = 1;
2239 else if (TREE_USED (newdecl
))
2240 TREE_USED (olddecl
) = 1;
2241 if (TREE_CODE (newdecl
) == VAR_DECL
)
2243 if (DECL_READ_P (olddecl
))
2244 DECL_READ_P (newdecl
) = 1;
2245 else if (DECL_READ_P (newdecl
))
2246 DECL_READ_P (olddecl
) = 1;
2248 if (DECL_PRESERVE_P (olddecl
))
2249 DECL_PRESERVE_P (newdecl
) = 1;
2250 else if (DECL_PRESERVE_P (newdecl
))
2251 DECL_PRESERVE_P (olddecl
) = 1;
2253 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2257 function_size
= sizeof (struct tree_decl_common
);
2259 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2260 (char *) newdecl
+ sizeof (struct tree_common
),
2261 function_size
- sizeof (struct tree_common
));
2263 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2264 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2265 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2266 if (new_template_info
)
2267 /* If newdecl is a template instantiation, it is possible that
2268 the following sequence of events has occurred:
2270 o A friend function was declared in a class template. The
2271 class template was instantiated.
2273 o The instantiation of the friend declaration was
2274 recorded on the instantiation list, and is newdecl.
2276 o Later, however, instantiate_class_template called pushdecl
2277 on the newdecl to perform name injection. But, pushdecl in
2278 turn called duplicate_decls when it discovered that another
2279 declaration of a global function with the same name already
2282 o Here, in duplicate_decls, we decided to clobber newdecl.
2284 If we're going to do that, we'd better make sure that
2285 olddecl, and not newdecl, is on the list of
2286 instantiations so that if we try to do the instantiation
2287 again we won't get the clobbered declaration. */
2288 reregister_specialization (newdecl
,
2294 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2295 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2296 (char *) newdecl
+ sizeof (struct tree_common
),
2297 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2298 switch (TREE_CODE (olddecl
))
2308 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2309 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2310 size
- sizeof (struct tree_decl_common
)
2311 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2315 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2316 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2317 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2318 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2322 DECL_UID (olddecl
) = olddecl_uid
;
2324 DECL_FRIEND_P (olddecl
) = 1;
2327 DECL_ANTICIPATED (olddecl
) = 1;
2328 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2331 /* NEWDECL contains the merged attribute lists.
2332 Update OLDDECL to be the same. */
2333 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2335 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2336 so that encode_section_info has a chance to look at the new decl
2337 flags and attributes. */
2338 if (DECL_RTL_SET_P (olddecl
)
2339 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2340 || (TREE_CODE (olddecl
) == VAR_DECL
2341 && TREE_STATIC (olddecl
))))
2342 make_decl_rtl (olddecl
);
2344 /* The NEWDECL will no longer be needed. Because every out-of-class
2345 declaration of a member results in a call to duplicate_decls,
2346 freeing these nodes represents in a significant savings. */
2352 /* Return zero if the declaration NEWDECL is valid
2353 when the declaration OLDDECL (assumed to be for the same name)
2354 has already been seen.
2355 Otherwise return an error message format string with a %s
2356 where the identifier should go. */
2359 redeclaration_error_message (tree newdecl
, tree olddecl
)
2361 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2363 /* Because C++ can put things into name space for free,
2364 constructs like "typedef struct foo { ... } foo"
2365 would look like an erroneous redeclaration. */
2366 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2369 return G_("redefinition of %q#D");
2371 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2373 /* If this is a pure function, its olddecl will actually be
2374 the original initialization to `0' (which we force to call
2375 abort()). Don't complain about redefinition in this case. */
2376 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2377 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2380 /* If both functions come from different namespaces, this is not
2381 a redeclaration - this is a conflict with a used function. */
2382 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2383 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2384 && ! decls_match (olddecl
, newdecl
))
2385 return G_("%qD conflicts with used function");
2387 /* We'll complain about linkage mismatches in
2388 warn_extern_redeclared_static. */
2390 /* Defining the same name twice is no good. */
2391 if (DECL_INITIAL (olddecl
) != NULL_TREE
2392 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2394 if (DECL_NAME (olddecl
) == NULL_TREE
)
2395 return G_("%q#D not declared in class");
2396 else if (!GNU_INLINE_P (olddecl
)
2397 || GNU_INLINE_P (newdecl
))
2398 return G_("redefinition of %q#D");
2401 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2403 bool olda
= GNU_INLINE_P (olddecl
);
2404 bool newa
= GNU_INLINE_P (newdecl
);
2409 return G_("%q+D redeclared inline with "
2410 "%<gnu_inline%> attribute");
2412 return G_("%q+D redeclared inline without "
2413 "%<gnu_inline%> attribute");
2419 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2423 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2425 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2426 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2427 return G_("redefinition of %q#D");
2431 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2432 || (DECL_TEMPLATE_RESULT (newdecl
)
2433 == DECL_TEMPLATE_RESULT (olddecl
)))
2436 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2437 if (DECL_TEMPLATE_INFO (nt
))
2438 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2439 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2440 if (DECL_TEMPLATE_INFO (ot
))
2441 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2442 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2443 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2444 return G_("redefinition of %q#D");
2446 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2448 bool olda
= GNU_INLINE_P (ot
);
2449 bool newa
= GNU_INLINE_P (nt
);
2454 return G_("%q+D redeclared inline with "
2455 "%<gnu_inline%> attribute");
2457 return G_("%q+D redeclared inline without "
2458 "%<gnu_inline%> attribute");
2462 /* Core issue #226 (C++0x):
2464 If a friend function template declaration specifies a
2465 default template-argument, that declaration shall be a
2466 definition and shall be the only declaration of the
2467 function template in the translation unit. */
2468 if ((cxx_dialect
!= cxx98
)
2469 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2470 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2471 /*is_primary=*/1, /*is_partial=*/0,
2472 /*is_friend_decl=*/2))
2473 return G_("redeclaration of friend %q#D "
2474 "may not have default template arguments");
2478 else if (TREE_CODE (newdecl
) == VAR_DECL
2479 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2480 && (! DECL_LANG_SPECIFIC (olddecl
)
2481 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2482 || DECL_THREAD_LOCAL_P (newdecl
)))
2484 /* Only variables can be thread-local, and all declarations must
2485 agree on this property. */
2486 if (DECL_THREAD_LOCAL_P (newdecl
))
2487 return G_("thread-local declaration of %q#D follows "
2488 "non-thread-local declaration");
2490 return G_("non-thread-local declaration of %q#D follows "
2491 "thread-local declaration");
2493 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2495 /* The objects have been declared at namespace scope. If either
2496 is a member of an anonymous union, then this is an invalid
2497 redeclaration. For example:
2503 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2504 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2505 return G_("redeclaration of %q#D");
2506 /* If at least one declaration is a reference, there is no
2507 conflict. For example:
2513 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2515 /* Reject two definitions. */
2516 return G_("redefinition of %q#D");
2520 /* Objects declared with block scope: */
2521 /* Reject two definitions, and reject a definition
2522 together with an external reference. */
2523 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2524 return G_("redeclaration of %q#D");
2529 /* Hash and equality functions for the named_label table. */
2532 named_label_entry_hash (const void *data
)
2534 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2535 return DECL_UID (ent
->label_decl
);
2539 named_label_entry_eq (const void *a
, const void *b
)
2541 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2542 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2543 return ent_a
->label_decl
== ent_b
->label_decl
;
2546 /* Create a new label, named ID. */
2549 make_label_decl (tree id
, int local_p
)
2551 struct named_label_entry
*ent
;
2555 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2557 DECL_CONTEXT (decl
) = current_function_decl
;
2558 DECL_MODE (decl
) = VOIDmode
;
2559 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2561 /* Say where one reference is to the label, for the sake of the
2562 error if it is not defined. */
2563 DECL_SOURCE_LOCATION (decl
) = input_location
;
2565 /* Record the fact that this identifier is bound to this label. */
2566 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2568 /* Create the label htab for the function on demand. */
2570 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2571 named_label_entry_eq
, NULL
);
2573 /* Record this label on the list of labels used in this function.
2574 We do this before calling make_label_decl so that we get the
2575 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2576 ent
= ggc_alloc_cleared_named_label_entry ();
2577 ent
->label_decl
= decl
;
2579 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2580 gcc_assert (*slot
== NULL
);
2586 /* Look for a label named ID in the current function. If one cannot
2587 be found, create one. (We keep track of used, but undefined,
2588 labels, and complain about them at the end of a function.) */
2591 lookup_label_1 (tree id
)
2595 /* You can't use labels at global scope. */
2596 if (current_function_decl
== NULL_TREE
)
2598 error ("label %qE referenced outside of any function", id
);
2602 /* See if we've already got this label. */
2603 decl
= IDENTIFIER_LABEL_VALUE (id
);
2604 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2607 decl
= make_label_decl (id
, /*local_p=*/0);
2611 /* Wrapper for lookup_label_1. */
2614 lookup_label (tree id
)
2617 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2618 ret
= lookup_label_1 (id
);
2619 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2623 /* Declare a local label named ID. */
2626 declare_local_label (tree id
)
2629 cp_label_binding
*bind
;
2631 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2632 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2633 bind
= VEC_safe_push (cp_label_binding
, gc
,
2634 current_binding_level
->shadowed_labels
, NULL
);
2635 bind
->prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2637 decl
= make_label_decl (id
, /*local_p=*/1);
2643 /* Returns nonzero if it is ill-formed to jump past the declaration of
2644 DECL. Returns 2 if it's also a real problem. */
2647 decl_jump_unsafe (tree decl
)
2649 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2650 with automatic storage duration is not in scope to a point where it is
2651 in scope is ill-formed unless the variable has scalar type, class type
2652 with a trivial default constructor and a trivial destructor, a
2653 cv-qualified version of one of these types, or an array of one of the
2654 preceding types and is declared without an initializer (8.5). */
2655 tree type
= TREE_TYPE (decl
);
2657 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2658 || type
== error_mark_node
)
2661 type
= strip_array_types (type
);
2663 if (type_has_nontrivial_default_init (TREE_TYPE (decl
))
2664 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2667 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2673 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2676 identify_goto (tree decl
, const location_t
*locus
)
2679 permerror (input_location
, "jump to label %qD", decl
);
2681 permerror (input_location
, "jump to case label");
2683 permerror (*locus
, " from here");
2686 /* Check that a single previously seen jump to a newly defined label
2687 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2688 the jump context; NAMES are the names in scope in LEVEL at the jump
2689 context; LOCUS is the source position of the jump or 0. Returns
2690 true if all is well. */
2693 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2694 bool exited_omp
, const location_t
*locus
)
2696 cp_binding_level
*b
;
2697 bool identified
= false, saw_eh
= false, saw_omp
= false;
2701 identify_goto (decl
, locus
);
2702 error (" exits OpenMP structured block");
2703 identified
= saw_omp
= true;
2706 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2708 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2710 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2711 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2712 : TREE_CHAIN (new_decls
)))
2714 int problem
= decl_jump_unsafe (new_decls
);
2720 identify_goto (decl
, locus
);
2724 error (" crosses initialization of %q+#D", new_decls
);
2726 permerror (input_location
, " enters scope of %q+#D which has "
2727 "non-trivial destructor", new_decls
);
2732 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2736 identify_goto (decl
, locus
);
2739 if (b
->kind
== sk_try
)
2740 error (" enters try block");
2742 error (" enters catch block");
2745 if (b
->kind
== sk_omp
&& !saw_omp
)
2749 identify_goto (decl
, locus
);
2752 error (" enters OpenMP structured block");
2761 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2763 check_previous_goto_1 (decl
, use
->binding_level
,
2764 use
->names_in_scope
, use
->in_omp_scope
,
2765 &use
->o_goto_locus
);
2769 check_switch_goto (cp_binding_level
* level
)
2771 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2774 /* Check that a new jump to a label DECL is OK. Called by
2775 finish_goto_stmt. */
2778 check_goto (tree decl
)
2780 struct named_label_entry
*ent
, dummy
;
2781 bool saw_catch
= false, identified
= false;
2785 /* We can't know where a computed goto is jumping.
2786 So we assume that it's OK. */
2787 if (TREE_CODE (decl
) != LABEL_DECL
)
2790 /* We didn't record any information about this label when we created it,
2791 and there's not much point since it's trivial to analyze as a return. */
2792 if (decl
== cdtor_label
)
2795 dummy
.label_decl
= decl
;
2796 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2797 gcc_assert (ent
!= NULL
);
2799 /* If the label hasn't been defined yet, defer checking. */
2800 if (! DECL_INITIAL (decl
))
2802 struct named_label_use_entry
*new_use
;
2804 /* Don't bother creating another use if the last goto had the
2805 same data, and will therefore create the same set of errors. */
2807 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2810 new_use
= ggc_alloc_named_label_use_entry ();
2811 new_use
->binding_level
= current_binding_level
;
2812 new_use
->names_in_scope
= current_binding_level
->names
;
2813 new_use
->o_goto_locus
= input_location
;
2814 new_use
->in_omp_scope
= false;
2816 new_use
->next
= ent
->uses
;
2817 ent
->uses
= new_use
;
2821 if (ent
->in_try_scope
|| ent
->in_catch_scope
2822 || ent
->in_omp_scope
|| !VEC_empty (tree
, ent
->bad_decls
))
2824 permerror (input_location
, "jump to label %q+D", decl
);
2825 permerror (input_location
, " from here");
2829 FOR_EACH_VEC_ELT (tree
, ent
->bad_decls
, ix
, bad
)
2831 int u
= decl_jump_unsafe (bad
);
2833 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2835 /* Can't skip init of __exception_info. */
2836 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2840 error (" skips initialization of %q+#D", bad
);
2842 permerror (input_location
, " enters scope of %q+#D which has "
2843 "non-trivial destructor", bad
);
2846 if (ent
->in_try_scope
)
2847 error (" enters try block");
2848 else if (ent
->in_catch_scope
&& !saw_catch
)
2849 error (" enters catch block");
2851 if (ent
->in_omp_scope
)
2852 error (" enters OpenMP structured block");
2853 else if (flag_openmp
)
2855 cp_binding_level
*b
;
2856 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2858 if (b
== ent
->binding_level
)
2860 if (b
->kind
== sk_omp
)
2864 permerror (input_location
, "jump to label %q+D", decl
);
2865 permerror (input_location
, " from here");
2868 error (" exits OpenMP structured block");
2875 /* Check that a return is ok wrt OpenMP structured blocks.
2876 Called by finish_return_stmt. Returns true if all is well. */
2879 check_omp_return (void)
2881 cp_binding_level
*b
;
2882 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2883 if (b
->kind
== sk_omp
)
2885 error ("invalid exit from OpenMP structured block");
2888 else if (b
->kind
== sk_function_parms
)
2893 /* Define a label, specifying the location in the source file.
2894 Return the LABEL_DECL node for the label. */
2897 define_label_1 (location_t location
, tree name
)
2899 struct named_label_entry
*ent
, dummy
;
2900 cp_binding_level
*p
;
2903 decl
= lookup_label (name
);
2905 dummy
.label_decl
= decl
;
2906 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2907 gcc_assert (ent
!= NULL
);
2909 /* After labels, make any new cleanups in the function go into their
2910 own new (temporary) binding contour. */
2911 for (p
= current_binding_level
;
2912 p
->kind
!= sk_function_parms
;
2914 p
->more_cleanups_ok
= 0;
2916 if (name
== get_identifier ("wchar_t"))
2917 permerror (input_location
, "label named wchar_t");
2919 if (DECL_INITIAL (decl
) != NULL_TREE
)
2921 error ("duplicate label %qD", decl
);
2922 return error_mark_node
;
2926 struct named_label_use_entry
*use
;
2928 /* Mark label as having been defined. */
2929 DECL_INITIAL (decl
) = error_mark_node
;
2930 /* Say where in the source. */
2931 DECL_SOURCE_LOCATION (decl
) = location
;
2933 ent
->binding_level
= current_binding_level
;
2934 ent
->names_in_scope
= current_binding_level
->names
;
2936 for (use
= ent
->uses
; use
; use
= use
->next
)
2937 check_previous_goto (decl
, use
);
2944 /* Wrapper for define_label_1. */
2947 define_label (location_t location
, tree name
)
2950 timevar_start (TV_NAME_LOOKUP
);
2951 ret
= define_label_1 (location
, name
);
2952 timevar_stop (TV_NAME_LOOKUP
);
2959 cp_binding_level
*level
;
2960 struct cp_switch
*next
;
2961 /* The SWITCH_STMT being built. */
2963 /* A splay-tree mapping the low element of a case range to the high
2964 element, or NULL_TREE if there is no high element. Used to
2965 determine whether or not a new case label duplicates an old case
2966 label. We need a tree, rather than simply a hash table, because
2967 of the GNU case range extension. */
2971 /* A stack of the currently active switch statements. The innermost
2972 switch statement is on the top of the stack. There is no need to
2973 mark the stack for garbage collection because it is only active
2974 during the processing of the body of a function, and we never
2975 collect at that point. */
2977 static struct cp_switch
*switch_stack
;
2979 /* Called right after a switch-statement condition is parsed.
2980 SWITCH_STMT is the switch statement being parsed. */
2983 push_switch (tree switch_stmt
)
2985 struct cp_switch
*p
= XNEW (struct cp_switch
);
2986 p
->level
= current_binding_level
;
2987 p
->next
= switch_stack
;
2988 p
->switch_stmt
= switch_stmt
;
2989 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2996 struct cp_switch
*cs
= switch_stack
;
2997 location_t switch_location
;
2999 /* Emit warnings as needed. */
3000 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3001 if (!processing_template_decl
)
3002 c_do_switch_warnings (cs
->cases
, switch_location
,
3003 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3004 SWITCH_STMT_COND (cs
->switch_stmt
));
3006 splay_tree_delete (cs
->cases
);
3007 switch_stack
= switch_stack
->next
;
3011 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3012 condition. Note that if TYPE and VALUE are already integral we don't
3013 really do the conversion because the language-independent
3014 warning/optimization code will work better that way. */
3017 case_conversion (tree type
, tree value
)
3019 if (value
== NULL_TREE
)
3022 if (cxx_dialect
>= cxx0x
3023 && (SCOPED_ENUM_P (type
)
3024 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3026 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3027 type
= type_promotes_to (type
);
3028 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3030 return cxx_constant_value (value
);
3033 /* Note that we've seen a definition of a case label, and complain if this
3034 is a bad place for one. */
3037 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3040 cp_binding_level
*p
;
3043 if (processing_template_decl
)
3047 /* For templates, just add the case label; we'll do semantic
3048 analysis at instantiation-time. */
3049 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3050 return add_stmt (build_case_label (low_value
, high_value
, label
));
3053 /* Find the condition on which this switch statement depends. */
3054 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3055 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3056 cond
= TREE_VALUE (cond
);
3058 if (!check_switch_goto (switch_stack
->level
))
3059 return error_mark_node
;
3061 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3063 low_value
= case_conversion (type
, low_value
);
3064 high_value
= case_conversion (type
, high_value
);
3066 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3067 low_value
, high_value
);
3069 /* After labels, make any new cleanups in the function go into their
3070 own new (temporary) binding contour. */
3071 for (p
= current_binding_level
;
3072 p
->kind
!= sk_function_parms
;
3074 p
->more_cleanups_ok
= 0;
3079 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3082 typename_hash (const void* k
)
3085 const_tree
const t
= (const_tree
) k
;
3087 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3088 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3093 typedef struct typename_info
{
3101 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3102 really of type `typename_info*' */
3105 typename_compare (const void * k1
, const void * k2
)
3107 const_tree
const t1
= (const_tree
) k1
;
3108 const typename_info
*const t2
= (const typename_info
*) k2
;
3110 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3111 && TYPE_CONTEXT (t1
) == t2
->scope
3112 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3113 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3114 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3117 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3118 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3120 Returns the new TYPENAME_TYPE. */
3122 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3125 build_typename_type (tree context
, tree name
, tree fullname
,
3126 enum tag_types tag_type
)
3134 if (typename_htab
== NULL
)
3135 typename_htab
= htab_create_ggc (61, &typename_hash
,
3136 &typename_compare
, NULL
);
3138 ti
.scope
= FROB_CONTEXT (context
);
3140 ti
.template_id
= fullname
;
3141 ti
.enum_p
= tag_type
== enum_type
;
3142 ti
.class_p
= (tag_type
== class_type
3143 || tag_type
== record_type
3144 || tag_type
== union_type
);
3145 hash
= (htab_hash_pointer (ti
.scope
)
3146 ^ htab_hash_pointer (ti
.name
));
3148 /* See if we already have this type. */
3149 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3154 /* Build the TYPENAME_TYPE. */
3155 t
= cxx_make_type (TYPENAME_TYPE
);
3156 TYPE_CONTEXT (t
) = ti
.scope
;
3157 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3158 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3159 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3161 /* Build the corresponding TYPE_DECL. */
3162 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3163 TYPE_NAME (TREE_TYPE (d
)) = d
;
3164 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3165 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3166 DECL_ARTIFICIAL (d
) = 1;
3168 /* Store it in the hash table. */
3171 /* TYPENAME_TYPEs must always be compared structurally, because
3172 they may or may not resolve down to another type depending on
3173 the currently open classes. */
3174 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3180 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3181 provided to name the type. Returns an appropriate type, unless an
3182 error occurs, in which case error_mark_node is returned. If we
3183 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3184 return that, rather than the _TYPE it corresponds to, in other
3185 cases we look through the type decl. If TF_ERROR is set, complain
3186 about errors, otherwise be quiet. */
3189 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3190 tsubst_flags_t complain
)
3196 if (name
== error_mark_node
3197 || context
== NULL_TREE
3198 || context
== error_mark_node
)
3199 return error_mark_node
;
3203 if (!(TYPE_LANG_SPECIFIC (name
)
3204 && (CLASSTYPE_IS_TEMPLATE (name
)
3205 || CLASSTYPE_USE_TEMPLATE (name
))))
3206 name
= TYPE_IDENTIFIER (name
);
3208 /* Create a TEMPLATE_ID_EXPR for the type. */
3209 name
= build_nt (TEMPLATE_ID_EXPR
,
3210 CLASSTYPE_TI_TEMPLATE (name
),
3211 CLASSTYPE_TI_ARGS (name
));
3213 else if (TREE_CODE (name
) == TYPE_DECL
)
3214 name
= DECL_NAME (name
);
3218 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3220 name
= TREE_OPERAND (name
, 0);
3221 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3222 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3223 else if (TREE_CODE (name
) == OVERLOAD
)
3225 error ("%qD is not a type", name
);
3226 return error_mark_node
;
3229 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3231 error ("%qD used without template parameters", name
);
3232 return error_mark_node
;
3234 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3235 gcc_assert (TYPE_P (context
));
3237 if (!MAYBE_CLASS_TYPE_P (context
))
3239 if (complain
& tf_error
)
3240 error ("%q#T is not a class", context
);
3241 return error_mark_node
;
3244 /* When the CONTEXT is a dependent type, NAME could refer to a
3245 dependent base class of CONTEXT. But look inside it anyway
3246 if CONTEXT is a currently open scope, in case it refers to a
3247 member of the current instantiation or a non-dependent base;
3248 lookup will stop when we hit a dependent base. */
3249 if (!dependent_scope_p (context
))
3250 /* We should only set WANT_TYPE when we're a nested typename type.
3251 Then we can give better diagnostics if we find a non-type. */
3252 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3256 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3257 return build_typename_type (context
, name
, fullname
, tag_type
);
3259 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3263 if (complain
& tf_error
)
3264 error (want_template
? G_("no class template named %q#T in %q#T")
3265 : G_("no type named %q#T in %q#T"), name
, context
);
3266 return error_mark_node
;
3269 /* Pull out the template from an injected-class-name (or multiple). */
3271 t
= maybe_get_template_decl_from_type_decl (t
);
3273 if (TREE_CODE (t
) == TREE_LIST
)
3275 if (complain
& tf_error
)
3277 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3278 print_candidates (t
);
3280 return error_mark_node
;
3283 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3285 if (complain
& tf_error
)
3286 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3288 return error_mark_node
;
3290 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3292 if (complain
& tf_error
)
3293 error ("%<typename %T::%D%> names %q#T, which is not a type",
3295 return error_mark_node
;
3298 if (complain
& tf_error
)
3299 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3301 /* If we are currently parsing a template and if T is a typedef accessed
3302 through CONTEXT then we need to remember and check access of T at
3303 template instantiation time. */
3304 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3307 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3309 /*entering_scope=*/0,
3310 tf_warning_or_error
| tf_user
);
3312 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3318 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3319 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3320 in which case error_mark_node is returned.
3322 If PARM_LIST is non-NULL, also make sure that the template parameter
3323 list of TEMPLATE_DECL matches.
3325 If COMPLAIN zero, don't complain about any errors that occur. */
3328 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3329 tsubst_flags_t complain
)
3335 name
= TYPE_IDENTIFIER (name
);
3336 else if (DECL_P (name
))
3337 name
= DECL_NAME (name
);
3338 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3340 if (!dependent_type_p (context
)
3341 || currently_open_class (context
))
3343 tree tmpl
= NULL_TREE
;
3345 if (MAYBE_CLASS_TYPE_P (context
))
3346 tmpl
= lookup_field (context
, name
, 0, false);
3348 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3349 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3351 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3353 if (complain
& tf_error
)
3354 error ("no class template named %q#T in %q#T", name
, context
);
3355 return error_mark_node
;
3359 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3361 if (complain
& tf_error
)
3363 error ("template parameters do not match template");
3364 error ("%q+D declared here", tmpl
);
3366 return error_mark_node
;
3369 if (complain
& tf_error
)
3370 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3375 /* Build the UNBOUND_CLASS_TEMPLATE. */
3376 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3377 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3378 TREE_TYPE (t
) = NULL_TREE
;
3379 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3381 /* Build the corresponding TEMPLATE_DECL. */
3382 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3383 TYPE_NAME (TREE_TYPE (d
)) = d
;
3384 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3385 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3386 DECL_ARTIFICIAL (d
) = 1;
3387 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3394 /* Push the declarations of builtin types into the namespace.
3395 RID_INDEX is the index of the builtin type in the array
3396 RID_POINTERS. NAME is the name used when looking up the builtin
3397 type. TYPE is the _TYPE node for the builtin type. */
3400 record_builtin_type (enum rid rid_index
,
3404 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3405 tree tdecl
= NULL_TREE
;
3407 if ((int) rid_index
< (int) RID_MAX
)
3408 rname
= ridpointers
[(int) rid_index
];
3410 tname
= get_identifier (name
);
3412 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3413 eliminated. Built-in types should not be looked up name; their
3414 names are keywords that the parser can recognize. However, there
3415 is code in c-common.c that uses identifier_global_value to look
3416 up built-in types by name. */
3419 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3420 DECL_ARTIFICIAL (tdecl
) = 1;
3421 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3427 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3428 DECL_ARTIFICIAL (tdecl
) = 1;
3430 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3433 if (!TYPE_NAME (type
))
3434 TYPE_NAME (type
) = tdecl
;
3437 debug_hooks
->type_decl (tdecl
, 0);
3440 /* Record one of the standard Java types.
3441 * Declare it as having the given NAME.
3442 * If SIZE > 0, it is the size of one of the integral types;
3443 * otherwise it is the negative of the size of one of the other types. */
3446 record_builtin_java_type (const char* name
, int size
)
3451 type
= build_nonstandard_integer_type (size
, 0);
3452 type
= build_distinct_type_copy (type
);
3454 else if (size
> -32)
3457 /* "__java_char" or ""__java_boolean". */
3458 type
= build_nonstandard_integer_type (-size
, 1);
3459 type
= build_distinct_type_copy (type
);
3460 /* Get the signed type cached and attached to the unsigned type,
3461 so it doesn't get garbage-collected at "random" times,
3462 causing potential codegen differences out of different UIDs
3463 and different alias set numbers. */
3464 stype
= build_nonstandard_integer_type (-size
, 0);
3465 stype
= build_distinct_type_copy (stype
);
3466 TREE_CHAIN (type
) = stype
;
3467 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3470 { /* "__java_float" or ""__java_double". */
3471 type
= make_node (REAL_TYPE
);
3472 TYPE_PRECISION (type
) = - size
;
3475 record_builtin_type (RID_MAX
, name
, type
);
3476 decl
= TYPE_NAME (type
);
3478 /* Suppress generate debug symbol entries for these types,
3479 since for normal C++ they are just clutter.
3480 However, push_lang_context undoes this if extern "Java" is seen. */
3481 DECL_IGNORED_P (decl
) = 1;
3483 TYPE_FOR_JAVA (type
) = 1;
3487 /* Push a type into the namespace so that the back ends ignore it. */
3490 record_unknown_type (tree type
, const char* name
)
3492 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3493 TYPE_DECL
, get_identifier (name
), type
));
3494 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3495 DECL_IGNORED_P (decl
) = 1;
3496 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3497 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3498 TYPE_ALIGN (type
) = 1;
3499 TYPE_USER_ALIGN (type
) = 0;
3500 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3503 /* A string for which we should create an IDENTIFIER_NODE at
3506 typedef struct predefined_identifier
3508 /* The name of the identifier. */
3509 const char *const name
;
3510 /* The place where the IDENTIFIER_NODE should be stored. */
3512 /* Nonzero if this is the name of a constructor or destructor. */
3513 const int ctor_or_dtor_p
;
3514 } predefined_identifier
;
3516 /* Create all the predefined identifiers. */
3519 initialize_predefined_identifiers (void)
3521 const predefined_identifier
*pid
;
3523 /* A table of identifiers to create at startup. */
3524 static const predefined_identifier predefined_identifiers
[] = {
3525 { "C++", &lang_name_cplusplus
, 0 },
3526 { "C", &lang_name_c
, 0 },
3527 { "Java", &lang_name_java
, 0 },
3528 /* Some of these names have a trailing space so that it is
3529 impossible for them to conflict with names written by users. */
3530 { "__ct ", &ctor_identifier
, 1 },
3531 { "__base_ctor ", &base_ctor_identifier
, 1 },
3532 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3533 { "__dt ", &dtor_identifier
, 1 },
3534 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3535 { "__base_dtor ", &base_dtor_identifier
, 1 },
3536 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3537 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3538 { "nelts", &nelts_identifier
, 0 },
3539 { THIS_NAME
, &this_identifier
, 0 },
3540 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3541 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3542 { "_vptr", &vptr_identifier
, 0 },
3543 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3544 { "::", &global_scope_name
, 0 },
3545 { "std", &std_identifier
, 0 },
3549 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3551 *pid
->node
= get_identifier (pid
->name
);
3552 if (pid
->ctor_or_dtor_p
)
3553 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3557 /* Create the predefined scalar types of C,
3558 and some nodes representing standard constants (0, 1, (void *)0).
3559 Initialize the global binding level.
3560 Make definitions for built-in primitive functions. */
3563 cxx_init_decl_processing (void)
3566 tree void_ftype_ptr
;
3568 /* Create all the identifiers we need. */
3569 initialize_predefined_identifiers ();
3571 /* Create the global variables. */
3572 push_to_top_level ();
3574 current_function_decl
= NULL_TREE
;
3575 current_binding_level
= NULL
;
3576 /* Enter the global namespace. */
3577 gcc_assert (global_namespace
== NULL_TREE
);
3578 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3580 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3581 TREE_PUBLIC (global_namespace
) = 1;
3582 begin_scope (sk_namespace
, global_namespace
);
3584 if (flag_visibility_ms_compat
)
3585 default_visibility
= VISIBILITY_HIDDEN
;
3588 current_lang_name
= lang_name_c
;
3590 /* Create the `std' namespace. */
3591 push_namespace (std_identifier
);
3592 std_node
= current_namespace
;
3595 c_common_nodes_and_builtins ();
3597 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3598 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3599 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3600 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3601 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3602 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3603 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3604 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3606 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3608 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3609 truthvalue_type_node
= boolean_type_node
;
3610 truthvalue_false_node
= boolean_false_node
;
3611 truthvalue_true_node
= boolean_true_node
;
3613 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3614 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3615 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3618 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3621 delta_type_node
= ptrdiff_type_node
;
3622 vtable_index_type
= ptrdiff_type_node
;
3624 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3625 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3626 void_ftype_ptr
= build_function_type_list (void_type_node
,
3627 ptr_type_node
, NULL_TREE
);
3629 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3631 /* C++ extensions */
3633 unknown_type_node
= make_node (LANG_TYPE
);
3634 record_unknown_type (unknown_type_node
, "unknown type");
3636 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3637 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3639 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3641 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3642 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3644 init_list_type_node
= make_node (LANG_TYPE
);
3645 record_unknown_type (init_list_type_node
, "init list");
3647 dependent_lambda_return_type_node
= make_node (LANG_TYPE
);
3648 record_unknown_type (dependent_lambda_return_type_node
,
3649 "undeduced lambda return type");
3652 /* Make sure we get a unique function type, so we can give
3653 its pointer type a name. (This wins for gdb.) */
3654 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3655 TREE_TYPE (vfunc_type
) = integer_type_node
;
3656 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3657 layout_type (vfunc_type
);
3659 vtable_entry_type
= build_pointer_type (vfunc_type
);
3661 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3664 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3665 layout_type (vtbl_type_node
);
3666 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3667 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3668 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3669 layout_type (vtbl_ptr_type_node
);
3670 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3672 push_namespace (get_identifier ("__cxxabiv1"));
3673 abi_node
= current_namespace
;
3676 global_type_node
= make_node (LANG_TYPE
);
3677 record_unknown_type (global_type_node
, "global type");
3680 current_lang_name
= lang_name_cplusplus
;
3683 tree newattrs
, extvisattr
;
3684 tree newtype
, deltype
;
3685 tree ptr_ftype_sizetype
;
3689 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3690 if (cxx_dialect
== cxx98
)
3693 tree bad_alloc_type_node
;
3694 tree bad_alloc_decl
;
3696 push_namespace (std_identifier
);
3697 bad_alloc_id
= get_identifier ("bad_alloc");
3698 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3699 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3701 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3702 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3706 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3709 new_eh_spec
= noexcept_false_spec
;
3711 /* Ensure attribs.c is initialized. */
3713 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3715 newattrs
= tree_cons (get_identifier ("alloc_size"),
3716 build_tree_list (NULL_TREE
, integer_one_node
),
3718 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3719 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3720 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3721 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3722 push_cp_library_fn (NEW_EXPR
, newtype
);
3723 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3724 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3725 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3727 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3728 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3729 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3730 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3731 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3732 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3733 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3734 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3738 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3740 /* Perform other language dependent initializations. */
3741 init_class_processing ();
3742 init_rtti_processing ();
3743 init_template_processing ();
3745 if (flag_exceptions
)
3746 init_exception_processing ();
3748 if (! supports_one_only ())
3751 make_fname_decl
= cp_make_fname_decl
;
3752 start_fname_decls ();
3754 /* Show we use EH for cleanups. */
3755 if (flag_exceptions
)
3756 using_eh_for_cleanups ();
3759 /* Generate an initializer for a function naming variable from
3760 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3761 filled in with the type of the init. */
3764 cp_fname_init (const char* name
, tree
*type_p
)
3766 tree domain
= NULL_TREE
;
3768 tree init
= NULL_TREE
;
3773 length
= strlen (name
);
3774 domain
= build_index_type (size_int (length
));
3775 init
= build_string (length
+ 1, name
);
3778 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3779 type
= build_cplus_array_type (type
, domain
);
3784 TREE_TYPE (init
) = type
;
3786 init
= error_mark_node
;
3791 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3792 the decl, LOC is the location to give the decl, NAME is the
3793 initialization string and TYPE_DEP indicates whether NAME depended
3794 on the type of the function. We make use of that to detect
3795 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3796 at the point of first use, so we mustn't push the decl now. */
3799 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3801 const char *const name
= (type_dep
&& processing_template_decl
3802 ? NULL
: fname_as_string (type_dep
));
3804 tree init
= cp_fname_init (name
, &type
);
3805 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3808 free (CONST_CAST (char *, name
));
3810 /* As we're using pushdecl_with_scope, we must set the context. */
3811 DECL_CONTEXT (decl
) = current_function_decl
;
3812 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3814 TREE_STATIC (decl
) = 1;
3815 TREE_READONLY (decl
) = 1;
3816 DECL_ARTIFICIAL (decl
) = 1;
3818 TREE_USED (decl
) = 1;
3820 if (current_function_decl
)
3822 cp_binding_level
*b
= current_binding_level
;
3823 if (b
->kind
== sk_function_parms
)
3824 return error_mark_node
;
3825 while (b
->level_chain
->kind
!= sk_function_parms
)
3827 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3828 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3829 LOOKUP_ONLYCONVERTING
);
3833 DECL_THIS_STATIC (decl
) = true;
3834 pushdecl_top_level_and_finish (decl
, init
);
3841 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3843 tree id
= DECL_NAME (decl
);
3844 const char *name
= IDENTIFIER_POINTER (id
);
3846 retrofit_lang_decl (decl
);
3848 DECL_ARTIFICIAL (decl
) = 1;
3849 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3850 SET_DECL_LANGUAGE (decl
, lang_c
);
3851 /* Runtime library routines are, by definition, available in an
3852 external shared object. */
3853 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3854 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3856 DECL_CONTEXT (decl
) = context
;
3859 pushdecl_top_level (decl
);
3863 /* A function in the user's namespace should have an explicit
3864 declaration before it is used. Mark the built-in function as
3865 anticipated but not actually declared. */
3866 if (name
[0] != '_' || name
[1] != '_')
3867 DECL_ANTICIPATED (decl
) = 1;
3868 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3870 size_t len
= strlen (name
);
3872 /* Treat __*_chk fortification functions as anticipated as well,
3873 unless they are __builtin_*. */
3874 if (len
> strlen ("___chk")
3875 && memcmp (name
+ len
- strlen ("_chk"),
3876 "_chk", strlen ("_chk") + 1) == 0)
3877 DECL_ANTICIPATED (decl
) = 1;
3884 cxx_builtin_function (tree decl
)
3886 tree id
= DECL_NAME (decl
);
3887 const char *name
= IDENTIFIER_POINTER (id
);
3888 /* All builtins that don't begin with an '_' should additionally
3889 go in the 'std' namespace. */
3892 tree decl2
= copy_node(decl
);
3893 push_namespace (std_identifier
);
3894 builtin_function_1 (decl2
, std_node
, false);
3898 return builtin_function_1 (decl
, NULL_TREE
, false);
3901 /* Like cxx_builtin_function, but guarantee the function is added to the global
3902 scope. This is to allow function specific options to add new machine
3903 dependent builtins when the target ISA changes via attribute((target(...)))
