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
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"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
57 static tree
grokparms (cp_parameter_declarator
*, tree
*);
58 static const char *redeclaration_error_message (tree
, tree
);
60 static int decl_jump_unsafe (tree
);
61 static void require_complete_types_for_parms (tree
);
62 static int ambi_op_p (enum tree_code
);
63 static int unary_op_p (enum tree_code
);
64 static void push_local_name (tree
);
65 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
66 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
68 static void record_unknown_type (tree
, const char *);
69 static tree
builtin_function_1 (tree
, tree
);
70 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
71 static int member_function_or_else (tree
, tree
, enum overload_flags
);
72 static void bad_specifiers (tree
, const char *, int, int, int, int,
74 static void check_for_uninitialized_const_var (tree
);
75 static hashval_t
typename_hash (const void *);
76 static int typename_compare (const void *, const void *);
77 static tree
local_variable_p_walkfn (tree
*, int *, void *);
78 static tree
record_builtin_java_type (const char *, int);
79 static const char *tag_name (enum tag_types
);
80 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
81 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
82 static void maybe_deduce_size_from_array_init (tree
, tree
);
83 static void layout_var_decl (tree
);
84 static void maybe_commonize_var (tree
);
85 static tree
check_initializer (tree
, tree
, int, tree
*);
86 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
87 static void save_function_data (tree
);
88 static void check_function_type (tree
, tree
);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree
create_array_type_for_decl (tree
, tree
, tree
);
93 static tree
get_atexit_node (void);
94 static tree
get_dso_handle_node (void);
95 static tree
start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree
cp_make_fname_decl (tree
, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind
, tree
, tree
);
101 static tree
push_cp_library_fn (enum tree_code
, tree
);
102 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
103 static void store_parm_decls (tree
);
104 static void initialize_local_var (tree
, tree
);
105 static void expand_static_init (tree
, tree
);
106 static tree
next_initializable_field (tree
);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees
[CPTI_MAX
];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node
;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name
;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates
;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node
, integer_three_node
;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct named_label_use_entry
GTY(())
174 struct named_label_use_entry
*next
;
175 /* The binding level to which this entry is *currently* attached.
176 This is initially the binding level in which the goto appeared,
177 but is modified as scopes are closed. */
178 struct cp_binding_level
*binding_level
;
179 /* The head of the names list that was current when the goto appeared,
180 or the inner scope popped. These are the decls that will *not* be
181 skipped when jumping to the label. */
183 /* The location of the goto, for error reporting. */
184 location_t o_goto_locus
;
185 /* True if an OpenMP structured block scope has been closed since
186 the goto appeared. This means that the branch from the label will
187 illegally exit an OpenMP scope. */
191 /* A list of all LABEL_DECLs in the function that have names. Here so
192 we can clear out their names' definitions at the end of the
193 function, and so we can check the validity of jumps to these labels. */
195 struct named_label_entry
GTY(())
197 /* The decl itself. */
200 /* The binding level to which the label is *currently* attached.
201 This is initially set to the binding level in which the label
202 is defined, but is modified as scopes are closed. */
203 struct cp_binding_level
*binding_level
;
204 /* The head of the names list that was current when the label was
205 defined, or the inner scope popped. These are the decls that will
206 be skipped when jumping to the label. */
208 /* A tree list of all decls from all binding levels that would be
209 crossed by a backward branch to the label. */
212 /* A list of uses of the label, before the label is defined. */
213 struct named_label_use_entry
*uses
;
215 /* The following bits are set after the label is defined, and are
216 updated as scopes are popped. They indicate that a backward jump
217 to the label will illegally enter a scope of the given flavor. */
223 #define named_labels cp_function_chain->x_named_labels
225 /* The number of function bodies which we are currently processing.
226 (Zero if we are at namespace scope, one inside the body of a
227 function, two inside the body of a function in a local class, etc.) */
230 /* States indicating how grokdeclarator() should handle declspecs marked
231 with __attribute__((deprecated)). An object declared as
232 __attribute__((deprecated)) suppresses warnings of uses of other
235 enum deprecated_states
{
240 static enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
243 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
244 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
245 time the VAR_DECL was declared, the type was incomplete. */
247 static GTY(()) tree incomplete_vars
;
249 /* Returns the kind of template specialization we are currently
250 processing, given that it's declaration contained N_CLASS_SCOPES
251 explicit scope qualifications. */
254 current_tmpl_spec_kind (int n_class_scopes
)
256 int n_template_parm_scopes
= 0;
257 int seen_specialization_p
= 0;
258 int innermost_specialization_p
= 0;
259 struct cp_binding_level
*b
;
261 /* Scan through the template parameter scopes. */
262 for (b
= current_binding_level
;
263 b
->kind
== sk_template_parms
;
266 /* If we see a specialization scope inside a parameter scope,
267 then something is wrong. That corresponds to a declaration
270 template <class T> template <> ...
272 which is always invalid since [temp.expl.spec] forbids the
273 specialization of a class member template if the enclosing
274 class templates are not explicitly specialized as well. */
275 if (b
->explicit_spec_p
)
277 if (n_template_parm_scopes
== 0)
278 innermost_specialization_p
= 1;
280 seen_specialization_p
= 1;
282 else if (seen_specialization_p
== 1)
283 return tsk_invalid_member_spec
;
285 ++n_template_parm_scopes
;
288 /* Handle explicit instantiations. */
289 if (processing_explicit_instantiation
)
291 if (n_template_parm_scopes
!= 0)
292 /* We've seen a template parameter list during an explicit
293 instantiation. For example:
295 template <class T> template void f(int);
297 This is erroneous. */
298 return tsk_invalid_expl_inst
;
300 return tsk_expl_inst
;
303 if (n_template_parm_scopes
< n_class_scopes
)
304 /* We've not seen enough template headers to match all the
305 specialized classes present. For example:
307 template <class T> void R<T>::S<T>::f(int);
309 This is invalid; there needs to be one set of template
310 parameters for each class. */
311 return tsk_insufficient_parms
;
312 else if (n_template_parm_scopes
== n_class_scopes
)
313 /* We're processing a non-template declaration (even though it may
314 be a member of a template class.) For example:
316 template <class T> void S<T>::f(int);
318 The `class T' maches the `S<T>', leaving no template headers
319 corresponding to the `f'. */
321 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
322 /* We've got too many template headers. For example:
324 template <> template <class T> void f (T);
326 There need to be more enclosing classes. */
327 return tsk_excessive_parms
;
329 /* This must be a template. It's of the form:
331 template <class T> template <class U> void S<T>::f(U);
333 This is a specialization if the innermost level was a
334 specialization; otherwise it's just a definition of the
336 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
339 /* Exit the current scope. */
347 /* When a label goes out of scope, check to see if that label was used
348 in a valid manner, and issue any appropriate warnings or errors. */
351 pop_label (tree label
, tree old_value
)
353 if (!processing_template_decl
)
355 if (DECL_INITIAL (label
) == NULL_TREE
)
359 error ("label %q+D used but not defined", label
);
360 #ifdef USE_MAPPED_LOCATION
361 location
= input_location
; /* FIXME want (input_filename, (line)0) */
363 location
.file
= input_filename
;
366 /* Avoid crashing later. */
367 define_label (location
, DECL_NAME (label
));
370 warn_for_unused_label (label
);
373 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
376 /* At the end of a function, all labels declared within the function
377 go out of scope. BLOCK is the top-level block for the
381 pop_labels_1 (void **slot
, void *data
)
383 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
384 tree block
= (tree
) data
;
386 pop_label (ent
->label_decl
, NULL_TREE
);
388 /* Put the labels into the "variables" of the top-level block,
389 so debugger can see them. */
390 TREE_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
391 BLOCK_VARS (block
) = ent
->label_decl
;
393 htab_clear_slot (named_labels
, slot
);
399 pop_labels (tree block
)
403 htab_traverse (named_labels
, pop_labels_1
, block
);
408 /* At the end of a block with local labels, restore the outer definition. */
411 pop_local_label (tree label
, tree old_value
)
413 struct named_label_entry dummy
;
416 pop_label (label
, old_value
);
418 dummy
.label_decl
= label
;
419 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
420 htab_clear_slot (named_labels
, slot
);
423 /* The following two routines are used to interface to Objective-C++.
424 The binding level is purposely treated as an opaque type. */
427 objc_get_current_scope (void)
429 return current_binding_level
;
432 /* The following routine is used by the NeXT-style SJLJ exceptions;
433 variables get marked 'volatile' so as to not be clobbered by
434 _setjmp()/_longjmp() calls. All variables in the current scope,
435 as well as parent scopes up to (but not including) ENCLOSING_BLK
436 shall be thusly marked. */
439 objc_mark_locals_volatile (void *enclosing_blk
)
441 struct cp_binding_level
*scope
;
443 for (scope
= current_binding_level
;
444 scope
&& scope
!= enclosing_blk
;
445 scope
= scope
->level_chain
)
449 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
450 objc_volatilize_decl (decl
);
452 /* Do not climb up past the current function. */
453 if (scope
->kind
== sk_function_parms
)
458 /* Update data for defined and undefined labels when leaving a scope. */
461 poplevel_named_label_1 (void **slot
, void *data
)
463 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
464 struct cp_binding_level
*bl
= (struct cp_binding_level
*) data
;
465 struct cp_binding_level
*obl
= bl
->level_chain
;
467 if (ent
->binding_level
== bl
)
471 for (decl
= ent
->names_in_scope
; decl
; decl
= TREE_CHAIN (decl
))
472 if (decl_jump_unsafe (decl
))
473 ent
->bad_decls
= tree_cons (NULL
, decl
, ent
->bad_decls
);
475 ent
->binding_level
= obl
;
476 ent
->names_in_scope
= obl
->names
;
480 ent
->in_try_scope
= true;
483 ent
->in_catch_scope
= true;
486 ent
->in_omp_scope
= true;
494 struct named_label_use_entry
*use
;
496 for (use
= ent
->uses
; use
; use
= use
->next
)
497 if (use
->binding_level
== bl
)
499 use
->binding_level
= obl
;
500 use
->names_in_scope
= obl
->names
;
501 if (bl
->kind
== sk_omp
)
502 use
->in_omp_scope
= true;
509 /* Exit a binding level.
510 Pop the level off, and restore the state of the identifier-decl mappings
511 that were in effect when this level was entered.
513 If KEEP == 1, this level had explicit declarations, so
514 and create a "block" (a BLOCK node) for the level
515 to record its declarations and subblocks for symbol table output.
517 If FUNCTIONBODY is nonzero, this level is the body of a function,
518 so create a block as if KEEP were set and also clear out all
521 If REVERSE is nonzero, reverse the order of decls before putting
522 them into the BLOCK. */
525 poplevel (int keep
, int reverse
, int functionbody
)
528 /* The chain of decls was accumulated in reverse order.
529 Put it into forward order, just for cleanliness. */
531 int tmp
= functionbody
;
532 int real_functionbody
;
536 int leaving_for_scope
;
539 timevar_push (TV_NAME_LOOKUP
);
544 gcc_assert (current_binding_level
->kind
!= sk_class
);
546 real_functionbody
= (current_binding_level
->kind
== sk_cleanup
547 ? ((functionbody
= 0), tmp
) : functionbody
);
548 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
550 gcc_assert (!VEC_length(cp_class_binding
,
551 current_binding_level
->class_shadowed
));
553 /* We used to use KEEP == 2 to indicate that the new block should go
554 at the beginning of the list of blocks at this binding level,
555 rather than the end. This hack is no longer used. */
556 gcc_assert (keep
== 0 || keep
== 1);
558 if (current_binding_level
->keep
)
561 /* Any uses of undefined labels, and any defined labels, now operate
562 under constraints of next binding contour. */
563 if (cfun
&& !functionbody
&& named_labels
)
564 htab_traverse (named_labels
, poplevel_named_label_1
,
565 current_binding_level
);
567 /* Get the decls in the order they were written.
568 Usually current_binding_level->names is in reverse order.
569 But parameter decls were previously put in forward order. */
572 current_binding_level
->names
573 = decls
= nreverse (current_binding_level
->names
);
575 decls
= current_binding_level
->names
;
577 /* If there were any declarations or structure tags in that level,
578 or if this level is a function body,
579 create a BLOCK to record them for the life of this function. */
581 if (keep
== 1 || functionbody
)
582 block
= make_node (BLOCK
);
583 if (block
!= NULL_TREE
)
585 BLOCK_VARS (block
) = decls
;
586 BLOCK_SUBBLOCKS (block
) = subblocks
;
589 /* In each subblock, record that this is its superior. */
591 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
592 BLOCK_SUPERCONTEXT (link
) = block
;
594 /* We still support the old for-scope rules, whereby the variables
595 in a for-init statement were in scope after the for-statement
596 ended. We only use the new rules if flag_new_for_scope is
599 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
601 /* Before we remove the declarations first check for unused variables. */
602 if (warn_unused_variable
603 && !processing_template_decl
)
604 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
605 if (TREE_CODE (decl
) == VAR_DECL
606 && ! TREE_USED (decl
)
607 && ! DECL_IN_SYSTEM_HEADER (decl
)
608 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
609 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
611 /* Remove declarations for all the DECLs in this level. */
612 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
614 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
617 tree name
= DECL_NAME (link
);
621 ob
= outer_binding (name
,
622 IDENTIFIER_BINDING (name
),
625 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
627 ns_binding
= NULL_TREE
;
629 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
630 /* We have something like:
635 and we are leaving the `for' scope. There's no reason to
636 keep the binding of the inner `i' in this case. */
637 pop_binding (name
, link
);
638 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
639 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
640 /* Here, we have something like:
648 We must pop the for-scope binding so we know what's a
649 type and what isn't. */
650 pop_binding (name
, link
);
653 /* Mark this VAR_DECL as dead so that we can tell we left it
654 there only for backward compatibility. */
655 DECL_DEAD_FOR_LOCAL (link
) = 1;
657 /* Keep track of what should have happened when we
658 popped the binding. */
661 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
662 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
665 /* Add it to the list of dead variables in the next
666 outermost binding to that we can remove these when we
667 leave that binding. */
668 current_binding_level
->level_chain
->dead_vars_from_for
669 = tree_cons (NULL_TREE
, link
,
670 current_binding_level
->level_chain
->
673 /* Although we don't pop the cxx_binding, we do clear
674 its SCOPE since the scope is going away now. */
675 IDENTIFIER_BINDING (name
)->scope
676 = current_binding_level
->level_chain
;
683 /* Remove the binding. */
686 if (TREE_CODE (decl
) == TREE_LIST
)
687 decl
= TREE_VALUE (decl
);
690 if (TREE_CODE (name
) == OVERLOAD
)
691 name
= OVL_FUNCTION (name
);
693 gcc_assert (DECL_P (name
));
694 pop_binding (DECL_NAME (name
), decl
);
698 /* Remove declarations for any `for' variables from inner scopes
699 that we kept around. */
700 for (link
= current_binding_level
->dead_vars_from_for
;
701 link
; link
= TREE_CHAIN (link
))
702 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
704 /* Restore the IDENTIFIER_TYPE_VALUEs. */
705 for (link
= current_binding_level
->type_shadowed
;
706 link
; link
= TREE_CHAIN (link
))
707 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
709 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
710 for (link
= current_binding_level
->shadowed_labels
;
712 link
= TREE_CHAIN (link
))
713 pop_local_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
715 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
716 list if a `using' declaration put them there. The debugging
717 back ends won't understand OVERLOAD, so we remove them here.
718 Because the BLOCK_VARS are (temporarily) shared with
719 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
720 popped all the bindings. */
725 for (d
= &BLOCK_VARS (block
); *d
; )
727 if (TREE_CODE (*d
) == TREE_LIST
)
728 *d
= TREE_CHAIN (*d
);
730 d
= &TREE_CHAIN (*d
);
734 /* If the level being exited is the top level of a function,
735 check over all the labels. */
738 /* Since this is the top level block of a function, the vars are
739 the function's parameters. Don't leave them in the BLOCK
740 because they are found in the FUNCTION_DECL instead. */
741 BLOCK_VARS (block
) = 0;
745 kind
= current_binding_level
->kind
;
746 if (kind
== sk_cleanup
)
750 /* If this is a temporary binding created for a cleanup, then we'll
751 have pushed a statement list level. Pop that, create a new
752 BIND_EXPR for the block, and insert it into the stream. */
753 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
754 stmt
= c_build_bind_expr (block
, stmt
);
761 /* The current function is being defined, so its DECL_INITIAL
762 should be error_mark_node. */
763 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
764 DECL_INITIAL (current_function_decl
) = block
;
767 current_binding_level
->blocks
768 = chainon (current_binding_level
->blocks
, block
);
770 /* If we did not make a block for the level just exited,
771 any blocks made for inner levels
772 (since they cannot be recorded as subblocks in that level)
773 must be carried forward so they will later become subblocks
774 of something else. */
776 current_binding_level
->blocks
777 = chainon (current_binding_level
->blocks
, subblocks
);
779 /* Each and every BLOCK node created here in `poplevel' is important
780 (e.g. for proper debugging information) so if we created one
781 earlier, mark it as "used". */
783 TREE_USED (block
) = 1;
785 /* All temporary bindings created for cleanups are popped silently. */
786 if (kind
== sk_cleanup
)
789 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
792 /* Insert BLOCK at the end of the list of subblocks of the
793 current binding level. This is used when a BIND_EXPR is expanded,
794 to handle the BLOCK node inside the BIND_EXPR. */
797 insert_block (tree block
)
799 TREE_USED (block
) = 1;
800 current_binding_level
->blocks
801 = chainon (current_binding_level
->blocks
, block
);
804 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
805 itself, calling F for each. The DATA is passed to F as well. */
808 walk_namespaces_r (tree
namespace, walk_namespaces_fn f
, void* data
)
811 tree current
= NAMESPACE_LEVEL (namespace)->namespaces
;
813 result
|= (*f
) (namespace, data
);
815 for (; current
; current
= TREE_CHAIN (current
))
816 result
|= walk_namespaces_r (current
, f
, data
);
821 /* Walk all the namespaces, calling F for each. The DATA is passed to
825 walk_namespaces (walk_namespaces_fn f
, void* data
)
827 return walk_namespaces_r (global_namespace
, f
, data
);
830 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
831 DATA is non-NULL, this is the last time we will call
832 wrapup_global_declarations for this NAMESPACE. */
835 wrapup_globals_for_namespace (tree
namespace, void* data
)
837 struct cp_binding_level
*level
= NAMESPACE_LEVEL (namespace);
838 VEC(tree
,gc
) *statics
= level
->static_decls
;
839 tree
*vec
= VEC_address (tree
, statics
);
840 int len
= VEC_length (tree
, statics
);
841 int last_time
= (data
!= 0);
845 check_global_declarations (vec
, len
);
846 emit_debug_global_declarations (vec
, len
);
850 /* Write out any globals that need to be output. */
851 return wrapup_global_declarations (vec
, len
);
855 /* In C++, you don't have to write `struct S' to refer to `S'; you
856 can just use `S'. We accomplish this by creating a TYPE_DECL as
857 if the user had written `typedef struct S S'. Create and return
858 the TYPE_DECL for TYPE. */
861 create_implicit_typedef (tree name
, tree type
)
865 decl
= build_decl (TYPE_DECL
, name
, type
);
866 DECL_ARTIFICIAL (decl
) = 1;
867 /* There are other implicit type declarations, like the one *within*
868 a class that allows you to write `S::S'. We must distinguish
870 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
871 TYPE_NAME (type
) = decl
;
876 /* Remember a local name for name-mangling purposes. */
879 push_local_name (tree decl
)
884 timevar_push (TV_NAME_LOOKUP
);
886 name
= DECL_NAME (decl
);
888 nelts
= VEC_length (tree
, local_names
);
889 for (i
= 0; i
< nelts
; i
++)
891 t
= VEC_index (tree
, local_names
, i
);
892 if (DECL_NAME (t
) == name
)
894 if (!DECL_LANG_SPECIFIC (decl
))
895 retrofit_lang_decl (decl
);
896 DECL_LANG_SPECIFIC (decl
)->decl_flags
.u2sel
= 1;
897 if (DECL_LANG_SPECIFIC (t
))
898 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
900 DECL_DISCRIMINATOR (decl
) = 1;
902 VEC_replace (tree
, local_names
, i
, decl
);
903 timevar_pop (TV_NAME_LOOKUP
);
908 VEC_safe_push (tree
, gc
, local_names
, decl
);
909 timevar_pop (TV_NAME_LOOKUP
);
912 /* Subroutine of duplicate_decls: return truthvalue of whether
913 or not types of these decls match.
915 For C++, we must compare the parameter list so that `int' can match
916 `int&' in a parameter position, but `int&' is not confused with
920 decls_match (tree newdecl
, tree olddecl
)
924 if (newdecl
== olddecl
)
927 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
928 /* If the two DECLs are not even the same kind of thing, we're not
929 interested in their types. */
932 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
934 tree f1
= TREE_TYPE (newdecl
);
935 tree f2
= TREE_TYPE (olddecl
);
936 tree p1
= TYPE_ARG_TYPES (f1
);
937 tree p2
= TYPE_ARG_TYPES (f2
);
939 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
940 && ! (DECL_EXTERN_C_P (newdecl
)
941 && DECL_EXTERN_C_P (olddecl
)))
944 if (TREE_CODE (f1
) != TREE_CODE (f2
))
947 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
949 if (p2
== NULL_TREE
&& DECL_EXTERN_C_P (olddecl
)
950 && (DECL_BUILT_IN (olddecl
)
951 #ifndef NO_IMPLICIT_EXTERN_C
952 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
953 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
957 types_match
= self_promoting_args_p (p1
);
958 if (p1
== void_list_node
)
959 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
961 #ifndef NO_IMPLICIT_EXTERN_C
962 else if (p1
== NULL_TREE
963 && (DECL_EXTERN_C_P (olddecl
)
964 && DECL_IN_SYSTEM_HEADER (olddecl
)
965 && !DECL_CLASS_SCOPE_P (olddecl
))
966 && (DECL_EXTERN_C_P (newdecl
)
967 && DECL_IN_SYSTEM_HEADER (newdecl
)
968 && !DECL_CLASS_SCOPE_P (newdecl
)))
970 types_match
= self_promoting_args_p (p2
);
971 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
975 types_match
= compparms (p1
, p2
);
980 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
982 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
983 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
986 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
987 DECL_TEMPLATE_PARMS (olddecl
)))
990 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
991 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
992 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
994 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
995 DECL_TEMPLATE_RESULT (newdecl
));
999 /* Need to check scope for variable declaration (VAR_DECL).
1000 For typedef (TYPE_DECL), scope is ignored. */
1001 if (TREE_CODE (newdecl
) == VAR_DECL
1002 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1004 Two declarations for an object with C language linkage
1005 with the same name (ignoring the namespace that qualify
1006 it) that appear in different namespace scopes refer to
1008 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1011 if (TREE_TYPE (newdecl
) == error_mark_node
)
1012 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1013 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1014 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1015 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1018 types_match
= comptypes (TREE_TYPE (newdecl
),
1019 TREE_TYPE (olddecl
),
1020 COMPARE_REDECLARATION
);
1026 /* If NEWDECL is `static' and an `extern' was seen previously,
1027 warn about it. OLDDECL is the previous declaration.
1029 Note that this does not apply to the C++ case of declaring
1030 a variable `extern const' and then later `const'.
1032 Don't complain about built-in functions, since they are beyond
1033 the user's control. */
1036 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1040 if (TREE_CODE (newdecl
) == TYPE_DECL
1041 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1042 || TREE_CODE (newdecl
) == CONST_DECL
1043 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1046 /* Don't get confused by static member functions; that's a different
1048 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1049 && DECL_STATIC_FUNCTION_P (newdecl
))
1052 /* If the old declaration was `static', or the new one isn't, then
1053 then everything is OK. */
1054 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1057 /* It's OK to declare a builtin function as `static'. */
1058 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1059 && DECL_ARTIFICIAL (olddecl
))
1062 name
= DECL_ASSEMBLER_NAME (newdecl
);
1063 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl
);
1064 pedwarn ("previous declaration of %q+D", olddecl
);
1067 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1068 function templates. If their exception specifications do not
1069 match, issue a diagnostic. */
1072 check_redeclaration_exception_specification (tree new_decl
,
1077 tree new_exceptions
;
1078 tree old_exceptions
;
1080 new_type
= TREE_TYPE (new_decl
);
1081 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1082 old_type
= TREE_TYPE (old_decl
);
1083 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1087 If any declaration of a function has an exception-specification,
1088 all declarations, including the definition and an explicit
1089 specialization, of that function shall have an
1090 exception-specification with the same set of type-ids. */
1091 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1092 && ! DECL_IS_BUILTIN (old_decl
)
1094 && !comp_except_specs (new_exceptions
, old_exceptions
,
1097 error ("declaration of %qF throws different exceptions", new_decl
);
1098 error ("from previous declaration %q+F", old_decl
);
1102 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1103 && lookup_attribute ("gnu_inline", \
1104 DECL_ATTRIBUTES (fn)))
1106 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1107 If the redeclaration is invalid, a diagnostic is issued, and the
1108 error_mark_node is returned. Otherwise, OLDDECL is returned.
1110 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1113 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1116 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1118 unsigned olddecl_uid
= DECL_UID (olddecl
);
1119 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1120 int new_defines_function
= 0;
1123 if (newdecl
== olddecl
)
1126 types_match
= decls_match (newdecl
, olddecl
);
1128 /* If either the type of the new decl or the type of the old decl is an
1129 error_mark_node, then that implies that we have already issued an
1130 error (earlier) for some bogus type specification, and in that case,
1131 it is rather pointless to harass the user with yet more error message
1132 about the same declaration, so just pretend the types match here. */
1133 if (TREE_TYPE (newdecl
) == error_mark_node
1134 || TREE_TYPE (olddecl
) == error_mark_node
)
1135 return error_mark_node
;
1137 if (DECL_P (olddecl
)
1138 && TREE_CODE (newdecl
) == FUNCTION_DECL
1139 && TREE_CODE (olddecl
) == FUNCTION_DECL
1140 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1142 if (DECL_DECLARED_INLINE_P (newdecl
)
1143 && DECL_UNINLINABLE (newdecl
)
1144 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1145 /* Already warned elsewhere. */;
1146 else if (DECL_DECLARED_INLINE_P (olddecl
)
1147 && DECL_UNINLINABLE (olddecl
)
1148 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1149 /* Already warned. */;
1150 else if (DECL_DECLARED_INLINE_P (newdecl
)
1151 && DECL_UNINLINABLE (olddecl
)
1152 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1154 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1156 warning (OPT_Wattributes
, "previous declaration of %q+D "
1157 "with attribute noinline", olddecl
);
1159 else if (DECL_DECLARED_INLINE_P (olddecl
)
1160 && DECL_UNINLINABLE (newdecl
)
1161 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1163 warning (OPT_Wattributes
, "function %q+D redeclared with "
1164 "attribute noinline", newdecl
);
1165 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1170 /* Check for redeclaration and other discrepancies. */
1171 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1172 && DECL_ARTIFICIAL (olddecl
))
1174 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1175 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1177 /* Avoid warnings redeclaring built-ins which have not been
1178 explicitly declared. */
1179 if (DECL_ANTICIPATED (olddecl
))
1182 /* If you declare a built-in or predefined function name as static,
1183 the old definition is overridden, but optionally warn this was a
1184 bad choice of name. */
1185 if (! TREE_PUBLIC (newdecl
))
1187 warning (OPT_Wshadow
, "shadowing %s function %q#D",
1188 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1190 /* Discard the old built-in function. */
1193 /* If the built-in is not ansi, then programs can override
1194 it even globally without an error. */
1195 else if (! DECL_BUILT_IN (olddecl
))
1196 warning (0, "library function %q#D redeclared as non-function %q#D",
1200 error ("declaration of %q#D", newdecl
);
1201 error ("conflicts with built-in declaration %q#D",
1206 else if (!types_match
)
1208 /* Avoid warnings redeclaring built-ins which have not been
1209 explicitly declared. */
1210 if (DECL_ANTICIPATED (olddecl
))
1212 /* Deal with fileptr_type_node. FILE type is not known
1213 at the time we create the builtins. */
1216 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1217 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1219 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1222 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1224 tree t
= TREE_VALUE (t1
);
1226 if (TREE_CODE (t
) == POINTER_TYPE
1227 && TYPE_NAME (TREE_TYPE (t
))
1228 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1229 == get_identifier ("FILE")
1230 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1232 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1234 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1235 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1236 types_match
= decls_match (newdecl
, olddecl
);
1238 return duplicate_decls (newdecl
, olddecl
,
1240 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1243 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1246 else if ((DECL_EXTERN_C_P (newdecl
)
1247 && DECL_EXTERN_C_P (olddecl
))
1248 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1249 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1251 /* A near match; override the builtin. */
1253 if (TREE_PUBLIC (newdecl
))
1255 warning (0, "new declaration %q#D", newdecl
);
1256 warning (0, "ambiguates built-in declaration %q#D",
1260 warning (OPT_Wshadow
, "shadowing %s function %q#D",
1261 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1265 /* Discard the old built-in function. */
1268 /* Replace the old RTL to avoid problems with inlining. */
1269 COPY_DECL_RTL (newdecl
, olddecl
);
1271 /* Even if the types match, prefer the new declarations type for
1272 built-ins which have not been explicitly declared, for
1273 exception lists, etc... */
1274 else if (DECL_ANTICIPATED (olddecl
))
1276 tree type
= TREE_TYPE (newdecl
);
1277 tree attribs
= (*targetm
.merge_type_attributes
)
1278 (TREE_TYPE (olddecl
), type
);
1280 type
= cp_build_type_attribute_variant (type
, attribs
);
1281 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1284 /* If a function is explicitly declared "throw ()", propagate that to
1285 the corresponding builtin. */
1286 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1287 && DECL_ANTICIPATED (olddecl
)
1288 && TREE_NOTHROW (newdecl
)
1289 && !TREE_NOTHROW (olddecl
)
1290 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != NULL_TREE
1291 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != olddecl
1293 TREE_NOTHROW (built_in_decls
[DECL_FUNCTION_CODE (olddecl
)]) = 1;
1295 /* Whether or not the builtin can throw exceptions has no
1296 bearing on this declarator. */
1297 TREE_NOTHROW (olddecl
) = 0;
1299 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1301 /* If a builtin function is redeclared as `static', merge
1302 the declarations, but make the original one static. */
1303 DECL_THIS_STATIC (olddecl
) = 1;
1304 TREE_PUBLIC (olddecl
) = 0;
1306 /* Make the old declaration consistent with the new one so
1307 that all remnants of the builtin-ness of this function
1308 will be banished. */
1309 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1310 COPY_DECL_RTL (newdecl
, olddecl
);
1313 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1315 /* C++ Standard, 3.3, clause 4:
1316 "[Note: a namespace name or a class template name must be unique
1317 in its declarative region (7.3.2, clause 14). ]" */
1318 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1319 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1320 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1321 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1322 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1323 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1325 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1326 && TREE_CODE (newdecl
) != TYPE_DECL
)
1327 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1328 && TREE_CODE (olddecl
) != TYPE_DECL
))
1330 /* We do nothing special here, because C++ does such nasty
1331 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1332 get shadowed, and know that if we need to find a TYPE_DECL
1333 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1334 slot of the identifier. */
1338 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1339 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1340 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1341 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1345 error ("%q#D redeclared as different kind of symbol", newdecl
);
1346 if (TREE_CODE (olddecl
) == TREE_LIST
)
1347 olddecl
= TREE_VALUE (olddecl
);
1348 error ("previous declaration of %q+#D", olddecl
);
1350 return error_mark_node
;
1352 else if (!types_match
)
1354 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1355 /* These are certainly not duplicate declarations; they're
1356 from different scopes. */
1359 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1361 /* The name of a class template may not be declared to refer to
1362 any other template, class, function, object, namespace, value,
1363 or type in the same scope. */
1364 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1365 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1367 error ("declaration of template %q#D", newdecl
);
1368 error ("conflicts with previous declaration %q+#D", olddecl
);
1370 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1371 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1372 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1373 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1374 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1375 DECL_TEMPLATE_PARMS (olddecl
))
1376 /* Template functions can be disambiguated by
1378 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1379 TREE_TYPE (TREE_TYPE (olddecl
))))
1381 error ("new declaration %q#D", newdecl
);
1382 error ("ambiguates old declaration %q+#D", olddecl
);
1386 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1388 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1390 error ("declaration of C function %q#D conflicts with",
1392 error ("previous declaration %q+#D here", olddecl
);
1394 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1395 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1397 error ("new declaration %q#D", newdecl
);
1398 error ("ambiguates old declaration %q+#D", olddecl
);
1399 return error_mark_node
;
1406 error ("conflicting declaration %q#D", newdecl
);
1407 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1408 return error_mark_node
;
1411 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1412 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1413 && (!DECL_TEMPLATE_INFO (newdecl
)
1414 || (DECL_TI_TEMPLATE (newdecl
)
1415 != DECL_TI_TEMPLATE (olddecl
))))
1416 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1417 && (!DECL_TEMPLATE_INFO (olddecl
)
1418 || (DECL_TI_TEMPLATE (olddecl
)
1419 != DECL_TI_TEMPLATE (newdecl
))))))
1420 /* It's OK to have a template specialization and a non-template
1421 with the same type, or to have specializations of two
1422 different templates with the same type. Note that if one is a
1423 specialization, and the other is an instantiation of the same
1424 template, that we do not exit at this point. That situation
1425 can occur if we instantiate a template class, and then
1426 specialize one of its methods. This situation is valid, but
1427 the declarations must be merged in the usual way. */
1429 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1430 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1431 && !DECL_USE_TEMPLATE (newdecl
))
1432 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1433 && !DECL_USE_TEMPLATE (olddecl
))))
1434 /* One of the declarations is a template instantiation, and the
1435 other is not a template at all. That's OK. */
1437 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1439 /* In [namespace.alias] we have:
1441 In a declarative region, a namespace-alias-definition can be
1442 used to redefine a namespace-alias declared in that declarative
1443 region to refer only to the namespace to which it already
1446 Therefore, if we encounter a second alias directive for the same
1447 alias, we can just ignore the second directive. */
1448 if (DECL_NAMESPACE_ALIAS (newdecl
)
1449 && (DECL_NAMESPACE_ALIAS (newdecl
)
1450 == DECL_NAMESPACE_ALIAS (olddecl
)))
1452 /* [namespace.alias]
1454 A namespace-name or namespace-alias shall not be declared as
1455 the name of any other entity in the same declarative region.
1456 A namespace-name defined at global scope shall not be
1457 declared as the name of any other entity in any global scope
1459 error ("declaration of namespace %qD conflicts with", newdecl
);
1460 error ("previous declaration of namespace %q+D here", olddecl
);
1461 return error_mark_node
;
1465 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1468 error (errmsg
, newdecl
);
1469 if (DECL_NAME (olddecl
) != NULL_TREE
)
1470 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1471 ? "%q+#D previously defined here"
1472 : "%q+#D previously declared here", olddecl
);
1473 return error_mark_node
;
1475 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1476 && DECL_INITIAL (olddecl
) != NULL_TREE
1477 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1478 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1480 /* Prototype decl follows defn w/o prototype. */
1481 warning (0, "prototype for %q+#D", newdecl
);
1482 warning (0, "%Jfollows non-prototype definition here", olddecl
);
1484 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1485 || TREE_CODE (olddecl
) == VAR_DECL
)
1486 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1489 If two declarations of the same function or object
1490 specify different linkage-specifications ..., the program
1491 is ill-formed.... Except for functions with C++ linkage,
1492 a function declaration without a linkage specification
1493 shall not precede the first linkage specification for
1494 that function. A function can be declared without a
1495 linkage specification after an explicit linkage
1496 specification has been seen; the linkage explicitly
1497 specified in the earlier declaration is not affected by
1498 such a function declaration.
