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
)
4221 location_t loc
= input_location
;
4222 if (!CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4223 /* For a non-template class, use the name location; for a template
4224 class (an explicit instantiation), use the current location. */
4225 input_location
= location_of (declared_type
);
4226 warning (0, "attribute ignored in declaration of %q#T", declared_type
);
4227 warning (0, "attribute for %q#T must follow the %qs keyword",
4228 declared_type
, class_key_or_enum_as_string (declared_type
));
4229 input_location
= loc
;
4232 return declared_type
;
4235 /* Called when a declaration is seen that contains no names to declare.
4236 If its type is a reference to a structure, union or enum inherited
4237 from a containing scope, shadow that tag name for the current scope
4238 with a forward reference.
4239 If its type defines a new named structure or union
4240 or defines an enum, it is valid but we need not do anything here.
4241 Otherwise, it is an error.
4243 C++: may have to grok the declspecs to learn about static,
4244 complain for anonymous unions.
4246 Returns the TYPE declared -- or NULL_TREE if none. */
4249 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4251 tree t
= check_tag_decl (declspecs
);
4256 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4259 /* This is where the variables in an anonymous union are
4260 declared. An anonymous union declaration looks like:
4262 because there is no declarator after the union, the parser
4263 sends that declaration here. */
4264 if (ANON_AGGR_TYPE_P (t
))
4266 fixup_anonymous_aggr (t
);
4268 if (TYPE_FIELDS (t
))
4270 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4271 declspecs
, NORMAL
, 0, NULL
);
4272 finish_anon_union (decl
);
4279 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4282 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4283 const cp_declarator
*declarator
,
4284 bool is_template_arg
)
4288 enum decl_context context
4289 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4290 attrs
= type_specifiers
->attributes
;
4291 type_specifiers
->attributes
= NULL_TREE
;
4292 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4293 if (attrs
&& type
!= error_mark_node
)
4295 if (CLASS_TYPE_P (type
))
4296 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4297 "outside of definition", type
);
4298 else if (MAYBE_CLASS_TYPE_P (type
))
4299 /* A template type parameter or other dependent type. */
4300 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4301 "type %qT without an associated declaration", type
);
4303 cplus_decl_attributes (&type
, attrs
, 0);
4308 /* Process a DECLARATOR for a function-scope variable declaration,
4309 namespace-scope variable declaration, or function declaration.
4310 (Function definitions go through start_function; class member
4311 declarations appearing in the body of the class go through
4312 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4313 If an error occurs, the error_mark_node is returned instead.
4315 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4316 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4317 for an explicitly defaulted function, or SD_DELETED for an explicitly
4318 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4319 implicitly initialized via a default constructor. ATTRIBUTES and
4320 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4322 The scope represented by the context of the returned DECL is pushed
4323 (if it is not the global namespace) and is assigned to
4324 *PUSHED_SCOPE_P. The caller is then responsible for calling
4325 pop_scope on *PUSHED_SCOPE_P if it is set. */
4328 start_decl (const cp_declarator
*declarator
,
4329 cp_decl_specifier_seq
*declspecs
,
4332 tree prefix_attributes
,
4333 tree
*pushed_scope_p
)
4341 *pushed_scope_p
= NULL_TREE
;
4343 /* An object declared as __attribute__((deprecated)) suppresses
4344 warnings of uses of other deprecated items. */
4345 if (lookup_attribute ("deprecated", attributes
))
4346 deprecated_state
= DEPRECATED_SUPPRESS
;
4348 attributes
= chainon (attributes
, prefix_attributes
);
4350 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4353 deprecated_state
= DEPRECATED_NORMAL
;
4355 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4356 || decl
== error_mark_node
)
4357 return error_mark_node
;
4359 context
= CP_DECL_CONTEXT (decl
);
4360 if (context
!= global_namespace
)
4361 *pushed_scope_p
= push_scope (context
);
4364 /* Is it valid for this decl to have an initializer at all?
4365 If not, set INITIALIZED to zero, which will indirectly
4366 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4367 switch (TREE_CODE (decl
))
4370 error ("typedef %qD is initialized (use decltype instead)", decl
);
4371 return error_mark_node
;
4374 if (initialized
== SD_DELETED
)
4375 /* We'll handle the rest of the semantics later, but we need to
4376 set this now so it's visible to duplicate_decls. */
4377 DECL_DELETED_FN (decl
) = 1;
4386 if (! toplevel_bindings_p ()
4387 && DECL_EXTERNAL (decl
))
4388 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4390 DECL_EXTERNAL (decl
) = 0;
4391 if (toplevel_bindings_p ())
4392 TREE_STATIC (decl
) = 1;
4394 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4396 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4397 record_key_method_defined (decl
);
4399 /* If this is a typedef that names the class for linkage purposes
4400 (7.1.3p8), apply any attributes directly to the type. */
4401 if (TREE_CODE (decl
) == TYPE_DECL
4402 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4403 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4404 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4408 /* Set attributes here so if duplicate decl, will have proper attributes. */
4409 cplus_decl_attributes (&decl
, attributes
, flags
);
4411 /* Dllimported symbols cannot be defined. Static data members (which
4412 can be initialized in-class and dllimported) go through grokfield,
4413 not here, so we don't need to exclude those decls when checking for
4415 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4417 error ("definition of %q#D is marked %<dllimport%>", decl
);
4418 DECL_DLLIMPORT_P (decl
) = 0;
4421 /* If #pragma weak was used, mark the decl weak now. */
4422 maybe_apply_pragma_weak (decl
);
4424 if (TREE_CODE (decl
) == FUNCTION_DECL
4425 && DECL_DECLARED_INLINE_P (decl
)
4426 && DECL_UNINLINABLE (decl
)
4427 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4428 warning (0, "inline function %q+D given attribute noinline", decl
);
4430 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4432 if (TREE_CODE (decl
) == VAR_DECL
)
4434 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4435 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4436 error ("%q#D is not a static member of %q#T", decl
, context
);
4439 if (DECL_CONTEXT (field
) != context
)
4441 if (!same_type_p (DECL_CONTEXT (field
), context
))
4442 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4443 "to be defined as %<%T::%D%>",
4444 DECL_CONTEXT (field
), DECL_NAME (decl
),
4445 context
, DECL_NAME (decl
));
4446 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4448 if (processing_specialization
4449 && template_class_depth (context
) == 0
4450 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4451 error ("template header not allowed in member definition "
4452 "of explicitly specialized class");
4453 /* Static data member are tricky; an in-class initialization
4454 still doesn't provide a definition, so the in-class
4455 declaration will have DECL_EXTERNAL set, but will have an
4456 initialization. Thus, duplicate_decls won't warn
4457 about this situation, and so we check here. */
4458 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4459 error ("duplicate initialization of %qD", decl
);
4460 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4462 if (declspecs
->specs
[(int) ds_constexpr
]
4463 && !DECL_DECLARED_CONSTEXPR_P (field
))
4464 error ("%qD declared %<constexpr%> outside its class", field
);
4469 tree field
= check_classfn (context
, decl
,
4470 (processing_template_decl
4471 > template_class_depth (context
))
4472 ? current_template_parms
4474 if (field
&& field
!= error_mark_node
4475 && duplicate_decls (decl
, field
,
4476 /*newdecl_is_friend=*/false))
4480 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4481 DECL_IN_AGGR_P (decl
) = 0;
4482 /* Do not mark DECL as an explicit specialization if it was not
4483 already marked as an instantiation; a declaration should
4484 never be marked as a specialization unless we know what
4485 template is being specialized. */
4486 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4488 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4490 /* [temp.expl.spec] An explicit specialization of a static data
4491 member of a template is a definition if the declaration
4492 includes an initializer; otherwise, it is a declaration.
4494 We check for processing_specialization so this only applies
4495 to the new specialization syntax. */
4496 if (!initialized
&& processing_specialization
)
4497 DECL_EXTERNAL (decl
) = 1;
4500 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4501 /* Aliases are definitions. */
4503 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4507 was_public
= TREE_PUBLIC (decl
);
4509 /* Enter this declaration into the symbol table. */
4510 decl
= maybe_push_decl (decl
);
4512 if (processing_template_decl
)
4513 decl
= push_template_decl (decl
);
4514 if (decl
== error_mark_node
)
4515 return error_mark_node
;
4517 /* Tell the back end to use or not use .common as appropriate. If we say
4518 -fconserve-space, we want this to save .data space, at the expense of
4519 wrong semantics. If we say -fno-conserve-space, we want this to
4520 produce errors about redefs; to do this we force variables into the
4522 if (flag_conserve_space
4523 && TREE_CODE (decl
) == VAR_DECL
4524 && TREE_PUBLIC (decl
)
4525 && !DECL_THREAD_LOCAL_P (decl
)
4526 && !have_global_bss_p ())
4527 DECL_COMMON (decl
) = 1;
4529 if (TREE_CODE (decl
) == VAR_DECL
4530 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4531 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4533 /* This is a const variable with implicit 'static'. Set
4534 DECL_THIS_STATIC so we can tell it from variables that are
4535 !TREE_PUBLIC because of the anonymous namespace. */
4536 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4537 DECL_THIS_STATIC (decl
) = 1;
4540 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4541 start_decl_1 (decl
, initialized
);
4546 /* Process the declaration of a variable DECL. INITIALIZED is true
4547 iff DECL is explicitly initialized. (INITIALIZED is false if the
4548 variable is initialized via an implicitly-called constructor.)
4549 This function must be called for ordinary variables (including, for
4550 example, implicit instantiations of templates), but must not be
4551 called for template declarations. */
4554 start_decl_1 (tree decl
, bool initialized
)
4558 bool aggregate_definition_p
;
4560 gcc_assert (!processing_template_decl
);
4562 if (error_operand_p (decl
))
4565 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4567 type
= TREE_TYPE (decl
);
4568 complete_p
= COMPLETE_TYPE_P (type
);
4569 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4571 /* If an explicit initializer is present, or if this is a definition
4572 of an aggregate, then we need a complete type at this point.
4573 (Scalars are always complete types, so there is nothing to
4574 check.) This code just sets COMPLETE_P; errors (if necessary)
4575 are issued below. */
4576 if ((initialized
|| aggregate_definition_p
)
4578 && COMPLETE_TYPE_P (complete_type (type
)))
4581 /* We will not yet have set TREE_READONLY on DECL if the type
4582 was "const", but incomplete, before this point. But, now, we
4583 have a complete type, so we can try again. */
4584 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4588 /* Is it valid for this decl to have an initializer at all? */
4590 /* Don't allow initializations for incomplete types except for
4591 arrays which might be completed by the initialization. */
4593 ; /* A complete type is ok. */
4594 else if (type_uses_auto (type
))
4595 ; /* An auto type is ok. */
4596 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4598 error ("variable %q#D has initializer but incomplete type", decl
);
4599 type
= TREE_TYPE (decl
) = error_mark_node
;
4601 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4603 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4604 error ("elements of array %q#D have incomplete type", decl
);
4605 /* else we already gave an error in start_decl. */
4608 else if (aggregate_definition_p
&& !complete_p
)
4610 if (type_uses_auto (type
))
4611 error ("declaration of %q#D has no initializer", decl
);
4613 error ("aggregate %q#D has incomplete type and cannot be defined",
4615 /* Change the type so that assemble_variable will give
4616 DECL an rtl we can live with: (mem (const_int 0)). */
4617 type
= TREE_TYPE (decl
) = error_mark_node
;
4620 /* Create a new scope to hold this declaration if necessary.
4621 Whether or not a new scope is necessary cannot be determined
4622 until after the type has been completed; if the type is a
4623 specialization of a class template it is not until after
4624 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4625 will be set correctly. */
4626 maybe_push_cleanup_level (type
);
4629 /* Handle initialization of references. DECL, TYPE, and INIT have the
4630 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4631 but will be set to a new CLEANUP_STMT if a temporary is created
4632 that must be destroyed subsequently.
4634 Returns an initializer expression to use to initialize DECL, or
4635 NULL if the initialization can be performed statically.
4637 Quotes on semantics can be found in ARM 8.4.3. */
4640 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4642 if (init
== NULL_TREE
)
4644 if ((DECL_LANG_SPECIFIC (decl
) == 0
4645 || DECL_IN_AGGR_P (decl
) == 0)
4646 && ! DECL_THIS_EXTERN (decl
))
4647 error ("%qD declared as reference but not initialized", decl
);
4651 if (TREE_CODE (init
) == TREE_LIST
)
4652 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4653 tf_warning_or_error
);
4655 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4656 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4657 /* Note: default conversion is only called in very special cases. */
4658 init
= decay_conversion (init
);
4660 /* Convert INIT to the reference type TYPE. This may involve the
4661 creation of a temporary, whose lifetime must be the same as that
4662 of the reference. If so, a DECL_EXPR for the temporary will be
4663 added just after the DECL_EXPR for DECL. That's why we don't set
4664 DECL_INITIAL for local references (instead assigning to them
4665 explicitly); we need to allow the temporary to be initialized
4667 return initialize_reference (type
, init
, flags
,
4668 tf_warning_or_error
);
4671 /* Designated initializers in arrays are not supported in GNU C++.
4672 The parser cannot detect this error since it does not know whether
4673 a given brace-enclosed initializer is for a class type or for an
4674 array. This function checks that CE does not use a designated
4675 initializer. If it does, an error is issued. Returns true if CE
4676 is valid, i.e., does not have a designated initializer. */
4679 check_array_designated_initializer (const constructor_elt
*ce
,
4680 unsigned HOST_WIDE_INT index
)
4682 /* Designated initializers for array elements are not supported. */
4685 /* The parser only allows identifiers as designated
4687 if (ce
->index
== error_mark_node
)
4688 error ("name used in a GNU-style designated "
4689 "initializer for an array");
4690 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4692 /* A C99 designator is OK if it matches the current index. */
4693 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4696 sorry ("non-trivial designated initializers not supported");
4700 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4701 error ("name %qD used in a GNU-style designated "
4702 "initializer for an array", ce
->index
);
4710 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4711 array until we finish parsing the initializer. If that's the
4712 situation we're in, update DECL accordingly. */
4715 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4717 tree type
= TREE_TYPE (decl
);
4719 if (TREE_CODE (type
) == ARRAY_TYPE
4720 && TYPE_DOMAIN (type
) == NULL_TREE
4721 && TREE_CODE (decl
) != TYPE_DECL
)
4723 /* do_default is really a C-ism to deal with tentative definitions.
4724 But let's leave it here to ease the eventual merge. */
4725 int do_default
= !DECL_EXTERNAL (decl
);
4726 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4729 /* Check that there are no designated initializers in INIT, as
4730 those are not supported in GNU C++, and as the middle-end
4731 will crash if presented with a non-numeric designated
4733 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4735 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4736 constructor_elt
*ce
;
4738 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4739 if (!check_array_designated_initializer (ce
, i
))
4745 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4749 error ("initializer fails to determine size of %qD", decl
);
4750 TREE_TYPE (decl
) = error_mark_node
;
4752 else if (failure
== 2)
4756 error ("array size missing in %qD", decl
);
4757 TREE_TYPE (decl
) = error_mark_node
;
4759 /* If a `static' var's size isn't known, make it extern as
4760 well as static, so it does not get allocated. If it's not
4761 `static', then don't mark it extern; finish_incomplete_decl
4762 will give it a default size and it will get allocated. */
4763 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4764 DECL_EXTERNAL (decl
) = 1;
4766 else if (failure
== 3)
4768 error ("zero-size array %qD", decl
);
4769 TREE_TYPE (decl
) = error_mark_node
;
4773 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4775 relayout_decl (decl
);
4779 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4780 any appropriate error messages regarding the layout. */
4783 layout_var_decl (tree decl
)
4787 type
= TREE_TYPE (decl
);
4788 if (type
== error_mark_node
)
4791 /* If we haven't already layed out this declaration, do so now.
4792 Note that we must not call complete type for an external object
4793 because it's type might involve templates that we are not
4794 supposed to instantiate yet. (And it's perfectly valid to say
4795 `extern X x' for some incomplete type `X'.) */
4796 if (!DECL_EXTERNAL (decl
))
4797 complete_type (type
);
4798 if (!DECL_SIZE (decl
)
4799 && TREE_TYPE (decl
) != error_mark_node
4800 && (COMPLETE_TYPE_P (type
)
4801 || (TREE_CODE (type
) == ARRAY_TYPE
4802 && !TYPE_DOMAIN (type
)
4803 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4804 layout_decl (decl
, 0);
4806 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4808 /* An automatic variable with an incomplete type: that is an error.
4809 Don't talk about array types here, since we took care of that
4810 message in grokdeclarator. */
4811 error ("storage size of %qD isn%'t known", decl
);
4812 TREE_TYPE (decl
) = error_mark_node
;
4815 /* Keep this code around in case we later want to control debug info
4816 based on whether a type is "used". (jason 1999-11-11) */
4818 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4819 /* Let debugger know it should output info for this type. */
4820 note_debug_info_needed (ttype
);
4822 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4823 note_debug_info_needed (DECL_CONTEXT (decl
));
4826 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4827 && DECL_SIZE (decl
) != NULL_TREE
4828 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4830 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4831 constant_expression_warning (DECL_SIZE (decl
));
4834 error ("storage size of %qD isn%'t constant", decl
);
4835 TREE_TYPE (decl
) = error_mark_node
;
4840 /* If a local static variable is declared in an inline function, or if
4841 we have a weak definition, we must endeavor to create only one
4842 instance of the variable at link-time. */
4845 maybe_commonize_var (tree decl
)
4847 /* Static data in a function with comdat linkage also has comdat
4849 if (TREE_STATIC (decl
)
4850 /* Don't mess with __FUNCTION__. */
4851 && ! DECL_ARTIFICIAL (decl
)
4852 && DECL_FUNCTION_SCOPE_P (decl
)
4853 && vague_linkage_p (DECL_CONTEXT (decl
)))
4857 /* With weak symbols, we simply make the variable COMDAT;
4858 that will cause copies in multiple translations units to
4860 comdat_linkage (decl
);
4864 if (DECL_INITIAL (decl
) == NULL_TREE
4865 || DECL_INITIAL (decl
) == error_mark_node
)
4867 /* Without weak symbols, we can use COMMON to merge
4868 uninitialized variables. */
4869 TREE_PUBLIC (decl
) = 1;
4870 DECL_COMMON (decl
) = 1;
4874 /* While for initialized variables, we must use internal
4875 linkage -- which means that multiple copies will not
4877 TREE_PUBLIC (decl
) = 0;
4878 DECL_COMMON (decl
) = 0;
4879 warning_at (input_location
, 0,
4880 "sorry: semantics of inline function static "
4881 "data %q+#D are wrong (you%'ll wind up "
4882 "with multiple copies)", decl
);
4883 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4884 " you can work around this by removing "
4889 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4890 /* Set it up again; we might have set DECL_INITIAL since the last
4892 comdat_linkage (decl
);
4895 /* Issue an error message if DECL is an uninitialized const variable. */
4898 check_for_uninitialized_const_var (tree decl
)
4900 tree type
= strip_array_types (TREE_TYPE (decl
));
4902 /* ``Unless explicitly declared extern, a const object does not have
4903 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4905 if (TREE_CODE (decl
) == VAR_DECL
4906 && TREE_CODE (type
) != REFERENCE_TYPE
4907 && CP_TYPE_CONST_P (type
)
4908 && !DECL_INITIAL (decl
))
4910 tree field
= default_init_uninitialized_part (type
);
4914 permerror (DECL_SOURCE_LOCATION (decl
),
4915 "uninitialized const %qD", decl
);
4917 if (CLASS_TYPE_P (type
))
4919 tree defaulted_ctor
;
4921 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4922 "%q#T has no user-provided default constructor", type
);
4923 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4925 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4926 "constructor is not user-provided because it is "
4927 "explicitly defaulted in the class body");
4928 inform (0, "and the implicitly-defined constructor does not "
4929 "initialize %q+#D", field
);
4934 /* Structure holding the current initializer being processed by reshape_init.
4935 CUR is a pointer to the current element being processed, END is a pointer
4936 after the last element present in the initializer. */
4937 typedef struct reshape_iterator_t
4939 constructor_elt
*cur
;
4940 constructor_elt
*end
;
4943 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
4945 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4946 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4947 initialized. If there are no more such fields, the return value
4951 next_initializable_field (tree field
)
4954 && (TREE_CODE (field
) != FIELD_DECL
4955 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4956 || DECL_ARTIFICIAL (field
)))
4957 field
= DECL_CHAIN (field
);
4962 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4963 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4964 INTEGER_CST representing the size of the array minus one (the maximum index),
4965 or NULL_TREE if the array was declared without specifying the size. D is
4966 the iterator within the constructor. */
4969 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
4970 tsubst_flags_t complain
)
4973 bool sized_array_p
= (max_index
!= NULL_TREE
);
4974 unsigned HOST_WIDE_INT max_index_cst
= 0;
4975 unsigned HOST_WIDE_INT index
;
4977 /* The initializer for an array is always a CONSTRUCTOR. */
4978 new_init
= build_constructor (init_list_type_node
, NULL
);
4982 /* Minus 1 is used for zero sized arrays. */
4983 if (integer_all_onesp (max_index
))
4986 if (host_integerp (max_index
, 1))
4987 max_index_cst
= tree_low_cst (max_index
, 1);
4988 /* sizetype is sign extended, not zero extended. */
4990 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4994 /* Loop until there are no more initializers. */
4996 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5001 check_array_designated_initializer (d
->cur
, index
);
5002 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5004 if (elt_init
== error_mark_node
)
5005 return error_mark_node
;
5006 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5007 size_int (index
), elt_init
);
5008 if (!TREE_CONSTANT (elt_init
))
5009 TREE_CONSTANT (new_init
) = false;
5015 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5016 Parameters are the same of reshape_init_r. */
5019 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5021 tree max_index
= NULL_TREE
;
5023 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5025 if (TYPE_DOMAIN (type
))
5026 max_index
= array_type_nelts (type
);
5028 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5031 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5032 Parameters are the same of reshape_init_r. */
5035 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5037 tree max_index
= NULL_TREE
;
5039 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5041 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5043 tree value
= d
->cur
->value
;
5044 if (!same_type_p (TREE_TYPE (value
), type
))
5046 if (complain
& tf_error
)
5047 error ("invalid type %qT as initializer for a vector of type %qT",
5048 TREE_TYPE (d
->cur
->value
), type
);
5049 value
= error_mark_node
;
5055 /* For a vector, we initialize it as an array of the appropriate size. */
5056 if (TREE_CODE (type
) == VECTOR_TYPE
)
5057 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5059 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5062 /* Subroutine of reshape_init_r, processes the initializers for classes
5063 or union. Parameters are the same of reshape_init_r. */
5066 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5067 tsubst_flags_t complain
)
5072 gcc_assert (CLASS_TYPE_P (type
));
5074 /* The initializer for a class is always a CONSTRUCTOR. */
5075 new_init
= build_constructor (init_list_type_node
, NULL
);
5076 field
= next_initializable_field (TYPE_FIELDS (type
));
5082 An initializer for an aggregate member that is an
5083 empty class shall have the form of an empty
5084 initializer-list {}. */
5085 if (!first_initializer_p
)
5087 if (complain
& tf_error
)
5088 error ("initializer for %qT must be brace-enclosed", type
);
5089 return error_mark_node
;
5094 /* Loop through the initializable fields, gathering initializers. */
5095 while (d
->cur
!= d
->end
)
5099 /* Handle designated initializers, as an extension. */
5102 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5104 if (complain
& tf_error
)
5105 error ("%<[%E] =%> used in a GNU-style designated initializer"
5106 " for class %qT", d
->cur
->index
, type
);
5107 return error_mark_node
;
5110 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5112 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5114 if (complain
& tf_error
)
5115 error ("%qT has no non-static data member named %qD", type
,
5117 return error_mark_node
;
5121 /* If we processed all the member of the class, we are done. */
5125 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5126 /*first_initializer_p=*/false, complain
);
5127 if (field_init
== error_mark_node
)
5128 return error_mark_node
;
5130 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5134 When a union is initialized with a brace-enclosed
5135 initializer, the braces shall only contain an
5136 initializer for the first member of the union. */
5137 if (TREE_CODE (type
) == UNION_TYPE
)
5140 field
= next_initializable_field (DECL_CHAIN (field
));
5146 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5147 designators are not valid; either complain or return true to indicate
5148 that reshape_init_r should return error_mark_node. */
5151 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5155 if (complain
& tf_error
)
5156 error ("C99 designator %qE outside aggregate initializer",
5164 /* Subroutine of reshape_init, which processes a single initializer (part of
5165 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5166 iterator within the CONSTRUCTOR which points to the initializer to process.
5167 FIRST_INITIALIZER_P is true if this is the first initializer of the
5168 outermost CONSTRUCTOR node. */
5171 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5172 tsubst_flags_t complain
)
5174 tree init
= d
->cur
->value
;
5176 if (error_operand_p (init
))
5177 return error_mark_node
;
5179 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5180 && has_designator_problem (d
, complain
))
5181 return error_mark_node
;
5183 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5185 /* A complex type can be initialized from one or two initializers,
5186 but braces are not elided. */
5188 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5190 if (CONSTRUCTOR_NELTS (init
) > 2)
5192 if (complain
& tf_error
)
5193 error ("too many initializers for %qT", type
);
5195 return error_mark_node
;
5198 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5200 VEC(constructor_elt
, gc
) *v
= 0;
5201 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5202 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5203 if (has_designator_problem (d
, complain
))
5204 return error_mark_node
;
5206 init
= build_constructor (init_list_type_node
, v
);
5211 /* A non-aggregate type is always initialized with a single
5213 if (!CP_AGGREGATE_TYPE_P (type
))
5215 /* It is invalid to initialize a non-aggregate type with a
5216 brace-enclosed initializer before C++0x.
5217 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5218 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5219 a CONSTRUCTOR (with a record type). */
5220 if (TREE_CODE (init
) == CONSTRUCTOR
5221 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5223 if (SCALAR_TYPE_P (type
))
5225 if (complain
& tf_error
)
5226 error ("braces around scalar initializer for type %qT", type
);
5227 init
= error_mark_node
;
5230 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5239 All implicit type conversions (clause _conv_) are considered when
5240 initializing the aggregate member with an initializer from an
5241 initializer-list. If the initializer can initialize a member,
5242 the member is initialized. Otherwise, if the member is itself a
5243 non-empty subaggregate, brace elision is assumed and the
5244 initializer is considered for the initialization of the first
5245 member of the subaggregate. */
5246 if (TREE_CODE (init
) != CONSTRUCTOR
5247 /* But don't try this for the first initializer, since that would be
5248 looking through the outermost braces; A a2 = { a1 }; is not a
5249 valid aggregate initialization. */
5250 && !first_initializer_p
5251 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5252 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5258 /* [dcl.init.string]
5260 A char array (whether plain char, signed char, or unsigned char)
5261 can be initialized by a string-literal (optionally enclosed in
5262 braces); a wchar_t array can be initialized by a wide
5263 string-literal (optionally enclosed in braces). */
5264 if (TREE_CODE (type
) == ARRAY_TYPE
5265 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5267 tree str_init
= init
;
5269 /* Strip one level of braces if and only if they enclose a single
5270 element (as allowed by [dcl.init.string]). */
5271 if (!first_initializer_p
5272 && TREE_CODE (str_init
) == CONSTRUCTOR
5273 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5275 str_init
= VEC_index (constructor_elt
,
5276 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5279 /* If it's a string literal, then it's the initializer for the array
5280 as a whole. Otherwise, continue with normal initialization for
5281 array types (one value per array element). */
5282 if (TREE_CODE (str_init
) == STRING_CST
)
5284 if (has_designator_problem (d
, complain
))
5285 return error_mark_node
;
5291 /* The following cases are about aggregates. If we are not within a full
5292 initializer already, and there is not a CONSTRUCTOR, it means that there
5293 is a missing set of braces (that is, we are processing the case for
5294 which reshape_init exists). */
5295 if (!first_initializer_p
)
5297 if (TREE_CODE (init
) == CONSTRUCTOR
)
5299 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5300 /* There is no need to reshape pointer-to-member function
5301 initializers, as they are always constructed correctly
5302 by the front end. */
5304 else if (COMPOUND_LITERAL_P (init
))
5305 /* For a nested compound literal, there is no need to reshape since
5306 brace elision is not allowed. Even if we decided to allow it,
5307 we should add a call to reshape_init in finish_compound_literal,
5308 before calling digest_init, so changing this code would still
5309 not be necessary. */
5310 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5314 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5315 return reshape_init (type
, init
, complain
);
5319 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5323 /* Dispatch to specialized routines. */
5324 if (CLASS_TYPE_P (type
))
5325 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5326 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5327 return reshape_init_array (type
, d
, complain
);
5328 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5329 return reshape_init_vector (type
, d
, complain
);
5334 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5335 brace-enclosed aggregate initializer.
5337 INIT is the CONSTRUCTOR containing the list of initializers describing
5338 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5339 It may not presently match the shape of the TYPE; for example:
5341 struct S { int a; int b; };
5342 struct S a[] = { 1, 2, 3, 4 };
5344 Here INIT will hold a VEC of four elements, rather than a
5345 VEC of two elements, each itself a VEC of two elements. This
5346 routine transforms INIT from the former form into the latter. The
5347 revised CONSTRUCTOR node is returned. */
5350 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5352 VEC(constructor_elt
, gc
) *v
;
5356 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5358 v
= CONSTRUCTOR_ELTS (init
);
5360 /* An empty constructor does not need reshaping, and it is always a valid
5362 if (VEC_empty (constructor_elt
, v
))
5365 /* Recurse on this CONSTRUCTOR. */
5366 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5367 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5369 new_init
= reshape_init_r (type
, &d
, true, complain
);
5370 if (new_init
== error_mark_node
)
5371 return error_mark_node
;
5373 /* Make sure all the element of the constructor were used. Otherwise,
5374 issue an error about exceeding initializers. */
5377 if (complain
& tf_error
)
5378 error ("too many initializers for %qT", type
);
5380 return error_mark_node
;
5386 /* Verify array initializer. Returns true if errors have been reported. */
5389 check_array_initializer (tree decl
, tree type
, tree init
)
5391 tree element_type
= TREE_TYPE (type
);
5393 /* The array type itself need not be complete, because the
5394 initializer may tell us how many elements are in the array.
5395 But, the elements of the array must be complete. */
5396 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5399 error ("elements of array %q#D have incomplete type", decl
);
5401 error ("elements of array %q#T have incomplete type", type
);
5404 /* It is not valid to initialize a VLA. */
5406 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5407 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5410 error ("variable-sized object %qD may not be initialized", decl
);
5412 error ("variable-sized compound literal");
5418 /* Subroutine of check_initializer; args are passed down from that function.
