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 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
2951 ret
= define_label_1 (location
, name
);
2952 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
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 if (declspecs
->attributes
&& warn_attributes
)
4222 if (!CLASS_TYPE_P (declared_type
)
4223 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4224 /* For a non-template class, use the name location. */
4225 loc
= location_of (declared_type
);
4227 /* For a template class (an explicit instantiation), use the
4228 current location. */
4229 loc
= input_location
;
4230 warning_at (loc
, OPT_Wattributes
, "attribute ignored in declaration "
4231 "of %q#T", declared_type
);
4232 inform (loc
, "attribute for %q#T must follow the %qs keyword",
4233 declared_type
, class_key_or_enum_as_string (declared_type
));
4236 return declared_type
;
4239 /* Called when a declaration is seen that contains no names to declare.
4240 If its type is a reference to a structure, union or enum inherited
4241 from a containing scope, shadow that tag name for the current scope
4242 with a forward reference.
4243 If its type defines a new named structure or union
4244 or defines an enum, it is valid but we need not do anything here.
4245 Otherwise, it is an error.
4247 C++: may have to grok the declspecs to learn about static,
4248 complain for anonymous unions.
4250 Returns the TYPE declared -- or NULL_TREE if none. */
4253 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4255 tree t
= check_tag_decl (declspecs
);
4260 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4263 /* This is where the variables in an anonymous union are
4264 declared. An anonymous union declaration looks like:
4266 because there is no declarator after the union, the parser
4267 sends that declaration here. */
4268 if (ANON_AGGR_TYPE_P (t
))
4270 fixup_anonymous_aggr (t
);
4272 if (TYPE_FIELDS (t
))
4274 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4275 declspecs
, NORMAL
, 0, NULL
);
4276 finish_anon_union (decl
);
4283 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4286 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4287 const cp_declarator
*declarator
,
4288 bool is_template_arg
)
4292 enum decl_context context
4293 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4294 attrs
= type_specifiers
->attributes
;
4295 type_specifiers
->attributes
= NULL_TREE
;
4296 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4297 if (attrs
&& type
!= error_mark_node
)
4299 if (CLASS_TYPE_P (type
))
4300 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4301 "outside of definition", type
);
4302 else if (MAYBE_CLASS_TYPE_P (type
))
4303 /* A template type parameter or other dependent type. */
4304 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4305 "type %qT without an associated declaration", type
);
4307 cplus_decl_attributes (&type
, attrs
, 0);
4312 /* Process a DECLARATOR for a function-scope variable declaration,
4313 namespace-scope variable declaration, or function declaration.
4314 (Function definitions go through start_function; class member
4315 declarations appearing in the body of the class go through
4316 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4317 If an error occurs, the error_mark_node is returned instead.
4319 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4320 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4321 for an explicitly defaulted function, or SD_DELETED for an explicitly
4322 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4323 implicitly initialized via a default constructor. ATTRIBUTES and
4324 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4326 The scope represented by the context of the returned DECL is pushed
4327 (if it is not the global namespace) and is assigned to
4328 *PUSHED_SCOPE_P. The caller is then responsible for calling
4329 pop_scope on *PUSHED_SCOPE_P if it is set. */
4332 start_decl (const cp_declarator
*declarator
,
4333 cp_decl_specifier_seq
*declspecs
,
4336 tree prefix_attributes
,
4337 tree
*pushed_scope_p
)
4345 *pushed_scope_p
= NULL_TREE
;
4347 /* An object declared as __attribute__((deprecated)) suppresses
4348 warnings of uses of other deprecated items. */
4349 if (lookup_attribute ("deprecated", attributes
))
4350 deprecated_state
= DEPRECATED_SUPPRESS
;
4352 attributes
= chainon (attributes
, prefix_attributes
);
4354 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4357 deprecated_state
= DEPRECATED_NORMAL
;
4359 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4360 || decl
== error_mark_node
)
4361 return error_mark_node
;
4363 context
= CP_DECL_CONTEXT (decl
);
4364 if (context
!= global_namespace
)
4365 *pushed_scope_p
= push_scope (context
);
4368 /* Is it valid for this decl to have an initializer at all?
4369 If not, set INITIALIZED to zero, which will indirectly
4370 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4371 switch (TREE_CODE (decl
))
4374 error ("typedef %qD is initialized (use decltype instead)", decl
);
4375 return error_mark_node
;
4378 if (initialized
== SD_DELETED
)
4379 /* We'll handle the rest of the semantics later, but we need to
4380 set this now so it's visible to duplicate_decls. */
4381 DECL_DELETED_FN (decl
) = 1;
4390 if (! toplevel_bindings_p ()
4391 && DECL_EXTERNAL (decl
))
4392 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4394 DECL_EXTERNAL (decl
) = 0;
4395 if (toplevel_bindings_p ())
4396 TREE_STATIC (decl
) = 1;
4398 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4400 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4401 record_key_method_defined (decl
);
4403 /* If this is a typedef that names the class for linkage purposes
4404 (7.1.3p8), apply any attributes directly to the type. */
4405 if (TREE_CODE (decl
) == TYPE_DECL
4406 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4407 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4408 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4412 /* Set attributes here so if duplicate decl, will have proper attributes. */
4413 cplus_decl_attributes (&decl
, attributes
, flags
);
4415 /* Dllimported symbols cannot be defined. Static data members (which
4416 can be initialized in-class and dllimported) go through grokfield,
4417 not here, so we don't need to exclude those decls when checking for
4419 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4421 error ("definition of %q#D is marked %<dllimport%>", decl
);
4422 DECL_DLLIMPORT_P (decl
) = 0;
4425 /* If #pragma weak was used, mark the decl weak now. */
4426 maybe_apply_pragma_weak (decl
);
4428 if (TREE_CODE (decl
) == FUNCTION_DECL
4429 && DECL_DECLARED_INLINE_P (decl
)
4430 && DECL_UNINLINABLE (decl
)
4431 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4432 warning (0, "inline function %q+D given attribute noinline", decl
);
4434 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4436 if (TREE_CODE (decl
) == VAR_DECL
)
4438 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4439 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4440 error ("%q#D is not a static member of %q#T", decl
, context
);
4443 if (DECL_CONTEXT (field
) != context
)
4445 if (!same_type_p (DECL_CONTEXT (field
), context
))
4446 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4447 "to be defined as %<%T::%D%>",
4448 DECL_CONTEXT (field
), DECL_NAME (decl
),
4449 context
, DECL_NAME (decl
));
4450 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4452 if (processing_specialization
4453 && template_class_depth (context
) == 0
4454 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4455 error ("template header not allowed in member definition "
4456 "of explicitly specialized class");
4457 /* Static data member are tricky; an in-class initialization
4458 still doesn't provide a definition, so the in-class
4459 declaration will have DECL_EXTERNAL set, but will have an
4460 initialization. Thus, duplicate_decls won't warn
4461 about this situation, and so we check here. */
4462 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4463 error ("duplicate initialization of %qD", decl
);
4464 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4466 if (declspecs
->specs
[(int) ds_constexpr
]
4467 && !DECL_DECLARED_CONSTEXPR_P (field
))
4468 error ("%qD declared %<constexpr%> outside its class", field
);
4473 tree field
= check_classfn (context
, decl
,
4474 (processing_template_decl
4475 > template_class_depth (context
))
4476 ? current_template_parms
4478 if (field
&& field
!= error_mark_node
4479 && duplicate_decls (decl
, field
,
4480 /*newdecl_is_friend=*/false))
4484 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4485 DECL_IN_AGGR_P (decl
) = 0;
4486 /* Do not mark DECL as an explicit specialization if it was not
4487 already marked as an instantiation; a declaration should
4488 never be marked as a specialization unless we know what
4489 template is being specialized. */
4490 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4492 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4494 /* [temp.expl.spec] An explicit specialization of a static data
4495 member of a template is a definition if the declaration
4496 includes an initializer; otherwise, it is a declaration.
4498 We check for processing_specialization so this only applies
4499 to the new specialization syntax. */
4500 if (!initialized
&& processing_specialization
)
4501 DECL_EXTERNAL (decl
) = 1;
4504 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4505 /* Aliases are definitions. */
4507 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4511 was_public
= TREE_PUBLIC (decl
);
4513 /* Enter this declaration into the symbol table. */
4514 decl
= maybe_push_decl (decl
);
4516 if (processing_template_decl
)
4517 decl
= push_template_decl (decl
);
4518 if (decl
== error_mark_node
)
4519 return error_mark_node
;
4521 /* Tell the back end to use or not use .common as appropriate. If we say
4522 -fconserve-space, we want this to save .data space, at the expense of
4523 wrong semantics. If we say -fno-conserve-space, we want this to
4524 produce errors about redefs; to do this we force variables into the
4526 if (flag_conserve_space
4527 && TREE_CODE (decl
) == VAR_DECL
4528 && TREE_PUBLIC (decl
)
4529 && !DECL_THREAD_LOCAL_P (decl
)
4530 && !have_global_bss_p ())
4531 DECL_COMMON (decl
) = 1;
4533 if (TREE_CODE (decl
) == VAR_DECL
4534 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4535 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4537 /* This is a const variable with implicit 'static'. Set
4538 DECL_THIS_STATIC so we can tell it from variables that are
4539 !TREE_PUBLIC because of the anonymous namespace. */
4540 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4541 DECL_THIS_STATIC (decl
) = 1;
4544 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4545 start_decl_1 (decl
, initialized
);
4550 /* Process the declaration of a variable DECL. INITIALIZED is true
4551 iff DECL is explicitly initialized. (INITIALIZED is false if the
4552 variable is initialized via an implicitly-called constructor.)
4553 This function must be called for ordinary variables (including, for
4554 example, implicit instantiations of templates), but must not be
4555 called for template declarations. */
4558 start_decl_1 (tree decl
, bool initialized
)
4562 bool aggregate_definition_p
;
4564 gcc_assert (!processing_template_decl
);
4566 if (error_operand_p (decl
))
4569 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4571 type
= TREE_TYPE (decl
);
4572 complete_p
= COMPLETE_TYPE_P (type
);
4573 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4575 /* If an explicit initializer is present, or if this is a definition
4576 of an aggregate, then we need a complete type at this point.
4577 (Scalars are always complete types, so there is nothing to
4578 check.) This code just sets COMPLETE_P; errors (if necessary)
4579 are issued below. */
4580 if ((initialized
|| aggregate_definition_p
)
4582 && COMPLETE_TYPE_P (complete_type (type
)))
4585 /* We will not yet have set TREE_READONLY on DECL if the type
4586 was "const", but incomplete, before this point. But, now, we
4587 have a complete type, so we can try again. */
4588 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4592 /* Is it valid for this decl to have an initializer at all? */
4594 /* Don't allow initializations for incomplete types except for
4595 arrays which might be completed by the initialization. */
4597 ; /* A complete type is ok. */
4598 else if (type_uses_auto (type
))
4599 ; /* An auto type is ok. */
4600 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4602 error ("variable %q#D has initializer but incomplete type", decl
);
4603 type
= TREE_TYPE (decl
) = error_mark_node
;
4605 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4607 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4608 error ("elements of array %q#D have incomplete type", decl
);
4609 /* else we already gave an error in start_decl. */
4612 else if (aggregate_definition_p
&& !complete_p
)
4614 if (type_uses_auto (type
))
4615 error ("declaration of %q#D has no initializer", decl
);
4617 error ("aggregate %q#D has incomplete type and cannot be defined",
4619 /* Change the type so that assemble_variable will give
4620 DECL an rtl we can live with: (mem (const_int 0)). */
4621 type
= TREE_TYPE (decl
) = error_mark_node
;
4624 /* Create a new scope to hold this declaration if necessary.
4625 Whether or not a new scope is necessary cannot be determined
4626 until after the type has been completed; if the type is a
4627 specialization of a class template it is not until after
4628 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4629 will be set correctly. */
4630 maybe_push_cleanup_level (type
);
4633 /* Handle initialization of references. DECL, TYPE, and INIT have the
4634 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4635 but will be set to a new CLEANUP_STMT if a temporary is created
4636 that must be destroyed subsequently.
4638 Returns an initializer expression to use to initialize DECL, or
4639 NULL if the initialization can be performed statically.
4641 Quotes on semantics can be found in ARM 8.4.3. */
4644 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4646 if (init
== NULL_TREE
)
4648 if ((DECL_LANG_SPECIFIC (decl
) == 0
4649 || DECL_IN_AGGR_P (decl
) == 0)
4650 && ! DECL_THIS_EXTERN (decl
))
4651 error ("%qD declared as reference but not initialized", decl
);
4655 if (TREE_CODE (init
) == TREE_LIST
)
4656 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4657 tf_warning_or_error
);
4659 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4660 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4661 /* Note: default conversion is only called in very special cases. */
4662 init
= decay_conversion (init
);
4664 /* Convert INIT to the reference type TYPE. This may involve the
4665 creation of a temporary, whose lifetime must be the same as that
4666 of the reference. If so, a DECL_EXPR for the temporary will be
4667 added just after the DECL_EXPR for DECL. That's why we don't set
4668 DECL_INITIAL for local references (instead assigning to them
4669 explicitly); we need to allow the temporary to be initialized
4671 return initialize_reference (type
, init
, flags
,
4672 tf_warning_or_error
);
4675 /* Designated initializers in arrays are not supported in GNU C++.
4676 The parser cannot detect this error since it does not know whether
4677 a given brace-enclosed initializer is for a class type or for an
4678 array. This function checks that CE does not use a designated
4679 initializer. If it does, an error is issued. Returns true if CE
4680 is valid, i.e., does not have a designated initializer. */
4683 check_array_designated_initializer (const constructor_elt
*ce
,
4684 unsigned HOST_WIDE_INT index
)
4686 /* Designated initializers for array elements are not supported. */
4689 /* The parser only allows identifiers as designated
4691 if (ce
->index
== error_mark_node
)
4692 error ("name used in a GNU-style designated "
4693 "initializer for an array");
4694 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4696 /* A C99 designator is OK if it matches the current index. */
4697 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4700 sorry ("non-trivial designated initializers not supported");
4704 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4705 error ("name %qD used in a GNU-style designated "
4706 "initializer for an array", ce
->index
);
4714 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4715 array until we finish parsing the initializer. If that's the
4716 situation we're in, update DECL accordingly. */
4719 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4721 tree type
= TREE_TYPE (decl
);
4723 if (TREE_CODE (type
) == ARRAY_TYPE
4724 && TYPE_DOMAIN (type
) == NULL_TREE
4725 && TREE_CODE (decl
) != TYPE_DECL
)
4727 /* do_default is really a C-ism to deal with tentative definitions.
4728 But let's leave it here to ease the eventual merge. */
4729 int do_default
= !DECL_EXTERNAL (decl
);
4730 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4733 /* Check that there are no designated initializers in INIT, as
4734 those are not supported in GNU C++, and as the middle-end
4735 will crash if presented with a non-numeric designated
4737 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4739 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4740 constructor_elt
*ce
;
4742 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4743 if (!check_array_designated_initializer (ce
, i
))
4749 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4753 error ("initializer fails to determine size of %qD", decl
);
4754 TREE_TYPE (decl
) = error_mark_node
;
4756 else if (failure
== 2)
4760 error ("array size missing in %qD", decl
);
4761 TREE_TYPE (decl
) = error_mark_node
;
4763 /* If a `static' var's size isn't known, make it extern as
4764 well as static, so it does not get allocated. If it's not
4765 `static', then don't mark it extern; finish_incomplete_decl
4766 will give it a default size and it will get allocated. */
4767 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4768 DECL_EXTERNAL (decl
) = 1;
4770 else if (failure
== 3)
4772 error ("zero-size array %qD", decl
);
4773 TREE_TYPE (decl
) = error_mark_node
;
4777 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4779 relayout_decl (decl
);
4783 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4784 any appropriate error messages regarding the layout. */
4787 layout_var_decl (tree decl
)
4791 type
= TREE_TYPE (decl
);
4792 if (type
== error_mark_node
)
4795 /* If we haven't already layed out this declaration, do so now.
4796 Note that we must not call complete type for an external object
4797 because it's type might involve templates that we are not
4798 supposed to instantiate yet. (And it's perfectly valid to say
4799 `extern X x' for some incomplete type `X'.) */
4800 if (!DECL_EXTERNAL (decl
))
4801 complete_type (type
);
4802 if (!DECL_SIZE (decl
)
4803 && TREE_TYPE (decl
) != error_mark_node
4804 && (COMPLETE_TYPE_P (type
)
4805 || (TREE_CODE (type
) == ARRAY_TYPE
4806 && !TYPE_DOMAIN (type
)
4807 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4808 layout_decl (decl
, 0);
4810 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4812 /* An automatic variable with an incomplete type: that is an error.
4813 Don't talk about array types here, since we took care of that
4814 message in grokdeclarator. */
4815 error ("storage size of %qD isn%'t known", decl
);
4816 TREE_TYPE (decl
) = error_mark_node
;
4819 /* Keep this code around in case we later want to control debug info
4820 based on whether a type is "used". (jason 1999-11-11) */
4822 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4823 /* Let debugger know it should output info for this type. */
4824 note_debug_info_needed (ttype
);
4826 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4827 note_debug_info_needed (DECL_CONTEXT (decl
));
4830 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4831 && DECL_SIZE (decl
) != NULL_TREE
4832 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4834 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4835 constant_expression_warning (DECL_SIZE (decl
));
4838 error ("storage size of %qD isn%'t constant", decl
);
4839 TREE_TYPE (decl
) = error_mark_node
;
4844 /* If a local static variable is declared in an inline function, or if
4845 we have a weak definition, we must endeavor to create only one
4846 instance of the variable at link-time. */
4849 maybe_commonize_var (tree decl
)
4851 /* Static data in a function with comdat linkage also has comdat
4853 if (TREE_STATIC (decl
)
4854 /* Don't mess with __FUNCTION__. */
4855 && ! DECL_ARTIFICIAL (decl
)
4856 && DECL_FUNCTION_SCOPE_P (decl
)
4857 && vague_linkage_p (DECL_CONTEXT (decl
)))
4861 /* With weak symbols, we simply make the variable COMDAT;
4862 that will cause copies in multiple translations units to
4864 comdat_linkage (decl
);
4868 if (DECL_INITIAL (decl
) == NULL_TREE
4869 || DECL_INITIAL (decl
) == error_mark_node
)
4871 /* Without weak symbols, we can use COMMON to merge
4872 uninitialized variables. */
4873 TREE_PUBLIC (decl
) = 1;
4874 DECL_COMMON (decl
) = 1;
4878 /* While for initialized variables, we must use internal
4879 linkage -- which means that multiple copies will not
4881 TREE_PUBLIC (decl
) = 0;
4882 DECL_COMMON (decl
) = 0;
4883 warning_at (input_location
, 0,
4884 "sorry: semantics of inline function static "
4885 "data %q+#D are wrong (you%'ll wind up "
4886 "with multiple copies)", decl
);
4887 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4888 " you can work around this by removing "
4893 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4894 /* Set it up again; we might have set DECL_INITIAL since the last
4896 comdat_linkage (decl
);
4899 /* Issue an error message if DECL is an uninitialized const variable. */
4902 check_for_uninitialized_const_var (tree decl
)
4904 tree type
= strip_array_types (TREE_TYPE (decl
));
4906 /* ``Unless explicitly declared extern, a const object does not have
4907 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4909 if (TREE_CODE (decl
) == VAR_DECL
4910 && TREE_CODE (type
) != REFERENCE_TYPE
4911 && CP_TYPE_CONST_P (type
)
4912 && !DECL_INITIAL (decl
))
4914 tree field
= default_init_uninitialized_part (type
);
4918 permerror (DECL_SOURCE_LOCATION (decl
),
4919 "uninitialized const %qD", decl
);
4921 if (CLASS_TYPE_P (type
))
4923 tree defaulted_ctor
;
4925 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4926 "%q#T has no user-provided default constructor", type
);
4927 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4929 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4930 "constructor is not user-provided because it is "
4931 "explicitly defaulted in the class body");
4932 inform (0, "and the implicitly-defined constructor does not "
4933 "initialize %q+#D", field
);
4938 /* Structure holding the current initializer being processed by reshape_init.
4939 CUR is a pointer to the current element being processed, END is a pointer
4940 after the last element present in the initializer. */
4941 typedef struct reshape_iterator_t
4943 constructor_elt
*cur
;
4944 constructor_elt
*end
;
4947 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
4949 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4950 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4951 initialized. If there are no more such fields, the return value
4955 next_initializable_field (tree field
)
4958 && (TREE_CODE (field
) != FIELD_DECL
4959 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4960 || DECL_ARTIFICIAL (field
)))
4961 field
= DECL_CHAIN (field
);
4966 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4967 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4968 INTEGER_CST representing the size of the array minus one (the maximum index),
4969 or NULL_TREE if the array was declared without specifying the size. D is
4970 the iterator within the constructor. */
4973 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
4974 tsubst_flags_t complain
)
4977 bool sized_array_p
= (max_index
!= NULL_TREE
);
4978 unsigned HOST_WIDE_INT max_index_cst
= 0;
4979 unsigned HOST_WIDE_INT index
;
4981 /* The initializer for an array is always a CONSTRUCTOR. */
4982 new_init
= build_constructor (init_list_type_node
, NULL
);
4986 /* Minus 1 is used for zero sized arrays. */
4987 if (integer_all_onesp (max_index
))
4990 if (host_integerp (max_index
, 1))
4991 max_index_cst
= tree_low_cst (max_index
, 1);
4992 /* sizetype is sign extended, not zero extended. */
4994 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4998 /* Loop until there are no more initializers. */
5000 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5005 check_array_designated_initializer (d
->cur
, index
);
5006 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5008 if (elt_init
== error_mark_node
)
5009 return error_mark_node
;
5010 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5011 size_int (index
), elt_init
);
5012 if (!TREE_CONSTANT (elt_init
))
5013 TREE_CONSTANT (new_init
) = false;
5019 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5020 Parameters are the same of reshape_init_r. */
5023 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5025 tree max_index
= NULL_TREE
;
5027 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5029 if (TYPE_DOMAIN (type
))
5030 max_index
= array_type_nelts (type
);
5032 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5035 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5036 Parameters are the same of reshape_init_r. */
5039 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5041 tree max_index
= NULL_TREE
;
5043 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5045 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5047 tree value
= d
->cur
->value
;
5048 if (!same_type_p (TREE_TYPE (value
), type
))
5050 if (complain
& tf_error
)
5051 error ("invalid type %qT as initializer for a vector of type %qT",
5052 TREE_TYPE (d
->cur
->value
), type
);
5053 value
= error_mark_node
;
5059 /* For a vector, we initialize it as an array of the appropriate size. */
5060 if (TREE_CODE (type
) == VECTOR_TYPE
)
5061 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5063 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5066 /* Subroutine of reshape_init_r, processes the initializers for classes
5067 or union. Parameters are the same of reshape_init_r. */
5070 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5071 tsubst_flags_t complain
)
5076 gcc_assert (CLASS_TYPE_P (type
));
5078 /* The initializer for a class is always a CONSTRUCTOR. */
5079 new_init
= build_constructor (init_list_type_node
, NULL
);
5080 field
= next_initializable_field (TYPE_FIELDS (type
));
5086 An initializer for an aggregate member that is an
5087 empty class shall have the form of an empty
5088 initializer-list {}. */
5089 if (!first_initializer_p
)
5091 if (complain
& tf_error
)
5092 error ("initializer for %qT must be brace-enclosed", type
);
5093 return error_mark_node
;
5098 /* Loop through the initializable fields, gathering initializers. */
5099 while (d
->cur
!= d
->end
)
5103 /* Handle designated initializers, as an extension. */
5106 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5108 if (complain
& tf_error
)
5109 error ("%<[%E] =%> used in a GNU-style designated initializer"
5110 " for class %qT", d
->cur
->index
, type
);
5111 return error_mark_node
;
5114 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5115 /* We already reshaped this. */
5116 gcc_assert (d
->cur
->index
== field
);
5118 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5120 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5122 if (complain
& tf_error
)
5123 error ("%qT has no non-static data member named %qD", type
,
5125 return error_mark_node
;
5129 /* If we processed all the member of the class, we are done. */
5133 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5134 /*first_initializer_p=*/false, complain
);
5135 if (field_init
== error_mark_node
)
5136 return error_mark_node
;
5138 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5142 When a union is initialized with a brace-enclosed
5143 initializer, the braces shall only contain an
5144 initializer for the first member of the union. */
5145 if (TREE_CODE (type
) == UNION_TYPE
)
5148 field
= next_initializable_field (DECL_CHAIN (field
));
5154 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5155 designators are not valid; either complain or return true to indicate
5156 that reshape_init_r should return error_mark_node. */
5159 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5163 if (complain
& tf_error
)
5164 error ("C99 designator %qE outside aggregate initializer",
5172 /* Subroutine of reshape_init, which processes a single initializer (part of
5173 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5174 iterator within the CONSTRUCTOR which points to the initializer to process.
5175 FIRST_INITIALIZER_P is true if this is the first initializer of the
5176 outermost CONSTRUCTOR node. */
5179 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5180 tsubst_flags_t complain
)
5182 tree init
= d
->cur
->value
;
5184 if (error_operand_p (init
))
5185 return error_mark_node
;
5187 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5188 && has_designator_problem (d
, complain
))
5189 return error_mark_node
;
5191 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5193 /* A complex type can be initialized from one or two initializers,
5194 but braces are not elided. */
5196 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5198 if (CONSTRUCTOR_NELTS (init
) > 2)
5200 if (complain
& tf_error
)
5201 error ("too many initializers for %qT", type
);
5203 return error_mark_node
;
5206 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5208 VEC(constructor_elt
, gc
) *v
= 0;
5209 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5210 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5211 if (has_designator_problem (d
, complain
))
5212 return error_mark_node
;
5214 init
= build_constructor (init_list_type_node
, v
);
5219 /* A non-aggregate type is always initialized with a single
5221 if (!CP_AGGREGATE_TYPE_P (type
))
5223 /* It is invalid to initialize a non-aggregate type with a
5224 brace-enclosed initializer before C++0x.
5225 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5226 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5227 a CONSTRUCTOR (with a record type). */
5228 if (TREE_CODE (init
) == CONSTRUCTOR
5229 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5231 if (SCALAR_TYPE_P (type
))
5233 if (complain
& tf_error
)
5234 error ("braces around scalar initializer for type %qT", type
);
5235 init
= error_mark_node
;
5238 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5247 All implicit type conversions (clause _conv_) are considered when
5248 initializing the aggregate member with an initializer from an
5249 initializer-list. If the initializer can initialize a member,
5250 the member is initialized. Otherwise, if the member is itself a
5251 non-empty subaggregate, brace elision is assumed and the
5252 initializer is considered for the initialization of the first
5253 member of the subaggregate. */
5254 if (TREE_CODE (init
) != CONSTRUCTOR
5255 /* But don't try this for the first initializer, since that would be
5256 looking through the outermost braces; A a2 = { a1 }; is not a
5257 valid aggregate initialization. */
5258 && !first_initializer_p
5259 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5260 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5266 /* [dcl.init.string]
5268 A char array (whether plain char, signed char, or unsigned char)
5269 can be initialized by a string-literal (optionally enclosed in
5270 braces); a wchar_t array can be initialized by a wide
5271 string-literal (optionally enclosed in braces). */
5272 if (TREE_CODE (type
) == ARRAY_TYPE
5273 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5275 tree str_init
= init
;
5277 /* Strip one level of braces if and only if they enclose a single
5278 element (as allowed by [dcl.init.string]). */
5279 if (!first_initializer_p
5280 && TREE_CODE (str_init
) == CONSTRUCTOR
5281 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5283 str_init
= VEC_index (constructor_elt
,
5284 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5287 /* If it's a string literal, then it's the initializer for the array
5288 as a whole. Otherwise, continue with normal initialization for
5289 array types (one value per array element). */
5290 if (TREE_CODE (str_init
) == STRING_CST
)
5292 if (has_designator_problem (d
, complain
))
5293 return error_mark_node
;
5299 /* The following cases are about aggregates. If we are not within a full
5300 initializer already, and there is not a CONSTRUCTOR, it means that there
5301 is a missing set of braces (that is, we are processing the case for
5302 which reshape_init exists). */
5303 if (!first_initializer_p
)
5305 if (TREE_CODE (init
) == CONSTRUCTOR
)
5307 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5308 /* There is no need to reshape pointer-to-member function
5309 initializers, as they are always constructed correctly
5310 by the front end. */
5312 else if (COMPOUND_LITERAL_P (init
))
5313 /* For a nested compound literal, there is no need to reshape since
5314 brace elision is not allowed. Even if we decided to allow it,
5315 we should add a call to reshape_init in finish_compound_literal,
5316 before calling digest_init, so changing this code would still
5317 not be necessary. */
5318 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5322 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5323 return reshape_init (type
, init
, complain
);
5327 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5331 /* Dispatch to specialized routines. */
5332 if (CLASS_TYPE_P (type
))
5333 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5334 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5335 return reshape_init_array (type
, d
, complain
);
5336 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5337 return reshape_init_vector (type
, d
, complain
);
5342 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5343 brace-enclosed aggregate initializer.
5345 INIT is the CONSTRUCTOR containing the list of initializers describing
5346 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5347 It may not presently match the shape of the TYPE; for example:
5349 struct S { int a; int b; };
5350 struct S a[] = { 1, 2, 3, 4 };
5352 Here INIT will hold a VEC of four elements, rather than a
5353 VEC of two elements, each itself a VEC of two elements. This
5354 routine transforms INIT from the former form into the latter. The
5355 revised CONSTRUCTOR node is returned. */
5358 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5360 VEC(constructor_elt
, gc
) *v
;
5364 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5366 v
= CONSTRUCTOR_ELTS (init
);
5368 /* An empty constructor does not need reshaping, and it is always a valid
5370 if (VEC_empty (constructor_elt
, v
))
5373 /* Recurse on this CONSTRUCTOR. */
5374 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5375 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5377 new_init
= reshape_init_r (type
, &d
, true, complain
);
5378 if (new_init
== error_mark_node
)
5379 return error_mark_node
;
5381 /* Make sure all the element of the constructor were used. Otherwise,
5382 issue an error about exceeding initializers. */
5385 if (complain
& tf_error
)
5386 error ("too many initializers for %qT", type
);
5388 return error_mark_node
;
5394 /* Verify array initializer. Returns true if errors have been reported. */
5397 check_array_initializer (tree decl
, tree type
, tree init
)
5399 tree element_type
= TREE_TYPE (type
);
5401 /* The array type itself need not be complete, because the
5402 initializer may tell us how many elements are in the array.