1500 DR 563 raises the question why the restrictions on
1501 functions should not also apply to objects. Older
1502 versions of G++ silently ignore the linkage-specification
1510 which is clearly wrong. Therefore, we now treat objects
1512 if (current_lang_depth () == 0)
1514 /* There is no explicit linkage-specification, so we use
1515 the linkage from the previous declaration. */
1516 if (!DECL_LANG_SPECIFIC (newdecl
))
1517 retrofit_lang_decl (newdecl
);
1518 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1522 error ("previous declaration of %q+#D with %qL linkage",
1523 olddecl
, DECL_LANGUAGE (olddecl
));
1524 error ("conflicts with new declaration with %qL linkage",
1525 DECL_LANGUAGE (newdecl
));
1529 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1531 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1533 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1534 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1537 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1538 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1540 for (; t1
&& t1
!= void_list_node
;
1541 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1542 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1544 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1547 pedwarn ("default argument given for parameter %d of %q#D",
1549 pedwarn ("after previous specification in %q+#D", olddecl
);
1553 error ("default argument given for parameter %d of %q#D",
1555 error ("after previous specification in %q+#D",
1560 if (DECL_DECLARED_INLINE_P (newdecl
)
1561 && ! DECL_DECLARED_INLINE_P (olddecl
)
1562 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1564 warning (0, "%q#D was used before it was declared inline", newdecl
);
1565 warning (0, "%Jprevious non-inline declaration here", olddecl
);
1570 /* Do not merge an implicit typedef with an explicit one. In:
1574 typedef class A A __attribute__ ((foo));
1576 the attribute should apply only to the typedef. */
1577 if (TREE_CODE (olddecl
) == TYPE_DECL
1578 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1579 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1582 /* If new decl is `static' and an `extern' was seen previously,
1584 warn_extern_redeclared_static (newdecl
, olddecl
);
1586 /* We have committed to returning 1 at this point. */
1587 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1589 /* Now that functions must hold information normally held
1590 by field decls, there is extra work to do so that
1591 declaration information does not get destroyed during
1593 if (DECL_VINDEX (olddecl
))
1594 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1595 if (DECL_CONTEXT (olddecl
))
1596 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1597 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1598 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1599 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1600 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1601 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1602 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1603 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1604 SET_OVERLOADED_OPERATOR_CODE
1605 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1606 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1608 /* Optionally warn about more than one declaration for the same
1609 name, but don't warn about a function declaration followed by a
1611 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1612 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1613 /* Don't warn about extern decl followed by definition. */
1614 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1615 /* Don't warn about friends, let add_friend take care of it. */
1616 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
)))
1618 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1619 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1623 /* Deal with C++: must preserve virtual function table size. */
1624 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1626 tree newtype
= TREE_TYPE (newdecl
);
1627 tree oldtype
= TREE_TYPE (olddecl
);
1629 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1630 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1631 CLASSTYPE_FRIEND_CLASSES (newtype
)
1632 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1634 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1637 /* Copy all the DECL_... slots specified in the new decl
1638 except for any that we copy here from the old type. */
1639 DECL_ATTRIBUTES (newdecl
)
1640 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1642 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1646 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1647 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1648 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1649 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1650 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1651 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1653 DECL_ATTRIBUTES (old_result
)
1654 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1656 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1658 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1659 && DECL_INITIAL (new_result
))
1661 if (DECL_INITIAL (old_result
))
1663 DECL_INLINE (old_result
) = 0;
1664 DECL_UNINLINABLE (old_result
) = 1;
1668 DECL_INLINE (old_result
) = DECL_INLINE (new_result
);
1669 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1671 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1672 DECL_NOT_REALLY_EXTERN (old_result
)
1673 = DECL_NOT_REALLY_EXTERN (new_result
);
1674 DECL_INTERFACE_KNOWN (old_result
)
1675 = DECL_INTERFACE_KNOWN (new_result
);
1676 DECL_DECLARED_INLINE_P (old_result
)
1677 = DECL_DECLARED_INLINE_P (new_result
);
1681 DECL_INLINE (old_result
)
1682 |= DECL_INLINE (new_result
);
1683 DECL_DECLARED_INLINE_P (old_result
)
1684 |= DECL_DECLARED_INLINE_P (new_result
);
1685 check_redeclaration_exception_specification (newdecl
, olddecl
);
1689 /* If the new declaration is a definition, update the file and
1690 line information on the declaration, and also make
1691 the old declaration the same definition. */
1692 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1694 DECL_SOURCE_LOCATION (olddecl
)
1695 = DECL_SOURCE_LOCATION (old_result
)
1696 = DECL_SOURCE_LOCATION (newdecl
);
1697 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1698 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1699 DECL_ARGUMENTS (old_result
)
1700 = DECL_ARGUMENTS (new_result
);
1708 /* Automatically handles default parameters. */
1709 tree oldtype
= TREE_TYPE (olddecl
);
1712 /* Merge the data types specified in the two decls. */
1713 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1715 /* If merge_types produces a non-typedef type, just use the old type. */
1716 if (TREE_CODE (newdecl
) == TYPE_DECL
1717 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1720 if (TREE_CODE (newdecl
) == VAR_DECL
)
1722 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1723 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1724 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1725 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1726 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1727 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1729 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1730 if (DECL_LANG_SPECIFIC (olddecl
)
1731 && CP_DECL_THREADPRIVATE_P (olddecl
))
1733 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1734 if (!DECL_LANG_SPECIFIC (newdecl
))
1735 retrofit_lang_decl (newdecl
);
1737 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1738 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1742 /* Do this after calling `merge_types' so that default
1743 parameters don't confuse us. */
1744 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1745 check_redeclaration_exception_specification (newdecl
, olddecl
);
1746 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1748 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1749 check_default_args (newdecl
);
1751 /* Lay the type out, unless already done. */
1752 if (! same_type_p (newtype
, oldtype
)
1753 && TREE_TYPE (newdecl
) != error_mark_node
1754 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1755 layout_type (TREE_TYPE (newdecl
));
1757 if ((TREE_CODE (newdecl
) == VAR_DECL
1758 || TREE_CODE (newdecl
) == PARM_DECL
1759 || TREE_CODE (newdecl
) == RESULT_DECL
1760 || TREE_CODE (newdecl
) == FIELD_DECL
1761 || TREE_CODE (newdecl
) == TYPE_DECL
)
1762 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1763 layout_decl (newdecl
, 0);
1765 /* Merge the type qualifiers. */
1766 if (TREE_READONLY (newdecl
))
1767 TREE_READONLY (olddecl
) = 1;
1768 if (TREE_THIS_VOLATILE (newdecl
))
1769 TREE_THIS_VOLATILE (olddecl
) = 1;
1770 if (TREE_NOTHROW (newdecl
))
1771 TREE_NOTHROW (olddecl
) = 1;
1773 /* Merge deprecatedness. */
1774 if (TREE_DEPRECATED (newdecl
))
1775 TREE_DEPRECATED (olddecl
) = 1;
1777 /* Merge the initialization information. */
1778 if (DECL_INITIAL (newdecl
) == NULL_TREE
1779 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1781 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1782 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1783 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1784 && DECL_LANG_SPECIFIC (newdecl
)
1785 && DECL_LANG_SPECIFIC (olddecl
))
1787 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1788 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1792 /* Merge the section attribute.
1793 We want to issue an error if the sections conflict but that must be
1794 done later in decl_attributes since we are called before attributes
1796 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1797 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1799 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1801 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1802 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1803 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1804 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1805 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1806 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1807 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1808 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1809 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1810 /* Keep the old RTL. */
1811 COPY_DECL_RTL (olddecl
, newdecl
);
1813 else if (TREE_CODE (newdecl
) == VAR_DECL
1814 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1816 /* Keep the old RTL. We cannot keep the old RTL if the old
1817 declaration was for an incomplete object and the new
1818 declaration is not since many attributes of the RTL will
1820 COPY_DECL_RTL (olddecl
, newdecl
);
1823 /* If cannot merge, then use the new type and qualifiers,
1824 and don't preserve the old rtl. */
1827 /* Clean out any memory we had of the old declaration. */
1828 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1830 TREE_VALUE (oldstatic
) = error_mark_node
;
1832 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1833 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1834 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1835 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1838 /* Merge the storage class information. */
1839 merge_weak (newdecl
, olddecl
);
1841 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1842 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1843 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1844 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1845 if (! DECL_EXTERNAL (olddecl
))
1846 DECL_EXTERNAL (newdecl
) = 0;
1848 new_template
= NULL_TREE
;
1849 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1851 bool new_redefines_gnu_inline
= false;
1853 if (new_defines_function
1854 && ((DECL_INTERFACE_KNOWN (olddecl
)
1855 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1856 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1857 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1858 == FUNCTION_DECL
))))
1862 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1863 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1865 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1868 if (!new_redefines_gnu_inline
)
1870 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1871 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1872 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1874 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1875 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1877 /* If the OLDDECL is an instantiation and/or specialization,
1878 then the NEWDECL must be too. But, it may not yet be marked
1879 as such if the caller has created NEWDECL, but has not yet
1880 figured out that it is a redeclaration. */
1881 if (!DECL_USE_TEMPLATE (newdecl
))
1882 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
1884 /* Don't really know how much of the language-specific
1885 values we should copy from old to new. */
1886 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1887 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1888 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1889 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1890 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1891 if (DECL_TEMPLATE_INFO (newdecl
))
1892 new_template
= DECL_TI_TEMPLATE (newdecl
);
1893 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1894 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1895 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1896 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1897 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1898 && DECL_HIDDEN_FRIEND_P (olddecl
)
1899 && newdecl_is_friend
);
1901 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1902 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1903 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1905 DECL_BEFRIENDING_CLASSES (newdecl
)
1906 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1907 DECL_BEFRIENDING_CLASSES (olddecl
));
1908 /* DECL_THUNKS is only valid for virtual functions,
1909 otherwise it is a DECL_FRIEND_CONTEXT. */
1910 if (DECL_VIRTUAL_P (newdecl
))
1911 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1915 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1917 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1918 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1920 /* If newdecl is not a specialization, then it is not a
1921 template-related function at all. And that means that we
1922 should have exited above, returning 0. */
1923 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1925 if (TREE_USED (olddecl
))
1926 /* From [temp.expl.spec]:
1928 If a template, a member template or the member of a class
1929 template is explicitly specialized then that
1930 specialization shall be declared before the first use of
1931 that specialization that would cause an implicit
1932 instantiation to take place, in every translation unit in
1933 which such a use occurs. */
1934 error ("explicit specialization of %qD after first use",
1937 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1939 /* Don't propagate visibility from the template to the
1940 specialization here. We'll do that in determine_visibility if
1942 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
1944 /* [temp.expl.spec/14] We don't inline explicit specialization
1945 just because the primary template says so. */
1947 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
1949 /* C++ is always in in unit-at-a-time mode, so we never
1950 inline re-defined extern inline functions. */
1951 DECL_INLINE (newdecl
) = 0;
1952 DECL_UNINLINABLE (newdecl
) = 1;
1956 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1957 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1959 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1961 /* If either decl says `inline', this fn is inline, unless
1962 its definition was passed already. */
1963 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1964 DECL_INLINE (olddecl
) = 1;
1965 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1967 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1968 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1970 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
1971 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
1972 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
1973 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
1976 /* Preserve abstractness on cloned [cd]tors. */
1977 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1981 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1982 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1983 COPY_DECL_RTL (newdecl
, olddecl
);
1985 if (! types_match
|| new_defines_function
)
1987 /* These need to be copied so that the names are available.
1988 Note that if the types do match, we'll preserve inline
1989 info and other bits, but if not, we won't. */
1990 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1991 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1993 if (new_defines_function
)
1994 /* If defining a function declared with other language
1995 linkage, use the previously declared language linkage. */
1996 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1997 else if (types_match
)
1999 /* If redeclaring a builtin function, and not a definition,
2000 it stays built in. */
2001 if (DECL_BUILT_IN (olddecl
))
2003 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2004 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2005 /* If we're keeping the built-in definition, keep the rtl,
2006 regardless of declaration matches. */
2007 COPY_DECL_RTL (olddecl
, newdecl
);
2010 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2011 /* Don't clear out the arguments if we're redefining a function. */
2012 if (DECL_ARGUMENTS (olddecl
))
2013 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2016 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2017 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2019 /* Now preserve various other info from the definition. */
2020 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2021 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2022 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2023 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2025 /* Warn about conflicting visibility specifications. */
2026 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2027 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2028 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2030 warning (OPT_Wattributes
, "%q+D: visibility attribute ignored "
2031 "because it", newdecl
);
2032 warning (OPT_Wattributes
, "%Jconflicts with previous "
2033 "declaration here", olddecl
);
2035 /* Choose the declaration which specified visibility. */
2036 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2038 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2039 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2041 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2042 so keep this behavior. */
2043 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2045 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2046 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2049 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2050 with that from NEWDECL below. */
2051 if (DECL_LANG_SPECIFIC (olddecl
))
2053 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2054 != DECL_LANG_SPECIFIC (newdecl
));
2055 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2058 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2062 function_size
= sizeof (struct tree_decl_common
);
2064 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2065 (char *) newdecl
+ sizeof (struct tree_common
),
2066 function_size
- sizeof (struct tree_common
));
2068 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2069 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2070 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2072 /* If newdecl is a template instantiation, it is possible that
2073 the following sequence of events has occurred:
2075 o A friend function was declared in a class template. The
2076 class template was instantiated.
2078 o The instantiation of the friend declaration was
2079 recorded on the instantiation list, and is newdecl.
2081 o Later, however, instantiate_class_template called pushdecl
2082 on the newdecl to perform name injection. But, pushdecl in
2083 turn called duplicate_decls when it discovered that another
2084 declaration of a global function with the same name already
2087 o Here, in duplicate_decls, we decided to clobber newdecl.
2089 If we're going to do that, we'd better make sure that
2090 olddecl, and not newdecl, is on the list of
2091 instantiations so that if we try to do the instantiation
2092 again we won't get the clobbered declaration. */
2093 reregister_specialization (newdecl
,
2099 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2100 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2101 (char *) newdecl
+ sizeof (struct tree_common
),
2102 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2103 switch (TREE_CODE (olddecl
))
2113 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2114 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2115 size
- sizeof (struct tree_decl_common
)
2116 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2120 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2121 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2122 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2123 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2127 DECL_UID (olddecl
) = olddecl_uid
;
2129 DECL_FRIEND_P (olddecl
) = 1;
2132 DECL_ANTICIPATED (olddecl
) = 1;
2133 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2136 /* NEWDECL contains the merged attribute lists.
2137 Update OLDDECL to be the same. */
2138 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2140 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2141 so that encode_section_info has a chance to look at the new decl
2142 flags and attributes. */
2143 if (DECL_RTL_SET_P (olddecl
)
2144 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2145 || (TREE_CODE (olddecl
) == VAR_DECL
2146 && TREE_STATIC (olddecl
))))
2147 make_decl_rtl (olddecl
);
2149 /* The NEWDECL will no longer be needed. Because every out-of-class
2150 declaration of a member results in a call to duplicate_decls,
2151 freeing these nodes represents in a significant savings. */
2157 /* Return zero if the declaration NEWDECL is valid
2158 when the declaration OLDDECL (assumed to be for the same name)
2159 has already been seen.
2160 Otherwise return an error message format string with a %s
2161 where the identifier should go. */
2164 redeclaration_error_message (tree newdecl
, tree olddecl
)
2166 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2168 /* Because C++ can put things into name space for free,
2169 constructs like "typedef struct foo { ... } foo"
2170 would look like an erroneous redeclaration. */
2171 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2174 return "redefinition of %q#D";
2176 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2178 /* If this is a pure function, its olddecl will actually be
2179 the original initialization to `0' (which we force to call
2180 abort()). Don't complain about redefinition in this case. */
2181 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2182 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2185 /* If both functions come from different namespaces, this is not
2186 a redeclaration - this is a conflict with a used function. */
2187 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2188 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2189 && ! decls_match (olddecl
, newdecl
))
2190 return "%qD conflicts with used function";
2192 /* We'll complain about linkage mismatches in
2193 warn_extern_redeclared_static. */
2195 /* Defining the same name twice is no good. */
2196 if (DECL_INITIAL (olddecl
) != NULL_TREE
2197 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2199 if (DECL_NAME (olddecl
) == NULL_TREE
)
2200 return "%q#D not declared in class";
2201 else if (!GNU_INLINE_P (olddecl
)
2202 || GNU_INLINE_P (newdecl
))
2203 return "redefinition of %q#D";
2206 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2208 bool olda
= GNU_INLINE_P (olddecl
);
2209 bool newa
= GNU_INLINE_P (newdecl
);
2214 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2216 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2222 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2226 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2228 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2229 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2230 return "redefinition of %q#D";
2234 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2235 || (DECL_TEMPLATE_RESULT (newdecl
)
2236 == DECL_TEMPLATE_RESULT (olddecl
)))
2239 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2240 if (DECL_TEMPLATE_INFO (nt
))
2241 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2242 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2243 if (DECL_TEMPLATE_INFO (ot
))
2244 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2245 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2246 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2247 return "redefinition of %q#D";
2249 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2251 bool olda
= GNU_INLINE_P (ot
);
2252 bool newa
= GNU_INLINE_P (nt
);
2257 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2259 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2263 /* Core issue #226 (C++0x):
2265 If a friend function template declaration specifies a
2266 default template-argument, that declaration shall be a
2267 definition and shall be the only declaration of the
2268 function template in the translation unit. */
2269 if ((cxx_dialect
!= cxx98
)
2270 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2271 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2272 /*is_primary=*/1, /*is_partial=*/0,
2273 /*is_friend_decl=*/2))
2274 return "redeclaration of friend %q#D may not have default template arguments";
2278 else if (TREE_CODE (newdecl
) == VAR_DECL
2279 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2280 && (! DECL_LANG_SPECIFIC (olddecl
)
2281 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2282 || DECL_THREAD_LOCAL_P (newdecl
)))
2284 /* Only variables can be thread-local, and all declarations must
2285 agree on this property. */
2286 if (DECL_THREAD_LOCAL_P (newdecl
))
2287 return "thread-local declaration of %q#D follows "
2288 "non-thread-local declaration";
2290 return "non-thread-local declaration of %q#D follows "
2291 "thread-local declaration";
2293 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2295 /* The objects have been declared at namespace scope. If either
2296 is a member of an anonymous union, then this is an invalid
2297 redeclaration. For example:
2303 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2304 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2305 return "redeclaration of %q#D";
2306 /* If at least one declaration is a reference, there is no
2307 conflict. For example:
2313 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2315 /* Reject two definitions. */
2316 return "redefinition of %q#D";
2320 /* Objects declared with block scope: */
2321 /* Reject two definitions, and reject a definition
2322 together with an external reference. */
2323 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2324 return "redeclaration of %q#D";
2329 /* Hash and equality functions for the named_label table. */
2332 named_label_entry_hash (const void *data
)
2334 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2335 return DECL_UID (ent
->label_decl
);
2339 named_label_entry_eq (const void *a
, const void *b
)
2341 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2342 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2343 return ent_a
->label_decl
== ent_b
->label_decl
;
2346 /* Create a new label, named ID. */
2349 make_label_decl (tree id
, int local_p
)
2351 struct named_label_entry
*ent
;
2355 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
2357 DECL_CONTEXT (decl
) = current_function_decl
;
2358 DECL_MODE (decl
) = VOIDmode
;
2359 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2361 /* Say where one reference is to the label, for the sake of the
2362 error if it is not defined. */
2363 DECL_SOURCE_LOCATION (decl
) = input_location
;
2365 /* Record the fact that this identifier is bound to this label. */
2366 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2368 /* Create the label htab for the function on demand. */
2370 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2371 named_label_entry_eq
, NULL
);
2373 /* Record this label on the list of labels used in this function.
2374 We do this before calling make_label_decl so that we get the
2375 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2376 ent
= GGC_CNEW (struct named_label_entry
);
2377 ent
->label_decl
= decl
;
2379 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2380 gcc_assert (*slot
== NULL
);
2386 /* Look for a label named ID in the current function. If one cannot
2387 be found, create one. (We keep track of used, but undefined,
2388 labels, and complain about them at the end of a function.) */
2391 lookup_label (tree id
)
2395 timevar_push (TV_NAME_LOOKUP
);
2396 /* You can't use labels at global scope. */
2397 if (current_function_decl
== NULL_TREE
)
2399 error ("label %qE referenced outside of any function", id
);
2400 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2403 /* See if we've already got this label. */
2404 decl
= IDENTIFIER_LABEL_VALUE (id
);
2405 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2406 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2408 decl
= make_label_decl (id
, /*local_p=*/0);
2409 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2412 /* Declare a local label named ID. */
2415 declare_local_label (tree id
)
2419 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2420 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2421 shadow
= tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2422 current_binding_level
->shadowed_labels
);
2423 current_binding_level
->shadowed_labels
= shadow
;
2425 decl
= make_label_decl (id
, /*local_p=*/1);
2426 TREE_VALUE (shadow
) = decl
;
2431 /* Returns nonzero if it is ill-formed to jump past the declaration of
2432 DECL. Returns 2 if it's also a real problem. */
2435 decl_jump_unsafe (tree decl
)
2437 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2438 || TREE_TYPE (decl
) == error_mark_node
)
2441 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
2442 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2445 if (pod_type_p (TREE_TYPE (decl
)))
2448 /* The POD stuff is just pedantry; why should it matter if the class
2449 contains a field of pointer to member type? */
2453 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2456 identify_goto (tree decl
, const location_t
*locus
)
2459 pedwarn ("jump to label %qD", decl
);
2461 pedwarn ("jump to case label");
2463 pedwarn ("%H from here", locus
);
2466 /* Check that a single previously seen jump to a newly defined label
2467 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2468 the jump context; NAMES are the names in scope in LEVEL at the jump
2469 context; LOCUS is the source position of the jump or 0. Returns
2470 true if all is well. */
2473 check_previous_goto_1 (tree decl
, struct cp_binding_level
* level
, tree names
,
2474 bool exited_omp
, const location_t
*locus
)
2476 struct cp_binding_level
*b
;
2477 bool identified
= false, saw_eh
= false, saw_omp
= false;
2481 identify_goto (decl
, locus
);
2482 error (" exits OpenMP structured block");
2483 identified
= saw_omp
= true;
2486 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2488 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2490 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2491 new_decls
= TREE_CHAIN (new_decls
))
2493 int problem
= decl_jump_unsafe (new_decls
);
2499 identify_goto (decl
, locus
);
2503 error (" crosses initialization of %q+#D", new_decls
);
2505 pedwarn (" enters scope of non-POD %q+#D", new_decls
);
2510 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2514 identify_goto (decl
, locus
);
2517 if (b
->kind
== sk_try
)
2518 error (" enters try block");
2520 error (" enters catch block");
2523 if (b
->kind
== sk_omp
&& !saw_omp
)
2527 identify_goto (decl
, locus
);
2530 error (" enters OpenMP structured block");
2539 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2541 check_previous_goto_1 (decl
, use
->binding_level
,
2542 use
->names_in_scope
, use
->in_omp_scope
,
2543 &use
->o_goto_locus
);
2547 check_switch_goto (struct cp_binding_level
* level
)
2549 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2552 /* Check that a new jump to a label DECL is OK. Called by
2553 finish_goto_stmt. */
2556 check_goto (tree decl
)
2558 struct named_label_entry
*ent
, dummy
;
2559 bool saw_catch
= false, identified
= false;
2562 /* We can't know where a computed goto is jumping.
2563 So we assume that it's OK. */
2564 if (TREE_CODE (decl
) != LABEL_DECL
)
2567 /* We didn't record any information about this label when we created it,
2568 and there's not much point since it's trivial to analyze as a return. */
2569 if (decl
== cdtor_label
)
2572 dummy
.label_decl
= decl
;
2573 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2574 gcc_assert (ent
!= NULL
);
2576 /* If the label hasn't been defined yet, defer checking. */
2577 if (! DECL_INITIAL (decl
))
2579 struct named_label_use_entry
*new_use
;
2581 /* Don't bother creating another use if the last goto had the
2582 same data, and will therefore create the same set of errors. */
2584 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2587 new_use
= GGC_NEW (struct named_label_use_entry
);
2588 new_use
->binding_level
= current_binding_level
;
2589 new_use
->names_in_scope
= current_binding_level
->names
;
2590 new_use
->o_goto_locus
= input_location
;
2591 new_use
->in_omp_scope
= false;
2593 new_use
->next
= ent
->uses
;
2594 ent
->uses
= new_use
;
2598 if (ent
->in_try_scope
|| ent
->in_catch_scope
2599 || ent
->in_omp_scope
|| ent
->bad_decls
)
2601 pedwarn ("jump to label %q+D", decl
);
2602 pedwarn (" from here");
2606 for (bad
= ent
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2608 tree b
= TREE_VALUE (bad
);
2609 int u
= decl_jump_unsafe (b
);
2611 if (u
> 1 && DECL_ARTIFICIAL (b
))
2613 /* Can't skip init of __exception_info. */
2614 error ("%J enters catch block", b
);
2618 error (" skips initialization of %q+#D", b
);
2620 pedwarn (" enters scope of non-POD %q+#D", b
);
2623 if (ent
->in_try_scope
)
2624 error (" enters try block");
2625 else if (ent
->in_catch_scope
&& !saw_catch
)
2626 error (" enters catch block");
2628 if (ent
->in_omp_scope
)
2629 error (" enters OpenMP structured block");
2630 else if (flag_openmp
)
2632 struct cp_binding_level
*b
;
2633 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2635 if (b
== ent
->binding_level
)
2637 if (b
->kind
== sk_omp
)
2641 pedwarn ("jump to label %q+D", decl
);
2642 pedwarn (" from here");
2645 error (" exits OpenMP structured block");
2652 /* Check that a return is ok wrt OpenMP structured blocks.
2653 Called by finish_return_stmt. Returns true if all is well. */
2656 check_omp_return (void)
2658 struct cp_binding_level
*b
;
2659 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2660 if (b
->kind
== sk_omp
)
2662 error ("invalid exit from OpenMP structured block");
2668 /* Define a label, specifying the location in the source file.
2669 Return the LABEL_DECL node for the label. */
2672 define_label (location_t location
, tree name
)
2674 struct named_label_entry
*ent
, dummy
;
2675 struct cp_binding_level
*p
;
2678 timevar_push (TV_NAME_LOOKUP
);
2680 decl
= lookup_label (name
);
2682 dummy
.label_decl
= decl
;
2683 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2684 gcc_assert (ent
!= NULL
);
2686 /* After labels, make any new cleanups in the function go into their
2687 own new (temporary) binding contour. */
2688 for (p
= current_binding_level
;
2689 p
->kind
!= sk_function_parms
;
2691 p
->more_cleanups_ok
= 0;
2693 if (name
== get_identifier ("wchar_t"))
2694 pedwarn ("label named wchar_t");
2696 if (DECL_INITIAL (decl
) != NULL_TREE
)
2698 error ("duplicate label %qD", decl
);
2699 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
2703 struct named_label_use_entry
*use
;
2705 /* Mark label as having been defined. */
2706 DECL_INITIAL (decl
) = error_mark_node
;
2707 /* Say where in the source. */
2708 DECL_SOURCE_LOCATION (decl
) = location
;
2710 ent
->binding_level
= current_binding_level
;
2711 ent
->names_in_scope
= current_binding_level
->names
;
2713 for (use
= ent
->uses
; use
; use
= use
->next
)
2714 check_previous_goto (decl
, use
);
2718 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2723 struct cp_binding_level
*level
;
2724 struct cp_switch
*next
;
2725 /* The SWITCH_STMT being built. */
2727 /* A splay-tree mapping the low element of a case range to the high
2728 element, or NULL_TREE if there is no high element. Used to
2729 determine whether or not a new case label duplicates an old case
2730 label. We need a tree, rather than simply a hash table, because
2731 of the GNU case range extension. */
2735 /* A stack of the currently active switch statements. The innermost
2736 switch statement is on the top of the stack. There is no need to
2737 mark the stack for garbage collection because it is only active
2738 during the processing of the body of a function, and we never
2739 collect at that point. */
2741 static struct cp_switch
*switch_stack
;
2743 /* Called right after a switch-statement condition is parsed.
2744 SWITCH_STMT is the switch statement being parsed. */
2747 push_switch (tree switch_stmt
)
2749 struct cp_switch
*p
= XNEW (struct cp_switch
);
2750 p
->level
= current_binding_level
;
2751 p
->next
= switch_stack
;
2752 p
->switch_stmt
= switch_stmt
;
2753 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2760 struct cp_switch
*cs
= switch_stack
;
2761 location_t switch_location
;
2763 /* Emit warnings as needed. */
2764 if (EXPR_HAS_LOCATION (cs
->switch_stmt
))
2765 switch_location
= EXPR_LOCATION (cs
->switch_stmt
);
2767 switch_location
= input_location
;
2768 if (!processing_template_decl
)
2769 c_do_switch_warnings (cs
->cases
, switch_location
,
2770 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2771 SWITCH_STMT_COND (cs
->switch_stmt
));
2773 splay_tree_delete (cs
->cases
);
2774 switch_stack
= switch_stack
->next
;
2778 /* Note that we've seen a definition of a case label, and complain if this
2779 is a bad place for one. */
2782 finish_case_label (tree low_value
, tree high_value
)
2785 struct cp_binding_level
*p
;
2787 if (processing_template_decl
)
2791 /* For templates, just add the case label; we'll do semantic
2792 analysis at instantiation-time. */
2793 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2794 return add_stmt (build_case_label (low_value
, high_value
, label
));
2797 /* Find the condition on which this switch statement depends. */
2798 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
2799 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2800 cond
= TREE_VALUE (cond
);
2802 if (!check_switch_goto (switch_stack
->level
))
2803 return error_mark_node
;
2805 r
= c_add_case_label (switch_stack
->cases
, cond
, TREE_TYPE (cond
),
2806 low_value
, high_value
);
2808 /* After labels, make any new cleanups in the function go into their
2809 own new (temporary) binding contour. */
2810 for (p
= current_binding_level
;
2811 p
->kind
!= sk_function_parms
;
2813 p
->more_cleanups_ok
= 0;
2818 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2821 typename_hash (const void* k
)
2824 const_tree
const t
= (const_tree
) k
;
2826 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2827 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2832 typedef struct typename_info
{
2840 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2841 really of type `typename_info*' */
2844 typename_compare (const void * k1
, const void * k2
)
2846 const_tree
const t1
= (const_tree
) k1
;
2847 const typename_info
*const t2
= (const typename_info
*) k2
;
2849 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
2850 && TYPE_CONTEXT (t1
) == t2
->scope
2851 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
2852 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
2853 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
2856 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2857 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2859 Returns the new TYPENAME_TYPE. */
2861 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2864 build_typename_type (tree context
, tree name
, tree fullname
,
2865 enum tag_types tag_type
)
2873 if (typename_htab
== NULL
)
2874 typename_htab
= htab_create_ggc (61, &typename_hash
,
2875 &typename_compare
, NULL
);
2877 ti
.scope
= FROB_CONTEXT (context
);
2879 ti
.template_id
= fullname
;
2880 ti
.enum_p
= tag_type
== enum_type
;
2881 ti
.class_p
= (tag_type
== class_type
2882 || tag_type
== record_type
2883 || tag_type
== union_type
);
2884 hash
= (htab_hash_pointer (ti
.scope
)
2885 ^ htab_hash_pointer (ti
.name
));
2887 /* See if we already have this type. */
2888 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
2893 /* Build the TYPENAME_TYPE. */
2894 t
= make_aggr_type (TYPENAME_TYPE
);
2895 TYPE_CONTEXT (t
) = ti
.scope
;
2896 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
2897 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
2898 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
2900 /* Build the corresponding TYPE_DECL. */
2901 d
= build_decl (TYPE_DECL
, name
, t
);
2902 TYPE_NAME (TREE_TYPE (d
)) = d
;
2903 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2904 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2905 DECL_ARTIFICIAL (d
) = 1;
2907 /* Store it in the hash table. */
2910 /* TYPENAME_TYPEs must always be compared structurally, because
2911 they may or may not resolve down to another type depending on
2912 the currently open classes. */
2913 SET_TYPE_STRUCTURAL_EQUALITY (t
);
2919 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2920 provided to name the type. Returns an appropriate type, unless an
2921 error occurs, in which case error_mark_node is returned. If we
2922 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2923 return that, rather than the _TYPE it corresponds to, in other
2924 cases we look through the type decl. If TF_ERROR is set, complain
2925 about errors, otherwise be quiet. */
2928 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
2929 tsubst_flags_t complain
)
2935 if (name
== error_mark_node
2936 || context
== NULL_TREE
2937 || context
== error_mark_node
)
2938 return error_mark_node
;
2942 if (!(TYPE_LANG_SPECIFIC (name
)
2943 && (CLASSTYPE_IS_TEMPLATE (name
)
2944 || CLASSTYPE_USE_TEMPLATE (name
))))
2945 name
= TYPE_IDENTIFIER (name
);
2947 /* Create a TEMPLATE_ID_EXPR for the type. */
2948 name
= build_nt (TEMPLATE_ID_EXPR
,
2949 CLASSTYPE_TI_TEMPLATE (name
),
2950 CLASSTYPE_TI_ARGS (name
));
2952 else if (TREE_CODE (name
) == TYPE_DECL
)
2953 name
= DECL_NAME (name
);
2957 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2959 name
= TREE_OPERAND (name
, 0);
2960 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2961 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2962 else if (TREE_CODE (name
) == OVERLOAD
)
2964 error ("%qD is not a type", name
);
2965 return error_mark_node
;
2968 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2970 error ("%qD used without template parameters", name
);
2971 return error_mark_node
;
2973 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2974 gcc_assert (TYPE_P (context
));
2976 /* When the CONTEXT is a dependent type, NAME could refer to a
2977 dependent base class of CONTEXT. So we cannot peek inside it,
2978 even if CONTEXT is a currently open scope. */
2979 if (dependent_type_p (context
))
2980 return build_typename_type (context
, name
, fullname
, tag_type
);
2982 if (!IS_AGGR_TYPE (context
))
2984 if (complain
& tf_error
)
2985 error ("%q#T is not a class", context
);
2986 return error_mark_node
;
2989 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
2991 /* We should only set WANT_TYPE when we're a nested typename type.
2992 Then we can give better diagnostics if we find a non-type. */
2993 t
= lookup_field (context
, name
, 0, /*want_type=*/true);
2996 if (complain
& tf_error
)
2997 error (want_template
? "no class template named %q#T in %q#T"
2998 : "no type named %q#T in %q#T", name
, context
);
2999 return error_mark_node
;
3002 if (want_template
&& !DECL_CLASS_TEMPLATE_P (t
))
3004 if (complain
& tf_error
)
3005 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3007 return error_mark_node
;
3009 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3011 if (complain
& tf_error
)
3012 error ("%<typename %T::%D%> names %q#T, which is not a type",
3014 return error_mark_node
;
3017 if (complain
& tf_error
)
3018 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3021 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3023 /*entering_scope=*/0,
3024 tf_warning_or_error
| tf_user
);
3026 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3032 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3033 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3034 in which case error_mark_node is returned.
3036 If PARM_LIST is non-NULL, also make sure that the template parameter
3037 list of TEMPLATE_DECL matches.
3039 If COMPLAIN zero, don't complain about any errors that occur. */
3042 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3043 tsubst_flags_t complain
)
3049 name
= TYPE_IDENTIFIER (name
);
3050 else if (DECL_P (name
))
3051 name
= DECL_NAME (name
);
3052 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3054 if (!dependent_type_p (context
)
3055 || currently_open_class (context
))
3057 tree tmpl
= NULL_TREE
;
3059 if (IS_AGGR_TYPE (context
))
3060 tmpl
= lookup_field (context
, name
, 0, false);
3062 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
3064 if (complain
& tf_error
)
3065 error ("no class template named %q#T in %q#T", name
, context
);
3066 return error_mark_node
;
3070 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3072 if (complain
& tf_error
)
3074 error ("template parameters do not match template");
3075 error ("%q+D declared here", tmpl
);
3077 return error_mark_node
;
3080 if (complain
& tf_error
)
3081 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3086 /* Build the UNBOUND_CLASS_TEMPLATE. */
3087 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
3088 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3089 TREE_TYPE (t
) = NULL_TREE
;
3090 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3092 /* Build the corresponding TEMPLATE_DECL. */
3093 d
= build_decl (TEMPLATE_DECL
, name
, t
);
3094 TYPE_NAME (TREE_TYPE (d
)) = d
;
3095 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3096 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3097 DECL_ARTIFICIAL (d
) = 1;
3098 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3105 /* Push the declarations of builtin types into the namespace.
3106 RID_INDEX is the index of the builtin type in the array
3107 RID_POINTERS. NAME is the name used when looking up the builtin
3108 type. TYPE is the _TYPE node for the builtin type. */
3111 record_builtin_type (enum rid rid_index
,
3115 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3116 tree tdecl
= NULL_TREE
;
3118 if ((int) rid_index
< (int) RID_MAX
)
3119 rname
= ridpointers
[(int) rid_index
];
3121 tname
= get_identifier (name
);
3123 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3124 eliminated. Built-in types should not be looked up name; their
3125 names are keywords that the parser can recognize. However, there
3126 is code in c-common.c that uses identifier_global_value to look
3127 up built-in types by name. */
3130 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
3131 DECL_ARTIFICIAL (tdecl
) = 1;
3132 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3138 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
3139 DECL_ARTIFICIAL (tdecl
) = 1;
3141 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3144 if (!TYPE_NAME (type
))
3145 TYPE_NAME (type
) = tdecl
;
3148 debug_hooks
->type_decl (tdecl
, 0);
3151 /* Record one of the standard Java types.
3152 * Declare it as having the given NAME.
3153 * If SIZE > 0, it is the size of one of the integral types;
3154 * otherwise it is the negative of the size of one of the other types. */
3157 record_builtin_java_type (const char* name
, int size
)
3161 type
= make_signed_type (size
);
3162 else if (size
> -32)
3163 { /* "__java_char" or ""__java_boolean". */
3164 type
= make_unsigned_type (-size
);
3165 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3168 { /* "__java_float" or ""__java_double". */
3169 type
= make_node (REAL_TYPE
);
3170 TYPE_PRECISION (type
) = - size
;
3173 record_builtin_type (RID_MAX
, name
, type
);
3174 decl
= TYPE_NAME (type
);
3176 /* Suppress generate debug symbol entries for these types,
3177 since for normal C++ they are just clutter.
3178 However, push_lang_context undoes this if extern "Java" is seen. */
3179 DECL_IGNORED_P (decl
) = 1;
3181 TYPE_FOR_JAVA (type
) = 1;
3185 /* Push a type into the namespace so that the back ends ignore it. */
3188 record_unknown_type (tree type
, const char* name
)
3190 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
3191 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3192 DECL_IGNORED_P (decl
) = 1;
3193 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3194 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3195 TYPE_ALIGN (type
) = 1;
3196 TYPE_USER_ALIGN (type
) = 0;
3197 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
3200 /* A string for which we should create an IDENTIFIER_NODE at
3203 typedef struct predefined_identifier
3205 /* The name of the identifier. */
3206 const char *const name
;
3207 /* The place where the IDENTIFIER_NODE should be stored. */
3209 /* Nonzero if this is the name of a constructor or destructor. */
3210 const int ctor_or_dtor_p
;
3211 } predefined_identifier
;
3213 /* Create all the predefined identifiers. */
3216 initialize_predefined_identifiers (void)
3218 const predefined_identifier
*pid
;
3220 /* A table of identifiers to create at startup. */
3221 static const predefined_identifier predefined_identifiers
[] = {
3222 { "C++", &lang_name_cplusplus
, 0 },
3223 { "C", &lang_name_c
, 0 },
3224 { "Java", &lang_name_java
, 0 },
3225 /* Some of these names have a trailing space so that it is
3226 impossible for them to conflict with names written by users. */
3227 { "__ct ", &ctor_identifier
, 1 },
3228 { "__base_ctor ", &base_ctor_identifier
, 1 },
3229 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3230 { "__dt ", &dtor_identifier
, 1 },
3231 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3232 { "__base_dtor ", &base_dtor_identifier
, 1 },
3233 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3234 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3235 { "nelts", &nelts_identifier
, 0 },
3236 { THIS_NAME
, &this_identifier
, 0 },
3237 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3238 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3239 { "_vptr", &vptr_identifier
, 0 },
3240 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3241 { "::", &global_scope_name
, 0 },
3242 { "std", &std_identifier
, 0 },
3246 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3248 *pid
->node
= get_identifier (pid
->name
);
3249 if (pid
->ctor_or_dtor_p
)
3250 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3254 /* Create the predefined scalar types of C,
3255 and some nodes representing standard constants (0, 1, (void *)0).