5419 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5422 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5425 gcc_assert (stmts_are_full_exprs_p ());
5426 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5429 /* Verify INIT (the initializer for DECL), and record the
5430 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5431 grok_reference_init.
5433 If the return value is non-NULL, it is an expression that must be
5434 evaluated dynamically to initialize DECL. */
5437 check_initializer (tree decl
, tree init
, int flags
, VEC(tree
,gc
) **cleanups
)
5439 tree type
= TREE_TYPE (decl
);
5440 tree init_code
= NULL
;
5441 tree extra_init
= NULL_TREE
;
5444 /* Things that are going to be initialized need to have complete
5446 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5448 if (DECL_HAS_VALUE_EXPR_P (decl
))
5450 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5451 it doesn't have storage to be initialized. */
5452 gcc_assert (init
== NULL_TREE
);
5456 if (type
== error_mark_node
)
5457 /* We will have already complained. */
5460 if (TREE_CODE (type
) == ARRAY_TYPE
)
5462 if (check_array_initializer (decl
, type
, init
))
5465 else if (!COMPLETE_TYPE_P (type
))
5467 error ("%q#D has incomplete type", decl
);
5468 TREE_TYPE (decl
) = error_mark_node
;
5472 /* There is no way to make a variable-sized class type in GNU C++. */
5473 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5475 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5477 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5478 if (SCALAR_TYPE_P (type
))
5482 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5483 init
= build_zero_init (type
, NULL_TREE
, false);
5485 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5487 error ("scalar object %qD requires one element in initializer",
5489 TREE_TYPE (decl
) = error_mark_node
;
5495 if (TREE_CODE (decl
) == CONST_DECL
)
5497 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5499 DECL_INITIAL (decl
) = init
;
5501 gcc_assert (init
!= NULL_TREE
);
5504 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5506 else if (init
|| type_build_ctor_call (type
)
5507 || TREE_CODE (type
) == REFERENCE_TYPE
)
5509 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5511 init
= grok_reference_init (decl
, type
, init
, flags
);
5512 flags
|= LOOKUP_ALREADY_DIGESTED
;
5515 check_for_uninitialized_const_var (decl
);
5516 /* Do not reshape constructors of vectors (they don't need to be
5518 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5520 if (is_std_init_list (type
))
5522 init
= perform_implicit_conversion (type
, init
,
5523 tf_warning_or_error
);
5524 flags
|= LOOKUP_ALREADY_DIGESTED
;
5526 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5528 /* Don't reshape if the class has constructors. */
5529 if (cxx_dialect
== cxx98
)
5530 error ("in C++98 %qD must be initialized by constructor, "
5534 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5536 error ("opaque vector types cannot be initialized");
5537 init
= error_mark_node
;
5541 init
= reshape_init (type
, init
, tf_warning_or_error
);
5542 if (SCALAR_TYPE_P (type
))
5543 check_narrowing (type
, init
);
5547 /* If DECL has an array type without a specific bound, deduce the
5548 array size from the initializer. */
5549 maybe_deduce_size_from_array_init (decl
, init
);
5550 type
= TREE_TYPE (decl
);
5551 if (type
== error_mark_node
)
5554 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5555 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5556 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5557 && CP_AGGREGATE_TYPE_P (type
)))
5559 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5561 /* If this is a constexpr initializer, expand_default_init will
5562 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5563 case, pull the initializer back out and pass it down into
5564 store_init_value. */
5565 while (TREE_CODE (init_code
) == EXPR_STMT
5566 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5567 init_code
= TREE_OPERAND (init_code
, 0);
5568 if (TREE_CODE (init_code
) == INIT_EXPR
)
5570 init
= TREE_OPERAND (init_code
, 1);
5571 init_code
= NULL_TREE
;
5572 /* Don't call digest_init; it's unnecessary and will complain
5573 about aggregate initialization of non-aggregate classes. */
5574 flags
|= LOOKUP_ALREADY_DIGESTED
;
5576 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5578 /* Declared constexpr, but no suitable initializer; massage
5579 init appropriately so we can pass it into store_init_value
5581 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5582 init
= finish_compound_literal (type
, init
,
5583 tf_warning_or_error
);
5584 else if (CLASS_TYPE_P (type
)
5585 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5587 init
= build_functional_cast (type
, init
, tf_none
);
5588 if (init
!= error_mark_node
)
5589 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5591 init_code
= NULL_TREE
;
5597 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5599 /* In aggregate initialization of a variable, each element
5600 initialization is a full-expression because there is no
5601 enclosing expression. */
5602 gcc_assert (stmts_are_full_exprs_p ());
5604 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5606 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5607 && DECL_INITIAL (decl
)
5608 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5609 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5610 warning (0, "array %qD initialized by parenthesized string literal %qE",
5611 decl
, DECL_INITIAL (decl
));
5617 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5618 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5619 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5620 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5623 check_for_uninitialized_const_var (decl
);
5626 if (init
&& init
!= error_mark_node
)
5627 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5630 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5632 if (init_code
&& DECL_IN_AGGR_P (decl
))
5634 static int explained
= 0;
5636 if (cxx_dialect
< cxx0x
)
5637 error ("initializer invalid for static member with constructor");
5639 error ("non-constant in-class initialization invalid for static "
5640 "member %qD", decl
);
5643 error ("(an out of class initialization is required)");
5651 /* If DECL is not a local variable, give it RTL. */
5654 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5656 int toplev
= toplevel_bindings_p ();
5658 const char *filename
;
5660 /* Set the DECL_ASSEMBLER_NAME for the object. */
5663 /* The `register' keyword, when used together with an
5664 asm-specification, indicates that the variable should be
5665 placed in a particular register. */
5666 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5668 set_user_assembler_name (decl
, asmspec
);
5669 DECL_HARD_REGISTER (decl
) = 1;
5673 if (TREE_CODE (decl
) == FUNCTION_DECL
5674 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5675 set_builtin_user_assembler_name (decl
, asmspec
);
5676 set_user_assembler_name (decl
, asmspec
);
5680 /* Handle non-variables up front. */
5681 if (TREE_CODE (decl
) != VAR_DECL
)
5683 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5687 /* If we see a class member here, it should be a static data
5689 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5691 gcc_assert (TREE_STATIC (decl
));
5692 /* An in-class declaration of a static data member should be
5693 external; it is only a declaration, and not a definition. */
5694 if (init
== NULL_TREE
)
5695 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5698 /* We don't create any RTL for local variables. */
5699 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5702 /* We defer emission of local statics until the corresponding
5703 DECL_EXPR is expanded. */
5704 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5706 /* We try to defer namespace-scope static constants so that they are
5707 not emitted into the object file unnecessarily. */
5708 filename
= input_filename
;
5709 if (!DECL_VIRTUAL_P (decl
)
5710 && TREE_READONLY (decl
)
5711 && DECL_INITIAL (decl
) != NULL_TREE
5712 && DECL_INITIAL (decl
) != error_mark_node
5714 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5716 && !TREE_PUBLIC (decl
))
5718 /* Fool with the linkage of static consts according to #pragma
5720 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5721 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5723 TREE_PUBLIC (decl
) = 1;
5724 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5729 /* Likewise for template instantiations. */
5730 else if (DECL_LANG_SPECIFIC (decl
)
5731 && DECL_IMPLICIT_INSTANTIATION (decl
))
5734 /* If we're not deferring, go ahead and assemble the variable. */
5736 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5739 /* walk_tree helper for wrap_temporary_cleanups, below. */
5742 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5744 /* Stop at types or full-expression boundaries. */
5745 if (TYPE_P (*stmt_p
)
5746 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5752 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5754 tree guard
= (tree
)data
;
5755 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5757 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5758 /* Tell honor_protect_cleanup_actions to handle this as a separate
5760 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5762 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5768 /* We're initializing a local variable which has a cleanup GUARD. If there
5769 are any temporaries used in the initializer INIT of this variable, we
5770 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5771 variable will be cleaned up properly if one of them throws.
5773 Unfortunately, there's no way to express this properly in terms of
5774 nesting, as the regions for the temporaries overlap the region for the
5775 variable itself; if there are two temporaries, the variable needs to be
5776 the first thing destroyed if either of them throws. However, we only
5777 want to run the variable's cleanup if it actually got constructed. So
5778 we need to guard the temporary cleanups with the variable's cleanup if
5779 they are run on the normal path, but not if they are run on the
5780 exceptional path. We implement this by telling
5781 honor_protect_cleanup_actions to strip the variable cleanup from the
5782 exceptional path. */
5785 wrap_temporary_cleanups (tree init
, tree guard
)
5787 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5790 /* Generate code to initialize DECL (a local variable). */
5793 initialize_local_var (tree decl
, tree init
)
5795 tree type
= TREE_TYPE (decl
);
5799 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5800 || TREE_CODE (decl
) == RESULT_DECL
);
5801 gcc_assert (!TREE_STATIC (decl
));
5803 if (DECL_SIZE (decl
) == NULL_TREE
)
5805 /* If we used it already as memory, it must stay in memory. */
5806 DECL_INITIAL (decl
) = NULL_TREE
;
5807 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5811 if (type
== error_mark_node
)
5814 /* Compute and store the initial value. */
5815 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5816 if (TREE_USED (type
))
5817 DECL_READ_P (decl
) = 1;
5819 /* Generate a cleanup, if necessary. */
5820 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5822 /* Perform the initialization. */
5825 if (TREE_CODE (init
) == INIT_EXPR
5826 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5828 /* Stick simple initializers in DECL_INITIAL so that
5829 -Wno-init-self works (c++/34772). */
5830 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5831 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5835 int saved_stmts_are_full_exprs_p
;
5837 /* If we're only initializing a single object, guard the
5838 destructors of any temporaries used in its initializer with
5839 its destructor. This isn't right for arrays because each
5840 element initialization is a full-expression. */
5841 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5842 wrap_temporary_cleanups (init
, cleanup
);
5844 gcc_assert (building_stmt_list_p ());
5845 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5846 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5847 finish_expr_stmt (init
);
5848 current_stmt_tree ()->stmts_are_full_exprs_p
=
5849 saved_stmts_are_full_exprs_p
;
5853 /* Set this to 0 so we can tell whether an aggregate which was
5854 initialized was ever used. Don't do this if it has a
5855 destructor, so we don't complain about the 'resource
5856 allocation is initialization' idiom. Now set
5857 attribute((unused)) on types so decls of that type will be
5858 marked used. (see TREE_USED, above.) */
5859 if (TYPE_NEEDS_CONSTRUCTING (type
)
5861 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5862 && DECL_NAME (decl
))
5863 TREE_USED (decl
) = 0;
5864 else if (already_used
)
5865 TREE_USED (decl
) = 1;
5868 finish_decl_cleanup (decl
, cleanup
);
5871 /* DECL is a VAR_DECL for a compiler-generated variable with static
5872 storage duration (like a virtual table) whose initializer is a
5873 compile-time constant. Initialize the variable and provide it to the
5877 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5880 gcc_assert (DECL_ARTIFICIAL (decl
));
5881 init
= build_constructor (TREE_TYPE (decl
), v
);
5882 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5883 DECL_INITIAL (decl
) = init
;
5884 DECL_INITIALIZED_P (decl
) = 1;
5885 determine_visibility (decl
);
5886 layout_var_decl (decl
);
5887 maybe_commonize_var (decl
);
5888 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5891 /* INIT is the initializer for a variable, as represented by the
5892 parser. Returns true iff INIT is type-dependent. */
5895 type_dependent_init_p (tree init
)
5897 if (TREE_CODE (init
) == TREE_LIST
)
5898 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5899 return any_type_dependent_elements_p (init
);
5900 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5901 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5903 VEC(constructor_elt
, gc
) *elts
;
5907 elts
= CONSTRUCTOR_ELTS (init
);
5908 nelts
= VEC_length (constructor_elt
, elts
);
5909 for (i
= 0; i
< nelts
; ++i
)
5910 if (type_dependent_init_p (VEC_index (constructor_elt
,
5915 /* It must be a simple expression, e.g., int i = 3; */
5916 return type_dependent_expression_p (init
);
5921 /* INIT is the initializer for a variable, as represented by the
5922 parser. Returns true iff INIT is value-dependent. */
5925 value_dependent_init_p (tree init
)
5927 if (TREE_CODE (init
) == TREE_LIST
)
5928 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5929 return any_value_dependent_elements_p (init
);
5930 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5931 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5933 VEC(constructor_elt
, gc
) *elts
;
5937 elts
= CONSTRUCTOR_ELTS (init
);
5938 nelts
= VEC_length (constructor_elt
, elts
);
5939 for (i
= 0; i
< nelts
; ++i
)
5940 if (value_dependent_init_p (VEC_index (constructor_elt
,
5945 /* It must be a simple expression, e.g., int i = 3; */
5946 return value_dependent_expression_p (init
);
5951 /* Finish processing of a declaration;
5952 install its line number and initial value.
5953 If the length of an array type is not known before,
5954 it must be determined now, from the initial value, or it is an error.
5956 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5957 true, then INIT is an integral constant expression.
5959 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5960 if the (init) syntax was used. */
5963 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5964 tree asmspec_tree
, int flags
)
5967 VEC(tree
,gc
) *cleanups
= NULL
;
5968 const char *asmspec
= NULL
;
5969 int was_readonly
= 0;
5970 bool var_definition_p
= false;
5973 if (decl
== error_mark_node
)
5978 error ("assignment (not initialization) in declaration");
5982 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5983 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5984 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5986 type
= TREE_TYPE (decl
);
5987 if (type
== error_mark_node
)
5990 /* If a name was specified, get the string. */
5991 if (at_namespace_scope_p ())
5992 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5993 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5994 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5996 if (current_class_type
5997 && CP_DECL_CONTEXT (decl
) == current_class_type
5998 && TYPE_BEING_DEFINED (current_class_type
)
5999 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6000 && (DECL_INITIAL (decl
) || init
))
6001 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6003 auto_node
= type_uses_auto (type
);
6007 if (init
== NULL_TREE
)
6009 error ("declaration of %q#D has no initializer", decl
);
6010 TREE_TYPE (decl
) = error_mark_node
;
6014 if (TREE_CODE (d_init
) == TREE_LIST
)
6015 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6016 tf_warning_or_error
);
6017 d_init
= resolve_nondeduced_context (d_init
);
6018 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6020 if (type
== error_mark_node
)
6024 if (!ensure_literal_type_for_constexpr_object (decl
))
6025 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6027 if (TREE_CODE (decl
) == VAR_DECL
6028 && DECL_CLASS_SCOPE_P (decl
)
6029 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6030 check_static_variable_definition (decl
, type
);
6032 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6035 if (init
== ridpointers
[(int)RID_DELETE
])
6037 /* FIXME check this is 1st decl. */
6038 DECL_DELETED_FN (decl
) = 1;
6039 DECL_DECLARED_INLINE_P (decl
) = 1;
6040 DECL_INITIAL (decl
) = error_mark_node
;
6041 FOR_EACH_CLONE (clone
, decl
)
6043 DECL_DELETED_FN (clone
) = 1;
6044 DECL_DECLARED_INLINE_P (clone
) = 1;
6045 DECL_INITIAL (clone
) = error_mark_node
;
6049 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6051 if (defaultable_fn_check (decl
))
6052 DECL_DEFAULTED_FN (decl
) = 1;
6054 DECL_INITIAL (decl
) = NULL_TREE
;
6058 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6060 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6061 /* If DECL is a reference, then we want to know whether init is a
6062 reference constant; init_const_expr_p as passed tells us whether
6063 it's an rvalue constant. */
6064 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6065 init_const_expr_p
= potential_constant_expression (init
);
6066 if (init_const_expr_p
)
6068 /* Set these flags now for templates. We'll update the flags in
6069 store_init_value for instantiations. */
6070 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6071 if (decl_maybe_constant_var_p (decl
))
6072 TREE_CONSTANT (decl
) = 1;
6076 if (processing_template_decl
)
6078 bool type_dependent_p
;
6080 /* Add this declaration to the statement-tree. */
6081 if (at_function_scope_p ())
6082 add_decl_expr (decl
);
6084 type_dependent_p
= dependent_type_p (type
);
6086 if (check_for_bare_parameter_packs (init
))
6089 DECL_INITIAL (decl
) = NULL_TREE
;
6092 /* Generally, initializers in templates are expanded when the
6093 template is instantiated. But, if DECL is a variable constant
6094 then it can be used in future constant expressions, so its value
6095 must be available. */
6097 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6098 /* We can't do anything if the decl has dependent type. */;
6100 && init_const_expr_p
6101 && !type_dependent_p
6102 && decl_maybe_constant_var_p (decl
)
6103 && !type_dependent_init_p (init
)
6104 && !value_dependent_init_p (init
))
6106 /* This variable seems to be a non-dependent constant, so process
6107 its initializer. If check_initializer returns non-null the
6108 initialization wasn't constant after all. */
6110 cleanups
= make_tree_vector ();
6111 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6112 if (init_code
== NULL_TREE
)
6114 release_tree_vector (cleanups
);
6116 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6117 /* Deduce array size even if the initializer is dependent. */
6118 maybe_deduce_size_from_array_init (decl
, init
);
6121 DECL_INITIAL (decl
) = init
;
6125 /* Just store non-static data member initializers for later. */
6126 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6127 DECL_INITIAL (decl
) = init
;
6129 /* Take care of TYPE_DECLs up front. */
6130 if (TREE_CODE (decl
) == TYPE_DECL
)
6132 if (type
!= error_mark_node
6133 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6135 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6136 warning (0, "shadowing previous type declaration of %q#D", decl
);
6137 set_identifier_type_value (DECL_NAME (decl
), decl
);
6140 /* If we have installed this as the canonical typedef for this
6141 type, and that type has not been defined yet, delay emitting
6142 the debug information for it, as we will emit it later. */
6143 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6144 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6145 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6147 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6152 /* A reference will be modified here, as it is initialized. */
6153 if (! DECL_EXTERNAL (decl
)
6154 && TREE_READONLY (decl
)
6155 && TREE_CODE (type
) == REFERENCE_TYPE
)
6158 TREE_READONLY (decl
) = 0;
6161 if (TREE_CODE (decl
) == VAR_DECL
)
6163 /* Only variables with trivial initialization and destruction can
6164 have thread-local storage. */
6165 if (DECL_THREAD_LOCAL_P (decl
)
6166 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
6167 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
6168 error ("%qD cannot be thread-local because it has non-trivial "
6169 "type %qT", decl
, TREE_TYPE (decl
));
6170 /* If this is a local variable that will need a mangled name,
6171 register it now. We must do this before processing the
6172 initializer for the variable, since the initialization might
6173 require a guard variable, and since the mangled name of the
6174 guard variable will depend on the mangled name of this
6176 if (DECL_FUNCTION_SCOPE_P (decl
)
6177 && TREE_STATIC (decl
)
6178 && !DECL_ARTIFICIAL (decl
))
6180 push_local_name (decl
);
6181 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6182 || DECL_DESTRUCTOR_P (current_function_decl
))
6183 /* Normally local_decls is populated during GIMPLE lowering,
6184 but [cd]tors are never actually compiled directly. We need
6185 to put statics on the list so we can deal with the label
6186 address extension. */
6187 add_local_decl (cfun
, decl
);
6190 /* Convert the initializer to the type of DECL, if we have not
6191 already initialized DECL. */
6192 if (!DECL_INITIALIZED_P (decl
)
6193 /* If !DECL_EXTERNAL then DECL is being defined. In the
6194 case of a static data member initialized inside the
6195 class-specifier, there can be an initializer even if DECL
6196 is *not* defined. */
6197 && (!DECL_EXTERNAL (decl
) || init
))
6199 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6202 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6203 /* Allow libjava/prims.cc define primitive classes. */
6204 if (init
!= NULL_TREE
6205 || jclass
== NULL_TREE
6206 || TREE_CODE (jclass
) != TYPE_DECL
6207 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6208 || !same_type_ignoring_top_level_qualifiers_p
6209 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6210 error ("Java object %qD not allocated with %<new%>", decl
);
6213 cleanups
= make_tree_vector ();
6214 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6215 /* Thread-local storage cannot be dynamically initialized. */
6216 if (DECL_THREAD_LOCAL_P (decl
) && init
)
6218 error ("%qD is thread-local and so cannot be dynamically "
6219 "initialized", decl
);
6223 /* Check that the initializer for a static data member was a
6224 constant. Although we check in the parser that the
6225 initializer is an integral constant expression, we do not
6226 simplify division-by-zero at the point at which it
6227 occurs. Therefore, in:
6229 struct S { static const int i = 7 / 0; };
6231 we issue an error at this point. It would
6232 probably be better to forbid division by zero in
6233 integral constant expressions. */
6234 if (DECL_EXTERNAL (decl
) && init
)
6236 error ("%qD cannot be initialized by a non-constant expression"
6237 " when being declared", decl
);
6238 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6246 The memory occupied by any object of static storage
6247 duration is zero-initialized at program startup before
6248 any other initialization takes place.
6250 We cannot create an appropriate initializer until after
6251 the type of DECL is finalized. If DECL_INITIAL is set,
6252 then the DECL is statically initialized, and any
6253 necessary zero-initialization has already been performed. */
6254 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6255 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6256 /*nelts=*/NULL_TREE
,
6257 /*static_storage_p=*/true);
6258 /* Remember that the initialization for this variable has
6260 DECL_INITIALIZED_P (decl
) = 1;
6261 /* This declaration is the definition of this variable,
6262 unless we are initializing a static data member within
6263 the class specifier. */
6264 if (!DECL_EXTERNAL (decl
))
6265 var_definition_p
= true;
6267 /* If the variable has an array type, lay out the type, even if
6268 there is no initializer. It is valid to index through the
6269 array, and we must get TYPE_ALIGN set correctly on the array
6271 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6274 if (TREE_STATIC (decl
)
6275 && !at_function_scope_p ()
6276 && current_function_decl
== NULL
)
6277 /* So decl is a global variable or a static member of a
6278 non local class. Record the types it uses
6279 so that we can decide later to emit debug info for them. */
6280 record_types_used_by_current_var_decl (decl
);
6282 else if (TREE_CODE (decl
) == FIELD_DECL
6283 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6284 error ("non-static data member %qD has Java class type", decl
);
6286 /* Add this declaration to the statement-tree. This needs to happen
6287 after the call to check_initializer so that the DECL_EXPR for a
6288 reference temp is added before the DECL_EXPR for the reference itself. */
6289 if (DECL_FUNCTION_SCOPE_P (decl
))
6290 add_decl_expr (decl
);
6292 /* Let the middle end know about variables and functions -- but not
6293 static data members in uninstantiated class templates. */
6294 if (TREE_CODE (decl
) == VAR_DECL
6295 || TREE_CODE (decl
) == FUNCTION_DECL
)
6297 if (TREE_CODE (decl
) == VAR_DECL
)
6299 layout_var_decl (decl
);
6300 maybe_commonize_var (decl
);
6303 /* This needs to happen after the linkage is set. */
6304 determine_visibility (decl
);
6306 if (var_definition_p
&& TREE_STATIC (decl
))
6308 /* If a TREE_READONLY variable needs initialization
6309 at runtime, it is no longer readonly and we need to
6310 avoid MEM_READONLY_P being set on RTL created for it. */
6313 if (TREE_READONLY (decl
))
6314 TREE_READONLY (decl
) = 0;
6317 else if (was_readonly
)
6318 TREE_READONLY (decl
) = 1;
6321 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6323 /* Check for abstractness of the type. Notice that there is no
6324 need to strip array types here since the check for those types
6325 is already done within create_array_type_for_decl. */
6326 if (TREE_CODE (type
) == FUNCTION_TYPE
6327 || TREE_CODE (type
) == METHOD_TYPE
)
6328 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6330 abstract_virtuals_error (decl
, type
);
6332 if (TREE_TYPE (decl
) == error_mark_node
)
6333 /* No initialization required. */
6335 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6339 if (init
== ridpointers
[(int)RID_DEFAULT
])
6341 /* An out-of-class default definition is defined at
6342 the point where it is explicitly defaulted. */
6343 if (DECL_DELETED_FN (decl
))
6344 maybe_explain_implicit_delete (decl
);
6345 else if (DECL_INITIAL (decl
) == error_mark_node
)
6346 synthesize_method (decl
);
6349 error ("function %q#D is initialized like a variable", decl
);
6351 /* else no initialization required. */
6353 else if (DECL_EXTERNAL (decl
)
6354 && ! (DECL_LANG_SPECIFIC (decl
)
6355 && DECL_NOT_REALLY_EXTERN (decl
)))
6358 DECL_INITIAL (decl
) = init
;
6360 /* A variable definition. */
6361 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6362 /* Initialize the local variable. */
6363 initialize_local_var (decl
, init
);
6365 /* If a variable is defined, and then a subsequent
6366 definition with external linkage is encountered, we will
6367 get here twice for the same variable. We want to avoid
6368 calling expand_static_init more than once. For variables
6369 that are not static data members, we can call
6370 expand_static_init only when we actually process the
6371 initializer. It is not legal to redeclare a static data
6372 member, so this issue does not arise in that case. */
6373 else if (var_definition_p
&& TREE_STATIC (decl
))
6374 expand_static_init (decl
, init
);
6377 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6378 reference, insert it in the statement-tree now. */
6382 FOR_EACH_VEC_ELT (tree
, cleanups
, i
, t
)
6383 push_cleanup (decl
, t
, false);
6384 release_tree_vector (cleanups
);
6388 TREE_READONLY (decl
) = 1;
6390 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6393 /* Returns a declaration for a VAR_DECL as if:
6395 extern "C" TYPE NAME;
6397 had been seen. Used to create compiler-generated global
6401 declare_global_var (tree name
, tree type
)
6405 push_to_top_level ();
6406 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6407 TREE_PUBLIC (decl
) = 1;
6408 DECL_EXTERNAL (decl
) = 1;
6409 DECL_ARTIFICIAL (decl
) = 1;
6410 /* If the user has explicitly declared this variable (perhaps
6411 because the code we are compiling is part of a low-level runtime
6412 library), then it is possible that our declaration will be merged
6413 with theirs by pushdecl. */
6414 decl
= pushdecl (decl
);
6415 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6416 pop_from_top_level ();
6421 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6422 if "__cxa_atexit" is not being used) corresponding to the function
6423 to be called when the program exits. */
6426 get_atexit_fn_ptr_type (void)
6430 if (!atexit_fn_ptr_type_node
)
6433 if (flag_use_cxa_atexit
6434 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6435 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6436 arg_type
= ptr_type_node
;
6438 /* The parameter to "atexit" is "void (*)(void)". */
6439 arg_type
= NULL_TREE
;
6441 fn_type
= build_function_type_list (void_type_node
,
6442 arg_type
, NULL_TREE
);
6443 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6446 return atexit_fn_ptr_type_node
;
6449 /* Returns a pointer to the `atexit' function. Note that if
6450 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6451 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6454 get_atexit_node (void)
6460 bool use_aeabi_atexit
;
6465 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6467 /* The declaration for `__cxa_atexit' is:
6469 int __cxa_atexit (void (*)(void *), void *, void *)
6471 We build up the argument types and then the function type
6473 tree argtype0
, argtype1
, argtype2
;
6475 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6476 /* First, build the pointer-to-function type for the first
6478 fn_ptr_type
= get_atexit_fn_ptr_type ();
6479 /* Then, build the rest of the argument types. */
6480 argtype2
= ptr_type_node
;
6481 if (use_aeabi_atexit
)
6483 argtype1
= fn_ptr_type
;
6484 argtype0
= ptr_type_node
;
6488 argtype1
= ptr_type_node
;
6489 argtype0
= fn_ptr_type
;
6491 /* And the final __cxa_atexit type. */
6492 fn_type
= build_function_type_list (integer_type_node
,
6493 argtype0
, argtype1
, argtype2
,
6495 fn_ptr_type
= build_pointer_type (fn_type
);
6496 if (use_aeabi_atexit
)
6497 name
= "__aeabi_atexit";
6499 name
= "__cxa_atexit";
6503 /* The declaration for `atexit' is:
6505 int atexit (void (*)());
6507 We build up the argument types and then the function type
6509 fn_ptr_type
= get_atexit_fn_ptr_type ();
6510 /* Build the final atexit type. */
6511 fn_type
= build_function_type_list (integer_type_node
,
6512 fn_ptr_type
, NULL_TREE
);
6516 /* Now, build the function declaration. */
6517 push_lang_context (lang_name_c
);
6518 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6519 mark_used (atexit_fndecl
);
6520 pop_lang_context ();
6521 atexit_node
= decay_conversion (atexit_fndecl
);
6526 /* Returns the __dso_handle VAR_DECL. */
6529 get_dso_handle_node (void)
6531 if (dso_handle_node
)
6532 return dso_handle_node
;
6534 /* Declare the variable. */
6535 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6538 #ifdef HAVE_GAS_HIDDEN
6539 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6540 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6543 return dso_handle_node
;
6546 /* Begin a new function with internal linkage whose job will be simply
6547 to destroy some particular variable. */
6549 static GTY(()) int start_cleanup_cnt
;
6552 start_cleanup_fn (void)
6557 bool use_cxa_atexit
= flag_use_cxa_atexit
6558 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6560 push_to_top_level ();
6562 /* No need to mangle this. */
6563 push_lang_context (lang_name_c
);
6565 /* Build the name of the function. */
6566 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6567 /* Build the function declaration. */
6568 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6569 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6570 /* It's a function with internal linkage, generated by the
6572 TREE_PUBLIC (fndecl
) = 0;
6573 DECL_ARTIFICIAL (fndecl
) = 1;
6574 /* Make the function `inline' so that it is only emitted if it is
6575 actually needed. It is unlikely that it will be inlined, since
6576 it is only called via a function pointer, but we avoid unnecessary
6577 emissions this way. */
6578 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6579 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6580 /* Build the parameter. */
6585 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6586 DECL_CONTEXT (parmdecl
) = fndecl
;
6587 TREE_USED (parmdecl
) = 1;
6588 DECL_READ_P (parmdecl
) = 1;
6589 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6593 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6595 pop_lang_context ();
6597 return current_function_decl
;
6600 /* Finish the cleanup function begun by start_cleanup_fn. */
6603 end_cleanup_fn (void)
6605 expand_or_defer_fn (finish_function (0));
6607 pop_from_top_level ();
6610 /* Generate code to handle the destruction of DECL, an object with
6611 static storage duration. */
6614 register_dtor_fn (tree decl
)
6621 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6623 type
= TREE_TYPE (decl
);
6624 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6625 return void_zero_node
;
6627 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6628 a class object, we can just pass the destructor to
6629 "__cxa_atexit"; we don't have to build a temporary function to do
6631 use_dtor
= (flag_use_cxa_atexit
6632 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6633 && CLASS_TYPE_P (type
));
6638 /* Find the destructor. */
6639 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6640 gcc_assert (idx
>= 0);
6641 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6642 /* Make sure it is accessible. */
6643 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6647 /* Call build_cleanup before we enter the anonymous function so
6648 that any access checks will be done relative to the current
6649 scope, rather than the scope of the anonymous function. */
6650 build_cleanup (decl
);
6652 /* Now start the function. */
6653 cleanup
= start_cleanup_fn ();
6655 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6656 to the original function, rather than the anonymous one. That
6657 will make the back end think that nested functions are in use,
6658 which causes confusion. */
6659 push_deferring_access_checks (dk_no_check
);
6660 fcall
= build_cleanup (decl
);
6661 pop_deferring_access_checks ();
6663 /* Create the body of the anonymous function. */
6664 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6665 finish_expr_stmt (fcall
);
6666 finish_compound_stmt (compound_stmt
);
6670 /* Call atexit with the cleanup function. */
6671 mark_used (cleanup
);
6672 cleanup
= build_address (cleanup
);
6673 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6679 /* We must convert CLEANUP to the type that "__cxa_atexit"
6681 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6682 /* "__cxa_atexit" will pass the address of DECL to the
6683 cleanup function. */
6685 addr
= build_address (decl
);
6686 /* The declared type of the parameter to "__cxa_atexit" is
6687 "void *". For plain "T*", we could just let the
6688 machinery in cp_build_function_call convert it -- but if the
6689 type is "cv-qualified T *", then we need to convert it
6690 before passing it in, to avoid spurious errors. */
6691 addr
= build_nop (ptr_type_node
, addr
);
6694 /* Since the cleanup functions we build ignore the address
6695 they're given, there's no reason to pass the actual address
6696 in, and, in general, it's cheaper to pass NULL than any
6698 addr
= null_pointer_node
;
6699 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6700 tf_warning_or_error
);
6701 if (targetm
.cxx
.use_aeabi_atexit ())
6714 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6715 arg0
, arg1
, arg2
, NULL_TREE
);
6718 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6719 is its initializer. Generate code to handle the construction
6720 and destruction of DECL. */
6723 expand_static_init (tree decl
, tree init
)
6725 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6726 gcc_assert (TREE_STATIC (decl
));
6728 /* Some variables require no dynamic initialization. */
6730 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6733 if (DECL_FUNCTION_SCOPE_P (decl
))
6735 /* Emit code to perform this initialization but once. */
6736 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6737 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6738 tree guard
, guard_addr
;
6741 /* Emit code to perform this initialization but once. This code
6744 static <type> guard;
6745 if (!guard.first_byte) {
6746 if (__cxa_guard_acquire (&guard)) {
6749 // Do initialization.