5403 But, the elements of the array must be complete. */
5404 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5407 error ("elements of array %q#D have incomplete type", decl
);
5409 error ("elements of array %q#T have incomplete type", type
);
5412 /* It is not valid to initialize a VLA. */
5414 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5415 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5418 error ("variable-sized object %qD may not be initialized", decl
);
5420 error ("variable-sized compound literal");
5426 /* Subroutine of check_initializer; args are passed down from that function.
5427 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5430 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5433 gcc_assert (stmts_are_full_exprs_p ());
5434 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5437 /* Verify INIT (the initializer for DECL), and record the
5438 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5439 grok_reference_init.
5441 If the return value is non-NULL, it is an expression that must be
5442 evaluated dynamically to initialize DECL. */
5445 check_initializer (tree decl
, tree init
, int flags
, VEC(tree
,gc
) **cleanups
)
5447 tree type
= TREE_TYPE (decl
);
5448 tree init_code
= NULL
;
5449 tree extra_init
= NULL_TREE
;
5452 /* Things that are going to be initialized need to have complete
5454 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5456 if (DECL_HAS_VALUE_EXPR_P (decl
))
5458 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5459 it doesn't have storage to be initialized. */
5460 gcc_assert (init
== NULL_TREE
);
5464 if (type
== error_mark_node
)
5465 /* We will have already complained. */
5468 if (TREE_CODE (type
) == ARRAY_TYPE
)
5470 if (check_array_initializer (decl
, type
, init
))
5473 else if (!COMPLETE_TYPE_P (type
))
5475 error ("%q#D has incomplete type", decl
);
5476 TREE_TYPE (decl
) = error_mark_node
;
5480 /* There is no way to make a variable-sized class type in GNU C++. */
5481 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5483 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5485 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5486 if (SCALAR_TYPE_P (type
))
5490 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5491 init
= build_zero_init (type
, NULL_TREE
, false);
5493 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5495 error ("scalar object %qD requires one element in initializer",
5497 TREE_TYPE (decl
) = error_mark_node
;
5503 if (TREE_CODE (decl
) == CONST_DECL
)
5505 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5507 DECL_INITIAL (decl
) = init
;
5509 gcc_assert (init
!= NULL_TREE
);
5512 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5514 else if (init
|| type_build_ctor_call (type
)
5515 || TREE_CODE (type
) == REFERENCE_TYPE
)
5517 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5519 init
= grok_reference_init (decl
, type
, init
, flags
);
5520 flags
|= LOOKUP_ALREADY_DIGESTED
;
5523 check_for_uninitialized_const_var (decl
);
5524 /* Do not reshape constructors of vectors (they don't need to be
5526 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5528 if (is_std_init_list (type
))
5530 init
= perform_implicit_conversion (type
, init
,
5531 tf_warning_or_error
);
5532 flags
|= LOOKUP_ALREADY_DIGESTED
;
5534 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5536 /* Don't reshape if the class has constructors. */
5537 if (cxx_dialect
== cxx98
)
5538 error ("in C++98 %qD must be initialized by constructor, "
5542 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5544 error ("opaque vector types cannot be initialized");
5545 init
= error_mark_node
;
5549 init
= reshape_init (type
, init
, tf_warning_or_error
);
5550 if (SCALAR_TYPE_P (type
))
5551 check_narrowing (type
, init
);
5555 /* If DECL has an array type without a specific bound, deduce the
5556 array size from the initializer. */
5557 maybe_deduce_size_from_array_init (decl
, init
);
5558 type
= TREE_TYPE (decl
);
5559 if (type
== error_mark_node
)
5562 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5563 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5564 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5565 && CP_AGGREGATE_TYPE_P (type
)))
5567 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5569 /* If this is a constexpr initializer, expand_default_init will
5570 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5571 case, pull the initializer back out and pass it down into
5572 store_init_value. */
5573 while (TREE_CODE (init_code
) == EXPR_STMT
5574 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5575 init_code
= TREE_OPERAND (init_code
, 0);
5576 if (TREE_CODE (init_code
) == INIT_EXPR
)
5578 init
= TREE_OPERAND (init_code
, 1);
5579 init_code
= NULL_TREE
;
5580 /* Don't call digest_init; it's unnecessary and will complain
5581 about aggregate initialization of non-aggregate classes. */
5582 flags
|= LOOKUP_ALREADY_DIGESTED
;
5584 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5586 /* Declared constexpr, but no suitable initializer; massage
5587 init appropriately so we can pass it into store_init_value
5589 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5590 init
= finish_compound_literal (type
, init
,
5591 tf_warning_or_error
);
5592 else if (CLASS_TYPE_P (type
)
5593 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5595 init
= build_functional_cast (type
, init
, tf_none
);
5596 if (init
!= error_mark_node
)
5597 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5599 init_code
= NULL_TREE
;
5605 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5607 /* In aggregate initialization of a variable, each element
5608 initialization is a full-expression because there is no
5609 enclosing expression. */
5610 gcc_assert (stmts_are_full_exprs_p ());
5612 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5614 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5615 && DECL_INITIAL (decl
)
5616 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5617 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5618 warning (0, "array %qD initialized by parenthesized string literal %qE",
5619 decl
, DECL_INITIAL (decl
));
5625 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5626 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5627 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5628 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5631 check_for_uninitialized_const_var (decl
);
5634 if (init
&& init
!= error_mark_node
)
5635 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5638 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5640 if (init_code
&& DECL_IN_AGGR_P (decl
))
5642 static int explained
= 0;
5644 if (cxx_dialect
< cxx0x
)
5645 error ("initializer invalid for static member with constructor");
5647 error ("non-constant in-class initialization invalid for static "
5648 "member %qD", decl
);
5651 error ("(an out of class initialization is required)");
5659 /* If DECL is not a local variable, give it RTL. */
5662 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5664 int toplev
= toplevel_bindings_p ();
5666 const char *filename
;
5668 /* Set the DECL_ASSEMBLER_NAME for the object. */
5671 /* The `register' keyword, when used together with an
5672 asm-specification, indicates that the variable should be
5673 placed in a particular register. */
5674 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5676 set_user_assembler_name (decl
, asmspec
);
5677 DECL_HARD_REGISTER (decl
) = 1;
5681 if (TREE_CODE (decl
) == FUNCTION_DECL
5682 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5683 set_builtin_user_assembler_name (decl
, asmspec
);
5684 set_user_assembler_name (decl
, asmspec
);
5688 /* Handle non-variables up front. */
5689 if (TREE_CODE (decl
) != VAR_DECL
)
5691 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5695 /* If we see a class member here, it should be a static data
5697 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5699 gcc_assert (TREE_STATIC (decl
));
5700 /* An in-class declaration of a static data member should be
5701 external; it is only a declaration, and not a definition. */
5702 if (init
== NULL_TREE
)
5703 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5706 /* We don't create any RTL for local variables. */
5707 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5710 /* We defer emission of local statics until the corresponding
5711 DECL_EXPR is expanded. */
5712 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5714 /* We try to defer namespace-scope static constants so that they are
5715 not emitted into the object file unnecessarily. */
5716 filename
= input_filename
;
5717 if (!DECL_VIRTUAL_P (decl
)
5718 && TREE_READONLY (decl
)
5719 && DECL_INITIAL (decl
) != NULL_TREE
5720 && DECL_INITIAL (decl
) != error_mark_node
5722 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5724 && !TREE_PUBLIC (decl
))
5726 /* Fool with the linkage of static consts according to #pragma
5728 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5729 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5731 TREE_PUBLIC (decl
) = 1;
5732 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5737 /* Likewise for template instantiations. */
5738 else if (DECL_LANG_SPECIFIC (decl
)
5739 && DECL_IMPLICIT_INSTANTIATION (decl
))
5742 /* If we're not deferring, go ahead and assemble the variable. */
5744 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5747 /* walk_tree helper for wrap_temporary_cleanups, below. */
5750 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5752 /* Stop at types or full-expression boundaries. */
5753 if (TYPE_P (*stmt_p
)
5754 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5760 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5762 tree guard
= (tree
)data
;
5763 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5765 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5766 /* Tell honor_protect_cleanup_actions to handle this as a separate
5768 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5770 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5776 /* We're initializing a local variable which has a cleanup GUARD. If there
5777 are any temporaries used in the initializer INIT of this variable, we
5778 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5779 variable will be cleaned up properly if one of them throws.
5781 Unfortunately, there's no way to express this properly in terms of
5782 nesting, as the regions for the temporaries overlap the region for the
5783 variable itself; if there are two temporaries, the variable needs to be
5784 the first thing destroyed if either of them throws. However, we only
5785 want to run the variable's cleanup if it actually got constructed. So
5786 we need to guard the temporary cleanups with the variable's cleanup if
5787 they are run on the normal path, but not if they are run on the
5788 exceptional path. We implement this by telling
5789 honor_protect_cleanup_actions to strip the variable cleanup from the
5790 exceptional path. */
5793 wrap_temporary_cleanups (tree init
, tree guard
)
5795 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5798 /* Generate code to initialize DECL (a local variable). */
5801 initialize_local_var (tree decl
, tree init
)
5803 tree type
= TREE_TYPE (decl
);
5807 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5808 || TREE_CODE (decl
) == RESULT_DECL
);
5809 gcc_assert (!TREE_STATIC (decl
));
5811 if (DECL_SIZE (decl
) == NULL_TREE
)
5813 /* If we used it already as memory, it must stay in memory. */
5814 DECL_INITIAL (decl
) = NULL_TREE
;
5815 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5819 if (type
== error_mark_node
)
5822 /* Compute and store the initial value. */
5823 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5824 if (TREE_USED (type
))
5825 DECL_READ_P (decl
) = 1;
5827 /* Generate a cleanup, if necessary. */
5828 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5830 /* Perform the initialization. */
5833 if (TREE_CODE (init
) == INIT_EXPR
5834 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5836 /* Stick simple initializers in DECL_INITIAL so that
5837 -Wno-init-self works (c++/34772). */
5838 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5839 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5843 int saved_stmts_are_full_exprs_p
;
5845 /* If we're only initializing a single object, guard the
5846 destructors of any temporaries used in its initializer with
5847 its destructor. This isn't right for arrays because each
5848 element initialization is a full-expression. */
5849 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5850 wrap_temporary_cleanups (init
, cleanup
);
5852 gcc_assert (building_stmt_list_p ());
5853 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5854 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5855 finish_expr_stmt (init
);
5856 current_stmt_tree ()->stmts_are_full_exprs_p
=
5857 saved_stmts_are_full_exprs_p
;
5861 /* Set this to 0 so we can tell whether an aggregate which was
5862 initialized was ever used. Don't do this if it has a
5863 destructor, so we don't complain about the 'resource
5864 allocation is initialization' idiom. Now set
5865 attribute((unused)) on types so decls of that type will be
5866 marked used. (see TREE_USED, above.) */
5867 if (TYPE_NEEDS_CONSTRUCTING (type
)
5869 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5870 && DECL_NAME (decl
))
5871 TREE_USED (decl
) = 0;
5872 else if (already_used
)
5873 TREE_USED (decl
) = 1;
5876 finish_decl_cleanup (decl
, cleanup
);
5879 /* DECL is a VAR_DECL for a compiler-generated variable with static
5880 storage duration (like a virtual table) whose initializer is a
5881 compile-time constant. Initialize the variable and provide it to the
5885 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5888 gcc_assert (DECL_ARTIFICIAL (decl
));
5889 init
= build_constructor (TREE_TYPE (decl
), v
);
5890 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5891 DECL_INITIAL (decl
) = init
;
5892 DECL_INITIALIZED_P (decl
) = 1;
5893 determine_visibility (decl
);
5894 layout_var_decl (decl
);
5895 maybe_commonize_var (decl
);
5896 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5899 /* INIT is the initializer for a variable, as represented by the
5900 parser. Returns true iff INIT is type-dependent. */
5903 type_dependent_init_p (tree init
)
5905 if (TREE_CODE (init
) == TREE_LIST
)
5906 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5907 return any_type_dependent_elements_p (init
);
5908 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5909 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5911 VEC(constructor_elt
, gc
) *elts
;
5915 elts
= CONSTRUCTOR_ELTS (init
);
5916 nelts
= VEC_length (constructor_elt
, elts
);
5917 for (i
= 0; i
< nelts
; ++i
)
5918 if (type_dependent_init_p (VEC_index (constructor_elt
,
5923 /* It must be a simple expression, e.g., int i = 3; */
5924 return type_dependent_expression_p (init
);
5929 /* INIT is the initializer for a variable, as represented by the
5930 parser. Returns true iff INIT is value-dependent. */
5933 value_dependent_init_p (tree init
)
5935 if (TREE_CODE (init
) == TREE_LIST
)
5936 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5937 return any_value_dependent_elements_p (init
);
5938 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5939 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5941 VEC(constructor_elt
, gc
) *elts
;
5945 elts
= CONSTRUCTOR_ELTS (init
);
5946 nelts
= VEC_length (constructor_elt
, elts
);
5947 for (i
= 0; i
< nelts
; ++i
)
5948 if (value_dependent_init_p (VEC_index (constructor_elt
,
5953 /* It must be a simple expression, e.g., int i = 3; */
5954 return value_dependent_expression_p (init
);
5959 /* Finish processing of a declaration;
5960 install its line number and initial value.
5961 If the length of an array type is not known before,
5962 it must be determined now, from the initial value, or it is an error.
5964 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5965 true, then INIT is an integral constant expression.
5967 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5968 if the (init) syntax was used. */
5971 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5972 tree asmspec_tree
, int flags
)
5975 VEC(tree
,gc
) *cleanups
= NULL
;
5976 const char *asmspec
= NULL
;
5977 int was_readonly
= 0;
5978 bool var_definition_p
= false;
5981 if (decl
== error_mark_node
)
5986 error ("assignment (not initialization) in declaration");
5990 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5991 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5992 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5994 type
= TREE_TYPE (decl
);
5995 if (type
== error_mark_node
)
5998 /* If a name was specified, get the string. */
5999 if (at_namespace_scope_p ())
6000 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6001 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6002 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6004 if (current_class_type
6005 && CP_DECL_CONTEXT (decl
) == current_class_type
6006 && TYPE_BEING_DEFINED (current_class_type
)
6007 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6008 && (DECL_INITIAL (decl
) || init
))
6009 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6011 auto_node
= type_uses_auto (type
);
6015 if (init
== NULL_TREE
)
6017 error ("declaration of %q#D has no initializer", decl
);
6018 TREE_TYPE (decl
) = error_mark_node
;
6022 if (TREE_CODE (d_init
) == TREE_LIST
)
6023 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6024 tf_warning_or_error
);
6025 d_init
= resolve_nondeduced_context (d_init
);
6026 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6028 if (type
== error_mark_node
)
6032 if (!ensure_literal_type_for_constexpr_object (decl
))
6033 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6035 if (TREE_CODE (decl
) == VAR_DECL
6036 && DECL_CLASS_SCOPE_P (decl
)
6037 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6038 check_static_variable_definition (decl
, type
);
6040 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6043 if (init
== ridpointers
[(int)RID_DELETE
])
6045 /* FIXME check this is 1st decl. */
6046 DECL_DELETED_FN (decl
) = 1;
6047 DECL_DECLARED_INLINE_P (decl
) = 1;
6048 DECL_INITIAL (decl
) = error_mark_node
;
6049 FOR_EACH_CLONE (clone
, decl
)
6051 DECL_DELETED_FN (clone
) = 1;
6052 DECL_DECLARED_INLINE_P (clone
) = 1;
6053 DECL_INITIAL (clone
) = error_mark_node
;
6057 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6059 if (defaultable_fn_check (decl
))
6060 DECL_DEFAULTED_FN (decl
) = 1;
6062 DECL_INITIAL (decl
) = NULL_TREE
;
6066 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6068 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6069 /* If DECL is a reference, then we want to know whether init is a
6070 reference constant; init_const_expr_p as passed tells us whether
6071 it's an rvalue constant. */
6072 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6073 init_const_expr_p
= potential_constant_expression (init
);
6074 if (init_const_expr_p
)
6076 /* Set these flags now for templates. We'll update the flags in
6077 store_init_value for instantiations. */
6078 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6079 if (decl_maybe_constant_var_p (decl
))
6080 TREE_CONSTANT (decl
) = 1;
6084 if (processing_template_decl
)
6086 bool type_dependent_p
;
6088 /* Add this declaration to the statement-tree. */
6089 if (at_function_scope_p ())
6090 add_decl_expr (decl
);
6092 type_dependent_p
= dependent_type_p (type
);
6094 if (check_for_bare_parameter_packs (init
))
6097 DECL_INITIAL (decl
) = NULL_TREE
;
6100 /* Generally, initializers in templates are expanded when the
6101 template is instantiated. But, if DECL is a variable constant
6102 then it can be used in future constant expressions, so its value
6103 must be available. */
6105 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6106 /* We can't do anything if the decl has dependent type. */;
6108 && init_const_expr_p
6109 && !type_dependent_p
6110 && decl_maybe_constant_var_p (decl
)
6111 && !type_dependent_init_p (init
)
6112 && !value_dependent_init_p (init
))
6114 /* This variable seems to be a non-dependent constant, so process
6115 its initializer. If check_initializer returns non-null the
6116 initialization wasn't constant after all. */
6118 cleanups
= make_tree_vector ();
6119 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6120 if (init_code
== NULL_TREE
)
6122 release_tree_vector (cleanups
);
6124 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6125 /* Deduce array size even if the initializer is dependent. */
6126 maybe_deduce_size_from_array_init (decl
, init
);
6129 DECL_INITIAL (decl
) = init
;
6133 /* Just store non-static data member initializers for later. */
6134 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6135 DECL_INITIAL (decl
) = init
;
6137 /* Take care of TYPE_DECLs up front. */
6138 if (TREE_CODE (decl
) == TYPE_DECL
)
6140 if (type
!= error_mark_node
6141 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6143 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6144 warning (0, "shadowing previous type declaration of %q#D", decl
);
6145 set_identifier_type_value (DECL_NAME (decl
), decl
);
6148 /* If we have installed this as the canonical typedef for this
6149 type, and that type has not been defined yet, delay emitting
6150 the debug information for it, as we will emit it later. */
6151 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6152 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6153 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6155 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6160 /* A reference will be modified here, as it is initialized. */
6161 if (! DECL_EXTERNAL (decl
)
6162 && TREE_READONLY (decl
)
6163 && TREE_CODE (type
) == REFERENCE_TYPE
)
6166 TREE_READONLY (decl
) = 0;
6169 if (TREE_CODE (decl
) == VAR_DECL
)
6171 /* Only variables with trivial initialization and destruction can
6172 have thread-local storage. */
6173 if (DECL_THREAD_LOCAL_P (decl
)
6174 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
6175 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
6176 error ("%qD cannot be thread-local because it has non-trivial "
6177 "type %qT", decl
, TREE_TYPE (decl
));
6178 /* If this is a local variable that will need a mangled name,
6179 register it now. We must do this before processing the
6180 initializer for the variable, since the initialization might
6181 require a guard variable, and since the mangled name of the
6182 guard variable will depend on the mangled name of this
6184 if (DECL_FUNCTION_SCOPE_P (decl
)
6185 && TREE_STATIC (decl
)
6186 && !DECL_ARTIFICIAL (decl
))
6188 push_local_name (decl
);
6189 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6190 || DECL_DESTRUCTOR_P (current_function_decl
))
6191 /* Normally local_decls is populated during GIMPLE lowering,
6192 but [cd]tors are never actually compiled directly. We need
6193 to put statics on the list so we can deal with the label
6194 address extension. */
6195 add_local_decl (cfun
, decl
);
6198 /* Convert the initializer to the type of DECL, if we have not
6199 already initialized DECL. */
6200 if (!DECL_INITIALIZED_P (decl
)
6201 /* If !DECL_EXTERNAL then DECL is being defined. In the
6202 case of a static data member initialized inside the
6203 class-specifier, there can be an initializer even if DECL
6204 is *not* defined. */
6205 && (!DECL_EXTERNAL (decl
) || init
))
6207 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6210 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6211 /* Allow libjava/prims.cc define primitive classes. */
6212 if (init
!= NULL_TREE
6213 || jclass
== NULL_TREE
6214 || TREE_CODE (jclass
) != TYPE_DECL
6215 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6216 || !same_type_ignoring_top_level_qualifiers_p
6217 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6218 error ("Java object %qD not allocated with %<new%>", decl
);
6221 cleanups
= make_tree_vector ();
6222 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6223 /* Thread-local storage cannot be dynamically initialized. */
6224 if (DECL_THREAD_LOCAL_P (decl
) && init
)
6226 error ("%qD is thread-local and so cannot be dynamically "
6227 "initialized", decl
);
6231 /* Check that the initializer for a static data member was a
6232 constant. Although we check in the parser that the
6233 initializer is an integral constant expression, we do not
6234 simplify division-by-zero at the point at which it
6235 occurs. Therefore, in:
6237 struct S { static const int i = 7 / 0; };
6239 we issue an error at this point. It would
6240 probably be better to forbid division by zero in
6241 integral constant expressions. */
6242 if (DECL_EXTERNAL (decl
) && init
)
6244 error ("%qD cannot be initialized by a non-constant expression"
6245 " when being declared", decl
);
6246 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6254 The memory occupied by any object of static storage
6255 duration is zero-initialized at program startup before
6256 any other initialization takes place.
6258 We cannot create an appropriate initializer until after
6259 the type of DECL is finalized. If DECL_INITIAL is set,
6260 then the DECL is statically initialized, and any
6261 necessary zero-initialization has already been performed. */
6262 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6263 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6264 /*nelts=*/NULL_TREE
,
6265 /*static_storage_p=*/true);
6266 /* Remember that the initialization for this variable has
6268 DECL_INITIALIZED_P (decl
) = 1;
6269 /* This declaration is the definition of this variable,
6270 unless we are initializing a static data member within
6271 the class specifier. */
6272 if (!DECL_EXTERNAL (decl
))
6273 var_definition_p
= true;
6275 /* If the variable has an array type, lay out the type, even if
6276 there is no initializer. It is valid to index through the
6277 array, and we must get TYPE_ALIGN set correctly on the array
6279 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6282 if (TREE_STATIC (decl
)
6283 && !at_function_scope_p ()
6284 && current_function_decl
== NULL
)
6285 /* So decl is a global variable or a static member of a
6286 non local class. Record the types it uses
6287 so that we can decide later to emit debug info for them. */
6288 record_types_used_by_current_var_decl (decl
);
6290 else if (TREE_CODE (decl
) == FIELD_DECL
6291 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6292 error ("non-static data member %qD has Java class type", decl
);
6294 /* Add this declaration to the statement-tree. This needs to happen
6295 after the call to check_initializer so that the DECL_EXPR for a
6296 reference temp is added before the DECL_EXPR for the reference itself. */
6297 if (DECL_FUNCTION_SCOPE_P (decl
))
6298 add_decl_expr (decl
);
6300 /* Let the middle end know about variables and functions -- but not
6301 static data members in uninstantiated class templates. */
6302 if (TREE_CODE (decl
) == VAR_DECL
6303 || TREE_CODE (decl
) == FUNCTION_DECL
)
6305 if (TREE_CODE (decl
) == VAR_DECL
)
6307 layout_var_decl (decl
);
6308 maybe_commonize_var (decl
);
6311 /* This needs to happen after the linkage is set. */
6312 determine_visibility (decl
);
6314 if (var_definition_p
&& TREE_STATIC (decl
))
6316 /* If a TREE_READONLY variable needs initialization
6317 at runtime, it is no longer readonly and we need to
6318 avoid MEM_READONLY_P being set on RTL created for it. */
6321 if (TREE_READONLY (decl
))
6322 TREE_READONLY (decl
) = 0;
6325 else if (was_readonly
)
6326 TREE_READONLY (decl
) = 1;
6329 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6331 /* Check for abstractness of the type. Notice that there is no
6332 need to strip array types here since the check for those types
6333 is already done within create_array_type_for_decl. */
6334 if (TREE_CODE (type
) == FUNCTION_TYPE
6335 || TREE_CODE (type
) == METHOD_TYPE
)
6336 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6338 abstract_virtuals_error (decl
, type
);
6340 if (TREE_TYPE (decl
) == error_mark_node
)
6341 /* No initialization required. */
6343 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6347 if (init
== ridpointers
[(int)RID_DEFAULT
])
6349 /* An out-of-class default definition is defined at
6350 the point where it is explicitly defaulted. */
6351 if (DECL_DELETED_FN (decl
))
6352 maybe_explain_implicit_delete (decl
);
6353 else if (DECL_INITIAL (decl
) == error_mark_node
)
6354 synthesize_method (decl
);
6357 error ("function %q#D is initialized like a variable", decl
);
6359 /* else no initialization required. */
6361 else if (DECL_EXTERNAL (decl
)
6362 && ! (DECL_LANG_SPECIFIC (decl
)
6363 && DECL_NOT_REALLY_EXTERN (decl
)))
6366 DECL_INITIAL (decl
) = init
;
6368 /* A variable definition. */
6369 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6370 /* Initialize the local variable. */
6371 initialize_local_var (decl
, init
);
6373 /* If a variable is defined, and then a subsequent
6374 definition with external linkage is encountered, we will
6375 get here twice for the same variable. We want to avoid
6376 calling expand_static_init more than once. For variables
6377 that are not static data members, we can call
6378 expand_static_init only when we actually process the
6379 initializer. It is not legal to redeclare a static data
6380 member, so this issue does not arise in that case. */
6381 else if (var_definition_p
&& TREE_STATIC (decl
))
6382 expand_static_init (decl
, init
);
6385 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6386 reference, insert it in the statement-tree now. */
6390 FOR_EACH_VEC_ELT (tree
, cleanups
, i
, t
)
6391 push_cleanup (decl
, t
, false);
6392 release_tree_vector (cleanups
);
6396 TREE_READONLY (decl
) = 1;
6398 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6401 /* Returns a declaration for a VAR_DECL as if:
6403 extern "C" TYPE NAME;
6405 had been seen. Used to create compiler-generated global
6409 declare_global_var (tree name
, tree type
)
6413 push_to_top_level ();
6414 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6415 TREE_PUBLIC (decl
) = 1;
6416 DECL_EXTERNAL (decl
) = 1;
6417 DECL_ARTIFICIAL (decl
) = 1;
6418 /* If the user has explicitly declared this variable (perhaps
6419 because the code we are compiling is part of a low-level runtime
6420 library), then it is possible that our declaration will be merged
6421 with theirs by pushdecl. */
6422 decl
= pushdecl (decl
);
6423 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6424 pop_from_top_level ();
6429 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6430 if "__cxa_atexit" is not being used) corresponding to the function
6431 to be called when the program exits. */
6434 get_atexit_fn_ptr_type (void)
6438 if (!atexit_fn_ptr_type_node
)
6441 if (flag_use_cxa_atexit
6442 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6443 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6444 arg_type
= ptr_type_node
;
6446 /* The parameter to "atexit" is "void (*)(void)". */
6447 arg_type
= NULL_TREE
;
6449 fn_type
= build_function_type_list (void_type_node
,
6450 arg_type
, NULL_TREE
);
6451 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6454 return atexit_fn_ptr_type_node
;
6457 /* Returns a pointer to the `atexit' function. Note that if
6458 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6459 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6462 get_atexit_node (void)
6468 bool use_aeabi_atexit
;
6473 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6475 /* The declaration for `__cxa_atexit' is:
6477 int __cxa_atexit (void (*)(void *), void *, void *)
6479 We build up the argument types and then the function type
6481 tree argtype0
, argtype1
, argtype2
;
6483 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6484 /* First, build the pointer-to-function type for the first
6486 fn_ptr_type
= get_atexit_fn_ptr_type ();
6487 /* Then, build the rest of the argument types. */
6488 argtype2
= ptr_type_node
;
6489 if (use_aeabi_atexit
)
6491 argtype1
= fn_ptr_type
;
6492 argtype0
= ptr_type_node
;
6496 argtype1
= ptr_type_node
;
6497 argtype0
= fn_ptr_type
;
6499 /* And the final __cxa_atexit type. */
6500 fn_type
= build_function_type_list (integer_type_node
,
6501 argtype0
, argtype1
, argtype2
,
6503 fn_ptr_type
= build_pointer_type (fn_type
);
6504 if (use_aeabi_atexit
)
6505 name
= "__aeabi_atexit";
6507 name
= "__cxa_atexit";
6511 /* The declaration for `atexit' is:
6513 int atexit (void (*)());
6515 We build up the argument types and then the function type
6517 fn_ptr_type
= get_atexit_fn_ptr_type ();
6518 /* Build the final atexit type. */
6519 fn_type
= build_function_type_list (integer_type_node
,
6520 fn_ptr_type
, NULL_TREE
);
6524 /* Now, build the function declaration. */
6525 push_lang_context (lang_name_c
);
6526 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6527 mark_used (atexit_fndecl
);
6528 pop_lang_context ();
6529 atexit_node
= decay_conversion (atexit_fndecl
);
6534 /* Returns the __dso_handle VAR_DECL. */
6537 get_dso_handle_node (void)
6539 if (dso_handle_node
)
6540 return dso_handle_node
;
6542 /* Declare the variable. */
6543 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6546 #ifdef HAVE_GAS_HIDDEN
6547 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6548 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6551 return dso_handle_node
;
6554 /* Begin a new function with internal linkage whose job will be simply
6555 to destroy some particular variable. */
6557 static GTY(()) int start_cleanup_cnt
;
6560 start_cleanup_fn (void)
6565 bool use_cxa_atexit
= flag_use_cxa_atexit
6566 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6568 push_to_top_level ();
6570 /* No need to mangle this. */
6571 push_lang_context (lang_name_c
);
6573 /* Build the name of the function. */
6574 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6575 /* Build the function declaration. */
6576 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6577 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6578 /* It's a function with internal linkage, generated by the
6580 TREE_PUBLIC (fndecl
) = 0;
6581 DECL_ARTIFICIAL (fndecl
) = 1;
6582 /* Make the function `inline' so that it is only emitted if it is
6583 actually needed. It is unlikely that it will be inlined, since
6584 it is only called via a function pointer, but we avoid unnecessary
6585 emissions this way. */
6586 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6587 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6588 /* Build the parameter. */
6593 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6594 DECL_CONTEXT (parmdecl
) = fndecl
;
6595 TREE_USED (parmdecl
) = 1;
6596 DECL_READ_P (parmdecl
) = 1;
6597 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6601 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6603 pop_lang_context ();
6605 return current_function_decl
;
6608 /* Finish the cleanup function begun by start_cleanup_fn. */
6611 end_cleanup_fn (void)
6613 expand_or_defer_fn (finish_function (0));
6615 pop_from_top_level ();
6618 /* Generate code to handle the destruction of DECL, an object with
6619 static storage duration. */
6622 register_dtor_fn (tree decl
)
6629 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6631 type
= TREE_TYPE (decl
);
6632 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6633 return void_zero_node
;
6635 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6636 a class object, we can just pass the destructor to
6637 "__cxa_atexit"; we don't have to build a temporary function to do
6639 use_dtor
= (flag_use_cxa_atexit
6640 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6641 && CLASS_TYPE_P (type
));
6646 /* Find the destructor. */
6647 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6648 gcc_assert (idx
>= 0);
6649 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6650 /* Make sure it is accessible. */
6651 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6655 /* Call build_cleanup before we enter the anonymous function so
6656 that any access checks will be done relative to the current
6657 scope, rather than the scope of the anonymous function. */
6658 build_cleanup (decl
);
6660 /* Now start the function. */
6661 cleanup
= start_cleanup_fn ();
6663 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6664 to the original function, rather than the anonymous one. That
6665 will make the back end think that nested functions are in use,
6666 which causes confusion. */
6667 push_deferring_access_checks (dk_no_check
);
6668 fcall
= build_cleanup (decl
);
6669 pop_deferring_access_checks ();
6671 /* Create the body of the anonymous function. */
6672 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6673 finish_expr_stmt (fcall
);
6674 finish_compound_stmt (compound_stmt
);
6678 /* Call atexit with the cleanup function. */
6679 mark_used (cleanup
);
6680 cleanup
= build_address (cleanup
);
6681 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6687 /* We must convert CLEANUP to the type that "__cxa_atexit"
6689 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6690 /* "__cxa_atexit" will pass the address of DECL to the
6691 cleanup function. */
6693 addr
= build_address (decl
);
6694 /* The declared type of the parameter to "__cxa_atexit" is
6695 "void *". For plain "T*", we could just let the
6696 machinery in cp_build_function_call convert it -- but if the
6697 type is "cv-qualified T *", then we need to convert it
6698 before passing it in, to avoid spurious errors. */
6699 addr
= build_nop (ptr_type_node
, addr
);
6702 /* Since the cleanup functions we build ignore the address
6703 they're given, there's no reason to pass the actual address
6704 in, and, in general, it's cheaper to pass NULL than any
6706 addr
= null_pointer_node
;
6707 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6708 tf_warning_or_error
);
6709 if (targetm
.cxx
.use_aeabi_atexit ())
6722 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6723 arg0
, arg1
, arg2
, NULL_TREE
);
6726 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6727 is its initializer. Generate code to handle the construction
6728 and destruction of DECL. */
6731 expand_static_init (tree decl
, tree init
)
6733 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6734 gcc_assert (TREE_STATIC (decl
));
6736 /* Some variables require no dynamic initialization. */
6738 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6741 if (DECL_FUNCTION_SCOPE_P (decl
))
6743 /* Emit code to perform this initialization but once. */
6744 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6745 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6746 tree guard
, guard_addr
;
6749 /* Emit code to perform this initialization but once. This code
6752 static <type> guard;
6753 if (!guard.first_byte) {
6754 if (__cxa_guard_acquire (&guard)) {
6757 // Do initialization.