3256 Initialize the global binding level.
3257 Make definitions for built-in primitive functions. */
3260 cxx_init_decl_processing (void)
3263 tree void_ftype_ptr
;
3265 build_common_tree_nodes (flag_signed_char
, false);
3267 /* Create all the identifiers we need. */
3268 initialize_predefined_identifiers ();
3270 /* Create the global variables. */
3271 push_to_top_level ();
3273 current_function_decl
= NULL_TREE
;
3274 current_binding_level
= NULL
;
3275 /* Enter the global namespace. */
3276 gcc_assert (global_namespace
== NULL_TREE
);
3277 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3279 TREE_PUBLIC (global_namespace
) = 1;
3280 begin_scope (sk_namespace
, global_namespace
);
3282 current_lang_name
= NULL_TREE
;
3284 if (flag_visibility_ms_compat
)
3285 default_visibility
= VISIBILITY_HIDDEN
;
3288 current_lang_name
= lang_name_c
;
3290 /* Create the `std' namespace. */
3291 push_namespace (std_identifier
);
3292 std_node
= current_namespace
;
3295 c_common_nodes_and_builtins ();
3297 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3298 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3299 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3300 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3301 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3302 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3303 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3304 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3306 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3307 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3309 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3310 truthvalue_type_node
= boolean_type_node
;
3311 truthvalue_false_node
= boolean_false_node
;
3312 truthvalue_true_node
= boolean_true_node
;
3314 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3317 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3320 delta_type_node
= ptrdiff_type_node
;
3321 vtable_index_type
= ptrdiff_type_node
;
3323 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3324 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3325 void_ftype_ptr
= build_function_type (void_type_node
,
3326 tree_cons (NULL_TREE
,
3330 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3332 /* C++ extensions */
3334 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3335 record_unknown_type (unknown_type_node
, "unknown type");
3337 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3338 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3340 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3342 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3343 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3346 /* Make sure we get a unique function type, so we can give
3347 its pointer type a name. (This wins for gdb.) */
3348 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3349 TREE_TYPE (vfunc_type
) = integer_type_node
;
3350 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3351 layout_type (vfunc_type
);
3353 vtable_entry_type
= build_pointer_type (vfunc_type
);
3355 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3358 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3359 layout_type (vtbl_type_node
);
3360 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3361 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3362 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3363 layout_type (vtbl_ptr_type_node
);
3364 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3366 push_namespace (get_identifier ("__cxxabiv1"));
3367 abi_node
= current_namespace
;
3370 global_type_node
= make_node (LANG_TYPE
);
3371 record_unknown_type (global_type_node
, "global type");
3374 current_lang_name
= lang_name_cplusplus
;
3378 tree bad_alloc_type_node
;
3379 tree bad_alloc_decl
;
3380 tree newtype
, deltype
;
3381 tree ptr_ftype_sizetype
;
3383 push_namespace (std_identifier
);
3384 bad_alloc_id
= get_identifier ("bad_alloc");
3385 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3386 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3388 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3389 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3390 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3394 = build_function_type (ptr_type_node
,
3395 tree_cons (NULL_TREE
,
3398 newtype
= build_exception_variant
3399 (ptr_ftype_sizetype
, add_exception_specifier
3400 (NULL_TREE
, bad_alloc_type_node
, -1));
3401 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3402 push_cp_library_fn (NEW_EXPR
, newtype
);
3403 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3404 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3405 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3409 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3411 /* Perform other language dependent initializations. */
3412 init_class_processing ();
3413 init_rtti_processing ();
3415 if (flag_exceptions
)
3416 init_exception_processing ();
3418 if (! supports_one_only ())
3421 make_fname_decl
= cp_make_fname_decl
;
3422 start_fname_decls ();
3424 /* Show we use EH for cleanups. */
3425 if (flag_exceptions
)
3426 using_eh_for_cleanups ();
3429 /* Generate an initializer for a function naming variable from
3430 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3431 filled in with the type of the init. */
3434 cp_fname_init (const char* name
, tree
*type_p
)
3436 tree domain
= NULL_TREE
;
3438 tree init
= NULL_TREE
;
3443 length
= strlen (name
);
3444 domain
= build_index_type (size_int (length
));
3445 init
= build_string (length
+ 1, name
);
3448 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3449 type
= build_cplus_array_type (type
, domain
);
3454 TREE_TYPE (init
) = type
;
3456 init
= error_mark_node
;
3461 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3462 decl, NAME is the initialization string and TYPE_DEP indicates whether
3463 NAME depended on the type of the function. We make use of that to detect
3464 __PRETTY_FUNCTION__ inside a template fn. This is being done
3465 lazily at the point of first use, so we mustn't push the decl now. */
3468 cp_make_fname_decl (tree id
, int type_dep
)
3470 const char *const name
= (type_dep
&& processing_template_decl
3471 ? NULL
: fname_as_string (type_dep
));
3473 tree init
= cp_fname_init (name
, &type
);
3474 tree decl
= build_decl (VAR_DECL
, id
, type
);
3477 free (CONST_CAST (char *, name
));
3479 /* As we're using pushdecl_with_scope, we must set the context. */
3480 DECL_CONTEXT (decl
) = current_function_decl
;
3481 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3483 TREE_STATIC (decl
) = 1;
3484 TREE_READONLY (decl
) = 1;
3485 DECL_ARTIFICIAL (decl
) = 1;
3487 TREE_USED (decl
) = 1;
3489 if (current_function_decl
)
3491 struct cp_binding_level
*b
= current_binding_level
;
3492 while (b
->level_chain
->kind
!= sk_function_parms
)
3494 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3495 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3496 LOOKUP_ONLYCONVERTING
);
3499 pushdecl_top_level_and_finish (decl
, init
);
3505 builtin_function_1 (tree decl
, tree context
)
3507 tree id
= DECL_NAME (decl
);
3508 const char *name
= IDENTIFIER_POINTER (id
);
3510 retrofit_lang_decl (decl
);
3512 /* All nesting of C++ functions is lexical; there is never a "static
3513 chain" in the sense of GNU C nested functions. */
3514 DECL_NO_STATIC_CHAIN (decl
) = 1;
3516 DECL_ARTIFICIAL (decl
) = 1;
3517 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3518 SET_DECL_LANGUAGE (decl
, lang_c
);
3519 /* Runtime library routines are, by definition, available in an
3520 external shared object. */
3521 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3522 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3524 DECL_CONTEXT (decl
) = context
;
3528 /* A function in the user's namespace should have an explicit
3529 declaration before it is used. Mark the built-in function as
3530 anticipated but not actually declared. */
3531 if (name
[0] != '_' || name
[1] != '_')
3532 DECL_ANTICIPATED (decl
) = 1;
3533 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3535 size_t len
= strlen (name
);
3537 /* Treat __*_chk fortification functions as anticipated as well,
3538 unless they are __builtin_*. */
3539 if (len
> strlen ("___chk")
3540 && memcmp (name
+ len
- strlen ("_chk"),
3541 "_chk", strlen ("_chk") + 1) == 0)
3542 DECL_ANTICIPATED (decl
) = 1;
3549 cxx_builtin_function (tree decl
)
3551 tree id
= DECL_NAME (decl
);
3552 const char *name
= IDENTIFIER_POINTER (id
);
3553 /* All builtins that don't begin with an '_' should additionally
3554 go in the 'std' namespace. */
3557 tree decl2
= copy_node(decl
);
3558 push_namespace (std_identifier
);
3559 builtin_function_1 (decl2
, std_node
);
3563 return builtin_function_1 (decl
, NULL_TREE
);
3566 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3567 function. Not called directly. */
3570 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3572 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3573 DECL_EXTERNAL (fn
) = 1;
3574 TREE_PUBLIC (fn
) = 1;
3575 DECL_ARTIFICIAL (fn
) = 1;
3576 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3577 SET_DECL_LANGUAGE (fn
, lang_c
);
3578 /* Runtime library routines are, by definition, available in an
3579 external shared object. */
3580 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3581 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3585 /* Returns the _DECL for a library function with C linkage.
3586 We assume that such functions never throw; if this is incorrect,
3587 callers should unset TREE_NOTHROW. */
3590 build_library_fn (tree name
, tree type
)
3592 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3593 TREE_NOTHROW (fn
) = 1;
3597 /* Returns the _DECL for a library function with C++ linkage. */
3600 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3602 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3603 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3604 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3605 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3609 /* Like build_library_fn, but takes a C string instead of an
3613 build_library_fn_ptr (const char* name
, tree type
)
3615 return build_library_fn (get_identifier (name
), type
);
3618 /* Like build_cp_library_fn, but takes a C string instead of an
3622 build_cp_library_fn_ptr (const char* name
, tree type
)
3624 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3627 /* Like build_library_fn, but also pushes the function so that we will
3628 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3631 push_library_fn (tree name
, tree type
)
3633 tree fn
= build_library_fn (name
, type
);
3634 pushdecl_top_level (fn
);
3638 /* Like build_cp_library_fn, but also pushes the function so that it
3639 will be found by normal lookup. */
3642 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3644 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3651 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3655 push_void_library_fn (tree name
, tree parmtypes
)
3657 tree type
= build_function_type (void_type_node
, parmtypes
);
3658 return push_library_fn (name
, type
);
3661 /* Like push_library_fn, but also note that this function throws
3662 and does not return. Used for __throw_foo and the like. */
3665 push_throw_library_fn (tree name
, tree type
)
3667 tree fn
= push_library_fn (name
, type
);
3668 TREE_THIS_VOLATILE (fn
) = 1;
3669 TREE_NOTHROW (fn
) = 0;
3673 /* When we call finish_struct for an anonymous union, we create
3674 default copy constructors and such. But, an anonymous union
3675 shouldn't have such things; this function undoes the damage to the
3676 anonymous union type T.
3678 (The reason that we create the synthesized methods is that we don't
3679 distinguish `union { int i; }' from `typedef union { int i; } U'.
3680 The first is an anonymous union; the second is just an ordinary
3684 fixup_anonymous_aggr (tree t
)
3688 /* Wipe out memory of synthesized methods. */
3689 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3690 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3691 TYPE_HAS_INIT_REF (t
) = 0;
3692 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3693 TYPE_HAS_ASSIGN_REF (t
) = 0;
3694 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3696 /* Splice the implicitly generated functions out of the TYPE_METHODS
3698 q
= &TYPE_METHODS (t
);
3701 if (DECL_ARTIFICIAL (*q
))
3702 *q
= TREE_CHAIN (*q
);
3704 q
= &TREE_CHAIN (*q
);
3707 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3708 if (TYPE_METHODS (t
))
3710 tree decl
= TYPE_MAIN_DECL (t
);
3712 if (TREE_CODE (t
) != UNION_TYPE
)
3713 error ("%Jan anonymous struct cannot have function members", decl
);
3715 error ("%Jan anonymous union cannot have function members", decl
);
3718 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3719 assignment operators (because they cannot have these methods themselves).
3720 For anonymous unions this is already checked because they are not allowed
3721 in any union, otherwise we have to check it. */
3722 if (TREE_CODE (t
) != UNION_TYPE
)
3726 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3727 if (TREE_CODE (field
) == FIELD_DECL
)
3729 type
= TREE_TYPE (field
);
3730 if (CLASS_TYPE_P (type
))
3732 if (TYPE_NEEDS_CONSTRUCTING (type
))
3733 error ("member %q+#D with constructor not allowed "
3734 "in anonymous aggregate", field
);
3735 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3736 error ("member %q+#D with destructor not allowed "
3737 "in anonymous aggregate", field
);
3738 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3739 error ("member %q+#D with copy assignment operator "
3740 "not allowed in anonymous aggregate", field
);
3746 /* Make sure that a declaration with no declarator is well-formed, i.e.
3747 just declares a tagged type or anonymous union.
3749 Returns the type declared; or NULL_TREE if none. */
3752 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3754 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3755 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3756 /* If a class, struct, or enum type is declared by the DECLSPECS
3757 (i.e, if a class-specifier, enum-specifier, or non-typename
3758 elaborated-type-specifier appears in the DECLSPECS),
3759 DECLARED_TYPE is set to the corresponding type. */
3760 tree declared_type
= NULL_TREE
;
3761 bool error_p
= false;
3763 if (declspecs
->multiple_types_p
)
3764 error ("multiple types in one declaration");
3765 else if (declspecs
->redefined_builtin_type
)
3767 if (!in_system_header
)
3768 pedwarn ("redeclaration of C++ built-in type %qT",
3769 declspecs
->redefined_builtin_type
);
3774 && TYPE_P (declspecs
->type
)
3775 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3776 && IS_AGGR_TYPE (declspecs
->type
))
3777 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3778 declared_type
= declspecs
->type
;
3779 else if (declspecs
->type
== error_mark_node
)
3781 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3782 pedwarn ("declaration does not declare anything");
3783 /* Check for an anonymous union. */
3784 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3785 && TYPE_ANONYMOUS_P (declared_type
))
3787 /* 7/3 In a simple-declaration, the optional init-declarator-list
3788 can be omitted only when declaring a class (clause 9) or
3789 enumeration (7.2), that is, when the decl-specifier-seq contains
3790 either a class-specifier, an elaborated-type-specifier with
3791 a class-key (9.1), or an enum-specifier. In these cases and
3792 whenever a class-specifier or enum-specifier is present in the
3793 decl-specifier-seq, the identifiers in these specifiers are among
3794 the names being declared by the declaration (as class-name,
3795 enum-names, or enumerators, depending on the syntax). In such
3796 cases, and except for the declaration of an unnamed bit-field (9.6),
3797 the decl-specifier-seq shall introduce one or more names into the
3798 program, or shall redeclare a name introduced by a previous
3799 declaration. [Example:
3800 enum { }; // ill-formed
3801 typedef class { }; // ill-formed
3805 error ("missing type-name in typedef-declaration");
3808 /* Anonymous unions are objects, so they can have specifiers. */;
3809 SET_ANON_AGGR_TYPE_P (declared_type
);
3811 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3812 && !in_system_header
)
3813 pedwarn ("ISO C++ prohibits anonymous structs");
3818 if (declspecs
->specs
[(int)ds_inline
]
3819 || declspecs
->specs
[(int)ds_virtual
])
3820 error ("%qs can only be specified for functions",
3821 declspecs
->specs
[(int)ds_inline
]
3822 ? "inline" : "virtual");
3824 && (!current_class_type
3825 || current_scope () != current_class_type
))
3826 error ("%<friend%> can only be specified inside a class");
3827 else if (declspecs
->specs
[(int)ds_explicit
])
3828 error ("%<explicit%> can only be specified for constructors");
3829 else if (declspecs
->storage_class
)
3830 error ("a storage class can only be specified for objects "
3832 else if (declspecs
->specs
[(int)ds_const
]
3833 || declspecs
->specs
[(int)ds_volatile
]
3834 || declspecs
->specs
[(int)ds_restrict
]
3835 || declspecs
->specs
[(int)ds_thread
])
3836 error ("qualifiers can only be specified for objects "
3838 else if (saw_typedef
)
3839 warning (0, "%<typedef%> was ignored in this declaration");
3842 return declared_type
;
3845 /* Called when a declaration is seen that contains no names to declare.
3846 If its type is a reference to a structure, union or enum inherited
3847 from a containing scope, shadow that tag name for the current scope
3848 with a forward reference.
3849 If its type defines a new named structure or union
3850 or defines an enum, it is valid but we need not do anything here.
3851 Otherwise, it is an error.
3853 C++: may have to grok the declspecs to learn about static,
3854 complain for anonymous unions.
3856 Returns the TYPE declared -- or NULL_TREE if none. */
3859 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3861 tree t
= check_tag_decl (declspecs
);
3866 if (declspecs
->attributes
)
3868 warning (0, "attribute ignored in declaration of %q+#T", t
);
3869 warning (0, "attribute for %q+#T must follow the %qs keyword",
3870 t
, class_key_or_enum_as_string (t
));
3874 if (maybe_process_partial_specialization (t
) == error_mark_node
)
3877 /* This is where the variables in an anonymous union are
3878 declared. An anonymous union declaration looks like:
3880 because there is no declarator after the union, the parser
3881 sends that declaration here. */
3882 if (ANON_AGGR_TYPE_P (t
))
3884 fixup_anonymous_aggr (t
);
3886 if (TYPE_FIELDS (t
))
3888 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3889 declspecs
, NORMAL
, 0, NULL
);
3890 finish_anon_union (decl
);
3897 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3900 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3901 const cp_declarator
*declarator
)
3905 attrs
= type_specifiers
->attributes
;
3906 type_specifiers
->attributes
= NULL_TREE
;
3907 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3910 if (CLASS_TYPE_P (type
))
3911 warning (OPT_Wattributes
, "ignoring attributes applied to class type "
3912 "outside of definition");
3914 cplus_decl_attributes (&type
, attrs
, 0);
3919 /* Process a DECLARATOR for a function-scope variable declaration,
3920 namespace-scope variable declaration, or function declaration.
3921 (Function definitions go through start_function; class member
3922 declarations appearing in the body of the class go through
3923 grokfield.) The DECL corresponding to the DECLARATOR is returned.
3924 If an error occurs, the error_mark_node is returned instead.
3926 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED
3927 is true if an explicit initializer is present, but false if this is
3928 a variable implicitly initialized via a default constructor.
3929 ATTRIBUTES and PREFIX_ATTRIBUTES are GNU attributes associated with
3930 this declaration. *PUSHED_SCOPE_P is set to the scope entered in
3931 this function, if any; if set, the caller is responsible for
3932 calling pop_scope. */
3935 start_decl (const cp_declarator
*declarator
,
3936 cp_decl_specifier_seq
*declspecs
,
3939 tree prefix_attributes
,
3940 tree
*pushed_scope_p
)
3947 *pushed_scope_p
= NULL_TREE
;
3949 /* An object declared as __attribute__((deprecated)) suppresses
3950 warnings of uses of other deprecated items. */
3951 if (lookup_attribute ("deprecated", attributes
))
3952 deprecated_state
= DEPRECATED_SUPPRESS
;
3954 attributes
= chainon (attributes
, prefix_attributes
);
3956 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3959 deprecated_state
= DEPRECATED_NORMAL
;
3961 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
3962 || decl
== error_mark_node
)
3963 return error_mark_node
;
3965 type
= TREE_TYPE (decl
);
3967 context
= DECL_CONTEXT (decl
);
3971 *pushed_scope_p
= push_scope (context
);
3973 /* We are only interested in class contexts, later. */
3974 if (TREE_CODE (context
) == NAMESPACE_DECL
)
3975 context
= NULL_TREE
;
3979 /* Is it valid for this decl to have an initializer at all?
3980 If not, set INITIALIZED to zero, which will indirectly
3981 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3982 switch (TREE_CODE (decl
))
3985 error ("typedef %qD is initialized (use __typeof__ instead)", decl
);
3986 return error_mark_node
;
3989 error ("function %q#D is initialized like a variable", decl
);
3990 return error_mark_node
;
3998 if (! toplevel_bindings_p ()
3999 && DECL_EXTERNAL (decl
))
4000 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4002 DECL_EXTERNAL (decl
) = 0;
4003 if (toplevel_bindings_p ())
4004 TREE_STATIC (decl
) = 1;
4007 /* Set attributes here so if duplicate decl, will have proper attributes. */
4008 cplus_decl_attributes (&decl
, attributes
, 0);
4010 /* Dllimported symbols cannot be defined. Static data members (which
4011 can be initialized in-class and dllimported) go through grokfield,
4012 not here, so we don't need to exclude those decls when checking for
4014 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4016 error ("definition of %q#D is marked %<dllimport%>", decl
);
4017 DECL_DLLIMPORT_P (decl
) = 0;
4020 /* If #pragma weak was used, mark the decl weak now. */
4021 maybe_apply_pragma_weak (decl
);
4023 if (TREE_CODE (decl
) == FUNCTION_DECL
4024 && DECL_DECLARED_INLINE_P (decl
)
4025 && DECL_UNINLINABLE (decl
)
4026 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4027 warning (0, "inline function %q+D given attribute noinline", decl
);
4029 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
4031 if (TREE_CODE (decl
) == VAR_DECL
)
4033 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4034 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4035 error ("%q#D is not a static member of %q#T", decl
, context
);
4038 if (DECL_CONTEXT (field
) != context
)
4040 if (!same_type_p (DECL_CONTEXT (field
), context
))
4041 pedwarn ("ISO C++ does not permit %<%T::%D%> "
4042 "to be defined as %<%T::%D%>",
4043 DECL_CONTEXT (field
), DECL_NAME (decl
),
4044 context
, DECL_NAME (decl
));
4045 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4047 if (processing_specialization
4048 && template_class_depth (context
) == 0
4049 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4050 error ("template header not allowed in member definition "
4051 "of explicitly specialized class");
4052 /* Static data member are tricky; an in-class initialization
4053 still doesn't provide a definition, so the in-class
4054 declaration will have DECL_EXTERNAL set, but will have an
4055 initialization. Thus, duplicate_decls won't warn
4056 about this situation, and so we check here. */
4057 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4058 error ("duplicate initialization of %qD", decl
);
4059 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4065 tree field
= check_classfn (context
, decl
,
4066 (processing_template_decl
4067 > template_class_depth (context
))
4068 ? current_template_parms
4070 if (field
&& field
!= error_mark_node
4071 && duplicate_decls (decl
, field
,
4072 /*newdecl_is_friend=*/false))
4076 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4077 DECL_IN_AGGR_P (decl
) = 0;
4078 /* Do not mark DECL as an explicit specialization if it was not
4079 already marked as an instantiation; a declaration should
4080 never be marked as a specialization unless we know what
4081 template is being specialized. */
4082 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4084 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4086 /* [temp.expl.spec] An explicit specialization of a static data
4087 member of a template is a definition if the declaration
4088 includes an initializer; otherwise, it is a declaration.
4090 We check for processing_specialization so this only applies
4091 to the new specialization syntax. */
4092 if (!initialized
&& processing_specialization
)
4093 DECL_EXTERNAL (decl
) = 1;
4096 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
4097 pedwarn ("declaration of %q#D outside of class is not definition",
4101 was_public
= TREE_PUBLIC (decl
);
4103 /* Enter this declaration into the symbol table. */
4104 decl
= maybe_push_decl (decl
);
4106 if (processing_template_decl
)
4107 decl
= push_template_decl (decl
);
4108 if (decl
== error_mark_node
)
4109 return error_mark_node
;
4111 /* Tell the back end to use or not use .common as appropriate. If we say
4112 -fconserve-space, we want this to save .data space, at the expense of
4113 wrong semantics. If we say -fno-conserve-space, we want this to
4114 produce errors about redefs; to do this we force variables into the
4116 if (flag_conserve_space
4117 && TREE_CODE (decl
) == VAR_DECL
4118 && TREE_PUBLIC (decl
)
4119 && !DECL_THREAD_LOCAL_P (decl
)
4120 && !have_global_bss_p ())
4121 DECL_COMMON (decl
) = 1;
4123 if (TREE_CODE (decl
) == VAR_DECL
4124 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4125 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4127 /* This is a const variable with implicit 'static'. Set
4128 DECL_THIS_STATIC so we can tell it from variables that are
4129 !TREE_PUBLIC because of the anonymous namespace. */
4130 gcc_assert (cp_type_readonly (TREE_TYPE (decl
)));
4131 DECL_THIS_STATIC (decl
) = 1;
4134 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4135 start_decl_1 (decl
, initialized
);
4140 /* Process the declaration of a variable DECL. INITIALIZED is true
4141 iff DECL is explicitly initialized. (INITIALIZED is false if the
4142 variable is initialized via an implicitly-called constructor.)
4143 This function must be called for ordinary variables (including, for
4144 example, implicit instantiations of templates), but must not be
4145 called for template declarations. */
4148 start_decl_1 (tree decl
, bool initialized
)
4152 bool aggregate_definition_p
;
4154 gcc_assert (!processing_template_decl
);
4156 if (error_operand_p (decl
))
4159 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4161 type
= TREE_TYPE (decl
);
4162 complete_p
= COMPLETE_TYPE_P (type
);
4163 aggregate_definition_p
= IS_AGGR_TYPE (type
) && !DECL_EXTERNAL (decl
);
4165 /* If an explicit initializer is present, or if this is a definition
4166 of an aggregate, then we need a complete type at this point.
4167 (Scalars are always complete types, so there is nothing to
4168 check.) This code just sets COMPLETE_P; errors (if necessary)
4169 are issued below. */
4170 if ((initialized
|| aggregate_definition_p
)
4172 && COMPLETE_TYPE_P (complete_type (type
)))
4175 /* We will not yet have set TREE_READONLY on DECL if the type
4176 was "const", but incomplete, before this point. But, now, we
4177 have a complete type, so we can try again. */
4178 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4182 /* Is it valid for this decl to have an initializer at all? */
4184 /* Don't allow initializations for incomplete types except for
4185 arrays which might be completed by the initialization. */
4187 ; /* A complete type is ok. */
4188 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4190 error ("variable %q#D has initializer but incomplete type", decl
);
4191 type
= TREE_TYPE (decl
) = error_mark_node
;
4193 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4195 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4196 error ("elements of array %q#D have incomplete type", decl
);
4197 /* else we already gave an error in start_decl. */
4200 else if (aggregate_definition_p
&& !complete_p
)
4202 error ("aggregate %q#D has incomplete type and cannot be defined",
4204 /* Change the type so that assemble_variable will give
4205 DECL an rtl we can live with: (mem (const_int 0)). */
4206 type
= TREE_TYPE (decl
) = error_mark_node
;
4209 /* Create a new scope to hold this declaration if necessary.
4210 Whether or not a new scope is necessary cannot be determined
4211 until after the type has been completed; if the type is a
4212 specialization of a class template it is not until after
4213 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4214 will be set correctly. */
4215 maybe_push_cleanup_level (type
);
4218 /* Handle initialization of references. DECL, TYPE, and INIT have the
4219 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4220 but will be set to a new CLEANUP_STMT if a temporary is created
4221 that must be destroyed subsequently.
4223 Returns an initializer expression to use to initialize DECL, or
4224 NULL if the initialization can be performed statically.
4226 Quotes on semantics can be found in ARM 8.4.3. */
4229 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4233 if (init
== NULL_TREE
)
4235 if ((DECL_LANG_SPECIFIC (decl
) == 0
4236 || DECL_IN_AGGR_P (decl
) == 0)
4237 && ! DECL_THIS_EXTERN (decl
))
4238 error ("%qD declared as reference but not initialized", decl
);
4242 if (TREE_CODE (init
) == CONSTRUCTOR
)
4244 error ("ISO C++ forbids use of initializer list to "
4245 "initialize reference %qD", decl
);
4249 if (TREE_CODE (init
) == TREE_LIST
)
4250 init
= build_x_compound_expr_from_list (init
, "initializer");
4252 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4253 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4254 /* Note: default conversion is only called in very special cases. */
4255 init
= decay_conversion (init
);
4257 /* Convert INIT to the reference type TYPE. This may involve the
4258 creation of a temporary, whose lifetime must be the same as that
4259 of the reference. If so, a DECL_EXPR for the temporary will be
4260 added just after the DECL_EXPR for DECL. That's why we don't set
4261 DECL_INITIAL for local references (instead assigning to them
4262 explicitly); we need to allow the temporary to be initialized
4264 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
4266 if (tmp
== error_mark_node
)
4268 else if (tmp
== NULL_TREE
)
4270 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
4274 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
4277 DECL_INITIAL (decl
) = tmp
;
4282 /* Designated initializers in arrays are not supported in GNU C++.
4283 The parser cannot detect this error since it does not know whether
4284 a given brace-enclosed initializer is for a class type or for an
4285 array. This function checks that CE does not use a designated
4286 initializer. If it does, an error is issued. Returns true if CE
4287 is valid, i.e., does not have a designated initializer. */
4290 check_array_designated_initializer (const constructor_elt
*ce
)
4292 /* Designated initializers for array elements are not supported. */
4295 /* The parser only allows identifiers as designated
4297 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4298 error ("name %qD used in a GNU-style designated "
4299 "initializer for an array", ce
->index
);
4306 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4307 array until we finish parsing the initializer. If that's the
4308 situation we're in, update DECL accordingly. */
4311 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4313 tree type
= TREE_TYPE (decl
);
4315 if (TREE_CODE (type
) == ARRAY_TYPE
4316 && TYPE_DOMAIN (type
) == NULL_TREE
4317 && TREE_CODE (decl
) != TYPE_DECL
)
4319 /* do_default is really a C-ism to deal with tentative definitions.
4320 But let's leave it here to ease the eventual merge. */
4321 int do_default
= !DECL_EXTERNAL (decl
);
4322 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4325 /* Check that there are no designated initializers in INIT, as
4326 those are not supported in GNU C++, and as the middle-end
4327 will crash if presented with a non-numeric designated
4329 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4331 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4332 constructor_elt
*ce
;
4335 VEC_iterate (constructor_elt
, v
, i
, ce
);
4337 if (!check_array_designated_initializer (ce
))
4343 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4347 error ("initializer fails to determine size of %qD", decl
);
4348 TREE_TYPE (decl
) = error_mark_node
;
4350 else if (failure
== 2)
4354 error ("array size missing in %qD", decl
);
4355 TREE_TYPE (decl
) = error_mark_node
;
4357 /* If a `static' var's size isn't known, make it extern as
4358 well as static, so it does not get allocated. If it's not
4359 `static', then don't mark it extern; finish_incomplete_decl
4360 will give it a default size and it will get allocated. */
4361 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4362 DECL_EXTERNAL (decl
) = 1;
4364 else if (failure
== 3)
4366 error ("zero-size array %qD", decl
);
4367 TREE_TYPE (decl
) = error_mark_node
;
4371 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4373 layout_decl (decl
, 0);
4377 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4378 any appropriate error messages regarding the layout. */
4381 layout_var_decl (tree decl
)
4385 type
= TREE_TYPE (decl
);
4386 if (type
== error_mark_node
)
4389 /* If we haven't already layed out this declaration, do so now.
4390 Note that we must not call complete type for an external object
4391 because it's type might involve templates that we are not
4392 supposed to instantiate yet. (And it's perfectly valid to say
4393 `extern X x' for some incomplete type `X'.) */
4394 if (!DECL_EXTERNAL (decl
))
4395 complete_type (type
);
4396 if (!DECL_SIZE (decl
)
4397 && TREE_TYPE (decl
) != error_mark_node
4398 && (COMPLETE_TYPE_P (type
)
4399 || (TREE_CODE (type
) == ARRAY_TYPE
4400 && !TYPE_DOMAIN (type
)
4401 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4402 layout_decl (decl
, 0);
4404 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4406 /* An automatic variable with an incomplete type: that is an error.
4407 Don't talk about array types here, since we took care of that
4408 message in grokdeclarator. */
4409 error ("storage size of %qD isn't known", decl
);
4410 TREE_TYPE (decl
) = error_mark_node
;
4413 /* Keep this code around in case we later want to control debug info
4414 based on whether a type is "used". (jason 1999-11-11) */
4416 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
4417 /* Let debugger know it should output info for this type. */
4418 note_debug_info_needed (ttype
);
4420 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4421 note_debug_info_needed (DECL_CONTEXT (decl
));
4424 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4425 && DECL_SIZE (decl
) != NULL_TREE
4426 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4428 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4429 constant_expression_warning (DECL_SIZE (decl
));
4431 error ("storage size of %qD isn't constant", decl
);
4435 /* If a local static variable is declared in an inline function, or if
4436 we have a weak definition, we must endeavor to create only one
4437 instance of the variable at link-time. */
4440 maybe_commonize_var (tree decl
)
4442 /* Static data in a function with comdat linkage also has comdat
4444 if (TREE_STATIC (decl
)
4445 /* Don't mess with __FUNCTION__. */
4446 && ! DECL_ARTIFICIAL (decl
)
4447 && DECL_FUNCTION_SCOPE_P (decl
)
4448 /* Unfortunately, import_export_decl has not always been called
4449 before the function is processed, so we cannot simply check
4451 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4452 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4453 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4454 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4458 /* With weak symbols, we simply make the variable COMDAT;
4459 that will cause copies in multiple translations units to
4461 comdat_linkage (decl
);
4465 if (DECL_INITIAL (decl
) == NULL_TREE
4466 || DECL_INITIAL (decl
) == error_mark_node
)
4468 /* Without weak symbols, we can use COMMON to merge
4469 uninitialized variables. */
4470 TREE_PUBLIC (decl
) = 1;
4471 DECL_COMMON (decl
) = 1;
4475 /* While for initialized variables, we must use internal
4476 linkage -- which means that multiple copies will not
4478 TREE_PUBLIC (decl
) = 0;
4479 DECL_COMMON (decl
) = 0;
4480 warning (0, "sorry: semantics of inline function static "
4481 "data %q+#D are wrong (you'll wind up "
4482 "with multiple copies)", decl
);
4483 warning (0, "%J you can work around this by removing "
4489 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4490 /* Set it up again; we might have set DECL_INITIAL since the last
4492 comdat_linkage (decl
);
4495 /* Issue an error message if DECL is an uninitialized const variable. */
4498 check_for_uninitialized_const_var (tree decl
)
4500 tree type
= TREE_TYPE (decl
);
4502 /* ``Unless explicitly declared extern, a const object does not have
4503 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4505 if (TREE_CODE (decl
) == VAR_DECL
4506 && TREE_CODE (type
) != REFERENCE_TYPE
4507 && CP_TYPE_CONST_P (type
)
4508 && !TYPE_NEEDS_CONSTRUCTING (type
)
4509 && !DECL_INITIAL (decl
))
4510 error ("uninitialized const %qD", decl
);
4514 /* Structure holding the current initializer being processed by reshape_init.
4515 CUR is a pointer to the current element being processed, END is a pointer
4516 after the last element present in the initializer. */
4517 typedef struct reshape_iterator_t
4519 constructor_elt
*cur
;
4520 constructor_elt
*end
;
4523 static tree
reshape_init_r (tree
, reshape_iter
*, bool);
4525 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4526 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4527 initialized. If there are no more such fields, the return value
4531 next_initializable_field (tree field
)
4534 && (TREE_CODE (field
) != FIELD_DECL
4535 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4536 || DECL_ARTIFICIAL (field
)))
4537 field
= TREE_CHAIN (field
);
4542 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4543 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4544 INTEGER_CST representing the size of the array minus one (the maximum index),
4545 or NULL_TREE if the array was declared without specifying the size. D is
4546 the iterator within the constructor. */
4549 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
)
4552 bool sized_array_p
= (max_index
!= NULL_TREE
);
4553 unsigned HOST_WIDE_INT max_index_cst
= 0;
4554 unsigned HOST_WIDE_INT index
;
4556 /* The initializer for an array is always a CONSTRUCTOR. */
4557 new_init
= build_constructor (NULL_TREE
, NULL
);
4561 /* Minus 1 is used for zero sized arrays. */
4562 if (integer_all_onesp (max_index
))
4565 if (host_integerp (max_index
, 1))
4566 max_index_cst
= tree_low_cst (max_index
, 1);
4567 /* sizetype is sign extended, not zero extended. */
4569 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4573 /* Loop until there are no more initializers. */
4575 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4580 check_array_designated_initializer (d
->cur
);
4581 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false);
4582 if (elt_init
== error_mark_node
)
4583 return error_mark_node
;
4584 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), NULL_TREE
, elt_init
);
4590 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4591 Parameters are the same of reshape_init_r. */
4594 reshape_init_array (tree type
, reshape_iter
*d
)
4596 tree max_index
= NULL_TREE
;
4598 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
4600 if (TYPE_DOMAIN (type
))
4601 max_index
= array_type_nelts (type
);
4603 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4606 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4607 Parameters are the same of reshape_init_r. */
4610 reshape_init_vector (tree type
, reshape_iter
*d
)
4612 tree max_index
= NULL_TREE
;
4615 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
4617 if (COMPOUND_LITERAL_P (d
->cur
->value
))
4619 tree value
= d
->cur
->value
;
4620 if (!same_type_p (TREE_TYPE (value
), type
))
4622 error ("invalid type %qT as initializer for a vector of type %qT",
4623 TREE_TYPE (d
->cur
->value
), type
);
4624 value
= error_mark_node
;
4630 /* For a vector, the representation type is a struct
4631 containing a single member which is an array of the
4632 appropriate size. */
4633 rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4634 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4635 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype
)));
4637 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4640 /* Subroutine of reshape_init_r, processes the initializers for classes
4641 or union. Parameters are the same of reshape_init_r. */
4644 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4649 gcc_assert (CLASS_TYPE_P (type
));
4651 /* The initializer for a class is always a CONSTRUCTOR. */
4652 new_init
= build_constructor (NULL_TREE
, NULL
);
4653 field
= next_initializable_field (TYPE_FIELDS (type
));
4659 An initializer for an aggregate member that is an
4660 empty class shall have the form of an empty
4661 initializer-list {}. */
4662 if (!first_initializer_p
)
4664 error ("initializer for %qT must be brace-enclosed", type
);
4665 return error_mark_node
;
4670 /* Loop through the initializable fields, gathering initializers. */
4671 while (d
->cur
!= d
->end
)
4675 /* Handle designated initializers, as an extension. */
4678 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
4680 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4682 error ("%qT has no non-static data member named %qD", type
,
4684 return error_mark_node
;
4688 /* If we processed all the member of the class, we are done. */
4692 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
4693 /*first_initializer_p=*/false);
4694 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
4698 When a union is initialized with a brace-enclosed
4699 initializer, the braces shall only contain an
4700 initializer for the first member of the union. */
4701 if (TREE_CODE (type
) == UNION_TYPE
)
4704 field
= next_initializable_field (TREE_CHAIN (field
));
4710 /* Subroutine of reshape_init, which processes a single initializer (part of
4711 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4712 iterator within the CONSTRUCTOR which points to the initializer to process.
4713 FIRST_INITIALIZER_P is true if this is the first initializer of the
4714 CONSTRUCTOR node. */
4717 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4719 tree init
= d
->cur
->value
;
4721 /* A non-aggregate type is always initialized with a single
4723 if (!CP_AGGREGATE_TYPE_P (type
))
4725 /* It is invalid to initialize a non-aggregate type with a
4726 brace-enclosed initializer.
4727 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4728 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4729 a CONSTRUCTOR (with a record type). */
4730 if (TREE_CODE (init
) == CONSTRUCTOR
4731 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
4733 error ("braces around scalar initializer for type %qT", type
);
4734 init
= error_mark_node
;
4743 All implicit type conversions (clause _conv_) are considered when
4744 initializing the aggregate member with an initializer from an
4745 initializer-list. If the initializer can initialize a member,
4746 the member is initialized. Otherwise, if the member is itself a
4747 non-empty subaggregate, brace elision is assumed and the
4748 initializer is considered for the initialization of the first
4749 member of the subaggregate. */
4750 if (TREE_CODE (init
) != CONSTRUCTOR
4751 && can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
))
4757 /* [dcl.init.string]
4759 A char array (whether plain char, signed char, or unsigned char)
4760 can be initialized by a string-literal (optionally enclosed in
4761 braces); a wchar_t array can be initialized by a wide
4762 string-literal (optionally enclosed in braces). */
4763 if (TREE_CODE (type
) == ARRAY_TYPE
4764 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4766 tree str_init
= init
;
4768 /* Strip one level of braces if and only if they enclose a single
4769 element (as allowed by [dcl.init.string]). */
4770 if (!first_initializer_p
4771 && TREE_CODE (str_init
) == CONSTRUCTOR
4772 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
4774 str_init
= VEC_index (constructor_elt
,
4775 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
4778 /* If it's a string literal, then it's the initializer for the array
4779 as a whole. Otherwise, continue with normal initialization for
4780 array types (one value per array element). */
4781 if (TREE_CODE (str_init
) == STRING_CST
)
4788 /* The following cases are about aggregates. If we are not within a full
4789 initializer already, and there is not a CONSTRUCTOR, it means that there
4790 is a missing set of braces (that is, we are processing the case for
4791 which reshape_init exists). */
4792 if (!first_initializer_p
)
4794 if (TREE_CODE (init
) == CONSTRUCTOR
)
4796 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
4797 /* There is no need to reshape pointer-to-member function
4798 initializers, as they are always constructed correctly
4799 by the front end. */
4801 else if (COMPOUND_LITERAL_P (init
))
4802 /* For a nested compound literal, there is no need to reshape since
4803 brace elision is not allowed. Even if we decided to allow it,
4804 we should add a call to reshape_init in finish_compound_literal,
4805 before calling digest_init, so changing this code would still
4806 not be necessary. */
4807 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
4811 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
4812 return reshape_init (type
, init
);
4816 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
4820 /* Dispatch to specialized routines. */
4821 if (CLASS_TYPE_P (type
))
4822 return reshape_init_class (type
, d
, first_initializer_p
);
4823 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4824 return reshape_init_array (type
, d
);
4825 else if (TREE_CODE (type
) == VECTOR_TYPE
)
4826 return reshape_init_vector (type
, d
);
4831 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4832 brace-enclosed aggregate initializer.