6750 flag = true; __cxa_guard_release (&guard);
6751 // Register variable for destruction at end of program.
6753 if (!flag) __cxa_guard_abort (&guard);
6757 Note that the `flag' variable is only set to 1 *after* the
6758 initialization is complete. This ensures that an exception,
6759 thrown during the construction, will cause the variable to
6760 reinitialized when we pass through this code again, as per:
6764 If the initialization exits by throwing an exception, the
6765 initialization is not complete, so it will be tried again
6766 the next time control enters the declaration.
6768 This process should be thread-safe, too; multiple threads
6769 should not be able to initialize the variable more than
6772 /* Create the guard variable. */
6773 guard
= get_guard (decl
);
6775 /* This optimization isn't safe on targets with relaxed memory
6776 consistency. On such targets we force synchronization in
6777 __cxa_guard_acquire. */
6778 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6780 /* Begin the conditional initialization. */
6781 if_stmt
= begin_if_stmt ();
6782 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6783 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6786 if (flag_threadsafe_statics
)
6788 tree vfntype
= NULL_TREE
;
6789 tree acquire_name
, release_name
, abort_name
;
6790 tree acquire_fn
, release_fn
, abort_fn
;
6791 guard_addr
= build_address (guard
);
6793 acquire_name
= get_identifier ("__cxa_guard_acquire");
6794 release_name
= get_identifier ("__cxa_guard_release");
6795 abort_name
= get_identifier ("__cxa_guard_abort");
6796 acquire_fn
= identifier_global_value (acquire_name
);
6797 release_fn
= identifier_global_value (release_name
);
6798 abort_fn
= identifier_global_value (abort_name
);
6800 acquire_fn
= push_library_fn
6801 (acquire_name
, build_function_type_list (integer_type_node
,
6802 TREE_TYPE (guard_addr
),
6805 if (!release_fn
|| !abort_fn
)
6806 vfntype
= build_function_type_list (void_type_node
,
6807 TREE_TYPE (guard_addr
),
6810 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6812 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6814 inner_if_stmt
= begin_if_stmt ();
6815 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6818 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6819 begin
= get_target_expr (boolean_false_node
);
6820 flag
= TARGET_EXPR_SLOT (begin
);
6822 TARGET_EXPR_CLEANUP (begin
)
6823 = build3 (COND_EXPR
, void_type_node
, flag
,
6825 build_call_n (abort_fn
, 1, guard_addr
));
6826 CLEANUP_EH_ONLY (begin
) = 1;
6828 /* Do the initialization itself. */
6829 init
= add_stmt_to_compound (begin
, init
);
6830 init
= add_stmt_to_compound
6831 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6832 init
= add_stmt_to_compound
6833 (init
, build_call_n (release_fn
, 1, guard_addr
));
6836 init
= add_stmt_to_compound (init
, set_guard (guard
));
6838 /* Use atexit to register a function for destroying this static
6840 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6842 finish_expr_stmt (init
);
6844 if (flag_threadsafe_statics
)
6846 finish_compound_stmt (inner_then_clause
);
6847 finish_then_clause (inner_if_stmt
);
6848 finish_if_stmt (inner_if_stmt
);
6851 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6853 finish_compound_stmt (then_clause
);
6854 finish_then_clause (if_stmt
);
6855 finish_if_stmt (if_stmt
);
6859 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6863 /* Make TYPE a complete type based on INITIAL_VALUE.
6864 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6865 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6866 3 if the initializer list is empty (in pedantic mode). */
6869 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6872 tree type
, elt_type
;
6876 unsigned HOST_WIDE_INT i
;
6879 /* An array of character type can be initialized from a
6880 brace-enclosed string constant.
6882 FIXME: this code is duplicated from reshape_init. Probably
6883 we should just call reshape_init here? */
6884 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6885 && TREE_CODE (initial_value
) == CONSTRUCTOR
6886 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6888 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6889 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6891 if (TREE_CODE (value
) == STRING_CST
6892 && VEC_length (constructor_elt
, v
) == 1)
6893 initial_value
= value
;
6896 /* If any of the elements are parameter packs, we can't actually
6897 complete this type now because the array size is dependent. */
6898 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6900 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6903 if (PACK_EXPANSION_P (value
))
6909 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6911 /* We can create the array before the element type is complete, which
6912 means that we didn't have these two bits set in the original type
6913 either. In completing the type, we are expected to propagate these
6914 bits. See also complete_type which does the same thing for arrays
6917 if (TYPE_DOMAIN (type
))
6919 elt_type
= TREE_TYPE (type
);
6920 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6921 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6922 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6928 /* As above, but either give an error or reject zero-size arrays, depending
6932 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
6933 bool do_default
, tsubst_flags_t complain
)
6936 bool sfinae
= !(complain
& tf_error
);
6937 /* In SFINAE context we can't be lenient about zero-size arrays. */
6940 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
6946 /* Not an error. */;
6947 else if (failure
== 1)
6948 error ("initializer fails to determine size of %qT", *ptype
);
6949 else if (failure
== 2)
6952 error ("array size missing in %qT", *ptype
);
6954 else if (failure
== 3)
6955 error ("zero-size array %qT", *ptype
);
6956 *ptype
= error_mark_node
;
6961 /* Return zero if something is declared to be a member of type
6962 CTYPE when in the context of CUR_TYPE. STRING is the error
6963 message to print in that case. Otherwise, quietly return 1. */
6966 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6968 if (ctype
&& ctype
!= cur_type
)
6970 if (flags
== DTOR_FLAG
)
6971 error ("destructor for alien class %qT cannot be a member", ctype
);
6973 error ("constructor for alien class %qT cannot be a member", ctype
);
6979 /* Subroutine of `grokdeclarator'. */
6981 /* Generate errors possibly applicable for a given set of specifiers.
6982 This is for ARM $7.1.2. */
6985 bad_specifiers (tree object
,
6986 enum bad_spec_place type
,
6997 error ("%qD declared as a %<virtual%> variable", object
);
6999 error ("%qD declared as an %<inline%> variable", object
);
7001 error ("%<const%> and %<volatile%> function specifiers on "
7002 "%qD invalid in variable declaration", object
);
7006 error ("%qD declared as a %<virtual%> parameter", object
);
7008 error ("%qD declared as an %<inline%> parameter", object
);
7010 error ("%<const%> and %<volatile%> function specifiers on "
7011 "%qD invalid in parameter declaration", object
);
7015 error ("%qD declared as a %<virtual%> type", object
);
7017 error ("%qD declared as an %<inline%> type", object
);
7019 error ("%<const%> and %<volatile%> function specifiers on "
7020 "%qD invalid in type declaration", object
);
7024 error ("%qD declared as a %<virtual%> field", object
);
7026 error ("%qD declared as an %<inline%> field", object
);
7028 error ("%<const%> and %<volatile%> function specifiers on "
7029 "%qD invalid in field declaration", object
);
7035 error ("%q+D declared as a friend", object
);
7037 && (TREE_CODE (object
) == TYPE_DECL
7038 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7039 && !TYPE_REFFN_P (TREE_TYPE (object
))
7040 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7041 error ("%q+D declared with an exception specification", object
);
7044 /* DECL is a member function or static data member and is presently
7045 being defined. Check that the definition is taking place in a
7049 check_class_member_definition_namespace (tree decl
)
7051 /* These checks only apply to member functions and static data
7053 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7054 || TREE_CODE (decl
) == VAR_DECL
);
7055 /* We check for problems with specializations in pt.c in
7056 check_specialization_namespace, where we can issue better
7058 if (processing_specialization
)
7060 /* There are no restrictions on the placement of
7061 explicit instantiations. */
7062 if (processing_explicit_instantiation
)
7066 A member function definition that appears outside of the
7067 class definition shall appear in a namespace scope enclosing
7068 the class definition.
7072 The definition for a static data member shall appear in a
7073 namespace scope enclosing the member's class definition. */
7074 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7075 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7076 decl
, DECL_CONTEXT (decl
));
7079 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7080 METHOD_TYPE for a non-static member function; QUALS are the
7081 cv-qualifiers that apply to the function. */
7084 build_this_parm (tree type
, cp_cv_quals quals
)
7089 cp_cv_quals this_quals
;
7091 if (CLASS_TYPE_P (type
))
7094 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7095 this_type
= build_pointer_type (this_type
);
7098 this_type
= type_of_this_parm (type
);
7099 /* The `this' parameter is implicitly `const'; it cannot be
7101 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7102 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7103 parm
= build_artificial_parm (this_identifier
, qual_type
);
7104 cp_apply_type_quals_to_decl (this_quals
, parm
);
7108 /* DECL is a static member function. Complain if it was declared
7109 with function-cv-quals. */
7112 check_static_quals (tree decl
, cp_cv_quals quals
)
7114 if (quals
!= TYPE_UNQUALIFIED
)
7115 error ("static member function %q#D declared with type qualifiers",
7119 /* CTYPE is class type, or null if non-class.
7120 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7122 DECLARATOR is the function's name.
7123 PARMS is a chain of PARM_DECLs for the function.
7124 VIRTUALP is truthvalue of whether the function is virtual or not.
7125 FLAGS are to be passed through to `grokclassfn'.
7126 QUALS are qualifiers indicating whether the function is `const'
7128 RAISES is a list of exceptions that this function can raise.
7129 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7130 not look, and -1 if we should not call `grokclassfn' at all.
7132 SFK is the kind of special function (if any) for the new function.
7134 Returns `NULL_TREE' if something goes wrong, after issuing
7135 applicable error messages. */
7138 grokfndecl (tree ctype
,
7142 tree orig_declarator
,
7144 enum overload_flags flags
,
7151 special_function_kind sfk
,
7156 location_t location
)
7159 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7163 type
= build_exception_variant (type
, raises
);
7165 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7167 /* If we have an explicit location, use it, otherwise use whatever
7168 build_lang_decl used (probably input_location). */
7169 if (location
!= UNKNOWN_LOCATION
)
7170 DECL_SOURCE_LOCATION (decl
) = location
;
7172 if (TREE_CODE (type
) == METHOD_TYPE
)
7175 parm
= build_this_parm (type
, quals
);
7176 DECL_CHAIN (parm
) = parms
;
7179 DECL_ARGUMENTS (decl
) = parms
;
7180 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7181 DECL_CONTEXT (t
) = decl
;
7182 /* Propagate volatile out from type to decl. */
7183 if (TYPE_VOLATILE (type
))
7184 TREE_THIS_VOLATILE (decl
) = 1;
7186 /* Setup decl according to sfk. */
7189 case sfk_constructor
:
7190 case sfk_copy_constructor
:
7191 case sfk_move_constructor
:
7192 DECL_CONSTRUCTOR_P (decl
) = 1;
7194 case sfk_destructor
:
7195 DECL_DESTRUCTOR_P (decl
) = 1;
7201 /* If pointers to member functions use the least significant bit to
7202 indicate whether a function is virtual, ensure a pointer
7203 to this function will have that bit clear. */
7204 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7205 && TREE_CODE (type
) == METHOD_TYPE
7206 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7207 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7210 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7214 ("defining explicit specialization %qD in friend declaration",
7218 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7219 tree args
= TREE_OPERAND (orig_declarator
, 1);
7221 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7223 /* Something like `template <class T> friend void f<T>()'. */
7224 error ("invalid use of template-id %qD in declaration "
7225 "of primary template",
7231 /* A friend declaration of the form friend void f<>(). Record
7232 the information in the TEMPLATE_ID_EXPR. */
7233 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7235 if (TREE_CODE (fns
) == COMPONENT_REF
)
7237 /* Due to bison parser ickiness, we will have already looked
7238 up an operator_name or PFUNCNAME within the current class
7239 (see template_id in parse.y). If the current class contains
7240 such a name, we'll get a COMPONENT_REF here. Undo that. */
7242 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7243 == current_class_type
);
7244 fns
= TREE_OPERAND (fns
, 1);
7246 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7247 || TREE_CODE (fns
) == OVERLOAD
);
7248 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7250 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7251 if (TREE_PURPOSE (t
)
7252 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7254 error ("default arguments are not allowed in declaration "
7255 "of friend template specialization %qD",
7262 error ("%<inline%> is not allowed in declaration of friend "
7263 "template specialization %qD",
7270 /* If this decl has namespace scope, set that up. */
7272 set_decl_namespace (decl
, in_namespace
, friendp
);
7274 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7276 /* `main' and builtins have implicit 'C' linkage. */
7277 if ((MAIN_NAME_P (declarator
)
7278 || (IDENTIFIER_LENGTH (declarator
) > 10
7279 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7280 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7281 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7282 && current_lang_name
== lang_name_cplusplus
7283 && ctype
== NULL_TREE
7284 && DECL_FILE_SCOPE_P (decl
))
7285 SET_DECL_LANGUAGE (decl
, lang_c
);
7287 /* Should probably propagate const out from type to decl I bet (mrs). */
7290 DECL_STATIC_FUNCTION_P (decl
) = 1;
7291 DECL_CONTEXT (decl
) = ctype
;
7296 DECL_CONTEXT (decl
) = ctype
;
7298 check_class_member_definition_namespace (decl
);
7301 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7303 if (processing_template_decl
)
7304 error ("cannot declare %<::main%> to be a template");
7306 error ("cannot declare %<::main%> to be inline");
7308 error ("cannot declare %<::main%> to be static");
7313 /* Members of anonymous types and local classes have no linkage; make
7314 them internal. If a typedef is made later, this will be changed. */
7315 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7316 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7319 if (publicp
&& cxx_dialect
== cxx98
)
7321 /* [basic.link]: A name with no linkage (notably, the name of a class
7322 or enumeration declared in a local scope) shall not be used to
7323 declare an entity with linkage.
7325 DR 757 relaxes this restriction for C++0x. */
7326 t
= no_linkage_check (TREE_TYPE (decl
),
7327 /*relaxed_p=*/false);
7330 if (TYPE_ANONYMOUS_P (t
))
7332 if (DECL_EXTERN_C_P (decl
))
7333 /* Allow this; it's pretty common in C. */;
7336 permerror (input_location
, "anonymous type with no linkage "
7337 "used to declare function %q#D with linkage",
7339 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7340 permerror (input_location
, "%q+#D does not refer to the unqualified "
7341 "type, so it is not used for linkage",
7346 permerror (input_location
, "type %qT with no linkage used to "
7347 "declare function %q#D with linkage", t
, decl
);
7351 TREE_PUBLIC (decl
) = publicp
;
7354 DECL_INTERFACE_KNOWN (decl
) = 1;
7355 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7358 /* If the declaration was declared inline, mark it as such. */
7360 DECL_DECLARED_INLINE_P (decl
) = 1;
7362 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7364 DECL_EXTERNAL (decl
) = 1;
7365 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7368 ? G_("static member function %qD cannot have cv-qualifier")
7369 : G_("non-member function %qD cannot have cv-qualifier"),
7371 quals
= TYPE_UNQUALIFIED
;
7374 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7375 && !grok_op_properties (decl
, /*complain=*/true))
7377 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7379 bool long_long_unsigned_p
;
7381 const char *suffix
= NULL
;
7382 /* [over.literal]/6: Literal operators shall not have C linkage. */
7383 if (DECL_LANGUAGE (decl
) == lang_c
)
7385 error ("literal operator with C linkage");
7389 if (DECL_NAMESPACE_SCOPE_P (decl
))
7391 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7394 error ("%qD has invalid argument list", decl
);
7398 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7399 if (long_long_unsigned_p
)
7401 if (cpp_interpret_int_suffix (suffix
, strlen (suffix
)))
7402 warning (0, "integer suffix %<%s%>"
7403 " shadowed by implementation", suffix
);
7405 else if (long_double_p
)
7407 if (cpp_interpret_float_suffix (suffix
, strlen (suffix
)))
7408 warning (0, "floating point suffix %<%s%>"
7409 " shadowed by implementation", suffix
);
7414 error ("%qD must be a non-member function", decl
);
7420 /* Make the init_value nonzero so pushdecl knows this is not
7421 tentative. error_mark_node is replaced later with the BLOCK. */
7422 DECL_INITIAL (decl
) = error_mark_node
;
7424 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7425 TREE_NOTHROW (decl
) = 1;
7427 /* Caller will do the rest of this. */
7431 if (ctype
!= NULL_TREE
)
7432 grokclassfn (ctype
, decl
, flags
);
7434 decl
= check_explicit_specialization (orig_declarator
, decl
,
7437 4 * (friendp
!= 0));
7438 if (decl
== error_mark_node
)
7441 if (DECL_STATIC_FUNCTION_P (decl
))
7442 check_static_quals (decl
, quals
);
7446 cplus_decl_attributes (&decl
, *attrlist
, 0);
7447 *attrlist
= NULL_TREE
;
7450 /* Check main's type after attributes have been applied. */
7451 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7453 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7456 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7458 error ("%<::main%> must return %<int%>");
7459 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7460 TREE_TYPE (decl
) = newtype
;
7463 check_main_parameter_types (decl
);
7466 if (ctype
!= NULL_TREE
7467 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7470 tree old_decl
= check_classfn (ctype
, decl
,
7471 (processing_template_decl
7472 > template_class_depth (ctype
))
7473 ? current_template_parms
7476 if (old_decl
== error_mark_node
)
7484 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7485 /* Because grokfndecl is always supposed to return a
7486 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7487 here. We depend on our callers to figure out that its
7488 really a template that's being returned. */
7489 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7491 if (DECL_STATIC_FUNCTION_P (old_decl
)
7492 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7494 /* Remove the `this' parm added by grokclassfn. */
7495 revert_static_member_fn (decl
);
7496 check_static_quals (decl
, quals
);
7498 if (DECL_ARTIFICIAL (old_decl
))
7500 error ("definition of implicitly-declared %qD", old_decl
);
7503 else if (DECL_DEFAULTED_FN (old_decl
))
7505 error ("definition of explicitly-defaulted %q+D", decl
);
7506 error ("%q+#D explicitly defaulted here", old_decl
);
7510 /* Since we've smashed OLD_DECL to its
7511 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7512 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7513 decl
= DECL_TEMPLATE_RESULT (decl
);
7515 /* Attempt to merge the declarations. This can fail, in
7516 the case of some invalid specialization declarations. */
7517 pushed_scope
= push_scope (ctype
);
7518 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7520 pop_scope (pushed_scope
);
7523 error ("no %q#D member function declared in class %qT",
7531 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7534 if (ctype
== NULL_TREE
|| check
)
7538 DECL_VIRTUAL_P (decl
) = 1;
7543 /* decl is a FUNCTION_DECL.
7544 specifiers are the parsed virt-specifiers.
7546 Set flags to reflect the virt-specifiers.
7551 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7553 if (decl
== NULL_TREE
)
7555 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7556 DECL_OVERRIDE_P (decl
) = 1;
7557 if (specifiers
& VIRT_SPEC_FINAL
)
7558 DECL_FINAL_P (decl
) = 1;
7562 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7563 the linkage that DECL will receive in the object file. */
7566 set_linkage_for_static_data_member (tree decl
)
7568 /* A static data member always has static storage duration and
7569 external linkage. Note that static data members are forbidden in
7570 local classes -- the only situation in which a class has
7571 non-external linkage. */
7572 TREE_PUBLIC (decl
) = 1;
7573 TREE_STATIC (decl
) = 1;
7574 /* For non-template classes, static data members are always put
7575 out in exactly those files where they are defined, just as
7576 with ordinary namespace-scope variables. */
7577 if (!processing_template_decl
)
7578 DECL_INTERFACE_KNOWN (decl
) = 1;
7581 /* Create a VAR_DECL named NAME with the indicated TYPE.
7583 If SCOPE is non-NULL, it is the class type or namespace containing
7584 the variable. If SCOPE is NULL, the variable should is created in
7585 the innermost enclosings scope. */
7588 grokvardecl (tree type
,
7590 const cp_decl_specifier_seq
*declspecs
,
7596 tree explicit_scope
;
7598 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7600 /* Compute the scope in which to place the variable, but remember
7601 whether or not that scope was explicitly specified by the user. */
7602 explicit_scope
= scope
;
7605 /* An explicit "extern" specifier indicates a namespace-scope
7607 if (declspecs
->storage_class
== sc_extern
)
7608 scope
= current_decl_namespace ();
7609 else if (!at_function_scope_p ())
7610 scope
= current_scope ();
7614 && (/* If the variable is a namespace-scope variable declared in a
7615 template, we need DECL_LANG_SPECIFIC. */
7616 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7617 /* Similarly for namespace-scope variables with language linkage
7619 || (TREE_CODE (scope
) == NAMESPACE_DECL
7620 && current_lang_name
!= lang_name_cplusplus
)
7621 /* Similarly for static data members. */
7623 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7625 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7627 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7628 set_decl_namespace (decl
, explicit_scope
, 0);
7630 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7632 if (declspecs
->storage_class
== sc_extern
)
7634 DECL_THIS_EXTERN (decl
) = 1;
7635 DECL_EXTERNAL (decl
) = !initialized
;
7638 if (DECL_CLASS_SCOPE_P (decl
))
7640 set_linkage_for_static_data_member (decl
);
7641 /* This function is only called with out-of-class definitions. */
7642 DECL_EXTERNAL (decl
) = 0;
7643 check_class_member_definition_namespace (decl
);
7645 /* At top level, either `static' or no s.c. makes a definition
7646 (perhaps tentative), and absence of `static' makes it public. */
7647 else if (toplevel_bindings_p ())
7649 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7650 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7651 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7653 /* Not at top level, only `static' makes a static definition. */
7656 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7657 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7660 if (declspecs
->specs
[(int)ds_thread
])
7661 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7663 /* If the type of the decl has no linkage, make sure that we'll
7664 notice that in mark_used. */
7665 if (cxx_dialect
> cxx98
7666 && decl_linkage (decl
) != lk_none
7667 && DECL_LANG_SPECIFIC (decl
) == NULL
7668 && !DECL_EXTERN_C_P (decl
)
7669 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7670 retrofit_lang_decl (decl
);
7672 if (TREE_PUBLIC (decl
))
7674 /* [basic.link]: A name with no linkage (notably, the name of a class
7675 or enumeration declared in a local scope) shall not be used to
7676 declare an entity with linkage.
7678 DR 757 relaxes this restriction for C++0x. */
7679 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7680 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7683 if (TYPE_ANONYMOUS_P (t
))
7685 if (DECL_EXTERN_C_P (decl
))
7686 /* Allow this; it's pretty common in C. */
7690 /* DRs 132, 319 and 389 seem to indicate types with
7691 no linkage can only be used to declare extern "C"
7692 entities. Since it's not always an error in the
7693 ISO C++ 90 Standard, we only issue a warning. */
7694 warning (0, "anonymous type with no linkage used to declare "
7695 "variable %q#D with linkage", decl
);
7696 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7697 warning (0, "%q+#D does not refer to the unqualified "
7698 "type, so it is not used for linkage",
7703 warning (0, "type %qT with no linkage used to declare variable "
7704 "%q#D with linkage", t
, decl
);
7708 DECL_INTERFACE_KNOWN (decl
) = 1;
7713 /* Create and return a canonical pointer to member function type, for
7714 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7717 build_ptrmemfunc_type (tree type
)
7721 tree unqualified_variant
= NULL_TREE
;
7723 if (type
== error_mark_node
)
7726 /* If a canonical type already exists for this type, use it. We use
7727 this method instead of type_hash_canon, because it only does a
7728 simple equality check on the list of field members. */
7730 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7733 /* Make sure that we always have the unqualified pointer-to-member
7735 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7737 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7739 t
= make_class_type (RECORD_TYPE
);
7740 xref_basetypes (t
, NULL_TREE
);
7742 /* Let the front end know this is a pointer to member function... */
7743 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7744 /* ... and not really a class type. */
7745 SET_CLASS_TYPE_P (t
, 0);
7747 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7750 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7752 DECL_CHAIN (field
) = fields
;
7755 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7757 /* Zap out the name so that the back end will give us the debugging
7758 information for this anonymous RECORD_TYPE. */
7759 TYPE_NAME (t
) = NULL_TREE
;
7761 /* If this is not the unqualified form of this pointer-to-member
7762 type, set the TYPE_MAIN_VARIANT for this type to be the
7763 unqualified type. Since they are actually RECORD_TYPEs that are
7764 not variants of each other, we must do this manually.