3904 which saves space on program startup if the program does not use non-generic
3908 cxx_builtin_function_ext_scope (tree decl
)
3911 tree id
= DECL_NAME (decl
);
3912 const char *name
= IDENTIFIER_POINTER (id
);
3913 /* All builtins that don't begin with an '_' should additionally
3914 go in the 'std' namespace. */
3917 tree decl2
= copy_node(decl
);
3918 push_namespace (std_identifier
);
3919 builtin_function_1 (decl2
, std_node
, true);
3923 return builtin_function_1 (decl
, NULL_TREE
, true);
3926 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3927 function. Not called directly. */
3930 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3932 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3933 DECL_EXTERNAL (fn
) = 1;
3934 TREE_PUBLIC (fn
) = 1;
3935 DECL_ARTIFICIAL (fn
) = 1;
3936 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3937 SET_DECL_LANGUAGE (fn
, lang_c
);
3938 /* Runtime library routines are, by definition, available in an
3939 external shared object. */
3940 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3941 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3945 /* Returns the _DECL for a library function with C linkage.
3946 We assume that such functions never throw; if this is incorrect,
3947 callers should unset TREE_NOTHROW. */
3950 build_library_fn (tree name
, tree type
)
3952 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3953 TREE_NOTHROW (fn
) = 1;
3957 /* Returns the _DECL for a library function with C++ linkage. */
3960 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3962 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3963 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3964 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3965 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3969 /* Like build_library_fn, but takes a C string instead of an
3973 build_library_fn_ptr (const char* name
, tree type
)
3975 return build_library_fn (get_identifier (name
), type
);
3978 /* Like build_cp_library_fn, but takes a C string instead of an
3982 build_cp_library_fn_ptr (const char* name
, tree type
)
3984 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3987 /* Like build_library_fn, but also pushes the function so that we will
3988 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3989 may throw exceptions listed in RAISES. */
3992 push_library_fn (tree name
, tree type
, tree raises
)
3997 type
= build_exception_variant (type
, raises
);
3999 fn
= build_library_fn (name
, type
);
4000 pushdecl_top_level (fn
);
4004 /* Like build_cp_library_fn, but also pushes the function so that it
4005 will be found by normal lookup. */
4008 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4010 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4015 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4019 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4023 push_void_library_fn (tree name
, tree parmtypes
)
4025 tree type
= build_function_type (void_type_node
, parmtypes
);
4026 return push_library_fn (name
, type
, NULL_TREE
);
4029 /* Like push_library_fn, but also note that this function throws
4030 and does not return. Used for __throw_foo and the like. */
4033 push_throw_library_fn (tree name
, tree type
)
4035 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4036 TREE_THIS_VOLATILE (fn
) = 1;
4037 TREE_NOTHROW (fn
) = 0;
4041 /* When we call finish_struct for an anonymous union, we create
4042 default copy constructors and such. But, an anonymous union
4043 shouldn't have such things; this function undoes the damage to the
4044 anonymous union type T.
4046 (The reason that we create the synthesized methods is that we don't
4047 distinguish `union { int i; }' from `typedef union { int i; } U'.
4048 The first is an anonymous union; the second is just an ordinary
4052 fixup_anonymous_aggr (tree t
)
4056 /* Wipe out memory of synthesized methods. */
4057 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4058 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4059 TYPE_HAS_COPY_CTOR (t
) = 0;
4060 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4061 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4062 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4064 /* Splice the implicitly generated functions out of the TYPE_METHODS
4066 q
= &TYPE_METHODS (t
);
4069 if (DECL_ARTIFICIAL (*q
))
4070 *q
= TREE_CHAIN (*q
);
4072 q
= &DECL_CHAIN (*q
);
4075 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4076 if (TYPE_METHODS (t
))
4078 tree decl
= TYPE_MAIN_DECL (t
);
4080 if (TREE_CODE (t
) != UNION_TYPE
)
4081 error_at (DECL_SOURCE_LOCATION (decl
),
4082 "an anonymous struct cannot have function members");
4084 error_at (DECL_SOURCE_LOCATION (decl
),
4085 "an anonymous union cannot have function members");
4088 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4089 assignment operators (because they cannot have these methods themselves).
4090 For anonymous unions this is already checked because they are not allowed
4091 in any union, otherwise we have to check it. */
4092 if (TREE_CODE (t
) != UNION_TYPE
)
4096 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4097 if (TREE_CODE (field
) == FIELD_DECL
)
4099 type
= TREE_TYPE (field
);
4100 if (CLASS_TYPE_P (type
))
4102 if (TYPE_NEEDS_CONSTRUCTING (type
))
4103 error ("member %q+#D with constructor not allowed "
4104 "in anonymous aggregate", field
);
4105 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4106 error ("member %q+#D with destructor not allowed "
4107 "in anonymous aggregate", field
);
4108 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4109 error ("member %q+#D with copy assignment operator "
4110 "not allowed in anonymous aggregate", field
);
4116 /* Make sure that a declaration with no declarator is well-formed, i.e.
4117 just declares a tagged type or anonymous union.
4119 Returns the type declared; or NULL_TREE if none. */
4122 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
4124 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
4125 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
4126 /* If a class, struct, or enum type is declared by the DECLSPECS
4127 (i.e, if a class-specifier, enum-specifier, or non-typename
4128 elaborated-type-specifier appears in the DECLSPECS),
4129 DECLARED_TYPE is set to the corresponding type. */
4130 tree declared_type
= NULL_TREE
;
4131 bool error_p
= false;
4133 if (declspecs
->multiple_types_p
)
4134 error ("multiple types in one declaration");
4135 else if (declspecs
->redefined_builtin_type
)
4137 if (!in_system_header
)
4138 permerror (input_location
, "redeclaration of C++ built-in type %qT",
4139 declspecs
->redefined_builtin_type
);
4144 && TYPE_P (declspecs
->type
)
4145 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4146 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4147 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4148 declared_type
= declspecs
->type
;
4149 else if (declspecs
->type
== error_mark_node
)
4151 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4152 permerror (input_location
, "declaration does not declare anything");
4153 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4155 error ("%<auto%> can only be specified for variables "
4156 "or function declarations");
4157 return error_mark_node
;
4159 /* Check for an anonymous union. */
4160 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4161 && TYPE_ANONYMOUS_P (declared_type
))
4163 /* 7/3 In a simple-declaration, the optional init-declarator-list
4164 can be omitted only when declaring a class (clause 9) or
4165 enumeration (7.2), that is, when the decl-specifier-seq contains
4166 either a class-specifier, an elaborated-type-specifier with
4167 a class-key (9.1), or an enum-specifier. In these cases and
4168 whenever a class-specifier or enum-specifier is present in the
4169 decl-specifier-seq, the identifiers in these specifiers are among
4170 the names being declared by the declaration (as class-name,
4171 enum-names, or enumerators, depending on the syntax). In such
4172 cases, and except for the declaration of an unnamed bit-field (9.6),
4173 the decl-specifier-seq shall introduce one or more names into the
4174 program, or shall redeclare a name introduced by a previous
4175 declaration. [Example:
4176 enum { }; // ill-formed
4177 typedef class { }; // ill-formed
4181 error ("missing type-name in typedef-declaration");
4184 /* Anonymous unions are objects, so they can have specifiers. */;
4185 SET_ANON_AGGR_TYPE_P (declared_type
);
4187 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4188 pedwarn (input_location
, OPT_pedantic
, "ISO C++ prohibits anonymous structs");
4193 if (declspecs
->specs
[(int)ds_inline
]
4194 || declspecs
->specs
[(int)ds_virtual
])
4195 error ("%qs can only be specified for functions",
4196 declspecs
->specs
[(int)ds_inline
]
4197 ? "inline" : "virtual");
4199 && (!current_class_type
4200 || current_scope () != current_class_type
))
4201 error ("%<friend%> can only be specified inside a class");
4202 else if (declspecs
->specs
[(int)ds_explicit
])
4203 error ("%<explicit%> can only be specified for constructors");
4204 else if (declspecs
->storage_class
)
4205 error ("a storage class can only be specified for objects "
4207 else if (declspecs
->specs
[(int)ds_const
]
4208 || declspecs
->specs
[(int)ds_volatile
]
4209 || declspecs
->specs
[(int)ds_restrict
]
4210 || declspecs
->specs
[(int)ds_thread
])
4211 error ("qualifiers can only be specified for objects "
4213 else if (saw_typedef
)
4214 warning (0, "%<typedef%> was ignored in this declaration");
4215 else if (declspecs
->specs
[(int) ds_constexpr
])
4216 error ("%<constexpr%> cannot be used for type declarations");
4219 return declared_type
;
4222 /* Called when a declaration is seen that contains no names to declare.
4223 If its type is a reference to a structure, union or enum inherited
4224 from a containing scope, shadow that tag name for the current scope
4225 with a forward reference.
4226 If its type defines a new named structure or union
4227 or defines an enum, it is valid but we need not do anything here.
4228 Otherwise, it is an error.
4230 C++: may have to grok the declspecs to learn about static,
4231 complain for anonymous unions.
4233 Returns the TYPE declared -- or NULL_TREE if none. */
4236 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4238 tree t
= check_tag_decl (declspecs
);
4243 if (declspecs
->attributes
)
4245 warning (0, "attribute ignored in declaration of %q+#T", t
);
4246 warning (0, "attribute for %q+#T must follow the %qs keyword",
4247 t
, class_key_or_enum_as_string (t
));
4251 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4254 /* This is where the variables in an anonymous union are
4255 declared. An anonymous union declaration looks like:
4257 because there is no declarator after the union, the parser
4258 sends that declaration here. */
4259 if (ANON_AGGR_TYPE_P (t
))
4261 fixup_anonymous_aggr (t
);
4263 if (TYPE_FIELDS (t
))
4265 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4266 declspecs
, NORMAL
, 0, NULL
);
4267 finish_anon_union (decl
);
4274 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4277 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4278 const cp_declarator
*declarator
,
4279 bool is_template_arg
)
4283 enum decl_context context
4284 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4285 attrs
= type_specifiers
->attributes
;
4286 type_specifiers
->attributes
= NULL_TREE
;
4287 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4288 if (attrs
&& type
!= error_mark_node
)
4290 if (CLASS_TYPE_P (type
))
4291 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4292 "outside of definition", type
);
4293 else if (MAYBE_CLASS_TYPE_P (type
))
4294 /* A template type parameter or other dependent type. */
4295 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4296 "type %qT without an associated declaration", type
);
4298 cplus_decl_attributes (&type
, attrs
, 0);
4303 /* Process a DECLARATOR for a function-scope variable declaration,
4304 namespace-scope variable declaration, or function declaration.
4305 (Function definitions go through start_function; class member
4306 declarations appearing in the body of the class go through
4307 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4308 If an error occurs, the error_mark_node is returned instead.
4310 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4311 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4312 for an explicitly defaulted function, or SD_DELETED for an explicitly
4313 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4314 implicitly initialized via a default constructor. ATTRIBUTES and
4315 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4317 The scope represented by the context of the returned DECL is pushed
4318 (if it is not the global namespace) and is assigned to
4319 *PUSHED_SCOPE_P. The caller is then responsible for calling
4320 pop_scope on *PUSHED_SCOPE_P if it is set. */
4323 start_decl (const cp_declarator
*declarator
,
4324 cp_decl_specifier_seq
*declspecs
,
4327 tree prefix_attributes
,
4328 tree
*pushed_scope_p
)
4336 *pushed_scope_p
= NULL_TREE
;
4338 /* An object declared as __attribute__((deprecated)) suppresses
4339 warnings of uses of other deprecated items. */
4340 if (lookup_attribute ("deprecated", attributes
))
4341 deprecated_state
= DEPRECATED_SUPPRESS
;
4343 attributes
= chainon (attributes
, prefix_attributes
);
4345 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4348 deprecated_state
= DEPRECATED_NORMAL
;
4350 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4351 || decl
== error_mark_node
)
4352 return error_mark_node
;
4354 context
= CP_DECL_CONTEXT (decl
);
4355 if (context
!= global_namespace
)
4356 *pushed_scope_p
= push_scope (context
);
4359 /* Is it valid for this decl to have an initializer at all?
4360 If not, set INITIALIZED to zero, which will indirectly
4361 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4362 switch (TREE_CODE (decl
))
4365 error ("typedef %qD is initialized (use decltype instead)", decl
);
4366 return error_mark_node
;
4369 if (initialized
== SD_DELETED
)
4370 /* We'll handle the rest of the semantics later, but we need to
4371 set this now so it's visible to duplicate_decls. */
4372 DECL_DELETED_FN (decl
) = 1;
4381 if (! toplevel_bindings_p ()
4382 && DECL_EXTERNAL (decl
))
4383 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4385 DECL_EXTERNAL (decl
) = 0;
4386 if (toplevel_bindings_p ())
4387 TREE_STATIC (decl
) = 1;
4389 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4391 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4392 record_key_method_defined (decl
);
4394 /* If this is a typedef that names the class for linkage purposes
4395 (7.1.3p8), apply any attributes directly to the type. */
4396 if (TREE_CODE (decl
) == TYPE_DECL
4397 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4398 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4399 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4403 /* Set attributes here so if duplicate decl, will have proper attributes. */
4404 cplus_decl_attributes (&decl
, attributes
, flags
);
4406 /* Dllimported symbols cannot be defined. Static data members (which
4407 can be initialized in-class and dllimported) go through grokfield,
4408 not here, so we don't need to exclude those decls when checking for
4410 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4412 error ("definition of %q#D is marked %<dllimport%>", decl
);
4413 DECL_DLLIMPORT_P (decl
) = 0;
4416 /* If #pragma weak was used, mark the decl weak now. */
4417 maybe_apply_pragma_weak (decl
);
4419 if (TREE_CODE (decl
) == FUNCTION_DECL
4420 && DECL_DECLARED_INLINE_P (decl
)
4421 && DECL_UNINLINABLE (decl
)
4422 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4423 warning (0, "inline function %q+D given attribute noinline", decl
);
4425 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4427 if (TREE_CODE (decl
) == VAR_DECL
)
4429 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4430 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4431 error ("%q#D is not a static member of %q#T", decl
, context
);
4434 if (DECL_CONTEXT (field
) != context
)
4436 if (!same_type_p (DECL_CONTEXT (field
), context
))
4437 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4438 "to be defined as %<%T::%D%>",
4439 DECL_CONTEXT (field
), DECL_NAME (decl
),
4440 context
, DECL_NAME (decl
));
4441 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4443 if (processing_specialization
4444 && template_class_depth (context
) == 0
4445 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4446 error ("template header not allowed in member definition "
4447 "of explicitly specialized class");
4448 /* Static data member are tricky; an in-class initialization
4449 still doesn't provide a definition, so the in-class
4450 declaration will have DECL_EXTERNAL set, but will have an
4451 initialization. Thus, duplicate_decls won't warn
4452 about this situation, and so we check here. */
4453 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4454 error ("duplicate initialization of %qD", decl
);
4455 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4457 if (declspecs
->specs
[(int) ds_constexpr
]
4458 && !DECL_DECLARED_CONSTEXPR_P (field
))
4459 error ("%qD declared %<constexpr%> outside its class", field
);
4464 tree field
= check_classfn (context
, decl
,
4465 (processing_template_decl
4466 > template_class_depth (context
))
4467 ? current_template_parms
4469 if (field
&& field
!= error_mark_node
4470 && duplicate_decls (decl
, field
,
4471 /*newdecl_is_friend=*/false))
4475 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4476 DECL_IN_AGGR_P (decl
) = 0;
4477 /* Do not mark DECL as an explicit specialization if it was not
4478 already marked as an instantiation; a declaration should
4479 never be marked as a specialization unless we know what
4480 template is being specialized. */
4481 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4483 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4485 /* [temp.expl.spec] An explicit specialization of a static data
4486 member of a template is a definition if the declaration
4487 includes an initializer; otherwise, it is a declaration.
4489 We check for processing_specialization so this only applies
4490 to the new specialization syntax. */
4491 if (!initialized
&& processing_specialization
)
4492 DECL_EXTERNAL (decl
) = 1;
4495 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4496 /* Aliases are definitions. */
4498 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4502 was_public
= TREE_PUBLIC (decl
);
4504 /* Enter this declaration into the symbol table. */
4505 decl
= maybe_push_decl (decl
);
4507 if (processing_template_decl
)
4508 decl
= push_template_decl (decl
);
4509 if (decl
== error_mark_node
)
4510 return error_mark_node
;
4512 /* Tell the back end to use or not use .common as appropriate. If we say
4513 -fconserve-space, we want this to save .data space, at the expense of
4514 wrong semantics. If we say -fno-conserve-space, we want this to
4515 produce errors about redefs; to do this we force variables into the
4517 if (flag_conserve_space
4518 && TREE_CODE (decl
) == VAR_DECL
4519 && TREE_PUBLIC (decl
)
4520 && !DECL_THREAD_LOCAL_P (decl
)
4521 && !have_global_bss_p ())
4522 DECL_COMMON (decl
) = 1;
4524 if (TREE_CODE (decl
) == VAR_DECL
4525 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4526 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4528 /* This is a const variable with implicit 'static'. Set
4529 DECL_THIS_STATIC so we can tell it from variables that are
4530 !TREE_PUBLIC because of the anonymous namespace. */
4531 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4532 DECL_THIS_STATIC (decl
) = 1;
4535 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4536 start_decl_1 (decl
, initialized
);
4541 /* Process the declaration of a variable DECL. INITIALIZED is true
4542 iff DECL is explicitly initialized. (INITIALIZED is false if the
4543 variable is initialized via an implicitly-called constructor.)
4544 This function must be called for ordinary variables (including, for
4545 example, implicit instantiations of templates), but must not be
4546 called for template declarations. */
4549 start_decl_1 (tree decl
, bool initialized
)
4553 bool aggregate_definition_p
;
4555 gcc_assert (!processing_template_decl
);
4557 if (error_operand_p (decl
))
4560 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4562 type
= TREE_TYPE (decl
);
4563 complete_p
= COMPLETE_TYPE_P (type
);
4564 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4566 /* If an explicit initializer is present, or if this is a definition
4567 of an aggregate, then we need a complete type at this point.
4568 (Scalars are always complete types, so there is nothing to
4569 check.) This code just sets COMPLETE_P; errors (if necessary)
4570 are issued below. */
4571 if ((initialized
|| aggregate_definition_p
)
4573 && COMPLETE_TYPE_P (complete_type (type
)))
4576 /* We will not yet have set TREE_READONLY on DECL if the type
4577 was "const", but incomplete, before this point. But, now, we
4578 have a complete type, so we can try again. */
4579 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4583 /* Is it valid for this decl to have an initializer at all? */
4585 /* Don't allow initializations for incomplete types except for
4586 arrays which might be completed by the initialization. */
4588 ; /* A complete type is ok. */
4589 else if (type_uses_auto (type
))
4590 ; /* An auto type is ok. */
4591 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4593 error ("variable %q#D has initializer but incomplete type", decl
);
4594 type
= TREE_TYPE (decl
) = error_mark_node
;
4596 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4598 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4599 error ("elements of array %q#D have incomplete type", decl
);
4600 /* else we already gave an error in start_decl. */
4603 else if (aggregate_definition_p
&& !complete_p
)
4605 if (type_uses_auto (type
))
4606 error ("declaration of %q#D has no initializer", decl
);
4608 error ("aggregate %q#D has incomplete type and cannot be defined",
4610 /* Change the type so that assemble_variable will give
4611 DECL an rtl we can live with: (mem (const_int 0)). */
4612 type
= TREE_TYPE (decl
) = error_mark_node
;
4615 /* Create a new scope to hold this declaration if necessary.
4616 Whether or not a new scope is necessary cannot be determined
4617 until after the type has been completed; if the type is a
4618 specialization of a class template it is not until after
4619 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4620 will be set correctly. */
4621 maybe_push_cleanup_level (type
);
4624 /* Handle initialization of references. DECL, TYPE, and INIT have the
4625 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4626 but will be set to a new CLEANUP_STMT if a temporary is created
4627 that must be destroyed subsequently.
4629 Returns an initializer expression to use to initialize DECL, or
4630 NULL if the initialization can be performed statically.
4632 Quotes on semantics can be found in ARM 8.4.3. */
4635 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4637 if (init
== NULL_TREE
)
4639 if ((DECL_LANG_SPECIFIC (decl
) == 0
4640 || DECL_IN_AGGR_P (decl
) == 0)
4641 && ! DECL_THIS_EXTERN (decl
))
4642 error ("%qD declared as reference but not initialized", decl
);
4646 if (TREE_CODE (init
) == TREE_LIST
)
4647 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4648 tf_warning_or_error
);
4650 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4651 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4652 /* Note: default conversion is only called in very special cases. */
4653 init
= decay_conversion (init
);
4655 /* Convert INIT to the reference type TYPE. This may involve the
4656 creation of a temporary, whose lifetime must be the same as that
4657 of the reference. If so, a DECL_EXPR for the temporary will be
4658 added just after the DECL_EXPR for DECL. That's why we don't set
4659 DECL_INITIAL for local references (instead assigning to them
4660 explicitly); we need to allow the temporary to be initialized
4662 return initialize_reference (type
, init
, flags
,
4663 tf_warning_or_error
);
4666 /* Designated initializers in arrays are not supported in GNU C++.
4667 The parser cannot detect this error since it does not know whether
4668 a given brace-enclosed initializer is for a class type or for an
4669 array. This function checks that CE does not use a designated
4670 initializer. If it does, an error is issued. Returns true if CE
4671 is valid, i.e., does not have a designated initializer. */
4674 check_array_designated_initializer (const constructor_elt
*ce
,
4675 unsigned HOST_WIDE_INT index
)
4677 /* Designated initializers for array elements are not supported. */
4680 /* The parser only allows identifiers as designated
4682 if (ce
->index
== error_mark_node
)
4683 error ("name used in a GNU-style designated "
4684 "initializer for an array");
4685 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4687 /* A C99 designator is OK if it matches the current index. */
4688 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4691 sorry ("non-trivial designated initializers not supported");
4695 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4696 error ("name %qD used in a GNU-style designated "
4697 "initializer for an array", ce
->index
);
4705 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4706 array until we finish parsing the initializer. If that's the
4707 situation we're in, update DECL accordingly. */
4710 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4712 tree type
= TREE_TYPE (decl
);
4714 if (TREE_CODE (type
) == ARRAY_TYPE
4715 && TYPE_DOMAIN (type
) == NULL_TREE
4716 && TREE_CODE (decl
) != TYPE_DECL
)
4718 /* do_default is really a C-ism to deal with tentative definitions.
4719 But let's leave it here to ease the eventual merge. */
4720 int do_default
= !DECL_EXTERNAL (decl
);
4721 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4724 /* Check that there are no designated initializers in INIT, as
4725 those are not supported in GNU C++, and as the middle-end
4726 will crash if presented with a non-numeric designated
4728 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4730 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4731 constructor_elt
*ce
;
4733 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4734 if (!check_array_designated_initializer (ce
, i
))
4740 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4744 error ("initializer fails to determine size of %qD", decl
);
4745 TREE_TYPE (decl
) = error_mark_node
;
4747 else if (failure
== 2)
4751 error ("array size missing in %qD", decl
);
4752 TREE_TYPE (decl
) = error_mark_node
;
4754 /* If a `static' var's size isn't known, make it extern as
4755 well as static, so it does not get allocated. If it's not
4756 `static', then don't mark it extern; finish_incomplete_decl
4757 will give it a default size and it will get allocated. */
4758 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4759 DECL_EXTERNAL (decl
) = 1;
4761 else if (failure
== 3)
4763 error ("zero-size array %qD", decl
);
4764 TREE_TYPE (decl
) = error_mark_node
;
4768 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4770 relayout_decl (decl
);
4774 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4775 any appropriate error messages regarding the layout. */
4778 layout_var_decl (tree decl
)
4782 type
= TREE_TYPE (decl
);
4783 if (type
== error_mark_node
)
4786 /* If we haven't already layed out this declaration, do so now.
4787 Note that we must not call complete type for an external object
4788 because it's type might involve templates that we are not
4789 supposed to instantiate yet. (And it's perfectly valid to say
4790 `extern X x' for some incomplete type `X'.) */
4791 if (!DECL_EXTERNAL (decl
))
4792 complete_type (type
);
4793 if (!DECL_SIZE (decl
)
4794 && TREE_TYPE (decl
) != error_mark_node
4795 && (COMPLETE_TYPE_P (type
)
4796 || (TREE_CODE (type
) == ARRAY_TYPE
4797 && !TYPE_DOMAIN (type
)
4798 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4799 layout_decl (decl
, 0);
4801 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4803 /* An automatic variable with an incomplete type: that is an error.
4804 Don't talk about array types here, since we took care of that
4805 message in grokdeclarator. */
4806 error ("storage size of %qD isn%'t known", decl
);
4807 TREE_TYPE (decl
) = error_mark_node
;
4810 /* Keep this code around in case we later want to control debug info
4811 based on whether a type is "used". (jason 1999-11-11) */
4813 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4814 /* Let debugger know it should output info for this type. */
4815 note_debug_info_needed (ttype
);
4817 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4818 note_debug_info_needed (DECL_CONTEXT (decl
));
4821 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4822 && DECL_SIZE (decl
) != NULL_TREE
4823 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4825 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4826 constant_expression_warning (DECL_SIZE (decl
));
4829 error ("storage size of %qD isn%'t constant", decl
);
4830 TREE_TYPE (decl
) = error_mark_node
;
4835 /* If a local static variable is declared in an inline function, or if
4836 we have a weak definition, we must endeavor to create only one
4837 instance of the variable at link-time. */
4840 maybe_commonize_var (tree decl
)
4842 /* Static data in a function with comdat linkage also has comdat
4844 if (TREE_STATIC (decl
)
4845 /* Don't mess with __FUNCTION__. */
4846 && ! DECL_ARTIFICIAL (decl
)
4847 && DECL_FUNCTION_SCOPE_P (decl
)
4848 && vague_linkage_p (DECL_CONTEXT (decl
)))
4852 /* With weak symbols, we simply make the variable COMDAT;
4853 that will cause copies in multiple translations units to
4855 comdat_linkage (decl
);
4859 if (DECL_INITIAL (decl
) == NULL_TREE
4860 || DECL_INITIAL (decl
) == error_mark_node
)
4862 /* Without weak symbols, we can use COMMON to merge
4863 uninitialized variables. */
4864 TREE_PUBLIC (decl
) = 1;
4865 DECL_COMMON (decl
) = 1;
4869 /* While for initialized variables, we must use internal
4870 linkage -- which means that multiple copies will not
4872 TREE_PUBLIC (decl
) = 0;
4873 DECL_COMMON (decl
) = 0;
4874 warning_at (input_location
, 0,
4875 "sorry: semantics of inline function static "
4876 "data %q+#D are wrong (you%'ll wind up "
4877 "with multiple copies)", decl
);
4878 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4879 " you can work around this by removing "
4884 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4885 /* Set it up again; we might have set DECL_INITIAL since the last
4887 comdat_linkage (decl
);
4890 /* Issue an error message if DECL is an uninitialized const variable. */
4893 check_for_uninitialized_const_var (tree decl
)
4895 tree type
= strip_array_types (TREE_TYPE (decl
));
4897 /* ``Unless explicitly declared extern, a const object does not have
4898 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4900 if (TREE_CODE (decl
) == VAR_DECL
4901 && TREE_CODE (type
) != REFERENCE_TYPE
4902 && CP_TYPE_CONST_P (type
)
4903 && !DECL_INITIAL (decl
))
4905 tree field
= default_init_uninitialized_part (type
);
4909 permerror (DECL_SOURCE_LOCATION (decl
),
4910 "uninitialized const %qD", decl
);
4912 if (CLASS_TYPE_P (type
))
4914 tree defaulted_ctor
;
4916 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4917 "%q#T has no user-provided default constructor", type
);
4918 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4920 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4921 "constructor is not user-provided because it is "
4922 "explicitly defaulted in the class body");
4923 inform (0, "and the implicitly-defined constructor does not "
4924 "initialize %q+#D", field
);
4929 /* Structure holding the current initializer being processed by reshape_init.
4930 CUR is a pointer to the current element being processed, END is a pointer
4931 after the last element present in the initializer. */
4932 typedef struct reshape_iterator_t
4934 constructor_elt
*cur
;
4935 constructor_elt
*end
;
4938 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
4940 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4941 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4942 initialized. If there are no more such fields, the return value
4946 next_initializable_field (tree field
)
4949 && (TREE_CODE (field
) != FIELD_DECL
4950 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4951 || DECL_ARTIFICIAL (field
)))
4952 field
= DECL_CHAIN (field
);
4957 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4958 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4959 INTEGER_CST representing the size of the array minus one (the maximum index),
4960 or NULL_TREE if the array was declared without specifying the size. D is
4961 the iterator within the constructor. */
4964 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
4965 tsubst_flags_t complain
)
4968 bool sized_array_p
= (max_index
!= NULL_TREE
);
4969 unsigned HOST_WIDE_INT max_index_cst
= 0;
4970 unsigned HOST_WIDE_INT index
;
4972 /* The initializer for an array is always a CONSTRUCTOR. */
4973 new_init
= build_constructor (init_list_type_node
, NULL
);
4977 /* Minus 1 is used for zero sized arrays. */
4978 if (integer_all_onesp (max_index
))
4981 if (host_integerp (max_index
, 1))
4982 max_index_cst
= tree_low_cst (max_index
, 1);
4983 /* sizetype is sign extended, not zero extended. */
4985 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4989 /* Loop until there are no more initializers. */
4991 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4996 check_array_designated_initializer (d
->cur
, index
);
4997 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
4999 if (elt_init
== error_mark_node
)
5000 return error_mark_node
;
5001 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5002 size_int (index
), elt_init
);
5003 if (!TREE_CONSTANT (elt_init
))
5004 TREE_CONSTANT (new_init
) = false;
5010 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5011 Parameters are the same of reshape_init_r. */
5014 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5016 tree max_index
= NULL_TREE
;
5018 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5020 if (TYPE_DOMAIN (type
))
5021 max_index
= array_type_nelts (type
);
5023 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5026 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5027 Parameters are the same of reshape_init_r. */
5030 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5032 tree max_index
= NULL_TREE
;
5034 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5036 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5038 tree value
= d
->cur
->value
;
5039 if (!same_type_p (TREE_TYPE (value
), type
))
5041 if (complain
& tf_error
)
5042 error ("invalid type %qT as initializer for a vector of type %qT",
5043 TREE_TYPE (d
->cur
->value
), type
);
5044 value
= error_mark_node
;
5050 /* For a vector, we initialize it as an array of the appropriate size. */
5051 if (TREE_CODE (type
) == VECTOR_TYPE
)
5052 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5054 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5057 /* Subroutine of reshape_init_r, processes the initializers for classes
5058 or union. Parameters are the same of reshape_init_r. */
5061 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5062 tsubst_flags_t complain
)
5067 gcc_assert (CLASS_TYPE_P (type
));
5069 /* The initializer for a class is always a CONSTRUCTOR. */
5070 new_init
= build_constructor (init_list_type_node
, NULL
);
5071 field
= next_initializable_field (TYPE_FIELDS (type
));
5077 An initializer for an aggregate member that is an
5078 empty class shall have the form of an empty
5079 initializer-list {}. */
5080 if (!first_initializer_p
)
5082 if (complain
& tf_error
)
5083 error ("initializer for %qT must be brace-enclosed", type
);
5084 return error_mark_node
;
5089 /* Loop through the initializable fields, gathering initializers. */
5090 while (d
->cur
!= d
->end
)
5094 /* Handle designated initializers, as an extension. */
5097 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5099 if (complain
& tf_error
)
5100 error ("%<[%E] =%> used in a GNU-style designated initializer"
5101 " for class %qT", d
->cur
->index
, type
);
5102 return error_mark_node
;
5105 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5107 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5109 if (complain
& tf_error
)
5110 error ("%qT has no non-static data member named %qD", type
,
5112 return error_mark_node
;
5116 /* If we processed all the member of the class, we are done. */
5120 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5121 /*first_initializer_p=*/false, complain
);
5122 if (field_init
== error_mark_node
)
5123 return error_mark_node
;
5125 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5129 When a union is initialized with a brace-enclosed
5130 initializer, the braces shall only contain an
5131 initializer for the first member of the union. */
5132 if (TREE_CODE (type
) == UNION_TYPE
)
5135 field
= next_initializable_field (DECL_CHAIN (field
));
5141 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5142 designators are not valid; either complain or return true to indicate
5143 that reshape_init_r should return error_mark_node. */
5146 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5150 if (complain
& tf_error
)
5151 error ("C99 designator %qE outside aggregate initializer",
5159 /* Subroutine of reshape_init, which processes a single initializer (part of
5160 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5161 iterator within the CONSTRUCTOR which points to the initializer to process.
5162 FIRST_INITIALIZER_P is true if this is the first initializer of the
5163 outermost CONSTRUCTOR node. */
5166 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5167 tsubst_flags_t complain
)
5169 tree init
= d
->cur
->value
;
5171 if (error_operand_p (init
))
5172 return error_mark_node
;
5174 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5175 && has_designator_problem (d
, complain
))
5176 return error_mark_node
;
5178 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5180 /* A complex type can be initialized from one or two initializers,
5181 but braces are not elided. */
5183 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5185 if (CONSTRUCTOR_NELTS (init
) > 2)
5187 if (complain
& tf_error
)
5188 error ("too many initializers for %qT", type
);
5190 return error_mark_node
;
5193 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5195 VEC(constructor_elt
, gc
) *v
= 0;
5196 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5197 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5198 if (has_designator_problem (d
, complain
))
5199 return error_mark_node
;
5201 init
= build_constructor (init_list_type_node
, v
);
5206 /* A non-aggregate type is always initialized with a single
5208 if (!CP_AGGREGATE_TYPE_P (type
))
5210 /* It is invalid to initialize a non-aggregate type with a
5211 brace-enclosed initializer before C++0x.