6758 flag = true; __cxa_guard_release (&guard);
6759 // Register variable for destruction at end of program.
6761 if (!flag) __cxa_guard_abort (&guard);
6765 Note that the `flag' variable is only set to 1 *after* the
6766 initialization is complete. This ensures that an exception,
6767 thrown during the construction, will cause the variable to
6768 reinitialized when we pass through this code again, as per:
6772 If the initialization exits by throwing an exception, the
6773 initialization is not complete, so it will be tried again
6774 the next time control enters the declaration.
6776 This process should be thread-safe, too; multiple threads
6777 should not be able to initialize the variable more than
6780 /* Create the guard variable. */
6781 guard
= get_guard (decl
);
6783 /* This optimization isn't safe on targets with relaxed memory
6784 consistency. On such targets we force synchronization in
6785 __cxa_guard_acquire. */
6786 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6788 /* Begin the conditional initialization. */
6789 if_stmt
= begin_if_stmt ();
6790 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6791 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6794 if (flag_threadsafe_statics
)
6796 tree vfntype
= NULL_TREE
;
6797 tree acquire_name
, release_name
, abort_name
;
6798 tree acquire_fn
, release_fn
, abort_fn
;
6799 guard_addr
= build_address (guard
);
6801 acquire_name
= get_identifier ("__cxa_guard_acquire");
6802 release_name
= get_identifier ("__cxa_guard_release");
6803 abort_name
= get_identifier ("__cxa_guard_abort");
6804 acquire_fn
= identifier_global_value (acquire_name
);
6805 release_fn
= identifier_global_value (release_name
);
6806 abort_fn
= identifier_global_value (abort_name
);
6808 acquire_fn
= push_library_fn
6809 (acquire_name
, build_function_type_list (integer_type_node
,
6810 TREE_TYPE (guard_addr
),
6813 if (!release_fn
|| !abort_fn
)
6814 vfntype
= build_function_type_list (void_type_node
,
6815 TREE_TYPE (guard_addr
),
6818 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6820 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6822 inner_if_stmt
= begin_if_stmt ();
6823 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6826 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6827 begin
= get_target_expr (boolean_false_node
);
6828 flag
= TARGET_EXPR_SLOT (begin
);
6830 TARGET_EXPR_CLEANUP (begin
)
6831 = build3 (COND_EXPR
, void_type_node
, flag
,
6833 build_call_n (abort_fn
, 1, guard_addr
));
6834 CLEANUP_EH_ONLY (begin
) = 1;
6836 /* Do the initialization itself. */
6837 init
= add_stmt_to_compound (begin
, init
);
6838 init
= add_stmt_to_compound
6839 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6840 init
= add_stmt_to_compound
6841 (init
, build_call_n (release_fn
, 1, guard_addr
));
6844 init
= add_stmt_to_compound (init
, set_guard (guard
));
6846 /* Use atexit to register a function for destroying this static
6848 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6850 finish_expr_stmt (init
);
6852 if (flag_threadsafe_statics
)
6854 finish_compound_stmt (inner_then_clause
);
6855 finish_then_clause (inner_if_stmt
);
6856 finish_if_stmt (inner_if_stmt
);
6859 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6861 finish_compound_stmt (then_clause
);
6862 finish_then_clause (if_stmt
);
6863 finish_if_stmt (if_stmt
);
6867 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6871 /* Make TYPE a complete type based on INITIAL_VALUE.
6872 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6873 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6874 3 if the initializer list is empty (in pedantic mode). */
6877 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6880 tree type
, elt_type
;
6884 unsigned HOST_WIDE_INT i
;
6887 /* An array of character type can be initialized from a
6888 brace-enclosed string constant.
6890 FIXME: this code is duplicated from reshape_init. Probably
6891 we should just call reshape_init here? */
6892 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6893 && TREE_CODE (initial_value
) == CONSTRUCTOR
6894 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6896 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6897 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6899 if (TREE_CODE (value
) == STRING_CST
6900 && VEC_length (constructor_elt
, v
) == 1)
6901 initial_value
= value
;
6904 /* If any of the elements are parameter packs, we can't actually
6905 complete this type now because the array size is dependent. */
6906 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6908 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6911 if (PACK_EXPANSION_P (value
))
6917 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6919 /* We can create the array before the element type is complete, which
6920 means that we didn't have these two bits set in the original type
6921 either. In completing the type, we are expected to propagate these
6922 bits. See also complete_type which does the same thing for arrays
6925 if (TYPE_DOMAIN (type
))
6927 elt_type
= TREE_TYPE (type
);
6928 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6929 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6930 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6936 /* As above, but either give an error or reject zero-size arrays, depending
6940 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
6941 bool do_default
, tsubst_flags_t complain
)
6944 bool sfinae
= !(complain
& tf_error
);
6945 /* In SFINAE context we can't be lenient about zero-size arrays. */
6948 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
6954 /* Not an error. */;
6955 else if (failure
== 1)
6956 error ("initializer fails to determine size of %qT", *ptype
);
6957 else if (failure
== 2)
6960 error ("array size missing in %qT", *ptype
);
6962 else if (failure
== 3)
6963 error ("zero-size array %qT", *ptype
);
6964 *ptype
= error_mark_node
;
6969 /* Return zero if something is declared to be a member of type
6970 CTYPE when in the context of CUR_TYPE. STRING is the error
6971 message to print in that case. Otherwise, quietly return 1. */
6974 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6976 if (ctype
&& ctype
!= cur_type
)
6978 if (flags
== DTOR_FLAG
)
6979 error ("destructor for alien class %qT cannot be a member", ctype
);
6981 error ("constructor for alien class %qT cannot be a member", ctype
);
6987 /* Subroutine of `grokdeclarator'. */
6989 /* Generate errors possibly applicable for a given set of specifiers.
6990 This is for ARM $7.1.2. */
6993 bad_specifiers (tree object
,
6994 enum bad_spec_place type
,
7005 error ("%qD declared as a %<virtual%> variable", object
);
7007 error ("%qD declared as an %<inline%> variable", object
);
7009 error ("%<const%> and %<volatile%> function specifiers on "
7010 "%qD invalid in variable declaration", object
);
7014 error ("%qD declared as a %<virtual%> parameter", object
);
7016 error ("%qD declared as an %<inline%> parameter", object
);
7018 error ("%<const%> and %<volatile%> function specifiers on "
7019 "%qD invalid in parameter declaration", object
);
7023 error ("%qD declared as a %<virtual%> type", object
);
7025 error ("%qD declared as an %<inline%> type", object
);
7027 error ("%<const%> and %<volatile%> function specifiers on "
7028 "%qD invalid in type declaration", object
);
7032 error ("%qD declared as a %<virtual%> field", object
);
7034 error ("%qD declared as an %<inline%> field", object
);
7036 error ("%<const%> and %<volatile%> function specifiers on "
7037 "%qD invalid in field declaration", object
);
7043 error ("%q+D declared as a friend", object
);
7045 && (TREE_CODE (object
) == TYPE_DECL
7046 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7047 && !TYPE_REFFN_P (TREE_TYPE (object
))
7048 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7049 error ("%q+D declared with an exception specification", object
);
7052 /* DECL is a member function or static data member and is presently
7053 being defined. Check that the definition is taking place in a
7057 check_class_member_definition_namespace (tree decl
)
7059 /* These checks only apply to member functions and static data
7061 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7062 || TREE_CODE (decl
) == VAR_DECL
);
7063 /* We check for problems with specializations in pt.c in
7064 check_specialization_namespace, where we can issue better
7066 if (processing_specialization
)
7068 /* There are no restrictions on the placement of
7069 explicit instantiations. */
7070 if (processing_explicit_instantiation
)
7074 A member function definition that appears outside of the
7075 class definition shall appear in a namespace scope enclosing
7076 the class definition.
7080 The definition for a static data member shall appear in a
7081 namespace scope enclosing the member's class definition. */
7082 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7083 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7084 decl
, DECL_CONTEXT (decl
));
7087 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7088 METHOD_TYPE for a non-static member function; QUALS are the
7089 cv-qualifiers that apply to the function. */
7092 build_this_parm (tree type
, cp_cv_quals quals
)
7097 cp_cv_quals this_quals
;
7099 if (CLASS_TYPE_P (type
))
7102 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7103 this_type
= build_pointer_type (this_type
);
7106 this_type
= type_of_this_parm (type
);
7107 /* The `this' parameter is implicitly `const'; it cannot be
7109 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7110 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7111 parm
= build_artificial_parm (this_identifier
, qual_type
);
7112 cp_apply_type_quals_to_decl (this_quals
, parm
);
7116 /* DECL is a static member function. Complain if it was declared
7117 with function-cv-quals. */
7120 check_static_quals (tree decl
, cp_cv_quals quals
)
7122 if (quals
!= TYPE_UNQUALIFIED
)
7123 error ("static member function %q#D declared with type qualifiers",
7127 /* CTYPE is class type, or null if non-class.
7128 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7130 DECLARATOR is the function's name.
7131 PARMS is a chain of PARM_DECLs for the function.
7132 VIRTUALP is truthvalue of whether the function is virtual or not.
7133 FLAGS are to be passed through to `grokclassfn'.
7134 QUALS are qualifiers indicating whether the function is `const'
7136 RAISES is a list of exceptions that this function can raise.
7137 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7138 not look, and -1 if we should not call `grokclassfn' at all.
7140 SFK is the kind of special function (if any) for the new function.
7142 Returns `NULL_TREE' if something goes wrong, after issuing
7143 applicable error messages. */
7146 grokfndecl (tree ctype
,
7150 tree orig_declarator
,
7152 enum overload_flags flags
,
7159 special_function_kind sfk
,
7164 location_t location
)
7167 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7171 type
= build_exception_variant (type
, raises
);
7173 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7175 /* If we have an explicit location, use it, otherwise use whatever
7176 build_lang_decl used (probably input_location). */
7177 if (location
!= UNKNOWN_LOCATION
)
7178 DECL_SOURCE_LOCATION (decl
) = location
;
7180 if (TREE_CODE (type
) == METHOD_TYPE
)
7183 parm
= build_this_parm (type
, quals
);
7184 DECL_CHAIN (parm
) = parms
;
7187 DECL_ARGUMENTS (decl
) = parms
;
7188 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7189 DECL_CONTEXT (t
) = decl
;
7190 /* Propagate volatile out from type to decl. */
7191 if (TYPE_VOLATILE (type
))
7192 TREE_THIS_VOLATILE (decl
) = 1;
7194 /* Setup decl according to sfk. */
7197 case sfk_constructor
:
7198 case sfk_copy_constructor
:
7199 case sfk_move_constructor
:
7200 DECL_CONSTRUCTOR_P (decl
) = 1;
7202 case sfk_destructor
:
7203 DECL_DESTRUCTOR_P (decl
) = 1;
7209 /* If pointers to member functions use the least significant bit to
7210 indicate whether a function is virtual, ensure a pointer
7211 to this function will have that bit clear. */
7212 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7213 && TREE_CODE (type
) == METHOD_TYPE
7214 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7215 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7218 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7222 ("defining explicit specialization %qD in friend declaration",
7226 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7227 tree args
= TREE_OPERAND (orig_declarator
, 1);
7229 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7231 /* Something like `template <class T> friend void f<T>()'. */
7232 error ("invalid use of template-id %qD in declaration "
7233 "of primary template",
7239 /* A friend declaration of the form friend void f<>(). Record
7240 the information in the TEMPLATE_ID_EXPR. */
7241 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7243 if (TREE_CODE (fns
) == COMPONENT_REF
)
7245 /* Due to bison parser ickiness, we will have already looked
7246 up an operator_name or PFUNCNAME within the current class
7247 (see template_id in parse.y). If the current class contains
7248 such a name, we'll get a COMPONENT_REF here. Undo that. */
7250 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7251 == current_class_type
);
7252 fns
= TREE_OPERAND (fns
, 1);
7254 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7255 || TREE_CODE (fns
) == OVERLOAD
);
7256 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7258 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7259 if (TREE_PURPOSE (t
)
7260 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7262 error ("default arguments are not allowed in declaration "
7263 "of friend template specialization %qD",
7270 error ("%<inline%> is not allowed in declaration of friend "
7271 "template specialization %qD",
7278 /* If this decl has namespace scope, set that up. */
7280 set_decl_namespace (decl
, in_namespace
, friendp
);
7282 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7284 /* `main' and builtins have implicit 'C' linkage. */
7285 if ((MAIN_NAME_P (declarator
)
7286 || (IDENTIFIER_LENGTH (declarator
) > 10
7287 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7288 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7289 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7290 && current_lang_name
== lang_name_cplusplus
7291 && ctype
== NULL_TREE
7292 && DECL_FILE_SCOPE_P (decl
))
7293 SET_DECL_LANGUAGE (decl
, lang_c
);
7295 /* Should probably propagate const out from type to decl I bet (mrs). */
7298 DECL_STATIC_FUNCTION_P (decl
) = 1;
7299 DECL_CONTEXT (decl
) = ctype
;
7304 DECL_CONTEXT (decl
) = ctype
;
7306 check_class_member_definition_namespace (decl
);
7309 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7311 if (processing_template_decl
)
7312 error ("cannot declare %<::main%> to be a template");
7314 error ("cannot declare %<::main%> to be inline");
7316 error ("cannot declare %<::main%> to be static");
7321 /* Members of anonymous types and local classes have no linkage; make
7322 them internal. If a typedef is made later, this will be changed. */
7323 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7324 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7327 if (publicp
&& cxx_dialect
== cxx98
)
7329 /* [basic.link]: A name with no linkage (notably, the name of a class
7330 or enumeration declared in a local scope) shall not be used to
7331 declare an entity with linkage.
7333 DR 757 relaxes this restriction for C++0x. */
7334 t
= no_linkage_check (TREE_TYPE (decl
),
7335 /*relaxed_p=*/false);
7338 if (TYPE_ANONYMOUS_P (t
))
7340 if (DECL_EXTERN_C_P (decl
))
7341 /* Allow this; it's pretty common in C. */;
7344 permerror (input_location
, "anonymous type with no linkage "
7345 "used to declare function %q#D with linkage",
7347 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7348 permerror (input_location
, "%q+#D does not refer to the unqualified "
7349 "type, so it is not used for linkage",
7354 permerror (input_location
, "type %qT with no linkage used to "
7355 "declare function %q#D with linkage", t
, decl
);
7359 TREE_PUBLIC (decl
) = publicp
;
7362 DECL_INTERFACE_KNOWN (decl
) = 1;
7363 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7366 /* If the declaration was declared inline, mark it as such. */
7368 DECL_DECLARED_INLINE_P (decl
) = 1;
7370 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7372 DECL_EXTERNAL (decl
) = 1;
7373 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7376 ? G_("static member function %qD cannot have cv-qualifier")
7377 : G_("non-member function %qD cannot have cv-qualifier"),
7379 quals
= TYPE_UNQUALIFIED
;
7382 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7383 && !grok_op_properties (decl
, /*complain=*/true))
7385 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7387 bool long_long_unsigned_p
;
7389 const char *suffix
= NULL
;
7390 /* [over.literal]/6: Literal operators shall not have C linkage. */
7391 if (DECL_LANGUAGE (decl
) == lang_c
)
7393 error ("literal operator with C linkage");
7397 if (DECL_NAMESPACE_SCOPE_P (decl
))
7399 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7402 error ("%qD has invalid argument list", decl
);
7406 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7407 if (long_long_unsigned_p
)
7409 if (cpp_interpret_int_suffix (suffix
, strlen (suffix
)))
7410 warning (0, "integer suffix %<%s%>"
7411 " shadowed by implementation", suffix
);
7413 else if (long_double_p
)
7415 if (cpp_interpret_float_suffix (suffix
, strlen (suffix
)))
7416 warning (0, "floating point suffix %<%s%>"
7417 " shadowed by implementation", suffix
);
7422 error ("%qD must be a non-member function", decl
);
7428 /* Make the init_value nonzero so pushdecl knows this is not
7429 tentative. error_mark_node is replaced later with the BLOCK. */
7430 DECL_INITIAL (decl
) = error_mark_node
;
7432 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7433 TREE_NOTHROW (decl
) = 1;
7435 /* Caller will do the rest of this. */
7439 if (ctype
!= NULL_TREE
)
7440 grokclassfn (ctype
, decl
, flags
);
7442 decl
= check_explicit_specialization (orig_declarator
, decl
,
7445 4 * (friendp
!= 0));
7446 if (decl
== error_mark_node
)
7449 if (DECL_STATIC_FUNCTION_P (decl
))
7450 check_static_quals (decl
, quals
);
7454 cplus_decl_attributes (&decl
, *attrlist
, 0);
7455 *attrlist
= NULL_TREE
;
7458 /* Check main's type after attributes have been applied. */
7459 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7461 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7464 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7466 error ("%<::main%> must return %<int%>");
7467 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7468 TREE_TYPE (decl
) = newtype
;
7471 check_main_parameter_types (decl
);
7474 if (ctype
!= NULL_TREE
7475 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7478 tree old_decl
= check_classfn (ctype
, decl
,
7479 (processing_template_decl
7480 > template_class_depth (ctype
))
7481 ? current_template_parms
7484 if (old_decl
== error_mark_node
)
7492 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7493 /* Because grokfndecl is always supposed to return a
7494 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7495 here. We depend on our callers to figure out that its
7496 really a template that's being returned. */
7497 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7499 if (DECL_STATIC_FUNCTION_P (old_decl
)
7500 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7502 /* Remove the `this' parm added by grokclassfn. */
7503 revert_static_member_fn (decl
);
7504 check_static_quals (decl
, quals
);
7506 if (DECL_ARTIFICIAL (old_decl
))
7508 error ("definition of implicitly-declared %qD", old_decl
);
7511 else if (DECL_DEFAULTED_FN (old_decl
))
7513 error ("definition of explicitly-defaulted %q+D", decl
);
7514 error ("%q+#D explicitly defaulted here", old_decl
);
7518 /* Since we've smashed OLD_DECL to its
7519 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7520 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7521 decl
= DECL_TEMPLATE_RESULT (decl
);
7523 /* Attempt to merge the declarations. This can fail, in
7524 the case of some invalid specialization declarations. */
7525 pushed_scope
= push_scope (ctype
);
7526 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7528 pop_scope (pushed_scope
);
7531 error ("no %q#D member function declared in class %qT",
7539 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7542 if (ctype
== NULL_TREE
|| check
)
7546 DECL_VIRTUAL_P (decl
) = 1;
7551 /* decl is a FUNCTION_DECL.
7552 specifiers are the parsed virt-specifiers.
7554 Set flags to reflect the virt-specifiers.
7559 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7561 if (decl
== NULL_TREE
)
7563 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7564 DECL_OVERRIDE_P (decl
) = 1;
7565 if (specifiers
& VIRT_SPEC_FINAL
)
7566 DECL_FINAL_P (decl
) = 1;
7570 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7571 the linkage that DECL will receive in the object file. */
7574 set_linkage_for_static_data_member (tree decl
)
7576 /* A static data member always has static storage duration and
7577 external linkage. Note that static data members are forbidden in
7578 local classes -- the only situation in which a class has
7579 non-external linkage. */
7580 TREE_PUBLIC (decl
) = 1;
7581 TREE_STATIC (decl
) = 1;
7582 /* For non-template classes, static data members are always put
7583 out in exactly those files where they are defined, just as
7584 with ordinary namespace-scope variables. */
7585 if (!processing_template_decl
)
7586 DECL_INTERFACE_KNOWN (decl
) = 1;
7589 /* Create a VAR_DECL named NAME with the indicated TYPE.
7591 If SCOPE is non-NULL, it is the class type or namespace containing
7592 the variable. If SCOPE is NULL, the variable should is created in
7593 the innermost enclosings scope. */
7596 grokvardecl (tree type
,
7598 const cp_decl_specifier_seq
*declspecs
,
7604 tree explicit_scope
;
7606 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7608 /* Compute the scope in which to place the variable, but remember
7609 whether or not that scope was explicitly specified by the user. */
7610 explicit_scope
= scope
;
7613 /* An explicit "extern" specifier indicates a namespace-scope
7615 if (declspecs
->storage_class
== sc_extern
)
7616 scope
= current_decl_namespace ();
7617 else if (!at_function_scope_p ())
7618 scope
= current_scope ();
7622 && (/* If the variable is a namespace-scope variable declared in a
7623 template, we need DECL_LANG_SPECIFIC. */
7624 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7625 /* Similarly for namespace-scope variables with language linkage
7627 || (TREE_CODE (scope
) == NAMESPACE_DECL
7628 && current_lang_name
!= lang_name_cplusplus
)
7629 /* Similarly for static data members. */
7631 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7633 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7635 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7636 set_decl_namespace (decl
, explicit_scope
, 0);
7638 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7640 if (declspecs
->storage_class
== sc_extern
)
7642 DECL_THIS_EXTERN (decl
) = 1;
7643 DECL_EXTERNAL (decl
) = !initialized
;
7646 if (DECL_CLASS_SCOPE_P (decl
))
7648 set_linkage_for_static_data_member (decl
);
7649 /* This function is only called with out-of-class definitions. */
7650 DECL_EXTERNAL (decl
) = 0;
7651 check_class_member_definition_namespace (decl
);
7653 /* At top level, either `static' or no s.c. makes a definition
7654 (perhaps tentative), and absence of `static' makes it public. */
7655 else if (toplevel_bindings_p ())
7657 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7658 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7659 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7661 /* Not at top level, only `static' makes a static definition. */
7664 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7665 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7668 if (declspecs
->specs
[(int)ds_thread
])
7669 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7671 /* If the type of the decl has no linkage, make sure that we'll
7672 notice that in mark_used. */
7673 if (cxx_dialect
> cxx98
7674 && decl_linkage (decl
) != lk_none
7675 && DECL_LANG_SPECIFIC (decl
) == NULL
7676 && !DECL_EXTERN_C_P (decl
)
7677 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7678 retrofit_lang_decl (decl
);
7680 if (TREE_PUBLIC (decl
))
7682 /* [basic.link]: A name with no linkage (notably, the name of a class
7683 or enumeration declared in a local scope) shall not be used to
7684 declare an entity with linkage.
7686 DR 757 relaxes this restriction for C++0x. */
7687 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7688 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7691 if (TYPE_ANONYMOUS_P (t
))
7693 if (DECL_EXTERN_C_P (decl
))
7694 /* Allow this; it's pretty common in C. */
7698 /* DRs 132, 319 and 389 seem to indicate types with
7699 no linkage can only be used to declare extern "C"
7700 entities. Since it's not always an error in the
7701 ISO C++ 90 Standard, we only issue a warning. */
7702 warning (0, "anonymous type with no linkage used to declare "
7703 "variable %q#D with linkage", decl
);
7704 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7705 warning (0, "%q+#D does not refer to the unqualified "
7706 "type, so it is not used for linkage",
7711 warning (0, "type %qT with no linkage used to declare variable "
7712 "%q#D with linkage", t
, decl
);
7716 DECL_INTERFACE_KNOWN (decl
) = 1;
7721 /* Create and return a canonical pointer to member function type, for
7722 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7725 build_ptrmemfunc_type (tree type
)
7729 tree unqualified_variant
= NULL_TREE
;
7731 if (type
== error_mark_node
)
7734 /* If a canonical type already exists for this type, use it. We use
7735 this method instead of type_hash_canon, because it only does a
7736 simple equality check on the list of field members. */
7738 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7741 /* Make sure that we always have the unqualified pointer-to-member
7743 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7745 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7747 t
= make_class_type (RECORD_TYPE
);
7748 xref_basetypes (t
, NULL_TREE
);
7750 /* Let the front end know this is a pointer to member function... */
7751 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7752 /* ... and not really a class type. */
7753 SET_CLASS_TYPE_P (t
, 0);
7755 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7758 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7760 DECL_CHAIN (field
) = fields
;
7763 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7765 /* Zap out the name so that the back end will give us the debugging
7766 information for this anonymous RECORD_TYPE. */
7767 TYPE_NAME (t
) = NULL_TREE
;
7769 /* If this is not the unqualified form of this pointer-to-member
7770 type, set the TYPE_MAIN_VARIANT for this type to be the
7771 unqualified type. Since they are actually RECORD_TYPEs that are
7772 not variants of each other, we must do this manually.