7765 As we just built a new type there is no need to do yet another copy. */
7766 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7768 int type_quals
= cp_type_quals (type
);
7769 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7770 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7771 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7772 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7773 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7774 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7775 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7778 /* Cache this pointer-to-member type so that we can find it again
7780 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7782 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7783 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7784 else if (TYPE_CANONICAL (type
) != type
)
7785 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7790 /* Create and return a pointer to data member type. */
7793 build_ptrmem_type (tree class_type
, tree member_type
)
7795 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7797 cp_cv_quals quals
= type_memfn_quals (member_type
);
7798 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7799 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7803 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7804 return build_offset_type (class_type
, member_type
);
7808 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7809 Check to see that the definition is valid. Issue appropriate error
7810 messages. Return 1 if the definition is particularly bad, or 0
7814 check_static_variable_definition (tree decl
, tree type
)
7816 /* Can't check yet if we don't know the type. */
7817 if (dependent_type_p (type
))
7819 /* If DECL is declared constexpr, we'll do the appropriate checks
7820 in check_initializer. */
7821 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
7823 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7825 if (!COMPLETE_TYPE_P (type
))
7826 error ("in-class initialization of static data member %q#D of "
7827 "incomplete type", decl
);
7828 else if (literal_type_p (type
))
7829 permerror (input_location
,
7830 "%<constexpr%> needed for in-class initialization of "
7831 "static data member %q#D of non-integral type", decl
);
7833 error ("in-class initialization of static data member %q#D of "
7834 "non-literal type", decl
);
7838 /* Motion 10 at San Diego: If a static const integral data member is
7839 initialized with an integral constant expression, the initializer
7840 may appear either in the declaration (within the class), or in
7841 the definition, but not both. If it appears in the class, the
7842 member is a member constant. The file-scope definition is always
7844 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7846 error ("invalid in-class initialization of static data member "
7847 "of non-integral type %qT",
7851 else if (!CP_TYPE_CONST_P (type
))
7852 error ("ISO C++ forbids in-class initialization of non-const "
7853 "static member %qD",
7855 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7856 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7857 "%qD of non-integral type %qT", decl
, type
);
7862 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7863 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7864 expressions out into temporary variables so that walk_tree doesn't
7865 step into them (c++/15764). */
7868 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
7870 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
7871 tree expr
= *expr_p
;
7872 if (TREE_CODE (expr
) == SAVE_EXPR
)
7874 tree op
= TREE_OPERAND (expr
, 0);
7875 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
7876 if (TREE_SIDE_EFFECTS (op
))
7877 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
7880 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
7885 /* Entry point for the above. */
7888 stabilize_vla_size (tree size
)
7890 struct pointer_set_t
*pset
= pointer_set_create ();
7891 /* Break out any function calls into temporary variables. */
7892 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
7895 /* Given the SIZE (i.e., number of elements) in an array, compute an
7896 appropriate index type for the array. If non-NULL, NAME is the
7897 name of the thing being declared. */
7900 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
7905 tree abi_1_itype
= NULL_TREE
;
7907 if (error_operand_p (size
))
7908 return error_mark_node
;
7910 type
= TREE_TYPE (size
);
7911 /* type_dependent_expression_p? */
7912 if (!dependent_type_p (type
))
7914 mark_rvalue_use (size
);
7916 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
7917 && TREE_SIDE_EFFECTS (size
))
7918 /* In C++98, we mark a non-constant array bound with a magic
7919 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7922 size
= fold_non_dependent_expr (size
);
7924 if (CLASS_TYPE_P (type
)
7925 && CLASSTYPE_LITERAL_P (type
))
7927 size
= build_expr_type_conversion (WANT_INT
, size
, true);
7930 if (!(complain
& tf_error
))
7931 return error_mark_node
;
7933 error ("size of array %qD has non-integral type %qT",
7936 error ("size of array has non-integral type %qT", type
);
7937 size
= integer_one_node
;
7939 if (size
== error_mark_node
)
7940 return error_mark_node
;
7941 type
= TREE_TYPE (size
);
7942 /* We didn't support this case in GCC 3.2, so don't bother
7943 trying to model it now in ABI v1. */
7944 abi_1_itype
= error_mark_node
;
7947 size
= maybe_constant_value (size
);
7948 if (!TREE_CONSTANT (size
))
7952 if (error_operand_p (size
))
7953 return error_mark_node
;
7955 /* The array bound must be an integer type. */
7956 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7958 if (!(complain
& tf_error
))
7959 return error_mark_node
;
7961 error ("size of array %qD has non-integral type %qT", name
, type
);
7963 error ("size of array has non-integral type %qT", type
);
7964 size
= integer_one_node
;
7965 type
= TREE_TYPE (size
);
7969 /* A type is dependent if it is...an array type constructed from any
7970 dependent type or whose size is specified by a constant expression
7971 that is value-dependent. */
7972 /* We can only call value_dependent_expression_p on integral constant
7973 expressions; treat non-constant expressions as dependent, too. */
7974 if (processing_template_decl
7975 && (dependent_type_p (type
)
7976 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
7978 /* We cannot do any checking for a SIZE that isn't known to be
7979 constant. Just build the index type and mark that it requires
7980 structural equality checks. */
7981 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7982 size
, integer_one_node
));
7983 TYPE_DEPENDENT_P (itype
) = 1;
7984 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7985 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7989 if (!abi_version_at_least (2) && processing_template_decl
7990 && abi_1_itype
== NULL_TREE
)
7991 /* For abi-1, we handled all instances in templates the same way,
7992 even when they were non-dependent. This affects the manglings
7993 produced. So, we do the normal checking for non-dependent
7994 sizes, but at the end we'll return the same type that abi-1
7995 would have, but with TYPE_CANONICAL set to the "right"
7996 value that the current ABI would provide. */
7997 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7998 osize
, integer_one_node
));
8000 /* Normally, the array-bound will be a constant. */
8001 if (TREE_CODE (size
) == INTEGER_CST
)
8003 /* Check to see if the array bound overflowed. Make that an
8004 error, no matter how generous we're being. */
8005 constant_expression_error (size
);
8007 /* An array must have a positive number of elements. */
8008 if (INT_CST_LT (size
, integer_zero_node
))
8010 if (!(complain
& tf_error
))
8011 return error_mark_node
;
8013 error ("size of array %qD is negative", name
);
8015 error ("size of array is negative");
8016 size
= integer_one_node
;
8018 /* As an extension we allow zero-sized arrays. */
8019 else if (integer_zerop (size
))
8021 if (!(complain
& tf_error
))
8022 /* We must fail if performing argument deduction (as
8023 indicated by the state of complain), so that
8024 another substitution can be found. */
8025 return error_mark_node
;
8026 else if (in_system_header
)
8027 /* Allow them in system headers because glibc uses them. */;
8029 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
8031 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
8034 else if (TREE_CONSTANT (size
)
8035 /* We don't allow VLAs at non-function scopes, or during
8036 tentative template substitution. */
8037 || !at_function_scope_p () || !(complain
& tf_error
))
8039 if (!(complain
& tf_error
))
8040 return error_mark_node
;
8041 /* `(int) &fn' is not a valid array bound. */
8043 error ("size of array %qD is not an integral constant-expression",
8046 error ("size of array is not an integral constant-expression");
8047 size
= integer_one_node
;
8049 else if (pedantic
&& warn_vla
!= 0)
8052 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8054 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8056 else if (warn_vla
> 0)
8060 "variable length array %qD is used", name
);
8063 "variable length array is used");
8066 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8067 /* A variable sized array. */
8068 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8071 HOST_WIDE_INT saved_processing_template_decl
;
8073 /* Compute the index of the largest element in the array. It is
8074 one less than the number of elements in the array. We save
8075 and restore PROCESSING_TEMPLATE_DECL so that computations in
8076 cp_build_binary_op will be appropriately folded. */
8077 saved_processing_template_decl
= processing_template_decl
;
8078 processing_template_decl
= 0;
8079 itype
= cp_build_binary_op (input_location
,
8081 cp_convert (ssizetype
, size
),
8082 cp_convert (ssizetype
, integer_one_node
),
8083 tf_warning_or_error
);
8084 itype
= fold (itype
);
8085 processing_template_decl
= saved_processing_template_decl
;
8087 if (!TREE_CONSTANT (itype
))
8088 /* A variable sized array. */
8089 itype
= variable_size (itype
);
8090 /* Make sure that there was no overflow when creating to a signed
8091 index type. (For example, on a 32-bit machine, an array with
8092 size 2^32 - 1 is too big.) */
8093 else if (TREE_CODE (itype
) == INTEGER_CST
8094 && TREE_OVERFLOW (itype
))
8096 if (!(complain
& tf_error
))
8097 return error_mark_node
;
8098 error ("overflow in array dimension");
8099 TREE_OVERFLOW (itype
) = 0;
8103 /* Create and return the appropriate index type. */
8104 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8106 tree t
= build_index_type (itype
);
8107 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8108 itype
= abi_1_itype
;
8111 itype
= build_index_type (itype
);
8113 /* If the index type were dependent, we would have returned early, so
8114 remember that it isn't. */
8115 TYPE_DEPENDENT_P (itype
) = 0;
8116 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8120 /* Returns the scope (if any) in which the entity declared by
8121 DECLARATOR will be located. If the entity was declared with an
8122 unqualified name, NULL_TREE is returned. */
8125 get_scope_of_declarator (const cp_declarator
*declarator
)
8127 while (declarator
&& declarator
->kind
!= cdk_id
)
8128 declarator
= declarator
->declarator
;
8130 /* If the declarator-id is a SCOPE_REF, the scope in which the
8131 declaration occurs is the first operand. */
8133 && declarator
->u
.id
.qualifying_scope
)
8134 return declarator
->u
.id
.qualifying_scope
;
8136 /* Otherwise, the declarator is not a qualified name; the entity will
8137 be declared in the current scope. */
8141 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8142 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8146 create_array_type_for_decl (tree name
, tree type
, tree size
)
8148 tree itype
= NULL_TREE
;
8150 /* If things have already gone awry, bail now. */
8151 if (type
== error_mark_node
|| size
== error_mark_node
)
8152 return error_mark_node
;
8154 /* 8.3.4/1: If the type of the identifier of D contains the auto
8155 type-specifier, the program is ill-formed. */
8156 if (pedantic
&& type_uses_auto (type
))
8157 pedwarn (input_location
, OPT_pedantic
,
8158 "declaration of %qD as array of %<auto%>", name
);
8160 /* If there are some types which cannot be array elements,
8161 issue an error-message and return. */
8162 switch (TREE_CODE (type
))
8166 error ("declaration of %qD as array of void", name
);
8168 error ("creating array of void");
8169 return error_mark_node
;
8173 error ("declaration of %qD as array of functions", name
);
8175 error ("creating array of functions");
8176 return error_mark_node
;
8178 case REFERENCE_TYPE
:
8180 error ("declaration of %qD as array of references", name
);
8182 error ("creating array of references");
8183 return error_mark_node
;
8187 error ("declaration of %qD as array of function members", name
);
8189 error ("creating array of function members");
8190 return error_mark_node
;
8198 The constant expressions that specify the bounds of the arrays
8199 can be omitted only for the first member of the sequence. */
8200 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8203 error ("declaration of %qD as multidimensional array must "
8204 "have bounds for all dimensions except the first",
8207 error ("multidimensional array must have bounds for all "
8208 "dimensions except the first");
8210 return error_mark_node
;
8213 /* Figure out the index type for the array. */
8215 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8218 T is called the array element type; this type shall not be [...] an
8219 abstract class type. */
8220 abstract_virtuals_error (name
, type
);
8222 return build_cplus_array_type (type
, itype
);
8225 /* Check that it's OK to declare a function with the indicated TYPE.
8226 SFK indicates the kind of special function (if any) that this
8227 function is. OPTYPE is the type given in a conversion operator
8228 declaration, or the class type for a constructor/destructor.
8229 Returns the actual return type of the function; that
8230 may be different than TYPE if an error occurs, or for certain
8231 special functions. */
8234 check_special_function_return_type (special_function_kind sfk
,
8240 case sfk_constructor
:
8242 error ("return type specification for constructor invalid");
8244 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8245 type
= build_pointer_type (optype
);
8247 type
= void_type_node
;
8250 case sfk_destructor
:
8252 error ("return type specification for destructor invalid");
8253 /* We can't use the proper return type here because we run into
8254 problems with ambiguous bases and covariant returns.
8255 Java classes are left unchanged because (void *) isn't a valid
8256 Java type, and we don't want to change the Java ABI. */
8257 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8258 type
= build_pointer_type (void_type_node
);
8260 type
= void_type_node
;
8263 case sfk_conversion
:
8265 error ("return type specified for %<operator %T%>", optype
);
8276 /* A variable or data member (whose unqualified name is IDENTIFIER)
8277 has been declared with the indicated TYPE. If the TYPE is not
8278 acceptable, issue an error message and return a type to use for
8279 error-recovery purposes. */
8282 check_var_type (tree identifier
, tree type
)
8284 if (VOID_TYPE_P (type
))
8287 error ("unnamed variable or field declared void");
8288 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8290 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8291 error ("variable or field %qE declared void", identifier
);
8294 error ("variable or field declared void");
8295 type
= error_mark_node
;
8301 /* Given declspecs and a declarator (abstract or otherwise), determine
8302 the name and type of the object declared and construct a DECL node
8305 DECLSPECS points to the representation of declaration-specifier
8306 sequence that precedes declarator.
8308 DECL_CONTEXT says which syntactic context this declaration is in:
8309 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8310 FUNCDEF for a function definition. Like NORMAL but a few different
8311 error messages in each case. Return value may be zero meaning
8312 this definition is too screwy to try to parse.
8313 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8314 handle member functions (which have FIELD context).
8315 Return value may be zero meaning this definition is too screwy to
8317 PARM for a parameter declaration (either within a function prototype
8318 or before a function body). Make a PARM_DECL, or return void_type_node.
8319 TPARM for a template parameter declaration.
8320 CATCHPARM for a parameter declaration before a catch clause.
8321 TYPENAME if for a typename (in a cast or sizeof).
8322 Don't make a DECL node; just return the ..._TYPE node.
8323 FIELD for a struct or union field; make a FIELD_DECL.
8324 BITFIELD for a field with specified width.
8326 INITIALIZED is as for start_decl.
8328 ATTRLIST is a pointer to the list of attributes, which may be NULL
8329 if there are none; *ATTRLIST may be modified if attributes from inside
8330 the declarator should be applied to the declaration.
8332 When this function is called, scoping variables (such as
8333 CURRENT_CLASS_TYPE) should reflect the scope in which the
8334 declaration occurs, not the scope in which the new declaration will
8335 be placed. For example, on:
8339 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8342 Returns a DECL (if a declarator is present), a TYPE (if there is no
8343 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8347 grokdeclarator (const cp_declarator
*declarator
,
8348 const cp_decl_specifier_seq
*declspecs
,
8349 enum decl_context decl_context
,
8353 tree type
= NULL_TREE
;
8355 int explicit_int128
= 0;
8356 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8357 int explicit_int
= 0;
8358 int explicit_char
= 0;
8359 int defaulted_int
= 0;
8360 tree dependent_name
= NULL_TREE
;
8362 tree typedef_decl
= NULL_TREE
;
8363 const char *name
= NULL
;
8364 tree typedef_type
= NULL_TREE
;
8365 /* True if this declarator is a function definition. */
8366 bool funcdef_flag
= false;
8367 cp_declarator_kind innermost_code
= cdk_error
;
8370 /* See the code below that used this. */
8371 tree decl_attr
= NULL_TREE
;
8374 /* Keep track of what sort of function is being processed
8375 so that we can warn about default return values, or explicit
8376 return values which do not match prescribed defaults. */
8377 special_function_kind sfk
= sfk_none
;
8379 tree dname
= NULL_TREE
;
8380 tree ctor_return_type
= NULL_TREE
;
8381 enum overload_flags flags
= NO_SPECIAL
;
8382 /* cv-qualifiers that apply to the declarator, for a declaration of
8383 a member function. */
8384 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8385 /* virt-specifiers that apply to the declarator, for a declaration of
8386 a member function. */
8387 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8388 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8390 tree raises
= NULL_TREE
;
8391 int template_count
= 0;
8392 tree returned_attrs
= NULL_TREE
;
8393 tree parms
= NULL_TREE
;
8394 const cp_declarator
*id_declarator
;
8395 /* The unqualified name of the declarator; either an
8396 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8397 tree unqualified_id
;
8398 /* The class type, if any, in which this entity is located,
8399 or NULL_TREE if none. Note that this value may be different from
8400 the current class type; for example if an attempt is made to declare
8401 "A::f" inside "B", this value will be "A". */
8402 tree ctype
= current_class_type
;
8403 /* The NAMESPACE_DECL for the namespace in which this entity is
8404 located. If an unqualified name is used to declare the entity,
8405 this value will be NULL_TREE, even if the entity is located at
8407 tree in_namespace
= NULL_TREE
;
8408 cp_storage_class storage_class
;
8409 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8410 bool type_was_error_mark_node
= false;
8411 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8412 bool template_type_arg
= false;
8413 bool template_parm_flag
= false;
8414 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
8417 signed_p
= declspecs
->specs
[(int)ds_signed
];
8418 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
8419 short_p
= declspecs
->specs
[(int)ds_short
];
8420 long_p
= declspecs
->specs
[(int)ds_long
];
8421 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
8422 explicit_int128
= declspecs
->explicit_int128_p
;
8423 thread_p
= declspecs
->specs
[(int)ds_thread
];
8425 if (decl_context
== FUNCDEF
)
8426 funcdef_flag
= true, decl_context
= NORMAL
;
8427 else if (decl_context
== MEMFUNCDEF
)
8428 funcdef_flag
= true, decl_context
= FIELD
;
8429 else if (decl_context
== BITFIELD
)
8430 bitfield
= 1, decl_context
= FIELD
;
8431 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8432 template_type_arg
= true, decl_context
= TYPENAME
;
8433 else if (decl_context
== TPARM
)
8434 template_parm_flag
= true, decl_context
= PARM
;
8436 if (initialized
> 1)
8437 funcdef_flag
= true;
8439 /* Look inside a declarator for the name being declared
8440 and get it as a string, for an error message. */
8441 for (id_declarator
= declarator
;
8443 id_declarator
= id_declarator
->declarator
)
8445 if (id_declarator
->kind
!= cdk_id
)
8446 innermost_code
= id_declarator
->kind
;
8448 switch (id_declarator
->kind
)
8451 if (id_declarator
->declarator
8452 && id_declarator
->declarator
->kind
== cdk_id
)
8454 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8455 if (sfk
== sfk_destructor
)
8462 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8463 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8466 if (qualifying_scope
)
8468 if (at_function_scope_p ())
8472 A declarator-id shall not be qualified except
8475 None of the cases are permitted in block
8477 if (qualifying_scope
== global_namespace
)
8478 error ("invalid use of qualified-name %<::%D%>",
8480 else if (TYPE_P (qualifying_scope
))
8481 error ("invalid use of qualified-name %<%T::%D%>",
8482 qualifying_scope
, decl
);
8484 error ("invalid use of qualified-name %<%D::%D%>",
8485 qualifying_scope
, decl
);
8486 return error_mark_node
;
8488 else if (TYPE_P (qualifying_scope
))
8490 ctype
= qualifying_scope
;
8491 if (!MAYBE_CLASS_TYPE_P (ctype
))
8493 error ("%q#T is not a class or a namespace", ctype
);
8496 else if (innermost_code
!= cdk_function
8497 && current_class_type
8498 && !UNIQUELY_DERIVED_FROM_P (ctype
,
8499 current_class_type
))
8501 error ("type %qT is not derived from type %qT",
8502 ctype
, current_class_type
);
8503 return error_mark_node
;
8506 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8507 in_namespace
= qualifying_scope
;
8509 switch (TREE_CODE (decl
))
8515 if (innermost_code
!= cdk_function
)
8517 error ("declaration of %qD as non-function", decl
);
8518 return error_mark_node
;
8520 else if (!qualifying_scope
8521 && !(current_class_type
&& at_class_scope_p ()))
8523 error ("declaration of %qD as non-member", decl
);
8524 return error_mark_node
;
8527 type
= TREE_OPERAND (decl
, 0);
8529 type
= constructor_name (type
);
8530 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8535 case TEMPLATE_ID_EXPR
:
8537 tree fns
= TREE_OPERAND (decl
, 0);
8540 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8542 gcc_assert (is_overloaded_fn (dname
));
8543 dname
= DECL_NAME (get_first_fn (dname
));
8548 case IDENTIFIER_NODE
:
8549 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8552 if (C_IS_RESERVED_WORD (dname
))
8554 error ("declarator-id missing; using reserved word %qD",
8556 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8558 else if (!IDENTIFIER_TYPENAME_P (dname
))
8559 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8562 gcc_assert (flags
== NO_SPECIAL
);
8563 flags
= TYPENAME_FLAG
;
8564 ctor_return_type
= TREE_TYPE (dname
);
8565 sfk
= sfk_conversion
;
8566 if (is_typename_at_global_scope (dname
))
8567 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8569 name
= "<invalid operator>";
8586 return error_mark_node
;
8591 if (id_declarator
->kind
== cdk_id
)
8597 The declarator in a function-definition shall have the form
8598 D1 ( parameter-declaration-clause) ... */
8599 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8601 error ("function definition does not declare parameters");
8602 return error_mark_node
;
8605 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8606 && innermost_code
!= cdk_function
8607 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8609 error ("declaration of %qD as non-function", dname
);
8610 return error_mark_node
;
8614 && TREE_CODE (dname
) == IDENTIFIER_NODE
8615 && UDLIT_OPER_P (dname
)
8616 && innermost_code
!= cdk_function
)
8618 error ("declaration of %qD as non-function", dname
);
8619 return error_mark_node
;
8622 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8624 if (declspecs
->specs
[(int)ds_typedef
])
8626 error ("declaration of %qD as %<typedef%>", dname
);
8627 return error_mark_node
;
8629 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8631 error ("declaration of %qD as parameter", dname
);
8632 return error_mark_node
;
8636 /* Anything declared one level down from the top level
8637 must be one of the parameters of a function
8638 (because the body is at least two levels down). */
8640 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8641 by not allowing C++ class definitions to specify their parameters
8642 with xdecls (must be spec.d in the parmlist).
8644 Since we now wait to push a class scope until we are sure that
8645 we are in a legitimate method context, we must set oldcname
8646 explicitly (since current_class_name is not yet alive).
8648 We also want to avoid calling this a PARM if it is in a namespace. */
8650 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8652 cp_binding_level
*b
= current_binding_level
;
8653 current_binding_level
= b
->level_chain
;
8654 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8655 decl_context
= PARM
;
8656 current_binding_level
= b
;
8660 name
= decl_context
== PARM
? "parameter" : "type name";
8662 if (constexpr_p
&& declspecs
->specs
[(int)ds_typedef
])
8664 error ("%<constexpr%> cannot appear in a typedef declaration");
8665 return error_mark_node
;
8668 /* If there were multiple types specified in the decl-specifier-seq,
8669 issue an error message. */
8670 if (declspecs
->multiple_types_p
)
8672 error ("two or more data types in declaration of %qs", name
);
8673 return error_mark_node
;
8676 if (declspecs
->conflicting_specifiers_p
)
8678 error ("conflicting specifiers in declaration of %qs", name
);
8679 return error_mark_node
;
8682 /* Extract the basic type from the decl-specifier-seq. */
8683 type
= declspecs
->type
;
8684 if (type
== error_mark_node
)
8687 type_was_error_mark_node
= true;
8689 /* If the entire declaration is itself tagged as deprecated then
8690 suppress reports of deprecated items. */
8691 if (type
&& TREE_DEPRECATED (type
)
8692 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8693 warn_deprecated_use (type
, NULL_TREE
);
8694 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8696 typedef_decl
= type
;
8697 type
= TREE_TYPE (typedef_decl
);
8698 if (TREE_DEPRECATED (type
)
8699 && DECL_ARTIFICIAL (typedef_decl
)
8700 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8701 warn_deprecated_use (type
, NULL_TREE
);
8703 /* No type at all: default to `int', and set DEFAULTED_INT
8704 because it was not a user-defined typedef. */
8705 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8707 /* These imply 'int'. */
8708 type
= integer_type_node
;
8712 explicit_int
= declspecs
->explicit_int_p
;
8713 explicit_char
= declspecs
->explicit_char_p
;
8716 /* See the code below that used this. */
8718 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8720 typedef_type
= type
;
8723 if (sfk
!= sfk_conversion
)
8724 ctor_return_type
= ctype
;
8726 if (sfk
!= sfk_none
)
8727 type
= check_special_function_return_type (sfk
, type
,
8729 else if (type
== NULL_TREE
)
8735 /* We handle `main' specially here, because 'main () { }' is so
8736 common. With no options, it is allowed. With -Wreturn-type,
8737 it is a warning. It is only an error with -pedantic-errors. */
8738 is_main
= (funcdef_flag
8739 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8740 && MAIN_NAME_P (dname
)
8741 && ctype
== NULL_TREE
8742 && in_namespace
== NULL_TREE
8743 && current_namespace
== global_namespace
);
8745 if (type_was_error_mark_node
)
8746 /* We've already issued an error, don't complain more. */;
8747 else if (in_system_header
|| flag_ms_extensions
)
8748 /* Allow it, sigh. */;
8750 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8752 pedwarn (input_location
, OPT_pedantic
,
8753 "ISO C++ forbids declaration of %qs with no type", name
);
8755 warning (OPT_Wreturn_type
,
8756 "ISO C++ forbids declaration of %qs with no type", name
);
8758 type
= integer_type_node
;
8763 if (explicit_int128
)
8765 if (int128_integer_type_node
== NULL_TREE
)
8767 error ("%<__int128%> is not supported by this target");
8768 explicit_int128
= false;
8770 else if (pedantic
&& ! in_system_header
)
8771 pedwarn (input_location
, OPT_pedantic
,
8772 "ISO C++ does not support %<__int128%> for %qs", name
);
8775 /* Now process the modifiers that were specified
8776 and check for invalid combinations. */
8778 /* Long double is a special combination. */
8779 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8782 type
= cp_build_qualified_type (long_double_type_node
,
8783 cp_type_quals (type
));
8786 /* Check all other uses of type modifiers. */
8788 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8792 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8793 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8794 else if (signed_p
&& unsigned_p
)
8795 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8796 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8797 error ("%<long long%> invalid for %qs", name
);
8798 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8799 error ("%<long%> invalid for %qs", name
);
8800 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8801 error ("%<short%> invalid for %qs", name
);
8802 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8803 error ("%<long%> or %<short%> invalid for %qs", name
);
8804 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8805 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8806 else if ((long_p
|| short_p
) && explicit_char
)
8807 error ("%<long%> or %<short%> specified with char for %qs", name
);
8808 else if (long_p
&& short_p
)
8809 error ("%<long%> and %<short%> specified together for %qs", name
);
8810 else if (type
== char16_type_node
|| type
== char32_type_node
)
8812 if (signed_p
|| unsigned_p
)
8813 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8814 else if (short_p
|| long_p
)
8815 error ("%<short%> or %<long%> invalid for %qs", name
);
8820 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8822 pedwarn (input_location
, OPT_pedantic
,
8823 "long, short, signed or unsigned used invalidly for %qs",
8825 if (flag_pedantic_errors
)
8830 /* Discard the type modifiers if they are invalid. */
8841 /* Decide whether an integer type is signed or not.
8842 Optionally treat bitfields as signed by default. */
8846 It is implementation-defined whether a plain (neither
8847 explicitly signed or unsigned) char, short, int, or long
8848 bit-field is signed or unsigned.
8850 Naturally, we extend this to long long as well. Note that
8851 this does not include wchar_t. */
8852 || (bitfield
&& !flag_signed_bitfields
8854 /* A typedef for plain `int' without `signed' can be
8855 controlled just like plain `int', but a typedef for
8856 `signed int' cannot be so controlled. */
8858 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8859 && TREE_CODE (type
) == INTEGER_TYPE
8860 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8862 if (explicit_int128
)
8863 type
= int128_unsigned_type_node
;
8865 type
= long_long_unsigned_type_node
;
8867 type
= long_unsigned_type_node
;
8869 type
= short_unsigned_type_node
;
8870 else if (type
== char_type_node
)
8871 type
= unsigned_char_type_node
;
8872 else if (typedef_decl
)
8873 type
= unsigned_type_for (type
);
8875 type
= unsigned_type_node
;
8877 else if (signed_p
&& type
== char_type_node
)
8878 type
= signed_char_type_node
;
8879 else if (explicit_int128
)
8880 type
= int128_integer_type_node
;
8882 type
= long_long_integer_type_node
;
8884 type
= long_integer_type_node
;
8886 type
= short_integer_type_node
;
8888 if (declspecs
->specs
[(int)ds_complex
])
8890 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8891 error ("complex invalid for %qs", name
);
8892 /* If we just have "complex", it is equivalent to
8893 "complex double", but if any modifiers at all are specified it is
8894 the complex form of TYPE. E.g, "complex short" is
8895 "complex short int". */
8896 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8897 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8898 type
= complex_double_type_node
;
8899 else if (type
== integer_type_node
)
8900 type
= complex_integer_type_node
;
8901 else if (type
== float_type_node
)
8902 type
= complex_float_type_node
;
8903 else if (type
== double_type_node
)
8904 type
= complex_double_type_node
;
8905 else if (type
== long_double_type_node
)
8906 type
= complex_long_double_type_node
;
8908 type
= build_complex_type (type
);
8911 type_quals
= TYPE_UNQUALIFIED
;
8912 if (declspecs
->specs
[(int)ds_const
])
8913 type_quals
|= TYPE_QUAL_CONST
;
8914 if (declspecs
->specs
[(int)ds_volatile
])
8915 type_quals
|= TYPE_QUAL_VOLATILE
;
8916 if (declspecs
->specs
[(int)ds_restrict
])
8917 type_quals
|= TYPE_QUAL_RESTRICT
;
8918 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8919 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8922 type_quals
|= cp_type_quals (type
);
8923 type
= cp_build_qualified_type_real
8924 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8925 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8926 /* We might have ignored or rejected some of the qualifiers. */
8927 type_quals
= cp_type_quals (type
);
8930 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8931 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8932 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8934 storage_class
= declspecs
->storage_class
;
8935 if (storage_class
== sc_static
)
8936 staticp
= 1 + (decl_context
== FIELD
);
8938 if (virtualp
&& staticp
== 2)
8940 error ("member %qD cannot be declared both virtual and static", dname
);
8941 storage_class
= sc_none
;
8944 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8946 if (dependent_name
&& !friendp
)
8948 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8949 return error_mark_node
;
8952 /* Issue errors about use of storage classes for parameters. */
8953 if (decl_context
== PARM
)
8955 if (declspecs
->specs
[(int)ds_typedef
])
8957 error ("typedef declaration invalid in parameter declaration");
8958 return error_mark_node
;
8960 else if (template_parm_flag
&& storage_class
!= sc_none
)
8962 error ("storage class specified for template parameter %qs", name
);
8963 return error_mark_node
;
8965 else if (storage_class
== sc_static
8966 || storage_class
== sc_extern
8968 error ("storage class specifiers invalid in parameter declarations");
8970 /* Function parameters cannot be constexpr. If we saw one, moan
8971 and pretend it wasn't there. */
8974 error ("a parameter cannot be declared %<constexpr%>");
8979 /* Give error if `virtual' is used outside of class declaration. */
8981 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8983 error ("%<virtual%> outside class declaration");
8987 /* Static anonymous unions are dealt with here. */
8988 if (staticp
&& decl_context
== TYPENAME
8990 && ANON_AGGR_TYPE_P (declspecs
->type
))
8991 decl_context
= FIELD
;
8993 /* Warn about storage classes that are invalid for certain
8994 kinds of declarations (parameters, typenames, etc.). */
8997 && storage_class
!= sc_extern
8998 && storage_class
!= sc_static
)
8999 || declspecs
->specs
[(int)ds_typedef
]))
9001 error ("multiple storage classes in declaration of %qs", name
);
9004 if (decl_context
!= NORMAL
9005 && ((storage_class
!= sc_none
9006 && storage_class
!= sc_mutable
)
9009 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9010 && (storage_class
== sc_register
9011 || storage_class
== sc_auto
))
9013 else if (declspecs
->specs
[(int)ds_typedef
])
9015 else if (decl_context
== FIELD
9016 /* C++ allows static class elements. */
9017 && storage_class
== sc_static
)
9018 /* C++ also allows inlines and signed and unsigned elements,
9019 but in those cases we don't come in here. */
9023 if (decl_context
== FIELD
)
9024 error ("storage class specified for %qs", name
);
9027 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9028 error ("storage class specified for parameter %qs", name
);
9030 error ("storage class specified for typename");
9032 if (storage_class
== sc_register
9033 || storage_class
== sc_auto
9034 || storage_class
== sc_extern
9036 storage_class
= sc_none
;
9039 else if (storage_class
== sc_extern
&& funcdef_flag
9040 && ! toplevel_bindings_p ())
9041 error ("nested function %qs declared %<extern%>", name
);
9042 else if (toplevel_bindings_p ())
9044 if (storage_class
== sc_auto
)
9045 error ("top-level declaration of %qs specifies %<auto%>", name
);
9048 && storage_class
!= sc_extern
9049 && storage_class
!= sc_static
)
9051 error ("function-scope %qs implicitly auto and declared %<__thread%>",
9056 if (storage_class
&& friendp
)
9058 error ("storage class specifiers invalid in friend function declarations");
9059 storage_class
= sc_none
;
9064 unqualified_id
= NULL_TREE
;
9067 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9068 switch (TREE_CODE (unqualified_id
))
9071 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9072 if (TYPE_P (unqualified_id
))
9073 unqualified_id
= constructor_name (unqualified_id
);
9076 case IDENTIFIER_NODE
:
9077 case TEMPLATE_ID_EXPR
:
9085 /* Determine the type of the entity declared by recurring on the
9087 for (; declarator
; declarator
= declarator
->declarator
)
9089 const cp_declarator
*inner_declarator
;
9092 if (type
== error_mark_node
)
9093 return error_mark_node
;
9095 attrs
= declarator
->attributes
;
9101 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9102 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9103 if (declarator
->kind
== cdk_function
)
9104 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9105 if (declarator
->kind
== cdk_array
)
9106 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9107 returned_attrs
= decl_attributes (&type
,
9108 chainon (returned_attrs
, attrs
),
9112 if (declarator
->kind
== cdk_id
)
9115 inner_declarator
= declarator
->declarator
;
9117 switch (declarator
->kind
)
9120 type
= create_array_type_for_decl (dname
, type
,
9121 declarator
->u
.array
.bounds
);
9129 /* Declaring a function type.