4834 INIT is the CONSTRUCTOR containing the list of initializers describing
4835 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4836 It may not presently match the shape of the TYPE; for example:
4838 struct S { int a; int b; };
4839 struct S a[] = { 1, 2, 3, 4 };
4841 Here INIT will hold a VEC of four elements, rather than a
4842 VEC of two elements, each itself a VEC of two elements. This
4843 routine transforms INIT from the former form into the latter. The
4844 revised CONSTRUCTOR node is returned. */
4847 reshape_init (tree type
, tree init
)
4849 VEC(constructor_elt
, gc
) *v
;
4853 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
4855 v
= CONSTRUCTOR_ELTS (init
);
4857 /* An empty constructor does not need reshaping, and it is always a valid
4859 if (VEC_empty (constructor_elt
, v
))
4862 /* Recurse on this CONSTRUCTOR. */
4863 d
.cur
= VEC_index (constructor_elt
, v
, 0);
4864 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
4866 new_init
= reshape_init_r (type
, &d
, true);
4867 if (new_init
== error_mark_node
)
4868 return error_mark_node
;
4870 /* Make sure all the element of the constructor were used. Otherwise,
4871 issue an error about exceeding initializers. */
4873 error ("too many initializers for %qT", type
);
4878 /* Verify INIT (the initializer for DECL), and record the
4879 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4880 grok_reference_init.
4882 If the return value is non-NULL, it is an expression that must be
4883 evaluated dynamically to initialize DECL. */
4886 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4888 tree type
= TREE_TYPE (decl
);
4889 tree init_code
= NULL
;
4891 /* Things that are going to be initialized need to have complete
4893 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4895 if (type
== error_mark_node
)
4896 /* We will have already complained. */
4899 if (TREE_CODE (type
) == ARRAY_TYPE
)
4901 tree element_type
= TREE_TYPE (type
);
4903 /* The array type itself need not be complete, because the
4904 initializer may tell us how many elements are in the array.
4905 But, the elements of the array must be complete. */
4906 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
4908 error ("elements of array %q#D have incomplete type", decl
);
4911 /* It is not valid to initialize a VLA. */
4913 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
4914 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
4916 error ("variable-sized object %qD may not be initialized", decl
);
4920 else if (!COMPLETE_TYPE_P (type
))
4922 error ("%qD has incomplete type", decl
);
4923 TREE_TYPE (decl
) = error_mark_node
;
4927 /* There is no way to make a variable-sized class type in GNU C++. */
4928 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
4930 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
4932 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
4933 if (SCALAR_TYPE_P (type
))
4937 error ("scalar object %qD requires one element in initializer",
4939 TREE_TYPE (decl
) = error_mark_node
;
4943 else if ((cxx_dialect
== cxx98
) && !CP_AGGREGATE_TYPE_P (type
))
4945 /* A non-aggregate that is not a scalar cannot be initialized
4946 via an initializer-list in C++98. */
4947 error ("braces around initializer for non-aggregate type %qT",
4949 TREE_TYPE (decl
) = error_mark_node
;
4954 if (TREE_CODE (decl
) == CONST_DECL
)
4956 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
4958 DECL_INITIAL (decl
) = init
;
4960 gcc_assert (init
!= NULL_TREE
);
4963 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4964 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4967 /* Do not reshape constructors of vectors (they don't need to be
4969 if (TREE_CODE (init
) == CONSTRUCTOR
4970 && !COMPOUND_LITERAL_P (init
)
4971 && !TREE_TYPE (init
)) /* ptrmemfunc */
4973 init
= reshape_init (type
, init
);
4975 if ((*targetm
.vector_opaque_p
) (type
))
4977 error ("opaque vector types cannot be initialized");
4978 init
= error_mark_node
;
4982 /* If DECL has an array type without a specific bound, deduce the
4983 array size from the initializer. */
4984 maybe_deduce_size_from_array_init (decl
, init
);
4985 type
= TREE_TYPE (decl
);
4986 if (type
== error_mark_node
)
4989 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4991 if (TREE_CODE (type
) == ARRAY_TYPE
)
4992 goto initialize_aggr
;
4993 else if (TREE_CODE (init
) == CONSTRUCTOR
)
4995 if (TYPE_NON_AGGREGATE_CLASS (type
))
4997 error ("%qD must be initialized by constructor, "
5000 init
= error_mark_node
;
5003 goto dont_use_constructor
;
5007 int saved_stmts_are_full_exprs_p
;
5010 saved_stmts_are_full_exprs_p
= 0;
5011 if (building_stmt_tree ())
5013 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5014 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5016 init
= build_aggr_init (decl
, init
, flags
);
5017 if (building_stmt_tree ())
5018 current_stmt_tree ()->stmts_are_full_exprs_p
=
5019 saved_stmts_are_full_exprs_p
;
5025 dont_use_constructor
:
5026 if (TREE_CODE (init
) != TREE_VEC
)
5028 init_code
= store_init_value (decl
, init
);
5029 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5030 && DECL_INITIAL (decl
)
5031 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5032 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5033 warning (0, "array %qD initialized by parenthesized string literal %qE",
5034 decl
, DECL_INITIAL (decl
));
5039 else if (DECL_EXTERNAL (decl
))
5041 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
5042 goto initialize_aggr
;
5043 else if (IS_AGGR_TYPE (type
))
5045 tree core_type
= strip_array_types (type
);
5047 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
5048 error ("structure %qD with uninitialized const members", decl
);
5049 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
5050 error ("structure %qD with uninitialized reference members", decl
);
5052 check_for_uninitialized_const_var (decl
);
5055 check_for_uninitialized_const_var (decl
);
5057 if (init
&& init
!= error_mark_node
)
5058 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5063 /* If DECL is not a local variable, give it RTL. */
5066 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5068 int toplev
= toplevel_bindings_p ();
5070 const char *filename
;
5072 /* Set the DECL_ASSEMBLER_NAME for the object. */
5075 /* The `register' keyword, when used together with an
5076 asm-specification, indicates that the variable should be
5077 placed in a particular register. */
5078 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5080 set_user_assembler_name (decl
, asmspec
);
5081 DECL_HARD_REGISTER (decl
) = 1;
5085 if (TREE_CODE (decl
) == FUNCTION_DECL
5086 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5087 set_builtin_user_assembler_name (decl
, asmspec
);
5088 set_user_assembler_name (decl
, asmspec
);
5092 /* Handle non-variables up front. */
5093 if (TREE_CODE (decl
) != VAR_DECL
)
5095 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5099 /* If we see a class member here, it should be a static data
5101 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5103 gcc_assert (TREE_STATIC (decl
));
5104 /* An in-class declaration of a static data member should be
5105 external; it is only a declaration, and not a definition. */
5106 if (init
== NULL_TREE
)
5107 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5110 /* We don't create any RTL for local variables. */
5111 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5114 /* We defer emission of local statics until the corresponding
5115 DECL_EXPR is expanded. */
5116 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5118 /* We try to defer namespace-scope static constants so that they are
5119 not emitted into the object file unnecessarily. */
5120 filename
= input_filename
;
5121 if (!DECL_VIRTUAL_P (decl
)
5122 && TREE_READONLY (decl
)
5123 && DECL_INITIAL (decl
) != NULL_TREE
5124 && DECL_INITIAL (decl
) != error_mark_node
5126 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5128 && !TREE_PUBLIC (decl
))
5130 /* Fool with the linkage of static consts according to #pragma
5132 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5133 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5135 TREE_PUBLIC (decl
) = 1;
5136 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5141 /* Likewise for template instantiations. */
5142 else if (DECL_LANG_SPECIFIC (decl
)
5143 && DECL_IMPLICIT_INSTANTIATION (decl
))
5146 /* If we're not deferring, go ahead and assemble the variable. */
5148 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5151 /* walk_tree helper for wrap_temporary_cleanups, below. */
5154 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5156 if (TYPE_P (*stmt_p
))
5162 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5164 tree guard
= (tree
)data
;
5165 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5167 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5168 /* Tell honor_protect_cleanup_actions to handle this as a separate
5170 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5172 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5178 /* We're initializing a local variable which has a cleanup GUARD. If there
5179 are any temporaries used in the initializer INIT of this variable, we
5180 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5181 variable will be cleaned up properly if one of them throws.
5183 Unfortunately, there's no way to express this properly in terms of
5184 nesting, as the regions for the temporaries overlap the region for the
5185 variable itself; if there are two temporaries, the variable needs to be
5186 the first thing destroyed if either of them throws. However, we only
5187 want to run the variable's cleanup if it actually got constructed. So
5188 we need to guard the temporary cleanups with the variable's cleanup if
5189 they are run on the normal path, but not if they are run on the
5190 exceptional path. We implement this by telling
5191 honor_protect_cleanup_actions to strip the variable cleanup from the
5192 exceptional path. */
5195 wrap_temporary_cleanups (tree init
, tree guard
)
5197 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5200 /* Generate code to initialize DECL (a local variable). */
5203 initialize_local_var (tree decl
, tree init
)
5205 tree type
= TREE_TYPE (decl
);
5209 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5210 || TREE_CODE (decl
) == RESULT_DECL
);
5211 gcc_assert (!TREE_STATIC (decl
));
5213 if (DECL_SIZE (decl
) == NULL_TREE
)
5215 /* If we used it already as memory, it must stay in memory. */
5216 DECL_INITIAL (decl
) = NULL_TREE
;
5217 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5221 if (type
== error_mark_node
)
5224 /* Compute and store the initial value. */
5225 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5227 /* Generate a cleanup, if necessary. */
5228 cleanup
= cxx_maybe_build_cleanup (decl
);
5230 /* Perform the initialization. */
5233 int saved_stmts_are_full_exprs_p
;
5235 /* If we're only initializing a single object, guard the destructors
5236 of any temporaries used in its initializer with its destructor.
5237 This isn't right for arrays because each element initialization is
5238 a full-expression. */
5239 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5240 wrap_temporary_cleanups (init
, cleanup
);
5242 gcc_assert (building_stmt_tree ());
5243 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5244 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5245 finish_expr_stmt (init
);
5246 current_stmt_tree ()->stmts_are_full_exprs_p
=
5247 saved_stmts_are_full_exprs_p
;
5250 /* Set this to 0 so we can tell whether an aggregate which was
5251 initialized was ever used. Don't do this if it has a
5252 destructor, so we don't complain about the 'resource
5253 allocation is initialization' idiom. Now set
5254 attribute((unused)) on types so decls of that type will be
5255 marked used. (see TREE_USED, above.) */
5256 if (TYPE_NEEDS_CONSTRUCTING (type
)
5258 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5259 && DECL_NAME (decl
))
5260 TREE_USED (decl
) = 0;
5261 else if (already_used
)
5262 TREE_USED (decl
) = 1;
5265 finish_decl_cleanup (decl
, cleanup
);
5268 /* DECL is a VAR_DECL for a compiler-generated variable with static
5269 storage duration (like a virtual table) whose initializer is a
5270 compile-time constant. INIT must be either a TREE_LIST of values,
5271 or a CONSTRUCTOR. Initialize the variable and provide it to the
5275 initialize_artificial_var (tree decl
, tree init
)
5277 gcc_assert (DECL_ARTIFICIAL (decl
));
5278 if (TREE_CODE (init
) == TREE_LIST
)
5279 init
= build_constructor_from_list (NULL_TREE
, init
);
5280 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5281 DECL_INITIAL (decl
) = init
;
5282 DECL_INITIALIZED_P (decl
) = 1;
5283 determine_visibility (decl
);
5284 layout_var_decl (decl
);
5285 maybe_commonize_var (decl
);
5286 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5289 /* INIT is the initializer for a variable, as represented by the
5290 parser. Returns true iff INIT is value-dependent. */
5293 value_dependent_init_p (tree init
)
5295 if (TREE_CODE (init
) == TREE_LIST
)
5296 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5297 return any_value_dependent_elements_p (init
);
5298 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5299 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5301 VEC(constructor_elt
, gc
) *elts
;
5305 elts
= CONSTRUCTOR_ELTS (init
);
5306 nelts
= VEC_length (constructor_elt
, elts
);
5307 for (i
= 0; i
< nelts
; ++i
)
5308 if (value_dependent_init_p (VEC_index (constructor_elt
,
5313 /* It must be a simple expression, e.g., int i = 3; */
5314 return value_dependent_expression_p (init
);
5319 /* Finish processing of a declaration;
5320 install its line number and initial value.
5321 If the length of an array type is not known before,
5322 it must be determined now, from the initial value, or it is an error.
5324 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5325 true, then INIT is an integral constant expression.
5327 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5328 if the (init) syntax was used. */
5331 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5332 tree asmspec_tree
, int flags
)
5336 const char *asmspec
= NULL
;
5337 int was_readonly
= 0;
5338 bool var_definition_p
= false;
5339 int saved_processing_template_decl
;
5341 if (decl
== error_mark_node
)
5346 error ("assignment (not initialization) in declaration");
5350 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5351 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5352 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5354 type
= TREE_TYPE (decl
);
5355 if (type
== error_mark_node
)
5358 /* Assume no cleanup is required. */
5359 cleanup
= NULL_TREE
;
5360 saved_processing_template_decl
= processing_template_decl
;
5362 /* If a name was specified, get the string. */
5363 if (global_scope_p (current_binding_level
))
5364 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5365 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5366 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5368 if (current_class_type
5369 && CP_DECL_CONTEXT (decl
) == current_class_type
5370 && TYPE_BEING_DEFINED (current_class_type
)
5371 && (DECL_INITIAL (decl
) || init
))
5372 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5374 if (processing_template_decl
)
5376 bool type_dependent_p
;
5378 /* Add this declaration to the statement-tree. */
5379 if (at_function_scope_p ())
5380 add_decl_expr (decl
);
5382 type_dependent_p
= dependent_type_p (type
);
5384 if (init
&& init_const_expr_p
)
5386 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5387 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5388 TREE_CONSTANT (decl
) = 1;
5391 /* Generally, initializers in templates are expanded when the
5392 template is instantiated. But, if DECL is an integral
5393 constant static data member, then it can be used in future
5394 integral constant expressions, and its value must be
5397 && DECL_CLASS_SCOPE_P (decl
)
5398 && DECL_INTEGRAL_CONSTANT_VAR_P (decl
)
5399 && !type_dependent_p
5400 && !value_dependent_init_p (init
)))
5403 DECL_INITIAL (decl
) = init
;
5404 if (TREE_CODE (decl
) == VAR_DECL
5405 && !DECL_PRETTY_FUNCTION_P (decl
)
5406 && !type_dependent_p
)
5407 maybe_deduce_size_from_array_init (decl
, init
);
5411 if (TREE_CODE (init
) == TREE_LIST
)
5413 /* If the parenthesized-initializer form was used (e.g.,
5414 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5415 arguments. (There is generally only one.) We convert them
5418 for (; list
; list
= TREE_CHAIN (list
))
5420 tree elt
= TREE_VALUE (list
);
5421 TREE_VALUE (list
) = fold_non_dependent_expr (elt
);
5425 init
= fold_non_dependent_expr (init
);
5426 processing_template_decl
= 0;
5429 /* Take care of TYPE_DECLs up front. */
5430 if (TREE_CODE (decl
) == TYPE_DECL
)
5432 if (type
!= error_mark_node
5433 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
5435 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
5436 warning (0, "shadowing previous type declaration of %q#D", decl
);
5437 set_identifier_type_value (DECL_NAME (decl
), decl
);
5440 /* If we have installed this as the canonical typedef for this
5441 type, and that type has not been defined yet, delay emitting
5442 the debug information for it, as we will emit it later. */
5443 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
5444 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
5445 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
5447 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
5452 /* A reference will be modified here, as it is initialized. */
5453 if (! DECL_EXTERNAL (decl
)
5454 && TREE_READONLY (decl
)
5455 && TREE_CODE (type
) == REFERENCE_TYPE
)
5458 TREE_READONLY (decl
) = 0;
5461 if (TREE_CODE (decl
) == VAR_DECL
)
5463 /* Only PODs can have thread-local storage. Other types may require
5464 various kinds of non-trivial initialization. */
5465 if (DECL_THREAD_LOCAL_P (decl
) && !pod_type_p (TREE_TYPE (decl
)))
5466 error ("%qD cannot be thread-local because it has non-POD type %qT",
5467 decl
, TREE_TYPE (decl
));
5468 /* If this is a local variable that will need a mangled name,
5469 register it now. We must do this before processing the
5470 initializer for the variable, since the initialization might
5471 require a guard variable, and since the mangled name of the
5472 guard variable will depend on the mangled name of this
5474 if (DECL_FUNCTION_SCOPE_P (decl
)
5475 && TREE_STATIC (decl
)
5476 && !DECL_ARTIFICIAL (decl
))
5477 push_local_name (decl
);
5478 /* Convert the initializer to the type of DECL, if we have not
5479 already initialized DECL. */
5480 if (!DECL_INITIALIZED_P (decl
)
5481 /* If !DECL_EXTERNAL then DECL is being defined. In the
5482 case of a static data member initialized inside the
5483 class-specifier, there can be an initializer even if DECL
5484 is *not* defined. */
5485 && (!DECL_EXTERNAL (decl
) || init
))
5487 if (TYPE_FOR_JAVA (type
) && IS_AGGR_TYPE (type
))
5490 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5491 /* Allow libjava/prims.cc define primitive classes. */
5492 if (init
!= NULL_TREE
5493 || jclass
== NULL_TREE
5494 || TREE_CODE (jclass
) != TYPE_DECL
5495 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
5496 || !same_type_ignoring_top_level_qualifiers_p
5497 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
5498 error ("Java object %qD not allocated with %<new%>", decl
);
5503 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
5504 if (init_const_expr_p
)
5506 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5507 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5508 TREE_CONSTANT (decl
) = 1;
5511 init
= check_initializer (decl
, init
, flags
, &cleanup
);
5512 /* Thread-local storage cannot be dynamically initialized. */
5513 if (DECL_THREAD_LOCAL_P (decl
) && init
)
5515 error ("%qD is thread-local and so cannot be dynamically "
5516 "initialized", decl
);
5520 /* Check that the initializer for a static data member was a
5521 constant. Although we check in the parser that the
5522 initializer is an integral constant expression, we do not
5523 simplify division-by-zero at the point at which it
5524 occurs. Therefore, in:
5526 struct S { static const int i = 7 / 0; };
5528 we issue an error at this point. It would
5529 probably be better to forbid division by zero in
5530 integral constant expressions. */
5531 if (DECL_EXTERNAL (decl
) && init
)
5533 error ("%qD cannot be initialized by a non-constant expression"
5534 " when being declared", decl
);
5535 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
5543 The memory occupied by any object of static storage
5544 duration is zero-initialized at program startup before
5545 any other initialization takes place.
5547 We cannot create an appropriate initializer until after
5548 the type of DECL is finalized. If DECL_INITIAL is set,
5549 then the DECL is statically initialized, and any
5550 necessary zero-initialization has already been performed. */
5551 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
5552 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
5553 /*nelts=*/NULL_TREE
,
5554 /*static_storage_p=*/true);
5555 /* Remember that the initialization for this variable has
5557 DECL_INITIALIZED_P (decl
) = 1;
5558 /* This declaration is the definition of this variable,
5559 unless we are initializing a static data member within
5560 the class specifier. */
5561 if (!DECL_EXTERNAL (decl
))
5562 var_definition_p
= true;
5564 /* If the variable has an array type, lay out the type, even if
5565 there is no initializer. It is valid to index through the
5566 array, and we must get TYPE_ALIGN set correctly on the array
5568 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5571 else if (TREE_CODE (decl
) == FIELD_DECL
5572 && TYPE_FOR_JAVA (type
) && IS_AGGR_TYPE (type
))
5573 error ("non-static data member %qD has Java class type", decl
);
5575 /* Add this declaration to the statement-tree. This needs to happen
5576 after the call to check_initializer so that the DECL_EXPR for a
5577 reference temp is added before the DECL_EXPR for the reference itself. */
5578 if (at_function_scope_p ())
5579 add_decl_expr (decl
);
5581 /* Let the middle end know about variables and functions -- but not
5582 static data members in uninstantiated class templates. */
5583 if (!saved_processing_template_decl
5584 && (TREE_CODE (decl
) == VAR_DECL
5585 || TREE_CODE (decl
) == FUNCTION_DECL
))
5587 if (TREE_CODE (decl
) == VAR_DECL
)
5589 layout_var_decl (decl
);
5590 maybe_commonize_var (decl
);
5593 /* This needs to happen after the linkage is set. */
5594 determine_visibility (decl
);
5596 if (var_definition_p
&& TREE_STATIC (decl
))
5598 /* If a TREE_READONLY variable needs initialization
5599 at runtime, it is no longer readonly and we need to
5600 avoid MEM_READONLY_P being set on RTL created for it. */
5603 if (TREE_READONLY (decl
))
5604 TREE_READONLY (decl
) = 0;
5607 else if (was_readonly
)
5608 TREE_READONLY (decl
) = 1;
5611 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
5613 /* Check for abstractness of the type. Notice that there is no
5614 need to strip array types here since the check for those types
5615 is already done within create_array_type_for_decl. */
5616 if (TREE_CODE (type
) == FUNCTION_TYPE
5617 || TREE_CODE (type
) == METHOD_TYPE
)
5618 abstract_virtuals_error (decl
, TREE_TYPE (type
));
5620 abstract_virtuals_error (decl
, type
);
5622 if (TREE_CODE (decl
) == FUNCTION_DECL
5623 || TREE_TYPE (decl
) == error_mark_node
)
5624 /* No initialization required. */
5626 else if (DECL_EXTERNAL (decl
)
5627 && ! (DECL_LANG_SPECIFIC (decl
)
5628 && DECL_NOT_REALLY_EXTERN (decl
)))
5631 DECL_INITIAL (decl
) = init
;
5633 /* A variable definition. */
5634 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5635 /* Initialize the local variable. */
5636 initialize_local_var (decl
, init
);
5638 /* If a variable is defined, and then a subsequent
5639 definition with external linkage is encountered, we will
5640 get here twice for the same variable. We want to avoid
5641 calling expand_static_init more than once. For variables
5642 that are not static data members, we can call
5643 expand_static_init only when we actually process the
5644 initializer. It is not legal to redeclare a static data
5645 member, so this issue does not arise in that case. */
5646 else if (var_definition_p
&& TREE_STATIC (decl
))
5647 expand_static_init (decl
, init
);
5650 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5651 reference, insert it in the statement-tree now. */
5653 push_cleanup (decl
, cleanup
, false);
5656 processing_template_decl
= saved_processing_template_decl
;
5659 TREE_READONLY (decl
) = 1;
5661 /* If this was marked 'used', be sure it will be output. */
5662 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
5663 mark_decl_referenced (decl
);
5666 /* This is here for a midend callback from c-common.c. */
5669 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
5671 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, asmspec_tree
, 0);
5674 /* Returns a declaration for a VAR_DECL as if:
5676 extern "C" TYPE NAME;
5678 had been seen. Used to create compiler-generated global
5682 declare_global_var (tree name
, tree type
)
5686 push_to_top_level ();
5687 decl
= build_decl (VAR_DECL
, name
, type
);
5688 TREE_PUBLIC (decl
) = 1;
5689 DECL_EXTERNAL (decl
) = 1;
5690 DECL_ARTIFICIAL (decl
) = 1;
5691 /* If the user has explicitly declared this variable (perhaps
5692 because the code we are compiling is part of a low-level runtime
5693 library), then it is possible that our declaration will be merged
5694 with theirs by pushdecl. */
5695 decl
= pushdecl (decl
);
5696 finish_decl (decl
, NULL_TREE
, NULL_TREE
);
5697 pop_from_top_level ();
5702 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5703 if "__cxa_atexit" is not being used) corresponding to the function
5704 to be called when the program exits. */
5707 get_atexit_fn_ptr_type (void)
5712 if (!atexit_fn_ptr_type_node
)
5714 if (flag_use_cxa_atexit
5715 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5716 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5717 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5719 /* The parameter to "atexit" is "void (*)(void)". */
5720 arg_types
= void_list_node
;
5722 fn_type
= build_function_type (void_type_node
, arg_types
);
5723 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
5726 return atexit_fn_ptr_type_node
;
5729 /* Returns a pointer to the `atexit' function. Note that if
5730 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5731 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5734 get_atexit_node (void)
5741 bool use_aeabi_atexit
;
5746 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5748 /* The declaration for `__cxa_atexit' is:
5750 int __cxa_atexit (void (*)(void *), void *, void *)
5752 We build up the argument types and then then function type
5755 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
5756 /* First, build the pointer-to-function type for the first
5758 fn_ptr_type
= get_atexit_fn_ptr_type ();
5759 /* Then, build the rest of the argument types. */
5760 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5761 if (use_aeabi_atexit
)
5763 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5764 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5768 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5769 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5771 /* And the final __cxa_atexit type. */
5772 fn_type
= build_function_type (integer_type_node
, arg_types
);
5773 fn_ptr_type
= build_pointer_type (fn_type
);
5774 if (use_aeabi_atexit
)
5775 name
= "__aeabi_atexit";
5777 name
= "__cxa_atexit";
5781 /* The declaration for `atexit' is:
5783 int atexit (void (*)());
5785 We build up the argument types and then then function type
5787 fn_ptr_type
= get_atexit_fn_ptr_type ();
5788 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5789 /* Build the final atexit type. */
5790 fn_type
= build_function_type (integer_type_node
, arg_types
);
5794 /* Now, build the function declaration. */
5795 push_lang_context (lang_name_c
);
5796 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5797 mark_used (atexit_fndecl
);
5798 pop_lang_context ();
5799 atexit_node
= decay_conversion (atexit_fndecl
);
5804 /* Returns the __dso_handle VAR_DECL. */
5807 get_dso_handle_node (void)
5809 if (dso_handle_node
)
5810 return dso_handle_node
;
5812 /* Declare the variable. */
5813 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5816 return dso_handle_node
;
5819 /* Begin a new function with internal linkage whose job will be simply
5820 to destroy some particular variable. */
5822 static GTY(()) int start_cleanup_cnt
;
5825 start_cleanup_fn (void)
5830 bool use_cxa_atexit
= flag_use_cxa_atexit
5831 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
5833 push_to_top_level ();
5835 /* No need to mangle this. */
5836 push_lang_context (lang_name_c
);
5838 /* Build the name of the function. */
5839 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5840 /* Build the function declaration. */
5841 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
5842 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5843 /* It's a function with internal linkage, generated by the
5845 TREE_PUBLIC (fndecl
) = 0;
5846 DECL_ARTIFICIAL (fndecl
) = 1;
5847 /* Make the function `inline' so that it is only emitted if it is
5848 actually needed. It is unlikely that it will be inlined, since
5849 it is only called via a function pointer, but we avoid unnecessary
5850 emissions this way. */
5851 DECL_INLINE (fndecl
) = 1;
5852 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5853 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5854 /* Build the parameter. */
5859 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5860 DECL_CONTEXT (parmdecl
) = fndecl
;
5861 TREE_USED (parmdecl
) = 1;
5862 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5866 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5868 pop_lang_context ();
5870 return current_function_decl
;
5873 /* Finish the cleanup function begun by start_cleanup_fn. */
5876 end_cleanup_fn (void)
5878 expand_or_defer_fn (finish_function (0));
5880 pop_from_top_level ();
5883 /* Generate code to handle the destruction of DECL, an object with
5884 static storage duration. */
5887 register_dtor_fn (tree decl
)
5896 type
= TREE_TYPE (decl
);
5897 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
5898 return void_zero_node
;
5900 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
5901 a class object, we can just pass the destructor to
5902 "__cxa_atexit"; we don't have to build a temporary function to do
5904 use_dtor
= (flag_use_cxa_atexit
5905 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
5906 && CLASS_TYPE_P (type
));
5911 /* Find the destructor. */
5912 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
5913 gcc_assert (idx
>= 0);
5914 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
5915 /* Make sure it is accessible. */
5916 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
5920 /* Call build_cleanup before we enter the anonymous function so
5921 that any access checks will be done relative to the current
5922 scope, rather than the scope of the anonymous function. */
5923 build_cleanup (decl
);
5925 /* Now start the function. */
5926 cleanup
= start_cleanup_fn ();
5928 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5929 to the original function, rather than the anonymous one. That
5930 will make the back end think that nested functions are in use,
5931 which causes confusion. */
5932 push_deferring_access_checks (dk_no_check
);
5933 fcall
= build_cleanup (decl
);
5934 pop_deferring_access_checks ();
5936 /* Create the body of the anonymous function. */
5937 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5938 finish_expr_stmt (fcall
);
5939 finish_compound_stmt (compound_stmt
);
5943 /* Call atexit with the cleanup function. */
5944 mark_used (cleanup
);
5945 cleanup
= build_address (cleanup
);
5946 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5952 /* We must convert CLEANUP to the type that "__cxa_atexit"
5954 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
5955 /* "__cxa_atexit" will pass the address of DECL to the
5956 cleanup function. */
5958 addr
= build_address (decl
);
5959 /* The declared type of the parameter to "__cxa_atexit" is
5960 "void *". For plain "T*", we could just let the
5961 machinery in build_function_call convert it -- but if the
5962 type is "cv-qualified T *", then we need to convert it
5963 before passing it in, to avoid spurious errors. */
5964 addr
= build_nop (ptr_type_node
, addr
);
5967 /* Since the cleanup functions we build ignore the address
5968 they're given, there's no reason to pass the actual address
5969 in, and, in general, it's cheaper to pass NULL than any
5971 addr
= null_pointer_node
;
5972 args
= tree_cons (NULL_TREE
,
5973 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5975 if (targetm
.cxx
.use_aeabi_atexit ())
5977 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5978 args
= tree_cons (NULL_TREE
, addr
, args
);
5982 args
= tree_cons (NULL_TREE
, addr
, args
);
5983 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5987 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5988 return build_function_call (get_atexit_node (), args
);
5991 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5992 is its initializer. Generate code to handle the construction
5993 and destruction of DECL. */
5996 expand_static_init (tree decl
, tree init
)
5998 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5999 gcc_assert (TREE_STATIC (decl
));
6001 /* Some variables require no initialization. */
6003 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
6004 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6007 if (DECL_FUNCTION_SCOPE_P (decl
))
6009 /* Emit code to perform this initialization but once. */
6010 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6011 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6012 tree guard
, guard_addr
;
6013 tree acquire_fn
, release_fn
, abort_fn
;
6016 /* Emit code to perform this initialization but once. This code
6019 static <type> guard;
6020 if (!guard.first_byte) {
6021 if (__cxa_guard_acquire (&guard)) {
6024 // Do initialization.
6025 flag = true; __cxa_guard_release (&guard);
6026 // Register variable for destruction at end of program.
6028 if (!flag) __cxa_guard_abort (&guard);
6032 Note that the `flag' variable is only set to 1 *after* the
6033 initialization is complete. This ensures that an exception,
6034 thrown during the construction, will cause the variable to
6035 reinitialized when we pass through this code again, as per:
6039 If the initialization exits by throwing an exception, the
6040 initialization is not complete, so it will be tried again
6041 the next time control enters the declaration.
6043 This process should be thread-safe, too; multiple threads
6044 should not be able to initialize the variable more than
6047 /* Create the guard variable. */
6048 guard
= get_guard (decl
);
6050 /* This optimization isn't safe on targets with relaxed memory
6051 consistency. On such targets we force synchronization in
6052 __cxa_guard_acquire. */
6053 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6055 /* Begin the conditional initialization. */
6056 if_stmt
= begin_if_stmt ();
6057 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6058 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6061 if (flag_threadsafe_statics
)
6063 guard_addr
= build_address (guard
);
6065 acquire_fn
= get_identifier ("__cxa_guard_acquire");
6066 release_fn
= get_identifier ("__cxa_guard_release");
6067 abort_fn
= get_identifier ("__cxa_guard_abort");
6068 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
6070 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
6072 tree vfntype
= build_function_type (void_type_node
, argtypes
);
6073 acquire_fn
= push_library_fn
6074 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
6075 release_fn
= push_library_fn (release_fn
, vfntype
);
6076 abort_fn
= push_library_fn (abort_fn
, vfntype
);
6080 release_fn
= identifier_global_value (release_fn
);
6081 abort_fn
= identifier_global_value (abort_fn
);
6084 inner_if_stmt
= begin_if_stmt ();
6085 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6088 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6089 begin
= get_target_expr (boolean_false_node
);
6090 flag
= TARGET_EXPR_SLOT (begin
);
6092 TARGET_EXPR_CLEANUP (begin
)
6093 = build3 (COND_EXPR
, void_type_node
, flag
,
6095 build_call_n (abort_fn
, 1, guard_addr
));
6096 CLEANUP_EH_ONLY (begin
) = 1;
6098 /* Do the initialization itself. */
6099 init
= add_stmt_to_compound (begin
, init
);
6100 init
= add_stmt_to_compound
6101 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6102 init
= add_stmt_to_compound
6103 (init
, build_call_n (release_fn
, 1, guard_addr
));
6106 init
= add_stmt_to_compound (init
, set_guard (guard
));
6108 /* Use atexit to register a function for destroying this static
6110 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6112 finish_expr_stmt (init
);
6114 if (flag_threadsafe_statics
)
6116 finish_compound_stmt (inner_then_clause
);
6117 finish_then_clause (inner_if_stmt
);
6118 finish_if_stmt (inner_if_stmt
);
6121 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6123 finish_compound_stmt (then_clause
);
6124 finish_then_clause (if_stmt
);
6125 finish_if_stmt (if_stmt
);
6129 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6133 /* Make TYPE a complete type based on INITIAL_VALUE.
6134 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6135 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6136 3 if the initializer list is empty (in pedantic mode). */
6139 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6142 tree type
, elt_type
;
6146 unsigned HOST_WIDE_INT i
;
6149 /* An array of character type can be initialized from a
6150 brace-enclosed string constant.
6152 FIXME: this code is duplicated from reshape_init. Probably
6153 we should just call reshape_init here? */
6154 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6155 && TREE_CODE (initial_value
) == CONSTRUCTOR
6156 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6158 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6159 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6161 if (TREE_CODE (value
) == STRING_CST
6162 && VEC_length (constructor_elt
, v
) == 1)
6163 initial_value
= value
;
6166 /* If any of the elements are parameter packs, we can't actually
6167 complete this type now because the array size is dependent. */
6168 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6170 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6173 if (PACK_EXPANSION_P (value
))
6179 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6181 /* We can create the array before the element type is complete, which
6182 means that we didn't have these two bits set in the original type
6183 either. In completing the type, we are expected to propagate these
6184 bits. See also complete_type which does the same thing for arrays
6187 if (TYPE_DOMAIN (type
))
6189 elt_type
= TREE_TYPE (type
);
6190 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6191 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6192 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6198 /* Return zero if something is declared to be a member of type
6199 CTYPE when in the context of CUR_TYPE. STRING is the error
6200 message to print in that case. Otherwise, quietly return 1. */
6203 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6205 if (ctype
&& ctype
!= cur_type
)
6207 if (flags
== DTOR_FLAG
)
6208 error ("destructor for alien class %qT cannot be a member", ctype
);
6210 error ("constructor for alien class %qT cannot be a member", ctype
);
6216 /* Subroutine of `grokdeclarator'. */
6218 /* Generate errors possibly applicable for a given set of specifiers.
6219 This is for ARM $7.1.2. */
6222 bad_specifiers (tree object
,
6231 error ("%qD declared as a %<virtual%> %s", object
, type
);
6233 error ("%qD declared as an %<inline%> %s", object
, type
);
6235 error ("%<const%> and %<volatile%> function specifiers on "
6236 "%qD invalid in %s declaration",
6239 error ("%q+D declared as a friend", object
);
6241 && (TREE_CODE (object
) == TYPE_DECL
6242 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
6243 && !TYPE_REFFN_P (TREE_TYPE (object
))
6244 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
6245 error ("%q+D declared with an exception specification", object
);
6248 /* DECL is a member function or static data member and is presently
6249 being defined. Check that the definition is taking place in a
6253 check_class_member_definition_namespace (tree decl
)
6255 /* These checks only apply to member functions and static data
6257 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
6258 || TREE_CODE (decl
) == VAR_DECL
);
6259 /* We check for problems with specializations in pt.c in
6260 check_specialization_namespace, where we can issue better
6262 if (processing_specialization
)
6264 /* There are no restrictions on the placement of
6265 explicit instantiations. */
6266 if (processing_explicit_instantiation
)
6270 A member function definition that appears outside of the
6271 class definition shall appear in a namespace scope enclosing
6272 the class definition.
6276 The definition for a static data member shall appear in a
6277 namespace scope enclosing the member's class definition. */
6278 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
6279 pedwarn ("definition of %qD is not in namespace enclosing %qT",
6280 decl
, DECL_CONTEXT (decl
));
6283 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6284 METHOD_TYPE for a non-static member function; QUALS are the
6285 cv-qualifiers that apply to the function. */
6288 build_this_parm (tree type
, cp_cv_quals quals
)
6293 cp_cv_quals this_quals
;
6295 this_type
= TREE_VALUE (TYPE_ARG_TYPES (type
));
6296 /* The `this' parameter is implicitly `const'; it cannot be
6298 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
6299 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
6300 parm
= build_artificial_parm (this_identifier
, qual_type
);
6301 cp_apply_type_quals_to_decl (this_quals
, parm
);
6305 /* CTYPE is class type, or null if non-class.
6306 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6308 DECLARATOR is the function's name.
6309 PARMS is a chain of PARM_DECLs for the function.
6310 VIRTUALP is truthvalue of whether the function is virtual or not.
6311 FLAGS are to be passed through to `grokclassfn'.
6312 QUALS are qualifiers indicating whether the function is `const'
6314 RAISES is a list of exceptions that this function can raise.
6315 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6316 not look, and -1 if we should not call `grokclassfn' at all.