5212 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5213 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5214 a CONSTRUCTOR (with a record type). */
5215 if (TREE_CODE (init
) == CONSTRUCTOR
5216 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5218 if (SCALAR_TYPE_P (type
))
5220 if (complain
& tf_error
)
5221 error ("braces around scalar initializer for type %qT", type
);
5222 init
= error_mark_node
;
5225 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5234 All implicit type conversions (clause _conv_) are considered when
5235 initializing the aggregate member with an initializer from an
5236 initializer-list. If the initializer can initialize a member,
5237 the member is initialized. Otherwise, if the member is itself a
5238 non-empty subaggregate, brace elision is assumed and the
5239 initializer is considered for the initialization of the first
5240 member of the subaggregate. */
5241 if (TREE_CODE (init
) != CONSTRUCTOR
5242 /* But don't try this for the first initializer, since that would be
5243 looking through the outermost braces; A a2 = { a1 }; is not a
5244 valid aggregate initialization. */
5245 && !first_initializer_p
5246 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5247 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5253 /* [dcl.init.string]
5255 A char array (whether plain char, signed char, or unsigned char)
5256 can be initialized by a string-literal (optionally enclosed in
5257 braces); a wchar_t array can be initialized by a wide
5258 string-literal (optionally enclosed in braces). */
5259 if (TREE_CODE (type
) == ARRAY_TYPE
5260 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5262 tree str_init
= init
;
5264 /* Strip one level of braces if and only if they enclose a single
5265 element (as allowed by [dcl.init.string]). */
5266 if (!first_initializer_p
5267 && TREE_CODE (str_init
) == CONSTRUCTOR
5268 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5270 str_init
= VEC_index (constructor_elt
,
5271 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5274 /* If it's a string literal, then it's the initializer for the array
5275 as a whole. Otherwise, continue with normal initialization for
5276 array types (one value per array element). */
5277 if (TREE_CODE (str_init
) == STRING_CST
)
5279 if (has_designator_problem (d
, complain
))
5280 return error_mark_node
;
5286 /* The following cases are about aggregates. If we are not within a full
5287 initializer already, and there is not a CONSTRUCTOR, it means that there
5288 is a missing set of braces (that is, we are processing the case for
5289 which reshape_init exists). */
5290 if (!first_initializer_p
)
5292 if (TREE_CODE (init
) == CONSTRUCTOR
)
5294 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5295 /* There is no need to reshape pointer-to-member function
5296 initializers, as they are always constructed correctly
5297 by the front end. */
5299 else if (COMPOUND_LITERAL_P (init
))
5300 /* For a nested compound literal, there is no need to reshape since
5301 brace elision is not allowed. Even if we decided to allow it,
5302 we should add a call to reshape_init in finish_compound_literal,
5303 before calling digest_init, so changing this code would still
5304 not be necessary. */
5305 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5309 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5310 return reshape_init (type
, init
, complain
);
5314 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5318 /* Dispatch to specialized routines. */
5319 if (CLASS_TYPE_P (type
))
5320 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5321 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5322 return reshape_init_array (type
, d
, complain
);
5323 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5324 return reshape_init_vector (type
, d
, complain
);
5329 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5330 brace-enclosed aggregate initializer.
5332 INIT is the CONSTRUCTOR containing the list of initializers describing
5333 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5334 It may not presently match the shape of the TYPE; for example:
5336 struct S { int a; int b; };
5337 struct S a[] = { 1, 2, 3, 4 };
5339 Here INIT will hold a VEC of four elements, rather than a
5340 VEC of two elements, each itself a VEC of two elements. This
5341 routine transforms INIT from the former form into the latter. The
5342 revised CONSTRUCTOR node is returned. */
5345 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5347 VEC(constructor_elt
, gc
) *v
;
5351 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5353 v
= CONSTRUCTOR_ELTS (init
);
5355 /* An empty constructor does not need reshaping, and it is always a valid
5357 if (VEC_empty (constructor_elt
, v
))
5360 /* Recurse on this CONSTRUCTOR. */
5361 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5362 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5364 new_init
= reshape_init_r (type
, &d
, true, complain
);
5365 if (new_init
== error_mark_node
)
5366 return error_mark_node
;
5368 /* Make sure all the element of the constructor were used. Otherwise,
5369 issue an error about exceeding initializers. */
5372 if (complain
& tf_error
)
5373 error ("too many initializers for %qT", type
);
5375 return error_mark_node
;
5381 /* Verify array initializer. Returns true if errors have been reported. */
5384 check_array_initializer (tree decl
, tree type
, tree init
)
5386 tree element_type
= TREE_TYPE (type
);
5388 /* The array type itself need not be complete, because the
5389 initializer may tell us how many elements are in the array.
5390 But, the elements of the array must be complete. */
5391 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5394 error ("elements of array %q#D have incomplete type", decl
);
5396 error ("elements of array %q#T have incomplete type", type
);
5399 /* It is not valid to initialize a VLA. */
5401 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5402 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5405 error ("variable-sized object %qD may not be initialized", decl
);
5407 error ("variable-sized compound literal");
5413 /* Subroutine of check_initializer; args are passed down from that function.
5414 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5417 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5420 gcc_assert (stmts_are_full_exprs_p ());
5421 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5424 /* Verify INIT (the initializer for DECL), and record the
5425 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5426 grok_reference_init.
5428 If the return value is non-NULL, it is an expression that must be
5429 evaluated dynamically to initialize DECL. */
5432 check_initializer (tree decl
, tree init
, int flags
, VEC(tree
,gc
) **cleanups
)
5434 tree type
= TREE_TYPE (decl
);
5435 tree init_code
= NULL
;
5436 tree extra_init
= NULL_TREE
;
5439 /* Things that are going to be initialized need to have complete
5441 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5443 if (DECL_HAS_VALUE_EXPR_P (decl
))
5445 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5446 it doesn't have storage to be initialized. */
5447 gcc_assert (init
== NULL_TREE
);
5451 if (type
== error_mark_node
)
5452 /* We will have already complained. */
5455 if (TREE_CODE (type
) == ARRAY_TYPE
)
5457 if (check_array_initializer (decl
, type
, init
))
5460 else if (!COMPLETE_TYPE_P (type
))
5462 error ("%q#D has incomplete type", decl
);
5463 TREE_TYPE (decl
) = error_mark_node
;
5467 /* There is no way to make a variable-sized class type in GNU C++. */
5468 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5470 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5472 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5473 if (SCALAR_TYPE_P (type
))
5477 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5478 init
= build_zero_init (type
, NULL_TREE
, false);
5480 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5482 error ("scalar object %qD requires one element in initializer",
5484 TREE_TYPE (decl
) = error_mark_node
;
5490 if (TREE_CODE (decl
) == CONST_DECL
)
5492 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5494 DECL_INITIAL (decl
) = init
;
5496 gcc_assert (init
!= NULL_TREE
);
5499 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5501 else if (init
|| type_build_ctor_call (type
)
5502 || TREE_CODE (type
) == REFERENCE_TYPE
)
5504 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5506 init
= grok_reference_init (decl
, type
, init
, flags
);
5507 flags
|= LOOKUP_ALREADY_DIGESTED
;
5510 check_for_uninitialized_const_var (decl
);
5511 /* Do not reshape constructors of vectors (they don't need to be
5513 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5515 if (is_std_init_list (type
))
5517 init
= perform_implicit_conversion (type
, init
,
5518 tf_warning_or_error
);
5519 flags
|= LOOKUP_ALREADY_DIGESTED
;
5521 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5523 /* Don't reshape if the class has constructors. */
5524 if (cxx_dialect
== cxx98
)
5525 error ("in C++98 %qD must be initialized by constructor, "
5529 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5531 error ("opaque vector types cannot be initialized");
5532 init
= error_mark_node
;
5536 init
= reshape_init (type
, init
, tf_warning_or_error
);
5537 if (SCALAR_TYPE_P (type
))
5538 check_narrowing (type
, init
);
5542 /* If DECL has an array type without a specific bound, deduce the
5543 array size from the initializer. */
5544 maybe_deduce_size_from_array_init (decl
, init
);
5545 type
= TREE_TYPE (decl
);
5546 if (type
== error_mark_node
)
5549 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5550 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5551 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5552 && CP_AGGREGATE_TYPE_P (type
)))
5554 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5556 /* If this is a constexpr initializer, expand_default_init will
5557 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5558 case, pull the initializer back out and pass it down into
5559 store_init_value. */
5560 while (TREE_CODE (init_code
) == EXPR_STMT
5561 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5562 init_code
= TREE_OPERAND (init_code
, 0);
5563 if (TREE_CODE (init_code
) == INIT_EXPR
)
5565 init
= TREE_OPERAND (init_code
, 1);
5566 init_code
= NULL_TREE
;
5567 /* Don't call digest_init; it's unnecessary and will complain
5568 about aggregate initialization of non-aggregate classes. */
5569 flags
|= LOOKUP_ALREADY_DIGESTED
;
5571 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5573 /* Declared constexpr, but no suitable initializer; massage
5574 init appropriately so we can pass it into store_init_value
5576 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5577 init
= finish_compound_literal (type
, init
,
5578 tf_warning_or_error
);
5579 else if (CLASS_TYPE_P (type
)
5580 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5582 init
= build_functional_cast (type
, init
, tf_none
);
5583 if (init
!= error_mark_node
)
5584 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5586 init_code
= NULL_TREE
;
5592 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5594 /* In aggregate initialization of a variable, each element
5595 initialization is a full-expression because there is no
5596 enclosing expression. */
5597 gcc_assert (stmts_are_full_exprs_p ());
5599 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5601 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5602 && DECL_INITIAL (decl
)
5603 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5604 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5605 warning (0, "array %qD initialized by parenthesized string literal %qE",
5606 decl
, DECL_INITIAL (decl
));
5612 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5613 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5614 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5615 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5618 check_for_uninitialized_const_var (decl
);
5621 if (init
&& init
!= error_mark_node
)
5622 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5625 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5627 if (init_code
&& DECL_IN_AGGR_P (decl
))
5629 static int explained
= 0;
5631 if (cxx_dialect
< cxx0x
)
5632 error ("initializer invalid for static member with constructor");
5634 error ("non-constant in-class initialization invalid for static "
5635 "member %qD", decl
);
5638 error ("(an out of class initialization is required)");
5646 /* If DECL is not a local variable, give it RTL. */
5649 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5651 int toplev
= toplevel_bindings_p ();
5653 const char *filename
;
5655 /* Set the DECL_ASSEMBLER_NAME for the object. */
5658 /* The `register' keyword, when used together with an
5659 asm-specification, indicates that the variable should be
5660 placed in a particular register. */
5661 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5663 set_user_assembler_name (decl
, asmspec
);
5664 DECL_HARD_REGISTER (decl
) = 1;
5668 if (TREE_CODE (decl
) == FUNCTION_DECL
5669 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5670 set_builtin_user_assembler_name (decl
, asmspec
);
5671 set_user_assembler_name (decl
, asmspec
);
5675 /* Handle non-variables up front. */
5676 if (TREE_CODE (decl
) != VAR_DECL
)
5678 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5682 /* If we see a class member here, it should be a static data
5684 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5686 gcc_assert (TREE_STATIC (decl
));
5687 /* An in-class declaration of a static data member should be
5688 external; it is only a declaration, and not a definition. */
5689 if (init
== NULL_TREE
)
5690 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5693 /* We don't create any RTL for local variables. */
5694 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5697 /* We defer emission of local statics until the corresponding
5698 DECL_EXPR is expanded. */
5699 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5701 /* We try to defer namespace-scope static constants so that they are
5702 not emitted into the object file unnecessarily. */
5703 filename
= input_filename
;
5704 if (!DECL_VIRTUAL_P (decl
)
5705 && TREE_READONLY (decl
)
5706 && DECL_INITIAL (decl
) != NULL_TREE
5707 && DECL_INITIAL (decl
) != error_mark_node
5709 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5711 && !TREE_PUBLIC (decl
))
5713 /* Fool with the linkage of static consts according to #pragma
5715 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5716 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5718 TREE_PUBLIC (decl
) = 1;
5719 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5724 /* Likewise for template instantiations. */
5725 else if (DECL_LANG_SPECIFIC (decl
)
5726 && DECL_IMPLICIT_INSTANTIATION (decl
))
5729 /* If we're not deferring, go ahead and assemble the variable. */
5731 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5734 /* walk_tree helper for wrap_temporary_cleanups, below. */
5737 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5739 /* Stop at types or full-expression boundaries. */
5740 if (TYPE_P (*stmt_p
)
5741 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5747 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5749 tree guard
= (tree
)data
;
5750 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5752 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5753 /* Tell honor_protect_cleanup_actions to handle this as a separate
5755 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5757 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5763 /* We're initializing a local variable which has a cleanup GUARD. If there
5764 are any temporaries used in the initializer INIT of this variable, we
5765 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5766 variable will be cleaned up properly if one of them throws.
5768 Unfortunately, there's no way to express this properly in terms of
5769 nesting, as the regions for the temporaries overlap the region for the
5770 variable itself; if there are two temporaries, the variable needs to be
5771 the first thing destroyed if either of them throws. However, we only
5772 want to run the variable's cleanup if it actually got constructed. So
5773 we need to guard the temporary cleanups with the variable's cleanup if
5774 they are run on the normal path, but not if they are run on the
5775 exceptional path. We implement this by telling
5776 honor_protect_cleanup_actions to strip the variable cleanup from the
5777 exceptional path. */
5780 wrap_temporary_cleanups (tree init
, tree guard
)
5782 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5785 /* Generate code to initialize DECL (a local variable). */
5788 initialize_local_var (tree decl
, tree init
)
5790 tree type
= TREE_TYPE (decl
);
5794 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5795 || TREE_CODE (decl
) == RESULT_DECL
);
5796 gcc_assert (!TREE_STATIC (decl
));
5798 if (DECL_SIZE (decl
) == NULL_TREE
)
5800 /* If we used it already as memory, it must stay in memory. */
5801 DECL_INITIAL (decl
) = NULL_TREE
;
5802 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5806 if (type
== error_mark_node
)
5809 /* Compute and store the initial value. */
5810 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5811 if (TREE_USED (type
))
5812 DECL_READ_P (decl
) = 1;
5814 /* Generate a cleanup, if necessary. */
5815 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5817 /* Perform the initialization. */
5820 if (TREE_CODE (init
) == INIT_EXPR
5821 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5823 /* Stick simple initializers in DECL_INITIAL so that
5824 -Wno-init-self works (c++/34772). */
5825 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5826 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5830 int saved_stmts_are_full_exprs_p
;
5832 /* If we're only initializing a single object, guard the
5833 destructors of any temporaries used in its initializer with
5834 its destructor. This isn't right for arrays because each
5835 element initialization is a full-expression. */
5836 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5837 wrap_temporary_cleanups (init
, cleanup
);
5839 gcc_assert (building_stmt_list_p ());
5840 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5841 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5842 finish_expr_stmt (init
);
5843 current_stmt_tree ()->stmts_are_full_exprs_p
=
5844 saved_stmts_are_full_exprs_p
;
5848 /* Set this to 0 so we can tell whether an aggregate which was
5849 initialized was ever used. Don't do this if it has a
5850 destructor, so we don't complain about the 'resource
5851 allocation is initialization' idiom. Now set
5852 attribute((unused)) on types so decls of that type will be
5853 marked used. (see TREE_USED, above.) */
5854 if (TYPE_NEEDS_CONSTRUCTING (type
)
5856 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5857 && DECL_NAME (decl
))
5858 TREE_USED (decl
) = 0;
5859 else if (already_used
)
5860 TREE_USED (decl
) = 1;
5863 finish_decl_cleanup (decl
, cleanup
);
5866 /* DECL is a VAR_DECL for a compiler-generated variable with static
5867 storage duration (like a virtual table) whose initializer is a
5868 compile-time constant. Initialize the variable and provide it to the
5872 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5875 gcc_assert (DECL_ARTIFICIAL (decl
));
5876 init
= build_constructor (TREE_TYPE (decl
), v
);
5877 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5878 DECL_INITIAL (decl
) = init
;
5879 DECL_INITIALIZED_P (decl
) = 1;
5880 determine_visibility (decl
);
5881 layout_var_decl (decl
);
5882 maybe_commonize_var (decl
);
5883 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5886 /* INIT is the initializer for a variable, as represented by the
5887 parser. Returns true iff INIT is type-dependent. */
5890 type_dependent_init_p (tree init
)
5892 if (TREE_CODE (init
) == TREE_LIST
)
5893 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5894 return any_type_dependent_elements_p (init
);
5895 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5896 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5898 VEC(constructor_elt
, gc
) *elts
;
5902 elts
= CONSTRUCTOR_ELTS (init
);
5903 nelts
= VEC_length (constructor_elt
, elts
);
5904 for (i
= 0; i
< nelts
; ++i
)
5905 if (type_dependent_init_p (VEC_index (constructor_elt
,
5910 /* It must be a simple expression, e.g., int i = 3; */
5911 return type_dependent_expression_p (init
);
5916 /* INIT is the initializer for a variable, as represented by the
5917 parser. Returns true iff INIT is value-dependent. */
5920 value_dependent_init_p (tree init
)
5922 if (TREE_CODE (init
) == TREE_LIST
)
5923 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5924 return any_value_dependent_elements_p (init
);
5925 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5926 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5928 VEC(constructor_elt
, gc
) *elts
;
5932 elts
= CONSTRUCTOR_ELTS (init
);
5933 nelts
= VEC_length (constructor_elt
, elts
);
5934 for (i
= 0; i
< nelts
; ++i
)
5935 if (value_dependent_init_p (VEC_index (constructor_elt
,
5940 /* It must be a simple expression, e.g., int i = 3; */
5941 return value_dependent_expression_p (init
);
5946 /* Finish processing of a declaration;
5947 install its line number and initial value.
5948 If the length of an array type is not known before,
5949 it must be determined now, from the initial value, or it is an error.
5951 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5952 true, then INIT is an integral constant expression.
5954 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5955 if the (init) syntax was used. */
5958 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5959 tree asmspec_tree
, int flags
)
5962 VEC(tree
,gc
) *cleanups
= NULL
;
5963 const char *asmspec
= NULL
;
5964 int was_readonly
= 0;
5965 bool var_definition_p
= false;
5968 if (decl
== error_mark_node
)
5973 error ("assignment (not initialization) in declaration");
5977 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5978 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5979 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5981 type
= TREE_TYPE (decl
);
5982 if (type
== error_mark_node
)
5985 /* If a name was specified, get the string. */
5986 if (at_namespace_scope_p ())
5987 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5988 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5989 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5991 if (current_class_type
5992 && CP_DECL_CONTEXT (decl
) == current_class_type
5993 && TYPE_BEING_DEFINED (current_class_type
)
5994 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
5995 && (DECL_INITIAL (decl
) || init
))
5996 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5998 auto_node
= type_uses_auto (type
);
6002 if (init
== NULL_TREE
)
6004 error ("declaration of %q#D has no initializer", decl
);
6005 TREE_TYPE (decl
) = error_mark_node
;
6009 if (TREE_CODE (d_init
) == TREE_LIST
)
6010 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6011 tf_warning_or_error
);
6012 d_init
= resolve_nondeduced_context (d_init
);
6013 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6015 if (type
== error_mark_node
)
6019 if (!ensure_literal_type_for_constexpr_object (decl
))
6020 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6022 if (TREE_CODE (decl
) == VAR_DECL
6023 && DECL_CLASS_SCOPE_P (decl
)
6024 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6025 check_static_variable_definition (decl
, type
);
6027 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6030 if (init
== ridpointers
[(int)RID_DELETE
])
6032 /* FIXME check this is 1st decl. */
6033 DECL_DELETED_FN (decl
) = 1;
6034 DECL_DECLARED_INLINE_P (decl
) = 1;
6035 DECL_INITIAL (decl
) = error_mark_node
;
6036 FOR_EACH_CLONE (clone
, decl
)
6038 DECL_DELETED_FN (clone
) = 1;
6039 DECL_DECLARED_INLINE_P (clone
) = 1;
6040 DECL_INITIAL (clone
) = error_mark_node
;
6044 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6046 if (defaultable_fn_check (decl
))
6047 DECL_DEFAULTED_FN (decl
) = 1;
6049 DECL_INITIAL (decl
) = NULL_TREE
;
6053 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6055 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6056 /* If DECL is a reference, then we want to know whether init is a
6057 reference constant; init_const_expr_p as passed tells us whether
6058 it's an rvalue constant. */
6059 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6060 init_const_expr_p
= potential_constant_expression (init
);
6061 if (init_const_expr_p
)
6063 /* Set these flags now for templates. We'll update the flags in
6064 store_init_value for instantiations. */
6065 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6066 if (decl_maybe_constant_var_p (decl
))
6067 TREE_CONSTANT (decl
) = 1;
6071 if (processing_template_decl
)
6073 bool type_dependent_p
;
6075 /* Add this declaration to the statement-tree. */
6076 if (at_function_scope_p ())
6077 add_decl_expr (decl
);
6079 type_dependent_p
= dependent_type_p (type
);
6081 if (check_for_bare_parameter_packs (init
))
6084 DECL_INITIAL (decl
) = NULL_TREE
;
6087 /* Generally, initializers in templates are expanded when the
6088 template is instantiated. But, if DECL is a variable constant
6089 then it can be used in future constant expressions, so its value
6090 must be available. */
6092 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6093 /* We can't do anything if the decl has dependent type. */;
6095 && init_const_expr_p
6096 && !type_dependent_p
6097 && decl_maybe_constant_var_p (decl
)
6098 && !type_dependent_init_p (init
)
6099 && !value_dependent_init_p (init
))
6101 /* This variable seems to be a non-dependent constant, so process
6102 its initializer. If check_initializer returns non-null the
6103 initialization wasn't constant after all. */
6105 cleanups
= make_tree_vector ();
6106 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6107 if (init_code
== NULL_TREE
)
6109 release_tree_vector (cleanups
);
6111 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6112 /* Deduce array size even if the initializer is dependent. */
6113 maybe_deduce_size_from_array_init (decl
, init
);
6116 DECL_INITIAL (decl
) = init
;
6120 /* Just store non-static data member initializers for later. */
6121 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6122 DECL_INITIAL (decl
) = init
;
6124 /* Take care of TYPE_DECLs up front. */
6125 if (TREE_CODE (decl
) == TYPE_DECL
)
6127 if (type
!= error_mark_node
6128 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6130 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6131 warning (0, "shadowing previous type declaration of %q#D", decl
);
6132 set_identifier_type_value (DECL_NAME (decl
), decl
);
6135 /* If we have installed this as the canonical typedef for this
6136 type, and that type has not been defined yet, delay emitting
6137 the debug information for it, as we will emit it later. */
6138 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6139 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6140 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6142 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6147 /* A reference will be modified here, as it is initialized. */
6148 if (! DECL_EXTERNAL (decl
)
6149 && TREE_READONLY (decl
)
6150 && TREE_CODE (type
) == REFERENCE_TYPE
)
6153 TREE_READONLY (decl
) = 0;
6156 if (TREE_CODE (decl
) == VAR_DECL
)
6158 /* Only variables with trivial initialization and destruction can
6159 have thread-local storage. */
6160 if (DECL_THREAD_LOCAL_P (decl
)
6161 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
6162 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
6163 error ("%qD cannot be thread-local because it has non-trivial "
6164 "type %qT", decl
, TREE_TYPE (decl
));
6165 /* If this is a local variable that will need a mangled name,
6166 register it now. We must do this before processing the
6167 initializer for the variable, since the initialization might
6168 require a guard variable, and since the mangled name of the
6169 guard variable will depend on the mangled name of this
6171 if (DECL_FUNCTION_SCOPE_P (decl
)
6172 && TREE_STATIC (decl
)
6173 && !DECL_ARTIFICIAL (decl
))
6175 push_local_name (decl
);
6176 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6177 || DECL_DESTRUCTOR_P (current_function_decl
))
6178 /* Normally local_decls is populated during GIMPLE lowering,
6179 but [cd]tors are never actually compiled directly. We need
6180 to put statics on the list so we can deal with the label
6181 address extension. */
6182 add_local_decl (cfun
, decl
);
6185 /* Convert the initializer to the type of DECL, if we have not
6186 already initialized DECL. */
6187 if (!DECL_INITIALIZED_P (decl
)
6188 /* If !DECL_EXTERNAL then DECL is being defined. In the
6189 case of a static data member initialized inside the
6190 class-specifier, there can be an initializer even if DECL
6191 is *not* defined. */
6192 && (!DECL_EXTERNAL (decl
) || init
))
6194 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6197 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6198 /* Allow libjava/prims.cc define primitive classes. */
6199 if (init
!= NULL_TREE
6200 || jclass
== NULL_TREE
6201 || TREE_CODE (jclass
) != TYPE_DECL
6202 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6203 || !same_type_ignoring_top_level_qualifiers_p
6204 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6205 error ("Java object %qD not allocated with %<new%>", decl
);
6208 cleanups
= make_tree_vector ();
6209 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6210 /* Thread-local storage cannot be dynamically initialized. */
6211 if (DECL_THREAD_LOCAL_P (decl
) && init
)
6213 error ("%qD is thread-local and so cannot be dynamically "
6214 "initialized", decl
);
6218 /* Check that the initializer for a static data member was a
6219 constant. Although we check in the parser that the
6220 initializer is an integral constant expression, we do not
6221 simplify division-by-zero at the point at which it
6222 occurs. Therefore, in:
6224 struct S { static const int i = 7 / 0; };
6226 we issue an error at this point. It would
6227 probably be better to forbid division by zero in
6228 integral constant expressions. */
6229 if (DECL_EXTERNAL (decl
) && init
)
6231 error ("%qD cannot be initialized by a non-constant expression"
6232 " when being declared", decl
);
6233 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6241 The memory occupied by any object of static storage
6242 duration is zero-initialized at program startup before
6243 any other initialization takes place.
6245 We cannot create an appropriate initializer until after
6246 the type of DECL is finalized. If DECL_INITIAL is set,
6247 then the DECL is statically initialized, and any
6248 necessary zero-initialization has already been performed. */
6249 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6250 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6251 /*nelts=*/NULL_TREE
,
6252 /*static_storage_p=*/true);
6253 /* Remember that the initialization for this variable has
6255 DECL_INITIALIZED_P (decl
) = 1;
6256 /* This declaration is the definition of this variable,
6257 unless we are initializing a static data member within
6258 the class specifier. */
6259 if (!DECL_EXTERNAL (decl
))
6260 var_definition_p
= true;
6262 /* If the variable has an array type, lay out the type, even if
6263 there is no initializer. It is valid to index through the
6264 array, and we must get TYPE_ALIGN set correctly on the array
6266 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6269 if (TREE_STATIC (decl
)
6270 && !at_function_scope_p ()
6271 && current_function_decl
== NULL
)
6272 /* So decl is a global variable or a static member of a
6273 non local class. Record the types it uses
6274 so that we can decide later to emit debug info for them. */
6275 record_types_used_by_current_var_decl (decl
);
6277 else if (TREE_CODE (decl
) == FIELD_DECL
6278 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6279 error ("non-static data member %qD has Java class type", decl
);
6281 /* Add this declaration to the statement-tree. This needs to happen
6282 after the call to check_initializer so that the DECL_EXPR for a
6283 reference temp is added before the DECL_EXPR for the reference itself. */
6284 if (DECL_FUNCTION_SCOPE_P (decl
))
6285 add_decl_expr (decl
);
6287 /* Let the middle end know about variables and functions -- but not
6288 static data members in uninstantiated class templates. */
6289 if (TREE_CODE (decl
) == VAR_DECL
6290 || TREE_CODE (decl
) == FUNCTION_DECL
)
6292 if (TREE_CODE (decl
) == VAR_DECL
)
6294 layout_var_decl (decl
);
6295 maybe_commonize_var (decl
);
6298 /* This needs to happen after the linkage is set. */
6299 determine_visibility (decl
);
6301 if (var_definition_p
&& TREE_STATIC (decl
))
6303 /* If a TREE_READONLY variable needs initialization
6304 at runtime, it is no longer readonly and we need to
6305 avoid MEM_READONLY_P being set on RTL created for it. */
6308 if (TREE_READONLY (decl
))
6309 TREE_READONLY (decl
) = 0;
6312 else if (was_readonly
)
6313 TREE_READONLY (decl
) = 1;
6316 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6318 /* Check for abstractness of the type. Notice that there is no
6319 need to strip array types here since the check for those types
6320 is already done within create_array_type_for_decl. */
6321 if (TREE_CODE (type
) == FUNCTION_TYPE
6322 || TREE_CODE (type
) == METHOD_TYPE
)
6323 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6325 abstract_virtuals_error (decl
, type
);
6327 if (TREE_TYPE (decl
) == error_mark_node
)
6328 /* No initialization required. */
6330 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6334 if (init
== ridpointers
[(int)RID_DEFAULT
])
6336 /* An out-of-class default definition is defined at
6337 the point where it is explicitly defaulted. */
6338 if (DECL_DELETED_FN (decl
))
6339 maybe_explain_implicit_delete (decl
);
6340 else if (DECL_INITIAL (decl
) == error_mark_node
)
6341 synthesize_method (decl
);
6344 error ("function %q#D is initialized like a variable", decl
);
6346 /* else no initialization required. */
6348 else if (DECL_EXTERNAL (decl
)
6349 && ! (DECL_LANG_SPECIFIC (decl
)
6350 && DECL_NOT_REALLY_EXTERN (decl
)))
6353 DECL_INITIAL (decl
) = init
;
6355 /* A variable definition. */
6356 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6357 /* Initialize the local variable. */
6358 initialize_local_var (decl
, init
);
6360 /* If a variable is defined, and then a subsequent
6361 definition with external linkage is encountered, we will
6362 get here twice for the same variable. We want to avoid
6363 calling expand_static_init more than once. For variables
6364 that are not static data members, we can call
6365 expand_static_init only when we actually process the
6366 initializer. It is not legal to redeclare a static data
6367 member, so this issue does not arise in that case. */
6368 else if (var_definition_p
&& TREE_STATIC (decl
))
6369 expand_static_init (decl
, init
);
6372 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6373 reference, insert it in the statement-tree now. */
6377 FOR_EACH_VEC_ELT (tree
, cleanups
, i
, t
)
6378 push_cleanup (decl
, t
, false);
6379 release_tree_vector (cleanups
);
6383 TREE_READONLY (decl
) = 1;
6385 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6388 /* Returns a declaration for a VAR_DECL as if:
6390 extern "C" TYPE NAME;
6392 had been seen. Used to create compiler-generated global
6396 declare_global_var (tree name
, tree type
)
6400 push_to_top_level ();
6401 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6402 TREE_PUBLIC (decl
) = 1;
6403 DECL_EXTERNAL (decl
) = 1;
6404 DECL_ARTIFICIAL (decl
) = 1;
6405 /* If the user has explicitly declared this variable (perhaps
6406 because the code we are compiling is part of a low-level runtime
6407 library), then it is possible that our declaration will be merged
6408 with theirs by pushdecl. */
6409 decl
= pushdecl (decl
);
6410 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6411 pop_from_top_level ();
6416 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6417 if "__cxa_atexit" is not being used) corresponding to the function
6418 to be called when the program exits. */
6421 get_atexit_fn_ptr_type (void)
6425 if (!atexit_fn_ptr_type_node
)
6428 if (flag_use_cxa_atexit
6429 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6430 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6431 arg_type
= ptr_type_node
;
6433 /* The parameter to "atexit" is "void (*)(void)". */
6434 arg_type
= NULL_TREE
;
6436 fn_type
= build_function_type_list (void_type_node
,
6437 arg_type
, NULL_TREE
);
6438 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6441 return atexit_fn_ptr_type_node
;
6444 /* Returns a pointer to the `atexit' function. Note that if
6445 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6446 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6449 get_atexit_node (void)
6455 bool use_aeabi_atexit
;
6460 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6462 /* The declaration for `__cxa_atexit' is:
6464 int __cxa_atexit (void (*)(void *), void *, void *)
6466 We build up the argument types and then the function type
6468 tree argtype0
, argtype1
, argtype2
;
6470 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6471 /* First, build the pointer-to-function type for the first
6473 fn_ptr_type
= get_atexit_fn_ptr_type ();
6474 /* Then, build the rest of the argument types. */
6475 argtype2
= ptr_type_node
;
6476 if (use_aeabi_atexit
)
6478 argtype1
= fn_ptr_type
;
6479 argtype0
= ptr_type_node
;
6483 argtype1
= ptr_type_node
;
6484 argtype0
= fn_ptr_type
;
6486 /* And the final __cxa_atexit type. */
6487 fn_type
= build_function_type_list (integer_type_node
,
6488 argtype0
, argtype1
, argtype2
,
6490 fn_ptr_type
= build_pointer_type (fn_type
);
6491 if (use_aeabi_atexit
)
6492 name
= "__aeabi_atexit";
6494 name
= "__cxa_atexit";
6498 /* The declaration for `atexit' is:
6500 int atexit (void (*)());
6502 We build up the argument types and then the function type
6504 fn_ptr_type
= get_atexit_fn_ptr_type ();
6505 /* Build the final atexit type. */
6506 fn_type
= build_function_type_list (integer_type_node
,
6507 fn_ptr_type
, NULL_TREE
);
6511 /* Now, build the function declaration. */
6512 push_lang_context (lang_name_c
);
6513 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6514 mark_used (atexit_fndecl
);
6515 pop_lang_context ();
6516 atexit_node
= decay_conversion (atexit_fndecl
);
6521 /* Returns the __dso_handle VAR_DECL. */
6524 get_dso_handle_node (void)
6526 if (dso_handle_node
)
6527 return dso_handle_node
;
6529 /* Declare the variable. */
6530 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6533 #ifdef HAVE_GAS_HIDDEN
6534 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6535 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6538 return dso_handle_node
;
6541 /* Begin a new function with internal linkage whose job will be simply
6542 to destroy some particular variable. */
6544 static GTY(()) int start_cleanup_cnt
;
6547 start_cleanup_fn (void)
6552 bool use_cxa_atexit
= flag_use_cxa_atexit
6553 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6555 push_to_top_level ();
6557 /* No need to mangle this. */
6558 push_lang_context (lang_name_c
);
6560 /* Build the name of the function. */
6561 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6562 /* Build the function declaration. */
6563 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6564 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6565 /* It's a function with internal linkage, generated by the
6567 TREE_PUBLIC (fndecl
) = 0;
6568 DECL_ARTIFICIAL (fndecl
) = 1;
6569 /* Make the function `inline' so that it is only emitted if it is
6570 actually needed. It is unlikely that it will be inlined, since
6571 it is only called via a function pointer, but we avoid unnecessary
6572 emissions this way. */
6573 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6574 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6575 /* Build the parameter. */
6580 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6581 DECL_CONTEXT (parmdecl
) = fndecl
;
6582 TREE_USED (parmdecl
) = 1;
6583 DECL_READ_P (parmdecl
) = 1;
6584 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6588 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6590 pop_lang_context ();
6592 return current_function_decl
;
6595 /* Finish the cleanup function begun by start_cleanup_fn. */
6598 end_cleanup_fn (void)
6600 expand_or_defer_fn (finish_function (0));
6602 pop_from_top_level ();
6605 /* Generate code to handle the destruction of DECL, an object with
6606 static storage duration. */
6609 register_dtor_fn (tree decl
)
6616 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6618 type
= TREE_TYPE (decl
);
6619 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6620 return void_zero_node
;
6622 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6623 a class object, we can just pass the destructor to
6624 "__cxa_atexit"; we don't have to build a temporary function to do
6626 use_dtor
= (flag_use_cxa_atexit
6627 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6628 && CLASS_TYPE_P (type
));
6633 /* Find the destructor. */
6634 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6635 gcc_assert (idx
>= 0);
6636 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6637 /* Make sure it is accessible. */
6638 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6642 /* Call build_cleanup before we enter the anonymous function so
6643 that any access checks will be done relative to the current
6644 scope, rather than the scope of the anonymous function. */
6645 build_cleanup (decl
);
6647 /* Now start the function. */
6648 cleanup
= start_cleanup_fn ();
6650 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6651 to the original function, rather than the anonymous one. That
6652 will make the back end think that nested functions are in use,
6653 which causes confusion. */
6654 push_deferring_access_checks (dk_no_check
);
6655 fcall
= build_cleanup (decl
);
6656 pop_deferring_access_checks ();
6658 /* Create the body of the anonymous function. */
6659 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6660 finish_expr_stmt (fcall
);
6661 finish_compound_stmt (compound_stmt
);
6665 /* Call atexit with the cleanup function. */
6666 mark_used (cleanup
);
6667 cleanup
= build_address (cleanup
);
6668 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6674 /* We must convert CLEANUP to the type that "__cxa_atexit"
6676 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6677 /* "__cxa_atexit" will pass the address of DECL to the
6678 cleanup function. */
6680 addr
= build_address (decl
);
6681 /* The declared type of the parameter to "__cxa_atexit" is
6682 "void *". For plain "T*", we could just let the
6683 machinery in cp_build_function_call convert it -- but if the
6684 type is "cv-qualified T *", then we need to convert it
6685 before passing it in, to avoid spurious errors. */
6686 addr
= build_nop (ptr_type_node
, addr
);
6689 /* Since the cleanup functions we build ignore the address
6690 they're given, there's no reason to pass the actual address
6691 in, and, in general, it's cheaper to pass NULL than any
6693 addr
= null_pointer_node
;
6694 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6695 tf_warning_or_error
);
6696 if (targetm
.cxx
.use_aeabi_atexit ())
6709 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6710 arg0
, arg1
, arg2
, NULL_TREE
);
6713 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6714 is its initializer. Generate code to handle the construction
6715 and destruction of DECL. */
6718 expand_static_init (tree decl
, tree init
)
6720 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6721 gcc_assert (TREE_STATIC (decl
));
6723 /* Some variables require no dynamic initialization. */
6725 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6728 if (DECL_FUNCTION_SCOPE_P (decl
))
6730 /* Emit code to perform this initialization but once. */
6731 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6732 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6733 tree guard
, guard_addr
;
6736 /* Emit code to perform this initialization but once. This code
6739 static <type> guard;
6740 if (!guard.first_byte) {
6741 if (__cxa_guard_acquire (&guard)) {
6744 // Do initialization.