7773 As we just built a new type there is no need to do yet another copy. */
7774 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7776 int type_quals
= cp_type_quals (type
);
7777 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7778 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7779 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7780 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7781 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7782 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7783 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7786 /* Cache this pointer-to-member type so that we can find it again
7788 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7790 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7791 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7792 else if (TYPE_CANONICAL (type
) != type
)
7793 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7798 /* Create and return a pointer to data member type. */
7801 build_ptrmem_type (tree class_type
, tree member_type
)
7803 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7805 cp_cv_quals quals
= type_memfn_quals (member_type
);
7806 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7807 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7811 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7812 return build_offset_type (class_type
, member_type
);
7816 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7817 Check to see that the definition is valid. Issue appropriate error
7818 messages. Return 1 if the definition is particularly bad, or 0
7822 check_static_variable_definition (tree decl
, tree type
)
7824 /* Can't check yet if we don't know the type. */
7825 if (dependent_type_p (type
))
7827 /* If DECL is declared constexpr, we'll do the appropriate checks
7828 in check_initializer. */
7829 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
7831 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7833 if (!COMPLETE_TYPE_P (type
))
7834 error ("in-class initialization of static data member %q#D of "
7835 "incomplete type", decl
);
7836 else if (literal_type_p (type
))
7837 permerror (input_location
,
7838 "%<constexpr%> needed for in-class initialization of "
7839 "static data member %q#D of non-integral type", decl
);
7841 error ("in-class initialization of static data member %q#D of "
7842 "non-literal type", decl
);
7846 /* Motion 10 at San Diego: If a static const integral data member is
7847 initialized with an integral constant expression, the initializer
7848 may appear either in the declaration (within the class), or in
7849 the definition, but not both. If it appears in the class, the
7850 member is a member constant. The file-scope definition is always
7852 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7854 error ("invalid in-class initialization of static data member "
7855 "of non-integral type %qT",
7859 else if (!CP_TYPE_CONST_P (type
))
7860 error ("ISO C++ forbids in-class initialization of non-const "
7861 "static member %qD",
7863 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7864 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7865 "%qD of non-integral type %qT", decl
, type
);
7870 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7871 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7872 expressions out into temporary variables so that walk_tree doesn't
7873 step into them (c++/15764). */
7876 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
7878 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
7879 tree expr
= *expr_p
;
7880 if (TREE_CODE (expr
) == SAVE_EXPR
)
7882 tree op
= TREE_OPERAND (expr
, 0);
7883 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
7884 if (TREE_SIDE_EFFECTS (op
))
7885 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
7888 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
7893 /* Entry point for the above. */
7896 stabilize_vla_size (tree size
)
7898 struct pointer_set_t
*pset
= pointer_set_create ();
7899 /* Break out any function calls into temporary variables. */
7900 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
7903 /* Given the SIZE (i.e., number of elements) in an array, compute an
7904 appropriate index type for the array. If non-NULL, NAME is the
7905 name of the thing being declared. */
7908 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
7913 tree abi_1_itype
= NULL_TREE
;
7915 if (error_operand_p (size
))
7916 return error_mark_node
;
7918 type
= TREE_TYPE (size
);
7919 /* type_dependent_expression_p? */
7920 if (!dependent_type_p (type
))
7922 mark_rvalue_use (size
);
7924 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
7925 && TREE_SIDE_EFFECTS (size
))
7926 /* In C++98, we mark a non-constant array bound with a magic
7927 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7930 size
= fold_non_dependent_expr (size
);
7932 if (CLASS_TYPE_P (type
)
7933 && CLASSTYPE_LITERAL_P (type
))
7935 size
= build_expr_type_conversion (WANT_INT
, size
, true);
7938 if (!(complain
& tf_error
))
7939 return error_mark_node
;
7941 error ("size of array %qD has non-integral type %qT",
7944 error ("size of array has non-integral type %qT", type
);
7945 size
= integer_one_node
;
7947 if (size
== error_mark_node
)
7948 return error_mark_node
;
7949 type
= TREE_TYPE (size
);
7950 /* We didn't support this case in GCC 3.2, so don't bother
7951 trying to model it now in ABI v1. */
7952 abi_1_itype
= error_mark_node
;
7955 size
= maybe_constant_value (size
);
7956 if (!TREE_CONSTANT (size
))
7960 if (error_operand_p (size
))
7961 return error_mark_node
;
7963 /* The array bound must be an integer type. */
7964 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7966 if (!(complain
& tf_error
))
7967 return error_mark_node
;
7969 error ("size of array %qD has non-integral type %qT", name
, type
);
7971 error ("size of array has non-integral type %qT", type
);
7972 size
= integer_one_node
;
7973 type
= TREE_TYPE (size
);
7977 /* A type is dependent if it is...an array type constructed from any
7978 dependent type or whose size is specified by a constant expression
7979 that is value-dependent. */
7980 /* We can only call value_dependent_expression_p on integral constant
7981 expressions; treat non-constant expressions as dependent, too. */
7982 if (processing_template_decl
7983 && (dependent_type_p (type
)
7984 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
7986 /* We cannot do any checking for a SIZE that isn't known to be
7987 constant. Just build the index type and mark that it requires
7988 structural equality checks. */
7989 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7990 size
, integer_one_node
));
7991 TYPE_DEPENDENT_P (itype
) = 1;
7992 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7993 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7997 if (!abi_version_at_least (2) && processing_template_decl
7998 && abi_1_itype
== NULL_TREE
)
7999 /* For abi-1, we handled all instances in templates the same way,
8000 even when they were non-dependent. This affects the manglings
8001 produced. So, we do the normal checking for non-dependent
8002 sizes, but at the end we'll return the same type that abi-1
8003 would have, but with TYPE_CANONICAL set to the "right"
8004 value that the current ABI would provide. */
8005 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8006 osize
, integer_one_node
));
8008 /* Normally, the array-bound will be a constant. */
8009 if (TREE_CODE (size
) == INTEGER_CST
)
8011 /* Check to see if the array bound overflowed. Make that an
8012 error, no matter how generous we're being. */
8013 constant_expression_error (size
);
8015 /* An array must have a positive number of elements. */
8016 if (INT_CST_LT (size
, integer_zero_node
))
8018 if (!(complain
& tf_error
))
8019 return error_mark_node
;
8021 error ("size of array %qD is negative", name
);
8023 error ("size of array is negative");
8024 size
= integer_one_node
;
8026 /* As an extension we allow zero-sized arrays. */
8027 else if (integer_zerop (size
))
8029 if (!(complain
& tf_error
))
8030 /* We must fail if performing argument deduction (as
8031 indicated by the state of complain), so that
8032 another substitution can be found. */
8033 return error_mark_node
;
8034 else if (in_system_header
)
8035 /* Allow them in system headers because glibc uses them. */;
8037 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
8039 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
8042 else if (TREE_CONSTANT (size
)
8043 /* We don't allow VLAs at non-function scopes, or during
8044 tentative template substitution. */
8045 || !at_function_scope_p () || !(complain
& tf_error
))
8047 if (!(complain
& tf_error
))
8048 return error_mark_node
;
8049 /* `(int) &fn' is not a valid array bound. */
8051 error ("size of array %qD is not an integral constant-expression",
8054 error ("size of array is not an integral constant-expression");
8055 size
= integer_one_node
;
8057 else if (pedantic
&& warn_vla
!= 0)
8060 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8062 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8064 else if (warn_vla
> 0)
8068 "variable length array %qD is used", name
);
8071 "variable length array is used");
8074 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8075 /* A variable sized array. */
8076 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8079 HOST_WIDE_INT saved_processing_template_decl
;
8081 /* Compute the index of the largest element in the array. It is
8082 one less than the number of elements in the array. We save
8083 and restore PROCESSING_TEMPLATE_DECL so that computations in
8084 cp_build_binary_op will be appropriately folded. */
8085 saved_processing_template_decl
= processing_template_decl
;
8086 processing_template_decl
= 0;
8087 itype
= cp_build_binary_op (input_location
,
8089 cp_convert (ssizetype
, size
),
8090 cp_convert (ssizetype
, integer_one_node
),
8091 tf_warning_or_error
);
8092 itype
= fold (itype
);
8093 processing_template_decl
= saved_processing_template_decl
;
8095 if (!TREE_CONSTANT (itype
))
8096 /* A variable sized array. */
8097 itype
= variable_size (itype
);
8098 /* Make sure that there was no overflow when creating to a signed
8099 index type. (For example, on a 32-bit machine, an array with
8100 size 2^32 - 1 is too big.) */
8101 else if (TREE_CODE (itype
) == INTEGER_CST
8102 && TREE_OVERFLOW (itype
))
8104 if (!(complain
& tf_error
))
8105 return error_mark_node
;
8106 error ("overflow in array dimension");
8107 TREE_OVERFLOW (itype
) = 0;
8111 /* Create and return the appropriate index type. */
8112 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8114 tree t
= build_index_type (itype
);
8115 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8116 itype
= abi_1_itype
;
8119 itype
= build_index_type (itype
);
8121 /* If the index type were dependent, we would have returned early, so
8122 remember that it isn't. */
8123 TYPE_DEPENDENT_P (itype
) = 0;
8124 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8128 /* Returns the scope (if any) in which the entity declared by
8129 DECLARATOR will be located. If the entity was declared with an
8130 unqualified name, NULL_TREE is returned. */
8133 get_scope_of_declarator (const cp_declarator
*declarator
)
8135 while (declarator
&& declarator
->kind
!= cdk_id
)
8136 declarator
= declarator
->declarator
;
8138 /* If the declarator-id is a SCOPE_REF, the scope in which the
8139 declaration occurs is the first operand. */
8141 && declarator
->u
.id
.qualifying_scope
)
8142 return declarator
->u
.id
.qualifying_scope
;
8144 /* Otherwise, the declarator is not a qualified name; the entity will
8145 be declared in the current scope. */
8149 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8150 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8154 create_array_type_for_decl (tree name
, tree type
, tree size
)
8156 tree itype
= NULL_TREE
;
8158 /* If things have already gone awry, bail now. */
8159 if (type
== error_mark_node
|| size
== error_mark_node
)
8160 return error_mark_node
;
8162 /* 8.3.4/1: If the type of the identifier of D contains the auto
8163 type-specifier, the program is ill-formed. */
8164 if (pedantic
&& type_uses_auto (type
))
8165 pedwarn (input_location
, OPT_pedantic
,
8166 "declaration of %qD as array of %<auto%>", name
);
8168 /* If there are some types which cannot be array elements,
8169 issue an error-message and return. */
8170 switch (TREE_CODE (type
))
8174 error ("declaration of %qD as array of void", name
);
8176 error ("creating array of void");
8177 return error_mark_node
;
8181 error ("declaration of %qD as array of functions", name
);
8183 error ("creating array of functions");
8184 return error_mark_node
;
8186 case REFERENCE_TYPE
:
8188 error ("declaration of %qD as array of references", name
);
8190 error ("creating array of references");
8191 return error_mark_node
;
8195 error ("declaration of %qD as array of function members", name
);
8197 error ("creating array of function members");
8198 return error_mark_node
;
8206 The constant expressions that specify the bounds of the arrays
8207 can be omitted only for the first member of the sequence. */
8208 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8211 error ("declaration of %qD as multidimensional array must "
8212 "have bounds for all dimensions except the first",
8215 error ("multidimensional array must have bounds for all "
8216 "dimensions except the first");
8218 return error_mark_node
;
8221 /* Figure out the index type for the array. */
8223 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8226 T is called the array element type; this type shall not be [...] an
8227 abstract class type. */
8228 abstract_virtuals_error (name
, type
);
8230 return build_cplus_array_type (type
, itype
);
8233 /* Check that it's OK to declare a function with the indicated TYPE.
8234 SFK indicates the kind of special function (if any) that this
8235 function is. OPTYPE is the type given in a conversion operator
8236 declaration, or the class type for a constructor/destructor.
8237 Returns the actual return type of the function; that
8238 may be different than TYPE if an error occurs, or for certain
8239 special functions. */
8242 check_special_function_return_type (special_function_kind sfk
,
8248 case sfk_constructor
:
8250 error ("return type specification for constructor invalid");
8252 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8253 type
= build_pointer_type (optype
);
8255 type
= void_type_node
;
8258 case sfk_destructor
:
8260 error ("return type specification for destructor invalid");
8261 /* We can't use the proper return type here because we run into
8262 problems with ambiguous bases and covariant returns.
8263 Java classes are left unchanged because (void *) isn't a valid
8264 Java type, and we don't want to change the Java ABI. */
8265 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8266 type
= build_pointer_type (void_type_node
);
8268 type
= void_type_node
;
8271 case sfk_conversion
:
8273 error ("return type specified for %<operator %T%>", optype
);
8284 /* A variable or data member (whose unqualified name is IDENTIFIER)
8285 has been declared with the indicated TYPE. If the TYPE is not
8286 acceptable, issue an error message and return a type to use for
8287 error-recovery purposes. */
8290 check_var_type (tree identifier
, tree type
)
8292 if (VOID_TYPE_P (type
))
8295 error ("unnamed variable or field declared void");
8296 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8298 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8299 error ("variable or field %qE declared void", identifier
);
8302 error ("variable or field declared void");
8303 type
= error_mark_node
;
8309 /* Given declspecs and a declarator (abstract or otherwise), determine
8310 the name and type of the object declared and construct a DECL node
8313 DECLSPECS points to the representation of declaration-specifier
8314 sequence that precedes declarator.
8316 DECL_CONTEXT says which syntactic context this declaration is in:
8317 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8318 FUNCDEF for a function definition. Like NORMAL but a few different
8319 error messages in each case. Return value may be zero meaning
8320 this definition is too screwy to try to parse.
8321 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8322 handle member functions (which have FIELD context).
8323 Return value may be zero meaning this definition is too screwy to
8325 PARM for a parameter declaration (either within a function prototype
8326 or before a function body). Make a PARM_DECL, or return void_type_node.
8327 TPARM for a template parameter declaration.
8328 CATCHPARM for a parameter declaration before a catch clause.
8329 TYPENAME if for a typename (in a cast or sizeof).
8330 Don't make a DECL node; just return the ..._TYPE node.
8331 FIELD for a struct or union field; make a FIELD_DECL.
8332 BITFIELD for a field with specified width.
8334 INITIALIZED is as for start_decl.
8336 ATTRLIST is a pointer to the list of attributes, which may be NULL
8337 if there are none; *ATTRLIST may be modified if attributes from inside
8338 the declarator should be applied to the declaration.
8340 When this function is called, scoping variables (such as
8341 CURRENT_CLASS_TYPE) should reflect the scope in which the
8342 declaration occurs, not the scope in which the new declaration will
8343 be placed. For example, on:
8347 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8350 Returns a DECL (if a declarator is present), a TYPE (if there is no
8351 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8355 grokdeclarator (const cp_declarator
*declarator
,
8356 const cp_decl_specifier_seq
*declspecs
,
8357 enum decl_context decl_context
,
8361 tree type
= NULL_TREE
;
8363 int explicit_int128
= 0;
8364 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8365 int explicit_int
= 0;
8366 int explicit_char
= 0;
8367 int defaulted_int
= 0;
8368 tree dependent_name
= NULL_TREE
;
8370 tree typedef_decl
= NULL_TREE
;
8371 const char *name
= NULL
;
8372 tree typedef_type
= NULL_TREE
;
8373 /* True if this declarator is a function definition. */
8374 bool funcdef_flag
= false;
8375 cp_declarator_kind innermost_code
= cdk_error
;
8378 /* See the code below that used this. */
8379 tree decl_attr
= NULL_TREE
;
8382 /* Keep track of what sort of function is being processed
8383 so that we can warn about default return values, or explicit
8384 return values which do not match prescribed defaults. */
8385 special_function_kind sfk
= sfk_none
;
8387 tree dname
= NULL_TREE
;
8388 tree ctor_return_type
= NULL_TREE
;
8389 enum overload_flags flags
= NO_SPECIAL
;
8390 /* cv-qualifiers that apply to the declarator, for a declaration of
8391 a member function. */
8392 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8393 /* virt-specifiers that apply to the declarator, for a declaration of
8394 a member function. */
8395 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8396 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8398 tree raises
= NULL_TREE
;
8399 int template_count
= 0;
8400 tree returned_attrs
= NULL_TREE
;
8401 tree parms
= NULL_TREE
;
8402 const cp_declarator
*id_declarator
;
8403 /* The unqualified name of the declarator; either an
8404 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8405 tree unqualified_id
;
8406 /* The class type, if any, in which this entity is located,
8407 or NULL_TREE if none. Note that this value may be different from
8408 the current class type; for example if an attempt is made to declare
8409 "A::f" inside "B", this value will be "A". */
8410 tree ctype
= current_class_type
;
8411 /* The NAMESPACE_DECL for the namespace in which this entity is
8412 located. If an unqualified name is used to declare the entity,
8413 this value will be NULL_TREE, even if the entity is located at
8415 tree in_namespace
= NULL_TREE
;
8416 cp_storage_class storage_class
;
8417 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8418 bool type_was_error_mark_node
= false;
8419 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8420 bool template_type_arg
= false;
8421 bool template_parm_flag
= false;
8422 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
8425 signed_p
= declspecs
->specs
[(int)ds_signed
];
8426 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
8427 short_p
= declspecs
->specs
[(int)ds_short
];
8428 long_p
= declspecs
->specs
[(int)ds_long
];
8429 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
8430 explicit_int128
= declspecs
->explicit_int128_p
;
8431 thread_p
= declspecs
->specs
[(int)ds_thread
];
8433 if (decl_context
== FUNCDEF
)
8434 funcdef_flag
= true, decl_context
= NORMAL
;
8435 else if (decl_context
== MEMFUNCDEF
)
8436 funcdef_flag
= true, decl_context
= FIELD
;
8437 else if (decl_context
== BITFIELD
)
8438 bitfield
= 1, decl_context
= FIELD
;
8439 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8440 template_type_arg
= true, decl_context
= TYPENAME
;
8441 else if (decl_context
== TPARM
)
8442 template_parm_flag
= true, decl_context
= PARM
;
8444 if (initialized
> 1)
8445 funcdef_flag
= true;
8447 /* Look inside a declarator for the name being declared
8448 and get it as a string, for an error message. */
8449 for (id_declarator
= declarator
;
8451 id_declarator
= id_declarator
->declarator
)
8453 if (id_declarator
->kind
!= cdk_id
)
8454 innermost_code
= id_declarator
->kind
;
8456 switch (id_declarator
->kind
)
8459 if (id_declarator
->declarator
8460 && id_declarator
->declarator
->kind
== cdk_id
)
8462 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8463 if (sfk
== sfk_destructor
)
8470 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8471 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8474 if (qualifying_scope
)
8476 if (at_function_scope_p ())
8480 A declarator-id shall not be qualified except
8483 None of the cases are permitted in block
8485 if (qualifying_scope
== global_namespace
)
8486 error ("invalid use of qualified-name %<::%D%>",
8488 else if (TYPE_P (qualifying_scope
))
8489 error ("invalid use of qualified-name %<%T::%D%>",
8490 qualifying_scope
, decl
);
8492 error ("invalid use of qualified-name %<%D::%D%>",
8493 qualifying_scope
, decl
);
8494 return error_mark_node
;
8496 else if (TYPE_P (qualifying_scope
))
8498 ctype
= qualifying_scope
;
8499 if (!MAYBE_CLASS_TYPE_P (ctype
))
8501 error ("%q#T is not a class or a namespace", ctype
);
8504 else if (innermost_code
!= cdk_function
8505 && current_class_type
8506 && !UNIQUELY_DERIVED_FROM_P (ctype
,
8507 current_class_type
))
8509 error ("type %qT is not derived from type %qT",
8510 ctype
, current_class_type
);
8511 return error_mark_node
;
8514 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8515 in_namespace
= qualifying_scope
;
8517 switch (TREE_CODE (decl
))
8523 if (innermost_code
!= cdk_function
)
8525 error ("declaration of %qD as non-function", decl
);
8526 return error_mark_node
;
8528 else if (!qualifying_scope
8529 && !(current_class_type
&& at_class_scope_p ()))
8531 error ("declaration of %qD as non-member", decl
);
8532 return error_mark_node
;
8535 type
= TREE_OPERAND (decl
, 0);
8537 type
= constructor_name (type
);
8538 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8543 case TEMPLATE_ID_EXPR
:
8545 tree fns
= TREE_OPERAND (decl
, 0);
8548 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8550 gcc_assert (is_overloaded_fn (dname
));
8551 dname
= DECL_NAME (get_first_fn (dname
));
8556 case IDENTIFIER_NODE
:
8557 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8560 if (C_IS_RESERVED_WORD (dname
))
8562 error ("declarator-id missing; using reserved word %qD",
8564 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8566 else if (!IDENTIFIER_TYPENAME_P (dname
))
8567 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8570 gcc_assert (flags
== NO_SPECIAL
);
8571 flags
= TYPENAME_FLAG
;
8572 ctor_return_type
= TREE_TYPE (dname
);
8573 sfk
= sfk_conversion
;
8574 if (is_typename_at_global_scope (dname
))
8575 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8577 name
= "<invalid operator>";
8594 return error_mark_node
;
8599 if (id_declarator
->kind
== cdk_id
)
8605 The declarator in a function-definition shall have the form
8606 D1 ( parameter-declaration-clause) ... */
8607 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8609 error ("function definition does not declare parameters");
8610 return error_mark_node
;
8613 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8614 && innermost_code
!= cdk_function
8615 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8617 error ("declaration of %qD as non-function", dname
);
8618 return error_mark_node
;
8622 && TREE_CODE (dname
) == IDENTIFIER_NODE
8623 && UDLIT_OPER_P (dname
)
8624 && innermost_code
!= cdk_function
)
8626 error ("declaration of %qD as non-function", dname
);
8627 return error_mark_node
;
8630 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8632 if (declspecs
->specs
[(int)ds_typedef
])
8634 error ("declaration of %qD as %<typedef%>", dname
);
8635 return error_mark_node
;
8637 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8639 error ("declaration of %qD as parameter", dname
);
8640 return error_mark_node
;
8644 /* Anything declared one level down from the top level
8645 must be one of the parameters of a function
8646 (because the body is at least two levels down). */
8648 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8649 by not allowing C++ class definitions to specify their parameters
8650 with xdecls (must be spec.d in the parmlist).
8652 Since we now wait to push a class scope until we are sure that
8653 we are in a legitimate method context, we must set oldcname
8654 explicitly (since current_class_name is not yet alive).
8656 We also want to avoid calling this a PARM if it is in a namespace. */
8658 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8660 cp_binding_level
*b
= current_binding_level
;
8661 current_binding_level
= b
->level_chain
;
8662 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8663 decl_context
= PARM
;
8664 current_binding_level
= b
;
8668 name
= decl_context
== PARM
? "parameter" : "type name";
8670 if (constexpr_p
&& declspecs
->specs
[(int)ds_typedef
])
8672 error ("%<constexpr%> cannot appear in a typedef declaration");
8673 return error_mark_node
;
8676 /* If there were multiple types specified in the decl-specifier-seq,
8677 issue an error message. */
8678 if (declspecs
->multiple_types_p
)
8680 error ("two or more data types in declaration of %qs", name
);
8681 return error_mark_node
;
8684 if (declspecs
->conflicting_specifiers_p
)
8686 error ("conflicting specifiers in declaration of %qs", name
);
8687 return error_mark_node
;
8690 /* Extract the basic type from the decl-specifier-seq. */
8691 type
= declspecs
->type
;
8692 if (type
== error_mark_node
)
8695 type_was_error_mark_node
= true;
8697 /* If the entire declaration is itself tagged as deprecated then
8698 suppress reports of deprecated items. */
8699 if (type
&& TREE_DEPRECATED (type
)
8700 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8701 warn_deprecated_use (type
, NULL_TREE
);
8702 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8704 typedef_decl
= type
;
8705 type
= TREE_TYPE (typedef_decl
);
8706 if (TREE_DEPRECATED (type
)
8707 && DECL_ARTIFICIAL (typedef_decl
)
8708 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8709 warn_deprecated_use (type
, NULL_TREE
);
8711 /* No type at all: default to `int', and set DEFAULTED_INT
8712 because it was not a user-defined typedef. */
8713 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8715 /* These imply 'int'. */
8716 type
= integer_type_node
;
8720 explicit_int
= declspecs
->explicit_int_p
;
8721 explicit_char
= declspecs
->explicit_char_p
;
8724 /* See the code below that used this. */
8726 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8728 typedef_type
= type
;
8731 if (sfk
!= sfk_conversion
)
8732 ctor_return_type
= ctype
;
8734 if (sfk
!= sfk_none
)
8735 type
= check_special_function_return_type (sfk
, type
,
8737 else if (type
== NULL_TREE
)
8743 /* We handle `main' specially here, because 'main () { }' is so
8744 common. With no options, it is allowed. With -Wreturn-type,
8745 it is a warning. It is only an error with -pedantic-errors. */
8746 is_main
= (funcdef_flag
8747 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8748 && MAIN_NAME_P (dname
)
8749 && ctype
== NULL_TREE
8750 && in_namespace
== NULL_TREE
8751 && current_namespace
== global_namespace
);
8753 if (type_was_error_mark_node
)
8754 /* We've already issued an error, don't complain more. */;
8755 else if (in_system_header
|| flag_ms_extensions
)
8756 /* Allow it, sigh. */;
8758 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8760 pedwarn (input_location
, OPT_pedantic
,
8761 "ISO C++ forbids declaration of %qs with no type", name
);
8763 warning (OPT_Wreturn_type
,
8764 "ISO C++ forbids declaration of %qs with no type", name
);
8766 type
= integer_type_node
;
8771 if (explicit_int128
)
8773 if (int128_integer_type_node
== NULL_TREE
)
8775 error ("%<__int128%> is not supported by this target");
8776 explicit_int128
= false;
8778 else if (pedantic
&& ! in_system_header
)
8779 pedwarn (input_location
, OPT_pedantic
,
8780 "ISO C++ does not support %<__int128%> for %qs", name
);
8783 /* Now process the modifiers that were specified
8784 and check for invalid combinations. */
8786 /* Long double is a special combination. */
8787 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8790 type
= cp_build_qualified_type (long_double_type_node
,
8791 cp_type_quals (type
));
8794 /* Check all other uses of type modifiers. */
8796 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8800 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8801 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8802 else if (signed_p
&& unsigned_p
)
8803 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8804 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8805 error ("%<long long%> invalid for %qs", name
);
8806 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8807 error ("%<long%> invalid for %qs", name
);
8808 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8809 error ("%<short%> invalid for %qs", name
);
8810 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8811 error ("%<long%> or %<short%> invalid for %qs", name
);
8812 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8813 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8814 else if ((long_p
|| short_p
) && explicit_char
)
8815 error ("%<long%> or %<short%> specified with char for %qs", name
);
8816 else if (long_p
&& short_p
)
8817 error ("%<long%> and %<short%> specified together for %qs", name
);
8818 else if (type
== char16_type_node
|| type
== char32_type_node
)
8820 if (signed_p
|| unsigned_p
)
8821 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8822 else if (short_p
|| long_p
)
8823 error ("%<short%> or %<long%> invalid for %qs", name
);
8828 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8830 pedwarn (input_location
, OPT_pedantic
,
8831 "long, short, signed or unsigned used invalidly for %qs",
8833 if (flag_pedantic_errors
)
8838 /* Discard the type modifiers if they are invalid. */
8849 /* Decide whether an integer type is signed or not.
8850 Optionally treat bitfields as signed by default. */
8854 It is implementation-defined whether a plain (neither
8855 explicitly signed or unsigned) char, short, int, or long
8856 bit-field is signed or unsigned.
8858 Naturally, we extend this to long long as well. Note that
8859 this does not include wchar_t. */
8860 || (bitfield
&& !flag_signed_bitfields
8862 /* A typedef for plain `int' without `signed' can be
8863 controlled just like plain `int', but a typedef for
8864 `signed int' cannot be so controlled. */
8866 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8867 && TREE_CODE (type
) == INTEGER_TYPE
8868 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8870 if (explicit_int128
)
8871 type
= int128_unsigned_type_node
;
8873 type
= long_long_unsigned_type_node
;
8875 type
= long_unsigned_type_node
;
8877 type
= short_unsigned_type_node
;
8878 else if (type
== char_type_node
)
8879 type
= unsigned_char_type_node
;
8880 else if (typedef_decl
)
8881 type
= unsigned_type_for (type
);
8883 type
= unsigned_type_node
;
8885 else if (signed_p
&& type
== char_type_node
)
8886 type
= signed_char_type_node
;
8887 else if (explicit_int128
)
8888 type
= int128_integer_type_node
;
8890 type
= long_long_integer_type_node
;
8892 type
= long_integer_type_node
;
8894 type
= short_integer_type_node
;
8896 if (declspecs
->specs
[(int)ds_complex
])
8898 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8899 error ("complex invalid for %qs", name
);
8900 /* If we just have "complex", it is equivalent to
8901 "complex double", but if any modifiers at all are specified it is
8902 the complex form of TYPE. E.g, "complex short" is
8903 "complex short int". */
8904 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8905 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8906 type
= complex_double_type_node
;
8907 else if (type
== integer_type_node
)
8908 type
= complex_integer_type_node
;
8909 else if (type
== float_type_node
)
8910 type
= complex_float_type_node
;
8911 else if (type
== double_type_node
)
8912 type
= complex_double_type_node
;
8913 else if (type
== long_double_type_node
)
8914 type
= complex_long_double_type_node
;
8916 type
= build_complex_type (type
);
8919 type_quals
= TYPE_UNQUALIFIED
;
8920 if (declspecs
->specs
[(int)ds_const
])
8921 type_quals
|= TYPE_QUAL_CONST
;
8922 if (declspecs
->specs
[(int)ds_volatile
])
8923 type_quals
|= TYPE_QUAL_VOLATILE
;
8924 if (declspecs
->specs
[(int)ds_restrict
])
8925 type_quals
|= TYPE_QUAL_RESTRICT
;
8926 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8927 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8930 type_quals
|= cp_type_quals (type
);
8931 type
= cp_build_qualified_type_real
8932 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8933 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8934 /* We might have ignored or rejected some of the qualifiers. */
8935 type_quals
= cp_type_quals (type
);
8938 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8939 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8940 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8942 storage_class
= declspecs
->storage_class
;
8943 if (storage_class
== sc_static
)
8944 staticp
= 1 + (decl_context
== FIELD
);
8946 if (virtualp
&& staticp
== 2)
8948 error ("member %qD cannot be declared both virtual and static", dname
);
8949 storage_class
= sc_none
;
8952 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8954 if (dependent_name
&& !friendp
)
8956 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8957 return error_mark_node
;
8960 /* Issue errors about use of storage classes for parameters. */
8961 if (decl_context
== PARM
)
8963 if (declspecs
->specs
[(int)ds_typedef
])
8965 error ("typedef declaration invalid in parameter declaration");
8966 return error_mark_node
;
8968 else if (template_parm_flag
&& storage_class
!= sc_none
)
8970 error ("storage class specified for template parameter %qs", name
);
8971 return error_mark_node
;
8973 else if (storage_class
== sc_static
8974 || storage_class
== sc_extern
8976 error ("storage class specifiers invalid in parameter declarations");
8978 /* Function parameters cannot be constexpr. If we saw one, moan
8979 and pretend it wasn't there. */
8982 error ("a parameter cannot be declared %<constexpr%>");
8987 /* Give error if `virtual' is used outside of class declaration. */
8989 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8991 error ("%<virtual%> outside class declaration");
8995 /* Static anonymous unions are dealt with here. */
8996 if (staticp
&& decl_context
== TYPENAME
8998 && ANON_AGGR_TYPE_P (declspecs
->type
))
8999 decl_context
= FIELD
;
9001 /* Warn about storage classes that are invalid for certain
9002 kinds of declarations (parameters, typenames, etc.). */
9005 && storage_class
!= sc_extern
9006 && storage_class
!= sc_static
)
9007 || declspecs
->specs
[(int)ds_typedef
]))
9009 error ("multiple storage classes in declaration of %qs", name
);
9012 if (decl_context
!= NORMAL
9013 && ((storage_class
!= sc_none
9014 && storage_class
!= sc_mutable
)
9017 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9018 && (storage_class
== sc_register
9019 || storage_class
== sc_auto
))
9021 else if (declspecs
->specs
[(int)ds_typedef
])
9023 else if (decl_context
== FIELD
9024 /* C++ allows static class elements. */
9025 && storage_class
== sc_static
)
9026 /* C++ also allows inlines and signed and unsigned elements,
9027 but in those cases we don't come in here. */
9031 if (decl_context
== FIELD
)
9032 error ("storage class specified for %qs", name
);
9035 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9036 error ("storage class specified for parameter %qs", name
);
9038 error ("storage class specified for typename");
9040 if (storage_class
== sc_register
9041 || storage_class
== sc_auto
9042 || storage_class
== sc_extern
9044 storage_class
= sc_none
;
9047 else if (storage_class
== sc_extern
&& funcdef_flag
9048 && ! toplevel_bindings_p ())
9049 error ("nested function %qs declared %<extern%>", name
);
9050 else if (toplevel_bindings_p ())
9052 if (storage_class
== sc_auto
)
9053 error ("top-level declaration of %qs specifies %<auto%>", name
);
9056 && storage_class
!= sc_extern
9057 && storage_class
!= sc_static
)
9059 error ("function-scope %qs implicitly auto and declared %<__thread%>",
9064 if (storage_class
&& friendp
)
9066 error ("storage class specifiers invalid in friend function declarations");
9067 storage_class
= sc_none
;
9072 unqualified_id
= NULL_TREE
;
9075 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9076 switch (TREE_CODE (unqualified_id
))
9079 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9080 if (TYPE_P (unqualified_id
))
9081 unqualified_id
= constructor_name (unqualified_id
);
9084 case IDENTIFIER_NODE
:
9085 case TEMPLATE_ID_EXPR
:
9093 /* Determine the type of the entity declared by recurring on the
9095 for (; declarator
; declarator
= declarator
->declarator
)
9097 const cp_declarator
*inner_declarator
;
9100 if (type
== error_mark_node
)
9101 return error_mark_node
;
9103 attrs
= declarator
->attributes
;
9109 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9110 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9111 if (declarator
->kind
== cdk_function
)
9112 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9113 if (declarator
->kind
== cdk_array
)
9114 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9115 returned_attrs
= decl_attributes (&type
,
9116 chainon (returned_attrs
, attrs
),
9120 if (declarator
->kind
== cdk_id
)
9123 inner_declarator
= declarator
->declarator
;
9125 switch (declarator
->kind
)
9128 type
= create_array_type_for_decl (dname
, type
,
9129 declarator
->u
.array
.bounds
);
9137 /* Declaring a function type.