6318 SFK is the kind of special function (if any) for the new function.
6320 Returns `NULL_TREE' if something goes wrong, after issuing
6321 applicable error messages. */
6324 grokfndecl (tree ctype
,
6328 tree orig_declarator
,
6330 enum overload_flags flags
,
6337 special_function_kind sfk
,
6344 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
6348 type
= build_exception_variant (type
, raises
);
6350 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
6351 if (TREE_CODE (type
) == METHOD_TYPE
)
6354 parm
= build_this_parm (type
, quals
);
6355 TREE_CHAIN (parm
) = parms
;
6358 DECL_ARGUMENTS (decl
) = parms
;
6359 /* Propagate volatile out from type to decl. */
6360 if (TYPE_VOLATILE (type
))
6361 TREE_THIS_VOLATILE (decl
) = 1;
6363 /* Setup decl according to sfk. */
6366 case sfk_constructor
:
6367 case sfk_copy_constructor
:
6368 DECL_CONSTRUCTOR_P (decl
) = 1;
6370 case sfk_destructor
:
6371 DECL_DESTRUCTOR_P (decl
) = 1;
6377 /* If pointers to member functions use the least significant bit to
6378 indicate whether a function is virtual, ensure a pointer
6379 to this function will have that bit clear. */
6380 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
6381 && TREE_CODE (type
) == METHOD_TYPE
6382 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
6383 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
6386 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
6390 ("defining explicit specialization %qD in friend declaration",
6394 tree fns
= TREE_OPERAND (orig_declarator
, 0);
6395 tree args
= TREE_OPERAND (orig_declarator
, 1);
6397 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6399 /* Something like `template <class T> friend void f<T>()'. */
6400 error ("invalid use of template-id %qD in declaration "
6401 "of primary template",
6407 /* A friend declaration of the form friend void f<>(). Record
6408 the information in the TEMPLATE_ID_EXPR. */
6409 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
6411 if (TREE_CODE (fns
) == COMPONENT_REF
)
6413 /* Due to bison parser ickiness, we will have already looked
6414 up an operator_name or PFUNCNAME within the current class
6415 (see template_id in parse.y). If the current class contains
6416 such a name, we'll get a COMPONENT_REF here. Undo that. */
6418 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
6419 == current_class_type
);
6420 fns
= TREE_OPERAND (fns
, 1);
6422 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
6423 || TREE_CODE (fns
) == OVERLOAD
);
6424 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
6426 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
6427 if (TREE_PURPOSE (t
)
6428 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
6430 error ("default arguments are not allowed in declaration "
6431 "of friend template specialization %qD",
6438 error ("%<inline%> is not allowed in declaration of friend "
6439 "template specialization %qD",
6446 /* If this decl has namespace scope, set that up. */
6448 set_decl_namespace (decl
, in_namespace
, friendp
);
6450 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
6452 /* `main' and builtins have implicit 'C' linkage. */
6453 if ((MAIN_NAME_P (declarator
)
6454 || (IDENTIFIER_LENGTH (declarator
) > 10
6455 && IDENTIFIER_POINTER (declarator
)[0] == '_'
6456 && IDENTIFIER_POINTER (declarator
)[1] == '_'
6457 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
6458 && current_lang_name
== lang_name_cplusplus
6459 && ctype
== NULL_TREE
6460 /* NULL_TREE means global namespace. */
6461 && DECL_CONTEXT (decl
) == NULL_TREE
)
6462 SET_DECL_LANGUAGE (decl
, lang_c
);
6464 /* Should probably propagate const out from type to decl I bet (mrs). */
6467 DECL_STATIC_FUNCTION_P (decl
) = 1;
6468 DECL_CONTEXT (decl
) = ctype
;
6473 DECL_CONTEXT (decl
) = ctype
;
6475 check_class_member_definition_namespace (decl
);
6478 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6480 if (processing_template_decl
)
6481 error ("cannot declare %<::main%> to be a template");
6483 error ("cannot declare %<::main%> to be inline");
6485 error ("cannot declare %<::main%> to be static");
6490 /* Members of anonymous types and local classes have no linkage; make
6491 them internal. If a typedef is made later, this will be changed. */
6492 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
6493 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
6498 /* [basic.link]: A name with no linkage (notably, the name of a class
6499 or enumeration declared in a local scope) shall not be used to
6500 declare an entity with linkage.
6502 Only check this for public decls for now. See core 319, 389. */
6503 t
= no_linkage_check (TREE_TYPE (decl
),
6504 /*relaxed_p=*/false);
6507 if (TYPE_ANONYMOUS_P (t
))
6509 if (DECL_EXTERN_C_P (decl
))
6510 /* Allow this; it's pretty common in C. */;
6513 pedwarn ("non-local function %q#D uses anonymous type",
6515 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6516 pedwarn ("%q+#D does not refer to the unqualified "
6517 "type, so it is not used for linkage",
6522 pedwarn ("non-local function %q#D uses local type %qT", decl
, t
);
6526 TREE_PUBLIC (decl
) = publicp
;
6529 DECL_INTERFACE_KNOWN (decl
) = 1;
6530 DECL_NOT_REALLY_EXTERN (decl
) = 1;
6533 /* If the declaration was declared inline, mark it as such. */
6535 DECL_DECLARED_INLINE_P (decl
) = 1;
6536 /* We inline functions that are explicitly declared inline, or, when
6537 the user explicitly asks us to, all functions. */
6538 if (DECL_DECLARED_INLINE_P (decl
)
6539 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
6540 DECL_INLINE (decl
) = 1;
6542 DECL_EXTERNAL (decl
) = 1;
6543 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
6546 ? G_("static member function %qD cannot have cv-qualifier")
6547 : G_("non-member function %qD cannot have cv-qualifier"),
6549 quals
= TYPE_UNQUALIFIED
;
6552 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
6553 && !grok_op_properties (decl
, /*complain=*/true))
6556 if (ctype
&& decl_function_context (decl
))
6557 DECL_NO_STATIC_CHAIN (decl
) = 1;
6560 /* Make the init_value nonzero so pushdecl knows this is not
6561 tentative. error_mark_node is replaced later with the BLOCK. */
6562 DECL_INITIAL (decl
) = error_mark_node
;
6564 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
6565 TREE_NOTHROW (decl
) = 1;
6567 /* Caller will do the rest of this. */
6571 if (ctype
!= NULL_TREE
)
6572 grokclassfn (ctype
, decl
, flags
);
6574 decl
= check_explicit_specialization (orig_declarator
, decl
,
6577 4 * (friendp
!= 0));
6578 if (decl
== error_mark_node
)
6583 cplus_decl_attributes (&decl
, *attrlist
, 0);
6584 *attrlist
= NULL_TREE
;
6587 /* Check main's type after attributes have been applied. */
6588 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6590 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
6593 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
6595 error ("%<::main%> must return %<int%>");
6596 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
6597 TREE_TYPE (decl
) = newtype
;
6599 check_main_parameter_types (decl
);
6602 if (ctype
!= NULL_TREE
6603 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
6606 tree old_decl
= check_classfn (ctype
, decl
,
6607 (processing_template_decl
6608 > template_class_depth (ctype
))
6609 ? current_template_parms
6612 if (old_decl
== error_mark_node
)
6620 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
6621 /* Because grokfndecl is always supposed to return a
6622 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6623 here. We depend on our callers to figure out that its
6624 really a template that's being returned. */
6625 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
6627 if (DECL_STATIC_FUNCTION_P (old_decl
)
6628 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
6629 /* Remove the `this' parm added by grokclassfn.
6630 XXX Isn't this done in start_function, too? */
6631 revert_static_member_fn (decl
);
6632 if (DECL_ARTIFICIAL (old_decl
))
6634 error ("definition of implicitly-declared %qD", old_decl
);
6638 /* Since we've smashed OLD_DECL to its
6639 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6640 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
6641 decl
= DECL_TEMPLATE_RESULT (decl
);
6643 /* Attempt to merge the declarations. This can fail, in
6644 the case of some invalid specialization declarations. */
6645 pushed_scope
= push_scope (ctype
);
6646 ok
= duplicate_decls (decl
, old_decl
, friendp
);
6648 pop_scope (pushed_scope
);
6651 error ("no %q#D member function declared in class %qT",
6659 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
6662 if (ctype
== NULL_TREE
|| check
)
6666 DECL_VIRTUAL_P (decl
) = 1;
6671 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6672 the linkage that DECL will receive in the object file. */
6675 set_linkage_for_static_data_member (tree decl
)
6677 /* A static data member always has static storage duration and
6678 external linkage. Note that static data members are forbidden in
6679 local classes -- the only situation in which a class has
6680 non-external linkage. */
6681 TREE_PUBLIC (decl
) = 1;
6682 TREE_STATIC (decl
) = 1;
6683 /* For non-template classes, static data members are always put
6684 out in exactly those files where they are defined, just as
6685 with ordinary namespace-scope variables. */
6686 if (!processing_template_decl
)
6687 DECL_INTERFACE_KNOWN (decl
) = 1;
6690 /* Create a VAR_DECL named NAME with the indicated TYPE.
6692 If SCOPE is non-NULL, it is the class type or namespace containing
6693 the variable. If SCOPE is NULL, the variable should is created in
6694 the innermost enclosings scope. */
6697 grokvardecl (tree type
,
6699 const cp_decl_specifier_seq
*declspecs
,
6705 tree explicit_scope
;
6707 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
6709 /* Compute the scope in which to place the variable, but remember
6710 whether or not that scope was explicitly specified by the user. */
6711 explicit_scope
= scope
;
6714 /* An explicit "extern" specifier indicates a namespace-scope
6716 if (declspecs
->storage_class
== sc_extern
)
6717 scope
= current_namespace
;
6718 else if (!at_function_scope_p ())
6719 scope
= current_scope ();
6723 && (/* If the variable is a namespace-scope variable declared in a
6724 template, we need DECL_LANG_SPECIFIC. */
6725 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
6726 /* Similarly for namespace-scope variables with language linkage
6728 || (TREE_CODE (scope
) == NAMESPACE_DECL
6729 && current_lang_name
!= lang_name_cplusplus
)
6730 /* Similarly for static data members. */
6732 decl
= build_lang_decl (VAR_DECL
, name
, type
);
6734 decl
= build_decl (VAR_DECL
, name
, type
);
6736 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
6737 set_decl_namespace (decl
, explicit_scope
, 0);
6739 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
6741 if (declspecs
->storage_class
== sc_extern
)
6743 DECL_THIS_EXTERN (decl
) = 1;
6744 DECL_EXTERNAL (decl
) = !initialized
;
6747 if (DECL_CLASS_SCOPE_P (decl
))
6749 set_linkage_for_static_data_member (decl
);
6750 /* This function is only called with out-of-class definitions. */
6751 DECL_EXTERNAL (decl
) = 0;
6752 check_class_member_definition_namespace (decl
);
6754 /* At top level, either `static' or no s.c. makes a definition
6755 (perhaps tentative), and absence of `static' makes it public. */
6756 else if (toplevel_bindings_p ())
6758 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
6759 && (DECL_THIS_EXTERN (decl
) || ! constp
));
6760 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
6762 /* Not at top level, only `static' makes a static definition. */
6765 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
6766 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
6769 if (declspecs
->specs
[(int)ds_thread
])
6770 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
6772 if (TREE_PUBLIC (decl
))
6774 /* [basic.link]: A name with no linkage (notably, the name of a class
6775 or enumeration declared in a local scope) shall not be used to
6776 declare an entity with linkage.
6778 Only check this for public decls for now. */
6779 tree t
= no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false);
6782 if (TYPE_ANONYMOUS_P (t
))
6784 if (DECL_EXTERN_C_P (decl
))
6785 /* Allow this; it's pretty common in C. */
6789 /* DRs 132, 319 and 389 seem to indicate types with
6790 no linkage can only be used to declare extern "C"
6791 entities. Since it's not always an error in the
6792 ISO C++ 90 Standard, we only issue a warning. */
6793 warning (0, "non-local variable %q#D uses anonymous type",
6795 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6796 warning (0, "%q+#D does not refer to the unqualified "
6797 "type, so it is not used for linkage",
6802 warning (0, "non-local variable %q#D uses local type %qT", decl
, t
);
6806 DECL_INTERFACE_KNOWN (decl
) = 1;
6811 /* Create and return a canonical pointer to member function type, for
6812 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6815 build_ptrmemfunc_type (tree type
)
6819 tree unqualified_variant
= NULL_TREE
;
6821 if (type
== error_mark_node
)
6824 /* If a canonical type already exists for this type, use it. We use
6825 this method instead of type_hash_canon, because it only does a
6826 simple equality check on the list of field members. */
6828 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
6831 /* Make sure that we always have the unqualified pointer-to-member
6833 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6835 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
6837 t
= make_aggr_type (RECORD_TYPE
);
6838 xref_basetypes (t
, NULL_TREE
);
6840 /* Let the front end know this is a pointer to member function... */
6841 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
6842 /* ... and not really an aggregate. */
6843 SET_IS_AGGR_TYPE (t
, 0);
6845 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
6848 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6849 TREE_CHAIN (field
) = fields
;
6852 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6854 /* Zap out the name so that the back end will give us the debugging
6855 information for this anonymous RECORD_TYPE. */
6856 TYPE_NAME (t
) = NULL_TREE
;
6858 /* If this is not the unqualified form of this pointer-to-member
6859 type, set the TYPE_MAIN_VARIANT for this type to be the
6860 unqualified type. Since they are actually RECORD_TYPEs that are
6861 not variants of each other, we must do this manually. */
6862 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6864 t
= build_qualified_type (t
, cp_type_quals (type
));
6865 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6866 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6867 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6870 /* Cache this pointer-to-member type so that we can find it again
6872 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6874 /* Managing canonical types for the RECORD_TYPE behind a
6875 pointer-to-member function is a nightmare, so use structural
6876 equality for now. */
6877 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6882 /* Create and return a pointer to data member type. */
6885 build_ptrmem_type (tree class_type
, tree member_type
)
6887 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6891 arg_types
= TYPE_ARG_TYPES (member_type
);
6892 class_type
= (cp_build_qualified_type
6894 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6896 = build_method_type_directly (class_type
,
6897 TREE_TYPE (member_type
),
6898 TREE_CHAIN (arg_types
));
6899 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6903 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6904 return build_offset_type (class_type
, member_type
);
6908 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6909 Check to see that the definition is valid. Issue appropriate error
6910 messages. Return 1 if the definition is particularly bad, or 0
6914 check_static_variable_definition (tree decl
, tree type
)
6916 /* Motion 10 at San Diego: If a static const integral data member is
6917 initialized with an integral constant expression, the initializer
6918 may appear either in the declaration (within the class), or in
6919 the definition, but not both. If it appears in the class, the
6920 member is a member constant. The file-scope definition is always
6922 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6924 error ("invalid in-class initialization of static data member "
6925 "of non-integral type %qT",
6927 /* If we just return the declaration, crashes will sometimes
6928 occur. We therefore return void_type_node, as if this were a
6929 friend declaration, to cause callers to completely ignore
6930 this declaration. */
6933 else if (!CP_TYPE_CONST_P (type
))
6934 error ("ISO C++ forbids in-class initialization of non-const "
6935 "static member %qD",
6937 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6938 pedwarn ("ISO C++ forbids initialization of member constant "
6939 "%qD of non-integral type %qT", decl
, type
);
6944 /* Given the SIZE (i.e., number of elements) in an array, compute an
6945 appropriate index type for the array. If non-NULL, NAME is the
6946 name of the thing being declared. */
6949 compute_array_index_type (tree name
, tree size
)
6953 tree abi_1_itype
= NULL_TREE
;
6955 if (error_operand_p (size
))
6956 return error_mark_node
;
6958 type
= TREE_TYPE (size
);
6959 /* The array bound must be an integer type. */
6960 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6963 error ("size of array %qD has non-integral type %qT", name
, type
);
6965 error ("size of array has non-integral type %qT", type
);
6966 size
= integer_one_node
;
6967 type
= TREE_TYPE (size
);
6970 if (value_dependent_expression_p (size
))
6972 /* We cannot do any checking for a value-dependent SIZE. Just
6973 build the index type and mark that it requires structural
6975 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
6976 size
, integer_one_node
));
6977 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
6981 if (!abi_version_at_least (2) && processing_template_decl
)
6982 /* For abi-1, we handled all instances in templates the same way,
6983 even when they were non-dependent. This effects the manglings
6984 produced. So, we do the normal checking for non-dependent
6985 sizes, but at the end we'll return the same type that abi-1
6986 would have, but with TYPE_CANONICAL set to the "right"
6987 value that the current ABI would provide. */
6988 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
6989 size
, integer_one_node
));
6991 /* The size might be the result of a cast. */
6992 STRIP_TYPE_NOPS (size
);
6994 /* It might be a const variable or enumeration constant. */
6995 size
= integral_constant_value (size
);
6997 /* Normally, the array-bound will be a constant. */
6998 if (TREE_CODE (size
) == INTEGER_CST
)
7000 /* Check to see if the array bound overflowed. Make that an
7001 error, no matter how generous we're being. */
7002 int old_flag_pedantic_errors
= flag_pedantic_errors
;
7003 int old_pedantic
= pedantic
;
7004 pedantic
= flag_pedantic_errors
= 1;
7005 constant_expression_warning (size
);
7006 pedantic
= old_pedantic
;
7007 flag_pedantic_errors
= old_flag_pedantic_errors
;
7009 /* An array must have a positive number of elements. */
7010 if (INT_CST_LT (size
, integer_zero_node
))
7013 error ("size of array %qD is negative", name
);
7015 error ("size of array is negative");
7016 size
= integer_one_node
;
7018 /* As an extension we allow zero-sized arrays. We always allow
7019 them in system headers because glibc uses them. */
7020 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
7023 pedwarn ("ISO C++ forbids zero-size array %qD", name
);
7025 pedwarn ("ISO C++ forbids zero-size array");
7028 else if (TREE_CONSTANT (size
))
7030 /* `(int) &fn' is not a valid array bound. */
7032 error ("size of array %qD is not an integral constant-expression",
7035 error ("size of array is not an integral constant-expression");
7036 size
= integer_one_node
;
7038 else if (pedantic
&& warn_vla
!= 0)
7041 pedwarn ("ISO C++ forbids variable length array %qD", name
);
7043 pedwarn ("ISO C++ forbids variable length array");
7045 else if (warn_vla
> 0)
7049 "variable length array %qD is used", name
);
7052 "variable length array is used");
7055 if (processing_template_decl
&& !TREE_CONSTANT (size
))
7056 /* A variable sized array. */
7057 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
7060 HOST_WIDE_INT saved_processing_template_decl
;
7062 /* Compute the index of the largest element in the array. It is
7063 one less than the number of elements in the array. We save
7064 and restore PROCESSING_TEMPLATE_DECL so that computations in
7065 cp_build_binary_op will be appropriately folded. */
7066 saved_processing_template_decl
= processing_template_decl
;
7067 processing_template_decl
= 0;
7068 itype
= cp_build_binary_op (MINUS_EXPR
,
7069 cp_convert (ssizetype
, size
),
7070 cp_convert (ssizetype
, integer_one_node
));
7071 itype
= fold (itype
);
7072 processing_template_decl
= saved_processing_template_decl
;
7074 if (!TREE_CONSTANT (itype
))
7075 /* A variable sized array. */
7076 itype
= variable_size (itype
);
7077 /* Make sure that there was no overflow when creating to a signed
7078 index type. (For example, on a 32-bit machine, an array with
7079 size 2^32 - 1 is too big.) */
7080 else if (TREE_CODE (itype
) == INTEGER_CST
7081 && TREE_OVERFLOW (itype
))
7083 error ("overflow in array dimension");
7084 TREE_OVERFLOW (itype
) = 0;
7088 /* Create and return the appropriate index type. */
7091 tree t
= build_index_type (itype
);
7092 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
7096 return build_index_type (itype
);
7099 /* Returns the scope (if any) in which the entity declared by
7100 DECLARATOR will be located. If the entity was declared with an
7101 unqualified name, NULL_TREE is returned. */
7104 get_scope_of_declarator (const cp_declarator
*declarator
)
7106 while (declarator
&& declarator
->kind
!= cdk_id
)
7107 declarator
= declarator
->declarator
;
7109 /* If the declarator-id is a SCOPE_REF, the scope in which the
7110 declaration occurs is the first operand. */
7112 && declarator
->u
.id
.qualifying_scope
)
7113 return declarator
->u
.id
.qualifying_scope
;
7115 /* Otherwise, the declarator is not a qualified name; the entity will
7116 be declared in the current scope. */
7120 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7121 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7125 create_array_type_for_decl (tree name
, tree type
, tree size
)
7127 tree itype
= NULL_TREE
;
7128 const char* error_msg
;
7130 /* If things have already gone awry, bail now. */
7131 if (type
== error_mark_node
|| size
== error_mark_node
)
7132 return error_mark_node
;
7134 /* Assume that everything will go OK. */
7137 /* There are some types which cannot be array elements. */
7138 switch (TREE_CODE (type
))
7141 error_msg
= "array of void";
7145 error_msg
= "array of functions";
7148 case REFERENCE_TYPE
:
7149 error_msg
= "array of references";
7153 error_msg
= "array of function members";
7160 /* If something went wrong, issue an error-message and return. */
7164 error ("declaration of %qD as %s", name
, error_msg
);
7166 error ("creating %s", error_msg
);
7168 return error_mark_node
;
7173 The constant expressions that specify the bounds of the arrays
7174 can be omitted only for the first member of the sequence. */
7175 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
7178 error ("declaration of %qD as multidimensional array must "
7179 "have bounds for all dimensions except the first",
7182 error ("multidimensional array must have bounds for all "
7183 "dimensions except the first");
7185 return error_mark_node
;
7188 /* Figure out the index type for the array. */
7190 itype
= compute_array_index_type (name
, size
);
7193 T is called the array element type; this type shall not be [...] an
7194 abstract class type. */
7195 abstract_virtuals_error (name
, type
);
7197 return build_cplus_array_type (type
, itype
);
7200 /* Check that it's OK to declare a function with the indicated TYPE.
7201 SFK indicates the kind of special function (if any) that this
7202 function is. OPTYPE is the type given in a conversion operator
7203 declaration, or the class type for a constructor/destructor.
7204 Returns the actual return type of the function; that
7205 may be different than TYPE if an error occurs, or for certain
7206 special functions. */
7209 check_special_function_return_type (special_function_kind sfk
,
7215 case sfk_constructor
:
7217 error ("return type specification for constructor invalid");
7219 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7220 type
= build_pointer_type (optype
);
7222 type
= void_type_node
;
7225 case sfk_destructor
:
7227 error ("return type specification for destructor invalid");
7228 /* We can't use the proper return type here because we run into
7229 problems with ambiguous bases and covariant returns.
7230 Java classes are left unchanged because (void *) isn't a valid
7231 Java type, and we don't want to change the Java ABI. */
7232 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7233 type
= build_pointer_type (void_type_node
);
7235 type
= void_type_node
;
7238 case sfk_conversion
:
7240 error ("return type specified for %<operator %T%>", optype
);
7251 /* A variable or data member (whose unqualified name is IDENTIFIER)
7252 has been declared with the indicated TYPE. If the TYPE is not
7253 acceptable, issue an error message and return a type to use for
7254 error-recovery purposes. */
7257 check_var_type (tree identifier
, tree type
)
7259 if (VOID_TYPE_P (type
))
7262 error ("unnamed variable or field declared void");
7263 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
7265 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
7266 error ("variable or field %qE declared void", identifier
);
7269 error ("variable or field declared void");
7270 type
= error_mark_node
;
7276 /* Given declspecs and a declarator (abstract or otherwise), determine
7277 the name and type of the object declared and construct a DECL node
7280 DECLSPECS points to the representation of declaration-specifier
7281 sequence that precedes declarator.
7283 DECL_CONTEXT says which syntactic context this declaration is in:
7284 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7285 FUNCDEF for a function definition. Like NORMAL but a few different
7286 error messages in each case. Return value may be zero meaning
7287 this definition is too screwy to try to parse.
7288 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7289 handle member functions (which have FIELD context).
7290 Return value may be zero meaning this definition is too screwy to
7292 PARM for a parameter declaration (either within a function prototype
7293 or before a function body). Make a PARM_DECL, or return void_type_node.
7294 CATCHPARM for a parameter declaration before a catch clause.
7295 TYPENAME if for a typename (in a cast or sizeof).
7296 Don't make a DECL node; just return the ..._TYPE node.
7297 FIELD for a struct or union field; make a FIELD_DECL.
7298 BITFIELD for a field with specified width.
7299 INITIALIZED is 1 if the decl has an initializer.
7301 ATTRLIST is a pointer to the list of attributes, which may be NULL
7302 if there are none; *ATTRLIST may be modified if attributes from inside
7303 the declarator should be applied to the declaration.
7305 When this function is called, scoping variables (such as
7306 CURRENT_CLASS_TYPE) should reflect the scope in which the
7307 declaration occurs, not the scope in which the new declaration will
7308 be placed. For example, on:
7312 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7315 Returns a DECL (if a declarator is present), a TYPE (if there is no
7316 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7320 grokdeclarator (const cp_declarator
*declarator
,
7321 const cp_decl_specifier_seq
*declspecs
,
7322 enum decl_context decl_context
,
7326 tree type
= NULL_TREE
;
7328 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
7329 int explicit_int
= 0;
7330 int explicit_char
= 0;
7331 int defaulted_int
= 0;
7332 tree dependent_name
= NULL_TREE
;
7334 tree typedef_decl
= NULL_TREE
;
7335 const char *name
= NULL
;
7336 tree typedef_type
= NULL_TREE
;
7337 /* True if this declarator is a function definition. */
7338 bool funcdef_flag
= false;
7339 cp_declarator_kind innermost_code
= cdk_error
;
7342 /* See the code below that used this. */
7343 tree decl_attr
= NULL_TREE
;
7346 /* Keep track of what sort of function is being processed
7347 so that we can warn about default return values, or explicit
7348 return values which do not match prescribed defaults. */
7349 special_function_kind sfk
= sfk_none
;
7351 tree dname
= NULL_TREE
;
7352 tree ctor_return_type
= NULL_TREE
;
7353 enum overload_flags flags
= NO_SPECIAL
;
7354 /* cv-qualifiers that apply to the declarator, for a declaration of
7355 a member function. */
7356 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
7357 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7359 tree raises
= NULL_TREE
;
7360 int template_count
= 0;
7361 tree returned_attrs
= NULL_TREE
;
7362 tree parms
= NULL_TREE
;
7363 const cp_declarator
*id_declarator
;
7364 /* The unqualified name of the declarator; either an
7365 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7366 tree unqualified_id
;
7367 /* The class type, if any, in which this entity is located,
7368 or NULL_TREE if none. Note that this value may be different from
7369 the current class type; for example if an attempt is made to declare
7370 "A::f" inside "B", this value will be "A". */
7371 tree ctype
= current_class_type
;
7372 /* The NAMESPACE_DECL for the namespace in which this entity is
7373 located. If an unqualified name is used to declare the entity,
7374 this value will be NULL_TREE, even if the entity is located at
7376 tree in_namespace
= NULL_TREE
;
7377 cp_storage_class storage_class
;
7378 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
7379 bool type_was_error_mark_node
= false;
7380 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
7381 bool set_no_warning
= false;
7383 signed_p
= declspecs
->specs
[(int)ds_signed
];
7384 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
7385 short_p
= declspecs
->specs
[(int)ds_short
];
7386 long_p
= declspecs
->specs
[(int)ds_long
];
7387 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
7388 thread_p
= declspecs
->specs
[(int)ds_thread
];
7390 if (decl_context
== FUNCDEF
)
7391 funcdef_flag
= true, decl_context
= NORMAL
;
7392 else if (decl_context
== MEMFUNCDEF
)
7393 funcdef_flag
= true, decl_context
= FIELD
;
7394 else if (decl_context
== BITFIELD
)
7395 bitfield
= 1, decl_context
= FIELD
;
7397 /* Look inside a declarator for the name being declared
7398 and get it as a string, for an error message. */
7399 for (id_declarator
= declarator
;
7401 id_declarator
= id_declarator
->declarator
)
7403 if (id_declarator
->kind
!= cdk_id
)
7404 innermost_code
= id_declarator
->kind
;
7406 switch (id_declarator
->kind
)
7409 if (id_declarator
->declarator
7410 && id_declarator
->declarator
->kind
== cdk_id
)
7412 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
7413 if (sfk
== sfk_destructor
)
7420 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
7421 tree decl
= id_declarator
->u
.id
.unqualified_name
;
7424 if (qualifying_scope
)
7426 if (at_function_scope_p ())
7430 A declarator-id shall not be qualified except
7433 None of the cases are permitted in block
7435 if (qualifying_scope
== global_namespace
)
7436 error ("invalid use of qualified-name %<::%D%>",
7438 else if (TYPE_P (qualifying_scope
))
7439 error ("invalid use of qualified-name %<%T::%D%>",
7440 qualifying_scope
, decl
);
7442 error ("invalid use of qualified-name %<%D::%D%>",
7443 qualifying_scope
, decl
);
7444 return error_mark_node
;
7446 else if (TYPE_P (qualifying_scope
))
7448 ctype
= qualifying_scope
;
7449 if (innermost_code
!= cdk_function
7450 && current_class_type
7451 && !UNIQUELY_DERIVED_FROM_P (ctype
,
7452 current_class_type
))
7454 error ("type %qT is not derived from type %qT",
7455 ctype
, current_class_type
);
7456 return error_mark_node
;
7459 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
7460 in_namespace
= qualifying_scope
;
7462 switch (TREE_CODE (decl
))
7468 if (innermost_code
!= cdk_function
)
7470 error ("declaration of %qD as non-function", decl
);
7471 return error_mark_node
;
7473 else if (!qualifying_scope
7474 && !(current_class_type
&& at_class_scope_p ()))
7476 error ("declaration of %qD as non-member", decl
);
7477 return error_mark_node
;
7480 type
= TREE_OPERAND (decl
, 0);
7481 name
= IDENTIFIER_POINTER (constructor_name (type
));
7486 case TEMPLATE_ID_EXPR
:
7488 tree fns
= TREE_OPERAND (decl
, 0);
7491 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
7493 gcc_assert (is_overloaded_fn (dname
));
7494 dname
= DECL_NAME (get_first_fn (dname
));
7499 case IDENTIFIER_NODE
:
7500 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
7503 if (C_IS_RESERVED_WORD (dname
))
7505 error ("declarator-id missing; using reserved word %qD",
7507 name
= IDENTIFIER_POINTER (dname
);
7509 else if (!IDENTIFIER_TYPENAME_P (dname
))
7510 name
= IDENTIFIER_POINTER (dname
);
7513 gcc_assert (flags
== NO_SPECIAL
);
7514 flags
= TYPENAME_FLAG
;
7515 ctor_return_type
= TREE_TYPE (dname
);
7516 sfk
= sfk_conversion
;
7517 if (is_typename_at_global_scope (dname
))
7518 name
= IDENTIFIER_POINTER (dname
);
7520 name
= "<invalid operator>";
7537 return error_mark_node
;
7542 if (id_declarator
->kind
== cdk_id
)
7548 The declarator in a function-definition shall have the form
7549 D1 ( parameter-declaration-clause) ... */
7550 if (funcdef_flag
&& innermost_code
!= cdk_function
)
7552 error ("function definition does not declare parameters");
7553 return error_mark_node
;
7556 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
7557 && innermost_code
!= cdk_function
7558 && ! (ctype
&& !declspecs
->any_specifiers_p
))
7560 error ("declaration of %qD as non-function", dname
);
7561 return error_mark_node
;
7564 /* Anything declared one level down from the top level
7565 must be one of the parameters of a function
7566 (because the body is at least two levels down). */
7568 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7569 by not allowing C++ class definitions to specify their parameters
7570 with xdecls (must be spec.d in the parmlist).
7572 Since we now wait to push a class scope until we are sure that
7573 we are in a legitimate method context, we must set oldcname
7574 explicitly (since current_class_name is not yet alive).
7576 We also want to avoid calling this a PARM if it is in a namespace. */
7578 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
7580 struct cp_binding_level
*b
= current_binding_level
;
7581 current_binding_level
= b
->level_chain
;
7582 if (current_binding_level
!= 0 && toplevel_bindings_p ())
7583 decl_context
= PARM
;
7584 current_binding_level
= b
;
7588 name
= decl_context
== PARM
? "parameter" : "type name";
7590 /* If there were multiple types specified in the decl-specifier-seq,
7591 issue an error message. */
7592 if (declspecs
->multiple_types_p
)
7594 error ("two or more data types in declaration of %qs", name
);
7595 return error_mark_node
;
7598 if (declspecs
->conflicting_specifiers_p
)
7600 error ("conflicting specifiers in declaration of %qs", name
);
7601 return error_mark_node
;
7604 /* Extract the basic type from the decl-specifier-seq. */
7605 type
= declspecs
->type
;
7606 if (type
== error_mark_node
)
7609 type_was_error_mark_node
= true;
7611 /* If the entire declaration is itself tagged as deprecated then
7612 suppress reports of deprecated items. */
7613 if (type
&& TREE_DEPRECATED (type
)
7614 && deprecated_state
!= DEPRECATED_SUPPRESS
)
7615 warn_deprecated_use (type
);
7616 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
7618 typedef_decl
= type
;
7619 type
= TREE_TYPE (typedef_decl
);
7620 if (TREE_DEPRECATED (type
)
7621 && DECL_ARTIFICIAL (typedef_decl
)
7622 && deprecated_state
!= DEPRECATED_SUPPRESS
)
7623 warn_deprecated_use (type
);
7625 /* No type at all: default to `int', and set DEFAULTED_INT
7626 because it was not a user-defined typedef. */
7627 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
7629 /* These imply 'int'. */
7630 type
= integer_type_node
;
7634 explicit_int
= declspecs
->explicit_int_p
;
7635 explicit_char
= declspecs
->explicit_char_p
;
7638 /* See the code below that used this. */
7640 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
7642 typedef_type
= type
;
7645 if (sfk
!= sfk_conversion
)
7646 ctor_return_type
= ctype
;
7648 if (sfk
!= sfk_none
)
7649 type
= check_special_function_return_type (sfk
, type
,
7651 else if (type
== NULL_TREE
)
7657 /* We handle `main' specially here, because 'main () { }' is so
7658 common. With no options, it is allowed. With -Wreturn-type,
7659 it is a warning. It is only an error with -pedantic-errors. */
7660 is_main
= (funcdef_flag
7661 && dname
&& MAIN_NAME_P (dname
)
7662 && ctype
== NULL_TREE
7663 && in_namespace
== NULL_TREE
7664 && current_namespace
== global_namespace
);
7666 if (type_was_error_mark_node
)
7667 /* We've already issued an error, don't complain more. */;
7668 else if (in_system_header
|| flag_ms_extensions
)
7669 /* Allow it, sigh. */;
7670 else if (pedantic
|| ! is_main
)
7671 pedwarn ("ISO C++ forbids declaration of %qs with no type", name
);
7673 warning (OPT_Wreturn_type
,
7674 "ISO C++ forbids declaration of %qs with no type", name
);
7676 type
= integer_type_node
;
7681 /* Now process the modifiers that were specified
7682 and check for invalid combinations. */
7684 /* Long double is a special combination. */
7685 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
7688 type
= build_qualified_type (long_double_type_node
,
7689 cp_type_quals (type
));
7692 /* Check all other uses of type modifiers. */
7694 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
7698 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
7699 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
7700 else if (signed_p
&& unsigned_p
)
7701 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
7702 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
7703 error ("%<long long%> invalid for %qs", name
);
7704 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
7705 error ("%<long%> invalid for %qs", name
);
7706 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
7707 error ("%<short%> invalid for %qs", name
);
7708 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
7709 error ("%<long%> or %<short%> invalid for %qs", name
);
7710 else if ((long_p
|| short_p
) && explicit_char
)
7711 error ("%<long%> or %<short%> specified with char for %qs", name
);
7712 else if (long_p
&& short_p
)
7713 error ("%<long%> and %<short%> specified together for %qs", name
);
7717 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
7719 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7721 if (flag_pedantic_errors
)
7726 /* Discard the type modifiers if they are invalid. */
7737 /* Decide whether an integer type is signed or not.
7738 Optionally treat bitfields as signed by default. */
7742 It is implementation-defined whether a plain (neither
7743 explicitly signed or unsigned) char, short, int, or long
7744 bit-field is signed or unsigned.