9130 Make sure we have a valid type for the function to return. */
9132 if (type_quals
!= TYPE_UNQUALIFIED
)
9134 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9135 warning (OPT_Wignored_qualifiers
,
9136 "type qualifiers ignored on function return type");
9137 /* We now know that the TYPE_QUALS don't apply to the
9138 decl, but to its return type. */
9139 type_quals
= TYPE_UNQUALIFIED
;
9141 errmsg
= targetm
.invalid_return_type (type
);
9145 type
= integer_type_node
;
9148 /* Error about some types functions can't return. */
9150 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9152 error ("%qs declared as function returning a function", name
);
9153 return error_mark_node
;
9155 if (TREE_CODE (type
) == ARRAY_TYPE
)
9157 error ("%qs declared as function returning an array", name
);
9158 return error_mark_node
;
9161 /* Pick up type qualifiers which should be applied to `this'. */
9162 memfn_quals
= declarator
->u
.function
.qualifiers
;
9163 /* Pick up virt-specifiers. */
9164 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9165 /* Pick up the exception specifications. */
9166 raises
= declarator
->u
.function
.exception_specification
;
9167 /* If the exception-specification is ill-formed, let's pretend
9168 there wasn't one. */
9169 if (raises
== error_mark_node
)
9172 /* Say it's a definition only for the CALL_EXPR
9173 closest to the identifier. */
9174 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9176 /* Handle a late-specified return type. */
9179 if (type_uses_auto (type
))
9181 if (!declarator
->u
.function
.late_return_type
)
9183 error ("%qs function uses %<auto%> type specifier without"
9184 " trailing return type", name
);
9185 return error_mark_node
;
9187 else if (!is_auto (type
))
9189 error ("%qs function with trailing return type has"
9190 " %qT as its type rather than plain %<auto%>",
9192 return error_mark_node
;
9195 else if (declarator
->u
.function
.late_return_type
)
9197 if (cxx_dialect
< cxx0x
)
9198 /* Not using maybe_warn_cpp0x because this should
9199 always be an error. */
9200 error ("trailing return type only available with "
9201 "-std=c++11 or -std=gnu++11");
9203 error ("%qs function with trailing return type not "
9204 "declared with %<auto%> type specifier", name
);
9205 return error_mark_node
;
9208 type
= splice_late_return_type
9209 (type
, declarator
->u
.function
.late_return_type
);
9210 if (type
== error_mark_node
)
9211 return error_mark_node
;
9213 if (ctype
== NULL_TREE
9214 && decl_context
== FIELD
9216 && (friendp
== 0 || dname
== current_class_name
))
9217 ctype
= current_class_type
;
9219 if (ctype
&& (sfk
== sfk_constructor
9220 || sfk
== sfk_destructor
))
9222 /* We are within a class's scope. If our declarator name
9223 is the same as the class name, and we are defining
9224 a function, then it is a constructor/destructor, and
9225 therefore returns a void type. */
9227 /* ISO C++ 12.4/2. A destructor may not be declared
9228 const or volatile. A destructor may not be
9231 ISO C++ 12.1. A constructor may not be declared
9232 const or volatile. A constructor may not be
9233 virtual. A constructor may not be static. */
9235 error ((flags
== DTOR_FLAG
)
9236 ? G_("destructor cannot be static member function")
9237 : G_("constructor cannot be static member function"));
9240 error ((flags
== DTOR_FLAG
)
9241 ? G_("destructors may not be cv-qualified")
9242 : G_("constructors may not be cv-qualified"));
9243 memfn_quals
= TYPE_UNQUALIFIED
;
9246 if (decl_context
== FIELD
9247 && !member_function_or_else (ctype
,
9250 return error_mark_node
;
9252 if (flags
!= DTOR_FLAG
)
9254 /* It's a constructor. */
9259 permerror (input_location
, "constructors cannot be declared virtual");
9262 if (decl_context
== FIELD
9263 && sfk
!= sfk_constructor
)
9264 return error_mark_node
;
9266 if (decl_context
== FIELD
)
9272 error ("can%'t initialize friend function %qs", name
);
9275 /* Cannot be both friend and virtual. */
9276 error ("virtual functions cannot be friends");
9279 if (decl_context
== NORMAL
)
9280 error ("friend declaration not in class definition");
9281 if (current_function_decl
&& funcdef_flag
)
9282 error ("can%'t define friend function %qs in a local "
9286 else if (ctype
&& sfk
== sfk_conversion
)
9290 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9295 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9298 if (inner_declarator
9299 && inner_declarator
->kind
== cdk_id
9300 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9301 && arg_types
!= void_list_node
)
9303 error ("destructors may not have parameters");
9304 arg_types
= void_list_node
;
9308 type
= build_function_type (type
, arg_types
);
9315 /* Filter out pointers-to-references and references-to-references.
9316 We can get these if a TYPE_DECL is used. */
9318 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9320 if (declarator
->kind
!= cdk_reference
)
9322 error ("cannot declare pointer to %q#T", type
);
9323 type
= TREE_TYPE (type
);
9326 /* In C++0x, we allow reference to reference declarations
9327 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9328 and template type arguments [14.3.1/4 temp.arg.type]. The
9329 check for direct reference to reference declarations, which
9330 are still forbidden, occurs below. Reasoning behind the change
9331 can be found in DR106, DR540, and the rvalue reference
9333 else if (cxx_dialect
== cxx98
)
9335 error ("cannot declare reference to %q#T", type
);
9336 type
= TREE_TYPE (type
);
9339 else if (VOID_TYPE_P (type
))
9341 if (declarator
->kind
== cdk_reference
)
9342 error ("cannot declare reference to %q#T", type
);
9343 else if (declarator
->kind
== cdk_ptrmem
)
9344 error ("cannot declare pointer to %q#T member", type
);
9347 /* We now know that the TYPE_QUALS don't apply to the decl,
9348 but to the target of the pointer. */
9349 type_quals
= TYPE_UNQUALIFIED
;
9351 if (declarator
->kind
== cdk_ptrmem
9352 && (TREE_CODE (type
) == FUNCTION_TYPE
9353 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9355 memfn_quals
|= type_memfn_quals (type
);
9356 type
= build_memfn_type (type
,
9357 declarator
->u
.pointer
.class_type
,
9359 if (type
== error_mark_node
)
9360 return error_mark_node
;
9361 memfn_quals
= TYPE_UNQUALIFIED
;
9364 if (TREE_CODE (type
) == FUNCTION_TYPE
9365 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9366 error (declarator
->kind
== cdk_reference
9367 ? G_("cannot declare reference to qualified function type %qT")
9368 : G_("cannot declare pointer to qualified function type %qT"),
9371 /* When the pointed-to type involves components of variable size,
9372 care must be taken to ensure that the size evaluation code is
9373 emitted early enough to dominate all the possible later uses
9374 and late enough for the variables on which it depends to have
9377 This is expected to happen automatically when the pointed-to
9378 type has a name/declaration of it's own, but special attention
9379 is required if the type is anonymous.
9381 We handle the NORMAL and FIELD contexts here by inserting a
9382 dummy statement that just evaluates the size at a safe point
9383 and ensures it is not deferred until e.g. within a deeper
9384 conditional context (c++/43555).
9386 We expect nothing to be needed here for PARM or TYPENAME.
9387 Evaluating the size at this point for TYPENAME would
9388 actually be incorrect, as we might be in the middle of an
9389 expression with side effects on the pointed-to type size
9390 "arguments" prior to the pointer declaration point and the
9391 size evaluation could end up prior to the side effects. */
9393 if (!TYPE_NAME (type
)
9394 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9395 && at_function_scope_p ()
9396 && variably_modified_type_p (type
, NULL_TREE
))
9398 /* First break out any side-effects. */
9399 stabilize_vla_size (TYPE_SIZE (type
));
9400 /* And then force evaluation of the SAVE_EXPR. */
9401 finish_expr_stmt (TYPE_SIZE (type
));
9404 if (declarator
->kind
== cdk_reference
)
9406 /* In C++0x, the type we are creating a reference to might be
9407 a typedef which is itself a reference type. In that case,
9408 we follow the reference collapsing rules in
9409 [7.1.3/8 dcl.typedef] to create the final reference type:
9411 "If a typedef TD names a type that is a reference to a type
9412 T, an attempt to create the type 'lvalue reference to cv TD'
9413 creates the type 'lvalue reference to T,' while an attempt
9414 to create the type "rvalue reference to cv TD' creates the
9417 if (VOID_TYPE_P (type
))
9418 /* We already gave an error. */;
9419 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9421 if (declarator
->u
.reference
.rvalue_ref
)
9422 /* Leave type alone. */;
9424 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9427 type
= cp_build_reference_type
9428 (type
, declarator
->u
.reference
.rvalue_ref
);
9430 /* In C++0x, we need this check for direct reference to
9431 reference declarations, which are forbidden by
9432 [8.3.2/5 dcl.ref]. Reference to reference declarations
9433 are only allowed indirectly through typedefs and template
9434 type arguments. Example:
9436 void foo(int & &); // invalid ref-to-ref decl
9438 typedef int & int_ref;
9439 void foo(int_ref &); // valid ref-to-ref decl
9441 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9442 error ("cannot declare reference to %q#T, which is not "
9443 "a typedef or a template type argument", type
);
9445 else if (TREE_CODE (type
) == METHOD_TYPE
)
9446 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9447 else if (declarator
->kind
== cdk_ptrmem
)
9449 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9451 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9452 /* We will already have complained. */
9453 type
= error_mark_node
;
9455 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9459 type
= build_pointer_type (type
);
9461 /* Process a list of type modifier keywords (such as
9462 const or volatile) that were given inside the `*' or `&'. */
9464 if (declarator
->u
.pointer
.qualifiers
)
9467 = cp_build_qualified_type (type
,
9468 declarator
->u
.pointer
.qualifiers
);
9469 type_quals
= cp_type_quals (type
);
9482 /* We need to stabilize side-effects in VLA sizes for regular array
9483 declarations too, not just pointers to arrays. */
9484 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9485 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9486 && at_function_scope_p ()
9487 && variably_modified_type_p (type
, NULL_TREE
))
9488 stabilize_vla_size (TYPE_SIZE (type
));
9490 /* A `constexpr' specifier used in an object declaration declares
9491 the object as `const'. */
9492 if (constexpr_p
&& innermost_code
!= cdk_function
)
9494 if (type_quals
& TYPE_QUAL_CONST
)
9495 error ("both %<const%> and %<constexpr%> cannot be used here");
9496 if (type_quals
& TYPE_QUAL_VOLATILE
)
9497 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9498 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9500 type_quals
|= TYPE_QUAL_CONST
;
9501 type
= cp_build_qualified_type (type
, type_quals
);
9505 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9506 && TREE_CODE (type
) != FUNCTION_TYPE
9507 && TREE_CODE (type
) != METHOD_TYPE
)
9509 error ("template-id %qD used as a declarator",
9511 unqualified_id
= dname
;
9514 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9515 qualified with a class-name, turn it into a METHOD_TYPE, unless
9516 we know that the function is static. We take advantage of this
9517 opportunity to do other processing that pertains to entities
9518 explicitly declared to be class members. Note that if DECLARATOR
9519 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9520 would not have exited the loop above. */
9522 && declarator
->u
.id
.qualifying_scope
9523 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9527 ctype
= declarator
->u
.id
.qualifying_scope
;
9528 ctype
= TYPE_MAIN_VARIANT (ctype
);
9530 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
9532 /* You're supposed to have one `template <...>' for every
9533 template class, but you don't need one for a full
9534 specialization. For example:
9536 template <class T> struct S{};
9537 template <> struct S<int> { void f(); };
9538 void S<int>::f () {}
9540 is correct; there shouldn't be a `template <>' for the
9541 definition of `S<int>::f'. */
9542 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
9543 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
9544 /* T is an explicit (not partial) specialization. All
9545 containing classes must therefore also be explicitly
9548 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
9549 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
9550 template_count
+= 1;
9552 t
= TYPE_MAIN_DECL (t
);
9553 t
= DECL_CONTEXT (t
);
9556 if (ctype
== current_class_type
)
9560 permerror (input_location
, "member functions are implicitly friends of their class");
9564 permerror (declarator
->id_loc
,
9565 "extra qualification %<%T::%> on member %qs",
9568 else if (/* If the qualifying type is already complete, then we
9569 can skip the following checks. */
9570 !COMPLETE_TYPE_P (ctype
)
9571 && (/* If the function is being defined, then
9572 qualifying type must certainly be complete. */
9574 /* A friend declaration of "T::f" is OK, even if
9575 "T" is a template parameter. But, if this
9576 function is not a friend, the qualifying type
9578 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9579 /* For a declaration, the type need not be
9580 complete, if either it is dependent (since there
9581 is no meaningful definition of complete in that
9582 case) or the qualifying class is currently being
9584 || !(dependent_type_p (ctype
)
9585 || currently_open_class (ctype
)))
9586 /* Check that the qualifying type is complete. */
9587 && !complete_type_or_else (ctype
, NULL_TREE
))
9588 return error_mark_node
;
9589 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9591 if (current_class_type
9592 && (!friendp
|| funcdef_flag
))
9595 ? G_("cannot define member function %<%T::%s%> "
9597 : G_("cannot declare member function %<%T::%s%> "
9599 ctype
, name
, current_class_type
);
9600 return error_mark_node
;
9603 else if (declspecs
->specs
[(int)ds_typedef
]
9604 && current_class_type
)
9606 error ("cannot declare member %<%T::%s%> within %qT",
9607 ctype
, name
, current_class_type
);
9608 return error_mark_node
;
9612 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9613 ctype
= current_class_type
;
9615 /* Now TYPE has the actual type. */
9620 *attrlist
= chainon (returned_attrs
, *attrlist
);
9622 attrlist
= &returned_attrs
;
9625 /* Handle parameter packs. */
9626 if (parameter_pack_p
)
9628 if (decl_context
== PARM
)
9629 /* Turn the type into a pack expansion.*/
9630 type
= make_pack_expansion (type
);
9632 error ("non-parameter %qs cannot be a parameter pack", name
);
9635 /* Did array size calculations overflow? */
9637 if (TREE_CODE (type
) == ARRAY_TYPE
9638 && COMPLETE_TYPE_P (type
)
9639 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9640 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
9642 error ("size of array %qs is too large", name
);
9643 /* If we proceed with the array type as it is, we'll eventually
9644 crash in tree_low_cst(). */
9645 type
= error_mark_node
;
9648 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9649 && !processing_template_decl
9650 && variably_modified_type_p (type
, NULL_TREE
))
9652 if (decl_context
== FIELD
)
9653 error ("data member may not have variably modified type %qT", type
);
9655 error ("parameter may not have variably modified type %qT", type
);
9656 type
= error_mark_node
;
9659 if (explicitp
== 1 || (explicitp
&& friendp
))
9661 /* [dcl.fct.spec] The explicit specifier shall only be used in
9662 declarations of constructors within a class definition. */
9663 error ("only declarations of constructors can be %<explicit%>");
9667 if (storage_class
== sc_mutable
)
9669 if (decl_context
!= FIELD
|| friendp
)
9671 error ("non-member %qs cannot be declared %<mutable%>", name
);
9672 storage_class
= sc_none
;
9674 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9676 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9677 storage_class
= sc_none
;
9679 else if (TREE_CODE (type
) == FUNCTION_TYPE
9680 || TREE_CODE (type
) == METHOD_TYPE
)
9682 error ("function %qs cannot be declared %<mutable%>", name
);
9683 storage_class
= sc_none
;
9687 error ("static %qs cannot be declared %<mutable%>", name
);
9688 storage_class
= sc_none
;
9690 else if (type_quals
& TYPE_QUAL_CONST
)
9692 error ("const %qs cannot be declared %<mutable%>", name
);
9693 storage_class
= sc_none
;
9695 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9697 permerror (input_location
, "reference %qs cannot be declared "
9698 "%<mutable%>", name
);
9699 storage_class
= sc_none
;
9703 /* If this is declaring a typedef name, return a TYPE_DECL. */
9704 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9708 /* Note that the grammar rejects storage classes
9709 in typenames, fields or parameters. */
9710 if (current_lang_name
== lang_name_java
)
9711 TYPE_FOR_JAVA (type
) = 1;
9713 /* This declaration:
9715 typedef void f(int) const;
9717 declares a function type which is not a member of any
9718 particular class, but which is cv-qualified; for
9719 example "f S::*" declares a pointer to a const-qualified
9720 member function of S. We record the cv-qualification in the
9722 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9724 type
= apply_memfn_quals (type
, memfn_quals
);
9726 /* We have now dealt with these qualifiers. */
9727 memfn_quals
= TYPE_UNQUALIFIED
;
9730 if (type_uses_auto (type
))
9732 error ("typedef declared %<auto%>");
9733 type
= error_mark_node
;
9736 if (decl_context
== FIELD
)
9737 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9739 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9740 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9741 error_at (DECL_SOURCE_LOCATION (decl
),
9742 "typedef name may not be a nested-name-specifier");
9743 TREE_TYPE (decl
) = error_mark_node
;
9746 if (decl_context
!= FIELD
)
9748 if (!current_function_decl
)
9749 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9750 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9751 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9752 (current_function_decl
)))
9753 /* The TYPE_DECL is "abstract" because there will be
9754 clones of this constructor/destructor, and there will
9755 be copies of this TYPE_DECL generated in those
9757 DECL_ABSTRACT (decl
) = 1;
9759 else if (constructor_name_p (unqualified_id
, current_class_type
))
9760 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9761 "as enclosing class",
9764 /* If the user declares "typedef struct {...} foo" then the
9765 struct will have an anonymous name. Fill that name in now.
9766 Nothing can refer to it, so nothing needs know about the name
9768 if (type
!= error_mark_node
9771 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9772 && TYPE_ANONYMOUS_P (type
)
9773 && declspecs
->type_definition_p
9774 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9778 /* Replace the anonymous name with the real name everywhere. */
9779 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9781 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9782 /* We do not rename the debug info representing the
9783 anonymous tagged type because the standard says in
9784 [dcl.typedef] that the naming applies only for
9785 linkage purposes. */
9786 /*debug_hooks->set_name (t, decl);*/
9787 TYPE_NAME (t
) = decl
;
9790 if (TYPE_LANG_SPECIFIC (type
))
9791 TYPE_WAS_ANONYMOUS (type
) = 1;
9793 /* If this is a typedef within a template class, the nested
9794 type is a (non-primary) template. The name for the
9795 template needs updating as well. */
9796 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9797 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9798 = TYPE_IDENTIFIER (type
);
9800 /* Adjust linkage now that we aren't anonymous anymore. */
9801 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9802 determine_visibility (TYPE_MAIN_DECL (type
));
9804 /* FIXME remangle member functions; member functions of a
9805 type with external linkage have external linkage. */
9809 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9810 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9812 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
9813 memfn_quals
!= TYPE_UNQUALIFIED
,
9814 inlinep
, friendp
, raises
!= NULL_TREE
);
9816 if (declspecs
->specs
[(int)ds_alias
])
9817 /* Acknowledge that this was written:
9818 `using analias = atype;'. */
9819 TYPE_DECL_ALIAS_P (decl
) = 1;
9824 /* Detect the case of an array type of unspecified size
9825 which came, as such, direct from a typedef name.
9826 We must copy the type, so that the array's domain can be
9827 individually set by the object's initializer. */
9829 if (type
&& typedef_type
9830 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9831 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9832 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9834 /* Detect where we're using a typedef of function type to declare a
9835 function. PARMS will not be set, so we must create it now. */
9837 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9839 tree decls
= NULL_TREE
;
9842 for (args
= TYPE_ARG_TYPES (type
);
9843 args
&& args
!= void_list_node
;
9844 args
= TREE_CHAIN (args
))
9846 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9848 DECL_CHAIN (decl
) = decls
;
9852 parms
= nreverse (decls
);
9854 if (decl_context
!= TYPENAME
)
9856 /* A cv-qualifier-seq shall only be part of the function type
9857 for a non-static member function. [8.3.5/4 dcl.fct] */
9858 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9859 && (current_class_type
== NULL_TREE
|| staticp
) )
9862 ? G_("qualified function types cannot be used to "
9863 "declare static member functions")
9864 : G_("qualified function types cannot be used to "
9865 "declare free functions"));
9866 type
= TYPE_MAIN_VARIANT (type
);
9869 /* The qualifiers on the function type become the qualifiers on
9870 the non-static member function. */
9871 memfn_quals
|= type_memfn_quals (type
);
9872 type_quals
= TYPE_UNQUALIFIED
;
9876 /* If this is a type name (such as, in a cast or sizeof),
9877 compute the type and return it now. */
9879 if (decl_context
== TYPENAME
)
9881 /* Note that the grammar rejects storage classes
9882 in typenames, fields or parameters. */
9883 if (type_quals
!= TYPE_UNQUALIFIED
)
9884 type_quals
= TYPE_UNQUALIFIED
;
9886 /* Special case: "friend class foo" looks like a TYPENAME context. */
9889 if (type_quals
!= TYPE_UNQUALIFIED
)
9891 error ("type qualifiers specified for friend class declaration");
9892 type_quals
= TYPE_UNQUALIFIED
;
9896 error ("%<inline%> specified for friend class declaration");
9902 /* Don't allow friend declaration without a class-key. */
9903 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9904 permerror (input_location
, "template parameters cannot be friends");
9905 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9906 permerror (input_location
, "friend declaration requires class-key, "
9907 "i.e. %<friend class %T::%D%>",
9908 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9910 permerror (input_location
, "friend declaration requires class-key, "
9911 "i.e. %<friend %#T%>",
9915 /* Only try to do this stuff if we didn't already give up. */
9916 if (type
!= integer_type_node
)
9918 /* A friendly class? */
9919 if (current_class_type
)
9920 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9923 error ("trying to make class %qT a friend of global scope",
9926 type
= void_type_node
;
9929 else if (memfn_quals
)
9931 if (ctype
== NULL_TREE
9932 && TREE_CODE (type
) == METHOD_TYPE
)
9933 ctype
= TYPE_METHOD_BASETYPE (type
);
9936 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9937 /* Core issue #547: need to allow this in template type args. */
9938 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9939 type
= apply_memfn_quals (type
, memfn_quals
);
9941 error ("invalid qualifiers on non-member function type");
9946 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9947 && decl_context
!= CATCHPARM
9948 && TREE_CODE (type
) != UNION_TYPE
9951 error ("abstract declarator %qT used as declaration", type
);
9952 return error_mark_node
;
9955 /* Only functions may be declared using an operator-function-id. */
9957 && IDENTIFIER_OPNAME_P (unqualified_id
)
9958 && TREE_CODE (type
) != FUNCTION_TYPE
9959 && TREE_CODE (type
) != METHOD_TYPE
)
9961 error ("declaration of %qD as non-function", unqualified_id
);
9962 return error_mark_node
;
9965 /* We don't check parameter types here because we can emit a better
9966 error message later. */
9967 if (decl_context
!= PARM
)
9969 type
= check_var_type (unqualified_id
, type
);
9970 if (type
== error_mark_node
)
9971 return error_mark_node
;
9974 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9975 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9977 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9979 if (ctype
|| in_namespace
)
9980 error ("cannot use %<::%> in parameter declaration");
9982 if (type_uses_auto (type
))
9984 error ("parameter declared %<auto%>");
9985 type
= error_mark_node
;
9988 /* A parameter declared as an array of T is really a pointer to T.
9989 One declared as a function is really a pointer to a function.
9990 One declared as a member is really a pointer to member. */
9992 if (TREE_CODE (type
) == ARRAY_TYPE
)
9994 /* Transfer const-ness of array into that of type pointed to. */
9995 type
= build_pointer_type (TREE_TYPE (type
));
9996 type_quals
= TYPE_UNQUALIFIED
;
9998 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9999 type
= build_pointer_type (type
);
10002 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10003 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10005 cp_cv_quals real_quals
= memfn_quals
;
10006 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10007 real_quals
|= TYPE_QUAL_CONST
;
10008 type
= build_memfn_type (type
, ctype
, real_quals
);
10014 if (decl_context
== PARM
)
10016 decl
= cp_build_parm_decl (unqualified_id
, type
);
10018 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10019 memfn_quals
!= TYPE_UNQUALIFIED
,
10020 inlinep
, friendp
, raises
!= NULL_TREE
);
10022 else if (decl_context
== FIELD
)
10024 if (!staticp
&& type_uses_auto (type
))
10026 error ("non-static data member declared %<auto%>");
10027 type
= error_mark_node
;
10030 /* The C99 flexible array extension. */
10031 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10032 && TYPE_DOMAIN (type
) == NULL_TREE
)
10034 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10035 tf_warning_or_error
);
10036 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10039 if (type
== error_mark_node
)
10041 /* Happens when declaring arrays of sizes which
10042 are error_mark_node, for example. */
10045 else if (in_namespace
&& !friendp
)
10047 /* Something like struct S { int N::j; }; */
10048 error ("invalid use of %<::%>");
10049 return error_mark_node
;
10051 else if (TREE_CODE (type
) == FUNCTION_TYPE
10052 || TREE_CODE (type
) == METHOD_TYPE
)
10055 tree function_context
;
10059 /* This should never happen in pure C++ (the check
10060 could be an assert). It could happen in
10061 Objective-C++ if someone writes invalid code that
10062 uses a function declaration for an instance
10063 variable or property (instance variables and
10064 properties are parsed as FIELD_DECLs, but they are
10065 part of an Objective-C class, not a C++ class).
10066 That code is invalid and is caught by this
10070 error ("declaration of function %qD in invalid context",
10072 return error_mark_node
;
10075 /* ``A union may [ ... ] not [ have ] virtual functions.''
10077 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10079 error ("function %qD declared virtual inside a union",
10081 return error_mark_node
;
10084 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10088 error ("%qD cannot be declared virtual, since it "
10089 "is always static",
10096 /* Check that the name used for a destructor makes sense. */
10097 if (sfk
== sfk_destructor
)
10099 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10103 gcc_assert (friendp
);
10104 error ("expected qualified name in friend declaration "
10105 "for destructor %qD", uqname
);
10106 return error_mark_node
;
10109 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10111 error ("declaration of %qD as member of %qT",
10113 return error_mark_node
;
10117 error ("a destructor cannot be %<constexpr%>");
10118 return error_mark_node
;
10121 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10123 error ("expected qualified name in friend declaration "
10124 "for constructor %qD",
10125 id_declarator
->u
.id
.unqualified_name
);
10126 return error_mark_node
;
10129 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10130 function_context
= (ctype
!= NULL_TREE
) ?
10131 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10132 publicp
= (! friendp
|| ! staticp
)
10133 && function_context
== NULL_TREE
;
10134 decl
= grokfndecl (ctype
, type
,
10135 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10136 ? unqualified_id
: dname
,
10139 virtualp
, flags
, memfn_quals
, raises
,
10140 friendp
? -1 : 0, friendp
, publicp
,
10141 inlinep
| (2 * constexpr_p
),
10143 funcdef_flag
, template_count
, in_namespace
,
10144 attrlist
, declarator
->id_loc
);
10145 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10146 if (decl
== NULL_TREE
)
10147 return error_mark_node
;
10149 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10150 /* The decl and setting of decl_attr is also turned off. */
10151 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10154 /* [class.conv.ctor]
10156 A constructor declared without the function-specifier
10157 explicit that can be called with a single parameter
10158 specifies a conversion from the type of its first
10159 parameter to the type of its class. Such a constructor
10160 is called a converting constructor. */
10161 if (explicitp
== 2)
10162 DECL_NONCONVERTING_P (decl
) = 1;
10164 else if (!staticp
&& !dependent_type_p (type
)
10165 && !COMPLETE_TYPE_P (complete_type (type
))
10166 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10168 if (unqualified_id
)
10169 error ("field %qD has incomplete type", unqualified_id
);
10171 error ("name %qT has incomplete type", type
);
10173 /* If we're instantiating a template, tell them which
10174 instantiation made the field's type be incomplete. */
10175 if (current_class_type
10176 && TYPE_NAME (current_class_type
)
10177 && IDENTIFIER_TEMPLATE (current_class_name
)
10179 && declspecs
->type
== type
)
10180 error (" in instantiation of template %qT",
10181 current_class_type
);
10183 return error_mark_node
;
10189 error ("%qE is neither function nor member function; "
10190 "cannot be declared friend", unqualified_id
);
10198 /* Friends are treated specially. */
10199 if (ctype
== current_class_type
)
10200 ; /* We already issued a permerror. */
10201 else if (decl
&& DECL_NAME (decl
))
10203 if (template_class_depth (current_class_type
) == 0)
10205 decl
= check_explicit_specialization
10206 (unqualified_id
, decl
, template_count
,
10207 2 * funcdef_flag
+ 4);
10208 if (decl
== error_mark_node
)
10209 return error_mark_node
;
10212 decl
= do_friend (ctype
, unqualified_id
, decl
,
10218 return error_mark_node
;
10221 /* Structure field. It may not be a function, except for C++. */
10223 if (decl
== NULL_TREE
)
10227 /* C++ allows static class members. All other work
10228 for this is done by grokfield. */
10229 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
10230 set_linkage_for_static_data_member (decl
);
10231 /* Even if there is an in-class initialization, DECL
10232 is considered undefined until an out-of-class
10233 definition is provided. */
10234 DECL_EXTERNAL (decl
) = 1;
10237 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10239 if (constexpr_p
&& !initialized
)
10241 error ("constexpr static data member %qD must have an "
10242 "initializer", decl
);
10243 constexpr_p
= false;
10250 error ("non-static data member %qE declared %<constexpr%>",
10252 constexpr_p
= false;
10254 decl
= build_decl (input_location
,
10255 FIELD_DECL
, unqualified_id
, type
);
10256 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10257 if (bitfield
&& !unqualified_id
)
10258 TREE_NO_WARNING (decl
) = 1;
10260 if (storage_class
== sc_mutable
)
10262 DECL_MUTABLE_P (decl
) = 1;
10263 storage_class
= sc_none
;
10268 /* An attempt is being made to initialize a non-static
10269 member. This is new in C++11. */
10270 maybe_warn_cpp0x (CPP0X_NSDMI
);
10272 /* If this has been parsed with static storage class, but
10273 errors forced staticp to be cleared, ensure NSDMI is
10275 if (declspecs
->storage_class
== sc_static
)
10276 DECL_INITIAL (decl
) = error_mark_node
;
10280 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10281 memfn_quals
!= TYPE_UNQUALIFIED
,
10282 inlinep
, friendp
, raises
!= NULL_TREE
);
10285 else if (TREE_CODE (type
) == FUNCTION_TYPE
10286 || TREE_CODE (type
) == METHOD_TYPE
)
10288 tree original_name
;
10291 if (!unqualified_id
)
10292 return error_mark_node
;
10294 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10295 original_name
= dname
;
10297 original_name
= unqualified_id
;
10299 if (storage_class
== sc_auto
)
10300 error ("storage class %<auto%> invalid for function %qs", name
);
10301 else if (storage_class
== sc_register
)
10302 error ("storage class %<register%> invalid for function %qs", name
);
10304 error ("storage class %<__thread%> invalid for function %qs", name
);
10306 if (virt_specifiers
)
10307 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10308 /* Function declaration not at top level.