9138 Make sure we have a valid type for the function to return. */
9140 if (type_quals
!= TYPE_UNQUALIFIED
)
9142 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9143 warning (OPT_Wignored_qualifiers
,
9144 "type qualifiers ignored on function return type");
9145 /* We now know that the TYPE_QUALS don't apply to the
9146 decl, but to its return type. */
9147 type_quals
= TYPE_UNQUALIFIED
;
9149 errmsg
= targetm
.invalid_return_type (type
);
9153 type
= integer_type_node
;
9156 /* Error about some types functions can't return. */
9158 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9160 error ("%qs declared as function returning a function", name
);
9161 return error_mark_node
;
9163 if (TREE_CODE (type
) == ARRAY_TYPE
)
9165 error ("%qs declared as function returning an array", name
);
9166 return error_mark_node
;
9169 /* Pick up type qualifiers which should be applied to `this'. */
9170 memfn_quals
= declarator
->u
.function
.qualifiers
;
9171 /* Pick up virt-specifiers. */
9172 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9173 /* Pick up the exception specifications. */
9174 raises
= declarator
->u
.function
.exception_specification
;
9175 /* If the exception-specification is ill-formed, let's pretend
9176 there wasn't one. */
9177 if (raises
== error_mark_node
)
9180 /* Say it's a definition only for the CALL_EXPR
9181 closest to the identifier. */
9182 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9184 /* Handle a late-specified return type. */
9187 if (type_uses_auto (type
))
9189 if (!declarator
->u
.function
.late_return_type
)
9191 error ("%qs function uses %<auto%> type specifier without"
9192 " trailing return type", name
);
9193 return error_mark_node
;
9195 else if (!is_auto (type
))
9197 error ("%qs function with trailing return type has"
9198 " %qT as its type rather than plain %<auto%>",
9200 return error_mark_node
;
9203 else if (declarator
->u
.function
.late_return_type
)
9205 if (cxx_dialect
< cxx0x
)
9206 /* Not using maybe_warn_cpp0x because this should
9207 always be an error. */
9208 error ("trailing return type only available with "
9209 "-std=c++11 or -std=gnu++11");
9211 error ("%qs function with trailing return type not "
9212 "declared with %<auto%> type specifier", name
);
9213 return error_mark_node
;
9216 type
= splice_late_return_type
9217 (type
, declarator
->u
.function
.late_return_type
);
9218 if (type
== error_mark_node
)
9219 return error_mark_node
;
9221 if (ctype
== NULL_TREE
9222 && decl_context
== FIELD
9224 && (friendp
== 0 || dname
== current_class_name
))
9225 ctype
= current_class_type
;
9227 if (ctype
&& (sfk
== sfk_constructor
9228 || sfk
== sfk_destructor
))
9230 /* We are within a class's scope. If our declarator name
9231 is the same as the class name, and we are defining
9232 a function, then it is a constructor/destructor, and
9233 therefore returns a void type. */
9235 /* ISO C++ 12.4/2. A destructor may not be declared
9236 const or volatile. A destructor may not be
9239 ISO C++ 12.1. A constructor may not be declared
9240 const or volatile. A constructor may not be
9241 virtual. A constructor may not be static. */
9243 error ((flags
== DTOR_FLAG
)
9244 ? G_("destructor cannot be static member function")
9245 : G_("constructor cannot be static member function"));
9248 error ((flags
== DTOR_FLAG
)
9249 ? G_("destructors may not be cv-qualified")
9250 : G_("constructors may not be cv-qualified"));
9251 memfn_quals
= TYPE_UNQUALIFIED
;
9254 if (decl_context
== FIELD
9255 && !member_function_or_else (ctype
,
9258 return error_mark_node
;
9260 if (flags
!= DTOR_FLAG
)
9262 /* It's a constructor. */
9267 permerror (input_location
, "constructors cannot be declared virtual");
9270 if (decl_context
== FIELD
9271 && sfk
!= sfk_constructor
)
9272 return error_mark_node
;
9274 if (decl_context
== FIELD
)
9280 error ("can%'t initialize friend function %qs", name
);
9283 /* Cannot be both friend and virtual. */
9284 error ("virtual functions cannot be friends");
9287 if (decl_context
== NORMAL
)
9288 error ("friend declaration not in class definition");
9289 if (current_function_decl
&& funcdef_flag
)
9290 error ("can%'t define friend function %qs in a local "
9294 else if (ctype
&& sfk
== sfk_conversion
)
9298 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9303 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9306 if (inner_declarator
9307 && inner_declarator
->kind
== cdk_id
9308 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9309 && arg_types
!= void_list_node
)
9311 error ("destructors may not have parameters");
9312 arg_types
= void_list_node
;
9316 type
= build_function_type (type
, arg_types
);
9323 /* Filter out pointers-to-references and references-to-references.
9324 We can get these if a TYPE_DECL is used. */
9326 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9328 if (declarator
->kind
!= cdk_reference
)
9330 error ("cannot declare pointer to %q#T", type
);
9331 type
= TREE_TYPE (type
);
9334 /* In C++0x, we allow reference to reference declarations
9335 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9336 and template type arguments [14.3.1/4 temp.arg.type]. The
9337 check for direct reference to reference declarations, which
9338 are still forbidden, occurs below. Reasoning behind the change
9339 can be found in DR106, DR540, and the rvalue reference
9341 else if (cxx_dialect
== cxx98
)
9343 error ("cannot declare reference to %q#T", type
);
9344 type
= TREE_TYPE (type
);
9347 else if (VOID_TYPE_P (type
))
9349 if (declarator
->kind
== cdk_reference
)
9350 error ("cannot declare reference to %q#T", type
);
9351 else if (declarator
->kind
== cdk_ptrmem
)
9352 error ("cannot declare pointer to %q#T member", type
);
9355 /* We now know that the TYPE_QUALS don't apply to the decl,
9356 but to the target of the pointer. */
9357 type_quals
= TYPE_UNQUALIFIED
;
9359 if (declarator
->kind
== cdk_ptrmem
9360 && (TREE_CODE (type
) == FUNCTION_TYPE
9361 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9363 memfn_quals
|= type_memfn_quals (type
);
9364 type
= build_memfn_type (type
,
9365 declarator
->u
.pointer
.class_type
,
9367 if (type
== error_mark_node
)
9368 return error_mark_node
;
9369 memfn_quals
= TYPE_UNQUALIFIED
;
9372 if (TREE_CODE (type
) == FUNCTION_TYPE
9373 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9374 error (declarator
->kind
== cdk_reference
9375 ? G_("cannot declare reference to qualified function type %qT")
9376 : G_("cannot declare pointer to qualified function type %qT"),
9379 /* When the pointed-to type involves components of variable size,
9380 care must be taken to ensure that the size evaluation code is
9381 emitted early enough to dominate all the possible later uses
9382 and late enough for the variables on which it depends to have
9385 This is expected to happen automatically when the pointed-to
9386 type has a name/declaration of it's own, but special attention
9387 is required if the type is anonymous.
9389 We handle the NORMAL and FIELD contexts here by inserting a
9390 dummy statement that just evaluates the size at a safe point
9391 and ensures it is not deferred until e.g. within a deeper
9392 conditional context (c++/43555).
9394 We expect nothing to be needed here for PARM or TYPENAME.
9395 Evaluating the size at this point for TYPENAME would
9396 actually be incorrect, as we might be in the middle of an
9397 expression with side effects on the pointed-to type size
9398 "arguments" prior to the pointer declaration point and the
9399 size evaluation could end up prior to the side effects. */
9401 if (!TYPE_NAME (type
)
9402 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9403 && at_function_scope_p ()
9404 && variably_modified_type_p (type
, NULL_TREE
))
9406 /* First break out any side-effects. */
9407 stabilize_vla_size (TYPE_SIZE (type
));
9408 /* And then force evaluation of the SAVE_EXPR. */
9409 finish_expr_stmt (TYPE_SIZE (type
));
9412 if (declarator
->kind
== cdk_reference
)
9414 /* In C++0x, the type we are creating a reference to might be
9415 a typedef which is itself a reference type. In that case,
9416 we follow the reference collapsing rules in
9417 [7.1.3/8 dcl.typedef] to create the final reference type:
9419 "If a typedef TD names a type that is a reference to a type
9420 T, an attempt to create the type 'lvalue reference to cv TD'
9421 creates the type 'lvalue reference to T,' while an attempt
9422 to create the type "rvalue reference to cv TD' creates the
9425 if (VOID_TYPE_P (type
))
9426 /* We already gave an error. */;
9427 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9429 if (declarator
->u
.reference
.rvalue_ref
)
9430 /* Leave type alone. */;
9432 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9435 type
= cp_build_reference_type
9436 (type
, declarator
->u
.reference
.rvalue_ref
);
9438 /* In C++0x, we need this check for direct reference to
9439 reference declarations, which are forbidden by
9440 [8.3.2/5 dcl.ref]. Reference to reference declarations
9441 are only allowed indirectly through typedefs and template
9442 type arguments. Example:
9444 void foo(int & &); // invalid ref-to-ref decl
9446 typedef int & int_ref;
9447 void foo(int_ref &); // valid ref-to-ref decl
9449 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9450 error ("cannot declare reference to %q#T, which is not "
9451 "a typedef or a template type argument", type
);
9453 else if (TREE_CODE (type
) == METHOD_TYPE
)
9454 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9455 else if (declarator
->kind
== cdk_ptrmem
)
9457 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9459 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9460 /* We will already have complained. */
9461 type
= error_mark_node
;
9463 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9467 type
= build_pointer_type (type
);
9469 /* Process a list of type modifier keywords (such as
9470 const or volatile) that were given inside the `*' or `&'. */
9472 if (declarator
->u
.pointer
.qualifiers
)
9475 = cp_build_qualified_type (type
,
9476 declarator
->u
.pointer
.qualifiers
);
9477 type_quals
= cp_type_quals (type
);
9490 /* We need to stabilize side-effects in VLA sizes for regular array
9491 declarations too, not just pointers to arrays. */
9492 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9493 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9494 && at_function_scope_p ()
9495 && variably_modified_type_p (type
, NULL_TREE
))
9496 stabilize_vla_size (TYPE_SIZE (type
));
9498 /* A `constexpr' specifier used in an object declaration declares
9499 the object as `const'. */
9500 if (constexpr_p
&& innermost_code
!= cdk_function
)
9502 if (type_quals
& TYPE_QUAL_CONST
)
9503 error ("both %<const%> and %<constexpr%> cannot be used here");
9504 if (type_quals
& TYPE_QUAL_VOLATILE
)
9505 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9506 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9508 type_quals
|= TYPE_QUAL_CONST
;
9509 type
= cp_build_qualified_type (type
, type_quals
);
9513 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9514 && TREE_CODE (type
) != FUNCTION_TYPE
9515 && TREE_CODE (type
) != METHOD_TYPE
)
9517 error ("template-id %qD used as a declarator",
9519 unqualified_id
= dname
;
9522 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9523 qualified with a class-name, turn it into a METHOD_TYPE, unless
9524 we know that the function is static. We take advantage of this
9525 opportunity to do other processing that pertains to entities
9526 explicitly declared to be class members. Note that if DECLARATOR
9527 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9528 would not have exited the loop above. */
9530 && declarator
->u
.id
.qualifying_scope
9531 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9535 ctype
= declarator
->u
.id
.qualifying_scope
;
9536 ctype
= TYPE_MAIN_VARIANT (ctype
);
9538 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
9540 /* You're supposed to have one `template <...>' for every
9541 template class, but you don't need one for a full
9542 specialization. For example:
9544 template <class T> struct S{};
9545 template <> struct S<int> { void f(); };
9546 void S<int>::f () {}
9548 is correct; there shouldn't be a `template <>' for the
9549 definition of `S<int>::f'. */
9550 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
9551 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
9552 /* T is an explicit (not partial) specialization. All
9553 containing classes must therefore also be explicitly
9556 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
9557 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
9558 template_count
+= 1;
9560 t
= TYPE_MAIN_DECL (t
);
9561 t
= DECL_CONTEXT (t
);
9564 if (ctype
== current_class_type
)
9568 permerror (input_location
, "member functions are implicitly friends of their class");
9572 permerror (declarator
->id_loc
,
9573 "extra qualification %<%T::%> on member %qs",
9576 else if (/* If the qualifying type is already complete, then we
9577 can skip the following checks. */
9578 !COMPLETE_TYPE_P (ctype
)
9579 && (/* If the function is being defined, then
9580 qualifying type must certainly be complete. */
9582 /* A friend declaration of "T::f" is OK, even if
9583 "T" is a template parameter. But, if this
9584 function is not a friend, the qualifying type
9586 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9587 /* For a declaration, the type need not be
9588 complete, if either it is dependent (since there
9589 is no meaningful definition of complete in that
9590 case) or the qualifying class is currently being
9592 || !(dependent_type_p (ctype
)
9593 || currently_open_class (ctype
)))
9594 /* Check that the qualifying type is complete. */
9595 && !complete_type_or_else (ctype
, NULL_TREE
))
9596 return error_mark_node
;
9597 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9599 if (current_class_type
9600 && (!friendp
|| funcdef_flag
))
9603 ? G_("cannot define member function %<%T::%s%> "
9605 : G_("cannot declare member function %<%T::%s%> "
9607 ctype
, name
, current_class_type
);
9608 return error_mark_node
;
9611 else if (declspecs
->specs
[(int)ds_typedef
]
9612 && current_class_type
)
9614 error ("cannot declare member %<%T::%s%> within %qT",
9615 ctype
, name
, current_class_type
);
9616 return error_mark_node
;
9620 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9621 ctype
= current_class_type
;
9623 /* Now TYPE has the actual type. */
9628 *attrlist
= chainon (returned_attrs
, *attrlist
);
9630 attrlist
= &returned_attrs
;
9633 /* Handle parameter packs. */
9634 if (parameter_pack_p
)
9636 if (decl_context
== PARM
)
9637 /* Turn the type into a pack expansion.*/
9638 type
= make_pack_expansion (type
);
9640 error ("non-parameter %qs cannot be a parameter pack", name
);
9643 /* Did array size calculations overflow? */
9645 if (TREE_CODE (type
) == ARRAY_TYPE
9646 && COMPLETE_TYPE_P (type
)
9647 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9648 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
9650 error ("size of array %qs is too large", name
);
9651 /* If we proceed with the array type as it is, we'll eventually
9652 crash in tree_low_cst(). */
9653 type
= error_mark_node
;
9656 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9657 && !processing_template_decl
9658 && variably_modified_type_p (type
, NULL_TREE
))
9660 if (decl_context
== FIELD
)
9661 error ("data member may not have variably modified type %qT", type
);
9663 error ("parameter may not have variably modified type %qT", type
);
9664 type
= error_mark_node
;
9667 if (explicitp
== 1 || (explicitp
&& friendp
))
9669 /* [dcl.fct.spec] The explicit specifier shall only be used in
9670 declarations of constructors within a class definition. */
9671 error ("only declarations of constructors can be %<explicit%>");
9675 if (storage_class
== sc_mutable
)
9677 if (decl_context
!= FIELD
|| friendp
)
9679 error ("non-member %qs cannot be declared %<mutable%>", name
);
9680 storage_class
= sc_none
;
9682 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9684 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9685 storage_class
= sc_none
;
9687 else if (TREE_CODE (type
) == FUNCTION_TYPE
9688 || TREE_CODE (type
) == METHOD_TYPE
)
9690 error ("function %qs cannot be declared %<mutable%>", name
);
9691 storage_class
= sc_none
;
9695 error ("static %qs cannot be declared %<mutable%>", name
);
9696 storage_class
= sc_none
;
9698 else if (type_quals
& TYPE_QUAL_CONST
)
9700 error ("const %qs cannot be declared %<mutable%>", name
);
9701 storage_class
= sc_none
;
9703 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9705 permerror (input_location
, "reference %qs cannot be declared "
9706 "%<mutable%>", name
);
9707 storage_class
= sc_none
;
9711 /* If this is declaring a typedef name, return a TYPE_DECL. */
9712 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9716 /* Note that the grammar rejects storage classes
9717 in typenames, fields or parameters. */
9718 if (current_lang_name
== lang_name_java
)
9719 TYPE_FOR_JAVA (type
) = 1;
9721 /* This declaration:
9723 typedef void f(int) const;
9725 declares a function type which is not a member of any
9726 particular class, but which is cv-qualified; for
9727 example "f S::*" declares a pointer to a const-qualified
9728 member function of S. We record the cv-qualification in the
9730 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9732 type
= apply_memfn_quals (type
, memfn_quals
);
9734 /* We have now dealt with these qualifiers. */
9735 memfn_quals
= TYPE_UNQUALIFIED
;
9738 if (type_uses_auto (type
))
9740 error ("typedef declared %<auto%>");
9741 type
= error_mark_node
;
9744 if (decl_context
== FIELD
)
9745 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9747 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9748 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9749 error_at (DECL_SOURCE_LOCATION (decl
),
9750 "typedef name may not be a nested-name-specifier");
9751 TREE_TYPE (decl
) = error_mark_node
;
9754 if (decl_context
!= FIELD
)
9756 if (!current_function_decl
)
9757 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9758 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9759 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9760 (current_function_decl
)))
9761 /* The TYPE_DECL is "abstract" because there will be
9762 clones of this constructor/destructor, and there will
9763 be copies of this TYPE_DECL generated in those
9765 DECL_ABSTRACT (decl
) = 1;
9767 else if (constructor_name_p (unqualified_id
, current_class_type
))
9768 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9769 "as enclosing class",
9772 /* If the user declares "typedef struct {...} foo" then the
9773 struct will have an anonymous name. Fill that name in now.
9774 Nothing can refer to it, so nothing needs know about the name
9776 if (type
!= error_mark_node
9779 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9780 && TYPE_ANONYMOUS_P (type
)
9781 && declspecs
->type_definition_p
9782 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9786 /* Replace the anonymous name with the real name everywhere. */
9787 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9789 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9790 /* We do not rename the debug info representing the
9791 anonymous tagged type because the standard says in
9792 [dcl.typedef] that the naming applies only for
9793 linkage purposes. */
9794 /*debug_hooks->set_name (t, decl);*/
9795 TYPE_NAME (t
) = decl
;
9798 if (TYPE_LANG_SPECIFIC (type
))
9799 TYPE_WAS_ANONYMOUS (type
) = 1;
9801 /* If this is a typedef within a template class, the nested
9802 type is a (non-primary) template. The name for the
9803 template needs updating as well. */
9804 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9805 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9806 = TYPE_IDENTIFIER (type
);
9808 /* Adjust linkage now that we aren't anonymous anymore. */
9809 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9810 determine_visibility (TYPE_MAIN_DECL (type
));
9812 /* FIXME remangle member functions; member functions of a
9813 type with external linkage have external linkage. */
9817 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9818 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9820 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
9821 memfn_quals
!= TYPE_UNQUALIFIED
,
9822 inlinep
, friendp
, raises
!= NULL_TREE
);
9824 if (declspecs
->specs
[(int)ds_alias
])
9825 /* Acknowledge that this was written:
9826 `using analias = atype;'. */
9827 TYPE_DECL_ALIAS_P (decl
) = 1;
9832 /* Detect the case of an array type of unspecified size
9833 which came, as such, direct from a typedef name.
9834 We must copy the type, so that the array's domain can be
9835 individually set by the object's initializer. */
9837 if (type
&& typedef_type
9838 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9839 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9840 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9842 /* Detect where we're using a typedef of function type to declare a
9843 function. PARMS will not be set, so we must create it now. */
9845 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9847 tree decls
= NULL_TREE
;
9850 for (args
= TYPE_ARG_TYPES (type
);
9851 args
&& args
!= void_list_node
;
9852 args
= TREE_CHAIN (args
))
9854 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9856 DECL_CHAIN (decl
) = decls
;
9860 parms
= nreverse (decls
);
9862 if (decl_context
!= TYPENAME
)
9864 /* A cv-qualifier-seq shall only be part of the function type
9865 for a non-static member function. [8.3.5/4 dcl.fct] */
9866 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9867 && (current_class_type
== NULL_TREE
|| staticp
) )
9870 ? G_("qualified function types cannot be used to "
9871 "declare static member functions")
9872 : G_("qualified function types cannot be used to "
9873 "declare free functions"));
9874 type
= TYPE_MAIN_VARIANT (type
);
9877 /* The qualifiers on the function type become the qualifiers on
9878 the non-static member function. */
9879 memfn_quals
|= type_memfn_quals (type
);
9880 type_quals
= TYPE_UNQUALIFIED
;
9884 /* If this is a type name (such as, in a cast or sizeof),
9885 compute the type and return it now. */
9887 if (decl_context
== TYPENAME
)
9889 /* Note that the grammar rejects storage classes
9890 in typenames, fields or parameters. */
9891 if (type_quals
!= TYPE_UNQUALIFIED
)
9892 type_quals
= TYPE_UNQUALIFIED
;
9894 /* Special case: "friend class foo" looks like a TYPENAME context. */
9897 if (type_quals
!= TYPE_UNQUALIFIED
)
9899 error ("type qualifiers specified for friend class declaration");
9900 type_quals
= TYPE_UNQUALIFIED
;
9904 error ("%<inline%> specified for friend class declaration");
9910 /* Don't allow friend declaration without a class-key. */
9911 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9912 permerror (input_location
, "template parameters cannot be friends");
9913 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9914 permerror (input_location
, "friend declaration requires class-key, "
9915 "i.e. %<friend class %T::%D%>",
9916 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9918 permerror (input_location
, "friend declaration requires class-key, "
9919 "i.e. %<friend %#T%>",
9923 /* Only try to do this stuff if we didn't already give up. */
9924 if (type
!= integer_type_node
)
9926 /* A friendly class? */
9927 if (current_class_type
)
9928 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9931 error ("trying to make class %qT a friend of global scope",
9934 type
= void_type_node
;
9937 else if (memfn_quals
)
9939 if (ctype
== NULL_TREE
9940 && TREE_CODE (type
) == METHOD_TYPE
)
9941 ctype
= TYPE_METHOD_BASETYPE (type
);
9944 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9945 /* Core issue #547: need to allow this in template type args. */
9946 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9947 type
= apply_memfn_quals (type
, memfn_quals
);
9949 error ("invalid qualifiers on non-member function type");
9954 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9955 && decl_context
!= CATCHPARM
9956 && TREE_CODE (type
) != UNION_TYPE
9959 error ("abstract declarator %qT used as declaration", type
);
9960 return error_mark_node
;
9963 /* Only functions may be declared using an operator-function-id. */
9965 && IDENTIFIER_OPNAME_P (unqualified_id
)
9966 && TREE_CODE (type
) != FUNCTION_TYPE
9967 && TREE_CODE (type
) != METHOD_TYPE
)
9969 error ("declaration of %qD as non-function", unqualified_id
);
9970 return error_mark_node
;
9973 /* We don't check parameter types here because we can emit a better
9974 error message later. */
9975 if (decl_context
!= PARM
)
9977 type
= check_var_type (unqualified_id
, type
);
9978 if (type
== error_mark_node
)
9979 return error_mark_node
;
9982 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9983 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9985 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9987 if (ctype
|| in_namespace
)
9988 error ("cannot use %<::%> in parameter declaration");
9990 if (type_uses_auto (type
))
9992 error ("parameter declared %<auto%>");
9993 type
= error_mark_node
;
9996 /* A parameter declared as an array of T is really a pointer to T.
9997 One declared as a function is really a pointer to a function.
9998 One declared as a member is really a pointer to member. */
10000 if (TREE_CODE (type
) == ARRAY_TYPE
)
10002 /* Transfer const-ness of array into that of type pointed to. */
10003 type
= build_pointer_type (TREE_TYPE (type
));
10004 type_quals
= TYPE_UNQUALIFIED
;
10006 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10007 type
= build_pointer_type (type
);
10010 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10011 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10013 cp_cv_quals real_quals
= memfn_quals
;
10014 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10015 real_quals
|= TYPE_QUAL_CONST
;
10016 type
= build_memfn_type (type
, ctype
, real_quals
);
10022 if (decl_context
== PARM
)
10024 decl
= cp_build_parm_decl (unqualified_id
, type
);
10026 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10027 memfn_quals
!= TYPE_UNQUALIFIED
,
10028 inlinep
, friendp
, raises
!= NULL_TREE
);
10030 else if (decl_context
== FIELD
)
10032 if (!staticp
&& type_uses_auto (type
))
10034 error ("non-static data member declared %<auto%>");
10035 type
= error_mark_node
;
10038 /* The C99 flexible array extension. */
10039 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10040 && TYPE_DOMAIN (type
) == NULL_TREE
)
10042 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10043 tf_warning_or_error
);
10044 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10047 if (type
== error_mark_node
)
10049 /* Happens when declaring arrays of sizes which
10050 are error_mark_node, for example. */
10053 else if (in_namespace
&& !friendp
)
10055 /* Something like struct S { int N::j; }; */
10056 error ("invalid use of %<::%>");
10057 return error_mark_node
;
10059 else if (TREE_CODE (type
) == FUNCTION_TYPE
10060 || TREE_CODE (type
) == METHOD_TYPE
)
10063 tree function_context
;
10067 /* This should never happen in pure C++ (the check
10068 could be an assert). It could happen in
10069 Objective-C++ if someone writes invalid code that
10070 uses a function declaration for an instance
10071 variable or property (instance variables and
10072 properties are parsed as FIELD_DECLs, but they are
10073 part of an Objective-C class, not a C++ class).
10074 That code is invalid and is caught by this
10078 error ("declaration of function %qD in invalid context",
10080 return error_mark_node
;
10083 /* ``A union may [ ... ] not [ have ] virtual functions.''
10085 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10087 error ("function %qD declared virtual inside a union",
10089 return error_mark_node
;
10092 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10096 error ("%qD cannot be declared virtual, since it "
10097 "is always static",
10104 /* Check that the name used for a destructor makes sense. */
10105 if (sfk
== sfk_destructor
)
10107 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10111 gcc_assert (friendp
);
10112 error ("expected qualified name in friend declaration "
10113 "for destructor %qD", uqname
);
10114 return error_mark_node
;
10117 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10119 error ("declaration of %qD as member of %qT",
10121 return error_mark_node
;
10125 error ("a destructor cannot be %<constexpr%>");
10126 return error_mark_node
;
10129 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10131 error ("expected qualified name in friend declaration "
10132 "for constructor %qD",
10133 id_declarator
->u
.id
.unqualified_name
);
10134 return error_mark_node
;
10137 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10138 function_context
= (ctype
!= NULL_TREE
) ?
10139 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10140 publicp
= (! friendp
|| ! staticp
)
10141 && function_context
== NULL_TREE
;
10142 decl
= grokfndecl (ctype
, type
,
10143 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10144 ? unqualified_id
: dname
,
10147 virtualp
, flags
, memfn_quals
, raises
,
10148 friendp
? -1 : 0, friendp
, publicp
,
10149 inlinep
| (2 * constexpr_p
),
10151 funcdef_flag
, template_count
, in_namespace
,
10152 attrlist
, declarator
->id_loc
);
10153 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10154 if (decl
== NULL_TREE
)
10155 return error_mark_node
;
10157 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10158 /* The decl and setting of decl_attr is also turned off. */
10159 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10162 /* [class.conv.ctor]
10164 A constructor declared without the function-specifier
10165 explicit that can be called with a single parameter
10166 specifies a conversion from the type of its first
10167 parameter to the type of its class. Such a constructor
10168 is called a converting constructor. */
10169 if (explicitp
== 2)
10170 DECL_NONCONVERTING_P (decl
) = 1;
10172 else if (!staticp
&& !dependent_type_p (type
)
10173 && !COMPLETE_TYPE_P (complete_type (type
))
10174 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10176 if (unqualified_id
)
10177 error ("field %qD has incomplete type", unqualified_id
);
10179 error ("name %qT has incomplete type", type
);
10181 /* If we're instantiating a template, tell them which
10182 instantiation made the field's type be incomplete. */
10183 if (current_class_type
10184 && TYPE_NAME (current_class_type
)
10185 && IDENTIFIER_TEMPLATE (current_class_name
)
10187 && declspecs
->type
== type
)
10188 error (" in instantiation of template %qT",
10189 current_class_type
);
10191 return error_mark_node
;
10197 error ("%qE is neither function nor member function; "
10198 "cannot be declared friend", unqualified_id
);
10206 /* Friends are treated specially. */
10207 if (ctype
== current_class_type
)
10208 ; /* We already issued a permerror. */
10209 else if (decl
&& DECL_NAME (decl
))
10211 if (template_class_depth (current_class_type
) == 0)
10213 decl
= check_explicit_specialization
10214 (unqualified_id
, decl
, template_count
,
10215 2 * funcdef_flag
+ 4);
10216 if (decl
== error_mark_node
)
10217 return error_mark_node
;
10220 decl
= do_friend (ctype
, unqualified_id
, decl
,
10226 return error_mark_node
;
10229 /* Structure field. It may not be a function, except for C++. */
10231 if (decl
== NULL_TREE
)
10235 /* C++ allows static class members. All other work
10236 for this is done by grokfield. */
10237 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
10238 set_linkage_for_static_data_member (decl
);
10239 /* Even if there is an in-class initialization, DECL
10240 is considered undefined until an out-of-class
10241 definition is provided. */
10242 DECL_EXTERNAL (decl
) = 1;
10245 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10247 if (constexpr_p
&& !initialized
)
10249 error ("constexpr static data member %qD must have an "
10250 "initializer", decl
);
10251 constexpr_p
= false;
10258 error ("non-static data member %qE declared %<constexpr%>",
10260 constexpr_p
= false;
10262 decl
= build_decl (input_location
,
10263 FIELD_DECL
, unqualified_id
, type
);
10264 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10265 if (bitfield
&& !unqualified_id
)
10266 TREE_NO_WARNING (decl
) = 1;
10268 if (storage_class
== sc_mutable
)
10270 DECL_MUTABLE_P (decl
) = 1;
10271 storage_class
= sc_none
;
10276 /* An attempt is being made to initialize a non-static
10277 member. This is new in C++11. */
10278 maybe_warn_cpp0x (CPP0X_NSDMI
);
10280 /* If this has been parsed with static storage class, but
10281 errors forced staticp to be cleared, ensure NSDMI is
10283 if (declspecs
->storage_class
== sc_static
)
10284 DECL_INITIAL (decl
) = error_mark_node
;
10288 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10289 memfn_quals
!= TYPE_UNQUALIFIED
,
10290 inlinep
, friendp
, raises
!= NULL_TREE
);
10293 else if (TREE_CODE (type
) == FUNCTION_TYPE
10294 || TREE_CODE (type
) == METHOD_TYPE
)
10296 tree original_name
;
10299 if (!unqualified_id
)
10300 return error_mark_node
;
10302 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10303 original_name
= dname
;
10305 original_name
= unqualified_id
;
10307 if (storage_class
== sc_auto
)
10308 error ("storage class %<auto%> invalid for function %qs", name
);
10309 else if (storage_class
== sc_register
)
10310 error ("storage class %<register%> invalid for function %qs", name
);
10312 error ("storage class %<__thread%> invalid for function %qs", name
);
10314 if (virt_specifiers
)
10315 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10316 /* Function declaration not at top level.