7746 Naturally, we extend this to long long as well. Note that
7747 this does not include wchar_t. */
7748 || (bitfield
&& !flag_signed_bitfields
7750 /* A typedef for plain `int' without `signed' can be
7751 controlled just like plain `int', but a typedef for
7752 `signed int' cannot be so controlled. */
7754 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
7755 && TREE_CODE (type
) == INTEGER_TYPE
7756 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
7759 type
= long_long_unsigned_type_node
;
7761 type
= long_unsigned_type_node
;
7763 type
= short_unsigned_type_node
;
7764 else if (type
== char_type_node
)
7765 type
= unsigned_char_type_node
;
7766 else if (typedef_decl
)
7767 type
= unsigned_type_for (type
);
7769 type
= unsigned_type_node
;
7771 else if (signed_p
&& type
== char_type_node
)
7772 type
= signed_char_type_node
;
7774 type
= long_long_integer_type_node
;
7776 type
= long_integer_type_node
;
7778 type
= short_integer_type_node
;
7780 if (declspecs
->specs
[(int)ds_complex
])
7782 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
7783 error ("complex invalid for %qs", name
);
7784 /* If we just have "complex", it is equivalent to
7785 "complex double", but if any modifiers at all are specified it is
7786 the complex form of TYPE. E.g, "complex short" is
7787 "complex short int". */
7789 else if (defaulted_int
&& ! longlong
7790 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
7791 type
= complex_double_type_node
;
7792 else if (type
== integer_type_node
)
7793 type
= complex_integer_type_node
;
7794 else if (type
== float_type_node
)
7795 type
= complex_float_type_node
;
7796 else if (type
== double_type_node
)
7797 type
= complex_double_type_node
;
7798 else if (type
== long_double_type_node
)
7799 type
= complex_long_double_type_node
;
7801 type
= build_complex_type (type
);
7804 type_quals
= TYPE_UNQUALIFIED
;
7805 if (declspecs
->specs
[(int)ds_const
])
7806 type_quals
|= TYPE_QUAL_CONST
;
7807 if (declspecs
->specs
[(int)ds_volatile
])
7808 type_quals
|= TYPE_QUAL_VOLATILE
;
7809 if (declspecs
->specs
[(int)ds_restrict
])
7810 type_quals
|= TYPE_QUAL_RESTRICT
;
7811 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
7812 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7815 if (TREE_CODE (type
) == FUNCTION_TYPE
7816 && type_quals
!= TYPE_UNQUALIFIED
)
7818 /* This was an error in C++98 (cv-qualifiers cannot be added to
7819 a function type), but DR 295 makes the code well-formed by
7820 dropping the extra qualifiers. */
7823 tree bad_type
= build_qualified_type (type
, type_quals
);
7824 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7827 type_quals
= TYPE_UNQUALIFIED
;
7829 type_quals
|= cp_type_quals (type
);
7830 type
= cp_build_qualified_type_real
7831 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
7832 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
7833 /* We might have ignored or rejected some of the qualifiers. */
7834 type_quals
= cp_type_quals (type
);
7837 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
7838 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
7839 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
7841 storage_class
= declspecs
->storage_class
;
7842 if (storage_class
== sc_static
)
7843 staticp
= 1 + (decl_context
== FIELD
);
7845 if (virtualp
&& staticp
== 2)
7847 error ("member %qD cannot be declared both virtual and static", dname
);
7848 storage_class
= sc_none
;
7851 friendp
= !! declspecs
->specs
[(int)ds_friend
];
7853 if (dependent_name
&& !friendp
)
7855 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
7856 return error_mark_node
;
7859 /* Issue errors about use of storage classes for parameters. */
7860 if (decl_context
== PARM
)
7862 if (declspecs
->specs
[(int)ds_typedef
])
7864 error ("typedef declaration invalid in parameter declaration");
7865 return error_mark_node
;
7867 else if (storage_class
== sc_static
7868 || storage_class
== sc_extern
7870 error ("storage class specifiers invalid in parameter declarations");
7873 /* Give error if `virtual' is used outside of class declaration. */
7875 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
7877 error ("virtual outside class declaration");
7881 /* Static anonymous unions are dealt with here. */
7882 if (staticp
&& decl_context
== TYPENAME
7884 && ANON_AGGR_TYPE_P (declspecs
->type
))
7885 decl_context
= FIELD
;
7887 /* Warn about storage classes that are invalid for certain
7888 kinds of declarations (parameters, typenames, etc.). */
7891 && storage_class
!= sc_extern
7892 && storage_class
!= sc_static
)
7893 || declspecs
->specs
[(int)ds_typedef
]))
7895 error ("multiple storage classes in declaration of %qs", name
);
7898 if (decl_context
!= NORMAL
7899 && ((storage_class
!= sc_none
7900 && storage_class
!= sc_mutable
)
7903 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
7904 && (storage_class
== sc_register
7905 || storage_class
== sc_auto
))
7907 else if (declspecs
->specs
[(int)ds_typedef
])
7909 else if (decl_context
== FIELD
7910 /* C++ allows static class elements. */
7911 && storage_class
== sc_static
)
7912 /* C++ also allows inlines and signed and unsigned elements,
7913 but in those cases we don't come in here. */
7917 if (decl_context
== FIELD
)
7918 error ("storage class specified for %qs", name
);
7921 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7922 error ("storage class specified for parameter %qs", name
);
7924 error ("storage class specified for typename");
7926 if (storage_class
== sc_register
7927 || storage_class
== sc_auto
7928 || storage_class
== sc_extern
7930 storage_class
= sc_none
;
7933 else if (storage_class
== sc_extern
&& initialized
7936 if (toplevel_bindings_p ())
7938 /* It's common practice (and completely valid) to have a const
7939 be initialized and declared extern. */
7940 if (!(type_quals
& TYPE_QUAL_CONST
))
7941 warning (0, "%qs initialized and declared %<extern%>", name
);
7944 error ("%qs has both %<extern%> and initializer", name
);
7946 else if (storage_class
== sc_extern
&& funcdef_flag
7947 && ! toplevel_bindings_p ())
7948 error ("nested function %qs declared %<extern%>", name
);
7949 else if (toplevel_bindings_p ())
7951 if (storage_class
== sc_auto
)
7952 error ("top-level declaration of %qs specifies %<auto%>", name
);
7955 && storage_class
!= sc_extern
7956 && storage_class
!= sc_static
)
7958 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7963 if (storage_class
&& friendp
)
7964 error ("storage class specifiers invalid in friend function declarations");
7967 unqualified_id
= NULL_TREE
;
7970 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
7971 switch (TREE_CODE (unqualified_id
))
7975 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7978 case IDENTIFIER_NODE
:
7979 case TEMPLATE_ID_EXPR
:
7987 /* Determine the type of the entity declared by recurring on the
7989 for (; declarator
; declarator
= declarator
->declarator
)
7991 const cp_declarator
*inner_declarator
;
7994 if (type
== error_mark_node
)
7995 return error_mark_node
;
7997 attrs
= declarator
->attributes
;
8003 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
8004 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
8005 if (declarator
->kind
== cdk_function
)
8006 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
8007 if (declarator
->kind
== cdk_array
)
8008 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
8009 returned_attrs
= decl_attributes (&type
,
8010 chainon (returned_attrs
, attrs
),
8014 if (declarator
->kind
== cdk_id
)
8017 inner_declarator
= declarator
->declarator
;
8019 switch (declarator
->kind
)
8022 type
= create_array_type_for_decl (dname
, type
,
8023 declarator
->u
.array
.bounds
);
8031 /* Declaring a function type.
8032 Make sure we have a valid type for the function to return. */
8034 if (type_quals
!= TYPE_UNQUALIFIED
)
8036 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
8037 warning (OPT_Wignored_qualifiers
,
8038 "type qualifiers ignored on function return type");
8039 /* We now know that the TYPE_QUALS don't apply to the
8040 decl, but to its return type. */
8041 type_quals
= TYPE_UNQUALIFIED
;
8042 set_no_warning
= true;
8045 /* Warn about some types functions can't return. */
8047 if (TREE_CODE (type
) == FUNCTION_TYPE
)
8049 error ("%qs declared as function returning a function", name
);
8050 type
= integer_type_node
;
8052 if (TREE_CODE (type
) == ARRAY_TYPE
)
8054 error ("%qs declared as function returning an array", name
);
8055 type
= integer_type_node
;
8058 /* Pick up type qualifiers which should be applied to `this'. */
8059 memfn_quals
= declarator
->u
.function
.qualifiers
;
8061 /* Pick up the exception specifications. */
8062 raises
= declarator
->u
.function
.exception_specification
;
8064 /* Say it's a definition only for the CALL_EXPR
8065 closest to the identifier. */
8066 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
8068 if (ctype
== NULL_TREE
8069 && decl_context
== FIELD
8071 && (friendp
== 0 || dname
== current_class_name
))
8072 ctype
= current_class_type
;
8074 if (ctype
&& (sfk
== sfk_constructor
8075 || sfk
== sfk_destructor
))
8077 /* We are within a class's scope. If our declarator name
8078 is the same as the class name, and we are defining
8079 a function, then it is a constructor/destructor, and
8080 therefore returns a void type. */
8082 /* ISO C++ 12.4/2. A destructor may not be declared
8083 const or volatile. A destructor may not be
8086 ISO C++ 12.1. A constructor may not be declared
8087 const or volatile. A constructor may not be
8088 virtual. A constructor may not be static. */
8090 error ((flags
== DTOR_FLAG
)
8091 ? "destructor cannot be static member function"
8092 : "constructor cannot be static member function");
8095 error ((flags
== DTOR_FLAG
)
8096 ? "destructors may not be cv-qualified"
8097 : "constructors may not be cv-qualified");
8098 memfn_quals
= TYPE_UNQUALIFIED
;
8101 if (decl_context
== FIELD
8102 && !member_function_or_else (ctype
,
8105 return error_mark_node
;
8107 if (flags
!= DTOR_FLAG
)
8109 /* It's a constructor. */
8114 pedwarn ("constructors cannot be declared virtual");
8117 if (decl_context
== FIELD
8118 && sfk
!= sfk_constructor
)
8119 return error_mark_node
;
8121 if (decl_context
== FIELD
)
8127 error ("can't initialize friend function %qs", name
);
8130 /* Cannot be both friend and virtual. */
8131 error ("virtual functions cannot be friends");
8134 if (decl_context
== NORMAL
)
8135 error ("friend declaration not in class definition");
8136 if (current_function_decl
&& funcdef_flag
)
8137 error ("can't define friend function %qs in a local "
8142 arg_types
= grokparms (declarator
->u
.function
.parameters
,
8145 if (inner_declarator
8146 && inner_declarator
->kind
== cdk_id
8147 && inner_declarator
->u
.id
.sfk
== sfk_destructor
8148 && arg_types
!= void_list_node
)
8150 error ("destructors may not have parameters");
8151 arg_types
= void_list_node
;
8155 type
= build_function_type (type
, arg_types
);
8162 /* Filter out pointers-to-references and references-to-references.
8163 We can get these if a TYPE_DECL is used. */
8165 if (TREE_CODE (type
) == REFERENCE_TYPE
)
8167 if (declarator
->kind
!= cdk_reference
)
8169 error ("cannot declare pointer to %q#T", type
);
8170 type
= TREE_TYPE (type
);
8173 /* In C++0x, we allow reference to reference declarations
8174 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8175 and template type arguments [14.3.1/4 temp.arg.type]. The
8176 check for direct reference to reference declarations, which
8177 are still forbidden, occurs below. Reasoning behind the change
8178 can be found in DR106, DR540, and the rvalue reference
8180 else if (cxx_dialect
== cxx98
)
8182 error ("cannot declare reference to %q#T", type
);
8183 type
= TREE_TYPE (type
);
8186 else if (VOID_TYPE_P (type
))
8188 if (declarator
->kind
== cdk_reference
)
8189 error ("cannot declare reference to %q#T", type
);
8190 else if (declarator
->kind
== cdk_ptrmem
)
8191 error ("cannot declare pointer to %q#T member", type
);
8194 /* We now know that the TYPE_QUALS don't apply to the decl,
8195 but to the target of the pointer. */
8196 type_quals
= TYPE_UNQUALIFIED
;
8198 if (declarator
->kind
== cdk_ptrmem
8199 && (TREE_CODE (type
) == FUNCTION_TYPE
8200 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
8202 memfn_quals
|= cp_type_quals (type
);
8203 type
= build_memfn_type (type
,
8204 declarator
->u
.pointer
.class_type
,
8206 memfn_quals
= TYPE_UNQUALIFIED
;
8209 if (declarator
->kind
== cdk_reference
)
8211 /* In C++0x, the type we are creating a reference to might be
8212 a typedef which is itself a reference type. In that case,
8213 we follow the reference collapsing rules in
8214 [7.1.3/8 dcl.typedef] to create the final reference type:
8216 "If a typedef TD names a type that is a reference to a type
8217 T, an attempt to create the type 'lvalue reference to cv TD'
8218 creates the type 'lvalue reference to T,' while an attempt
8219 to create the type "rvalue reference to cv TD' creates the
8222 if (!VOID_TYPE_P (type
))
8223 type
= cp_build_reference_type
8224 ((TREE_CODE (type
) == REFERENCE_TYPE
8225 ? TREE_TYPE (type
) : type
),
8226 (declarator
->u
.reference
.rvalue_ref
8227 && (TREE_CODE(type
) != REFERENCE_TYPE
8228 || TYPE_REF_IS_RVALUE (type
))));
8230 /* In C++0x, we need this check for direct reference to
8231 reference declarations, which are forbidden by
8232 [8.3.2/5 dcl.ref]. Reference to reference declarations
8233 are only allowed indirectly through typedefs and template
8234 type arguments. Example:
8236 void foo(int & &); // invalid ref-to-ref decl
8238 typedef int & int_ref;
8239 void foo(int_ref &); // valid ref-to-ref decl
8241 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
8242 error ("cannot declare reference to %q#T, which is not "
8243 "a typedef or a template type argument", type
);
8245 else if (TREE_CODE (type
) == METHOD_TYPE
)
8246 type
= build_ptrmemfunc_type (build_pointer_type (type
));
8247 else if (declarator
->kind
== cdk_ptrmem
)
8249 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
8251 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
8252 /* We will already have complained. */
8253 type
= error_mark_node
;
8255 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
8259 type
= build_pointer_type (type
);
8261 /* Process a list of type modifier keywords (such as
8262 const or volatile) that were given inside the `*' or `&'. */
8264 if (declarator
->u
.pointer
.qualifiers
)
8267 = cp_build_qualified_type (type
,
8268 declarator
->u
.pointer
.qualifiers
);
8269 type_quals
= cp_type_quals (type
);
8282 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
8283 && TREE_CODE (type
) != FUNCTION_TYPE
8284 && TREE_CODE (type
) != METHOD_TYPE
)
8286 error ("template-id %qD used as a declarator",
8288 unqualified_id
= dname
;
8291 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8292 qualified with a class-name, turn it into a METHOD_TYPE, unless
8293 we know that the function is static. We take advantage of this
8294 opportunity to do other processing that pertains to entities
8295 explicitly declared to be class members. Note that if DECLARATOR
8296 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8297 would not have exited the loop above. */
8299 && declarator
->u
.id
.qualifying_scope
8300 && TYPE_P (declarator
->u
.id
.qualifying_scope
))
8304 ctype
= declarator
->u
.id
.qualifying_scope
;
8305 ctype
= TYPE_MAIN_VARIANT (ctype
);
8307 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
8309 /* You're supposed to have one `template <...>' for every
8310 template class, but you don't need one for a full
8311 specialization. For example:
8313 template <class T> struct S{};
8314 template <> struct S<int> { void f(); };
8315 void S<int>::f () {}
8317 is correct; there shouldn't be a `template <>' for the
8318 definition of `S<int>::f'. */
8319 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
8320 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
8321 /* T is an explicit (not partial) specialization. All
8322 containing classes must therefore also be explicitly
8325 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
8326 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
8327 template_count
+= 1;
8329 t
= TYPE_MAIN_DECL (t
);
8330 t
= DECL_CONTEXT (t
);
8333 if (ctype
== current_class_type
)
8337 pedwarn ("member functions are implicitly friends of their class");
8341 pedwarn ("extra qualification %<%T::%> on member %qs",
8344 else if (/* If the qualifying type is already complete, then we
8345 can skip the following checks. */
8346 !COMPLETE_TYPE_P (ctype
)
8347 && (/* If the function is being defined, then
8348 qualifying type must certainly be complete. */
8350 /* A friend declaration of "T::f" is OK, even if
8351 "T" is a template parameter. But, if this
8352 function is not a friend, the qualifying type
8354 || (!friendp
&& !CLASS_TYPE_P (ctype
))
8355 /* For a declaration, the type need not be
8356 complete, if either it is dependent (since there
8357 is no meaningful definition of complete in that
8358 case) or the qualifying class is currently being
8360 || !(dependent_type_p (ctype
)
8361 || currently_open_class (ctype
)))
8362 /* Check that the qualifying type is complete. */
8363 && !complete_type_or_else (ctype
, NULL_TREE
))
8364 return error_mark_node
;
8365 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8367 tree sname
= declarator
->u
.id
.unqualified_name
;
8369 if (current_class_type
8370 && (!friendp
|| funcdef_flag
))
8373 ? "cannot define member function %<%T::%s%> within %<%T%>"
8374 : "cannot declare member function %<%T::%s%> within %<%T%>",
8375 ctype
, name
, current_class_type
);
8376 return error_mark_node
;
8379 if (TREE_CODE (sname
) == IDENTIFIER_NODE
8380 && NEW_DELETE_OPNAME_P (sname
))
8381 /* Overloaded operator new and operator delete
8382 are always static functions. */
8385 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8387 else if (declspecs
->specs
[(int)ds_typedef
]
8388 && current_class_type
)
8390 error ("cannot declare member %<%T::%s%> within %qT",
8391 ctype
, name
, current_class_type
);
8392 return error_mark_node
;
8396 /* Now TYPE has the actual type. */
8401 *attrlist
= chainon (returned_attrs
, *attrlist
);
8403 attrlist
= &returned_attrs
;
8406 /* Handle parameter packs. */
8407 if (parameter_pack_p
)
8409 if (decl_context
== PARM
)
8410 /* Turn the type into a pack expansion.*/
8411 type
= make_pack_expansion (type
);
8413 error ("non-parameter %qs cannot be a parameter pack", name
);
8416 /* Did array size calculations overflow? */
8418 if (TREE_CODE (type
) == ARRAY_TYPE
8419 && COMPLETE_TYPE_P (type
)
8420 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
8421 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
8423 error ("size of array %qs is too large", name
);
8424 /* If we proceed with the array type as it is, we'll eventually
8425 crash in tree_low_cst(). */
8426 type
= error_mark_node
;
8429 if ((decl_context
== FIELD
|| decl_context
== PARM
)
8430 && !processing_template_decl
8431 && variably_modified_type_p (type
, NULL_TREE
))
8433 if (decl_context
== FIELD
)
8434 error ("data member may not have variably modified type %qT", type
);
8436 error ("parameter may not have variably modified type %qT", type
);
8437 type
= error_mark_node
;
8440 if (explicitp
== 1 || (explicitp
&& friendp
))
8442 /* [dcl.fct.spec] The explicit specifier shall only be used in
8443 declarations of constructors within a class definition. */
8444 error ("only declarations of constructors can be %<explicit%>");
8448 if (storage_class
== sc_mutable
)
8450 if (decl_context
!= FIELD
|| friendp
)
8452 error ("non-member %qs cannot be declared %<mutable%>", name
);
8453 storage_class
= sc_none
;
8455 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
8457 error ("non-object member %qs cannot be declared %<mutable%>", name
);
8458 storage_class
= sc_none
;
8460 else if (TREE_CODE (type
) == FUNCTION_TYPE
8461 || TREE_CODE (type
) == METHOD_TYPE
)
8463 error ("function %qs cannot be declared %<mutable%>", name
);
8464 storage_class
= sc_none
;
8468 error ("static %qs cannot be declared %<mutable%>", name
);
8469 storage_class
= sc_none
;
8471 else if (type_quals
& TYPE_QUAL_CONST
)
8473 error ("const %qs cannot be declared %<mutable%>", name
);
8474 storage_class
= sc_none
;
8478 /* If this is declaring a typedef name, return a TYPE_DECL. */
8479 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
8483 /* Note that the grammar rejects storage classes
8484 in typenames, fields or parameters. */
8485 if (current_lang_name
== lang_name_java
)
8486 TYPE_FOR_JAVA (type
) = 1;
8488 /* This declaration:
8490 typedef void f(int) const;
8492 declares a function type which is not a member of any
8493 particular class, but which is cv-qualified; for
8494 example "f S::*" declares a pointer to a const-qualified
8495 member function of S. We record the cv-qualification in the
8497 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8499 type
= cp_build_qualified_type (type
, memfn_quals
);
8501 /* We have now dealt with these qualifiers. */
8502 memfn_quals
= TYPE_UNQUALIFIED
;
8505 if (decl_context
== FIELD
)
8506 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
8508 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
8509 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
)
8510 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
8512 if (decl_context
!= FIELD
)
8514 if (!current_function_decl
)
8515 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
8516 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
8517 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8518 (current_function_decl
)))
8519 /* The TYPE_DECL is "abstract" because there will be
8520 clones of this constructor/destructor, and there will
8521 be copies of this TYPE_DECL generated in those
8523 DECL_ABSTRACT (decl
) = 1;
8525 else if (constructor_name_p (unqualified_id
, current_class_type
))
8526 pedwarn ("ISO C++ forbids nested type %qD with same name "
8527 "as enclosing class",
8530 /* If the user declares "typedef struct {...} foo" then the
8531 struct will have an anonymous name. Fill that name in now.
8532 Nothing can refer to it, so nothing needs know about the name
8534 if (type
!= error_mark_node
8537 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8538 && TYPE_ANONYMOUS_P (type
)
8539 /* Don't do this if there are attributes. */
8540 && (!attrlist
|| !*attrlist
)
8541 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
8543 tree oldname
= TYPE_NAME (type
);
8546 /* Replace the anonymous name with the real name everywhere. */
8547 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
8548 if (TYPE_NAME (t
) == oldname
)
8549 TYPE_NAME (t
) = decl
;
8551 if (TYPE_LANG_SPECIFIC (type
))
8552 TYPE_WAS_ANONYMOUS (type
) = 1;
8554 /* If this is a typedef within a template class, the nested
8555 type is a (non-primary) template. The name for the
8556 template needs updating as well. */
8557 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
8558 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
8559 = TYPE_IDENTIFIER (type
);
8561 /* FIXME remangle member functions; member functions of a
8562 type with external linkage have external linkage. */
8566 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
8567 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
8569 bad_specifiers (decl
, "type", virtualp
,
8570 memfn_quals
!= TYPE_UNQUALIFIED
,
8571 inlinep
, friendp
, raises
!= NULL_TREE
);
8576 /* Detect the case of an array type of unspecified size
8577 which came, as such, direct from a typedef name.
8578 We must copy the type, so that the array's domain can be
8579 individually set by the object's initializer. */
8581 if (type
&& typedef_type
8582 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
8583 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
8584 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
8586 /* Detect where we're using a typedef of function type to declare a
8587 function. PARMS will not be set, so we must create it now. */
8589 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8591 tree decls
= NULL_TREE
;
8594 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
8596 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
8598 TREE_CHAIN (decl
) = decls
;
8602 parms
= nreverse (decls
);
8604 if (decl_context
!= TYPENAME
)
8606 /* A cv-qualifier-seq shall only be part of the function type
8607 for a non-static member function. [8.3.5/4 dcl.fct] */
8608 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
8609 && (current_class_type
== NULL_TREE
|| staticp
) )
8612 ? G_("qualified function types cannot be used to "
8613 "declare static member functions")
8614 : G_("qualified function types cannot be used to "
8615 "declare free functions"));
8616 type
= TYPE_MAIN_VARIANT (type
);
8619 /* The qualifiers on the function type become the qualifiers on
8620 the non-static member function. */
8621 memfn_quals
|= cp_type_quals (type
);
8625 /* If this is a type name (such as, in a cast or sizeof),
8626 compute the type and return it now. */
8628 if (decl_context
== TYPENAME
)
8630 /* Note that the grammar rejects storage classes
8631 in typenames, fields or parameters. */
8632 if (type_quals
!= TYPE_UNQUALIFIED
)
8633 type_quals
= TYPE_UNQUALIFIED
;
8635 /* Special case: "friend class foo" looks like a TYPENAME context. */
8638 if (type_quals
!= TYPE_UNQUALIFIED
)
8640 error ("type qualifiers specified for friend class declaration");
8641 type_quals
= TYPE_UNQUALIFIED
;
8645 error ("%<inline%> specified for friend class declaration");
8651 /* Don't allow friend declaration without a class-key. */
8652 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
8653 pedwarn ("template parameters cannot be friends");
8654 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
8655 pedwarn ("friend declaration requires class-key, "
8656 "i.e. %<friend class %T::%D%>",
8657 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
8659 pedwarn ("friend declaration requires class-key, "
8660 "i.e. %<friend %#T%>",
8664 /* Only try to do this stuff if we didn't already give up. */
8665 if (type
!= integer_type_node
)
8667 /* A friendly class? */
8668 if (current_class_type
)
8669 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
8672 error ("trying to make class %qT a friend of global scope",
8675 type
= void_type_node
;
8678 else if (memfn_quals
)
8680 if (ctype
== NULL_TREE
)
8682 if (TREE_CODE (type
) != METHOD_TYPE
)
8683 error ("invalid qualifiers on non-member function type");
8685 ctype
= TYPE_METHOD_BASETYPE (type
);
8688 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8693 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
8694 && decl_context
!= CATCHPARM
8695 && TREE_CODE (type
) != UNION_TYPE
8698 error ("abstract declarator %qT used as declaration", type
);
8699 return error_mark_node
;
8702 /* Only functions may be declared using an operator-function-id. */
8704 && IDENTIFIER_OPNAME_P (unqualified_id
)
8705 && TREE_CODE (type
) != FUNCTION_TYPE
8706 && TREE_CODE (type
) != METHOD_TYPE
)
8708 error ("declaration of %qD as non-function", unqualified_id
);
8709 return error_mark_node
;
8712 /* We don't check parameter types here because we can emit a better
8713 error message later. */
8714 if (decl_context
!= PARM
)
8716 type
= check_var_type (unqualified_id
, type
);
8717 if (type
== error_mark_node
)
8718 return error_mark_node
;
8721 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8722 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8724 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8726 if (ctype
|| in_namespace
)
8727 error ("cannot use %<::%> in parameter declaration");
8729 /* A parameter declared as an array of T is really a pointer to T.
8730 One declared as a function is really a pointer to a function.
8731 One declared as a member is really a pointer to member. */
8733 if (TREE_CODE (type
) == ARRAY_TYPE
)
8735 /* Transfer const-ness of array into that of type pointed to. */
8736 type
= build_pointer_type (TREE_TYPE (type
));
8737 type_quals
= TYPE_UNQUALIFIED
;
8739 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8740 type
= build_pointer_type (type
);
8746 if (decl_context
== PARM
)
8748 decl
= cp_build_parm_decl (unqualified_id
, type
);
8750 bad_specifiers (decl
, "parameter", virtualp
,
8751 memfn_quals
!= TYPE_UNQUALIFIED
,
8752 inlinep
, friendp
, raises
!= NULL_TREE
);
8754 else if (decl_context
== FIELD
)
8756 /* The C99 flexible array extension. */
8757 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
8758 && TYPE_DOMAIN (type
) == NULL_TREE
)
8760 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
8761 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
8764 if (type
== error_mark_node
)
8766 /* Happens when declaring arrays of sizes which
8767 are error_mark_node, for example. */
8770 else if (in_namespace
&& !friendp
)
8772 /* Something like struct S { int N::j; }; */
8773 error ("invalid use of %<::%>");
8774 return error_mark_node
;
8776 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8779 tree function_context
;
8783 if (ctype
== NULL_TREE
)
8784 ctype
= current_class_type
;
8786 if (ctype
== NULL_TREE
)
8788 error ("can't make %qD into a method -- not in a class",
8790 return error_mark_node
;
8793 /* ``A union may [ ... ] not [ have ] virtual functions.''
8795 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
8797 error ("function %qD declared virtual inside a union",
8799 return error_mark_node
;
8802 if (NEW_DELETE_OPNAME_P (unqualified_id
))
8806 error ("%qD cannot be declared virtual, since it "
8812 else if (staticp
< 2)
8813 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8816 /* Check that the name used for a destructor makes sense. */
8817 if (sfk
== sfk_destructor
)
8821 gcc_assert (friendp
);
8822 error ("expected qualified name in friend declaration "
8823 "for destructor %qD",
8824 id_declarator
->u
.id
.unqualified_name
);
8825 return error_mark_node
;
8828 if (!same_type_p (TREE_OPERAND
8829 (id_declarator
->u
.id
.unqualified_name
, 0),
8832 error ("declaration of %qD as member of %qT",
8833 id_declarator
->u
.id
.unqualified_name
, ctype
);
8834 return error_mark_node
;
8837 else if (sfk
== sfk_constructor
&& friendp
)
8839 error ("expected qualified name in friend declaration "
8840 "for constructor %qD",
8841 id_declarator
->u
.id
.unqualified_name
);
8842 return error_mark_node
;
8845 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8846 function_context
= (ctype
!= NULL_TREE
) ?
8847 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
8848 publicp
= (! friendp
|| ! staticp
)
8849 && function_context
== NULL_TREE
;
8850 decl
= grokfndecl (ctype
, type
,
8851 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8852 ? unqualified_id
: dname
,
8855 virtualp
, flags
, memfn_quals
, raises
,
8856 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
8858 funcdef_flag
, template_count
, in_namespace
, attrlist
);
8859 if (decl
== NULL_TREE
)
8860 return error_mark_node
;
8862 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8863 /* The decl and setting of decl_attr is also turned off. */
8864 decl
= build_decl_attribute_variant (decl
, decl_attr
);
8867 /* [class.conv.ctor]
8869 A constructor declared without the function-specifier
8870 explicit that can be called with a single parameter
8871 specifies a conversion from the type of its first
8872 parameter to the type of its class. Such a constructor
8873 is called a converting constructor. */
8875 DECL_NONCONVERTING_P (decl
) = 1;
8876 else if (DECL_CONSTRUCTOR_P (decl
))
8878 /* The constructor can be called with exactly one
8879 parameter if there is at least one parameter, and
8880 any subsequent parameters have default arguments.
8881 Ignore any compiler-added parms. */
8882 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
8884 if (arg_types
== void_list_node
8886 && TREE_CHAIN (arg_types
)
8887 && TREE_CHAIN (arg_types
) != void_list_node
8888 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
8889 DECL_NONCONVERTING_P (decl
) = 1;
8892 else if (TREE_CODE (type
) == METHOD_TYPE
)
8894 /* We only get here for friend declarations of
8895 members of other classes. */
8896 /* All method decls are public, so tell grokfndecl to set
8897 TREE_PUBLIC, also. */
8898 decl
= grokfndecl (ctype
, type
,
8899 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8900 ? unqualified_id
: dname
,
8903 virtualp
, flags
, memfn_quals
, raises
,
8904 friendp
? -1 : 0, friendp
, 1, 0, sfk
,
8905 funcdef_flag
, template_count
, in_namespace
,
8907 if (decl
== NULL_TREE
)
8908 return error_mark_node
;
8910 else if (!staticp
&& !dependent_type_p (type
)
8911 && !COMPLETE_TYPE_P (complete_type (type
))
8912 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
8915 error ("field %qD has incomplete type", unqualified_id
);
8917 error ("name %qT has incomplete type", type
);
8919 /* If we're instantiating a template, tell them which
8920 instantiation made the field's type be incomplete. */
8921 if (current_class_type
8922 && TYPE_NAME (current_class_type
)
8923 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
8925 && declspecs
->type
== type
)
8926 error (" in instantiation of template %qT",
8927 current_class_type
);
8929 return error_mark_node
;
8935 error ("%qE is neither function nor member function; "
8936 "cannot be declared friend", unqualified_id
);
8944 /* Friends are treated specially. */
8945 if (ctype
== current_class_type
)
8946 ; /* We already issued a pedwarn. */
8947 else if (decl
&& DECL_NAME (decl
))
8949 if (template_class_depth (current_class_type
) == 0)
8951 decl
= check_explicit_specialization
8952 (unqualified_id
, decl
, template_count
,
8953 2 * funcdef_flag
+ 4);
8954 if (decl
== error_mark_node
)
8955 return error_mark_node
;
8958 decl
= do_friend (ctype
, unqualified_id
, decl
,
8964 return error_mark_node
;
8967 /* Structure field. It may not be a function, except for C++. */
8969 if (decl
== NULL_TREE
)
8975 /* An attempt is being made to initialize a non-static
8976 member. But, from [class.mem]:
8978 4 A member-declarator can contain a
8979 constant-initializer only if it declares a static
8980 member (_class.static_) of integral or enumeration
8981 type, see _class.static.data_.
8983 This used to be relatively common practice, but
8984 the rest of the compiler does not correctly
8985 handle the initialization unless the member is
8986 static so we make it static below. */
8987 pedwarn ("ISO C++ forbids initialization of member %qD",
8989 pedwarn ("making %qD static", unqualified_id
);
8993 if (uses_template_parms (type
))
8994 /* We'll check at instantiation time. */
8996 else if (check_static_variable_definition (unqualified_id
,
8998 /* If we just return the declaration, crashes
8999 will sometimes occur. We therefore return
9000 void_type_node, as if this was a friend
9001 declaration, to cause callers to completely
9002 ignore this declaration. */
9003 return error_mark_node
;
9008 /* C++ allows static class members. All other work
9009 for this is done by grokfield. */
9010 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
9011 set_linkage_for_static_data_member (decl
);
9012 /* Even if there is an in-class initialization, DECL
9013 is considered undefined until an out-of-class
9014 definition is provided. */
9015 DECL_EXTERNAL (decl
) = 1;
9018 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
9022 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
9023 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
9024 if (bitfield
&& !unqualified_id
)
9025 TREE_NO_WARNING (decl
) = 1;
9027 if (storage_class
== sc_mutable
)
9029 DECL_MUTABLE_P (decl
) = 1;
9030 storage_class
= sc_none
;
9034 bad_specifiers (decl
, "field", virtualp
,
9035 memfn_quals
!= TYPE_UNQUALIFIED
,
9036 inlinep
, friendp
, raises
!= NULL_TREE
);
9039 else if (TREE_CODE (type
) == FUNCTION_TYPE
9040 || TREE_CODE (type
) == METHOD_TYPE
)
9045 if (!unqualified_id
)
9046 return error_mark_node
;
9048 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
9049 original_name
= dname
;
9051 original_name
= unqualified_id
;
9053 if (storage_class
== sc_auto
)
9054 error ("storage class %<auto%> invalid for function %qs", name
);
9055 else if (storage_class
== sc_register
)
9056 error ("storage class %<register%> invalid for function %qs", name
);
9058 error ("storage class %<__thread%> invalid for function %qs", name
);
9060 /* Function declaration not at top level.
9061 Storage classes other than `extern' are not allowed
9062 and `extern' makes no difference. */
9063 if (! toplevel_bindings_p ()
9064 && (storage_class
== sc_static
9065 || declspecs
->specs
[(int)ds_inline
])
9068 if (storage_class
== sc_static
)
9069 pedwarn ("%<static%> specified invalid for function %qs "
9070 "declared out of global scope", name
);
9072 pedwarn ("%<inline%> specifier invalid for function %qs "
9073 "declared out of global scope", name
);
9076 if (ctype
== NULL_TREE
)
9080 error ("virtual non-class function %qs", name
);
9084 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
9085 && !NEW_DELETE_OPNAME_P (original_name
))
9086 type
= build_method_type_directly (ctype
,
9088 TYPE_ARG_TYPES (type
));
9090 /* Record presence of `static'. */
9091 publicp
= (ctype
!= NULL_TREE
9092 || storage_class
== sc_extern
9093 || storage_class
!= sc_static
);
9095 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
9096 virtualp
, flags
, memfn_quals
, raises
,
9098 publicp
, inlinep
, sfk
, funcdef_flag
,
9099 template_count
, in_namespace
, attrlist
);
9100 if (decl
== NULL_TREE
)
9101 return error_mark_node
;
9105 int invalid_static
= 0;
9107 /* Don't allow a static member function in a class, and forbid
9108 declaring main to be static. */
9109 if (TREE_CODE (type
) == METHOD_TYPE
)
9111 pedwarn ("cannot declare member function %qD to have "
9112 "static linkage", decl
);
9115 else if (current_function_decl
)
9117 /* FIXME need arm citation */
9118 error ("cannot declare static function inside another function");
9125 storage_class
= sc_none
;
9131 /* It's a variable. */
9133 /* An uninitialized decl with `extern' is a reference. */
9134 decl
= grokvardecl (type
, unqualified_id
,
9137 (type_quals
& TYPE_QUAL_CONST
) != 0,
9138 ctype
? ctype
: in_namespace
);
9139 bad_specifiers (decl
, "variable", virtualp
,
9140 memfn_quals
!= TYPE_UNQUALIFIED
,
9141 inlinep
, friendp
, raises
!= NULL_TREE
);
9145 DECL_CONTEXT (decl
) = ctype
;
9148 pedwarn ("%<static%> may not be used when defining "
9149 "(as opposed to declaring) a static data member");
9151 storage_class
= sc_none
;
9153 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
9155 error ("static member %qD declared %<register%>", decl
);
9156 storage_class
= sc_none
;
9158 if (storage_class
== sc_extern
&& pedantic
)
9160 pedwarn ("cannot explicitly declare member %q#D to have "
9163 storage_class
= sc_none
;
9168 /* Record `register' declaration for warnings on &
9169 and in case doing stupid register allocation. */
9171 if (storage_class
== sc_register
)
9172 DECL_REGISTER (decl
) = 1;
9173 else if (storage_class
== sc_extern
)
9174 DECL_THIS_EXTERN (decl
) = 1;
9175 else if (storage_class
== sc_static
)
9176 DECL_THIS_STATIC (decl
) = 1;
9178 /* Record constancy and volatility on the DECL itself . There's
9179 no need to do this when processing a template; we'll do this
9180 for the instantiated declaration based on the type of DECL. */
9181 if (!processing_template_decl
)
9182 cp_apply_type_quals_to_decl (type_quals
, decl
);
9185 TREE_NO_WARNING (decl
) = 1;
9191 /* Subroutine of start_function. Ensure that each of the parameter
9192 types (as listed in PARMS) is complete, as is required for a
9193 function definition. */
9196 require_complete_types_for_parms (tree parms
)
9198 for (; parms
; parms
= TREE_CHAIN (parms
))
9200 if (dependent_type_p (TREE_TYPE (parms
)))
9202 if (!VOID_TYPE_P (TREE_TYPE (parms
))
9203 && complete_type_or_else (TREE_TYPE (parms
), parms
))
9205 relayout_decl (parms
);
9206 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
9209 /* grokparms or complete_type_or_else will have already issued
9211 TREE_TYPE (parms
) = error_mark_node
;
9215 /* Returns nonzero if T is a local variable. */
9218 local_variable_p (const_tree t
)
9220 if ((TREE_CODE (t
) == VAR_DECL
9221 /* A VAR_DECL with a context that is a _TYPE is a static data
9223 && !TYPE_P (CP_DECL_CONTEXT (t
))
9224 /* Any other non-local variable must be at namespace scope. */
9225 && !DECL_NAMESPACE_SCOPE_P (t
))
9226 || (TREE_CODE (t
) == PARM_DECL
))
9232 /* Like local_variable_p, but suitable for use as a tree-walking
9236 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
9237 void *data ATTRIBUTE_UNUSED
)
9239 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
9241 else if (TYPE_P (*tp
))
9248 /* Check that ARG, which is a default-argument expression for a
9249 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9250 something goes wrong. DECL may also be a _TYPE node, rather than a
9251 DECL, if there is no DECL available. */
9254 check_default_argument (tree decl
, tree arg
)
9259 if (TREE_CODE (arg
) == DEFAULT_ARG
)
9260 /* We get a DEFAULT_ARG when looking at an in-class declaration
9261 with a default argument. Ignore the argument for now; we'll
9262 deal with it after the class is complete. */
9271 decl_type
= TREE_TYPE (decl
);
9273 if (arg
== error_mark_node
9274 || decl
== error_mark_node
9275 || TREE_TYPE (arg
) == error_mark_node
9276 || decl_type
== error_mark_node
)
9277 /* Something already went wrong. There's no need to check
9279 return error_mark_node
;
9281 /* [dcl.fct.default]
9283 A default argument expression is implicitly converted to the
9285 if (!TREE_TYPE (arg
)
9286 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
9289 error ("default argument for %q#D has type %qT",
9290 decl
, TREE_TYPE (arg
));
9292 error ("default argument for parameter of type %qT has type %qT",
9293 decl_type
, TREE_TYPE (arg
));
9295 return error_mark_node
;
9298 /* [dcl.fct.default]
9300 Local variables shall not be used in default argument
9303 The keyword `this' shall not be used in a default argument of a
9305 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
9308 error ("default argument %qE uses local variable %qD", arg
, var
);
9309 return error_mark_node
;
9316 /* Decode the list of parameter types for a function type.
9317 Given the list of things declared inside the parens,
9318 return a list of types.