10309 Storage classes other than `extern' are not allowed
10310 and `extern' makes no difference. */
10311 if (! toplevel_bindings_p ()
10312 && (storage_class
== sc_static
10313 || declspecs
->specs
[(int)ds_inline
])
10316 if (storage_class
== sc_static
)
10317 pedwarn (input_location
, OPT_pedantic
,
10318 "%<static%> specified invalid for function %qs "
10319 "declared out of global scope", name
);
10321 pedwarn (input_location
, OPT_pedantic
,
10322 "%<inline%> specifier invalid for function %qs "
10323 "declared out of global scope", name
);
10326 if (ctype
== NULL_TREE
)
10330 error ("virtual non-class function %qs", name
);
10333 else if (sfk
== sfk_constructor
10334 || sfk
== sfk_destructor
)
10336 error (funcdef_flag
10337 ? G_("%qs defined in a non-class scope")
10338 : G_("%qs declared in a non-class scope"), name
);
10343 /* Record presence of `static'. */
10344 publicp
= (ctype
!= NULL_TREE
10345 || storage_class
== sc_extern
10346 || storage_class
!= sc_static
);
10348 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10349 virtualp
, flags
, memfn_quals
, raises
,
10351 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10353 template_count
, in_namespace
, attrlist
,
10354 declarator
->id_loc
);
10355 if (decl
== NULL_TREE
)
10356 return error_mark_node
;
10360 int invalid_static
= 0;
10362 /* Don't allow a static member function in a class, and forbid
10363 declaring main to be static. */
10364 if (TREE_CODE (type
) == METHOD_TYPE
)
10366 permerror (input_location
, "cannot declare member function %qD to have "
10367 "static linkage", decl
);
10368 invalid_static
= 1;
10370 else if (current_function_decl
)
10372 /* FIXME need arm citation */
10373 error ("cannot declare static function inside another function");
10374 invalid_static
= 1;
10377 if (invalid_static
)
10380 storage_class
= sc_none
;
10386 /* It's a variable. */
10388 /* An uninitialized decl with `extern' is a reference. */
10389 decl
= grokvardecl (type
, unqualified_id
,
10392 (type_quals
& TYPE_QUAL_CONST
) != 0,
10393 ctype
? ctype
: in_namespace
);
10394 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10395 memfn_quals
!= TYPE_UNQUALIFIED
,
10396 inlinep
, friendp
, raises
!= NULL_TREE
);
10400 DECL_CONTEXT (decl
) = ctype
;
10403 permerror (input_location
, "%<static%> may not be used when defining "
10404 "(as opposed to declaring) a static data member");
10406 storage_class
= sc_none
;
10408 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10410 error ("static member %qD declared %<register%>", decl
);
10411 storage_class
= sc_none
;
10413 if (storage_class
== sc_extern
&& pedantic
)
10415 pedwarn (input_location
, OPT_pedantic
,
10416 "cannot explicitly declare member %q#D to have "
10417 "extern linkage", decl
);
10418 storage_class
= sc_none
;
10421 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10423 error ("declaration of constexpr variable %qD is not a definition",
10425 constexpr_p
= false;
10429 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10431 if (toplevel_bindings_p ())
10433 /* It's common practice (and completely valid) to have a const
10434 be initialized and declared extern. */
10435 if (!(type_quals
& TYPE_QUAL_CONST
))
10436 warning (0, "%qs initialized and declared %<extern%>", name
);
10440 error ("%qs has both %<extern%> and initializer", name
);
10441 return error_mark_node
;
10445 /* Record `register' declaration for warnings on &
10446 and in case doing stupid register allocation. */
10448 if (storage_class
== sc_register
)
10449 DECL_REGISTER (decl
) = 1;
10450 else if (storage_class
== sc_extern
)
10451 DECL_THIS_EXTERN (decl
) = 1;
10452 else if (storage_class
== sc_static
)
10453 DECL_THIS_STATIC (decl
) = 1;
10455 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10456 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10457 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10459 /* Record constancy and volatility on the DECL itself . There's
10460 no need to do this when processing a template; we'll do this
10461 for the instantiated declaration based on the type of DECL. */
10462 if (!processing_template_decl
)
10463 cp_apply_type_quals_to_decl (type_quals
, decl
);
10469 /* Subroutine of start_function. Ensure that each of the parameter
10470 types (as listed in PARMS) is complete, as is required for a
10471 function definition. */
10474 require_complete_types_for_parms (tree parms
)
10476 for (; parms
; parms
= DECL_CHAIN (parms
))
10478 if (dependent_type_p (TREE_TYPE (parms
)))
10480 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10481 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10483 relayout_decl (parms
);
10484 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10487 /* grokparms or complete_type_or_else will have already issued
10489 TREE_TYPE (parms
) = error_mark_node
;
10493 /* Returns nonzero if T is a local variable. */
10496 local_variable_p (const_tree t
)
10498 if ((TREE_CODE (t
) == VAR_DECL
10499 /* A VAR_DECL with a context that is a _TYPE is a static data
10501 && !TYPE_P (CP_DECL_CONTEXT (t
))
10502 /* Any other non-local variable must be at namespace scope. */
10503 && !DECL_NAMESPACE_SCOPE_P (t
))
10504 || (TREE_CODE (t
) == PARM_DECL
))
10510 /* Like local_variable_p, but suitable for use as a tree-walking
10514 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10515 void *data ATTRIBUTE_UNUSED
)
10517 /* Check DECL_NAME to avoid including temporaries. We don't check
10518 DECL_ARTIFICIAL because we do want to complain about 'this'. */
10519 if (local_variable_p (*tp
) && DECL_NAME (*tp
))
10521 else if (TYPE_P (*tp
))
10522 *walk_subtrees
= 0;
10527 /* Check that ARG, which is a default-argument expression for a
10528 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10529 something goes wrong. DECL may also be a _TYPE node, rather than a
10530 DECL, if there is no DECL available. */
10533 check_default_argument (tree decl
, tree arg
)
10538 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10539 /* We get a DEFAULT_ARG when looking at an in-class declaration
10540 with a default argument. Ignore the argument for now; we'll
10541 deal with it after the class is complete. */
10550 decl_type
= TREE_TYPE (decl
);
10552 if (arg
== error_mark_node
10553 || decl
== error_mark_node
10554 || TREE_TYPE (arg
) == error_mark_node
10555 || decl_type
== error_mark_node
)
10556 /* Something already went wrong. There's no need to check
10558 return error_mark_node
;
10560 /* [dcl.fct.default]
10562 A default argument expression is implicitly converted to the
10564 if (!TREE_TYPE (arg
)
10565 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
10568 error ("default argument for %q#D has type %qT",
10569 decl
, TREE_TYPE (arg
));
10571 error ("default argument for parameter of type %qT has type %qT",
10572 decl_type
, TREE_TYPE (arg
));
10574 return error_mark_node
;
10577 /* [dcl.fct.default]
10579 Local variables shall not be used in default argument
10582 The keyword `this' shall not be used in a default argument of a
10583 member function. */
10584 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10587 if (DECL_NAME (var
) == this_identifier
)
10588 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10590 error ("default argument %qE uses local variable %qD", arg
, var
);
10591 return error_mark_node
;
10598 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10601 type_is_deprecated (tree type
)
10603 enum tree_code code
;
10604 if (TREE_DEPRECATED (type
))
10606 if (TYPE_NAME (type
)
10607 && TREE_DEPRECATED (TYPE_NAME (type
)))
10610 /* Do warn about using typedefs to a deprecated class. */
10611 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10612 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10614 code
= TREE_CODE (type
);
10616 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10617 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10618 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10619 return type_is_deprecated (TREE_TYPE (type
));
10621 if (TYPE_PTRMEMFUNC_P (type
))
10622 return type_is_deprecated
10623 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10628 /* Decode the list of parameter types for a function type.
10629 Given the list of things declared inside the parens,
10630 return a list of types.
10632 If this parameter does not end with an ellipsis, we append
10635 *PARMS is set to the chain of PARM_DECLs created. */
10638 grokparms (tree parmlist
, tree
*parms
)
10640 tree result
= NULL_TREE
;
10641 tree decls
= NULL_TREE
;
10645 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10647 tree type
= NULL_TREE
;
10648 tree init
= TREE_PURPOSE (parm
);
10649 tree decl
= TREE_VALUE (parm
);
10650 const char *errmsg
;
10652 if (parm
== void_list_node
)
10655 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10658 type
= TREE_TYPE (decl
);
10659 if (VOID_TYPE_P (type
))
10661 if (same_type_p (type
, void_type_node
)
10662 && DECL_SELF_REFERENCE_P (type
)
10663 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10664 /* this is a parmlist of `(void)', which is ok. */
10666 cxx_incomplete_type_error (decl
, type
);
10667 /* It's not a good idea to actually create parameters of
10668 type `void'; other parts of the compiler assume that a
10669 void type terminates the parameter list. */
10670 type
= error_mark_node
;
10671 TREE_TYPE (decl
) = error_mark_node
;
10674 if (type
!= error_mark_node
10675 && TYPE_FOR_JAVA (type
)
10676 && MAYBE_CLASS_TYPE_P (type
))
10678 error ("parameter %qD has Java class type", decl
);
10679 type
= error_mark_node
;
10680 TREE_TYPE (decl
) = error_mark_node
;
10684 if (type
!= error_mark_node
10685 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10688 type
= error_mark_node
;
10689 TREE_TYPE (decl
) = error_mark_node
;
10692 if (type
!= error_mark_node
)
10694 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10696 tree deptype
= type_is_deprecated (type
);
10698 warn_deprecated_use (deptype
, NULL_TREE
);
10701 /* Top-level qualifiers on the parameters are
10702 ignored for function types. */
10703 type
= cp_build_qualified_type (type
, 0);
10704 if (TREE_CODE (type
) == METHOD_TYPE
)
10706 error ("parameter %qD invalidly declared method type", decl
);
10707 type
= build_pointer_type (type
);
10708 TREE_TYPE (decl
) = type
;
10710 else if (abstract_virtuals_error (decl
, type
))
10711 any_error
= 1; /* Seems like a good idea. */
10712 else if (POINTER_TYPE_P (type
))
10714 /* [dcl.fct]/6, parameter types cannot contain pointers
10715 (references) to arrays of unknown bound. */
10716 tree t
= TREE_TYPE (type
);
10717 int ptr
= TYPE_PTR_P (type
);
10721 if (TYPE_PTR_P (t
))
10723 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10725 else if (!TYPE_DOMAIN (t
))
10729 if (TREE_CODE (t
) == ARRAY_TYPE
)
10731 ? G_("parameter %qD includes pointer to array of "
10732 "unknown bound %qT")
10733 : G_("parameter %qD includes reference to array of "
10734 "unknown bound %qT"),
10740 else if (init
&& !processing_template_decl
)
10741 init
= check_default_argument (decl
, init
);
10744 DECL_CHAIN (decl
) = decls
;
10746 result
= tree_cons (init
, type
, result
);
10748 decls
= nreverse (decls
);
10749 result
= nreverse (result
);
10751 result
= chainon (result
, void_list_node
);
10758 /* D is a constructor or overloaded `operator='.
10760 Let T be the class in which D is declared. Then, this function
10763 -1 if D's is an ill-formed constructor or copy assignment operator
10764 whose first parameter is of type `T'.
10765 0 if D is not a copy constructor or copy assignment
10767 1 if D is a copy constructor or copy assignment operator whose
10768 first parameter is a reference to non-const qualified T.
10769 2 if D is a copy constructor or copy assignment operator whose
10770 first parameter is a reference to const qualified T.
10772 This function can be used as a predicate. Positive values indicate
10773 a copy constructor and nonzero values indicate a copy assignment
10777 copy_fn_p (const_tree d
)
10783 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10785 if (TREE_CODE (d
) == TEMPLATE_DECL
10786 || (DECL_TEMPLATE_INFO (d
)
10787 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10788 /* Instantiations of template member functions are never copy
10789 functions. Note that member functions of templated classes are
10790 represented as template functions internally, and we must
10791 accept those as copy functions. */
10794 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10798 arg_type
= TREE_VALUE (args
);
10799 if (arg_type
== error_mark_node
)
10802 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10804 /* Pass by value copy assignment operator. */
10807 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10808 && !TYPE_REF_IS_RVALUE (arg_type
)
10809 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10811 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10817 args
= TREE_CHAIN (args
);
10819 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10820 /* There are more non-optional args. */
10826 /* D is a constructor or overloaded `operator='.
10828 Let T be the class in which D is declared. Then, this function
10829 returns true when D is a move constructor or move assignment
10830 operator, false otherwise. */
10833 move_fn_p (const_tree d
)
10837 bool result
= false;
10839 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10841 if (cxx_dialect
== cxx98
)
10842 /* There are no move constructors if we are in C++98 mode. */
10845 if (TREE_CODE (d
) == TEMPLATE_DECL
10846 || (DECL_TEMPLATE_INFO (d
)
10847 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10848 /* Instantiations of template member functions are never copy
10849 functions. Note that member functions of templated classes are
10850 represented as template functions internally, and we must
10851 accept those as copy functions. */
10854 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10858 arg_type
= TREE_VALUE (args
);
10859 if (arg_type
== error_mark_node
)
10862 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10863 && TYPE_REF_IS_RVALUE (arg_type
)
10864 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10868 args
= TREE_CHAIN (args
);
10870 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10871 /* There are more non-optional args. */
10877 /* Remember any special properties of member function DECL. */
10880 grok_special_member_properties (tree decl
)
10884 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10887 class_type
= DECL_CONTEXT (decl
);
10888 if (DECL_CONSTRUCTOR_P (decl
))
10890 int ctor
= copy_fn_p (decl
);
10892 if (!DECL_ARTIFICIAL (decl
))
10893 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10899 A non-template constructor for class X is a copy
10900 constructor if its first parameter is of type X&, const
10901 X&, volatile X& or const volatile X&, and either there
10902 are no other parameters or else all other parameters have
10903 default arguments. */
10904 TYPE_HAS_COPY_CTOR (class_type
) = 1;
10905 if (user_provided_p (decl
))
10906 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
10908 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
10910 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10912 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10913 if (user_provided_p (decl
))
10914 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10916 else if (move_fn_p (decl
) && user_provided_p (decl
))
10917 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
10918 else if (is_list_ctor (decl
))
10919 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10921 if (DECL_DECLARED_CONSTEXPR_P (decl
)
10922 && !copy_fn_p (decl
) && !move_fn_p (decl
))
10923 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
10925 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10929 A non-template assignment operator for class X is a copy
10930 assignment operator if its parameter is of type X, X&, const
10931 X&, volatile X& or const volatile X&. */
10933 int assop
= copy_fn_p (decl
);
10937 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
10938 if (user_provided_p (decl
))
10939 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
10941 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
10943 else if (move_fn_p (decl
) && user_provided_p (decl
))
10944 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
10946 /* Destructors are handled in check_methods. */
10949 /* Check a constructor DECL has the correct form. Complains
10950 if the class has a constructor of the form X(X). */
10953 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10955 int ctor_parm
= copy_fn_p (decl
);
10961 A declaration of a constructor for a class X is ill-formed if
10962 its first parameter is of type (optionally cv-qualified) X
10963 and either there are no other parameters or else all other
10964 parameters have default arguments.
10966 We *don't* complain about member template instantiations that
10967 have this form, though; they can occur as we try to decide
10968 what constructor to use during overload resolution. Since
10969 overload resolution will never prefer such a constructor to
10970 the non-template copy constructor (which is either explicitly
10971 or implicitly defined), there's no need to worry about their
10972 existence. Theoretically, they should never even be
10973 instantiated, but that's hard to forestall. */
10974 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10982 /* An operator with this code is unary, but can also be binary. */
10985 ambi_op_p (enum tree_code code
)
10987 return (code
== INDIRECT_REF
10988 || code
== ADDR_EXPR
10989 || code
== UNARY_PLUS_EXPR
10990 || code
== NEGATE_EXPR
10991 || code
== PREINCREMENT_EXPR
10992 || code
== PREDECREMENT_EXPR
);
10995 /* An operator with this name can only be unary. */
10998 unary_op_p (enum tree_code code
)
11000 return (code
== TRUTH_NOT_EXPR
11001 || code
== BIT_NOT_EXPR
11002 || code
== COMPONENT_REF
11003 || code
== TYPE_EXPR
);
11006 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11007 errors are issued for invalid declarations. */
11010 grok_op_properties (tree decl
, bool complain
)
11012 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11014 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11015 tree name
= DECL_NAME (decl
);
11016 enum tree_code operator_code
;
11021 /* Count the number of arguments and check for ellipsis. */
11022 for (argtype
= argtypes
, arity
= 0;
11023 argtype
&& argtype
!= void_list_node
;
11024 argtype
= TREE_CHAIN (argtype
))
11026 ellipsis_p
= !argtype
;
11028 class_type
= DECL_CONTEXT (decl
);
11029 if (class_type
&& !CLASS_TYPE_P (class_type
))
11030 class_type
= NULL_TREE
;
11032 if (DECL_CONV_FN_P (decl
))
11033 operator_code
= TYPE_EXPR
;
11037 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11038 if (ansi_opname (CODE) == name) \
11040 operator_code = (CODE); \
11043 else if (ansi_assopname (CODE) == name) \
11045 operator_code = (CODE); \
11046 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11050 #include "operators.def"
11051 #undef DEF_OPERATOR
11053 gcc_unreachable ();
11056 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11057 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11060 switch (operator_code
)
11063 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11067 TYPE_GETS_DELETE (class_type
) |= 1;
11071 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11074 case VEC_DELETE_EXPR
:
11075 TYPE_GETS_DELETE (class_type
) |= 2;
11082 /* [basic.std.dynamic.allocation]/1:
11084 A program is ill-formed if an allocation function is declared
11085 in a namespace scope other than global scope or declared static
11088 The same also holds true for deallocation functions. */
11089 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11090 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11092 if (DECL_NAMESPACE_SCOPE_P (decl
))
11094 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11096 error ("%qD may not be declared within a namespace", decl
);
11099 else if (!TREE_PUBLIC (decl
))
11101 error ("%qD may not be declared as static", decl
);
11107 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11109 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11110 DECL_IS_OPERATOR_NEW (decl
) = 1;
11112 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11113 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11116 /* An operator function must either be a non-static member function
11117 or have at least one parameter of a class, a reference to a class,
11118 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11119 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11121 if (operator_code
== TYPE_EXPR
11122 || operator_code
== CALL_EXPR
11123 || operator_code
== COMPONENT_REF
11124 || operator_code
== ARRAY_REF
11125 || operator_code
== NOP_EXPR
)
11127 error ("%qD must be a nonstatic member function", decl
);
11134 if (DECL_STATIC_FUNCTION_P (decl
))
11136 error ("%qD must be either a non-static member "
11137 "function or a non-member function", decl
);
11141 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11143 tree arg
= non_reference (TREE_VALUE (p
));
11144 if (arg
== error_mark_node
)
11147 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11148 because these checks are performed even on
11149 template functions. */
11150 if (MAYBE_CLASS_TYPE_P (arg
)
11151 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11155 if (!p
|| p
== void_list_node
)
11158 error ("%qD must have an argument of class or "
11159 "enumerated type", decl
);
11165 /* There are no restrictions on the arguments to an overloaded
11167 if (operator_code
== CALL_EXPR
)
11170 /* Warn about conversion operators that will never be used. */
11171 if (IDENTIFIER_TYPENAME_P (name
)
11172 && ! DECL_TEMPLATE_INFO (decl
)
11174 /* Warn only declaring the function; there is no need to
11175 warn again about out-of-class definitions. */
11176 && class_type
== current_class_type
)
11178 tree t
= TREE_TYPE (name
);
11179 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11182 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11184 if (TREE_CODE (t
) == VOID_TYPE
)
11185 warning (OPT_Wconversion
,
11187 ? G_("conversion to a reference to void "
11188 "will never use a type conversion operator")
11189 : G_("conversion to void "
11190 "will never use a type conversion operator"));
11191 else if (class_type
)
11193 if (t
== class_type
)
11194 warning (OPT_Wconversion
,
11196 ? G_("conversion to a reference to the same type "
11197 "will never use a type conversion operator")
11198 : G_("conversion to the same type "
11199 "will never use a type conversion operator"));
11200 /* Don't force t to be complete here. */
11201 else if (MAYBE_CLASS_TYPE_P (t
)
11202 && COMPLETE_TYPE_P (t
)
11203 && DERIVED_FROM_P (t
, class_type
))
11204 warning (OPT_Wconversion
,
11206 ? G_("conversion to a reference to a base class "
11207 "will never use a type conversion operator")
11208 : G_("conversion to a base class "
11209 "will never use a type conversion operator"));
11214 if (operator_code
== COND_EXPR
)
11217 error ("ISO C++ prohibits overloading operator ?:");
11220 else if (ellipsis_p
)
11222 error ("%qD must not have variable number of arguments", decl
);
11225 else if (ambi_op_p (operator_code
))
11228 /* We pick the one-argument operator codes by default, so
11229 we don't have to change anything. */
11231 else if (arity
== 2)
11233 /* If we thought this was a unary operator, we now know
11234 it to be a binary operator. */
11235 switch (operator_code
)
11238 operator_code
= MULT_EXPR
;
11242 operator_code
= BIT_AND_EXPR
;
11245 case UNARY_PLUS_EXPR
:
11246 operator_code
= PLUS_EXPR
;
11250 operator_code
= MINUS_EXPR
;
11253 case PREINCREMENT_EXPR
:
11254 operator_code
= POSTINCREMENT_EXPR
;
11257 case PREDECREMENT_EXPR
:
11258 operator_code
= POSTDECREMENT_EXPR
;
11262 gcc_unreachable ();
11265 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11267 if ((operator_code
== POSTINCREMENT_EXPR
11268 || operator_code
== POSTDECREMENT_EXPR
)
11269 && ! processing_template_decl
11270 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11273 error ("postfix %qD must take %<int%> as its argument",
11276 error ("postfix %qD must take %<int%> as its second "
11284 error ("%qD must take either zero or one argument", decl
);
11286 error ("%qD must take either one or two arguments", decl
);
11290 /* More Effective C++ rule 6. */
11292 && (operator_code
== POSTINCREMENT_EXPR
11293 || operator_code
== POSTDECREMENT_EXPR
11294 || operator_code
== PREINCREMENT_EXPR
11295 || operator_code
== PREDECREMENT_EXPR
))
11297 tree arg
= TREE_VALUE (argtypes
);
11298 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11299 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11300 arg
= TREE_TYPE (arg
);
11301 arg
= TYPE_MAIN_VARIANT (arg
);
11302 if (operator_code
== PREINCREMENT_EXPR
11303 || operator_code
== PREDECREMENT_EXPR
)
11305 if (TREE_CODE (ret
) != REFERENCE_TYPE
11306 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11308 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11309 build_reference_type (arg
));
11313 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11314 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11318 else if (unary_op_p (operator_code
))
11323 error ("%qD must take %<void%>", decl
);
11325 error ("%qD must take exactly one argument", decl
);
11329 else /* if (binary_op_p (operator_code)) */
11334 error ("%qD must take exactly one argument", decl
);
11336 error ("%qD must take exactly two arguments", decl
);
11340 /* More Effective C++ rule 7. */
11342 && (operator_code
== TRUTH_ANDIF_EXPR
11343 || operator_code
== TRUTH_ORIF_EXPR
11344 || operator_code
== COMPOUND_EXPR
))
11345 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11349 /* Effective C++ rule 23. */
11352 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11353 && (operator_code
== PLUS_EXPR
11354 || operator_code
== MINUS_EXPR
11355 || operator_code
== TRUNC_DIV_EXPR
11356 || operator_code
== MULT_EXPR
11357 || operator_code
== TRUNC_MOD_EXPR
)
11358 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11359 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11361 /* [over.oper]/8 */
11362 for (; argtypes
&& argtypes
!= void_list_node
;
11363 argtypes
= TREE_CHAIN (argtypes
))
11364 if (TREE_PURPOSE (argtypes
))
11366 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11367 if (operator_code
== POSTINCREMENT_EXPR
11368 || operator_code
== POSTDECREMENT_EXPR
)
11370 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
11375 error ("%qD cannot have default arguments", decl
);
11383 /* Return a string giving the keyword associate with CODE. */
11385 static const char *
11386 tag_name (enum tag_types code
)
11398 case typename_type
:
11401 gcc_unreachable ();
11405 /* Name lookup in an elaborated-type-specifier (after the keyword
11406 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11407 elaborated-type-specifier is invalid, issue a diagnostic and return
11408 error_mark_node; otherwise, return the *_TYPE to which it referred.
11409 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11412 check_elaborated_type_specifier (enum tag_types tag_code
,
11414 bool allow_template_p
)
11418 if (decl
== error_mark_node
)
11419 return error_mark_node
;
11423 struct S { struct S *p; };
11425 name lookup will find the TYPE_DECL for the implicit "S::S"
11426 typedef. Adjust for that here. */
11427 if (DECL_SELF_REFERENCE_P (decl
))
11428 decl
= TYPE_NAME (TREE_TYPE (decl
));
11430 type
= TREE_TYPE (decl
);
11432 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11433 is false for this case as well. */
11434 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11436 error ("using template type parameter %qT after %qs",
11437 type
, tag_name (tag_code
));
11438 return error_mark_node
;
11440 /* Accept bound template template parameters. */
11441 else if (allow_template_p
11442 && TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
)
11446 If the identifier resolves to a typedef-name or the
11447 simple-template-id resolves to an alias template
11448 specialization, the elaborated-type-specifier is ill-formed.
11450 In other words, the only legitimate declaration to use in the
11451 elaborated type specifier is the implicit typedef created when
11452 the type is declared. */
11453 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11454 && !DECL_SELF_REFERENCE_P (decl
)
11455 && tag_code
!= typename_type
)
11457 if (alias_template_specialization_p (type
))
11458 error ("using alias template specialization %qT after %qs",
11459 type
, tag_name (tag_code
));
11461 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11462 inform (DECL_SOURCE_LOCATION (decl
),
11463 "%qD has a previous declaration here", decl
);
11464 return error_mark_node
;
11466 else if (TREE_CODE (type
) != RECORD_TYPE
11467 && TREE_CODE (type
) != UNION_TYPE
11468 && tag_code
!= enum_type
11469 && tag_code
!= typename_type
)
11471 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11472 error ("%q+T has a previous declaration here", type
);
11473 return error_mark_node
;
11475 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11476 && tag_code
== enum_type
)
11478 error ("%qT referred to as enum", type
);
11479 error ("%q+T has a previous declaration here", type
);
11480 return error_mark_node
;
11482 else if (!allow_template_p
11483 && TREE_CODE (type
) == RECORD_TYPE
11484 && CLASSTYPE_IS_TEMPLATE (type
))
11486 /* If a class template appears as elaborated type specifier
11487 without a template header such as:
11489 template <class T> class C {};
11490 void f(class C); // No template header here
11492 then the required template argument is missing. */
11493 error ("template argument required for %<%s %T%>",
11494 tag_name (tag_code
),
11495 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11496 return error_mark_node
;
11502 /* Lookup NAME in elaborate type specifier in scope according to
11503 SCOPE and issue diagnostics if necessary.
11504 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11505 found, and ERROR_MARK_NODE for type error. */
11508 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11509 tag_scope scope
, bool template_header_p
)
11513 if (scope
== ts_global
)
11515 /* First try ordinary name lookup, ignoring hidden class name
11516 injected via friend declaration. */
11517 decl
= lookup_name_prefer_type (name
, 2);
11518 /* If that fails, the name will be placed in the smallest
11519 non-class, non-function-prototype scope according to 3.3.1/5.
11520 We may already have a hidden name declared as friend in this
11521 scope. So lookup again but not ignoring hidden names.
11522 If we find one, that name will be made visible rather than
11523 creating a new tag. */
11525 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11528 decl
= lookup_type_scope (name
, scope
);
11530 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
11531 decl
= DECL_TEMPLATE_RESULT (decl
);
11533 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11535 /* Look for invalid nested type:
11539 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11541 error ("%qD has the same name as the class in which it is "
11544 return error_mark_node
;
11547 /* Two cases we need to consider when deciding if a class
11548 template is allowed as an elaborated type specifier:
11549 1. It is a self reference to its own class.
11550 2. It comes with a template header.
11554 template <class T> class C {
11555 class C *c1; // DECL_SELF_REFERENCE_P is true
11558 template <class U> class C; // template_header_p is true
11559 template <class T> class C<T>::D {
11560 class C *c2; // DECL_SELF_REFERENCE_P is true
11563 t
= check_elaborated_type_specifier (tag_code
,
11566 | DECL_SELF_REFERENCE_P (decl
));
11569 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11571 error ("reference to %qD is ambiguous", name
);
11572 print_candidates (decl
);
11573 return error_mark_node
;
11579 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11580 Define the tag as a forward-reference if it is not defined.
11582 If a declaration is given, process it here, and report an error if
11583 multiple declarations are not identical.