10317 Storage classes other than `extern' are not allowed
10318 and `extern' makes no difference. */
10319 if (! toplevel_bindings_p ()
10320 && (storage_class
== sc_static
10321 || declspecs
->specs
[(int)ds_inline
])
10324 if (storage_class
== sc_static
)
10325 pedwarn (input_location
, OPT_pedantic
,
10326 "%<static%> specified invalid for function %qs "
10327 "declared out of global scope", name
);
10329 pedwarn (input_location
, OPT_pedantic
,
10330 "%<inline%> specifier invalid for function %qs "
10331 "declared out of global scope", name
);
10334 if (ctype
== NULL_TREE
)
10338 error ("virtual non-class function %qs", name
);
10341 else if (sfk
== sfk_constructor
10342 || sfk
== sfk_destructor
)
10344 error (funcdef_flag
10345 ? G_("%qs defined in a non-class scope")
10346 : G_("%qs declared in a non-class scope"), name
);
10351 /* Record presence of `static'. */
10352 publicp
= (ctype
!= NULL_TREE
10353 || storage_class
== sc_extern
10354 || storage_class
!= sc_static
);
10356 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10357 virtualp
, flags
, memfn_quals
, raises
,
10359 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10361 template_count
, in_namespace
, attrlist
,
10362 declarator
->id_loc
);
10363 if (decl
== NULL_TREE
)
10364 return error_mark_node
;
10368 int invalid_static
= 0;
10370 /* Don't allow a static member function in a class, and forbid
10371 declaring main to be static. */
10372 if (TREE_CODE (type
) == METHOD_TYPE
)
10374 permerror (input_location
, "cannot declare member function %qD to have "
10375 "static linkage", decl
);
10376 invalid_static
= 1;
10378 else if (current_function_decl
)
10380 /* FIXME need arm citation */
10381 error ("cannot declare static function inside another function");
10382 invalid_static
= 1;
10385 if (invalid_static
)
10388 storage_class
= sc_none
;
10394 /* It's a variable. */
10396 /* An uninitialized decl with `extern' is a reference. */
10397 decl
= grokvardecl (type
, unqualified_id
,
10400 (type_quals
& TYPE_QUAL_CONST
) != 0,
10401 ctype
? ctype
: in_namespace
);
10402 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10403 memfn_quals
!= TYPE_UNQUALIFIED
,
10404 inlinep
, friendp
, raises
!= NULL_TREE
);
10408 DECL_CONTEXT (decl
) = ctype
;
10411 permerror (input_location
, "%<static%> may not be used when defining "
10412 "(as opposed to declaring) a static data member");
10414 storage_class
= sc_none
;
10416 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10418 error ("static member %qD declared %<register%>", decl
);
10419 storage_class
= sc_none
;
10421 if (storage_class
== sc_extern
&& pedantic
)
10423 pedwarn (input_location
, OPT_pedantic
,
10424 "cannot explicitly declare member %q#D to have "
10425 "extern linkage", decl
);
10426 storage_class
= sc_none
;
10429 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10431 error ("declaration of constexpr variable %qD is not a definition",
10433 constexpr_p
= false;
10437 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10439 if (toplevel_bindings_p ())
10441 /* It's common practice (and completely valid) to have a const
10442 be initialized and declared extern. */
10443 if (!(type_quals
& TYPE_QUAL_CONST
))
10444 warning (0, "%qs initialized and declared %<extern%>", name
);
10448 error ("%qs has both %<extern%> and initializer", name
);
10449 return error_mark_node
;
10453 /* Record `register' declaration for warnings on &
10454 and in case doing stupid register allocation. */
10456 if (storage_class
== sc_register
)
10457 DECL_REGISTER (decl
) = 1;
10458 else if (storage_class
== sc_extern
)
10459 DECL_THIS_EXTERN (decl
) = 1;
10460 else if (storage_class
== sc_static
)
10461 DECL_THIS_STATIC (decl
) = 1;
10463 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10464 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10465 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10467 /* Record constancy and volatility on the DECL itself . There's
10468 no need to do this when processing a template; we'll do this
10469 for the instantiated declaration based on the type of DECL. */
10470 if (!processing_template_decl
)
10471 cp_apply_type_quals_to_decl (type_quals
, decl
);
10477 /* Subroutine of start_function. Ensure that each of the parameter
10478 types (as listed in PARMS) is complete, as is required for a
10479 function definition. */
10482 require_complete_types_for_parms (tree parms
)
10484 for (; parms
; parms
= DECL_CHAIN (parms
))
10486 if (dependent_type_p (TREE_TYPE (parms
)))
10488 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10489 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10491 relayout_decl (parms
);
10492 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10495 /* grokparms or complete_type_or_else will have already issued
10497 TREE_TYPE (parms
) = error_mark_node
;
10501 /* Returns nonzero if T is a local variable. */
10504 local_variable_p (const_tree t
)
10506 if ((TREE_CODE (t
) == VAR_DECL
10507 /* A VAR_DECL with a context that is a _TYPE is a static data
10509 && !TYPE_P (CP_DECL_CONTEXT (t
))
10510 /* Any other non-local variable must be at namespace scope. */
10511 && !DECL_NAMESPACE_SCOPE_P (t
))
10512 || (TREE_CODE (t
) == PARM_DECL
))
10518 /* Like local_variable_p, but suitable for use as a tree-walking
10522 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10523 void *data ATTRIBUTE_UNUSED
)
10525 /* Check DECL_NAME to avoid including temporaries. We don't check
10526 DECL_ARTIFICIAL because we do want to complain about 'this'. */
10527 if (local_variable_p (*tp
) && DECL_NAME (*tp
))
10529 else if (TYPE_P (*tp
))
10530 *walk_subtrees
= 0;
10535 /* Check that ARG, which is a default-argument expression for a
10536 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10537 something goes wrong. DECL may also be a _TYPE node, rather than a
10538 DECL, if there is no DECL available. */
10541 check_default_argument (tree decl
, tree arg
)
10546 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10547 /* We get a DEFAULT_ARG when looking at an in-class declaration
10548 with a default argument. Ignore the argument for now; we'll
10549 deal with it after the class is complete. */
10558 decl_type
= TREE_TYPE (decl
);
10560 if (arg
== error_mark_node
10561 || decl
== error_mark_node
10562 || TREE_TYPE (arg
) == error_mark_node
10563 || decl_type
== error_mark_node
)
10564 /* Something already went wrong. There's no need to check
10566 return error_mark_node
;
10568 /* [dcl.fct.default]
10570 A default argument expression is implicitly converted to the
10572 if (!TREE_TYPE (arg
)
10573 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
10576 error ("default argument for %q#D has type %qT",
10577 decl
, TREE_TYPE (arg
));
10579 error ("default argument for parameter of type %qT has type %qT",
10580 decl_type
, TREE_TYPE (arg
));
10582 return error_mark_node
;
10585 /* [dcl.fct.default]
10587 Local variables shall not be used in default argument
10590 The keyword `this' shall not be used in a default argument of a
10591 member function. */
10592 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10595 if (DECL_NAME (var
) == this_identifier
)
10596 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10598 error ("default argument %qE uses local variable %qD", arg
, var
);
10599 return error_mark_node
;
10606 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10609 type_is_deprecated (tree type
)
10611 enum tree_code code
;
10612 if (TREE_DEPRECATED (type
))
10614 if (TYPE_NAME (type
)
10615 && TREE_DEPRECATED (TYPE_NAME (type
)))
10618 /* Do warn about using typedefs to a deprecated class. */
10619 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10620 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10622 code
= TREE_CODE (type
);
10624 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10625 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10626 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10627 return type_is_deprecated (TREE_TYPE (type
));
10629 if (TYPE_PTRMEMFUNC_P (type
))
10630 return type_is_deprecated
10631 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10636 /* Decode the list of parameter types for a function type.
10637 Given the list of things declared inside the parens,
10638 return a list of types.
10640 If this parameter does not end with an ellipsis, we append
10643 *PARMS is set to the chain of PARM_DECLs created. */
10646 grokparms (tree parmlist
, tree
*parms
)
10648 tree result
= NULL_TREE
;
10649 tree decls
= NULL_TREE
;
10653 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10655 tree type
= NULL_TREE
;
10656 tree init
= TREE_PURPOSE (parm
);
10657 tree decl
= TREE_VALUE (parm
);
10658 const char *errmsg
;
10660 if (parm
== void_list_node
)
10663 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10666 type
= TREE_TYPE (decl
);
10667 if (VOID_TYPE_P (type
))
10669 if (same_type_p (type
, void_type_node
)
10670 && DECL_SELF_REFERENCE_P (type
)
10671 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10672 /* this is a parmlist of `(void)', which is ok. */
10674 cxx_incomplete_type_error (decl
, type
);
10675 /* It's not a good idea to actually create parameters of
10676 type `void'; other parts of the compiler assume that a
10677 void type terminates the parameter list. */
10678 type
= error_mark_node
;
10679 TREE_TYPE (decl
) = error_mark_node
;
10682 if (type
!= error_mark_node
10683 && TYPE_FOR_JAVA (type
)
10684 && MAYBE_CLASS_TYPE_P (type
))
10686 error ("parameter %qD has Java class type", decl
);
10687 type
= error_mark_node
;
10688 TREE_TYPE (decl
) = error_mark_node
;
10692 if (type
!= error_mark_node
10693 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10696 type
= error_mark_node
;
10697 TREE_TYPE (decl
) = error_mark_node
;
10700 if (type
!= error_mark_node
)
10702 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10704 tree deptype
= type_is_deprecated (type
);
10706 warn_deprecated_use (deptype
, NULL_TREE
);
10709 /* Top-level qualifiers on the parameters are
10710 ignored for function types. */
10711 type
= cp_build_qualified_type (type
, 0);
10712 if (TREE_CODE (type
) == METHOD_TYPE
)
10714 error ("parameter %qD invalidly declared method type", decl
);
10715 type
= build_pointer_type (type
);
10716 TREE_TYPE (decl
) = type
;
10718 else if (abstract_virtuals_error (decl
, type
))
10719 any_error
= 1; /* Seems like a good idea. */
10720 else if (POINTER_TYPE_P (type
))
10722 /* [dcl.fct]/6, parameter types cannot contain pointers
10723 (references) to arrays of unknown bound. */
10724 tree t
= TREE_TYPE (type
);
10725 int ptr
= TYPE_PTR_P (type
);
10729 if (TYPE_PTR_P (t
))
10731 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10733 else if (!TYPE_DOMAIN (t
))
10737 if (TREE_CODE (t
) == ARRAY_TYPE
)
10739 ? G_("parameter %qD includes pointer to array of "
10740 "unknown bound %qT")
10741 : G_("parameter %qD includes reference to array of "
10742 "unknown bound %qT"),
10748 else if (init
&& !processing_template_decl
)
10749 init
= check_default_argument (decl
, init
);
10752 DECL_CHAIN (decl
) = decls
;
10754 result
= tree_cons (init
, type
, result
);
10756 decls
= nreverse (decls
);
10757 result
= nreverse (result
);
10759 result
= chainon (result
, void_list_node
);
10766 /* D is a constructor or overloaded `operator='.
10768 Let T be the class in which D is declared. Then, this function
10771 -1 if D's is an ill-formed constructor or copy assignment operator
10772 whose first parameter is of type `T'.
10773 0 if D is not a copy constructor or copy assignment
10775 1 if D is a copy constructor or copy assignment operator whose
10776 first parameter is a reference to non-const qualified T.
10777 2 if D is a copy constructor or copy assignment operator whose
10778 first parameter is a reference to const qualified T.
10780 This function can be used as a predicate. Positive values indicate
10781 a copy constructor and nonzero values indicate a copy assignment
10785 copy_fn_p (const_tree d
)
10791 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10793 if (TREE_CODE (d
) == TEMPLATE_DECL
10794 || (DECL_TEMPLATE_INFO (d
)
10795 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10796 /* Instantiations of template member functions are never copy
10797 functions. Note that member functions of templated classes are
10798 represented as template functions internally, and we must
10799 accept those as copy functions. */
10802 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10806 arg_type
= TREE_VALUE (args
);
10807 if (arg_type
== error_mark_node
)
10810 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10812 /* Pass by value copy assignment operator. */
10815 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10816 && !TYPE_REF_IS_RVALUE (arg_type
)
10817 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10819 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10825 args
= TREE_CHAIN (args
);
10827 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10828 /* There are more non-optional args. */
10834 /* D is a constructor or overloaded `operator='.
10836 Let T be the class in which D is declared. Then, this function
10837 returns true when D is a move constructor or move assignment
10838 operator, false otherwise. */
10841 move_fn_p (const_tree d
)
10845 bool result
= false;
10847 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10849 if (cxx_dialect
== cxx98
)
10850 /* There are no move constructors if we are in C++98 mode. */
10853 if (TREE_CODE (d
) == TEMPLATE_DECL
10854 || (DECL_TEMPLATE_INFO (d
)
10855 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10856 /* Instantiations of template member functions are never copy
10857 functions. Note that member functions of templated classes are
10858 represented as template functions internally, and we must
10859 accept those as copy functions. */
10862 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10866 arg_type
= TREE_VALUE (args
);
10867 if (arg_type
== error_mark_node
)
10870 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10871 && TYPE_REF_IS_RVALUE (arg_type
)
10872 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10876 args
= TREE_CHAIN (args
);
10878 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10879 /* There are more non-optional args. */
10885 /* Remember any special properties of member function DECL. */
10888 grok_special_member_properties (tree decl
)
10892 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10895 class_type
= DECL_CONTEXT (decl
);
10896 if (DECL_CONSTRUCTOR_P (decl
))
10898 int ctor
= copy_fn_p (decl
);
10900 if (!DECL_ARTIFICIAL (decl
))
10901 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10907 A non-template constructor for class X is a copy
10908 constructor if its first parameter is of type X&, const
10909 X&, volatile X& or const volatile X&, and either there
10910 are no other parameters or else all other parameters have
10911 default arguments. */
10912 TYPE_HAS_COPY_CTOR (class_type
) = 1;
10913 if (user_provided_p (decl
))
10914 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
10916 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
10918 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10920 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10921 if (user_provided_p (decl
))
10922 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10924 else if (move_fn_p (decl
) && user_provided_p (decl
))
10925 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
10926 else if (is_list_ctor (decl
))
10927 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10929 if (DECL_DECLARED_CONSTEXPR_P (decl
)
10930 && !copy_fn_p (decl
) && !move_fn_p (decl
))
10931 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
10933 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10937 A non-template assignment operator for class X is a copy
10938 assignment operator if its parameter is of type X, X&, const
10939 X&, volatile X& or const volatile X&. */
10941 int assop
= copy_fn_p (decl
);
10945 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
10946 if (user_provided_p (decl
))
10947 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
10949 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
10951 else if (move_fn_p (decl
) && user_provided_p (decl
))
10952 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
10954 /* Destructors are handled in check_methods. */
10957 /* Check a constructor DECL has the correct form. Complains
10958 if the class has a constructor of the form X(X). */
10961 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10963 int ctor_parm
= copy_fn_p (decl
);
10969 A declaration of a constructor for a class X is ill-formed if
10970 its first parameter is of type (optionally cv-qualified) X
10971 and either there are no other parameters or else all other
10972 parameters have default arguments.
10974 We *don't* complain about member template instantiations that
10975 have this form, though; they can occur as we try to decide
10976 what constructor to use during overload resolution. Since
10977 overload resolution will never prefer such a constructor to
10978 the non-template copy constructor (which is either explicitly
10979 or implicitly defined), there's no need to worry about their
10980 existence. Theoretically, they should never even be
10981 instantiated, but that's hard to forestall. */
10982 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10990 /* An operator with this code is unary, but can also be binary. */
10993 ambi_op_p (enum tree_code code
)
10995 return (code
== INDIRECT_REF
10996 || code
== ADDR_EXPR
10997 || code
== UNARY_PLUS_EXPR
10998 || code
== NEGATE_EXPR
10999 || code
== PREINCREMENT_EXPR
11000 || code
== PREDECREMENT_EXPR
);
11003 /* An operator with this name can only be unary. */
11006 unary_op_p (enum tree_code code
)
11008 return (code
== TRUTH_NOT_EXPR
11009 || code
== BIT_NOT_EXPR
11010 || code
== COMPONENT_REF
11011 || code
== TYPE_EXPR
);
11014 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11015 errors are issued for invalid declarations. */
11018 grok_op_properties (tree decl
, bool complain
)
11020 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11022 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11023 tree name
= DECL_NAME (decl
);
11024 enum tree_code operator_code
;
11029 /* Count the number of arguments and check for ellipsis. */
11030 for (argtype
= argtypes
, arity
= 0;
11031 argtype
&& argtype
!= void_list_node
;
11032 argtype
= TREE_CHAIN (argtype
))
11034 ellipsis_p
= !argtype
;
11036 class_type
= DECL_CONTEXT (decl
);
11037 if (class_type
&& !CLASS_TYPE_P (class_type
))
11038 class_type
= NULL_TREE
;
11040 if (DECL_CONV_FN_P (decl
))
11041 operator_code
= TYPE_EXPR
;
11045 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11046 if (ansi_opname (CODE) == name) \
11048 operator_code = (CODE); \
11051 else if (ansi_assopname (CODE) == name) \
11053 operator_code = (CODE); \
11054 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11058 #include "operators.def"
11059 #undef DEF_OPERATOR
11061 gcc_unreachable ();
11064 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11065 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11068 switch (operator_code
)
11071 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11075 TYPE_GETS_DELETE (class_type
) |= 1;
11079 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11082 case VEC_DELETE_EXPR
:
11083 TYPE_GETS_DELETE (class_type
) |= 2;
11090 /* [basic.std.dynamic.allocation]/1:
11092 A program is ill-formed if an allocation function is declared
11093 in a namespace scope other than global scope or declared static
11096 The same also holds true for deallocation functions. */
11097 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11098 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11100 if (DECL_NAMESPACE_SCOPE_P (decl
))
11102 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11104 error ("%qD may not be declared within a namespace", decl
);
11107 else if (!TREE_PUBLIC (decl
))
11109 error ("%qD may not be declared as static", decl
);
11115 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11117 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11118 DECL_IS_OPERATOR_NEW (decl
) = 1;
11120 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11121 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11124 /* An operator function must either be a non-static member function
11125 or have at least one parameter of a class, a reference to a class,
11126 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11127 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11129 if (operator_code
== TYPE_EXPR
11130 || operator_code
== CALL_EXPR
11131 || operator_code
== COMPONENT_REF
11132 || operator_code
== ARRAY_REF
11133 || operator_code
== NOP_EXPR
)
11135 error ("%qD must be a nonstatic member function", decl
);
11142 if (DECL_STATIC_FUNCTION_P (decl
))
11144 error ("%qD must be either a non-static member "
11145 "function or a non-member function", decl
);
11149 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11151 tree arg
= non_reference (TREE_VALUE (p
));
11152 if (arg
== error_mark_node
)
11155 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11156 because these checks are performed even on
11157 template functions. */
11158 if (MAYBE_CLASS_TYPE_P (arg
)
11159 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11163 if (!p
|| p
== void_list_node
)
11166 error ("%qD must have an argument of class or "
11167 "enumerated type", decl
);
11173 /* There are no restrictions on the arguments to an overloaded
11175 if (operator_code
== CALL_EXPR
)
11178 /* Warn about conversion operators that will never be used. */
11179 if (IDENTIFIER_TYPENAME_P (name
)
11180 && ! DECL_TEMPLATE_INFO (decl
)
11182 /* Warn only declaring the function; there is no need to
11183 warn again about out-of-class definitions. */
11184 && class_type
== current_class_type
)
11186 tree t
= TREE_TYPE (name
);
11187 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11190 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11192 if (TREE_CODE (t
) == VOID_TYPE
)
11193 warning (OPT_Wconversion
,
11195 ? G_("conversion to a reference to void "
11196 "will never use a type conversion operator")
11197 : G_("conversion to void "
11198 "will never use a type conversion operator"));
11199 else if (class_type
)
11201 if (t
== class_type
)
11202 warning (OPT_Wconversion
,
11204 ? G_("conversion to a reference to the same type "
11205 "will never use a type conversion operator")
11206 : G_("conversion to the same type "
11207 "will never use a type conversion operator"));
11208 /* Don't force t to be complete here. */
11209 else if (MAYBE_CLASS_TYPE_P (t
)
11210 && COMPLETE_TYPE_P (t
)
11211 && DERIVED_FROM_P (t
, class_type
))
11212 warning (OPT_Wconversion
,
11214 ? G_("conversion to a reference to a base class "
11215 "will never use a type conversion operator")
11216 : G_("conversion to a base class "
11217 "will never use a type conversion operator"));
11222 if (operator_code
== COND_EXPR
)
11225 error ("ISO C++ prohibits overloading operator ?:");
11228 else if (ellipsis_p
)
11230 error ("%qD must not have variable number of arguments", decl
);
11233 else if (ambi_op_p (operator_code
))
11236 /* We pick the one-argument operator codes by default, so
11237 we don't have to change anything. */
11239 else if (arity
== 2)
11241 /* If we thought this was a unary operator, we now know
11242 it to be a binary operator. */
11243 switch (operator_code
)
11246 operator_code
= MULT_EXPR
;
11250 operator_code
= BIT_AND_EXPR
;
11253 case UNARY_PLUS_EXPR
:
11254 operator_code
= PLUS_EXPR
;
11258 operator_code
= MINUS_EXPR
;
11261 case PREINCREMENT_EXPR
:
11262 operator_code
= POSTINCREMENT_EXPR
;
11265 case PREDECREMENT_EXPR
:
11266 operator_code
= POSTDECREMENT_EXPR
;
11270 gcc_unreachable ();
11273 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11275 if ((operator_code
== POSTINCREMENT_EXPR
11276 || operator_code
== POSTDECREMENT_EXPR
)
11277 && ! processing_template_decl
11278 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11281 error ("postfix %qD must take %<int%> as its argument",
11284 error ("postfix %qD must take %<int%> as its second "
11292 error ("%qD must take either zero or one argument", decl
);
11294 error ("%qD must take either one or two arguments", decl
);
11298 /* More Effective C++ rule 6. */
11300 && (operator_code
== POSTINCREMENT_EXPR
11301 || operator_code
== POSTDECREMENT_EXPR
11302 || operator_code
== PREINCREMENT_EXPR
11303 || operator_code
== PREDECREMENT_EXPR
))
11305 tree arg
= TREE_VALUE (argtypes
);
11306 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11307 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11308 arg
= TREE_TYPE (arg
);
11309 arg
= TYPE_MAIN_VARIANT (arg
);
11310 if (operator_code
== PREINCREMENT_EXPR
11311 || operator_code
== PREDECREMENT_EXPR
)
11313 if (TREE_CODE (ret
) != REFERENCE_TYPE
11314 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11316 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11317 build_reference_type (arg
));
11321 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11322 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11326 else if (unary_op_p (operator_code
))
11331 error ("%qD must take %<void%>", decl
);
11333 error ("%qD must take exactly one argument", decl
);
11337 else /* if (binary_op_p (operator_code)) */
11342 error ("%qD must take exactly one argument", decl
);
11344 error ("%qD must take exactly two arguments", decl
);
11348 /* More Effective C++ rule 7. */
11350 && (operator_code
== TRUTH_ANDIF_EXPR
11351 || operator_code
== TRUTH_ORIF_EXPR
11352 || operator_code
== COMPOUND_EXPR
))
11353 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11357 /* Effective C++ rule 23. */
11360 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11361 && (operator_code
== PLUS_EXPR
11362 || operator_code
== MINUS_EXPR
11363 || operator_code
== TRUNC_DIV_EXPR
11364 || operator_code
== MULT_EXPR
11365 || operator_code
== TRUNC_MOD_EXPR
)
11366 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11367 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11369 /* [over.oper]/8 */
11370 for (; argtypes
&& argtypes
!= void_list_node
;
11371 argtypes
= TREE_CHAIN (argtypes
))
11372 if (TREE_PURPOSE (argtypes
))
11374 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11375 if (operator_code
== POSTINCREMENT_EXPR
11376 || operator_code
== POSTDECREMENT_EXPR
)
11378 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
11383 error ("%qD cannot have default arguments", decl
);
11391 /* Return a string giving the keyword associate with CODE. */
11393 static const char *
11394 tag_name (enum tag_types code
)
11406 case typename_type
:
11409 gcc_unreachable ();
11413 /* Name lookup in an elaborated-type-specifier (after the keyword
11414 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11415 elaborated-type-specifier is invalid, issue a diagnostic and return
11416 error_mark_node; otherwise, return the *_TYPE to which it referred.
11417 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11420 check_elaborated_type_specifier (enum tag_types tag_code
,
11422 bool allow_template_p
)
11426 if (decl
== error_mark_node
)
11427 return error_mark_node
;
11431 struct S { struct S *p; };
11433 name lookup will find the TYPE_DECL for the implicit "S::S"
11434 typedef. Adjust for that here. */
11435 if (DECL_SELF_REFERENCE_P (decl
))
11436 decl
= TYPE_NAME (TREE_TYPE (decl
));
11438 type
= TREE_TYPE (decl
);
11440 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11441 is false for this case as well. */
11442 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11444 error ("using template type parameter %qT after %qs",
11445 type
, tag_name (tag_code
));
11446 return error_mark_node
;
11448 /* Accept bound template template parameters. */
11449 else if (allow_template_p
11450 && TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
)
11454 If the identifier resolves to a typedef-name or the
11455 simple-template-id resolves to an alias template
11456 specialization, the elaborated-type-specifier is ill-formed.
11458 In other words, the only legitimate declaration to use in the
11459 elaborated type specifier is the implicit typedef created when
11460 the type is declared. */
11461 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11462 && !DECL_SELF_REFERENCE_P (decl
)
11463 && tag_code
!= typename_type
)
11465 if (alias_template_specialization_p (type
))
11466 error ("using alias template specialization %qT after %qs",
11467 type
, tag_name (tag_code
));
11469 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11470 inform (DECL_SOURCE_LOCATION (decl
),
11471 "%qD has a previous declaration here", decl
);
11472 return error_mark_node
;
11474 else if (TREE_CODE (type
) != RECORD_TYPE
11475 && TREE_CODE (type
) != UNION_TYPE
11476 && tag_code
!= enum_type
11477 && tag_code
!= typename_type
)
11479 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11480 error ("%q+T has a previous declaration here", type
);
11481 return error_mark_node
;
11483 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11484 && tag_code
== enum_type
)
11486 error ("%qT referred to as enum", type
);
11487 error ("%q+T has a previous declaration here", type
);
11488 return error_mark_node
;
11490 else if (!allow_template_p
11491 && TREE_CODE (type
) == RECORD_TYPE
11492 && CLASSTYPE_IS_TEMPLATE (type
))
11494 /* If a class template appears as elaborated type specifier
11495 without a template header such as:
11497 template <class T> class C {};
11498 void f(class C); // No template header here
11500 then the required template argument is missing. */
11501 error ("template argument required for %<%s %T%>",
11502 tag_name (tag_code
),
11503 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11504 return error_mark_node
;
11510 /* Lookup NAME in elaborate type specifier in scope according to
11511 SCOPE and issue diagnostics if necessary.
11512 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11513 found, and ERROR_MARK_NODE for type error. */
11516 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11517 tag_scope scope
, bool template_header_p
)
11521 if (scope
== ts_global
)
11523 /* First try ordinary name lookup, ignoring hidden class name
11524 injected via friend declaration. */
11525 decl
= lookup_name_prefer_type (name
, 2);
11526 /* If that fails, the name will be placed in the smallest
11527 non-class, non-function-prototype scope according to 3.3.1/5.
11528 We may already have a hidden name declared as friend in this
11529 scope. So lookup again but not ignoring hidden names.
11530 If we find one, that name will be made visible rather than
11531 creating a new tag. */
11533 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11536 decl
= lookup_type_scope (name
, scope
);
11538 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
11539 decl
= DECL_TEMPLATE_RESULT (decl
);
11541 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11543 /* Look for invalid nested type:
11547 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11549 error ("%qD has the same name as the class in which it is "
11552 return error_mark_node
;
11555 /* Two cases we need to consider when deciding if a class
11556 template is allowed as an elaborated type specifier:
11557 1. It is a self reference to its own class.
11558 2. It comes with a template header.
11562 template <class T> class C {
11563 class C *c1; // DECL_SELF_REFERENCE_P is true
11566 template <class U> class C; // template_header_p is true
11567 template <class T> class C<T>::D {
11568 class C *c2; // DECL_SELF_REFERENCE_P is true
11571 t
= check_elaborated_type_specifier (tag_code
,
11574 | DECL_SELF_REFERENCE_P (decl
));
11577 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11579 error ("reference to %qD is ambiguous", name
);
11580 print_candidates (decl
);
11581 return error_mark_node
;
11587 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11588 Define the tag as a forward-reference if it is not defined.
11590 If a declaration is given, process it here, and report an error if
11591 multiple declarations are not identical.