9320 If this parameter does not end with an ellipsis, we append
9323 *PARMS is set to the chain of PARM_DECLs created. */
9326 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
9328 tree result
= NULL_TREE
;
9329 tree decls
= NULL_TREE
;
9330 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
9331 cp_parameter_declarator
*parm
;
9333 struct pointer_set_t
*unique_decls
= pointer_set_create ();
9335 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
9337 tree type
= NULL_TREE
;
9338 tree init
= parm
->default_argument
;
9342 if (parm
== no_parameters
)
9345 attrs
= parm
->decl_specifiers
.attributes
;
9346 parm
->decl_specifiers
.attributes
= NULL_TREE
;
9347 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
9348 PARM
, init
!= NULL_TREE
, &attrs
);
9349 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
9353 cplus_decl_attributes (&decl
, attrs
, 0);
9355 type
= TREE_TYPE (decl
);
9356 if (VOID_TYPE_P (type
))
9358 if (same_type_p (type
, void_type_node
)
9359 && DECL_SELF_REFERENCE_P (type
)
9360 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
9361 /* this is a parmlist of `(void)', which is ok. */
9363 cxx_incomplete_type_error (decl
, type
);
9364 /* It's not a good idea to actually create parameters of
9365 type `void'; other parts of the compiler assume that a
9366 void type terminates the parameter list. */
9367 type
= error_mark_node
;
9368 TREE_TYPE (decl
) = error_mark_node
;
9371 if (type
!= error_mark_node
9372 && TYPE_FOR_JAVA (type
)
9373 && IS_AGGR_TYPE (type
))
9375 error ("parameter %qD has Java class type", decl
);
9376 type
= error_mark_node
;
9377 TREE_TYPE (decl
) = error_mark_node
;
9381 if (type
!= error_mark_node
)
9383 /* Top-level qualifiers on the parameters are
9384 ignored for function types. */
9385 type
= cp_build_qualified_type (type
, 0);
9386 if (TREE_CODE (type
) == METHOD_TYPE
)
9388 error ("parameter %qD invalidly declared method type", decl
);
9389 type
= build_pointer_type (type
);
9390 TREE_TYPE (decl
) = type
;
9392 else if (abstract_virtuals_error (decl
, type
))
9393 any_error
= 1; /* Seems like a good idea. */
9394 else if (POINTER_TYPE_P (type
))
9396 /* [dcl.fct]/6, parameter types cannot contain pointers
9397 (references) to arrays of unknown bound. */
9398 tree t
= TREE_TYPE (type
);
9399 int ptr
= TYPE_PTR_P (type
);
9405 else if (TREE_CODE (t
) != ARRAY_TYPE
)
9407 else if (!TYPE_DOMAIN (t
))
9411 if (TREE_CODE (t
) == ARRAY_TYPE
)
9412 error ("parameter %qD includes %s to array of unknown "
9414 decl
, ptr
? "pointer" : "reference", t
);
9419 else if (init
&& !processing_template_decl
)
9420 init
= check_default_argument (decl
, init
);
9423 if (TREE_CODE (decl
) == PARM_DECL
9424 && FUNCTION_PARAMETER_PACK_P (decl
)
9426 error ("parameter packs must be at the end of the parameter list");
9428 if (DECL_NAME (decl
))
9430 if (pointer_set_contains (unique_decls
, DECL_NAME (decl
)))
9431 error ("multiple parameters named %qE", DECL_NAME (decl
));
9433 pointer_set_insert (unique_decls
, DECL_NAME (decl
));
9436 TREE_CHAIN (decl
) = decls
;
9438 result
= tree_cons (init
, type
, result
);
9440 decls
= nreverse (decls
);
9441 result
= nreverse (result
);
9443 result
= chainon (result
, void_list_node
);
9446 pointer_set_destroy (unique_decls
);
9451 /* D is a constructor or overloaded `operator='.
9453 Let T be the class in which D is declared. Then, this function
9456 -1 if D's is an ill-formed constructor or copy assignment operator
9457 whose first parameter is of type `T'.
9458 0 if D is not a copy constructor or copy assignment
9460 1 if D is a copy constructor or copy assignment operator whose
9461 first parameter is a reference to const qualified T.
9462 2 if D is a copy constructor or copy assignment operator whose
9463 first parameter is a reference to non-const qualified T.
9465 This function can be used as a predicate. Positive values indicate
9466 a copy constructor and nonzero values indicate a copy assignment
9470 copy_fn_p (const_tree d
)
9476 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
9478 if (TREE_CODE (d
) == TEMPLATE_DECL
9479 || (DECL_TEMPLATE_INFO (d
)
9480 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
9481 /* Instantiations of template member functions are never copy
9482 functions. Note that member functions of templated classes are
9483 represented as template functions internally, and we must
9484 accept those as copy functions. */
9487 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
9491 arg_type
= TREE_VALUE (args
);
9492 if (arg_type
== error_mark_node
)
9495 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
9497 /* Pass by value copy assignment operator. */
9500 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
9501 && !TYPE_REF_IS_RVALUE (arg_type
)
9502 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
9504 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
9510 args
= TREE_CHAIN (args
);
9512 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
9513 /* There are more non-optional args. */
9519 /* D is a constructor or overloaded `operator='.
9521 Let T be the class in which D is declared. Then, this function
9522 returns true when D is a move constructor or move assignment
9523 operator, false otherwise. */
9526 move_fn_p (const_tree d
)
9530 bool result
= false;
9532 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
9534 if (cxx_dialect
== cxx98
)
9535 /* There are no move constructors if we are in C++98 mode. */
9538 if (TREE_CODE (d
) == TEMPLATE_DECL
9539 || (DECL_TEMPLATE_INFO (d
)
9540 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
9541 /* Instantiations of template member functions are never copy
9542 functions. Note that member functions of templated classes are
9543 represented as template functions internally, and we must
9544 accept those as copy functions. */
9547 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
9551 arg_type
= TREE_VALUE (args
);
9552 if (arg_type
== error_mark_node
)
9555 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
9556 && TYPE_REF_IS_RVALUE (arg_type
)
9557 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
9561 args
= TREE_CHAIN (args
);
9563 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
9564 /* There are more non-optional args. */
9570 /* Remember any special properties of member function DECL. */
9572 void grok_special_member_properties (tree decl
)
9576 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
9579 class_type
= DECL_CONTEXT (decl
);
9580 if (DECL_CONSTRUCTOR_P (decl
))
9582 int ctor
= copy_fn_p (decl
);
9584 TYPE_HAS_CONSTRUCTOR (class_type
) = 1;
9590 A non-template constructor for class X is a copy
9591 constructor if its first parameter is of type X&, const
9592 X&, volatile X& or const volatile X&, and either there
9593 are no other parameters or else all other parameters have
9594 default arguments. */
9595 TYPE_HAS_INIT_REF (class_type
) = 1;
9597 TYPE_HAS_CONST_INIT_REF (class_type
) = 1;
9599 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
9600 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
9602 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
9606 A non-template assignment operator for class X is a copy
9607 assignment operator if its parameter is of type X, X&, const
9608 X&, volatile X& or const volatile X&. */
9610 int assop
= copy_fn_p (decl
);
9614 TYPE_HAS_ASSIGN_REF (class_type
) = 1;
9616 TYPE_HAS_CONST_ASSIGN_REF (class_type
) = 1;
9621 /* Check a constructor DECL has the correct form. Complains
9622 if the class has a constructor of the form X(X). */
9625 grok_ctor_properties (const_tree ctype
, const_tree decl
)
9627 int ctor_parm
= copy_fn_p (decl
);
9633 A declaration of a constructor for a class X is ill-formed if
9634 its first parameter is of type (optionally cv-qualified) X
9635 and either there are no other parameters or else all other
9636 parameters have default arguments.
9638 We *don't* complain about member template instantiations that
9639 have this form, though; they can occur as we try to decide
9640 what constructor to use during overload resolution. Since
9641 overload resolution will never prefer such a constructor to
9642 the non-template copy constructor (which is either explicitly
9643 or implicitly defined), there's no need to worry about their
9644 existence. Theoretically, they should never even be
9645 instantiated, but that's hard to forestall. */
9646 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9654 /* An operator with this code is unary, but can also be binary. */
9657 ambi_op_p (enum tree_code code
)
9659 return (code
== INDIRECT_REF
9660 || code
== ADDR_EXPR
9661 || code
== UNARY_PLUS_EXPR
9662 || code
== NEGATE_EXPR
9663 || code
== PREINCREMENT_EXPR
9664 || code
== PREDECREMENT_EXPR
);
9667 /* An operator with this name can only be unary. */
9670 unary_op_p (enum tree_code code
)
9672 return (code
== TRUTH_NOT_EXPR
9673 || code
== BIT_NOT_EXPR
9674 || code
== COMPONENT_REF
9675 || code
== TYPE_EXPR
);
9678 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9679 errors are issued for invalid declarations. */
9682 grok_op_properties (tree decl
, bool complain
)
9684 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
9686 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
9687 tree name
= DECL_NAME (decl
);
9688 enum tree_code operator_code
;
9693 /* Count the number of arguments and check for ellipsis. */
9694 for (argtype
= argtypes
, arity
= 0;
9695 argtype
&& argtype
!= void_list_node
;
9696 argtype
= TREE_CHAIN (argtype
))
9698 ellipsis_p
= !argtype
;
9700 class_type
= DECL_CONTEXT (decl
);
9701 if (class_type
&& !CLASS_TYPE_P (class_type
))
9702 class_type
= NULL_TREE
;
9704 if (DECL_CONV_FN_P (decl
))
9705 operator_code
= TYPE_EXPR
;
9709 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9710 if (ansi_opname (CODE) == name) \
9712 operator_code = (CODE); \
9715 else if (ansi_assopname (CODE) == name) \
9717 operator_code = (CODE); \
9718 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9722 #include "operators.def"
9728 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
9729 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
9732 switch (operator_code
)
9735 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
9739 TYPE_GETS_DELETE (class_type
) |= 1;
9743 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
9746 case VEC_DELETE_EXPR
:
9747 TYPE_GETS_DELETE (class_type
) |= 2;
9754 /* [basic.std.dynamic.allocation]/1:
9756 A program is ill-formed if an allocation function is declared
9757 in a namespace scope other than global scope or declared static
9760 The same also holds true for deallocation functions. */
9761 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
9762 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
9764 if (DECL_NAMESPACE_SCOPE_P (decl
))
9766 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
9768 error ("%qD may not be declared within a namespace", decl
);
9771 else if (!TREE_PUBLIC (decl
))
9773 error ("%qD may not be declared as static", decl
);
9779 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
9781 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
9782 DECL_IS_OPERATOR_NEW (decl
) = 1;
9784 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
9785 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
9788 /* An operator function must either be a non-static member function
9789 or have at least one parameter of a class, a reference to a class,
9790 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9791 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
9793 if (operator_code
== TYPE_EXPR
9794 || operator_code
== CALL_EXPR
9795 || operator_code
== COMPONENT_REF
9796 || operator_code
== ARRAY_REF
9797 || operator_code
== NOP_EXPR
)
9799 error ("%qD must be a nonstatic member function", decl
);
9806 if (DECL_STATIC_FUNCTION_P (decl
))
9808 error ("%qD must be either a non-static member "
9809 "function or a non-member function", decl
);
9813 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
9815 tree arg
= non_reference (TREE_VALUE (p
));
9816 if (arg
== error_mark_node
)
9819 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9820 because these checks are performed even on
9821 template functions. */
9822 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
9826 if (!p
|| p
== void_list_node
)
9829 error ("%qD must have an argument of class or "
9830 "enumerated type", decl
);
9836 /* There are no restrictions on the arguments to an overloaded
9838 if (operator_code
== CALL_EXPR
)
9841 /* Warn about conversion operators that will never be used. */
9842 if (IDENTIFIER_TYPENAME_P (name
)
9843 && ! DECL_TEMPLATE_INFO (decl
)
9845 /* Warn only declaring the function; there is no need to
9846 warn again about out-of-class definitions. */
9847 && class_type
== current_class_type
)
9849 tree t
= TREE_TYPE (name
);
9850 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
9851 const char *what
= 0;
9854 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
9856 if (TREE_CODE (t
) == VOID_TYPE
)
9858 else if (class_type
)
9860 if (t
== class_type
)
9861 what
= "the same type";
9862 /* Don't force t to be complete here. */
9863 else if (IS_AGGR_TYPE (t
)
9864 && COMPLETE_TYPE_P (t
)
9865 && DERIVED_FROM_P (t
, class_type
))
9866 what
= "a base class";
9870 warning (OPT_Wconversion
, "conversion to %s%s will never use a type "
9871 "conversion operator",
9872 ref
? "a reference to " : "", what
);
9875 if (operator_code
== COND_EXPR
)
9878 error ("ISO C++ prohibits overloading operator ?:");
9881 else if (ellipsis_p
)
9883 error ("%qD must not have variable number of arguments", decl
);
9886 else if (ambi_op_p (operator_code
))
9889 /* We pick the one-argument operator codes by default, so
9890 we don't have to change anything. */
9892 else if (arity
== 2)
9894 /* If we thought this was a unary operator, we now know
9895 it to be a binary operator. */
9896 switch (operator_code
)
9899 operator_code
= MULT_EXPR
;
9903 operator_code
= BIT_AND_EXPR
;
9906 case UNARY_PLUS_EXPR
:
9907 operator_code
= PLUS_EXPR
;
9911 operator_code
= MINUS_EXPR
;
9914 case PREINCREMENT_EXPR
:
9915 operator_code
= POSTINCREMENT_EXPR
;
9918 case PREDECREMENT_EXPR
:
9919 operator_code
= POSTDECREMENT_EXPR
;
9926 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
9928 if ((operator_code
== POSTINCREMENT_EXPR
9929 || operator_code
== POSTDECREMENT_EXPR
)
9930 && ! processing_template_decl
9931 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
9934 error ("postfix %qD must take %<int%> as its argument",
9937 error ("postfix %qD must take %<int%> as its second "
9945 error ("%qD must take either zero or one argument", decl
);
9947 error ("%qD must take either one or two arguments", decl
);
9951 /* More Effective C++ rule 6. */
9953 && (operator_code
== POSTINCREMENT_EXPR
9954 || operator_code
== POSTDECREMENT_EXPR
9955 || operator_code
== PREINCREMENT_EXPR
9956 || operator_code
== PREDECREMENT_EXPR
))
9958 tree arg
= TREE_VALUE (argtypes
);
9959 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
9960 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
9961 arg
= TREE_TYPE (arg
);
9962 arg
= TYPE_MAIN_VARIANT (arg
);
9963 if (operator_code
== PREINCREMENT_EXPR
9964 || operator_code
== PREDECREMENT_EXPR
)
9966 if (TREE_CODE (ret
) != REFERENCE_TYPE
9967 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
9969 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
9970 build_reference_type (arg
));
9974 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
9975 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
9979 else if (unary_op_p (operator_code
))
9984 error ("%qD must take %<void%>", decl
);
9986 error ("%qD must take exactly one argument", decl
);
9990 else /* if (binary_op_p (operator_code)) */
9995 error ("%qD must take exactly one argument", decl
);
9997 error ("%qD must take exactly two arguments", decl
);
10001 /* More Effective C++ rule 7. */
10003 && (operator_code
== TRUTH_ANDIF_EXPR
10004 || operator_code
== TRUTH_ORIF_EXPR
10005 || operator_code
== COMPOUND_EXPR
))
10006 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
10010 /* Effective C++ rule 23. */
10013 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
10014 && (operator_code
== PLUS_EXPR
10015 || operator_code
== MINUS_EXPR
10016 || operator_code
== TRUNC_DIV_EXPR
10017 || operator_code
== MULT_EXPR
10018 || operator_code
== TRUNC_MOD_EXPR
)
10019 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
10020 warning (OPT_Weffc__
, "%qD should return by value", decl
);
10022 /* [over.oper]/8 */
10023 for (; argtypes
&& argtypes
!= void_list_node
;
10024 argtypes
= TREE_CHAIN (argtypes
))
10025 if (TREE_PURPOSE (argtypes
))
10027 TREE_PURPOSE (argtypes
) = NULL_TREE
;
10028 if (operator_code
== POSTINCREMENT_EXPR
10029 || operator_code
== POSTDECREMENT_EXPR
)
10032 pedwarn ("%qD cannot have default arguments", decl
);
10036 error ("%qD cannot have default arguments", decl
);
10044 /* Return a string giving the keyword associate with CODE. */
10046 static const char *
10047 tag_name (enum tag_types code
)
10059 case typename_type
:
10062 gcc_unreachable ();
10066 /* Name lookup in an elaborated-type-specifier (after the keyword
10067 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10068 elaborated-type-specifier is invalid, issue a diagnostic and return
10069 error_mark_node; otherwise, return the *_TYPE to which it referred.
10070 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10073 check_elaborated_type_specifier (enum tag_types tag_code
,
10075 bool allow_template_p
)
10081 struct S { struct S *p; };
10083 name lookup will find the TYPE_DECL for the implicit "S::S"
10084 typedef. Adjust for that here. */
10085 if (DECL_SELF_REFERENCE_P (decl
))
10086 decl
= TYPE_NAME (TREE_TYPE (decl
));
10088 type
= TREE_TYPE (decl
);
10090 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10091 is false for this case as well. */
10092 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10094 error ("using template type parameter %qT after %qs",
10095 type
, tag_name (tag_code
));
10096 return error_mark_node
;
10100 If the identifier resolves to a typedef-name or a template
10101 type-parameter, the elaborated-type-specifier is ill-formed.
10103 In other words, the only legitimate declaration to use in the
10104 elaborated type specifier is the implicit typedef created when
10105 the type is declared. */
10106 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
10107 && tag_code
!= typename_type
)
10109 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
10110 error ("%q+D has a previous declaration here", decl
);
10111 return error_mark_node
;
10113 else if (TREE_CODE (type
) != RECORD_TYPE
10114 && TREE_CODE (type
) != UNION_TYPE
10115 && tag_code
!= enum_type
10116 && tag_code
!= typename_type
)
10118 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
10119 error ("%q+T has a previous declaration here", type
);
10120 return error_mark_node
;
10122 else if (TREE_CODE (type
) != ENUMERAL_TYPE
10123 && tag_code
== enum_type
)
10125 error ("%qT referred to as enum", type
);
10126 error ("%q+T has a previous declaration here", type
);
10127 return error_mark_node
;
10129 else if (!allow_template_p
10130 && TREE_CODE (type
) == RECORD_TYPE
10131 && CLASSTYPE_IS_TEMPLATE (type
))
10133 /* If a class template appears as elaborated type specifier
10134 without a template header such as:
10136 template <class T> class C {};
10137 void f(class C); // No template header here
10139 then the required template argument is missing. */
10140 error ("template argument required for %<%s %T%>",
10141 tag_name (tag_code
),
10142 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
10143 return error_mark_node
;
10149 /* Lookup NAME in elaborate type specifier in scope according to
10150 SCOPE and issue diagnostics if necessary.
10151 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10152 found, and ERROR_MARK_NODE for type error. */
10155 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
10156 tag_scope scope
, bool template_header_p
)
10160 if (scope
== ts_global
)
10162 /* First try ordinary name lookup, ignoring hidden class name
10163 injected via friend declaration. */
10164 decl
= lookup_name_prefer_type (name
, 2);
10165 /* If that fails, the name will be placed in the smallest
10166 non-class, non-function-prototype scope according to 3.3.1/5.
10167 We may already have a hidden name declared as friend in this
10168 scope. So lookup again but not ignoring hidden names.
10169 If we find one, that name will be made visible rather than
10170 creating a new tag. */
10172 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
10175 decl
= lookup_type_scope (name
, scope
);
10177 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
10178 decl
= DECL_TEMPLATE_RESULT (decl
);
10180 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
10182 /* Look for invalid nested type:
10186 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
10188 error ("%qD has the same name as the class in which it is "
10191 return error_mark_node
;
10194 /* Two cases we need to consider when deciding if a class
10195 template is allowed as an elaborated type specifier:
10196 1. It is a self reference to its own class.
10197 2. It comes with a template header.
10201 template <class T> class C {
10202 class C *c1; // DECL_SELF_REFERENCE_P is true
10205 template <class U> class C; // template_header_p is true
10206 template <class T> class C<T>::D {
10207 class C *c2; // DECL_SELF_REFERENCE_P is true
10210 t
= check_elaborated_type_specifier (tag_code
,
10213 | DECL_SELF_REFERENCE_P (decl
));
10216 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
10218 error ("reference to %qD is ambiguous", name
);
10219 print_candidates (decl
);
10220 return error_mark_node
;
10226 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10227 Define the tag as a forward-reference if it is not defined.
10229 If a declaration is given, process it here, and report an error if
10230 multiple declarations are not identical.
10232 SCOPE is TS_CURRENT when this is also a definition. Only look in
10233 the current frame for the name (since C++ allows new names in any
10234 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10235 declaration. Only look beginning from the current scope outward up
10236 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10238 TEMPLATE_HEADER_P is true when this declaration is preceded by
10239 a set of template parameters. */
10242 xref_tag (enum tag_types tag_code
, tree name
,
10243 tag_scope scope
, bool template_header_p
)
10245 enum tree_code code
;
10247 tree context
= NULL_TREE
;
10249 timevar_push (TV_NAME_LOOKUP
);
10251 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10257 code
= RECORD_TYPE
;
10263 code
= ENUMERAL_TYPE
;
10266 gcc_unreachable ();
10269 /* In case of anonymous name, xref_tag is only called to
10270 make type node and push name. Name lookup is not required. */
10271 if (ANON_AGGRNAME_P (name
))
10274 t
= lookup_and_check_tag (tag_code
, name
,
10275 scope
, template_header_p
);
10277 if (t
== error_mark_node
)
10278 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10280 if (scope
!= ts_current
&& t
&& current_class_type
10281 && template_class_depth (current_class_type
)
10282 && template_header_p
)
10284 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10285 definition of this tag. Since, in addition, we are currently
10286 processing a (member) template declaration of a template
10287 class, we must be very careful; consider:
10294 { template <class V>
10295 friend struct S1; };
10297 Here, the S2::S1 declaration should not be confused with the
10298 outer declaration. In particular, the inner version should
10299 have a template parameter of level 2, not level 1. This
10300 would be particularly important if the member declaration
10303 template <class V = U> friend struct S1;
10305 say, when we should tsubst into `U' when instantiating
10306 S2. On the other hand, when presented with:
10316 we must find the inner binding eventually. We
10317 accomplish this by making sure that the new type we
10318 create to represent this declaration has the right
10320 context
= TYPE_CONTEXT (t
);
10326 /* If no such tag is yet defined, create a forward-reference node
10327 and record it as the "definition".
10328 When a real declaration of this type is found,
10329 the forward-reference will be altered into a real type. */
10330 if (code
== ENUMERAL_TYPE
)
10332 error ("use of enum %q#D without previous declaration", name
);
10333 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10337 t
= make_aggr_type (code
);
10338 TYPE_CONTEXT (t
) = context
;
10339 t
= pushtag (name
, t
, scope
);
10344 if (template_header_p
&& IS_AGGR_TYPE (t
))
10346 if (!redeclare_class_template (t
, current_template_parms
))
10347 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10349 else if (!processing_template_decl
10350 && CLASS_TYPE_P (t
)
10351 && CLASSTYPE_IS_TEMPLATE (t
))
10353 error ("redeclaration of %qT as a non-template", t
);
10354 error ("previous declaration %q+D", t
);
10355 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10358 /* Make injected friend class visible. */
10359 if (scope
!= ts_within_enclosing_non_class
10360 && hidden_name_p (TYPE_NAME (t
)))
10362 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
10363 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
10365 if (TYPE_TEMPLATE_INFO (t
))
10367 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
10368 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
10373 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
10377 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
10379 enum tag_types tag_kind
;
10381 if (TREE_CODE (old
) == RECORD_TYPE
)
10382 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
10384 tag_kind
= union_type
;
10386 if (id
== NULL_TREE
)
10387 id
= TYPE_IDENTIFIER (old
);
10389 return xref_tag (tag_kind
, id
, scope
, false);
10392 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10393 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10394 access_* node, and the TREE_VALUE is the type of the base-class.
10395 Non-NULL TREE_TYPE indicates virtual inheritance.
10397 Returns true if the binfo hierarchy was successfully created,
10398 false if an error was detected. */
10401 xref_basetypes (tree ref
, tree base_list
)
10404 tree binfo
, base_binfo
;
10405 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
10406 unsigned max_bases
= 0; /* Maximum direct bases. */
10408 tree default_access
;
10409 tree igo_prev
; /* Track Inheritance Graph Order. */
10411 if (ref
== error_mark_node
)
10414 /* The base of a derived class is private by default, all others are
10416 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
10417 && CLASSTYPE_DECLARED_CLASS (ref
)
10418 ? access_private_node
: access_public_node
);
10420 /* First, make sure that any templates in base-classes are
10421 instantiated. This ensures that if we call ourselves recursively
10422 we do not get confused about which classes are marked and which
10424 basep
= &base_list
;
10427 tree basetype
= TREE_VALUE (*basep
);
10429 if (!(processing_template_decl
&& uses_template_parms (basetype
))
10430 && !complete_type_or_else (basetype
, NULL
))
10431 /* An incomplete type. Remove it from the list. */
10432 *basep
= TREE_CHAIN (*basep
);
10436 if (TREE_TYPE (*basep
))
10438 if (CLASS_TYPE_P (basetype
))
10439 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
10440 basep
= &TREE_CHAIN (*basep
);
10444 TYPE_MARKED_P (ref
) = 1;
10446 /* The binfo slot should be empty, unless this is an (ill-formed)
10448 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
10449 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
10451 binfo
= make_tree_binfo (max_bases
);
10453 TYPE_BINFO (ref
) = binfo
;
10454 BINFO_OFFSET (binfo
) = size_zero_node
;
10455 BINFO_TYPE (binfo
) = ref
;
10459 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
10460 /* An aggregate cannot have baseclasses. */
10461 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
10463 if (TREE_CODE (ref
) == UNION_TYPE
)
10465 error ("derived union %qT invalid", ref
);
10472 if (TYPE_FOR_JAVA (ref
))
10474 error ("Java class %qT cannot have multiple bases", ref
);
10481 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
10483 if (TYPE_FOR_JAVA (ref
))
10485 error ("Java class %qT cannot have virtual bases", ref
);
10490 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
10492 tree access
= TREE_PURPOSE (base_list
);
10493 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
10494 tree basetype
= TREE_VALUE (base_list
);
10496 if (access
== access_default_node
)
10497 access
= default_access
;
10499 if (PACK_EXPANSION_P (basetype
))
10500 basetype
= PACK_EXPANSION_PATTERN (basetype
);
10501 if (TREE_CODE (basetype
) == TYPE_DECL
)
10502 basetype
= TREE_TYPE (basetype
);
10503 if (TREE_CODE (basetype
) != RECORD_TYPE
10504 && TREE_CODE (basetype
) != TYPENAME_TYPE
10505 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
10506 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
10508 error ("base type %qT fails to be a struct or class type",
10513 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
10514 TYPE_FOR_JAVA (ref
) = 1;
10516 base_binfo
= NULL_TREE
;
10517 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
10519 base_binfo
= TYPE_BINFO (basetype
);
10520 /* The original basetype could have been a typedef'd type. */
10521 basetype
= BINFO_TYPE (base_binfo
);
10523 /* Inherit flags from the base. */
10524 TYPE_HAS_NEW_OPERATOR (ref
)
10525 |= TYPE_HAS_NEW_OPERATOR (basetype
);
10526 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
10527 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
10528 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
10529 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
10530 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
10531 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
10532 CLASSTYPE_REPEATED_BASE_P (ref
)
10533 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
10536 /* We must do this test after we've seen through a typedef
10538 if (TYPE_MARKED_P (basetype
))
10540 if (basetype
== ref
)
10541 error ("recursive type %qT undefined", basetype
);
10543 error ("duplicate base type %qT invalid", basetype
);
10547 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
10548 /* Regenerate the pack expansion for the bases. */
10549 basetype
= make_pack_expansion (basetype
);
10551 TYPE_MARKED_P (basetype
) = 1;
10553 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
10554 &igo_prev
, via_virtual
);
10555 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
10556 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
10558 BINFO_BASE_APPEND (binfo
, base_binfo
);
10559 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
10562 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
10563 /* If we have space in the vbase vector, we must have shared at
10564 least one of them, and are therefore diamond shaped. */
10565 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
10567 /* Unmark all the types. */
10568 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
10569 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
10570 TYPE_MARKED_P (ref
) = 0;
10572 /* Now see if we have a repeated base type. */
10573 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
10575 for (base_binfo
= binfo
; base_binfo
;
10576 base_binfo
= TREE_CHAIN (base_binfo
))
10578 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
10580 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
10583 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
10585 for (base_binfo
= binfo
; base_binfo
;
10586 base_binfo
= TREE_CHAIN (base_binfo
))
10587 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
10588 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
10597 /* Begin compiling the definition of an enumeration type.
10599 Returns the type object, as yet incomplete.
10600 Also records info about it so that build_enumerator
10601 may be used to declare the individual values as they are read. */
10604 start_enum (tree name
)
10608 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10610 /* If this is the real definition for a previous forward reference,
10611 fill in the contents in the same object that used to be the
10612 forward reference. */
10614 enumtype
= lookup_and_check_tag (enum_type
, name
,
10615 /*tag_scope=*/ts_current
,
10616 /*template_header_p=*/false);
10618 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
10620 error ("multiple definition of %q#T", enumtype
);
10621 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
10622 /* Clear out TYPE_VALUES, and start again. */
10623 TYPE_VALUES (enumtype
) = NULL_TREE
;
10627 /* In case of error, make a dummy enum to allow parsing to
10629 if (enumtype
== error_mark_node
)
10630 name
= make_anon_name ();
10632 enumtype
= make_node (ENUMERAL_TYPE
);
10633 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
10639 /* After processing and defining all the values of an enumeration type,
10640 install their decls in the enumeration type and finish it off.
10641 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10644 finish_enum (tree enumtype
)
10653 bool use_short_enum
;
10657 integer_type_kind itk
;
10658 tree underlying_type
= NULL_TREE
;
10660 /* We built up the VALUES in reverse order. */
10661 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
10663 /* For an enum defined in a template, just set the type of the values;
10664 all further processing is postponed until the template is
10665 instantiated. We need to set the type so that tsubst of a CONST_DECL
10667 if (processing_template_decl
)
10669 for (values
= TYPE_VALUES (enumtype
);
10671 values
= TREE_CHAIN (values
))
10672 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
10673 if (at_function_scope_p ())
10674 add_stmt (build_min (TAG_DEFN
, enumtype
));
10678 /* Determine the minimum and maximum values of the enumerators. */
10679 if (TYPE_VALUES (enumtype
))
10681 minnode
= maxnode
= NULL_TREE
;
10683 for (values
= TYPE_VALUES (enumtype
);
10685 values
= TREE_CHAIN (values
))
10687 decl
= TREE_VALUE (values
);
10689 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10690 each enumerator has the type of its enumeration. Prior to the
10691 closing brace, the type of each enumerator is the type of its
10692 initializing value. */
10693 TREE_TYPE (decl
) = enumtype
;
10695 /* Update the minimum and maximum values, if appropriate. */
10696 value
= DECL_INITIAL (decl
);
10697 if (value
== error_mark_node
)
10698 value
= integer_zero_node
;
10699 /* Figure out what the minimum and maximum values of the
10700 enumerators are. */
10702 minnode
= maxnode
= value
;
10703 else if (tree_int_cst_lt (maxnode
, value
))
10705 else if (tree_int_cst_lt (value
, minnode
))
10712 If the enumerator-list is empty, the underlying type is as if
10713 the enumeration had a single enumerator with value 0. */
10714 minnode
= maxnode
= integer_zero_node
;
10716 /* Compute the number of bits require to represent all values of the
10717 enumeration. We must do this before the type of MINNODE and
10718 MAXNODE are transformed, since min_precision relies on the
10719 TREE_TYPE of the value it is passed. */
10720 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
10721 lowprec
= min_precision (minnode
, unsignedp
);
10722 highprec
= min_precision (maxnode
, unsignedp
);
10723 precision
= MAX (lowprec
, highprec
);
10725 /* Determine the underlying type of the enumeration.
10729 The underlying type of an enumeration is an integral type that
10730 can represent all the enumerator values defined in the
10731 enumeration. It is implementation-defined which integral type is
10732 used as the underlying type for an enumeration except that the
10733 underlying type shall not be larger than int unless the value of
10734 an enumerator cannot fit in an int or unsigned int.
10736 We use "int" or an "unsigned int" as the underlying type, even if
10737 a smaller integral type would work, unless the user has
10738 explicitly requested that we use the smallest possible type. The
10739 user can request that for all enumerations with a command line
10740 flag, or for just one enumeration with an attribute. */
10742 use_short_enum
= flag_short_enums
10743 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
10745 for (itk
= (use_short_enum
? itk_char
: itk_int
);
10749 underlying_type
= integer_types
[itk
];
10750 if (TYPE_PRECISION (underlying_type
) >= precision
10751 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
10754 if (itk
== itk_none
)
10758 IF no integral type can represent all the enumerator values, the
10759 enumeration is ill-formed. */
10760 error ("no integral type can represent all of the enumerator values "
10761 "for %qT", enumtype
);
10762 precision
= TYPE_PRECISION (long_long_integer_type_node
);
10763 underlying_type
= integer_types
[itk_unsigned_long_long
];
10766 /* Compute the minium and maximum values for the type.
10770 For an enumeration where emin is the smallest enumerator and emax
10771 is the largest, the values of the enumeration are the values of the
10772 underlying type in the range bmin to bmax, where bmin and bmax are,
10773 respectively, the smallest and largest values of the smallest bit-
10774 field that can store emin and emax. */
10776 /* The middle-end currently assumes that types with TYPE_PRECISION
10777 narrower than their underlying type are suitably zero or sign
10778 extended to fill their mode. g++ doesn't make these guarantees.
10779 Until the middle-end can represent such paradoxical types, we
10780 set the TYPE_PRECISION to the width of the underlying type. */
10781 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
10783 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
10787 The value of sizeof() applied to an enumeration type, an object
10788 of an enumeration type, or an enumerator, is the value of sizeof()
10789 applied to the underlying type. */
10790 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
10791 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
10792 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
10793 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
10794 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
10795 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
10797 /* Convert each of the enumerators to the type of the underlying
10798 type of the enumeration. */
10799 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
10801 location_t saved_location
;
10803 decl
= TREE_VALUE (values
);
10804 saved_location
= input_location
;
10805 input_location
= DECL_SOURCE_LOCATION (decl
);
10806 value
= perform_implicit_conversion (underlying_type
,
10807 DECL_INITIAL (decl
));
10808 input_location
= saved_location
;
10810 /* Do not clobber shared ints. */
10811 value
= copy_node (value
);
10813 TREE_TYPE (value
) = enumtype
;
10814 DECL_INITIAL (decl
) = value
;
10815 TREE_VALUE (values
) = value
;
10818 /* Fix up all variant types of this enum type. */
10819 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
10821 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
10822 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
10823 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
10824 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
10825 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
10826 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
10827 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
10828 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
10829 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
10830 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
10833 /* Finish debugging output for this type. */
10834 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
10837 /* Build and install a CONST_DECL for an enumeration constant of the
10838 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10839 Assignment of sequential values by default is handled here. */
10842 build_enumerator (tree name
, tree value
, tree enumtype
)
10848 /* If the VALUE was erroneous, pretend it wasn't there; that will
10849 result in the enum being assigned the next value in sequence. */
10850 if (value
== error_mark_node
)
10853 /* Remove no-op casts from the value. */
10855 STRIP_TYPE_NOPS (value
);
10857 if (! processing_template_decl
)
10859 /* Validate and default VALUE. */
10860 if (value
!= NULL_TREE
)
10862 value
= integral_constant_value (value
);
10864 if (TREE_CODE (value
) == INTEGER_CST
)
10866 value
= perform_integral_promotions (value
);
10867 constant_expression_warning (value
);
10871 error ("enumerator value for %qD is not an integer constant", name
);
10876 /* Default based on previous value. */
10877 if (value
== NULL_TREE
)
10879 if (TYPE_VALUES (enumtype
))
10882 unsigned HOST_WIDE_INT lo
;
10886 /* The next value is the previous value plus one. We can
10887 safely assume that the previous value is an INTEGER_CST.
10888 add_double doesn't know the type of the target expression,
10889 so we must check with int_fits_type_p as well. */
10890 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
10891 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
10892 TREE_INT_CST_HIGH (prev_value
),
10894 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
10895 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
10899 error ("overflow in enumeration values at %qD", name
);
10900 value
= error_mark_node
;
10904 value
= integer_zero_node
;
10907 /* Remove no-op casts from the value. */
10908 STRIP_TYPE_NOPS (value
);
10911 /* C++ associates enums with global, function, or class declarations. */
10912 context
= current_scope ();
10914 /* Build the actual enumeration constant. Note that the enumeration
10915 constants have the type of their initializers until the
10916 enumeration is complete:
10920 Following the closing brace of an enum-specifier, each enumer-
10921 ator has the type of its enumeration. Prior to the closing
10922 brace, the type of each enumerator is the type of its
10923 initializing value.
10925 In finish_enum we will reset the type. Of course, if we're
10926 processing a template, there may be no value. */
10927 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
10929 if (context
&& context
== current_class_type
)
10930 /* This enum declaration is local to the class. We need the full
10931 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10932 decl
= build_lang_decl (CONST_DECL
, name
, type
);
10934 /* It's a global enum, or it's local to a function. (Note local to
10935 a function could mean local to a class method. */
10936 decl
= build_decl (CONST_DECL
, name
, type
);
10938 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
10939 TREE_CONSTANT (decl
) = 1;
10940 TREE_INVARIANT (decl
) = 1;
10941 TREE_READONLY (decl
) = 1;
10942 DECL_INITIAL (decl
) = value
;
10944 if (context
&& context
== current_class_type
)
10945 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10946 on the TYPE_FIELDS list for `S'. (That's so that you can say
10947 things like `S::i' later.) */
10948 finish_member_declaration (decl
);
10952 /* Add this enumeration constant to the list for this type. */
10953 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
10957 /* We're defining DECL. Make sure that it's type is OK. */
10960 check_function_type (tree decl
, tree current_function_parms
)
10962 tree fntype
= TREE_TYPE (decl
);
10963 tree return_type
= complete_type (TREE_TYPE (fntype
));
10965 /* In a function definition, arg types must be complete. */
10966 require_complete_types_for_parms (current_function_parms
);
10968 if (dependent_type_p (return_type
))
10970 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
10971 || (TYPE_FOR_JAVA (return_type
) && IS_AGGR_TYPE (return_type
)))
10973 tree args
= TYPE_ARG_TYPES (fntype
);
10975 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
10976 error ("return type %q#T is incomplete", return_type
);
10978 error ("return type has Java class type %q#T", return_type
);
10980 /* Make it return void instead. */
10981 if (TREE_CODE (fntype
) == METHOD_TYPE
)
10982 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
10984 TREE_CHAIN (args
));
10986 fntype
= build_function_type (void_type_node
, args
);
10988 = build_exception_variant (fntype
,
10989 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
10992 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
10995 /* Create the FUNCTION_DECL for a function definition.
10996 DECLSPECS and DECLARATOR are the parts of the declaration;
10997 they describe the function's name and the type it returns,
10998 but twisted together in a fashion that parallels the syntax of C.