11585 SCOPE is TS_CURRENT when this is also a definition. Only look in
11586 the current frame for the name (since C++ allows new names in any
11587 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11588 declaration. Only look beginning from the current scope outward up
11589 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11591 TEMPLATE_HEADER_P is true when this declaration is preceded by
11592 a set of template parameters. */
11595 xref_tag_1 (enum tag_types tag_code
, tree name
,
11596 tag_scope scope
, bool template_header_p
)
11598 enum tree_code code
;
11600 tree context
= NULL_TREE
;
11602 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11608 code
= RECORD_TYPE
;
11614 code
= ENUMERAL_TYPE
;
11617 gcc_unreachable ();
11620 /* In case of anonymous name, xref_tag is only called to
11621 make type node and push name. Name lookup is not required. */
11622 if (ANON_AGGRNAME_P (name
))
11625 t
= lookup_and_check_tag (tag_code
, name
,
11626 scope
, template_header_p
);
11628 if (t
== error_mark_node
)
11629 return error_mark_node
;
11631 if (scope
!= ts_current
&& t
&& current_class_type
11632 && template_class_depth (current_class_type
)
11633 && template_header_p
)
11635 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11636 definition of this tag. Since, in addition, we are currently
11637 processing a (member) template declaration of a template
11638 class, we must be very careful; consider:
11645 { template <class V>
11646 friend struct S1; };
11648 Here, the S2::S1 declaration should not be confused with the
11649 outer declaration. In particular, the inner version should
11650 have a template parameter of level 2, not level 1. This
11651 would be particularly important if the member declaration
11654 template <class V = U> friend struct S1;
11656 say, when we should tsubst into `U' when instantiating
11657 S2. On the other hand, when presented with:
11667 we must find the inner binding eventually. We
11668 accomplish this by making sure that the new type we
11669 create to represent this declaration has the right
11671 context
= TYPE_CONTEXT (t
);
11677 /* If no such tag is yet defined, create a forward-reference node
11678 and record it as the "definition".
11679 When a real declaration of this type is found,
11680 the forward-reference will be altered into a real type. */
11681 if (code
== ENUMERAL_TYPE
)
11683 error ("use of enum %q#D without previous declaration", name
);
11684 return error_mark_node
;
11688 t
= make_class_type (code
);
11689 TYPE_CONTEXT (t
) = context
;
11690 t
= pushtag (name
, t
, scope
);
11695 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11697 if (!redeclare_class_template (t
, current_template_parms
))
11698 return error_mark_node
;
11700 else if (!processing_template_decl
11701 && CLASS_TYPE_P (t
)
11702 && CLASSTYPE_IS_TEMPLATE (t
))
11704 error ("redeclaration of %qT as a non-template", t
);
11705 error ("previous declaration %q+D", t
);
11706 return error_mark_node
;
11709 /* Make injected friend class visible. */
11710 if (scope
!= ts_within_enclosing_non_class
11711 && hidden_name_p (TYPE_NAME (t
)))
11713 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11714 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11716 if (TYPE_TEMPLATE_INFO (t
))
11718 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11719 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11727 /* Wrapper for xref_tag_1. */
11730 xref_tag (enum tag_types tag_code
, tree name
,
11731 tag_scope scope
, bool template_header_p
)
11735 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
11736 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
11737 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
11743 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11745 enum tag_types tag_kind
;
11747 if (TREE_CODE (old
) == RECORD_TYPE
)
11748 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11750 tag_kind
= union_type
;
11752 if (id
== NULL_TREE
)
11753 id
= TYPE_IDENTIFIER (old
);
11755 return xref_tag (tag_kind
, id
, scope
, false);
11758 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11759 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11760 access_* node, and the TREE_VALUE is the type of the base-class.
11761 Non-NULL TREE_TYPE indicates virtual inheritance.
11763 Returns true if the binfo hierarchy was successfully created,
11764 false if an error was detected. */
11767 xref_basetypes (tree ref
, tree base_list
)
11770 tree binfo
, base_binfo
;
11771 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11772 unsigned max_bases
= 0; /* Maximum direct bases. */
11774 tree default_access
;
11775 tree igo_prev
; /* Track Inheritance Graph Order. */
11777 if (ref
== error_mark_node
)
11780 /* The base of a derived class is private by default, all others are
11782 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11783 && CLASSTYPE_DECLARED_CLASS (ref
)
11784 ? access_private_node
: access_public_node
);
11786 /* First, make sure that any templates in base-classes are
11787 instantiated. This ensures that if we call ourselves recursively
11788 we do not get confused about which classes are marked and which
11790 basep
= &base_list
;
11793 tree basetype
= TREE_VALUE (*basep
);
11795 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11796 && !complete_type_or_else (basetype
, NULL
))
11797 /* An incomplete type. Remove it from the list. */
11798 *basep
= TREE_CHAIN (*basep
);
11802 if (TREE_TYPE (*basep
))
11804 if (CLASS_TYPE_P (basetype
))
11805 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11806 basep
= &TREE_CHAIN (*basep
);
11810 TYPE_MARKED_P (ref
) = 1;
11812 /* The binfo slot should be empty, unless this is an (ill-formed)
11814 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11816 error ("redefinition of %q#T", ref
);
11820 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11822 binfo
= make_tree_binfo (max_bases
);
11824 TYPE_BINFO (ref
) = binfo
;
11825 BINFO_OFFSET (binfo
) = size_zero_node
;
11826 BINFO_TYPE (binfo
) = ref
;
11828 /* Apply base-class info set up to the variants of this type. */
11829 fixup_type_variants (ref
);
11833 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11834 /* An aggregate cannot have baseclasses. */
11835 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11837 if (TREE_CODE (ref
) == UNION_TYPE
)
11839 error ("derived union %qT invalid", ref
);
11846 if (TYPE_FOR_JAVA (ref
))
11848 error ("Java class %qT cannot have multiple bases", ref
);
11855 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11857 if (TYPE_FOR_JAVA (ref
))
11859 error ("Java class %qT cannot have virtual bases", ref
);
11864 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11866 tree access
= TREE_PURPOSE (base_list
);
11867 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11868 tree basetype
= TREE_VALUE (base_list
);
11870 if (access
== access_default_node
)
11871 access
= default_access
;
11873 if (PACK_EXPANSION_P (basetype
))
11874 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11875 if (TREE_CODE (basetype
) == TYPE_DECL
)
11876 basetype
= TREE_TYPE (basetype
);
11877 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11879 error ("base type %qT fails to be a struct or class type",
11884 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11885 TYPE_FOR_JAVA (ref
) = 1;
11887 base_binfo
= NULL_TREE
;
11888 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
11890 base_binfo
= TYPE_BINFO (basetype
);
11891 /* The original basetype could have been a typedef'd type. */
11892 basetype
= BINFO_TYPE (base_binfo
);
11894 /* Inherit flags from the base. */
11895 TYPE_HAS_NEW_OPERATOR (ref
)
11896 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11897 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11898 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11899 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11900 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11901 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11902 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11903 CLASSTYPE_REPEATED_BASE_P (ref
)
11904 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11907 /* We must do this test after we've seen through a typedef
11909 if (TYPE_MARKED_P (basetype
))
11911 if (basetype
== ref
)
11912 error ("recursive type %qT undefined", basetype
);
11914 error ("duplicate base type %qT invalid", basetype
);
11918 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11919 /* Regenerate the pack expansion for the bases. */
11920 basetype
= make_pack_expansion (basetype
);
11922 TYPE_MARKED_P (basetype
) = 1;
11924 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11925 &igo_prev
, via_virtual
);
11926 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11927 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11929 BINFO_BASE_APPEND (binfo
, base_binfo
);
11930 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11933 if (VEC_length (tree
, CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
11934 /* If we didn't get max_vbases vbases, we must have shared at
11935 least one of them, and are therefore diamond shaped. */
11936 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11938 /* Unmark all the types. */
11939 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11940 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11941 TYPE_MARKED_P (ref
) = 0;
11943 /* Now see if we have a repeated base type. */
11944 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11946 for (base_binfo
= binfo
; base_binfo
;
11947 base_binfo
= TREE_CHAIN (base_binfo
))
11949 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11951 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11954 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11956 for (base_binfo
= binfo
; base_binfo
;
11957 base_binfo
= TREE_CHAIN (base_binfo
))
11958 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11959 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11968 /* Copies the enum-related properties from type SRC to type DST.
11969 Used with the underlying type of an enum and the enum itself. */
11971 copy_type_enum (tree dst
, tree src
)
11974 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
11976 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
11977 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
11978 TYPE_SIZE (t
) = TYPE_SIZE (src
);
11979 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
11980 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
11981 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
11982 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
11983 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
11984 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
11988 /* Begin compiling the definition of an enumeration type.
11991 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11993 UNDERLYING_TYPE is the type that will be used as the storage for
11994 the enumeration type. This should be NULL_TREE if no storage type
11997 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11999 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12001 Returns the type object, as yet incomplete.
12002 Also records info about it so that build_enumerator
12003 may be used to declare the individual values as they are read. */
12006 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12007 bool scoped_enum_p
, bool *is_new
)
12009 tree prevtype
= NULL_TREE
;
12010 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
12014 /* [C++0x dcl.enum]p5:
12016 If not explicitly specified, the underlying type of a scoped
12017 enumeration type is int. */
12018 if (!underlying_type
&& scoped_enum_p
)
12019 underlying_type
= integer_type_node
;
12021 if (underlying_type
)
12022 underlying_type
= cv_unqualified (underlying_type
);
12024 /* If this is the real definition for a previous forward reference,
12025 fill in the contents in the same object that used to be the
12026 forward reference. */
12028 enumtype
= lookup_and_check_tag (enum_type
, name
,
12029 /*tag_scope=*/ts_current
,
12030 /*template_header_p=*/false);
12032 /* In case of a template_decl, the only check that should be deferred
12033 to instantiation time is the comparison of underlying types. */
12034 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12036 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12038 error_at (input_location
, "scoped/unscoped mismatch "
12039 "in enum %q#T", enumtype
);
12040 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12041 "previous definition here");
12042 enumtype
= error_mark_node
;
12044 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12046 error_at (input_location
, "underlying type 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 (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12053 && !dependent_type_p (underlying_type
)
12054 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12055 && !same_type_p (underlying_type
,
12056 ENUM_UNDERLYING_TYPE (enumtype
)))
12058 error_at (input_location
, "different underlying type "
12059 "in enum %q#T", enumtype
);
12060 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12061 "previous definition here");
12062 underlying_type
= NULL_TREE
;
12066 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12067 || processing_template_decl
)
12069 /* In case of error, make a dummy enum to allow parsing to
12071 if (enumtype
== error_mark_node
)
12073 name
= make_anon_name ();
12074 enumtype
= NULL_TREE
;
12077 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12078 of an opaque enum, or an opaque enum of an already defined
12079 enumeration (C++0x only).
12080 In any other case, it'll be NULL_TREE. */
12086 prevtype
= enumtype
;
12088 /* Do not push the decl more than once, unless we need to
12089 compare underlying types at instantiation time */
12091 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12092 || (underlying_type
12093 && dependent_type_p (underlying_type
))
12094 || (ENUM_UNDERLYING_TYPE (enumtype
)
12095 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12097 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12098 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12101 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12104 if (enumtype
== error_mark_node
)
12105 return error_mark_node
;
12107 /* The enum is considered opaque until the opening '{' of the
12108 enumerator list. */
12109 SET_OPAQUE_ENUM_P (enumtype
, true);
12110 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12113 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12115 if (underlying_type
)
12117 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12119 copy_type_enum (enumtype
, underlying_type
);
12120 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12122 else if (dependent_type_p (underlying_type
))
12123 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12125 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12126 underlying_type
, enumtype
);
12129 /* If into a template class, the returned enum is always the first
12130 declaration (opaque or not) seen. This way all the references to
12131 this type will be to the same declaration. The following ones are used
12132 only to check for definition errors. */
12133 if (prevtype
&& processing_template_decl
)
12139 /* After processing and defining all the values of an enumeration type,
12140 install their decls in the enumeration type.
12141 ENUMTYPE is the type object. */
12144 finish_enum_value_list (tree enumtype
)
12147 tree underlying_type
;
12150 tree minnode
, maxnode
;
12153 bool fixed_underlying_type_p
12154 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12156 /* We built up the VALUES in reverse order. */
12157 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12159 /* For an enum defined in a template, just set the type of the values;
12160 all further processing is postponed until the template is
12161 instantiated. We need to set the type so that tsubst of a CONST_DECL
12163 if (processing_template_decl
)
12165 for (values
= TYPE_VALUES (enumtype
);
12167 values
= TREE_CHAIN (values
))
12168 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12172 /* Determine the minimum and maximum values of the enumerators. */
12173 if (TYPE_VALUES (enumtype
))
12175 minnode
= maxnode
= NULL_TREE
;
12177 for (values
= TYPE_VALUES (enumtype
);
12179 values
= TREE_CHAIN (values
))
12181 decl
= TREE_VALUE (values
);
12183 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12184 each enumerator has the type of its enumeration. Prior to the
12185 closing brace, the type of each enumerator is the type of its
12186 initializing value. */
12187 TREE_TYPE (decl
) = enumtype
;
12189 /* Update the minimum and maximum values, if appropriate. */
12190 value
= DECL_INITIAL (decl
);
12191 if (value
== error_mark_node
)
12192 value
= integer_zero_node
;
12193 /* Figure out what the minimum and maximum values of the
12194 enumerators are. */
12196 minnode
= maxnode
= value
;
12197 else if (tree_int_cst_lt (maxnode
, value
))
12199 else if (tree_int_cst_lt (value
, minnode
))
12206 If the enumerator-list is empty, the underlying type is as if
12207 the enumeration had a single enumerator with value 0. */
12208 minnode
= maxnode
= integer_zero_node
;
12210 if (!fixed_underlying_type_p
)
12212 /* Compute the number of bits require to represent all values of the
12213 enumeration. We must do this before the type of MINNODE and
12214 MAXNODE are transformed, since tree_int_cst_min_precision relies
12215 on the TREE_TYPE of the value it is passed. */
12216 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12217 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12218 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12219 int precision
= MAX (lowprec
, highprec
);
12221 bool use_short_enum
;
12223 /* Determine the underlying type of the enumeration.
12227 The underlying type of an enumeration is an integral type that
12228 can represent all the enumerator values defined in the
12229 enumeration. It is implementation-defined which integral type is
12230 used as the underlying type for an enumeration except that the
12231 underlying type shall not be larger than int unless the value of
12232 an enumerator cannot fit in an int or unsigned int.
12234 We use "int" or an "unsigned int" as the underlying type, even if
12235 a smaller integral type would work, unless the user has
12236 explicitly requested that we use the smallest possible type. The
12237 user can request that for all enumerations with a command line
12238 flag, or for just one enumeration with an attribute. */
12240 use_short_enum
= flag_short_enums
12241 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12243 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12247 underlying_type
= integer_types
[itk
];
12248 if (underlying_type
!= NULL_TREE
12249 && TYPE_PRECISION (underlying_type
) >= precision
12250 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12253 if (itk
== itk_none
)
12257 IF no integral type can represent all the enumerator values, the
12258 enumeration is ill-formed. */
12259 error ("no integral type can represent all of the enumerator values "
12260 "for %qT", enumtype
);
12261 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12262 underlying_type
= integer_types
[itk_unsigned_long_long
];
12267 The value of sizeof() applied to an enumeration type, an object
12268 of an enumeration type, or an enumerator, is the value of sizeof()
12269 applied to the underlying type. */
12270 copy_type_enum (enumtype
, underlying_type
);
12272 /* Compute the minimum and maximum values for the type.
12276 For an enumeration where emin is the smallest enumerator and emax
12277 is the largest, the values of the enumeration are the values of the
12278 underlying type in the range bmin to bmax, where bmin and bmax are,
12279 respectively, the smallest and largest values of the smallest bit-
12280 field that can store emin and emax. */
12282 /* The middle-end currently assumes that types with TYPE_PRECISION
12283 narrower than their underlying type are suitably zero or sign
12284 extended to fill their mode. Similarly, it assumes that the front
12285 end assures that a value of a particular type must be within
12286 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12288 We used to set these fields based on bmin and bmax, but that led
12289 to invalid assumptions like optimizing away bounds checking. So
12290 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12291 TYPE_MAX_VALUE to the values for the mode above and only restrict
12292 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12293 ENUM_UNDERLYING_TYPE (enumtype
)
12294 = build_distinct_type_copy (underlying_type
);
12295 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12296 set_min_and_max_values_for_integral_type
12297 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12299 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12300 if (flag_strict_enums
)
12301 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12305 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12307 /* Convert each of the enumerators to the type of the underlying
12308 type of the enumeration. */
12309 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12311 location_t saved_location
;
12313 decl
= TREE_VALUE (values
);
12314 saved_location
= input_location
;
12315 input_location
= DECL_SOURCE_LOCATION (decl
);
12316 if (fixed_underlying_type_p
)
12317 /* If the enumeration type has a fixed underlying type, we
12318 already checked all of the enumerator values. */
12319 value
= DECL_INITIAL (decl
);
12321 value
= perform_implicit_conversion (underlying_type
,
12322 DECL_INITIAL (decl
),
12323 tf_warning_or_error
);
12324 input_location
= saved_location
;
12326 /* Do not clobber shared ints. */
12327 value
= copy_node (value
);
12329 TREE_TYPE (value
) = enumtype
;
12330 DECL_INITIAL (decl
) = value
;
12333 /* Fix up all variant types of this enum type. */
12334 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12335 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12337 /* Finish debugging output for this type. */
12338 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12341 /* Finishes the enum type. This is called only the first time an
12342 enumeration is seen, be it opaque or odinary.
12343 ENUMTYPE is the type object. */
12346 finish_enum (tree enumtype
)
12348 if (processing_template_decl
)
12350 if (at_function_scope_p ())
12351 add_stmt (build_min (TAG_DEFN
, enumtype
));
12355 /* If this is a forward declaration, there should not be any variants,
12356 though we can get a variant in the middle of an enum-specifier with
12357 wacky code like 'enum E { e = sizeof(const E*) };' */
12358 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12359 && (TYPE_VALUES (enumtype
)
12360 || !TYPE_NEXT_VARIANT (enumtype
)));
12363 /* Build and install a CONST_DECL for an enumeration constant of the
12364 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12365 LOC is the location of NAME.
12366 Assignment of sequential values by default is handled here. */
12369 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12375 /* If the VALUE was erroneous, pretend it wasn't there; that will
12376 result in the enum being assigned the next value in sequence. */
12377 if (value
== error_mark_node
)
12380 /* Remove no-op casts from the value. */
12382 STRIP_TYPE_NOPS (value
);
12384 if (! processing_template_decl
)
12386 /* Validate and default VALUE. */
12387 if (value
!= NULL_TREE
)
12389 value
= cxx_constant_value (value
);
12391 if (TREE_CODE (value
) != INTEGER_CST
12392 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12394 error ("enumerator value for %qD is not an integer constant",
12400 /* Default based on previous value. */
12401 if (value
== NULL_TREE
)
12403 if (TYPE_VALUES (enumtype
))
12406 unsigned HOST_WIDE_INT lo
;
12410 /* C++03 7.2/4: If no initializer is specified for the first
12411 enumerator, the type is an unspecified integral
12412 type. Otherwise the type is the same as the type of the
12413 initializing value of the preceding enumerator unless the
12414 incremented value is not representable in that type, in
12415 which case the type is an unspecified integral type
12416 sufficient to contain the incremented value. */
12417 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12418 if (error_operand_p (prev_value
))
12419 value
= error_mark_node
;
12422 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
12423 TREE_INT_CST_HIGH (prev_value
),
12428 tree type
= TREE_TYPE (prev_value
);
12429 bool pos
= (TYPE_UNSIGNED (type
) || hi
>= 0);
12430 di
.low
= lo
; di
.high
= hi
;
12431 if (!double_int_fits_to_tree_p (type
, di
))
12434 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12436 type
= integer_types
[itk
];
12437 if (type
!= NULL_TREE
12438 && (pos
|| !TYPE_UNSIGNED (type
))
12439 && double_int_fits_to_tree_p (type
, di
))
12442 if (type
&& cxx_dialect
< cxx0x
12443 && itk
> itk_unsigned_long
)
12444 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12445 incremented enumerator value is too large for %<unsigned long%>" : "\
12446 incremented enumerator value is too large for %<long%>");
12448 if (type
== NULL_TREE
)
12451 value
= double_int_to_tree (type
, di
);
12456 error ("overflow in enumeration values at %qD", name
);
12457 value
= error_mark_node
;
12462 value
= integer_zero_node
;
12465 /* Remove no-op casts from the value. */
12466 STRIP_TYPE_NOPS (value
);
12468 /* If the underlying type of the enum is fixed, check whether
12469 the enumerator values fits in the underlying type. If it
12470 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12471 if (ENUM_UNDERLYING_TYPE (enumtype
)
12473 && TREE_CODE (value
) == INTEGER_CST
12474 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12476 error ("enumerator value %E is too large for underlying type %<%T%>",
12477 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12479 /* Silently convert the value so that we can continue. */
12480 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12485 /* C++ associates enums with global, function, or class declarations. */
12486 context
= current_scope ();
12488 /* Build the actual enumeration constant. Note that the enumeration
12489 constants have the underlying type of the enum (if it is fixed)
12490 or the type of their initializer (if the underlying type of the
12491 enum is not fixed):
12495 If the underlying type is fixed, the type of each enumerator
12496 prior to the closing brace is the underlying type; if the
12497 initializing value of an enumerator cannot be represented by
12498 the underlying type, the program is ill-formed. If the
12499 underlying type is not fixed, the type of each enumerator is
12500 the type of its initializing value.
12502 If the underlying type is not fixed, it will be computed by
12503 finish_enum and we will reset the type of this enumerator. Of
12504 course, if we're processing a template, there may be no value. */
12505 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12507 if (context
&& context
== current_class_type
)
12508 /* This enum declaration is local to the class. We need the full
12509 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12510 decl
= build_lang_decl_loc (loc
, CONST_DECL
, name
, type
);
12512 /* It's a global enum, or it's local to a function. (Note local to
12513 a function could mean local to a class method. */
12514 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12516 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12517 TREE_CONSTANT (decl
) = 1;
12518 TREE_READONLY (decl
) = 1;
12519 DECL_INITIAL (decl
) = value
;
12521 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12522 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12523 on the TYPE_FIELDS list for `S'. (That's so that you can say
12524 things like `S::i' later.) */
12525 finish_member_declaration (decl
);
12529 /* Add this enumeration constant to the list for this type. */
12530 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12533 /* Look for an enumerator with the given NAME within the enumeration
12534 type ENUMTYPE. This routine is used primarily for qualified name
12535 lookup into an enumerator in C++0x, e.g.,
12537 enum class Color { Red, Green, Blue };
12539 Color color = Color::Red;
12541 Returns the value corresponding to the enumerator, or
12542 NULL_TREE if no such enumerator was found. */
12544 lookup_enumerator (tree enumtype
, tree name
)
12547 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12549 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12550 return e
? TREE_VALUE (e
) : NULL_TREE
;
12554 /* We're defining DECL. Make sure that its type is OK. */
12557 check_function_type (tree decl
, tree current_function_parms
)
12559 tree fntype
= TREE_TYPE (decl
);
12560 tree return_type
= complete_type (TREE_TYPE (fntype
));
12562 /* In a function definition, arg types must be complete. */
12563 require_complete_types_for_parms (current_function_parms
);
12565 if (dependent_type_p (return_type
))
12567 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12568 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12570 tree args
= TYPE_ARG_TYPES (fntype
);
12572 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12573 error ("return type %q#T is incomplete", return_type
);
12575 error ("return type has Java class type %q#T", return_type
);
12577 /* Make it return void instead. */
12578 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12579 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12581 TREE_CHAIN (args
));
12583 fntype
= build_function_type (void_type_node
, args
);
12585 = build_exception_variant (fntype
,
12586 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12587 fntype
= (cp_build_type_attribute_variant
12588 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12589 TREE_TYPE (decl
) = fntype
;
12592 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12595 /* Create the FUNCTION_DECL for a function definition.
12596 DECLSPECS and DECLARATOR are the parts of the declaration;
12597 they describe the function's name and the type it returns,
12598 but twisted together in a fashion that parallels the syntax of C.
12600 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12601 DECLARATOR is really the DECL for the function we are about to
12602 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12603 indicating that the function is an inline defined in-class.
12605 This function creates a binding context for the function body
12606 as well as setting up the FUNCTION_DECL in current_function_decl.
12608 For C++, we must first check whether that datum makes any sense.
12609 For example, "class A local_a(1,2);" means that variable local_a
12610 is an aggregate of type A, which should have a constructor
12611 applied to it with the argument list [1, 2].
12613 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12614 or may be a BLOCK if the function has been defined previously
12615 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12616 error_mark_node if the function has never been defined, or
12617 a BLOCK if the function has been defined somewhere. */
12620 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12622 tree ctype
= NULL_TREE
;
12625 int doing_friend
= 0;
12626 cp_binding_level
*bl
;
12627 tree current_function_parms
;
12628 struct c_fileinfo
*finfo
12629 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12630 bool honor_interface
;
12632 /* Sanity check. */
12633 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12634 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12636 fntype
= TREE_TYPE (decl1
);
12637 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12638 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12640 /* ISO C++ 11.4/5. A friend function defined in a class is in
12641 the (lexical) scope of the class in which it is defined. */
12642 if (!ctype
&& DECL_FRIEND_P (decl1
))
12644 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12646 /* CTYPE could be null here if we're dealing with a template;
12647 for example, `inline friend float foo()' inside a template
12648 will have no CTYPE set. */
12649 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12655 if (DECL_DECLARED_INLINE_P (decl1
)
12656 && lookup_attribute ("noinline", attrs
))
12657 warning (0, "inline function %q+D given attribute noinline", decl1
);
12659 /* Handle gnu_inline attribute. */
12660 if (GNU_INLINE_P (decl1
))
12662 DECL_EXTERNAL (decl1
) = 1;
12663 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12664 DECL_INTERFACE_KNOWN (decl1
) = 1;
12665 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12668 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12669 /* This is a constructor, we must ensure that any default args
12670 introduced by this definition are propagated to the clones
12671 now. The clones are used directly in overload resolution. */
12672 adjust_clone_args (decl1
);
12674 /* Sometimes we don't notice that a function is a static member, and
12675 build a METHOD_TYPE for it. Fix that up now. */
12676 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12677 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12679 /* Set up current_class_type, and enter the scope of the class, if
12682 push_nested_class (ctype
);
12683 else if (DECL_STATIC_FUNCTION_P (decl1
))
12684 push_nested_class (DECL_CONTEXT (decl1
));
12686 /* Now that we have entered the scope of the class, we must restore
12687 the bindings for any template parameters surrounding DECL1, if it
12688 is an inline member template. (Order is important; consider the
12689 case where a template parameter has the same name as a field of
12690 the class.) It is not until after this point that
12691 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12692 if (flags
& SF_INCLASS_INLINE
)
12693 maybe_begin_member_template_processing (decl1
);
12695 /* Effective C++ rule 15. */
12697 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12698 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12699 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
12701 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12702 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12703 if (!DECL_INITIAL (decl1
))
12704 DECL_INITIAL (decl1
) = error_mark_node
;
12706 /* This function exists in static storage.
12707 (This does not mean `static' in the C sense!) */
12708 TREE_STATIC (decl1
) = 1;
12710 /* We must call push_template_decl after current_class_type is set
12711 up. (If we are processing inline definitions after exiting a
12712 class scope, current_class_type will be NULL_TREE until set above
12713 by push_nested_class.) */
12714 if (processing_template_decl
)
12716 /* FIXME: Handle error_mark_node more gracefully. */
12717 tree newdecl1
= push_template_decl (decl1
);
12718 if (newdecl1
!= error_mark_node
)
12722 /* We are now in the scope of the function being defined. */
12723 current_function_decl
= decl1
;
12725 /* Save the parm names or decls from this function's declarator
12726 where store_parm_decls will find them. */
12727 current_function_parms
= DECL_ARGUMENTS (decl1
);
12729 /* Make sure the parameter and return types are reasonable. When
12730 you declare a function, these types can be incomplete, but they
12731 must be complete when you define the function. */
12732 check_function_type (decl1
, current_function_parms
);
12734 /* Build the return declaration for the function. */
12735 restype
= TREE_TYPE (fntype
);
12736 if (DECL_RESULT (decl1
) == NULL_TREE
)
12740 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
12741 DECL_ARTIFICIAL (resdecl
) = 1;
12742 DECL_IGNORED_P (resdecl
) = 1;
12743 DECL_RESULT (decl1
) = resdecl
;
12745 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
12748 /* Let the user know we're compiling this function. */
12749 announce_function (decl1
);
12751 /* Record the decl so that the function name is defined.
12752 If we already have a decl for this name, and it is a FUNCTION_DECL,
12753 use the old decl. */
12754 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12756 /* A specialization is not used to guide overload resolution. */
12757 if (!DECL_FUNCTION_MEMBER_P (decl1
)
12758 && !(DECL_USE_TEMPLATE (decl1
) &&
12759 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
12761 tree olddecl
= pushdecl (decl1
);
12763 if (olddecl
== error_mark_node
)
12764 /* If something went wrong when registering the declaration,
12765 use DECL1; we have to have a FUNCTION_DECL to use when
12766 parsing the body of the function. */
12770 /* Otherwise, OLDDECL is either a previous declaration
12771 of the same function or DECL1 itself. */
12773 if (warn_missing_declarations
12774 && olddecl
== decl1
12775 && !DECL_MAIN_P (decl1
)
12776 && TREE_PUBLIC (decl1
)
12777 && !DECL_DECLARED_INLINE_P (decl1
))
12781 /* Check whether DECL1 is in an anonymous
12783 for (context
= DECL_CONTEXT (decl1
);
12785 context
= DECL_CONTEXT (context
))
12787 if (TREE_CODE (context
) == NAMESPACE_DECL
12788 && DECL_NAME (context
) == NULL_TREE
)
12792 if (context
== NULL
)
12793 warning (OPT_Wmissing_declarations
,
12794 "no previous declaration for %q+D", decl1
);
12802 /* We need to set the DECL_CONTEXT. */
12803 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12804 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12806 fntype
= TREE_TYPE (decl1
);
12808 /* If #pragma weak applies, mark the decl appropriately now.