6745 flag = true; __cxa_guard_release (&guard);
6746 // Register variable for destruction at end of program.
6748 if (!flag) __cxa_guard_abort (&guard);
6752 Note that the `flag' variable is only set to 1 *after* the
6753 initialization is complete. This ensures that an exception,
6754 thrown during the construction, will cause the variable to
6755 reinitialized when we pass through this code again, as per:
6759 If the initialization exits by throwing an exception, the
6760 initialization is not complete, so it will be tried again
6761 the next time control enters the declaration.
6763 This process should be thread-safe, too; multiple threads
6764 should not be able to initialize the variable more than
6767 /* Create the guard variable. */
6768 guard
= get_guard (decl
);
6770 /* This optimization isn't safe on targets with relaxed memory
6771 consistency. On such targets we force synchronization in
6772 __cxa_guard_acquire. */
6773 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6775 /* Begin the conditional initialization. */
6776 if_stmt
= begin_if_stmt ();
6777 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6778 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6781 if (flag_threadsafe_statics
)
6783 tree vfntype
= NULL_TREE
;
6784 tree acquire_name
, release_name
, abort_name
;
6785 tree acquire_fn
, release_fn
, abort_fn
;
6786 guard_addr
= build_address (guard
);
6788 acquire_name
= get_identifier ("__cxa_guard_acquire");
6789 release_name
= get_identifier ("__cxa_guard_release");
6790 abort_name
= get_identifier ("__cxa_guard_abort");
6791 acquire_fn
= identifier_global_value (acquire_name
);
6792 release_fn
= identifier_global_value (release_name
);
6793 abort_fn
= identifier_global_value (abort_name
);
6795 acquire_fn
= push_library_fn
6796 (acquire_name
, build_function_type_list (integer_type_node
,
6797 TREE_TYPE (guard_addr
),
6800 if (!release_fn
|| !abort_fn
)
6801 vfntype
= build_function_type_list (void_type_node
,
6802 TREE_TYPE (guard_addr
),
6805 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6807 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6809 inner_if_stmt
= begin_if_stmt ();
6810 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6813 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6814 begin
= get_target_expr (boolean_false_node
);
6815 flag
= TARGET_EXPR_SLOT (begin
);
6817 TARGET_EXPR_CLEANUP (begin
)
6818 = build3 (COND_EXPR
, void_type_node
, flag
,
6820 build_call_n (abort_fn
, 1, guard_addr
));
6821 CLEANUP_EH_ONLY (begin
) = 1;
6823 /* Do the initialization itself. */
6824 init
= add_stmt_to_compound (begin
, init
);
6825 init
= add_stmt_to_compound
6826 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6827 init
= add_stmt_to_compound
6828 (init
, build_call_n (release_fn
, 1, guard_addr
));
6831 init
= add_stmt_to_compound (init
, set_guard (guard
));
6833 /* Use atexit to register a function for destroying this static
6835 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6837 finish_expr_stmt (init
);
6839 if (flag_threadsafe_statics
)
6841 finish_compound_stmt (inner_then_clause
);
6842 finish_then_clause (inner_if_stmt
);
6843 finish_if_stmt (inner_if_stmt
);
6846 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6848 finish_compound_stmt (then_clause
);
6849 finish_then_clause (if_stmt
);
6850 finish_if_stmt (if_stmt
);
6854 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6858 /* Make TYPE a complete type based on INITIAL_VALUE.
6859 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6860 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6861 3 if the initializer list is empty (in pedantic mode). */
6864 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6867 tree type
, elt_type
;
6871 unsigned HOST_WIDE_INT i
;
6874 /* An array of character type can be initialized from a
6875 brace-enclosed string constant.
6877 FIXME: this code is duplicated from reshape_init. Probably
6878 we should just call reshape_init here? */
6879 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6880 && TREE_CODE (initial_value
) == CONSTRUCTOR
6881 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6883 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6884 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6886 if (TREE_CODE (value
) == STRING_CST
6887 && VEC_length (constructor_elt
, v
) == 1)
6888 initial_value
= value
;
6891 /* If any of the elements are parameter packs, we can't actually
6892 complete this type now because the array size is dependent. */
6893 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6895 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6898 if (PACK_EXPANSION_P (value
))
6904 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6906 /* We can create the array before the element type is complete, which
6907 means that we didn't have these two bits set in the original type
6908 either. In completing the type, we are expected to propagate these
6909 bits. See also complete_type which does the same thing for arrays
6912 if (TYPE_DOMAIN (type
))
6914 elt_type
= TREE_TYPE (type
);
6915 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6916 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6917 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6923 /* As above, but either give an error or reject zero-size arrays, depending
6927 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
6928 bool do_default
, tsubst_flags_t complain
)
6931 bool sfinae
= !(complain
& tf_error
);
6932 /* In SFINAE context we can't be lenient about zero-size arrays. */
6935 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
6941 /* Not an error. */;
6942 else if (failure
== 1)
6943 error ("initializer fails to determine size of %qT", *ptype
);
6944 else if (failure
== 2)
6947 error ("array size missing in %qT", *ptype
);
6949 else if (failure
== 3)
6950 error ("zero-size array %qT", *ptype
);
6951 *ptype
= error_mark_node
;
6956 /* Return zero if something is declared to be a member of type
6957 CTYPE when in the context of CUR_TYPE. STRING is the error
6958 message to print in that case. Otherwise, quietly return 1. */
6961 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6963 if (ctype
&& ctype
!= cur_type
)
6965 if (flags
== DTOR_FLAG
)
6966 error ("destructor for alien class %qT cannot be a member", ctype
);
6968 error ("constructor for alien class %qT cannot be a member", ctype
);
6974 /* Subroutine of `grokdeclarator'. */
6976 /* Generate errors possibly applicable for a given set of specifiers.
6977 This is for ARM $7.1.2. */
6980 bad_specifiers (tree object
,
6981 enum bad_spec_place type
,
6992 error ("%qD declared as a %<virtual%> variable", object
);
6994 error ("%qD declared as an %<inline%> variable", object
);
6996 error ("%<const%> and %<volatile%> function specifiers on "
6997 "%qD invalid in variable declaration", object
);
7001 error ("%qD declared as a %<virtual%> parameter", object
);
7003 error ("%qD declared as an %<inline%> parameter", object
);
7005 error ("%<const%> and %<volatile%> function specifiers on "
7006 "%qD invalid in parameter declaration", object
);
7010 error ("%qD declared as a %<virtual%> type", object
);
7012 error ("%qD declared as an %<inline%> type", object
);
7014 error ("%<const%> and %<volatile%> function specifiers on "
7015 "%qD invalid in type declaration", object
);
7019 error ("%qD declared as a %<virtual%> field", object
);
7021 error ("%qD declared as an %<inline%> field", object
);
7023 error ("%<const%> and %<volatile%> function specifiers on "
7024 "%qD invalid in field declaration", object
);
7030 error ("%q+D declared as a friend", object
);
7032 && (TREE_CODE (object
) == TYPE_DECL
7033 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7034 && !TYPE_REFFN_P (TREE_TYPE (object
))
7035 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7036 error ("%q+D declared with an exception specification", object
);
7039 /* DECL is a member function or static data member and is presently
7040 being defined. Check that the definition is taking place in a
7044 check_class_member_definition_namespace (tree decl
)
7046 /* These checks only apply to member functions and static data
7048 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7049 || TREE_CODE (decl
) == VAR_DECL
);
7050 /* We check for problems with specializations in pt.c in
7051 check_specialization_namespace, where we can issue better
7053 if (processing_specialization
)
7055 /* There are no restrictions on the placement of
7056 explicit instantiations. */
7057 if (processing_explicit_instantiation
)
7061 A member function definition that appears outside of the
7062 class definition shall appear in a namespace scope enclosing
7063 the class definition.
7067 The definition for a static data member shall appear in a
7068 namespace scope enclosing the member's class definition. */
7069 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7070 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7071 decl
, DECL_CONTEXT (decl
));
7074 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7075 METHOD_TYPE for a non-static member function; QUALS are the
7076 cv-qualifiers that apply to the function. */
7079 build_this_parm (tree type
, cp_cv_quals quals
)
7084 cp_cv_quals this_quals
;
7086 if (CLASS_TYPE_P (type
))
7089 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7090 this_type
= build_pointer_type (this_type
);
7093 this_type
= type_of_this_parm (type
);
7094 /* The `this' parameter is implicitly `const'; it cannot be
7096 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7097 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7098 parm
= build_artificial_parm (this_identifier
, qual_type
);
7099 cp_apply_type_quals_to_decl (this_quals
, parm
);
7103 /* DECL is a static member function. Complain if it was declared
7104 with function-cv-quals. */
7107 check_static_quals (tree decl
, cp_cv_quals quals
)
7109 if (quals
!= TYPE_UNQUALIFIED
)
7110 error ("static member function %q#D declared with type qualifiers",
7114 /* CTYPE is class type, or null if non-class.
7115 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7117 DECLARATOR is the function's name.
7118 PARMS is a chain of PARM_DECLs for the function.
7119 VIRTUALP is truthvalue of whether the function is virtual or not.
7120 FLAGS are to be passed through to `grokclassfn'.
7121 QUALS are qualifiers indicating whether the function is `const'
7123 RAISES is a list of exceptions that this function can raise.
7124 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7125 not look, and -1 if we should not call `grokclassfn' at all.
7127 SFK is the kind of special function (if any) for the new function.
7129 Returns `NULL_TREE' if something goes wrong, after issuing
7130 applicable error messages. */
7133 grokfndecl (tree ctype
,
7137 tree orig_declarator
,
7139 enum overload_flags flags
,
7146 special_function_kind sfk
,
7151 location_t location
)
7154 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7158 type
= build_exception_variant (type
, raises
);
7160 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7162 /* If we have an explicit location, use it, otherwise use whatever
7163 build_lang_decl used (probably input_location). */
7164 if (location
!= UNKNOWN_LOCATION
)
7165 DECL_SOURCE_LOCATION (decl
) = location
;
7167 if (TREE_CODE (type
) == METHOD_TYPE
)
7170 parm
= build_this_parm (type
, quals
);
7171 DECL_CHAIN (parm
) = parms
;
7174 DECL_ARGUMENTS (decl
) = parms
;
7175 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7176 DECL_CONTEXT (t
) = decl
;
7177 /* Propagate volatile out from type to decl. */
7178 if (TYPE_VOLATILE (type
))
7179 TREE_THIS_VOLATILE (decl
) = 1;
7181 /* Setup decl according to sfk. */
7184 case sfk_constructor
:
7185 case sfk_copy_constructor
:
7186 case sfk_move_constructor
:
7187 DECL_CONSTRUCTOR_P (decl
) = 1;
7189 case sfk_destructor
:
7190 DECL_DESTRUCTOR_P (decl
) = 1;
7196 /* If pointers to member functions use the least significant bit to
7197 indicate whether a function is virtual, ensure a pointer
7198 to this function will have that bit clear. */
7199 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7200 && TREE_CODE (type
) == METHOD_TYPE
7201 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7202 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7205 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7209 ("defining explicit specialization %qD in friend declaration",
7213 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7214 tree args
= TREE_OPERAND (orig_declarator
, 1);
7216 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7218 /* Something like `template <class T> friend void f<T>()'. */
7219 error ("invalid use of template-id %qD in declaration "
7220 "of primary template",
7226 /* A friend declaration of the form friend void f<>(). Record
7227 the information in the TEMPLATE_ID_EXPR. */
7228 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7230 if (TREE_CODE (fns
) == COMPONENT_REF
)
7232 /* Due to bison parser ickiness, we will have already looked
7233 up an operator_name or PFUNCNAME within the current class
7234 (see template_id in parse.y). If the current class contains
7235 such a name, we'll get a COMPONENT_REF here. Undo that. */
7237 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7238 == current_class_type
);
7239 fns
= TREE_OPERAND (fns
, 1);
7241 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7242 || TREE_CODE (fns
) == OVERLOAD
);
7243 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7245 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7246 if (TREE_PURPOSE (t
)
7247 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7249 error ("default arguments are not allowed in declaration "
7250 "of friend template specialization %qD",
7257 error ("%<inline%> is not allowed in declaration of friend "
7258 "template specialization %qD",
7265 /* If this decl has namespace scope, set that up. */
7267 set_decl_namespace (decl
, in_namespace
, friendp
);
7269 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7271 /* `main' and builtins have implicit 'C' linkage. */
7272 if ((MAIN_NAME_P (declarator
)
7273 || (IDENTIFIER_LENGTH (declarator
) > 10
7274 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7275 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7276 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7277 && current_lang_name
== lang_name_cplusplus
7278 && ctype
== NULL_TREE
7279 && DECL_FILE_SCOPE_P (decl
))
7280 SET_DECL_LANGUAGE (decl
, lang_c
);
7282 /* Should probably propagate const out from type to decl I bet (mrs). */
7285 DECL_STATIC_FUNCTION_P (decl
) = 1;
7286 DECL_CONTEXT (decl
) = ctype
;
7291 DECL_CONTEXT (decl
) = ctype
;
7293 check_class_member_definition_namespace (decl
);
7296 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7298 if (processing_template_decl
)
7299 error ("cannot declare %<::main%> to be a template");
7301 error ("cannot declare %<::main%> to be inline");
7303 error ("cannot declare %<::main%> to be static");
7308 /* Members of anonymous types and local classes have no linkage; make
7309 them internal. If a typedef is made later, this will be changed. */
7310 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7311 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7314 if (publicp
&& cxx_dialect
== cxx98
)
7316 /* [basic.link]: A name with no linkage (notably, the name of a class
7317 or enumeration declared in a local scope) shall not be used to
7318 declare an entity with linkage.
7320 DR 757 relaxes this restriction for C++0x. */
7321 t
= no_linkage_check (TREE_TYPE (decl
),
7322 /*relaxed_p=*/false);
7325 if (TYPE_ANONYMOUS_P (t
))
7327 if (DECL_EXTERN_C_P (decl
))
7328 /* Allow this; it's pretty common in C. */;
7331 permerror (input_location
, "anonymous type with no linkage "
7332 "used to declare function %q#D with linkage",
7334 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7335 permerror (input_location
, "%q+#D does not refer to the unqualified "
7336 "type, so it is not used for linkage",
7341 permerror (input_location
, "type %qT with no linkage used to "
7342 "declare function %q#D with linkage", t
, decl
);
7346 TREE_PUBLIC (decl
) = publicp
;
7349 DECL_INTERFACE_KNOWN (decl
) = 1;
7350 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7353 /* If the declaration was declared inline, mark it as such. */
7355 DECL_DECLARED_INLINE_P (decl
) = 1;
7357 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7359 DECL_EXTERNAL (decl
) = 1;
7360 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7363 ? G_("static member function %qD cannot have cv-qualifier")
7364 : G_("non-member function %qD cannot have cv-qualifier"),
7366 quals
= TYPE_UNQUALIFIED
;
7369 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7370 && !grok_op_properties (decl
, /*complain=*/true))
7372 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7374 bool long_long_unsigned_p
;
7376 const char *suffix
= NULL
;
7377 /* [over.literal]/6: Literal operators shall not have C linkage. */
7378 if (DECL_LANGUAGE (decl
) == lang_c
)
7380 error ("literal operator with C linkage");
7384 if (DECL_NAMESPACE_SCOPE_P (decl
))
7386 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7389 error ("%qD has invalid argument list", decl
);
7393 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7394 if (long_long_unsigned_p
)
7396 if (cpp_interpret_int_suffix (suffix
, strlen (suffix
)))
7397 warning (0, "integer suffix %<%s%>"
7398 " shadowed by implementation", suffix
);
7400 else if (long_double_p
)
7402 if (cpp_interpret_float_suffix (suffix
, strlen (suffix
)))
7403 warning (0, "floating point suffix %<%s%>"
7404 " shadowed by implementation", suffix
);
7409 error ("%qD must be a non-member function", decl
);
7415 /* Make the init_value nonzero so pushdecl knows this is not
7416 tentative. error_mark_node is replaced later with the BLOCK. */
7417 DECL_INITIAL (decl
) = error_mark_node
;
7419 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7420 TREE_NOTHROW (decl
) = 1;
7422 /* Caller will do the rest of this. */
7426 if (ctype
!= NULL_TREE
)
7427 grokclassfn (ctype
, decl
, flags
);
7429 decl
= check_explicit_specialization (orig_declarator
, decl
,
7432 4 * (friendp
!= 0));
7433 if (decl
== error_mark_node
)
7436 if (DECL_STATIC_FUNCTION_P (decl
))
7437 check_static_quals (decl
, quals
);
7441 cplus_decl_attributes (&decl
, *attrlist
, 0);
7442 *attrlist
= NULL_TREE
;
7445 /* Check main's type after attributes have been applied. */
7446 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7448 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7451 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7453 error ("%<::main%> must return %<int%>");
7454 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7455 TREE_TYPE (decl
) = newtype
;
7458 check_main_parameter_types (decl
);
7461 if (ctype
!= NULL_TREE
7462 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7465 tree old_decl
= check_classfn (ctype
, decl
,
7466 (processing_template_decl
7467 > template_class_depth (ctype
))
7468 ? current_template_parms
7471 if (old_decl
== error_mark_node
)
7479 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7480 /* Because grokfndecl is always supposed to return a
7481 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7482 here. We depend on our callers to figure out that its
7483 really a template that's being returned. */
7484 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7486 if (DECL_STATIC_FUNCTION_P (old_decl
)
7487 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7489 /* Remove the `this' parm added by grokclassfn. */
7490 revert_static_member_fn (decl
);
7491 check_static_quals (decl
, quals
);
7493 if (DECL_ARTIFICIAL (old_decl
))
7495 error ("definition of implicitly-declared %qD", old_decl
);
7498 else if (DECL_DEFAULTED_FN (old_decl
))
7500 error ("definition of explicitly-defaulted %q+D", decl
);
7501 error ("%q+#D explicitly defaulted here", old_decl
);
7505 /* Since we've smashed OLD_DECL to its
7506 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7507 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7508 decl
= DECL_TEMPLATE_RESULT (decl
);
7510 /* Attempt to merge the declarations. This can fail, in
7511 the case of some invalid specialization declarations. */
7512 pushed_scope
= push_scope (ctype
);
7513 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7515 pop_scope (pushed_scope
);
7518 error ("no %q#D member function declared in class %qT",
7526 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7529 if (ctype
== NULL_TREE
|| check
)
7533 DECL_VIRTUAL_P (decl
) = 1;
7538 /* decl is a FUNCTION_DECL.
7539 specifiers are the parsed virt-specifiers.
7541 Set flags to reflect the virt-specifiers.
7546 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7548 if (decl
== NULL_TREE
)
7550 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7551 DECL_OVERRIDE_P (decl
) = 1;
7552 if (specifiers
& VIRT_SPEC_FINAL
)
7553 DECL_FINAL_P (decl
) = 1;
7557 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7558 the linkage that DECL will receive in the object file. */
7561 set_linkage_for_static_data_member (tree decl
)
7563 /* A static data member always has static storage duration and
7564 external linkage. Note that static data members are forbidden in
7565 local classes -- the only situation in which a class has
7566 non-external linkage. */
7567 TREE_PUBLIC (decl
) = 1;
7568 TREE_STATIC (decl
) = 1;
7569 /* For non-template classes, static data members are always put
7570 out in exactly those files where they are defined, just as
7571 with ordinary namespace-scope variables. */
7572 if (!processing_template_decl
)
7573 DECL_INTERFACE_KNOWN (decl
) = 1;
7576 /* Create a VAR_DECL named NAME with the indicated TYPE.
7578 If SCOPE is non-NULL, it is the class type or namespace containing
7579 the variable. If SCOPE is NULL, the variable should is created in
7580 the innermost enclosings scope. */
7583 grokvardecl (tree type
,
7585 const cp_decl_specifier_seq
*declspecs
,
7591 tree explicit_scope
;
7593 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7595 /* Compute the scope in which to place the variable, but remember
7596 whether or not that scope was explicitly specified by the user. */
7597 explicit_scope
= scope
;
7600 /* An explicit "extern" specifier indicates a namespace-scope
7602 if (declspecs
->storage_class
== sc_extern
)
7603 scope
= current_decl_namespace ();
7604 else if (!at_function_scope_p ())
7605 scope
= current_scope ();
7609 && (/* If the variable is a namespace-scope variable declared in a
7610 template, we need DECL_LANG_SPECIFIC. */
7611 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7612 /* Similarly for namespace-scope variables with language linkage
7614 || (TREE_CODE (scope
) == NAMESPACE_DECL
7615 && current_lang_name
!= lang_name_cplusplus
)
7616 /* Similarly for static data members. */
7618 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7620 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7622 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7623 set_decl_namespace (decl
, explicit_scope
, 0);
7625 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7627 if (declspecs
->storage_class
== sc_extern
)
7629 DECL_THIS_EXTERN (decl
) = 1;
7630 DECL_EXTERNAL (decl
) = !initialized
;
7633 if (DECL_CLASS_SCOPE_P (decl
))
7635 set_linkage_for_static_data_member (decl
);
7636 /* This function is only called with out-of-class definitions. */
7637 DECL_EXTERNAL (decl
) = 0;
7638 check_class_member_definition_namespace (decl
);
7640 /* At top level, either `static' or no s.c. makes a definition
7641 (perhaps tentative), and absence of `static' makes it public. */
7642 else if (toplevel_bindings_p ())
7644 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7645 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7646 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7648 /* Not at top level, only `static' makes a static definition. */
7651 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7652 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7655 if (declspecs
->specs
[(int)ds_thread
])
7656 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7658 /* If the type of the decl has no linkage, make sure that we'll
7659 notice that in mark_used. */
7660 if (cxx_dialect
> cxx98
7661 && decl_linkage (decl
) != lk_none
7662 && DECL_LANG_SPECIFIC (decl
) == NULL
7663 && !DECL_EXTERN_C_P (decl
)
7664 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7665 retrofit_lang_decl (decl
);
7667 if (TREE_PUBLIC (decl
))
7669 /* [basic.link]: A name with no linkage (notably, the name of a class
7670 or enumeration declared in a local scope) shall not be used to
7671 declare an entity with linkage.
7673 DR 757 relaxes this restriction for C++0x. */
7674 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7675 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7678 if (TYPE_ANONYMOUS_P (t
))
7680 if (DECL_EXTERN_C_P (decl
))
7681 /* Allow this; it's pretty common in C. */
7685 /* DRs 132, 319 and 389 seem to indicate types with
7686 no linkage can only be used to declare extern "C"
7687 entities. Since it's not always an error in the
7688 ISO C++ 90 Standard, we only issue a warning. */
7689 warning (0, "anonymous type with no linkage used to declare "
7690 "variable %q#D with linkage", decl
);
7691 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7692 warning (0, "%q+#D does not refer to the unqualified "
7693 "type, so it is not used for linkage",
7698 warning (0, "type %qT with no linkage used to declare variable "
7699 "%q#D with linkage", t
, decl
);
7703 DECL_INTERFACE_KNOWN (decl
) = 1;
7708 /* Create and return a canonical pointer to member function type, for
7709 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7712 build_ptrmemfunc_type (tree type
)
7716 tree unqualified_variant
= NULL_TREE
;
7718 if (type
== error_mark_node
)
7721 /* If a canonical type already exists for this type, use it. We use
7722 this method instead of type_hash_canon, because it only does a
7723 simple equality check on the list of field members. */
7725 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7728 /* Make sure that we always have the unqualified pointer-to-member
7730 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7732 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7734 t
= make_class_type (RECORD_TYPE
);
7735 xref_basetypes (t
, NULL_TREE
);
7737 /* Let the front end know this is a pointer to member function... */
7738 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7739 /* ... and not really a class type. */
7740 SET_CLASS_TYPE_P (t
, 0);
7742 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7745 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7747 DECL_CHAIN (field
) = fields
;
7750 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7752 /* Zap out the name so that the back end will give us the debugging
7753 information for this anonymous RECORD_TYPE. */
7754 TYPE_NAME (t
) = NULL_TREE
;
7756 /* If this is not the unqualified form of this pointer-to-member
7757 type, set the TYPE_MAIN_VARIANT for this type to be the
7758 unqualified type. Since they are actually RECORD_TYPEs that are
7759 not variants of each other, we must do this manually.
7760 As we just built a new type there is no need to do yet another copy. */
7761 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7763 int type_quals
= cp_type_quals (type
);
7764 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7765 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7766 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7767 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7768 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7769 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7770 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7773 /* Cache this pointer-to-member type so that we can find it again
7775 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7777 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7778 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7779 else if (TYPE_CANONICAL (type
) != type
)
7780 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7785 /* Create and return a pointer to data member type. */
7788 build_ptrmem_type (tree class_type
, tree member_type
)
7790 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7792 cp_cv_quals quals
= type_memfn_quals (member_type
);
7793 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7794 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7798 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7799 return build_offset_type (class_type
, member_type
);
7803 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7804 Check to see that the definition is valid. Issue appropriate error
7805 messages. Return 1 if the definition is particularly bad, or 0
7809 check_static_variable_definition (tree decl
, tree type
)
7811 /* Can't check yet if we don't know the type. */
7812 if (dependent_type_p (type
))
7814 /* If DECL is declared constexpr, we'll do the appropriate checks
7815 in check_initializer. */
7816 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
7818 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7820 if (!COMPLETE_TYPE_P (type
))
7821 error ("in-class initialization of static data member %q#D of "
7822 "incomplete type", decl
);
7823 else if (literal_type_p (type
))
7824 permerror (input_location
,
7825 "%<constexpr%> needed for in-class initialization of "
7826 "static data member %q#D of non-integral type", decl
);
7828 error ("in-class initialization of static data member %q#D of "
7829 "non-literal type", decl
);
7833 /* Motion 10 at San Diego: If a static const integral data member is
7834 initialized with an integral constant expression, the initializer
7835 may appear either in the declaration (within the class), or in
7836 the definition, but not both. If it appears in the class, the
7837 member is a member constant. The file-scope definition is always
7839 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7841 error ("invalid in-class initialization of static data member "
7842 "of non-integral type %qT",
7846 else if (!CP_TYPE_CONST_P (type
))
7847 error ("ISO C++ forbids in-class initialization of non-const "
7848 "static member %qD",
7850 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7851 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7852 "%qD of non-integral type %qT", decl
, type
);
7857 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7858 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7859 expressions out into temporary variables so that walk_tree doesn't
7860 step into them (c++/15764). */
7863 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
7865 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
7866 tree expr
= *expr_p
;
7867 if (TREE_CODE (expr
) == SAVE_EXPR
)
7869 tree op
= TREE_OPERAND (expr
, 0);
7870 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
7871 if (TREE_SIDE_EFFECTS (op
))
7872 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
7875 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
7880 /* Entry point for the above. */
7883 stabilize_vla_size (tree size
)
7885 struct pointer_set_t
*pset
= pointer_set_create ();
7886 /* Break out any function calls into temporary variables. */
7887 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
7890 /* Given the SIZE (i.e., number of elements) in an array, compute an
7891 appropriate index type for the array. If non-NULL, NAME is the
7892 name of the thing being declared. */
7895 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
7900 tree abi_1_itype
= NULL_TREE
;
7902 if (error_operand_p (size
))
7903 return error_mark_node
;
7905 type
= TREE_TYPE (size
);
7906 /* type_dependent_expression_p? */
7907 if (!dependent_type_p (type
))
7909 mark_rvalue_use (size
);
7911 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
7912 && TREE_SIDE_EFFECTS (size
))
7913 /* In C++98, we mark a non-constant array bound with a magic
7914 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7917 size
= fold_non_dependent_expr (size
);
7919 if (CLASS_TYPE_P (type
)
7920 && CLASSTYPE_LITERAL_P (type
))
7922 size
= build_expr_type_conversion (WANT_INT
, size
, true);
7925 if (!(complain
& tf_error
))
7926 return error_mark_node
;
7928 error ("size of array %qD has non-integral type %qT",
7931 error ("size of array has non-integral type %qT", type
);
7932 size
= integer_one_node
;
7934 if (size
== error_mark_node
)
7935 return error_mark_node
;
7936 type
= TREE_TYPE (size
);
7937 /* We didn't support this case in GCC 3.2, so don't bother
7938 trying to model it now in ABI v1. */
7939 abi_1_itype
= error_mark_node
;
7942 size
= maybe_constant_value (size
);
7943 if (!TREE_CONSTANT (size
))
7947 if (error_operand_p (size
))
7948 return error_mark_node
;
7950 /* The array bound must be an integer type. */
7951 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7953 if (!(complain
& tf_error
))
7954 return error_mark_node
;
7956 error ("size of array %qD has non-integral type %qT", name
, type
);
7958 error ("size of array has non-integral type %qT", type
);
7959 size
= integer_one_node
;
7960 type
= TREE_TYPE (size
);
7964 /* A type is dependent if it is...an array type constructed from any
7965 dependent type or whose size is specified by a constant expression
7966 that is value-dependent. */
7967 /* We can only call value_dependent_expression_p on integral constant
7968 expressions; treat non-constant expressions as dependent, too. */
7969 if (processing_template_decl
7970 && (dependent_type_p (type
)
7971 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
7973 /* We cannot do any checking for a SIZE that isn't known to be
7974 constant. Just build the index type and mark that it requires
7975 structural equality checks. */
7976 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7977 size
, integer_one_node
));
7978 TYPE_DEPENDENT_P (itype
) = 1;
7979 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7980 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7984 if (!abi_version_at_least (2) && processing_template_decl
7985 && abi_1_itype
== NULL_TREE
)
7986 /* For abi-1, we handled all instances in templates the same way,
7987 even when they were non-dependent. This affects the manglings
7988 produced. So, we do the normal checking for non-dependent
7989 sizes, but at the end we'll return the same type that abi-1
7990 would have, but with TYPE_CANONICAL set to the "right"
7991 value that the current ABI would provide. */
7992 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7993 osize
, integer_one_node
));
7995 /* Normally, the array-bound will be a constant. */
7996 if (TREE_CODE (size
) == INTEGER_CST
)
7998 /* Check to see if the array bound overflowed. Make that an
7999 error, no matter how generous we're being. */
8000 constant_expression_error (size
);
8002 /* An array must have a positive number of elements. */
8003 if (INT_CST_LT (size
, integer_zero_node
))
8005 if (!(complain
& tf_error
))
8006 return error_mark_node
;
8008 error ("size of array %qD is negative", name
);
8010 error ("size of array is negative");
8011 size
= integer_one_node
;
8013 /* As an extension we allow zero-sized arrays. */
8014 else if (integer_zerop (size
))
8016 if (!(complain
& tf_error
))
8017 /* We must fail if performing argument deduction (as
8018 indicated by the state of complain), so that
8019 another substitution can be found. */
8020 return error_mark_node
;
8021 else if (in_system_header
)
8022 /* Allow them in system headers because glibc uses them. */;
8024 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
8026 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
8029 else if (TREE_CONSTANT (size
)
8030 /* We don't allow VLAs at non-function scopes, or during
8031 tentative template substitution. */
8032 || !at_function_scope_p () || !(complain
& tf_error
))
8034 if (!(complain
& tf_error
))
8035 return error_mark_node
;
8036 /* `(int) &fn' is not a valid array bound. */
8038 error ("size of array %qD is not an integral constant-expression",
8041 error ("size of array is not an integral constant-expression");
8042 size
= integer_one_node
;
8044 else if (pedantic
&& warn_vla
!= 0)
8047 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8049 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8051 else if (warn_vla
> 0)
8055 "variable length array %qD is used", name
);
8058 "variable length array is used");
8061 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8062 /* A variable sized array. */
8063 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8066 HOST_WIDE_INT saved_processing_template_decl
;
8068 /* Compute the index of the largest element in the array. It is
8069 one less than the number of elements in the array. We save
8070 and restore PROCESSING_TEMPLATE_DECL so that computations in
8071 cp_build_binary_op will be appropriately folded. */
8072 saved_processing_template_decl
= processing_template_decl
;
8073 processing_template_decl
= 0;
8074 itype
= cp_build_binary_op (input_location
,
8076 cp_convert (ssizetype
, size
),
8077 cp_convert (ssizetype
, integer_one_node
),
8078 tf_warning_or_error
);
8079 itype
= fold (itype
);
8080 processing_template_decl
= saved_processing_template_decl
;
8082 if (!TREE_CONSTANT (itype
))
8083 /* A variable sized array. */
8084 itype
= variable_size (itype
);
8085 /* Make sure that there was no overflow when creating to a signed
8086 index type. (For example, on a 32-bit machine, an array with
8087 size 2^32 - 1 is too big.) */
8088 else if (TREE_CODE (itype
) == INTEGER_CST
8089 && TREE_OVERFLOW (itype
))
8091 if (!(complain
& tf_error
))
8092 return error_mark_node
;
8093 error ("overflow in array dimension");
8094 TREE_OVERFLOW (itype
) = 0;
8098 /* Create and return the appropriate index type. */
8099 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8101 tree t
= build_index_type (itype
);
8102 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8103 itype
= abi_1_itype
;
8106 itype
= build_index_type (itype
);
8108 /* If the index type were dependent, we would have returned early, so
8109 remember that it isn't. */
8110 TYPE_DEPENDENT_P (itype
) = 0;
8111 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8115 /* Returns the scope (if any) in which the entity declared by
8116 DECLARATOR will be located. If the entity was declared with an
8117 unqualified name, NULL_TREE is returned. */
8120 get_scope_of_declarator (const cp_declarator
*declarator
)
8122 while (declarator
&& declarator
->kind
!= cdk_id
)
8123 declarator
= declarator
->declarator
;
8125 /* If the declarator-id is a SCOPE_REF, the scope in which the
8126 declaration occurs is the first operand. */
8128 && declarator
->u
.id
.qualifying_scope
)
8129 return declarator
->u
.id
.qualifying_scope
;
8131 /* Otherwise, the declarator is not a qualified name; the entity will
8132 be declared in the current scope. */
8136 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8137 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8141 create_array_type_for_decl (tree name
, tree type
, tree size
)
8143 tree itype
= NULL_TREE
;
8145 /* If things have already gone awry, bail now. */
8146 if (type
== error_mark_node
|| size
== error_mark_node
)
8147 return error_mark_node
;
8149 /* 8.3.4/1: If the type of the identifier of D contains the auto
8150 type-specifier, the program is ill-formed. */
8151 if (pedantic
&& type_uses_auto (type
))
8152 pedwarn (input_location
, OPT_pedantic
,
8153 "declaration of %qD as array of %<auto%>", name
);
8155 /* If there are some types which cannot be array elements,
8156 issue an error-message and return. */
8157 switch (TREE_CODE (type
))
8161 error ("declaration of %qD as array of void", name
);
8163 error ("creating array of void");
8164 return error_mark_node
;
8168 error ("declaration of %qD as array of functions", name
);
8170 error ("creating array of functions");
8171 return error_mark_node
;
8173 case REFERENCE_TYPE
:
8175 error ("declaration of %qD as array of references", name
);
8177 error ("creating array of references");
8178 return error_mark_node
;
8182 error ("declaration of %qD as array of function members", name
);
8184 error ("creating array of function members");
8185 return error_mark_node
;
8193 The constant expressions that specify the bounds of the arrays
8194 can be omitted only for the first member of the sequence. */
8195 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8198 error ("declaration of %qD as multidimensional array must "
8199 "have bounds for all dimensions except the first",
8202 error ("multidimensional array must have bounds for all "
8203 "dimensions except the first");
8205 return error_mark_node
;
8208 /* Figure out the index type for the array. */
8210 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8213 T is called the array element type; this type shall not be [...] an
8214 abstract class type. */
8215 abstract_virtuals_error (name
, type
);
8217 return build_cplus_array_type (type
, itype
);
8220 /* Check that it's OK to declare a function with the indicated TYPE.