11593 SCOPE is TS_CURRENT when this is also a definition. Only look in
11594 the current frame for the name (since C++ allows new names in any
11595 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11596 declaration. Only look beginning from the current scope outward up
11597 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11599 TEMPLATE_HEADER_P is true when this declaration is preceded by
11600 a set of template parameters. */
11603 xref_tag_1 (enum tag_types tag_code
, tree name
,
11604 tag_scope scope
, bool template_header_p
)
11606 enum tree_code code
;
11608 tree context
= NULL_TREE
;
11610 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11616 code
= RECORD_TYPE
;
11622 code
= ENUMERAL_TYPE
;
11625 gcc_unreachable ();
11628 /* In case of anonymous name, xref_tag is only called to
11629 make type node and push name. Name lookup is not required. */
11630 if (ANON_AGGRNAME_P (name
))
11633 t
= lookup_and_check_tag (tag_code
, name
,
11634 scope
, template_header_p
);
11636 if (t
== error_mark_node
)
11637 return error_mark_node
;
11639 if (scope
!= ts_current
&& t
&& current_class_type
11640 && template_class_depth (current_class_type
)
11641 && template_header_p
)
11643 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11644 definition of this tag. Since, in addition, we are currently
11645 processing a (member) template declaration of a template
11646 class, we must be very careful; consider:
11653 { template <class V>
11654 friend struct S1; };
11656 Here, the S2::S1 declaration should not be confused with the
11657 outer declaration. In particular, the inner version should
11658 have a template parameter of level 2, not level 1. This
11659 would be particularly important if the member declaration
11662 template <class V = U> friend struct S1;
11664 say, when we should tsubst into `U' when instantiating
11665 S2. On the other hand, when presented with:
11675 we must find the inner binding eventually. We
11676 accomplish this by making sure that the new type we
11677 create to represent this declaration has the right
11679 context
= TYPE_CONTEXT (t
);
11685 /* If no such tag is yet defined, create a forward-reference node
11686 and record it as the "definition".
11687 When a real declaration of this type is found,
11688 the forward-reference will be altered into a real type. */
11689 if (code
== ENUMERAL_TYPE
)
11691 error ("use of enum %q#D without previous declaration", name
);
11692 return error_mark_node
;
11696 t
= make_class_type (code
);
11697 TYPE_CONTEXT (t
) = context
;
11698 t
= pushtag (name
, t
, scope
);
11703 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11705 if (!redeclare_class_template (t
, current_template_parms
))
11706 return error_mark_node
;
11708 else if (!processing_template_decl
11709 && CLASS_TYPE_P (t
)
11710 && CLASSTYPE_IS_TEMPLATE (t
))
11712 error ("redeclaration of %qT as a non-template", t
);
11713 error ("previous declaration %q+D", t
);
11714 return error_mark_node
;
11717 /* Make injected friend class visible. */
11718 if (scope
!= ts_within_enclosing_non_class
11719 && hidden_name_p (TYPE_NAME (t
)))
11721 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11722 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11724 if (TYPE_TEMPLATE_INFO (t
))
11726 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11727 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11735 /* Wrapper for xref_tag_1. */
11738 xref_tag (enum tag_types tag_code
, tree name
,
11739 tag_scope scope
, bool template_header_p
)
11743 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
11744 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
11745 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
11751 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11753 enum tag_types tag_kind
;
11755 if (TREE_CODE (old
) == RECORD_TYPE
)
11756 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11758 tag_kind
= union_type
;
11760 if (id
== NULL_TREE
)
11761 id
= TYPE_IDENTIFIER (old
);
11763 return xref_tag (tag_kind
, id
, scope
, false);
11766 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11767 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11768 access_* node, and the TREE_VALUE is the type of the base-class.
11769 Non-NULL TREE_TYPE indicates virtual inheritance.
11771 Returns true if the binfo hierarchy was successfully created,
11772 false if an error was detected. */
11775 xref_basetypes (tree ref
, tree base_list
)
11778 tree binfo
, base_binfo
;
11779 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11780 unsigned max_bases
= 0; /* Maximum direct bases. */
11782 tree default_access
;
11783 tree igo_prev
; /* Track Inheritance Graph Order. */
11785 if (ref
== error_mark_node
)
11788 /* The base of a derived class is private by default, all others are
11790 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11791 && CLASSTYPE_DECLARED_CLASS (ref
)
11792 ? access_private_node
: access_public_node
);
11794 /* First, make sure that any templates in base-classes are
11795 instantiated. This ensures that if we call ourselves recursively
11796 we do not get confused about which classes are marked and which
11798 basep
= &base_list
;
11801 tree basetype
= TREE_VALUE (*basep
);
11803 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11804 && !complete_type_or_else (basetype
, NULL
))
11805 /* An incomplete type. Remove it from the list. */
11806 *basep
= TREE_CHAIN (*basep
);
11810 if (TREE_TYPE (*basep
))
11812 if (CLASS_TYPE_P (basetype
))
11813 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11814 basep
= &TREE_CHAIN (*basep
);
11818 TYPE_MARKED_P (ref
) = 1;
11820 /* The binfo slot should be empty, unless this is an (ill-formed)
11822 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11824 error ("redefinition of %q#T", ref
);
11828 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11830 binfo
= make_tree_binfo (max_bases
);
11832 TYPE_BINFO (ref
) = binfo
;
11833 BINFO_OFFSET (binfo
) = size_zero_node
;
11834 BINFO_TYPE (binfo
) = ref
;
11836 /* Apply base-class info set up to the variants of this type. */
11837 fixup_type_variants (ref
);
11841 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11842 /* An aggregate cannot have baseclasses. */
11843 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11845 if (TREE_CODE (ref
) == UNION_TYPE
)
11847 error ("derived union %qT invalid", ref
);
11854 if (TYPE_FOR_JAVA (ref
))
11856 error ("Java class %qT cannot have multiple bases", ref
);
11863 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11865 if (TYPE_FOR_JAVA (ref
))
11867 error ("Java class %qT cannot have virtual bases", ref
);
11872 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11874 tree access
= TREE_PURPOSE (base_list
);
11875 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11876 tree basetype
= TREE_VALUE (base_list
);
11878 if (access
== access_default_node
)
11879 access
= default_access
;
11881 if (PACK_EXPANSION_P (basetype
))
11882 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11883 if (TREE_CODE (basetype
) == TYPE_DECL
)
11884 basetype
= TREE_TYPE (basetype
);
11885 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11887 error ("base type %qT fails to be a struct or class type",
11892 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11893 TYPE_FOR_JAVA (ref
) = 1;
11895 base_binfo
= NULL_TREE
;
11896 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
11898 base_binfo
= TYPE_BINFO (basetype
);
11899 /* The original basetype could have been a typedef'd type. */
11900 basetype
= BINFO_TYPE (base_binfo
);
11902 /* Inherit flags from the base. */
11903 TYPE_HAS_NEW_OPERATOR (ref
)
11904 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11905 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11906 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11907 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11908 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11909 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11910 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11911 CLASSTYPE_REPEATED_BASE_P (ref
)
11912 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11915 /* We must do this test after we've seen through a typedef
11917 if (TYPE_MARKED_P (basetype
))
11919 if (basetype
== ref
)
11920 error ("recursive type %qT undefined", basetype
);
11922 error ("duplicate base type %qT invalid", basetype
);
11926 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11927 /* Regenerate the pack expansion for the bases. */
11928 basetype
= make_pack_expansion (basetype
);
11930 TYPE_MARKED_P (basetype
) = 1;
11932 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11933 &igo_prev
, via_virtual
);
11934 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11935 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11937 BINFO_BASE_APPEND (binfo
, base_binfo
);
11938 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11941 if (VEC_length (tree
, CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
11942 /* If we didn't get max_vbases vbases, we must have shared at
11943 least one of them, and are therefore diamond shaped. */
11944 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11946 /* Unmark all the types. */
11947 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11948 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11949 TYPE_MARKED_P (ref
) = 0;
11951 /* Now see if we have a repeated base type. */
11952 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11954 for (base_binfo
= binfo
; base_binfo
;
11955 base_binfo
= TREE_CHAIN (base_binfo
))
11957 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11959 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11962 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11964 for (base_binfo
= binfo
; base_binfo
;
11965 base_binfo
= TREE_CHAIN (base_binfo
))
11966 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11967 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11976 /* Copies the enum-related properties from type SRC to type DST.
11977 Used with the underlying type of an enum and the enum itself. */
11979 copy_type_enum (tree dst
, tree src
)
11982 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
11984 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
11985 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
11986 TYPE_SIZE (t
) = TYPE_SIZE (src
);
11987 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
11988 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
11989 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
11990 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
11991 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
11992 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
11996 /* Begin compiling the definition of an enumeration type.
11999 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12001 UNDERLYING_TYPE is the type that will be used as the storage for
12002 the enumeration type. This should be NULL_TREE if no storage type
12005 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12007 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12009 Returns the type object, as yet incomplete.
12010 Also records info about it so that build_enumerator
12011 may be used to declare the individual values as they are read. */
12014 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12015 bool scoped_enum_p
, bool *is_new
)
12017 tree prevtype
= NULL_TREE
;
12018 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
12022 /* [C++0x dcl.enum]p5:
12024 If not explicitly specified, the underlying type of a scoped
12025 enumeration type is int. */
12026 if (!underlying_type
&& scoped_enum_p
)
12027 underlying_type
= integer_type_node
;
12029 if (underlying_type
)
12030 underlying_type
= cv_unqualified (underlying_type
);
12032 /* If this is the real definition for a previous forward reference,
12033 fill in the contents in the same object that used to be the
12034 forward reference. */
12036 enumtype
= lookup_and_check_tag (enum_type
, name
,
12037 /*tag_scope=*/ts_current
,
12038 /*template_header_p=*/false);
12040 /* In case of a template_decl, the only check that should be deferred
12041 to instantiation time is the comparison of underlying types. */
12042 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12044 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12046 error_at (input_location
, "scoped/unscoped mismatch "
12047 "in enum %q#T", enumtype
);
12048 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12049 "previous definition here");
12050 enumtype
= error_mark_node
;
12052 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12054 error_at (input_location
, "underlying type mismatch "
12055 "in enum %q#T", enumtype
);
12056 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12057 "previous definition here");
12058 enumtype
= error_mark_node
;
12060 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12061 && !dependent_type_p (underlying_type
)
12062 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12063 && !same_type_p (underlying_type
,
12064 ENUM_UNDERLYING_TYPE (enumtype
)))
12066 error_at (input_location
, "different underlying type "
12067 "in enum %q#T", enumtype
);
12068 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12069 "previous definition here");
12070 underlying_type
= NULL_TREE
;
12074 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12075 || processing_template_decl
)
12077 /* In case of error, make a dummy enum to allow parsing to
12079 if (enumtype
== error_mark_node
)
12081 name
= make_anon_name ();
12082 enumtype
= NULL_TREE
;
12085 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12086 of an opaque enum, or an opaque enum of an already defined
12087 enumeration (C++0x only).
12088 In any other case, it'll be NULL_TREE. */
12094 prevtype
= enumtype
;
12096 /* Do not push the decl more than once, unless we need to
12097 compare underlying types at instantiation time */
12099 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12100 || (underlying_type
12101 && dependent_type_p (underlying_type
))
12102 || (ENUM_UNDERLYING_TYPE (enumtype
)
12103 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12105 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12106 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12109 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12112 if (enumtype
== error_mark_node
)
12113 return error_mark_node
;
12115 /* The enum is considered opaque until the opening '{' of the
12116 enumerator list. */
12117 SET_OPAQUE_ENUM_P (enumtype
, true);
12118 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12121 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12123 if (underlying_type
)
12125 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12127 copy_type_enum (enumtype
, underlying_type
);
12128 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12130 else if (dependent_type_p (underlying_type
))
12131 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12133 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12134 underlying_type
, enumtype
);
12137 /* If into a template class, the returned enum is always the first
12138 declaration (opaque or not) seen. This way all the references to
12139 this type will be to the same declaration. The following ones are used
12140 only to check for definition errors. */
12141 if (prevtype
&& processing_template_decl
)
12147 /* After processing and defining all the values of an enumeration type,
12148 install their decls in the enumeration type.
12149 ENUMTYPE is the type object. */
12152 finish_enum_value_list (tree enumtype
)
12155 tree underlying_type
;
12158 tree minnode
, maxnode
;
12161 bool fixed_underlying_type_p
12162 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12164 /* We built up the VALUES in reverse order. */
12165 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12167 /* For an enum defined in a template, just set the type of the values;
12168 all further processing is postponed until the template is
12169 instantiated. We need to set the type so that tsubst of a CONST_DECL
12171 if (processing_template_decl
)
12173 for (values
= TYPE_VALUES (enumtype
);
12175 values
= TREE_CHAIN (values
))
12176 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12180 /* Determine the minimum and maximum values of the enumerators. */
12181 if (TYPE_VALUES (enumtype
))
12183 minnode
= maxnode
= NULL_TREE
;
12185 for (values
= TYPE_VALUES (enumtype
);
12187 values
= TREE_CHAIN (values
))
12189 decl
= TREE_VALUE (values
);
12191 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12192 each enumerator has the type of its enumeration. Prior to the
12193 closing brace, the type of each enumerator is the type of its
12194 initializing value. */
12195 TREE_TYPE (decl
) = enumtype
;
12197 /* Update the minimum and maximum values, if appropriate. */
12198 value
= DECL_INITIAL (decl
);
12199 if (value
== error_mark_node
)
12200 value
= integer_zero_node
;
12201 /* Figure out what the minimum and maximum values of the
12202 enumerators are. */
12204 minnode
= maxnode
= value
;
12205 else if (tree_int_cst_lt (maxnode
, value
))
12207 else if (tree_int_cst_lt (value
, minnode
))
12214 If the enumerator-list is empty, the underlying type is as if
12215 the enumeration had a single enumerator with value 0. */
12216 minnode
= maxnode
= integer_zero_node
;
12218 if (!fixed_underlying_type_p
)
12220 /* Compute the number of bits require to represent all values of the
12221 enumeration. We must do this before the type of MINNODE and
12222 MAXNODE are transformed, since tree_int_cst_min_precision relies
12223 on the TREE_TYPE of the value it is passed. */
12224 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12225 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12226 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12227 int precision
= MAX (lowprec
, highprec
);
12229 bool use_short_enum
;
12231 /* Determine the underlying type of the enumeration.
12235 The underlying type of an enumeration is an integral type that
12236 can represent all the enumerator values defined in the
12237 enumeration. It is implementation-defined which integral type is
12238 used as the underlying type for an enumeration except that the
12239 underlying type shall not be larger than int unless the value of
12240 an enumerator cannot fit in an int or unsigned int.
12242 We use "int" or an "unsigned int" as the underlying type, even if
12243 a smaller integral type would work, unless the user has
12244 explicitly requested that we use the smallest possible type. The
12245 user can request that for all enumerations with a command line
12246 flag, or for just one enumeration with an attribute. */
12248 use_short_enum
= flag_short_enums
12249 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12251 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12255 underlying_type
= integer_types
[itk
];
12256 if (underlying_type
!= NULL_TREE
12257 && TYPE_PRECISION (underlying_type
) >= precision
12258 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12261 if (itk
== itk_none
)
12265 IF no integral type can represent all the enumerator values, the
12266 enumeration is ill-formed. */
12267 error ("no integral type can represent all of the enumerator values "
12268 "for %qT", enumtype
);
12269 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12270 underlying_type
= integer_types
[itk_unsigned_long_long
];
12275 The value of sizeof() applied to an enumeration type, an object
12276 of an enumeration type, or an enumerator, is the value of sizeof()
12277 applied to the underlying type. */
12278 copy_type_enum (enumtype
, underlying_type
);
12280 /* Compute the minimum and maximum values for the type.
12284 For an enumeration where emin is the smallest enumerator and emax
12285 is the largest, the values of the enumeration are the values of the
12286 underlying type in the range bmin to bmax, where bmin and bmax are,
12287 respectively, the smallest and largest values of the smallest bit-
12288 field that can store emin and emax. */
12290 /* The middle-end currently assumes that types with TYPE_PRECISION
12291 narrower than their underlying type are suitably zero or sign
12292 extended to fill their mode. Similarly, it assumes that the front
12293 end assures that a value of a particular type must be within
12294 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12296 We used to set these fields based on bmin and bmax, but that led
12297 to invalid assumptions like optimizing away bounds checking. So
12298 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12299 TYPE_MAX_VALUE to the values for the mode above and only restrict
12300 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12301 ENUM_UNDERLYING_TYPE (enumtype
)
12302 = build_distinct_type_copy (underlying_type
);
12303 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12304 set_min_and_max_values_for_integral_type
12305 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12307 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12308 if (flag_strict_enums
)
12309 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12313 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12315 /* Convert each of the enumerators to the type of the underlying
12316 type of the enumeration. */
12317 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12319 location_t saved_location
;
12321 decl
= TREE_VALUE (values
);
12322 saved_location
= input_location
;
12323 input_location
= DECL_SOURCE_LOCATION (decl
);
12324 if (fixed_underlying_type_p
)
12325 /* If the enumeration type has a fixed underlying type, we
12326 already checked all of the enumerator values. */
12327 value
= DECL_INITIAL (decl
);
12329 value
= perform_implicit_conversion (underlying_type
,
12330 DECL_INITIAL (decl
),
12331 tf_warning_or_error
);
12332 input_location
= saved_location
;
12334 /* Do not clobber shared ints. */
12335 value
= copy_node (value
);
12337 TREE_TYPE (value
) = enumtype
;
12338 DECL_INITIAL (decl
) = value
;
12341 /* Fix up all variant types of this enum type. */
12342 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12343 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12345 /* Finish debugging output for this type. */
12346 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12349 /* Finishes the enum type. This is called only the first time an
12350 enumeration is seen, be it opaque or odinary.
12351 ENUMTYPE is the type object. */
12354 finish_enum (tree enumtype
)
12356 if (processing_template_decl
)
12358 if (at_function_scope_p ())
12359 add_stmt (build_min (TAG_DEFN
, enumtype
));
12363 /* If this is a forward declaration, there should not be any variants,
12364 though we can get a variant in the middle of an enum-specifier with
12365 wacky code like 'enum E { e = sizeof(const E*) };' */
12366 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12367 && (TYPE_VALUES (enumtype
)
12368 || !TYPE_NEXT_VARIANT (enumtype
)));
12371 /* Build and install a CONST_DECL for an enumeration constant of the
12372 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12373 LOC is the location of NAME.
12374 Assignment of sequential values by default is handled here. */
12377 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12383 /* If the VALUE was erroneous, pretend it wasn't there; that will
12384 result in the enum being assigned the next value in sequence. */
12385 if (value
== error_mark_node
)
12388 /* Remove no-op casts from the value. */
12390 STRIP_TYPE_NOPS (value
);
12392 if (! processing_template_decl
)
12394 /* Validate and default VALUE. */
12395 if (value
!= NULL_TREE
)
12397 value
= cxx_constant_value (value
);
12399 if (TREE_CODE (value
) != INTEGER_CST
12400 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12402 error ("enumerator value for %qD is not an integer constant",
12408 /* Default based on previous value. */
12409 if (value
== NULL_TREE
)
12411 if (TYPE_VALUES (enumtype
))
12414 unsigned HOST_WIDE_INT lo
;
12418 /* C++03 7.2/4: If no initializer is specified for the first
12419 enumerator, the type is an unspecified integral
12420 type. Otherwise the type is the same as the type of the
12421 initializing value of the preceding enumerator unless the
12422 incremented value is not representable in that type, in
12423 which case the type is an unspecified integral type
12424 sufficient to contain the incremented value. */
12425 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12426 if (error_operand_p (prev_value
))
12427 value
= error_mark_node
;
12430 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
12431 TREE_INT_CST_HIGH (prev_value
),
12436 tree type
= TREE_TYPE (prev_value
);
12437 bool pos
= (TYPE_UNSIGNED (type
) || hi
>= 0);
12438 di
.low
= lo
; di
.high
= hi
;
12439 if (!double_int_fits_to_tree_p (type
, di
))
12442 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12444 type
= integer_types
[itk
];
12445 if (type
!= NULL_TREE
12446 && (pos
|| !TYPE_UNSIGNED (type
))
12447 && double_int_fits_to_tree_p (type
, di
))
12450 if (type
&& cxx_dialect
< cxx0x
12451 && itk
> itk_unsigned_long
)
12452 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12453 incremented enumerator value is too large for %<unsigned long%>" : "\
12454 incremented enumerator value is too large for %<long%>");
12456 if (type
== NULL_TREE
)
12459 value
= double_int_to_tree (type
, di
);
12464 error ("overflow in enumeration values at %qD", name
);
12465 value
= error_mark_node
;
12470 value
= integer_zero_node
;
12473 /* Remove no-op casts from the value. */
12474 STRIP_TYPE_NOPS (value
);
12476 /* If the underlying type of the enum is fixed, check whether
12477 the enumerator values fits in the underlying type. If it
12478 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12479 if (ENUM_UNDERLYING_TYPE (enumtype
)
12481 && TREE_CODE (value
) == INTEGER_CST
12482 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12484 error ("enumerator value %E is too large for underlying type %<%T%>",
12485 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12487 /* Silently convert the value so that we can continue. */
12488 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12493 /* C++ associates enums with global, function, or class declarations. */
12494 context
= current_scope ();
12496 /* Build the actual enumeration constant. Note that the enumeration
12497 constants have the underlying type of the enum (if it is fixed)
12498 or the type of their initializer (if the underlying type of the
12499 enum is not fixed):
12503 If the underlying type is fixed, the type of each enumerator
12504 prior to the closing brace is the underlying type; if the
12505 initializing value of an enumerator cannot be represented by
12506 the underlying type, the program is ill-formed. If the
12507 underlying type is not fixed, the type of each enumerator is
12508 the type of its initializing value.
12510 If the underlying type is not fixed, it will be computed by
12511 finish_enum and we will reset the type of this enumerator. Of
12512 course, if we're processing a template, there may be no value. */
12513 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12515 if (context
&& context
== current_class_type
)
12516 /* This enum declaration is local to the class. We need the full
12517 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12518 decl
= build_lang_decl_loc (loc
, CONST_DECL
, name
, type
);
12520 /* It's a global enum, or it's local to a function. (Note local to
12521 a function could mean local to a class method. */
12522 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12524 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12525 TREE_CONSTANT (decl
) = 1;
12526 TREE_READONLY (decl
) = 1;
12527 DECL_INITIAL (decl
) = value
;
12529 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12530 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12531 on the TYPE_FIELDS list for `S'. (That's so that you can say
12532 things like `S::i' later.) */
12533 finish_member_declaration (decl
);
12537 /* Add this enumeration constant to the list for this type. */
12538 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12541 /* Look for an enumerator with the given NAME within the enumeration
12542 type ENUMTYPE. This routine is used primarily for qualified name
12543 lookup into an enumerator in C++0x, e.g.,
12545 enum class Color { Red, Green, Blue };
12547 Color color = Color::Red;
12549 Returns the value corresponding to the enumerator, or
12550 NULL_TREE if no such enumerator was found. */
12552 lookup_enumerator (tree enumtype
, tree name
)
12555 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12557 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12558 return e
? TREE_VALUE (e
) : NULL_TREE
;
12562 /* We're defining DECL. Make sure that its type is OK. */
12565 check_function_type (tree decl
, tree current_function_parms
)
12567 tree fntype
= TREE_TYPE (decl
);
12568 tree return_type
= complete_type (TREE_TYPE (fntype
));
12570 /* In a function definition, arg types must be complete. */
12571 require_complete_types_for_parms (current_function_parms
);
12573 if (dependent_type_p (return_type
))
12575 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12576 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12578 tree args
= TYPE_ARG_TYPES (fntype
);
12580 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12581 error ("return type %q#T is incomplete", return_type
);
12583 error ("return type has Java class type %q#T", return_type
);
12585 /* Make it return void instead. */
12586 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12587 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12589 TREE_CHAIN (args
));
12591 fntype
= build_function_type (void_type_node
, args
);
12593 = build_exception_variant (fntype
,
12594 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12595 fntype
= (cp_build_type_attribute_variant
12596 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12597 TREE_TYPE (decl
) = fntype
;
12600 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12603 /* Create the FUNCTION_DECL for a function definition.
12604 DECLSPECS and DECLARATOR are the parts of the declaration;
12605 they describe the function's name and the type it returns,
12606 but twisted together in a fashion that parallels the syntax of C.
12608 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12609 DECLARATOR is really the DECL for the function we are about to
12610 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12611 indicating that the function is an inline defined in-class.
12613 This function creates a binding context for the function body
12614 as well as setting up the FUNCTION_DECL in current_function_decl.
12616 For C++, we must first check whether that datum makes any sense.
12617 For example, "class A local_a(1,2);" means that variable local_a
12618 is an aggregate of type A, which should have a constructor
12619 applied to it with the argument list [1, 2].
12621 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12622 or may be a BLOCK if the function has been defined previously
12623 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12624 error_mark_node if the function has never been defined, or
12625 a BLOCK if the function has been defined somewhere. */
12628 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12630 tree ctype
= NULL_TREE
;
12633 int doing_friend
= 0;
12634 cp_binding_level
*bl
;
12635 tree current_function_parms
;
12636 struct c_fileinfo
*finfo
12637 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12638 bool honor_interface
;
12640 /* Sanity check. */
12641 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12642 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12644 fntype
= TREE_TYPE (decl1
);
12645 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12646 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12648 /* ISO C++ 11.4/5. A friend function defined in a class is in
12649 the (lexical) scope of the class in which it is defined. */
12650 if (!ctype
&& DECL_FRIEND_P (decl1
))
12652 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12654 /* CTYPE could be null here if we're dealing with a template;
12655 for example, `inline friend float foo()' inside a template
12656 will have no CTYPE set. */
12657 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12663 if (DECL_DECLARED_INLINE_P (decl1
)
12664 && lookup_attribute ("noinline", attrs
))
12665 warning (0, "inline function %q+D given attribute noinline", decl1
);
12667 /* Handle gnu_inline attribute. */
12668 if (GNU_INLINE_P (decl1
))
12670 DECL_EXTERNAL (decl1
) = 1;
12671 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12672 DECL_INTERFACE_KNOWN (decl1
) = 1;
12673 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12676 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12677 /* This is a constructor, we must ensure that any default args
12678 introduced by this definition are propagated to the clones
12679 now. The clones are used directly in overload resolution. */
12680 adjust_clone_args (decl1
);
12682 /* Sometimes we don't notice that a function is a static member, and
12683 build a METHOD_TYPE for it. Fix that up now. */
12684 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12685 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12687 /* Set up current_class_type, and enter the scope of the class, if
12690 push_nested_class (ctype
);
12691 else if (DECL_STATIC_FUNCTION_P (decl1
))
12692 push_nested_class (DECL_CONTEXT (decl1
));
12694 /* Now that we have entered the scope of the class, we must restore
12695 the bindings for any template parameters surrounding DECL1, if it
12696 is an inline member template. (Order is important; consider the
12697 case where a template parameter has the same name as a field of
12698 the class.) It is not until after this point that
12699 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12700 if (flags
& SF_INCLASS_INLINE
)
12701 maybe_begin_member_template_processing (decl1
);
12703 /* Effective C++ rule 15. */
12705 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12706 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12707 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
12709 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12710 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12711 if (!DECL_INITIAL (decl1
))
12712 DECL_INITIAL (decl1
) = error_mark_node
;
12714 /* This function exists in static storage.
12715 (This does not mean `static' in the C sense!) */
12716 TREE_STATIC (decl1
) = 1;
12718 /* We must call push_template_decl after current_class_type is set
12719 up. (If we are processing inline definitions after exiting a
12720 class scope, current_class_type will be NULL_TREE until set above
12721 by push_nested_class.) */
12722 if (processing_template_decl
)
12724 /* FIXME: Handle error_mark_node more gracefully. */
12725 tree newdecl1
= push_template_decl (decl1
);
12726 if (newdecl1
!= error_mark_node
)
12730 /* We are now in the scope of the function being defined. */
12731 current_function_decl
= decl1
;
12733 /* Save the parm names or decls from this function's declarator
12734 where store_parm_decls will find them. */
12735 current_function_parms
= DECL_ARGUMENTS (decl1
);
12737 /* Make sure the parameter and return types are reasonable. When
12738 you declare a function, these types can be incomplete, but they
12739 must be complete when you define the function. */
12740 check_function_type (decl1
, current_function_parms
);
12742 /* Build the return declaration for the function. */
12743 restype
= TREE_TYPE (fntype
);
12744 if (DECL_RESULT (decl1
) == NULL_TREE
)
12748 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
12749 DECL_ARTIFICIAL (resdecl
) = 1;
12750 DECL_IGNORED_P (resdecl
) = 1;
12751 DECL_RESULT (decl1
) = resdecl
;
12753 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
12756 /* Let the user know we're compiling this function. */
12757 announce_function (decl1
);
12759 /* Record the decl so that the function name is defined.
12760 If we already have a decl for this name, and it is a FUNCTION_DECL,
12761 use the old decl. */
12762 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12764 /* A specialization is not used to guide overload resolution. */
12765 if (!DECL_FUNCTION_MEMBER_P (decl1
)
12766 && !(DECL_USE_TEMPLATE (decl1
) &&
12767 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
12769 tree olddecl
= pushdecl (decl1
);
12771 if (olddecl
== error_mark_node
)
12772 /* If something went wrong when registering the declaration,
12773 use DECL1; we have to have a FUNCTION_DECL to use when
12774 parsing the body of the function. */
12778 /* Otherwise, OLDDECL is either a previous declaration
12779 of the same function or DECL1 itself. */
12781 if (warn_missing_declarations
12782 && olddecl
== decl1
12783 && !DECL_MAIN_P (decl1
)
12784 && TREE_PUBLIC (decl1
)
12785 && !DECL_DECLARED_INLINE_P (decl1
))
12789 /* Check whether DECL1 is in an anonymous
12791 for (context
= DECL_CONTEXT (decl1
);
12793 context
= DECL_CONTEXT (context
))
12795 if (TREE_CODE (context
) == NAMESPACE_DECL
12796 && DECL_NAME (context
) == NULL_TREE
)
12800 if (context
== NULL
)
12801 warning (OPT_Wmissing_declarations
,
12802 "no previous declaration for %q+D", decl1
);
12810 /* We need to set the DECL_CONTEXT. */
12811 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12812 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12814 fntype
= TREE_TYPE (decl1
);
12816 /* If #pragma weak applies, mark the decl appropriately now.