12809 The pragma only applies to global functions. Because
12810 determining whether or not the #pragma applies involves
12811 computing the mangled name for the declaration, we cannot
12812 apply the pragma until after we have merged this declaration
12813 with any previous declarations; if the original declaration
12814 has a linkage specification, that specification applies to
12815 the definition as well, and may affect the mangled name. */
12816 if (DECL_FILE_SCOPE_P (decl1
))
12817 maybe_apply_pragma_weak (decl1
);
12820 /* Reset this in case the call to pushdecl changed it. */
12821 current_function_decl
= decl1
;
12823 gcc_assert (DECL_INITIAL (decl1
));
12825 /* This function may already have been parsed, in which case just
12826 return; our caller will skip over the body without parsing. */
12827 if (DECL_INITIAL (decl1
) != error_mark_node
)
12830 /* Initialize RTL machinery. We cannot do this until
12831 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12832 even when processing a template; this is how we get
12833 CFUN set up, and our per-function variables initialized.
12834 FIXME factor out the non-RTL stuff. */
12835 bl
= current_binding_level
;
12836 allocate_struct_function (decl1
, processing_template_decl
);
12838 /* Initialize the language data structures. Whenever we start
12839 a new function, we destroy temporaries in the usual way. */
12840 cfun
->language
= ggc_alloc_cleared_language_function ();
12841 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12842 current_binding_level
= bl
;
12844 /* Start the statement-tree, start the tree now. */
12845 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12847 /* If we are (erroneously) defining a function that we have already
12848 defined before, wipe out what we knew before. */
12849 if (!DECL_PENDING_INLINE_P (decl1
))
12850 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12852 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12854 /* We know that this was set up by `grokclassfn'. We do not
12855 wait until `store_parm_decls', since evil parse errors may
12856 never get us to that point. Here we keep the consistency
12857 between `current_class_type' and `current_class_ptr'. */
12858 tree t
= DECL_ARGUMENTS (decl1
);
12860 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12861 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12863 cp_function_chain
->x_current_class_ref
12864 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12865 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12866 cp_function_chain
->x_current_class_ptr
= t
;
12868 /* Constructors and destructors need to know whether they're "in
12869 charge" of initializing virtual base classes. */
12870 t
= DECL_CHAIN (t
);
12871 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12873 current_in_charge_parm
= t
;
12874 t
= DECL_CHAIN (t
);
12876 if (DECL_HAS_VTT_PARM_P (decl1
))
12878 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12879 current_vtt_parm
= t
;
12883 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12884 /* Implicitly-defined methods (like the
12885 destructor for a class in which no destructor
12886 is explicitly declared) must not be defined
12887 until their definition is needed. So, we
12888 ignore interface specifications for
12889 compiler-generated functions. */
12890 && !DECL_ARTIFICIAL (decl1
));
12892 if (processing_template_decl
)
12893 /* Don't mess with interface flags. */;
12894 else if (DECL_INTERFACE_KNOWN (decl1
))
12896 tree ctx
= decl_function_context (decl1
);
12898 if (DECL_NOT_REALLY_EXTERN (decl1
))
12899 DECL_EXTERNAL (decl1
) = 0;
12901 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12902 && TREE_PUBLIC (ctx
))
12903 /* This is a function in a local class in an extern inline
12905 comdat_linkage (decl1
);
12907 /* If this function belongs to an interface, it is public.
12908 If it belongs to someone else's interface, it is also external.
12909 This only affects inlines and template instantiations. */
12910 else if (!finfo
->interface_unknown
&& honor_interface
)
12912 if (DECL_DECLARED_INLINE_P (decl1
)
12913 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12915 DECL_EXTERNAL (decl1
)
12916 = (finfo
->interface_only
12917 || (DECL_DECLARED_INLINE_P (decl1
)
12918 && ! flag_implement_inlines
12919 && !DECL_VINDEX (decl1
)));
12921 /* For WIN32 we also want to put these in linkonce sections. */
12922 maybe_make_one_only (decl1
);
12925 DECL_EXTERNAL (decl1
) = 0;
12926 DECL_INTERFACE_KNOWN (decl1
) = 1;
12927 /* If this function is in an interface implemented in this file,
12928 make sure that the back end knows to emit this function
12930 if (!DECL_EXTERNAL (decl1
))
12931 mark_needed (decl1
);
12933 else if (finfo
->interface_unknown
&& finfo
->interface_only
12934 && honor_interface
)
12936 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12937 interface, we will have both finfo->interface_unknown and
12938 finfo->interface_only set. In that case, we don't want to
12939 use the normal heuristics because someone will supply a
12940 #pragma implementation elsewhere, and deducing it here would
12941 produce a conflict. */
12942 comdat_linkage (decl1
);
12943 DECL_EXTERNAL (decl1
) = 0;
12944 DECL_INTERFACE_KNOWN (decl1
) = 1;
12945 DECL_DEFER_OUTPUT (decl1
) = 1;
12949 /* This is a definition, not a reference.
12950 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12951 if (!GNU_INLINE_P (decl1
))
12952 DECL_EXTERNAL (decl1
) = 0;
12954 if ((DECL_DECLARED_INLINE_P (decl1
)
12955 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12956 && ! DECL_INTERFACE_KNOWN (decl1
))
12957 DECL_DEFER_OUTPUT (decl1
) = 1;
12959 DECL_INTERFACE_KNOWN (decl1
) = 1;
12962 /* Determine the ELF visibility attribute for the function. We must not
12963 do this before calling "pushdecl", as we must allow "duplicate_decls"
12964 to merge any attributes appropriately. We also need to wait until
12966 if (!DECL_CLONED_FUNCTION_P (decl1
))
12967 determine_visibility (decl1
);
12969 begin_scope (sk_function_parms
, decl1
);
12973 if (DECL_DESTRUCTOR_P (decl1
)
12974 || (DECL_CONSTRUCTOR_P (decl1
)
12975 && targetm
.cxx
.cdtor_returns_this ()))
12977 cdtor_label
= build_decl (input_location
,
12978 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12979 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12982 start_fname_decls ();
12984 store_parm_decls (current_function_parms
);
12988 /* Like start_preparsed_function, except that instead of a
12989 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12991 Returns 1 on success. If the DECLARATOR is not suitable for a function
12992 (it defines a datum instead), we return 0, which tells
12993 yyparse to report a parse error. */
12996 start_function (cp_decl_specifier_seq
*declspecs
,
12997 const cp_declarator
*declarator
,
13002 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13003 if (decl1
== error_mark_node
)
13005 /* If the declarator is not suitable for a function definition,
13006 cause a syntax error. */
13007 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13009 error ("invalid function declaration");
13013 if (DECL_MAIN_P (decl1
))
13014 /* main must return int. grokfndecl should have corrected it
13015 (and issued a diagnostic) if the user got it wrong. */
13016 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13017 integer_type_node
));
13019 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13024 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13028 use_eh_spec_block (tree fn
)
13030 return (flag_exceptions
&& flag_enforce_eh_specs
13031 && !processing_template_decl
13032 && !type_throw_all_p (TREE_TYPE (fn
))
13033 /* We insert the EH_SPEC_BLOCK only in the original
13034 function; then, it is copied automatically to the
13036 && !DECL_CLONED_FUNCTION_P (fn
)
13037 /* Implicitly-generated constructors and destructors have
13038 exception specifications. However, those specifications
13039 are the union of the possible exceptions specified by the
13040 constructors/destructors for bases and members, so no
13041 unallowed exception will ever reach this function. By
13042 not creating the EH_SPEC_BLOCK we save a little memory,
13043 and we avoid spurious warnings about unreachable
13045 && !DECL_DEFAULTED_FN (fn
));
13048 /* Store the parameter declarations into the current function declaration.
13049 This is called after parsing the parameter declarations, before
13050 digesting the body of the function.
13052 Also install to binding contour return value identifier, if any. */
13055 store_parm_decls (tree current_function_parms
)
13057 tree fndecl
= current_function_decl
;
13060 /* This is a chain of any other decls that came in among the parm
13061 declarations. If a parm is declared with enum {foo, bar} x;
13062 then CONST_DECLs for foo and bar are put here. */
13063 tree nonparms
= NULL_TREE
;
13065 if (current_function_parms
)
13067 /* This case is when the function was defined with an ANSI prototype.
13068 The parms already have decls, so we need not do anything here
13069 except record them as in effect
13070 and complain if any redundant old-style parm decls were written. */
13072 tree specparms
= current_function_parms
;
13075 /* Must clear this because it might contain TYPE_DECLs declared
13077 current_binding_level
->names
= NULL
;
13079 /* If we're doing semantic analysis, then we'll call pushdecl
13080 for each of these. We must do them in reverse order so that
13081 they end in the correct forward order. */
13082 specparms
= nreverse (specparms
);
13084 for (parm
= specparms
; parm
; parm
= next
)
13086 next
= DECL_CHAIN (parm
);
13087 if (TREE_CODE (parm
) == PARM_DECL
)
13089 if (DECL_NAME (parm
) == NULL_TREE
13090 || TREE_CODE (parm
) != VOID_TYPE
)
13093 error ("parameter %qD declared void", parm
);
13097 /* If we find an enum constant or a type tag,
13098 put it aside for the moment. */
13099 TREE_CHAIN (parm
) = NULL_TREE
;
13100 nonparms
= chainon (nonparms
, parm
);
13104 /* Get the decls in their original chain order and record in the
13105 function. This is all and only the PARM_DECLs that were
13106 pushed into scope by the loop above. */
13107 DECL_ARGUMENTS (fndecl
) = getdecls ();
13110 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13112 /* Now store the final chain of decls for the arguments
13113 as the decl-chain of the current lexical scope.
13114 Put the enumerators in as well, at the front so that
13115 DECL_ARGUMENTS is not modified. */
13116 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13118 if (use_eh_spec_block (current_function_decl
))
13119 current_eh_spec_block
= begin_eh_spec_block ();
13123 /* We have finished doing semantic analysis on DECL, but have not yet
13124 generated RTL for its body. Save away our current state, so that
13125 when we want to generate RTL later we know what to do. */
13128 save_function_data (tree decl
)
13130 struct language_function
*f
;
13132 /* Save the language-specific per-function data so that we can
13133 get it back when we really expand this function. */
13134 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13137 f
= ggc_alloc_language_function ();
13138 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13139 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13141 /* Clear out the bits we don't need. */
13142 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13143 f
->bindings
= NULL
;
13144 f
->x_local_names
= NULL
;
13145 f
->base
.local_typedefs
= NULL
;
13149 /* Set the return value of the constructor (if present). */
13152 finish_constructor_body (void)
13157 if (targetm
.cxx
.cdtor_returns_this ()
13158 && (! TYPE_FOR_JAVA (current_class_type
)))
13160 /* Any return from a constructor will end up here. */
13161 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13163 val
= DECL_ARGUMENTS (current_function_decl
);
13164 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13165 DECL_RESULT (current_function_decl
), val
);
13166 /* Return the address of the object. */
13167 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13168 add_stmt (exprstmt
);
13172 /* Do all the processing for the beginning of a destructor; set up the
13173 vtable pointers and cleanups for bases and members. */
13176 begin_destructor_body (void)
13178 tree compound_stmt
;
13180 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13181 issued an error message. We still want to try to process the
13182 body of the function, but initialize_vtbl_ptrs will crash if
13183 TYPE_BINFO is NULL. */
13184 if (COMPLETE_TYPE_P (current_class_type
))
13186 compound_stmt
= begin_compound_stmt (0);
13187 /* Make all virtual function table pointers in non-virtual base
13188 classes point to CURRENT_CLASS_TYPE's virtual function
13190 initialize_vtbl_ptrs (current_class_ptr
);
13191 finish_compound_stmt (compound_stmt
);
13193 /* And insert cleanups for our bases and members so that they
13194 will be properly destroyed if we throw. */
13195 push_base_cleanups ();
13199 /* At the end of every destructor we generate code to delete the object if
13200 necessary. Do that now. */
13203 finish_destructor_body (void)
13207 /* Any return from a destructor will end up here; that way all base
13208 and member cleanups will be run when the function returns. */
13209 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13211 /* In a virtual destructor, we must call delete. */
13212 if (DECL_VIRTUAL_P (current_function_decl
))
13215 tree virtual_size
= cxx_sizeof (current_class_type
);
13219 At the point of definition of a virtual destructor (including
13220 an implicit definition), non-placement operator delete shall
13221 be looked up in the scope of the destructor's class and if
13222 found shall be accessible and unambiguous. */
13223 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
13225 /*global_p=*/false,
13226 /*placement=*/NULL_TREE
,
13227 /*alloc_fn=*/NULL_TREE
);
13229 if_stmt
= begin_if_stmt ();
13230 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13231 current_in_charge_parm
,
13234 finish_expr_stmt (exprstmt
);
13235 finish_then_clause (if_stmt
);
13236 finish_if_stmt (if_stmt
);
13239 if (targetm
.cxx
.cdtor_returns_this ())
13243 val
= DECL_ARGUMENTS (current_function_decl
);
13244 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13245 DECL_RESULT (current_function_decl
), val
);
13246 /* Return the address of the object. */
13247 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13248 add_stmt (exprstmt
);
13252 /* Do the necessary processing for the beginning of a function body, which
13253 in this case includes member-initializers, but not the catch clauses of
13254 a function-try-block. Currently, this means opening a binding level
13255 for the member-initializers (in a ctor), member cleanups (in a dtor),
13256 and capture proxies (in a lambda operator()). */
13259 begin_function_body (void)
13263 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13266 if (processing_template_decl
)
13267 /* Do nothing now. */;
13269 /* Always keep the BLOCK node associated with the outermost pair of
13270 curly braces of a function. These are needed for correct
13271 operation of dwarfout.c. */
13272 keep_next_level (true);
13274 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13276 if (processing_template_decl
)
13277 /* Do nothing now. */;
13278 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13279 begin_destructor_body ();
13284 /* Do the processing for the end of a function body. Currently, this means
13285 closing out the cleanups for fully-constructed bases and members, and in
13286 the case of the destructor, deleting the object if desired. Again, this
13287 is only meaningful for [cd]tors, since they are the only functions where
13288 there is a significant distinction between the main body and any
13289 function catch clauses. Handling, say, main() return semantics here
13290 would be wrong, as flowing off the end of a function catch clause for
13291 main() would also need to return 0. */
13294 finish_function_body (tree compstmt
)
13296 if (compstmt
== NULL_TREE
)
13299 /* Close the block. */
13300 finish_compound_stmt (compstmt
);
13302 if (processing_template_decl
)
13303 /* Do nothing now. */;
13304 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13305 finish_constructor_body ();
13306 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13307 finish_destructor_body ();
13310 /* Given a function, returns the BLOCK corresponding to the outermost level
13311 of curly braces, skipping the artificial block created for constructor
13315 outer_curly_brace_block (tree fndecl
)
13317 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13318 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13319 /* Skip the artificial function body block. */
13320 block
= BLOCK_SUBBLOCKS (block
);
13324 /* If FNDECL is a class's key method, add the class to the list of
13325 keyed classes that should be emitted. */
13328 record_key_method_defined (tree fndecl
)
13330 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13331 && DECL_VIRTUAL_P (fndecl
)
13332 && !processing_template_decl
)
13334 tree fnclass
= DECL_CONTEXT (fndecl
);
13335 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13336 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13340 /* Subroutine of finish_function.
13341 Save the body of constexpr functions for possible
13342 future compile time evaluation. */
13345 maybe_save_function_definition (tree fun
)
13347 if (!processing_template_decl
13348 && DECL_DECLARED_CONSTEXPR_P (fun
)
13349 && !DECL_CLONED_FUNCTION_P (fun
))
13350 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13353 /* Finish up a function declaration and compile that function
13354 all the way to assembler language output. The free the storage
13355 for the function definition.
13357 FLAGS is a bitwise or of the following values:
13359 We just finished processing the body of an in-class inline
13360 function definition. (This processing will have taken place
13361 after the class definition is complete.) */
13364 finish_function (int flags
)
13366 tree fndecl
= current_function_decl
;
13367 tree fntype
, ctype
= NULL_TREE
;
13368 int inclass_inline
= (flags
& 2) != 0;
13370 /* When we get some parse errors, we can end up without a
13371 current_function_decl, so cope. */
13372 if (fndecl
== NULL_TREE
)
13373 return error_mark_node
;
13375 if (c_dialect_objc ())
13376 objc_finish_function ();
13378 gcc_assert (!defer_mark_used_calls
);
13379 defer_mark_used_calls
= true;
13381 record_key_method_defined (fndecl
);
13383 fntype
= TREE_TYPE (fndecl
);
13385 /* TREE_READONLY (fndecl) = 1;
13386 This caused &foo to be of type ptr-to-const-function
13387 which then got a warning when stored in a ptr-to-function variable. */
13389 gcc_assert (building_stmt_list_p ());
13390 /* The current function is being defined, so its DECL_INITIAL should
13391 be set, and unless there's a multiple definition, it should be
13392 error_mark_node. */
13393 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13395 /* For a cloned function, we've already got all the code we need;
13396 there's no need to add any extra bits. */
13397 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13399 if (DECL_MAIN_P (current_function_decl
))
13401 /* Make it so that `main' always returns 0 by default (or
13404 finish_return_stmt (integer_one_node
);
13406 finish_return_stmt (integer_zero_node
);
13410 if (use_eh_spec_block (current_function_decl
))
13411 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13412 (TREE_TYPE (current_function_decl
)),
13413 current_eh_spec_block
);
13416 /* If we're saving up tree structure, tie off the function now. */
13417 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13419 finish_fname_decls ();
13421 /* If this function can't throw any exceptions, remember that. */
13422 if (!processing_template_decl
13423 && !cp_function_chain
->can_throw
13424 && !flag_non_call_exceptions
13425 && !decl_replaceable_p (fndecl
))
13426 TREE_NOTHROW (fndecl
) = 1;
13428 /* This must come after expand_function_end because cleanups might
13429 have declarations (from inline functions) that need to go into
13430 this function's blocks. */
13432 /* If the current binding level isn't the outermost binding level
13433 for this function, either there is a bug, or we have experienced
13434 syntax errors and the statement tree is malformed. */
13435 if (current_binding_level
->kind
!= sk_function_parms
)
13437 /* Make sure we have already experienced errors. */
13438 gcc_assert (errorcount
);
13440 /* Throw away the broken statement tree and extra binding
13442 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13444 while (current_binding_level
->kind
!= sk_function_parms
)
13446 if (current_binding_level
->kind
== sk_class
)
13447 pop_nested_class ();
13449 poplevel (0, 0, 0);
13452 poplevel (1, 0, 1);
13454 /* Statements should always be full-expressions at the outermost set
13455 of curly braces for a function. */
13456 gcc_assert (stmts_are_full_exprs_p ());
13458 /* Save constexpr function body before it gets munged by
13459 the NRV transformation. */
13460 maybe_save_function_definition (fndecl
);
13462 /* Set up the named return value optimization, if we can. Candidate
13463 variables are selected in check_return_expr. */
13464 if (current_function_return_value
)
13466 tree r
= current_function_return_value
;
13469 if (r
!= error_mark_node
13470 /* This is only worth doing for fns that return in memory--and
13471 simpler, since we don't have to worry about promoted modes. */
13472 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13473 /* Only allow this for variables declared in the outer scope of
13474 the function so we know that their lifetime always ends with a
13475 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13476 we were to do this optimization in tree-ssa. */
13477 && (outer
= outer_curly_brace_block (fndecl
))
13478 && chain_member (r
, BLOCK_VARS (outer
)))
13479 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13481 current_function_return_value
= NULL_TREE
;
13484 /* Remember that we were in class scope. */
13485 if (current_class_name
)
13486 ctype
= current_class_type
;
13488 /* Must mark the RESULT_DECL as being in this function. */
13489 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13491 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13492 to the FUNCTION_DECL node itself. */
13493 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13495 /* Save away current state, if appropriate. */
13496 if (!processing_template_decl
)
13497 save_function_data (fndecl
);
13499 /* Complain if there's just no return statement. */
13500 if (warn_return_type
13501 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13502 && !dependent_type_p (TREE_TYPE (fntype
))
13503 && !current_function_returns_value
&& !current_function_returns_null
13504 /* Don't complain if we abort or throw. */
13505 && !current_function_returns_abnormally
13506 /* Don't complain if we are declared noreturn. */
13507 && !TREE_THIS_VOLATILE (fndecl
)
13508 && !DECL_NAME (DECL_RESULT (fndecl
))
13509 && !TREE_NO_WARNING (fndecl
)
13510 /* Structor return values (if any) are set by the compiler. */
13511 && !DECL_CONSTRUCTOR_P (fndecl
)
13512 && !DECL_DESTRUCTOR_P (fndecl
))
13514 warning (OPT_Wreturn_type
,
13515 "no return statement in function returning non-void");
13516 TREE_NO_WARNING (fndecl
) = 1;
13519 /* Store the end of the function, so that we get good line number
13520 info for the epilogue. */
13521 cfun
->function_end_locus
= input_location
;
13523 /* Complain about parameters that are only set, but never otherwise used. */
13524 if (warn_unused_but_set_parameter
13525 && !processing_template_decl
13526 && errorcount
== unused_but_set_errorcount
13527 && !DECL_CLONED_FUNCTION_P (fndecl
))
13531 for (decl
= DECL_ARGUMENTS (fndecl
);
13533 decl
= DECL_CHAIN (decl
))
13534 if (TREE_USED (decl
)
13535 && TREE_CODE (decl
) == PARM_DECL
13536 && !DECL_READ_P (decl
)
13537 && DECL_NAME (decl
)
13538 && !DECL_ARTIFICIAL (decl
)
13539 && !TREE_NO_WARNING (decl
)
13540 && !DECL_IN_SYSTEM_HEADER (decl
)
13541 && TREE_TYPE (decl
) != error_mark_node
13542 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13543 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13544 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13545 warning (OPT_Wunused_but_set_parameter
,
13546 "parameter %q+D set but not used", decl
);
13547 unused_but_set_errorcount
= errorcount
;
13550 /* Complain about locally defined typedefs that are not used in this
13552 maybe_warn_unused_local_typedefs ();
13554 /* Genericize before inlining. */
13555 if (!processing_template_decl
)
13557 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13558 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13559 cp_genericize (fndecl
);
13560 /* Clear out the bits we don't need. */
13561 f
->x_current_class_ptr
= NULL
;
13562 f
->x_current_class_ref
= NULL
;
13563 f
->x_eh_spec_block
= NULL
;
13564 f
->x_in_charge_parm
= NULL
;
13565 f
->x_vtt_parm
= NULL
;
13566 f
->x_return_value
= NULL
;
13567 f
->bindings
= NULL
;
13568 f
->extern_decl_map
= NULL
;
13570 /* Clear out the bits we don't need. */
13571 local_names
= NULL
;
13573 /* We're leaving the context of this function, so zap cfun. It's still in
13574 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13576 current_function_decl
= NULL
;
13578 /* If this is an in-class inline definition, we may have to pop the
13579 bindings for the template parameters that we added in
13580 maybe_begin_member_template_processing when start_function was
13582 if (inclass_inline
)
13583 maybe_end_member_template_processing ();
13585 /* Leave the scope of the class. */
13587 pop_nested_class ();
13592 current_function_decl
= NULL_TREE
;
13594 defer_mark_used_calls
= false;
13595 if (deferred_mark_used_calls
)
13600 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13602 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13608 /* Create the FUNCTION_DECL for a function definition.
13609 DECLSPECS and DECLARATOR are the parts of the declaration;
13610 they describe the return type and the name of the function,
13611 but twisted together in a fashion that parallels the syntax of C.
13613 This function creates a binding context for the function body
13614 as well as setting up the FUNCTION_DECL in current_function_decl.
13616 Returns a FUNCTION_DECL on success.
13618 If the DECLARATOR is not suitable for a function (it defines a datum
13619 instead), we return 0, which tells yyparse to report a parse error.
13621 May return void_type_node indicating that this method is actually
13622 a friend. See grokfield for more details.
13624 Came here with a `.pushlevel' .
13626 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13627 CHANGES TO CODE IN `grokfield'. */
13630 grokmethod (cp_decl_specifier_seq
*declspecs
,
13631 const cp_declarator
*declarator
, tree attrlist
)
13633 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13636 if (fndecl
== error_mark_node
)
13637 return error_mark_node
;
13639 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13641 error ("invalid member function declaration");
13642 return error_mark_node
;
13646 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13648 /* Pass friends other than inline friend functions back. */
13649 if (fndecl
== void_type_node
)
13652 if (DECL_IN_AGGR_P (fndecl
))
13654 if (DECL_CLASS_SCOPE_P (fndecl
))
13655 error ("%qD is already defined in class %qT", fndecl
,
13656 DECL_CONTEXT (fndecl
));
13657 return error_mark_node
;
13660 check_template_shadow (fndecl
);
13662 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13663 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13665 /* We process method specializations in finish_struct_1. */
13666 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13668 fndecl
= push_template_decl (fndecl
);
13669 if (fndecl
== error_mark_node
)
13673 if (! DECL_FRIEND_P (fndecl
))
13675 if (DECL_CHAIN (fndecl
))
13677 fndecl
= copy_node (fndecl
);
13678 TREE_CHAIN (fndecl
) = NULL_TREE
;
13682 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
13684 DECL_IN_AGGR_P (fndecl
) = 1;
13689 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13690 we can lay it out later, when and if its type becomes complete. */
13693 maybe_register_incomplete_var (tree var
)
13695 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
13697 /* Keep track of variables with incomplete types. */
13698 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
13699 && DECL_EXTERNAL (var
))
13701 tree inner_type
= TREE_TYPE (var
);
13703 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
13704 inner_type
= TREE_TYPE (inner_type
);
13705 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
13707 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
13708 /* RTTI TD entries are created while defining the type_info. */
13709 || (TYPE_LANG_SPECIFIC (inner_type
)
13710 && TYPE_BEING_DEFINED (inner_type
)))
13713 = VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, NULL
);
13715 iv
->incomplete_type
= inner_type
;
13720 /* Called when a class type (given by TYPE) is defined. If there are
13721 any existing VAR_DECLs whose type has been completed by this
13722 declaration, update them now. */
13725 complete_vars (tree type
)
13728 incomplete_var
*iv
;
13730 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
13732 if (same_type_p (type
, iv
->incomplete_type
))
13734 tree var
= iv
->decl
;
13735 tree type
= TREE_TYPE (var
);
13736 /* Complete the type of the variable. The VAR_DECL itself
13737 will be laid out in expand_expr. */
13738 complete_type (type
);
13739 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
13740 /* Remove this entry from the list. */
13741 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
13747 /* Check for pending declarations which may have abstract type. */
13748 complete_type_check_abstract (type
);
13751 /* If DECL is of a type which needs a cleanup, build and return an
13752 expression to perform that cleanup here. Return NULL_TREE if no
13753 cleanup need be done. */
13756 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
13762 /* Assume no cleanup is required. */
13763 cleanup
= NULL_TREE
;
13765 if (error_operand_p (decl
))
13768 /* Handle "__attribute__((cleanup))". We run the cleanup function
13769 before the destructor since the destructor is what actually
13770 terminates the lifetime of the object. */
13771 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
13778 /* Get the name specified by the user for the cleanup function. */
13779 id
= TREE_VALUE (TREE_VALUE (attr
));
13780 /* Look up the name to find the cleanup function to call. It is
13781 important to use lookup_name here because that is what is
13782 used in c-common.c:handle_cleanup_attribute when performing
13783 initial checks on the attribute. Note that those checks
13784 include ensuring that the function found is not an overloaded
13785 function, or an object with an overloaded call operator,
13786 etc.; we can rely on the fact that the function found is an
13787 ordinary FUNCTION_DECL. */
13788 fn
= lookup_name (id
);
13789 arg
= build_address (decl
);
13791 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
13792 if (cleanup
== error_mark_node
)
13793 return error_mark_node
;
13795 /* Handle ordinary C++ destructors. */
13796 type
= TREE_TYPE (decl
);
13797 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
13799 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
13800 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
13801 && CLASSTYPE_VBASECLASSES (type
));
13805 if (TREE_CODE (type
) == ARRAY_TYPE
)
13808 addr
= build_address (decl
);
13810 /* Optimize for space over speed here. */
13811 if (!has_vbases
|| flag_expensive_optimizations
)
13812 flags
|= LOOKUP_NONVIRTUAL
;
13814 call
= build_delete (TREE_TYPE (addr
), addr
,
13815 sfk_complete_destructor
, flags
, 0, complain
);
13816 if (call
== error_mark_node
)
13817 cleanup
= error_mark_node
;
13819 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
13824 /* build_delete sets the location of the destructor call to the
13825 current location, even though the destructor is going to be
13826 called later, at the end of the current scope. This can lead to
13827 a "jumpy" behaviour for users of debuggers when they step around
13828 the end of the block. So let's unset the location of the
13829 destructor call instead. */
13830 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
13831 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
13836 /* When a stmt has been parsed, this function is called. */
13843 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13844 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13845 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13848 static_fn_type (tree memfntype
)
13853 if (TYPE_PTRMEMFUNC_P (memfntype
))
13854 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13855 if (POINTER_TYPE_P (memfntype
)
13856 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13857 memfntype
= TREE_TYPE (memfntype
);
13858 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13860 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13861 args
= TYPE_ARG_TYPES (memfntype
);
13862 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13863 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13864 fntype
= (cp_build_type_attribute_variant
13865 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13866 fntype
= (build_exception_variant
13867 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13871 /* DECL was originally constructed as a non-static member function,
13872 but turned out to be static. Update it accordingly. */
13875 revert_static_member_fn (tree decl
)
13877 tree stype
= static_fn_type (decl
);
13878 cp_cv_quals quals
= type_memfn_quals (stype
);
13880 if (quals
!= TYPE_UNQUALIFIED
)
13881 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
13883 TREE_TYPE (decl
) = stype
;
13885 if (DECL_ARGUMENTS (decl
))
13886 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
13887 DECL_STATIC_FUNCTION_P (decl
) = 1;
13890 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13891 one of the language-independent trees. */
13893 enum cp_tree_node_structure_enum
13894 cp_tree_node_structure (union lang_tree_node
* t
)
13896 switch (TREE_CODE (&t
->generic
))
13898 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13899 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
13900 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13901 case OVERLOAD
: return TS_CP_OVERLOAD
;
13902 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13903 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13904 case BASELINK
: return TS_CP_BASELINK
;
13905 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13906 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13907 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13908 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13909 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13910 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
13911 default: return TS_CP_GENERIC
;
13915 /* Build the void_list_node (void_type_node having been created). */
13917 build_void_list_node (void)
13919 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13924 cp_missing_noreturn_ok_p (tree decl
)
13926 /* A missing noreturn is ok for the `main' function. */
13927 return DECL_MAIN_P (decl
);
13930 /* Return the COMDAT group into which DECL should be placed. */
13933 cxx_comdat_group (tree decl
)
13937 /* Virtual tables, construction virtual tables, and virtual table
13938 tables all go in a single COMDAT group, named after the primary
13940 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13941 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
13942 /* For all other DECLs, the COMDAT group is the mangled name of the
13943 declaration itself. */
13946 while (DECL_THUNK_P (decl
))
13948 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13949 into the same section as the target function. In that case
13950 we must return target's name. */
13951 tree target
= THUNK_TARGET (decl
);
13952 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
13953 && DECL_SECTION_NAME (target
) != NULL
13954 && DECL_ONE_ONLY (target
))
13959 name
= DECL_ASSEMBLER_NAME (decl
);
13965 #include "gt-cp-decl.h"