8221 SFK indicates the kind of special function (if any) that this
8222 function is. OPTYPE is the type given in a conversion operator
8223 declaration, or the class type for a constructor/destructor.
8224 Returns the actual return type of the function; that
8225 may be different than TYPE if an error occurs, or for certain
8226 special functions. */
8229 check_special_function_return_type (special_function_kind sfk
,
8235 case sfk_constructor
:
8237 error ("return type specification for constructor invalid");
8239 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8240 type
= build_pointer_type (optype
);
8242 type
= void_type_node
;
8245 case sfk_destructor
:
8247 error ("return type specification for destructor invalid");
8248 /* We can't use the proper return type here because we run into
8249 problems with ambiguous bases and covariant returns.
8250 Java classes are left unchanged because (void *) isn't a valid
8251 Java type, and we don't want to change the Java ABI. */
8252 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8253 type
= build_pointer_type (void_type_node
);
8255 type
= void_type_node
;
8258 case sfk_conversion
:
8260 error ("return type specified for %<operator %T%>", optype
);
8271 /* A variable or data member (whose unqualified name is IDENTIFIER)
8272 has been declared with the indicated TYPE. If the TYPE is not
8273 acceptable, issue an error message and return a type to use for
8274 error-recovery purposes. */
8277 check_var_type (tree identifier
, tree type
)
8279 if (VOID_TYPE_P (type
))
8282 error ("unnamed variable or field declared void");
8283 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8285 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8286 error ("variable or field %qE declared void", identifier
);
8289 error ("variable or field declared void");
8290 type
= error_mark_node
;
8296 /* Given declspecs and a declarator (abstract or otherwise), determine
8297 the name and type of the object declared and construct a DECL node
8300 DECLSPECS points to the representation of declaration-specifier
8301 sequence that precedes declarator.
8303 DECL_CONTEXT says which syntactic context this declaration is in:
8304 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8305 FUNCDEF for a function definition. Like NORMAL but a few different
8306 error messages in each case. Return value may be zero meaning
8307 this definition is too screwy to try to parse.
8308 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8309 handle member functions (which have FIELD context).
8310 Return value may be zero meaning this definition is too screwy to
8312 PARM for a parameter declaration (either within a function prototype
8313 or before a function body). Make a PARM_DECL, or return void_type_node.
8314 TPARM for a template parameter declaration.
8315 CATCHPARM for a parameter declaration before a catch clause.
8316 TYPENAME if for a typename (in a cast or sizeof).
8317 Don't make a DECL node; just return the ..._TYPE node.
8318 FIELD for a struct or union field; make a FIELD_DECL.
8319 BITFIELD for a field with specified width.
8321 INITIALIZED is as for start_decl.
8323 ATTRLIST is a pointer to the list of attributes, which may be NULL
8324 if there are none; *ATTRLIST may be modified if attributes from inside
8325 the declarator should be applied to the declaration.
8327 When this function is called, scoping variables (such as
8328 CURRENT_CLASS_TYPE) should reflect the scope in which the
8329 declaration occurs, not the scope in which the new declaration will
8330 be placed. For example, on:
8334 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8337 Returns a DECL (if a declarator is present), a TYPE (if there is no
8338 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8342 grokdeclarator (const cp_declarator
*declarator
,
8343 const cp_decl_specifier_seq
*declspecs
,
8344 enum decl_context decl_context
,
8348 tree type
= NULL_TREE
;
8350 int explicit_int128
= 0;
8351 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8352 int explicit_int
= 0;
8353 int explicit_char
= 0;
8354 int defaulted_int
= 0;
8355 tree dependent_name
= NULL_TREE
;
8357 tree typedef_decl
= NULL_TREE
;
8358 const char *name
= NULL
;
8359 tree typedef_type
= NULL_TREE
;
8360 /* True if this declarator is a function definition. */
8361 bool funcdef_flag
= false;
8362 cp_declarator_kind innermost_code
= cdk_error
;
8365 /* See the code below that used this. */
8366 tree decl_attr
= NULL_TREE
;
8369 /* Keep track of what sort of function is being processed
8370 so that we can warn about default return values, or explicit
8371 return values which do not match prescribed defaults. */
8372 special_function_kind sfk
= sfk_none
;
8374 tree dname
= NULL_TREE
;
8375 tree ctor_return_type
= NULL_TREE
;
8376 enum overload_flags flags
= NO_SPECIAL
;
8377 /* cv-qualifiers that apply to the declarator, for a declaration of
8378 a member function. */
8379 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8380 /* virt-specifiers that apply to the declarator, for a declaration of
8381 a member function. */
8382 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8383 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8385 tree raises
= NULL_TREE
;
8386 int template_count
= 0;
8387 tree returned_attrs
= NULL_TREE
;
8388 tree parms
= NULL_TREE
;
8389 const cp_declarator
*id_declarator
;
8390 /* The unqualified name of the declarator; either an
8391 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8392 tree unqualified_id
;
8393 /* The class type, if any, in which this entity is located,
8394 or NULL_TREE if none. Note that this value may be different from
8395 the current class type; for example if an attempt is made to declare
8396 "A::f" inside "B", this value will be "A". */
8397 tree ctype
= current_class_type
;
8398 /* The NAMESPACE_DECL for the namespace in which this entity is
8399 located. If an unqualified name is used to declare the entity,
8400 this value will be NULL_TREE, even if the entity is located at
8402 tree in_namespace
= NULL_TREE
;
8403 cp_storage_class storage_class
;
8404 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8405 bool type_was_error_mark_node
= false;
8406 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8407 bool template_type_arg
= false;
8408 bool template_parm_flag
= false;
8409 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
8412 signed_p
= declspecs
->specs
[(int)ds_signed
];
8413 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
8414 short_p
= declspecs
->specs
[(int)ds_short
];
8415 long_p
= declspecs
->specs
[(int)ds_long
];
8416 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
8417 explicit_int128
= declspecs
->explicit_int128_p
;
8418 thread_p
= declspecs
->specs
[(int)ds_thread
];
8420 if (decl_context
== FUNCDEF
)
8421 funcdef_flag
= true, decl_context
= NORMAL
;
8422 else if (decl_context
== MEMFUNCDEF
)
8423 funcdef_flag
= true, decl_context
= FIELD
;
8424 else if (decl_context
== BITFIELD
)
8425 bitfield
= 1, decl_context
= FIELD
;
8426 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8427 template_type_arg
= true, decl_context
= TYPENAME
;
8428 else if (decl_context
== TPARM
)
8429 template_parm_flag
= true, decl_context
= PARM
;
8431 if (initialized
> 1)
8432 funcdef_flag
= true;
8434 /* Look inside a declarator for the name being declared
8435 and get it as a string, for an error message. */
8436 for (id_declarator
= declarator
;
8438 id_declarator
= id_declarator
->declarator
)
8440 if (id_declarator
->kind
!= cdk_id
)
8441 innermost_code
= id_declarator
->kind
;
8443 switch (id_declarator
->kind
)
8446 if (id_declarator
->declarator
8447 && id_declarator
->declarator
->kind
== cdk_id
)
8449 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8450 if (sfk
== sfk_destructor
)
8457 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8458 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8461 if (qualifying_scope
)
8463 if (at_function_scope_p ())
8467 A declarator-id shall not be qualified except
8470 None of the cases are permitted in block
8472 if (qualifying_scope
== global_namespace
)
8473 error ("invalid use of qualified-name %<::%D%>",
8475 else if (TYPE_P (qualifying_scope
))
8476 error ("invalid use of qualified-name %<%T::%D%>",
8477 qualifying_scope
, decl
);
8479 error ("invalid use of qualified-name %<%D::%D%>",
8480 qualifying_scope
, decl
);
8481 return error_mark_node
;
8483 else if (TYPE_P (qualifying_scope
))
8485 ctype
= qualifying_scope
;
8486 if (!MAYBE_CLASS_TYPE_P (ctype
))
8488 error ("%q#T is not a class or a namespace", ctype
);
8491 else if (innermost_code
!= cdk_function
8492 && current_class_type
8493 && !UNIQUELY_DERIVED_FROM_P (ctype
,
8494 current_class_type
))
8496 error ("type %qT is not derived from type %qT",
8497 ctype
, current_class_type
);
8498 return error_mark_node
;
8501 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8502 in_namespace
= qualifying_scope
;
8504 switch (TREE_CODE (decl
))
8510 if (innermost_code
!= cdk_function
)
8512 error ("declaration of %qD as non-function", decl
);
8513 return error_mark_node
;
8515 else if (!qualifying_scope
8516 && !(current_class_type
&& at_class_scope_p ()))
8518 error ("declaration of %qD as non-member", decl
);
8519 return error_mark_node
;
8522 type
= TREE_OPERAND (decl
, 0);
8524 type
= constructor_name (type
);
8525 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8530 case TEMPLATE_ID_EXPR
:
8532 tree fns
= TREE_OPERAND (decl
, 0);
8535 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8537 gcc_assert (is_overloaded_fn (dname
));
8538 dname
= DECL_NAME (get_first_fn (dname
));
8543 case IDENTIFIER_NODE
:
8544 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8547 if (C_IS_RESERVED_WORD (dname
))
8549 error ("declarator-id missing; using reserved word %qD",
8551 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8553 else if (!IDENTIFIER_TYPENAME_P (dname
))
8554 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8557 gcc_assert (flags
== NO_SPECIAL
);
8558 flags
= TYPENAME_FLAG
;
8559 ctor_return_type
= TREE_TYPE (dname
);
8560 sfk
= sfk_conversion
;
8561 if (is_typename_at_global_scope (dname
))
8562 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8564 name
= "<invalid operator>";
8581 return error_mark_node
;
8586 if (id_declarator
->kind
== cdk_id
)
8592 The declarator in a function-definition shall have the form
8593 D1 ( parameter-declaration-clause) ... */
8594 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8596 error ("function definition does not declare parameters");
8597 return error_mark_node
;
8600 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8601 && innermost_code
!= cdk_function
8602 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8604 error ("declaration of %qD as non-function", dname
);
8605 return error_mark_node
;
8609 && TREE_CODE (dname
) == IDENTIFIER_NODE
8610 && UDLIT_OPER_P (dname
)
8611 && innermost_code
!= cdk_function
)
8613 error ("declaration of %qD as non-function", dname
);
8614 return error_mark_node
;
8617 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8619 if (declspecs
->specs
[(int)ds_typedef
])
8621 error ("declaration of %qD as %<typedef%>", dname
);
8622 return error_mark_node
;
8624 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8626 error ("declaration of %qD as parameter", dname
);
8627 return error_mark_node
;
8631 /* Anything declared one level down from the top level
8632 must be one of the parameters of a function
8633 (because the body is at least two levels down). */
8635 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8636 by not allowing C++ class definitions to specify their parameters
8637 with xdecls (must be spec.d in the parmlist).
8639 Since we now wait to push a class scope until we are sure that
8640 we are in a legitimate method context, we must set oldcname
8641 explicitly (since current_class_name is not yet alive).
8643 We also want to avoid calling this a PARM if it is in a namespace. */
8645 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8647 cp_binding_level
*b
= current_binding_level
;
8648 current_binding_level
= b
->level_chain
;
8649 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8650 decl_context
= PARM
;
8651 current_binding_level
= b
;
8655 name
= decl_context
== PARM
? "parameter" : "type name";
8657 if (constexpr_p
&& declspecs
->specs
[(int)ds_typedef
])
8659 error ("%<constexpr%> cannot appear in a typedef declaration");
8660 return error_mark_node
;
8663 /* If there were multiple types specified in the decl-specifier-seq,
8664 issue an error message. */
8665 if (declspecs
->multiple_types_p
)
8667 error ("two or more data types in declaration of %qs", name
);
8668 return error_mark_node
;
8671 if (declspecs
->conflicting_specifiers_p
)
8673 error ("conflicting specifiers in declaration of %qs", name
);
8674 return error_mark_node
;
8677 /* Extract the basic type from the decl-specifier-seq. */
8678 type
= declspecs
->type
;
8679 if (type
== error_mark_node
)
8682 type_was_error_mark_node
= true;
8684 /* If the entire declaration is itself tagged as deprecated then
8685 suppress reports of deprecated items. */
8686 if (type
&& TREE_DEPRECATED (type
)
8687 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8688 warn_deprecated_use (type
, NULL_TREE
);
8689 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8691 typedef_decl
= type
;
8692 type
= TREE_TYPE (typedef_decl
);
8693 if (TREE_DEPRECATED (type
)
8694 && DECL_ARTIFICIAL (typedef_decl
)
8695 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8696 warn_deprecated_use (type
, NULL_TREE
);
8698 /* No type at all: default to `int', and set DEFAULTED_INT
8699 because it was not a user-defined typedef. */
8700 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8702 /* These imply 'int'. */
8703 type
= integer_type_node
;
8707 explicit_int
= declspecs
->explicit_int_p
;
8708 explicit_char
= declspecs
->explicit_char_p
;
8711 /* See the code below that used this. */
8713 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8715 typedef_type
= type
;
8718 if (sfk
!= sfk_conversion
)
8719 ctor_return_type
= ctype
;
8721 if (sfk
!= sfk_none
)
8722 type
= check_special_function_return_type (sfk
, type
,
8724 else if (type
== NULL_TREE
)
8730 /* We handle `main' specially here, because 'main () { }' is so
8731 common. With no options, it is allowed. With -Wreturn-type,
8732 it is a warning. It is only an error with -pedantic-errors. */
8733 is_main
= (funcdef_flag
8734 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8735 && MAIN_NAME_P (dname
)
8736 && ctype
== NULL_TREE
8737 && in_namespace
== NULL_TREE
8738 && current_namespace
== global_namespace
);
8740 if (type_was_error_mark_node
)
8741 /* We've already issued an error, don't complain more. */;
8742 else if (in_system_header
|| flag_ms_extensions
)
8743 /* Allow it, sigh. */;
8745 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8747 pedwarn (input_location
, OPT_pedantic
,
8748 "ISO C++ forbids declaration of %qs with no type", name
);
8750 warning (OPT_Wreturn_type
,
8751 "ISO C++ forbids declaration of %qs with no type", name
);
8753 type
= integer_type_node
;
8758 if (explicit_int128
)
8760 if (int128_integer_type_node
== NULL_TREE
)
8762 error ("%<__int128%> is not supported by this target");
8763 explicit_int128
= false;
8765 else if (pedantic
&& ! in_system_header
)
8766 pedwarn (input_location
, OPT_pedantic
,
8767 "ISO C++ does not support %<__int128%> for %qs", name
);
8770 /* Now process the modifiers that were specified
8771 and check for invalid combinations. */
8773 /* Long double is a special combination. */
8774 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8777 type
= cp_build_qualified_type (long_double_type_node
,
8778 cp_type_quals (type
));
8781 /* Check all other uses of type modifiers. */
8783 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8787 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8788 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8789 else if (signed_p
&& unsigned_p
)
8790 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8791 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8792 error ("%<long long%> invalid for %qs", name
);
8793 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8794 error ("%<long%> invalid for %qs", name
);
8795 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8796 error ("%<short%> invalid for %qs", name
);
8797 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8798 error ("%<long%> or %<short%> invalid for %qs", name
);
8799 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8800 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8801 else if ((long_p
|| short_p
) && explicit_char
)
8802 error ("%<long%> or %<short%> specified with char for %qs", name
);
8803 else if (long_p
&& short_p
)
8804 error ("%<long%> and %<short%> specified together for %qs", name
);
8805 else if (type
== char16_type_node
|| type
== char32_type_node
)
8807 if (signed_p
|| unsigned_p
)
8808 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8809 else if (short_p
|| long_p
)
8810 error ("%<short%> or %<long%> invalid for %qs", name
);
8815 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8817 pedwarn (input_location
, OPT_pedantic
,
8818 "long, short, signed or unsigned used invalidly for %qs",
8820 if (flag_pedantic_errors
)
8825 /* Discard the type modifiers if they are invalid. */
8836 /* Decide whether an integer type is signed or not.
8837 Optionally treat bitfields as signed by default. */
8841 It is implementation-defined whether a plain (neither
8842 explicitly signed or unsigned) char, short, int, or long
8843 bit-field is signed or unsigned.
8845 Naturally, we extend this to long long as well. Note that
8846 this does not include wchar_t. */
8847 || (bitfield
&& !flag_signed_bitfields
8849 /* A typedef for plain `int' without `signed' can be
8850 controlled just like plain `int', but a typedef for
8851 `signed int' cannot be so controlled. */
8853 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8854 && TREE_CODE (type
) == INTEGER_TYPE
8855 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8857 if (explicit_int128
)
8858 type
= int128_unsigned_type_node
;
8860 type
= long_long_unsigned_type_node
;
8862 type
= long_unsigned_type_node
;
8864 type
= short_unsigned_type_node
;
8865 else if (type
== char_type_node
)
8866 type
= unsigned_char_type_node
;
8867 else if (typedef_decl
)
8868 type
= unsigned_type_for (type
);
8870 type
= unsigned_type_node
;
8872 else if (signed_p
&& type
== char_type_node
)
8873 type
= signed_char_type_node
;
8874 else if (explicit_int128
)
8875 type
= int128_integer_type_node
;
8877 type
= long_long_integer_type_node
;
8879 type
= long_integer_type_node
;
8881 type
= short_integer_type_node
;
8883 if (declspecs
->specs
[(int)ds_complex
])
8885 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8886 error ("complex invalid for %qs", name
);
8887 /* If we just have "complex", it is equivalent to
8888 "complex double", but if any modifiers at all are specified it is
8889 the complex form of TYPE. E.g, "complex short" is
8890 "complex short int". */
8891 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8892 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8893 type
= complex_double_type_node
;
8894 else if (type
== integer_type_node
)
8895 type
= complex_integer_type_node
;
8896 else if (type
== float_type_node
)
8897 type
= complex_float_type_node
;
8898 else if (type
== double_type_node
)
8899 type
= complex_double_type_node
;
8900 else if (type
== long_double_type_node
)
8901 type
= complex_long_double_type_node
;
8903 type
= build_complex_type (type
);
8906 type_quals
= TYPE_UNQUALIFIED
;
8907 if (declspecs
->specs
[(int)ds_const
])
8908 type_quals
|= TYPE_QUAL_CONST
;
8909 if (declspecs
->specs
[(int)ds_volatile
])
8910 type_quals
|= TYPE_QUAL_VOLATILE
;
8911 if (declspecs
->specs
[(int)ds_restrict
])
8912 type_quals
|= TYPE_QUAL_RESTRICT
;
8913 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8914 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8917 type_quals
|= cp_type_quals (type
);
8918 type
= cp_build_qualified_type_real
8919 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8920 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8921 /* We might have ignored or rejected some of the qualifiers. */
8922 type_quals
= cp_type_quals (type
);
8925 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8926 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8927 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8929 storage_class
= declspecs
->storage_class
;
8930 if (storage_class
== sc_static
)
8931 staticp
= 1 + (decl_context
== FIELD
);
8933 if (virtualp
&& staticp
== 2)
8935 error ("member %qD cannot be declared both virtual and static", dname
);
8936 storage_class
= sc_none
;
8939 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8941 if (dependent_name
&& !friendp
)
8943 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8944 return error_mark_node
;
8947 /* Issue errors about use of storage classes for parameters. */
8948 if (decl_context
== PARM
)
8950 if (declspecs
->specs
[(int)ds_typedef
])
8952 error ("typedef declaration invalid in parameter declaration");
8953 return error_mark_node
;
8955 else if (template_parm_flag
&& storage_class
!= sc_none
)
8957 error ("storage class specified for template parameter %qs", name
);
8958 return error_mark_node
;
8960 else if (storage_class
== sc_static
8961 || storage_class
== sc_extern
8963 error ("storage class specifiers invalid in parameter declarations");
8965 /* Function parameters cannot be constexpr. If we saw one, moan
8966 and pretend it wasn't there. */
8969 error ("a parameter cannot be declared %<constexpr%>");
8974 /* Give error if `virtual' is used outside of class declaration. */
8976 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8978 error ("%<virtual%> outside class declaration");
8982 /* Static anonymous unions are dealt with here. */
8983 if (staticp
&& decl_context
== TYPENAME
8985 && ANON_AGGR_TYPE_P (declspecs
->type
))
8986 decl_context
= FIELD
;
8988 /* Warn about storage classes that are invalid for certain
8989 kinds of declarations (parameters, typenames, etc.). */
8992 && storage_class
!= sc_extern
8993 && storage_class
!= sc_static
)
8994 || declspecs
->specs
[(int)ds_typedef
]))
8996 error ("multiple storage classes in declaration of %qs", name
);
8999 if (decl_context
!= NORMAL
9000 && ((storage_class
!= sc_none
9001 && storage_class
!= sc_mutable
)
9004 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9005 && (storage_class
== sc_register
9006 || storage_class
== sc_auto
))
9008 else if (declspecs
->specs
[(int)ds_typedef
])
9010 else if (decl_context
== FIELD
9011 /* C++ allows static class elements. */
9012 && storage_class
== sc_static
)
9013 /* C++ also allows inlines and signed and unsigned elements,
9014 but in those cases we don't come in here. */
9018 if (decl_context
== FIELD
)
9019 error ("storage class specified for %qs", name
);
9022 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9023 error ("storage class specified for parameter %qs", name
);
9025 error ("storage class specified for typename");
9027 if (storage_class
== sc_register
9028 || storage_class
== sc_auto
9029 || storage_class
== sc_extern
9031 storage_class
= sc_none
;
9034 else if (storage_class
== sc_extern
&& funcdef_flag
9035 && ! toplevel_bindings_p ())
9036 error ("nested function %qs declared %<extern%>", name
);
9037 else if (toplevel_bindings_p ())
9039 if (storage_class
== sc_auto
)
9040 error ("top-level declaration of %qs specifies %<auto%>", name
);
9043 && storage_class
!= sc_extern
9044 && storage_class
!= sc_static
)
9046 error ("function-scope %qs implicitly auto and declared %<__thread%>",
9051 if (storage_class
&& friendp
)
9053 error ("storage class specifiers invalid in friend function declarations");
9054 storage_class
= sc_none
;
9059 unqualified_id
= NULL_TREE
;
9062 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9063 switch (TREE_CODE (unqualified_id
))
9066 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9067 if (TYPE_P (unqualified_id
))
9068 unqualified_id
= constructor_name (unqualified_id
);
9071 case IDENTIFIER_NODE
:
9072 case TEMPLATE_ID_EXPR
:
9080 /* Determine the type of the entity declared by recurring on the
9082 for (; declarator
; declarator
= declarator
->declarator
)
9084 const cp_declarator
*inner_declarator
;
9087 if (type
== error_mark_node
)
9088 return error_mark_node
;
9090 attrs
= declarator
->attributes
;
9096 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9097 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9098 if (declarator
->kind
== cdk_function
)
9099 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9100 if (declarator
->kind
== cdk_array
)
9101 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9102 returned_attrs
= decl_attributes (&type
,
9103 chainon (returned_attrs
, attrs
),
9107 if (declarator
->kind
== cdk_id
)
9110 inner_declarator
= declarator
->declarator
;
9112 switch (declarator
->kind
)
9115 type
= create_array_type_for_decl (dname
, type
,
9116 declarator
->u
.array
.bounds
);
9124 /* Declaring a function type.
9125 Make sure we have a valid type for the function to return. */
9127 if (type_quals
!= TYPE_UNQUALIFIED
)
9129 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9130 warning (OPT_Wignored_qualifiers
,
9131 "type qualifiers ignored on function return type");
9132 /* We now know that the TYPE_QUALS don't apply to the
9133 decl, but to its return type. */
9134 type_quals
= TYPE_UNQUALIFIED
;
9136 errmsg
= targetm
.invalid_return_type (type
);
9140 type
= integer_type_node
;
9143 /* Error about some types functions can't return. */
9145 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9147 error ("%qs declared as function returning a function", name
);
9148 return error_mark_node
;
9150 if (TREE_CODE (type
) == ARRAY_TYPE
)
9152 error ("%qs declared as function returning an array", name
);
9153 return error_mark_node
;
9156 /* Pick up type qualifiers which should be applied to `this'. */
9157 memfn_quals
= declarator
->u
.function
.qualifiers
;
9158 /* Pick up virt-specifiers. */
9159 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9160 /* Pick up the exception specifications. */
9161 raises
= declarator
->u
.function
.exception_specification
;
9162 /* If the exception-specification is ill-formed, let's pretend
9163 there wasn't one. */
9164 if (raises
== error_mark_node
)
9167 /* Say it's a definition only for the CALL_EXPR
9168 closest to the identifier. */
9169 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9171 /* Handle a late-specified return type. */
9174 if (type_uses_auto (type
))
9176 if (!declarator
->u
.function
.late_return_type
)
9178 error ("%qs function uses %<auto%> type specifier without"
9179 " trailing return type", name
);
9180 return error_mark_node
;
9182 else if (!is_auto (type
))
9184 error ("%qs function with trailing return type has"
9185 " %qT as its type rather than plain %<auto%>",
9187 return error_mark_node
;
9190 else if (declarator
->u
.function
.late_return_type
)
9192 if (cxx_dialect
< cxx0x
)
9193 /* Not using maybe_warn_cpp0x because this should
9194 always be an error. */
9195 error ("trailing return type only available with "
9196 "-std=c++11 or -std=gnu++11");
9198 error ("%qs function with trailing return type not "
9199 "declared with %<auto%> type specifier", name
);
9200 return error_mark_node
;
9203 type
= splice_late_return_type
9204 (type
, declarator
->u
.function
.late_return_type
);
9205 if (type
== error_mark_node
)
9206 return error_mark_node
;
9208 if (ctype
== NULL_TREE
9209 && decl_context
== FIELD
9211 && (friendp
== 0 || dname
== current_class_name
))
9212 ctype
= current_class_type
;
9214 if (ctype
&& (sfk
== sfk_constructor
9215 || sfk
== sfk_destructor
))
9217 /* We are within a class's scope. If our declarator name
9218 is the same as the class name, and we are defining
9219 a function, then it is a constructor/destructor, and
9220 therefore returns a void type. */
9222 /* ISO C++ 12.4/2. A destructor may not be declared
9223 const or volatile. A destructor may not be
9226 ISO C++ 12.1. A constructor may not be declared
9227 const or volatile. A constructor may not be
9228 virtual. A constructor may not be static. */
9230 error ((flags
== DTOR_FLAG
)
9231 ? G_("destructor cannot be static member function")
9232 : G_("constructor cannot be static member function"));
9235 error ((flags
== DTOR_FLAG
)
9236 ? G_("destructors may not be cv-qualified")
9237 : G_("constructors may not be cv-qualified"));
9238 memfn_quals
= TYPE_UNQUALIFIED
;
9241 if (decl_context
== FIELD
9242 && !member_function_or_else (ctype
,
9245 return error_mark_node
;
9247 if (flags
!= DTOR_FLAG
)
9249 /* It's a constructor. */
9254 permerror (input_location
, "constructors cannot be declared virtual");
9257 if (decl_context
== FIELD
9258 && sfk
!= sfk_constructor
)
9259 return error_mark_node
;
9261 if (decl_context
== FIELD
)
9267 error ("can%'t initialize friend function %qs", name
);
9270 /* Cannot be both friend and virtual. */
9271 error ("virtual functions cannot be friends");
9274 if (decl_context
== NORMAL
)
9275 error ("friend declaration not in class definition");
9276 if (current_function_decl
&& funcdef_flag
)
9277 error ("can%'t define friend function %qs in a local "
9281 else if (ctype
&& sfk
== sfk_conversion
)
9285 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9290 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9293 if (inner_declarator
9294 && inner_declarator
->kind
== cdk_id
9295 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9296 && arg_types
!= void_list_node
)
9298 error ("destructors may not have parameters");
9299 arg_types
= void_list_node
;
9303 type
= build_function_type (type
, arg_types
);
9310 /* Filter out pointers-to-references and references-to-references.
9311 We can get these if a TYPE_DECL is used. */
9313 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9315 if (declarator
->kind
!= cdk_reference
)
9317 error ("cannot declare pointer to %q#T", type
);
9318 type
= TREE_TYPE (type
);
9321 /* In C++0x, we allow reference to reference declarations
9322 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9323 and template type arguments [14.3.1/4 temp.arg.type]. The
9324 check for direct reference to reference declarations, which
9325 are still forbidden, occurs below. Reasoning behind the change
9326 can be found in DR106, DR540, and the rvalue reference
9328 else if (cxx_dialect
== cxx98
)
9330 error ("cannot declare reference to %q#T", type
);
9331 type
= TREE_TYPE (type
);
9334 else if (VOID_TYPE_P (type
))
9336 if (declarator
->kind
== cdk_reference
)
9337 error ("cannot declare reference to %q#T", type
);
9338 else if (declarator
->kind
== cdk_ptrmem
)
9339 error ("cannot declare pointer to %q#T member", type
);
9342 /* We now know that the TYPE_QUALS don't apply to the decl,
9343 but to the target of the pointer. */
9344 type_quals
= TYPE_UNQUALIFIED
;
9346 if (declarator
->kind
== cdk_ptrmem
9347 && (TREE_CODE (type
) == FUNCTION_TYPE
9348 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9350 memfn_quals
|= type_memfn_quals (type
);
9351 type
= build_memfn_type (type
,
9352 declarator
->u
.pointer
.class_type
,
9354 if (type
== error_mark_node
)
9355 return error_mark_node
;
9356 memfn_quals
= TYPE_UNQUALIFIED
;
9359 if (TREE_CODE (type
) == FUNCTION_TYPE
9360 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9361 error (declarator
->kind
== cdk_reference
9362 ? G_("cannot declare reference to qualified function type %qT")
9363 : G_("cannot declare pointer to qualified function type %qT"),
9366 /* When the pointed-to type involves components of variable size,
9367 care must be taken to ensure that the size evaluation code is
9368 emitted early enough to dominate all the possible later uses
9369 and late enough for the variables on which it depends to have
9372 This is expected to happen automatically when the pointed-to
9373 type has a name/declaration of it's own, but special attention
9374 is required if the type is anonymous.
9376 We handle the NORMAL and FIELD contexts here by inserting a
9377 dummy statement that just evaluates the size at a safe point
9378 and ensures it is not deferred until e.g. within a deeper
9379 conditional context (c++/43555).
9381 We expect nothing to be needed here for PARM or TYPENAME.
9382 Evaluating the size at this point for TYPENAME would
9383 actually be incorrect, as we might be in the middle of an
9384 expression with side effects on the pointed-to type size
9385 "arguments" prior to the pointer declaration point and the
9386 size evaluation could end up prior to the side effects. */
9388 if (!TYPE_NAME (type
)
9389 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9390 && at_function_scope_p ()
9391 && variably_modified_type_p (type
, NULL_TREE
))
9393 /* First break out any side-effects. */
9394 stabilize_vla_size (TYPE_SIZE (type
));
9395 /* And then force evaluation of the SAVE_EXPR. */
9396 finish_expr_stmt (TYPE_SIZE (type
));
9399 if (declarator
->kind
== cdk_reference
)
9401 /* In C++0x, the type we are creating a reference to might be
9402 a typedef which is itself a reference type. In that case,
9403 we follow the reference collapsing rules in
9404 [7.1.3/8 dcl.typedef] to create the final reference type:
9406 "If a typedef TD names a type that is a reference to a type
9407 T, an attempt to create the type 'lvalue reference to cv TD'
9408 creates the type 'lvalue reference to T,' while an attempt
9409 to create the type "rvalue reference to cv TD' creates the
9412 if (VOID_TYPE_P (type
))
9413 /* We already gave an error. */;
9414 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9416 if (declarator
->u
.reference
.rvalue_ref
)
9417 /* Leave type alone. */;
9419 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9422 type
= cp_build_reference_type
9423 (type
, declarator
->u
.reference
.rvalue_ref
);
9425 /* In C++0x, we need this check for direct reference to
9426 reference declarations, which are forbidden by
9427 [8.3.2/5 dcl.ref]. Reference to reference declarations
9428 are only allowed indirectly through typedefs and template
9429 type arguments. Example:
9431 void foo(int & &); // invalid ref-to-ref decl
9433 typedef int & int_ref;
9434 void foo(int_ref &); // valid ref-to-ref decl
9436 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9437 error ("cannot declare reference to %q#T, which is not "
9438 "a typedef or a template type argument", type
);
9440 else if (TREE_CODE (type
) == METHOD_TYPE
)
9441 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9442 else if (declarator
->kind
== cdk_ptrmem
)
9444 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9446 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9447 /* We will already have complained. */
9448 type
= error_mark_node
;
9450 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9454 type
= build_pointer_type (type
);
9456 /* Process a list of type modifier keywords (such as
9457 const or volatile) that were given inside the `*' or `&'. */
9459 if (declarator
->u
.pointer
.qualifiers
)
9462 = cp_build_qualified_type (type
,
9463 declarator
->u
.pointer
.qualifiers
);
9464 type_quals
= cp_type_quals (type
);
9477 /* We need to stabilize side-effects in VLA sizes for regular array
9478 declarations too, not just pointers to arrays. */
9479 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9480 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9481 && at_function_scope_p ()
9482 && variably_modified_type_p (type
, NULL_TREE
))
9483 stabilize_vla_size (TYPE_SIZE (type
));
9485 /* A `constexpr' specifier used in an object declaration declares
9486 the object as `const'. */
9487 if (constexpr_p
&& innermost_code
!= cdk_function
)
9489 if (type_quals
& TYPE_QUAL_CONST
)
9490 error ("both %<const%> and %<constexpr%> cannot be used here");
9491 if (type_quals
& TYPE_QUAL_VOLATILE
)
9492 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9493 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9495 type_quals
|= TYPE_QUAL_CONST
;
9496 type
= cp_build_qualified_type (type
, type_quals
);
9500 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9501 && TREE_CODE (type
) != FUNCTION_TYPE
9502 && TREE_CODE (type
) != METHOD_TYPE
)
9504 error ("template-id %qD used as a declarator",
9506 unqualified_id
= dname
;
9509 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9510 qualified with a class-name, turn it into a METHOD_TYPE, unless
9511 we know that the function is static. We take advantage of this
9512 opportunity to do other processing that pertains to entities
9513 explicitly declared to be class members. Note that if DECLARATOR
9514 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9515 would not have exited the loop above. */
9517 && declarator
->u
.id
.qualifying_scope
9518 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9522 ctype
= declarator
->u
.id
.qualifying_scope
;
9523 ctype
= TYPE_MAIN_VARIANT (ctype
);
9525 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
9527 /* You're supposed to have one `template <...>' for every
9528 template class, but you don't need one for a full
9529 specialization. For example:
9531 template <class T> struct S{};
9532 template <> struct S<int> { void f(); };
9533 void S<int>::f () {}
9535 is correct; there shouldn't be a `template <>' for the
9536 definition of `S<int>::f'. */
9537 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
9538 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
9539 /* T is an explicit (not partial) specialization. All
9540 containing classes must therefore also be explicitly
9543 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
9544 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
9545 template_count
+= 1;
9547 t
= TYPE_MAIN_DECL (t
);
9548 t
= DECL_CONTEXT (t
);
9551 if (ctype
== current_class_type
)
9555 permerror (input_location
, "member functions are implicitly friends of their class");
9559 permerror (declarator
->id_loc
,
9560 "extra qualification %<%T::%> on member %qs",
9563 else if (/* If the qualifying type is already complete, then we
9564 can skip the following checks. */
9565 !COMPLETE_TYPE_P (ctype
)
9566 && (/* If the function is being defined, then
9567 qualifying type must certainly be complete. */
9569 /* A friend declaration of "T::f" is OK, even if
9570 "T" is a template parameter. But, if this
9571 function is not a friend, the qualifying type
9573 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9574 /* For a declaration, the type need not be
9575 complete, if either it is dependent (since there
9576 is no meaningful definition of complete in that
9577 case) or the qualifying class is currently being
9579 || !(dependent_type_p (ctype
)
9580 || currently_open_class (ctype
)))
9581 /* Check that the qualifying type is complete. */
9582 && !complete_type_or_else (ctype
, NULL_TREE
))
9583 return error_mark_node
;
9584 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9586 if (current_class_type
9587 && (!friendp
|| funcdef_flag
))
9590 ? G_("cannot define member function %<%T::%s%> "
9592 : G_("cannot declare member function %<%T::%s%> "
9594 ctype
, name
, current_class_type
);
9595 return error_mark_node
;
9598 else if (declspecs
->specs
[(int)ds_typedef
]
9599 && current_class_type
)
9601 error ("cannot declare member %<%T::%s%> within %qT",
9602 ctype
, name
, current_class_type
);
9603 return error_mark_node
;
9607 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9608 ctype
= current_class_type
;
9610 /* Now TYPE has the actual type. */
9615 *attrlist
= chainon (returned_attrs
, *attrlist
);
9617 attrlist
= &returned_attrs
;
9620 /* Handle parameter packs. */
9621 if (parameter_pack_p
)
9623 if (decl_context
== PARM
)
9624 /* Turn the type into a pack expansion.*/
9625 type
= make_pack_expansion (type
);
9627 error ("non-parameter %qs cannot be a parameter pack", name
);
9630 /* Did array size calculations overflow? */
9632 if (TREE_CODE (type
) == ARRAY_TYPE
9633 && COMPLETE_TYPE_P (type
)
9634 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9635 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
9637 error ("size of array %qs is too large", name
);
9638 /* If we proceed with the array type as it is, we'll eventually
9639 crash in tree_low_cst(). */
9640 type
= error_mark_node
;
9643 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9644 && !processing_template_decl
9645 && variably_modified_type_p (type
, NULL_TREE
))
9647 if (decl_context
== FIELD
)
9648 error ("data member may not have variably modified type %qT", type
);
9650 error ("parameter may not have variably modified type %qT", type
);
9651 type
= error_mark_node
;
9654 if (explicitp
== 1 || (explicitp
&& friendp
))
9656 /* [dcl.fct.spec] The explicit specifier shall only be used in
9657 declarations of constructors within a class definition. */
9658 error ("only declarations of constructors can be %<explicit%>");
9662 if (storage_class
== sc_mutable
)
9664 if (decl_context
!= FIELD
|| friendp
)
9666 error ("non-member %qs cannot be declared %<mutable%>", name
);
9667 storage_class
= sc_none
;
9669 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9671 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9672 storage_class
= sc_none
;
9674 else if (TREE_CODE (type
) == FUNCTION_TYPE
9675 || TREE_CODE (type
) == METHOD_TYPE
)
9677 error ("function %qs cannot be declared %<mutable%>", name
);
9678 storage_class
= sc_none
;
9682 error ("static %qs cannot be declared %<mutable%>", name
);
9683 storage_class
= sc_none
;
9685 else if (type_quals
& TYPE_QUAL_CONST
)
9687 error ("const %qs cannot be declared %<mutable%>", name
);
9688 storage_class
= sc_none
;
9690 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9692 permerror (input_location
, "reference %qs cannot be declared "
9693 "%<mutable%>", name
);
9694 storage_class
= sc_none
;
9698 /* If this is declaring a typedef name, return a TYPE_DECL. */
9699 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9703 /* Note that the grammar rejects storage classes
9704 in typenames, fields or parameters. */
9705 if (current_lang_name
== lang_name_java
)
9706 TYPE_FOR_JAVA (type
) = 1;
9708 /* This declaration:
9710 typedef void f(int) const;
9712 declares a function type which is not a member of any
9713 particular class, but which is cv-qualified; for
9714 example "f S::*" declares a pointer to a const-qualified
9715 member function of S. We record the cv-qualification in the
9717 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9719 type
= apply_memfn_quals (type
, memfn_quals
);
9721 /* We have now dealt with these qualifiers. */
9722 memfn_quals
= TYPE_UNQUALIFIED
;
9725 if (type_uses_auto (type
))
9727 error ("typedef declared %<auto%>");
9728 type
= error_mark_node
;
9731 if (decl_context
== FIELD
)
9732 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9734 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9735 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9736 error_at (DECL_SOURCE_LOCATION (decl
),
9737 "typedef name may not be a nested-name-specifier");
9738 TREE_TYPE (decl
) = error_mark_node
;
9741 if (decl_context
!= FIELD
)
9743 if (!current_function_decl
)
9744 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9745 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9746 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9747 (current_function_decl
)))
9748 /* The TYPE_DECL is "abstract" because there will be
9749 clones of this constructor/destructor, and there will
9750 be copies of this TYPE_DECL generated in those
9752 DECL_ABSTRACT (decl
) = 1;
9754 else if (constructor_name_p (unqualified_id
, current_class_type
))
9755 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9756 "as enclosing class",
9759 /* If the user declares "typedef struct {...} foo" then the
9760 struct will have an anonymous name. Fill that name in now.