12817 The pragma only applies to global functions. Because
12818 determining whether or not the #pragma applies involves
12819 computing the mangled name for the declaration, we cannot
12820 apply the pragma until after we have merged this declaration
12821 with any previous declarations; if the original declaration
12822 has a linkage specification, that specification applies to
12823 the definition as well, and may affect the mangled name. */
12824 if (DECL_FILE_SCOPE_P (decl1
))
12825 maybe_apply_pragma_weak (decl1
);
12828 /* Reset this in case the call to pushdecl changed it. */
12829 current_function_decl
= decl1
;
12831 gcc_assert (DECL_INITIAL (decl1
));
12833 /* This function may already have been parsed, in which case just
12834 return; our caller will skip over the body without parsing. */
12835 if (DECL_INITIAL (decl1
) != error_mark_node
)
12838 /* Initialize RTL machinery. We cannot do this until
12839 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12840 even when processing a template; this is how we get
12841 CFUN set up, and our per-function variables initialized.
12842 FIXME factor out the non-RTL stuff. */
12843 bl
= current_binding_level
;
12844 allocate_struct_function (decl1
, processing_template_decl
);
12846 /* Initialize the language data structures. Whenever we start
12847 a new function, we destroy temporaries in the usual way. */
12848 cfun
->language
= ggc_alloc_cleared_language_function ();
12849 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12850 current_binding_level
= bl
;
12852 /* Start the statement-tree, start the tree now. */
12853 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12855 /* If we are (erroneously) defining a function that we have already
12856 defined before, wipe out what we knew before. */
12857 if (!DECL_PENDING_INLINE_P (decl1
))
12858 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12860 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12862 /* We know that this was set up by `grokclassfn'. We do not
12863 wait until `store_parm_decls', since evil parse errors may
12864 never get us to that point. Here we keep the consistency
12865 between `current_class_type' and `current_class_ptr'. */
12866 tree t
= DECL_ARGUMENTS (decl1
);
12868 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12869 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12871 cp_function_chain
->x_current_class_ref
12872 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12873 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12874 cp_function_chain
->x_current_class_ptr
= t
;
12876 /* Constructors and destructors need to know whether they're "in
12877 charge" of initializing virtual base classes. */
12878 t
= DECL_CHAIN (t
);
12879 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12881 current_in_charge_parm
= t
;
12882 t
= DECL_CHAIN (t
);
12884 if (DECL_HAS_VTT_PARM_P (decl1
))
12886 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12887 current_vtt_parm
= t
;
12891 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12892 /* Implicitly-defined methods (like the
12893 destructor for a class in which no destructor
12894 is explicitly declared) must not be defined
12895 until their definition is needed. So, we
12896 ignore interface specifications for
12897 compiler-generated functions. */
12898 && !DECL_ARTIFICIAL (decl1
));
12900 if (processing_template_decl
)
12901 /* Don't mess with interface flags. */;
12902 else if (DECL_INTERFACE_KNOWN (decl1
))
12904 tree ctx
= decl_function_context (decl1
);
12906 if (DECL_NOT_REALLY_EXTERN (decl1
))
12907 DECL_EXTERNAL (decl1
) = 0;
12909 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12910 && TREE_PUBLIC (ctx
))
12911 /* This is a function in a local class in an extern inline
12913 comdat_linkage (decl1
);
12915 /* If this function belongs to an interface, it is public.
12916 If it belongs to someone else's interface, it is also external.
12917 This only affects inlines and template instantiations. */
12918 else if (!finfo
->interface_unknown
&& honor_interface
)
12920 if (DECL_DECLARED_INLINE_P (decl1
)
12921 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12923 DECL_EXTERNAL (decl1
)
12924 = (finfo
->interface_only
12925 || (DECL_DECLARED_INLINE_P (decl1
)
12926 && ! flag_implement_inlines
12927 && !DECL_VINDEX (decl1
)));
12929 /* For WIN32 we also want to put these in linkonce sections. */
12930 maybe_make_one_only (decl1
);
12933 DECL_EXTERNAL (decl1
) = 0;
12934 DECL_INTERFACE_KNOWN (decl1
) = 1;
12935 /* If this function is in an interface implemented in this file,
12936 make sure that the back end knows to emit this function
12938 if (!DECL_EXTERNAL (decl1
))
12939 mark_needed (decl1
);
12941 else if (finfo
->interface_unknown
&& finfo
->interface_only
12942 && honor_interface
)
12944 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12945 interface, we will have both finfo->interface_unknown and
12946 finfo->interface_only set. In that case, we don't want to
12947 use the normal heuristics because someone will supply a
12948 #pragma implementation elsewhere, and deducing it here would
12949 produce a conflict. */
12950 comdat_linkage (decl1
);
12951 DECL_EXTERNAL (decl1
) = 0;
12952 DECL_INTERFACE_KNOWN (decl1
) = 1;
12953 DECL_DEFER_OUTPUT (decl1
) = 1;
12957 /* This is a definition, not a reference.
12958 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12959 if (!GNU_INLINE_P (decl1
))
12960 DECL_EXTERNAL (decl1
) = 0;
12962 if ((DECL_DECLARED_INLINE_P (decl1
)
12963 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12964 && ! DECL_INTERFACE_KNOWN (decl1
))
12965 DECL_DEFER_OUTPUT (decl1
) = 1;
12967 DECL_INTERFACE_KNOWN (decl1
) = 1;
12970 /* Determine the ELF visibility attribute for the function. We must not
12971 do this before calling "pushdecl", as we must allow "duplicate_decls"
12972 to merge any attributes appropriately. We also need to wait until
12974 if (!DECL_CLONED_FUNCTION_P (decl1
))
12975 determine_visibility (decl1
);
12977 begin_scope (sk_function_parms
, decl1
);
12981 if (DECL_DESTRUCTOR_P (decl1
)
12982 || (DECL_CONSTRUCTOR_P (decl1
)
12983 && targetm
.cxx
.cdtor_returns_this ()))
12985 cdtor_label
= build_decl (input_location
,
12986 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12987 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12990 start_fname_decls ();
12992 store_parm_decls (current_function_parms
);
12996 /* Like start_preparsed_function, except that instead of a
12997 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12999 Returns 1 on success. If the DECLARATOR is not suitable for a function
13000 (it defines a datum instead), we return 0, which tells
13001 yyparse to report a parse error. */
13004 start_function (cp_decl_specifier_seq
*declspecs
,
13005 const cp_declarator
*declarator
,
13010 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13011 if (decl1
== error_mark_node
)
13013 /* If the declarator is not suitable for a function definition,
13014 cause a syntax error. */
13015 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13017 error ("invalid function declaration");
13021 if (DECL_MAIN_P (decl1
))
13022 /* main must return int. grokfndecl should have corrected it
13023 (and issued a diagnostic) if the user got it wrong. */
13024 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13025 integer_type_node
));
13027 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13032 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13036 use_eh_spec_block (tree fn
)
13038 return (flag_exceptions
&& flag_enforce_eh_specs
13039 && !processing_template_decl
13040 && !type_throw_all_p (TREE_TYPE (fn
))
13041 /* We insert the EH_SPEC_BLOCK only in the original
13042 function; then, it is copied automatically to the
13044 && !DECL_CLONED_FUNCTION_P (fn
)
13045 /* Implicitly-generated constructors and destructors have
13046 exception specifications. However, those specifications
13047 are the union of the possible exceptions specified by the
13048 constructors/destructors for bases and members, so no
13049 unallowed exception will ever reach this function. By
13050 not creating the EH_SPEC_BLOCK we save a little memory,
13051 and we avoid spurious warnings about unreachable
13053 && !DECL_DEFAULTED_FN (fn
));
13056 /* Store the parameter declarations into the current function declaration.
13057 This is called after parsing the parameter declarations, before
13058 digesting the body of the function.
13060 Also install to binding contour return value identifier, if any. */
13063 store_parm_decls (tree current_function_parms
)
13065 tree fndecl
= current_function_decl
;
13068 /* This is a chain of any other decls that came in among the parm
13069 declarations. If a parm is declared with enum {foo, bar} x;
13070 then CONST_DECLs for foo and bar are put here. */
13071 tree nonparms
= NULL_TREE
;
13073 if (current_function_parms
)
13075 /* This case is when the function was defined with an ANSI prototype.
13076 The parms already have decls, so we need not do anything here
13077 except record them as in effect
13078 and complain if any redundant old-style parm decls were written. */
13080 tree specparms
= current_function_parms
;
13083 /* Must clear this because it might contain TYPE_DECLs declared
13085 current_binding_level
->names
= NULL
;
13087 /* If we're doing semantic analysis, then we'll call pushdecl
13088 for each of these. We must do them in reverse order so that
13089 they end in the correct forward order. */
13090 specparms
= nreverse (specparms
);
13092 for (parm
= specparms
; parm
; parm
= next
)
13094 next
= DECL_CHAIN (parm
);
13095 if (TREE_CODE (parm
) == PARM_DECL
)
13097 if (DECL_NAME (parm
) == NULL_TREE
13098 || TREE_CODE (parm
) != VOID_TYPE
)
13101 error ("parameter %qD declared void", parm
);
13105 /* If we find an enum constant or a type tag,
13106 put it aside for the moment. */
13107 TREE_CHAIN (parm
) = NULL_TREE
;
13108 nonparms
= chainon (nonparms
, parm
);
13112 /* Get the decls in their original chain order and record in the
13113 function. This is all and only the PARM_DECLs that were
13114 pushed into scope by the loop above. */
13115 DECL_ARGUMENTS (fndecl
) = getdecls ();
13118 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13120 /* Now store the final chain of decls for the arguments
13121 as the decl-chain of the current lexical scope.
13122 Put the enumerators in as well, at the front so that
13123 DECL_ARGUMENTS is not modified. */
13124 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13126 if (use_eh_spec_block (current_function_decl
))
13127 current_eh_spec_block
= begin_eh_spec_block ();
13131 /* We have finished doing semantic analysis on DECL, but have not yet
13132 generated RTL for its body. Save away our current state, so that
13133 when we want to generate RTL later we know what to do. */
13136 save_function_data (tree decl
)
13138 struct language_function
*f
;
13140 /* Save the language-specific per-function data so that we can
13141 get it back when we really expand this function. */
13142 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13145 f
= ggc_alloc_language_function ();
13146 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13147 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13149 /* Clear out the bits we don't need. */
13150 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13151 f
->bindings
= NULL
;
13152 f
->x_local_names
= NULL
;
13153 f
->base
.local_typedefs
= NULL
;
13157 /* Set the return value of the constructor (if present). */
13160 finish_constructor_body (void)
13165 if (targetm
.cxx
.cdtor_returns_this ()
13166 && (! TYPE_FOR_JAVA (current_class_type
)))
13168 /* Any return from a constructor will end up here. */
13169 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13171 val
= DECL_ARGUMENTS (current_function_decl
);
13172 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13173 DECL_RESULT (current_function_decl
), val
);
13174 /* Return the address of the object. */
13175 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13176 add_stmt (exprstmt
);
13180 /* Do all the processing for the beginning of a destructor; set up the
13181 vtable pointers and cleanups for bases and members. */
13184 begin_destructor_body (void)
13186 tree compound_stmt
;
13188 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13189 issued an error message. We still want to try to process the
13190 body of the function, but initialize_vtbl_ptrs will crash if
13191 TYPE_BINFO is NULL. */
13192 if (COMPLETE_TYPE_P (current_class_type
))
13194 compound_stmt
= begin_compound_stmt (0);
13195 /* Make all virtual function table pointers in non-virtual base
13196 classes point to CURRENT_CLASS_TYPE's virtual function
13198 initialize_vtbl_ptrs (current_class_ptr
);
13199 finish_compound_stmt (compound_stmt
);
13201 /* And insert cleanups for our bases and members so that they
13202 will be properly destroyed if we throw. */
13203 push_base_cleanups ();
13207 /* At the end of every destructor we generate code to delete the object if
13208 necessary. Do that now. */
13211 finish_destructor_body (void)
13215 /* Any return from a destructor will end up here; that way all base
13216 and member cleanups will be run when the function returns. */
13217 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13219 /* In a virtual destructor, we must call delete. */
13220 if (DECL_VIRTUAL_P (current_function_decl
))
13223 tree virtual_size
= cxx_sizeof (current_class_type
);
13227 At the point of definition of a virtual destructor (including
13228 an implicit definition), non-placement operator delete shall
13229 be looked up in the scope of the destructor's class and if
13230 found shall be accessible and unambiguous. */
13231 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
13233 /*global_p=*/false,
13234 /*placement=*/NULL_TREE
,
13235 /*alloc_fn=*/NULL_TREE
);
13237 if_stmt
= begin_if_stmt ();
13238 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13239 current_in_charge_parm
,
13242 finish_expr_stmt (exprstmt
);
13243 finish_then_clause (if_stmt
);
13244 finish_if_stmt (if_stmt
);
13247 if (targetm
.cxx
.cdtor_returns_this ())
13251 val
= DECL_ARGUMENTS (current_function_decl
);
13252 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13253 DECL_RESULT (current_function_decl
), val
);
13254 /* Return the address of the object. */
13255 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13256 add_stmt (exprstmt
);
13260 /* Do the necessary processing for the beginning of a function body, which
13261 in this case includes member-initializers, but not the catch clauses of
13262 a function-try-block. Currently, this means opening a binding level
13263 for the member-initializers (in a ctor), member cleanups (in a dtor),
13264 and capture proxies (in a lambda operator()). */
13267 begin_function_body (void)
13271 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13274 if (processing_template_decl
)
13275 /* Do nothing now. */;
13277 /* Always keep the BLOCK node associated with the outermost pair of
13278 curly braces of a function. These are needed for correct
13279 operation of dwarfout.c. */
13280 keep_next_level (true);
13282 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13284 if (processing_template_decl
)
13285 /* Do nothing now. */;
13286 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13287 begin_destructor_body ();
13292 /* Do the processing for the end of a function body. Currently, this means
13293 closing out the cleanups for fully-constructed bases and members, and in
13294 the case of the destructor, deleting the object if desired. Again, this
13295 is only meaningful for [cd]tors, since they are the only functions where
13296 there is a significant distinction between the main body and any
13297 function catch clauses. Handling, say, main() return semantics here
13298 would be wrong, as flowing off the end of a function catch clause for
13299 main() would also need to return 0. */
13302 finish_function_body (tree compstmt
)
13304 if (compstmt
== NULL_TREE
)
13307 /* Close the block. */
13308 finish_compound_stmt (compstmt
);
13310 if (processing_template_decl
)
13311 /* Do nothing now. */;
13312 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13313 finish_constructor_body ();
13314 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13315 finish_destructor_body ();
13318 /* Given a function, returns the BLOCK corresponding to the outermost level
13319 of curly braces, skipping the artificial block created for constructor
13323 outer_curly_brace_block (tree fndecl
)
13325 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13326 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13327 /* Skip the artificial function body block. */
13328 block
= BLOCK_SUBBLOCKS (block
);
13332 /* If FNDECL is a class's key method, add the class to the list of
13333 keyed classes that should be emitted. */
13336 record_key_method_defined (tree fndecl
)
13338 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13339 && DECL_VIRTUAL_P (fndecl
)
13340 && !processing_template_decl
)
13342 tree fnclass
= DECL_CONTEXT (fndecl
);
13343 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13344 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13348 /* Subroutine of finish_function.
13349 Save the body of constexpr functions for possible
13350 future compile time evaluation. */
13353 maybe_save_function_definition (tree fun
)
13355 if (!processing_template_decl
13356 && DECL_DECLARED_CONSTEXPR_P (fun
)
13357 && !DECL_CLONED_FUNCTION_P (fun
))
13358 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13361 /* Finish up a function declaration and compile that function
13362 all the way to assembler language output. The free the storage
13363 for the function definition.
13365 FLAGS is a bitwise or of the following values:
13367 We just finished processing the body of an in-class inline
13368 function definition. (This processing will have taken place
13369 after the class definition is complete.) */
13372 finish_function (int flags
)
13374 tree fndecl
= current_function_decl
;
13375 tree fntype
, ctype
= NULL_TREE
;
13376 int inclass_inline
= (flags
& 2) != 0;
13378 /* When we get some parse errors, we can end up without a
13379 current_function_decl, so cope. */
13380 if (fndecl
== NULL_TREE
)
13381 return error_mark_node
;
13383 if (c_dialect_objc ())
13384 objc_finish_function ();
13386 gcc_assert (!defer_mark_used_calls
);
13387 defer_mark_used_calls
= true;
13389 record_key_method_defined (fndecl
);
13391 fntype
= TREE_TYPE (fndecl
);
13393 /* TREE_READONLY (fndecl) = 1;
13394 This caused &foo to be of type ptr-to-const-function
13395 which then got a warning when stored in a ptr-to-function variable. */
13397 gcc_assert (building_stmt_list_p ());
13398 /* The current function is being defined, so its DECL_INITIAL should
13399 be set, and unless there's a multiple definition, it should be
13400 error_mark_node. */
13401 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13403 /* For a cloned function, we've already got all the code we need;
13404 there's no need to add any extra bits. */
13405 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13407 if (DECL_MAIN_P (current_function_decl
))
13409 /* Make it so that `main' always returns 0 by default (or
13412 finish_return_stmt (integer_one_node
);
13414 finish_return_stmt (integer_zero_node
);
13418 if (use_eh_spec_block (current_function_decl
))
13419 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13420 (TREE_TYPE (current_function_decl
)),
13421 current_eh_spec_block
);
13424 /* If we're saving up tree structure, tie off the function now. */
13425 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13427 finish_fname_decls ();
13429 /* If this function can't throw any exceptions, remember that. */
13430 if (!processing_template_decl
13431 && !cp_function_chain
->can_throw
13432 && !flag_non_call_exceptions
13433 && !decl_replaceable_p (fndecl
))
13434 TREE_NOTHROW (fndecl
) = 1;
13436 /* This must come after expand_function_end because cleanups might
13437 have declarations (from inline functions) that need to go into
13438 this function's blocks. */
13440 /* If the current binding level isn't the outermost binding level
13441 for this function, either there is a bug, or we have experienced
13442 syntax errors and the statement tree is malformed. */
13443 if (current_binding_level
->kind
!= sk_function_parms
)
13445 /* Make sure we have already experienced errors. */
13446 gcc_assert (errorcount
);
13448 /* Throw away the broken statement tree and extra binding
13450 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13452 while (current_binding_level
->kind
!= sk_function_parms
)
13454 if (current_binding_level
->kind
== sk_class
)
13455 pop_nested_class ();
13457 poplevel (0, 0, 0);
13460 poplevel (1, 0, 1);
13462 /* Statements should always be full-expressions at the outermost set
13463 of curly braces for a function. */
13464 gcc_assert (stmts_are_full_exprs_p ());
13466 /* Save constexpr function body before it gets munged by
13467 the NRV transformation. */
13468 maybe_save_function_definition (fndecl
);
13470 /* Set up the named return value optimization, if we can. Candidate
13471 variables are selected in check_return_expr. */
13472 if (current_function_return_value
)
13474 tree r
= current_function_return_value
;
13477 if (r
!= error_mark_node
13478 /* This is only worth doing for fns that return in memory--and
13479 simpler, since we don't have to worry about promoted modes. */
13480 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13481 /* Only allow this for variables declared in the outer scope of
13482 the function so we know that their lifetime always ends with a
13483 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13484 we were to do this optimization in tree-ssa. */
13485 && (outer
= outer_curly_brace_block (fndecl
))
13486 && chain_member (r
, BLOCK_VARS (outer
)))
13487 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13489 current_function_return_value
= NULL_TREE
;
13492 /* Remember that we were in class scope. */
13493 if (current_class_name
)
13494 ctype
= current_class_type
;
13496 /* Must mark the RESULT_DECL as being in this function. */
13497 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13499 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13500 to the FUNCTION_DECL node itself. */
13501 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13503 /* Save away current state, if appropriate. */
13504 if (!processing_template_decl
)
13505 save_function_data (fndecl
);
13507 /* Complain if there's just no return statement. */
13508 if (warn_return_type
13509 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13510 && !dependent_type_p (TREE_TYPE (fntype
))
13511 && !current_function_returns_value
&& !current_function_returns_null
13512 /* Don't complain if we abort or throw. */
13513 && !current_function_returns_abnormally
13514 /* Don't complain if we are declared noreturn. */
13515 && !TREE_THIS_VOLATILE (fndecl
)
13516 && !DECL_NAME (DECL_RESULT (fndecl
))
13517 && !TREE_NO_WARNING (fndecl
)
13518 /* Structor return values (if any) are set by the compiler. */
13519 && !DECL_CONSTRUCTOR_P (fndecl
)
13520 && !DECL_DESTRUCTOR_P (fndecl
))
13522 warning (OPT_Wreturn_type
,
13523 "no return statement in function returning non-void");
13524 TREE_NO_WARNING (fndecl
) = 1;
13527 /* Store the end of the function, so that we get good line number
13528 info for the epilogue. */
13529 cfun
->function_end_locus
= input_location
;
13531 /* Complain about parameters that are only set, but never otherwise used. */
13532 if (warn_unused_but_set_parameter
13533 && !processing_template_decl
13534 && errorcount
== unused_but_set_errorcount
13535 && !DECL_CLONED_FUNCTION_P (fndecl
))
13539 for (decl
= DECL_ARGUMENTS (fndecl
);
13541 decl
= DECL_CHAIN (decl
))
13542 if (TREE_USED (decl
)
13543 && TREE_CODE (decl
) == PARM_DECL
13544 && !DECL_READ_P (decl
)
13545 && DECL_NAME (decl
)
13546 && !DECL_ARTIFICIAL (decl
)
13547 && !TREE_NO_WARNING (decl
)
13548 && !DECL_IN_SYSTEM_HEADER (decl
)
13549 && TREE_TYPE (decl
) != error_mark_node
13550 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13551 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13552 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13553 warning (OPT_Wunused_but_set_parameter
,
13554 "parameter %q+D set but not used", decl
);
13555 unused_but_set_errorcount
= errorcount
;
13558 /* Complain about locally defined typedefs that are not used in this
13560 maybe_warn_unused_local_typedefs ();
13562 /* Genericize before inlining. */
13563 if (!processing_template_decl
)
13565 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13566 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13567 cp_genericize (fndecl
);
13568 /* Clear out the bits we don't need. */
13569 f
->x_current_class_ptr
= NULL
;
13570 f
->x_current_class_ref
= NULL
;
13571 f
->x_eh_spec_block
= NULL
;
13572 f
->x_in_charge_parm
= NULL
;
13573 f
->x_vtt_parm
= NULL
;
13574 f
->x_return_value
= NULL
;
13575 f
->bindings
= NULL
;
13576 f
->extern_decl_map
= NULL
;
13578 /* Clear out the bits we don't need. */
13579 local_names
= NULL
;
13581 /* We're leaving the context of this function, so zap cfun. It's still in
13582 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13584 current_function_decl
= NULL
;
13586 /* If this is an in-class inline definition, we may have to pop the
13587 bindings for the template parameters that we added in
13588 maybe_begin_member_template_processing when start_function was
13590 if (inclass_inline
)
13591 maybe_end_member_template_processing ();
13593 /* Leave the scope of the class. */
13595 pop_nested_class ();
13600 current_function_decl
= NULL_TREE
;
13602 defer_mark_used_calls
= false;
13603 if (deferred_mark_used_calls
)
13608 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13610 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13616 /* Create the FUNCTION_DECL for a function definition.
13617 DECLSPECS and DECLARATOR are the parts of the declaration;
13618 they describe the return type and the name of the function,
13619 but twisted together in a fashion that parallels the syntax of C.
13621 This function creates a binding context for the function body
13622 as well as setting up the FUNCTION_DECL in current_function_decl.
13624 Returns a FUNCTION_DECL on success.
13626 If the DECLARATOR is not suitable for a function (it defines a datum
13627 instead), we return 0, which tells yyparse to report a parse error.
13629 May return void_type_node indicating that this method is actually
13630 a friend. See grokfield for more details.
13632 Came here with a `.pushlevel' .
13634 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13635 CHANGES TO CODE IN `grokfield'. */
13638 grokmethod (cp_decl_specifier_seq
*declspecs
,
13639 const cp_declarator
*declarator
, tree attrlist
)
13641 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13644 if (fndecl
== error_mark_node
)
13645 return error_mark_node
;
13647 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13649 error ("invalid member function declaration");
13650 return error_mark_node
;
13654 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13656 /* Pass friends other than inline friend functions back. */
13657 if (fndecl
== void_type_node
)
13660 if (DECL_IN_AGGR_P (fndecl
))
13662 if (DECL_CLASS_SCOPE_P (fndecl
))
13663 error ("%qD is already defined in class %qT", fndecl
,
13664 DECL_CONTEXT (fndecl
));
13665 return error_mark_node
;
13668 check_template_shadow (fndecl
);
13670 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13671 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13673 /* We process method specializations in finish_struct_1. */
13674 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13676 fndecl
= push_template_decl (fndecl
);
13677 if (fndecl
== error_mark_node
)
13681 if (! DECL_FRIEND_P (fndecl
))
13683 if (DECL_CHAIN (fndecl
))
13685 fndecl
= copy_node (fndecl
);
13686 TREE_CHAIN (fndecl
) = NULL_TREE
;
13690 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
13692 DECL_IN_AGGR_P (fndecl
) = 1;
13697 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13698 we can lay it out later, when and if its type becomes complete. */
13701 maybe_register_incomplete_var (tree var
)
13703 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
13705 /* Keep track of variables with incomplete types. */
13706 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
13707 && DECL_EXTERNAL (var
))
13709 tree inner_type
= TREE_TYPE (var
);
13711 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
13712 inner_type
= TREE_TYPE (inner_type
);
13713 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
13715 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
13716 /* RTTI TD entries are created while defining the type_info. */
13717 || (TYPE_LANG_SPECIFIC (inner_type
)
13718 && TYPE_BEING_DEFINED (inner_type
)))
13721 = VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, NULL
);
13723 iv
->incomplete_type
= inner_type
;
13728 /* Called when a class type (given by TYPE) is defined. If there are
13729 any existing VAR_DECLs whose type has been completed by this
13730 declaration, update them now. */
13733 complete_vars (tree type
)
13736 incomplete_var
*iv
;
13738 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
13740 if (same_type_p (type
, iv
->incomplete_type
))
13742 tree var
= iv
->decl
;
13743 tree type
= TREE_TYPE (var
);
13744 /* Complete the type of the variable. The VAR_DECL itself
13745 will be laid out in expand_expr. */
13746 complete_type (type
);
13747 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
13748 /* Remove this entry from the list. */
13749 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
13755 /* Check for pending declarations which may have abstract type. */
13756 complete_type_check_abstract (type
);
13759 /* If DECL is of a type which needs a cleanup, build and return an
13760 expression to perform that cleanup here. Return NULL_TREE if no
13761 cleanup need be done. */
13764 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
13770 /* Assume no cleanup is required. */
13771 cleanup
= NULL_TREE
;
13773 if (error_operand_p (decl
))
13776 /* Handle "__attribute__((cleanup))". We run the cleanup function
13777 before the destructor since the destructor is what actually
13778 terminates the lifetime of the object. */
13779 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
13786 /* Get the name specified by the user for the cleanup function. */
13787 id
= TREE_VALUE (TREE_VALUE (attr
));
13788 /* Look up the name to find the cleanup function to call. It is
13789 important to use lookup_name here because that is what is
13790 used in c-common.c:handle_cleanup_attribute when performing
13791 initial checks on the attribute. Note that those checks
13792 include ensuring that the function found is not an overloaded
13793 function, or an object with an overloaded call operator,
13794 etc.; we can rely on the fact that the function found is an
13795 ordinary FUNCTION_DECL. */
13796 fn
= lookup_name (id
);
13797 arg
= build_address (decl
);
13799 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
13800 if (cleanup
== error_mark_node
)
13801 return error_mark_node
;
13803 /* Handle ordinary C++ destructors. */
13804 type
= TREE_TYPE (decl
);
13805 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
13807 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
13808 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
13809 && CLASSTYPE_VBASECLASSES (type
));
13813 if (TREE_CODE (type
) == ARRAY_TYPE
)
13816 addr
= build_address (decl
);
13818 /* Optimize for space over speed here. */
13819 if (!has_vbases
|| flag_expensive_optimizations
)
13820 flags
|= LOOKUP_NONVIRTUAL
;
13822 call
= build_delete (TREE_TYPE (addr
), addr
,
13823 sfk_complete_destructor
, flags
, 0, complain
);
13824 if (call
== error_mark_node
)
13825 cleanup
= error_mark_node
;
13827 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
13832 /* build_delete sets the location of the destructor call to the
13833 current location, even though the destructor is going to be
13834 called later, at the end of the current scope. This can lead to
13835 a "jumpy" behaviour for users of debuggers when they step around
13836 the end of the block. So let's unset the location of the
13837 destructor call instead. */
13838 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
13839 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
13844 /* When a stmt has been parsed, this function is called. */
13851 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13852 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13853 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13856 static_fn_type (tree memfntype
)
13861 if (TYPE_PTRMEMFUNC_P (memfntype
))
13862 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13863 if (POINTER_TYPE_P (memfntype
)
13864 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13865 memfntype
= TREE_TYPE (memfntype
);
13866 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13868 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13869 args
= TYPE_ARG_TYPES (memfntype
);
13870 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13871 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13872 fntype
= (cp_build_type_attribute_variant
13873 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13874 fntype
= (build_exception_variant
13875 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13879 /* DECL was originally constructed as a non-static member function,
13880 but turned out to be static. Update it accordingly. */
13883 revert_static_member_fn (tree decl
)
13885 tree stype
= static_fn_type (decl
);
13886 cp_cv_quals quals
= type_memfn_quals (stype
);
13888 if (quals
!= TYPE_UNQUALIFIED
)
13889 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
13891 TREE_TYPE (decl
) = stype
;
13893 if (DECL_ARGUMENTS (decl
))
13894 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
13895 DECL_STATIC_FUNCTION_P (decl
) = 1;
13898 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13899 one of the language-independent trees. */
13901 enum cp_tree_node_structure_enum
13902 cp_tree_node_structure (union lang_tree_node
* t
)
13904 switch (TREE_CODE (&t
->generic
))
13906 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13907 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
13908 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13909 case OVERLOAD
: return TS_CP_OVERLOAD
;
13910 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13911 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13912 case BASELINK
: return TS_CP_BASELINK
;
13913 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13914 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13915 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13916 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13917 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13918 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
13919 default: return TS_CP_GENERIC
;
13923 /* Build the void_list_node (void_type_node having been created). */
13925 build_void_list_node (void)
13927 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13932 cp_missing_noreturn_ok_p (tree decl
)
13934 /* A missing noreturn is ok for the `main' function. */
13935 return DECL_MAIN_P (decl
);
13938 /* Return the COMDAT group into which DECL should be placed. */
13941 cxx_comdat_group (tree decl
)
13945 /* Virtual tables, construction virtual tables, and virtual table
13946 tables all go in a single COMDAT group, named after the primary
13948 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13949 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
13950 /* For all other DECLs, the COMDAT group is the mangled name of the
13951 declaration itself. */
13954 while (DECL_THUNK_P (decl
))
13956 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13957 into the same section as the target function. In that case
13958 we must return target's name. */
13959 tree target
= THUNK_TARGET (decl
);
13960 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
13961 && DECL_SECTION_NAME (target
) != NULL
13962 && DECL_ONE_ONLY (target
))
13967 name
= DECL_ASSEMBLER_NAME (decl
);
13973 #include "gt-cp-decl.h"