11000 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11001 DECLARATOR is really the DECL for the function we are about to
11002 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11003 indicating that the function is an inline defined in-class.
11005 This function creates a binding context for the function body
11006 as well as setting up the FUNCTION_DECL in current_function_decl.
11008 For C++, we must first check whether that datum makes any sense.
11009 For example, "class A local_a(1,2);" means that variable local_a
11010 is an aggregate of type A, which should have a constructor
11011 applied to it with the argument list [1, 2].
11013 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11014 or may be a BLOCK if the function has been defined previously
11015 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11016 error_mark_node if the function has never been defined, or
11017 a BLOCK if the function has been defined somewhere. */
11020 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
11022 tree ctype
= NULL_TREE
;
11025 int doing_friend
= 0;
11026 struct cp_binding_level
*bl
;
11027 tree current_function_parms
;
11028 struct c_fileinfo
*finfo
11029 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
11030 bool honor_interface
;
11032 /* Sanity check. */
11033 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
11034 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
11036 fntype
= TREE_TYPE (decl1
);
11037 if (TREE_CODE (fntype
) == METHOD_TYPE
)
11038 ctype
= TYPE_METHOD_BASETYPE (fntype
);
11040 /* ISO C++ 11.4/5. A friend function defined in a class is in
11041 the (lexical) scope of the class in which it is defined. */
11042 if (!ctype
&& DECL_FRIEND_P (decl1
))
11044 ctype
= DECL_FRIEND_CONTEXT (decl1
);
11046 /* CTYPE could be null here if we're dealing with a template;
11047 for example, `inline friend float foo()' inside a template
11048 will have no CTYPE set. */
11049 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
11055 if (DECL_DECLARED_INLINE_P (decl1
)
11056 && lookup_attribute ("noinline", attrs
))
11057 warning (0, "inline function %q+D given attribute noinline", decl1
);
11059 /* Handle gnu_inline attribute. */
11060 if (GNU_INLINE_P (decl1
))
11062 DECL_EXTERNAL (decl1
) = 1;
11063 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
11064 DECL_INTERFACE_KNOWN (decl1
) = 1;
11065 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
11068 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
11069 /* This is a constructor, we must ensure that any default args
11070 introduced by this definition are propagated to the clones
11071 now. The clones are used directly in overload resolution. */
11072 adjust_clone_args (decl1
);
11074 /* Sometimes we don't notice that a function is a static member, and
11075 build a METHOD_TYPE for it. Fix that up now. */
11076 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
11077 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
11079 revert_static_member_fn (decl1
);
11083 /* Set up current_class_type, and enter the scope of the class, if
11086 push_nested_class (ctype
);
11087 else if (DECL_STATIC_FUNCTION_P (decl1
))
11088 push_nested_class (DECL_CONTEXT (decl1
));
11090 /* Now that we have entered the scope of the class, we must restore
11091 the bindings for any template parameters surrounding DECL1, if it
11092 is an inline member template. (Order is important; consider the
11093 case where a template parameter has the same name as a field of
11094 the class.) It is not until after this point that
11095 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11096 if (flags
& SF_INCLASS_INLINE
)
11097 maybe_begin_member_template_processing (decl1
);
11099 /* Effective C++ rule 15. */
11101 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
11102 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
11103 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
11105 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11106 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11107 if (!DECL_INITIAL (decl1
))
11108 DECL_INITIAL (decl1
) = error_mark_node
;
11110 /* This function exists in static storage.
11111 (This does not mean `static' in the C sense!) */
11112 TREE_STATIC (decl1
) = 1;
11114 /* We must call push_template_decl after current_class_type is set
11115 up. (If we are processing inline definitions after exiting a
11116 class scope, current_class_type will be NULL_TREE until set above
11117 by push_nested_class.) */
11118 if (processing_template_decl
)
11120 /* FIXME: Handle error_mark_node more gracefully. */
11121 tree newdecl1
= push_template_decl (decl1
);
11122 if (newdecl1
!= error_mark_node
)
11126 /* We are now in the scope of the function being defined. */
11127 current_function_decl
= decl1
;
11129 /* Save the parm names or decls from this function's declarator
11130 where store_parm_decls will find them. */
11131 current_function_parms
= DECL_ARGUMENTS (decl1
);
11133 /* Make sure the parameter and return types are reasonable. When
11134 you declare a function, these types can be incomplete, but they
11135 must be complete when you define the function. */
11136 check_function_type (decl1
, current_function_parms
);
11138 /* Build the return declaration for the function. */
11139 restype
= TREE_TYPE (fntype
);
11140 if (DECL_RESULT (decl1
) == NULL_TREE
)
11144 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
11145 DECL_ARTIFICIAL (resdecl
) = 1;
11146 DECL_IGNORED_P (resdecl
) = 1;
11147 DECL_RESULT (decl1
) = resdecl
;
11149 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
11152 /* Let the user know we're compiling this function. */
11153 announce_function (decl1
);
11155 /* Record the decl so that the function name is defined.
11156 If we already have a decl for this name, and it is a FUNCTION_DECL,
11157 use the old decl. */
11158 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
11160 /* A specialization is not used to guide overload resolution. */
11161 if (!DECL_FUNCTION_MEMBER_P (decl1
)
11162 && !(DECL_USE_TEMPLATE (decl1
) &&
11163 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
11165 tree olddecl
= pushdecl (decl1
);
11167 if (olddecl
== error_mark_node
)
11168 /* If something went wrong when registering the declaration,
11169 use DECL1; we have to have a FUNCTION_DECL to use when
11170 parsing the body of the function. */
11174 /* Otherwise, OLDDECL is either a previous declaration
11175 of the same function or DECL1 itself. */
11177 if (warn_missing_declarations
11178 && olddecl
== decl1
11179 && !DECL_MAIN_P (decl1
)
11180 && TREE_PUBLIC (decl1
)
11181 && !DECL_DECLARED_INLINE_P (decl1
))
11185 /* Check whether DECL1 is in an anonymous
11187 for (context
= DECL_CONTEXT (decl1
);
11189 context
= DECL_CONTEXT (context
))
11191 if (TREE_CODE (context
) == NAMESPACE_DECL
11192 && DECL_NAME (context
) == NULL_TREE
)
11196 if (context
== NULL
)
11197 warning (OPT_Wmissing_declarations
,
11198 "no previous declaration for %q+D", decl1
);
11206 /* We need to set the DECL_CONTEXT. */
11207 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
11208 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
11210 fntype
= TREE_TYPE (decl1
);
11212 /* If #pragma weak applies, mark the decl appropriately now.
11213 The pragma only applies to global functions. Because
11214 determining whether or not the #pragma applies involves
11215 computing the mangled name for the declaration, we cannot
11216 apply the pragma until after we have merged this declaration
11217 with any previous declarations; if the original declaration
11218 has a linkage specification, that specification applies to
11219 the definition as well, and may affect the mangled name. */
11220 if (!DECL_CONTEXT (decl1
))
11221 maybe_apply_pragma_weak (decl1
);
11224 /* Reset this in case the call to pushdecl changed it. */
11225 current_function_decl
= decl1
;
11227 gcc_assert (DECL_INITIAL (decl1
));
11229 /* This function may already have been parsed, in which case just
11230 return; our caller will skip over the body without parsing. */
11231 if (DECL_INITIAL (decl1
) != error_mark_node
)
11234 /* Initialize RTL machinery. We cannot do this until
11235 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11236 even when processing a template; this is how we get
11237 CFUN set up, and our per-function variables initialized.
11238 FIXME factor out the non-RTL stuff. */
11239 bl
= current_binding_level
;
11240 allocate_struct_function (decl1
, processing_template_decl
);
11241 current_binding_level
= bl
;
11243 /* Even though we're inside a function body, we still don't want to
11244 call expand_expr to calculate the size of a variable-sized array.
11245 We haven't necessarily assigned RTL to all variables yet, so it's
11246 not safe to try to expand expressions involving them. */
11247 cfun
->x_dont_save_pending_sizes_p
= 1;
11249 /* Start the statement-tree, start the tree now. */
11250 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
11252 /* If we are (erroneously) defining a function that we have already
11253 defined before, wipe out what we knew before. */
11254 if (!DECL_PENDING_INLINE_P (decl1
))
11255 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
11257 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
11259 /* We know that this was set up by `grokclassfn'. We do not
11260 wait until `store_parm_decls', since evil parse errors may
11261 never get us to that point. Here we keep the consistency
11262 between `current_class_type' and `current_class_ptr'. */
11263 tree t
= DECL_ARGUMENTS (decl1
);
11265 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
11266 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
11268 cp_function_chain
->x_current_class_ref
11269 = build_indirect_ref (t
, NULL
);
11270 cp_function_chain
->x_current_class_ptr
= t
;
11272 /* Constructors and destructors need to know whether they're "in
11273 charge" of initializing virtual base classes. */
11274 t
= TREE_CHAIN (t
);
11275 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
11277 current_in_charge_parm
= t
;
11278 t
= TREE_CHAIN (t
);
11280 if (DECL_HAS_VTT_PARM_P (decl1
))
11282 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
11283 current_vtt_parm
= t
;
11287 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
11288 /* Implicitly-defined methods (like the
11289 destructor for a class in which no destructor
11290 is explicitly declared) must not be defined
11291 until their definition is needed. So, we
11292 ignore interface specifications for
11293 compiler-generated functions. */
11294 && !DECL_ARTIFICIAL (decl1
));
11296 if (DECL_INTERFACE_KNOWN (decl1
))
11298 tree ctx
= decl_function_context (decl1
);
11300 if (DECL_NOT_REALLY_EXTERN (decl1
))
11301 DECL_EXTERNAL (decl1
) = 0;
11303 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
11304 && TREE_PUBLIC (ctx
))
11305 /* This is a function in a local class in an extern inline
11307 comdat_linkage (decl1
);
11309 /* If this function belongs to an interface, it is public.
11310 If it belongs to someone else's interface, it is also external.
11311 This only affects inlines and template instantiations. */
11312 else if (!finfo
->interface_unknown
&& honor_interface
)
11314 if (DECL_DECLARED_INLINE_P (decl1
)
11315 || DECL_TEMPLATE_INSTANTIATION (decl1
)
11316 || processing_template_decl
)
11318 DECL_EXTERNAL (decl1
)
11319 = (finfo
->interface_only
11320 || (DECL_DECLARED_INLINE_P (decl1
)
11321 && ! flag_implement_inlines
11322 && !DECL_VINDEX (decl1
)));
11324 /* For WIN32 we also want to put these in linkonce sections. */
11325 maybe_make_one_only (decl1
);
11328 DECL_EXTERNAL (decl1
) = 0;
11329 DECL_INTERFACE_KNOWN (decl1
) = 1;
11330 /* If this function is in an interface implemented in this file,
11331 make sure that the back end knows to emit this function
11333 if (!DECL_EXTERNAL (decl1
))
11334 mark_needed (decl1
);
11336 else if (finfo
->interface_unknown
&& finfo
->interface_only
11337 && honor_interface
)
11339 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11340 interface, we will have both finfo->interface_unknown and
11341 finfo->interface_only set. In that case, we don't want to
11342 use the normal heuristics because someone will supply a
11343 #pragma implementation elsewhere, and deducing it here would
11344 produce a conflict. */
11345 comdat_linkage (decl1
);
11346 DECL_EXTERNAL (decl1
) = 0;
11347 DECL_INTERFACE_KNOWN (decl1
) = 1;
11348 DECL_DEFER_OUTPUT (decl1
) = 1;
11352 /* This is a definition, not a reference.
11353 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11354 if (!GNU_INLINE_P (decl1
))
11355 DECL_EXTERNAL (decl1
) = 0;
11357 if ((DECL_DECLARED_INLINE_P (decl1
)
11358 || DECL_TEMPLATE_INSTANTIATION (decl1
))
11359 && ! DECL_INTERFACE_KNOWN (decl1
)
11360 /* Don't try to defer nested functions for now. */
11361 && ! decl_function_context (decl1
))
11362 DECL_DEFER_OUTPUT (decl1
) = 1;
11364 DECL_INTERFACE_KNOWN (decl1
) = 1;
11367 /* Determine the ELF visibility attribute for the function. We must not
11368 do this before calling "pushdecl", as we must allow "duplicate_decls"
11369 to merge any attributes appropriately. We also need to wait until
11371 if (!DECL_CLONED_FUNCTION_P (decl1
))
11372 determine_visibility (decl1
);
11374 begin_scope (sk_function_parms
, decl1
);
11378 if (DECL_DESTRUCTOR_P (decl1
)
11379 || (DECL_CONSTRUCTOR_P (decl1
)
11380 && targetm
.cxx
.cdtor_returns_this ()))
11382 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
11383 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
11386 start_fname_decls ();
11388 store_parm_decls (current_function_parms
);
11392 /* Like start_preparsed_function, except that instead of a
11393 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11395 Returns 1 on success. If the DECLARATOR is not suitable for a function
11396 (it defines a datum instead), we return 0, which tells
11397 yyparse to report a parse error. */
11400 start_function (cp_decl_specifier_seq
*declspecs
,
11401 const cp_declarator
*declarator
,
11406 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
11407 /* If the declarator is not suitable for a function definition,
11408 cause a syntax error. */
11409 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
11412 if (DECL_MAIN_P (decl1
))
11413 /* main must return int. grokfndecl should have corrected it
11414 (and issued a diagnostic) if the user got it wrong. */
11415 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
11416 integer_type_node
));
11418 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
11423 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11427 use_eh_spec_block (tree fn
)
11429 return (flag_exceptions
&& flag_enforce_eh_specs
11430 && !processing_template_decl
11431 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
))
11432 /* We insert the EH_SPEC_BLOCK only in the original
11433 function; then, it is copied automatically to the
11435 && !DECL_CLONED_FUNCTION_P (fn
)
11436 /* Implicitly-generated constructors and destructors have
11437 exception specifications. However, those specifications
11438 are the union of the possible exceptions specified by the
11439 constructors/destructors for bases and members, so no
11440 unallowed exception will ever reach this function. By
11441 not creating the EH_SPEC_BLOCK we save a little memory,
11442 and we avoid spurious warnings about unreachable
11444 && !DECL_ARTIFICIAL (fn
));
11447 /* Store the parameter declarations into the current function declaration.
11448 This is called after parsing the parameter declarations, before
11449 digesting the body of the function.
11451 Also install to binding contour return value identifier, if any. */
11454 store_parm_decls (tree current_function_parms
)
11456 tree fndecl
= current_function_decl
;
11459 /* This is a chain of any other decls that came in among the parm
11460 declarations. If a parm is declared with enum {foo, bar} x;
11461 then CONST_DECLs for foo and bar are put here. */
11462 tree nonparms
= NULL_TREE
;
11464 if (current_function_parms
)
11466 /* This case is when the function was defined with an ANSI prototype.
11467 The parms already have decls, so we need not do anything here
11468 except record them as in effect
11469 and complain if any redundant old-style parm decls were written. */
11471 tree specparms
= current_function_parms
;
11474 /* Must clear this because it might contain TYPE_DECLs declared
11476 current_binding_level
->names
= NULL
;
11478 /* If we're doing semantic analysis, then we'll call pushdecl
11479 for each of these. We must do them in reverse order so that
11480 they end in the correct forward order. */
11481 specparms
= nreverse (specparms
);
11483 for (parm
= specparms
; parm
; parm
= next
)
11485 next
= TREE_CHAIN (parm
);
11486 if (TREE_CODE (parm
) == PARM_DECL
)
11488 if (DECL_NAME (parm
) == NULL_TREE
11489 || TREE_CODE (parm
) != VOID_TYPE
)
11492 error ("parameter %qD declared void", parm
);
11496 /* If we find an enum constant or a type tag,
11497 put it aside for the moment. */
11498 TREE_CHAIN (parm
) = NULL_TREE
;
11499 nonparms
= chainon (nonparms
, parm
);
11503 /* Get the decls in their original chain order and record in the
11504 function. This is all and only the PARM_DECLs that were
11505 pushed into scope by the loop above. */
11506 DECL_ARGUMENTS (fndecl
) = getdecls ();
11509 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
11511 /* Now store the final chain of decls for the arguments
11512 as the decl-chain of the current lexical scope.
11513 Put the enumerators in as well, at the front so that
11514 DECL_ARGUMENTS is not modified. */
11515 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
11517 if (use_eh_spec_block (current_function_decl
))
11518 current_eh_spec_block
= begin_eh_spec_block ();
11522 /* We have finished doing semantic analysis on DECL, but have not yet
11523 generated RTL for its body. Save away our current state, so that
11524 when we want to generate RTL later we know what to do. */
11527 save_function_data (tree decl
)
11529 struct language_function
*f
;
11531 /* Save the language-specific per-function data so that we can
11532 get it back when we really expand this function. */
11533 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
11536 f
= GGC_NEW (struct language_function
);
11537 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
11538 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
11540 /* Clear out the bits we don't need. */
11541 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
11542 f
->bindings
= NULL
;
11543 f
->x_local_names
= NULL
;
11547 /* Set the return value of the constructor (if present). */
11550 finish_constructor_body (void)
11555 if (targetm
.cxx
.cdtor_returns_this ())
11557 /* Any return from a constructor will end up here. */
11558 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
11560 val
= DECL_ARGUMENTS (current_function_decl
);
11561 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
11562 DECL_RESULT (current_function_decl
), val
);
11563 /* Return the address of the object. */
11564 exprstmt
= build_stmt (RETURN_EXPR
, val
);
11565 add_stmt (exprstmt
);
11569 /* Do all the processing for the beginning of a destructor; set up the
11570 vtable pointers and cleanups for bases and members. */
11573 begin_destructor_body (void)
11575 tree compound_stmt
;
11577 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11578 issued an error message. We still want to try to process the
11579 body of the function, but initialize_vtbl_ptrs will crash if
11580 TYPE_BINFO is NULL. */
11581 if (COMPLETE_TYPE_P (current_class_type
))
11583 compound_stmt
= begin_compound_stmt (0);
11584 /* Make all virtual function table pointers in non-virtual base
11585 classes point to CURRENT_CLASS_TYPE's virtual function
11587 initialize_vtbl_ptrs (current_class_ptr
);
11588 finish_compound_stmt (compound_stmt
);
11590 /* And insert cleanups for our bases and members so that they
11591 will be properly destroyed if we throw. */
11592 push_base_cleanups ();
11596 /* At the end of every destructor we generate code to delete the object if
11597 necessary. Do that now. */
11600 finish_destructor_body (void)
11604 /* Any return from a destructor will end up here; that way all base
11605 and member cleanups will be run when the function returns. */
11606 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
11608 /* In a virtual destructor, we must call delete. */
11609 if (DECL_VIRTUAL_P (current_function_decl
))
11612 tree virtual_size
= cxx_sizeof (current_class_type
);
11616 At the point of definition of a virtual destructor (including
11617 an implicit definition), non-placement operator delete shall
11618 be looked up in the scope of the destructor's class and if
11619 found shall be accessible and unambiguous. */
11620 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
11622 /*global_p=*/false,
11623 /*placement=*/NULL_TREE
,
11624 /*alloc_fn=*/NULL_TREE
);
11626 if_stmt
= begin_if_stmt ();
11627 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
11628 current_in_charge_parm
,
11631 finish_expr_stmt (exprstmt
);
11632 finish_then_clause (if_stmt
);
11633 finish_if_stmt (if_stmt
);
11636 if (targetm
.cxx
.cdtor_returns_this ())
11640 val
= DECL_ARGUMENTS (current_function_decl
);
11641 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
11642 DECL_RESULT (current_function_decl
), val
);
11643 /* Return the address of the object. */
11644 exprstmt
= build_stmt (RETURN_EXPR
, val
);
11645 add_stmt (exprstmt
);
11649 /* Do the necessary processing for the beginning of a function body, which
11650 in this case includes member-initializers, but not the catch clauses of
11651 a function-try-block. Currently, this means opening a binding level
11652 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11655 begin_function_body (void)
11659 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
11662 if (processing_template_decl
)
11663 /* Do nothing now. */;
11665 /* Always keep the BLOCK node associated with the outermost pair of
11666 curly braces of a function. These are needed for correct
11667 operation of dwarfout.c. */
11668 keep_next_level (true);
11670 stmt
= begin_compound_stmt (BCS_FN_BODY
);
11672 if (processing_template_decl
)
11673 /* Do nothing now. */;
11674 else if (DECL_DESTRUCTOR_P (current_function_decl
))
11675 begin_destructor_body ();
11680 /* Do the processing for the end of a function body. Currently, this means
11681 closing out the cleanups for fully-constructed bases and members, and in
11682 the case of the destructor, deleting the object if desired. Again, this
11683 is only meaningful for [cd]tors, since they are the only functions where
11684 there is a significant distinction between the main body and any
11685 function catch clauses. Handling, say, main() return semantics here
11686 would be wrong, as flowing off the end of a function catch clause for
11687 main() would also need to return 0. */
11690 finish_function_body (tree compstmt
)
11692 if (compstmt
== NULL_TREE
)
11695 /* Close the block. */
11696 finish_compound_stmt (compstmt
);
11698 if (processing_template_decl
)
11699 /* Do nothing now. */;
11700 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
11701 finish_constructor_body ();
11702 else if (DECL_DESTRUCTOR_P (current_function_decl
))
11703 finish_destructor_body ();
11706 /* Given a function, returns the BLOCK corresponding to the outermost level
11707 of curly braces, skipping the artificial block created for constructor
11711 outer_curly_brace_block (tree fndecl
)
11713 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
11714 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
11715 /* Skip the artificial function body block. */
11716 block
= BLOCK_SUBBLOCKS (block
);
11720 /* Finish up a function declaration and compile that function
11721 all the way to assembler language output. The free the storage
11722 for the function definition.
11724 FLAGS is a bitwise or of the following values:
11726 We just finished processing the body of an in-class inline
11727 function definition. (This processing will have taken place
11728 after the class definition is complete.) */
11731 finish_function (int flags
)
11733 tree fndecl
= current_function_decl
;
11734 tree fntype
, ctype
= NULL_TREE
;
11735 int inclass_inline
= (flags
& 2) != 0;
11738 /* When we get some parse errors, we can end up without a
11739 current_function_decl, so cope. */
11740 if (fndecl
== NULL_TREE
)
11741 return error_mark_node
;
11743 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
11744 && DECL_VIRTUAL_P (fndecl
)
11745 && !processing_template_decl
)
11747 tree fnclass
= DECL_CONTEXT (fndecl
);
11748 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
11749 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
11752 nested
= function_depth
> 1;
11753 fntype
= TREE_TYPE (fndecl
);
11755 /* TREE_READONLY (fndecl) = 1;
11756 This caused &foo to be of type ptr-to-const-function
11757 which then got a warning when stored in a ptr-to-function variable. */
11759 gcc_assert (building_stmt_tree ());
11760 /* The current function is being defined, so its DECL_INITIAL should
11761 be set, and unless there's a multiple definition, it should be
11762 error_mark_node. */
11763 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
11765 /* For a cloned function, we've already got all the code we need;
11766 there's no need to add any extra bits. */
11767 if (!DECL_CLONED_FUNCTION_P (fndecl
))
11769 if (DECL_MAIN_P (current_function_decl
))
11773 /* Make it so that `main' always returns 0 by default (or
11776 stmt
= finish_return_stmt (integer_one_node
);
11778 stmt
= finish_return_stmt (integer_zero_node
);
11780 /* Hack. We don't want the middle-end to warn that this
11781 return is unreachable, so put the statement on the
11783 #ifdef USE_MAPPED_LOCATION
11785 location_t linezero
= linemap_line_start (line_table
, 0, 1);
11786 SET_EXPR_LOCATION (stmt
, linezero
);
11789 annotate_with_file_line (stmt
, input_filename
, 0);
11793 if (use_eh_spec_block (current_function_decl
))
11794 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11795 (TREE_TYPE (current_function_decl
)),
11796 current_eh_spec_block
);
11799 /* If we're saving up tree structure, tie off the function now. */
11800 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
11802 finish_fname_decls ();
11804 /* If this function can't throw any exceptions, remember that. */
11805 if (!processing_template_decl
11806 && !cp_function_chain
->can_throw
11807 && !flag_non_call_exceptions
11808 && !DECL_REPLACEABLE_P (fndecl
))
11809 TREE_NOTHROW (fndecl
) = 1;
11811 /* This must come after expand_function_end because cleanups might
11812 have declarations (from inline functions) that need to go into
11813 this function's blocks. */
11815 /* If the current binding level isn't the outermost binding level
11816 for this function, either there is a bug, or we have experienced
11817 syntax errors and the statement tree is malformed. */
11818 if (current_binding_level
->kind
!= sk_function_parms
)
11820 /* Make sure we have already experienced errors. */
11821 gcc_assert (errorcount
);
11823 /* Throw away the broken statement tree and extra binding
11825 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
11827 while (current_binding_level
->kind
!= sk_function_parms
)
11829 if (current_binding_level
->kind
== sk_class
)
11830 pop_nested_class ();
11832 poplevel (0, 0, 0);
11835 poplevel (1, 0, 1);
11837 /* Statements should always be full-expressions at the outermost set
11838 of curly braces for a function. */
11839 gcc_assert (stmts_are_full_exprs_p ());
11841 /* Set up the named return value optimization, if we can. Candidate
11842 variables are selected in check_return_expr. */
11843 if (current_function_return_value
)
11845 tree r
= current_function_return_value
;
11848 if (r
!= error_mark_node
11849 /* This is only worth doing for fns that return in memory--and
11850 simpler, since we don't have to worry about promoted modes. */
11851 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
11852 /* Only allow this for variables declared in the outer scope of
11853 the function so we know that their lifetime always ends with a
11854 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11855 we were to do this optimization in tree-ssa. */
11856 && (outer
= outer_curly_brace_block (fndecl
))
11857 && chain_member (r
, BLOCK_VARS (outer
)))
11858 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
11860 current_function_return_value
= NULL_TREE
;
11863 /* Remember that we were in class scope. */
11864 if (current_class_name
)
11865 ctype
= current_class_type
;
11867 /* Must mark the RESULT_DECL as being in this function. */
11868 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
11870 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11871 to the FUNCTION_DECL node itself. */
11872 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
11874 /* Save away current state, if appropriate. */
11875 if (!processing_template_decl
)
11876 save_function_data (fndecl
);
11878 /* Complain if there's just no return statement. */
11879 if (warn_return_type
11880 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
11881 && !dependent_type_p (TREE_TYPE (fntype
))
11882 && !current_function_returns_value
&& !current_function_returns_null
11883 /* Don't complain if we abort or throw. */
11884 && !current_function_returns_abnormally
11885 && !DECL_NAME (DECL_RESULT (fndecl
))
11886 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11887 inline function, as we might never be compiled separately. */
11888 && (DECL_INLINE (fndecl
) || processing_template_decl
)
11889 /* Structor return values (if any) are set by the compiler. */
11890 && !DECL_CONSTRUCTOR_P (fndecl
)
11891 && !DECL_DESTRUCTOR_P (fndecl
))
11892 warning (OPT_Wreturn_type
, "no return statement in function returning non-void");
11894 /* Store the end of the function, so that we get good line number
11895 info for the epilogue. */
11896 cfun
->function_end_locus
= input_location
;
11898 /* Genericize before inlining. */
11899 if (!processing_template_decl
)
11901 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
11902 cp_genericize (fndecl
);
11903 /* Clear out the bits we don't need. */
11904 f
->x_current_class_ptr
= NULL
;
11905 f
->x_current_class_ref
= NULL
;
11906 f
->x_eh_spec_block
= NULL
;
11907 f
->x_in_charge_parm
= NULL
;
11908 f
->x_vtt_parm
= NULL
;
11909 f
->x_return_value
= NULL
;
11910 f
->bindings
= NULL
;
11911 f
->extern_decl_map
= NULL
;
11913 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11914 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
11916 /* Clear out the bits we don't need. */
11917 local_names
= NULL
;
11919 /* We're leaving the context of this function, so zap cfun. It's still in
11920 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11922 current_function_decl
= NULL
;
11924 /* If this is an in-class inline definition, we may have to pop the
11925 bindings for the template parameters that we added in
11926 maybe_begin_member_template_processing when start_function was
11928 if (inclass_inline
)
11929 maybe_end_member_template_processing ();
11931 /* Leave the scope of the class. */
11933 pop_nested_class ();
11939 /* Let the error reporting routines know that we're outside a
11940 function. For a nested function, this value is used in
11941 cxx_pop_function_context and then reset via pop_function_context. */
11942 current_function_decl
= NULL_TREE
;
11947 /* Create the FUNCTION_DECL for a function definition.
11948 DECLSPECS and DECLARATOR are the parts of the declaration;
11949 they describe the return type and the name of the function,
11950 but twisted together in a fashion that parallels the syntax of C.
11952 This function creates a binding context for the function body
11953 as well as setting up the FUNCTION_DECL in current_function_decl.
11955 Returns a FUNCTION_DECL on success.
11957 If the DECLARATOR is not suitable for a function (it defines a datum
11958 instead), we return 0, which tells yyparse to report a parse error.
11960 May return void_type_node indicating that this method is actually
11961 a friend. See grokfield for more details.
11963 Came here with a `.pushlevel' .
11965 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11966 CHANGES TO CODE IN `grokfield'. */
11969 start_method (cp_decl_specifier_seq
*declspecs
,
11970 const cp_declarator
*declarator
, tree attrlist
)
11972 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
11975 if (fndecl
== error_mark_node
)
11976 return error_mark_node
;
11978 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
11980 error ("invalid member function declaration");
11981 return error_mark_node
;
11985 cplus_decl_attributes (&fndecl
, attrlist
, 0);
11987 /* Pass friends other than inline friend functions back. */
11988 if (fndecl
== void_type_node
)
11991 if (DECL_IN_AGGR_P (fndecl
))
11993 if (DECL_CONTEXT (fndecl
)
11994 && TREE_CODE (DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
11995 error ("%qD is already defined in class %qT", fndecl
,
11996 DECL_CONTEXT (fndecl
));
11997 return error_mark_node
;
12000 check_template_shadow (fndecl
);
12002 DECL_DECLARED_INLINE_P (fndecl
) = 1;
12003 if (flag_default_inline
)
12004 DECL_INLINE (fndecl
) = 1;
12006 /* We process method specializations in finish_struct_1. */
12007 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
12009 fndecl
= push_template_decl (fndecl
);
12010 if (fndecl
== error_mark_node
)
12014 if (! DECL_FRIEND_P (fndecl
))
12016 if (TREE_CHAIN (fndecl
))
12018 fndecl
= copy_node (fndecl
);
12019 TREE_CHAIN (fndecl
) = NULL_TREE
;
12023 finish_decl (fndecl
, NULL_TREE
, NULL_TREE
);
12025 /* Make a place for the parms. */
12026 begin_scope (sk_function_parms
, fndecl
);
12028 DECL_IN_AGGR_P (fndecl
) = 1;
12032 /* Go through the motions of finishing a function definition.
12033 We don't compile this method until after the whole class has
12036 FINISH_METHOD must return something that looks as though it
12037 came from GROKFIELD (since we are defining a method, after all).
12039 This is called after parsing the body of the function definition.
12040 STMTS is the chain of statements that makes up the function body.
12042 DECL is the ..._DECL that `start_method' provided. */
12045 finish_method (tree decl
)
12047 tree fndecl
= decl
;
12052 if (decl
== void_type_node
)
12055 old_initial
= DECL_INITIAL (fndecl
);
12057 /* Undo the level for the parms (from start_method).
12058 This is like poplevel, but it causes nothing to be
12059 saved. Saving information here confuses symbol-table
12060 output routines. Besides, this information will
12061 be correctly output when this method is actually
12064 /* Clear out the meanings of the local variables of this level;
12065 also record in each decl which block it belongs to. */
12067 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
12069 if (DECL_NAME (link
) != NULL_TREE
)
12070 pop_binding (DECL_NAME (link
), link
);
12071 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
12072 DECL_CONTEXT (link
) = NULL_TREE
;
12075 poplevel (0, 0, 0);
12077 DECL_INITIAL (fndecl
) = old_initial
;
12079 /* We used to check if the context of FNDECL was different from
12080 current_class_type as another way to get inside here. This didn't work
12081 for String.cc in libg++. */
12082 if (DECL_FRIEND_P (fndecl
))
12084 VEC_safe_push (tree
, gc
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
12086 decl
= void_type_node
;
12093 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12094 we can lay it out later, when and if its type becomes complete. */
12097 maybe_register_incomplete_var (tree var
)
12099 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
12101 /* Keep track of variables with incomplete types. */
12102 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
12103 && DECL_EXTERNAL (var
))
12105 tree inner_type
= TREE_TYPE (var
);
12107 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
12108 inner_type
= TREE_TYPE (inner_type
);
12109 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
12111 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
12112 /* RTTI TD entries are created while defining the type_info. */
12113 || (TYPE_LANG_SPECIFIC (inner_type
)
12114 && TYPE_BEING_DEFINED (inner_type
)))
12115 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
12119 /* Called when a class type (given by TYPE) is defined. If there are
12120 any existing VAR_DECLs whose type hsa been completed by this
12121 declaration, update them now. */
12124 complete_vars (tree type
)
12126 tree
*list
= &incomplete_vars
;
12128 gcc_assert (CLASS_TYPE_P (type
));
12131 if (same_type_p (type
, TREE_PURPOSE (*list
)))
12133 tree var
= TREE_VALUE (*list
);
12134 tree type
= TREE_TYPE (var
);
12135 /* Complete the type of the variable. The VAR_DECL itself
12136 will be laid out in expand_expr. */
12137 complete_type (type
);
12138 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
12139 /* Remove this entry from the list. */
12140 *list
= TREE_CHAIN (*list
);
12143 list
= &TREE_CHAIN (*list
);
12146 /* Check for pending declarations which may have abstract type. */
12147 complete_type_check_abstract (type
);
12150 /* If DECL is of a type which needs a cleanup, build and return an
12151 expression to perform that cleanup here. Return NULL_TREE if no
12152 cleanup need be done. */
12155 cxx_maybe_build_cleanup (tree decl
)
12161 /* Assume no cleanup is required. */
12162 cleanup
= NULL_TREE
;
12164 if (error_operand_p (decl
))
12167 /* Handle "__attribute__((cleanup))". We run the cleanup function
12168 before the destructor since the destructor is what actually
12169 terminates the lifetime of the object. */
12170 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
12177 /* Get the name specified by the user for the cleanup function. */
12178 id
= TREE_VALUE (TREE_VALUE (attr
));
12179 /* Look up the name to find the cleanup function to call. It is
12180 important to use lookup_name here because that is what is
12181 used in c-common.c:handle_cleanup_attribute when performing
12182 initial checks on the attribute. Note that those checks
12183 include ensuring that the function found is not an overloaded
12184 function, or an object with an overloaded call operator,
12185 etc.; we can rely on the fact that the functionfound is an
12186 ordinary FUNCTION_DECL. */
12187 fn
= lookup_name (id
);
12188 arg
= build_address (decl
);
12190 cleanup
= build_function_call (fn
, build_tree_list (NULL_TREE
,
12193 /* Handle ordinary C++ destructors. */
12194 type
= TREE_TYPE (decl
);
12195 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
12197 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
12198 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
12199 && CLASSTYPE_VBASECLASSES (type
));
12203 if (TREE_CODE (type
) == ARRAY_TYPE
)
12206 addr
= build_address (decl
);
12208 /* Optimize for space over speed here. */
12209 if (!has_vbases
|| flag_expensive_optimizations
)
12210 flags
|= LOOKUP_NONVIRTUAL
;
12212 call
= build_delete (TREE_TYPE (addr
), addr
,
12213 sfk_complete_destructor
, flags
, 0);
12215 cleanup
= build_compound_expr (cleanup
, call
);
12223 /* When a stmt has been parsed, this function is called. */
12230 /* DECL was originally constructed as a non-static member function,
12231 but turned out to be static. Update it accordingly. */
12234 revert_static_member_fn (tree decl
)
12237 tree function
= TREE_TYPE (decl
);
12238 tree args
= TYPE_ARG_TYPES (function
);
12240 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
12241 != TYPE_UNQUALIFIED
)
12242 error ("static member function %q#D declared with type qualifiers", decl
);
12244 args
= TREE_CHAIN (args
);
12245 tmp
= build_function_type (TREE_TYPE (function
), args
);
12246 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
12247 tmp
= build_exception_variant (tmp
,
12248 TYPE_RAISES_EXCEPTIONS (function
));
12249 TREE_TYPE (decl
) = tmp
;
12250 if (DECL_ARGUMENTS (decl
))
12251 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
12252 DECL_STATIC_FUNCTION_P (decl
) = 1;
12255 /* Initialize the variables used during compilation of a C++
12259 cxx_push_function_context (struct function
* f
)
12261 struct language_function
*p
= GGC_CNEW (struct language_function
);
12264 /* Whenever we start a new function, we destroy temporaries in the
12266 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12272 if (DECL_SAVED_FUNCTION_DATA (fn
))
12274 /* If we already parsed this function, and we're just expanding it
12275 now, restore saved state. */
12276 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
12278 /* We don't need the saved data anymore. Unless this is an inline
12279 function; we need the named return value info for
12280 declare_return_variable. */
12281 if (! DECL_INLINE (fn
))
12282 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
12287 /* Free the language-specific parts of F, now that we've finished
12288 compiling the function. */
12291 cxx_pop_function_context (struct function
* f
)
12296 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12297 one of the language-independent trees. */
12299 enum cp_tree_node_structure_enum
12300 cp_tree_node_structure (union lang_tree_node
* t
)
12302 switch (TREE_CODE (&t
->generic
))
12304 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
12305 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
12306 case OVERLOAD
: return TS_CP_OVERLOAD
;
12307 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
12308 case PTRMEM_CST
: return TS_CP_PTRMEM
;
12309 case BASELINK
: return TS_CP_BASELINK
;
12310 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
12311 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
12312 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
12313 default: return TS_CP_GENERIC
;
12317 /* Build the void_list_node (void_type_node having been created). */
12319 build_void_list_node (void)
12321 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
12326 cp_missing_noreturn_ok_p (tree decl
)
12328 /* A missing noreturn is ok for the `main' function. */
12329 return DECL_MAIN_P (decl
);
12332 /* Return the COMDAT group into which DECL should be placed. */
12335 cxx_comdat_group (tree decl
)
12339 /* Virtual tables, construction virtual tables, and virtual table
12340 tables all go in a single COMDAT group, named after the primary
12342 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
12343 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
12344 /* For all other DECLs, the COMDAT group is the mangled name of the
12345 declaration itself. */
12348 while (DECL_THUNK_P (decl
))
12350 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12351 into the same section as the target function. In that case
12352 we must return target's name. */
12353 tree target
= THUNK_TARGET (decl
);
12354 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
12355 && DECL_SECTION_NAME (target
) != NULL
12356 && DECL_ONE_ONLY (target
))
12361 name
= DECL_ASSEMBLER_NAME (decl
);
12364 return IDENTIFIER_POINTER (name
);
12367 #include "gt-cp-decl.h"