9761 Nothing can refer to it, so nothing needs know about the name
9763 if (type
!= error_mark_node
9766 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9767 && TYPE_ANONYMOUS_P (type
)
9768 && declspecs
->type_definition_p
9769 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9773 /* Replace the anonymous name with the real name everywhere. */
9774 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9776 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9777 /* We do not rename the debug info representing the
9778 anonymous tagged type because the standard says in
9779 [dcl.typedef] that the naming applies only for
9780 linkage purposes. */
9781 /*debug_hooks->set_name (t, decl);*/
9782 TYPE_NAME (t
) = decl
;
9785 if (TYPE_LANG_SPECIFIC (type
))
9786 TYPE_WAS_ANONYMOUS (type
) = 1;
9788 /* If this is a typedef within a template class, the nested
9789 type is a (non-primary) template. The name for the
9790 template needs updating as well. */
9791 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9792 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9793 = TYPE_IDENTIFIER (type
);
9795 /* Adjust linkage now that we aren't anonymous anymore. */
9796 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9797 determine_visibility (TYPE_MAIN_DECL (type
));
9799 /* FIXME remangle member functions; member functions of a
9800 type with external linkage have external linkage. */
9804 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9805 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9807 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
9808 memfn_quals
!= TYPE_UNQUALIFIED
,
9809 inlinep
, friendp
, raises
!= NULL_TREE
);
9811 if (declspecs
->specs
[(int)ds_alias
])
9812 /* Acknowledge that this was written:
9813 `using analias = atype;'. */
9814 TYPE_DECL_ALIAS_P (decl
) = 1;
9819 /* Detect the case of an array type of unspecified size
9820 which came, as such, direct from a typedef name.
9821 We must copy the type, so that the array's domain can be
9822 individually set by the object's initializer. */
9824 if (type
&& typedef_type
9825 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9826 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9827 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9829 /* Detect where we're using a typedef of function type to declare a
9830 function. PARMS will not be set, so we must create it now. */
9832 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9834 tree decls
= NULL_TREE
;
9837 for (args
= TYPE_ARG_TYPES (type
);
9838 args
&& args
!= void_list_node
;
9839 args
= TREE_CHAIN (args
))
9841 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9843 DECL_CHAIN (decl
) = decls
;
9847 parms
= nreverse (decls
);
9849 if (decl_context
!= TYPENAME
)
9851 /* A cv-qualifier-seq shall only be part of the function type
9852 for a non-static member function. [8.3.5/4 dcl.fct] */
9853 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9854 && (current_class_type
== NULL_TREE
|| staticp
) )
9857 ? G_("qualified function types cannot be used to "
9858 "declare static member functions")
9859 : G_("qualified function types cannot be used to "
9860 "declare free functions"));
9861 type
= TYPE_MAIN_VARIANT (type
);
9864 /* The qualifiers on the function type become the qualifiers on
9865 the non-static member function. */
9866 memfn_quals
|= type_memfn_quals (type
);
9867 type_quals
= TYPE_UNQUALIFIED
;
9871 /* If this is a type name (such as, in a cast or sizeof),
9872 compute the type and return it now. */
9874 if (decl_context
== TYPENAME
)
9876 /* Note that the grammar rejects storage classes
9877 in typenames, fields or parameters. */
9878 if (type_quals
!= TYPE_UNQUALIFIED
)
9879 type_quals
= TYPE_UNQUALIFIED
;
9881 /* Special case: "friend class foo" looks like a TYPENAME context. */
9884 if (type_quals
!= TYPE_UNQUALIFIED
)
9886 error ("type qualifiers specified for friend class declaration");
9887 type_quals
= TYPE_UNQUALIFIED
;
9891 error ("%<inline%> specified for friend class declaration");
9897 /* Don't allow friend declaration without a class-key. */
9898 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9899 permerror (input_location
, "template parameters cannot be friends");
9900 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9901 permerror (input_location
, "friend declaration requires class-key, "
9902 "i.e. %<friend class %T::%D%>",
9903 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9905 permerror (input_location
, "friend declaration requires class-key, "
9906 "i.e. %<friend %#T%>",
9910 /* Only try to do this stuff if we didn't already give up. */
9911 if (type
!= integer_type_node
)
9913 /* A friendly class? */
9914 if (current_class_type
)
9915 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9918 error ("trying to make class %qT a friend of global scope",
9921 type
= void_type_node
;
9924 else if (memfn_quals
)
9926 if (ctype
== NULL_TREE
9927 && TREE_CODE (type
) == METHOD_TYPE
)
9928 ctype
= TYPE_METHOD_BASETYPE (type
);
9931 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9932 /* Core issue #547: need to allow this in template type args. */
9933 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9934 type
= apply_memfn_quals (type
, memfn_quals
);
9936 error ("invalid qualifiers on non-member function type");
9941 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9942 && decl_context
!= CATCHPARM
9943 && TREE_CODE (type
) != UNION_TYPE
9946 error ("abstract declarator %qT used as declaration", type
);
9947 return error_mark_node
;
9950 /* Only functions may be declared using an operator-function-id. */
9952 && IDENTIFIER_OPNAME_P (unqualified_id
)
9953 && TREE_CODE (type
) != FUNCTION_TYPE
9954 && TREE_CODE (type
) != METHOD_TYPE
)
9956 error ("declaration of %qD as non-function", unqualified_id
);
9957 return error_mark_node
;
9960 /* We don't check parameter types here because we can emit a better
9961 error message later. */
9962 if (decl_context
!= PARM
)
9964 type
= check_var_type (unqualified_id
, type
);
9965 if (type
== error_mark_node
)
9966 return error_mark_node
;
9969 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9970 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9972 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9974 if (ctype
|| in_namespace
)
9975 error ("cannot use %<::%> in parameter declaration");
9977 if (type_uses_auto (type
))
9979 error ("parameter declared %<auto%>");
9980 type
= error_mark_node
;
9983 /* A parameter declared as an array of T is really a pointer to T.
9984 One declared as a function is really a pointer to a function.
9985 One declared as a member is really a pointer to member. */
9987 if (TREE_CODE (type
) == ARRAY_TYPE
)
9989 /* Transfer const-ness of array into that of type pointed to. */
9990 type
= build_pointer_type (TREE_TYPE (type
));
9991 type_quals
= TYPE_UNQUALIFIED
;
9993 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9994 type
= build_pointer_type (type
);
9997 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
9998 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10000 cp_cv_quals real_quals
= memfn_quals
;
10001 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10002 real_quals
|= TYPE_QUAL_CONST
;
10003 type
= build_memfn_type (type
, ctype
, real_quals
);
10009 if (decl_context
== PARM
)
10011 decl
= cp_build_parm_decl (unqualified_id
, type
);
10013 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10014 memfn_quals
!= TYPE_UNQUALIFIED
,
10015 inlinep
, friendp
, raises
!= NULL_TREE
);
10017 else if (decl_context
== FIELD
)
10019 if (!staticp
&& type_uses_auto (type
))
10021 error ("non-static data member declared %<auto%>");
10022 type
= error_mark_node
;
10025 /* The C99 flexible array extension. */
10026 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10027 && TYPE_DOMAIN (type
) == NULL_TREE
)
10029 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10030 tf_warning_or_error
);
10031 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10034 if (type
== error_mark_node
)
10036 /* Happens when declaring arrays of sizes which
10037 are error_mark_node, for example. */
10040 else if (in_namespace
&& !friendp
)
10042 /* Something like struct S { int N::j; }; */
10043 error ("invalid use of %<::%>");
10044 return error_mark_node
;
10046 else if (TREE_CODE (type
) == FUNCTION_TYPE
10047 || TREE_CODE (type
) == METHOD_TYPE
)
10050 tree function_context
;
10054 /* This should never happen in pure C++ (the check
10055 could be an assert). It could happen in
10056 Objective-C++ if someone writes invalid code that
10057 uses a function declaration for an instance
10058 variable or property (instance variables and
10059 properties are parsed as FIELD_DECLs, but they are
10060 part of an Objective-C class, not a C++ class).
10061 That code is invalid and is caught by this
10065 error ("declaration of function %qD in invalid context",
10067 return error_mark_node
;
10070 /* ``A union may [ ... ] not [ have ] virtual functions.''
10072 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10074 error ("function %qD declared virtual inside a union",
10076 return error_mark_node
;
10079 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10083 error ("%qD cannot be declared virtual, since it "
10084 "is always static",
10091 /* Check that the name used for a destructor makes sense. */
10092 if (sfk
== sfk_destructor
)
10094 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10098 gcc_assert (friendp
);
10099 error ("expected qualified name in friend declaration "
10100 "for destructor %qD", uqname
);
10101 return error_mark_node
;
10104 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10106 error ("declaration of %qD as member of %qT",
10108 return error_mark_node
;
10112 error ("a destructor cannot be %<constexpr%>");
10113 return error_mark_node
;
10116 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10118 error ("expected qualified name in friend declaration "
10119 "for constructor %qD",
10120 id_declarator
->u
.id
.unqualified_name
);
10121 return error_mark_node
;
10124 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10125 function_context
= (ctype
!= NULL_TREE
) ?
10126 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10127 publicp
= (! friendp
|| ! staticp
)
10128 && function_context
== NULL_TREE
;
10129 decl
= grokfndecl (ctype
, type
,
10130 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10131 ? unqualified_id
: dname
,
10134 virtualp
, flags
, memfn_quals
, raises
,
10135 friendp
? -1 : 0, friendp
, publicp
,
10136 inlinep
| (2 * constexpr_p
),
10138 funcdef_flag
, template_count
, in_namespace
,
10139 attrlist
, declarator
->id_loc
);
10140 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10141 if (decl
== NULL_TREE
)
10142 return error_mark_node
;
10144 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10145 /* The decl and setting of decl_attr is also turned off. */
10146 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10149 /* [class.conv.ctor]
10151 A constructor declared without the function-specifier
10152 explicit that can be called with a single parameter
10153 specifies a conversion from the type of its first
10154 parameter to the type of its class. Such a constructor
10155 is called a converting constructor. */
10156 if (explicitp
== 2)
10157 DECL_NONCONVERTING_P (decl
) = 1;
10159 else if (!staticp
&& !dependent_type_p (type
)
10160 && !COMPLETE_TYPE_P (complete_type (type
))
10161 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10163 if (unqualified_id
)
10164 error ("field %qD has incomplete type", unqualified_id
);
10166 error ("name %qT has incomplete type", type
);
10168 /* If we're instantiating a template, tell them which
10169 instantiation made the field's type be incomplete. */
10170 if (current_class_type
10171 && TYPE_NAME (current_class_type
)
10172 && IDENTIFIER_TEMPLATE (current_class_name
)
10174 && declspecs
->type
== type
)
10175 error (" in instantiation of template %qT",
10176 current_class_type
);
10178 return error_mark_node
;
10184 error ("%qE is neither function nor member function; "
10185 "cannot be declared friend", unqualified_id
);
10193 /* Friends are treated specially. */
10194 if (ctype
== current_class_type
)
10195 ; /* We already issued a permerror. */
10196 else if (decl
&& DECL_NAME (decl
))
10198 if (template_class_depth (current_class_type
) == 0)
10200 decl
= check_explicit_specialization
10201 (unqualified_id
, decl
, template_count
,
10202 2 * funcdef_flag
+ 4);
10203 if (decl
== error_mark_node
)
10204 return error_mark_node
;
10207 decl
= do_friend (ctype
, unqualified_id
, decl
,
10213 return error_mark_node
;
10216 /* Structure field. It may not be a function, except for C++. */
10218 if (decl
== NULL_TREE
)
10222 /* C++ allows static class members. All other work
10223 for this is done by grokfield. */
10224 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
10225 set_linkage_for_static_data_member (decl
);
10226 /* Even if there is an in-class initialization, DECL
10227 is considered undefined until an out-of-class
10228 definition is provided. */
10229 DECL_EXTERNAL (decl
) = 1;
10232 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10234 if (constexpr_p
&& !initialized
)
10236 error ("constexpr static data member %qD must have an "
10237 "initializer", decl
);
10238 constexpr_p
= false;
10245 error ("non-static data member %qE declared %<constexpr%>",
10247 constexpr_p
= false;
10249 decl
= build_decl (input_location
,
10250 FIELD_DECL
, unqualified_id
, type
);
10251 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10252 if (bitfield
&& !unqualified_id
)
10253 TREE_NO_WARNING (decl
) = 1;
10255 if (storage_class
== sc_mutable
)
10257 DECL_MUTABLE_P (decl
) = 1;
10258 storage_class
= sc_none
;
10263 /* An attempt is being made to initialize a non-static
10264 member. This is new in C++11. */
10265 maybe_warn_cpp0x (CPP0X_NSDMI
);
10267 /* If this has been parsed with static storage class, but
10268 errors forced staticp to be cleared, ensure NSDMI is
10270 if (declspecs
->storage_class
== sc_static
)
10271 DECL_INITIAL (decl
) = error_mark_node
;
10275 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10276 memfn_quals
!= TYPE_UNQUALIFIED
,
10277 inlinep
, friendp
, raises
!= NULL_TREE
);
10280 else if (TREE_CODE (type
) == FUNCTION_TYPE
10281 || TREE_CODE (type
) == METHOD_TYPE
)
10283 tree original_name
;
10286 if (!unqualified_id
)
10287 return error_mark_node
;
10289 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10290 original_name
= dname
;
10292 original_name
= unqualified_id
;
10294 if (storage_class
== sc_auto
)
10295 error ("storage class %<auto%> invalid for function %qs", name
);
10296 else if (storage_class
== sc_register
)
10297 error ("storage class %<register%> invalid for function %qs", name
);
10299 error ("storage class %<__thread%> invalid for function %qs", name
);
10301 if (virt_specifiers
)
10302 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10303 /* Function declaration not at top level.
10304 Storage classes other than `extern' are not allowed
10305 and `extern' makes no difference. */
10306 if (! toplevel_bindings_p ()
10307 && (storage_class
== sc_static
10308 || declspecs
->specs
[(int)ds_inline
])
10311 if (storage_class
== sc_static
)
10312 pedwarn (input_location
, OPT_pedantic
,
10313 "%<static%> specified invalid for function %qs "
10314 "declared out of global scope", name
);
10316 pedwarn (input_location
, OPT_pedantic
,
10317 "%<inline%> specifier invalid for function %qs "
10318 "declared out of global scope", name
);
10321 if (ctype
== NULL_TREE
)
10325 error ("virtual non-class function %qs", name
);
10328 else if (sfk
== sfk_constructor
10329 || sfk
== sfk_destructor
)
10331 error (funcdef_flag
10332 ? G_("%qs defined in a non-class scope")
10333 : G_("%qs declared in a non-class scope"), name
);
10338 /* Record presence of `static'. */
10339 publicp
= (ctype
!= NULL_TREE
10340 || storage_class
== sc_extern
10341 || storage_class
!= sc_static
);
10343 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10344 virtualp
, flags
, memfn_quals
, raises
,
10346 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10348 template_count
, in_namespace
, attrlist
,
10349 declarator
->id_loc
);
10350 if (decl
== NULL_TREE
)
10351 return error_mark_node
;
10355 int invalid_static
= 0;
10357 /* Don't allow a static member function in a class, and forbid
10358 declaring main to be static. */
10359 if (TREE_CODE (type
) == METHOD_TYPE
)
10361 permerror (input_location
, "cannot declare member function %qD to have "
10362 "static linkage", decl
);
10363 invalid_static
= 1;
10365 else if (current_function_decl
)
10367 /* FIXME need arm citation */
10368 error ("cannot declare static function inside another function");
10369 invalid_static
= 1;
10372 if (invalid_static
)
10375 storage_class
= sc_none
;
10381 /* It's a variable. */
10383 /* An uninitialized decl with `extern' is a reference. */
10384 decl
= grokvardecl (type
, unqualified_id
,
10387 (type_quals
& TYPE_QUAL_CONST
) != 0,
10388 ctype
? ctype
: in_namespace
);
10389 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10390 memfn_quals
!= TYPE_UNQUALIFIED
,
10391 inlinep
, friendp
, raises
!= NULL_TREE
);
10395 DECL_CONTEXT (decl
) = ctype
;
10398 permerror (input_location
, "%<static%> may not be used when defining "
10399 "(as opposed to declaring) a static data member");
10401 storage_class
= sc_none
;
10403 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10405 error ("static member %qD declared %<register%>", decl
);
10406 storage_class
= sc_none
;
10408 if (storage_class
== sc_extern
&& pedantic
)
10410 pedwarn (input_location
, OPT_pedantic
,
10411 "cannot explicitly declare member %q#D to have "
10412 "extern linkage", decl
);
10413 storage_class
= sc_none
;
10416 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10418 error ("declaration of constexpr variable %qD is not a definition",
10420 constexpr_p
= false;
10424 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10426 if (toplevel_bindings_p ())
10428 /* It's common practice (and completely valid) to have a const
10429 be initialized and declared extern. */
10430 if (!(type_quals
& TYPE_QUAL_CONST
))
10431 warning (0, "%qs initialized and declared %<extern%>", name
);
10435 error ("%qs has both %<extern%> and initializer", name
);
10436 return error_mark_node
;
10440 /* Record `register' declaration for warnings on &
10441 and in case doing stupid register allocation. */
10443 if (storage_class
== sc_register
)
10444 DECL_REGISTER (decl
) = 1;
10445 else if (storage_class
== sc_extern
)
10446 DECL_THIS_EXTERN (decl
) = 1;
10447 else if (storage_class
== sc_static
)
10448 DECL_THIS_STATIC (decl
) = 1;
10450 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10451 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10452 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10454 /* Record constancy and volatility on the DECL itself . There's
10455 no need to do this when processing a template; we'll do this
10456 for the instantiated declaration based on the type of DECL. */
10457 if (!processing_template_decl
)
10458 cp_apply_type_quals_to_decl (type_quals
, decl
);
10464 /* Subroutine of start_function. Ensure that each of the parameter
10465 types (as listed in PARMS) is complete, as is required for a
10466 function definition. */
10469 require_complete_types_for_parms (tree parms
)
10471 for (; parms
; parms
= DECL_CHAIN (parms
))
10473 if (dependent_type_p (TREE_TYPE (parms
)))
10475 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10476 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10478 relayout_decl (parms
);
10479 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10482 /* grokparms or complete_type_or_else will have already issued
10484 TREE_TYPE (parms
) = error_mark_node
;
10488 /* Returns nonzero if T is a local variable. */
10491 local_variable_p (const_tree t
)
10493 if ((TREE_CODE (t
) == VAR_DECL
10494 /* A VAR_DECL with a context that is a _TYPE is a static data
10496 && !TYPE_P (CP_DECL_CONTEXT (t
))
10497 /* Any other non-local variable must be at namespace scope. */
10498 && !DECL_NAMESPACE_SCOPE_P (t
))
10499 || (TREE_CODE (t
) == PARM_DECL
))
10505 /* Like local_variable_p, but suitable for use as a tree-walking
10509 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10510 void *data ATTRIBUTE_UNUSED
)
10512 /* Check DECL_NAME to avoid including temporaries. We don't check
10513 DECL_ARTIFICIAL because we do want to complain about 'this'. */
10514 if (local_variable_p (*tp
) && DECL_NAME (*tp
))
10516 else if (TYPE_P (*tp
))
10517 *walk_subtrees
= 0;
10522 /* Check that ARG, which is a default-argument expression for a
10523 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10524 something goes wrong. DECL may also be a _TYPE node, rather than a
10525 DECL, if there is no DECL available. */
10528 check_default_argument (tree decl
, tree arg
)
10533 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10534 /* We get a DEFAULT_ARG when looking at an in-class declaration
10535 with a default argument. Ignore the argument for now; we'll
10536 deal with it after the class is complete. */
10545 decl_type
= TREE_TYPE (decl
);
10547 if (arg
== error_mark_node
10548 || decl
== error_mark_node
10549 || TREE_TYPE (arg
) == error_mark_node
10550 || decl_type
== error_mark_node
)
10551 /* Something already went wrong. There's no need to check
10553 return error_mark_node
;
10555 /* [dcl.fct.default]
10557 A default argument expression is implicitly converted to the
10559 if (!TREE_TYPE (arg
)
10560 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
10563 error ("default argument for %q#D has type %qT",
10564 decl
, TREE_TYPE (arg
));
10566 error ("default argument for parameter of type %qT has type %qT",
10567 decl_type
, TREE_TYPE (arg
));
10569 return error_mark_node
;
10572 /* [dcl.fct.default]
10574 Local variables shall not be used in default argument
10577 The keyword `this' shall not be used in a default argument of a
10578 member function. */
10579 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10582 if (DECL_NAME (var
) == this_identifier
)
10583 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10585 error ("default argument %qE uses local variable %qD", arg
, var
);
10586 return error_mark_node
;
10593 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10596 type_is_deprecated (tree type
)
10598 enum tree_code code
;
10599 if (TREE_DEPRECATED (type
))
10601 if (TYPE_NAME (type
)
10602 && TREE_DEPRECATED (TYPE_NAME (type
)))
10605 /* Do warn about using typedefs to a deprecated class. */
10606 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10607 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10609 code
= TREE_CODE (type
);
10611 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10612 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10613 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10614 return type_is_deprecated (TREE_TYPE (type
));
10616 if (TYPE_PTRMEMFUNC_P (type
))
10617 return type_is_deprecated
10618 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10623 /* Decode the list of parameter types for a function type.
10624 Given the list of things declared inside the parens,
10625 return a list of types.
10627 If this parameter does not end with an ellipsis, we append
10630 *PARMS is set to the chain of PARM_DECLs created. */
10633 grokparms (tree parmlist
, tree
*parms
)
10635 tree result
= NULL_TREE
;
10636 tree decls
= NULL_TREE
;
10640 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10642 tree type
= NULL_TREE
;
10643 tree init
= TREE_PURPOSE (parm
);
10644 tree decl
= TREE_VALUE (parm
);
10645 const char *errmsg
;
10647 if (parm
== void_list_node
)
10650 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10653 type
= TREE_TYPE (decl
);
10654 if (VOID_TYPE_P (type
))
10656 if (same_type_p (type
, void_type_node
)
10657 && DECL_SELF_REFERENCE_P (type
)
10658 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10659 /* this is a parmlist of `(void)', which is ok. */
10661 cxx_incomplete_type_error (decl
, type
);
10662 /* It's not a good idea to actually create parameters of
10663 type `void'; other parts of the compiler assume that a
10664 void type terminates the parameter list. */
10665 type
= error_mark_node
;
10666 TREE_TYPE (decl
) = error_mark_node
;
10669 if (type
!= error_mark_node
10670 && TYPE_FOR_JAVA (type
)
10671 && MAYBE_CLASS_TYPE_P (type
))
10673 error ("parameter %qD has Java class type", decl
);
10674 type
= error_mark_node
;
10675 TREE_TYPE (decl
) = error_mark_node
;
10679 if (type
!= error_mark_node
10680 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10683 type
= error_mark_node
;
10684 TREE_TYPE (decl
) = error_mark_node
;
10687 if (type
!= error_mark_node
)
10689 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10691 tree deptype
= type_is_deprecated (type
);
10693 warn_deprecated_use (deptype
, NULL_TREE
);
10696 /* Top-level qualifiers on the parameters are
10697 ignored for function types. */
10698 type
= cp_build_qualified_type (type
, 0);
10699 if (TREE_CODE (type
) == METHOD_TYPE
)
10701 error ("parameter %qD invalidly declared method type", decl
);
10702 type
= build_pointer_type (type
);
10703 TREE_TYPE (decl
) = type
;
10705 else if (abstract_virtuals_error (decl
, type
))
10706 any_error
= 1; /* Seems like a good idea. */
10707 else if (POINTER_TYPE_P (type
))
10709 /* [dcl.fct]/6, parameter types cannot contain pointers
10710 (references) to arrays of unknown bound. */
10711 tree t
= TREE_TYPE (type
);
10712 int ptr
= TYPE_PTR_P (type
);
10716 if (TYPE_PTR_P (t
))
10718 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10720 else if (!TYPE_DOMAIN (t
))
10724 if (TREE_CODE (t
) == ARRAY_TYPE
)
10726 ? G_("parameter %qD includes pointer to array of "
10727 "unknown bound %qT")
10728 : G_("parameter %qD includes reference to array of "
10729 "unknown bound %qT"),
10735 else if (init
&& !processing_template_decl
)
10736 init
= check_default_argument (decl
, init
);
10739 DECL_CHAIN (decl
) = decls
;
10741 result
= tree_cons (init
, type
, result
);
10743 decls
= nreverse (decls
);
10744 result
= nreverse (result
);
10746 result
= chainon (result
, void_list_node
);
10753 /* D is a constructor or overloaded `operator='.
10755 Let T be the class in which D is declared. Then, this function
10758 -1 if D's is an ill-formed constructor or copy assignment operator
10759 whose first parameter is of type `T'.
10760 0 if D is not a copy constructor or copy assignment
10762 1 if D is a copy constructor or copy assignment operator whose
10763 first parameter is a reference to non-const qualified T.
10764 2 if D is a copy constructor or copy assignment operator whose
10765 first parameter is a reference to const qualified T.
10767 This function can be used as a predicate. Positive values indicate
10768 a copy constructor and nonzero values indicate a copy assignment
10772 copy_fn_p (const_tree d
)
10778 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10780 if (TREE_CODE (d
) == TEMPLATE_DECL
10781 || (DECL_TEMPLATE_INFO (d
)
10782 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10783 /* Instantiations of template member functions are never copy
10784 functions. Note that member functions of templated classes are
10785 represented as template functions internally, and we must
10786 accept those as copy functions. */
10789 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10793 arg_type
= TREE_VALUE (args
);
10794 if (arg_type
== error_mark_node
)
10797 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10799 /* Pass by value copy assignment operator. */
10802 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10803 && !TYPE_REF_IS_RVALUE (arg_type
)
10804 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10806 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10812 args
= TREE_CHAIN (args
);
10814 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10815 /* There are more non-optional args. */
10821 /* D is a constructor or overloaded `operator='.
10823 Let T be the class in which D is declared. Then, this function
10824 returns true when D is a move constructor or move assignment
10825 operator, false otherwise. */
10828 move_fn_p (const_tree d
)
10832 bool result
= false;
10834 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10836 if (cxx_dialect
== cxx98
)
10837 /* There are no move constructors if we are in C++98 mode. */
10840 if (TREE_CODE (d
) == TEMPLATE_DECL
10841 || (DECL_TEMPLATE_INFO (d
)
10842 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10843 /* Instantiations of template member functions are never copy
10844 functions. Note that member functions of templated classes are
10845 represented as template functions internally, and we must
10846 accept those as copy functions. */
10849 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10853 arg_type
= TREE_VALUE (args
);
10854 if (arg_type
== error_mark_node
)
10857 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10858 && TYPE_REF_IS_RVALUE (arg_type
)
10859 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10863 args
= TREE_CHAIN (args
);
10865 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10866 /* There are more non-optional args. */
10872 /* Remember any special properties of member function DECL. */
10875 grok_special_member_properties (tree decl
)
10879 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10882 class_type
= DECL_CONTEXT (decl
);
10883 if (DECL_CONSTRUCTOR_P (decl
))
10885 int ctor
= copy_fn_p (decl
);
10887 if (!DECL_ARTIFICIAL (decl
))
10888 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10894 A non-template constructor for class X is a copy
10895 constructor if its first parameter is of type X&, const
10896 X&, volatile X& or const volatile X&, and either there
10897 are no other parameters or else all other parameters have
10898 default arguments. */
10899 TYPE_HAS_COPY_CTOR (class_type
) = 1;
10900 if (user_provided_p (decl
))
10901 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
10903 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
10905 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10907 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10908 if (user_provided_p (decl
))
10909 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10911 else if (move_fn_p (decl
) && user_provided_p (decl
))
10912 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
10913 else if (is_list_ctor (decl
))
10914 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10916 if (DECL_DECLARED_CONSTEXPR_P (decl
)
10917 && !copy_fn_p (decl
) && !move_fn_p (decl
))
10918 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
10920 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10924 A non-template assignment operator for class X is a copy
10925 assignment operator if its parameter is of type X, X&, const
10926 X&, volatile X& or const volatile X&. */
10928 int assop
= copy_fn_p (decl
);
10932 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
10933 if (user_provided_p (decl
))
10934 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
10936 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
10938 else if (move_fn_p (decl
) && user_provided_p (decl
))
10939 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
10941 /* Destructors are handled in check_methods. */
10944 /* Check a constructor DECL has the correct form. Complains
10945 if the class has a constructor of the form X(X). */
10948 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10950 int ctor_parm
= copy_fn_p (decl
);
10956 A declaration of a constructor for a class X is ill-formed if
10957 its first parameter is of type (optionally cv-qualified) X
10958 and either there are no other parameters or else all other
10959 parameters have default arguments.
10961 We *don't* complain about member template instantiations that
10962 have this form, though; they can occur as we try to decide
10963 what constructor to use during overload resolution. Since
10964 overload resolution will never prefer such a constructor to
10965 the non-template copy constructor (which is either explicitly
10966 or implicitly defined), there's no need to worry about their
10967 existence. Theoretically, they should never even be
10968 instantiated, but that's hard to forestall. */
10969 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10977 /* An operator with this code is unary, but can also be binary. */
10980 ambi_op_p (enum tree_code code
)
10982 return (code
== INDIRECT_REF
10983 || code
== ADDR_EXPR
10984 || code
== UNARY_PLUS_EXPR
10985 || code
== NEGATE_EXPR
10986 || code
== PREINCREMENT_EXPR
10987 || code
== PREDECREMENT_EXPR
);
10990 /* An operator with this name can only be unary. */
10993 unary_op_p (enum tree_code code
)
10995 return (code
== TRUTH_NOT_EXPR
10996 || code
== BIT_NOT_EXPR
10997 || code
== COMPONENT_REF
10998 || code
== TYPE_EXPR
);
11001 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11002 errors are issued for invalid declarations. */
11005 grok_op_properties (tree decl
, bool complain
)
11007 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11009 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11010 tree name
= DECL_NAME (decl
);
11011 enum tree_code operator_code
;
11016 /* Count the number of arguments and check for ellipsis. */
11017 for (argtype
= argtypes
, arity
= 0;
11018 argtype
&& argtype
!= void_list_node
;
11019 argtype
= TREE_CHAIN (argtype
))
11021 ellipsis_p
= !argtype
;
11023 class_type
= DECL_CONTEXT (decl
);
11024 if (class_type
&& !CLASS_TYPE_P (class_type
))
11025 class_type
= NULL_TREE
;
11027 if (DECL_CONV_FN_P (decl
))
11028 operator_code
= TYPE_EXPR
;
11032 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11033 if (ansi_opname (CODE) == name) \
11035 operator_code = (CODE); \
11038 else if (ansi_assopname (CODE) == name) \
11040 operator_code = (CODE); \
11041 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11045 #include "operators.def"
11046 #undef DEF_OPERATOR
11048 gcc_unreachable ();
11051 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11052 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11055 switch (operator_code
)
11058 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11062 TYPE_GETS_DELETE (class_type
) |= 1;
11066 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11069 case VEC_DELETE_EXPR
:
11070 TYPE_GETS_DELETE (class_type
) |= 2;
11077 /* [basic.std.dynamic.allocation]/1:
11079 A program is ill-formed if an allocation function is declared
11080 in a namespace scope other than global scope or declared static
11083 The same also holds true for deallocation functions. */
11084 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11085 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11087 if (DECL_NAMESPACE_SCOPE_P (decl
))
11089 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11091 error ("%qD may not be declared within a namespace", decl
);
11094 else if (!TREE_PUBLIC (decl
))
11096 error ("%qD may not be declared as static", decl
);
11102 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11104 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11105 DECL_IS_OPERATOR_NEW (decl
) = 1;
11107 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11108 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11111 /* An operator function must either be a non-static member function
11112 or have at least one parameter of a class, a reference to a class,
11113 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11114 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11116 if (operator_code
== TYPE_EXPR
11117 || operator_code
== CALL_EXPR
11118 || operator_code
== COMPONENT_REF
11119 || operator_code
== ARRAY_REF
11120 || operator_code
== NOP_EXPR
)
11122 error ("%qD must be a nonstatic member function", decl
);
11129 if (DECL_STATIC_FUNCTION_P (decl
))
11131 error ("%qD must be either a non-static member "
11132 "function or a non-member function", decl
);
11136 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11138 tree arg
= non_reference (TREE_VALUE (p
));
11139 if (arg
== error_mark_node
)
11142 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11143 because these checks are performed even on
11144 template functions. */
11145 if (MAYBE_CLASS_TYPE_P (arg
)
11146 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11150 if (!p
|| p
== void_list_node
)
11153 error ("%qD must have an argument of class or "
11154 "enumerated type", decl
);
11160 /* There are no restrictions on the arguments to an overloaded
11162 if (operator_code
== CALL_EXPR
)
11165 /* Warn about conversion operators that will never be used. */
11166 if (IDENTIFIER_TYPENAME_P (name
)
11167 && ! DECL_TEMPLATE_INFO (decl
)
11169 /* Warn only declaring the function; there is no need to
11170 warn again about out-of-class definitions. */
11171 && class_type
== current_class_type
)
11173 tree t
= TREE_TYPE (name
);
11174 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11177 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11179 if (TREE_CODE (t
) == VOID_TYPE
)
11180 warning (OPT_Wconversion
,
11182 ? G_("conversion to a reference to void "
11183 "will never use a type conversion operator")
11184 : G_("conversion to void "
11185 "will never use a type conversion operator"));
11186 else if (class_type
)
11188 if (t
== class_type
)
11189 warning (OPT_Wconversion
,
11191 ? G_("conversion to a reference to the same type "
11192 "will never use a type conversion operator")
11193 : G_("conversion to the same type "
11194 "will never use a type conversion operator"));
11195 /* Don't force t to be complete here. */
11196 else if (MAYBE_CLASS_TYPE_P (t
)
11197 && COMPLETE_TYPE_P (t
)
11198 && DERIVED_FROM_P (t
, class_type
))
11199 warning (OPT_Wconversion
,
11201 ? G_("conversion to a reference to a base class "
11202 "will never use a type conversion operator")
11203 : G_("conversion to a base class "
11204 "will never use a type conversion operator"));
11209 if (operator_code
== COND_EXPR
)
11212 error ("ISO C++ prohibits overloading operator ?:");
11215 else if (ellipsis_p
)
11217 error ("%qD must not have variable number of arguments", decl
);
11220 else if (ambi_op_p (operator_code
))
11223 /* We pick the one-argument operator codes by default, so
11224 we don't have to change anything. */
11226 else if (arity
== 2)
11228 /* If we thought this was a unary operator, we now know
11229 it to be a binary operator. */
11230 switch (operator_code
)
11233 operator_code
= MULT_EXPR
;
11237 operator_code
= BIT_AND_EXPR
;
11240 case UNARY_PLUS_EXPR
:
11241 operator_code
= PLUS_EXPR
;
11245 operator_code
= MINUS_EXPR
;
11248 case PREINCREMENT_EXPR
:
11249 operator_code
= POSTINCREMENT_EXPR
;
11252 case PREDECREMENT_EXPR
:
11253 operator_code
= POSTDECREMENT_EXPR
;
11257 gcc_unreachable ();
11260 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11262 if ((operator_code
== POSTINCREMENT_EXPR
11263 || operator_code
== POSTDECREMENT_EXPR
)
11264 && ! processing_template_decl
11265 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11268 error ("postfix %qD must take %<int%> as its argument",
11271 error ("postfix %qD must take %<int%> as its second "
11279 error ("%qD must take either zero or one argument", decl
);
11281 error ("%qD must take either one or two arguments", decl
);
11285 /* More Effective C++ rule 6. */
11287 && (operator_code
== POSTINCREMENT_EXPR
11288 || operator_code
== POSTDECREMENT_EXPR
11289 || operator_code
== PREINCREMENT_EXPR
11290 || operator_code
== PREDECREMENT_EXPR
))
11292 tree arg
= TREE_VALUE (argtypes
);
11293 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11294 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11295 arg
= TREE_TYPE (arg
);
11296 arg
= TYPE_MAIN_VARIANT (arg
);
11297 if (operator_code
== PREINCREMENT_EXPR
11298 || operator_code
== PREDECREMENT_EXPR
)
11300 if (TREE_CODE (ret
) != REFERENCE_TYPE
11301 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11303 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11304 build_reference_type (arg
));
11308 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11309 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11313 else if (unary_op_p (operator_code
))
11318 error ("%qD must take %<void%>", decl
);
11320 error ("%qD must take exactly one argument", decl
);
11324 else /* if (binary_op_p (operator_code)) */
11329 error ("%qD must take exactly one argument", decl
);
11331 error ("%qD must take exactly two arguments", decl
);
11335 /* More Effective C++ rule 7. */
11337 && (operator_code
== TRUTH_ANDIF_EXPR
11338 || operator_code
== TRUTH_ORIF_EXPR
11339 || operator_code
== COMPOUND_EXPR
))
11340 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11344 /* Effective C++ rule 23. */
11347 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11348 && (operator_code
== PLUS_EXPR
11349 || operator_code
== MINUS_EXPR
11350 || operator_code
== TRUNC_DIV_EXPR
11351 || operator_code
== MULT_EXPR
11352 || operator_code
== TRUNC_MOD_EXPR
)
11353 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11354 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11356 /* [over.oper]/8 */
11357 for (; argtypes
&& argtypes
!= void_list_node
;
11358 argtypes
= TREE_CHAIN (argtypes
))
11359 if (TREE_PURPOSE (argtypes
))
11361 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11362 if (operator_code
== POSTINCREMENT_EXPR
11363 || operator_code
== POSTDECREMENT_EXPR
)
11365 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
11370 error ("%qD cannot have default arguments", decl
);
11378 /* Return a string giving the keyword associate with CODE. */
11380 static const char *
11381 tag_name (enum tag_types code
)
11393 case typename_type
:
11396 gcc_unreachable ();
11400 /* Name lookup in an elaborated-type-specifier (after the keyword
11401 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11402 elaborated-type-specifier is invalid, issue a diagnostic and return
11403 error_mark_node; otherwise, return the *_TYPE to which it referred.
11404 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11407 check_elaborated_type_specifier (enum tag_types tag_code
,
11409 bool allow_template_p
)
11413 if (decl
== error_mark_node
)
11414 return error_mark_node
;
11418 struct S { struct S *p; };
11420 name lookup will find the TYPE_DECL for the implicit "S::S"
11421 typedef. Adjust for that here. */
11422 if (DECL_SELF_REFERENCE_P (decl
))
11423 decl
= TYPE_NAME (TREE_TYPE (decl
));
11425 type
= TREE_TYPE (decl
);
11427 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11428 is false for this case as well. */
11429 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11431 error ("using template type parameter %qT after %qs",
11432 type
, tag_name (tag_code
));
11433 return error_mark_node
;
11435 /* Accept bound template template parameters. */
11436 else if (allow_template_p
11437 && TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
)
11441 If the identifier resolves to a typedef-name or the
11442 simple-template-id resolves to an alias template
11443 specialization, the elaborated-type-specifier is ill-formed.
11445 In other words, the only legitimate declaration to use in the
11446 elaborated type specifier is the implicit typedef created when
11447 the type is declared. */
11448 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11449 && !DECL_SELF_REFERENCE_P (decl
)
11450 && tag_code
!= typename_type
)
11452 if (alias_template_specialization_p (type
))
11453 error ("using alias template specialization %qT after %qs",
11454 type
, tag_name (tag_code
));
11456 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11457 inform (DECL_SOURCE_LOCATION (decl
),
11458 "%qD has a previous declaration here", decl
);
11459 return error_mark_node
;
11461 else if (TREE_CODE (type
) != RECORD_TYPE
11462 && TREE_CODE (type
) != UNION_TYPE
11463 && tag_code
!= enum_type
11464 && tag_code
!= typename_type
)
11466 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11467 error ("%q+T has a previous declaration here", type
);
11468 return error_mark_node
;
11470 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11471 && tag_code
== enum_type
)
11473 error ("%qT referred to as enum", type
);
11474 error ("%q+T has a previous declaration here", type
);
11475 return error_mark_node
;
11477 else if (!allow_template_p
11478 && TREE_CODE (type
) == RECORD_TYPE
11479 && CLASSTYPE_IS_TEMPLATE (type
))
11481 /* If a class template appears as elaborated type specifier
11482 without a template header such as:
11484 template <class T> class C {};
11485 void f(class C); // No template header here
11487 then the required template argument is missing. */
11488 error ("template argument required for %<%s %T%>",
11489 tag_name (tag_code
),
11490 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11491 return error_mark_node
;
11497 /* Lookup NAME in elaborate type specifier in scope according to
11498 SCOPE and issue diagnostics if necessary.
11499 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11500 found, and ERROR_MARK_NODE for type error. */
11503 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11504 tag_scope scope
, bool template_header_p
)
11508 if (scope
== ts_global
)
11510 /* First try ordinary name lookup, ignoring hidden class name
11511 injected via friend declaration. */
11512 decl
= lookup_name_prefer_type (name
, 2);
11513 /* If that fails, the name will be placed in the smallest
11514 non-class, non-function-prototype scope according to 3.3.1/5.
11515 We may already have a hidden name declared as friend in this
11516 scope. So lookup again but not ignoring hidden names.
11517 If we find one, that name will be made visible rather than
11518 creating a new tag. */
11520 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11523 decl
= lookup_type_scope (name
, scope
);
11525 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
11526 decl
= DECL_TEMPLATE_RESULT (decl
);
11528 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11530 /* Look for invalid nested type:
11534 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11536 error ("%qD has the same name as the class in which it is "
11539 return error_mark_node
;
11542 /* Two cases we need to consider when deciding if a class
11543 template is allowed as an elaborated type specifier:
11544 1. It is a self reference to its own class.
11545 2. It comes with a template header.
11549 template <class T> class C {
11550 class C *c1; // DECL_SELF_REFERENCE_P is true
11553 template <class U> class C; // template_header_p is true
11554 template <class T> class C<T>::D {
11555 class C *c2; // DECL_SELF_REFERENCE_P is true
11558 t
= check_elaborated_type_specifier (tag_code
,
11561 | DECL_SELF_REFERENCE_P (decl
));
11564 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11566 error ("reference to %qD is ambiguous", name
);
11567 print_candidates (decl
);
11568 return error_mark_node
;
11574 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11575 Define the tag as a forward-reference if it is not defined.
11577 If a declaration is given, process it here, and report an error if
11578 multiple declarations are not identical.
11580 SCOPE is TS_CURRENT when this is also a definition. Only look in
11581 the current frame for the name (since C++ allows new names in any
11582 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11583 declaration. Only look beginning from the current scope outward up
11584 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11586 TEMPLATE_HEADER_P is true when this declaration is preceded by
11587 a set of template parameters. */
11590 xref_tag_1 (enum tag_types tag_code
, tree name
,
11591 tag_scope scope
, bool template_header_p
)
11593 enum tree_code code
;
11595 tree context
= NULL_TREE
;
11597 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11603 code
= RECORD_TYPE
;
11609 code
= ENUMERAL_TYPE
;
11612 gcc_unreachable ();
11615 /* In case of anonymous name, xref_tag is only called to
11616 make type node and push name. Name lookup is not required. */
11617 if (ANON_AGGRNAME_P (name
))
11620 t
= lookup_and_check_tag (tag_code
, name
,
11621 scope
, template_header_p
);
11623 if (t
== error_mark_node
)
11624 return error_mark_node
;
11626 if (scope
!= ts_current
&& t
&& current_class_type
11627 && template_class_depth (current_class_type
)
11628 && template_header_p
)
11630 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11631 definition of this tag. Since, in addition, we are currently
11632 processing a (member) template declaration of a template
11633 class, we must be very careful; consider:
11640 { template <class V>
11641 friend struct S1; };
11643 Here, the S2::S1 declaration should not be confused with the
11644 outer declaration. In particular, the inner version should
11645 have a template parameter of level 2, not level 1. This
11646 would be particularly important if the member declaration
11649 template <class V = U> friend struct S1;
11651 say, when we should tsubst into `U' when instantiating
11652 S2. On the other hand, when presented with:
11662 we must find the inner binding eventually. We
11663 accomplish this by making sure that the new type we
11664 create to represent this declaration has the right
11666 context
= TYPE_CONTEXT (t
);
11672 /* If no such tag is yet defined, create a forward-reference node
11673 and record it as the "definition".
11674 When a real declaration of this type is found,
11675 the forward-reference will be altered into a real type. */
11676 if (code
== ENUMERAL_TYPE
)
11678 error ("use of enum %q#D without previous declaration", name
);
11679 return error_mark_node
;
11683 t
= make_class_type (code
);
11684 TYPE_CONTEXT (t
) = context
;
11685 t
= pushtag (name
, t
, scope
);
11690 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11692 if (!redeclare_class_template (t
, current_template_parms
))
11693 return error_mark_node
;
11695 else if (!processing_template_decl
11696 && CLASS_TYPE_P (t
)
11697 && CLASSTYPE_IS_TEMPLATE (t
))
11699 error ("redeclaration of %qT as a non-template", t
);
11700 error ("previous declaration %q+D", t
);
11701 return error_mark_node
;
11704 /* Make injected friend class visible. */
11705 if (scope
!= ts_within_enclosing_non_class
11706 && hidden_name_p (TYPE_NAME (t
)))
11708 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11709 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11711 if (TYPE_TEMPLATE_INFO (t
))
11713 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11714 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11722 /* Wrapper for xref_tag_1. */
11725 xref_tag (enum tag_types tag_code
, tree name
,
11726 tag_scope scope
, bool template_header_p
)
11730 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
11731 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
11732 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
11738 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11740 enum tag_types tag_kind
;
11742 if (TREE_CODE (old
) == RECORD_TYPE
)
11743 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11745 tag_kind
= union_type
;
11747 if (id
== NULL_TREE
)
11748 id
= TYPE_IDENTIFIER (old
);
11750 return xref_tag (tag_kind
, id
, scope
, false);
11753 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11754 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11755 access_* node, and the TREE_VALUE is the type of the base-class.
11756 Non-NULL TREE_TYPE indicates virtual inheritance.
11758 Returns true if the binfo hierarchy was successfully created,
11759 false if an error was detected. */
11762 xref_basetypes (tree ref
, tree base_list
)
11765 tree binfo
, base_binfo
;
11766 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11767 unsigned max_bases
= 0; /* Maximum direct bases. */
11769 tree default_access
;
11770 tree igo_prev
; /* Track Inheritance Graph Order. */
11772 if (ref
== error_mark_node
)
11775 /* The base of a derived class is private by default, all others are
11777 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11778 && CLASSTYPE_DECLARED_CLASS (ref
)
11779 ? access_private_node
: access_public_node
);
11781 /* First, make sure that any templates in base-classes are
11782 instantiated. This ensures that if we call ourselves recursively
11783 we do not get confused about which classes are marked and which
11785 basep
= &base_list
;
11788 tree basetype
= TREE_VALUE (*basep
);
11790 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11791 && !complete_type_or_else (basetype
, NULL
))
11792 /* An incomplete type. Remove it from the list. */
11793 *basep
= TREE_CHAIN (*basep
);
11797 if (TREE_TYPE (*basep
))
11799 if (CLASS_TYPE_P (basetype
))
11800 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11801 basep
= &TREE_CHAIN (*basep
);
11805 TYPE_MARKED_P (ref
) = 1;
11807 /* The binfo slot should be empty, unless this is an (ill-formed)
11809 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11811 error ("redefinition of %q#T", ref
);
11815 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11817 binfo
= make_tree_binfo (max_bases
);
11819 TYPE_BINFO (ref
) = binfo
;
11820 BINFO_OFFSET (binfo
) = size_zero_node
;
11821 BINFO_TYPE (binfo
) = ref
;
11823 /* Apply base-class info set up to the variants of this type. */
11824 fixup_type_variants (ref
);
11828 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11829 /* An aggregate cannot have baseclasses. */
11830 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11832 if (TREE_CODE (ref
) == UNION_TYPE
)
11834 error ("derived union %qT invalid", ref
);
11841 if (TYPE_FOR_JAVA (ref
))
11843 error ("Java class %qT cannot have multiple bases", ref
);
11850 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11852 if (TYPE_FOR_JAVA (ref
))
11854 error ("Java class %qT cannot have virtual bases", ref
);
11859 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11861 tree access
= TREE_PURPOSE (base_list
);
11862 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11863 tree basetype
= TREE_VALUE (base_list
);
11865 if (access
== access_default_node
)
11866 access
= default_access
;
11868 if (PACK_EXPANSION_P (basetype
))
11869 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11870 if (TREE_CODE (basetype
) == TYPE_DECL
)
11871 basetype
= TREE_TYPE (basetype
);
11872 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11874 error ("base type %qT fails to be a struct or class type",
11879 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11880 TYPE_FOR_JAVA (ref
) = 1;
11882 base_binfo
= NULL_TREE
;
11883 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
11885 base_binfo
= TYPE_BINFO (basetype
);
11886 /* The original basetype could have been a typedef'd type. */
11887 basetype
= BINFO_TYPE (base_binfo
);
11889 /* Inherit flags from the base. */
11890 TYPE_HAS_NEW_OPERATOR (ref
)
11891 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11892 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11893 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11894 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11895 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11896 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11897 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11898 CLASSTYPE_REPEATED_BASE_P (ref
)
11899 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11902 /* We must do this test after we've seen through a typedef
11904 if (TYPE_MARKED_P (basetype
))
11906 if (basetype
== ref
)
11907 error ("recursive type %qT undefined", basetype
);
11909 error ("duplicate base type %qT invalid", basetype
);
11913 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11914 /* Regenerate the pack expansion for the bases. */
11915 basetype
= make_pack_expansion (basetype
);
11917 TYPE_MARKED_P (basetype
) = 1;
11919 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11920 &igo_prev
, via_virtual
);
11921 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11922 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11924 BINFO_BASE_APPEND (binfo
, base_binfo
);
11925 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11928 if (VEC_length (tree
, CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
11929 /* If we didn't get max_vbases vbases, we must have shared at
11930 least one of them, and are therefore diamond shaped. */
11931 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11933 /* Unmark all the types. */
11934 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11935 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11936 TYPE_MARKED_P (ref
) = 0;
11938 /* Now see if we have a repeated base type. */
11939 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11941 for (base_binfo
= binfo
; base_binfo
;
11942 base_binfo
= TREE_CHAIN (base_binfo
))
11944 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11946 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11949 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11951 for (base_binfo
= binfo
; base_binfo
;
11952 base_binfo
= TREE_CHAIN (base_binfo
))
11953 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11954 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11963 /* Copies the enum-related properties from type SRC to type DST.
11964 Used with the underlying type of an enum and the enum itself. */
11966 copy_type_enum (tree dst
, tree src
)
11969 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
11971 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
11972 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
11973 TYPE_SIZE (t
) = TYPE_SIZE (src
);
11974 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
11975 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
11976 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
11977 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
11978 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
11979 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
11983 /* Begin compiling the definition of an enumeration type.
11986 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11988 UNDERLYING_TYPE is the type that will be used as the storage for
11989 the enumeration type. This should be NULL_TREE if no storage type
11992 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11994 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11996 Returns the type object, as yet incomplete.
11997 Also records info about it so that build_enumerator
11998 may be used to declare the individual values as they are read. */
12001 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12002 bool scoped_enum_p
, bool *is_new
)
12004 tree prevtype
= NULL_TREE
;
12005 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
12009 /* [C++0x dcl.enum]p5:
12011 If not explicitly specified, the underlying type of a scoped
12012 enumeration type is int. */
12013 if (!underlying_type
&& scoped_enum_p
)
12014 underlying_type
= integer_type_node
;
12016 if (underlying_type
)
12017 underlying_type
= cv_unqualified (underlying_type
);
12019 /* If this is the real definition for a previous forward reference,
12020 fill in the contents in the same object that used to be the
12021 forward reference. */
12023 enumtype
= lookup_and_check_tag (enum_type
, name
,
12024 /*tag_scope=*/ts_current
,
12025 /*template_header_p=*/false);
12027 /* In case of a template_decl, the only check that should be deferred
12028 to instantiation time is the comparison of underlying types. */
12029 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12031 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12033 error_at (input_location
, "scoped/unscoped mismatch "
12034 "in enum %q#T", enumtype
);
12035 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12036 "previous definition here");
12037 enumtype
= error_mark_node
;
12039 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12041 error_at (input_location
, "underlying type mismatch "
12042 "in enum %q#T", enumtype
);
12043 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12044 "previous definition here");
12045 enumtype
= error_mark_node
;
12047 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12048 && !dependent_type_p (underlying_type
)
12049 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12050 && !same_type_p (underlying_type
,
12051 ENUM_UNDERLYING_TYPE (enumtype
)))
12053 error_at (input_location
, "different underlying type "
12054 "in enum %q#T", enumtype
);
12055 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12056 "previous definition here");
12057 underlying_type
= NULL_TREE
;
12061 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12062 || processing_template_decl
)
12064 /* In case of error, make a dummy enum to allow parsing to
12066 if (enumtype
== error_mark_node
)
12068 name
= make_anon_name ();
12069 enumtype
= NULL_TREE
;
12072 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12073 of an opaque enum, or an opaque enum of an already defined
12074 enumeration (C++0x only).
12075 In any other case, it'll be NULL_TREE. */
12081 prevtype
= enumtype
;
12083 /* Do not push the decl more than once, unless we need to
12084 compare underlying types at instantiation time */
12086 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12087 || (underlying_type
12088 && dependent_type_p (underlying_type
))
12089 || (ENUM_UNDERLYING_TYPE (enumtype
)
12090 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12092 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12093 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12096 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12099 if (enumtype
== error_mark_node
)
12100 return error_mark_node
;
12102 /* The enum is considered opaque until the opening '{' of the
12103 enumerator list. */
12104 SET_OPAQUE_ENUM_P (enumtype
, true);
12105 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12108 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12110 if (underlying_type
)
12112 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12114 copy_type_enum (enumtype
, underlying_type
);
12115 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12117 else if (dependent_type_p (underlying_type
))
12118 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12120 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12121 underlying_type
, enumtype
);
12124 /* If into a template class, the returned enum is always the first
12125 declaration (opaque or not) seen. This way all the references to
12126 this type will be to the same declaration. The following ones are used
12127 only to check for definition errors. */
12128 if (prevtype
&& processing_template_decl
)
12134 /* After processing and defining all the values of an enumeration type,
12135 install their decls in the enumeration type.
12136 ENUMTYPE is the type object. */
12139 finish_enum_value_list (tree enumtype
)
12142 tree underlying_type
;
12145 tree minnode
, maxnode
;
12148 bool fixed_underlying_type_p
12149 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12151 /* We built up the VALUES in reverse order. */
12152 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12154 /* For an enum defined in a template, just set the type of the values;
12155 all further processing is postponed until the template is
12156 instantiated. We need to set the type so that tsubst of a CONST_DECL
12158 if (processing_template_decl
)
12160 for (values
= TYPE_VALUES (enumtype
);
12162 values
= TREE_CHAIN (values
))
12163 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12167 /* Determine the minimum and maximum values of the enumerators. */
12168 if (TYPE_VALUES (enumtype
))
12170 minnode
= maxnode
= NULL_TREE
;
12172 for (values
= TYPE_VALUES (enumtype
);
12174 values
= TREE_CHAIN (values
))
12176 decl
= TREE_VALUE (values
);
12178 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12179 each enumerator has the type of its enumeration. Prior to the
12180 closing brace, the type of each enumerator is the type of its
12181 initializing value. */
12182 TREE_TYPE (decl
) = enumtype
;
12184 /* Update the minimum and maximum values, if appropriate. */
12185 value
= DECL_INITIAL (decl
);
12186 if (value
== error_mark_node
)
12187 value
= integer_zero_node
;
12188 /* Figure out what the minimum and maximum values of the
12189 enumerators are. */
12191 minnode
= maxnode
= value
;
12192 else if (tree_int_cst_lt (maxnode
, value
))
12194 else if (tree_int_cst_lt (value
, minnode
))
12201 If the enumerator-list is empty, the underlying type is as if
12202 the enumeration had a single enumerator with value 0. */
12203 minnode
= maxnode
= integer_zero_node
;
12205 if (!fixed_underlying_type_p
)
12207 /* Compute the number of bits require to represent all values of the
12208 enumeration. We must do this before the type of MINNODE and
12209 MAXNODE are transformed, since tree_int_cst_min_precision relies
12210 on the TREE_TYPE of the value it is passed. */
12211 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12212 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12213 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12214 int precision
= MAX (lowprec
, highprec
);
12216 bool use_short_enum
;
12218 /* Determine the underlying type of the enumeration.
12222 The underlying type of an enumeration is an integral type that
12223 can represent all the enumerator values defined in the
12224 enumeration. It is implementation-defined which integral type is
12225 used as the underlying type for an enumeration except that the
12226 underlying type shall not be larger than int unless the value of
12227 an enumerator cannot fit in an int or unsigned int.
12229 We use "int" or an "unsigned int" as the underlying type, even if
12230 a smaller integral type would work, unless the user has
12231 explicitly requested that we use the smallest possible type. The
12232 user can request that for all enumerations with a command line
12233 flag, or for just one enumeration with an attribute. */
12235 use_short_enum
= flag_short_enums
12236 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12238 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12242 underlying_type
= integer_types
[itk
];
12243 if (underlying_type
!= NULL_TREE
12244 && TYPE_PRECISION (underlying_type
) >= precision
12245 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12248 if (itk
== itk_none
)
12252 IF no integral type can represent all the enumerator values, the
12253 enumeration is ill-formed. */
12254 error ("no integral type can represent all of the enumerator values "
12255 "for %qT", enumtype
);
12256 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12257 underlying_type
= integer_types
[itk_unsigned_long_long
];
12262 The value of sizeof() applied to an enumeration type, an object
12263 of an enumeration type, or an enumerator, is the value of sizeof()
12264 applied to the underlying type. */
12265 copy_type_enum (enumtype
, underlying_type
);
12267 /* Compute the minimum and maximum values for the type.
12271 For an enumeration where emin is the smallest enumerator and emax
12272 is the largest, the values of the enumeration are the values of the
12273 underlying type in the range bmin to bmax, where bmin and bmax are,
12274 respectively, the smallest and largest values of the smallest bit-
12275 field that can store emin and emax. */
12277 /* The middle-end currently assumes that types with TYPE_PRECISION
12278 narrower than their underlying type are suitably zero or sign
12279 extended to fill their mode. Similarly, it assumes that the front
12280 end assures that a value of a particular type must be within
12281 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12283 We used to set these fields based on bmin and bmax, but that led
12284 to invalid assumptions like optimizing away bounds checking. So
12285 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12286 TYPE_MAX_VALUE to the values for the mode above and only restrict
12287 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12288 ENUM_UNDERLYING_TYPE (enumtype
)
12289 = build_distinct_type_copy (underlying_type
);
12290 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12291 set_min_and_max_values_for_integral_type
12292 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12294 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12295 if (flag_strict_enums
)
12296 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12300 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12302 /* Convert each of the enumerators to the type of the underlying
12303 type of the enumeration. */
12304 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12306 location_t saved_location
;
12308 decl
= TREE_VALUE (values
);
12309 saved_location
= input_location
;
12310 input_location
= DECL_SOURCE_LOCATION (decl
);
12311 if (fixed_underlying_type_p
)
12312 /* If the enumeration type has a fixed underlying type, we
12313 already checked all of the enumerator values. */
12314 value
= DECL_INITIAL (decl
);
12316 value
= perform_implicit_conversion (underlying_type
,
12317 DECL_INITIAL (decl
),
12318 tf_warning_or_error
);
12319 input_location
= saved_location
;
12321 /* Do not clobber shared ints. */
12322 value
= copy_node (value
);
12324 TREE_TYPE (value
) = enumtype
;
12325 DECL_INITIAL (decl
) = value
;
12328 /* Fix up all variant types of this enum type. */
12329 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12330 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12332 /* Finish debugging output for this type. */
12333 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12336 /* Finishes the enum type. This is called only the first time an
12337 enumeration is seen, be it opaque or odinary.
12338 ENUMTYPE is the type object. */
12341 finish_enum (tree enumtype
)
12343 if (processing_template_decl
)
12345 if (at_function_scope_p ())
12346 add_stmt (build_min (TAG_DEFN
, enumtype
));
12350 /* If this is a forward declaration, there should not be any variants,
12351 though we can get a variant in the middle of an enum-specifier with
12352 wacky code like 'enum E { e = sizeof(const E*) };' */
12353 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12354 && (TYPE_VALUES (enumtype
)
12355 || !TYPE_NEXT_VARIANT (enumtype
)));
12358 /* Build and install a CONST_DECL for an enumeration constant of the
12359 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12360 LOC is the location of NAME.
12361 Assignment of sequential values by default is handled here. */
12364 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12370 /* If the VALUE was erroneous, pretend it wasn't there; that will
12371 result in the enum being assigned the next value in sequence. */
12372 if (value
== error_mark_node
)
12375 /* Remove no-op casts from the value. */
12377 STRIP_TYPE_NOPS (value
);
12379 if (! processing_template_decl
)
12381 /* Validate and default VALUE. */
12382 if (value
!= NULL_TREE
)
12384 value
= cxx_constant_value (value
);
12386 if (TREE_CODE (value
) != INTEGER_CST
12387 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12389 error ("enumerator value for %qD is not an integer constant",
12395 /* Default based on previous value. */
12396 if (value
== NULL_TREE
)
12398 if (TYPE_VALUES (enumtype
))
12401 unsigned HOST_WIDE_INT lo
;
12405 /* C++03 7.2/4: If no initializer is specified for the first
12406 enumerator, the type is an unspecified integral
12407 type. Otherwise the type is the same as the type of the
12408 initializing value of the preceding enumerator unless the
12409 incremented value is not representable in that type, in
12410 which case the type is an unspecified integral type
12411 sufficient to contain the incremented value. */
12412 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12413 if (error_operand_p (prev_value
))
12414 value
= error_mark_node
;
12417 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
12418 TREE_INT_CST_HIGH (prev_value
),
12423 tree type
= TREE_TYPE (prev_value
);
12424 bool pos
= (TYPE_UNSIGNED (type
) || hi
>= 0);
12425 di
.low
= lo
; di
.high
= hi
;
12426 if (!double_int_fits_to_tree_p (type
, di
))
12429 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12431 type
= integer_types
[itk
];
12432 if (type
!= NULL_TREE
12433 && (pos
|| !TYPE_UNSIGNED (type
))
12434 && double_int_fits_to_tree_p (type
, di
))
12437 if (type
&& cxx_dialect
< cxx0x
12438 && itk
> itk_unsigned_long
)
12439 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12440 incremented enumerator value is too large for %<unsigned long%>" : "\
12441 incremented enumerator value is too large for %<long%>");
12443 if (type
== NULL_TREE
)
12446 value
= double_int_to_tree (type
, di
);
12451 error ("overflow in enumeration values at %qD", name
);
12452 value
= error_mark_node
;
12457 value
= integer_zero_node
;
12460 /* Remove no-op casts from the value. */
12461 STRIP_TYPE_NOPS (value
);
12463 /* If the underlying type of the enum is fixed, check whether
12464 the enumerator values fits in the underlying type. If it
12465 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12466 if (ENUM_UNDERLYING_TYPE (enumtype
)
12468 && TREE_CODE (value
) == INTEGER_CST
12469 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12471 error ("enumerator value %E is too large for underlying type %<%T%>",
12472 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12474 /* Silently convert the value so that we can continue. */
12475 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12480 /* C++ associates enums with global, function, or class declarations. */
12481 context
= current_scope ();
12483 /* Build the actual enumeration constant. Note that the enumeration
12484 constants have the underlying type of the enum (if it is fixed)
12485 or the type of their initializer (if the underlying type of the
12486 enum is not fixed):
12490 If the underlying type is fixed, the type of each enumerator
12491 prior to the closing brace is the underlying type; if the
12492 initializing value of an enumerator cannot be represented by
12493 the underlying type, the program is ill-formed. If the
12494 underlying type is not fixed, the type of each enumerator is
12495 the type of its initializing value.
12497 If the underlying type is not fixed, it will be computed by
12498 finish_enum and we will reset the type of this enumerator. Of
12499 course, if we're processing a template, there may be no value. */
12500 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12502 if (context
&& context
== current_class_type
)
12503 /* This enum declaration is local to the class. We need the full
12504 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12505 decl
= build_lang_decl_loc (loc
, CONST_DECL
, name
, type
);
12507 /* It's a global enum, or it's local to a function. (Note local to
12508 a function could mean local to a class method. */
12509 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12511 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12512 TREE_CONSTANT (decl
) = 1;
12513 TREE_READONLY (decl
) = 1;
12514 DECL_INITIAL (decl
) = value
;
12516 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12517 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12518 on the TYPE_FIELDS list for `S'. (That's so that you can say
12519 things like `S::i' later.) */
12520 finish_member_declaration (decl
);
12524 /* Add this enumeration constant to the list for this type. */
12525 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12528 /* Look for an enumerator with the given NAME within the enumeration
12529 type ENUMTYPE. This routine is used primarily for qualified name
12530 lookup into an enumerator in C++0x, e.g.,
12532 enum class Color { Red, Green, Blue };
12534 Color color = Color::Red;
12536 Returns the value corresponding to the enumerator, or
12537 NULL_TREE if no such enumerator was found. */
12539 lookup_enumerator (tree enumtype
, tree name
)
12542 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12544 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12545 return e
? TREE_VALUE (e
) : NULL_TREE
;
12549 /* We're defining DECL. Make sure that its type is OK. */
12552 check_function_type (tree decl
, tree current_function_parms
)
12554 tree fntype
= TREE_TYPE (decl
);
12555 tree return_type
= complete_type (TREE_TYPE (fntype
));
12557 /* In a function definition, arg types must be complete. */
12558 require_complete_types_for_parms (current_function_parms
);
12560 if (dependent_type_p (return_type
))
12562 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12563 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12565 tree args
= TYPE_ARG_TYPES (fntype
);
12567 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12568 error ("return type %q#T is incomplete", return_type
);
12570 error ("return type has Java class type %q#T", return_type
);
12572 /* Make it return void instead. */
12573 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12574 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12576 TREE_CHAIN (args
));
12578 fntype
= build_function_type (void_type_node
, args
);
12580 = build_exception_variant (fntype
,
12581 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12582 fntype
= (cp_build_type_attribute_variant
12583 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12584 TREE_TYPE (decl
) = fntype
;
12587 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12590 /* Create the FUNCTION_DECL for a function definition.
12591 DECLSPECS and DECLARATOR are the parts of the declaration;
12592 they describe the function's name and the type it returns,
12593 but twisted together in a fashion that parallels the syntax of C.
12595 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12596 DECLARATOR is really the DECL for the function we are about to
12597 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12598 indicating that the function is an inline defined in-class.
12600 This function creates a binding context for the function body
12601 as well as setting up the FUNCTION_DECL in current_function_decl.
12603 For C++, we must first check whether that datum makes any sense.
12604 For example, "class A local_a(1,2);" means that variable local_a
12605 is an aggregate of type A, which should have a constructor
12606 applied to it with the argument list [1, 2].
12608 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12609 or may be a BLOCK if the function has been defined previously
12610 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12611 error_mark_node if the function has never been defined, or
12612 a BLOCK if the function has been defined somewhere. */
12615 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12617 tree ctype
= NULL_TREE
;
12620 int doing_friend
= 0;
12621 cp_binding_level
*bl
;
12622 tree current_function_parms
;
12623 struct c_fileinfo
*finfo
12624 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12625 bool honor_interface
;
12627 /* Sanity check. */
12628 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12629 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12631 fntype
= TREE_TYPE (decl1
);
12632 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12633 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12635 /* ISO C++ 11.4/5. A friend function defined in a class is in
12636 the (lexical) scope of the class in which it is defined. */
12637 if (!ctype
&& DECL_FRIEND_P (decl1
))
12639 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12641 /* CTYPE could be null here if we're dealing with a template;
12642 for example, `inline friend float foo()' inside a template
12643 will have no CTYPE set. */
12644 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12650 if (DECL_DECLARED_INLINE_P (decl1
)
12651 && lookup_attribute ("noinline", attrs
))
12652 warning (0, "inline function %q+D given attribute noinline", decl1
);
12654 /* Handle gnu_inline attribute. */
12655 if (GNU_INLINE_P (decl1
))
12657 DECL_EXTERNAL (decl1
) = 1;
12658 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12659 DECL_INTERFACE_KNOWN (decl1
) = 1;
12660 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12663 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12664 /* This is a constructor, we must ensure that any default args
12665 introduced by this definition are propagated to the clones
12666 now. The clones are used directly in overload resolution. */
12667 adjust_clone_args (decl1
);
12669 /* Sometimes we don't notice that a function is a static member, and
12670 build a METHOD_TYPE for it. Fix that up now. */
12671 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12672 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12674 /* Set up current_class_type, and enter the scope of the class, if
12677 push_nested_class (ctype
);
12678 else if (DECL_STATIC_FUNCTION_P (decl1
))
12679 push_nested_class (DECL_CONTEXT (decl1
));
12681 /* Now that we have entered the scope of the class, we must restore
12682 the bindings for any template parameters surrounding DECL1, if it
12683 is an inline member template. (Order is important; consider the
12684 case where a template parameter has the same name as a field of
12685 the class.) It is not until after this point that
12686 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12687 if (flags
& SF_INCLASS_INLINE
)
12688 maybe_begin_member_template_processing (decl1
);
12690 /* Effective C++ rule 15. */
12692 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12693 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12694 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
12696 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12697 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12698 if (!DECL_INITIAL (decl1
))
12699 DECL_INITIAL (decl1
) = error_mark_node
;
12701 /* This function exists in static storage.
12702 (This does not mean `static' in the C sense!) */
12703 TREE_STATIC (decl1
) = 1;
12705 /* We must call push_template_decl after current_class_type is set
12706 up. (If we are processing inline definitions after exiting a
12707 class scope, current_class_type will be NULL_TREE until set above
12708 by push_nested_class.) */
12709 if (processing_template_decl
)
12711 /* FIXME: Handle error_mark_node more gracefully. */
12712 tree newdecl1
= push_template_decl (decl1
);
12713 if (newdecl1
!= error_mark_node
)
12717 /* We are now in the scope of the function being defined. */
12718 current_function_decl
= decl1
;
12720 /* Save the parm names or decls from this function's declarator
12721 where store_parm_decls will find them. */
12722 current_function_parms
= DECL_ARGUMENTS (decl1
);
12724 /* Make sure the parameter and return types are reasonable. When
12725 you declare a function, these types can be incomplete, but they
12726 must be complete when you define the function. */
12727 check_function_type (decl1
, current_function_parms
);
12729 /* Build the return declaration for the function. */
12730 restype
= TREE_TYPE (fntype
);
12731 if (DECL_RESULT (decl1
) == NULL_TREE
)
12735 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
12736 DECL_ARTIFICIAL (resdecl
) = 1;
12737 DECL_IGNORED_P (resdecl
) = 1;
12738 DECL_RESULT (decl1
) = resdecl
;
12740 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
12743 /* Let the user know we're compiling this function. */
12744 announce_function (decl1
);
12746 /* Record the decl so that the function name is defined.
12747 If we already have a decl for this name, and it is a FUNCTION_DECL,
12748 use the old decl. */
12749 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12751 /* A specialization is not used to guide overload resolution. */
12752 if (!DECL_FUNCTION_MEMBER_P (decl1
)
12753 && !(DECL_USE_TEMPLATE (decl1
) &&
12754 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
12756 tree olddecl
= pushdecl (decl1
);
12758 if (olddecl
== error_mark_node
)
12759 /* If something went wrong when registering the declaration,
12760 use DECL1; we have to have a FUNCTION_DECL to use when
12761 parsing the body of the function. */
12765 /* Otherwise, OLDDECL is either a previous declaration
12766 of the same function or DECL1 itself. */
12768 if (warn_missing_declarations
12769 && olddecl
== decl1
12770 && !DECL_MAIN_P (decl1
)
12771 && TREE_PUBLIC (decl1
)
12772 && !DECL_DECLARED_INLINE_P (decl1
))
12776 /* Check whether DECL1 is in an anonymous
12778 for (context
= DECL_CONTEXT (decl1
);
12780 context
= DECL_CONTEXT (context
))
12782 if (TREE_CODE (context
) == NAMESPACE_DECL
12783 && DECL_NAME (context
) == NULL_TREE
)
12787 if (context
== NULL
)
12788 warning (OPT_Wmissing_declarations
,
12789 "no previous declaration for %q+D", decl1
);
12797 /* We need to set the DECL_CONTEXT. */
12798 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12799 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12801 fntype
= TREE_TYPE (decl1
);
12803 /* If #pragma weak applies, mark the decl appropriately now.
12804 The pragma only applies to global functions. Because
12805 determining whether or not the #pragma applies involves
12806 computing the mangled name for the declaration, we cannot
12807 apply the pragma until after we have merged this declaration
12808 with any previous declarations; if the original declaration
12809 has a linkage specification, that specification applies to
12810 the definition as well, and may affect the mangled name. */
12811 if (DECL_FILE_SCOPE_P (decl1
))
12812 maybe_apply_pragma_weak (decl1
);
12815 /* Reset this in case the call to pushdecl changed it. */
12816 current_function_decl
= decl1
;
12818 gcc_assert (DECL_INITIAL (decl1
));
12820 /* This function may already have been parsed, in which case just
12821 return; our caller will skip over the body without parsing. */
12822 if (DECL_INITIAL (decl1
) != error_mark_node
)
12825 /* Initialize RTL machinery. We cannot do this until
12826 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12827 even when processing a template; this is how we get
12828 CFUN set up, and our per-function variables initialized.
12829 FIXME factor out the non-RTL stuff. */
12830 bl
= current_binding_level
;
12831 allocate_struct_function (decl1
, processing_template_decl
);
12833 /* Initialize the language data structures. Whenever we start
12834 a new function, we destroy temporaries in the usual way. */
12835 cfun
->language
= ggc_alloc_cleared_language_function ();
12836 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12837 current_binding_level
= bl
;
12839 /* Start the statement-tree, start the tree now. */
12840 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12842 /* If we are (erroneously) defining a function that we have already
12843 defined before, wipe out what we knew before. */
12844 if (!DECL_PENDING_INLINE_P (decl1
))
12845 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12847 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12849 /* We know that this was set up by `grokclassfn'. We do not
12850 wait until `store_parm_decls', since evil parse errors may
12851 never get us to that point. Here we keep the consistency
12852 between `current_class_type' and `current_class_ptr'. */
12853 tree t
= DECL_ARGUMENTS (decl1
);
12855 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12856 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12858 cp_function_chain
->x_current_class_ref
12859 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12860 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12861 cp_function_chain
->x_current_class_ptr
= t
;
12863 /* Constructors and destructors need to know whether they're "in
12864 charge" of initializing virtual base classes. */
12865 t
= DECL_CHAIN (t
);
12866 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12868 current_in_charge_parm
= t
;
12869 t
= DECL_CHAIN (t
);
12871 if (DECL_HAS_VTT_PARM_P (decl1
))
12873 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12874 current_vtt_parm
= t
;
12878 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12879 /* Implicitly-defined methods (like the
12880 destructor for a class in which no destructor
12881 is explicitly declared) must not be defined
12882 until their definition is needed. So, we
12883 ignore interface specifications for
12884 compiler-generated functions. */
12885 && !DECL_ARTIFICIAL (decl1
));
12887 if (processing_template_decl
)
12888 /* Don't mess with interface flags. */;
12889 else if (DECL_INTERFACE_KNOWN (decl1
))
12891 tree ctx
= decl_function_context (decl1
);
12893 if (DECL_NOT_REALLY_EXTERN (decl1
))
12894 DECL_EXTERNAL (decl1
) = 0;
12896 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12897 && TREE_PUBLIC (ctx
))
12898 /* This is a function in a local class in an extern inline
12900 comdat_linkage (decl1
);
12902 /* If this function belongs to an interface, it is public.
12903 If it belongs to someone else's interface, it is also external.
12904 This only affects inlines and template instantiations. */
12905 else if (!finfo
->interface_unknown
&& honor_interface
)
12907 if (DECL_DECLARED_INLINE_P (decl1
)
12908 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12910 DECL_EXTERNAL (decl1
)
12911 = (finfo
->interface_only
12912 || (DECL_DECLARED_INLINE_P (decl1
)
12913 && ! flag_implement_inlines
12914 && !DECL_VINDEX (decl1
)));
12916 /* For WIN32 we also want to put these in linkonce sections. */
12917 maybe_make_one_only (decl1
);
12920 DECL_EXTERNAL (decl1
) = 0;
12921 DECL_INTERFACE_KNOWN (decl1
) = 1;
12922 /* If this function is in an interface implemented in this file,
12923 make sure that the back end knows to emit this function
12925 if (!DECL_EXTERNAL (decl1
))
12926 mark_needed (decl1
);
12928 else if (finfo
->interface_unknown
&& finfo
->interface_only
12929 && honor_interface
)
12931 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12932 interface, we will have both finfo->interface_unknown and
12933 finfo->interface_only set. In that case, we don't want to
12934 use the normal heuristics because someone will supply a
12935 #pragma implementation elsewhere, and deducing it here would
12936 produce a conflict. */
12937 comdat_linkage (decl1
);
12938 DECL_EXTERNAL (decl1
) = 0;
12939 DECL_INTERFACE_KNOWN (decl1
) = 1;
12940 DECL_DEFER_OUTPUT (decl1
) = 1;
12944 /* This is a definition, not a reference.
12945 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12946 if (!GNU_INLINE_P (decl1
))
12947 DECL_EXTERNAL (decl1
) = 0;
12949 if ((DECL_DECLARED_INLINE_P (decl1
)
12950 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12951 && ! DECL_INTERFACE_KNOWN (decl1
))
12952 DECL_DEFER_OUTPUT (decl1
) = 1;
12954 DECL_INTERFACE_KNOWN (decl1
) = 1;
12957 /* Determine the ELF visibility attribute for the function. We must not
12958 do this before calling "pushdecl", as we must allow "duplicate_decls"
12959 to merge any attributes appropriately. We also need to wait until
12961 if (!DECL_CLONED_FUNCTION_P (decl1
))
12962 determine_visibility (decl1
);
12964 begin_scope (sk_function_parms
, decl1
);
12968 if (DECL_DESTRUCTOR_P (decl1
)
12969 || (DECL_CONSTRUCTOR_P (decl1
)
12970 && targetm
.cxx
.cdtor_returns_this ()))
12972 cdtor_label
= build_decl (input_location
,
12973 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12974 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12977 start_fname_decls ();
12979 store_parm_decls (current_function_parms
);
12983 /* Like start_preparsed_function, except that instead of a
12984 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12986 Returns 1 on success. If the DECLARATOR is not suitable for a function
12987 (it defines a datum instead), we return 0, which tells
12988 yyparse to report a parse error. */
12991 start_function (cp_decl_specifier_seq
*declspecs
,
12992 const cp_declarator
*declarator
,
12997 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
12998 if (decl1
== error_mark_node
)
13000 /* If the declarator is not suitable for a function definition,
13001 cause a syntax error. */
13002 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13004 error ("invalid function declaration");
13008 if (DECL_MAIN_P (decl1
))
13009 /* main must return int. grokfndecl should have corrected it
13010 (and issued a diagnostic) if the user got it wrong. */
13011 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13012 integer_type_node
));
13014 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13019 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13023 use_eh_spec_block (tree fn
)
13025 return (flag_exceptions
&& flag_enforce_eh_specs
13026 && !processing_template_decl
13027 && !type_throw_all_p (TREE_TYPE (fn
))
13028 /* We insert the EH_SPEC_BLOCK only in the original
13029 function; then, it is copied automatically to the
13031 && !DECL_CLONED_FUNCTION_P (fn
)
13032 /* Implicitly-generated constructors and destructors have
13033 exception specifications. However, those specifications
13034 are the union of the possible exceptions specified by the
13035 constructors/destructors for bases and members, so no
13036 unallowed exception will ever reach this function. By
13037 not creating the EH_SPEC_BLOCK we save a little memory,
13038 and we avoid spurious warnings about unreachable
13040 && !DECL_DEFAULTED_FN (fn
));
13043 /* Store the parameter declarations into the current function declaration.
13044 This is called after parsing the parameter declarations, before
13045 digesting the body of the function.
13047 Also install to binding contour return value identifier, if any. */
13050 store_parm_decls (tree current_function_parms
)
13052 tree fndecl
= current_function_decl
;
13055 /* This is a chain of any other decls that came in among the parm
13056 declarations. If a parm is declared with enum {foo, bar} x;
13057 then CONST_DECLs for foo and bar are put here. */
13058 tree nonparms
= NULL_TREE
;
13060 if (current_function_parms
)
13062 /* This case is when the function was defined with an ANSI prototype.
13063 The parms already have decls, so we need not do anything here
13064 except record them as in effect
13065 and complain if any redundant old-style parm decls were written. */
13067 tree specparms
= current_function_parms
;
13070 /* Must clear this because it might contain TYPE_DECLs declared
13072 current_binding_level
->names
= NULL
;
13074 /* If we're doing semantic analysis, then we'll call pushdecl
13075 for each of these. We must do them in reverse order so that
13076 they end in the correct forward order. */
13077 specparms
= nreverse (specparms
);
13079 for (parm
= specparms
; parm
; parm
= next
)
13081 next
= DECL_CHAIN (parm
);
13082 if (TREE_CODE (parm
) == PARM_DECL
)
13084 if (DECL_NAME (parm
) == NULL_TREE
13085 || TREE_CODE (parm
) != VOID_TYPE
)
13088 error ("parameter %qD declared void", parm
);
13092 /* If we find an enum constant or a type tag,
13093 put it aside for the moment. */
13094 TREE_CHAIN (parm
) = NULL_TREE
;
13095 nonparms
= chainon (nonparms
, parm
);
13099 /* Get the decls in their original chain order and record in the
13100 function. This is all and only the PARM_DECLs that were
13101 pushed into scope by the loop above. */
13102 DECL_ARGUMENTS (fndecl
) = getdecls ();
13105 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13107 /* Now store the final chain of decls for the arguments
13108 as the decl-chain of the current lexical scope.
13109 Put the enumerators in as well, at the front so that
13110 DECL_ARGUMENTS is not modified. */
13111 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13113 if (use_eh_spec_block (current_function_decl
))
13114 current_eh_spec_block
= begin_eh_spec_block ();
13118 /* We have finished doing semantic analysis on DECL, but have not yet
13119 generated RTL for its body. Save away our current state, so that
13120 when we want to generate RTL later we know what to do. */
13123 save_function_data (tree decl
)
13125 struct language_function
*f
;
13127 /* Save the language-specific per-function data so that we can
13128 get it back when we really expand this function. */
13129 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13132 f
= ggc_alloc_language_function ();
13133 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13134 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13136 /* Clear out the bits we don't need. */
13137 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13138 f
->bindings
= NULL
;
13139 f
->x_local_names
= NULL
;
13140 f
->base
.local_typedefs
= NULL
;
13144 /* Set the return value of the constructor (if present). */
13147 finish_constructor_body (void)
13152 if (targetm
.cxx
.cdtor_returns_this ()
13153 && (! TYPE_FOR_JAVA (current_class_type
)))
13155 /* Any return from a constructor will end up here. */
13156 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13158 val
= DECL_ARGUMENTS (current_function_decl
);
13159 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13160 DECL_RESULT (current_function_decl
), val
);
13161 /* Return the address of the object. */
13162 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13163 add_stmt (exprstmt
);
13167 /* Do all the processing for the beginning of a destructor; set up the
13168 vtable pointers and cleanups for bases and members. */
13171 begin_destructor_body (void)
13173 tree compound_stmt
;
13175 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13176 issued an error message. We still want to try to process the
13177 body of the function, but initialize_vtbl_ptrs will crash if
13178 TYPE_BINFO is NULL. */
13179 if (COMPLETE_TYPE_P (current_class_type
))
13181 compound_stmt
= begin_compound_stmt (0);
13182 /* Make all virtual function table pointers in non-virtual base
13183 classes point to CURRENT_CLASS_TYPE's virtual function
13185 initialize_vtbl_ptrs (current_class_ptr
);
13186 finish_compound_stmt (compound_stmt
);
13188 /* And insert cleanups for our bases and members so that they
13189 will be properly destroyed if we throw. */
13190 push_base_cleanups ();
13194 /* At the end of every destructor we generate code to delete the object if
13195 necessary. Do that now. */
13198 finish_destructor_body (void)
13202 /* Any return from a destructor will end up here; that way all base
13203 and member cleanups will be run when the function returns. */
13204 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13206 /* In a virtual destructor, we must call delete. */
13207 if (DECL_VIRTUAL_P (current_function_decl
))
13210 tree virtual_size
= cxx_sizeof (current_class_type
);
13214 At the point of definition of a virtual destructor (including
13215 an implicit definition), non-placement operator delete shall
13216 be looked up in the scope of the destructor's class and if
13217 found shall be accessible and unambiguous. */
13218 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
13220 /*global_p=*/false,
13221 /*placement=*/NULL_TREE
,
13222 /*alloc_fn=*/NULL_TREE
);
13224 if_stmt
= begin_if_stmt ();
13225 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13226 current_in_charge_parm
,
13229 finish_expr_stmt (exprstmt
);
13230 finish_then_clause (if_stmt
);
13231 finish_if_stmt (if_stmt
);
13234 if (targetm
.cxx
.cdtor_returns_this ())
13238 val
= DECL_ARGUMENTS (current_function_decl
);
13239 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13240 DECL_RESULT (current_function_decl
), val
);
13241 /* Return the address of the object. */
13242 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13243 add_stmt (exprstmt
);
13247 /* Do the necessary processing for the beginning of a function body, which
13248 in this case includes member-initializers, but not the catch clauses of
13249 a function-try-block. Currently, this means opening a binding level
13250 for the member-initializers (in a ctor), member cleanups (in a dtor),
13251 and capture proxies (in a lambda operator()). */
13254 begin_function_body (void)
13258 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13261 if (processing_template_decl
)
13262 /* Do nothing now. */;
13264 /* Always keep the BLOCK node associated with the outermost pair of
13265 curly braces of a function. These are needed for correct
13266 operation of dwarfout.c. */
13267 keep_next_level (true);
13269 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13271 if (processing_template_decl
)
13272 /* Do nothing now. */;
13273 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13274 begin_destructor_body ();
13279 /* Do the processing for the end of a function body. Currently, this means
13280 closing out the cleanups for fully-constructed bases and members, and in
13281 the case of the destructor, deleting the object if desired. Again, this
13282 is only meaningful for [cd]tors, since they are the only functions where
13283 there is a significant distinction between the main body and any
13284 function catch clauses. Handling, say, main() return semantics here
13285 would be wrong, as flowing off the end of a function catch clause for
13286 main() would also need to return 0. */
13289 finish_function_body (tree compstmt
)
13291 if (compstmt
== NULL_TREE
)
13294 /* Close the block. */
13295 finish_compound_stmt (compstmt
);
13297 if (processing_template_decl
)
13298 /* Do nothing now. */;
13299 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13300 finish_constructor_body ();
13301 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13302 finish_destructor_body ();
13305 /* Given a function, returns the BLOCK corresponding to the outermost level
13306 of curly braces, skipping the artificial block created for constructor
13310 outer_curly_brace_block (tree fndecl
)
13312 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13313 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13314 /* Skip the artificial function body block. */
13315 block
= BLOCK_SUBBLOCKS (block
);
13319 /* If FNDECL is a class's key method, add the class to the list of
13320 keyed classes that should be emitted. */
13323 record_key_method_defined (tree fndecl
)
13325 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13326 && DECL_VIRTUAL_P (fndecl
)
13327 && !processing_template_decl
)
13329 tree fnclass
= DECL_CONTEXT (fndecl
);
13330 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13331 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13335 /* Subroutine of finish_function.
13336 Save the body of constexpr functions for possible
13337 future compile time evaluation. */
13340 maybe_save_function_definition (tree fun
)
13342 if (!processing_template_decl
13343 && DECL_DECLARED_CONSTEXPR_P (fun
)
13344 && !DECL_CLONED_FUNCTION_P (fun
))
13345 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13348 /* Finish up a function declaration and compile that function
13349 all the way to assembler language output. The free the storage
13350 for the function definition.
13352 FLAGS is a bitwise or of the following values:
13354 We just finished processing the body of an in-class inline
13355 function definition. (This processing will have taken place
13356 after the class definition is complete.) */
13359 finish_function (int flags
)
13361 tree fndecl
= current_function_decl
;
13362 tree fntype
, ctype
= NULL_TREE
;
13363 int inclass_inline
= (flags
& 2) != 0;
13365 /* When we get some parse errors, we can end up without a
13366 current_function_decl, so cope. */
13367 if (fndecl
== NULL_TREE
)
13368 return error_mark_node
;
13370 if (c_dialect_objc ())
13371 objc_finish_function ();
13373 gcc_assert (!defer_mark_used_calls
);
13374 defer_mark_used_calls
= true;
13376 record_key_method_defined (fndecl
);
13378 fntype
= TREE_TYPE (fndecl
);
13380 /* TREE_READONLY (fndecl) = 1;
13381 This caused &foo to be of type ptr-to-const-function
13382 which then got a warning when stored in a ptr-to-function variable. */
13384 gcc_assert (building_stmt_list_p ());
13385 /* The current function is being defined, so its DECL_INITIAL should
13386 be set, and unless there's a multiple definition, it should be
13387 error_mark_node. */
13388 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13390 /* For a cloned function, we've already got all the code we need;
13391 there's no need to add any extra bits. */
13392 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13394 if (DECL_MAIN_P (current_function_decl
))
13396 /* Make it so that `main' always returns 0 by default (or
13399 finish_return_stmt (integer_one_node
);
13401 finish_return_stmt (integer_zero_node
);
13405 if (use_eh_spec_block (current_function_decl
))
13406 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13407 (TREE_TYPE (current_function_decl
)),
13408 current_eh_spec_block
);
13411 /* If we're saving up tree structure, tie off the function now. */
13412 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13414 finish_fname_decls ();
13416 /* If this function can't throw any exceptions, remember that. */
13417 if (!processing_template_decl
13418 && !cp_function_chain
->can_throw
13419 && !flag_non_call_exceptions
13420 && !decl_replaceable_p (fndecl
))
13421 TREE_NOTHROW (fndecl
) = 1;
13423 /* This must come after expand_function_end because cleanups might
13424 have declarations (from inline functions) that need to go into
13425 this function's blocks. */
13427 /* If the current binding level isn't the outermost binding level
13428 for this function, either there is a bug, or we have experienced
13429 syntax errors and the statement tree is malformed. */
13430 if (current_binding_level
->kind
!= sk_function_parms
)
13432 /* Make sure we have already experienced errors. */
13433 gcc_assert (errorcount
);
13435 /* Throw away the broken statement tree and extra binding
13437 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13439 while (current_binding_level
->kind
!= sk_function_parms
)
13441 if (current_binding_level
->kind
== sk_class
)
13442 pop_nested_class ();
13444 poplevel (0, 0, 0);
13447 poplevel (1, 0, 1);
13449 /* Statements should always be full-expressions at the outermost set
13450 of curly braces for a function. */
13451 gcc_assert (stmts_are_full_exprs_p ());
13453 /* Save constexpr function body before it gets munged by
13454 the NRV transformation. */
13455 maybe_save_function_definition (fndecl
);
13457 /* Set up the named return value optimization, if we can. Candidate
13458 variables are selected in check_return_expr. */
13459 if (current_function_return_value
)
13461 tree r
= current_function_return_value
;
13464 if (r
!= error_mark_node
13465 /* This is only worth doing for fns that return in memory--and
13466 simpler, since we don't have to worry about promoted modes. */
13467 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13468 /* Only allow this for variables declared in the outer scope of
13469 the function so we know that their lifetime always ends with a
13470 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13471 we were to do this optimization in tree-ssa. */
13472 && (outer
= outer_curly_brace_block (fndecl
))
13473 && chain_member (r
, BLOCK_VARS (outer
)))
13474 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13476 current_function_return_value
= NULL_TREE
;
13479 /* Remember that we were in class scope. */
13480 if (current_class_name
)
13481 ctype
= current_class_type
;
13483 /* Must mark the RESULT_DECL as being in this function. */
13484 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13486 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13487 to the FUNCTION_DECL node itself. */
13488 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13490 /* Save away current state, if appropriate. */
13491 if (!processing_template_decl
)
13492 save_function_data (fndecl
);
13494 /* Complain if there's just no return statement. */
13495 if (warn_return_type
13496 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13497 && !dependent_type_p (TREE_TYPE (fntype
))
13498 && !current_function_returns_value
&& !current_function_returns_null
13499 /* Don't complain if we abort or throw. */
13500 && !current_function_returns_abnormally
13501 /* Don't complain if we are declared noreturn. */
13502 && !TREE_THIS_VOLATILE (fndecl
)
13503 && !DECL_NAME (DECL_RESULT (fndecl
))
13504 && !TREE_NO_WARNING (fndecl
)
13505 /* Structor return values (if any) are set by the compiler. */
13506 && !DECL_CONSTRUCTOR_P (fndecl
)
13507 && !DECL_DESTRUCTOR_P (fndecl
))
13509 warning (OPT_Wreturn_type
,
13510 "no return statement in function returning non-void");
13511 TREE_NO_WARNING (fndecl
) = 1;
13514 /* Store the end of the function, so that we get good line number
13515 info for the epilogue. */
13516 cfun
->function_end_locus
= input_location
;
13518 /* Complain about parameters that are only set, but never otherwise used. */
13519 if (warn_unused_but_set_parameter
13520 && !processing_template_decl
13521 && errorcount
== unused_but_set_errorcount
13522 && !DECL_CLONED_FUNCTION_P (fndecl
))
13526 for (decl
= DECL_ARGUMENTS (fndecl
);
13528 decl
= DECL_CHAIN (decl
))
13529 if (TREE_USED (decl
)
13530 && TREE_CODE (decl
) == PARM_DECL
13531 && !DECL_READ_P (decl
)
13532 && DECL_NAME (decl
)
13533 && !DECL_ARTIFICIAL (decl
)
13534 && !TREE_NO_WARNING (decl
)
13535 && !DECL_IN_SYSTEM_HEADER (decl
)
13536 && TREE_TYPE (decl
) != error_mark_node
13537 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13538 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13539 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13540 warning (OPT_Wunused_but_set_parameter
,
13541 "parameter %q+D set but not used", decl
);
13542 unused_but_set_errorcount
= errorcount
;
13545 /* Complain about locally defined typedefs that are not used in this
13547 maybe_warn_unused_local_typedefs ();
13549 /* Genericize before inlining. */
13550 if (!processing_template_decl
)
13552 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13553 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13554 cp_genericize (fndecl
);
13555 /* Clear out the bits we don't need. */
13556 f
->x_current_class_ptr
= NULL
;
13557 f
->x_current_class_ref
= NULL
;
13558 f
->x_eh_spec_block
= NULL
;
13559 f
->x_in_charge_parm
= NULL
;
13560 f
->x_vtt_parm
= NULL
;
13561 f
->x_return_value
= NULL
;
13562 f
->bindings
= NULL
;
13563 f
->extern_decl_map
= NULL
;
13565 /* Clear out the bits we don't need. */
13566 local_names
= NULL
;
13568 /* We're leaving the context of this function, so zap cfun. It's still in
13569 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13571 current_function_decl
= NULL
;
13573 /* If this is an in-class inline definition, we may have to pop the
13574 bindings for the template parameters that we added in
13575 maybe_begin_member_template_processing when start_function was
13577 if (inclass_inline
)
13578 maybe_end_member_template_processing ();
13580 /* Leave the scope of the class. */
13582 pop_nested_class ();
13587 current_function_decl
= NULL_TREE
;
13589 defer_mark_used_calls
= false;
13590 if (deferred_mark_used_calls
)
13595 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13597 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13603 /* Create the FUNCTION_DECL for a function definition.
13604 DECLSPECS and DECLARATOR are the parts of the declaration;
13605 they describe the return type and the name of the function,
13606 but twisted together in a fashion that parallels the syntax of C.
13608 This function creates a binding context for the function body
13609 as well as setting up the FUNCTION_DECL in current_function_decl.
13611 Returns a FUNCTION_DECL on success.
13613 If the DECLARATOR is not suitable for a function (it defines a datum
13614 instead), we return 0, which tells yyparse to report a parse error.
13616 May return void_type_node indicating that this method is actually
13617 a friend. See grokfield for more details.
13619 Came here with a `.pushlevel' .
13621 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13622 CHANGES TO CODE IN `grokfield'. */
13625 grokmethod (cp_decl_specifier_seq
*declspecs
,
13626 const cp_declarator
*declarator
, tree attrlist
)
13628 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13631 if (fndecl
== error_mark_node
)
13632 return error_mark_node
;
13634 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13636 error ("invalid member function declaration");
13637 return error_mark_node
;
13641 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13643 /* Pass friends other than inline friend functions back. */
13644 if (fndecl
== void_type_node
)
13647 if (DECL_IN_AGGR_P (fndecl
))
13649 if (DECL_CLASS_SCOPE_P (fndecl
))
13650 error ("%qD is already defined in class %qT", fndecl
,
13651 DECL_CONTEXT (fndecl
));
13652 return error_mark_node
;
13655 check_template_shadow (fndecl
);
13657 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13658 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13660 /* We process method specializations in finish_struct_1. */
13661 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13663 fndecl
= push_template_decl (fndecl
);
13664 if (fndecl
== error_mark_node
)
13668 if (! DECL_FRIEND_P (fndecl
))
13670 if (DECL_CHAIN (fndecl
))
13672 fndecl
= copy_node (fndecl
);
13673 TREE_CHAIN (fndecl
) = NULL_TREE
;
13677 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
13679 DECL_IN_AGGR_P (fndecl
) = 1;
13684 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13685 we can lay it out later, when and if its type becomes complete. */
13688 maybe_register_incomplete_var (tree var
)
13690 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
13692 /* Keep track of variables with incomplete types. */
13693 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
13694 && DECL_EXTERNAL (var
))
13696 tree inner_type
= TREE_TYPE (var
);
13698 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
13699 inner_type
= TREE_TYPE (inner_type
);
13700 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
13702 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
13703 /* RTTI TD entries are created while defining the type_info. */
13704 || (TYPE_LANG_SPECIFIC (inner_type
)
13705 && TYPE_BEING_DEFINED (inner_type
)))
13708 = VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, NULL
);
13710 iv
->incomplete_type
= inner_type
;
13715 /* Called when a class type (given by TYPE) is defined. If there are
13716 any existing VAR_DECLs whose type has been completed by this
13717 declaration, update them now. */
13720 complete_vars (tree type
)
13723 incomplete_var
*iv
;
13725 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
13727 if (same_type_p (type
, iv
->incomplete_type
))
13729 tree var
= iv
->decl
;
13730 tree type
= TREE_TYPE (var
);
13731 /* Complete the type of the variable. The VAR_DECL itself
13732 will be laid out in expand_expr. */
13733 complete_type (type
);
13734 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
13735 /* Remove this entry from the list. */
13736 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
13742 /* Check for pending declarations which may have abstract type. */
13743 complete_type_check_abstract (type
);
13746 /* If DECL is of a type which needs a cleanup, build and return an
13747 expression to perform that cleanup here. Return NULL_TREE if no
13748 cleanup need be done. */
13751 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
13757 /* Assume no cleanup is required. */
13758 cleanup
= NULL_TREE
;
13760 if (error_operand_p (decl
))
13763 /* Handle "__attribute__((cleanup))". We run the cleanup function
13764 before the destructor since the destructor is what actually
13765 terminates the lifetime of the object. */
13766 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
13773 /* Get the name specified by the user for the cleanup function. */
13774 id
= TREE_VALUE (TREE_VALUE (attr
));
13775 /* Look up the name to find the cleanup function to call. It is
13776 important to use lookup_name here because that is what is
13777 used in c-common.c:handle_cleanup_attribute when performing
13778 initial checks on the attribute. Note that those checks
13779 include ensuring that the function found is not an overloaded
13780 function, or an object with an overloaded call operator,
13781 etc.; we can rely on the fact that the function found is an
13782 ordinary FUNCTION_DECL. */
13783 fn
= lookup_name (id
);
13784 arg
= build_address (decl
);
13786 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
13787 if (cleanup
== error_mark_node
)
13788 return error_mark_node
;
13790 /* Handle ordinary C++ destructors. */
13791 type
= TREE_TYPE (decl
);
13792 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
13794 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
13795 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
13796 && CLASSTYPE_VBASECLASSES (type
));
13800 if (TREE_CODE (type
) == ARRAY_TYPE
)
13803 addr
= build_address (decl
);
13805 /* Optimize for space over speed here. */
13806 if (!has_vbases
|| flag_expensive_optimizations
)
13807 flags
|= LOOKUP_NONVIRTUAL
;
13809 call
= build_delete (TREE_TYPE (addr
), addr
,
13810 sfk_complete_destructor
, flags
, 0, complain
);
13811 if (call
== error_mark_node
)
13812 cleanup
= error_mark_node
;
13814 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
13819 /* build_delete sets the location of the destructor call to the
13820 current location, even though the destructor is going to be
13821 called later, at the end of the current scope. This can lead to
13822 a "jumpy" behaviour for users of debuggers when they step around
13823 the end of the block. So let's unset the location of the
13824 destructor call instead. */
13825 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
13826 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
13831 /* When a stmt has been parsed, this function is called. */
13838 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13839 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13840 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13843 static_fn_type (tree memfntype
)
13848 if (TYPE_PTRMEMFUNC_P (memfntype
))
13849 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13850 if (POINTER_TYPE_P (memfntype
)
13851 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13852 memfntype
= TREE_TYPE (memfntype
);
13853 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13855 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13856 args
= TYPE_ARG_TYPES (memfntype
);
13857 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13858 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13859 fntype
= (cp_build_type_attribute_variant
13860 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13861 fntype
= (build_exception_variant
13862 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13866 /* DECL was originally constructed as a non-static member function,
13867 but turned out to be static. Update it accordingly. */
13870 revert_static_member_fn (tree decl
)
13872 tree stype
= static_fn_type (decl
);
13873 cp_cv_quals quals
= type_memfn_quals (stype
);
13875 if (quals
!= TYPE_UNQUALIFIED
)
13876 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
13878 TREE_TYPE (decl
) = stype
;
13880 if (DECL_ARGUMENTS (decl
))
13881 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
13882 DECL_STATIC_FUNCTION_P (decl
) = 1;
13885 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13886 one of the language-independent trees. */
13888 enum cp_tree_node_structure_enum
13889 cp_tree_node_structure (union lang_tree_node
* t
)
13891 switch (TREE_CODE (&t
->generic
))
13893 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13894 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
13895 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13896 case OVERLOAD
: return TS_CP_OVERLOAD
;
13897 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13898 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13899 case BASELINK
: return TS_CP_BASELINK
;
13900 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13901 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13902 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13903 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13904 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13905 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
13906 default: return TS_CP_GENERIC
;
13910 /* Build the void_list_node (void_type_node having been created). */
13912 build_void_list_node (void)
13914 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13919 cp_missing_noreturn_ok_p (tree decl
)
13921 /* A missing noreturn is ok for the `main' function. */
13922 return DECL_MAIN_P (decl
);
13925 /* Return the COMDAT group into which DECL should be placed. */
13928 cxx_comdat_group (tree decl
)
13932 /* Virtual tables, construction virtual tables, and virtual table
13933 tables all go in a single COMDAT group, named after the primary
13935 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13936 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
13937 /* For all other DECLs, the COMDAT group is the mangled name of the
13938 declaration itself. */
13941 while (DECL_THUNK_P (decl
))
13943 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13944 into the same section as the target function. In that case
13945 we must return target's name. */
13946 tree target
= THUNK_TARGET (decl
);
13947 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
13948 && DECL_SECTION_NAME (target
) != NULL
13949 && DECL_ONE_ONLY (target
))
13954 name
= DECL_ASSEMBLER_NAME (decl
);
13960 #include "gt-cp-decl.h"